Role of Leptin in Productivity of Dairy Cows

摘要

LEPTIN ACTS AS AN ENERGY RESERVE SIGNAL FOR HYPOTHALAMIC REGIONS THAT CONTROL FEEDING BEHAVIOR, METABOLISM AND ENDOCRINE FUNCTION SO AS TO MAINTAIN ENERGY HOMEOSTASIS. LEPTIN ACTS AS AN ENDOCRINE LINK BETWEEN NUTRITION AND FERTILITY IN DAIRY COWS. THERE IS A RELATIONSHIP BETWEEN PLASMA LEPTIN, BODY FATNESS AND FEED INTAKE. IN LACTATING COWS, THE POST PARTUM PERIOD OF NEGATIVE ENERGY BALANCE HAS BEEN LINKED TO REDUCED LEPTIN LEVELS AND DELAYED RESUMPTION OF CYCLICITY. INTERPLAY BETWEEN NUTRITION AND ADIPOSITY ACCOUNTS FOR MOST OF THE CHANGES IN PLASMA LEPTIN IN THE PERIPARTURIENT DAIRY COW AND THEREBY MILK PRODUCTION AND REPRODUCTION OF DAIRY COWS.