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비타민C가 돌연변이원에 의하여 유발되는 염색체 이상에 미치는 영향
이천복 慶星大學校 1998 論文集 Vol.19 No.1
This study was performed to investigate the effects of vitamin C on the chromosome aberrations caused by UV light and MNNG which were known for a strong mutagen. The results obtained were as follows; 1) Treatment of vitamin C for 48 hours did not affect chromosome aberrations of control group. 2) Chromosome aberrations of vitamin C-pretreated group were decreased compared with those of MNNG-treated alone group. 3) Chromosome aberrations induced by simultaneous treatment or posttreatment of vitamin C and MNNG showed similar levels to those induced by treatment of MNNG alone. 4) When vitamin C was treated before exposure to uv light chromosome aberrations were decreased. 5) Chromosome aberrations were slightly decreased in cases of post-treatment with vitamin C after exposure to uv light. These results suggest that vitamin C may not have a mutagenic effect when it was treated for 48 hours, it has an antimutagenic effect on that are induced by MNNG and uv light, and antimutagenic effect of pretreatment of vitamin C is stronger than that of simultaneous treatment or posttreatment.
염색체 이상과 자매염색분체교환에 미치는 anti-calmodulin drug의 영향
이천복 慶星大學校 1999 論文集 Vol.20 No.1
The present study was performed to elucidate the effects of TFP and W-13(anti calmodulin drug) on chromosome aberrations and sister chromatid exchanges induced by MNNG. The results obtained were as follows: 1) Both the chromosome aberrations and sister chromatid exchanges were not induced by the treatment of various concentration and times of TFP or W-13. 2) TFP and W-13 inhibited chromosome aberrations induced by MNNG regardless of the concentration and times of treatment. 3) In the groups treated with 5 M TFP or 10 M W-13 for 1 hour after treatment of MNNG, sister chromatid exchanges induced by MNNG were little effected. However, in the groups treated with more than 10 M TFP or 20 M W-13, sister chromatid exchanges induced by MNNG increased with TFP OR W-13 treatment unlike chromosome aberrations. 4) TFP or W-13 treatment for 36 hours after treatment of MNNG increased the sister chromatid exchanges induced by MNNG. The aspects of increase were proportional to the concentration of TFP and W-13 treatment. These data indicate that TFP or W-13 itself dose not induce chromosome aberrations and sister chromatid exchanges, but is concerned in chromosome aberrations and sister chromatid exchanges induced by MNNG; that is, it has the ability to decrease chromosome aberrations but to increase sister chromatid exchanges.
Colloidal Silicone Dioxide와 Aluminum Hydroxide가 간이구강위생지수와 치은지수에 미치는 영향에 관한 연구
이천복,최유진 慶熙大學校 齒科大學 1995 慶熙齒大論文集 Vol.17 No.1
This clinical study was performed for the purpose of investigating the effect of gingival index and simplified oral hygiene index of two dentifrices containing different abrasive agents. 40 dental collage students of age 2 "i-26 were divided 20 members of control group with using dentifrices containing colloidal silicone dioxide(SiO?), and others as experimental group with using dentifrices containing aluminum hydroxide(Al(OH)3) as abrasives. The gingival index and simplified oral hygiene index were analyzed before the experimental and the control dentifrices were supplied and there after 6 weeks. The results were as follows 1. Mean SOW was reduced 20.7% by control group and 31.6% by experimental group stastistical difference was observed: 2. Mean GI was reduced 49.1% by control group and 55.0% by expenmental dentifrices group, but significant difference was not observed. 3. Significant difference in GI and SOW by tooth brushing method was not observed. 4. Factual knowledge about the abrasives, brushing method and pharmacy is scarce and further research on relevant topics seems to be indicated.
Effects of MNNG on Ultraviolet Light induced sister chrometid Exchanges.
이천복 경성대학교 1985 부산수산대학 논문집 Vol.6 No.2
자매염색분체 교환에 미치는 자외선과 MNNG의 상호작용을 규명하기 위하여 CHO세포를 재료로 자외선과 MNNG를 복잡처리한 후 자매염색분체 교환율을 조사하여 다음과 같은 결론을 얻었다. (1) 자외선 단독 처리군에서의 자매염색분체 교환은 자외선의 선량 증가에 비례하여 증가하였다. (2) MNNG 단독처리군에서도 MNNG 농도증가에 비례하여 자매염색분체 교환율이 증가하였다. (3) 자외선과 MMNG를 복합처리한 군에서의 자매염색분체 교환율은 자외선과 MNNG를 단독처리한 것의 합보다 작았으며 0.01μM MNNG를 복합처리한 군의 경우 자외선 단독처리군보다 오히려 작았다. 이상의 결과는 MNNG가 자외선에 의하여 유발된 자매염색분체 교환을 방해하는 것을 보여주고 있다. The present investigation has been undertaken to determine the interaction between UV-light and MNNG, in inducing SCEs. (1) In UV-light irradiated groups, the rates of SCEs were sharply increased with increasing dose. (2) MNNG induces SCEs in dose-dependent manner. (3) Induction of SCEs exposed to UV-light and MNNG were less than that from the sum of each agent sperately and even lower that produced by single UV-light irradiation (0.01μM MNNG). The present results showed that MNNG interfered with the molecular machinery involved in UV-light induced SCE formation, and indicated that there is a considerable overlap in the mechanisms that regulate the total amount of SCEs performed for each of these agents.