SELLAS Life Sciences Reports Encouraging Outcomes in DLBCL Trial

Selling a Glimmer of Hope: Results from SELLAS in DLBCL Treatment

A recent announcement by SELLAS Life Sciences Group, Inc. (NASDAQ: SLS) has stirred significant excitement in the oncology community. After conducting a Phase 2a trial exploring the efficacy of SLS009 (tambiciclib), a selective CDK9 inhibitor, in relapsed/refractory Diffuse Large B-Cell Lymphoma (r/r DLBCL) patients, the data provided a ray of hope for those battling this aggressive form of cancer.

A Collaborative Effort for Cancer Treatment

This trial, sponsored by GenFleet Therapeutics (Shanghai), Inc., was carefully crafted as an open-label single-arm multicenter study in China. The primary goal was to evaluate the performance of SLS009 when combined with the BTK inhibitor, Brukinsa® (zanubrutinib), among r/r DLBCL patients. The results were promising, revealing an impressive overall response rate of 67%, effectively doubling the anticipated response rate when using zanubrutinib alone.

Key Findings from the Study

The data that surfaced from the trial was especially encouraging. Among the patients assessed, one individual achieved a complete response (CR), while three others showed a partial response (PR). These responders exhibited significant reductions in their target lesions, with shrinkages measuring 89%, 78%, and 56%. Furthermore, as of the latest follow-up, six out of the nine enrolled patients remained alive, highlighting notable treatment durability under the investigative combination.

Patient Characteristics and Trial Efficacy

The study comprised nine patients diagnosed with r/r DLBCL, categorized as either germinal center B-cell like (GCB) or activated B-cell like (ABC) subtype. Understanding these differences is crucial, as the ABC subtype often carries a more challenging prognosis for patients. The median age among the participants was 55 years, with many having previously undergone multiple lines of therapy.

Responses in Non-GCB DLBCL Patients

In the subset of ABC DLBCL patients, the efficacy of the drug combination was particularly striking. Out of six patients, four experienced an objective response, contributing to a disease control rate of 83%. This showcases SLS009's capability to enhance treatment outcomes in hard-to-treat lymphoma patients.

Safety Profile and Future Implications

Safety monitoring revealed that 55.6% of participants experienced grade ? 3 adverse events (AEs), aligning with the established safety profile of zanubrutinib. It’s worth noting that genetic analyses of the enrolled patients indicated no presence of MYD88 or CD79B mutations, typically associated with improved responses to BTK inhibitors. Interestingly, the one patient who achieved a complete response possessed MYC amplification and also carried TP53 mutations, suggesting that SLS009 could possibly counteract drug resistance often seen in TP53-mutated cancers.

Looking Ahead for SELLAS Life Sciences

Angelos Stergiou, the President and CEO of SELLAS, expressed enthusiasm over these findings, emphasizing the innovative collaboration that propelled these results. The company's focus extends beyond DLBCL, with ongoing developments in other cancer indications including acute myeloid leukemia and spliceosome-chromatin mutations. Dragan Cicic, the Chief Development Officer, echoed this sentiment by noting the essential role of uncovering genetic biomarkers to navigate drug development effectively.

About SELLAS Life Sciences Group

SELLAS Life Sciences Group, Inc. is dedicated to advancing novel therapeutic solutions for various cancer types. Among its noteworthy products is GPS, which targets the WT1 protein and demonstrates potential for addressing hematologic malignancies and solid tumors alike. Meanwhile, SLS009 stands out as an innovative CDK9 inhibitor, presenting reduced toxicity and enhanced potency in treating malignancies with poor prognostic factors.

Frequently Asked Questions

What is SLS009 and its role in the trial?

SLS009 (tambiciclib) is a selective CDK9 inhibitor explored for its effectiveness in r/r DLBCL patients, aiming to improve treatment responses.

What were the key findings from the Phase 2a trial?

The trial reported a 67% overall response rate with notable tumor shrinkage in several patients, indicating promising efficacy.

Who conducted the Phase 2a trial?

The trial was conducted and funded by GenFleet Therapeutics in a collaborative effort with SELLAS Life Sciences Group.

What is the potential impact of these results?

The results may pave the way for new treatment options for DLBCL patients, especially those with challenging prognoses.

How does SELLAS plan to move forward following these results?

SELLAS intends to continue exploring trial extensions while maintaining a focus on other oncology programs, enhancing their therapeutic portfolio.

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