HER2 x CD16a

ROCKVILLE, MD & DEERFIELD, IL, USA I October 22, 2024 I MacroGenics, Inc. (NASDAQ: MGNX), a biopharmaceutical company focused on discovering, developing, manufacturing and commercializing innovative antibody-based therapeutics for the treatment of cancer, and TerSera Therapeutics LLC, a privately-held biopharmaceutical company with a focus in oncology and non-opioid pain management, announced today that they have entered into an agreement in which TerSera will acquire global rights to MARGENZA® (margetuximab-cmkb). MARGENZA was approved by the U.S. Food and Drug Administration (FDA) in December 2020 in combination with chemotherapy for the treatment of adult patients with metastatic HER2-positive breast cancer who have received two or more prior anti-HER2 regimens, at least one of which was for metastatic disease. The approval was based on results from the pivotal Phase 3 head-to-head clinical trial (SOPHIA) evaluating the safety and efficacy of MARGENZA vs. Herceptin® (trastuzumab), both combined with chemotherapy. Pursuant to the terms of the agreement, TerSera will pay MacroGenics $40 million at closing. MacroGenics may receive additional sales milestone payments of up to an aggregate of $35 million. The transaction is expected to close in the fourth quarter of 2024, subject to customary closing conditions. “This transaction will enable us to focus our efforts on advancing our pipeline of novel and differentiated oncology product candidates,” said Scott Koenig, M.D., Ph.D., President and Chief Executive Officer of MacroGenics. “We believe TerSera’s established and complementary U.S. commercial infrastructure has the potential to broaden patient access to MARGENZA.” “MARGENZA is an important treatment option for patients with metastatic HER2+ breast cancer,” said Edward Donovan, Chief Executive Officer of TerSera. “We are very excited to add MARGENZA to our existing oncology portfolio, deepening our commitment to the treatment of patients with breast cancer.” IMPORTANT SAFETY INFORMATION BOXED WARNING: LEFT VENTRICULAR DYSFUNCTION AND EMBRYO-FETAL TOXICITY WARNINGS & PRECAUTIONS: Left Ventricular Dysfunction Embryo-Fetal Toxicity Infusion-Related Reactions (IRRs) MOST COMMON ADVERSE REACTIONS: The most common adverse drug reactions (>10%) with MARGENZA in combination with chemotherapy are fatigue/asthenia (57%), nausea (33%), diarrhea (25%), vomiting (21%), constipation (19%), headache (19%), pyrexia (19%), alopecia (18%), abdominal pain (17%), peripheral neuropathy (16%), arthralgia/myalgia (14%), cough (14%), decreased appetite (14%), dyspnea (13%), infusion-related reactions (13%), palmar-plantar erythrodysesthesia (13%), and extremity pain (11%). You may report side effects to the FDA at (800) FDA-1088 or www.fda.gov/medwatch or to MacroGenics at (844)-MED-MGNX (844-633-6469). INDICATION MARGENZA is a HER2/neu receptor antagonist indicated, in combination with chemotherapy, for the treatment of adult patients with metastatic HER2-positive breast cancer who have received two or more prior anti-HER2 regimens, at least one of which was for metastatic disease. Please see full Prescribing Information , including Boxed Warning. About HER2-positive Breast Cancer Human epidermal growth factor receptor 2 (HER2) is a protein found on the surface of some cancer cells that promotes growth and is associated with aggressive disease and poor prognosis. Approximately 15-20% of breast cancer cases are HER2-positive. Monoclonal antibodies targeting HER2 have greatly improved outcomes; however, a significant number of patients progress to later lines of therapy. Effective treatments for metastatic HER2-positive breast cancer continue to remain an unmet need. About MARGENZA MARGENZA (margetuximab-cmkb) is an Fc-engineered, monoclonal antibody that targets the HER2 oncoprotein. HER2 is expressed by tumor cells in breast, gastroesophageal and other solid tumors. Similar to trastuzumab, margetuximab-cmkb inhibits tumor cell proliferation, reduces shedding of the HER2 extracellular domain and mediates antibody-dependent cellular cytotoxicity (ADCC). However, through MacroGenics’ Fc Optimization technology, margetuximab-cmkb has been engineered to enhance the engagement of the immune system. In vitro, the modified Fc region of margetuximab-cmkb increases binding to the activating Fc receptor FCGR3A (CD16A) and decreases binding to inhibitor Fc receptor FCGR2B (CD32B). These changes lead to greater in vitro ADCC and NK cell activation. The clinical significance of in vitro data is unknown. About MacroGenics, Inc. MacroGenics is a biopharmaceutical company focused on discovering, developing, manufacturing and commercializing innovative monoclonal antibody-based therapeutics for the treatment of cancer. The Company generates its pipeline of product candidates primarily from its proprietary suite of next-generation antibody-based technology platforms, which have applicability across broad therapeutic domains. The combination of MacroGenics’ technology platforms and protein engineering expertise has allowed the Company to generate promising product candidates and enter into several strategic collaborations with global pharmaceutical and biotechnology companies. For more information, please see the Company’s website at www.macrogenics.com . About TerSera Therapeutics TerSera Therapeutics is a biopharmaceutical company with a focus in oncology and non-opioid pain management. Founded in 2016, TerSera is building new cornerstones of care through its portfolio of unique therapeutics, amplifying their ability to deliver meaningful outcomes for patients. TerSera has been recognized as a 2024 Healthcare Top Workplace. For additional information, please visit tersera .com and follow us on LinkedIn . SOURCE: MacroGenics

NEWARK, Del. and NANJING, China, March 21, 2024 /PRNewswire/ -- Biosion, a global, clinical-stage biotechnology company, today announced upcoming presentations of pre-clinical data for its oncology pipeline assets, including BSI-111, an anti-CD16a monoclonal antibody, BSI-730, a HER2/PD-L1 bispecific antibody and BSI-093, an anti-BTN3A monoclonal antibody at the American Association for Cancer Research (AACR) Annual Meeting to be held from April 5 to 10, 2024. "We are thrilled to present three posters at the AACR annual meeting. BSI-093, BSI-111 and BSI-730 demonstrate favorable biophysical and functional characteristics, supporting the initiation of development activities including manufacturing and IND-enabling studies" said Mingjiu Chen, Ph.D., Founder and Chief Executive Officer of Biosion, Inc. "We look forward to sharing the key data of these important therapeutic assets with the oncology research community at AACR." 01. BSI-111, a highly selective anti-CD16a monoclonal antibody with potent agonist activity for building a NK cell engager platform BSI-111 is a fully human monoclonal antibody discovered through Biosion's proprietary H³ Antibody Discovery Platform. BSI-111 binds specifically to CD16a without recognizing CD16b and binds the two allelic variants of CD16A - 158F and 158V with similar high affinity. BSI-111 demonstrates superior biophysical properties and functional characteristics, supporting the development of anti-CD16a-based NK cell engagers for the potential benefit of cancer patients. Time：April 8, 2024, 9:00 AM - 12:30 PM Location: Poster Section 2 Poster Board Number: 26 Published Abstract Number: 1343 02. BSI-730, a bispecific antibody targeting HER2 and PD-L1 for the development of a first-in-class bispecific ADC BSI-730 is a novel bispecific antibody for the development of a first-in-class bispecific ADC，identified through Biosion's proprietary SynTracer® High Throughput Endocytosis Platform. BSI-730 showed comparable binding affinity to HER2 as compared to trastuzumab, as well as comparable bioactivity to the parental anti-PD-L1 antibody regarding PD-L1 binding and PD-1/PD-L1 blocking. Time：April 8, 2024, 1:30 PM - 5:00 PM Location: Poster Section 21 Poster Board Number: 16 Published Abstract Number: 3135 03. BSI-093, a best-in-class anti-BTN3A monoclonal antibody for the treatment of cancer through the activation of Vγ9Vδ2 T cells BSI-093 is a highly differentiated, humanized anti-BTN3A agonistic monoclonal antibody with strong Vγ9Vδ2 T cell activation activity. The BTN3A family including BTN3A1, BTN3A2 and BTN3A3 are members of the Ig superfamily receptors, and is essential for the activation of Vγ9Vδ2 T cell-mediated anti-tumor immune responses. BTN3A's expression is significantly higher in tumor samples of cholangiocarcinoma, esophageal carcinoma, head and neck squamous cell carcinoma, compared to their counterpart normal tissue controls. Time：April 9, 2024, 1:30 PM - 5:00 PM Location: Poster Section 3 Poster Board Number: 7 Published Abstract Number: 5298 Additionally, Biosion's partner, CTTQ Pharma, OBI Pharma and Pyxis Oncology, will also be presenting posters at the AACR meeting. Partner：CTTQ A first-in-human phase 1 study of TQB2916, a novel CD40 agonist antibody for advanced malignancies TQB2916（BSI-038） is an anti-CD40 humanized agonist monoclonal antibody with 7-fold higher binding affinity and 4-fold higher cellular bioactivity compared to selicrelumab. By binding to CD40 receptor, it triggers the cellular proliferation and activation of antigen-presenting cells. In 2019, Biosion licensed Greater China rights of BSI-038 to CTTQ and retains all rights for development and commercialization in the rest of the world. Time：April 9, 2024, 9:00 AM - 12:30 PM Location: Poster Section 48 Poster Board Number: 20 Published Abstract Number: CT192 Partner：OBI Pharma 1. OBI-992, a novel TROP2 targeting antibody-drug conjugate, displayed excellent antitumor efficacy in various animal models Time：April 8, 2024, 9:00 AM - 12:30 PM Location: Poster Section 23 Poster Board Number:4 Published Abstract Number:1893 2. In vitro characterization of a novel TROP2-targeting antibody-drug conjugate OBI-992 Time：April 8, 2024, 1:30 PM - 5:00 PM Location: Poster Section 21 Poster Board Number: 11 Published Abstract Number:3130 3. OBI-992, a novel TROP2 targeting antibody drug conjugate demonstrates superior in vivo PK/PD properties and a favorable safety pro > Time：April 10, 2024, 9:00 AM - 12:30 PM Location: Poster Section 24 Poster Board Number: 20 Published Abstract Number: 7179 OBI-992 is a TROP2-targeted antibody-drug conjugate (ADC) that carries a potent topoisomerase I inhibitor payload to kill tumor cells. TROP2 is highly expressed in a variety of solid tumors such as lung, breast, ovarian, and gastric cancer, rendering it an ideal target for cancer therapy.OBI-992 uses a unique hydrophilic, enzyme-cleavable linker that is stable in circulation but releases the cytotoxic payload inside tumor cells. OBI-992 demonstrates remarkable antitumor efficacy, improved pharmacokinetic characteristics, and a favorable safety pro animal models. OBI-992 received US IND clearance in December 2023 and Phase 1/2 efficacy and safety human studies are planned to commence early Q2,2024. The TROP2 targeting antibody was in-licensed from Biosion, Inc. , in December 2021. OBI Pharma owns ex-China commercial rights for OBI-992. Partner：Pyxis Oncology Gene expression correlation of immune checkpoint molecules Siglec-15 and PD-L1 varies widely by cancer indication TIME：April 8, 2024, 9:00 AM - 12:30 PM Location: Poster Section 3 Poster Board Number: 24 Published Abstract Number: 1373 PYX-106 (BSI-060T) is a humanized anti-Siglec-15 monoclonal antibody being developed for solid tumors, including for patients that are not candidates for anti-PD-(L)1 treatment approaches. In this research, analysis of Siglec-15 mRNA expression was performed across single cells, cell lines, and bulk tumor samples to evaluate Siglec-15 target expression across a range of cancer types, including non-small cell lung cancer (NSCLC), cholangiocarcinoma, breast, thyroid, head and neck, colon, rectal, bladder, kidney, and endometrial cancers. These results demonstrate that Siglec-15 and PD-L1 are rarely found co-expressed on the same cell, provide detailed data on Siglec-15 and PD-L1 expression patterns by cancer type, and are expected to help inform potential future PYX-106 (BSI-060T) therapeutic strategies. In Mar 2022, Biosion licensed ex-Greater China rights of BSI-060T to Pyxis Oncology and retains all rights for development and commercialization in Greater China. Pyxis Oncology is conducting a Phase 1 clinical study of PYX-106 (BSI-060T) in solid tumors in the US and Europe. About Biosion Biosion is a global, clinical-stage biotechnology company committed to developing breakthrough antibody-based therapies to improve patient outcomes for the treatment of immune and oncologic diseases. Established in 2017, Biosion has built a pipeline of innovative biologics through its internally derived proprietary technologies including the H³ antibody discovery platform, SynTracer® HT endocytosis platform, and Flexibody® bispecific platform. Biosion's lead asset, Bosakitug (BSI-045B/TQC2731), an anti-TSLP mAb, is currently in phase II for severe asthma, atopic dermatitis, and chronic rhinosinusitis with nasal polyps (CRSwNP), with another 6 partnered assets in phase I/II. Biosion has operations in the US, China and Australia. For more information, please visit . Contact: Mason Xu mason.xu@biosion.com

Trodelvy and HER-2 TriNKET combinations will be in metastatic breast cancer (mBC) and non-small cell lung cancer (NSCLC). WALTHAM, Mass., Feb. 15, 2024 /PRNewswire/ -- Dragonfly Therapeutics, Inc., a clinical stage biotechnology company developing novel immunotherapies today announced a new clinical collaboration designed to evaluate and combine DF1001, a HER-2 immune engager developed using Dragonfly's TriNKET technology platform and Dragonfly's lead clinical asset, with Trodelvy, Gilead's Trop-2-directed antibody drug conjugate (ADC), in metastatic breast cancer (mBC) and non-small cell lung cancer (NSCLC). "DF1001 is the first of eight Dragonfly-developed drugs in the clinic and has shown clinical benefit in mBC, NSCLC and colorectal cancer (CRC) in a heterogeneous Phase 1 population with 22% RECIST responders and 39% clinical benefit in mBC patients at active dose levels, with no DLTs, even in a heavily-pre-treated population," said Joseph Eid, Dragonfly President of R&D. "It has been demonstrated to be well tolerated across all dose levels in the Phase 1 study as monotherapy, and pharmacodynamic activity was demonstrated in 28/42 (67%) paired biopsies from 0.5-15mg/kg, where increase in CD8 and NK cell infiltration was observed consistent with preclinical models and supporting the TriNKET immune modulating MoA. Our preclinical work has shown the powerful combinatorial effect of TriNKETs with ADCs, and highlighted the potential benefits to patients of using Gilead's Trodelvy in combination with DF1001." "We are delighted to further strengthen our partnership with Gilead by launching this new clinical stage collaboration," said Bill Haney, CEO and Dragonfly co-founder. "Dragonfly has promising pre-clinical data that highlights the potential for synergistic efficacy when DF1001 is combined with Trodelvy in mBC and NSCLC. We are excited to work with our colleagues at Gilead to bring this combination to patients in need." Dragonfly will have operational control of the study and first patients are expected to receive this combination in Q2 2024. Clinical trial sites are currently open in the U.S., France, Belgium, Denmark and the Netherlands. Additional sites in North America, Europe and Asia Pacific will open in 2024. Additional information about the trial, including eligibility criteria, can be found at: (ClinicalTrials.gov Identifier: NCT04143711). About DF1001 DF1001 is an investigational first-in-class drug candidate that targets natural killer (NK) cells and T-cell activation signals to co-activating NK receptors, where NKG2D and CD16 co-stimulation yields distinctive and potent NK cell activation. DF1001 is being evaluated in adult patients for the treatment of advanced solid HER-2 positive tumors. DF1001 was discovered and developed using Dragonfly's TriNKET platform. DF1001 has the potential to stimulate effective anti-tumor immunity in patients who are not eligible or not adequately responding to current therapies. DF1001 is the most advanced in a pipeline of TriNKETs that Dragonfly is developing to address high unmet needs for patients across a broad range of disease areas. About Dragonfly Dragonfly Therapeutics is a clinical-stage biopharmaceutical company committed to discovering, developing and commercializing novel therapies that harness the body's immune system to bring breakthrough treatments to patients. In addition to a set of advanced programs in the clinic, Dragonfly has a deep pipeline of wholly owned preclinical candidates discovered using its proprietary platforms that are progressing toward the clinic, as well as productive collaborations with AbbVie, Bristol Myers Squibb, Gilead and Merck in a broad range of disease areas. For more information visit: DRAGONFLY MEDIA CONTACT: Anne E. Deconinck | [email protected] Logo -