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ASP8374

Phase 1

Glioblastoma | Small molecule | Oncology |Regeneron Pharmaceuticals, Inc.|Last Updated: Oct 22, 2025

Success Probability

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Market & Valuation

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Trial Design

RandomizedCONTROLLEDDMCBiomarker
Total Trials1
Total Enrollment14

FDA Designations

No designations recorded

Clinical trial landscape

ASP8374 · 1 trial · 2 indications

Phase 1 1
NCT04826393ASP8374 + Cemiplimab in Recurrent GliomaGlioblastoma
COMPLETED14 Analytics
PHASE1COMPLETED
ASP8374 + Cemiplimab in Recurrent Glioma
GlioblastomaUnlock trial analytics

Study Endpoints

Primary Endpoints

Maxium Tolerated Dose-MTD/ Phase 2 Recommend Dose-RP2D - Cohort 1
Enrollment up to 2 years

primary endpoint for Cohort 1 will be determination of the MTD/RP2D of ASP8374 when administered with cemiplimab among recurrent malignant glioma participants.

CD8+ TIL Tumor Density-Cohort 2
Enrollment up to 2 years

CD8+ TIL density from tumors obtained from participants randomized to the neoadjuvant study arm (2A) will be compared to tumor CD8+ TIL density obtained from control participants enrolled on Arm 2B who do not receive neoadjuvant therapy.

Secondary Endpoints

Rate of Adverse Events
Enrollment up to 2 years
progression-free survival (PFS)
6 months
overall survival (OS).
12 months
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Study Design & Arms

AllocationRANDOMIZED
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
ASP8374 and Cemiplimab-Cohort 1EXPERIMENTALA 3+3 dose escalation design will be used to determine maximum tolerated dose (MTD) or recommended phase 2 dose (RP2D) of ASP8374 when combined with cemiplimab. Participants will receive ASP8374 and Cemiplimab every 3 weeks for up to 2 years. ASP8374 will be available until October 31, 2022. Subjects may continue treatment with cemiplimab alone after that date.
ASP8374 and Cemiplimab-Cohort 2EXPERIMENTALUpon determination of the MTD/RP2D of ASP8374 plus cemiplimab in Cohort 1, a dose expansion will be performed in which eligible participants who are candidates for surgical resection will enroll to Cohort 2 and will be randomized into one of two treatment groups (2A-2B). Group 2A: IV ASP8374 plus cemiplimab within 14± 5 days prior to surgery at the MTD/RP2D established in Cohort 1. Group 2B: No immune checkpoint therapy prior to surgery. Post-operatively, all Cohort 2 participants will receive ASP8374 plus cemiplimab every 3 weeks administered at the MTD/RP2D established by Cohort 1

Interventions

NameTypeDescription
ASP8374DRUGevery 3 weeks by intravenous infusion
cemiplimabDRUGintravenous infusion
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites4

Inclusion Criteria: * Have histologically confirmed WHO grade IV GBM or its variants. Participants will be eligible if the original histology was low-grade glioma and a subsequent histological diagnosis of GBM is made. Participants with WHO grade III recurrent malignant glioma will be allowed to en...

Countries:United States
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Frequently asked questions about ASP8374

What is ASP8374 used for in glioblastoma?

ASP8374 is an investigational small molecule being studied for the treatment of glioblastoma, specifically recurrent glioblastoma. It is currently in Phase 1 clinical development and has not been approved by the FDA.

Who is developing ASP8374?

ASP8374 is being developed by Regeneron Pharmaceuticals, Inc., a biopharmaceutical company traded on NASDAQ under the ticker REGN.

What phase is ASP8374 in?

ASP8374 is in Phase 1 clinical development. A Phase 1 trial has been completed, and the drug remains investigational, meaning it is not yet approved for any use.

What clinical trials is ASP8374 in?

ASP8374 has been studied in a completed Phase 1 trial with the identifier NCT04826393. The trial evaluated ASP8374 in combination with cemiplimab in patients with recurrent glioblastoma and enrolled 14 participants in the United States.

Is ASP8374 the same as cemiplimab?

No, ASP8374 is not the same as cemiplimab. In the clinical trial NCT04826393, ASP8374 was studied in combination with cemiplimab, indicating they are distinct investigational agents.