Study of PYX-201 in Combination With Pembrolizumab in Advanced Solid Tumors

NCT ID: NCT06795412

Last Updated: 2025-10-01

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

RECRUITING

Clinical Phase

PHASE1/PHASE2

Total Enrollment

200 participants

Study Classification

INTERVENTIONAL

Study Start Date

2025-04-15

Study Completion Date

2027-12-06

Brief Summary

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The primary objective of this study is to determine the recommended Phase 2 doses (RP2D(s)) and maximum tolerated dose (MTD) of PYX-201 in combination with pembrolizumab for participants with advanced solid tumors.

Detailed Description

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Conditions

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Advanced Solid Tumours

Study Design

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Allocation Method

NON_RANDOMIZED

Intervention Model

SEQUENTIAL

Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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Part 1: Dose Escalation

Participants will receive escalating doses of PYX-201 to evaluate the safety, tolerability, and preliminary efficacy of PYX-201 in combination with pembrolizumab.

Group Type EXPERIMENTAL

PYX-201

Intervention Type DRUG

Intravenous (IV) infusion.

pembrolizumab

Intervention Type DRUG

IV infusion.

Part 2: Dose Expansion

Part 2 dose-expansion cohorts will be opened based on emerging data to further inform the safety, tolerability, and preliminary efficacy determinations as defined.

Group Type EXPERIMENTAL

PYX-201

Intervention Type DRUG

Intravenous (IV) infusion.

pembrolizumab

Intervention Type DRUG

IV infusion.

Interventions

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PYX-201

Intravenous (IV) infusion.

Intervention Type DRUG

pembrolizumab

IV infusion.

Intervention Type DRUG

Other Intervention Names

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KEYTRUDA®

Eligibility Criteria

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Inclusion Criteria

1. Histologically or cytologically confirmed advanced solid tumors, including first-line (1L) head and neck squamous cell carcinoma (HNSCC), advanced or metastatic triple negative breast cancer (TNBC), hormone receptor positive (HR+) and human epidermal growth factor receptor 2 negative breast cancer (HER2- BC), gastric cancer (GC), cervical cancer, and second-line and higher (2L+) HNSCC.
2. Male or non-pregnant, non-lactating female participants age ≥18 years.
3. Eastern Cooperative Oncology Group Performance Status (ECOG PS) of 0 to 1.
4. Participant must have at least 1 measurable lesion per Response Evaluation Criteria in Solid Tumours (RECIST) v1.1 criteria.
5. Life expectancy of \>3 months, in the opinion of the Investigator.
6. Adequate hematologic function.
7. Adequate hepatic function.
8. Adequate renal function.
9. Adequate coagulation profile.
10. Clinical sites must conduct fresh tumor biopsy or provide participant's archived tumor tissue sample.

Exclusion Criteria

1. Known additional malignancy that is progressing or has required active treatment within the past 2 years.
2. Known active central nervous system (CNS) metastases and/or carcinomatous meningitis.
3. Significant cardiovascular disease within 6 months prior to start of study drug.
4. Evidence of an active systemic bacterial, fungal, or viral infection requiring treatment at the start of study drug.
5. Known active hepatitis B virus (HBV), hepatitis C virus (HCV), human immunodeficiency virus (HIV) or acquired immunodeficiency syndrome (AIDS).
6. Failure to recover to Baseline severity or National Cancer Institute - Common Terminology Criteria for Adverse Events (NCI-CTCAE) v5.0 Grade ≤1 from acute non-hematologic toxicity due to previous therapy, prior to Screening.
7. Participants with active neuropathy of any grade per CTCAE v5.0 at Screening.
8. History of uncontrolled diabetes mellitus.
9. Participants with immunodeficiency or active autoimmune disease that is contraindicated for pembrolizumab.
10. Participants with a history of (noninfectious) pneumonitis/interstitial lung disease (ILD) that required steroids or has current pneumonitis/ILD.
11. Prior solid organ or bone marrow progenitor cell transplantation.
12. Prior high-dose chemotherapy requiring stem cell rescue.
13. Previously received treatment with a programmed death-1 (PD-1)/L1 inhibitor any prior treatment with an agent directed to another stimulatory or co inhibitory T-cell receptor.
14. Severe hypersensitivity (Grade ≥3) to pembrolizumab and/or any of its excipients and/or PYX-201 and/or any of its excipients.
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Merck Sharp & Dohme LLC

INDUSTRY

Sponsor Role collaborator

Pyxis Oncology, Inc

INDUSTRY

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Locations

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University of California San Diego

San Diego, California, United States

Site Status RECRUITING

Sarcoma Oncology Center

Santa Monica, California, United States

Site Status RECRUITING

Moffitt Cancer Center

Tampa, Florida, United States

Site Status RECRUITING

Dana-Farber Cancer Institute

Boston, Massachusetts, United States

Site Status RECRUITING

University of Texas - M.D. Anderson Cancer Center

Houston, Texas, United States

Site Status RECRUITING

NEXT Oncology Houston

Houston, Texas, United States

Site Status RECRUITING

NEXT Virginia

Fairfax, Virginia, United States

Site Status RECRUITING

Countries

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United States

Central Contacts

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Pyxis Oncology Clinical Trial Team

Role: CONTACT

617-453-3596

Other Identifiers

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KEYNOTE-G17

Identifier Type: OTHER

Identifier Source: secondary_id

MK-3475-G17

Identifier Type: OTHER

Identifier Source: secondary_id

PYX-201-102

Identifier Type: -

Identifier Source: org_study_id

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