期刊
CELLS
卷 11, 期 20, 页码 -出版社
MDPI
DOI: 10.3390/cells11203325
关键词
bovine; mammary gland development; mammary hierarchy; differentiation; lactation; involution
类别
The mammary gland undergoes repeated cyclic changes throughout the life of mammals. Cattle and buffalo are major milk-producing livestock species that play essential roles in farming communities. The development of the ruminant mammary gland is highly dynamic and involves multiple stages. However, the molecular processes underlying cow udder development have not been thoroughly investigated. This review focuses on the morphological and molecular changes during various stages of cow udder development, providing insights into the physiological differences between cattle and other mammalian species.
The mammary gland is a unique organ with the ability to undergo repeated cyclic changes throughout the life of mammals. Among domesticated livestock species, ruminants (cattle and buffalo) constitute a distinct class of livestock species that are known milk producers. Cattle and buffalo contribute to 51 and 13% of the total milk supply in the world, respectively. They also play an essential role in the development of the economy for farming communities by providing milk, meat, and draft power. The development of the ruminant mammary gland is highly dynamic and multiphase in nature. There are six developmental stages: embryonic, prepubertal, pubertal, pregnancy, lactation, and involution. There has been substantial advancement in our understanding of the development of the mammary gland in both mouse and human models. Until now, there has not been a thorough investigation into the molecular processes that underlie the various stages of cow udder development. The current review sheds light on the morphological and molecular changes that occur during various developmental phases in diverse species, with a particular focus on the cow udder. It aims to explain the physiological differences between cattle and non-ruminant mammalian species such as humans, mice, and monkeys. Understanding the developmental biology of the mammary gland in molecular detail, as well as species-specific variations, will facilitate the researchers working in this area in further studies on cellular proliferation, differentiation, apoptosis, organogenesis, and carcinogenesis. Additionally, in-depth knowledge of the mammary gland will promote its use as a model organ for research work and promote enhanced milk yield in livestock animals without affecting their health and welfare.
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