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KMID : 0381919980280010083
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Korean Journal of Microscopy
1998 Volume.28 No. 1 p.83 ~ p.90
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Morphological Evidence for the Transport of Dehydrocholic Acid in the Hepatocyte as Revealed by Freeze Fracture Replica
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Shin Young-Chul
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Abstract
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The pathway of intracellular transport of dehydrocholic acid was investigated in the hepatocytes of rats by transmission electron microscopy with conventional and freeze fracture methods. Both in normal and experimental groups, the cis Golgi cisterns were sacculated and faces toward the bile canaliculus. In the experimental group, however, the cis Golgi cisterns showed buds, which were probably separated to be vesicles. Some of the buds were connected to the cisterns with the narrow neck. The vesicles were increased in the vicinity of bile canaliculi. The fusion between vesicles and bile canaliculus were frequently observed in the experimental group. This was particularly well shown in the freeze fracture replica. In the thin section, the vesicles were devoid of visible contents as seen in the bile canaliculli. The evidence suggests that the vesicles are derived from the cis Gogi cistern in the way that buds pinch off, serve as vehicles to transport dehydrocholic acids and fuse to bile canaliculi for exocytosis.
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KEYWORD
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Golgi apparatus, Endoplasmic reticulum, Vesicle, Hepatocyte, Liver, Tauro-cholic acid
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