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TPST-1495 twice daily

Phase 1

Solid Tumor | Small molecule | Oncology |Tempest Therapeutics, Inc.|Trials Updated: Sep 12, 2025

TPST-1495 twice daily development status

Highest phase Phase 1
Registered trials 1 across 1 sponsor since Apr 2020

Success Probability

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Market & Valuation

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Trial Design

CONTROLLEDBiomarker
Total Trials1
Total Enrollment89

FDA Designations

No designations recorded

TPST-1495 twice daily clinical trials

TPST-1495 twice daily · 1 trial · 9 indications

Phase 1 1
NCT04344795Phase 1a/1b Study of TPST-1495 as a Single Agent and in Combination With Pembrolizumab in Subjects With Solid TumorsSolid Tumor
COMPLETED89 Analytics
PHASE1COMPLETED
Phase 1a/1b Study of TPST-1495 as a Single Agent and in Combination With Pembrolizumab in Subjects With Solid Tumors
Solid TumorUnlock trial analytics

Study Endpoints

Primary Endpoints

Determination of maximum tolerated dose and/or recommended Phase 2 dose (RP2D) and optimum dose schedule for TPST-1495 as a single agent and in combination with pembrolizumab
From start of treatment to treatment termination visit, up to 24 months

Determination of maximum tolerated dose and/or recommended Phase 2 dose (RP2D) and optimum dose schedule for TPST-1495 as a single agent and in combination with pembrolizumab based on dose limiting toxicities

Secondary Endpoints

Incidence of adverse events and serious adverse events as assessed by NCI-CTCAE v.5.0
From start of treatment to treatment termination visit, up to 24 months
Assess pharmacokinetics: maximum serum concentration (Cmax)
From start of treatment to treatment termination visit, up to 24 months
Assess pharmacokinetics: area under the serum concentration-time curve (AUC)
From start of treatment to treatment termination visit, up to 24 months
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Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
TPST-1495 monotherapy dose escalationEXPERIMENTALSubjects will receive escalating doses of TPST-1495 administered orally twice daily until maximum tolerated dose is reached or until disease progression
TPST-1495 monotherapy dose and schedule optimizationEXPERIMENTALSubjects will receive alternative TPST-1495 administration schedules until RP2D for the selected schedule is determined or until disease progression.
TPST-1495 monotherapy dose expansionEXPERIMENTALSubjects will receive selected dose regimen from dose and schedule optimization stage until disease progression
TPST-1495 in combination with pembrolizumab dose and schedule optimizationEXPERIMENTALSubjects will receive alternative TPST-1495 administration schedules in combination with pembrolizumab until RP2D for the selected schedule is determined or until disease progression.
TPST-1495 in combination with pembrolizumab dose expansionEXPERIMENTALSubjects will receive selected dose regimen from dose and schedule optimization stage until disease progression

Interventions

NameTypeDescription
TPST-1495 twice dailyDRUGTPST-1495 administered orally twice daily
TPST-1495 once daily or on intermittent scheduleDRUGTPST-1495 administered orally once daily or on intermittent schedule
PembrolizumabDRUGPembrolizumab dosed per label recommendations
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites11

Subjects must meet all the following inclusion criteria to be eligible: 1. Subjects must have a histologically-confirmed malignancy that is metastatic or unresectable for which there is no remaining standard therapy known to confer clinical benefit. While all solid tumor types are eligible for the ...

Countries:United States
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Competitive Landscape -Other Solid Tumors 10 trials (matched to "Solid Tumor")

Frequently asked questions about TPST-1495 twice daily

What is TPST-1495 used for?

TPST-1495 is an investigational small molecule being studied in adults with advanced solid tumors. The Phase 1a/1b trial enrolled patients with colorectal cancer, non small cell lung cancer, squamous cell carcinoma of the head and neck, urothelial carcinoma, endometrial cancer, gastric and gastroesophageal junction adenocarcinoma, and solid tumors with PIK3CA mutations.

What phase is TPST-1495 in?

TPST-1495 is in Phase 1 development. Its single registered trial, NCT04344795, was a Phase 1a/1b study that has been completed. The study enrolled 89 participants and evaluated TPST-1495 both as a single agent and in combination with pembrolizumab in patients with solid tumors.

Who is developing TPST-1495?

TPST-1495 is being developed by Tempest Therapeutics, Inc., which trades on the Nasdaq under the ticker TPST. The company sponsored the Phase 1a/1b trial of the compound in solid tumors.

What clinical trials is TPST-1495 in?

TPST-1495 has been evaluated in one registered clinical trial, NCT04344795, titled a Phase 1a/1b study of TPST-1495 as a single agent and in combination with pembrolizumab in subjects with solid tumors. The trial was conducted in the United States, enrolled 89 adults, and is now completed.

Was the TPST-1495 trial randomized or blinded?

No. The Phase 1a/1b trial of TPST-1495, NCT04344795, was not randomized and was not double blind. It used a controlled design, enrolled 89 participants aged 18 years and older of any sex, and did not include healthy volunteers.

Is TPST-1495 biomarker selected?

Yes. The Phase 1a/1b trial of TPST-1495, NCT04344795, included a biomarker selected population, enrolling patients with solid tumors carrying PIK3CA mutations alongside other advanced solid tumor types such as colorectal, non small cell lung, head and neck, urothelial, endometrial, and gastric cancers.