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Vitamin AÌÀù¹À¸·Î ÀÎÇÑ ÊÜá¬øàÀÇ Ú°á¬û¡÷¾ùÊîÜ Ü¨ûù An Ultrastructural Study on the Changes in Hepatocyte of Rat Induced by Vitamin A Deficiency

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Abstract

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ºñŸ¹Î A °áÇÌÀÌ °£¼¼Æ÷¿¡ ¹ÌÄ¡´Â ¿µÃ¢À» ¾Ë¾Æº¸°íÀÚ Lamb½Ä´Ü¿¡ ÀÇÇÑ ºñŸ¹Î A °áÇ̽Ä
ÀÌ·Î Sprague-DawleyÁ¾ ÀÌÀ¯½Ã±âÀÇ ¼ýÄÆ ÈòÁ㸦 20, 40, 60ÀϱîÁö »çÀ°ÇÏ°í °¢°¢ 2, 4, 8¸¶
¸®¾¿ µµ»ìÇÏ¿© °£ÀåÀ» ÀûÃâÇÑ ÈÄ ±¤ÇÐ ¹× ÀüÀÚÇö¹Ì°æÀû °Ë»öÀ» ÇÏ¿´À¸¸ç ±× °á°ú¸¦ ¿ä¾àÇÏ
¸é ´ÙÀ½°ú °°´Ù.
±¤ÇÐÇö¹Ì°æÀûÀ¸·Î´Â °æÇÑ ¿°Áõ¹ÝÀÀ, kupffer¼¼Æ÷ÀÇ Áõ°¡ ¹× °£¼¼Æ÷ ¹è¿­ÀÇ ºÒ±ÔÄ¢¼ºÀÌ °üÂû
µÇ¾ú´Ù.
ÀüÀÚÇö¹Ì°æÀûÀ¸·Î´Â mitochondriaÀÇ ´ë¼ÒºÎµ¿°ú ¸ð¾çÀÇ ÇöÀúÇÑ ºÒ±ÔÄ¢¼º, cristaeÀÇ Áõ°¡
¹× matrixÀüÀڹеµÀÇ Áõ°¡¸¦ º¸¿´´Ù. mitochondriaÀÇ ¿©·¯ ƯÀÌÇÑ º¯È­¿Í ´õºÒ¾î ´Ü¹éÇÕ¼º
°ú ¼ö¼Û¿¡ °ü¿©ÇÏ´Â ¼Ò±â°ü Áï ER, ribosome ¹× GolgiÀåÄ¡ÀÇ ºñ°¡¿ª¼º ¹× °¡¿ª¼º º¯È­°¡
ÇöÀúÇÏ¿´°í, °¡²û multivesicular lysosomeÀÌ ³ªÅ¸³µÀ¸¸ç ±âŸ lysosomeÀÇ Áõ°¡´Â ¹ß°ßµÇÁö
¾Ê¾Ò´Ù.
ÀÌ»óÀÇ ¿¬±¸¼ºÀûÀ¸·Î º¸¾Æ ºñŸ¹Î A °áÇÌÀº ¼±ÃµÀûÀ¸·Î mitochondriaÀÇ º¯È­¸¦ ¾ß±â½Ãų
¼ö ÀÖ°í multivesicular bodyÇü¼ºÀ» À¯µµÇÒ ¼ö ÀÖ´Ù°í ¹Ï¾îÁø´Ù. ¶ÇÇÑ Malloryü Çü¼ºÀº ÀÏ
¾î³ªÁö ¾Ë¾ÒÀ¸¸ç ´Ù¸¥ ¼¼Æ÷ ³» ¸·¼º ±¸Á¶¹°ÀÇ º¯È­µéÀº ÀÌÂ÷ÀûÀÎ °ÍÀ̶ó°í »ý°¢µÈ´Ù.
#ÃÊ·Ï#
In order to investigate the morphologic changes of hepatocyte by vitamin A deficiency,
the author fed vitamin A deficient diet by Lamb's formula to male weanling
Sprague-Dawley rams. Twenty rats were divided into two groups(14 as experimental
group and the rest 6 as control). Two rats of control groups and 2, 4 and 8 rats of
experimental groups were sacrifices 20 th, 40 th and 60 th days and each hepatic tissue
was observed by the light and electron microscopes.
The results were summarized as follows :
Light microscopically, hepatocytes of experimental group showed mild inflammatory
reactions accompanied by Kupffer cell hyperplasia and disarray of hepatic cords. Electron
microscopically, mitochondria showed marked variablity in size and shape with increased
distorted cristae as well as increase of matrix densities. Degenerative changes of the
cellular organelles participating in protein synthesis and transports were noted, suck as
dilatation and fragmentation of RER, shedding of ribosomes, increase of free ribosomes,
atrophy of Golgi complex, and decrease of SER, Lysoaome was not increased but
multivesicular lysosomes were occasionally found.
From the above results, vitamin A deficiency mar specifically alter the morphology of
mitochondria and induce multivesicular body formation. Mallory body formation is not
noted. Changes on the other endomembranous structures are believed to be secondary.

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