Embryonic Circadian Rhythm Establishment, Homeostasis, and Dysfunction During Organogenesis.

Background: Circadian rhythms play a crucial role in the management of the temporal organization of various physiological and cellular processes in mammalian cell types. These rhythms are involved in the regulation of the cell cycle and metabolism and have implications for pathogenesis and physiological homeostasis. Therapeutic approaches that target circadian regulation are emerging for the treatment of digestive disorders, metabolic diseases, and cancer. The proper coordination of cellular clocks is essential for tissue homeostasis and metabolic health. Methods: The exact mechanisms governing the development and regulation of the circadian clock during embryo development are still unclear. However, embryo rhythms, such as those in the suprachiasmatic nucleus (SCN), liver, kidney, adrenal gland, and intestinal system, are believed to be influenced by maternal rhythms during different stages of embryo development. These rhythms then oscillate independently from the timing marked as the key to embryo development. In this review, we synthesize our laboratory experience and summarize current research to provide insight into how circadian rhythms regulate and synchronize organ functions for growth and differentiation during embryo development. Results: Our laboratory experience and current research suggest that circadian rhythms are involved in the regulation of organ functions during embryo development. Maternal rhythms may entrain embryo rhythms during specific developmental stages, leading to independent oscillation and coordination of organ functions. This knowledge has implications for regenerative medicine and potential clinical applications. Conclusions: Circadian rhythms play a crucial role in the coordination and synchronization of organ functions for growth and differentiation during embryo development. Understanding the regulation of circadian rhythms in embryos can provide valuable information for regenerative medicine and potential clinical applications. More research is needed to fully unravel the mechanisms underlying circadian clock development and regulation during embryo development.