Inhibition of cholesterol synthesis in mammary tissue, lung, and kidney following cholesterol feeding in the lactating rat

Research output: Contribution to journalArticle

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Abstract

Pregnant rats were randomly allocated to one of 3 experimental dietary groups: Group 1-15.5% butter, 2% cholesterol, 0.78% sodium cholate purified diet; Group 2-standard rat diet with the addition of 10% lard and 2% cholesterol, and Group 3-standard rat diet. Plasma and milk cholesterol at 10 days postpartum were significantly elevated in dams fed exogenous cholesterol. The rat of incorporation of [1-14C] acetate into digitonin-precipitable sterols of mammary tissue slices from dams in Group 1 and Group 2 was eight-fold and two-fold, respectively, less than controls. Mammary tissue cholesterol was greater in dams fed dietary cholesterol. Thus, our data, for the first time, demonstrate that cholesterol synthesis in lactating rat mammary tissue is suppressed following cholesterol feeding. In a second experiment, the rate of incorporation of [1-14C] acetate into digitonin-precipitable sterols in kidney and lung tissue of Group 1 rats was suppressed; however, this response was not as marked as that observed in lactating mammary tissue. The concentration of cholesterol in kidney and lung was greater than controls. These results suggest that extrahepatic inhibition of cholesterol synthesis exists in the rat with a concomitant increase in tissue cholesterol.

Original languageEnglish (US)
Pages (from-to)907-912
Number of pages6
JournalLipids
Volume14
Issue number11
DOIs
StatePublished - Nov 1 1979

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Rats
Breast
Cholesterol
Tissue
Kidney
Lung
Nutrition
Dams
Digitonin
Sterols
Diet
Acetates
Sodium Cholate
Dietary Cholesterol
Butter
Postpartum Period
Milk
Plasmas

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Organic Chemistry
  • Cell Biology

Cite this

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title = "Inhibition of cholesterol synthesis in mammary tissue, lung, and kidney following cholesterol feeding in the lactating rat",
abstract = "Pregnant rats were randomly allocated to one of 3 experimental dietary groups: Group 1-15.5{\%} butter, 2{\%} cholesterol, 0.78{\%} sodium cholate purified diet; Group 2-standard rat diet with the addition of 10{\%} lard and 2{\%} cholesterol, and Group 3-standard rat diet. Plasma and milk cholesterol at 10 days postpartum were significantly elevated in dams fed exogenous cholesterol. The rat of incorporation of [1-14C] acetate into digitonin-precipitable sterols of mammary tissue slices from dams in Group 1 and Group 2 was eight-fold and two-fold, respectively, less than controls. Mammary tissue cholesterol was greater in dams fed dietary cholesterol. Thus, our data, for the first time, demonstrate that cholesterol synthesis in lactating rat mammary tissue is suppressed following cholesterol feeding. In a second experiment, the rate of incorporation of [1-14C] acetate into digitonin-precipitable sterols in kidney and lung tissue of Group 1 rats was suppressed; however, this response was not as marked as that observed in lactating mammary tissue. The concentration of cholesterol in kidney and lung was greater than controls. These results suggest that extrahepatic inhibition of cholesterol synthesis exists in the rat with a concomitant increase in tissue cholesterol.",
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Inhibition of cholesterol synthesis in mammary tissue, lung, and kidney following cholesterol feeding in the lactating rat. / Kris-Etherton, Penny Margaret; Frantz, I. D.

In: Lipids, Vol. 14, No. 11, 01.11.1979, p. 907-912.

Research output: Contribution to journalArticle

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