Safety Study of Anti-Influenza Virus Monoclonal Antibody to Treat Influenza

Phase 1 Study of TCN-032 (Human Monoclonal Antibody Directed Against the M2 Protein of Influenza A Virus) in Healthy Adult Volunteers

The purpose of this study is to compare the safety profile in healthy volunteers of a single intravenous administration of TCN-032 as compared with placebo.

Influenza is a highly communicable acute respiratory disease that is considered to be one of the major infectious disease threats to the human population. Annual vaccination is generally effective only against those strains included in the vaccine. Because of the frequent emergence of divergent variants and the periodic emergence of strains with novel hemagglutinin and/or neuraminidase surface proteins that can result in global pandemics, the availability of potent antiviral agents for the prevention and/or treatment of influenza remains an urgent clinical and public health priority.

TCN-032 is a human monoclonal antibody that specifically binds to a conserved epitope of the amino-terminal extracellular domain (M2e) of the influenza virus matrix protein 2 (M2). The drug is intended for use as an antiviral agent for the treatment of disease caused by type A influenza viruses. Treatments within the study will consist of single ascending dose-escalation ranging from 1 to 40 mg/kg.

Safety will be assessed by physical examinations, vital signs, serial electrocardiograms and clinical laboratory tests (hematology, chemistry and urinalysis). A clinically significant laboratory value will be any abnormal result that is an unexpected or unexplained laboratory value or change in value from the patient's prior values. AEs will be reported by severity and relatedness to study treatment and classified according to MedDRA

PK evaluation of TCN-032 plasma concentrations will include: tmax (time at which maximum concentration is observed),Cmax (maximum observed concentration), t1/2 (terminal-elimination half-life), CL (clearance), Vd (volume of distribution).

Immunogenicity will be assessed based on induction of TCN-032 anti-drug antibodies. Baseline and serial post-treatment serum measures of anti-TCN-032 antibodies will be detected by immunoassay and summarized by dose and time point with means, standard deviations, medians, quartiles, and ranges. Change from baseline in anti-TCN-032 antibody levels will be similarly analyzed.

Inclusion Criteria: Healthy volunteers Normal lab tests Exclusion Criteria: Prior treatment with a monoclonal antibody

Grandea AG 3rd, Olsen OA, Cox TC, Renshaw M, Hammond PW, Chan-Hui PY, Mitcham JL, Cieplak W, Stewart SM, Grantham ML, Pekosz A, Kiso M, Shinya K, Hatta M, Kawaoka Y, Moyle M. Human antibodies reveal a protective epitope that is highly conserved among human and nonhuman influenza A viruses. Proc Natl Acad Sci U S A. 2010 Jul 13;107(28):12658-63. doi: 10.1073/pnas.0911806107. Epub 2010 Jul 1.