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Dabogratinib

Phase 2

Achondroplasia | Small molecule | Rare Disease |Tyra Biosciences, Inc.|Trials Updated: Nov 2, 2026

Dabogratinib target and mechanism

Molecular targetFGFR3
Target class-Tinib (Kinase)
ModalitySmall molecule

Also known as TYRA-300

Success Probability

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Market & Valuation

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Trial Design

CONTROLLEDDMC
Total Trials4
Total Enrollment777

FDA Designations

No designations recorded

Dabogratinib clinical trials

Dabogratinib · 4 trials · 20 indications

Phase 2 3Phase 1 1
NCT07265947Phase 2A/B Efficacy and Safety of Dabogratinib in Participants With Low Grade Upper Tract Urothelial CarcinomaLow Grade Upper Tract Urothelial Carcinoma
RECRUITING285 Analytics
NCT06995677Efficacy and Safety of TYRA-300 in Participants With FGFR3 Altered Low Grade, Intermediate Risk Non-Muscle Invasive Bladder CancerLow-grade NMIBC
RECRUITING90 Analytics
NCT06842355A Study of TYRA-300 in Children With Achondroplasia: BEACH301Achondroplasia
RECRUITING92 Analytics
PHASE2RECRUITING
Phase 2A/B Efficacy and Safety of Dabogratinib in Participants With Low Grade Upper Tract Urothelial Carcinoma
Low Grade Upper Tract Urothelial CarcinomaUnlock trial analytics
PHASE2RECRUITING
Efficacy and Safety of TYRA-300 in Participants With FGFR3 Altered Low Grade, Intermediate Risk Non-Muscle Invasive Bladder Cancer
Low-grade NMIBCUnlock trial analytics
PHASE2RECRUITING
A Study of TYRA-300 in Children With Achondroplasia: BEACH301
AchondroplasiaUnlock trial analytics

Study Endpoints

Primary Endpoints

To assess the efficacy of Dabogratinib in LG UTUC FGFR3+ participants (proportion of participants with a CR within 6 months out of all LG UTUC FGFR3+ participants)
within 6 months

Complete response (CR) rate

To assess the efficacy of TYRA-300 in LG IR-NMIBC participants
at 3 months

Complete response (CR) rate at 3 months

Incidence of treatment-related adverse events as assessed by CTCAE v5.0
Up to 12 months
Change from baseline in annualized growth velocity (Cohort 1)
12 months
Phase 1 Part A: To determine the maximum tolerated doses (MTD).
Initiation of study treatment through 28 days.
Phase 1 Part B: To determine the recommended Phase 2 dose (R2PD).
Initiation of study treatment through 28 days (up to approximately 18 months).
Phase 2: Overall Response Rate (ORR), defined by RECIST v1.1.
Initiation of study treatment until disease progression, death, unacceptable toxicity, or withdrawal (up to 2 years).

Secondary Endpoints

To assess the efficacy of Dabogratinib in LG UTUC in all participants (proportion of participants with a CR within 6 months out of all LG UTUC participants)
at 6 months
Duration of Response (DOR)(median time for CR duration in those participants who achieve a CR)
up to 36 months
Complete Response (proportion of participants who continue to have a CR at 12 and 24 months)
at 12 and 24 months
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Study Design & Arms

AllocationRANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Study Drug Dose Cohort A (DCA) 60mgEXPERIMENTALDabogratinib (TYRA-300) monotherapy in Participants
Study Drug Dose Cohort B (DCB) 80mgEXPERIMENTALDabogratinib (TYRA-300) monotherapy in Participants
Dose Cohort A (DCA)EXPERIMENTALTYRA-300 monotherapy in Participants with FGFR3 Altered Low Grade, Intermediate Risk Non-Muscle Invasive Bladder Cancer
Dose Cohort B (DCB)EXPERIMENTALTYRA-300 monotherapy in Participants with FGFR3 Altered Low Grade, Intermediate Risk Non-Muscle Invasive Bladder Cancer
Possible Dose Cohort C (DCC)EXPERIMENTALTYRA-300 monotherapy in Participants with FGFR3 Altered Low Grade, Intermediate Risk Non-Muscle Invasive Bladder Cancer
TYRA-300 0.125 mg/kgEXPERIMENTALTYRA-300 is provided as sprinkle capsules/mini-tablets. The total dose will be calculated based on the participant's weight. Weight adjustments will be made every 3 months.
TYRA-300 0.25 mg/kgEXPERIMENTALTYRA-300 is provided as sprinkle capsules/mini-tablets. The total dose will be calculated based on the participant's weight. Weight adjustments will be made every 3 months.
TYRA-300 0.375 mg/kgEXPERIMENTALTYRA-300 is provided as sprinkle capsules/mini-tablets. The total dose will be calculated based on the participant's weight. Weight adjustments will be made every 3 months.
TYRA-300 0.50 mg/kgEXPERIMENTALTYRA-300 is provided as sprinkle capsules/mini-tablets. The total dose will be calculated based on the participant's weight. Weight adjustments will be made every 3 months.
TYRA-300 0.625 mg/kgEXPERIMENTALTYRA-300 is provided as sprinkle capsules/mini-tablets. The total dose will be calculated based on the participant's weight. Weight adjustments will be made every 3 months.
Phase 1 Part A - dose escalationEXPERIMENTALTYRA-300 taken once daily by mouth in 28-day cycles starting at 10 mg daily.
Phase 1 Part B - dose expansionEXPERIMENTALTYRA-300 taken once or twice daily by mouth in 28-day cycles.
Phase 2EXPERIMENTALTYRA-300 taken once or twice daily by mouth in 28-day cycles at doses determined during Phase 1.

Interventions

NameTypeDescription
Dabogratinib (TYRA-300) 60mgDRUGSelf-administered 60mg dose Oral tablet(s) given daily
Dabogratinib (TYRA-300) 80mgDRUGSelf-administered 80mg dose Oral tablet(s) given daily
TYRA-300 60mgDRUGSelf-administered 60mg dose Oral tablet(s) given daily
TYRA-300 50mgDRUGSelf-administered 50mg dose Oral tablet(s) given daily
TYRA-300 Dose 70 mgDRUGSelf-administered 70 mg Oral tablet(s) given daily
TYRA-300 0.125 mg/kgDRUGInitial dose level of TYRA-300 per protocol, subsequent dose level escalations will occur based on criteria outlined in the protocol.
TYRA-300 0.25 mg/kgDRUGSubsequent dose level escalations will occur based on criteria outlined in the protocol.
TYRA-300 0.375 mg/kgDRUGSubsequent dose level escalations will occur based on criteria outlined in the protocol.
TYRA-300 0.50 mg/kgDRUGSubsequent dose level escalations will occur based on criteria outlined in the protocol.
TYRA-300 0.625 mg/kgDRUGSubsequent dose level escalations may occur based on criteria outlined in the protocol.
TYRA-300DRUGTYRA-300 is an oral, novel potent FGFR 3-selective tyrosine kinase inhibitor that targets tumors that contain activating gene alterations of FGFR3.
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites36

* Participants ≥ 18 years of age at the time of informed consent and willing and able to comply with all required study procedures * Confirmed LG UTUC (both favorable and unfavorable) per AUA * At least 5mm of marker lesion(s) left behind * Identification of marker lesion(s) within 8 weeks prior to ...

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

LOWNov 2, 2026NCT07265947lastUpdatePostDate: changed
LOWNov 2, 2026NCT07265947lastUpdatePostDate: changed
LOWOct 27, 2026NCT06995677lastUpdatePostDate: changed
LOWOct 27, 2026NCT06995677lastUpdatePostDate: changed
MEDIUMOct 16, 2026NCT07265947Enrollment: 230 → 285
MEDIUMOct 16, 2026NCT07265947Enrollment: 230 → 285
LOWOct 13, 2026NCT07265947lastUpdatePostDate: changed
LOWOct 13, 2026NCT07265947lastUpdatePostDate: changed
LOWOct 2, 2026NCT07265947lastUpdatePostDate: changed
LOWOct 2, 2026NCT07265947lastUpdatePostDate: changed
LOWOct 1, 2026NCT06842355lastUpdatePostDate: changed
LOWOct 1, 2026NCT06842355lastUpdatePostDate: changed
MEDIUMSep 29, 2026NCT06995677lastUpdatePostDate: changed
MEDIUMSep 29, 2026NCT06995677lastUpdatePostDate: changed
LOWSep 28, 2026NCT07265947lastUpdatePostDate: changed
LOWSep 28, 2026NCT07265947lastUpdatePostDate: changed
LOWSep 16, 2026NCT07265947lastUpdatePostDate: changed
LOWSep 16, 2026NCT07265947lastUpdatePostDate: changed
LOWSep 16, 2026NCT07265947lastUpdatePostDate: changed
LOWSep 16, 2026NCT07265947lastUpdatePostDate: changed

Frequently asked questions about Dabogratinib

What is dabogratinib?

Dabogratinib is an investigational small molecule drug developed by Tyra Biosciences, Inc. (ticker TYRA) for FGFR3-driven conditions. It is being studied in achondroplasia and in several urothelial cancers, including locally advanced urothelial carcinoma, low grade upper tract urothelial carcinoma, and low-grade non-muscle invasive bladder cancer. It is also known as TYRA-300.

What does dabogratinib target?

Dabogratinib targets FGFR3, a fibroblast growth factor receptor kinase. It belongs to the -tinib kinase inhibitor class, and its development focuses on cancers and skeletal conditions linked to FGFR3 gene alterations such as mutations, fusions, and amplifications.

Who is developing dabogratinib?

Dabogratinib is being developed by Tyra Biosciences, Inc., which trades under the ticker TYRA. The company sponsors the clinical program for the drug across achondroplasia and FGFR3-altered urothelial cancers.

What phase is dabogratinib in?

Dabogratinib is in Phase 2 clinical development. It is investigational and is being evaluated in recruiting Phase 2 studies as well as a Phase 1 study in advanced urothelial carcinoma and other solid tumors with FGFR3 gene alterations.

What clinical trials is dabogratinib in?

Dabogratinib trials include NCT07265947, a Phase 2A/B study in low grade upper tract urothelial carcinoma, and NCT06995677, a Phase 2 study in FGFR3-altered low grade, intermediate risk non-muscle invasive bladder cancer. The BEACH301 study in children with achondroplasia is NCT06842355, and NCT05544552 is a Phase 1 study in advanced urothelial carcinoma and other solid tumors.

Is dabogratinib the same as TYRA-300?

Yes, dabogratinib is the same drug as TYRA-300. TYRA-300 is the development code used in trial titles and dosing labels such as TYRA-300 60mg and TYRA-300 0.125 mg/kg, while dabogratinib is the drug name.