XBIO

Company evaluating systemic recombinant human DNase I in combination with anti-CD19 CAR T cells targeting lymphoma patients in stable or progressive disease at lymphodepletion  Company reported strong positive preclinical results demonstrating significantly enhanced anti-tumor activity of anti-CD-19 CAR T cells when combined with DNase I in multiple preclinical models of hematologic cancers Investigator initiated study to be conducted at Tel-Aviv Sourasky Medical Center ("Sourasky Center") FRAMINGHAM, MA / ACCESS Newswire / June 4, 2026 / Xenetic Biosciences, Inc. (NASDAQ:XBIO) ("Xenetic" or the "Company"), a biopharmaceutical company focused on advancing innovative immuno-oncology technologies addressing difficult to treat cancers, today announced that its collaboration partner, PeriNess Ltd. (PeriNess), has informed the Company that it received formal approval from the Israeli Ministry of Health and the respective Institutional Review Board to conduct an exploratory clinical study of a combination systemic DNase I with anti-CD19 CAR T Cells in large B cell lymphoma (LBCL) patients.

New preclinical and translational findings position DNase I as a potentially transformative adjunct therapy for CAR-T treatment in aggressive B cell malignancies Data highlight potential of DNase I to improve CAR-T cell expansion, reduce exhaustion and enhance tumor control across hematologic cancer models Findings support continued clinical development of DNase I as a combinatorial strategy to augment CAR-T cell therapies in difficult-to-treat cancers Data to be presented today as a poster presentation at the ASCO 2026 annual meeting FRAMINGHAM, MA / ACCESS Newswire / June 1, 2026 / Xenetic Biosciences, Inc. (NASDAQ:XBIO) ("Xenetic" or the "Company"), a biopharmaceutical company focused on advancing innovative immuno-oncology technologies addressing difficult to treat cancers, today announced positive preclinical data will be presented at the 2026 American Society of Clinical Oncology (ASCO) Annual Meeting demonstrating that DNase I significantly enhances CAR-T cell expansion, persistence, and antitumor efficacy in aggressive hematologic cancer models. Presentation Details: Session Title: Hematologic Malignancies - Plasma Cell Dyscrasia (Poster Session) Abstract Title: Targeting cfDNA and NETs with DNase I to augment CAR-T cell function and antitumor efficacy Poster Board: 410 Presentation Date & Time: June 1, 2026, 9:00 AM - 12:00 PM CDT Presenter: Alexey V.

Advancements across investigator-initiated studies, translational research and manufacturing activities supporting future clinical development Strengthened financial profile with continued royalty revenue growth Ended first quarter 2026 with approximately $7.3 million in cash while continuing evaluation of strategic alternatives to maximize shareholder value FRAMINGHAM, MA / ACCESS Newswire / May 13, 2026 / Xenetic Biosciences, Inc. (NASDAQ:XBIO) ("Xenetic" or the "Company"), a biopharmaceutical company focused on advancing innovative immuno-oncology technologies addressing difficult to treat cancers, today reported its financial results for the quarter ended March 31, 2026 and provided a corporate update on the advancement of its innovative DNase oncology platform. Recent Highlights Generated robust translational data supporting the DNase I platform across multiple oncology settings Completed process improvement and analytical development activities supporting future clinical manufacturing readiness Established translational and biomarker insights intended to help inform and de-risk future clinical trial design Collaboration partner received approval from Israeli Ministry of Health to conduct investigator-initiated exploratory study of DNase I in combination with anti-CD19 CAR T cells in large B-cell lymphoma "We entered 2026 with a clear focus on advancing the translational, manufacturing and clinical foundation of our DNase I platform while maintaining financial discipline," said James Parslow, Interim Chief Executive Officer and Chief Financial Officer of Xenetic.

FRAMINGHAM, MA / ACCESS Newswire / April 22, 2026 / Xenetic Biosciences, Inc. (NASDAQ:XBIO) ("Xenetic" or the "Company"), a biopharmaceutical company focused on advancing innovative immuno-oncology technologies addressing difficult to treat cancers, today announced that its abstract has been accepted for presentation at the 2026 American Society of Clinical Oncology (ASCO) Annual Meeting, taking place May 29 - June 2, 2026, in Chicago, IL. The accepted abstract, titled "Targeting cfDNA and NETs with DNase I to augment CAR T cell function and antitumor efficacy," highlights preclinical research supporting Xenetic's DNase-based therapeutic approach designed to enhance CAR T-cell activity and improve antitumor responses.