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Heartseed Inc. and Novo Nordisk A/S say Heartseed has successfully dosed the first patient in a phase 1/2 clinical study (LAPiS Study) with HS-001 – an investigational cell therapy for heart failure. An independent safety evaluation committee has evaluated four-week data on the patient, who lives with advanced heart failure and has given approval for the study to continue. Heart failure Heart failure is a chronic, progressive condition in which the heart muscle is unable to pump enough blood to meet the body’s need for blood and oxygen. The condition leads to frequent hospitalizations, and more than half of people diagnosed with heart failure die within five years. Heart failure affects more than 65 million people globally and is most commonly caused by heart conditions such as ischemic heart disease, cardiomyopathy or high blood pressure. The condition cannot be cured. Current therapies can slow but not halt disease progression and morbidity and mortality remain high. HS-001 is an investigational cell therapy consisting of clusters of purified heart muscle cells (cardiomyocyte spheroids) derived from induced pluripotent stem cells (iPSCs) designed to restore heart muscle and function in patients with advanced heart failure. In several preclinical studies iPSC-derived cardiomyocytes have been shown to improve heart function. Study details The LAPiS Study is a 52-week, phase 1/2, open-label, dose-escalation study in patients with advanced heart failure caused by ischemic heart disease, conducted at various study sites in Japan. HS-001 will be transplanted into the diseased tissue of the heart during open-heart surgery in conjunction with a planned coronary artery bypass graft procedure. The study will enroll 10 patients in two dose cohorts of 50 million and 150 million cardiomyocytes. The primary endpoint of the study is safety at 26 weeks post-transplantation, and secondary efficacy endpoints include left ventricular ejection fraction and myocardial wall motion. “As a cardiologist, I have been working for many years to realize cardiac regeneration medicine in order to treat patients with heart failure whose heart function has deteriorated to the point where they are unable to live their daily lives. To achieve this goal, we established Heartseed and have continued our development with patient safety and benefit as our top priority,” said Keiichi Fukuda, CEO of Heartseed. “We are very pleased to announce that the first transplant of HS-001 has been successfully performed, which is a major first step in establishing a completely new treatment that I have long envisioned. I would like to express our deepest gratitude to all those who have contributed to this project.” “Cell therapy holds the promise to offer truly disease-modifying treatments for people living with serious chronic disease. We are very pleased that our partners from Heartseed have begun clinical testing of this innovative approach to treating heart failure,” said Jacob Sten Petersen, corporate vice president of cell therapy R&D at Novo Nordisk. “We aim to build on Heartseed’s pioneering work in Japan and hope to bring a transformative treatment to people living with heart failure across the globe.” About HS-001 HS-001 consists of allogeneic iPSC-derived, highly purified ventricular cardiomyocyte spheroids. By forming micro-tissue-like spheroids, the retention rate and viability of the cell transplant have been improved in preclinical studies compared to single cell suspensions. The spheroids are transplanted using a special administration needle and guide adapter developed for the administration of the spheroids into the myocardial layer of the heart. The expected mechanism of action is coupling of the transplanted cardiomyocytes to the patient's myocardium, thereby improving cardiac output by remuscularization, as well as secretion of angiogenic factors to form new blood vessels around the transplant site (neovascularization). About the partnership between Heartseed and Novo Nordisk In June 2021, Heartseed and Novo Nordisk announced an agreement whereby Novo Nordisk gained exclusive rights to develop, manufacture and commercialize HS-001 worldwide except in Japan. Heartseed maintained the rights to solely develop HS-001 in Japan, while Novo Nordisk gained rights to co-commercialize the product in Japan with Heartseed with 50/50 profit and cost sharing. Heartseed is eligible to receive payments totalling up to $598 million including $55 million in upfront and near-term milestone payments. Heartseed is also eligible to receive tiered high single-digit to low double-digit royalties of annual net sales outside of Japan.

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