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K-ras º¯ÀÌ°¡ ÀÖ´Â ÃéÀå¾Ï¼¼Æ÷ÁÖ¿¡¼­ Mitogen Activated Protein Kinase¿Í PI 3-kinase°¡ ¼¼Æ÷Áõ½Ä¿¡ ¹ÌÄ¡´Â ¿ªÇÒ Role of Mitogen Activated Protein Kinase and PI 3-kinase on Cell Proliferation in Pancreatic Cancer Cell Lines with K-ras Mutation

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1/2±èÁø/12Jin Kim 1/2ÀåÀ¯Çö/1/2ÀÌ¿ìÁø/1/2±è¿ëÅÂ/1/2À±¿ë¹ü/1/2±èÁ¤·æ/3·ùÁö°ï/12Yoo Hyun Chang/12Woo Jin Lee/12Yong Tae Kim/12Yong Bum Yoon/12Chung Yong Kim/3Ji Kon Ryu

Abstract

kabstract :
- ¿ä¾à -
¸ñÀû : ÃéÀå¾ÏÀÇ 80-90%¿¡¼­ K-ras À¯ÀüÀÚ º¯ÀÌ°¡ ¹ß°ßµÇ¾î ÃéÀå¾ÏÀÇ ¹ß»ý ¹× Áõ½Ä¿¡ ¸Å
¿ì Áß¿äÇÑ ¿ªÇÒÀ» ÇÔÀ» ÃßÃøÇÒ ¼ö ÀÖ´Ù. Ras´Â ÀÏ·ÃÀÇ ½ÅÈ£Àü´Þ°úÁ¤À» °ÅÃÄ ÇÙ³»ÀÇ À¯ÀüÀÚ
¿¡ ¿µÇâÀ» Áִµ¥, ÇöÀç±îÁö ¾Ë·ÁÁø °úÁ¤ Áß ´ëÇ¥ÀûÀÎ °ÍÀÌ mitogen activated protein
kinase (MAP kinase) ½ÅÈ£Àü´Þü°èÀÌ´Ù. ¶Ç ´Ù¸¥ ½ÅÈ£Àü´Þ°æ·Î·Î phosphatidylinositol
3-kinase (PI 3-kinase)°¡ Àִµ¥ ´ëÀå¾Ï¿¡¼­ PI 3-kinase È°¼ºµµ°¡ ³ô´Ù´Â º¸°í°¡ ÀÖÀ¸³ª
ÃéÀå¾Ï¼¼Æ÷ÁÖ¿¡¼­ÀÇ ¿ªÇÒÀº ¾Ë·ÁÁ® ÀÖÁö ¾Ê¾Æ ¾î¶² °æ·Î°¡ Áß¿äÇÑ ¿ªÇÒÀ» ÇÏ´ÂÁö ¾ÆÁ÷ Àß
¾Ë·ÁÁ® ÀÖÁö ¾Ê´Ù. º» ¿¬±¸¿¡¼­´Â K-ras º¯ÀÌ°¡ ÀÖ´Â ÃéÀå¾Ï¼¼Æ÷ÁÖ¿¡¼­ MAP kinase °æ·Î
ÀÎ mitogen activated ERK activating kinase (MEK), extracellular signal regulated
kinases (ERK) ½ÅÈ£Àü´Þü°è¿Í ¶Ç ´Ù¸¥ °æ·ÎÀÎ PI 3-kinase¸¦ ÅëÇÑ ½ÅÈ£Àü´Þü°è Áß ¾î´À
°æ·Î°¡ ¼¼Æ÷Áõ½Ä¿¡ Áß¿äÇÑ ¿ªÇÒÀ» Çϴ°¡¸¦ ¾Ë¾Æº¸°íÀÚ ÇÏ¿´´Ù. ´ë»ó ¹× ¹æ¹ý : ÃéÀå¾Ï¼¼Æ÷
Áַδ MiaPaCa2 ¿Í Panc-1À» »ç¿ëÇÏ¿´´Ù. ¼¼Æ÷Áõ½ÄÀÇ Á¤µµ´Â 3H thymidine
À» ÀÌ¿ëÇÏ¿© ÃøÁ¤ÇÏ¿´´Ù. ¿ìžÆÇ÷ûÀ̳ª epidermal growth factor (EGF)·Î ¼¼Æ÷°¡ Áõ½ÄµÇ
´ÂÁö¸¦ ¾Ë¾Æº¸¾Ò°í, MEK ¾ïÁ¦Á¦ÀÎ PD98059¿Í PI3-kinase ¾ïÁ¦Á¦ÀÎ wortmanninÀ¸·Î ¼¼Æ÷
ÀÇ Áõ½ÄÀÌ ¾ïÁ¦µÇ´Â°¡¸¦ È®ÀÎÇÏ¿´´Ù. ERKÀÇ È°¼ºµµ´Â immunoblot ¹æ¹ýÀ¸·Î ÃøÁ¤ÇÏ¿´´Ù. °á
°ú : ¿ìžÆÇ÷ûÀº ³óµµ¿¡ ºñ·ÊÇÏ¿© ÃéÀå¾Ï¼¼Æ÷ÁÖÀÇ Áõ½ÄÀ» ÃÊ·¡ÇÏ¿´À¸³ª EGF´Â ¼¼Æ÷Áõ½Ä
¿¡ ¿µÇâÀ» ¹ÌÄ¡Áö ¸øÇÏ¿´´Ù. PD98059´Â ¹«Ç÷û ¹èÁöÀÇ ¼¼Æ÷ÁÖ¿¡¼­ ¼¼Æ÷Áõ½ÄÀ» ³óµµ¿¡ ºñ·Ê
ÇÏ¿© ÀÇ¹Ì ÀÖ°Ô ¾ïÁ¦ÇÏ¿´À¸¸ç, ¿ìžÆÇ÷û¿¡ ÀÇÇØ À¯¹ßµÈ ¼¼Æ÷ÀÇ Áõ½Äµµ ¿ª½Ã ¾ïÁ¦ÇÏ¿´´Ù.
±×·¯³ª wortmanninÀº ¼¼Æ÷ÀÇ Áõ½Ä¿¡ ¿µÇâÀ» ¹ÌÄ¡Áö ¸øÇÏ¿´´Ù. EGF¿Í ¿ìžÆÇ÷ûÀº ¸ðµÎ
ERK È°¼ºµµ¸¦ Áõ°¡½ÃÄ×À¸¸ç ÀÌ´Â PD98059¿¡ ÀÇÇؼ­´Â ¾ïÁ¦µÇ¾úÀ¸³ª wortmannin¿¡ ÀÇÇؼ­
´Â ¾ïÁ¦µÇÁö ¾Ê¾Ò´Ù. °á·Ð : K-ras º¯ÀÌ°¡ ÀÖ´Â ÃéÀå¾Ï¼¼Æ÷ÁÖ¿¡¼­ PI 3-kinase°¡ ¾Æ´Ñ
MEK-ERK ½ÅÈ£Àü´Þü°è°¡ ¼¼Æ÷Áõ½Ä¿¡ Áß¿äÇÑ ¿ªÇÒÀ» ÇÑ´Ù. Áï Ras-MEK-ERK ½ÅÈ£ Àü´Þ
ü°è´Â ¼¼Æ÷ÀÇ Áõ½ÄÀ» ÃËÁø½ÃÄÑ ¹ß¾Ï±âÀü¿¡ °ü¿©ÇÑ´Ù°í ¿©°ÜÁø´Ù.

-Abstract-
Background/Aims : K-ras mutation is considered to be important for the development
and proliferation of pancreatic cancer. After activation of Ras protein, several
cytoplasmic protein kinases, such as the mitogen activated protein kinase (MAPK)
signaling cascade and PI 3-kinase, are sequentially stimulated. The aim of this study
was to examine the role of MAPK and PI 3-kinase on cellular proliferation of pancreatic
cancer cell lines with K-ras mutation. Methods : MiaPaCa-2 and Pane-1 cell lines were
cultured and stimulated with growth factors such as fetal bovine serum (FBS) and
epidermal growth factor (EGF). The cell proliferation was measured by 3H
thymidine incorporation assay. MAPK/extracellular signal regulated kinase (ERK)
activating kinase (MED) inhibitor (PD098059) or PI 3-kinase inhibitor (wortmannin) was
added in media and their effects on proliferation were examined. The activity of ERK
was measured by immunoblotting assay. Results : FBS stimulated cell proliferation
dose-dependently in both cell lines but EGF did not. PD098059 blocked
dose-dependently the cell proliferation but wortmannin did not. The activities of ERK
were increased by both FBS and EGF and blocked only by PD098059. Conclusions :
MAPK kinase signal transduction pathway from MEK to ERK plays an important role
in the stimulation of proliferation in pancreatic cancer cell lines with K-ras mutation.

Å°¿öµå

MAP kinases; MEK; PI 3-kinase; ÃéÀå¾Ï; K-ras; MAP kinase; MEK; Pancreatic cancer; PI 3-kinase;

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