Gene therapy OR insulin gene therapy OR ("genetic therapy/methods"[MeSH] OR "genetic therapy/therapeutic use"[MeSH]) AND type 1 diabetes OR pancreatic β-cells OR ("diabetes mellitus, type 1/complications"[MeSH] OR "diabetes mellitus, type 1/drug therapy"[MeSH] OR "diabetes mellitus, type 1/genetics"[MeSH] OR "diabetes mellitus, type 1/metabolism"[MeSH] OR "diabetes mellitus, type 1/prevention and control"[MeSH]). This evidence concerns the gene INS and diabetes mellitus.