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First-In-Human Study of STX-721 in Participants With Locally Advanced or Metastatic Non-Small Cell Lung Cancer Harboring EGFR Exon 20 Insertion Mutations

S

Scorpion Therapeutics

Status and phase

Enrolling
Phase 2
Phase 1

Conditions

EGFR/HER2 Exon 20 Insertion Mutation
NSCLC
Non-Small Cell Lung Cancer

Treatments

Drug: STX-721 (2 doses)
Drug: STX-721 (Escalated)
Drug: STX-721 (RP2D)

Study type

Interventional

Funder types

Industry

Identifiers

NCT06043817
STX-721-101

Details and patient eligibility

About

Study STX-721-101 is an open label, Phase 1/2 study evaluating the safety, tolerability, pharmacokinetic (PK) exposure, and preliminary antitumor activity of STX-721 in participants with non-small cell lung cancer (NSCLC) carrying EGFR/HER2 exon 20 insertion (ex20ins) mutations.

Enrollment

120 estimated patients

Sex

All

Ages

18+ years old

Volunteers

No Healthy Volunteers

Inclusion and exclusion criteria

Key Inclusion Criteria:

  1. Has histologically- or cytologically confirmed diagnosis of NSCLC Stage IIIB/C or IV not eligible for curative intent surgery or chemoradiation.
  2. Tumor tissue EGFR exon 20 insertion mutations confirmed by qualified local laboratories.
  3. Has new or recent tumor biopsy (collected at screening, if feasible) or archival tumor specimen collected in the past 10 years available for genomic profiling (see lab manual for minimum tissue requirements).
  4. Is ≥18 years of age at the time of signing the ICF.
  5. Has Eastern Cooperative Oncology Group (ECOG) performance status score of 0 or 1.

Key Exclusion Criteria:

  1. Has a tumor that is known to harbor concurrent T790M and C797S resistance mutations.
  2. Has history (within ≤2 years before screening) of solid tumor or hematological malignancy that is histologically distinct from NSCLC.
  3. Has symptomatic brain or spinal metastases.
  4. Has toxicities from previous anticancer therapies that have not resolved to baseline levels or to CTCAE Grade ≤1, except for alopecia and peripheral neuropathy.
  5. Has any condition for which, in the opinion of the investigator, participation would not be in the best interest of the participant (e.g., could compromise the participant's well-being) or would prevent, limit, or confound the protocol-specified assessments.

Trial design

Primary purpose

Treatment

Allocation

Non-Randomized

Interventional model

Sequential Assignment

Masking

None (Open label)

120 participants in 3 patient groups

Part 1: Dose Escalation
Experimental group
Treatment:
Drug: STX-721 (Escalated)
Part 2: RP2D Selection
Experimental group
Treatment:
Drug: STX-721 (2 doses)
Part 3: Dose Expansion
Experimental group
Treatment:
Drug: STX-721 (RP2D)

Trial contacts and locations

15

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Central trial contact

For questions concerning enrollment

Data sourced from clinicaltrials.gov

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