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SIM0505

Phase 1

Advanced Solid Tumors | Small molecule | Oncology |NextCure, Inc.|Last Updated: Aug 17, 2026

Target and mechanism

Molecular targetCDH6
Target classProtein
ModalitySmall molecule

Also known as SIM0505 for injection

Success Probability

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Market & Valuation

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Trial Design

RandomizedCONTROLLED
Total Trials1
Total Enrollment738

FDA Designations

FAST_TRACK

Clinical trial landscape

SIM0505 · 1 trial · 8 indications

Phase 1 1
NCT06792552A Phase I Study of SIM0505 in Participants With Advanced Solid TumorsAdvanced Solid Tumors
RECRUITING738 Analytics
PHASE1RECRUITING
A Phase I Study of SIM0505 in Participants With Advanced Solid Tumors
Advanced Solid TumorsUnlock trial analytics

Study Endpoints

Primary Endpoints

dose escalation: Dose-limiting toxicity (DLT)
At the end of Cycle 1 (each cycle is 21 days)
dose escalation & optimization: Adverse events (AEs)
the whole dose escalation phase,an average of 2 year
dose optimization:Objective response rate (ORR)
the whole dose optimization phase,an average of 1.5 year
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Study Design & Arms

AllocationRANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
SIM0505 mono dose escalationEXPERIMENTALEvery 21 days is one cycle. Multiple dose levels of SIM0505 will be explored in dose escalation, and determine the maximum tolerated dose.
SIM0505 mono dose optimization - PROCEXPERIMENTALEvery 21 days is one cycle. 2-3 dose levels of SIM0505 will be explored in dose optimization, and determine the recommended dose (RD) of SIM0505 and evaluate the preliminary anti-tumor activity of SIM0505 in PROC.
SIM0505 mono dose optimization - RCCEXPERIMENTALEvery 21 days is one cycle. 2 dose levels of SIM0505 will be explored in dose optimization, and determine the recommended dose (RD) of SIM0505 and evaluate the preliminary anti-tumor activity of SIM0505 in RCC.
SIM0505 mono dose optimization - USCEXPERIMENTALEvery 21 days is one cycle. 2 dose levels of SIM0505 will be explored in dose optimization, and determine the recommended dose (RD) of SIM0505 and evaluate the preliminary anti-tumor activity of SIM0505 in USC.
SIM0505 mono dose optimization - NSCLCEXPERIMENTALEvery 21 days is one cycle. 2 dose levels of SIM0505 will be explored in dose optimization, and determine the recommended dose (RD) of SIM0505 and evaluate the preliminary anti-tumor activity of SIM0505 in NSCLC.

Interventions

NameTypeDescription
SIM0505 for injectionDRUGEvery 21 days is one cycle. Multiple dose levels of SIM0505 will be explored in dose escalation, and determine the maximum tolerated dose.
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites17

Inclusion Criteria: 1. Written informed consent is obtained prior to any procedures that are not considered standard of care. 2. ≥18 years of age. 3. In Part 1: 1. Participants with histologically or cytologically confirmed advanced solid tumors, who have failed or are ineligible for standard o...

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

Recent Changes (Last 90 Days)

LOWAug 17, 2026NCT06792552lastUpdatePostDate: changed
LOWAug 17, 2026NCT06792552lastUpdatePostDate: changed
LOWJul 28, 2026NCT06792552Enrollment: 414 → 738
LOWJul 28, 2026NCT06792552Enrollment: 414 → 738

Frequently asked questions about SIM0505

What is SIM0505 used for in advanced solid tumors?

SIM0505 is an investigational small molecule being developed for the treatment of advanced solid tumors, including platinum-resistant ovarian cancer, fallopian tube cancer, renal cell carcinoma, papillary renal cell carcinoma, uterine serous carcinoma, non-small cell lung cancer, and primary peritoneal cancer. It is currently in Phase 1 clinical development.

What does SIM0505 target?

SIM0505 targets CDH6, a protein involved in cell adhesion. By targeting CDH6, the drug is designed to interfere with tumor cell survival and growth in certain solid tumors. This mechanism is being evaluated in an ongoing Phase 1 clinical trial.

Who makes SIM0505?

SIM0505 is being developed by NextCure, Inc., a biopharmaceutical company traded on NASDAQ under the ticker symbol NXTC. The company is conducting a Phase 1 clinical trial of SIM0505 in participants with advanced solid tumors.

What phase is SIM0505 in?

SIM0505 is in Phase 1 clinical development. It is an investigational drug and has not been approved by the FDA. The drug has received Fast Track designation from the FDA, which is intended to expedite the development and review of therapies for serious conditions.

What clinical trials is SIM0505 in?

SIM0505 is being studied in a Phase 1 clinical trial with the identifier NCT06792552, titled "A Phase I Study of SIM0505 in Participants With Advanced Solid Tumors." The trial is currently recruiting participants in the United States and China, with an estimated enrollment of 738 patients.

Is SIM0505 the same as SIM0505 for injection?

Yes, SIM0505 is also known as SIM0505 for injection. Both names refer to the same investigational drug being developed by NextCure, Inc. for the treatment of advanced solid tumors. The drug is administered via injection and is currently in Phase 1 clinical trials.