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RMC-5552

Phase 1

Glioblastoma | Small molecule | Oncology |Revolution Medicines, Inc.|Last Updated: Sep 19, 2025

Target and mechanism

Molecular targetmTORC1/4EBP1
ModalitySmall molecule

Success Probability

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Market & Valuation

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Trial Design

CONTROLLEDDMCBiomarker
Total Trials1
Total Enrollment48

FDA Designations

No designations recorded

Clinical trial landscape

RMC-5552 · 2 trials · 3 indications

Phase 1 2
NCT05557292RMC-5552 Monotherapy in Adult Subjects With Recurrent GlioblastomaGlioblastoma
RECRUITING48 Analytics
NCT04774952Dose Escalation of RMC-5552 Monotherapy in Relapsed/Refractory Solid TumorsSolid Tumors
COMPLETED58 Analytics
PHASE1RECRUITING
RMC-5552 Monotherapy in Adult Subjects With Recurrent Glioblastoma
GlioblastomaUnlock trial analytics
PHASE1COMPLETED
Dose Escalation of RMC-5552 Monotherapy in Relapsed/Refractory Solid Tumors
Solid TumorsUnlock trial analytics

Study Endpoints

Primary Endpoints

Maximum Tolerated Dose (MTD) (Cohort A)
Up to 1 cycle (1 cycle is equal to 21 days)

MTD is defined as the maximal dose at which fewer than one-third of participants experience a dose-limiting toxicity (DLT).

Recommended phase II dose (RP2D) (Cohort A)
Up to 1 cycle (1 cycle is equal to 21 days)

RP2D is defined as the selected dose that will be given to participants in Cohorts B and then C. The RP2D will be either the MTD or one dose level lower based on an analysis of the safety data collected in Cohort A, and discussions between the sponsor-investigator and representatives of RevMed.

Number of Dose-Limiting Toxicities (DLTs) (Cohort A)
Up to 1 cycle (1 cycle is equal to 21 days)

The frequency of adverse events classified by National Cancer Institute Common Terminology Criteria for Adverse Events (CTCAE) version (v)5.0 determined to be DLTs will be reported by dose level.

Frequency of Grade 3 or Higher Adverse Events (Cohort A)
Up to 1 year after enrollment

Adverse events and clinically significant laboratory abnormalities (meeting Grade 3, 4, or 5 criteria according to CTCAE) for participants in Cohort A will be summarized by maximum intensity and relationship to study drug.

Median concentration of RMC-5552 in plasma (Cohort B)
At end of infusion & at time of surgery, 1 day

Median drug levels of RMC-5552 concentration in plasma of participants in Cohort B will be measured on the day of surgery.

Median concentration of RMC-5552 in tumor (Cohort B)
At time of surgery, 1 day

Median drug levels of RMC-5552 in tumor tissue of participants in Cohort B will be measured at time of tumor issue removal/surgical resection. The statistical analysis will be descriptive and will be limited to summary statistics for RMC-5552 concentration in tumor (non-enhancing, enhancing, and border).

Objective Response Rate (ORR) (Cohort C)
Up to 3 years

ORR for participants in Cohort C is defined as the proportion of treated participants with a documented complete response (CR) or partial response (PR) per Response Assessment in Neuro-Oncology (RANO) criteria.

Median Duration of Response (DOR) (Cohort C)
Up to 5 years

DOR is defined as the time of first documented response to trial therapy (PR or better) until the participants in Cohort C demonstrate disease progression per RANO criteria, initiates subsequent anti-cancer therapy, or completes study participation (whichever occurs first). If disease progression is not observed prior to initiating subsequent anti-cancer therapy or completing study participation, the DOR will be censored as the last available disease assessment.

Median Progression-free survival (PFS) (Cohort C)
Up to 5 years

PFS for participants in Cohort C is defined as the time that elapses between cycle 1, day 1 (C1D1) and until the participant experiences disease progression (per RANO criteria), initiates subsequent anti-cancer therapy, completes study participation, or experiences death from any cause (whichever is sooner). If disease progression or death from any cause is not observed prior to initiating subsequent anti-cancer therapy or completing study participation, the PFS will be censored as the last available disease assessment.

Median Overall survival (OS) (Cohort C)
Up to 5 years

OS is defined as the time from C1D1 until the participant completes study follow-up participation, experiences death from any cause or is documented as lost to follow up per institutional standard (whichever is sooner). If death from any cause is not observed prior to completing study participation, the OS will be censored as the time of the last available documentation of survival status.

Number of participants with adverse events (AEs)
up to 3 years

Incidence, nature, and severity of treatment-emergent AEs and serious AEs, including incidence and severity of findings in laboratory values or vital signs for RMC-5552 monotherapy

Number of participants with dose limiting toxicities (DLTs)
21 days

Incidence and nature of DLTs with RMC-5552 monotherapy

Secondary Endpoints

Area under the plasma concentration time curve (AUC) (Cohort A & C)
Pre-dose and end of infusion on Cycle 1 Day 1 and Cycle 1 Day 15 (1 cycle is equal to 21 days)
Median Maximum concentration (Cmax) (Cohort A & C)
Pre-dose and end of infusion on Cycle 1 Day 1 and Cycle 1 Day 15 (1 cycle is equal to 21 days)
Median time to maximum concentration (Tmax) (Cohort A & C)
Pre-dose and end of infusion on Cycle 1 Day 1 and Cycle 1 Day 15 (1 cycle is equal to 21 days)
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Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Cohort A 1(Dose Escalation, Recurrent Non-surgical GBM)EXPERIMENTALParticipants will start at dose level 1 (6 mg) of RMC-5552 administered intravenously. Participants will receive RMC-5552 weekly in 21-day cycles until disease progression or unacceptable toxicity.
Cohort A2 (Dose Escalation, Recurrent Non-surgical GBM)EXPERIMENTALParticipants receive dose level 2 (12 mg) of RMC-5552 administered intravenously if the toxicity profile from participants in dose level 1 (A1) is acceptable. Participants will receive RMC-5552 weekly in 21-day cycles until disease progression or unacceptable toxicity.
Cohort B (Dose Expansion, Recurrent Surgical GBM)EXPERIMENTALParticipants will receive a single dose of RMC-5552 at the RP2D approximately 4 hours prior to participants' scheduled surgical resection as part of standard of care. After recovering from surgery (about 3-6 weeks), participants will continue receiving RMC-5552 weekly in 21-day cycles until disease progression or unacceptable toxicity.
Cohort C (Dose Expansion, Recurrent Non-surgical GBM)EXPERIMENTALParticipants will be given the RP2D of RMC-5552 weekly in 21-day cycles until disease progression or unacceptable toxicity
RMC-5552EXPERIMENTALRMC-5552 for IV administration

Interventions

NameTypeDescription
RMC-5552DRUGGiven IV
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Eligibility Criteria

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

Inclusion Criteria: For Cohort A and C (non-surgical): 1. Participants must have histologically or cytologically confirmed 1st, 2nd or 3rd recurrence GBM that has recurred or progressed (per standard RANO criteria) after standard treatment regimen (surgery and radiotherapy with or without chemothe...

Countries:United States
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Frequently asked questions about RMC-5552

What is RMC-5552 used for?

RMC-5552 is an investigational small molecule being studied for the treatment of solid tumors and recurrent glioblastoma. It is currently in Phase 1 clinical development for these oncology indications.

What does RMC-5552 target?

RMC-5552 targets mTORC1 and 4EBP1, which are involved in cell growth and protein synthesis pathways. By inhibiting these targets, the drug aims to disrupt cancer cell proliferation.

Who is developing RMC-5552?

RMC-5552 is being developed by Revolution Medicines, Inc., a biopharmaceutical company traded on the NASDAQ under the ticker symbol RVMD.

What phase is RMC-5552 in?

RMC-5552 is in Phase 1 clinical development. It is an investigational drug and has not been approved by the FDA for any use.

What clinical trials is RMC-5552 in?

RMC-5552 is being studied in two Phase 1 trials. NCT04774952 is a completed dose escalation study in relapsed or refractory solid tumors with 58 participants. NCT05557292 is an ongoing study in recurrent glioblastoma with a target enrollment of 48 participants.

Is RMC-5552 the same as other names?

RMC-5552 is also known by its alternative name, RMC-5552. No other alternative names have been reported for this drug.