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이용직,김경미,정판영,조석철 한국식품과학회 2023 한국식품과학회지 Vol.55 No.6
We assessed the physiological properties of Lactobacillus acidophilus, Lactiplantibacillus plantarum, and Bifidobacterium animalis spp. lactis along with one mixed lactic acid bacteria variant, provided by NOVAREX Co. Ltd., to validate their potential as probiotics. The four types of lactic acid bacteria were evaluated for acid, bile, and enzyme resistance as well as adhesion to caco-2 cells, a strong indicator of intestinal colonization. All strains demonstrated a high survival rate and exhibited robust acid resistance. Moreover, our research unveiled a high adhesion rate, with more than 40 test strains adhering per 100 caco-2 cells, and an increased attachment ratio for the three individual lactic acid bacteria to E. coli, at 13.9, 13, and 2.08 times, respectively. These experimental findings collectively underscore the substantial promise of the three lactic acid bacteria types and the mixed lactic acid bacteria supplied by NOVAREX Co., Ltd as probiotics.
The Efficiency of RNA Interference in Bursaphelenchus xylophilus
박정은,이경윤,이세진,오완석,정판영,우태하,김창배,백융기,구현숙 한국분자세포생물학회 2008 Molecules and cells Vol.26 No.1
RNA interference (RNAi) was performed on several essential genes in the pinewood nematode Bursaphelenchus xylophilus, which causes pine wilt disease. Double-stranded RNA (dsRNA) was delivered to larvae or adult worms by soaking, electroporation, or microinjection. Soaking and electroporation of L2-L3 stage worms in solutions containing dsRNA for essential genes induced over 25% lethality after 5 days, and gene-specific phenotypes were observed. This lethality agreed with significant reductions of the targeted transcripts, as assayed by reverse-transcription coupled with real time PCR. Microinjection was the most efficient route as measured by the hatching rate of F1 embryos, which was reduced by 46%. When adult worms were soaked in dsRNA, lethality was induced in the F1 larvae, revealing the persistence of knockdown phenotypes. The penetrance of the RNAi phenotypes for essential genes was relatively low but consistent, indicating that RNAi should be useful for studying the in vivo functions of B. xylophilus gene products.