Loading…
Effects of Subcutaneous Fat Stores on Serum Phospholipids and Nonesterified Fatty Acid Lipid Fractions in Periparturient Dairy Cows
Negative energy balance in early lactating dairy cows results in a massive release of fatty acids (FA) into the blood in nonesterified fatty acids (NEFA) form. Large quantities of circulating NEFA may alter the serum FA profile of phospholipids (PL) fraction, which is responsible for cellular plasma...
Saved in:
Published in: | 农业科学与技术:B 2014, Vol.4 (5), p.352-359 |
---|---|
Main Author: | |
Format: | Article |
Language: | Chinese |
Subjects: | |
Online Access: | Get full text |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Summary: | Negative energy balance in early lactating dairy cows results in a massive release of fatty acids (FA) into the blood in nonesterified fatty acids (NEFA) form. Large quantities of circulating NEFA may alter the serum FA profile of phospholipids (PL) fraction, which is responsible for cellular plasma membrane integrity and intercellular signaling. The objective of this study was to determine the effects of subcutaneous fat stores, as assessed by body condition score (BCS) on a scale of one to five, around the time of calving and the subsequent lipomobilization on FA profile of serum NEFA and PL lipid fractions, and on productive performance. Based on BCS, cows were retrospectively dichotomized into two groups: over-conditioned (BCS _〉 3.25) and control (BCS _〈 3.0). 22 cows had serum samples obtained at -28, -7, 8, 18 and 28 d relative to parturition and analyzed for the FA profile of the NEFA and PL fractions. As expected, over-conditioned cows had greater total plasma NEFA concentrations and decreased dry ma |
---|---|
ISSN: | 2161-6264 |