On December 9, 2024 Electra Therapeutics, Inc., a clinical stage biotechnology company developing antibody therapies against novel targets for immunological diseases and cancer, reported the presentation of positive results from the completed Phase 1b study of ELA026 for the treatment of secondary hemophagocytic lymphohistiocytosis (sHLH) (Press release, Electra Therapeutics, DEC 9, 2024, View Source [SID1234648897]). ELA026 is a first-in-class monoclonal antibody that targets SIRP-α/β1/γ on the cell surface of myeloid cells and T lymphocytes, the principal pathological immune cells that induce the cytokine storm and hyperinflammation in sHLH. Targeting SIRP to selectively deplete pathogenic immune cells has potential for broad therapeutic applications in immunology, inflammation and cancer. The results of the ELA026 study in sHLH are being presented today at 2:45 PM PST in an oral session at the American Society of Hematology (ASH) (Free ASH Whitepaper) Annual Meeting in San Diego, CA.

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The Phase 1b study was an open-label, single-arm, multicenter study designed to evaluate the safety and efficacy of ELA026, assess the pharmacodynamic (PD) and pharmacokinetic (PK) profile, and identify a dose regimen for further evaluation in a Phase 2/3 study (NCT05416307). The Phase 1b study demonstrated that for sHLH patients with the poorest prognosis, those with malignancy-associated HLH (mHLH), treatment with ELA026 in frontline settings achieved 100% overall response rate by week 4 and 100% hospital discharge, as well as 92% survival at two months. Various PD and HLH-related biomarkers showed that ELA026 rapidly attenuated inflammation, which correlated with clinical responses.

"ELA026 has shown potential to be a transformative treatment for sHLH, a life-threatening disease with no approved therapies. Compared with available treatment, which may include chemotherapy and single cytokine-directed therapies, ELA026 may offer a safer, more effective approach to address the overwhelming immune reaction in sHLH. The Phase 1b study results showing rapid PD and biomarker effects and improved survival at two months are particularly promising," said Swaminathan P. Iyer, MD, Professor in the Department of Lymphoma/Myeloma at The University of Texas MD Anderson Cancer Center. "There is a growing appreciation that controlling the cytokine storm early in the sHLH disease course is necessary to prevent multiorgan failure and allow for proper treatment of the underlying cancer. It is clear that overcoming this critical early period of hyperinflammation in sHLH provide significant clinical benefits for patients."

"We are highly encouraged by these compelling results for sHLH patients, and Electra is working to advance ELA026 into a pivotal study as rapidly as possible. Through rigor and resolve, our team has pioneered a drug development program targeting SIRP, going from a novel idea to pivotal study readiness in five years," said Kathy Dong, PharmD, MBA, President and CEO of Electra Therapeutics. "We have demonstrated the therapeutic value of selectively depleting pathological immune cells to modulate inflammation and look forward to applying this novel approach with ELA026 and our pipeline to expand to other diseases with high unmet need."

Phase 1b Study Results Presented in Oral Session at ASH (Free ASH Whitepaper)
The oral presentation at the ASH (Free ASH Whitepaper) Annual Meeting, entitled "ELA026, a monoclonal antibody targeting signal regulatory protein-α/β1/γ, rapidly controls inflammation and improves 2-month survival in treatment-naïve malignancy-associated hemophagocytic lymphohistiocytosis," is being presented by the lead author, Abhishek Maiti, MD, Assistant Professor in the Department of Leukemia at The University of Texas MD Anderson Cancer Center. This presentation was featured in the section "Granulocytes, Monocytes, and Macrophages: From Inflammation to Hemophagocytic Lymphohistiocytosis." The clinical results presented for ELA026 described the analysis of 12 mHLH patients treated in frontline settings in the completed Phase 1b clinical study. Highlights of the Phase 1b results are as follows:

ELA026 was well tolerated with manageable adverse events.
ELA026 demonstrated rapid PD effects on monocytes and lymphocytes, followed by reduction of markers of inflammation, including ferritin, sCD25, and C‑reactive protein (CRP).
mHLH patients receiving ELA026 in frontline settings achieved treatment outcomes that surpass those observed with available therapies (existing treatments used in the absence of an approved therapy for sHLH):
– 100% overall response rate (12 of 12) ~40% with available therapies.1

– 100% hospital discharge alive (11 of 11, 1 patient withdrew from study before evaluation of this endpoint) inpatient mortality of 20-30% with available therapies.2

– 92% survival at Day 60 (11 of 12) ~50% with available therapies.3

"Because sHLH is a complex, rapidly progressing disease with limited development precedents, advancing ELA026 required a focused approach that our Electra team boldly took on, in collaboration with leading researchers and clinicians. It is gratifying to see the positive Phase 1b results for ELA026 and the potential to improve outcomes for sHLH patients who face this life-threatening condition," said Kim‑Hien Dao, DO, PhD, Chief Medical Officer at Electra. "We have a clear path forward based on recent alignment with the US FDA on the pivotal study design and are moving towards initiating a global Phase 2/3 study in 2025 to address the significant disease burden in sHLH."

About Secondary Hemophagocytic Lymphohistiocytosis (sHLH)
Secondary hemophagocytic lymphohistiocytosis (sHLH) is a rare, life-threatening hyperinflammatory disease for which there is no approved treatment. It can be triggered by cancer, infection, autoimmune disease, or immunotherapy. sHLH is associated with a severe inflammatory response for which patients require immediate intervention. Without treatment, patients may experience multiorgan failure and death. sHLH is associated with high mortality early in the disease course, with malignancy-associated HLH (mHLH) patients having a mortality rate of approximately 50% at two months with available therapies.

On December 9, 2024 SELLAS Life Sciences Group, Inc. (NASDAQ: SLS) ("SELLAS" or the "Company"), a late-stage clinical biopharmaceutical company focused on the development of novel therapies for a broad range of cancer indications, reported additional data from the expansion cohorts in the Phase 2 trial of SLS009, a highly selective CDK9 inhibitor, in relapsed/refractory acute myeloid leukemia (r/r AML) (Press release, Sellas Life Sciences, DEC 9, 2024, View Source [SID1234648913]).

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"We are highly encouraged by the emerging data, which continue to show the potential of SLS009 to transform outcomes of these heavily pretreated AML patients," said Angelos Stergiou, MD, ScD h.c., President and Chief Executive Officer of SELLAS. "In the Cohort 3, the optimal dosing regimen of 30 mg BIW, in patients relapsed or refractory to venetoclax-based regimens, the median overall survival has not been reached but exceeds 7.7 months at latest follow-up, marking a significant milestone for patients in this setting, where the expected mOS is historically around 2.5 months. In addition, we are seeing more than 50% ORR to date in our expansion cohorts in patients with AML-myelodysplasia-related changes (AML-MRC) with ASXL1 mutation and mutations and cytogenic changes other than ASXL1, similar to the previously reported ORR in Cohort 3. We set up an aggressive threshold of 33% response rate before the trial started, and to date we achieved 56% in 5/9 evaluable patients. The rapid enrollment in the expansion cohorts further highlight the critical need for new treatments for our target patient population. These results support the potential of SLS009 to become an important new therapeutic option for this underserved patient population."

Key Highlights from the updated topline data:

As of December 4, 2024, data cutoff, 14 patients were enrolled in Cohort 3 and 14 in Cohort 4 and 5, of which 9 were evaluable at the time of analysis.
At latest follow-up, the mOS has not been reached yet but has exceeded 7.7 months in Cohort 3. This is particularly significant as the expected mOS for patients in this setting is typically 2.5 months.
In expansion cohorts 4 and 5, in patients with AML-myelodysplasia-related changes (AML-MRC) with ASXL1 mutation (cohort 4) and mutations and cytogenic changes other than ASXL1 (cohort 5) the ORR was 56% in 9 evaluable for efficacy patients.
SLS009 was well-tolerated with no new safety signals observed to date as the regimen remains safe in additional patients enrolled to date.
The Phase 2 clinical trial of SLS009 is an open-label, single-arm, multi-center study designed to evaluate the safety, tolerability, and efficacy of SLS009 in combination with venetoclax and azacitidine at two dose levels, 45 and 60 mg. In the 60 mg dose cohort patients were randomized into either a 60 mg dose once per week or a 30 mg dose two times per week. The trial was expanded to include two additional cohorts, one with ASXL1 mutated AML patients and one with patients with myelodysplasia-related molecular abnormalities other than ASXL1. In addition to response and survival analyses, the study aims to identify biomarkers for the target patient population and enrichment for further trials. For more information on the study, visit clinicaltrial.gov identifier NCT04588922.

On December 9, 2024 Poseida Therapeutics, Inc. (Nasdaq: PSTX), a clinical-stage allogeneic cell therapy and genetic medicines company advancing differentiated non-viral treatments for patients with cancer, autoimmune and rare diseases, reported interim clinical data from its Phase 1 trial of P-BCMA-ALLO1 in patients with relapsed/refractory multiple myeloma (RRMM), including new profiling of patient responses from Arm C, an optimized lymphodepletion arm (Press release, Poseida Therapeutics, DEC 9, 2024, View Source [SID1234648929]). The P-BCMA-ALLO1 data are being presented, along with two additional Company poster presentations covering new preclinical data for P-CD19CD20-ALLO1 and a patient case study demonstrating the reactivation of a Poseida autologous CAR-T therapy with a T-cell engager, at the 66th ASH (Free ASH Whitepaper) Annual Meeting and Exposition being held in San Diego on December 7-10, 2024.

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P-BCMA-ALLO1 is an investigational non-viral, stem cell memory T cell (TSCM)-rich allogeneic CAR-T cell therapy in Phase 1/1b clinical development for the treatment of patients with RRMM. P-CD19CD20-ALLO1 is an investigational, non-viral TSCM-rich allogeneic CAR-T cell therapy in Phase 1 clinical development for the treatment of patients with B-cell malignancies and is the Company’s first dual CAR-T program. P-BCMA-ALLO1 and P-CD19CD20-ALLO1 are being developed in collaboration with Roche.

"We continue to gain confidence in the potential for P-BCMA-ALLO1 in multiple myeloma, including from the additional sub-analysis of the Phase 1 data presented at ASH (Free ASH Whitepaper)," said Kristin Yarema, Ph.D., President and Chief Executive Officer of Poseida Therapeutics. "We believe the data to-date provide strong validation for our allogeneic cell therapy platform, laying the groundwork for us to extend our non-viral, TSCM-rich approach and drive value with additional clinical programs. This includes P-CD19CD20-ALLO1, our first dual CAR-T supported by preclinical data presented at ASH (Free ASH Whitepaper), and with clinical data anticipated in 2025."

P-BCMA-ALLO1 Phase 1 Data
The poster presentation will highlight Phase 1 clinical data first presented at the 21st International Myeloma Society (IMS) Annual Meeting in September 2024. The data showed a 91% overall response rate (ORR) in Arm C (an optimized lymphodepletion arm), including a 100% ORR in B-cell maturation antigen (BCMA)-naïve patients, and an 86% ORR in those who had received at least one prior BCMA- and/or G protein-coupled receptor class C group 5 member D (GPRC5D)-targeting treatment modality, along with differentiated safety results with no dose-limiting toxicities, low rates of cytokine release syndrome (CRS) and immune effector cell neurotoxicity syndrome (ICANS), all Grade 2 or less, and no graft vs. host disease or Parkinsonism. No patients required anti-myeloma bridging therapy or prophylaxis with steroids or tocilizumab, and there was no invasive apheresis; an average manufacturing wait time, from treatment decision to clinical response, was only 3.5 weeks1 (with a median time to response of 16 days post initial P-BCMA-ALLO1 therapy). The patients in this study had more advanced disease than the myeloma patients studied in clinical trials of approved autologous CAR-T therapies2, and in the intent-to-treat population, 100% of patients were infused with P-BCMA-ALLO1.

New profiling of patient responses from Arm C are included in the ASH (Free ASH Whitepaper) poster presentation. The data from this analysis show consistent P-BCMA-ALLO1 cellular expansion and persistence across different subgroups, including patients that are typically more challenging to treat. Key highlights suggest that P-BCMA-ALLO1:

Cellular kinetics were not impacted by prior BCMA/GPRC5D-targeted therapy
Expands and persists in patients with extramedullary disease (EMD)
P-CD19CD20-ALLO1 Preclinical Data
Preclinical data has demonstrated that P-CD19CD20-ALLO1 delivers high in vitro potency and strong in vivo antitumor activity for either CD19 or CD20 single-positive target cells, as well as double-positive targets. New preclinical data included in the poster presentation show that compared to CD19-single targeting or CD20-single targeting CAR-T cells, P-CD19CD20-ALLO1:

Achieved higher and more durable killing of tumor cells over three rechallenges, even in the presence of only one tumor antigen
Exhibited higher cytotoxicity
Produced higher and more sustained levels of effector cytokines (IL-2, IFN-γ, sFasL, Granzyme A and Granulysin) that play an important role mediating the immune system response to cancers
Showed higher in vivo antitumor efficacy than the CD19-single targeting CAR-T cells
The Company’s P-CD19CD20-ALLO1 Phase 1 clinical trial is enrolling patients with selected B-cell malignancies, with initial clinical data anticipated in 2025.

CAR-T Reactivation with T-cell Engager Case Study
The case study highlights the reactivation of an autologous Poseida CAR-T therapy with a T-cell engager in a patient with relapsed multiple myeloma. The patient attained and remained in stringent complete response over 12 months after CAR-T reactivation. This case highlights the potential of Poseida’s TSCM-based CAR-T therapies to deliver a strong anti-myeloma response with long-term remission and CAR-T cell persistence. The Company believes this is the first time that a T-cell engager has been seen to reactivate a CAR-T therapy.

ASH 2024 Poster Presentations

Title: Late Polyclonal P-BCMA-101 CAR-T Cell Re-expansion and Rapid Complete Response in a Patient with Relapsed Multiple Myeloma Treated with One Cycle of Talquetamab, More Than 3 Years After CAR-T Infusion

Presenting Author: Anupama Kumar, M.D., Assistant Professor, Hematology, Blood & Marrow Transplant, and Cellular Therapy (HBC) Program, University of California, San Francisco (UCSF)
Session: 704. Cellular Immunotherapies: Early Phase Clinical Trials and Toxicities: Poster I
Presentation Date/Time: Saturday, December 7, 2024, 5:30-7:30 p.m. PT (8:30-10:30 p.m. ET)
Room: Halls G-H, San Diego Convention Center
Abstract Number: 2083
Title: P-CD19CD20-ALLO1: Potent Fully Allogeneic CAR-T Therapy Targeting CD19 and CD20 with Superior Efficacy Over Single-Target Products

Presenting Author: Samy Jambon, Ph.D., Poseida Therapeutics
Session: 702. CAR-T Cell Therapies: Basic and Translational: Poster III
Presentation Date/Time: Monday, December 9, 2024, 6:00-8:00 p.m. PT (9:00-11:00 p.m. ET)
Room: Halls G-H, San Diego Convention Center
Abstract Number: 4805
Title: A Phase 1 Study of P-BCMA-ALLO1, a Non-viral, Allogeneic BCMA Directed CAR-T in Relapsed/Refractory Multiple Myeloma (RRMM): Results from Optimized Lymphodepletion Cohort

Presenting Author: Caitlin Costello, M.D., Professor of Medicine, Director of Multiple Myeloma Program, Division of Blood and Marrow Transplant, Moores Cancer Center, University of California, San Diego (UCSD)
Session: 704. Cellular Immunotherapies: Early Phase Clinical Trials and Toxicities: Poster III
Presentation Date/Time: Monday, December 9, 2024, 6:00-8:00 p.m. PT (9:00-11:00 p.m. ET)
Room: Halls G-H, San Diego Convention Center
Abstract Number: 4828
About P-BCMA-ALLO1
P-BCMA-ALLO1 is an allogeneic CAR-T product candidate licensed to Roche targeting B-cell maturation antigen (BCMA) for the treatment of relapsed/refractory multiple myeloma. This allogeneic program includes a VH-based binder that targets BCMA, and interim clinical data presented at IMS in September 2024 support the Company’s belief that T stem cell (TSCM)-rich allogeneic CAR-Ts have the potential to offer effective, safe and reliable treatment addressing unmet needs in multiple myeloma. The FDA has granted P-BCMA-ALLO1 Orphan Drug designation for multiple myeloma and Regenerative Medicine Advanced Therapy (RMAT) designation for adult patients with relapsed/refractory multiple myeloma after three or more prior lines of therapies including a proteasome inhibitor, an immunomodulatory agent and an anti-CD38 antibody.

P-BCMA-ALLO1 is currently being evaluated in a Phase 1/1b trial in patients with multiple myeloma. Additional information about the trial is available at www.clinicaltrials.gov using identifier: NCT04960579.

About P-CD19CD20-ALLO1
P-CD19CD20-ALLO1 is an allogeneic CAR-T cell therapy product candidate being developed for relapsed or refractory B-cell malignancies in partnership with Roche. P-CD19CD20-ALLO1 expresses two fully functional CAR molecules to target cells that express either CD19 or CD20. The dual targeting approach employed in P-CD19CD20-ALLO1 aims to overcome the antigen escape limitations of CD19-only targeted CAR-T therapies by simultaneously targeting both CD19 and CD20. In addition to the dual targeting, P-CD19CD20-ALLO1 uses a novel CD19 binder that showed greater potency in in vivo preclinical models when compared to the canonical FMC63 Single-chain variable fragment (scFv) binder. P-CD19CD20-ALLO1 is an off-the-shelf CAR-T therapy for which patients do not have to undergo apheresis and wait for cells to be manufactured, which can potentially overcome the limitation of autologous CAR-T therapies associated with significant manufacturing times. P-CD19CD20-ALLO1 is being studied in a Phase 1 study in B-cell malignancies (www.clinicaltrials.gov using identifier: NCT06014762). Building on the transformative potential of the CAR-T modality beyond oncology, the Company has recently submitted investigational new drug (IND) applications to the U.S. Food and Drug Administration (FDA) to investigate this program’s potential for patients with multiple sclerosis and systemic lupus erythematosus.

On December 9, 2024 Lomond Therapeutics, a spin-out of Eilean Therapeutics LLC, a precision oncology-focused discovery and development platform, reported results from single ascending dose Phase 1 clinical studies of oral once-daily lonitoclax (Press release, Lomond Therapeutics, DEC 9, 2024, View Source [SID1234648945]). In this series of healthy volunteer studies, no significant safety signals were observed at exposures where robust inhibition of BCL-2 was achieved, as measured via ex vivo activation of caspase in CLL primary cells. Furthermore, administration of itraconazole, a strong inhibitor of cytochrome P450 3A4 metabolism, did not significantly alter lonitoclax exposures. These results emphasize important advantages over venetoclax and venetoclax-like molecules in safety, tolerability, and feasibility of outpatient treatment, enabling lonitoclax to be used to safely treat CLL and AML patients.

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"The positive PK, PD, and safety findings from our Phase 1 trial mark the first clinical data that underscores the differentiated profile and promising potential of lonitoclax compared to venetoclax and venetoclax-like molecules for AML, CLL, and potentially other oncology indications patients," said Dr. Iain Dukes, Chief Executive Officer of Lomond Therapeutics. "We are excited to embark on the next phase of development for lonitoclax with an ongoing CLL study."

About Lonitoclax
Lonitoclax is a next generation BCL-2 inhibitor that has demonstrated best-in-class molecular pharmacology with the highest selectivity against BCL2, a key pro-survival protein that is overexpressed in many cancers. To mitigate the hematologic and immune toxicities observed with venetoclax, lonitoclax was designed with a unique binding mode to improve selectivity for Bcl-2 over Bcl-xL. In addition, a shorter half-life and reduced P4503A4 inhibition properties were built into the molecule to mitigate tumor lysis syndrome and drug accumulation risk, respectively. Lonitoclax has demonstrated monotherapy activity in pre-clinical models, as well as synergistic activity when combined with azacitidine, FLT3 inhibitors, and menin inhibitors in AML xenograft models. Unlike venetoclax, lonitoclax had minimal immunosuppressive activity on B cells, CD8 T cells, and NK cells in preclinical models.

On December 09, 2024 AngioDynamics, Inc. (NASDAQ: ANGO), a leading and transformative medical technology company focused on restoring healthy blood flow in the body’s vascular system, expanding cancer treatment options and improving patient quality of life, reported it received U.S. Food and Drug Administration (FDA) 510(k) clearance for the NanoKnife System for prostate tissue ablation (Press release, AngioDynamics, DEC 9, 2024, View Source [SID1234648961]).

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"These efforts are designed to accelerate the adoption of the NanoKnife System, redefine the standard of care for prostate health, and deliver treatment outcomes that patients and physicians need. AngioDynamics is committed to driving meaningful impact through this revolutionary technology, providing new hope to patients and improved quality of life."

The Company received clearance for the NanoKnife System for prostate tissue ablation following the completion of the pivotal PRESERVE clinical study and submission of results to the FDA in September. The study evaluated the safety and effectiveness of the system for ablating prostate tissue in patients with intermediate-risk prostate cancer (PCa). Conducted in collaboration with the Society of Urologic Oncology Clinical Trials Consortium (SUO-CTC), PRESERVE enrolled 121 patients across 17 clinical sites.

"We are incredibly proud to receive FDA clearance for the NanoKnife System’s use in prostate tissue," said Jim Clemmer, President and Chief Executive Officer of AngioDynamics. "This milestone is the first step in recognizing our vision to become the standard, function-preserving treatment for men with prostate tumors. The NanoKnife System minimizes the life-altering complications often associated with traditional treatments by selectively targeting prostate tissue while preserving critical functions. As we expand our global footprint and increase access to our technology, we are launching comprehensive education and awareness campaigns to empower physicians with hands-on training and clinical support while engaging patients through innovative outreach initiatives."

Mr. Clemmer added, "These efforts are designed to accelerate the adoption of the NanoKnife System, redefine the standard of care for prostate health, and deliver treatment outcomes that patients and physicians need. AngioDynamics is committed to driving meaningful impact through this revolutionary technology, providing new hope to patients and improved quality of life."

The PRESERVE clinical study met its primary effectiveness endpoint demonstrating the performance of the NanoKnife System for the ablation of prostate tissue in patients with intermediate-risk PCa. At 12-months post-procedure, 84.0% of men were free from in-field, clinically significant disease. In addition, the study demonstrated strong quality of life outcomes with short-term urinary continence being preserved (96.6% at baseline, 95.4% at 12-months) and the ability to maintain erections sufficient for intercourse only decreasing 9% compared to baseline (80.7% to 71.7%).1

The study’s results validated the robust safety and clinical efficacy profile of the NanoKnife System, reinforcing findings from more than 32 clinical studies performed around the world involving over 2,600 patients.1

Prostate cancer is the second most common cancer in men worldwide, with approximately 1.5 million new cases diagnosed annually.2 Many of these patients seek alternatives to radical procedures that can lead to significant, long-term urological side effects.3 The NanoKnife System is the first and only non-thermal, radiation-free, ablation technology designed to treat prostate tissue by using IRE technology, offering patients a minimally invasive option for prostate treatment.

The NanoKnife System delivers an innovative alternative to conventional radical surgery or radiotherapy, which often results in significant dysfunction in urinary continence and erectile potency.4 With its non-thermal approach, the system is engineered to preserve vital structures inside and outside the prostate, offering patients improved outcomes, reduced recovery times, and enhanced quality of life.5

For important risk information, visit View Source

About the NanoKnife System

The NanoKnife System utilizes Irreversible Electroporation (IRE) technology to effectively destroy targeted cells without the use of thermal energy by delivering high-voltage pulses, creating permanent nanopores within the cell membrane. This stimulus induces an apoptotic-like cellular death in the targeted tissue, resulting in a complete ablation of the targeted tissue.6 Visit nanoknife.com for full product information.

United States: The NanoKnife System with six outputs is indicated for surgical ablation of soft tissue, including prostate tissue.

Canada: The NanoKnife System is a medical device for cell membrane electroporation. Electroporation is a phenomenon that occurs in cell membranes as cells are exposed to an electrical field of sufficiently high intensity. The electric field acts as a physical stimulus, bringing about alterations in cell membranes that result in increased permeability.

European Union: The NanoKnife System is indicated for the ablation of prostate tissue in patients with intermediate risk prostate cancer.