Cardiogen belongs to a family of very short peptides — typically two to four amino acids — that researchers refer to as peptide bioregulators. The concept, developed primarily in Russian gerontology and peptide-chemistry research, proposes that specific short peptide sequences are associated with specific tissue types and may interact with gene-expression programs in those tissues.
Cardiogen is the tissue label applied to the cardiac-associated sequence in this research framework. It is studied as a laboratory tool peptide; the broader bioregulator literature remains debated and is not widely replicated outside its originating research groups.