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Background:
Objectives:
Eligibility:
Design:
Full description
Two types of influenza A widely circulate in humans and cause seasonal outbreaks and epidemics - H1N1 (swine flu) and H3N2 (a subtype abundant in seasonal influenza). During the 2009-2010 influenza season, the most commonly reported virus was influenza A (H1N1). However, during the 2010-2011 influenza season, the most commonly reported virus was influenza A (H3N2), but influenza A (H1N1) viruses and influenza B viruses circulated as well.
A certain age group may be hit harder by one type of influenza virus than another (for example, the 2009 H1N1 virus disproportionately affected people younger than 65 years of age rather than those older than 65, whereas H3N2 virus often affects those older than 65 years). However, influenza A has a substantial health effect on every age group.
Due to the limited therapeutic options for influenza and significant morbidity and mortality despite treatment, additional therapeutics are warranted. One potential therapeutic that is fairly rapidly available is the use of anti-influenza A immune plasma as immunotherapy.
The objective of this protocol is collection of anti-influenza A immune plasma from male volunteers that meet criteria for use in human plasma therapy studies. The use of plasma from male donors will minimize the risk of transfusion related acute lung injury (TRALI), which has been associated with antibodies (likely generated during pregnancy) found in female plasma. For this reason, only male donors will be enrolled.
This protocol does not administer any investigational product, but rather collects plasma from subjects with a high anti-influenza A antibody titer (convalescent survivors of influenza infection or recipients of a licensed influenza vaccine).
Following screening of potential subjects to identify those who are not eligible to participate in plasma donations and to determine the likelihood of having antibodies to influenza A (H1N1 or H3N2) from a recent infection or immunization, enrolled subjects will receive a baseline physical and laboratory examination. Eligible subjects with high influenza A hemagglutination inhibition (HAI) titers will then be scheduled for at least 3 (and up to 20) plasma collection sessions. Following testing of the collected plasma for potential pathogens, it may be used as therapeutic plasma, and/or it may be used for the manufacturing of high titer anti-influenza A intravenous immune globulin (IVIG). Both options would support clinical trials aimed at developing additional therapeutics for influenza infection.
Enrollment
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Volunteers
Inclusion and exclusion criteria
INCLUSION CRITERIA:
Provide written informed consent before initiation of any study procedures.
Male adults between the ages of 18 and 60 years old
History suggestive of having anti-influenza A antibodies (either of the following):
Adequate clinical parameters (all of the following):
Weight greater than or equal to 110 pounds (50 kg)
Adequate peripheral venous access for plasma donation (as judged by the examiner)
Willingness to have samples stored
EXCLUSION CRITERIA:
Any sign of active influenza, (as judged by the investigator) including but not limited to:
Has a medical history of
History of cancer that meets any one of the following criteria:
Medication history that includes any of the following:
Has ever had any of the following:
Within the 8 weeks prior to enrollment:
a. Was vaccinated with the small pox vaccine, or was in close contact with someone who was vaccinated (i.e., close family member)
Within the 4 months prior to enrollment has had:
a. A blood donation of a double unit of red cells
Within the 12 months prior to enrollment has:
Within the last 12 months has had sexual contact with (any of the following):
Participation in medical research that includes:
Subjects that have participated in previous plasma collection or other cell component collection within the last 3 months may have restrictions to participation based on the site plasma collection SOP. In this scenario, discussion should occur with the blood establishment to ensure eligibility to donate plasma.
PLASMA DONATION CRITERIA (all of the following):
Anti-Influenza A HAI titer of 1:160 or greater and H3N2 HAI titer of at least 1:40
Adequate laboratory parameters from screening (must meet all of the criteria below)
Hemoglobin level of greater than or equal to 12.5 g/dL
HCT greater than or equal to 38%
Platelets greater than or equal to 150 x 10^3/cubic mm
Total serum protein greater than or equal to 6.0 g/dl
Quantitative immune globulin levels (all of the following)
Review of other screening labs should ensure no other underlying medical condition that would increase subject's risk of apheresis.
Negative serologic and molecular tests for blood borne pathogens, to include:
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Data sourced from clinicaltrials.gov
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