# Regulation of Key Genes for Milk Fat Synthesis in Ruminants

## TL;DR

This paper explains how key genes regulate milk fat synthesis in ruminants, offering insights for improving milk quality and breeding.

## Contribution

The study constructs a comprehensive regulatory network of genes involved in ruminant milk fat synthesis.

## Key findings

- Multiple key genes are involved in ruminant milk fat synthesis, including ACSS2, FASN, and CD36.
- The regulation model spans fatty acid synthesis and lipid droplet secretion in mammary epithelial cells.
- The study provides a theoretical basis for understanding milk fat regulation in ruminants.

## Abstract

Milk fat is the most important and energy-rich substance in milk and plays an important role in the metabolism of nutrients during human growth and development. It is mainly used in the production of butter and yogurt. Milk fat not only affects the flavor and nutritional value of milk, but also is the main target trait of ruminant breeding. There are many key genes involve in ruminant milk fat synthesis, including ACSS2, FASN, ACACA, CD36, ACSL, SLC27A, FABP3, SCD, GPAM, AGPAT, LPIN, DGAT1, PLIN2, XDH, and BTN1A1. Taking the de novo synthesis of fatty acids (FA) and intaking of long-chain fatty acids (LCFA) in blood to the end of lipid droplet secretion as the mainline, this manuscript elucidates the complex regulation model of key genes in mammary epithelial cells (MECs) in ruminant milk fat synthesis, and constructs the whole regulatory network of milk fat synthesis, to provide valuable theoretical basis and research ideas for the study of milk fat regulation mechanism of ruminants.