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Phase II Study of Dysplasix™ Intravaginal Suppositories in Patients Patients With High-Risk HPV and Mild Cervical Cytologic Abnormalities

A Phase II, Randomized, Double-blind, Placebo-Controlled, Proof of Concept Study to Assess the Safety and Efficacy of Dysplasix™ Intravaginally-Administered Suppositories in Patients With High-Risk Human Papillomavirus (Hr-HPV) as Determined by HPV Testing, and Accompanied by Either (1) Atypical Squamous Cells of Undetermined Significance (ASC-US) or (2) Low-Grade Squamous Intraepithelial Lesions (LSIL), as Determined by Cytology

Status
Recruiting
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07572396
Enrollment
45
Registered
2026-05-07
Start date
2026-04-30
Completion date
2027-01-27
Last updated
2026-05-14

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

ASC-US, Cervical Abnormalities, High-risk HPV (Any Strain), HPV Infection, LSIL, Low Grade Squamous Intraepithelial Lesion, Uterine Cervical Dysplasia

Keywords

hpv, human papillomavirus, CIN1, LSIL, EGCG, Quinine Sulfate, abnormal Pap, ASCUS, gynecology, precancerous lesions, atypical squamous cells, low grade squamous intraepithelial lesions, Epigallocatechin gallate, women's health, abnormal cytology, cervical cytology

Brief summary

The goal of this clinical trial is to learn if an investigational vaginal suppository therapy works to treat low-grade cervical lesions (ASC-US and LSIL) associated with high-risk human papillomavirus (hr-HPV) infection in women. It will also learn about the safety and tolerability of this investigational therapy. The main questions it aims to answer are: * Does the investigational therapy lead to regression of cervical lesions? * Does the investigational therapy help clear hr-HPV infection? * Do any adverse effects occur from using this medical product? Researchers will compare the investigational therapy to a placebo (a look-alike substance that contains no active drug) to see if the investigational therapy works. Participants will: * Be screened for hr-HPV, cervical abnormalities, and other conditions to be assessed for eligibility * Self-administer 15 doses of the investigational therapy or placebo as a vaginal suppository over 19 calendar days * Attend scheduled clinic visits for examinations, testing, and monitoring for a period of two months * Undergo assessments to evaluate cervical lesion status, hr-HPV infection, and safety outcomes * Keep a daily diary of investigational therapy use and associated information

Detailed description

AMP.2025.001 is a Phase II, Double-Blind, randomized, Placebo-Controlled, Proof-of-Concept study to assess the safety and efficacy of Dysplasix™ Intravaginal Suppositories in females with hr-HPV and one of the following: cytologically confirmed (1) Atypical Squamous Cells of Undetermined Significance (ASC-US) or (2) Low-Grade Squamous Intraepithelial Lesions (LSIL) Participants must undergo both (1) HPV testing and (2) a liquid-based exfoliative cytology test. If, at laboratory screening, high-risk HPV and either (1) ASC-US or (2) LSIL cytologic abnormalities are detected, participants will be eligible for inclusion. If high-grade SIL (HSIL) or glandular abnormalities (AGC-NOS, AGC-N, AIS) are detected, participants will be excluded. Eligible participants with high-risk HPV and either (1) ASC-US or (2) LSIL cytology will be randomized in a 1:1 ratio to Dysplasix™ or a matching Placebo until participants who meet eligibility are enrolled. Suppositories (Dysplasix™) or placebo will be intravaginally self-administered once nightly for a fifteen (15) day course of therapy (3 cycles of 5 days followed by two days off between cycles) applied at night immediately before sleep, beginning shortly after the end of menses. Tolerability of the drug will be recorded in daily participant diaries and assessed at regularly scheduled clinical assessment visits. Participants will undergo complete cervical screening, including hr-HPV testing and cytology 30 (+/- 14) days after completion of treatment in addition to adverse events assessments. Adverse events are evaluated using Common Terminology Criteria for Adverse Events v5.0.

Interventions

DRUGEGCG and Quinine Sulfate Vaginal Suppository

Epigallocatechin gallate + Quinine Sulfate - Dysplasix™ Semisolid Intravaginal suppository 15 doses administered over the span of 3 x 5 consecutive nightly administration of investigational therapy, followed by a two day pause between cycles for a total of 15 doses administered over 19 calendar days. If menses occurs during treatment, investigational product use should be suspended until menses seizes and continued thereafter until 15 doses have been administered.

OTHERPlacebo

Semisolid Intravaginal Suppository 15 doses administered over the span of 3 x 5 consecutive nightly administration of investigational therapy, followed by a two day pause between cycles for a total of 15 doses administered over 19 calendar days. If menses occurs during treatment, investigational product use should be suspended until menses seizes and continued thereafter until 15 doses have been administered.

Sponsors

Amplexd Therapeutics, Inc.
Lead SponsorINDUSTRY
Prince of Wales Hospital, Shatin, Hong Kong
CollaboratorOTHER
Chinese University of Hong Kong
CollaboratorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
QUADRUPLE (Subject, Caregiver, Investigator, Outcomes Assessor)

Eligibility

Sex/Gender
FEMALE
Age
18 Years to 65 Years
Healthy volunteers
No

Inclusion criteria

Participants must meet all the following criteria to be eligible to enroll in the study: 1. Participants capable of giving informed consent 2. Females, ages 18 to 65 years old at the time of signature of the informed consent form. 3. Participants who are able to correctly self-administer the intravaginal suppositories 4. One or more hr-HPV oncotypes as confirmed by HPV test 5. Participants with ASCUS or LSIL abnormalities as confirmed by cytology 6. Immune competent 7. Participants of childbearing potential must have a negative pregnancy test at screening. 8. Participants of childbearing potential must agree to use appropriate contraception or abstain from sexual intercourse for the duration of the study 9. Participants must not have received a recent HPV vaccination and must abstain from HPV vaccination until the end of study

Exclusion criteria

Participants meeting any of the following criteria will be excluded from the study: 1. Presence of HSIL at screening cytology 2. Evidence of glandular abnormalities (AGC/AIS) at screening cytology 3. BMI below 16 4. Pregnant or nursing females 5. Evidence of vaginal/vulval comorbidities, specifically, common sexually transmitted or vaginal infections, and bloodborne pathogens 6. Using a vaginal contraceptive ring 7. History of irregular menstrual cycles or routine intermenstrual bleeding 8. Active autoimmune disease 9. Taking prohibited concomitant medications 10. Concurrent malignancy except for non-melanoma skin lesions 11. Active participation in another clinical trial involving therapeutic intervention (unless ending within 30 days of screening date)

Design outcomes

Primary

MeasureTime frameDescription
To determine and evaluate the safety and tolerability of Dysplasix™ intravaginal suppository therapy in females with hr-HPV and positive cytology for either ASCUS or LSIL.From enrollment until post-end of treatment follow up (Day 50 visit)Number of participants with serious adverse events (SAEs) or dose-limiting toxicities (DLTs) related to the study intervention assessed using relevant Common Terminology Criteria for Adverse Events (CTCAE).
Regression of cervical cytology present at study entryFrom enrollment to post-end of treatment follow-up (Day 50 visit)Participants whose baseline Atypical Cells of Undetermined Significance (ASCUS) or Low-Grade Squamous Intraepithelial Lesions (LSIL) regress to Normal for Intraepithelial Lesions or Malignancies (NILM), 30 days after completion of 15-day course of Dysplasix™ therapy (3 x 5-day cycles), as assessed by cytology
Clearance of hr-HPV genotype present at study entryFrom enrollment to post-end of treatment follow-up (Day 50 visit)Participants whose high-risk human papillomavirus (HPV) genotypes present at study entry become undetectable 30 days after completion of 15-day course of Dysplasix™ therapy (3 x 5-day cycles), as assessed by HPV testing

Countries

Hong Kong

Contacts

CONTACTTrial Manager
p2trialhk@amplexd.com713-933-9640
PRINCIPAL_INVESTIGATORKar Kei Yung, MBBS (HK), MRCOG, FHKCOG, FHKA

Prince of Wales Hospital, Chinese University of Hong Kong

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: May 15, 2026