 New research suggests targeting C5a-C5aR1 axis could limit severe inflammatory responseMARSEILLE, France, July 29, 2020 GLOBE NEWSWIRE -- Innate Pharma SA Euronext Paris: IPH ISIN: FR0010331421; Nasdaq: IPHA Innate or the Company today announced the publication of a Nature paper entitled, Association of COVID-19 inflammation with activation of the C5a-C5aR1 axis, authored by Innate researchers in partnership with scientists from Hôpitaux Universitaires de Marseille AP-HM La Timone and North Hospitals, Laveran Hospital, Aix Marseille University, the Centre dImmunologie de Marseille-Luminy Inserm, CNRS, AMU and Marseille ImmunopoleAP-HM immunoprofiling laboratory at La Timone Hospital. This Marseille-based exploratory research taskforce, named EXPLORE COVID-19, analyzed immune cells in COVID-19 patients at different stages of the disease. The goal of the study was to gain translational insights to better understand the immune response in COVID-19 patients and identify potential targets to fight the viral infection.The study found that patients who progress towards severe COVID-19 disease, including those with severe pneumonia and acute respiratory distress syndrome ARDS, exhibit an activation of the C5aC5aR1 pathway. Specifically, researchers observed high levels of circulating C5a and over-activation of the C5a-dependent myeloid cell pathway, which is believed to contribute to inflammation in the lungs.This research also focused on avdoralimab IPH5401, a clinical-stage monoclonal antibody that blocks C5aR1 CD88. Avdoralimab prevents C5a-induced myeloid cell recruitment and activation. Innate is currently investigating avdoralimab in oncology, which provided pharmacokinetic and safety data prior to investigation in COVID-19.The findings published in Nature suggest that the C5a-C5aR1 axis blockade could be considered as a potential therapeutic strategy for severe respiratory disease associated with SARS-Cov-2 infection. The analysis found the C5a-C5aR1 axis blockade as a means of limiting myeloid cell infiltration at inflammatory sites and preventing the excessive lung inflammation associated with ARDS in COVID-19 patients.There is an urgent need to better understand COVID-19 disease progression and the associated complement cascade to help improve the prognosis of COVID-19 patients who present severe symptoms, said Pr. Eric Vivier, PhD, Chief Scientific Officer at Innate Pharma and Professor at AP-HM, Aix-Marseille University and Centre dImmunologie de Marseille-Luminy InsermCNRSAMU. We are encouraged by this exploratory study, as were beginning to understand the impact of the immune response on the evolution of COVID-19 and pathways able to modulate this response. Based on findings from this study, the Company previously announced the launch of an investigator-sponsored trial named FORCE FOR COVID-19 Elimination. This is a randomized, double-blind Phase II clinical trial to further explore avdoralimab in COVID-19 patients with severe pneumonia, which is currently ongoing.You can read the full publication in Nature here.About the EXPLORE COVID-19 study:Researchers analyzed the immune response of COVID-19 patients with no or few symptoms, patients who require oxygen, and a group of severe patients who require prolonged mechanical ventilation. The study included 82 individuals: 10 healthy controls and 72 COVID-19 patients, including 10 patients presenting few symptoms, 34 patients with pneumonia, and 28 patients with ARDS.Avdoralimab in cancer:Avdoralimab is a therapeutic antibody that specifically binds and blocks C5a receptor 1 C5aR1 expressed on myeloid cells, including monocytes, macrophages and neutrophils. It is currently in Phase I development in solid tumors, including hepatocellular carcinoma and non-small cell lung cancer. Avdoralimab in COVID-19:C5a has been implicated in the pathogenesis of ARDS by promoting a proinflammatory environment, through the attraction of myeloid cells neutrophils, monocytes and macrophages and the stimulation of their cytokines production. Avdoralimab blocks C5aR1 and has the potential to reduce the inflammatory response in the lungs. About Innate Pharma:Innate Pharma S.A. is a commercial stage oncology-focused biotech company dedicated to improving treatment and clinical outcomes for patients through therapeutic antibodies that harness the immune system to fight cancer.Innate Pharmas commercial-stage product, Lumoxiti, in-licensed from AstraZeneca in the US, EU and Switzerland, was approved by the FDA in September 2018. Lumoxiti is a first-in class specialty oncology product for hairy cell leukemia. Innate Pharmas broad pipeline of antibodies includes several potentially first-in-class clinical and preclinical candidates in cancers with high unmet medical need.Innate Pharma has been a pioneer in the understanding of natural killer cell biology and has expanded its expertise in the tumor microenvironment and tumor-antigens, as well as antibody engineering. This innovative approach has resulted in a diversified proprietary portfolio and major alliances with leaders in the biopharmaceutical industry including Bristol-Myers Squibb, Novo Nordisk AS, Sanofi, and a multi-products collaboration with AstraZeneca.Based in Marseille, France, Innate Pharma is listed on Euronext Paris and Nasdaq in the US.Learn more about Innate Pharma at Information about Innate Pharma shares:ISIN code Ticker code LEIFR0010331421 Euronext: IPH Nasdaq: IPHA 9695002Y8420ZB8HJE29 Disclaimer:This press release contains certain forward-looking statements, including those within the meaning of the Private Securities Litigation Reform Act of 1995.The use of certain words, including believe, potential, expect and will and similar expressions, is intended to identify forward-looking statements. Although the company believes its expectations are based on reasonable assumptions, these forward-looking statements are subject to numerous risks and uncertainties, which could cause actual results to differ materially from those anticipated. These risks and uncertainties include, among other things, the uncertainties inherent in research and development, including related to safety, progression of and results from its ongoing and planned clinical trials and preclinical studies, review and approvals by regulatory authorities of its product candidates, the Companys commercialization efforts, the Companys continued ability to raise capital to fund its development and the overall impact of the COVID-19 outbreak on the global healthcare system as well as the Companys business, financial condition and results of operations. For an additional discussion of risks and uncertainties which could cause the companys actual results, financial condition, performance or achievements to differ from those contained in the forward-looking statements, please refer to the Risk Factors Facteurs de Risque section of the Universal Registration Document filed with the French Financial Markets Authority AMF, which is available on the AMF website or on Innate Pharmas website, and public filings and reports filed with the U.S. Securities and Exchange Commission SEC, including the Companys Annual Report on Form 20-F for the year ended December 31, 2019, and subsequent filings and reports filed with the AMF or SEC, or otherwise made public, by the Company.This press release and the information contained herein do not constitute an offer to sell or a solicitation of an offer to buy or subscribe to shares in Innate Pharma in any country.For additional information, please contact:Investors Innate Pharma Tel.: 33 04 30 30 30 Media Innate Pharma Tracy Rossin GlobalUS Tel.: 1 240 801 0076 ATCG Press Marie Puvieux France Tel.: 33 09 81 87 46 72 