Effect of fasting, branched-chain amino acids, and glucocorticoids on histone H1 extractability from rat skeletal muscle.
The effect of 72 h fasting, nutritional therapy of fasted rats, and acute and chronic glucocorticoid treatment on the yield of histone H1 from rat hind limb muscles was determined. Fasting significantly enhanced the extractability of muscle H1. The effect of treating starved rats with glucose alone, or with glucose supplemented with branched-chain amino acids (BCAA), or with two commercial preparations of mixtures of essential and non-essential amino acids was evaluated. Treatment of starved rats with glucose alone significantly decreased H1 extractability from muscles, but isocaloric treatment with glucose supplemented with BCAA or two commercial preparations of amino acid mixtures was more effective. Glucocorticoid treatment for 5 days enhanced the yield of H1 from muscles less than starvation. The enhanced H1 extractability from muscles noted in starved rats is similar to that reported in rats with insulinopenic diabetes and may reflect changes in nuclear fragility.
Cheema
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Department of Biology, Bethune-Cookman College, Daytona Beach, Florida 32115.
Western
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Wadley
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Buse
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MG
D000597:Amino Acids, Branched-Chain / Q000097:blood / Q000494:pharmacology*; D000601:Amino Acids, Essential / Q000494:pharmacology*; D000818:Animals; D002467:Cell Nucleus / Q000187:drug effects; D005508:Food Deprivation; D005938:Glucocorticoids / Q000494:pharmacology*; D005947:Glucose; D006657:Histones / Q000302:isolation & purification*; D008297:Male; D009132:Muscles / Q000737:chemistry / Q000187:drug effects* / Q000378:metabolism; D051381:Rats; D017208:Rats, Wistar
D000597:Amino Acids, Branched-Chain; D000601:Amino Acids, Essential; D005938:Glucocorticoids; D006657:Histones; D005947:Glucose