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±Þ¼º°ñ¼ö¼º¹éÇ÷º´¼¼Æ÷¿¡¼­ Transforming Growth Factor-¥â1(TGF-¥â1)À» ÅëÇÑ Vitamin D3ÀÇ ¼¼Æ÷Áõ½Ä¾ïÁ¦ È¿°ú¿¡ °üÇÑ ¿¬±¸ Study on the Growth Suppression Effect of Vitamin D3 Mediated by Transforming Growth Factor-¥â1(TGF-¥â1) in Acute Myelogenous Leukemic Cell

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Abstract

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Vitamin D3¸¦ ±Þ¼º°ñ¼ö¼º ¹éÇ÷º´ ¼¼Æ÷ÁÖ¿¡ Åõ¿©ÇÏ¸é ¼¼Æ÷ÁÖÀÇ Á¾·ù¿¡ µû¶ó
¼ºÀå ¹× ºÐÈ­°¡ ´Ù¾çÇÑ ¾ç»óÀ¸·Î Á¶ÀýµÈ´Ù. ºñ±³Àû ¼º¼÷ÇÑ ¼¼Æ÷ÁÖÀÎ HL-60, HEL, U937¼¼
Æ÷ÁÖ´Â ¼ºÀåÀÌ ¾ïÁ¦µÇ°í ºÐÈ­°¡ À¯µµµÇ´Âµ¥ ¹ÝÇØ KG-1 µî ¹Ì¼º¼÷ ¼¼Æ÷ÁÖ´Â ¿ÀÈ÷·Á ±× ¼º
ÀåÀÌ ÃËÁøµÇ´Â ¹ÝÀÀÀ» º¸ÀδÙ. ¾ÆÁ÷ vitamin D3°¡ ¹éÇ÷º´¼¼Æ÷ÁÖÀÇ ¼ºÀåÀ» ¾ï
Á¦ÇÏ°í ºÐÈ­¸¦ À¯µµÇÏ´Â ±âÀüÀº ¾Ë·ÁÁ® ÀÖÁö ¾ÊÀ¸³ª TGF-¥â1ÀÌ °ü¿©ÇÒ °ÍÀ̶ó´Â ¿©·¯ º¸
°í°¡ ÀÖ´Ù. HL-60¼¼Æ÷ÁÖÀÇ retinoic acid¿¡ ÀÇÇÑ ¼ºÀå¾ïÁ¦¿¡ transforming growth factor-¥â
1(ÀÌÇÏ TGF-¥â1·Î ¾àÇÔ)ÀÌ °ü¿©Çϸç neuroblastoma ¼¼Æ÷ÁÖ¿¡ retinoic acid¸¦ Åõ¿©ÇÏ¿´À»
¶§ ¼ºÀå¾ïÁ¦°¡ µÇ´Â °ÍÀº TGF-¥â1 ¹× ±× ¼ö¿ëüÀÇ ¹ßÇöÀ» À¯µµÇϱ⠶§¹®À̶ó´Â º¸°íµµ ÀÖ
¾ú´Ù. ¶ÇÇÑ ¾Ç¼º¸²ÇÁÁ¾¼¼Æ÷ÁÖ¿¡¼­ retinoic acid¿¡ ÀÇÇØ TGF-¥â1ÀÇ ºÐºñ¿Í TGF-¥â Á¦ 2Çü
¼ö¿ëüÀÇ ¹ßÇöÀÌ Áõ°¡µÇ¸ç ÀÌ°ÍÀÌ TGF-¥â1ÀÇ ÁßÈ­Ç×ü¿¡ ÀÇÇØ ¿ªÀüµÇ´Â °ÍÀ¸·Î º¸¾Æ ¼ºÀå
¾ïÁ¦¿Í °í»ç(apoptosis)¿¡ TGF-¥â1ÀÌ °ü¿©ÇÒ °ÍÀ̶ó°í ÇÏ¿´´Ù. ÀÌ·¯ÇÑ º¸°í´Â retinoic acid
¿Í À¯»çÇÑ ¼ºÀå¾ïÁ¦ ¹× ºÐÈ­À¯µµ ÀÛ¿ëÀÌ ÀÖ´Â vitamin D3¿¡µµ TGF-¥â1°¡ °ü
¿©ÇÒ °ÍÀ̶ó´Â Á¡À» ½Ã»çÇÑ´Ù. KoliµîÀº »óÇǼ¼Æ÷ÁÖ¿Í À¯¾Ï¼¼Æ÷ÁÖ ½ÇÇè¿¡¼­ vitamin
D3¸¦ Åõ¿©ÇÏ¿´À» ¶§ ½Ã°£ ¹× ¿ë·®¿¡ ºñ·ÊÇÏ¿© TGF-¥â1 mRNA°¡ Áõ°¡ÇÏ´Â
°ÍÀ¸·Î º¸¾Æ vitamin D3ÀÇ ¼ºÀå¾ïÁ¦ È¿°ú°¡ TGF-¥â1À» ÅëÇÏ¿© ÀϾ´Ù°í
º¸°íÇÏ¿´´Ù. ¶ÇÇÑ Àü´Ü±¸ ¹éÇ÷º´¼¼Æ÷ÁÖÀÎ THP-1°ú U937¼¼Æ÷ÁÖ¿¡ TGF-¥â1À» Åõ¿©ÇÏ¸é ¼º
ÀåÀÌ ¾ïÁ¦µÇ°í ºÐÈ­°¡ ÀϾ´Ù´Â Á¡ÀÌ º¸°íµÇ¾ú´Ù.

Purpose: Vitamin D3 was shown to arrest the growth of acute
myelogenous leukemic cells and transforming growth factor-¥â1 (TGF-¥â1) was reported
to be involved in the mechanism of vitamin D3. We studied the growth
inhibitory effect of 1,25(OH)2-vitamin D3(C) and its analogue
(EB 1089) in leukemic cell lines and the changes in the secretion or the activation of
TGF-¥â1 in the supernatant and the status of TGF-¥â type II receptor.
Materials and Methods: Growth inhibition by vitamin D3 and TGF-¥â1
in 5 leukemic cell lines (HEL, HL-60, U937, KG-1, K562) were assessed with clonogenic
and [3H]thymidine assay respectively. TGF-¥â type II receptor status was
examined by Southern and Northern blotting. The concentrations of TGF-¥â1 in the
supernatant were quantitated by enzyme immunoassay.
Results: The growth of HEL, HL-60, U937 were inhibited in a dose-dependent fashion
by both C and EB1089, more markedly by the latter. Anti-TGF-¥â neutralizing antibody
partially reversed the growth inhibition. TGF-¥â1 markedly inhibited the growth of HEL,
U937, KG-1, SNU-16 dose dependently while HL-60 and K562 showed no growth
inhibition. HEL secreted latent TGF-¥â1 and HL-60 activated latent TGF-¥â1 or
secreted active TGF-¥â1 irrespective of the treatment with vitamin D3. In
U937, vitamin D3 increased the concentration of both active and latent
TGF-¥â1. Deletion or abnormal expression of TGF-¥â type II receptor gene was not
found in the 5 cell lines examined.
Conclusion: Vitamin D3 has various pattern of growth inhibition in acute
myelogenous leukemia and inhibits the growth of some cell lines by secretion or
activation of TGF-¥â1. Abnormality of TGF-¥â type II receptor DNA or mRNA seems
to be rare.

Å°¿öµå

Vitamin D3; EB1089; Acute myelogenous leukemia; TGF-¥â1;

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