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ASP1570

Phase 1

Advanced Solid Tumors | Small molecule | Oncology |Merck & Company, Inc.|Last Updated: May 5, 2026

Success Probability

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Market & Valuation

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Trial Design

CONTROLLEDBiomarker
Total Trials1
Total Enrollment226

FDA Designations

No designations recorded

Clinical trial landscape

ASP1570 · 1 trial · 1 indication

Phase 1 1
NCT05083481A Study of ASP1570 Taken by Itself, or ASP1570 Taken Together With Either Pembrolizumab, Standard Therapies, or Both, in Adults With Solid TumorsAdvanced Solid Tumors
ACTIVE NOT_RECRUITING226 Analytics
PHASE1ACTIVE NOT_RECRUITING
A Study of ASP1570 Taken by Itself, or ASP1570 Taken Together With Either Pembrolizumab, Standard Therapies, or Both, in Adults With Solid Tumors
Advanced Solid TumorsUnlock trial analytics

Study Endpoints

Primary Endpoints

Incidence of Dose Limiting Toxicities (DLTs) for ASP1570 Single Agent
21 days

A DLT is defined as any event meeting the DLT criteria occurring within 21 days of first dose on Cycle 1 Day 1 (C1D1), excluding toxicities clearly related to disease progression or intercurrent illness.

Number of Participants with Adverse Events (AEs)
Up to 27 months

Adverse events (AEs) will be coded using medical dictionary for regulatory activities (MedDRA). An AE is any untoward medical occurrence in a participant temporally associated with the use of study IP, whether or not considered related to the study IP. An AE can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease (new or exacerbated) temporally associated with the use of study IP. This includes events related to the comparator and events related to the (study) procedures.

Change from baseline to 45 days after End of Treatment (EOT) in laboratory values
Baseline and 45 days after EOT

National Cancer Institute Common Terminology Criteria for Adverse Events (NCI-CTCAE) grade changes from baseline to highest post-baseline grade will be assessed.

Number of participants with vital sign abnormalities and/or AEs
Up to 27 months

Number of participants with potentially clinically significant vital sign values.

Number of participants with electrocardiogram (ECG) abnormalities and/or AEs
Up to 24 months

Number of participants with potentially clinically significant ECG values.

Secondary Endpoints

Objective Response Rate (ORR) of ASP1570 per Immune Response Evaluation Criteria in Solid Tumors (iRECIST)
Up to 27 months
ORR of ASP1570 per Response Evaluation Criteria In Solid Tumors 1.1 (RECIST 1.1)
Up to 27 months
Duration of Response (DOR) of ASP1570 per iRECIST
Up to 27 months
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Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
ASP1570 Monotherapy Dose Escalation (Part 1)EXPERIMENTALParticipants will receive daily dose of ASP1570 in a 21-day cycle.
ASP1570 + pembrolizumab Combination therapy Dose Escalation (Part 1)EXPERIMENTALParticipants will receive daily dose of ASP1570 in a 21-day cycle. pembrolizumab will be administered every 6 weeks on day 1 of every other ASP1570 cycle.
ASP1570 + Docetaxel Combination therapy Dose Expansion - NSCLC 2L+ (Part 2)EXPERIMENTALParticipants who have NSCLC will receive RP2D of ASP1570 daily in a 21-day cycle. Docetaxel will be administered every 6 weeks on day 1 of every other ASP1570 cycle.
ASP1570 Monotherapy Dose Expansion - Food Effect (Part 2)EXPERIMENTALParticipants will receive RP2D of ASP1570 after the meal in a 21-day cycle. This cohort will be opened at the discretion of the sponsor.
ASP1570 Monotherapy Dose Expansion - Intermittent dosing (Part 2)EXPERIMENTALParticipants will receive RP2D of ASP1570 with some periodical drug holiday in a 21-day cycle. This cohort will be opened at the discretion of the sponsor.
ASP1570 Monotherapy Dose Expansion - Stepwise dosing (Part 2)EXPERIMENTALParticipants will receive ASP1570 administered by intra-subject dose escalation with gradual multiple dose steps (e.g., 3 steps) and increased dose up to RP2D in a 21-day cycle. This cohort will be opened at the discretion of the sponsor.
ASP1570 Monotherapy Dose Expansion Microsatellite stable - colorectal cancer (MSS-CRC) (Part 2)EXPERIMENTALParticipants who have MSS-CRC will receive ASP1570 in a 21-day cycle.
ASP1570 + TAS-102 + Bevacizumab Combination therapy Dose Expansion - MSS-CRC 3L+ (Part 2)EXPERIMENTALParticipants who have MSS-CRC will receive ASP1570 daily in a 28-day cycle. TAS-102 (Trifluridine + Tipiracil) will be administered on days 1 through 5 and days 8 through 12 of each 28-day cycle. Bevacizumab will be administered every 2 weeks.
ASP1570 Monotherapy Dose Expansion NSCLC (Part 2)EXPERIMENTALParticipants who have NSCLC will receive ASP1570 in a 21-day cycle.
ASP1570 + Pembrolizumab + Pemetrexed + Carboplatin CTDE - NSCLC 1L (Part 2)EXPERIMENTALParticipants who have NSCLC will receive ASP1570 daily in a 21-day cycle. Pembrolizumab will be administered every 6 weeks on day 1 of every other ASP1570 cycle. Pemetrexed and carboplatin will be administered on day 1 of each 21-day cycle. Combination therapy Dose Expansion (CTDE)
ASP1570 + Bevacizumab + mFOLFOX6 or FOLFIRI Combination therapy Dose Expansion - MSS-CRC 2L (Part 2)EXPERIMENTALParticipants who have MSS-CRC will receive ASP1570 in a 14-day cycle. Bevacizumab, will be administered every 2 weeks. mFOLFOX6 (oxaliplatin, Leucovorin, 5-fluorouracil) or FOLFIRI (Leucovorin, 5-Fluorouracil, Irinotecan) will administered every 2 weeks.

Interventions

NameTypeDescription
ASP1570DRUGOral tablet
pembrolizumabDRUGIntravenous Infusion
Trifluridine + TipiracilDRUGOral Administration
BevacizumabDRUGIntravenous Infusion
DocetaxelDRUGIntravenous Infusion
OxaliplatinDRUGIntravenous Infusion
LeucovorinDRUGIntravenous Infusion
5-FluorouracilDRUGIntravenous Infusion
IrinotecanDRUGIntravenous Infusion
PemetrexedDRUGIntravenous Infusion
CarboplatinDRUGIntravenous Infusion
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites30

Inclusion Criteria: * Participant has locally-advanced (unresectable) or metastatic solid tumor malignancy which is confirmed by available pathology records or current biopsy. * Participant has at least 1 measurable lesion per Response Evaluation Criteria in Solid Tumors (RECIST) v1.1. Lesions situ...

Countries:United StatesChinaFranceJapanPuerto RicoSpain
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Competitive Landscape -Other Solid Tumors 9 trials (matched to "Advanced Solid Tumors")

Frequently asked questions about ASP1570

What is ASP1570 used for?

ASP1570 is an investigational small molecule being studied for the treatment of advanced solid tumors. It is currently in Phase 1 clinical development and has not been approved by the FDA. The drug is being evaluated in adults with advanced solid tumors.

What does ASP1570 target?

ASP1570 is a small molecule designed to target a specific molecular pathway involved in tumor growth. However, the exact molecular target has not been disclosed in the available information. The drug is being studied in combination with other therapies for advanced solid tumors.

Who makes ASP1570?

ASP1570 is being developed by Merck & Company, Inc., a pharmaceutical company traded on the New York Stock Exchange under the ticker symbol MRK. The drug is currently in Phase 1 clinical trials for advanced solid tumors.

What phase is ASP1570 in?

ASP1570 is in Phase 1 clinical development. It is an investigational drug and has not been approved by the FDA. The drug is being studied in a single active clinical trial for advanced solid tumors.

What clinical trials is ASP1570 in?

ASP1570 is being studied in one clinical trial with the identifier NCT05083481. This Phase 1 trial is evaluating ASP1570 alone or in combination with pembrolizumab, standard therapies, or both, in adults with advanced solid tumors. The trial is active but not recruiting participants.

Is ASP1570 the same as pembrolizumab?

No, ASP1570 is not the same as pembrolizumab. ASP1570 is an investigational small molecule being developed by Merck & Company, Inc. Pembrolizumab is an immunotherapy drug that targets PD-1. In the clinical trial NCT05083481, ASP1570 is being studied both alone and in combination with pembrolizumab.