Neisseria Gonorrhoeae Clinical Trial
Official title:
IGHID 11705 A Randomized, Open-label, Controlled Clinical Trial to Assess the Efficacy of F598 in Preventing an Experimental Urethral Infection With Neisseria Gonorrhoeae in Healthy Male Subjects
Approximately 24 healthy male volunteers between the ages of 18 and 35 years will be enrolled at a single center for a duration of two months for each subject. Subjects who meet the enrollment criteria will be randomized to one of four open-label groups: Control (no treatment) or treatment with F598 at one of three doses. Following F598 administration or assignment to the Control group, subjects must return to the study site for inoculation with N. gonorrhoeae within 2 weeks. Once subjects have been inoculated with N. gonorrhoeae, they will enter the observation phase and will return to the study site daily for up to 5 days. At the end of the observation phase, definitive antibiotic therapy will be administered. A follow-up visit will be conducted 3-5 days after definitive antibiotic and a confirmatory interaction will occur with the subjects 7-10 days after the follow-up to confirm the subject's response. A final visit will occur approximately 8 weeks after inoculation.
The study is comprised of 8 phases:
1. Screening (Visits 1 and 2)
2. F598 administration (Visit 3)
3. Inoculation (Visit 4)
4. Observation (Visits 5 - 8, as needed)
5. Definitive antibiotic treatment (Visit 9)
6. Test of cure (Visit 10)
7. Confirmatory interaction (Visit 11)
8. Final pharmacokinetic (PK)/pharmacodynamic (PD)/anti-drug antibody determination (Visit
12)
For the purposes of standardization, Day 1 of the study will be considered the day of
inoculation.
During the Screening phase, prospective subjects will undergo informed consent and will be
reviewed for their compatibility with the eligibility criteria. Those subjects who meet all
of the Inclusion criteria and none of the Exclusion criteria will be enrolled. Following
enrollment, subjects must undergo a repeat urine screen for C. trachomatis, N. gonorrhoeae
and T. vaginalis (Days -17 to -4).
If the second urine screening test is negative, subjects will enter the F598 administration
phase. Subjects will return to the study site and will be randomized to one of four
open-label groups: Control (no treatment) or treatment with F598 at one of three doses.
Following F598 administration or assignment to the Control group, subjects must return to the
study site for inoculation with N. gonorrhoeae within 2 weeks. Thus, F598 will be
administered on any one of Days -12 to -2.
During the inoculation phase, subjects will return to the study site and receive an inoculum
of N. gonorrhoeae in the anterior urethra. A third and final urine screen for C. trachomatis,
N. gonorrhoeae and T. vaginalis will be obtained immediately before inoculation.
Once subjects have been inoculated with N. gonorrhoeae, they will enter the observation phase
and will return to the study site daily for up to 5 days for a physical examination (in
particular, for evidence of urethral discharge) and a urine sample for evidence of infection
(NAAT and culture) as well as blood for F598 PK/PD and safety labs.
The observation phase will end and definitive antibiotic therapy will be administered when
any one of four criteria is met:
1. The subject requests antibiotic treatment
2. The subject is found to by symptomatic (discharge, urethral discomfort)
3. The subject has reached Day 6 of the study
Thus, depending on the circumstances, definitive antibiotic therapy can be administered
between Days 2 - 6, inclusive.
A follow-up visit at the study site will be conducted 3 - 5 days after definitive antibiotic
therapy has been administered to ensure treatment response. Thus, depending on when the
subject received antibiotics, this visit could occur between Days 5 - 11, inclusive. A
physical examination will be performed and urine for evidence of infection (NAAT) as well as
blood for F598 PK/PD will be obtained.
A confirmatory interaction with the subject will occur at the study site 7 - 10 days after
the follow-up visit to confirm the subject's response and answer any questions the subject
may have. Thus, depending on when the subject had his follow-up visit, the confirmatory visit
could occur between Days 12 - 21, inclusive. Blood for F598 PK/PD, anti-F598 antibodies and
safety labs will be obtained.
A final visit will occur approximately 8 weeks after inoculation (days 52 - 60) to obtain
serum for PK/PD and anti-F598 antibodies.
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