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Ãʻ곳À» Åõ¿©ÇÑ ÈòÁã ½ÅÀåÀÇ ÃʹÌÇüÅÂÇÐÀû º¯È­ Ultrastructural Changes in Rat Kidney after Lead Acetate Administration

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±èÇöö/Hyun Chul Kim ±è½ÂÇÊ/¹Ú°ü±Ô/±èÇöö/±è½ÂÇÊ/¹Ú°ü±Ô/Seung Pil Kim/Kwan Kyu Park/Hyun Chul Kim/Seung Pil Kim/Kwan Kyu Park

Abstract

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ÀúÀÚ´Â Sprague-Dawley ÈòÁã 48¸¶¸®¸¦ ´ë»óÀ¸·Î Áõ·ù¼ö¿¡ Ãʻ곳À» ¼¯¾î 0.5%ÀÇ ³óµµ·Î
¸¶½Ã°ÔÇÑ ÈÄ ½ÅÀåÀ» ÀûÃâÇÏ¿© ±× º¯È­¸¦ ÃʹÌÇüÅÂÇÐÀûÀ¸·Î °üÂûÇÏ°í Timm ¹ÝÀÀÀ» ½ÃŲ ÈÄ
ÀÇ ³³ÀÇ ÃàÀûÀ§Ä¡¸¦ Åõ°úÀüÀÚÇö¹Ì°æÀ¸·Î °üÂûÇÑ ¼ºÀûÀ» ¿ä¾àÇÏ¸é ´ÙÀ½°ú °°´Ù.
1. Ç÷Áß ³³ ³óµµ´Â ´ëÁ¶±º¿¡¼­´Â 0.92 §¶/§¢À̾ú°í Ãʻ곳 Åõ¿© ÈÄ 2ÁÖ°±º¿¡¼­ Æò±Õ 3.29
§¶/§¢·Î ÃÖ°íÄ¡¸¦ ³ªÅ¸³»¾ú´Ù.
2. ´¢Áß ¥ä-aminolevulinic acid´Â ´ëÁ¶±ºÀº 9.8 §·/creatinine §·À̾ú°í 2ÀϱººÎÅÍ Áõ°¡µÇ
±â ½ÃÀÛÇÏ¿© 8ÁÖ±º¿¡¼­ 71.7 §·/creatinineÀ» ³ªÅ¸³»¾ú´Ù.
3. ÀüÀÚÇö¹Ì°æÀû ¼Ò°ßÀ¸·Î´Â ÁÖ·Î ±ÙÀ§¼¼´¢°ü¿¡¼­ ¸¹Àº º¯È­°¡ ÀÌ·ç¾î Á³À¸¸ç Áö¹æÀûÀÇ
Áõ°¡, ³»ÇüÁú ¼¼¸ÁÀÇ È®Àå ¹× °øÆ÷È­, ¹ÌÅäÄܵ帮¾ÆÀÇ Á¾Ã¢, ¸®¼Ò¼Ø ¹× ¼öÃʸð¾ç ÀÜ·ùüÀÇ
Áõ°¡¿Í ÇÙ³»ºÀÀÔüÀÇ ÃâÇöµîÀ̸ç ÀÌ·¯ÇÑ º¯È­µéÀº Ãʻ곳 Åõ¿©ÈÄ 8ÁÖ°±º¿¡¼­ °¡Àå Àú¸íÇÏ
¿´´Ù.
4. Timm ¹ÝÀÀÀ» ÀÏÀ¸Å² ÈÄÀÇ Åõ°úÀüÀÚÇö¹Ì°æÀû ¼Ò°ßÀº ³³ °ú¸³µéÀÌ ÁÖ·Î ±ÙÀ§¼¼´¢°ü°­¿¡
Á¸ÀçÇØ ÀÖ¾ú°í ÀϺδ ¿øÇüÁú¸·¿¡ µÑ·¯½ÎÀÌÁö ¾ÊÀºÃ¤ ±ÙÀ§¼¼´¢°ü¼¼Æ÷ÀÇ ¹Ì¼¼ÀÀ¸ð »çÀÌ¿¡ Á¸
ÀçÇØ À־ ´Ü¼øÈ®»ê¿¡ ÀÇÇÑ ÀçÈí¼ö·Î »ç·áµÇ¾ú´Ù.
ÀÌ»óÀÇ ¼Ò°ßÀ» Á¾ÇÕÇØ º¸¸é ȺÁã¿¡°Ô Ãʻ곳À» °æ±¸ Åõ¿©ÇßÀ» ¶§ÀÇ ÁÖµÈ ¼Õ»óºÎÀ§´Â ±ÙÀ§
¼¼´¢°üÀ¸·Î »ý°¢µÇ°í, Ãʱ⿡´Â °¡¿ªÀûÀÎ º¯È­À̳ª ³ªÁß¿¡´Â ÇÙÀÇ º¯È­ ¹× Æı«±îÁö ÃÊ·¡µÇ
´Â ºñ°¡¿ªÀûÀÎ º¯È­±îÁö ÃÊ·¡µÇ¾ú´Ù. ³³ÀÇ ÃàÀû ºÎÀ§´Â »ç±¸Ã¼¸¦ ÅëÇØ ´¢°­À¸·Î ºüÁ® ³ª°£
µÚ ±ÙÀ§¼¼´¢°ü¼¼Æ÷¿¡¼­ ´Ü¼øÈ®»ê¿¡ ÀÇÇÑ ÀçÈí¼ö°úÁ¤À» ÅëÇØ ±ÙÀ§¼¼´¢°ü ¼¼Æ÷³»·Î ÇÔÀԵȴÙ
°í ¹Ï¾îÁö³ª ¼¼Æ÷³» Á¤È®ÇÑ ¼Ò±â°üÀÇ ÃàÀû ºÎÀ§¿¡ °üÇؼ­´Â ÃßÈÄ ´õ ¿¬±¸µÇ¾î¾ß ÇÒ °ÍÀ¸·Î
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#ÃÊ·Ï#
This study was carried out to investigate the ultrastructural findings of rats after
administration of 0.5% lead acetate with drinking water. The Sprague-Dawley rats were
divided into control and experimental groups. The control group was composed of 12
rats and was orally administered with 0.5% sodium acetate. The experimental group was
composed of 36 rats and orally administered with 0.5% lead acetate. Two rats in the
control group and four rats in the experimental group were sacrificed on day 2, and
week 1, 2, 4, 6 and 8 after administration.
The kidney was extirpated and examined by electron microscopy. The results obtained
were as follows:
The blood lead concentration in the experimental group began to increase from the
second day after administration and it increased gradually until the 6th week and it
decreased at the 8 week. The urinary excretion of ¥ä-ALA also increased from the
secondary and gradually increased up to the 8th week.
On electron microscopic examination, the proximal tubular cells showed fat droplets,
dilatation of the endoplasmic reticulum, mitochondrial swelling, increased numbers of
secondary lysosomes and myelin figure-like residual bodies and intranuclear inclusion
bodies. All these findings peaked at the eighth week after administration. Ultrastructural
findings after Timm sulphide silver reaction revealed the lead granules in the proximal
tubular lumen and between the microvilli of the proximal tubular cells without
membrane-bounded.
It can be concluded that most of the changes of micro-organelles are compatible with
degenerative changes of lead exposure and passive diffusion of lead granules are
involved in the proximal tubular cells.

Å°¿öµå

Lead; Kidney; Timm sulphide; Electron microscopy;

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