Latest data of InnoCare’s (HKEX: 09969; SSE: 688428) robust oncology pipelines were presented at the ongoing European Hematology Association (EHA) 2025 Congress.
Poster Presentation:
1. First Presentation of Efficacy and Safety Data for First-Line Treatment of CLL/SLL with BCL2 Inhibitor Mesutoclax in Combination with BTK Inhibitor Orelabrutinib (Abstract No.: PS1567)
The study showed that mesutoclax (100 and 125 mg) in combination with orelabrutinib was safe and well tolerated in patients with treatment naïve (TN) CLL/SLL. Substantial efficacy was observed, with early high undetectable MRD (uMRD) rate.
42 patients with TN CLL/SLL were enrolled (mesutoclax 100 mg, n=21; 125 mg, n=21). The fixed-duration treatment of mesutoclax in combination with orelabrutinib is expected to deliver deeper remissions for TN CLL/SLL patients. In all patients, the overall response rate (ORR) was 97.6%.
At week 24 of the combination therapy, in the 125 mg dose cohort, the overall response rate (ORR) was 100%, the complete remission rate (CRR) was 23.8%, the CRR in target lesions was 57.1%, and the peripheral blood (PB) uMRD rate was 48%. In the 100 mg mesutoclax dose cohort, the ORR was 95.2%, the CRR was 19.0%, the CRR in target lesions was 42.9%, and the PB uMRD rate was 19%. With the extension of the duration of treatment, the therapeutic efficacy is expected to be further improved.
All patients are still on treatment. No disease progression or death occurred, and no adverse events leading to discontinuation of treatment were reported.
Due to its favorable efficacy and safety profile, a registrational Phase III clinical study of mesutoclax (125 mg once daily) in combination with orelabrutinib for the treatment of TN CLL/SLL patients has been initiated, with patient enrollment being accelerated.
2.Orelabrutinib Combined with Bendamustine-Rituximab or Obinutuzumab followed by Orelabrutinib Maintenance in Untreated Marginal Zone Lymphoma (OPTIMIZE): A Multicenter, Single-Arm, Phase II Study (Abstract No.: PF898)
The absence of a standard first-line treatment for marginal zone lymphoma (MZL) have inspired the exploration of novel regimens. In recent years, Bruton’s tyrosine kinase inhibitors (BTKis) have demonstrated durable responses with a favorable benefit-risk profile across all MZL subtypes in the relapsed/refractory setting. Orelabrutinib is a novel BTK inhibitor with higher selectivity and fewer off-target than other BTK inhibitors. Orelabrutinib combined with bendamustine-rituximab or obinutuzumab followed by orelabrutinib maintenance was effective and well-tolerated in untreated patients with MZL.
The majority of patients presented with MALT lymphoma and had Ann Arbor stage II-IV disease. At the end of induction treatment, the overall response rate (ORR) was 100.0% among all enrolled patients. At the data cutoff, the median progression-free survival (PFS) and overall survival (OS) remained immature. No BTK inhibitor-related adverse events (AEs), such as atrial fibrillation or bleeding, were observed.
3.The Rationality, Efficacy and Safety of Orelabrutinib plus Obinutuzumab (O2) in Systemic Treatment-naïve Marginal Zone Lymphoma: A Prospective Cohort Study (Abstract No.: PS1902)
The Orelabrutinib plus Obinutuzumab regimen had well rationality and demonstrated promising efficacy.
Across the entire study and during the period of induction therapy, the best objective response rate (ORR) was 100%. 3 patients who achieved partial response (PR) after the induction therapy subsequently achieved complete response (CR) in the maintenance period. The 18-month progression-free survival (PFS) and overall survival (OS) rates were both 100%.
4.Ultra-low Dose Radiotherapy Combined with Orelabrutinib Improves the Complete Response Rate of Treatment for Localized Ocular Adnexal Extranodal Marginal Zone B-cell Lymphoma (Abstract No.: PS1901)
The combination of ultra-low dose radiotherapy and orelabrutinib in the treatment of ocular adnexal extranodal marginal zone lymphoma (OA-EMZL) not only improves the effectiveness of treatment but also significantly reduces the toxic effects of radiotherapy, providing a new approach for the treatment of localized OA-EMZL.
Of all the 17 patients who completed treatment, 16 patients achieved complete response (CR) and one patient achieved a partial response. Additionally, the lesions ...
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