Please use this identifier to cite or link to this item: https://ir.swu.ac.th/jspui/handle/123456789/12488
ชื่อเรื่อง: High ambient temperature directly decreases milk synthesis in the mammary gland in Saanen goats
ผู้แต่ง: Saipin N.
Semsirmboon S.
Rungsiwiwut R.
Thammacharoen S.
วันที่เผยแพร่: 2020
บทคัดย่อ: The mammary gland is a privileged organ for mammals. Because of their high capacity for milk synthesis, dairy ruminants have been distributed throughout the world. In tropical areas, dairy animals face high ambient temperatures (HTa). The indirect effect of HTa on milk synthesis is mediated in part by a reduction in feed intake. The current experiment focused on the direct natural effect of HTa on mammary function. Multiparous Saanen goats were used in this study. The physiological responses for HTa were evaluated from the control period during the winter and from the natural HTa during the summer. Milk samples were collected for isolation of the goat milk cells to study the expression of the β-1,4 galactosyltransferase (β-GALT1), Akt, and heat shock protein 70 (HSP70) genes. Although goats in the summer maintained rectal temperature and plasma cortisol levels similar to those observed in the winter, the higher respiratory rate and lower feed intake and milk yield (MY) from the goats in the summer indicated that the goats in the summer were exposed to a higher degree of HTa. This was supported by the significantly higher level of plasma glutathione peroxidase (GPX) activity. Moreover, the relative expression levels of β-GALT1 and Akt were not different. The relative expression of HSP70 during the summer was significantly higher than what was observed in cells isolated in the winter. In conclusion, the HTa effect on MY during the summer was related to its indirect effect on feed intake. The direct HTa effect might be related to HSP70 gene expression in goat milk cells and to plasma GPX activity. However, the natural HTa did not affect the expression of Akt or β-GALT1. © 2020 Elsevier Ltd
URI: https://ir.swu.ac.th/jspui/handle/123456789/12488
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85096502665&doi=10.1016%2fj.jtherbio.2020.102783&partnerID=40&md5=66e9dcf052e69bd8e25a06ccfb35764e
ISSN: 3064565
Appears in Collections:Scopus 1983-2021

Files in This Item:
There are no files associated with this item.


Items in SWU repository are protected by copyright, with all rights reserved, unless otherwise indicated.