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µÎ°æºÎÆíÆò»óÇÇ¾Ï ¼¼Æ÷ÁÖÀÇ Spheroid ¹× Raft ¹è¾ç¿¡¼­ IFN-¥ãÀÇ È¿°ú Effects of IFN-¥ã on Spheroid and Raft Culture of Squamous Cell Carcinoma of the Head and Neck

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Abstract

¼­·Ð
Multicellular tumor spheroids(MTS)´Â Á¾¾ç¼¼Æ÷°¡ 3Â÷¿øÀûÀ¸·Î ¹¶Ãļ­ ±¸ÇüÀÇ ¼¼Æ÷ µ¢¾î
¸®¸¦ Çü¼ºÇÑ °ÍÀ¸·Î ÇüÅÂÇÐÀû, ±â´ÉÀûÀÎ ¸é¿¡¼­ »ýü³»ÀÇ ¹«Ç÷°ü¼º ¹Ì¼¼ÀüÀÌ(microscopic
avascular metastasis)¿Í ºñ½ÁÇÑ »ý¹°ÇÐÀû Á¶°ÇÀ» Á¦°øÇϸç, ÀÌ ¸ðµ¨¿¡¼­´Â Á¾¾ç¼¼Æ÷µéÀÌ ¹¶
ÃÄ ÀÚ¶ó¹Ç·Î ´ÜÃþ¹è¾ç¿¡¼­º¸´Ù ´õ ¸¹Àº ¼¼Æ÷°£ÀÇ Á¢ÃËÀÌ ÀÖ°Ô µÇ°í ¼¼Æ÷»çÀÌ¿¡ »ýü³»¿Í ºñ
½ÁÇÑ ¼¼Æ÷¿Ü±âÁú(extracellular matrix)ÀÌ Çü¼ºµÈ´Ù. µû¶ó¼­ MTS´Â ¼¼Æ÷-¼¼Æ÷°ü°è¿¡ ´ëÇÑ
¿¬±¸¿¡¼­ Áß¿äÇÑ ¸ðµ¨·Î »ç¿ëµÉ ¼ö ÀÖÀ¸¸ç, MTSÀÇ Á߽ɺο¡´Â Àú»ê¼Ò»óÅÂÀÇ ¼¼Æ÷±ºÀÌ Á¸
ÀçÇÏ°í, ¼¼Æ÷ÁÖ±â(cell cycle time)°¡ °¢ ¼¼Æ÷¸¶´Ù ´Ù¾çÇϹǷΠġ·á¹æ»ç¼±ÇÐÀû ¿¬±¸ ¶Ç´Â È­
Çпä¹ý ¿¬±¸¿¡µµ ³Î¸® ¾²ÀÏ ¼ö ÀÖ´Ù.
Raft ¹è¾ç¿¡¼­´Â ¼¼Æ÷°¡ ¼¶À¯¸ð¼¼Æ÷°¡ ¼¯¿©ÀÖ´Â ²Ã¶ó°ÕÁ©(fibroblast-containing collagen
gel)À§ÀÇ °ø±â-¾×ü °æ°è¸é(air-liquid interface)¿¡¼­ °ø±â¿¡ ³ëÃâµÈ ä ¼ºÀåÇÏ¿© 3Â÷¿øÀûÀ¸
·Î ÃþÀ» ÀÌ·ç¸ç ÁßøµÇ¾î ÀÚ¶õ´Ù. ¹è¾çÀ¸·Î ¾ò¾îÁø Á¶Á÷Àº ÇüÅÂÇÐÀûÀ¸·Î ¿ø¹ßºÎÀ§ÀÇ Á¶Á÷°ú
ºñ½ÁÇÑ ÇüÅ·ΠºÐÈ­±â¹Ç·Î, raft ¹è¾ç ¿ª½Ã »ýü Á¶°Ç¿¡ º¸´Ù °¡±î¿î ¼¼Æ÷¹è¾ç ¸ðµ¨À̶ó°í
ÇÒ ¼ö ÀÖ´Ù. ´õ¿íÀÌ ÀÌ°ÍÀº ¼¼Æ÷°¡ °ø±â¿¡ ³ëÃâµÈ´Ù´Â Á¡¿¡¼­ ´ëºÎºÐÀÇ µÎ°æºÎÁ¾¾çÀÌ ¹ß»ý
Çϴ ȯ°æ°ú ºñ½ÁÇÑ Á¶°ÇÀ» °¡Áö¹Ç·Î ƯÈ÷ µÎ°æºÎ ¿µ¿ª Á¾¾çÀÇ Æ¯¼ºÀ» ¿¬±¸Çϴµ¥ À¯¿ëÇÑ
¸ðµ¨ÀÌ µÉ ¼ö ÀÖ´Ù.
º» ¿¬±¸¿¡¼­´Â µÎ°æºÎÆíÆò»óÇǾÏ(squamous cell carcinoma of the head and neck;
SCCHN) ¼¼Æ÷ÁÖ¸¦ ´ë»óÀ¸·Î ÀÌ·¯ÇÑ 3Â÷¿øÀûÀÎ ¼¼Æ÷¹è¾çÀ» ½ÃµµÇÏ°í, SCCHNÀÇ ¼ºÀå¿¡ ´ë
ÇØ Å« »ý¹°ÇÐÀû È¿°ú¸¦ °¡Áø °ÍÀ¸·Î ¾Ë·ÁÁø interferon-¥ã(IFN-¥ã)ÀÇ È¿°ú¸¦ ¿¬±¸ÇØ º¸°íÀÚ
ÇÏ¿´´Ù. IFN-¥ã´Â ÀÚ¿¬»ìÇؼ¼Æ÷³ª T ¸²ÇÁ±¸¿¡¼­ »ý¼ºµÇ¾î ¼¼Æ÷ÀÇ ¼ºÀå°ú Áõ½ÄÀ» ¾ïÁ¦ÇÏ°Å
³ª, ºÐÈ­ÀÇ À¯µµ ¶Ç´Â ¾ïÁ¦¿¡ °ü¿©ÇÑ´Ù. ¸é¿ª°è¿¡ ´ëÇؼ­´Â °Å½Ä¼¼Æ÷³ª ÀÚ¿¬»ìÇؼ¼Æ÷ÀÇ È°¼º
È­ µîÀÇ ¿ªÇÒ°ú ÇÔ²², ÁÖÁ¶Á÷ÀûÇÕ¼ºº¹ÇÕü(major histocompatibility complex; MHC) ¥°, ¥±
±ºÀ̳ª Á¾¾çƯÀÌÇ׿øÀÇ ¹ßÇöÀ» Áõ°¡½ÃÅ´À¸·Î½á Á¾¾ç¼¼Æ÷ÀÇ ¸é¿ªÇÐÀû Á¶Àý±â´ÉÀ» °¡Áö°í ÀÖ
´Â °ÍÀ¸·Î ¾Ë·ÁÁ® ÀÖ´Ù. ¶ÇÇÑ Á¾¾ç¼¼Æ÷°£ÀÇ »óÈ£ÀÛ¿ë¿¡ ¸Å¿ì Áß¿äÇÑ ¿ªÇÒÀ» ÇÒ °ÍÀ¸·Î »ý°¢
µÇ´Â intercellular adhesion molecule-1 (ICAM-1), integrin °°Àº À¯ÂøºÐÀÚÀÇ Ç¥ÇöÀ» º¯È­½Ã
ų ¼ö ÀÖ´Ù. º» ¿¬±¸¿¡¼­´Â MHC-¥°, ¥±, ICAM-1, integrin ¥á6ÀÇ ¹ßÇö¿¡ ¹ÌÄ¡´Â IFN-¥ãÀÇ
È¿°ú¸¦ SCCHN¼¼Æ÷ÁÖÀÇ 3Â÷¿øÀû ¼¼Æ÷¹è¾ç ¸ðµ¨¿¡¼­ ±Ô¸íÇØ º¸°íÀÚ ÇÏ¿´´Ù.

Purpose : To establish new in vitro model systems that better reflect in vivo
condition, multicellular tumor spheroids(MTS) and raft culture were developed using cell
lines of squamous cell carcinoma(SCCHN) of the head and neck. In these 3-dimensional
systems, the expression of cell surface molecules which are important for modulation of
physiology of tumor cells were studied with or without the treatment of interferon(IFN)-
¥ã.
Materials and Methods : Four SCCHN cell lines were used for MTS and raft culture.
The effects of interferon-¥ã on SCCHN cells were examined by immunohistochemistry.
Results : All cell lines formed MTS, but only Tu-138 showed a good stratification at
the air-liquid interface in the raft culture system. Immunohistochemical studies of MTS
using monoclonal antibodies revealed a strong staining for MHC class 1, no staining for
MHC-DR, a weak patch expression of ICAM-1 and a central strong staining for
integrin ¥á6. Staining patterns were similar for the rad cultures except integrin ¥á
6(intense full-thickness positivity), In both systems, IFN-¥ã enhanced the expression of
MHC-DR and ICAM-1. No significant change was found in the expression of MHC
class I and integrin ¥á6.
Conclusions : MTS and raft culture system were established successfully from the
SCCHN cell lines. IFN-¥ã can modulate the surface molecules of tumor cells in the
3-dimensional culture systems.

Multicellular tumor spheroid; Raft culture; Interferon-¥ã; Squamous cell carcinoma of the head and neck;

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