A Clinical Study of QLC5508 and/or QLH12016 in Combination With Other Anti-tumor Therapies in Subjects With Advanced Prostate Cancer

NCT ID: NCT07198633

Last Updated: 2025-09-30

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

NOT_YET_RECRUITING

Clinical Phase

PHASE1/PHASE2

Total Enrollment

212 participants

Study Classification

INTERVENTIONAL

Study Start Date

2025-10-31

Study Completion Date

2027-12-31

Brief Summary

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This study is an open-label, multicenter Phase Ib/II clinical trial designed to evaluate the safety, tolerability, pharmacokinetics, and preliminary anti-tumor activity of QLC5508 in combination with NHA (abiraterone or enzalutamide), QLC5508 in combination with QLH12016, QLC5508 in combination with QLH12016 and NHA (abiraterone or enzalutamide), and QLH12016 in combination with NHA (abiraterone or enzalutamide) in subjects with advanced prostate cancer.

The study consists of two stages:

Phase Ib: is the combination dose-escalation stage, during which the recommended Phase II dose (RP2D) will be determined.

Phase II is the efficacy exploration stage, in which, based on the RP2D established in Phase Ib, the therapeutic efficacy will be further evaluated in the target indication.

Detailed Description

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Conditions

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Advanced Prostate Cancer

Study Design

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Allocation Method

NON_RANDOMIZED

Intervention Model

SINGLE_GROUP

Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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QLC5508+NHA

Group Type EXPERIMENTAL

QLC5508

Intervention Type DRUG

B7H3 ADC; QLC5508 will be administered by injection at the dose and dosing frequency specified in the protocol.

abiraterone acetate

Intervention Type DRUG

An oral CYP17 inhibitor; abiraterone acetate will be administered orally at the dose and dosing frequency specified in the protocol

enzalutamide

Intervention Type DRUG

An oral androgen receptor inhibitor; enzalutamide will be administered orally at the dose and dosing frequency specified in the protocol.

QLC5508+QLH12016

Group Type EXPERIMENTAL

QLC5508

Intervention Type DRUG

B7H3 ADC; QLC5508 will be administered by injection at the dose and dosing frequency specified in the protocol.

QLH12016

Intervention Type DRUG

An oral androgen receptor PROTAC; QLH12016 will be administered orally at the dose and dosing frequency specified in the protocol

QLC5508+QLH12016+NHA

Group Type EXPERIMENTAL

QLC5508

Intervention Type DRUG

B7H3 ADC; QLC5508 will be administered by injection at the dose and dosing frequency specified in the protocol.

abiraterone acetate

Intervention Type DRUG

An oral CYP17 inhibitor; abiraterone acetate will be administered orally at the dose and dosing frequency specified in the protocol

enzalutamide

Intervention Type DRUG

An oral androgen receptor inhibitor; enzalutamide will be administered orally at the dose and dosing frequency specified in the protocol.

QLH12016

Intervention Type DRUG

An oral androgen receptor PROTAC; QLH12016 will be administered orally at the dose and dosing frequency specified in the protocol

QLH12016+NHA

Group Type EXPERIMENTAL

QLC5508

Intervention Type DRUG

B7H3 ADC; QLC5508 will be administered by injection at the dose and dosing frequency specified in the protocol.

abiraterone acetate

Intervention Type DRUG

An oral CYP17 inhibitor; abiraterone acetate will be administered orally at the dose and dosing frequency specified in the protocol

enzalutamide

Intervention Type DRUG

An oral androgen receptor inhibitor; enzalutamide will be administered orally at the dose and dosing frequency specified in the protocol.

Interventions

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QLC5508

B7H3 ADC; QLC5508 will be administered by injection at the dose and dosing frequency specified in the protocol.

Intervention Type DRUG

abiraterone acetate

An oral CYP17 inhibitor; abiraterone acetate will be administered orally at the dose and dosing frequency specified in the protocol

Intervention Type DRUG

enzalutamide

An oral androgen receptor inhibitor; enzalutamide will be administered orally at the dose and dosing frequency specified in the protocol.

Intervention Type DRUG

QLH12016

An oral androgen receptor PROTAC; QLH12016 will be administered orally at the dose and dosing frequency specified in the protocol

Intervention Type DRUG

Eligibility Criteria

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Inclusion Criteria

* The subject voluntarily agrees to participate and has signed the informed consent form.
* Male, aged ≥18 years.
* Eastern Cooperative Oncology Group (ECOG) performance status score of 0-1.
* Life expectancy of at least 3 months.
* Histologically or cytologically confirmed adenocarcinoma of the prostate.
* Radiologically confirmed metastatic prostate cancer.
* For subjects with mCRPC, serum testosterone must be at castrate levels, and they must have demonstrated either PSA progression or radiographic progression.
* Must have undergone surgical castration or be willing to receive medical castration.
* For Phase Ib, subjects must have experienced failure, intolerance, or refusal of standard therapy.
* Adequate function of major organs as defined by the protocol.
* Agreement to use effective contraception during the study (except for subjects who have undergone bilateral orchiectomy).
* Sufficient blood samples must be provided during the screening period for genetic mutation testing.

Exclusion Criteria

* Prior treatment with the following agents: AR PROTAC, abiraterone, enzalutamide, or B7H3-targeted therapies.
* Presence of central nervous system (CNS) metastases, leptomeningeal metastases, or spinal cord compression requiring hormonal therapy.
* Receipt of extensive radiotherapy within 4 weeks prior to the first administration of the investigational medicinal product.
* Treatment with other investigational drugs or major surgery within 4 weeks prior to the first administration of the investigational medicinal product.
* Presence of factors that may affect drug administration, intake, or absorption.
* History of epilepsy, or a condition that could provoke seizures within 12 months prior to the first administration of the investigational medicinal product.
* Known history of substance abuse, alcoholism, or drug addiction; or prior history of significant neurological or psychiatric disorders, including dementia or hepatic encephalopathy.
* Presence of severe cardiovascular or cerebrovascular disease.
* Active, uncontrolled infection.
* Clinically uncontrolled third-space fluid accumulation prior to the first administration of the investigational medicinal product.
* History of other malignancies within 5 years prior to the first administration of the investigational medicinal product.
* Presence of moderate to severe pulmonary disease that significantly impairs lung function.
* For subjects receiving QLC5508, history of non-infectious interstitial lung disease (ILD) or pneumonitis.
Minimum Eligible Age

18 Years

Eligible Sex

MALE

Accepts Healthy Volunteers

No

Sponsors

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Qilu Pharmaceutical Co., Ltd.

INDUSTRY

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Central Contacts

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Xin Yao, PHD

Role: CONTACT

18622221103

Other Identifiers

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QLC5508-202

Identifier Type: -

Identifier Source: org_study_id

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