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Sang-Ha Kim,Seong-Wan Cho,Seock-Yeon Hwang,Soo-Young Jeon,Young-Kwon Kim 대한의생명과학회 2010 Biomedical Science Letters Vol.16 No.3
The aim of this study was to compare the results of morphological phenotypic examination and molecular biological method, randomly amplified polymorphic DNA (RAPD) using clinical isolates from Korean patients infected with dermatophytes. A total of 44 clinical isolates have been collected by Korean Collection Medical Fungi (KCMF) and those were subjected for the RAPD analysis. The results showed that the fungal strains that have RG1 band patterns were identified as Trichophyton rubrum by the neighbour-joining analysis. Additionally, other fungal strains that have RG3 band patterns were identified as Epidermophyton floccosum and RG5 band patterns were identified as Micorsporum gypseum. Even though molecular biological method such as RAPD are not necessary, it might be useful when some strains have similar morphological characteristics or when same species has phenotypic variations. In this study, therefore, we targeted internal transcribed spacer (ITS) regions of fungal rDNA, performed RAPD and then compared with morphological phenotypic examination.
Relationship between Genetic Variants of Mitochondrial DNA and Growth Traits in Hanwoo Cattle
Jeon, G.J.,Chung, H.Y.,Choi, J.G.,Lee, M.S.,Lee, C.W.,Park, J.J.,Ha, J.M.,Lee, H.K.,Sung, H.H. Asian Australasian Association of Animal Productio 2005 Animal Bioscience Vol.18 No.3
Genetic variants of Hanwoo mtDNA in the region of cytochrome oxidase subunit I, II and III complex were detected using restriction enzymes. PCR primers were designed based on the bovine mtDNA sequence, and 6 primer sets (Mt4, Mt5, Mt6, Mt7, Mt8 and Mt9) were used. A total of 20 restriction enzymes were used, and 6 restriction enzymes, which were Hinf I, Pvu II, Rsa I, Eco RI, Bgl II, and Msp I, showed genetic polymorphisms. Significant associations between genetic variants and weight traits were observed at WT15 (p<0.05) and WT18 (p<0.01) with Pvu II for Mt9, Bgl II for Mt6 and Rsa I for Mt8 segments in the region of cytochrome oxidase subunit complex. Significant associations were also observed at Mt9-Pvu II and Mt6-Bgl II segments for WT9 (p=0.01), WT12 (p=0.02), respectively. These results suggest that genetic variants of mtDNA in the region of cytochrome oxidase subunit complex may be candidate segments for improvement of animal growth as weight traits.
Role of Glutathione Conjugation in 1-Bromobutane-induced Immunotoxicity in Mice
Sang Kyu Lee,Dong Ju Lee,Tae Won Jeon,Gyu Sub Ko,Se Hyun Yoo,Hyun Woo Ha,Mi Jeong Kang,Wonku Kang,Sang Kyum Kim,Tae Cheon Jeong 한국독성학회 2010 Toxicological Research Vol.26 No.2
Halogenated organic compounds, such as 1-bromobutane (1-BB), have been used as cleaning agents, agents for chemical syntheses or extraction solvents in workplace. In the present study, immunotoxic effects of 1-BB and its conjugation with glutathione (GSH) were investigated in female BALB/c mice. Animals were treated orally with 1-BB at 375, 750 and 1500 ㎎/㎏ in corn oil once for dose response or treated orally with 1-BB at 1500 ㎎/㎏ for 6, 12, 24 and 48 hr for time course. S-Butyl GSH was identified in spleen by liquid chromatography-electrospray ionization tandem mass spectrometry. Splenic GSH levels were significantly reduced by single treatment with 1-BB. S-Butyl GSH conjugates were detected in spleen from 6 hr after treatment. Oral 1-BB significantly suppressed the antibody response to a T-dependent antigen and the production of splenic intracellular interlukin-2 in response to Con A. Our present results suggest that 1-BB could cause immunotoxicity as well as reduction of splenic GSH content, due to the formation of GSH conjugates in mice. The present results would be useful to understand molecular toxic mechanism of low molecular weight haloalkanes and to develop biological markers for exposure to haloalkanes.