Investigation of Long-Chain Polyunsaturated Fatty Acid Metabolism in Lactating Women by Means of Stable Isotope Techniques

2001 ◽  
pp. 169-177 ◽  
Author(s):  
H. Demmelmair ◽  
M. Baumheuer ◽  
B. Koletzko ◽  
K. Dokoupil ◽  
G. Kratl
Keyword(s):  
Fatty Acid ◽  
Stable Isotope ◽  
Polyunsaturated Fatty Acid ◽  
Fatty Acid Metabolism ◽  
Acid Metabolism ◽  
Chain Polyunsaturated Fatty Acid ◽  
Lactating Women ◽  
Isotope Techniques ◽  
Long Chain

Taking the short- or long-chain route: conversion efficiency of alpha linolenic acid to long-chain omega-3 fatty acids in aerial insectivore chicks

2017 ◽  
Author(s):  
Cornelia W. Twining ◽  
Peter Lawrence ◽  
David W. Winkler ◽  
Alexander S. Flecker ◽  
J. Thomas Brenna
Keyword(s):  
Fatty Acid ◽  
Stable Isotope ◽  
Polyunsaturated Fatty Acid ◽  
Aquatic Insects ◽  
Chain Polyunsaturated Fatty Acid ◽  
Tree Swallows ◽  
Omega 3 ◽  
Aerial Insectivores ◽  
Terrestrial Insects ◽  
Long Chain

AbstractFood availability and quality are both critical for growing young animals. In nature, swallows (Tachycineta bicolor) and other aerial insectivores feed on both aquatic insects, which are rich in omega-3 long-chain polyunsaturated fatty acid (LCPUFA) and terrestrial insects, which contain considerably less LCPUFA. Carnivorous mammals and fishes must obtain LCPUFA from diet, as they have lost the capacity to convert the precursor omega-3 ALA into LCPUFA. Thus, the relative value of aquatic versus terrestrial insects depends not only on the fatty acid composition of the prey, but also upon the capacity of consumers to convert ALA into LCPUFA. We used a combination of stable-isotope-labeled fatty acid tracers to ask if, and how efficiently, Tree Swallows can deposit newly synthesized LCPUFA into tissue. Our data show for the first time that Tree Swallows can convert ALA into LCPUFA deposited in liver and skeletal muscle. However, high Tree Swallow demand for LCPUFA combined with low ALA availability in natural terrestrial foods may strain their modest conversion ability. This suggests that while Tree Swallows can synthesize LCPUFA de novo, LCPUFA are ecologically essential nutrients in natural systems. Our findings thus provide mechanistic support for our previous findings and the importance of LCPUFA-rich aquatic insects for Tree Swallows and most likely other aerial insectivores with similar niches.Summary StatementA stable-isotope-labeled tracer reveals the mechanism for omega-3 long-chain polyunsaturated fatty acid (LCPUFA) limitation in a wild avian insectivore, showing that LCPUFA are an ecologically essential nutrient.

The effects of low-ratio n-6/n-3 PUFA on biomarkers of inflammation: a systematic review and meta-analysis

2021 ◽  
Author(s):  
Yali Wei ◽  
Yan Meng ◽  
Na Li ◽  
Qian Wang ◽  
Liyong Chen
Keyword(s):  
Systematic Review ◽  
Fatty Acid ◽  
Polyunsaturated Fatty Acid ◽  
Meta Analysis ◽  
Chain Polyunsaturated Fatty Acid ◽  
Inflammation Markers ◽  
Pufa Supplementation ◽  
Long Chain

The purpose of the systematic review and meta-analysis was to determine if low-ratio n-6/n-3 long-chain polyunsaturated fatty acid (PUFA) supplementation affects serum inflammation markers based on current studies.

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