Status and phase
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About
Primary Objectives Phase Ib To evaluate the safety and tolerability of Purinostat Mesylate in combination therapy for advanced solid tumors; and to explore the dose-limiting toxicity (DLT) and maximum tolerated dose (MTD) of Purinostat Mesylate in combination therapy in patients with advanced solid tumors.
To determine the recommended Phase II dose (RP2D) of Purinostat Mesylate in combination therapy for advanced solid tumors.
Phase IIa To further evaluate the preliminary efficacy of Purinostat Mesylate in combination therapy in patients with advanced solid tumors.
Secondary Objectives Phase Ib To evaluate the safety and tolerability of Purinostat Mesylate Monotherapy for the treatment of advanced solid tumors; To evaluate the preliminary efficacy of Purinostat Mesylate in combination therapy in patients with advanced solid tumors; To evaluate the pharmacokinetic characteristics of Purinostat Mesylate in combination therapy for the treatment of advanced solid tumors.
Phase IIa To further evaluate the safety and tolerability of Purinostat Mesylate in combination therapy for advanced solid tumors.
To evaluate the pharmacokinetic characteristics of Purinostat Mesylate in combination therapy for advanced solid tumors.
Exploratory Objectives To assess the pharmacodynamic characteristics in Purinostat Mesylate combination therapy for advanced solid tumors.
Enrollment
Sex
Ages
Volunteers
Inclusion criteria
Participants must meet all of the following inclusion criteria:
Monotherapy Dose-Escalation Phase:
Monotherapy in Cohort A0 (Breast Cancer):
Histologically or cytologically confirmed locally advanced or metastatic breast cancer that has failed standard treatment, for which no standard treatment is available, or for which standard treatment is not suitable at the current stage.
Monotherapy in Cohort B0 (Solid Tumors):
Histologically or cytologically confirmed locally advanced or metastatic solid tumors that have failed standard treatment, for which no standard treatment is available, or for which standard treatment is not suitable at the current stage. This includes but is not limited to triple-negative breast cancer, colorectal cancer, and urothelial cancer.
Combination Therapy Dose-Escalation Phase:
Combination with Fulvestrant in Cohort A (Breast Cancer):
Histologically or cytologically confirmed breast cancer in perimenopausal, premenopausal, or postmenopausal women with estrogen receptor (ER)-positive, progesterone receptor (PgR)-negative or positive, and non-HER2-positive (including HER2-negative and low-expression) disease.
Participants must have progressed or recurred after at least one line of endocrine therapy (regardless of whether it was in the advanced, metastatic, or neoadjuvant chemotherapy setting), with up to two lines of prior chemotherapy allowed.
Ineligible for surgical resection.
Definition of menopause must meet one of the following criteria:
Combination with Tislelizumab in Cohort B (Solid Tumors):
Histologically or cytologically confirmed locally advanced or metastatic solid tumors that have failed standard treatment, for which no standard treatment is available, or for which standard treatment is not suitable at the current stage.
The definition of failure of standard treatment for each tumor type is as follows:
Non-small cell lung cancer: Metastatic patients without driver gene mutations: Progression or recurrence after at least second-line treatment (including platinum-based chemotherapy); Patients with tumors harboring EGFR, ROS1, ALK, or other driver gene mutations should have experienced failure of targeted therapy for these mutations and then progressed or recurred after at least second-line treatment (including platinum-based chemotherapy).
Small cell lung cancer: Progression or recurrence after at least second-line treatment.
Colorectal cancer: Progression or recurrence after at least second-line treatment (standard chemotherapy regimens previously received include fluorouracil or its derivatives, oxaliplatin, and irinotecan. Patients with BRAF V600E mutation should have received BRAF inhibitors. Patients with MSIH/dMMR should have received PD-1/PD-L1 therapy).
Head and neck squamous cell carcinoma: Progression or recurrence after at least second-line treatment (including platinum-based chemotherapy).
Urothelial cancer: Progression or recurrence after at least second-line treatment (recommended treatment regimens include PD-1/PD-L1 therapy, platinum-based chemotherapy, taxane chemotherapy, Disitamab Vedotin, and vinflunine. Patients with FGFR2/3 mutations should have received erdafitinib).
Esophageal cancer: Progression or recurrence after at least second-line treatment (including platinum-based chemotherapy).
Cervical cancer: Progression or recurrence after at least second-line treatment (including platinum-based chemotherapy. Patients with PD-L1 positivity, TMB-H, or MSI-H/dMMR should have received PD-1/PD-L1 therapy).
Hepatocellular carcinoma: Progression or recurrence after at least second-line treatment.
Renal cell carcinoma: Progression or recurrence after at least second-line treatment.
Phase IIa:
The tumor types and biomarker requirements for each expansion cohort in Phase IIa will be further determined based on data from Phase Ib and discussions with the Study Monitoring Committee (SMC).
Absolute neutrophil count (ANC) ≥1.5×10^9/L;
Hemoglobin (HGB) ≥90 g/L;
Platelet count (PLT) ≥100×10^9/L;
Serum creatinine ≤1.5×ULN or estimated creatinine clearance ≥60 mL/min (according to the Cockcroft and Gault formula);
Serum total bilirubin (TBil) ≤1.5×ULN. For participants with liver metastases or Gilbert's syndrome, TBil >1.5×ULN is allowed if direct bilirubin (DBil) is <ULN. AST and ALT ≤2.5×ULN. For participants with liver metastases or Gilbert's syndrome, AST/ALT ≤5×ULN is allowed.
Exclusion criteria
Participants who meet any of the following criteria are not eligible for the trial:
Known severe allergy to the investigational drug, any of the combination drugs, or any of their excipients (hydroxypropyl-beta-cyclodextrin, arginine, tromethamine, mannitol).
Presence or history of other malignancies (except adequately treated basal cell carcinoma or squamous cell carcinoma of the skin, or cervical carcinoma in situ), unless the participant has undergone curative treatment and has evidence of no recurrence or metastasis within the past 5 years.
Symptomatic central nervous system (CNS) metastases or CNS metastases requiring corticosteroid treatment within 2 weeks before the first dose of the study drug. Participants with asymptomatic CNS metastases are also excluded. Participants with leptomeningeal carcinomatosis or meningeal dissemination are excluded.
Participants with a history of anti-tumor treatment meeting the following criteria must be excluded:
Note: If a participant has received multiple treatments with different washout periods, the actual washout period will be determined by the longer duration.
Participants who have previously received HDAC inhibitors.
Participants who have previously received any estrogen receptor degraders, including but not limited to fulvestrant, are not eligible for the cohort combining with fulvestrant.
Participants who have previously received anti-PD-1/PD-L1 antibody treatment are not eligible for the cohort combining with tislelizumab, unless the participant has previously benefited from anti-PD-1/PD-L1 treatment in the advanced/metastatic setting and may be included.
Participants with a severe infection within 4 weeks before the first dose of PM (Purinostat Mesylate), or those with active infections requiring oral or intravenous antibiotic treatment within the last 2 weeks.
Participants who received transfusions, recombinant human thrombopoietin, recombinant human interleukin-11, erythropoiesis-stimulating agents, or granulocyte colony-stimulating factors within 2 weeks before the first dose of the study drug.
For breast cancer: Participants with symptomatic, visceral metastatic disease at high risk of life-threatening complications in the short term (patients with visceral crisis) or inflammatory breast cancer.
Participants who experienced ≥Grade 3 immune-related adverse events during previous immunotherapy are not eligible for the cohort combining with tislelizumab.
Participants with active or a history of autoimmune diseases that are at risk of recurrence (e.g., systemic lupus erythematosus, rheumatoid arthritis, vasculitis) are not eligible for the cohort combining with tislelizumab. Exceptions include participants with Type I diabetes or autoimmune thyroiditis that can be managed with replacement therapy.
Participants who received systemic corticosteroids (prednisone >10 mg/day or equivalent) or other immunosuppressive agents within 14 days before the first dose of PM are not eligible for the cohort combining with tislelizumab.
Exceptions include the use of topical, ocular, intra-articular, nasal, and inhaled corticosteroids, and short-term corticosteroids for prophylactic treatment (e.g., prior to contrast administration).
Participants with uncontrolled or significant cardiovascular or cerebrovascular diseases, including:
Uncontrolled electrolyte disturbances that may affect the action of QTc-prolonging drugs (e.g., hypocalcemia <1.0 mmol/L, hypokalemia <lower limit of normal, hypomagnesemia <0.5 mmol/L), but retesting is allowed after intervention.
Current or history of any severity of interstitial lung disease with significant impairment of pulmonary function.
Presence of third-space effusions (e.g., pleural effusion, ascites) that cannot be controlled by drainage or other methods.
Participants who underwent major surgery requiring general anesthesia within 4 weeks before the first dose of PM or have not withdrawn from other clinical trials; those who underwent surgery requiring local anesthesia/epidural anesthesia within 2 weeks before enrollment and have not recovered (except for tissue biopsy).
Clinically significant active infections, including hepatitis B (HBV) and hepatitis C (HCV). Active hepatitis B is defined as participants who are HBsAg positive or HBcAb positive with HBV-DNA above the limit of detection (i.e., upper limit of normal for the laboratory of each center). If participants achieve HBV-DNA negativity after antiviral therapy and are willing to continue antiviral therapy during the study, they may be enrolled after receiving at least 2 weeks of antiviral treatment before the first dose. Active hepatitis C is defined as HCV antibody positive with HCV-RNA above the limit of detection (upper limit of normal). Positive Treponema pallidum antibody (TPAb) and positive non-treponemal antibody titer.
History of immunodeficiency, including positive HIV antibody test, or other acquired or congenital immunodeficiency diseases, or history of organ transplantation.
Participation in another interventional clinical trial within 4 weeks before enrollment.
Pregnant or breastfeeding women, or those who cannot ensure the use of contraception during the study and for at least 6 months after the last dose of Purinostat.
Other severe acute or chronic medical or psychiatric conditions or laboratory abnormalities that may increase the risk of participation in the study or the risk associated with the administration of the study drug, or may interfere with the study results, as well as other situations where the investigator deems the patient unsuitable for participation in this study.
Primary purpose
Allocation
Interventional model
Masking
132 participants in 4 patient groups
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Central trial contact
Zheng Jiang, bachelor; Liangkun Sun, bachelor
Data sourced from clinicaltrials.gov
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