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Updated May 2026 · ClinicalTrials.gov

RECRUITINGPhase 1INTERVENTIONAL

Safety Study of MucoCept-CVN

Phase 1 Randomized Double-Blind Placebo-Controlled Safety Study of MucoCept-CVN (Lactobacillus Jensenii 1153-1666) Administered Vaginally to Healthy Women

Safety Study of MucoCept-CVN (NCT07181486) is a Phase 1 interventional studying HIV -1 Infection, sponsored by Craig Cohen, MD, MPH. RECRUITING as of the most recent ClinicalTrials.gov update. Talk to your doctor before contacting the trial site.

Important: This information is not medical advice. Talk to your doctor about whether a clinical trial is right for you.

About This Trial

MucoCept-CVN uses a Lactobacillus strain native to the human vagina that is modified into a live biotherapeutic product (LBP) that continuously expresses a potent anti-HIV drug. If research shows that MucoCept-CVN is safe and effective, it could become a self-renewing, female-initiated prevention product for women that promotes vaginal health and provides protection from HIV. The goal of this first-in-human Phase 1 dose-ranging, randomized, placebo-controlled study of MucoCept-CVN is to collect data on safety, colonization, changes to the vaginal microbiota and clearance of the strain with antibiotics. Twelve healthy women will be enrolled and take either one or three doses of MucoCept-CVN or placebo, and a week later will receive antibiotics to clear the Lactobacillus strain. If research shows that MucoCept-CVN is safe and effective, it could become a self-renewing, long-acting, female-initiated prevention product for women that promotes vaginal health and provides protection from HIV.

What Stage of Research Is This?

Phase 1 trials test a new treatment for the first time in humans, focusing on safety, dosing, and how the body processes the drug. For HIV -1 Infection, a Phase 1 study typically enrolls a small number of participants — often healthy volunteers or patients who have exhausted standard treatment options. Phase 1 results determine whether a treatment moves into larger Phase 2 efficacy studies.

This trial is currently recruiting participants. The sponsor has registered the study with ClinicalTrials.gov as actively enrolling, which means new applicants who meet the eligibility criteria can be considered for screening. Trial status can change between updates — confirm current recruiting status with the study contact before traveling for a screening visit.

With a target enrollment of 12 participants, this is a small study — typical of early-phase research, rare-disease trials, or pilot studies designed to generate preliminary signal before a larger study is launched.

Who May Be Eligible (Plain English)

Who May Qualify: 1. Healthy pre-menopausal women 18-45 years of age, inclusive, with regular predictable menstrual cycles 2. Ability to read and consent in English 3. Previous experience of gynecological examinations 4. Consent to participate and adhere to all procedures, including frequent visits at the UCSF Clinical Research Center (CRC) facility for at least 53 days 5. Agree to get tested for STIs and a Pap Smear 6. Agree not to use any other vaginal product during the course of the study, including spermicides 7. Agree to sexual abstinence (no vaginal, anal, and receptive oral intercourse) until the elimination of L. jensenii 1153-1666 is confirmed and for 12 hours prior to the final study visit after clearance is confirmed 8. For participants with male sexual partners: Agree to use two forms of contraception, condoms plus hormonal or permanent method (intrauterine device \[IUD\] or tubal ligation) during vaginal intercourse from the time clearance is established to the Final Visit 30 days after clearance. Use of spermicides is not permitted. 9. For participants with female sexual partners: Agree to use female condoms during intercourse from the time clearance is established to the Final Visit 30 days after clearance. Use of hormonal or permanent method of contraception (IUD or tubal ligation) is not required. 10. Agree to inform their sexual partner about the goals of the study and importance of sexual abstinence (no vaginal, anal, and receptive oral intercourse) and present with their partner at enrollment visit for separate consent procedure for partners Current sexual partners of participants must meet all the following criteria to be enrolled: 1. Ability to read and consent in English 2. Consent to participate and adhere to all procedures for sexual partners should exposure to L. jensenii 1153-1666 be suspected, including multiple visits at the UCSF Clinical Research Center (CRC) ...See full criteria on ClinicalTrials.gov Always talk to your doctor about whether this trial is right for you.

These are translations of the protocol\'s inclusion and exclusion criteria, simplified for patients and caregivers. The original clinical text appears below. Eligibility is ultimately confirmed by the trial site\'s screening process — this summary is a starting point for a conversation with your doctor, not a final determination.

Original Eligibility Criteria

View original clinical language
Inclusion Criteria: 1. Healthy pre-menopausal women 18-45 years of age, inclusive, with regular predictable menstrual cycles 2. Ability to read and consent in English 3. Previous experience of gynecological examinations 4. Consent to participate and adhere to all procedures, including frequent visits at the UCSF Clinical Research Center (CRC) facility for at least 53 days 5. Agree to get tested for STIs and a Pap Smear 6. Agree not to use any other vaginal product during the course of the study, including spermicides 7. Agree to sexual abstinence (no vaginal, anal, and receptive oral intercourse) until the elimination of L. jensenii 1153-1666 is confirmed and for 12 hours prior to the final study visit after clearance is confirmed 8. For participants with male sexual partners: Agree to use two forms of contraception, condoms plus hormonal or permanent method (intrauterine device \[IUD\] or tubal ligation) during vaginal intercourse from the time clearance is established to the Final Visit 30 days after clearance. Use of spermicides is not permitted. 9. For participants with female sexual partners: Agree to use female condoms during intercourse from the time clearance is established to the Final Visit 30 days after clearance. Use of hormonal or permanent method of contraception (IUD or tubal ligation) is not required. 10. Agree to inform their sexual partner about the goals of the study and importance of sexual abstinence (no vaginal, anal, and receptive oral intercourse) and present with their partner at enrollment visit for separate consent procedure for partners Current sexual partners of participants must meet all the following criteria to be enrolled: 1. Ability to read and consent in English 2. Consent to participate and adhere to all procedures for sexual partners should exposure to L. jensenii 1153-1666 be suspected, including multiple visits at the UCSF Clinical Research Center (CRC) 3. Agree to sexual abstinence (no vaginal, anal, and receptive oral intercourse) until the elimination of L. jensenii 1153-1666 is confirmed, and for 12 hours prior to the final study visit after clearance is confirmed Exclusion Criteria: 1. Urogenital infection, including UTI, Trichomonas vaginalis, Neisseria gonorrhoeae, Chlamydia trachomatis, Treponema pallidum, HIV-1/2, BV, or vulvovaginal candidiasis 2. Abnormal Pap smear result 3. Pregnancy or within two months of last pregnancy or lactation 4. Antibiotic or antifungal therapy (vaginal or systemic) within 30 days of enrollment 5. Investigational or immune-suppressive drug use within 30 days of enrollment visit or 10 half-lives, or planned during the study 6. Intrauterine device insertion or removal, pelvic surgery, cervical cryotherapy, cervical laser or loop electrosurgical procedure, abortion, labioplasty within three months prior to enrollment 7. Findings during the pelvic exam at the enrollment visit involving significant deep disruption of the epithelium (e.g., Herpes genitalis lesions) 8. Known allergy to any component used in MucoCept-CVN or clindamycin and azithromycin in participant or sexual partner(s), including azithromycin-associated cholestatic jaundice. 9. History of transplant surgery, cancer, HIV, diabetes or condition that could facilitate the growth of microorganisms 10. Recent history of drug or alcohol abuse 11. Unwillingness to abstain from sexual activity during study by participant or sexual partner(s) 12. If in a sexual relationship, inability to present with their sexual partner before enrollment 13. If in a sexual relationship, having multiple concurrent partners or anonymous partners. 14. Any other condition which the study clinician feels would limit the participant's ability to be an appropriate study subject 15. History of regional enteritis (Crohn's disease), ulcerative colitis, or "antibiotic-associated" colitis For sexual partners of study participants, the following exclusion criteria apply: 1. Known allergy to any component used in MucoCept-CVN or clindamycin and azithromycin, including azithromycin-associated cholestatic jaundice. 2. Having multiple concurrent sex partners or anonymous sex partners. 3. HIV-1/2 infection 4. Any other condition which the study clinician feels would limit the ability of sexual partner(s) to complete the study 5. Co-enrollment in clinical trials testing study drugs

Treatments Being Tested

DRUG

Live Biotherapeutic Product L. jensenii 1153-1666

The vaginally administered MucoCept-CVN contains Lactobacillus jensenii 1153-1666, a natural component of the human vaginal microbiota that has been modified to continuously express the potent HIV entry inhibitor modified-cyanovirin-N (mCV-N) right at the site of infection. MucoCept-CVN is supplied as a prefilled vaginal applicator containing Lactobacillus jensenii 1153-1666, a modified strain of L. jensenii 1153 by integrating a modified cyanovirin-N gene into its chromosome to enhance the strain's ability to inhibit HIV. Each applicator contains 200 mg of MucoCept-CVN powder (1 x 109 CFU), and an inactive preservation matrix.

DRUG

Placebo

Each placebo applicator contains 200 mg of placebo powder comprising the same inactive ingredients of the preservation matrix as the study product.

Locations (1)

Trial sites listed on ClinicalTrials.gov for this study. Site activation status can vary — confirm with the specific site before traveling for a screening visit.

UCSF Zuckerberg San Francisco General Hospital
San Francisco, California, United States

How to Talk to Your Doctor About This Trial

Bring the printable summary of this trial — including the NCT ID (NCT07181486), the sponsor (Craig Cohen, MD, MPH), and the key eligibility criteria — to your next appointment. Your doctor can review the inclusion and exclusion criteria against your medical history, lab values, and current treatments to assess whether you are likely to qualify. They can also help you weigh whether trial participation makes sense alongside your existing care plan.

Useful questions to walk through together: What does the trial protocol require beyond standard care? How long is the active treatment phase, and how long is follow-up? Are there study visits at sites I can reach? Who pays for the trial-specific procedures, and who pays for standard-of-care portions? See our 25 questions to ask about clinical trials guide for a more complete checklist.

Authoritative Sources

The official record for this trial lives on ClinicalTrials.gov — the federal registry maintained by the National Library of Medicine at NIH. For background on how this trial fits into the FDA approval pathway, see the FDA drug approval process. For oncology-specific guidance for patients considering trials, the National Cancer Institute publishes patient-oriented overviews. International trial registries are aggregated by the WHO ICTRP.

Frequently Asked Questions

What is the NCT07181486 clinical trial studying?

MucoCept-CVN uses a Lactobacillus strain native to the human vagina that is modified into a live biotherapeutic product (LBP) that continuously expresses a potent anti-HIV drug. If research shows that MucoCept-CVN is safe and effective, it could become a self-renewing, female-initiated prevention product for women that promotes vaginal health and provides protection from HIV. The goal of this first-in-human Phase 1 dose-ranging, randomized, placebo-controlled study of MucoCept-CVN is to collect data on safety, colonization, changes to the vaginal microbiota and clearance of the strain with an… The full protocol is registered on ClinicalTrials.gov and includes the primary outcome measures, eligibility criteria, and study endpoints.

Who can participate in NCT07181486?

Eligibility for this trial depends on the specific inclusion and exclusion criteria set by the sponsor. The plain-English summary above translates the most important criteria into accessible language; the official clinical text is preserved in the collapsible section underneath. Whether you fit any specific trial is a medical decision your doctor needs to confirm — bring the trial information to your treating physician for a full review against your medical history.

How do I contact the trial site for NCT07181486?

Contact information registered with ClinicalTrials.gov is shown in the sidebar of this page. Before reaching out, confirm with your treating physician that this trial is appropriate for your situation. The trial site will then walk you through the screening process to determine final eligibility.

Is participating in a clinical trial safe?

Clinical trials in the United States are regulated by the FDA and overseen by Institutional Review Boards (IRBs) that review the protocol for safety. Risk varies by trial — Phase 1 studies test new treatments in humans for the first time, while Phase 3 trials use treatments that have already passed earlier safety screening. The informed consent document for any specific trial details the known risks and what to expect. Discuss those risks with your physician before deciding whether to participate.

Where can I verify the data on this page?

Every detail on this page comes directly from the ClinicalTrials.gov API. Click "View on ClinicalTrials.gov" in the sidebar to see the official, unmodified record. The federal record is always authoritative; this page is a structured presentation with a plain-English eligibility translation. For background on how clinical trials are regulated, see the FDA drug approval process documentation.

How This Page Is Built

Every field on this page is pulled directly from the ClinicalTrials.gov API v2 — no estimates, no proxies. The plain-English eligibility translation is generated from the original protocol text and reviewed for fidelity to the underlying clinical criteria. The original clinical text remains visible in the collapsible section above so users and clinicians can verify the translation. Read the full methodology for the data pipeline and known limitations.

Source: ClinicalTrials.gov API v2 record for NCT07181486. Maintained by the National Library of Medicine at NIH. Public domain. Cite as: "TrialFinderData. NCT07181486. Data: ClinicalTrials.gov."

Medical disclaimer: This page is informational, not medical advice. Talk to your doctor about whether a clinical trial is right for you.

Last updated 2026-05-08 · Data from ClinicalTrials.gov.