On December 8, 2025 Orum Therapeutics ("Orum" or the "Company") (KRX: 475830), a public biotechnology company pioneering the field of degrader-antibody conjugates (DACs), reported the presentation of preclinical data for ORM-1153 at the 67th American Society of Hematology (ASH) (Free ASH Whitepaper) Annual Meeting, taking place December 6 to 9, 2025, in Orlando, Florida. ORM-1153 is a novel CD123-targeting DAC designed to deliver Orum’s proprietary GSPT1-degrading payload selectively into cancer cells to achieve targeted protein degradation and antitumor activity in acute myeloid leukemia (AML) and other CD123-positive hematological malignancies.

Schedule your 30 min Free 1stOncology Demo!
Discover why more than 1,500 members use 1stOncology™ to excel in:

Early/Late Stage Pipeline Development - Target Scouting - Clinical Biomarkers - Indication Selection & Expansion - BD&L Contacts - Conference Reports - Combinatorial Drug Settings - Companion Diagnostics - Drug Repositioning - First-in-class Analysis - Competitive Analysis - Deals & Licensing

                  Schedule Your 30 min Free Demo!

"These data highlight ORM-1153 as a differentiated therapeutic candidate designed to address the need for more effective and better-tolerated treatments for acute myeloid leukemia," said Sung Joo (SJ) Lee, Ph.D., Founder and CEO of Orum Therapeutics. "AML remains one of the most challenging hematologic cancers to treat, with frequent relapse and limited options, particularly for patients with TP53-mutant disease. These data demonstrate the potential of ORM-1153 to achieve potent antitumor activity with a differentiated safety profile, addressing long-standing limitations of current AML therapies and further validating the versatility of our targeted protein degrader approach."

The preclinical data presented at ASH (Free ASH Whitepaper) show that ORM-1153 drives efficient, CD123-dependent internalization and degradation of GSPT1, resulting in strong and durable antitumor activity in AML models, including TP53-mutant disease. In comparative studies, ORM-1153 demonstrated approximately 1,000-fold higher potency than the unconjugated degrader payload and produced dose-dependent tumor regression in a disseminated AML xenograft model, with complete and durable responses at the highest dose level.

Importantly, ORM-1153 maintained a favorable tolerability profile and showed minimal effects on normal hematopoietic progenitors in colony-forming assays, suggesting potential for a differentiated therapeutic window compared with current standard-of-care. Together, these findings support ORM-1153 as a promising candidate for the treatment of AML and other CD123-positive hematologic malignancies.

About Orum’s TPD² Approach

Orum’s unique Dual-Precision Targeted Protein Degradation (TPD²) approach builds novel targeted protein degraders combined with the precise cell delivery mechanisms of antibodies to generate innovative, first-in-class, cell-selective TPDs for the treatment of cancer and other serious diseases. Orum has developed new targeted protein degrader payloads to specifically degrade an intracellular target protein within cancer cells via the E3 ubiquitin ligase pathway. Conjugated to antibodies, the payloads are designed to be delivered specifically to target cells and precisely degrade the intracellular target protein of interest.

(Press release, Orum Therapeutics, DEC 8, 2025, View Source [SID1234661268])

On December 8, 2025 Pierre Fabre Pharmaceuticals Inc., reported updated results presented at the 67th American Society of Hematology (ASH) (Free ASH Whitepaper) Annual Meeting of the pivotal Phase 3 ALLELE study of tabelecleucel in adults and children with R/R EBV+ PTLD following HCT or SOT. The two abstracts included sub-analyses of pediatric patients and by prior therapy.

Schedule your 30 min Free 1stOncology Demo!
Discover why more than 1,500 members use 1stOncology™ to excel in:

Early/Late Stage Pipeline Development - Target Scouting - Clinical Biomarkers - Indication Selection & Expansion - BD&L Contacts - Conference Reports - Combinatorial Drug Settings - Companion Diagnostics - Drug Repositioning - First-in-class Analysis - Competitive Analysis - Deals & Licensing

                  Schedule Your 30 min Free Demo!

"These two sub-analyses highlight the potential of tabelecleucel to improve outcomes for patients, both pediatric and adult, with R/R EBV+ PTLD who after undergoing a potentially life-saving solid organ or hematopoietic cell transplant suddenly face yet another life-threatening illness," said presenter and clinical investigator, Dr. Sarah Nikiforow, Assistant Professor, Stem Cell Transplantation, Dana-Farber Cancer Institute. "The updated data support the potential of tabelecleucel as an important advancement in addressing the significant unmet need for patients with EBV+ PTLD, who currently have no FDA-approved treatment options and may experience poor overall survival of only weeks to a few months following the failure of standard treatment."

ALLELE is an ongoing multicenter, open-label Phase 3 study. This analysis encompassed a larger cohort of 86 patients (29 HCT, 57 SOT). In the study, patients received a median of two treatment cycles. Each cycle of tabelecleucel consisted of three infusions given on days 1, 8 and 15 with an imaging assessment of efficacy on day 28.

The updated findings showed patients receiving tabelecleucel had an objective response rate (ORR) of 47.7% with the HCT cohort achieving an 48.3% ORR and SOT cohort achieving a 47.4% ORR. The median (95% CI) overall survival (OS) from Kaplan-Meier survival estimates for the HCT cohort was 18.6 months. For the SOT cohort, median OS was not estimable as more than half of the patients remained in follow-up. In a sub-analysis of treatment response by prior therapy in SOT patients, ORR was 52.4% for those receiving rituximab and 44.4% for those receiving rituximab and chemotherapy.

Safety findings presented were consistent with previously published data. Serious adverse events (SAEs) were reported in 58.6% of HCT and 66.7% of SOT patients. These events were related to study treatment in 1 HCT patient and 7 SOT patients. Fatal SAEs were reported in 5 HCT and 9 SOT patients, and none were reported by investigators to be treatment related. Pyrexia was reported in 1 SOT patient and considered as a potential sign of cytokine release syndrome possibly related to treatment. In the updated ALLELE study data, there were no reports of tumor flare or infusion reactions, immune effector cell-associated neurotoxicity syndrome, or transmission of infectious diseases. No events of graft vs host disease or organ rejection were reported as tabelecleucel related.

A new sub-analysis of 12 pediatric patients less than 17 years of age found the ORR was 50.0% with complete response reported in 4 of 12 patients, and partial response observed in 2 of 12 patients. Efficacy and safety observed in the pediatric sub-group was consistent with that reported in the overall population. Six patients developed treatment emergent adverse events (TESAEs); 4 TESAEs in 2 patients were considered treatment related. Fatal SAEs were reported in 2 patients, neither considered related to treatment. There were no reports of tumor flare, infusion reactions, immune effector cell-associated neurotoxicity syndrome, graft vs. host disease, transmission of infection or bone marrow/solid organ transplant rejection.

"The growing body of evidence supporting the efficacy and safety of tabelecleucel in treatment of people living with EBV+PTLD enhances our confidence in the potential of this innovative cell therapy. These patients have undergone a difficult journey to receive a life-saving transplant only to be diagnosed with this ultra rare form of cancer and they deserve an effective treatment option following failure of standard-of-care therapy," said Adriana Herrera, Chief Executive Officer of Pierre Fabre Pharmaceuticals Inc., the Pierre Fabre Laboratories pharmaceutical subsidiary in the United States. "We look forward to our FDA target action date in January 2026 and if approved, the opportunity to address the significant unmet medical need of these patients who urgently need new treatment options."

A BLA for tabelecleucel is currently under FDA review with a target action date of January 10, 2026. The application is granted priority review for tabelecleucel indicated as monotherapy for treatment of adult and pediatric patients two years of age and older with EBV+ PTLD who have received at least one prior therapy including an anti-CD20 containing regimen. The BLA is supported by pivotal study data from the ALLELE study and supportive data covering more than 430 patients treated with tabelecleucel.

About Tabelecleucel
Tabelecleucel is an allogeneic, off-the-shelf, EBV-specific T-cell immunotherapy designed to selectively target and eliminate EBV-infected cells. Unlike autologous CAR-T therapies, allogeneic T-cells are derived from third-party donors and are not genetically modified. T-cells are collected from the blood of healthy donors and activated by exposure to Epstein-Barr virus antigens, enriching for a population of T-cells that recognize EBV. These EBV-specific T-cells are then expanded, characterized, and cryopreserved for future use to treat patients.

About EBV+PTLD
EBV+ PTLD is an ultra-rare, acute, and potentially deadly blood malignancy that occurs after transplantation when patient T-cell immune responses are compromised by immunosuppression. It can impact patients who have undergone allogeneic HCT or SOT. Poor median survival of 3 weeks and 4.1 months for HCT and SOT, respectively, is reported in EBV+ PTLD patients for whom standard of care failed, underscoring the significant need for new therapeutic options.

(Press release, Pierre Fabre, DEC 8, 2025, View Source [SID1234661285])

On December 8, 2025 Agora Open Science Trust reported the nomination of M4K2009 as the lead development candidate for its M4K Pharma program, which applies open science to drive the development of an affordable treatment for Diffuse Intrinsic Pontine Glioma (DIPG), a rare and devastating pediatric brain cancer. Nominating a lead development candidate marks the point where a discovery program selects a single molecule with the highest potential to advance further towards human clinical trials. The selection of M4K2009 represents a significant scientific and organizational milestone.

Schedule your 30 min Free 1stOncology Demo!
Discover why more than 1,500 members use 1stOncology™ to excel in:

Early/Late Stage Pipeline Development - Target Scouting - Clinical Biomarkers - Indication Selection & Expansion - BD&L Contacts - Conference Reports - Combinatorial Drug Settings - Companion Diagnostics - Drug Repositioning - First-in-class Analysis - Competitive Analysis - Deals & Licensing

                  Schedule Your 30 min Free Demo!

The nomination follows an extensive, multi-year research collaboration with several academic and industry partners worldwide. Among the hundreds of compounds designed and evaluated, M4K2009 demonstrated excellent potency, selectivity, brain penetration, and tolerability in preclinical models, establishing it as a strong candidate for further development.

"Our nomination of M4K2009 represents an important milestone for open science drug discovery," said Max Morgan, CEO of Agora Open Science Trust. "By pooling resources, foregoing patents and secrecy, and instead working openly and collaboratively across institutions with complementary capabilities and expertise, our team has now shown that open science is capable of delivering high-quality, clinically viable candidates, particularly in areas of market failure underserved by traditional proprietary approaches."

With financial and in-kind support from the Krembil Foundation, Conscience’s Developing Medicines through Open Science (DMOS) program, OICR’s Cancer Therapeutics Innovation Pipeline (CTIP), Charles River Laboratories, Structural Genomics Consortium, Institute of Cancer Research, University of Pennsylvania, Montreal Children’s Hospital/McGill University, CAMH, Children’s Cancer Institute, Sant Joan de Deu Hospital, Reaction Biology, GL Chemtec and The Brain Tumour Charity, M4K Pharma has made critical strides toward realizing an affordable, first-in-class therapy for children affected by DIPG.

Conscience’s DMOS program, which is supported by a grant from the Government of Canada’s Strategic Innovation Fund, enables collaborative preclinical drug discovery in areas where open sharing and collaboration are key to advancement towards accessible treatments, such as rare and neglected diseases. Participating projects which include at least one Canadian SME, use an open science approach as they foster collaboration for pre-clinical work, demonstrate early proof-of-concept research, and ultimately translate innovation into affordable medicine and better health outcomes globally. The inaugural round of the program launched in February 2025, with the Agora Open Science Trust as one of the recipients.

"M4K Pharma’s lead development candidate nomination represents a significant step in advancing the program toward the clinical stage and demonstrates that an open science approach can bring us closer to meaningful treatments for rare diseases like DIPG," says Anne Fortier, VP drug discovery and development at Conscience. "Through the DMOS program, we’re proud to support rigorous, collaborative work that helps make therapies more accessible and affordable, particularly in areas where few solutions currently exist."

"Canada is proud to support open science collaborations that deliver real hope for children and families facing rare diseases like DIPG. The nomination of M4K2009 as a lead candidate reflects the power of Canadian innovation and partnership. By accelerating the development of affordable and accessible therapies, we are not only advancing research, but strengthening our position as a global leader in health innovation for the benefit of all Canadians," said The Honourable Mélanie Joly, Minister of Industry and Minister responsible for Canada Economic Development for Quebec Regions.

By sharing data and results with the research community and firmly committing to Agora’s charitable mission of achieving affordable access for affected children, the M4K Pharma program has been successful in motivating and aligning a broad range of contributors. The program has crowdsourced inputs from leading experts and reduced costs and duplication of effort across ALK2 drug discovery research for DIPG, and demonstrated that open science can achieve breakthroughs in areas that traditional, closed models often overlook.

(Press release, M4K Pharma, DEC 8, 2025, View Source [SID1234661302])

On December 8, 2025 Cullinan Therapeutics, Inc. (Nasdaq: CGEM), a clinical-stage biopharmaceutical company accelerating potential first- or best-in-class, high-impact therapies in autoimmune diseases and cancer, reported updated clinical data from its Phase 1 study of CLN-049, a novel, investigational FLT3xCD3 bispecific T cell engager, in patients with relapsed/refractory (R/R) acute myeloid leukemia (AML) and myelodysplastic syndrome (MDS). These data will be presented at the 67th American Society of Hematology (ASH) (Free ASH Whitepaper) Annual Meeting and Exposition, being held December 6-9, as an oral presentation on Monday, December 8, at 10:45 a.m. ET.

Schedule your 30 min Free 1stOncology Demo!
Discover why more than 1,500 members use 1stOncology™ to excel in:

Early/Late Stage Pipeline Development - Target Scouting - Clinical Biomarkers - Indication Selection & Expansion - BD&L Contacts - Conference Reports - Combinatorial Drug Settings - Companion Diagnostics - Drug Repositioning - First-in-class Analysis - Competitive Analysis - Deals & Licensing

                  Schedule Your 30 min Free Demo!

"These promising clinical data, including multiple complete responses and encouraging initial data for response durability, demonstrate the potential for CLN-049 to expand treatment options for a broad population of people with AML, including patients with TP53-mutated AML who currently face a particularly poor prognosis," said Jeffrey Jones, MD, MBA, Chief Medical Officer, Cullinan Therapeutics. "Coupled with recent Fast Track designation from the FDA, which underscores the promise of CLN-049 to help patients with AML, Cullinan is committed to rapidly advancing this potential new treatment option for a devastating disease."

"Despite advances in select settings, AML remains an aggressive blood cancer with limited options for durable response, particularly for patients with relapsed or refractory disease," said Mohammad Maher Abdul Hay, MD, Director, Clinical Leukemia Program, Perlmutter Cancer Center, and Director, Blood & Marrow Transplantation and Cellular Therapy Program, NYU Langone Health. "CLN-049 represents a novel approach to target AML as it binds to the extracellular domain of FLT3, both wildtype and mutated forms, redirecting a patient’s own T cells to recognize and eliminate leukemic cells. FLT3 is a particularly promising target for this therapeutic approach since it is expressed by AML blasts in more than 80% of patients. The compelling early efficacy including durability data shared today show the potential impact a FLT3-targeted T cell engager could have for AML patients in need of new options."

Efficacy Results

As of the August 2025 data cutoff, 45 patients (39 AML, 3 MDS/AML, and 3 MDS) were enrolled without regard to FLT3 cell surface expression across 8 cohorts (target dose range 1.5-12 µg/kg). 41 patients across 7 cohorts were efficacy evaluable, having reached at least one on-treatment response assessment. Patients with AML had received a median of 2 prior therapies (range: 1-8).

For AML, response was assessed using ELN 2022 criteria. Efficacy endpoints include complete response (CR) rate, composite complete response (CRc) rate (CR/complete remission with incomplete recovery (CRi)/complete remission with partial hematologic recovery (CRh)).

Promising monotherapy activity was observed in heavily pretreated patients with AML at clinically active target doses:

•
At the highest target dose studied thus far of 12 µg/kg (n=16), CR/CRh rate was 31% (5/16) and CRc rate was 31% (5/16).
•
Anti-leukemic activity was observed at target doses ≥6 µg/kg (n=32), with a CR/CRh rate of 25% (8/32) and a CRc rate of 28% (9/32).

Data show promising initial durability in responders, including measurable residual disease (MRD) negativity:

•
At efficacious doses (≥6 µg/kg), in the patients achieving a CR/CRh response, 63% (5/8) of patients had a duration of response of >16 weeks and 2 additional patients were able to proceed to allogeneic hematopoietic stem cell transplant.
•
In 10/32 patients achieving bone marrow blasts <5% at a target dose of ≥6 µg/kg, 30% (n=3) patients were MRD negative by flow cytometry, and 1 MRD-negative patient has had an ongoing response for >36 weeks.

Encouraging responses were observed in difficult-to-treat AML patients with high-risk genetic features:

•
Notably, among the 8 patients with TP53-mutated AML treated at 12 µg/kg, 50% (4/8) of patients achieved a CR/CRh response: 3 patients achieved a CRh response and 1 patient achieved a CR; 3/4 patients with CR/CRh had responses that were durable >16 weeks.
•
Responses were observed in patients with AML independent of baseline FLT3 expression and regardless of baseline genetic risk.

Safety Results

As of the August 2025 data cutoff, the data demonstrate a favorable safety profile in a broad population of patients with R/R AML and MDS (N=45):

•
The most common treatment-emergent adverse events (TEAEs) included cytokine release syndrome (CRS) (35.6%), infusion-related reaction (33.3%), febrile neutropenia (20.0%), white blood cell count decrease and pneumonia (17.8% each), diarrhea, hypomagnesemia, stomatitis, and hypokalemia (15.6% each).
•
Nearly all CRS events limited to Grade 1 or 2, and the majority occurred after a step-up dose (SUD) or target dose 1. No Grade 3 CRS was observed with two step-up doses. CRS did not lead to treatment discontinuation.
•
Grade ≥3 TEAEs occurring in >10% of patients included febrile neutropenia (20.0%), white blood cell count decrease (17.8%), pneumonia and neutrophil count decrease (11.1% each).

CLN-049 development will proceed under FDA Fast Track designation. Dose escalation continues in this ongoing Phase 1 study, with expansion cohorts planned in early 2026.

Live and Virtual Investor Event

Cullinan Therapeutics will host an in-person event for analysts and institutional investors on Monday, December 8, at 8:00 p.m. ET, during which David Sallman, MD, Associate Member, Myeloid Section Head, Moffitt Cancer Center & Research Institute, will participate in a discussion of the CLN-049 data shared at the 2025 ASH (Free ASH Whitepaper) Annual Meeting and Exposition with members of Cullinan Therapeutics management. Participants from Cullinan Therapeutics include Nadim Ahmed, Chief Executive Officer, and Jeffrey Jones, MD, MBA, Chief Medical Officer.

Investors and analysts are invited to register to attend in person by emailing Nick Smith, Head of Investor Relations ([email protected]). A webcast will be available via the events page of the Company’s investor relations website at View Source

About CLN-049

CLN-049 is a novel, investigational FLT3xCD3 bispecific T cell engager. CLN-049 is designed to target FLT3-expressing leukemia cells, offering a new immunotherapeutic approach for treating acute myeloid leukemia (AML) and myelodysplastic syndrome (MDS). CLN-049 binds to both mutated and non-mutated FLT3, allowing targeted action regardless of FLT3 mutational status, making the investigational treatment widely applicable to a broad population.

CLN-049 is being studied in a Phase 1, open-label, multicenter, first-in-human, multiple ascending dose study evaluating safety, tolerability, pharmacokinetics (PK), pharmacodynamics, and preliminary efficacy of intravenously (IV) administered CLN-049 in patients with relapsed/refractory AML or MDS (NCT05143996) and in a parallel Phase 1, open-label, dose escalation and dose expansion study for the treatment of patients with AML with measurable residual disease (MRD) (EUCT 2023-506572-27-00).

CLN-049 has received Fast Track designation from the U.S. FDA for the treatment of relapsed/refractory AML.

About Acute Myeloid Leukemia

Acute myeloid leukemia (AML) is a cancer of the blood and bone marrow and the most common form of acute leukemia in adults.1,2 It is characterized by the rapid growth of abnormal white blood cells that crowd out healthy cells, leading to infections, fatigue, and bleeding.3 Each year in the U.S., approximately 22,000 people are diagnosed with AML, and about half as many lives are lost to the disease.4 Globally, AML affects an estimated 144,000 people annually, with approximately 130,000 deaths.5

Despite recent advances, outcomes for patients with AML remain poor, particularly for those with relapsed or refractory disease, where five-year survival is 10% or less.4,6 Patients with high-risk genetic features, such as complex karyotype or TP53 mutations, face especially limited options.7,8 Intensive treatments like chemotherapy and stem cell transplantation may be inaccessible for many older patients due to severe side effects.8 Currently, there are no approved immunotherapies for AML, underscoring the urgent need for novel therapeutic approaches that can improve outcomes for patients and their families facing this life-threatening disease.

(Press release, Cullinan Oncology, DEC 8, 2025, View Source [SID1234661253])

On December 8, 2025 Pan Cancer T B.V., a biotech company pioneering next-generation T cell therapies for solid tumours, reported a EUR 10 million financing to advance its lead program, PCT1:CO-STIM, into a first-in-human clinical trial for women with triple-negative breast cancer (TNBC).

Schedule your 30 min Free 1stOncology Demo!
Discover why more than 1,500 members use 1stOncology™ to excel in:

Early/Late Stage Pipeline Development - Target Scouting - Clinical Biomarkers - Indication Selection & Expansion - BD&L Contacts - Conference Reports - Combinatorial Drug Settings - Companion Diagnostics - Drug Repositioning - First-in-class Analysis - Competitive Analysis - Deals & Licensing

                  Schedule Your 30 min Free Demo!

The financing includes EUR 5 million from existing investors Van Herk Ventures, Thuja Capital, Erasmus MC O&O Holdings, and InnovationQuarter, in addition to a EUR 5 million Innovation Credit loan from the Dutch Ministry of Economic Affairs. This funding will enable the company to treat TNBC patients at leading cancer centres in the Netherlands.

"Our mission is to empower a patient’s own immune cells to tackle hard-to-treat cancers like TNBC", said Rachel Abbott, Chief Executive Officer of Pan Cancer T. "This significant investment marks a pivotal moment as we transition from preclinical validation to treating patients with our first novel T-cell receptor (TCR) T cell therapy, PCT1:CO-STIM, following our planned regulatory filing with the EMA in 2026. We are deeply grateful to our investors and the Netherlands Enterprise Agency (RVO) for their confidence in our approach."

"Thuja Capital is dedicated to investing in the most innovative life sciences companies. Pan Cancer T’s TCR-T platform addresses hard-to-treat solid tumours, such as TNBC, that are the greatest challenge in oncology. Following our recent success in the cell and gene therapy field, with AstraZeneca’s acquisition of our portfolio company EsoBiotec, we are delighted to continue backing another pioneer in the C&GT space," said Michel Briejer, Managing Partner at Thuja Capital and member of Pan Cancer T’s Supervisory Board.

The upcoming trial will assess safety, tolerability, and preliminary efficacy of a therapeutic dose of PCT1:CO-STIM in TNBC patients. These patients have an urgent unmet medical need, with a 5-year survival rate following metastatic progression of approximately 12% and median overall survival of less than 6 months.

PCT1:CO-STIM is being developed as an autologous T cell therapy but also has the potential to be delivered in vivo at a later stage. It features a proprietary TCR highly specific for ROPN1, a novel tumour-restricted target expressed in over 90% of TNBC and melanoma cases. The therapy also incorporates a unique co-stimulatory technology designed to overcome immune resistance in solid tumours, aiming to deliver durable responses in patients with few treatment options.

(Press release, Pan Cancer T, DEC 8, 2025, https://pancancer-t.com/10-million-investment/ [SID1234661269])