A Phase II Vaccine Dose Finding Pilot Study for Development of an Anti-Influenza A (H5N1) Intravenous Hyper-Immune Globulin
试验速览
- 阶段
- 2 期
- 状态
- 终止
- 入组人数
- 126
- 试验地点
- 2
- 主要终点
- Safety of H5N1 Vaccine as Measured by Adverse Events
研究概览
简要总结
This study will determine how best to use a vaccine for generating high levels of antibodies called immune globulins (IVIG) in people, which, in turn, can be collected and used to develop a possible treatment for avian influenza (bird flu). Immune globulins are proteins made by the body that attack the influenza virus. This study will use an experimental bird flu vaccine to stimulate immune globulin production in healthy people. The vaccine is similar to the regular influenza vaccine and has been studied in more than 450 people. This study will use high doses of the vaccine to generate high antibody levels that can be collected for producing the new treatment.
Healthy adults between 18 and 60 years of age who weigh at least 110 pounds may be eligible for this study. Candidates are screened with a medical history and physical examination.
Participants are given one of three doses of the vaccine, depending on when they enter the study. The first 25 people enrolled receive a dose of 90 micrograms (mcg). If this dose is well tolerated, the next 25 people receive 120 mcg, and if this dose is also well tolerated, the last 25 people receive 180 mcg. Vaccination consists of either two shots (one in the muscle of each arm) or one shot in the buttock on four occasions. Subjects are vaccinated on four occasions, each 4 weeks apart. On the day of each vaccination, subjects provide a blood sample to evaluate blood counts, chemistries, and antibody levels, and to test for HIV, hepatitis B and C, syphilis, and antibody against avian flu. For 7 days after each vaccination, subjects keep a diary card to record any symptoms, such as pain, fever, muscle aches, or others. At the end of the 7 days, they are contacted by study staff to report the symptoms.
In addition to the vaccinations, subjects undergo apheresis to collect IVIG once their blood test shows moderately high antibody levels. For this procedure, blood is collected through a needle in an arm vein and flows through a catheter (plastic tube) into a machine that separates the blood cells from the antibodies and protein. The antibodies and protein are collected and the rest of the blood is returned to the body. Subjects are asked to undergo at least three apheresis procedures.
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详细描述
Avian influenza presents a threat of a future pandemic. Over 200 people have been infected with the influenza A H5N1 virus, and the mortality is near 60 percent. Optimal therapy is not known, and failures of and resistance to currently available anti-virals have been reported.
The primary purpose of this Protocol is to determine the optimal vaccination schedule that creates a pool of hyper immunized individuals with high titer anti-influenza A (H5N1) antibodies. The Protocol will consist of a dose escalation study to determine the optimal vaccination dose and number of vaccinations. There are stopping rules based on the number and severity of adverse events that occur between the doses and between the cohorts. The optimal vaccination schedule that is determined could then be used in a larger population to develop a high titer anti-influenza A (H5N1) intravenous hyper-immune globulin (IVIG).
After all vaccinations have occured, and if an adequate antibody titer is reached in this study population, subjects will begin apheresis. Each subject will be asked to participate in 3 apheresis sessions, but may participate in up to 10 apheresis sessions.
研究设计
- 研究类型
- Interventional
- 分配方式
- Non Randomized
- 干预模型
- Parallel
- 主要目的
- Other
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 59 Years（Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- 未提供
排除标准
- •Has a medical history of
- •Thrombocytopenia or other blood dyscrasias
- •congestive heart failure
- •pulmonary hypertension
- •bleeding diathesis or therapeutic anticoagulation
- •Hepatitis B
- •Hepatitis C
- •Known history of hepatitis after the 11th birthday.
- •Trypanosomiasis (Chagas' disease and sleeping sickness)
- •Leishmaniasis (Kala-azar)
- •Filariasis
- •Allergy to eggs, thimerosal, or other components of the vaccine
- •Severe reactions following immunization with contemporary influenza virus vaccines
- •Autoimmune disease or a history of Guillain-Barré
- •History of cancer that meets any one of the following criteria:
- •Non-melanoma skin cancers within the last 1 year
- •Melanoma or any other cancer (excluding non-melanoma skin cancers) at any time
- •Medication history that includes any of the following:
- •Current use of oral or parenteral steroids, high-dose inhaled steroids (>800 mcg/day of beclomethasone dipropionate or equivalent) or other immunosuppressive or cytotoxic drugs
- •Finasteride (Proscar, Propecia) within the last 1 month.
- •Isotretinoin (Accutane) within the last 1 month.
- •Acitretin (Soriatane) within the last 3 years.
- •Etretinate (Tegison) at any time.
- •Dutasteride (Avodart) within the last 6 months.
- •Growth hormone made from human pituitary glands at any time.
- •Beef insulin from the United Kingdom at any time.
- •Has ever had any of the following:
- •Sexual contact with someone known to have HIV.
- •Had a relative with Creutzfeldt-Jakob Disease, or been told that this disease is inherited within the family.
- •Received blood transfusion in the United Kingdom.
- •History of receiving money, drugs or other payment for sex.
- •History of receiving clotting factor concentrates.
- •History of a dura mater graft.
- •History of babesiosis.
- •For male donors, history of sexual contact with another male.
- •Used needles to take drugs, steroids, or other medications not prescribed by a physician.
- •Was born, lived in, had blood donation in or ever had sexual contact with anyone who lived in Cameroon, Central African Republic, Chad, Congo, Equatorial Guinea, Gabon, Niger, or Nigeria after
- •History of living 3 or more months total (need not be consecutive) in the UK from 1980-
- •History of living 5 or more years total (need not be consecutive) in Europe since
- •History of living 6 or more months total (need not be consecutive) on a U.S. military base in Europe from 1980-1996 (specifically from 1980 through 1990 in Belgium, the Netherlands, or Germany, and from 1980 through 1996 in Spain, Portugal, Turkey, Italy or Greece).
- •Within the last 3 weeks received the seasonal (conventional trivalent) flu vaccine
- •Within the last 8 weeks:
- •Was vaccinated with the small pox vaccine, or was in close contact with someone who was vaccinated (i.e., close family member).
- •Within the last 3 months has:
- •Current or previous participation in any other apheresis procedures/protocols (not related to this protocol).
- •Within the last 4 months has had:
- •A blood donation of a double unit of red cells.
- •Within the last 12 months has:
- •Received any blood or blood component.
- •Donated blood at a paid donation center (donations at a hospital blood bank do not apply).
- 另有 20 项未显示
研究组 & 干预措施
Cohort 1
H5N1 vaccine - 90 mcg IM every 4 week x 4 doses Apheresis - if HAI titer above 1:160
干预措施: H5N1 vaccine (Biological)
Cohort 1
H5N1 vaccine - 90 mcg IM every 4 week x 4 doses Apheresis - if HAI titer above 1:160
干预措施: Apheresis (Procedure)
Cohort 2
H5N1 vaccine - 120 mcg IM every 4 week x 4 doses Apheresis - if HAI titer above 1:160
干预措施: H5N1 vaccine (Biological)
Cohort 2
H5N1 vaccine - 120 mcg IM every 4 week x 4 doses Apheresis - if HAI titer above 1:160
干预措施: Apheresis (Procedure)
Cohort 3
H5N1 vaccine - 180 mcg IM every 4 week x 4 doses Apheresis - if HAI titer above 1:160
干预措施: H5N1 vaccine (Biological)
Cohort 3
H5N1 vaccine - 180 mcg IM every 4 week x 4 doses Apheresis - if HAI titer above 1:160
干预措施: Apheresis (Procedure)
Cohort 4
H5N1 vaccine - 180 mcg IM every 4 weeks x 2 doses, injection site randomized to either deltoid or gluteus Apheresis - if HAI titer above 1:160
干预措施: H5N1 vaccine (Biological)
Cohort 4
H5N1 vaccine - 180 mcg IM every 4 weeks x 2 doses, injection site randomized to either deltoid or gluteus Apheresis - if HAI titer above 1:160
干预措施: Apheresis (Procedure)
结局指标
主要结局
Safety of H5N1 Vaccine as Measured by Adverse Events
时间窗: Day 28, 56, 84
The number of subjects experiencing adverse events after receiving H5N1 vaccine
次要结局
未报告次要终点