Title

A Phase 1 Study of FOR46 in Patients With Metastatic Castration-Resistant Prostate Cancer (mCRPC)
A Phase 1 Study of FOR46 Administered Every 21 Days in Patients With Metastatic Castration-Resistant Prostate Cancer (mCRPC)
  • Phase

    Phase 1
  • Study Type

    Interventional
  • Status

    Active, not recruiting
  • Indication/Condition

    Prostate Cancer Metastatic
  • Intervention/Treatment

    FOR46
  • Study Participants

    56
This study will test the safety and efficacy of FOR46 given every 21 days to patients with metastatic castration-resistant prostate cancer.

The name of the study drug involved in this study is: FOR46 for Injection (FOR46)
This study is designed to evaluate the safety, tolerability and antitumor activity of FOR46 in patients with metastatic castration-resistant prostate cancer. This study will be conducted in two parts:

Dose escalation:

This part will evaluate increasing doses of FOR46 to identify the maximum tolerated dose (MTD). The first patient enrolled on the study will receive the lowest dose of FOR46. Once this dose is shown to be safe, a second patient will be enrolled at the next higher dose. Patients will continue to be enrolled into either single or multiple patient groups receiving increasing doses until the MTD is reached.

Dose expansion:

This part of the study will further evaluate the safety, tolerability and antitumor activity of FOR46 at a dose shown to be safe in the dose escalation part of the study. Patients will be enrolled into 1 of 2 groups, based on histology.
Study Started
Feb 04
2019
Primary Completion
Jul 31
2022
Anticipated
Study Completion
Oct 31
2022
Anticipated
Last Update
May 11
2022

Drug FOR46

FOR46 is an intravenously (IV) administered antibody-drug conjugate (ADC) directed against CD46

FOR46 (Dose Escalation) Experimental

Eligible patients will receive FOR46 administered as an IV infusion every 21 days. Patients will be enrolled into escalating dose levels during the Dose Escalation period of the study.

FOR46 (Dose Expansion) Experimental

Eligible patients will receive FOR46 administered as an IV infusion every 21 days. Patients will receive the maximum tolerated dose during the Dose Expansion period of the study.

Criteria

Inclusion Criteria:

Male ≥ 18 years of age
Has histologically confirmed prostate cancer that is metastatic and has progressed as defined by PCWG3 criteria during or after treatment with at least 1 ASI (eg, abiraterone, enzalutamide, apalutamide), or another second-generation anti-androgen or cytochrome P450 (CYP)17A1 inhibitor, with the most recent ASI administered in the castration-resistant setting
Has serum testosterone levels < 50 ng/dL during screening. Patients without a history of bilateral orchiectomy are required to remain on luteinizing hormone-releasing hormone (LHRH) analog during the course of protocol therapy
ECOG performance status of 0 or 1
Adequate hematologic, renal and hepatic function
Males with female partners of childbearing potential must agree to use 2 effective methods of contraception
Patients must provide signed informed consent
Patients enrolled into the dose expansion phase must have prostate carcinoma without histologic evidence of small-cell/neuroendocrine carcinoma features on prior biopsy or must have unequivocal histologic evidence of small-cell/neuroendocrine prostate carcinoma (pure or mixed). Patients with treatment-emergent small-cell neuroendocrine cancer (pure or mixed) may have received no more than on prior chemotherapy regimen for mCRPC
Patients enrolled into the dose expansion phase must be willing to undergo a metastatic tumor biopsy or has tissue available from a prior post-castration resistant tumor biopsy

Exclusion Criteria:

Persistent clinically significant toxicities from previous anticancer therapy
Has NCI CTCAE Grade ≥ 2 peripheral neuropathy from any etiology or has a genetic disorder that is associated with peripheral neuropathy even without current neuropathic manifestations
Prior treatment with cytotoxic chemotherapy for mCRPC (chemotherapy in the hormone-sensitive setting is allowed if > 6 months before study entry)
Has received external-beam radiation or systemic anticancer therapy within 14 days before first dose of FOR46
Has received treatment with an investigational drug within 28 days before first dose of FOR46
Has had a major surgical procedure within 28 days before administration of FOR46 dose
Clinically significant cardiovascular disease
Uncontrolled, clinically significant pulmonary disease
Has a history of brain or leptomeningeal metastases.
Uncontrolled intercurrent illness
Has a known positive status for HIV or either active/chronic hepatitis B/C
Requires medications that are strong inhibitors or strong inducers of CYP3A4
[Dose escalation only] Has a history of episodic atrial fibrillation or flutter (patients with chronic atrial fibrillation are not excluded)
No Results Posted