Metabolism of radiolabelled chylomicron lipids in intact and hepatectomized rats

John D. Belcher, Lawrence L. Rudel, Moseley Waite

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

1. 1. Intact rats removed more radiolabelled triacylglycerol, cholesterol, and cholesterol ester but not phosphatidylcholine (PC) in the first 6 min than hepatectomized rats. 2. 2. There was no difference between intact and hepatectomized rats in the transfer of radiolabelled chylomicron lipids to other lipoproteins. 3. 3. Specific radioactivity measurements demonstrated a net transfer of PC (intact and hepatectomized rats) and unesterified cholesterol (intact rats only) onto both the low density lipoprotein/high density lipoprotein-I (LDL/HDL1) and HDL2 fractions. 4. 4. [3H]Fatty acids were rapidly incorporated into blood cell phospholipids and into HDL and LDL cholesterol esters of both intact and hepatectomized rats. 5. 5. Substantial rearrangements of [3H]palmitate occurred during lipid uptake by liver.

Original languageEnglish (US)
Pages (from-to)87-96
Number of pages10
JournalComparative Biochemistry and Physiology -- Part B: Biochemistry and
Volume81
Issue number1
DOIs
StatePublished - 1985
Externally publishedYes

Bibliographical note

Funding Information:
Acknowledgements--We are grateful to Virginia Lynn King for her valuable surgical assistance, to Pat Sisson for neutral glyceride and phospholipid mass measurements, and to Gwen Charles for her valuable editorial skills. This work was supported by NIH Grant Am-11799 and NIH SCOR-Arteriosclerosis Grant HL-14164. This work was in partial fulfilment of the requirements for the degree of Doctor of Philosophy (J. B.) whose current address is: Cardiovascular Research Institute, 1315-M, University of California, San Francisco, CA 94143.

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