This phase I/II trial is testing how safe and tolerable a new targeted cancer therapy is for the treatment of patients with mature B-cell blood cancer (when given in combination with the standard targeted therapy, zanubrutinib) or for patients with a type of advanced cancer (given in combination with the standard targeted therapy, tislelizumab)A Phase 1/2, Dose Escalation and Expansion Study of BGB-10188, a Phosphatidylinositol 3-Kinase Delta (PI3Kδ) Inhibitor, Combined With Zanubrutinib in Patients With Mature B-Cell Malignancies and Combined With Tislelizumab in Patients With Solid Tumors

Inclusion

Parts A, B and C

1. Confirmed diagnosis of one of the following:

   • Part A: R/R CLL/SLL, R/R MZL, R/R FL, R/R MCL or R/R DLBCL
   • Part B: R/R FL, R/R MCL, or R/R DLBCL
   • Part C: R/R FL, R/R MCL, or R/R DLBCL

2. Participants with MZL, FL, MCL, DLBCL, or SLL must have at least one bi-dimensionally measurable nodal lesion >1.5 cm in the longest diameter or extranodal lesion that is > 1cm in the longest diameter by computed tomography (CT) scan or magnetic resonance imaging (MRI), as defined by the Lugano Classification.

   Parts D and E

3. Part D: Histologically or cytologically confirmed unresectable locally advanced or metastatic solid tumors previously treated with standard systemic therapy (including prior chemotherapy, radiotherapy, target therapy and immunotherapy as locally, or guidance approved therapy) or for which treatment is not available or not tolerated. Enrollment will be limited to participants with advanced solid tumors for which there is clinical evidence of response to T-cell based immuno-oncology agents (eg, non-small cell lung cancer [NSCLC], small cell lung cancer [SCLC], head and neck squamous cell cancer, hepatocellular carcinoma, gastric or gastroesophageal junction carcinoma, nasopharyngeal carcinoma, renal cell carcinoma, cervical cancer, triple-negative breast cancer, ovarian cancer (OC), endometrial carcinoma, esophageal cancer, melanoma, urothelial carcinoma or participant with confirmed microsatellite instability-high [MSI-H] or mismatch repair deficient [dMMR] solid tumor, etc). Enrollment of tumor types beyond above situations requires sponsor's approval.
4. Part E: Participants with histologically or cytologically confirmed epithelial OC (including fallopian or primary peritoneal cancer) previously treated with 1 to 3 lines of systemic anticancer treatment; must be platinum resistant and checkpoint inhibitor (CPI) naïve.
5. Participants must have measurable disease as assessed by RECIST v1.1.