A Study of TSC-100 and TSC-101 in AML, ALL and MDS in Patients Undergoing Allogeneic Peripheral Blood Stem Transplantation

NCT ID: NCT05473910

Last Updated: 2025-05-18

Basic Information

• Recruitment Status: RECRUITING
• Clinical Phase: PHASE1
• Total Enrollment: 75 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2022-11-01
• Study Completion Date: 2026-06-30

Brief Summary

This is a multi-center, non-randomized, concurrent controlled, multi-arm, Phase 1 interventional, open-label, biologic assignment-based umbrella study evaluating the feasibility, safety and preliminary efficacy of an escalating dose regimen of up to 2 doses of TSC-100 and TSC-101 in patients with AML, MDS, or ALL following HCT from a haploidentical donor, MMUD, or MUD

Detailed Description

A multi-center, non-randomized, controlled, multi-arm, Phase 1 interventional, open label, biologic assignment-based umbrella study is planned to evaluate the feasibility, safety, and preliminary efficacy of repeated dose regimen of TSC-100 and TSC-101 (TSC-100 and TSC-101 is a genetically engineered, donor-derived T cell targeting HA-1 and HA-2 respectively) in patients with AML, MDS, or ALL following HCT from a haploidentical donor, MUD, or MMUD.

The primary objective of this study is to investigate the safety of single and repeated dosing of TSC-100 and TSC-101 in HLA A*02:01 positive patients undergoing haploidentical allogeneic peripheral blood hematopoietic cell transplantation and determine the optimally tolerated dose range. The primary endpoints are: (1) incidence of dose-limiting toxicities (DLTs), and (2) incidence of adverse events (AEs) and serious AEs (SAEs) of TSC-100 and TSC-101 combined with the standard of care (SOC) compared with the SOC alone at 2 years of follow-up. The study will also investigate the efficacy of TSC-100 and TSC-101 combined with the SOC compared with that of the SOC alone to treat the study population and assess the immunogenicity of TSC-100 and TSC-101.

Depending on the HLA type and minor antigen positivity, patients will receive either TSC-100 or TSC-101 combined with the SOC or only SOC. TSC-100 or TSC-101 will be administered intravenously. Standard of care will include reduced intensity conditioning (RIC), hematopoietic cell infusion, and acute graft-versus-host disease (GvHD) prophylaxis. Patients will undergo one of the following RIC regimens, following standard institutional procedures: fludarabine+cyclophosphamide+total body irradiation, fludarabine+melphalan+/-total body irradiation, thiotepa+busulfan+fludarabine or flurdarabine+melphalan+thiotepa. In addition, patients may receive other supportive care measures and infectious prophylaxis as necessary, according to institutional guidelines or standards.

Successive cohorts of patients in the treatment arms will be started according to an interval 3+3 (i3+3) dose escalation design. Once the RP2D is identified, up to 20 additional patients may be enrolled at the RP2D. Dose escalations to the next cohort of TSC-100 and TSC-101 will be considered after the safety review committee (SRC) establishes reasonable safety for all patients enrolled into the current cohort. The safety and necessity of repeat dosing will also be determined by the SRC.

The safety data for all patients that received at least one dose of TSC-100 or TSC-101 in the treatment arms will be included in the safety assessment to proceed to the next dosing level and the dose escalation meeting will occur when the last patient in the cohort completes the 40-day DLT evaluation period. Depending on the number of DLTs observed, the range of patients that could be enrolled in the dose escalation stage of this i3+3 study is 35 to 300, including patients in the control arm.

Conditions

AML; Myelodysplastic Syndromes; ALL, Adult

Study Design

• Allocation Method: NON_RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: TREATMENT
• Blinding Strategy: NONE

Study Groups

TSC-100 Treatment Arm

HA-1 positive patients

Group Type: EXPERIMENTAL

SOC + TSC-100

Intervention Type: DRUG

HA-1 positive

TSC 101 Treatment Arm

HA-1 negative and HA-2 positive patients

Group Type: EXPERIMENTAL

SOC + TSC-101

Intervention Type: DRUG

HA-2 positive or HA-1 negative

Standard of Care or Control arm

Group Type: ACTIVE_COMPARATOR

Control

Intervention Type: OTHER

SOC alone

Interventions

SOC + TSC-100

HA-1 positive

Intervention Type: DRUG

SOC + TSC-101

HA-2 positive or HA-1 negative

Intervention Type: DRUG

Control

SOC alone

Intervention Type: OTHER

Eligibility Criteria

Inclusion Criteria

• Male or female aged ≥ 18 years at the time of signing the informed consent.
• Eastern Cooperative Oncology Group (ECOG)-PS ≤ 2 at the time of the screening visit.
• Contraceptive use by male and female participants must be consistent with local regulations regarding the methods of contraception for those participating in clinical studies.
• Male Participants:
• A male participant must agree to use a highly effective contraceptive as detailed in Appendix 4 of this protocol during the intervention period and for at least 12 months after the last dose of study intervention and refrain from donating sperm during this period.
• Female Participants:
• A female participant is eligible to participate if she is not pregnant, not breastfeeding, and at least one of the following conditions applies:
• Not a woman of childbearing potential (WOCBP) OR
• A WOCBP who agrees to follow the contraceptive guidance during the intervention period and for at least 12 months after the last dose of study intervention.
• Preparing to undergo allogeneic HCT for either of the following:
• AML
• MDS
• ALL
• Participants in the treatment arms must express HLA-A*0201. Participants in the control arm may express any HLA type.
• Having the HA1+/- or HA-1+/+ (HA-1 positive) genotype to be eligible for TSC-100 treatment.
• Having the HA2+/- HA-2+/+ (HA-2 positive) genotype to be eligible for TSC-101 treatment.
• Considered to be clinically indicated for haploidentical donor, MMUD, or MUD transplantation at the discretion of the treating investigator.
• Considered to be clinically indicated for RIC at the discretion of the treating investigator.
• Considered to be clinically indicated for peripheral blood stem cell transplantation at the discretion of the treating investigator.
• Organ function parameters for transplant eligibility are met per institutional standards.
• Capable of giving signed informed consent - which includes compliance with the requirements and restrictions listed in the ICF and in this protocol.
• Participants must provide consent for mandatory study procedures including bone marrow biopsy and blood sampling for research analyses in the ICF.
• Participants must agree to participate in long-term follow-up for up to 15 years post initial product treatment if they are enrolled in the study and receive the investigational Tcell infusion.

• Male or female aged ≥ 18 years at the time of signing the informed consent.
• Able to undergo peripheral blood stem cell (PBSC) collection and up to 2 rounds of leukapheresis (for TSC-100 or TSC101 manufacturing for treatment arms only, and f for stem cell collection for both treatment arms and the control arm).
• Donors matched to TSC-100 participants should be HA-1-/- (negative) and/or negative for all HLA-A*02 alleles
• Donors matched to TSC-101 participants should be negative for all HLA-A*02 alleles
• Capable of giving signed informed consent which includes compliance with the requirements and restrictions listed in the ICF and in this protocol.

• Participants with evidence of clinically significant infection or uncontrolled viral r reactivation of cytomegalovirus (CMV), Epstein-Barr virus (EBV), Adenovirus, BK virus (BKV), or human herpesvirus 6 (HHV-6).
• Participants with active cardiac disease, defined as:
• Uncontrolled or symptomatic angina within the past 3 months.
• History of clinically significant arrhythmias (such as ventricular tachycardia, ventricular fibrillation, torsades de pointes). Atrial fibrillation with controlled ventricular response on treatment is not an exclusion.
• Myocardial infarction < 3 months from study entry.
• Uncontrolled or symptomatic congestive heart failure.
• Prior allogeneic HCT.
• Participants who have a history of hypersensitivity to murine proteins.
• Enrollment on a concomitant trial with a novel investigational agent.
• Use of anti-thymocyte globulin, alemtuzumab, or other in vivo T-cell depleting agents from Day -14 through end of study.

Exclusion Criteria

• Medical or psychological conditions that would make the participant an unsuitable candidate for cell therapy including another concurrent uncontrolled malignancy or active CNS disease.
• The presence of organ toxicities will not necessarily exclude participants from enrolling on the protocol at the discretion of the PI; however, a delay in the infusion of HA1/HA2 TCRT cells may be required at the discretion of the treating investigator
• Participants with levels of donor-specific HLA antibodies that are considered by the treating investigator to be high enough to warrant desensitization protocols and who have no alternate donors.

• Donors for TSC-100 positive for any HLA-A*02 allele would be excluded unless they are HA-1 negative. If donors with any HLA-A*02 allele are considered for patients eligible for TSC-100, the donor would undergo HA-1 testing to ensure that the donor is HA-1 negative (40% probability).
• Donors for TSC-101 positive for any HLA-A*02 allele are excluded regardless of HA- 2 status.
• Donors who test positive for any of the following: HIV-1, HIV-2, human T-lymphotropic virus (HTLV)-1, HTLV-2 seropositive or with active hepatitis B or hepatitis C virus infection, syphilis, West Nile virus through central lab testing. Donors who screen positive for risk of CreutzfeldtJakob disease or Zika virus infection using donor history questionnaires will also be excluded. Donors with evidence of past CMV or EBV infections will be allowed.
• Related donor residing outside of the United States of America (USA). If the donor screening, testing and leukapheresis can be performed at the same site where the participant is being treated, the donor is considered eligible.

• Minimum Eligible Age: 18 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

TScan Therapeutics, Inc.

INDUSTRY

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Principal Investigators

Michelle Matzko, MD

Role: STUDY_DIRECTOR

Tscan Therapeutics

Locations

City of Hope

Duarte, California, United States

Site Status: RECRUITING

Yale

New Haven, Connecticut, United States

Site Status: RECRUITING

Memorial Healthcare System

Hollywood, Florida, United States

Site Status: RECRUITING

Northside Hospital

Atlanta, Georgia, United States

Site Status: RECRUITING

John Hopkins University

Baltimore, Maryland, United States

Site Status: RECRUITING

Mass General Hospital

Boston, Massachusetts, United States

Site Status: RECRUITING

Karmanos Cancer Institute

Detroit, Michigan, United States

Site Status: RECRUITING

Hackensack University Medical Center

Hackensack, New Jersey, United States

Site Status: RECRUITING

Columbia University

New York, New York, United States

Site Status: RECRUITING

Mount Sinai

New York, New York, United States

Site Status: RECRUITING

University North Carolina

Chapel Hill, North Carolina, United States

Site Status: RECRUITING

UPenn

Philadelphia, Pennsylvania, United States

Site Status: RECRUITING

Baylor University Medical Center

Dallas, Texas, United States

Site Status: RECRUITING

MD Anderson

Houston, Texas, United States

Site Status: RECRUITING

Froedert and Medical College of Wisconsin

Milwaukee, Wisconsin, United States

Site Status: RECRUITING

Countries

United States

Central Contacts

Jim Murray

Role: CONTACT

medicalaffairs@tscan.com

8573999500

Facility Contacts

Monzr M Al Malki, MD

Role: primary

Iris Isufi, MD

Role: primary

Hugo Fernandez, MD

Role: primary

Melholm Sohl, MD

Role: primary

Tania Jain, MD

Role: primary

Yi-Bin Chen, MD

Role: primary

Joseph Uberti, MD

Role: primary

Hyung Suh, MD

Role: primary

Ran Reshef, MD

Role: primary

Alla Keyzner, MD

Role: primary

Anson Snow, MD

Role: primary

Saar Gill, MD

Role: primary

Luis Pineiro, MD

Role: primary

Uday Popat, MD

Role: primary

Sameem Abedin, MD

Role: primary

Other Identifiers

TSCAN-001

Identifier Type: -

Identifier Source: org_study_id