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Toluene diisocyanate (TDI)¿¡ ÀÇÇÑ Ãµ½Ä ȯÀÚ¿¡¼­ transforming growth factor¥â1 (TGF¥â1)°ú TGF¥â receptor ¥± (R¥±)ÀÇ ¹ßÇö Á¤µµ¿Í Áö¼ÓÀûÀΠõ½Ä Áõ»ó°úÀÇ °ü°è Expression of transforming growth factor ¥â1 (TGF¥â1) and TGF¥â receptor ¥± (R¥±) in airway mucosa of toluene diisocyanate (TDI)-induced asthma: relationships with persistent asthmatic symptoms

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À̼ö°É/Soo-Keol Lee À̼±¹Î/ÇÔ±â¹é/ÀÓÇöÀÌ/±è¼±½Å/³²µ¿È£/¹ÚÇؽÉ/Sun-Min Lee/Ki-Baik Hahm/Hyun-Ee Yim/Sun-Sin Kim/Dong-Ho Nahm/Hae-Sim Park

Abstract

¸ñÀû: TDI-õ½Ä ȯÀÚÀÇ ¾à 50% À̻󿡼­ ÀÛ¾÷Àå¿¡¼­ÀÇ ¿ÏÀü ȸÇÇ ¹× Áö¼ÓÀûÀÎ Ç× ¿°ÁõÁ¦ÀÇ Åõ¿©¿¡µµ ºÒ±¸ÇÏ°í Áö¼ÓÀûÀΠõ½Ä Áõ»óÀ» È£¼ÒÇÑ´Ù. ÀÌ¿Í °°Àº TDI-õ½Ä ȯÀÚÀÇ ºÒ·®ÇÑ ¿¹ÈÄÀÇ º´Å»ý¸®¿¡ ´ëÇؼ­´Â È®½ÇÈ÷ ¹àÇôÁöÁö ¾Ê¾Ò´Ù. ÀúÀÚµéÀº Ãֱ٠õ½Ä
ȯÀÚÀÇ
±âµµ °³Çü¿¡ À־ Áß¿äÇÑ ¹°Áú·Î Àνĵǰí ÀÖ´Â TGF ¥â1°ú TGF ¥â Á¦ 2Çü ¼ö¿ëü°¡ TDI-õ½Ä ȯÀÚÀÇ º´Å»ý¸®¿¡ ¾î¶°ÇÑ ¿ªÇÒÀ» ÇÏ´ÂÁö ±Ô¸íÇϱâ À§Çؼ­ º» ¿¬±¸¸¦ ½ÃÇàÇÏ¿´´Ù. ¹æ¹ý: 22¸íÀÇ TDI-õ½Ä ȯÀÚ (Á¦ ¥°±º- ÃÊÁø ȯÀÚ 10¸í, Á¦ ¥±±º: Àû¾îµµ 4³â
ÀÌ»óÀÇ
õ½Ä Áõ»óÀ» È£¼ÒÇϴ ȯÀÚ 12¸í)¿Í ´ëÁ¶±ºÀ¸·Î ÆóÁ¾¾çÀ¸·Î Æó ÀýÁ¦¼úÀ» ½ÃÇà¹ÞÀº 8¸íÀÇ È¯ÀÚ¸¦ ´ë»óÀ¸·Î, À̵é ȯÀÚÀÇ ±â°üÁö Á¡¸·¿¡¼­ TGF ¥â1°ú TGF ¥â Á¦ 2Çü ¼ö¿ëü¿¡ ´ëÇÑ ´ÜŬ·Ð Ç×ü¸¦ ÀÌ¿ëÇÑ ¸é¿ª Á¶Á÷ÇÐÀû ¿°»öÀ» ½ÃÇàÇÏ¿´´Ù. TDI-ÀÎÇ÷û ¾ËºÎ¹Î °áÇÕü¿¡
´ëÇÑ
Ç÷û ƯÀÌ IgG ¹× IgE Ç×ü¸¦ ¸é¿ªÈ¿¼Ò¹ý (ELISA)À¸·Î ÃøÁ¤ÇÏ¿´´Ù. TGF ¥â1°ú TGF ¥â Á¦ 2Çü ¼ö¿ëüÀÇ ¹ßÇöÀº ±â°üÁö Á¡¸·ÀÇ ³× ºÎºÐ, »óÇÇ (epthelium, EP), Ç÷°ü ³»ÇÇ (vascular endothelium, VE), ÆòÈ°±Ù (smooth muscel, SM) ¹× Á¡¾×¼± (mucous glands,
MG)µî¿¡¼­
Á¶»çÇÏ¿´°í, ¹ß»ö Á¤µµ´Â 0ºÎÅÍ 3´Ü°è±îÁö Ç¥½ÃÇÏ¿´´Ù. Subepithelial basement membrane (SBM)°ú submucosal extracellular matrix (SECM)ÀÇ µÎ²²¸¦ image analyzer·Î ÃøÁ¤ÇÏ¿´´Ù. °á°ú: ȯÀÚ±º ¾ç ±º »çÀÌÀÇ TGF ¥â1 ¹ßÇöÀÇ Á¤µµ´Â »óÇÇ, Ç÷°ü ³»ÇÇ ¹×
ÆòÈ°±Ù ¼¼
ºÎÀ§¿¡¼­ Á¦ ¥±±ºÀÌ Á¦ ¥°±ºº¸´Ù ÀÇ¹Ì ÀÖ°Ô ³ôÀº ¹ßÇö ¾ç»óÀ» º¸¿´°í (°¢ p£¼0.05), TGF ¥â Á¦ 2Çü ¼ö¿ëüÀÇ ¹ßÇöÀº ÆòÈ°±Ù ºÎÀ§¿¡¼­ Á¦ ¥±±ºÀÌ Á¦ ¥°±º¿¡ ºñÇØ À¯ÀÇÇÏ°Ô ³ô¾Ò´Ù (p£¼0.05). SBM°ú SECMÀÇ µÎ²²´Â TDI-õ½Ä ȯÀÚ±ºÀÌ ´ëÁ¶±º¿¡ ºñÇؼ­ ÀÇ¹Ì ÀÖ°Ô ³ôÀº
ÃøÁ¤Ä¡¸¦ º¸¿´À¸¸ç (°¢ p£¼0.05), ȯÀÚ±º ¾ç±º »çÀÌ¿¡´Â À¯ÀÇÇÑ Â÷ÀÌ°¡ ¾ø¾ú´Ù (°¢ p£¼0.05). »óÇÇ, Ç÷°ü ³»ÇÇ ¹× ÆòÈ°±Ù ¼¼ ºÎºÐ¿¡¼­ °üÂûµÇ´Â TGF ¥â1 ¹ßÇö Á¤µµ´Â TDI-õ½Ä Áø´Ü ÈÄ À¯º´±â°£°ú À¯ÀÇÇÑ ¾çÀÇ »ó°ü°ü°è¸¦ º¸¿´À¸¸ç (°¢ p£¼0.05), TGF ¥â Á¦ 2Çü
¼ö¿ëüÀÇ
¹ßÇö Á¤µµ¿Í´Â À¯ÀÇÇÑ °ü°è°¡ ¾ø¾ú´Ù (p£¼0.05). TDI-ÀÎÇ÷û ¾ËºÎ¹Î °áÇÕü¿¡ ´ëÇÑ Ç÷û ƯÀÌ IgG Ç×ü°¡ ¾ç¼ºÀÎ ±ºÀÌ À½¼º±º¿¡ ºñÇؼ­ TGF ¥â1 ¹ßÇö Á¤µµ°¡ »óÇÇ, Ç÷°ü ³»ÇÇ ¹× ÆòÈ°±Ù ºÎÀ§¿¡¼­ À¯ÀÇÇÏ°Ô ³ô¾Ò´Ù (°¢ p£¼0.05). °á·Ð: ÀÌ·¯ÇÑ °á°úµéÀº
TDI-õ½Ä
ȯÀڵ鿡¼­ TGF ¥â1Àº ¸¸¼ºÀû õ½Ä Áõ»óÀÇ º´Å »ý¸®¿¡ ±â¿©ÇÒ °¡´É¼ºÀ» ½Ã»çÇÏ´Â ¼Ò°ßÀ¸·Î »ý°¢µÈ´Ù.

Background: The underlying mechanism to explain the poor prognosis of TDI-induced asthma is unknown. We performed this study to evaluate the role of TGF ¥â1 and its receptor, TGF ¥â receptor ¥± (R¥±) in TDI-induced asthma. Methods:
We
applied immunohistochemistry with monoclonal antibodies to TGF ¥â1 and R¥± in bronchial mucosa from 22 subjects with TDI-induced asthma (group ¥°: 10 newly diagnosed, group ¥±: 12 subjects with persistent asthma symptoms for more than 4 years
after
diagnosis) and 8 non-asthmatics undergoing pneumonectomy from lung tumor. The expression was analyzed in 4 areas of bronchial tissue-epithelium (EP), vascular endothelium (VE), smooth muscle (SM), mucous gland (MG). The grade of intensity was
presented
from 0 to 3. Subepithelial basement memberane (SBM) and submucosal extracellular matrix (SECM) thickness were measured using an image analyzer. Serum specific IgE and IgG antibody levels to TDI- human serum albumin (HSA) conjugate were detected
by
ELISA. Results: Grade of TGF ¥â1 expression was significantly higher in EP, VE and SM in group ¥± than those of group ¥° of TDI-induced asthma (p£¼0.05 respectively), with significant difference in SM only in R¥± expression. SBM and SECM
thickness of TDI-induced asthma were significantly higher than those of non-asthmatics (p£¼0.05, respectively), while there was no significant difference between group ¥° and ¥± (p£¾0.05). Significant correlations were noted between asthma
duration
after diagonsis and intensity of TGF ¥â1 expression in EP, VE and SM (p£¼0.05, respectively), with no significant correlations with R¥± expression (p£¼0.05). TGF 1 expression was significantly higher in EP, VE and SM in subjects with specific IgG
antibody to TDI-HSA than those without it (p£¾0.05). Conclusion: These findings suggest that TGF ¥â1 may contribute to develop persistent asthma symptoms in TDI-induced asthma.

Å°¿öµå

TDI induced asthma; TGF-beta-1; TGF receptor ¥±; Asthma symptom;

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