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Influence of acute injection of chloroquine on the biliary secretion of lipids and lysosomal enzyme on rats

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Lipids

Abstract

Phospholipids and cholesterol combine with a protein fraction (IgA and an acid polypeptide) in bile to form the bile lipoprotein complex.

We wished to determine whether lysosomes participated only in IgA secretion or if their secretory role also involved the lipid components of the bile complex. This aspect was studied with a single acute injection of chloroquine, a lysosomotropic drug. The results show that a nonnegligible quantity of IgA travels through the lysosomes. In addition, phospholipid and cholesterol levels undergo a significant (P<0.05) decrease 1 hr after injection before increasing to normal levels. In contrast to the total inhibition of protein secretion (β-glucuronidase, acid phosphatase), a transitory decrease of the secretion of bile lipids takes place that suggest secretory mechanisms involving organelles other than lysosomes.

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Abbreviations

IgA:

Immunoglobulin A

IgG:

Immunoglobulin G

CMP:

Cytidine monophosphate

BLC:

Bile lipoprotein complex

HDL:

High density lipoproteins

LDL:

Low density lipoproteins

VLDL:

Very low density lipoproteins

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Lafont, H., Chanussot, F., Dupuy, C. et al. Influence of acute injection of chloroquine on the biliary secretion of lipids and lysosomal enzyme on rats. Lipids 19, 195–201 (1984). https://doi.org/10.1007/BF02534797

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  • DOI: https://doi.org/10.1007/BF02534797

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