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BXCL701

Phase 2

Metastatic Pancreatic Ductal Adenocarcinoma | Small Molecules | Oncology |BioXcel Therapeutics, Inc.|Trials Updated: Nov 10, 2026

BXCL701 development status

Highest phase Phase 2
Registered trials 3 across 2 sponsors since Apr 2019

BXCL701 target and mechanism

ModalitySmall Molecules

Also known as Talabostat Mesylate, Talabostat

Success Probability

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Market & Valuation

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Trial Design

UNCONTROLLEDDMC
Total Trials2
Total Enrollment119

FDA Designations

No designations recorded

BXCL701 clinical trials

BXCL701 · 2 trials · 4 indications

Phase 2 1Phase 1/2 1
NCT05558982BXCL701 and Pembrolizumab in Patients With Metastatic Pancreatic Ductal AdenocarcinomaMetastatic Pancreatic Ductal Adenocarcinoma
ACTIVE NOT_RECRUITING22 Analytics
PHASE2ACTIVE NOT_RECRUITING
BXCL701 and Pembrolizumab in Patients With Metastatic Pancreatic Ductal Adenocarcinoma
Metastatic Pancreatic Ductal AdenocarcinomaUnlock trial analytics

Study Endpoints

Primary Endpoints

Progression-free survival at 18 weeks
18 weeks
Phase 2a: Composite Response Rate (CRR)
Up to approximately 4 years and 4 months

CRR was defined as the percentage of participants who achieved 1 or more of the following: objective response by Response Evaluation Criteria in Solid Tumors, version 1.1 (RECIST 1.1) criteria; ≥50% decline from baseline in serum Prostate-Specific Antigen (PSA); or Circulating Tumor Cell (CTC) conversion from ≥5/7.5 milliliters (mL) to \<5/7.5 mL per Veridex assay. Objective response rate was defined as the percentage of participants with a confirmed complete response (CR) or partial response (PR) among participants with evaluable lesions by RECIST v1.1. CR=disappearance of all target and non-target lesions and no new lesions. PR = ≥30% decrease in the sum of diameters (SOD) of target lesions compared to baseline and no new non-target lesion.

Phase 2b: Objective Response Rate (ORR)
Up to approximately 4 years and 4 months

The ORR was defined as the percentage of participants with a confirmed CR or PR among participants with evaluable lesions by RECIST v1.1. CR=disappearance of all target and non-target lesions and no new lesions. PR = ≥30% decrease in the sum of the diameters of target lesions compared to baseline and no new non-target lesion.

Secondary Endpoints

Incidence of Adverse events
From start of intervention until 30 days following discontinuation of intervention
Objective response rate
Through study completion, on average 18 weeks
Median Duration of response (DOR)
24 months
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
BXCL701 plus PembrolizumabEXPERIMENTAL -
Phase 1B: Talabostat 0.4 mg QD + Pembrolizumab 200 mgEXPERIMENTALParticipants will receive the combination of talabostat 0.4 mg QD orally on Days 1 to 14 of a 21-day cycle plus pembrolizumab 200 mg IV on Day 1 of each 21-day cycle. There will be a 7-day rest period following the last dose of talabostat and Day 1 of the subsequent cycle.
Phase 1B: Talabostat 0.6 mg QD + Pembrolizumab 200 mgEXPERIMENTALParticipants will receive the combination of talabostat 0.6 mg QD orally on Days 1 to 14 of a 21-day cycle plus pembrolizumab 200 mg IV on Day 1 of each 21-day cycle. There will be a 7-day rest period following the last dose of talabostat and Day 1 of the subsequent cycle.
Phase 1B: Talabostat 0.6 mg TDD + Pembrolizumab 200 mgEXPERIMENTALParticipants will receive the combination of talabostat 0.3 mg twice daily (BID) (at a total daily dose \[TDD\] of 0.6 mg) orally on Days 1 to 14 of a 21-day cycle plus pembrolizumab 200 mg IV on Day 1 of each 21-day cycle. There will be a 7-day rest period following the last dose of talabostat and Day 1 of the subsequent cycle.
Phase 2A (SCNC): Talabostat + Pembrolizumab 200 mgEXPERIMENTALParticipants with SCNC will receive the combination of talabostat 0.6 mg QD orally on Days 1 to 14 a 21-day cycle plus pembrolizumab 200 mg IV on Day 1 of each 21-day cycle. There will be a 7-day rest period following the last dose of talabostat and Day 1 of the subsequent cycle.
Phase 2A (Adenocarcinoma): Talabostat + Pembrolizumab 200 mgEXPERIMENTALParticipants with adenocarcinoma will receive the combination of talabostat 0.6 mg QD orally on Days 1 to 14 a 21-day cycle plus pembrolizumab 200 mg IV on Day 1 of each 21-day cycle. There will be a 7-day rest period following the last dose of talabostat and Day 1 of the subsequent cycle.
Phase 2B (Adenocarcinoma): Talabostat + Pembrolizumab 200 mgEXPERIMENTALParticipants with adenocarcinoma will receive the combination of talabostat 0.6 mg QD orally on Days 1 to 14 a 21-day cycle plus pembrolizumab 200 mg IV on Day 1 of each 21-day cycle. There will be a 7-day rest period following the last dose of talabostat and Day 1 of the subsequent cycle.
Phase 2B (Adenocarcinoma): Talabostat MonotherapyEXPERIMENTALParticipants with adenocarcinoma will receive talabostat 0.6 mg QD orally on Days 1 to 14 a 21-day cycle. There will be a 7-day rest period following the last dose of talabostat and Day 1 of the subsequent cycle.

Interventions

NameTypeDescription
BXCL701DRUGBXCL701 0.3 mg, orally, twice a day on days 1-14 every 21 days
PembrolizumabDRUGPembrolizumab 200 mg intravenous (IV) on day 1 every 21 days.
TalabostatDRUGOral Tablets
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites1

Inclusion Criteria: * Histologically-confirmed pancreatic ductal adenocarcinoma with metastatic disease (mixed histology is acceptable as long adenocarcinoma is the dominant histological subtype) * Patient must consent to two mandatory biopsies and have tumor amenable to serial core biopsies * Meas...

Countries:United StatesUnited Kingdom
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Recent Changes (Last 90 Days)

LOWSep 15, 2026NCT05558982Completion: 2027-11 → 2027-09
LOWSep 15, 2026NCT05558982Completion: 2027-11 → 2027-09
LOWSep 15, 2026NCT05558982Completion: 2027-11 → 2027-09

Frequently asked questions about BXCL701

What is BXCL701 used for?

BXCL701 is being studied for the treatment of metastatic pancreatic ductal adenocarcinoma, a form of pancreatic cancer that has spread beyond the pancreas. It is an investigational small molecule being developed in oncology by BioXcel Therapeutics, Inc. and is not an approved therapy.

Who is developing BXCL701?

BXCL701 is being developed by BioXcel Therapeutics, Inc., which trades under the ticker BTAIQ. The company is advancing the small molecule as an oncology candidate, with its clinical work focused on metastatic pancreatic ductal adenocarcinoma.

What phase is BXCL701 in?

BXCL701 is in Phase 2 clinical development. Its single registered trial is a Phase 2 study in metastatic pancreatic ductal adenocarcinoma. BXCL701 is investigational and is not FDA approved for any use.

What clinical trial is BXCL701 in?

BXCL701 is being evaluated in trial NCT05558982, titled BXCL701 and Pembrolizumab in Patients With Metastatic Pancreatic Ductal Adenocarcinoma. The Phase 2 study is active but not recruiting, is uncontrolled, and is expected to enroll 22 patients aged 18 years and older in the United States.

Is BXCL701 given with pembrolizumab?

Yes. The Phase 2 trial NCT05558982 evaluates BXCL701 in combination with pembrolizumab in patients with metastatic pancreatic ductal adenocarcinoma. The study is an open, uncontrolled design with a planned enrollment of 22 participants and is currently active but not recruiting.

Is BXCL701 approved by the FDA?

No. BXCL701 is an investigational small molecule still in clinical development and has not been approved by the FDA. Its only registered study is a Phase 2 trial in metastatic pancreatic ductal adenocarcinoma that is active but no longer recruiting participants.