A chalone is a type of polypeptide or protein substance that is produced and secreted by the cells of an organ. Chalones help to regulate the growth and regeneration rate of tissues in the organ from which it is secreted.
Chalones carry out their function by inhibiting the process of DNA synthesis in cells, indirectly controlling the rate of cell division. This is a form of negative feedback, ensuring that the growth and regeneration of an organ or tissue is kept in balance and not excessive.
The concept of chalones was first identified in the 1960s in the study of cell proliferation in the skin and liver, leading to further investigations in other tissues.
They have also been studied for their potential roles in cancer therapy and other diseases related to cell proliferation. However, the exact nature and mechanisms of chalones are still not fully understood.
