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Author ÀºÃ¢¼ö ( Chang Soo Eun ) , Çѵ¿¼ö ( Dong Soo Han ) , À̽ÂÇö ( Seung Hyun Lee ) , Àü¿ëö ( Yong Cheol Jeon ) , ¼ÕÁÖÇö ( Joo Hyun Sohn ) , ±è¿ë¼® ( Yong Seok Kim ) , ÀÌÁø ( Jin Lee )
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Title HT-29 ¼¼Æ÷ÁÖ¿¡¼­ Peroxisome Proliferator Activated Receptor ¥ã Ȱ¼ºÈ­¸¦ ÅëÇÑ ÇÁ·Î¹ÙÀÌ¿Àƽ½ºÀÇ ¿°Áõ ¾ïÁ¦ È¿°ú
Publicationinfo Korean J Gastroenterol 2007 Mar; 049(03): 139-146.
Key_word HT-29 ¼¼Æ÷ÁÖ, Lactobacillus casei, PPAR¥ã, HT-29 cells
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Abstract Background/Aims: The peroxisome proliferator-activated receptor gamma (PPAR¥ã) is a nuclear receptor highly expressed in the colon which plays an anti-inflammatory role through the inhibition of nuclear factor-¥êB (NF-¥êB) pathway. Probiotics have been shown to exert beneficial effects on inflammatory bowel diseases. However, the exact mechanism by which probiotics exert protection against intestinal inflammation is not well understood. The aims of this study were to evaluate the attenuation of inflammatory response by probiotics in intestinal epithelial cells and to study the association between probiotics and PPAR¥ã. Methods: HT-29 human epithelial cells were stimulated with LPS (20¥ìg/mL) and probiotics, Lactobacillus casei (L. casei) (10(5)-10(7) cfu/mL), or with LPS (20¥ìg/mL) alone for 24 hours. Interleukin-8 (IL-8), cyclooxygenase-2 (COX-2), toll-like receptor-4 (TLR-4) and PPAR¥ã mRNA expressions were assessed by RT-PCR. IL-8 protein secretion was measured by ELISA. HT-29 cells were transfected with tk promoter-luciferase plasmid containing a peroxisome proliferator response element (PPRE). After stimulation with L. casei or PPAR¥ã agonist (15d-PGJ2 or ciglitazone), luciferase activities were measured. Results: LPS induced IL-8, COX-2, TLR-4 mRNA expression, and IL-8 protein secretion in HT-29 cells. Treatment with LPS and L. casei in comparison with LPS stimulation alone lowered IL-8, COX-2, TLR-4 mRNA expression, and IL-8 protein secretion. L. casei increased PPAR¥ã mRNA expression in dose-dependent manner. L. casei activated PPRE in HT-29 cells transfected with PPRE3-tk-luciferase construct. Conclusions: Probiotics, L. casei, suppresses the expression of inflammatory mediators in intestinal epithelial cells. The anti-inflammatory action of L. casei might be partially related to PPAR¥ã activation. (Korean J Gastroenterol 2007;49:139-146)
ÃÊ ·Ï ¸ñÀû: ÇÁ·Î¹ÙÀÌ¿Àƽ½º´Â ÀÎü¿¡ À¯ÀÍÇÑ ÀÛ¿ëÀ» ³ªÅ¸³»´Â »ì¾Æ ÀÖ´Â ¹Ì»ý¹°·Î ÀÌ·ç¾îÁø ´Ù¾çÇÑ ÇüÅ·Î, ¿°Áõ¼º ÀåÁúȯ°ú °¨¿°¼º Àå¿°ÀÇ ÀÓ»ó½ÃÇè¿¡¼­ È¿°ú°¡ º¸°íµÇ¾ú´Ù. ±×·¯³ª ¾ÆÁ÷±îÁö ü³»ÀÇ ¸é¿ªÃ¼°è³ª ¿°Áõ¹ÝÀÀ¿¡ ´ëÇÑ ÇÁ·Î¹ÙÀÌ¿Àƽ½ºÀÇ ÀÛ¿ë±âÀüÀº Àß ¾Ë·ÁÁ® ÀÖÁö ¾Ê´Ù. PPAR ¥ã´Â ´ëÀå¿¡ °í³óµµ·Î ºÐÆ÷ÇÏ´Â ÇÙ¼ö¿ëü·Î, Àå ¿°Áõ¹ÝÀÀÀ» Á¶ÀýÇϴµ¥ Áß¿äÇÑ ¿ªÇÒÀ» ÇÑ´Ù. À̹ø ¿¬±¸¿¡¼­´Â Àå»óÇǼ¼Æ÷¿¡¼­ ÇÁ·Î¹ÙÀÌ¿Àƽ½º°¡ ¿°Áõ¹ÝÀÀÀ» ¾ïÁ¦ÇÏ´ÂÁö ¾Ë¾Æº¸°í, ÀÌ °úÁ¤¿¡¼­ peroxisome proliferator-activated receptor gamma (PPAR¥ã)¿ÍÀÇ °ü°è¸¦ ¾Ë¾Æº¸°íÀÚ ÇÏ¿´´Ù. ´ë»ó ¹× ¹æ¹ý: HT-29 ¼¼Æ÷ÁÖ¿¡ 24½Ã°£ µ¿¾È lipopolysaccharide (LPS) (20¥ìg/mL)¿Í Lactobacillus casei (L. casei) (10(5)-10(7) cfu/mL)¸¦ ÇÔ²² ÀÚ±ØÇϰųª LPS¸¸À» ´Üµ¶ ÀÚ±ØÇÏ¿´´Ù. RT-PCRÀ» ÅëÇØ interleukin-8 (IL-8), cyclooxygenase-2 (COX-2), toll-like receptor-4 (TLR-4), PPAR¥ã mRNA ¹ßÇöÀ» È®ÀÎÇÏ¿´°í, »óÃþ¾×¿¡¼­ IL-8 ´Ü¹éÀ» ELISA ¹æ¹ýÀ¸·Î ÃøÁ¤ÇÏ¿´´Ù. HT-29 ¼¼Æ÷ÁÖ¿¡ PPRE (peroxisome proliferator response element)°¡ Æ÷ÇÔµÈ PPRE3-tk-lucplasmid¸¦ transfection½ÃŲ ÈÄ L. casei ¹× PPAR¥ã ¸®°£µåÀÎ 15d-PGJ2¿Í ciglitazoneÀ¸·Î °¢°¢ ÀÚ±ØÇÏ¿© PPREÀÇ Àü»ç Ȱ¼ºÀ» ºñ±³ÇÏ¿´´Ù. °á°ú: HT-29 ¼¼Æ÷ÁÖ¸¦ LPS·Î ´Üµ¶ ÀÚ±ØÇÏ¿´À» ¶§ IL-8, COX-2, TLR-4 ¹ßÇöÀº Áõ°¡ÇÏ¿´°í, LPS¿Í L. casei¸¦ °°ÀÌ ÀÚ±ØÇÏ¿´À» ¶§´Â LPS ´Üµ¶ ÀÚ±Ø ¶§º¸´Ù IL-8, COX-2, TLR-4 ¹ßÇöÀÌ °¨¼ÒÇÏ¿´´Ù. HT-29 ¼¼Æ÷ÁÖ¿¡ LPS¿Í L. casei¸¦ ÇÔ²² ÀÚ±ØÇÏ¿´À» ¶§ L. caseiÀÇ Àڱؿ뷮ÀÌ Áõ°¡ÇÒ¼ö·Ï PPAR¥ã mRNA ¹ßÇöÀÌ Áõ°¡ÇÏ¿´´Ù. HT-29 ¼¼Æ÷ÁÖ¿¡ PPRE3-tk-lucÀ» transfectionÇÑ ÈÄ L. casei³ª 15d-PGJ2 ¶Ç´Â ciglitazoneÀ¸·Î ÀÚ±ØÇÏ¿´À» ¶§ ´ëÁ¶±º¿¡ ºñÇØ PPRE Ȱ¼ºµµ°¡ 2-2.5¹è Áõ°¡ÇÏ¿´´Ù. °á·Ð: Àå»óÇǼ¼Æ÷¿¡¼­ ÇÁ·Î¹ÙÀÌ¿Àƽ½ºÀÎ L. casei´Â ¿°Áõ¹ÝÀÀÀ» ¾ïÁ¦Çϰí, ÀÌ·¯ÇÑ Ç׿°ÁõÀÛ¿ëÀº ºÎºÐÀûÀ¸·Î´Â PPAR¥ãÀÇ È°¼ºÈ­¿Í °ü·ÃÀÌ ÀÖÀ» °ÍÀ¸·Î »ý°¢ÇÑ´Ù.
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