Abstract
Measurement of the entry rate of an intragastric load of [14C]triolein into the plasma in the presence of Triton WR1339 gave similar values for virgin and weaned rats, but significantly lower values for lactating rats. This decreased entry rate (65%) in lactating compared with virgin rats was due to a failure of Triton WR1339 to inhibit the accumulation of [14C]lipid in the mammary gland. This is further evidence that mammary-gland lipoprotein lipase behaves differently from that in white adipose tissue or muscle.
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Selected References
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- Agius L., Blackshear P. J., Williamson D. H. Rates of triacylglycerol entry into the circulation in the lactating rat. Biochem J. 1981 May 15;196(2):637–640. doi: 10.1042/bj1960637. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Borensztajn J., Rone M. S., Kotlar T. J. The inhibition in vivo of lipoprotein lipase (clearing-factor lipase) activity by triton WR-1339. Biochem J. 1976 Jun 15;156(3):539–543. doi: 10.1042/bj1560539. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Clegg R. A. Lipoprotein lipase. Localization on plasma membrane fragments from lactating rat mammary tissue. Biochim Biophys Acta. 1981 May 22;664(2):397–408. doi: 10.1016/0005-2760(81)90062-x. [DOI] [PubMed] [Google Scholar]
- Clegg R. A. Regulation of fatty acid uptake and synthesis in mammary and adipose tissues: contrasting roles for cyclic AMP. Curr Top Cell Regul. 1988;29:77–128. doi: 10.1016/b978-0-12-152829-4.50005-7. [DOI] [PubMed] [Google Scholar]
- Clegg R. A. Triacylglycerol hydrolysis by cells isolated from lactating rat mammary gland. Biochim Biophys Acta. 1981 Mar 23;663(3):598–612. doi: 10.1016/0005-2760(81)90070-9. [DOI] [PubMed] [Google Scholar]
- Duerden J. M., Gibbons G. F. Secretion and storage of newly synthesized hepatic triacylglycerol fatty acids in vivo in different nutritional states and in diabetes. Biochem J. 1988 Nov 1;255(3):929–935. doi: 10.1042/bj2550929. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Eggstein M., Kreutz F. H. Eine neue Bestimmung der Neutralfette im Blutserum und Gewebe. I. Prinzip, Durchführung und Besprechung der Methode. Klin Wochenschr. 1966 Mar 1;44(5):262–267. doi: 10.1007/BF01747716. [DOI] [PubMed] [Google Scholar]
- FELL B. F., SMITH K. A., CAMPBELL R. M. Hypertrophic and hyperplastic changes in the alimentary canal of the lactating rat. J Pathol Bacteriol. 1963 Jan;85:179–188. doi: 10.1002/path.1700850117. [DOI] [PubMed] [Google Scholar]
- FRIEDMAN M., BYERS S. O. The mechanism responsible for the hypercholesteremia induced by triton WR-1339. J Exp Med. 1953 Jan;97(1):117–130. doi: 10.1084/jem.97.1.117. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Jones R. G., Ilic V., Williamson D. H. Regulation of lactating-rat mammary-gland lipogenesis by insulin and glucagon in vivo. The role and site of action of insulin in the transition to the starved state. Biochem J. 1984 Oct 15;223(2):345–351. doi: 10.1042/bj2230345. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Leyton J., Drury P. J., Crawford M. A. Differential oxidation of saturated and unsaturated fatty acids in vivo in the rat. Br J Nutr. 1987 May;57(3):383–393. doi: 10.1079/bjn19870046. [DOI] [PubMed] [Google Scholar]
- Lovo A., Hustvedt B. E. Increased hepatic triacylglycerol secretion in fasted rats with ventromedial hypothalamic lesions. Biochim Biophys Acta. 1975 Oct 21;409(1):51–58. doi: 10.1016/0005-2760(75)90079-x. [DOI] [PubMed] [Google Scholar]
- Mercer S. W., Williamson D. H. Rapid inhibition by intragastric triolein of the re-activation of glucose utilization and lipogenesis in the mammary gland during the starved-refed transition in lactating rats. Evidence for a direct effect of oral lipid on mammary tissue. Biochem J. 1988 Feb 15;250(1):269–276. doi: 10.1042/bj2500269. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Nagata Y., Zilversmit D. B. Blockade of intestinal lipoprotein clearance in rabbits injected with Triton WR 1339-ethyl oleate. J Lipid Res. 1987 Jun;28(6):684–692. [PubMed] [Google Scholar]
- Oller do Nascimento C. M., Ilic V., Williamson D. H. Re-examination of the putative roles of insulin and prolactin in the regulation of lipid deposition and lipogenesis in vivo in mammary gland and white and brown adipose tissue of lactating rats and litter-removed rats. Biochem J. 1989 Feb 15;258(1):273–278. doi: 10.1042/bj2580273. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Oller do Nascimento C. M., Williamson D. H. Evidence for conservation of dietary lipid in the rat during lactation and the immediate period after removal of the litter. Decreased oxidation of oral [1-14C]triolein. Biochem J. 1986 Oct 1;239(1):233–236. doi: 10.1042/bj2390233. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Oller do Nascimento C. M., Williamson D. H. Tissue-specific effects of starvation and refeeding on the disposal of oral [1-14C]triolein in the rat during lactation and on removal of litter. Biochem J. 1988 Sep 1;254(2):539–546. doi: 10.1042/bj2540539. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Otway S., Robinson D. S. The use of a non-ionic detergent (Triton WR 1339) to determine rates of triglyceride entry into the circulation of the rat under different physiological conditions. J Physiol. 1967 May;190(2):321–332. doi: 10.1113/jphysiol.1967.sp008211. [DOI] [PMC free article] [PubMed] [Google Scholar]
- ROBINSON D. S. THE CLEARING FACTOR LIPASE AND ITS ACTION IN THE TRANSPORT OF FATTY ACIDS BETWEEN THE BLOOD AND TISSUES. Adv Lipid Res. 1963;1:133–182. doi: 10.1016/b978-1-4831-9937-5.50010-7. [DOI] [PubMed] [Google Scholar]
- Scanu A. M. Factors affecting lipoprotein metabolism. Adv Lipid Res. 1965;3:63–138. [PubMed] [Google Scholar]
- Schurr P. E., Schultz J. R., Parkinson T. M. Triton-induced hyperlipidemia in rats as an animal model for screening hypolipidemic drugs. Lipids. 1972 Jan;7(1):68–74. doi: 10.1007/BF02531272. [DOI] [PubMed] [Google Scholar]
- Scow R. O., Chernick S. S., Fleck T. R. Lipoprotein lipase and uptake of triacylglycerol, cholesterol and phosphatidylcholine from chylomicrons by mammary and adipose tissue of lactating rats in vivo. Biochim Biophys Acta. 1977 May 25;487(2):297–306. doi: 10.1016/0005-2760(77)90006-6. [DOI] [PubMed] [Google Scholar]
- Stansbie D., Brownsey R. W., Crettaz M., Denton R. M. Acute effects in vivo of anti-insulin serum on rates of fatty acid synthesis and activities of acetyl-coenzyme A carboxylase and pyruvate dehydrogenase in liver and epididymal adipose tissue of fed rats. Biochem J. 1976 Nov 15;160(2):413–416. doi: 10.1042/bj1600413. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Tso P., Balint J. A., Rodgers J. B. Effect of hydrophobic surfactant (Pluronic L-81) on lymphatic lipid transport in the rat. Am J Physiol. 1980 Nov;239(5):G348–G353. doi: 10.1152/ajpgi.1980.239.5.G348. [DOI] [PubMed] [Google Scholar]
- Whitelaw E., Williamson D. H. Effects of lactation of ketogenesis from oleate or butyrate in rat hepatocytes. Biochem J. 1977 Jun 15;164(3):521–528. doi: 10.1042/bj1640521. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Zammit V. A. Regulation of hepatic fatty acid metabolism. The activities of mitochondrial and microsomal acyl-CoA:sn-glycerol 3-phosphate O-acyltransferase and the concentrations of malonyl-CoA, non-esterified and esterified carnitine, glycerol 3-phosphate, ketone bodies and long-chain acyl-CoA esters in livers of fed or starved pregnant, lactating and weaned rats. Biochem J. 1981 Jul 15;198(1):75–83. doi: 10.1042/bj1980075. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Zinder O., Mendelson C. R., Blanchette-Mackie E. F., Scow R. O. Lipoprotein lipase and uptake of chylomicron triacylglycerol and cholesterol by perfused rat mammary tissue. Biochim Biophys Acta. 1976 Jun 22;431(3):526–537. doi: 10.1016/0005-2760(76)90218-6. [DOI] [PubMed] [Google Scholar]