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ATX-898

Phase 1

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

Success Probability

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Market & Valuation

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Trial Design

CONTROLLEDBiomarker
Total Trials1
Total Enrollment343

FDA Designations

No designations recorded

Clinical trial landscape

ATX-898 · 1 trial · 1 indication

Phase 1 1
NCT07767474A Study to Evaluate ATX-898 in Participants With Advanced Solid TumorsAdvanced Solid Tumors
NOT YET_RECRUITING343 Analytics
PHASE1NOT YET_RECRUITING
A Study to Evaluate ATX-898 in Participants With Advanced Solid Tumors
Advanced Solid TumorsUnlock trial analytics

Study Endpoints

Primary Endpoints

Part 1a monotherapy dose escalation - Occurrence of Dose limiting toxicities (DLTs)
12 months

Toxicities occurring within the first treatment cycle (28 days). DLTs will be assessed in severity by the investigators per CTCAE v 6.0

Part 1a monotherapy dose escalation - Maximally tolerated/tested dose (MTD)
12 months

Maximum dose deemed safe and well tolerated during dose escalation

Part 1a monotherapy dose escalation - Recommended dose for expansion (RDE)
12 months

Monotherapy dose recommended to test during dose expansion

Part 1a monotherapy dose escalation - Treatment emergent adverse events (TEAEs)
12 months

Any adverse event (AE) either reported for the first time or worsening of a pre-existing event after first dose of study drug.

Part 1b monotherapy dose expansion - Objective Response Rate (ORR)
24 months

Percentage of participants with confirmed CR or PR per RECIST 1.1

Part 2a combination dose escalation - Occurrence of Dose limiting toxicities (DLTs)
18 months

Toxicities occurring within the first treatment cycle of combination therapy (28 days). DLTs will be assessed in severity by the investigators per CTCAE v 6.0

Part 2a combination dose escalation - Maximally tolerated/tested dose (MTD)
18 months

Maximum dose deemed safe and well tolerated during dose escalation of with combination treatment

Part 2a combination dose escalation - Recommended dose for expansion (RDE)
18 months

Recommended dose for expansion (RDE) Monotherapy dose recommended to test during dose expansion of combination treatment 18 months

Part 2a combination dose escalation - Treatment emergent adverse events (TEAEs)
18 months

Any adverse event (AE) either reported for the first time or worsening of a pre-existing event after first dose of study drug. 18 months

Part 2b combination dose expansion - Objective Response Rate (ORR)
36 months

Percentage of participants with confirmed CR or PR per RECIST 1.1

Secondary Endpoints

Part 1a monotherapy dose escalation - Pharmacokinetic assessment Cmax
12 months
Part 1a monotherapy dose escalation - Pharmacokinetic assessment Tmax
12 Months
Part 1a monotherapy dose escalation - Pharmacokinetic assessment AUC
12 Months
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Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Part 1a: Monotherapy Dose EscalationEXPERIMENTALATX-898 will be given at a protocol defined starting dose for the treatment of participants with selected advanced or metastatic solid tumors. Subsequent dose regimen will be determined during study execution
Part 1b1: Monotherapy Dose Expansion Cohort Disease Group 1EXPERIMENTALATX-898 will be given at the recommended dose for expansion (RDE) for the treatment of participants with selected advanced or metastatic ovarian cancer
Part 1b2: Monotherapy Dose Expansion Cohort Disease Group 2EXPERIMENTALATX-898 will be given at the recommended dose for expansion (RDE) for the treatment of participants with selected advanced or metastatic gynecologic cancers other than ovarian cancers
Part 1b2: Monotherapy Dose Expansion Cohort Disease Group 3EXPERIMENTALATX-898 will be given at the recommended dose for expansion (RDE) for the treatment of participants with selected advanced or metastatic solid tumors other than gynecologic cancers
Part 2a 1: Combination Dose EscalationEXPERIMENTALATX-898 will be given at a recommended starting dose in combination with fulvestrant and abemaciclib both at the protocol defined doses for the treatment of participants with advanced or metastatic HR+HER2- breast cancer. Subsequent dose regimen of ATX-898 will be determined during study execution
Part 2b 1: Combination Dose ExpansionEXPERIMENTALATX-898 will be given at a recommended dose for expansion (RDE) in combination with fulvestrant and abemaciclib both at the protocol defined doses for the treatment of participants with advanced or metastatic HR+HER2- breast cancer
Part 2b 2: Combination Dose ExpansionEXPERIMENTALATX-898 will be given at a recommended dose for expansion (RDE) in combination with fulvestrant and ribociclib both at the protocol defined doses for the treatment of participants with advanced or metastatic HR+HER2- breast cancer
Part 2a 2: Combination Dose EscalationEXPERIMENTALATX-898 will be given at a recommended starting dose in combination with fulvestrant and ribociclib both at the protocol defined doses for the treatment of participants with advanced or metastatic HR+HER2- breast cancer Subsequent dose regimen of ATX-898 will be determined during study execution

Interventions

NameTypeDescription
ATX-898DRUGDoses defined per protocol
ATX-898, fulvestrant, ribociclibDRUGATX-898 at RDE, Fulvestrant and abemaciclib: doses defined per protocol
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo

Inclusion Criteria: * Has histologically or cytologically confirmed advanced solid tumor malignancy that is metastatic or locally advanced and unresectable * Is ≥18 years of age at the time of signing the informed consent form * ECOG performance status score of 0 or 1 * Adequate organ function * Mu...

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Competitive Landscape -Other Solid Tumors 9 trials (matched to "Advanced Solid Tumors")