Abstract
This study was undertaken in vitro to examine the rat jejunal uptake of cholesterol from phospholipid vesicles and from mixed bile salt micelles, under conditions of low effective resistance of the intestinal unstirred water layer. Cholesterol uptake Jd, occurred from vesicles only when the cholesterol: phospholipid ratio was high. The addition of phospholipid (PL) to micelles comprising 20 mM taurodeoxycholic acid (TDC) extended the concentration of cholesterol, beyond which the relationship between cholesterol concentration and uptake remained linear. When the concentration of cholesterol in the bulk phase was held constant and the concentration of TDC or of PL added to the TDC was increased, there was a decline in cholesterol uptake; this effect was masked when the concentration of TDC was high, or when higher concentrations of PL were added to the mixed micelle. When increasing concentrations of palmitic acid were added to mixed micelles composed of cholesterol, TDC and PL, the uptake of cholesterol decreased; in contrast, cholesterol uptake progressively increased when palmitic acid was added to simple TDC micelles. The results suggest that the mechanism responsible for cholesterol uptake may vary, depending on the nature of the constituents of the micelle, and it is proposed that PL inhibits the intestinal uptake of cholesterol by altering the partitioning of cholesterol out of the micelle.
Similar content being viewed by others
References
Hoffman, N.E. (1970) Biochim. Biophys. Acta 196, 193–203.
Watt, S.M., and Simmonds, W.J. (1971) Biochim. Biophys. Acta 225, 347–355.
Feldman, E.B., and Cheng, C.Y. (1975) Am. J. Nutr. 28, 692–698.
O'Doherty, P.J.A., Kakis, G., and Kuksis, A. (1973) Lipids 8, 249–255.
Tso, P., Balint, J.A., and Simmonds, W.J. (1976) Gastroenterology 13, 1362–1367.
Tso, P., Lam, J., and Simmonds, W.J. (1978) Biochim. Biophys. Acta 538, 364–372.
Rampone, A.J. (1972) J. Physiol. 227, 889–898.
Schiff, E.R., Small, N.C., and Dietschy, J.M. (1972) J. Clin. Invest. 51, 1351–1362.
Saunders, D.R., and Dawson, A.M. (1963) Gut 4, 254–260.
Saunders, D.R., and Sillery, J. (1976) Lipids 11, 830–832.
Rodgers, J.B., and O'Connor, P.J. (1975) Biochim. Biophys. Acta 409, 192–200.
O'Connor, P.J., and Rodgers, J.B. (1976) Biochim. Biophys. Acta 450, 402–409.
Rodgers, J.B., Fondacaro, J.D., and Kot, J. (1977) J. Lab. Clin. Med. 89, 147–152.
O'Connor, P.J., Loiudice, T.A., Bochenek, W., and Rodgers, J.B. (1978) Am. J. Dig. Dis. 23, 316–320.
Fondacaro, J.D., and Rodgers, J.B. (1978) Dig. Dis. Sci. 23, 12–17.
Rampone, A.J. (1973) J. Physiol. 229, 495–503.
Rampone, A.J. (1973) J. Physiol. 229, 505–514.
Carey, M.C., and Small, D.M. (1972) Arch. Int. Med. 130, 506–527.
Mazen, N.A., Kwasnick, R.F., Carey, MC., and Benedek, G.B. (1977) in Micellization, Solubilization and Microemulsions (Mittal, K.L., ed.) Vol. 1, pp. 388–401, Plenum Press, New York, NY
Feldman, E.B. (1968) Biochem. Med. 2, 136–144.
Lukie, B.E., Westergaard, H., and Dietschy, J.M. (1974) Gastroenterology 67, 652–661.
Westergaard, H., and Dietschy, J.M. (1974) J. Clin. Invest. 54, 718–732.
Sallee, V.L. (1974) J. Lipid Res. 15, 56–64.
Helenius, A., and Simons, K. (1975) Biochim. Biophys. Acta 415, 29–79.
Sallee, V.L. (1978) J. Lipid Res. 19, 207–214.
Ammar, H.V., Thomas, P.J., and Phillips, S.F. (1978) Lipids 14, 395–400.
Rampone, A.J., and Lang, L.R. (1977) Biochim. Biophys. Acta 486, 500–510.
Tyrrell, D.A., Ryman, B.E., Keetan, B.R., and Dubowitz, V. (1976) Br. Med. J. 2, 88.
Dapergolos, G., Neerunjun, E.D., and Gregoriadis, G. (1976) FEBS Lett. 63, 235–239.
Patel, H.M., and Ryman, B.E. (1976) FEBS Lett. 62, 60–63.
Patel, H.M., and Ryman, B.E. (1977) Biochem. Soc. Trans. 5, 1054–1055.
Patel, H.M., and Ryman, B.E. (1977) Biochem. Soc. Trans. 5, 1739–1741.
Patel, H.M., Harding, N.G.L., Logue, F., Kesson, C., MacCuish, A.C., McKenzie, J.C., Ryman, B.E., and Scobie, I. (1978) Biochem. Soc. Trans. 6, 785–789.
Ryman, B.E., Jewkes, R.F., Jeyasingh, K., Osborne, M.P., Patel, H.M., Richardson, V.J., Tattersall, M.H.N., and Tyrrell, D.A. (1978) An. N.Y. Acad. Sci. 308, 281–307.
Gregoriadis, G. (1976) N. Engl. J. Med. 295, 704–710, 765–779.
Gregoriadis, G. (1976) in Methods in Enzymology (Mosbach, K., ed.) Vol. 44, pp. 698–709, Academic Press, New York, NY.
Westergaard, H., and Dietschy, J.M. (1976) J. Clin. Invest. 58, 97–108.
Thomson, A.B.R. (1980) J. Lipid Res. 2, 1097–1107.
Sallee, V.L., Wilson, F.A., and Dietschy, J.M. (1972) J. Lipid Res. 13, 184–192.
Singh, A., Balint, J.A., Edmonds, R.H., and Rodgers, J.B. (1972) Biochim. Biophys. Acta 260, 708–715.
Ponz de Leon, M., Carulli, N., Loria, P., Lori, R., and Zironi, F. (1979) Gastroenterology 77, 223–230.
Small, D.M. (1971) in The Bile Acids, Chemistry, Physiology and Metabolism (Nair, D.P., and Kritchevsky, D., eds.) Vol. 1, pp. 249–356, Plenum Publishing Co., New York, NY.
Author information
Authors and Affiliations
About this article
Cite this article
Thomson, A.B.R., Cleland, L. Intestinal cholesterol uptake from phospholipid vesicles and from simple and mixed micelles. Lipids 16, 881–887 (1981). https://doi.org/10.1007/BF02534992
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02534992