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PTC596

Phase 2

Cancer | Small molecule | Oncology |PTC Therapeutics, Inc.|Trials Updated: Apr 23, 2024

PTC596 development status

Highest phase Phase 2 (NCT05269355)
Phase scored for PTCTPhase 1
Registered trials 5 across 3 sponsors since Mar 2015

PTC596 target and mechanism

ModalitySmall molecule

Also known as Unesbulin

Success Probability

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Market & Valuation

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Trial Design

CONTROLLED
Total Trials3
Total Enrollment99

FDA Designations

No designations recorded

PTC596 clinical trials

PTC596 · 3 trials · 3 indications

Phase 1 3
NCT03206645Unesbulin in Women With Ovarian Cancer Receiving Neoadjuvant ChemotherapyOvarian Cancer
COMPLETED27 Analytics
NCT03761095A Study of Unesbulin (PTC596) in Combination With Dacarbazine in Participants With Advanced Leiomyosarcoma (LMS)Leiomyosarcoma
COMPLETED41 Analytics
NCT02404480PTC596 in Patients With Advanced Solid TumorsCancer
COMPLETED31 Analytics
PHASE1COMPLETED
Unesbulin in Women With Ovarian Cancer Receiving Neoadjuvant Chemotherapy
Ovarian CancerUnlock trial analytics
PHASE1COMPLETED
A Study of Unesbulin (PTC596) in Combination With Dacarbazine in Participants With Advanced Leiomyosarcoma (LMS)
LeiomyosarcomaUnlock trial analytics
PHASE1COMPLETED
PTC596 in Patients With Advanced Solid Tumors
CancerUnlock trial analytics

Study Endpoints

Primary Endpoints

Maximum tolerated dose and dose limiting toxicities
42 days

To determine the maximum tolerated dose (MTD) and dose limiting toxicities (DLTs) of Unesbulin in combination with and following conventional chemotherapy and as maintenance as a capsule (weight-based dosing) and a tablet (fixed dosing). Standard chemotherapy will be comprised of carboplatin and weekly paclitaxel. The DLTs will be based on adverse events that occur during administration of the first 2 cycles of combination Unesbulin and chemotherapy (a cycle = 21 days).

Number of patients able to tolerate drug combination
3 years

To examine the tolerability of the combination at the MTD of Unesbulinassessed in combination with standard neoadjuvant chemotherapy.

Phase 2 Dose
3 years

To determine the recommended phase II dose (RP2D) of Unesbulin in combination with standard neoadjuvant chemotherapy.

MTD and RP2D of Unesbulin in Combination With Dacarbazine
First 2 cycles of treatment (6 weeks)

MTD will be determined using the TITE-CRM for dose-finding. MTD is defined as the dose associated with a target probability of DLT of 0.25.

Number of Participants With Adverse Events
From screening until end of study (up to approximately 1.5 years)
Dose-limiting toxicities
28 days

Determine the RP2D based on occurrence of DLTs and/or biological efficacy as determined by biomarker changes.

Secondary Endpoints

Evaluate clinical response
3 years
Evaluate pharmacokinetic Area Under the Curve (AUC)
3 months
Evaluate pharmacokinetic Maximum Concentration observed (Cmax)
3 months
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Carboplatin/Paclitaxel + PTC596EXPERIMENTALCarboplatin AUC 6mg/L IV on day 1; Paclitaxel 175mg/m2 IV on day 1; Unesbulin PO, twice a week, on day 1, 4, 8, 11, 15 and 18 per 21-day cycle for the first 3 cycles.
Unesbulin and DacarbazineEXPERIMENTALParticipants will receive unesbulin orally twice weekly in combination with dacarbazine IV once every 21 days. The first participant will receive dacarbazine 1000 mg/m\^2 IV every 21 days in combination with unesbulin 200 mg tablet orally twice weekly. For subsequent participants, the dose level at which treatment is initiated will be selected based on the TITE-CRM using the most up to date dose DLT information from all participants previously treated. Participants will receive unesbulin 300 mg twice weekly in combination with dacarbazine in the expansion cohort. Treatment will continue for each participant until evidence of unacceptable toxicity, disease progression, or treatment discontinuation for another reason.
Cohort 1EXPERIMENTALPTC 596 administered twice daily- Dose level 0.65mg/kg
Cohort 2EXPERIMENTALPTC 596 administered twice daily-Dose level 1.3mg/kg
Cohort 3EXPERIMENTALPTC 596 administered twice daily-2.6mg/kg
Cohort 4EXPERIMENTALPTC 596 administered twice daily-Dose level 5.2mg/kg
Cohort 5EXPERIMENTALPTC 596 administered twice daily-Dose level 10mg/kg
Cohort 6EXPERIMENTALPTC 596 administered twice daily-Dose level 7mg/kg
Cohort 7 (Bio Marker cohort)EXPERIMENTALPTC 596 administered twice daily-Dose level 5.2mg/kg

Interventions

NameTypeDescription
UnesbulinDRUGUnesbulin will be given in combination with carboplatin and paclitaxel for up to 7 cycles depending on which cohort the patient is in.
DacarbazineDRUGDacarbazine will be administered as per the dose and schedule specified in the arm.
PTC596DRUGPTC 596 will be administered orally twice a day until unmanageable toxicity, disease progression, or withdrawal of consent is noted
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Eligibility Criteria

Age Range18 Years to 99 Years
SexFEMALE
Healthy VolunteersNo
Study Sites1

Inclusion Criteria: * Histologically documented epithelial ovarian, primary peritoneal or fallopian tube carcinoma or high grade serous adenocarcinoma, endometrioid adenocarcinoma, undifferentiated carcinoma, clear cell adenocarcinoma, mixed epithelial carcinoma,or adenocarcinoma not otherwise spec...

Countries:United StatesCanada
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Competitive Landscape -Cancer 7 trials

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Frequently asked questions about PTC596

What is PTC596 used for?

PTC596 is an investigational small molecule being developed for the treatment of cancer. It is being studied in patients with advanced solid tumors. The drug is currently in clinical development and has not been approved by regulatory authorities.

Who makes PTC596?

PTC596 is being developed by PTC Therapeutics, Inc., a biopharmaceutical company. The company's stock is traded under the ticker symbol PTCT. PTC Therapeutics is conducting clinical trials to evaluate the safety and efficacy of PTC596 in cancer patients.

What phase is PTC596 in?

PTC596 is in Phase 1 clinical development. A Phase 1 trial has been completed, which involved 31 patients with advanced solid tumors. The drug is still investigational and has not received regulatory approval for any indication.

What clinical trials is PTC596 in?

PTC596 has been studied in one clinical trial with the identifier NCT02404480, titled 'PTC596 in Patients With Advanced Solid Tumors'. This Phase 1 study was completed and enrolled 31 participants in the United States and Canada. The trial included adult patients aged 18 years and older.

Is PTC596 FDA approved?

PTC596 is not FDA approved. It is an investigational drug that has completed a Phase 1 clinical trial for advanced solid tumors. The drug remains in clinical development, and its safety and efficacy have not been established for regulatory approval.