This is an open-label, single-arm, multi-center phase II study consisting of two cohorts. Cohort 1 evaluates the pharmacokinetics (PK) of TQ05105 in myelofibrosis participants with normal, mild, or moderate renal impairment to guide dosing. Cohort 2 evaluates the efficacy and safety of TQ05105 in participants with intermediate/high-risk myelofibrosis who are refractory, relapsed, or intolerant to prior Janus kinase (JAK) inhibitor therapy.
Voluntary and signed informed consent, good compliance.
Age ≥18 years (at time of signing informed consent); Eastern Cooperative Oncology Group performance status (ECOG PS) 0-2; life expectancy ≥24 weeks.
Diagnosis of primary myelofibrosis (PMF) per World Health Organization (WHO) 2016, or post-polycythemia vera myelofibrosis (post-PV-MF) or post-essential thrombocythemia myelofibrosis (post-ET-MF) per International Working Group for Myelofibrosis Research and Treatment (IWG-MRT) criteria; Janus kinase 2 (JAK2) mutation status not restricted.
Intermediate or high risk per Dynamic International Prognostic Scoring System (DIPSS).
Prior allogeneic stem cell transplantation, or autologous stem cell transplantation within 3 months before first dose, or planned stem cell transplantation.
Prior treatment with 2 or more Janus kinase (JAK) inhibitors (except Cohort 1).
Prior splenectomy or splenic radiotherapy within 6 months before first dose.
Other malignancies within 3 years before first dose or currently present (exceptions per protocol).