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TTI-101

Phase 2

Idiopathic Pulmonary Fibrosis | Small molecule | Respiratory |Tvardi Therapeutics, Inc.|Last Updated: Apr 27, 2026

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Trial Design
RandomizedDouble-BlindPLACEBO_CONTROLLEDDMC
Total Trials1
Total Enrollment100
FDA Designations
No designations recorded
Clinical trial landscape

TTI-101 · 4 trials · 11 indications

Phase 2 1Phase 1 3
NCT05671835Study of TTI-101 in Participants With Idiopathic Pulmonary FibrosisIdiopathic Pulmonary Fibrosis
COMPLETED100 Analytics
PHASE2COMPLETED
Study of TTI-101 in Participants With Idiopathic Pulmonary Fibrosis
Idiopathic Pulmonary FibrosisUnlock trial analytics
Study Endpoints
Primary Endpoints
Number of Participants with an Adverse Event (AE)
16 weeks

Incidence of AEs, including serious AEs assessed using National Cancer Institute Common Terminology Criteria for Adverse Events (NCI-CTCAE) V.5.0. Clinically significant changes between baseline and postbaseline laboratory assessments, electrocardiograms, vital signs, and physical examinations will be recorded as AEs.

Maximum tolerated dose (MTD) and/or recommended phase II dose (RP2D) of TTI-101 and SBRT
Through completion of follow-up (estimated to be 2 years and 3 months)

* The maximum tolerated dose (MTD) is defined as the dose level immediately below the dose level at which 2 patients of a cohort (of 2 to 6 patients) experience dose-limiting toxicity during the dose-limiting toxicity (DLT) evaluation period. * The final determination of the RP2D will be based on an overall evaluation of the totality of the available data observed in phase IB.

Incidence of Adverse Events (AE)
Up to approximately 20 months

An AE is any untoward medical occurrence in a participant or clinical study participant administered a pharmaceutical product and which does not necessarily have a causal relationship with this treatment. Any clinically significant changes between baseline and postbaseline laboratory assessments, electrocardiograms (ECGs), vital signs and physical examinations will be recorded as AEs.

Incidence of Serious Adverse Events (SAE)
Up to approximately 18 months
Phase 2: Overall Response Rate (ORR) to TTI-101
Up to approximately 18 months

ORR (calculated as Partial Response \[PR\] + Complete Response \[CR\]) using RECIST Version 1.1.

Maximum Tolerated Dose of TTI-101
28 days

To determine the maximum tolerated dose (MTD), dose-limiting toxicities, and tolerability of TTI-101 administered orally to patients with advanced breast cancer and other solid tumors. Dose-limiting toxicity is defined as a Grade 3 or above adverse event (using CTCAE v5.0) within the first treatment cycle (28-days).

Pharmacokinetics - Cmax
18 months

Cmax(obs) will be determined by direct inspection of the plasma drug concentration versus time data point values.

Pharmacokinetics - Tmax
18 months

Tmax(obs) will also be determined by direct inspection of the plasma drug concentration versus time data point values.

Pharmacokinetics - AUC(0-t)
18 months

AUC(0-t) (where t = the time point for the last sample on the pharmacokinetic profile in which quantifiable drug was detected) will be estimated using linear or linear/log trapezoidal calculation.

Secondary Endpoints
Maximum Observed Plasma Concentration (Cmax) of TTI-101
Day 1 to Week 12
Time of Maximum Observed Plasma Concentration (tmax) of TTI-101
Day 1 to Week 12
Area Under the Plasma Concentration-time Curve Over a Dosing Interval (AUC[0-τ]) of TTI-101
Day 1 to Week 12
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Study Design & Arms
AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
TTI-101 400 mg/dayEXPERIMENTALParticipants will receive 400 mg/day of TTI-101 twice daily (BID) for 12 weeks.
TTI-101 800 mg/dayEXPERIMENTALParticipants will receive 800 mg/day of TTI-101 BID for 12 weeks.
PlaceboPLACEBO_COMPARATORParticipants will receive a matching placebo BID for 12 weeks.
TTI-101 + SBRT Dose Level 0 (original starting dose)EXPERIMENTAL* Treatment consists of TTI-101 by mouth twice daily at 400 mg and SBRT (5 fractions of 6.6 Gy each) over the course of 3 weeks. * After combination therapy is concluded, patients who entered the study as locally advanced will receive up to 10 additional weeks of TTI-101 monotherapy (until a tumor biopsy that will occur between Weeks 9 and 13). After discontinuation of TTI-101, patients will receive SOC chemotherapy as part of their routine care (not dictated by study participation). * Patients who entered the study as borderline resectable will be assessed following the initial 3 weeks of treatment. If they have reverted to resectable, they will undergo surgery, followed by optional adjuvant chemotherapy at the discretion of their treating team. If they are unresectable, they will follow the path of the locally advanced patients (up to 10 weeks of TTI-101 monotherapy, followed by disease assessment, followed by SOC chemotherapy).
TTI-101 + SBRT Dose Level -1 (WUSM starting dose)EXPERIMENTAL* Treatment consists of TTI-101 by mouth twice daily at 200 mg and SBRT (3 fractions of 6 Gy each) over the course of 3 weeks. * After combination therapy is concluded, patients who entered the study as locally advanced will receive up to 10 additional weeks of TTI-101 monotherapy (until a tumor biopsy that will occur between Weeks 9 and 13). After discontinuation of TTI-101, patients will receive SOC chemotherapy as part of their routine care (not dictated by study participation). * Patients who entered the study as borderline resectable will be assessed following the initial 3 weeks of treatment. If they have reverted to resectable, they will undergo surgery, followed by optional adjuvant chemotherapy at the discretion of their treating team. If they are unresectable, they will follow the path of the locally advanced patients (up to 10 weeks of TTI-101 monotherapy, followed by disease assessment, followed by SOC chemotherapy).
TTI-101 + SBRT Dose Level -2EXPERIMENTAL* Treatment consists of TTI-101 by mouth twice daily at 200 mg and SBRT (1 fraction of 12 Gy each) over the course of 3 weeks. * After combination therapy is concluded, patients who entered the study as locally advanced will receive up to 10 additional weeks of TTI-101 monotherapy (until a tumor biopsy that will occur between Weeks 9 and 13). After discontinuation of TTI-101, patients will receive SOC chemotherapy as part of their routine care (not dictated by study participation). * Patients who entered the study as borderline resectable will be assessed following the initial 3 weeks of treatment. If they have reverted to resectable, they will undergo surgery, followed by optional adjuvant chemotherapy at the discretion of their treating team. If they are unresectable, they will follow the path of the locally advanced patients (up to 10 weeks of TTI-101 monotherapy, followed by disease assessment, followed by SOC chemotherapy).
TTI-101 + SBRT Expansion PhaseEXPERIMENTAL* Treatment consists of TTI-101 by mouth twice daily at the RP2D dose and SBRT (at the RP2D dose and timing) over the course of 3 weeks. * After combination therapy is concluded, patients who entered the study as locally advanced will receive up to 10 additional weeks of TTI-101 monotherapy (until a tumor biopsy that will occur between Weeks 9 and 13). After discontinuation of TTI-101, patients will receive SOC chemotherapy as part of their routine care (not dictated by study participation). * Patients who entered the study as borderline resectable will be assessed following the initial 3 weeks of treatment. If they have reverted to resectable, they will undergo surgery, followed by optional adjuvant chemotherapy at the discretion of their treating team. If they are unresectable, they will follow the path of the locally advanced patients (up to 10 weeks of TTI-101 monotherapy, followed by disease assessment, followed by SOC chemotherapy).
Cohort A: TTI-101 as a Single AgentEXPERIMENTALCohort A Phase 1b: Participants will receive various dose levels of TTI-101 as a single agent to determine the RP2D. Cohort A Phase 2: Enrollment in Phase 2 may commence with approval from the safety review committee. Participants will be enrolled and treated at the RP2D of TTI-101 as a single agent.
Cohort B: TTI-101 in Combination with PembrolizumabEXPERIMENTALCohort B Phase 1b: Participants will receive various dose levels of TTI-101 in combination with pembrolizumab to determine the RP2D. Cohort B Phase 2: Enrollment in Phase 2 may commence with approval from the safety review committee. Participants will be enrolled and treated at the RP2D of TTI-101 in combination with pembrolizumab.
Cohort C: TTI-101 in Combination with Atezolizumab and BevacizumabEXPERIMENTALCohort C Phase 1b: Participants will receive various dose levels of TTI-101 in combination with atezolizumab and bevacizumab to determine the RP2D. Cohort C Phase 2: Enrollment in Phase 2 may commence with approval from the safety review committee. Participants will be enrolled and treated at the RP2D of TTI-101 in combination with atezolizumab and bevacizumab.
Dose escalation studyEXPERIMENTALParticipants will receive up to 4 dose levels of TTI-101 to determine RP2D
Dose expansion studyEXPERIMENTALEnrollment in the dose expansion may commence with approval from the safety review committee. Participants will be enrolled and treated at the RP2D of TTI-101
Food effect studyEXPERIMENTALParticipants will be treated with TTI-101 at the RP2D under fed and fasted conditions to assess the bioavailability of TTI-101 and to determine the best conditions for taking the study drug
Dose expansion, cross-over studyEXPERIMENTALParticipants will be administered different formulations of TTI-101 to compare bioavailability.
Interventions
NameTypeDescription
TTI-101DRUGOrally via a tablet.
PlaceboDRUGOrally via a tablet.
Stereotactic body radiation therapyRADIATIONGiven at the assigned dose and fractions assigned in the protocol.
PembrolizumabDRUGIntravenous (IV) infusion
AtezolizumabDRUGIntravenous (IV) infusion
BevacizumabDRUGIntravenous (IV) infusion
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Eligibility Criteria
Age Range40 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites28

Inclusion Criteria: 1. Diagnosed with IPF based on either the 2018 American Thoracic Society (ATS)/ European Respiratory Society (ERS)/ Japanese Respiratory Society (JRS)/ Latin American Thoracic Association (ALAT) International Diagnostic Guidelines or on the 2022 updated guidelines within 7 years...

Countries:United States
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Recent Changes (Last 90 Days)
MEDIUMMay 26, 2026NCT05440708Enrollment: 178 → 193
LOWMay 24, 2026NCT05440708studyFirstPostDate: changed
LOWMay 24, 2026NCT06141031studyFirstPostDate: changed