This is a prospective, multicenter, open-label, phase Ib/II clinical study to evaluate the safety and efficacy of linperlisib combined with chidamide in the treatment of relapsed or refractory peripheral T-cell lymphoma

Inclusion Criteria:

• Voluntarily participate in the clinical study; fully understand and be informed about the study and sign the Informed Consent Form (ICF); willing to comply with and capable of completing all trial procedures;
• Diagnosed with PTCL according to the 2022 revised WHO lymphoma classification standards based on pathological diagnosis by the research center
• Using the Lugano 2014 lymphoma efficacy evaluation criteria, the patient must have at least one measurable or evaluable lesion
• Treatment failure to at least one prior line of systemic standard therapy for PTCL.
• Age ≥ 18 years
• Expected survival greater than 12 weeks
• Eastern Cooperative Oncology Group (ECOG) performance status of 0-2
• Adequate organ and bone marrow function

Exclusion Criteria:

• Accompanied by hemophagocytic lymphohistiocytosis (HLH)
• Lymphoma involvement in the central nervous system or meninges
• Active infections
• Uncontrolled clinical cardiac symptoms or diseases
• Currently using (or unable to stop at least one week prior to the first dose) a known CYP3A strong inducer or strong inhibitor.
• Currently using vitamin K antagonists, antiplatelet drugs, anticoagulants (or unable to stop them within one week prior to the start of the study treatment).
• History of Human Immunodeficiency Virus (HIV) infection and/or Acquired Immunodeficiency Syndrome (AIDS).
• Patients with mental disorders or those unable to provide informed consent