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김각균,Kim, Kack-Kyun 대한면역학회 2003 Immune Network Vol.3 No.4
The periodontal diseases are infections caused by bacteria in oral biofilm, a gelatinous mat commonly called dental plaque, which is a complex microbial community that forms and adhere to tooth surfaces. Host immune-pathogen interaction in periodontal disease appears to be a complex process, which is regulated not only by the acquired immunity to deal with ever-growing and -invading microorganisms in periodontal pockets, but also by genetic and/or environmental factors. However, our understanding of the pathogenesis in human periodontal diseases is limited by the lack of specific and sensitive tools or models to study the complex microbial challenges and their interactions with the host's immune system. Recent advances in cellular and molecular biology research have demonstrated the importance of the acquired immune system in fighting the virulent periodontal pathogens and in protecting the host from developing further devastating conditions in periodontal infections. The use of genetic knockout and immunodeficient mouse strains has shown that the acquired immune response, in particular, $CD4^+$ T-cells plays a pivotal role in controlling the ongoing infection, the immune/inflammatory responses, and the subsequent host's tissue destruction.
한국아동(韓國兒童)의 치아우식경험과 치면상(齒面上) Streptococcus mutans 분포(分布)에 대(對)한 연구(硏究)
김각균,최선진,임창윤,장우현,Kim, Kack-Kyun,Choe, Son-Jin,Lim, Chang-Yoon,Chang, Woo-Hyun 대한미생물학회 1983 大韓微生物學會誌 Vol.18 No.1
Various investigations have been carried out to elucidate the causative relationship between specific oral bacterial species and dental caries since it was first demonstrated that selected streptococoal species produced dental caries in germfree rats when fed a high-sucrose diet. Now, S. mutans is considered to play an important role in the development of dental caries in animals and humans, and only a limited number of species of bacteria other than S. mutans are occasionally found to be cariogenic in experimental animals. In this regard, association of the number of S. mutans in approximal plaque with caries experience (DMFT) was studied from 137 Korean school children($10{\sim}11$ year old). Biotypes of the collected strains of S. mutans were determined, and their relationship with caries status was also examined. The following results were emerged from the study. 1. S. mutans was detected in the plaques of all children. 2. Statistically significant positive correlation(r=0.445, p<0.001) was found between the caries experience(DMFT) and the number of S. mutans in approximal plaques. 3. The number of S. mutans were significantly higher(p<0.001) in plaques removed from carious surface than from sound surface. 4. The most frequent biotype was biotype I(78.8%), followed by IV(33.1%) and V(09.5%). Biotype II was isolated in the plaque of two children(1.7%) only. 5. There was no apparent relation of specific biotypes to carious status.
Streptococcus mutans혈청형 항원 추출에 관한 연구
김각균 대한구강생물학회 1986 International Journal of Oral Biology Vol.10 No.1
Four extraction methods were compared for their efficiency in extracting serotype antigen from streptococcus mutans strains AHT (a), KPSK2 (c), B13 (d), LM7 (e) OMZ175 (f), and OMZ65 (g). Also, antisera against six strains of S. mutans were treated by adsorbing antipolygly-cerophosphate antibody to Streptococcus pyogenes cells and observed for their effect. The results were as follows: 1. Extracts by Rantz and Randall autoclave method react with antisera to give most numerous precipitin band and cross reaction. 2. Extracts by formamide method gave least cross reaction with antiserum. 3. S. pyogenes adsorption procedure removes much of the cross reaction by removing anti-PGP antibody.
Streptococcus mutans가 생산하는 세포외 당대사 효소의 Polyacrylamide Gel 전기영동법에 의한 연구
김각균,정동균 대한구강생물학회 1979 International Journal of Oral Biology Vol.3 No.1
The glucan-synthesizing system of Streptococcus mutans B-13 was studied in this experiment. S. mutans B-13 was cultured in chemically defined medium and the proteins elaborated by the organisms were isolated and subjected to polyacrylamide gel electrophoresis. Patterns of protein components and the glucosyltransferases were then delineated. The results were as follows : 1) The glucosyltransferases of S. mutans B-13 were resolved into two major fractions. One fraction synthesized water-soluble glucans and the other made water-insoluble glucans. 2) Soluble glucans were synthesized by two protein bands whose electrophoretic mobility was relatively higher than insoluble glucan synthesizing bands. 3) Insoluble glucans were produced by three groups of protein bands, each group comprising 2 to 3 protein bands.