2014年3月22日欧洲人用药品委员会[CHMP]建议批准维多珠单抗 (Entyvio®)为治疗有中度至严重活动性溃疡性结肠炎或克罗恩病已对常规治疗或一种TNFα拮抗剂反应不适当或耐受性成年。
批准日期：2014年5月 20日；公司：Takeda药业有限公司
注射用ENTYVIO(维多珠单抗,vedolizumab)，为静脉使用
作用机制
维多珠单抗是一种人源化单克隆抗体与α4β7整合素特异性结合和阻断α4β7整合素与粘膜地址素细胞[addressin cell]粘附分子-1(MAdCAM-1)的相互作用和抑制记忆T-淋巴细胞跨越内皮进入胃肠道发炎实质组织的迁移。维多珠单抗不结合至或抑制α4β1和αEβ7整合素的功能和不拮抗α4整合素与血管细胞粘附分子-1(VCAM-1)的相互作用。
优先地迁移进入胃肠道的记忆T-淋巴细胞一个离散子集的表面上表达α4β7整合素。MAdCAM-1是主要地在肠道内皮细胞上表达细胞和在T-淋巴细胞归巢[homing]至肠道淋巴组织中起至关重要作用。而α4β7整合素与MAdCAM-1的相互作用对溃疡性结肠炎和克罗恩病的标志[hallmark]的慢性炎症有重要贡献。
适应证和用途
ENTYVIO是一种整合素受体拮抗剂适用为：
成年溃疡性结肠炎(UC)
⑴ 成年有中度至严重活动性UC患者，对一种肿瘤坏死因子(TNF)阻滞剂或免疫调节剂已反应不足，失去反应，或不能耐受；或对皮质激素已反应不足，不能耐受，或显示依赖性：
⒈ 诱导和维持临床反应
⒉ 诱导和维持临床缓解
⒊ 改善内窥镜粘膜外观
⒋ 实现无皮质激素缓解
成年克罗恩病[ Crohn's Disease](CD)
⑵有中度至严重活动性CD成年患者，对一种TNF阻滞剂或免疫调节剂已反应不足，失去反应，或不能耐受；或对皮质激素已反应不足，不能耐受，或显示对依赖性：
⒈ 实现临床反应
⒉ 实现临床缓解
⒊ 实现无皮质激素缓解
剂量和给药方法
⑴ 在UC和CD中推荐剂量：在零，2和6周时，历时约30分钟静脉输注300mg而其后每8周。
⑵ 在第14周时没有显示治疗获益的患者终止ENTYVIO。
⑶ 必须用无菌注射用水重建ENTYVIO冻干粉和给药前必须稀释在250mL无菌0.9%氯化钠。
⑷ 在重建和稀释4个小时内给予输注溶液。
⑸ 在开始用ENTYVIO治疗前(按照当前免疫接种指导原则)给予患者所有最新免疫接种。
剂型和规格
注射用：300mg冻干维多珠单抗在一个单次使用20mL小瓶。
禁忌证
对ENTYVIO或其任何赋形剂曾有已知严重或严重程度超敏性反应患者。
警告和注意事项
⑴ 超敏性反应(包括过敏性反应)：如发生过敏反应或其他严重过敏反应终止ENTYVIO。
⑵ 感染：有活动性，严重感染患者建议不用ENTYVIO治疗直至感染被控制。当用ENTYVIO治疗发生严重感染患者中考虑不给ENTYVIO。
⑶ 进行性多灶性脑白质病：尽管在ENTYVIO临床试验没有观察到病例，用另一种整合素受体拮抗剂治疗患者中曾导致JCV[乳头多瘤空泡病毒]感染导致进行性多灶性脑白质病(PML)和死亡。不能除外PML的风险。监视患者任何新神经学体征和症状或恶化。
不良反应
最常见不良反应(发生率≥3%和≥1%较高于安慰剂)：鼻咽炎，头痛，关节炎，恶心，发热，上呼吸道感染，疲乏，咳嗽，支气管炎，流感，背痛，皮疹，瘙痒，窦炎，口咽痛，和肢体疼痛
如何供应/贮存和处置
ENTYVIO(维多珠单抗[vedolizumab])是在无菌20mL单次使用玻璃小瓶中供应，含300 mg的维多珠单抗作为白色至灰白色饼。
NDC 64764-300-20 在个体纸盒中300 mg单次-剂量小瓶
冷藏未开封小瓶在2°至8°C (36º至46ºF)。保留在原包装避光保护。

Entyvio 300 mg powder for concentrate for solution for infusion
1. Name of the medicinal product
Entyvio 300 mg powder for concentrate for solution for infusion
2. Qualitative and quantitative composition
Each vial contains 300 mg of vedolizumab.
After reconstitution, each ml contains 60 mg of vedolizumab.
Vedolizumab is a humanised IgG1 monoclonal antibody that binds to the human α4β7 integrin and is produced in Chinese hamster ovary (CHO) cells.
For the full list of excipients, see section 6.1.
3. Pharmaceutical form
Powder for concentrate for solution for infusion.
White to off-white lyophilised cake or powder.
4. Clinical particulars
4.1 Therapeutic indications
Ulcerative Colitis
Entyvio is indicated for the treatment of adult patients with moderately to severely active ulcerative colitis who have had an inadequate response with, lost response to, or were intolerant to either conventional therapy or a tumour necrosis factor-alpha (TNFα) antagonist.
Crohn's Disease
Entyvio is indicated for the treatment of adult patients with moderately to severely active Crohn's disease who have had an inadequate response with, lost response to, or were intolerant to either conventional therapy or a tumour necrosis factor-alpha (TNFα) antagonist.
4.2 Posology and method of administration
Entyvio treatment should be initiated and supervised by specialist healthcare professionals experienced in the diagnosis and treatment of ulcerative colitis or Crohn's disease. Patients should be given the package leaflet and the Patient Alert Card.
Posology
Ulcerative Colitis
The recommended dose regimen of Entyvio is 300 mg administered by intravenous infusion at zero, two and six weeks and then every eight weeks thereafter.
Continued therapy for patients with ulcerative colitis should be carefully reconsidered if no evidence of therapeutic benefit is observed by Week 10 (see section 5.1).
Some patients who have experienced a decrease in their response may benefit from an increase in dosing frequency to Entyvio 300 mg every four weeks.
In patients who have responded to treatment with Entyvio, corticosteroids may be reduced and/or discontinued in accordance with standard of care.
Retreatment
If therapy is interrupted and there is a need to restart treatment with Entyvio, dosing at every four weeks may be considered (see section 5.1). The treatment interruption period in clinical trials extended up to one year. Efficacy was regained with no evident increase in adverse events or infusion-related reactions during retreatment with vedolizumab (see section 4.8).
Crohn's disease
The recommended dose regimen of Entyvio is 300 mg administered by intravenous infusion at zero, two and six weeks and then every eight weeks thereafter.
Patients with Crohn's disease, who have not shown a response may benefit from a dose of Entyvio at Week 10 (see section 4.4). Continue therapy every eight weeks from Week 14 in responding patients. Therapy for patients with Crohn's disease should not be continued if no evidence of therapeutic benefit is observed by Week 14 (see section 5.1).
Some patients who have experienced a decrease in their response may benefit from an increase in dosing frequency to Entyvio 300 mg every four weeks.
In patients who have responded to treatment with Entyvio, corticosteroids may be reduced and/or discontinued in accordance with standard of care.
Retreatment
If therapy is interrupted and there is a need to restart treatment with Entyvio, dosing at every four weeks may be considered (see section 5.1). The treatment interruption period in clinical trials extended up to one year. Efficacy was regained with no evident increase in adverse events or infusion-related reactions during retreatment with vedolizumab (see section 4.8).
Paediatric population
The safety and efficacy of vedolizumab in children aged 0 to 17 years old have not been established. No data are available.
Elderly patients
No dose adjustment is required in elderly patients. Population pharmacokinetic analyses showed no effect of age (see section 5.2).
Patients with renal or hepatic impairment
Entyvio has not been studied in these patient populations. No dose recommendations can be made.
Method of administration
Entyvio is for intravenous use only. It is to be reconstituted and further diluted prior to intravenous administration, for instructions see section 6.6.
Entyvio is administered as an intravenous infusion over 30 minutes. Patients should be monitored during and after infusion (see section 4.4).
4.3 Contraindications
Hypersensitivity to the active substance or to any of the excipients listed in section 6.1.
Active severe infections such as tuberculosis, sepsis, cytomegalovirus, listeriosis, and opportunistic infections such as Progressive Multifocal Leukoencephalopathy (PML) (see section 4.4).
4.4 Special warnings and precautions for use
All patients should be observed continuously during each infusion. For the first two infusions, they should also be observed for approximately two hours following completion of the infusion for signs and symptoms of acute hypersensitivity reactions. For all subsequent infusions, patients should be observed for approximately one hour following completion of the infusion.
Infusion-related reactions
In clinical studies, infusion-related reactions (IRR) and hypersensitivity reactions have been reported, with the majority being mild to moderate in severity (see section 4.8).
If a severe IRR, anaphylactic reaction, or other severe reaction occurs, administration of Entyvio must be discontinued immediately and appropriate treatment initiated (e.g., epinephrine and antihistamines) (see section 4.3).
If a mild to moderate IRR occurs, the infusion rate can be slowed or interrupted and appropriate treatment initiated. Once the mild or moderate IRR subsides, continue the infusion. Physicians should consider pre-treatment (e.g., with antihistamine, hydrocortisone and/or paracetamol) prior to the next infusion for patients with a history of mild to moderate IRR to vedolizumab, in order to minimize their risks (see section 4.8).
Infections
Vedolizumab is a gut-selective integrin antagonist with no identified systemic immunosuppressive activity (see section 5.1).
Physicians should be aware of the potential increased risk of opportunistic infections or infections for which the gut is a defensive barrier (see section 4.8). Entyvio treatment is not to be initiated in patients with active, severe infections until the infections are controlled, and physicians should consider withholding treatment in patients who develop a severe infection while on chronic treatment with Entyvio. Caution should be exercised when considering the use of vedolizumab in patients with a controlled chronic severe infection or a history of recurring severe infections. Patients should be monitored closely for infections before, during and after treatment. Entyvio is contraindicated in patients with active tuberculosis (see section 4.3). Before starting treatment with vedolizumab, patients must be screened for tuberculosis according to the local practice. If latent tuberculosis is diagnosed, appropriate treatment must be started with anti-tuberculosis treatment in accordance with local recommendations, before beginning vedolizumab. In patients diagnosed with TB whilst receiving vedolizumab therapy, then vedolizumab therapy should be discontinued until the TB infection has been resolved.
Some integrin antagonists and some systemic immunosuppressive agents have been associated with progressive multifocal leukoencephalopathy (PML), which is a rare and often fatal opportunistic infection caused by the John Cunningham (JC) virus. By binding to the α4β7 integrin expressed on gut-homing lymphocytes, vedolizumab exerts an immunosuppressive effect on the gut. Although no systemic immunosuppressive effect was noted in healthy subjects the effects on systemic immune system function in patients with Inflammatory Bowel Disease patients is not known.
No cases of PML were reported in clinical studies of vedolizumab however, healthcare professionals should monitor patients on vedolizumab for any new onset or worsening of neurological signs and symptoms as outlined in physician education materials, and consider neurological referral if they occur. The patient is to be given a Patient Alert Card (see section 4.2). If PML is suspected, treatment with vedolizumab must be withheld; if confirmed, treatment must be permanently discontinued.
Malignancies
The risk of malignancy is increased in patients with ulcerative colitis and Crohn's disease. Immunomodulatory medicinal products may increase the risk of malignancy (see section 4.8).
Prior and concurrent use of biological products
No vedolizumab clinical trial data are available for patients previously treated with natalizumab or rituximab. Caution should be exercised when considering the use of Entyvio in these patients.
Patients previously exposed to natalizumab should normally wait a minimum of 12 weeks prior to initiating therapy with Entyvio, unless otherwise indicated by the patient's clinical condition.
No clinical trial data for concomitant use of vedolizumab with biologic immunosuppressants are available. Therefore, the use of Entyvio in such patients is not recommended.
Live and oral vaccines
In a placebo-controlled study of healthy volunteers, a single 750 mg dose of vedolizumab did not lower rates of protective immunity to hepatitis B virus in subjects who were vaccinated intramuscularly with three doses of recombinant hepatitis B surface antigen. Vedolizumab-exposed subjects had lower seroconversion rates after receiving a killed, oral cholera vaccine. The impact on other oral and nasal vaccines is unknown. It is recommended that all patients be brought up to date with all immunisations in agreement with current immunisation guidelines prior to initiating Entyvio therapy. Patients receiving vedolizumab treatment may continue to receive non-live vaccines. There are no data on the secondary transmission of infection by live vaccines in patients receiving vedolizumab. Administration of the influenza vaccine should be by injection in line with routine clinical practice. Other live vaccines may be administered concurrently with vedolizumab only if the benefits clearly outweigh the risks.
Induction of remission in Crohn's disease
Induction of remission in Crohn's disease may take up to 14 weeks in some patients. The reasons for this are not fully known and are possibly related to the mechanism of action. This should be taken into consideration, particularly in patients with severe active disease at baseline not previously treated with TNFα antagonists. (See also section 5.1.)
Exploratory subgroup analyses from the clinical trials in Crohn's disease suggested that vedolizumab administered in patients without concomitant corticosteroid treatment may be less effective for induction of remission in Crohn's disease than in those patients already receiving concomitant corticosteroids (regardless of use of concomitant immunomodulators; see section 5.1).
4.5 Interaction with other medicinal products and other forms of interaction
No interaction studies have been performed.
Vedolizumab has been studied in adult ulcerative colitis and Crohn's disease patients with concomitant administration of corticosteroids, immunomodulators (azathioprine, 6-mercaptopurine, and methotrexate), and aminosalicylates. Population pharmacokinetic analyses suggest that co-administration of such agents did not have a clinically meaningful effect on vedolizumab pharmacokinetics. The effect of vedolizumab on the pharmacokinetics of commonly co-administered medicinal compounds has not been studied.
Vaccinations
Live vaccines, in particular live oral vaccines, should be used with caution concurrently with Entyvio (see section 4.4).
4.6 Fertility, pregnancy and lactation
Women of childbearing potential
Women of childbearing potential are strongly recommended to use adequate contraception to prevent pregnancy and to continue its use for at least 18 weeks after the last treatment with Entyvio.
Pregnancy
There are limited amount of data from the use of vedolizumab in pregnant women.
Animal studies do not indicate direct or indirect harmful effects with respect to reproductive toxicity (see section 5.3).
Entyvio is to be used during pregnancy only if the benefits clearly outweigh any potential risk to both the mother and foetus.
Breast-feeding
It is unknown whether vedolizumab is excreted in human milk or absorbed systemically after ingestion.
Available pharmacodynamic/toxicological data in animals have shown excretion of vedolizumab in milk (see section 5.3).
Because maternal antibodies (IgG) are excreted in breast milk, it is recommended that a decision be made whether to discontinue breast-feeding or to discontinue/abstain from Entyvio therapy taking into account the benefit of breast-feeding for the child and the benefit of therapy for the woman.
Fertility
There are no data on the effects of vedolizumab on human fertility. Effects on male and female fertility have not been formally evaluated in animal studies (see section 5.3).
4.7 Effects on ability to drive and use machines
 Entyvio may have a minor influence on the ability to drive or operate machines, as dizziness has been reported in a small number of patients.
4.8 Undesirable effects
Summary of safety profile
Vedolizumab has been studied in three placebo-controlled clinical trials in patients with ulcerative colitis (GEMINI I) or Crohn's disease (GEMINI II and III). In two controlled studies (GEMINI I and II) involving 1,434 patients receiving vedolizumab 300 mg at Week 0, Week 2 and then every eight weeks or every four weeks for up to 52 weeks, and 297 patients receiving placebo for up to 52 weeks, adverse events were reported in 84% of vedolizumab-treated patients and 78% of placebo-treated patients. Over 52 weeks, 19% of vedolizumab-treated patients experienced serious adverse events compared to 13% of placebo-treated patients. Similar rates of adverse events were seen in the every eight week and every four week dosing groups in the Phase 3 clinical trials. The proportion of patients who discontinued treatment due to adverse events was 9% for vedolizumab-treated patients and 10% for placebo-treated patients. In the combined studies of GEMINI I and II the adverse reactions that occurred in ≥5% were nausea, nasopharyngitis, upper respiratory tract infection, arthralgia, pyrexia, fatigue, headache, cough. Infusion-related reactions were reported in 4% of patients receiving vedolizumab.
In the shorter (10 week) placebo controlled induction trial, GEMINI III, the types of adverse reactions reported were similar but occurred at lower frequency than the longer 52 week trials.
A further 279 patients were treated with vedolizumab at Week 0 and Week 2 and then with placebo for up to 52 weeks. Of these patients, 84% experienced adverse events and 15% experienced serious adverse events.
Patients (n=1,822) previously enrolled in Phase 2 or 3 vedolizumab studies were eligible to enrol in an ongoing open-label study and received vedolizumab 300 mg every four weeks.
Tabulated list of adverse reactions
The following listing of adverse reactions is based on the clinical trial experience and are displayed by system organ class. Within the system organ classes, adverse reactions are listed under headings of the following frequency categories: very common (≥1/10), common (≥1/100 to <1/10) and uncommon (≥1/1,000 to <1/100). Within each frequency grouping, adverse reactions are presented in order of decreasing seriousness.

Table 1. Adverse Reactions
System Organ Class	Frequency	Adverse Reaction(s)
Infection and infestation	Very Common	Nasopharyngitis
	Common	Bronchitis, Gastroenteritis, Upper respiratory tract infection, Influenza, Sinusitis, Pharyngitis
	Uncommon	Respiratory tract infection, Vulvovaginal candidiasis, Oral Candidiasis
Nervous system disorders	Very Common	Headache
	Common	Paraesthesia
Vascular disorders	Common	Hypertension
Respiratory, thoracic and mediastinal disorders	Common	Oropharyngeal pain, Nasal congestion, Cough
Gastrointestinal disorders	Common	Anal Abscess, Anal fissure, Nausea, Dyspepsia, Constipation, Abdominal distension, Flatulence, Haemorrhoids
Skin and subcutaneous tissue disorders	Common	Rash, Pruritus, Eczema, Erythema, Night sweats, Acne
	Uncommon	Folliculitis
Musculoskeletal and connective tissue disorders	Very Common	Arthralgia
	Common	Muscle spasms, Back pain, Muscular weakness, Fatigue
General disorders and administration site conditions	Common	Pyrexia
	Uncommon	Infusion site reaction (including: Infusion site pain and Infusion site irritation), Infusion related reaction - Chills, Feeling cold

Description of selected adverse reactions
Infusion-related reactions
In GEMINI I and II controlled studies, 4% of vedolizumab-treated patients and 3% of placebo-treated patients experienced an adverse event defined by the investigator as infusion-related reaction (IRR) (see section 4.4). No individual Preferred Term reported as an IRR occurred at a rate above 1%. The majority of IRRs were mild or moderate in intensity and <1% resulted in discontinuation of study treatment. Observed IRRs generally resolved with no or minimal intervention following the infusion. Most infusion related reactions occurred within the first 2 hours. Of those patients who had infusion related reactions, those dosed with vedolizumab had more infusion related reactions with in the first two hours as compared to placebo patients with infusion related reactions. Most infusion related reactions were not serious and occurred during the infusion or within the first hour after infusion is completed.
One serious adverse event of IRR was reported in a Crohn's disease patient during the second infusion (symptoms reported were dyspnoea, bronchospasm, urticaria, flushing, rash, and increased blood pressure and heart rate) and was successfully managed with discontinuation of infusion and treatment with antihistamine and intravenous hydrocortisone. In patients who received vedolizumab at Weeks 0 and 2 followed by placebo, no increase in the rate of IRR was seen upon retreatment with vedolizumab after loss of response.
Infections
In GEMINI I and II controlled studies, the rate of infections was 0.85 per patient-year in the vedolizumab-treated patients and 0.70 per patient-year in the placebo-treated patients. The infections consisted primarily of nasopharyngitis, upper respiratory tract infection, sinusitis, and urinary tract infections. Most patients continued on vedolizumab after the infection resolved.
In GEMINI I and II controlled studies, the rate of serious infections was 0.07 per patient year in vedolizumab-treated patients and 0.06 per patient year in placebo-treated patients. Over time, there was no significant increase in the rate of serious infections.
In controlled and open-label studies in adults with vedolizumab, serious infections have been reported, which include tuberculosis, sepsis (some fatal), salmonella sepsis, listeria meningitis, and cytomegaloviral colitis.
Immunogenicity
In GEMINI I and II controlled studies, vedolizumab showed an immunogenicity rate of 4% (56 of 1,434 patients who received continuous treatment with vedolizumab were anti-vedolizumab antibody-positive at any time during treatment). Nine out of 56 patients were persistently positive (anti-vedolizumab antibody-positive at two or more study visits) and 33 patients developed neutralizing anti-vedolizumab antibodies.
The frequency of anti-vedolizumab antibody detected in patients 16 weeks after the last dose of vedolizumab (approximately five half-lives after the last dose) was approximately 10% in GEMINI I and II.
In GEMINI I and II controlled studies, 5% (3 of 61) of the patients who had an adverse event assessed by the investigator as an IRR were persistently anti-vedolizumab antibody-positive.
Overall, there was no apparent correlation of anti-vedolizumab antibody development to clinical response or adverse events. However, the number of patients that developed anti-vedolizumab antibodies was too limited to make a definitive assessment.
Malignancy
Overall, results from the clinical program to date do not suggest an increased risk for malignancy with vedolizumab treatment; however, the number of malignancies was small and long-term exposure was limited. Long-term safety evaluations are ongoing.
Reporting of suspected adverse reactions
Reporting suspected adverse reactions after authorisation of the medicinal product is important. It allows continued monitoring of the benefit/risk balance of the medicinal product. Healthcare professionals are asked to report any suspected adverse reactions via the Yellow Card Scheme at: www.mhra.gov.uk/yellowcard.
4.9 Overdose
Doses up to 10 mg/kg (approximately 2.5 times the recommended dose) have been administered in clinical trials. No dose-limiting toxicity was seen in clinical trials.
5. Pharmacological properties
Pharmacotherapeutic group: immunosuppressants, selective immunosuppressants, ATC code: L04AA33
5.1 Pharmacodynamic properties
Vedolizumab is a gut-selective immunosuppressive biologic. It is a humanized monoclonal antibody that binds specifically to the α4β7 integrin, which is preferentially expressed on gut homing T helper lymphocytes. By binding to α4β7 on certain lymphocytes, vedolizumab inhibits adhesion of these cells to mucosal addressin cell adhesion molecule-1 (MAdCAM-1), but not to vascular cell adhesion molecule-1 (VCAM-1). MAdCAM-1 is mainly expressed on gut endothelial cells and plays a critical role in the homing of T lymphocytes to tissues within the gastrointestinal tract. Vedolizumab does not bind to, nor inhibit function of, the α4β1 and αEβ7 integrins.
The α4β7 integrin is expressed on a discrete subset of memory T helper lymphocytes which preferentially migrate into the gastrointestinal (GI) tract and cause inflammation that is characteristic of ulcerative colitis and Crohn's disease, both of which are chronic inflammatory immunologically mediated conditions of the GI tract. Vedolizumab reduces gastrointestinal inflammation in UC patients. Inhibiting the interaction of α4β7 with MAdCAM-1 with vedolizumab prevents transmigration of gut-homing memory T helper lymphocytes across the vascular endothelium into parenchymal tissue in nonhuman primates and induced a reversible 3-fold elevation of these cells in peripheral blood. The murine precursor of vedolizumab alleviated gastrointestinal inflammation in colitic cotton-top tamarins, a model of ulcerative colitis.
In healthy subjects, ulcerative colitis patients, or Crohn's disease patients, vedolizumab does not elevate neutrophils, basophils, eosinophils, B-helper and cytotoxic T lymphocytes, total memory T helper lymphocytes, monocytes or natural killer cells, in the peripheral blood with no leukocytosis observed.
Vedolizumab did not affect immune surveillance and inflammation of the central nervous system in Experimental Autoimmune Encephalomyelitis in non-human primates, a model of multiple sclerosis. Vedolizumab did not affect immune responses to antigenic challenge in the dermis and muscle (see section 4.4). In contrast, vedolizumab inhibited an immune response to a gastrointestinal antigenic challenge in healthy human volunteers (see section 4.4).
Pharmacodynamic effects
In clinical trials with vedolizumab at doses ranging from 2 to 10 mg/kg, >95% saturation of α4β7 receptors on subsets of circulating lymphocytes involved in gut immune surveillance was observed in patients.
Vedolizumab did not affect CD4+ and CD8+ trafficking into the CNS as evidenced by the lack of change in the ratio of CD4+/CD8+ in cerebrospinal fluid pre- and post-vedolizumab administration in healthy human volunteers. These data are consistent with investigations in nonhuman primates which did not detect effects on immune surveillance of the CNS.
Clinical efficacy
Ulcerative Colitis
The efficacy and safety of vedolizumab for the treatment of adult patients with moderately to severely active ulcerative colitis (Mayo score 6 to 12 with endoscopic sub score ≥2) was demonstrated in a randomised, double-blind, placebo-controlled study evaluating efficacy endpoints at Week 6 and Week 52 (GEMINI I). Enrolled patients had failed at least one conventional therapy, including corticosteroids, immunomodulators, and/or the TNFα antagonist infliximab (including primary non-responders). Concomitant stable doses of oral aminosalicylates, corticosteroids and/or immunomodulators were permitted.
For the evaluation of the Week 6 endpoints, 374 patients were randomised in a double-blind fashion (3:2) to receive vedolizumab 300 mg or placebo at Week 0 and Week 2. Primary endpoint was the proportion of patients with clinical response (defined as reduction in complete Mayo score of ≥3 points and ≥30% from baseline with an accompanying decrease in rectal bleeding subscore of ≥1 point or absolute rectal bleeding subscore of ≤1 point) at Week 6. Table 2 shows the results from the primary and secondary endpoints evaluated.

Table 2. Week 6 Efficacy Results of GEMINI I
Endpoint	Placebo N=149	Vedolizumab N=225
Clinical response	26%	47%
Clinical remission§	5%	17%
Mucosal healing	25%	41%
p<0.0001 p≤0.001 p<0.05 Clinical remission: Complete Mayo score of ≤2 points and no individual subscore >1 point Mucosal healing: Mayo endoscopic subscore of ≤1 point

The beneficial effect of vedolizumab on clinical response, remission and mucosal healing was observed both in patients with no prior TNFα antagonist exposure as well as in those who had failed prior TNFα antagonist therapy.
In GEMINI I, two cohorts of patients received vedolizumab at Week 0 and Week 2: cohort 1 patients were randomised to receive either vedolizumab 300 mg or placebo in a double-blind fashion, and cohort 2 patients were treated with open-label vedolizumab 300 mg. To evaluate efficacy at Week 52, 373 patients from cohort 1 and 2 who were treated with vedolizumab and had achieved clinical response at Week 6 were randomised in a double-blind fashion (1:1:1) to one of the following regimens beginning at Week 6: vedolizumab 300 mg every eight weeks, vedolizumab 300 mg every four weeks, or placebo every four weeks. Beginning at Week 6, patients who had achieved clinical response and were receiving corticosteroids were required to begin a corticosteroid-tapering regimen. Primary endpoint was the proportion of patients in clinical remission at Week 52. Table 3 shows the results from the primary and secondary endpoints evaluated.

Table 3. Week 52 Efficacy Results of GEMINI I
Endpoint	Placebo N = 126*	Vedolizumab Every 8 Weeks N = 122	Vedolizumab Every 4 Weeks N = 125
Clinical remission	16%	42%	45%
Durable clinical response	24%	57%	52%
Mucosal healing	20%	52%	56%
Durable clinical remission	9%	20%	24%
Corticosteroid-free clinical remission	14%	31%	45%
*The placebo group includes those subjects who received vedolizumab at Week 0 and Week 2, and were randomised to receive placebo from Week 6 through Week 52. p<0.0001 p<0.001 p<0.05 Durable clinical response: Clinical response at Weeks 6 and 52 Durable clinical remission: Clinical remission at Weeks 6 and 52 Corticosteroid-free clinical remission: Patients using oral corticosteroids at baseline who had discontinued corticosteroids beginning at Week 6 and were in clinical remission at Week 52. Patient numbers were n=72 for placebo, n=70 for vedolizumab every eight weeks, and n=73 for vedolizumab every four weeks

Exploratory analyses provide additional data on key subpopulations studied. Approximately one-third of patients had failed prior TNFα antagonist therapy. Among these patients, 37% receiving vedolizumab every eight weeks, 35% receiving vedolizumab every four weeks, and 5% receiving placebo achieved clinical remission at Week 52. Improvements in durable clinical response (47%, 43%, 16%), mucosal healing (42%, 48%, 8%), durable clinical remission (21%, 13%, 3%) and corticosteroid-free clinical remission (23%, 32%, 4%) were seen in the prior TNFα antagonist failure population treated with vedolizumab every eight weeks, vedolizumab every four weeks and placebo, respectively.
Patients who failed to demonstrate response at Week 6 remained in the study and received vedolizumab every four weeks. Clinical response using partial Mayo scores was achieved at Week 10 and Week 14 by greater proportions of vedolizumab patients (32% and 39%, respectively) compared with placebo patients (15% and 21%, respectively).
Patients who lost response to vedolizumab when treated every eight weeks were allowed to enter an open-label extension study and receive vedolizumab every four weeks. In these patients, clinical remission was achieved in 25% of patients at Week 28 and Week 52.
Patients who achieved a clinical response after receiving vedolizumab at Week 0 and 2 and were then randomised to placebo (for 6 to 52 weeks) and lost response were allowed to enter the open-label extension study and receive vedolizumab every four weeks. In these patients, clinical remission was achieved in 45% of patients by 28 weeks and 36% of patients by 52 weeks.
In this open-label extension study, the benefits of vedolizumab treatment as assessed by partial Mayo score, clinical remission, and clinical response were shown for up to 124 weeks.
Health-related quality of life (HRQOL) was assessed by Inflammatory Bowel Disease Questionnaire (IBDQ), a disease specific instrument, and SF-36 and EQ-5D, which are general measures. Exploratory analysis show clinically meaningful improvements were observed for vedolizumab groups, and the improvements were significantly greater as compared with the placebo group at Week 6 and Week 52 on EQ-5D and EQ-5D VAS scores, all subscales of IBDQ (bowel symptoms, systemic function, emotional function and social function), and all subscales of SF-36 including the Physical Component Summary (PCS) and Mental Component Summary (MCS).
Crohn's Disease
The efficacy and safety of vedolizumab for the treatment of adult patients with moderately to severely active Crohn's Disease (Crohn's Disease Activity Index [CDAI] score of 220 to 450) were evaluated in two studies (GEMINI II and III). Enrolled patients have failed at least one conventional therapy, including corticosteroids, immunomodulators, and/or TNFα antagonists (including primary non-responders). Concomitant stable doses of oral corticosteroids, immunomodulators, and antibiotics were permitted.
The GEMINI II Study was a randomised, double-blind, placebo-controlled study evaluating efficacy endpoints at Week 6 and Week 52. Patients (n=368) were randomised in a double-blind fashion (3:2) to receive two doses of vedolizumab 300 mg or placebo at Week 0 and Week 2. The two primary endpoints were the proportion of patients in clinical remission (defined as CDAI score ≤150 points) at Week 6 and the proportion of patients with enhanced clinical response (defined as a ≥100-point decrease in CDAI score from baseline) at Week 6 (see Table 4).
GEMINI II contained two cohorts of patients that received vedolizumab at Weeks 0 and 2: Cohort 1 patients were randomised to receive either vedolizumab 300 mg or placebo in a double-blind fashion, and Cohort 2 patients were treated with open-label vedolizumab 300 mg. To evaluate efficacy at Week 52, 461 patients from Cohorts 1 and 2, who were treated with vedolizumab and had achieved clinical response (defined as a ≥70-point decrease in CDAI score from baseline) at Week 6,were randomised in a double-blind fashion (1:1:1) to one of the following regimens beginning at Week 6: vedolizumab 300 mg every eight weeks, vedolizumab 300 mg every four weeks, or placebo every four weeks. Patients showing clinical response at Week 6 were required to begin corticosteroid tapering. Primary endpoint was the proportion of patients in clinical remission at Week 52 (see Table 5).
The GEMINI III Study was a second randomised, double-blind, placebo-controlled study that evaluated efficacy at Week 6 and Week 10 in the subgroup of patients defined as having failed at least one conventional therapy and failed TNFα antagonist therapy (including primary non-responders) as well as the overall population, which also included patients who failed at least one conventional therapy and were naïve to TNFα antagonist therapy. Patients (n=416), which included approximately 75% TNFα antagonist failures patients, were randomised in a double-blind fashion (1:1) to receive either vedolizumab 300 mg or placebo at Weeks 0, 2, and 6. The primary endpoint was the proportion of patients in clinical remission at Week 6 in the TNFα antagonist failure subpopulation. As noted in Table 4, although the primary endpoint was not met, exploratory analyses show that clinically meaningful results were observed.

Table 4. Efficacy Results for GEMINI II and III Studies at Week 6 and Week 10
Study Endpoint	Placebo	Vedolizumab
GEMINI II Study
Clinical remission, Week 6
Overall	7% (n = 148)	15%* (n = 220)
TNFα Antagonist(s) Failure	4% (n = 70)	11% (n = 105)
TNFα Antagonist(s) Naïve	9% (n = 76)	17% (n = 109)
Enhanced clinical response, Week 6
Overall	26% (n = 148)	31%† (n = 220)
TNFα Antagonist(s) Failure	23% (n = 70)	24% (n = 105)
TNFα Antagonist(s) Naïve	30% (n = 76)	42% (n = 109)
Serum CRP change from baseline to Week 6, median (mcg/mL)
Overall	-0.5 (n = 147)	-0.9 (n = 220)
GEMINI III Study
Clinical remission, Week 6
Overall	12% (n = 207)	19% (n = 209)
TNFα Antagonist(s) Failure	12% (n = 157)	15%§ (n = 158)
TNFα Antagonist(s) Naïve	12% (n = 50)	31% (n = 51)
Clinical remission, Week 10
Overall	13% (n = 207)	29% (n = 209)
TNFα Antagonist(s) Failure	12% (n = 157)	27% (n = 158)
TNFα Antagonist(s) Naïve	16% (n = 50)	35% (n = 51)
Sustained clinical remission
Overall	8% (n = 207)	15% (n = 209)
TNFα Antagonist(s) Failure	8% (n = 157)	12% (n = 158)
TNFα Antagonist(s) Naïve	8% (n = 50)	26% (n = 51)
Enhanced clinical response, Week 6
Overall^	23% (n = 207)	39% (n = 209)
TNFα Antagonist(s) Failure	22% (n = 157)	39% (n = 158)
TNFα Antagonist(s) Naïve^	24% (n = 50)	39% (n = 51)
p<0.05 not statistically significant secondary endpoint to be viewed as exploratory by pre-specified statistical testing procedure not statistically significant, the other endpoints were therefore not tested statistically n=157 for placebo and n=158 for vedolizumab Sustained clinical remission: clinical remission at Weeks 6 and 10 Exploratory Endpoint

Table 5. Efficacy Results for GEMINI II at Week 52
	Placebo N=153*	Vedolizumab Every 8 Weeks N=154	Vedolizumab Every 4 Weeks N=154
Clinical remission	22%	39%	36%
Enhanced clinical response	30%	44%	45%
Corticosteroid-free clinical remission	16%	32%	29%
Durable clinical remission	14%	21%	16%
*The placebo group includes those subjects who received vedolizumab at Week 0 and Week 2, and were randomised to receive placebo from Week 6 through Week 52. p<0.001 p<0.05 Corticosteroid-free clinical remission: Patients using oral corticosteroids at baseline who had discontinued corticosteroids beginning at Week 6 and were in clinical remission at Week 52. Patient numbers were n=82 for placebo, n=82 for vedolizumab every eight weeks, and n=80 for vedolizumab every four weeks Durable clinical remission: Clinical remission at ≥80% of study visits including final visit (Week 52)

Exploratory analyses examined the effects of concomitant corticosteroids and immunomodulators on induction of remission with vedolizumab. Combination treatment, most notably with concomitant corticosteroids, appeared to be more effective in inducing remission in Crohn's disease than vedolizumab alone or with concomitant immunomodulators, which showed a smaller difference from placebo in the rate of remission. Clinical remission rate in GEMINI II at Week 6 was 10% (difference from placebo 2%, 95% CI: -6, 10) when administered without corticosteroids compared to 20% (difference from placebo 14%, 95% CI: -1, 29) when administered with concomitant corticosteroids. In GEMINI III at Week 6 and 10 the respective clinical remission rates were 18% (difference from placebo 3%, 95% CI: -7, 13) and 22% (difference from placebo 8%, 95% CI: -3, 19) when administered without corticosteroids compared to 20% (difference from placebo 11%, 95% CI: 2, 20) and 35% (difference from placebo 23%, 95% CI: 12, 33) respectively when administered with concomitant corticosteroids. These effects were seen whether or not immunomodulators were also concomitantly administered.
Exploratory analyses provide additional data on key subpopulations studied. In GEMINI II, approximately half of patients had previously failed TNFα antagonist therapy. Among these patients, 28% receiving vedolizumab every eight weeks, 27% receiving vedolizumab every four weeks, and 13% receiving placebo achieved clinical remission at Week 52. Enhanced clinical response was achieved in 29%, 38%, 21%, respectively, and corticosteriod-free clinical remission was achieved in 24%, 16%, 0%, respectively.
Patients who failed to demonstrate response at Week 6 in GEMINI II were retained in the study and received vedolizumab every four weeks. Enhanced clinical response was observed at Week 10 and Week 14 for greater proportions of vedolizumab patients 16% and 22%, respectively, compared with placebo patients 7% and 12%, respectively. There was no clinically meaningful difference in clinical remission between treatment groups at these time points. Analyses of Week 52 clinical remission in patients who were non-responders at Week 6 but achieved response at Week 10 or Week 14 indicate that non-responder CD patients may benefit from a dose of vedolizumab at Week 10.
Patients who lost response to vedolizumab when treated every eight weeks in GEMINI II were allowed to enter an open-label extension study and received vedolizumab every four weeks. In these patients, clinical remission was achieved in 23% of patients at Week 28 and 32% of patients at Week 52.
Patients who achieved a clinical response after receiving vedolizumab at Week 0 and 2 and were then randomised to placebo (for 6 to 52 weeks) and lost response were allowed to enter the open-label extension study and receive vedolizumab every four weeks. In these patients, clinical remission was achieved in 46% of patients by 28 weeks and 41% of patients by 52 weeks.
In this open-label extension study, clinical remission and clinical response were observed in patients for up to 124 weeks.
Exploratory analysis showed clinically meaningful improvements were observed for the vedolizumab every four weeks and every eight weeks groups in GEMINI II and the improvements were significantly greater as compared with the placebo group from baseline to Week 52 on EQ-5D and EQ-5D VAS scores, total IBDQ score, and IBDQ subscales of bowel symptoms and systemic function.
Paediatric population
The European Medicines Agency has deferred the obligation to submit the results of studies with vedolizumab in one or more subsets of the paediatric population in ulcerative colitis and Crohn's disease (see section 4.2).
5.2 Pharmacokinetic properties
The single and multiple dose pharmacokinetics of vedolizumab have been studied in healthy subjects and in patients with moderate to severely active ulcerative colitis or Crohn's disease.
In patients administered 300 mg vedolizumab as a 30 minute intravenous infusion on Weeks 0 and 2, mean serum trough concentrations at Week 6 were 27.9 mcg/ml (SD ± 15.51) in ulcerative colitis and 26.8 mcg/ml (SD ± 17.45) in Crohn's disease. Starting at Week 6, patients received 300 mg vedolizumab every eight or four weeks. In patients with ulcerative colitis, mean steady-state serum trough concentrations were 11.2 mcg/ml (SD ± 7.24) and 38.3 mcg/ml (SD ± 24.43), respectively. In patients with Crohn's disease mean steady-state serum trough concentrations were 13.0 mcg/ml (SD ± 9.08) and 34.8 mcg/ml (SD ± 22.55), respectively.
Distribution
Population pharmacokinetic analyses indicate that the distribution volume of vedolizumab is approximately 5 litres. The plasma protein binding of vedolizumab has not been evaluated. Vedolizumab is a therapeutic monoclonal antibody and is not expected to bind to plasma proteins.
Vedolizumab does not pass the blood brain barrier after intravenous administration. Vedolizumab 450 mg administered intravenously was not detected in the cerebrospinal fluid of healthy subjects.
Elimination
Population pharmacokinetic analyses indicate that vedolizumab has a total body clearance of approximately 0.157 L/day and a serum half-life of 25 days. The exact elimination route of vedolizumab is not known. Population pharmacokinetic analyses suggest that while low albumin, higher body weight, prior treatment with anti-TNF drugs and presence of anti-vedolizumab antibody may increase vedolizumab clearance, the magnitude of their effects is not considered to be clinically relevant.
Linearity
Vedolizumab exhibited linear pharmacokinetics at serum concentrations greater than 1 mcg/ml.
Special populations
Age does not impact the vedolizumab clearance in ulcerative colitis and Crohn's disease patients based on the population pharmacokinetic analyses. No formal studies have been conducted to examine the effects of either renal or hepatic impairment on the pharmacokinetics of vedolizumab.
5.3 Preclinical safety data
Non-clinical data reveal no special hazard for humans based on conventional studies of safety pharmacology, repeated dose toxicity, as well as reproductive and development toxicology studies.
Long-term animal studies with vedolizumab to assess its carcinogenic potential have not been conducted because pharmacologically responsive models to monoclonal antibodies do not exist. In a pharmacologically responsive species (cynomolgus monkeys), there was no evidence of cellular hyperplasia or systemic immunomodulation that could potentially be associated with oncogenesis in 13- and 26-week toxicology studies. Furthermore, no effects were found of vedolizumab on the proliferative rate or cytotoxicity of a human tumour cell line expressing the α4β7 integrin in vitro.
No specific fertility studies in animals have been performed with vedolizumab. No definitive conclusion can be drawn on the male reproductive organs in cynomolgus monkey repeated dose toxicity study, but given the lack of binding of vedolizumab to male reproductive tissue in monkey and human, and the intact male fertility observed in β7 integrin-knockout mice, it is not expected that vedolizumab will affect male fertility.
Administration of vedolizumab to pregnant cynomolgus monkeys during most of gestation resulted in no evidence of effects on teratogenicity, prenatal or postnatal development in infants up to 6 months of age. Low levels (<300 mcg/L) of vedolizumab were detected on post-partum Day 28 in the milk of 3 of 11 cynomolgus monkeys treated 100 mg/kg of vedolizumab dosed every 2 weeks and not in any animals that received 10 mg/kg. It is not known whether vedolizumab is excreted in human milk.
6. Pharmaceutical particulars
6.1 List of excipients
L-histidine
L-histidine monohydrochloride
L-arginine hydrochloride
sucrose
polysorbate 80
6.2 Incompatibilities
In the absence of compatibility studies, this medicinal product must not be mixed with other medicinal products.
6.3 Shelf life
3 years
Chemical and physical in-use stability of the reconstituted and diluted solution has been demonstrated for 12 hours at 20°C-25°C and 24 hours at 2°C-8°C. From a microbiological point of view, the product must be used immediately. Do not freeze the reconstituted or diluted solution. If not used immediately, in-use storage times and conditions prior to use are the responsibility of the user and must not be longer than a total of 24 hours. This 24 hour hold may include up to 12 hours at 20°C-25°C; any additional hold time must be at 2°C-8°C.
6.4 Special precautions for storage
Store in a refrigerator (2°C-8°C). Keep the vial in the outer carton in order to protect from light.
For storage conditions after reconstitution and dilution of the medicinal product, see section 6.3.
6.5 Nature and contents of container
Entyvio 300 mg powder for concentrate for solution for infusion in Type 1 glass vial (20 ml) fitted with rubber stopper and aluminium crimp protected by a plastic cap.
Each pack contains 1 vial.
6.6 Special precautions for disposal and other handling
Instructions for reconstitution and infusion
Entyvio should be at room temperature (20°C -25°C) when reconstituted.
1. Use aseptic technique when preparing Entyvio solution for intravenous infusion. Remove flip-off cap from the vial and wipe with alcohol swab. Reconstitute vedolizumab with 4.8 ml of sterile water for injection, using a syringe with a 21-25 gauge needle.
2. Insert the needle into the vial through the centre of the stopper and direct the stream of liquid to the wall of the vial to avoid excessive foaming.
3. Gently swirl the vial for at least 15 seconds. Do not vigorously shake or invert.
4. Let the vial sit for up to 20 minutes to allow for reconstitution and for any foam to settle; the vial can be swirled and inspected for dissolution during this time. If not fully dissolved after 20 minutes, allow another 10 minutes for dissolution.
5. Inspect the reconstituted solution visually for particulate matter and discoloration prior to administration. Solution should be clear or opalescent, colourless to light yellow and free of visible particulates. Reconstituted solution with uncharacteristic colour or containing particulates must not be administered.
6. Prior to withdrawing reconstituted solution from vial, gently invert vial 3 times.
7. Withdraw 5 ml (300 mg) of reconstituted Entyvio using a syringe with a 21-25 gauge needle.
8. Add the 5 ml (300 mg) of reconstituted Entyvio to 250 ml of sterile 0.9% sodium chloride solution, and gently mix the infusion bag (5 ml of 0.9% sodium chloride solution does not have to be withdrawn from the infusion bag prior to adding Entyvio). Do not add other medicinal products to the prepared infusion solution or intravenous infusion set. Administer the infusion solution over 30 minutes (see section 4.2).
Entyvio does not contain preservatives. Once reconstituted, the infusion solution should be used as soon as possible. However, if necessary, the infusion solution may be stored for up to 24 hours: this 24 hour hold may include up to 12 hours at 20°C-25°C; any additional hold time must be at 2°C -8°C. Do not freeze. Do not store any unused portion of the infusion solution for reuse.
Each vial is for single-use only.
Any unused medicinal product or waste material should be disposed of in accordance with local requirements.
7. Marketing authorisation holder
Takeda Pharma A/S
Dybendal Alle 10
2630 Taastrup
Denmark
8. Marketing authorisation number(s)
EU/1/14/923/001
9. Date of first authorisation/renewal of the authorisation
Date of first authorisation: 22 May 2014
10. Date of revision of the text
22 May 2014
Detailed information on this medicinal product is available on the website of the European Medicines Agency http://www.ema.europa.eu
美国FDA批准Entyvio治疗溃疡性结肠炎和克罗恩病[Crohn's disease]
2014年4月20日美国食品药品监督管理局(FDA)批准注射用Entyvio(维多珠单抗[vedolizumab])治疗成年患者有中度至严重溃疡性结肠炎和成年患者有中度至严重克罗恩病。
Entyvio被批准治疗情况当一种或更多标准治疗(皮质激素，免疫调节剂，或肿瘤坏死因子阻断剂药物)已不能导致适当反应的患者。
溃疡性结肠炎是一种慢性疾病影响约620,000美国人。它引起在大肠内衬里炎症和溃疡和是慢性炎症性大肠病的两种主要形式之一。炎症可导致腹部不适，胃肠道出血，和腹泻。
克罗恩病是一种慢性炎症性情况引起炎症，或肿胀，和胃肠道任何部分刺激。50万以上美国人曾被诊断为有克罗恩病。
FDA的药物评价和研究中心药物评价III室代主任Amy G. Egan，M.D.，M.P.H.说：“溃疡性结肠炎和克罗恩病是使人衰弱疾病影响患这种情况患者生活质量，”“虽然这种情况没有治愈，今天的批准为用常规治疗控制症状，反应不佳的患者提供一种重要的新治疗。”
在两项临床试验涉及约900例曾对皮质激素，免疫调节剂，或肿瘤坏死因子阻断剂药物反应不适当患者中确定Entyvio对溃疡性结肠炎的安全性和有效性。患者的评价包括测量排便次数，直肠出血，内窥镜发现和医生总体评估。
结果用Entyvio治疗的参加者比安慰剂显示实现和维持临床反应，实现和维持临床缓解，实现无皮质激素临床缓解，和如内窥镜时所见曾改善结肠外观。
在三项临床试验涉及约1,500例对皮质激素，免疫调节剂，或肿瘤坏死因子阻断剂药物反应不适当患者中确定Entyvio对克罗恩病的安全性和疗效。结果显示用Entyvio治疗的参加者比安慰剂显示实现临床反应，实现临床缓解，和实现无皮质激素临床缓解。
Entyvio是一种整合素[Integrin]受体拮抗剂。整合素受体是在某些细胞上表达的蛋白。整合素受体功能如同细胞-细胞相互作用的桥梁。Entyvio阻断一种特异性整合素受体(在循环炎症细胞上表达)与一种特异性蛋白(在血管的内壁细胞上表达)，和因此阻断循环炎症细胞跨越那些血管的迁移和进入胃肠道这的炎症区域。用Entyvio治疗患者中最常见副作用包括头痛，关节痛，恶心，和发热。用Entyvio伴随最严重风险包括严重感染，超敏性和输注-相关反应；和肝毒性。
整合素受体拮抗剂的另一种类型曾伴随进行性多灶性脑白质病变(PML)，一种中枢神经系统罕见和往往致命性机遇性感染。PML是由病毒所致和典型地只发生在免疫系统受损患者。Entyvio临床试验参加中没有被鉴定的脑白质病变PML病例。
在Entyvio 临床试验中，参加者频繁和常规筛选被积极监视PML，和需要时评价任何新，不能解释的神经学症状。因为临床试验是在严格控制条件下进行，在临床试验中观察到某个药物的不良反应可能不反映实际。因此，在Entyvio临床试验中参加患者没有见到PML病例，在服用Entyvio患者中有关PML的风险仍不确定。
卫生保健专业人员应监视用Entyvio患者对任何神经学体征和症状的新发作，或恶化。FDA 将继续与承办单位工作通过一项被要求上市后研究和增强，加快不良事件报告进一步研究脑白质病变PML的风险。
鼓励消费者和卫生保健专业人员报告来自使用Entyvio不良反应至FDA的 MedWatch 不良事件报告程序在 www.fda.gov/MedWatch或通过电话1-800-FDA-1088。
Entyvio由迪尔菲尔德，伊利诺伊州的武田制药[Takeda Pharmaceuticals]美国公司上市。
2014年3月22日欧洲人用药品委员会[CHMP]建议批准维多珠单抗 (Entyvio®)为治疗有中度至严重活动性溃疡性结肠炎或克罗恩病已对常规治疗或一种TNFα拮抗剂反应不适当或耐受性成年。
http://www.fda.gov/NewsEvents/Newsroom/PressAnnouncements/ucm398065.htm
http://www.ema.europa.eu/docs/en_GB/document_library/Summary_of_opinion_-_Initial_authorisation/human/002782/WC500163492.pdf