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IRRADIATION EFFECT ON THE APOPTOSIS INDUCTION IN THE HUMAN GANCER CELL LINES AND THE GINGIVAL FIBROBLAST

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Abstract

Çѱ¹¼¼Æ÷ÁÖÀºÇà¿¡¼­ ºÐ¾ç¹ÞÀº ATCC No. CCL17(KB)ÀÎ ÀÎüÀÇ ±¸°­³» À¯Ç¥ÇǾÏÁ¾¼¼Æ÷
ÁÖ, ATCC No. CCL30(RPMI 2650)ÀÎ ÀÎüÀÇ ºñÁß°Ý¿¡¼­ ¹ß»ýÇÑ ºÐÈ­µµ°¡ ³·Àº ÆíÆò»óÇǾÏ
Á¾¼¼Æ÷ÁÖ, ATCC No. CRL 2014(HGF-1)ÀÎ Ä¡Àº¼¶À¯¸ð¼¼Æ÷ÁÖ¿¡ Cs-137 µ¿¹°½ÇÇè¿ë ¹æ»ç¼±
Á¶»ç±â¸¦ »ç¿ëÇÏ¿© ¼±·®À² 241.5cGy/min·Î 2, 10. 20Gy¸¦ ´ÜÀÏÁ¶»çÇÏ¿´´Ù. ¹æ»ç¼±Á¶»ç 1ÀÏ
ÈÄ¿¡ DNA¿¡ ¼±ÅÃÀûÀ¸·Î ¿°»öµÇ´Â »ö¼ÒÀÎ propidium iodide·Î ¿°»ö ÈÄ Çü±¤Çö¹Ì°æÀ¸·Î ÇÙÀÇ
ÇüŸ¦ °üÂûÇÏ°í À¯¼¼Æ÷ºÐ¼®±â¸¦ ÀÌ¿ëÇÏ¿© ¼¼Æ÷ ºÐ¿­ ¹× ¼ºÀåÁֱ⿡ µû¸¥ DNA¿ëÀûÈ÷½ºÅä
±×·¥À» ¾ò°í »ç¸êÇÑ ¼¼Æ÷ÀÇ LDHºÐ¼®À» ÇÏ¿© ´ÙÀ½°ú °°Àº °á°ú¸¦ ¾ò¾ú´Ù.
1. ¹æ»ç¼±Á¶»ç ÈÄ¿¡ KB, RPMI 2650, HGF-1¼¼Æ÷¿¡¼­ Çü±¤Çö¹Ì°æÀ¸·Î ºÐ¿­µÈ ÇÙÀ» °üÂû
ÇÒ ¼ö ÀÖ¾ú´Ù.
2. À¯¼¼Æ÷ ºÐ¼®À¸·Î ¾ò¾îÁø DNA¿ëÀûÈ÷½ºÅä±×·¥¿¡¼­ pre-G1 ÇÇÅ©´Â ´ëÁ¶±º, 2, 10, 20Gy
Á¶»ç±º¿¡¼­ KB¼¼Æ÷¿¡¼­´Â 4.5, 55.0, 52.3, 66.6%¿´°í RPMI 2650¼¼Æ÷¿¡¼­´Â 2.7, 3.3, 31.6,
32.6% ¿´À¸¸ç HGF-1¼¼Æ÷¿¡¼­´Â 2.6, 21.8, 30.4, 40.2%·Î ³ªÅ¸³µ´Ù.
3. G1±â ¼¼Æ÷¼ö´Â KB¼¼Æ÷¿¡¼­´Â 2Gy Á¶»çÈÄ ºÎÅÍ, RPMI 2650¼¼Æ÷¿¡¼­´Â 10Gy Á¶»çÈÄ
ºÎÅÍ ±Þ°ÝÈ÷ °¨¼ÒÇÏ¿´À¸³ª HGF-1¼¼Æ÷¿¡¼­´Â Á¶»ç·®¿¡ °ü°è¾øÀÌ ´Ù¼ÒÀÇ °¨¼Ò¸¸À» º¸¿´´Ù.
4. ±«»çµÈ KB, RPMI 2650, HGF-1¼¼Æ÷ÀÇ LDHºÐ¼®½Ã À¯ÀǼº ÀÖ´Â Â÷ÀÌ´Â ¾ø¾ú´Ù.
#ÃÊ·Ï#
The radiation-induced apoptosis was studied for two human cancer cell lines (KB
cells, RPMI 2650 cells) and the human gingival fibroblast cell line (HGF-1 cells). The
single irradiation of 2, 10, 20Gy was done with 241.5 cGy/min dose rate using the
137Cs MK cell irradiator. The cells were stained with propidium iodide and
examined under the fluoro-microscope and assayed with the flow cytometry a day after
irradiation. Also, the LDH assay was done to determine the amount of necrotic cells.
The obtained results were as follows :
1. On the fluoro-microscope, many fragmented nuclei were detected in the KB, RPMI
2650, and HGF-1 cells after irradiation.
2. On the DNA content histogram obtained from the flow cytometry, the percentages
of the pre-G1 peak of the control and 2, 10 and 20Gy irradiation group were 4.5, 55.0,
52.3, and 66.6% on KB cells, 2.7, 3.3, 31.8, and 32.6% on RPMI 2650 cells and 2.8, 21.8,
30.4, and 40.2% on HGF-1 cells respectively.
3. The number of G1-stage cells was abruptly decreased after 2Gy irradiation on KB
cells and 10Gy irradiation on RPMI 2650 cells. But there was a slight decrease without
regard to irradiation dose on HGF-1 cells.
4. There was no significantly different absorbance in extracellular LDH assay along
the experimental cell lines.

Å°¿öµå

Irradiation; Apoptosis; Flow Cytometry;

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