Differential utilization of hepatic and myocardial fatty acids during forced molt of laying hens

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12 Citations (Scopus)

Abstract

Feed was totally withdrawn from laying hens (n = 30, Hy-Line Brown, 608 d of age, 2.04 ± 0.07 kg of mean BW) to induce molting. Ten birds were slaughtered on d O and 12, and the hepatic and myocardial triacylglycerol (TAG) and phospholipid (PL) fatty acid composition, as well as the tissue malondialdehyde (MDA) and reduced glutathione (GSH) concentrations were determined. The liver TAG and PL contents decreased by 24.3 and 16.1%, respectively, whereas the myocardial TAG content increased by 12%, and the PL decreased by 22%. Liver TAG fraction has been found to selectively retain arachidonic and docosahexanoic acids. Hepatic PL fatty acids were markedly affected by fasting; these changes reflected an altered PL metabolism, primarily degradation. Liver TAG compensated for the absence of dietary fatty acids, because we found practically no qualitative alteration in myocardial TAG. The lipid peroxide status, as measured with MDA content was, accordingly, increased in the liver tissue only. In the myocardial PL fatty acids, preferred conservation of arachidonic acid was shown, and it was hypothesized that energy deprivation of cardiomyocytes strongly improved PL degradation in fasting laying hens and influenced PL homeostasis. Generally the physiological recovery from forced molting associated with fasting is complete; however, the use of total feed withdrawal methods should be reevaluated.

Original languageEnglish
Pages (from-to)106-112
Number of pages7
JournalPoultry Science
Volume84
Issue number1
Publication statusPublished - Jan 2005

Fingerprint

laying hens
molting
triacylglycerols
phospholipids
fatty acids
liver
fasting
malondialdehyde
energy deprivation
induced molting
feed deprivation
degradation
peroxides
arachidonic acid
dietary fat
glutathione
homeostasis
fatty acid composition
metabolism
birds

Keywords

  • Forced molt
  • Heart
  • Liver
  • Phospholipid
  • Triacylglycerol

ASJC Scopus subject areas

  • Animal Science and Zoology

Cite this

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title = "Differential utilization of hepatic and myocardial fatty acids during forced molt of laying hens",
abstract = "Feed was totally withdrawn from laying hens (n = 30, Hy-Line Brown, 608 d of age, 2.04 ± 0.07 kg of mean BW) to induce molting. Ten birds were slaughtered on d O and 12, and the hepatic and myocardial triacylglycerol (TAG) and phospholipid (PL) fatty acid composition, as well as the tissue malondialdehyde (MDA) and reduced glutathione (GSH) concentrations were determined. The liver TAG and PL contents decreased by 24.3 and 16.1{\%}, respectively, whereas the myocardial TAG content increased by 12{\%}, and the PL decreased by 22{\%}. Liver TAG fraction has been found to selectively retain arachidonic and docosahexanoic acids. Hepatic PL fatty acids were markedly affected by fasting; these changes reflected an altered PL metabolism, primarily degradation. Liver TAG compensated for the absence of dietary fatty acids, because we found practically no qualitative alteration in myocardial TAG. The lipid peroxide status, as measured with MDA content was, accordingly, increased in the liver tissue only. In the myocardial PL fatty acids, preferred conservation of arachidonic acid was shown, and it was hypothesized that energy deprivation of cardiomyocytes strongly improved PL degradation in fasting laying hens and influenced PL homeostasis. Generally the physiological recovery from forced molting associated with fasting is complete; however, the use of total feed withdrawal methods should be reevaluated.",
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T1 - Differential utilization of hepatic and myocardial fatty acids during forced molt of laying hens

AU - Szabó, A.

AU - Fébel, H.

AU - Mézes, M.

AU - Horn, P.

AU - Balogh, K.

AU - Romvári, R.

PY - 2005/1

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N2 - Feed was totally withdrawn from laying hens (n = 30, Hy-Line Brown, 608 d of age, 2.04 ± 0.07 kg of mean BW) to induce molting. Ten birds were slaughtered on d O and 12, and the hepatic and myocardial triacylglycerol (TAG) and phospholipid (PL) fatty acid composition, as well as the tissue malondialdehyde (MDA) and reduced glutathione (GSH) concentrations were determined. The liver TAG and PL contents decreased by 24.3 and 16.1%, respectively, whereas the myocardial TAG content increased by 12%, and the PL decreased by 22%. Liver TAG fraction has been found to selectively retain arachidonic and docosahexanoic acids. Hepatic PL fatty acids were markedly affected by fasting; these changes reflected an altered PL metabolism, primarily degradation. Liver TAG compensated for the absence of dietary fatty acids, because we found practically no qualitative alteration in myocardial TAG. The lipid peroxide status, as measured with MDA content was, accordingly, increased in the liver tissue only. In the myocardial PL fatty acids, preferred conservation of arachidonic acid was shown, and it was hypothesized that energy deprivation of cardiomyocytes strongly improved PL degradation in fasting laying hens and influenced PL homeostasis. Generally the physiological recovery from forced molting associated with fasting is complete; however, the use of total feed withdrawal methods should be reevaluated.

AB - Feed was totally withdrawn from laying hens (n = 30, Hy-Line Brown, 608 d of age, 2.04 ± 0.07 kg of mean BW) to induce molting. Ten birds were slaughtered on d O and 12, and the hepatic and myocardial triacylglycerol (TAG) and phospholipid (PL) fatty acid composition, as well as the tissue malondialdehyde (MDA) and reduced glutathione (GSH) concentrations were determined. The liver TAG and PL contents decreased by 24.3 and 16.1%, respectively, whereas the myocardial TAG content increased by 12%, and the PL decreased by 22%. Liver TAG fraction has been found to selectively retain arachidonic and docosahexanoic acids. Hepatic PL fatty acids were markedly affected by fasting; these changes reflected an altered PL metabolism, primarily degradation. Liver TAG compensated for the absence of dietary fatty acids, because we found practically no qualitative alteration in myocardial TAG. The lipid peroxide status, as measured with MDA content was, accordingly, increased in the liver tissue only. In the myocardial PL fatty acids, preferred conservation of arachidonic acid was shown, and it was hypothesized that energy deprivation of cardiomyocytes strongly improved PL degradation in fasting laying hens and influenced PL homeostasis. Generally the physiological recovery from forced molting associated with fasting is complete; however, the use of total feed withdrawal methods should be reevaluated.

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