CD3ζ

New preclinical data demonstrating proof-of-concept for the non-signaling gamma-delta T cell CAR (nsCAR) platform candidate targeting CD-33 and CD-123 will be presented.The platform has demonstrated the ability to target cancer cells while sparing healthy tissue when both express the CAR-targeted antigens, which could be used for previously “undruggable” solid and liquid tumor targets. NEW YORK, March 05, 2024 (GLOBE NEWSWIRE) -- IN8bio, Inc. (Nasdaq: INAB) a clinical-stage biopharmaceutical company developing innovative gamma-delta T cell therapies, today announced the presentation of new preclinical data for its non-signaling gamma-delta T cell based Chimeric Antigen Receptor T cell (CAR-T) platform, INB-300. The data will be presented at the 2024 American Association for Cancer Research (AACR) Annual Meeting, being held April 5-10, 2024 in San Diego, California. The current generation of CAR-T technology eliminates the target antigen regardless of whether it is expressed on tumor or healthy tissue. IN8bio's nsCAR platform, INB-300, uses the CAR to traffic and bind to cells expressing the target and leverages the natural innate immune recognition abilities of gamma-delta T cells to distinguish between tumor and healthy tissue. This allows the cells to selectively eliminate cancer cells while leaving healthy cells intact, even when both express the CAR-target. “We're excited to share this new data from our nsCAR platform, INB-300, which enables next-generation precision CAR-T therapy by selectively targeting leukemia cells while preserving healthy tissues,” said Lawrence Lamb, Ph.D., co-founder and Chief Scientific Officer, IN8bio. “We are using gamma-delta T cells to treat a wide variety of cancers, including myeloid malignancies and solid tumors, where current CAR-T therapy has historically faced significant challenges due to on target, but off tumor toxicities. We look forward to advancing our pipeline of novel gamma-delta based nsCAR therapies for patients with significant unmet need.” AACR Poster Presentation Details Poster Title: Gamma-delta (γδ) CAR-T cells lacking the CD3ζ signaling domain enhance targeted killing of AML cells and preserve healthy tissues Abstract Presentation Number: 5227 Session Title: Adoptive Cell Therapies 4 Session Date and Time: Tuesday, April 9, 2024, 1:30pm-5:00pm PT (4:30pm-8:00pm ET) About INB-300INB-300 is a non-signaling CAR (nsCAR) gamma-delta T cell platform with several preclinical product candidates, including the INB-330 program against AML targets, that combine our expertise in gamma-delta T cells and genetic engineering. These nsCAR constructs lack signaling domains in order to take advantage of the unique properties of gamma-delta T cells to differentiate between healthy and tumor tissues. IN8bio is advancing new nsCAR constructs against multiple targets to treat both solid and liquid tumors. About IN8bioIN8bio is a clinical-stage biopharmaceutical company developing gamma-delta T cell-based immunotherapies for cancer patients. Gamma-delta T cells are a specialized population of T cells that possess unique properties, including the ability to differentiate between healthy and diseased tissue. The company’s lead program, INB-400, is in a Phase 2 trial in glioblastoma multiforme (GBM). Additional programs include Phase 1 trials in solid and hematologic tumors, including INB-200 for GBM and INB-100 for patients with hematologic malignancies undergoing transplantation. For more information about IN8bio, visit www.IN8bio.com. Forward-Looking StatementsThis press release may contain forward-looking statements made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. These statements may be identified by words such as “aims,” “anticipates,” “believes,” “could,” “estimates,” “expects,” “forecasts,” “goal,” “intends,” “may,” “plans,” “possible,” “potential,” “seeks,” “will” and variations of these words or similar expressions that are intended to identify forward-looking statements, although not all forward-looking statements contain these words. Forward-looking statements in this press release include, but are not limited to, statements regarding the ability of IN8bio’s nsCAR platform to use the innate immune recognition of gamma-delta T cells to selectively targeting leukemia cells while preserving healthy tissues; IN8bio’s ability to use gamma delta T cells to treat a wide variety of cancers, including myeloid malignancies and solid tumors; and IN8bio’s ability to advance its pipeline of novel gamma-delta CAR-T therapies. IN8bio may not actually achieve the plans, intentions, or expectations disclosed in these forward-looking statements, and you should not place undue reliance on these forward-looking statements. Actual results or events could differ materially from the plans, intentions, and expectations disclosed in these forward-looking statements as a result of various factors, including: risks to site initiation, clinical trial commencement, patient enrollment, and follow-up, as well as IN8bio’s ability to meet anticipated deadlines and milestones, presented by public health crises as well as rising inflation and regulatory developments; uncertainties inherent in the initiation and completion of preclinical studies and clinical trials and clinical development of IN8bio’s product candidates; the risk that IN8bio may not realize the intended benefits of its DeltEx platform; availability and timing of results from preclinical studies and clinical trials; whether the outcomes of preclinical studies will be predictive of clinical trial results; whether initial or interim results from a clinical trial will be predictive of the final results of the trial or the results of future trials; the risk that trials and studies may be delayed and may not have satisfactory outcomes; potential adverse effects arising from the testing or use of IN8bio’s product candidates; expectations for regulatory approvals to conduct trials or to market products; IN8bio’s reliance on third parties, including licensors and clinical research organizations; and other important factors, any of which could cause our actual results to differ from those contained in the forward-looking statements are described in greater detail in the section entitled “Risk Factors” in our Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission (SEC) on November 9, 2023, as well as in other filings IN8bio may make with the SEC in the future. Any forward-looking statements contained in this press release speak only as of the date hereof, and IN8bio expressly disclaims any obligation to update any forward-looking statements contained herein, whether because of any new information, future events, changed circumstances, or otherwise, except as otherwise required by law. Company Contact:IN8bio, Inc.Patrick McCall646.600.6438info@IN8bio.com InvestorsMeru AdvisorsLee M. Sternlstern@meruadvisors.com Media ContactKimberly HaKKH Advisors917.291.5744kimberly.ha@kkhadvisors.com

SHANGHAI, March 1, 2024 /PRNewswire/ -- CARsgen Therapeutics Holdings Limited (Stock Code: 2171.HK), a company focused on innovative CAR T-cell therapies for the treatment of hematologic malignancies and solid tumors, announces that today the National Medical Products Administration ("NMPA") of China has approved the New Drug Application ("NDA") for zevorcabtagene autoleucel (R&D code: CT053, an autologous CAR-T product candidate against BCMA), for the treatment of adult patients with relapsed or refractory multiple myeloma who have previously progressed after at least 3 lines of therapy (including a proteasome inhibitor and immunomodulator agent). Zevorcabtagene autoleucel is an autologous BCMA-targeted CAR T-cell product, generated by transducing T cells with a lentivirus encoding a CAR comprising a fully human BCMA-specific single chain variable fragment ("scFv"), the human CD8α hinge domain, CD8α transmembrane domain, 4-1 BB co-stimulatory domain and CD3ζ activation domain. The proprietary novel fully-human scFv has high binding affinity and stability. The approval of zevorcabtagene autoleucel is based on an open-label, single arm, multi-center Phase II clinical trial (LUMMICAR STUDY 1, NCT03975907) conducted in China. The trial results were released at the 2022 Annual Meeting of the American Society of Hematology ("ASH"), and zevorcabtagene autoleucel demonstrated encouraging efficacy and a favorable safety profile. Multiple myeloma is an incurable malignant plasma cell disorder that accounts for approximately 10% of all hematological cancers.[1] With China's ageing population coupled with an increase in life expectancy, the number of patients with multiple myeloma is expected to expand. Frost & Sullivan forecasts that the prevalence of multiple myeloma in China in 2023 is approximately 153,000 per annum, and the number of new cases would be 23,200 per annum. It is estimated that the prevalence of multiple myeloma in China is expected to grow to 266,300 by 2030.[2] Prof. Wenming Chen, the principal investigator of the LUMMICAR STUDY 1, Director of Hematology Department, Beijing Chao-Yang Hospital, Capital Medical University, said, "In the realm of traditional treatments, the prognosis for patients dealing with relapsed or refractory multiple myeloma remains notably grim, given the limitations of available therapeutic alternatives. These individuals confront substantial unmet clinical needs, necessitating an expeditious adoption of an effective, safe, and convenient treatment modalities. The approval of zevorcabtagene autoleucel not only expands the array of choices available to clinical practitioners but also brings new hope to patients." Prof. Chengcheng Fu, the principal investigator of the LUMMICAR STUDY 1, Director of Hematology Department, the First Affiliated Hospital of Soochow University, said, "Based on the published results of the LUMMICAR-1 study, zevorcabtagene autoleucel has demonstrated profound and enduring therapeutic efficacy in patients with relapsed or refractory multiple myeloma, exhibiting overall favorable tolerability. We are pleased to witness the regulatory approval and market launch of zevorcabtagene autoleucel. We look forward to its potential to benefit a larger number of individuals, aiding them in achieving high-quality, long-term survival." Dr. Zonghai Li, Founder, Chairman of the Board, Chief Executive Officer, and Chief Scientific Officer of CARsgen Therapeutics, said, "This year marks the tenth anniversary of CARsgen, and I am delighted to announce the NDA approval of zevorcabtagene autoleucel. This achievement stands as a significant milestone in the company's development and serves as a testament to the unwavering dedication of our team. I would like to express heartfelt gratitude to our team members, investigators, patients, and the broader community for their support and trust. We look forward to zevorcabtagene autoleucel bringing renewed hope to adult patients with relapsed or refractory multiple myeloma, thereby improving their survival. Guided by the vision of 'Making Cancer Curable,' we remain committed to exploring new technologies, expanding our product pipeline with global rights to address the major challenges of CAR T-cell therapies, and bringing innovative and differentiated cell therapies to cancer patients worldwide." About Zevorcabtagene Autoleucel Zevorcabtagene autoleucel is a fully human, autologous BCMA CAR T-cell product for the treatment of R/R MM. As informed by the NMPA on March 1, 2024, zevorcabtagene autoleucel was approved on February 23, 2024, for the treatment of adult patients with relapsed or refractory multiple myeloma who have previously progressed after at least 3 lines of therapy (at least one proteasome inhibitor and immunomodulator). CARsgen is conducting a separate Phase 1b/2 LUMMICAR STUDY 2 clinical trial in North America to evaluate the safety and efficacy of zevorcabtagene autoleucel in R/R MM. Zevorcabtagene autoleucel received Regenerative Medicine Advanced Therapy (RMAT) and Orphan Drug designations from the U.S. FDA in 2019, as well as Priority Medicines (PRIME) and Orphan Medicinal Product designations from the European Medicines Agency (EMA) in 2019 and 2020, respectively. Zevorcabtagene autoleucel also received Breakthrough Therapy designation from the NMPA in 2020. In January 2023, CARsgen and Huadong Medicine announced a collaboration for the commercialization of zevorcabtagene autoleucel in mainland China. Huadong Medicine was granted the exclusive right to commercialize zevorcabtagene autoleucel in mainland China. About CARsgen Therapeutics Holdings Limited CARsgen is a biopharmaceutical company with operations in China and the U.S. and is focused on innovative CAR T-cell therapies for the treatment of hematologic malignancies and solid tumors. CARsgen has established a comprehensive CAR T-cell research and development platform, encompassing target discovery, innovative CAR T-cell development, clinical trials, and commercial-scale production. CARsgen has internally developed novel technologies and a product pipeline with global rights to address major challenges of CAR T-cell therapies, such as improving the safety profile, enhancing the efficacy in treating solid tumors, and reducing treatment costs. CARsgen's vision is to become a global biopharmaceutical leader that brings innovative and differentiated cell therapies to cancer patients worldwide and makes cancer curable. Forward-looking Statements All statements in this press release that are not historical fact or that do not relate to present facts or current conditions are forward-looking statements. Such forward-looking statements express the Group's current views, projections, beliefs and expectations with respect to future events as of the date of this press release. Such forward-looking statements are based on a number of assumptions and factors beyond the Group's control. As a result, they are subject to significant risks and uncertainties, and actual events or results may differ materially from these forward-looking statements and the forward-looking events discussed in this press release might not occur. Such risks and uncertainties include, but are not limited to, those detailed under the heading "Principal Risks and Uncertainties" in our most recent annual report and interim report and other announcements and reports made available on our corporate website, . No representation or warranty is given as to the achievement or reasonableness of, and no reliance should be placed on, any projections, targets, estimates or forecasts contained in this press release. Contact CARsgen For more information, please visit Public Relations: [email protected] Investor Relations: [email protected] SOURCE CARsgen Therapeutics

Second IND Clearance for ATA3219 Following Non-Hodgkin’s Lymphoma (NHL) and First in an Autoimmune Disease Indication Initial Clinical Data in NHL Anticipated in H2 2024 and for Lupus Nephritis in H1 2025 THOUSAND OAKS, Calif.--(BUSINESS WIRE)-- Atara Biotherapeutics, Inc. (Nasdaq: ATRA), a leader in T-cell immunotherapy, leveraging its novel allogeneic Epstein-Barr virus (EBV) T-cell platform to develop transformative therapies for patients with cancer and autoimmune diseases, today announced the U.S. Food and Drug Administration (FDA) has cleared an Investigational New Drug (IND) application for ATA3219, an allogeneic, anti-CD19 chimeric antigen receptor (CAR) T-cell monotherapy for the treatment of systemic lupus erythematosus (SLE) with kidney involvement (lupus nephritis [LN]). “Expanding upon an extensive clinical experience encompassing the treatment of over 600 patients using our allogeneic T-cell platform in both oncology and autoimmune diseases, we are excited to clinically evaluate the potential of our differentiated allogeneic CAR T-cell approach. We are eager to address the significant unmet need in lupus nephritis as we initiate our Phase 1 trial,” said Pascal Touchon, President and Chief Executive Officer of Atara. “We look forward to bringing the promise and accessibility of a potentially curative off-the-shelf cell therapy option to patients with severe autoimmune diseases, potentially eliminating the burdens of autologous CAR T therapies like costly infrastructure and treatment delays.” The multi-center, Phase 1, open-label, single-arm, dose-escalation study will evaluate the safety and preliminary efficacy of ATA3219 in subjects with LN. Subjects will receive lymphodepletion treatment followed by ATA3219 at a dose of 40, 80, or 160 x 106 CAR+ T cells. ATA3219 is designed to be given as a one-time infusion and followed for safety and efficacy. Each dose level is designed to enroll 3-6 patients, with the first subject expected to be enrolled in the second half of 2024. “Existing therapeutic agents for lupus nephritis yield suboptimal responses and have limitations due to their requirement for ongoing administration, susceptibility to treatment failures, and limited accessibility to inflamed tissues resulting in incomplete depletion of B cells,” said Rajani Dinavahi, Chief Medical Officer at Atara. “CAR T cells can naturally infiltrate deep into target tissues to mediate B-cell depletion and produce durable responses. Building on the encouraging academic data in lupus nephritis with autologous CD19 CAR T, ATA3219 is an off-the-shelf therapy that could significantly reduce constraints for patients and physicians like leukapheresis and long waiting times, therefore potentially improving access to a large population of patients.” Proof of concept for a CD19 CAR T approach in autoimmune disease was first demonstrated in early academic results from an investigator-sponsored study showing 100% (8/8) of LN patients rapidly attaining drug-free, durable remission with an autologous CD19-targeted CAR T therapy. The therapy eliminated the pathogenic, autoreactive B cells and allowed healthy B cells to return after treatment, enabling the patients’ immune system to function normally again with associated improvement of clinical symptoms.1 These early proof of concept clinical data with CD19 targeted CAR T support further development of CAR T for LN with differentiated and off-the-shelf allogeneic approaches. The ATA3219 IND submission included in vitro data reflecting the CD19 antigen-specific functional activity of ATA3219 and CAR-mediated activity against B cells from SLE patients. ATA3219 led to robust CD19-specific B-cell depletion compared to controls. LN is a serious and most common complication of SLE, a chronic multisystem autoimmune disease. The prevalence of SLE in the U.S. is 73 per 100,000 people, afflicting more than 200,000 U.S. patients alone, and occurs in women much more commonly than men. Up to 60% of adult patients with SLE develop renal disease during the course of their illness, and up to 70% of patients with LN are refractory to standard immunosuppressive therapies. Despite recent advances in treatment strategies, the response rate using existing therapies remains low, with significant risk of long-term morbidity and mortality associated with refractory LN. About ATA3219 ATA3219 combines the natural biology of unedited T cells with the benefits of an allogeneic therapy. It consists of allogeneic Epstein-Barr virus (EBV)-sensitized T cells that express a CD19 CAR construct for the treatment of CD19+ relapsed or refractory B-cell malignancies, including B-cell non-Hodgkin’s lymphoma and B-cell mediated autoimmune diseases including systemic lupus erythematosus (SLE) with kidney involvement (lupus nephritis [LN]). ATA3219 has been optimized to offer a potential best-in-class profile, featuring off-the-shelf availability. It incorporates multiple clinically validated technologies including a modified CD3ζ signaling domain (1XX) that optimizes expansion and mitigates exhaustion, enrichment during manufacturing for a less differentiated phenotype for robust expansion and persistence and retains the endogenous T-cell receptor without gene editing as a key survival signal for T cells contributing to persistence. Next-Generation Allogeneic CAR T Approach Atara is focused on applying Epstein-Barr virus (EBV) T-cell biology, featuring experience in over 600 patients treated with allogeneic EBV T cells, and novel chimeric antigen receptor (CAR) technologies to meet the current limitations of autologous and allogeneic CAR therapies head-on by advancing a potential best-in-class CAR T pipeline in oncology and autoimmune disease. Unlike gene-edited approaches aimed at inactivating T-cell receptor (TCR) function to reduce the risk for graft-vs-host disease, Atara’s allogeneic platform maintains expression of the native EBV TCR that promote in vivo functional persistence while also demonstrating inherently low alloreactivity due to their recognition of defined viral antigens and partial human leukocyte antigen (HLA) matching. A molecular toolkit of clinically-validated technologies—including the 1XX costimulatory domain designed for better cell fitness and less exhaustion while maintaining stemness—offers a differentiated approach to addressing significant unmet need with the next generation CAR T. About Atara Biotherapeutics, Inc. Atara is harnessing the natural power of the immune system to develop off-the-shelf cell therapies for difficult-to-treat cancers and autoimmune conditions that can be rapidly delivered to patients from inventory. With cutting-edge science and differentiated approach, Atara is the first company in the world to receive regulatory approval of an allogeneic T-cell immunotherapy. Our advanced and versatile T-cell platform does not require T-cell receptor or HLA gene editing and forms the basis of a diverse portfolio of investigational therapies that target EBV, the root cause of certain diseases, in addition to next-generation AlloCAR-Ts designed for best-in-class opportunities across a broad range of hematological malignancies and B-cell driven autoimmune diseases. Atara is headquartered in Southern California. For more information, visit atarabio.com and follow @Atarabio on X and LinkedIn. Forward-Looking Statements This press release contains or may imply "forward-looking statements" within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. For example, forward-looking statements include statements regarding the development, data, timing and progress, as applicable, of: (1) the ATA3219 program; (2) the potential characteristics and benefits of ATA3219; (3) the Company’s planned clinical study of ATA3219 to treat lupus nephritis, including the timing and enrollment thereof. Because such statements deal with future events and are based on Atara’s current expectations, they are subject to various risks and uncertainties and actual results, performance or achievements of Atara could differ materially from those described in or implied by the statements in this press release. These forward-looking statements are subject to risks and uncertainties, including, without limitation, risks and uncertainties associated with the costly and time-consuming pharmaceutical product development process and the uncertainty of clinical success; the ongoing COVID-19 pandemic and the wars in Ukraine and the Middle East, which may significantly impact (i) our business, research, clinical development plans and operations, including our operations in Southern California and Denver and at our clinical trial sites, as well as the business or operations of our third-party manufacturer, contract research organizations or other third parties with whom we conduct business, (ii) our ability to access capital, and (iii) the value of our common stock; the sufficiency of Atara’s cash resources and need for additional capital; and other risks and uncertainties affecting Atara’s and its development programs, including those discussed in Atara’s filings with the Securities and Exchange Commission , including in the “Risk Factors” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” sections of the Company’s most recently filed periodic reports on Form 10-K and Form 10-Q and subsequent filings and in the documents incorporated by reference therein. Except as otherwise required by law, Atara disclaims any intention or obligation to update or revise any forward-looking statements, which speak only as of the date hereof, whether as a result of new information, future events or circumstances or otherwise. 1Mueller, F., et al. CD19-Targeted CAR-T Cells in Refractory Systemic Autoimmune Diseases: A Monocentric Experience from the First Fifteen Patients. Blood 2023; 142 (Supplement 1): 220.