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ÀÎü¾Ç¼ºÁ¾¾ç¿¡¼­ÀÇ »õ·Î¿î 90 kDa Stress ProteinÀÇ ¹ßÇö¿¡ °üÇÑ ¿¬±¸ The Expression of a Novel 90 kDa Stress Protein in Human Malignant Neoplasms

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Abstract

¼­·Ð
¸ðµç ¼¼Æ÷´Â ¾î¶² ¼Õ»óÀ» ¹Þ¾ÒÀ» ¶§, ±× ¼Õ»óÀ» ȸº¹Çϱâ À§ÇÏ¿© ƯÁ¤ ´Ü¹éÁúÀ» ¹ßÇöÇÑ´Ù.
À̶§ ¹ßÇöµÇ´Â ´Ü¹éÁúÀ» stress proteinÀ̶ó ÇÑ´Ù. Stress proteinÀÇ ´ëÇ¥ÀûÀÎ °ÍÀ¸·Î Á¤»ó
¼¼Æ÷¿¡ ¿Âµµ¸¦ °©Àڱ⠻ó½Â½ÃÄÑ ÀÚ±ØÀ» ÁÖ¾úÀ» ¶§ ¹ßÇöÀÌ Áõ°¡µÇ´Â ´Ü¹éÁúÀÎ heat-shock
protein (HSP)ÀÌ ÀÖ´Ù. HSP´Â ¿ÂµµÀÇ »ó½Â»Ó¸¸ ¾Æ´Ï¶ó »ý¸®ÇÐÀû, ¹°¸®È­ÇÐÀû, ȯ°æÀûÀΠħ
ÇØ, ¿µ¾çºÐ °áÇÌ, À¯¸® »ê¼Ò±â(oxygen radical), Á߱ݼÓ, ´ë»çÀúÇØ ¹°Áú ±×¸®°í ¹Ì»ý¹°ÀÇ °¨
¿° µî¿¡ ÀÇÇØ ¹ßÇöÀÌ À¯µµµÈ´Ù. HSP´Â ºÐÀÚ·®¿¡ µû¶ó hsp60 (¾à 60 kDa), hsp70 (¾à 70
kDa), hsp90 (¾à 90 kDa) ±×¸®°í GRP 94 (glucose regulated protein)·Î ºÐ·ùµÈ´Ù. À̵éÀº
¼¼±Õ¿¡¼­ºÎÅÍ Àΰ£¼¼Æ÷¿¡ À̸£±â±îÁö ¸ðµç Á¾·ùÀÇ ¼¼Æ÷¿¡ ºÐÆ÷ÇÏ°í ÀÖÀ¸¸ç, stress¸¦ ¹ÞÁö
¾ÊÀº Á¤»ó¼¼Æ÷¿¡¼­µµ ¼Ò·®¾¿ Á¸ÀçÇÏ¿© ¼¼Æ÷ÀÇ ´ë»ç È°µ¿¿¡ ÇʼöÀûÀÎ ¿ªÇÒÀ» ¼öÇàÇÏ°í ÀÖ´Ù.
»Ó¸¸ ¾Æ´Ï¶ó Á¾¾ç¼¼Æ÷¿¡¼­µµ Áß¿äÇÑ ¿ªÇÒÀ» ÇÏ´Â °ÍÀ¸·Î º¸°íµÇ°í ÀÖ´Ù. ÃÖ±Ù¿¡ º» ¿¬±¸Áø
ÀÇ ¿¬±¸ °á°ú¿¡ ÀÇÇÏ¸é ¾î·ù¼¼Æ÷¿¡¼­ ¹ÙÀÌ·¯½ºÀÇ °¨¿°, heat shock, Áß±Ý¼Ó Ã³¸® µî¿¡ ÀÇÇÏ
¿© ¹ßÇöÀÌ Áõ°¡µÇ´Â novel 90 kDa stress proteinÀÌ ¹ß°ßµÇ¾ú´Ù. ÀÌ ´Ü¹éÁúÀÇ
trypsin-digested peptidesÀÇ internal N-terminal ¾Æ¹Ì³ë»ê ¹è¿­À» ºÐ¼®ÇÑ °á°ú ±âÁ¸¿¡ Á¸Àç
ÇÏ´Â stress protein°ú´Â homology¸¦ º¸ÀÌÁö ¾Ê´Â »õ·Î¿î ´Ü¹éÁú·Î È®ÀÎ µÇ¾ú´Ù. ¶ÇÇÑ ¾î·ù
¼¼Æ÷ »Ó¸¸ ¾Æ´Ï¶ó mouse, rat µî°ú °°Àº µ¿¹°°ú »ç¶÷ÀÇ ¼¼Æ÷¿¡µµ Á¸ÀçÇÏ°í ÀÖ´Â °ÍÀ¸·Î ¹à
ÇôÁ³À¸¸ç, ¿¬±¸ °á°ú ÀÌ ´Ü¹éÁúÀº, µ¿¹°ÀÇ °æ¿ì, Á¤»óÀûÀÎ Á¶Á÷¼¼Æ÷¿¡¼­´Â °ÅÀÇ ¹ßÇöµÇÁö ¾Ê
¾ÒÀ¸³ª, º¯Çü¼¼Æ÷(transformed cell)¿¡¼­´Â ¹ßÇöÀÌ Áõ°¡µÇ´Â °ÍÀ¸·Î È®ÀεǾú´Ù. µû¶ó¼­ º»
¿¬±¸¿¡¼­´Â ¿©·¯ Á¾·ùÀÇ »ç¶÷ÀÇ ¾ÏÁ¶Á÷À» ´ë»óÀ¸·Î ÇÏ¿© ÀÌ ´Ü¹éÁúÀÇ ¹ßÇö ¿©ºÎ¸¦ LeeµîÀÌ
Á¦ÀÛÇÑ nobel 90 kDa stress protein¿¡ ´ëÇÑ ´ÜÀÏ À»·Ð Ç×ü¸¦ ÀÌ¿ëÇÏ¿© ÆĶóÇÉ Æ÷¸Å Á¶Á÷
ÀýÆí¿¡ ¸é¿ªÁ¶Á÷È­ÇÐ ¿°»ö¹ý(immunohistochemical staining)À¸·Î ÀÏÂ÷ ºÐ¼® ÇÏ¿´À¸¸ç,
Western blot, Northern blotÀ» ¼öÇàÇÔÀ¸·Î½á ƯÁ¤Á¾¾ç¿¡ ´ëÇÑ ÀÌ 90 kDa stress proteinÀÇ
¹ßÇöÁ¤µµ¸¦ ±Ô¸íÇÏ¿´´Ù. ¶ÇÇÑ Ç÷¾× ³»¿¡ Á¸ÀçÇÏ´Â novel 90 kDa stress protein¿¡ ´ëÇÑ Ç×ü
ÀÇ Á¸Àç¿©ºÎ¸¦ ELISA (enzyme linked immunosorbent assay)¸¦ ÀÌ¿ëÇÏ¿© È®ÀÎÇÏ¿´´Ù.

Purpose : When cells are subjected to stressful stimuli such as, heat shock, toxic
metal, nutrient deprivation, and metabolic disruption, they increase production of specific
stress proteins that buffer them from harm. We reported that the expression of a novel
90 kDa cellular protein was increased by the infection of a fish rhabdovirus and heat
shock in a fish cell. This new 90 kDa protein is not expressed in normal animal tissues
but is highly induced in progressively transforming tissues or cells. That gives us some
ideas that it is possible for this stress protein to be expressed in specific human cancer
tissues.
Materials and Methods: Commercialized checkerboard multi-tumor block (DAKO Co.
Carpinteria, CA) was used for immunohistochemical analysis. The samples of human
gastric cancer, colon cancer and breast cancer tissues were evaluated by Western blot
and Northern blot for overexpression of the novel 90 kDa stress protein. Sera of those
patients were analyzed by ELISA for the presence of antibody against the novel 90 kDa
stress protein.
Results : Immunohistochemical staining of human tumor tissue blocks showed
significant immunostaining of novel 90 kDa stress protein in carcinomas such as colon
cancer, breast cancer and stomach cancer but no apparent immunostaining in sarcomas.
Coinciding with the immunohistochemical result, Western blotting and Northern blotting
analyses indicate that the expression of the novel 90 kDa stress protein was increased
in carcinomas. In addition, the antibody titer against the novel 90 kDa stress protein
was found to be elevated in the sera of cancer patients.
Conclusions : The novel 90 kDa stress protein gene expression was elevated in
carcinomas such as gastric cancer, breast cancer and colon cancer. These findings
suggest that this new stress protein can be used as a tumor marker and may function
as a chaperone in tumor growth.

Å°¿öµå

Novel 90 kDa stress protein; Carcinoma;

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