Multicenter Prospective Non-randomized Controlled Study of ALA-PDT for LSIL With HPV16/18 Infection (PDT for LSIL)

December 14, 2025 updated by: Second Affiliated Hospital, School of Medicine, Zhejiang University

Multicenter Prospective Non-randomized Controlled Study of Ella Photodynamic Therapy for Cervical Low-grade Squamous Intraepithelial Lesions With HPV16/18 Infection

This multicenter, prospective trial assesses ALA-PDT versus observation for efficacy and safety in treating cervical LSIL with HPV16/18 infection.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Not yet recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

This study is a multicenter, prospective, concurrent, non-randomized controlled clinical trial designed to evaluate the clinical efficacy of ALA-PDT treatment compared with observation and follow-up in patients with cervical low-grade squamous intraepithelial lesion (LSIL) associated with HPV16/18 infection. The primary outcome is the cervical lesion reversal rate. Secondary outcomes include HPV16/18 clearance rate and time to clearance, as well as improvements in cervical ectropion and vaginal microenvironment. Additionally, lesion progression rate and recurrence rate will be monitored in both groups. Safety, tolerability, patient-reported quality of life, and treatment satisfaction are also assessed.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
225

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Contact Backup

  • Name: Jianwei Zhou, Professor

Study Locations

  • China
    • Zhejiang
      • Hangzhou, Zhejiang, China, 310000
        • Women's Hospital School Of Medicine Zhejiang University
        • Contact:
      • Hangzhou, Zhejiang, China
        • First People's Hospital of Hangzhou
        • Contact:
          • Hongkai Shang, Doctor
          • Phone Number: 15990032799
      • Hangzhou, Zhejiang, China
        • Hangzhou Linping District first People's Hospital
        • Contact:
      • Ningbo, Zhejiang, China, 310000
        • First Affiliated Hospital of Ningbo University
        • Contact:
      • Shaoxing, Zhejiang, China, 310000
        • Shaoxing people's Hospital
        • Contact:

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Adult

Accepts Healthy Volunteers

Yes

Description

Inclusion Criteria:

  1. Female, 20-60 years, understands study procedures and consents to participate;
  2. HPV 16 or 18 positive;
  3. Colposcopy-guided cervical biopsy within 3 months showing LSIL;
  4. Provides written informed consent.

Exclusion Criteria:

  1. Cytology showing ASC-H, HSIL, AGC, or AIS; or evidence of malignant cells on cytology/histology, or suspicion of malignancy or invasive cancer;
  2. Colposcopy findings suggestive of invasive cancer or lesion extension to the vaginal wall;
  3. Severe pelvic, cervical, or other gynecological inflammatory conditions identified clinically;
  4. Undiagnosed vaginal bleeding;
  5. Active allergic disease, porphyria, or history of allergy to the study drug or structurally similar agents;
  6. Severe cardiovascular, neurological, psychiatric, endocrine, hepatic, or hematologic disorders; known immunodeficiency; long-term glucocorticoid or immunosuppressant use; active autoimmune disease; or other malignancies;
  7. Pregnant or breastfeeding women;
  8. History of hysterectomy, cervical cancer treatment, or cervical excision/ablation within 6 months (e.g., conization, LEEP, laser);
  9. Use of interferon or antiviral therapy within 3 months;
  10. Any other condition deemed unsuitable for participation by the investigator.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Non-Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: ALA-PDT Group
ALA-PDT administered every 7-14 days for a total of 3-6 sessions.
Procedure: ALA-PDT
Photosensitizer is applied to the cervical canal and cervix, followed by light irradiation, repeated every 7-14 days for 3-6 sessions.
No Intervention: Observation Group
Observation and follow-up

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Cervical lesion regression rate
Time Frame: 6 months
Proportion of patients with normal histopathology on colposcopy-guided biopsy or NILM cytology, plus negative HPV test, at 6 months post-treatment.
6 months

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
HPV clearance rate
Time Frame: 2 years
HPV clearance rates at 3, 6, 9, 12, and 24 months post-treatment
2 years
Cervical lesion regression rate
Time Frame: 2 years
Proportion of patients with normal colposcopy-guided cervical biopsy histopathology, or NILM cytology plus negative HPV test, at 12 and 24 months.
2 years

Other Outcome Measures

Other Outcome Measures

For clinical trials, a planned measurement described in the protocol that is used to determine the effect of an intervention/treatment on participants. For observational studies, a measurement or observation that is used to describe patterns of diseases or traits, or associations with exposures, risk factors, or treatment. Types of outcome measures include primary outcome measure and secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Adverse events
Time Frame: 2 years
Record post-treatment bleeding, pain, and photosensitivity.
2 years

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Second Affiliated Hospital, School of Medicine, Zhejiang University

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
First People's Hospital of Hangzhou
Women's Hospital School Of Medicine Zhejiang University
Shaoxing People's Hospital
Linping First People's Hospital
First Affiliated Hospital of Ningbo University

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Estimated)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
January 1, 2026

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
January 1, 2027

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
December 1, 2027

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
December 14, 2025

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
December 14, 2025

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
December 29, 2025

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
December 29, 2025

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
December 14, 2025

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
December 1, 2025

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • 2025-1380

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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