Abstract
BackgroundsDespite the absolute need for life-long treatment of inherited and genetic diseases, there has been little effort to develop such treatments for most of these conditions due to their rarity. Familial lecithin:cholesterol acyltransferase (LCAT) deficiency is recognized as one such orphan disease. We have been developing an adipocyte-based ex vivo gene therapy/regenerative medicine, a novel methodology that differs from the adeno-associated virus-mediated in vivo gene therapy or ex vivo gene-transduced hematopoietic cell therapy, to treat familial LCAT deficiency. Recently, a first-in-human (FIH) clinical study was conducted under the Act on Securement of Safety of Regenerative Medicine, wherein a patient with familial LCAT deficiency was treated. To obtain approval to put this treatment into practical use, a clinical trial has been designed with reference to the FIH clinical study. MethodsAn interventional, open-label, unblinded dose-escalation trial was planned, referring to previous FIH clinical study. The trial aims to evaluate the safety of the investigational product in relation to the characteristics of the investigational product (ex vivo gene/cell therapy product by retroviral vector-mediated LCAT gene transduction) using two doses, and the efficacy of the treatment will be evaluated exploratively. A total of three patients will be enrolled sequentially and followed for 24 weeks after administration. This study is designed as a multicenter trial, with Chiba University Hospital administering and evaluating the safety/efficacy of the investigational products at the prescribed visit. ConclusionThis clinical trial is expected to facilitate the provision of lifelong treatment to many patients with LCAT deficiency. Trial registration numberJapan Registry of Clinical Trials (jRCT2033200096).
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