• Year marked by transformational strategic license of the DNase oncology platform and shift in focus to treatment of locally advanced or metastatic solid tumors
• DNase program progressing towards Phase 1 clinical development
• Closed the year with $13.1 million of cash expected to fund operations and drive pipeline development

FRAMINGHAM, MA / ACCESSWIRE / March 23, 2023 / Xenetic Biosciences, Inc. (NASDAQ:XBIO) ("Xenetic" or the "Company"), a biopharmaceutical company focused on advancing innovative immune-oncology technologies addressing hard to treat cancers, today reported its financial results for the full year 2022 and provided a business update.

"2022 represented a transformational year for the Company. We expanded our oncology pipeline and bolstered our potential for key inflection points. We have continued to execute on our development plans for the DNase platform and are encouraged by our progress towards creating a near-term clinical development opportunity. We believe that our DNase platform, comprising multiple treatment modalities, has the potential to generate much needed therapies for pancreatic carcinoma and other locally advanced or metastatic solid tumors, and we are excited to unlock the full potential of our assets," commented Jeffrey Eisenberg, Chief Executive Officer of Xenetic.

DNase Oncology Platform: Targeting Neutrophil Extracellular Traps ("NETs") to improve cancer therapies with a focus on advancing systemic DNase program into the clinic as an adjunctive therapy for pancreatic carcinoma and other locally advanced or metastatic solid tumors.

Program Highlights:

• Systemic DNase program initially targeting multi-billion-dollar indications.
• Advancing toward planned first-in-human study to evaluate DNase combined with immune checkpoint inhibitors or chemotherapy.
• Notice of allowance received in January 2023 for Canadian patent covering use of DNase enzyme for preventing or ameliorating toxicity associated with chemotherapy.
• Appointed globally recognized oncology and NETs experts Allan Tsung, MD and Jonathan Spicer, MD, PhD to the Scientific Advisory Board for advancement of the DNase oncology platform.
• In August 2022, entered into a research and development collaboration agreement with VolitionRX Limited to develop NETs-targeted adoptive cell therapies potentially targeting multiple types of solid cancers.
• In June 2022, entered into a development and manufacturing agreement with Catalent Pharma Solutions LLC, which will include cGMP manufacturing of Phase 1 clinical supply.

PolyXen Platform Technology: Patent-protected platform technology designed for protein or peptide therapeutics, enabling next-generation biological drugs by prolonging a drug's circulating half-life and potentially improving other pharmacological properties.

Program Highlight:

• Royalty payments of approximately $1.7 million were received from our sublicense with Takeda in the year ended December 31, 2022, representing an approximate 47.1% increase over the year ended December 31, 2021.

Summary of Financial Results for Fiscal Year 2022

Net loss for the year ended December 31, 2022 was approximately $6.6 million. Research and development expenses for the year ended December 31, 2022 increased by $1.6 million, or 50.8% to $4.8 million from $3.2 million in the comparable period in 2021 primarily due to in-process research and development expense of $1.8 million. General and administrative expenses for the year ended December 31, 2022 was $3.7 million, a 2.4% decrease compared to the same period in the prior year. The decrease was primarily due to a decrease in consulting and legal costs associated with our intellectual property portfolio substantially offset by an increase in legal costs related to the licensing of the DNase oncology platform from CLS during the year ended December 31, 2022 compared to the same period in 2021.

The Company ended the year with approximately $13.1 million of cash.

About Xenetic Biosciences

Xenetic Biosciences, Inc. is a biopharmaceutical company focused on advancing innovative immune-oncology technologies addressing hard to treat cancers. The Company's DNase platform is designed to improve outcomes of existing treatments, including immunotherapies, by targeting neutrophil extracellular traps (NETs), which have been implicated in cancer progression and resistance to cancer treatments. Xenetic is currently focused on advancing its systemic DNase program into the clinic as an adjunctive therapy for pancreatic carcinoma and locally advanced or metastatic solid tumors.

The Company is also developing its personalized CAR T platform technology, XCART™, to develop cell-based therapeutics targeting the unique B-Cell receptor on the surface of an individual patient's malignant tumor cells for the treatment of B-Cell lymphomas.

For more information, please visit the Company's website at www.xeneticbio.com and connect on Twitter, LinkedIn, and Facebook.

Forward-Looking Statements

This press release contains forward-looking statements that we intend to be subject to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. All statements contained in this press release other than statements of historical facts may constitute forward-looking statements within the meaning of the federal securities laws. These statements can be identified by words such as "expects," "plans," "projects," "will," "may," "anticipates," "believes," "should," "intends," "estimates," and other words of similar meaning, including, but not limited to, statements regarding: expectations regarding a patent being issued by the Canadian Intellectual Property Office in the coming months for Patent Application No. 3,001,543; all statements regarding expectations for our DNase-base oncology platform, including continuing making encouraging progress towards creating a near-term clinical development opportunity and our excitement about the potential of the Company's assets, our expectations that the systemic DNase program is initially targeting multi-billion-dollar indications, our expectations regarding advancing toward our first-in-human study to evaluate DNase combined with immune checkpoint inhibitors or chemotherapy, our expectations appointing oncology and NETs experts to the Scientific Advisory Board for advancement of the DNase oncology platform, our focus on strengthening the intellectual property portfolio around DNase, the DNase platform improving outcomes of existing treatments, including immunotherapies, by targeting neutrophil extracellular traps (NETs), which have been implicated in cancer progression and resistance to cancer treatments, and our focus on advancing our systemic DNase program into the clinic as an adjunctive therapy for pancreatic carcinoma and locally advanced or metastatic solid tumors; and expectations regarding developing our personalized CAR T platform technology, XCART™, to develop cell-based therapeutics targeting the unique B-Cell receptor on the surface of an individual patient's malignant tumor cells for the treatment of B-Cell lymphomas. Any forward-looking statements contained herein are based on current expectations, and are subject to a number of risks and uncertainties. Many factors could cause our actual activities, performance, achievements, or results to differ materially from the activities and results anticipated in forward-looking statements. Important factors that could cause actual activities, performance, achievements, or results to differ materially from such plans, estimates or expectations include, among others, (1) unexpected costs, charges or expenses resulting from our manufacturing and collaboration agreements; (2) unexpected costs, charges or expenses resulting from the licensing of the DNase platform; (3) uncertainty of the expected financial performance of the Company following the licensing of the DNase platform; (4) failure to realize the anticipated potential of the DNase, XCART or PolyXen technologies; (5) the ability of the Company to implement its business strategy; and (6) other risk factors as detailed from time to time in the Company's reports filed with the SEC, including its annual report on Form 10-K, periodic quarterly reports on Form 10-Q, current reports on Form 8-K and other documents filed with the SEC. The foregoing list of important factors is not exclusive. In addition, forward-looking statements may also be adversely affected by general market factors, general economic and business conditions, including potential adverse effects of public health issues, such as the COVID-19 outbreak, and geopolitical events, such as the Russian invasion of Ukraine, on economic activity, competitive product development, product availability, federal and state regulations and legislation, the regulatory process for new product candidates and indications, manufacturing issues that may arise, patent positions and litigation, among other factors. The forward-looking statements contained in this press release speak only as of the date the statements were made, and the Company does not undertake any obligation to update forward-looking statements, except as required by law.

Contact:

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