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Cytovia Therapeutics presents antitumor activity of its CD38-Targeting Flex-NK™ Cell Engager antibody at EHA 2022 Congress

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Data supports further development of CYT-338 in relapsed/refractory multiple myeloma

AVENTURA, Fla. and NATICK, Mass., June 10, 2022 /PRNewswire/ -- Cytovia Therapeutics, Inc., a biopharmaceutical company empowering natural killer (NK) cells to fight cancer through stem cell engineering and multispecific antibodies, announced today that the novel data it is presenting at the European Hematology Association's annual congress in Vienna, Austria on June 10th, 2022 is now available on both the EHA and Cytovia websites.

Cytovia Therapeutics (PRNewsfoto/Cytovia Therapeutics)
Cytovia Therapeutics (PRNewsfoto/Cytovia Therapeutics)

For details on in-person poster presentations, please see the following:

Title: NOVEL MULTIFUNCTIONAL TETRAVALENT CD38 NKP46 FLEX-NK ENGAGERS ACTIVELY TARGET AND KILL MULTIPLE MYELOMA CELLS
Session Title: Poster session
Session date and time: Friday, June 10 2022 - 16:30 - 17:45 CEST
Final Abstract Code:  P842
Abstract Link:  https://library.ehaweb.org/eha/2022/eha2022-congress/357704/antonio.arulanandam.novel.multifunctional.tetravalent.cd38.nkp46.flex-nk.html?f=listing%3D0%2Abrowseby%3D8%2Asortby%3D1%2Asearch%3DNK

Summary: CYT-338 is a tetravalent IgG1-like multifunctional NK cell engager antibody with a novel FLEX-linker that simultaneously binds CD38-expressing cells and NK cells via the activating receptor NKp46. CYT-338 pharmacokinetics and pharmacodynamics was studied using in vitro and in vivo multiple myeloma models. CYT-338 showed 3-fold higher dose-dependent binding to CD38 expressing MM cell lines compared to daratumumab. Epitope mapping studies indicated that CYT-338 binds to a different CD38 epitope compared to daratumumab. CYT-338 showed greater dose dependent NK cell redirected cytolysis, degranulation, and cytokine production against MM1S cells compared to daratumumab. CYT-338 showed minimal immune subset depletion, NK cell fratricide, and cytokine release compared to daratumumab in vitro. CYT-338 showed tumor growth inhibition and improved survival in in vivo models of multiple myeloma. These results support further development of CYT-338 as a therapeutic for targeting CD38 expressing multiple myeloma cells distinct from daratumumab.

About Cytovia Therapeutics
Cytovia Therapeutics aims to accelerate patient access to transformational cell therapies and immunotherapies, addressing several of the most challenging unmet medical needs in cancer. Cytovia focuses on harnessing the innate immune system by developing complementary and disruptive NK-cell and NK-engager antibody platforms. The company is developing three types of iPSC-derived (or iNK) cells: unedited iNK cells, TALEN® gene-edited iNK cells with improved function and persistence, and TALEN® gene-edited iNK cells with chimeric antigen receptors (CAR-iNKs) to improve tumor-specific targeting. The second complementary cornerstone technology is a quadrivalent multifunctional antibody platform designed to engage natural killer cells by targeting NKp46 using Cytovia's proprietary Flex-NK™ technology.

These two technology platforms are being used to develop treatment for patients with solid tumors such as HCC and glioblastoma as well as hematological malignancies such as refractory multiple myeloma.

Headquartered in Aventura, FL., Cytovia has research and development laboratories in Natick, MA., and a GMP cell manufacturing facility in Puerto Rico. The company's own R&D work is augmented through scientific partnerships with Cellectis, CytoImmune, the Hebrew University of Jerusalem, INSERM, the New York Stem Cell Foundation and the University of California San Francisco (UCSF).

Cytovia has recently formed CytoLynx Therapeutics, a strategic partnership focused on research and development, manufacturing, and commercialization activities in Greater China and beyond.

Find out more at www.cytoviatx.com and follow us on FacebookTwitterLinkedInYouTube, and Instagram.

About CD38
Cluster of differentiation 38 (CD38) is a type II receptor membrane glycoprotein that plays a role in cell adhesion, migration, and signal transduction. Additionally, CD38 is an ectoenzyme involved in generation of nucleotide metabolites, such as ADP-Ribose that regulate cell metabolism. CD38 is highly expressed in multiple myeloma (MM) on malignant plasma cells and is also moderately expressed on normal T, B, NK and myeloid cells. Antibodies targeting CD38, such as daratumumab and isatuximab, are FDA approved for the treatment of MM as monotherapy and in combination.

Additional Information and Where to Find It
Isleworth Healthcare Acquisition Corp. ("Isleworth") (NASDAQ: ISLE) intends to file a registration statement on Form S-4 with the Securities Exchange Commission (the "SEC"), which will include a proxy statement/prospectus, that will be both the proxy statement to be distributed to holders of Isleworth's common stock in connection with its solicitation of proxies for the vote by Isleworth's stockholders with respect to the proposed business combination pursuant to a Merger Agreement and Plan of Reorganization entered into on April 26, 2022, by and between Isleworth,  Cytovia Holdings, Inc., the parent company of Cytovia Therapeutics ("Cytovia"), IHAC First Merger Sub Inc., a direct, wholly-owned subsidiary of Isleworth, IHAC Second Merger Sub LLC, direct, wholly-owned subsidiary of Isleworth, and Isleworth Healthcare Sponsor I, LLC (the "Business Combination") and other matters as may be described in the registration statement, as well as the prospectus relating to the offer and sale of the securities to be issued in the Business Combination. After the registration statement is declared effective, Isleworth will mail a definitive proxy statement/prospectus and other relevant documents to its stockholders. This communication does not contain all the information that should be considered concerning the Business Combination and is not intended to form the basis of any investment decision or any other decision in respect of the Business Combination. Isleworth's stockholders and other interested persons are advised to read, when available, the preliminary proxy statement/prospectus included in the registration statement and the amendments thereto and the definitive proxy statement/prospectus and other documents filed in connection with the Business Combination, as these materials will contain important information about Cytovia, Cytovia Therapeutics, Isleworth and the Business Combination. When available, the definitive proxy statement/prospectus and other relevant materials for the Business Combination will be mailed to stockholders of Isleworth as of a record date to be established for voting on the Business Combination. Stockholders will also be able to obtain copies of the preliminary proxy statement, the definitive proxy statement and other documents filed with the SEC, without charge, once available, at the SEC's website at www.sec.gov, or by directing a request to Isleworth's secretary at 360 Central Avenue, First Central Tower, Suite #800, St. Petersburg, Florida 33701.

Participants in the Solicitation
Isleworth, Cytovia and their respective directors, executive officers and other members of their management and employees, under SEC rules, may be deemed to be participants in the solicitation of proxies from Isleworth stockholders in connection with the proposed transaction. Investors and security holders may obtain more detailed information regarding the names, affiliations and interests of Isleworth directors and executive officers in Isleworth's Annual Report on Form 10-K for the fiscal year ended December 31, 2021, which was filed with the SEC on March 29, 2022. To the extent that holdings of Isleworth securities have changed since the filing of the Annual Report on Form 10-K, such changes have been or will be reflected on Statements of Change in Ownership on Form 4 filed with the SEC. Information regarding the persons who may, under SEC rules, be deemed participants in the solicitation of proxies of Isleworth stockholders in connection with the proposed transaction will be set forth in the proxy statement/information statement/prospectus for the proposed transaction when available. Information concerning the interests of Isleworth participants in the solicitation, which may, in some cases, be different than those of Isleworth Healthcare Acquisition Corp.'s equity holders generally, will be set forth in the proxy statement/information statement/prospectus relating to the proposed transaction when it becomes available.

Forward Looking Statements
This press release may contain forward-looking statements, which 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 potential of Cytovia's FLEX-NK multifunctional engager antibody and iNK cells. Cytovia 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 whether the outcome of preclinical studies will be predictive of clinical trial results. Any forward-looking statements contained in this press release speak only as of the date hereof, and Cytovia 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.

No Offer or Solicitation
This communication is for informational purposes only and is neither an offer to purchase, nor a solicitation of an offer to sell, subscribe for or buy, any securities or the solicitation of any vote in any jurisdiction pursuant to the Business Combination or otherwise, nor shall there be any sale, issuance or transfer or securities in any jurisdiction in contravention of applicable law.

Cision
Cision

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SOURCE Cytovia Therapeutics