A Phase I Single-Blind randomised trial investigating immunisation strategies using Ad4-EnvCN54, MVA-CN54 and CN54gp140/MPLA combinations in order to maximise antibody responses to Human Immunodeficiency Virus
This is a randomised two-part Phase I study which will explore the impact of different boosting options (MVA-CN54 and recombinant CN54gp140 protein) for oral Adenovirus serotype 4 vector prime expressing HIV-1 CN54 envelope (Ad4-EnvCN54) designed to optimize systemic and mucosal antibody responses. Part 1 is exploratory and designed to select conditions capable of promoting enhanced systemic and mucosal B cell responses in a limited number of participants. Part 2 is dependent upon Part 1 and is designed to study groups selected on performance in part 1 in an expanded number of subjects. Data from both stages will be combined for safety and immunological analyses.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
PREVENTION
Masking
SINGLE
Enrollment
68
Live, replication-competent adenovirus 4 vector, engineered to express the envelope glycoprotein of HIV-1 isolate 97CN54
Live, non-replicating modified vaccinia Ankara vector, engineered to express the envelope glycoprotein of HIV-1 isolate 97CN54
Recombinant glycoprotein of HIV-1 isolate 97CN54, with liposomal monophosphoryl lipid A adjuvant
NIHR Imperial Clinical Research Facility
London, United Kingdom
Number of Participants With Mucosal Binding IgG Antibodies to HIV CN54gp140 Antigen
Number of participants with mucosal (semen, nasal, vaginal or rectal) binding IgG antibodies to HIV CN54gp140 antigen, as determined by ELISA
Time frame: At two weeks after the final immunisation
Number of Participants With Severe or Greater (Grades 3-4) Adverse Reactions During the Study
Number of Participants With Severe or Greater (Grades 3-4) Adverse Reactions up to twenty-four weeks after the final immunisation
Time frame: Up to twenty-four weeks after the final immunisation
Median Concentration of CN54-gp140 Specific IgG Binding Antibodies
Median concentration of CN54-gp140 specific IgG binding antibodies, as measured by ELISA. Concentration is in ng/mL
Time frame: At two weeks after the final immunisation
Number of Participants With Detectable Serum Binding Antibodies to HIV CN54gp140 Antigen
Number of participants with detectable serum binding antibodies to HIV CN54gp140 antigen, as measured by IgG binding ELISA
Time frame: At two weeks post-final immunisation
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