Plinabulin

Median PFS at 8.63 months and Disease Control Rate of 89.5% in Previously Treated NSCLC Patients after Progression on PD-1/L1 Monotherapy or in Combination with Platinum Doublet ChemotherapyFLORHAM PARK, N.J., Sept. 16, 2024 (GLOBE NEWSWIRE) -- BeyondSpring Inc. (NASDAQ: BYSI) (“BeyondSpring” or the “Company”), a clinical-stage global biopharmaceutical company developing innovative cancer therapies, today presented interim phase 2 data on the 303 Study, a study in 2L/3L non-small cell lung cancer (NSCLC) after disease progression on 1L PD-1/L1 inhibitors with and without chemotherapy, with financial support from Merck & Co., Inc’s (NYSE: MRK, known as MSD outside of the United States and Canada) Investigator Studies Program and provision of study drug, at the European Society for Medical Oncology (ESMO) Congress 2024, on September 14, 2024 in Barcelona, Spain. Docetaxel remains the standard of care for patients with 2L/3L NSCLC without targetable alterations who progress on 1L immune checkpoint inhibitors (ICI) with and without standard chemotherapy, with an overall response rate (ORR) of 12.8% and median PFS (mPFS) of 3.7 months in TROPION Lung-01 phase 3 studies. In metastatic NSCLC resistant to previous PD-1/L1 therapy1, PD-L1 and CTLA-4 inhibition alone or in combination with hypofractionated radiotherapy produced limited clinical benefits with ~11.5% ORR. This investigator-initiated, single-arm, open-label, phase 2 study (KeyPelms-004 or 303 Study) evaluates the efficacy and safety of a triple combination regimen of pembrolizumab plus plinabulin/docetaxel (NCT05599789). The study intends to enroll a total of 47 patients and is ongoing at Peking Union Medical College Hospital, Beijing, China with the principal investigator Dr. Mengzhao Wang, Chief of the Department of Respiratory and Critical Care Medicine. Here, we report on a planned formal interim analysis of 19 patients. At the database lock on 29 April 2024, 29 patients were enrolled and 19 were evaluable for stage 1 data analysis. All patients experienced disease progression after initial clinical benefit with ICI. Of the 19 evaluable patients (median age at 66.4 years; ranged 50-76 years), 68.4% were male and 31.6% were female; 57.9% were current or former smokers. Histology included 57.9% patients with non-squamous cell carcinoma and 42.1% with squamous cell carcinoma. The median follow-up was 8.67 months. Below is an efficacy summary table. Primary Endpoint Plinabulin + Pembrolizumab + Docetaxel (n=19)Confirmed ORR (RECIST 1.1)21.1% Secondary Endpoints Median PFS (RECIST 1.1)8.63 M(6 M PFS rate: 67.1%;12 M PFS rate: 49.2%)Median OS (Overall Survival)Not reachedMedian DoR (Duration of Response)11.40 MDisease Control Rate(PR + SD > 4 months)89.5% The combination was well tolerated. 52.6% of patients experienced grade 3 or higher treatment-related adverse effects. There were no treatment-related deaths. “Plinabulin is a potent inducer of dendritic cell or DC maturation that leads to T cell activation. DC is the most potent antigen presenting cell (APC). This unique mechanism of action reinforces anti-tumor immune response with the potential to overcome acquired ICI resistance, which may derive from APC pathway mutation or T cell exhaustion. Compared to historical controls of 3-4 months of median PFS2, this study’s early efficacy data doubled median PFS to 8.6 months, with an impressive disease control rate of almost 90%, which is encouraging and clinically meaningful for this severe unmet need,” said Dr. Mengzhao Wang, principal investigator at Peking Union Medical College Hospital. ESMO Congress 2024 (1330P): Phase 2 Study of Pembrolizumab plus Plinabulin and Docetaxel for Patients (pts) with Metastatic NSCLC after Failure on First-line Immune Checkpoint Inhibitor Alone or Combination Therapy: Initial Efficacy and Safety Results on Immune Re-sensitization Presenter: Dr. Yan Xu, Peking Union Medical College Hospital, Beijing, ChinaPoster Session: NSCLC, metastatic References: Schoenfeld et al. 2022, Lancet Oncology 23:279-291TROPION Lung-01: https://doi.org/10.1200/JCO-24-01544 About PlinabulinPlinabulin is a novel first-in-class dendritic cell maturation therapeutic with durable anti-cancer benefit observed across multiple clinical studies. As a reversible binder at a distinct tubulin pocket, plinabulin does not change tubulin dynamics or antagonize tubulin stabilizing agents, such as docetaxel, which contributes to its differentiated activity and tolerability compared to other tubulin binders. In addition, plinabulin significantly reduces chemotherapy induced neutropenia and could thereby increase docetaxel tolerability. Over 700 patients have been treated with plinabulin with good tolerability. About KeyPelms-004 or 303 Study303 Study is an open-label, single-arm Phase 2 Study of Plinabulin plus docetaxel and pembrolizumab for previously treated patients with metastatic NSCLC and progressive disease after anti-PD-(L)1 inhibitor alone or in combination with platinum-doublet chemotherapy. This study evaluates the efficacy and safety of this triple combination and is being conducted at Peking Union Medical College Hospital, Beijing, China. The regimen includes Pembrolizumab 200 mg IV every 3 weeks (Q3W) on Day 1, Docetaxel 75 mg/m2 IV Q3W on Day 1 and Plinabulin 30mg/m2 IV Q3W on Day 1 in a 21-day cycle. The primary endpoint is investigator-based ORR (RECIST 1.1). The secondary endpoints include PFS, OS, DoR, and safety. The study intends to enroll 47 patients with a formal interim analysis of 19 patients enrolled. The study is funded by Merck’s Investigator Studies Program with provision of study drug and financial support.​​About BeyondSpringBeyondSpring is a global clinical-stage biopharmaceutical company developing innovative therapies to improve clinical outcomes for patients with high unmet medical needs. The Company is advancing its first-in-class lead asset, Plinabulin, a potent inducer of dendritic cell maturation, in late-stage clinical development as a direct anti-cancer agent in NSCLC and a variety of cancer indications. BeyondSpring’s pipeline also includes three preclinical immuno-oncology assets. Additionally, BeyondSpring is an equity owner of SEED Therapeutics, Inc which is a pioneer in Target Protein Degradation technology and its application in innovative drug development. Learn more by visiting https://beyondspringpharma.com. Investor Contact:IR@beyondspringpharma.com Media Contact:PR@beyondspringpharma.com

Plinabulin/Docetaxel Combination Demonstrated Favorable Benefit/Risk Ratio over Docetaxel Alone: Significant Improvement in Overall Survival, Progression Free Survival, and Objective Response, with additional Significant Reduction of Grade 4 Neutropenia (>80% relative reduction), and Improved Patients’ Quality of LifeFLORHAM PARK, N.J., Sept. 16, 2024 (GLOBE NEWSWIRE) -- BeyondSpring Inc. (NASDAQ: BYSI) (“BeyondSpring” or the “Company”), a clinical-stage global biopharmaceutical company developing innovative cancer therapies, presented final data on Dublin-3 study (2L/3L EGFR wild-type NSCLC) focusing on safety outcomes on September 14, 2024 at European Society for Medical Oncology (ESMO) Congress 2024 in Barcelona, Spain. Full data on Dublin-3 study was published on September 9, 2024 in the Lancet Respiratory Medicine (https://doi.org/10.1016/S2213-2600(24)00178-4). Docetaxel remains the standard of care for patients with 2L/3L NSCLC without targetable alterations despite severe neutropenia (>40%) that greatly impair patients’ quality of life. Six recent phase 3 studies in patients with EGFR wild-type NSCLC who were previously treated with immune checkpoint inhibitors failed to show overall survival (OS) benefit compared with docetaxel (SAPPHIRE, LEAP-008, CONTACT01, EVOKE-01, CARMEN-LC03, and CANOPY-2). Two phase 3 studies (LUNAR and TROPION-Lung01) showed positive but mixed outcomes compared with docetaxel. The DUBLIN-3 study was a multicenter, single-blinded, randomized controlled trial that enrolled patients from 58 medical centers across Australia, China, and the USA. 559 patients with epidermal growth factor receptor (EGFR) wild-type NSCLC were randomly assigned (1:1) to receive either docetaxel and plinabulin (n=278) or docetaxel and placebo (n=281). The plinabulin/docetaxel combination significantly improved overall survival (OS), progression-free survival (PFS), and objective response rate (ORR) compared to docetaxel alone. (Click here for related press release.) This poster presentation focused on plinabulin and docetaxel combination safety vs. docetaxel alone, as shown below: The combination is well tolerated: Similar percentages of patients experienced ≥1TEAE (treatment emergent adverse events); 99.6% in the combination arm and 99.3% in the docetaxel arm. There was less grade 4 TEAE in the combination arm (19.0%) vs. 42.8% in the docetaxel arm.The combination had >80% relative reduction in Grade 4 neutropenia (p<0.001): The combination arm had a 5.3 % Grade 4 neutropenia in Cycle 1 Day 8 compared to 27.8% in docetaxel alone (81% reduction, p<0.0001). The combination arm had a 5.1 % Grade 4 neutropenia in all cycles Day 8 compared to 33.6% in docetaxel alone (85% reduction, p<0.0001). In addition, hospital admission due to febrile neutropenia was lower in the combination arm (7 [2.6%] patients) vs. docetaxel arm (14 [5.0%] patients).The combination had reduced use of granulocyte-colony stimulating factor (G-CSF) in all cycles: Post-hoc analysis showed reduced G-CSF use in the combination arm (152 [56%] patients) vs. docetaxel arm (182 [66%] patients) and at cycles 1 to 4.The combination had improved quality-of-life (QoL) based on Q-TWiST data: Exploratory analysis showed better QoL based on Q-TWiST in the combination arm, with a clinically meaningful relative gain to the docetaxel arm of 18.5%(p=0.0393).The combination had a significant reduction in cycle-adjusted serious adverse events (SAE): Patients randomized to the combination received more cycles of treatment. When cycles were adjusted for SAEs, plinabulin significantly decreased Grade 3/4 SAEs (p=0.0235) and Grade 4 SAEs (p<0.0001).The combination had manageable side effects: Plinabulin induced mostly asymptomatic transient hypertension, which mostly resolved within 4-6 hours after infusion without medication. In addition, plinabulin induced GI side effects, including nausea, vomiting, and diarrhea, which were effectively managed following a protocol adjustment to add the prophylactic use of antiemetics and increase time of infusion. “NSCLC patients without targetable alterations whose disease has progressed on previous platinum-based therapy have a poor prognosis. Docetaxel is the current standard of care with >40% severe neutropenia and poor quality of life. In second or third-line NSCLC patients with EGFR wild-type, the phase 3 data suggest that adding plinabulin to docetaxel has a favorable benefit/risk ratio compared to docetaxel alone in significantly improving anti-cancer efficacy, and significantly reducing severe neutropenia and improving quality of life. This combination could be considered as a new option for second or third-line NSCLC patients without driver mutation, which is a severe unmet medical need,” said Dr. Feinstein, one of the lead principal investigators of Dublin-3 study at Piedmont Cancer Center, Atlanta. ESMO Congress 2024 Presentation (1358P): Plinabulin/Docetaxel Versus Docetaxel in Survival Benefits of 2L/3L EGFR Wild-Type NSCLC after Platinum Regimens (DUBLIN-3): a Randomized Phase 3 Trial Presenter: Dr. Trevor M. FeinsteinPoster Session: NSCLC, metastatic Citation:Han B., et al. Plinabulin plus docetaxel versus docetaxel in patients with non-small-cell lung cancer after disease progression on platinum-based regimen (DUBLIN-3): a phase 3, international, multicentre, single-blind, parallel group, randomised controlled trial. Lancet Respir Med. 2024 Sep 09: S2213-2600(24)00178-4. About PlinabulinPlinabulin is a novel first-in-class dendritic cell (DC) maturation therapeutic with durable anti-cancer benefit observed across multiple clinical studies. As a reversible binder at a distinct tubulin pocket, plinabulin does not change tubulin dynamics or antagonize tubulin stabilizing agents, such as docetaxel, which contributes to its differentiated activity and tolerability compared to other tubulin binders. Importantly, clinical data suggests that plinabulin enhances the cancer immunity cycle when used sequentially with chemotherapy/radiation and a checkpoint inhibitor. In addition, plinabulin significantly reduces chemotherapy induced neutropenia and could thereby increase docetaxel tolerability. Over 700 patients have been treated with plinabulin with good tolerability. About Dublin-3 StudyDublin-3 NSCLC was a global phase 3 randomized, controlled clinical trial comparing the combination of plinabulin and docetaxel to an active control arm of docetaxel alone (1:1 randomization) in second- and third-line NSCLC patients who had failed platinum doublet therapies, and who were epidermal growth factor receptor (EGFR) wild-type. Docetaxel was given on Day 1 in both arms at 75 mg/m2 in each 21-day cycle. Plinabulin was given on Day 1, one hour after docetaxel, and on Day 8, both at 30 mg/m2 in each cycle. The primary endpoint for the study was OS, and secondary endpoints were PFS, ORR, Duration of Response (DoR), Grade 4 neutropenia and Quality of Life. About BeyondSpringBeyondSpring is a global clinical-stage biopharmaceutical company developing innovative therapies to improve clinical outcomes for patients with high unmet medical needs. The Company is advancing its first-in-class lead asset, plinabulin, a potent inducer of dendritic cell maturation, in late-stage clinical development as a direct anti-cancer agent in NSCLC and a variety of cancer indications. BeyondSpring’s pipeline also includes three preclinical immuno-oncology assets. Additionally, BeyondSpring is an equity owner of SEED Therapeutics, Inc which is a pioneer in Target Protein Degradation technology and its application in innovative drug development. Learn more by visiting https://beyondspringpharma.com. Investor Contact:IR@beyondspringpharma.com Media Contact:PR@beyondspringpharma.com