Interleukin 10 (IL-10) is a multi-cell-derived, multifunctional cytokine that regulates cell growth and differentiation, participates in inflammatory and immune responses, and is a recognized inflammatory and immunosuppressive factor. It plays an important role in tumor, infection, organ transplantation, hematopoietic system and cardiovascular system, and is closely related to blood, digestion, especially cardiovascular system diseases.