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견우자 추출물이 MC3T3-E1의 조골세포 분화에 미치는 영향
김지현 ( Ji Hyun Kim ),성정민 ( Jeong Min Seong ),문호진 ( Ho Jin Moon ),황지민 ( Ji Min Hwang ),황경숙 ( Kyung Sook Hwang ),권용대 ( Yong Dae Kwon ),권일근 ( Il Keun Kwon ),박용덕 ( Yong Duk Park ) 한국조직공학과 재생의학회 2010 조직공학과 재생의학 Vol.7 No.2
Osteoblasts mineralize bone matrix in the process of bone formation and osteoblastic differentiation is an important step of bone formation. Some drugs have useful effects for bone formation in oriental medicine. In this study, to confirm the anti-inflammation and osteoblast differentiation effect of Pharbitidis Semen extract used in oriental medicine, we investigated cell viability, Alizarin red S assay, and Alkaline phosphatase(ALP) activity with Pharbitidis Semen extract. Also, we studied the inhibition effect of nitric oxide(NO) generation with Pharbitidis Semen extract in RAW 264.7 cell. Our results showed that Pharbitidis Semen extract had almost no cytotoxicity to the cell and it significantly enhanced the induction of ALP activity and Alizarin red S staining for osteogenesis in MC3T3-E1 cell. Also, all Pharbitidis Semen extract inhibited the LPS-induced NO generation in RAW 264.7 cell. Especially, Pharbitidis Semen ethyl acetate extract and Pharbitidis Semen butanol extract showed to be powerful inhibitors of NO generation. In conclusion, Pharbitidis Semen extract increased the ALP activity, Alizarin red S assay activity for bone formation and attenuated NO generation for inflammation. These results suggest that Pharbitidis Semen extract may act as a successful drug for osteogenic differentiation in vitro and could have the potential to be use as a therapeutic agent for bone formation.
파골세포 분화능을 세포사로 억제하는 알렌드로네이트의 효과
윤영필 ( Young Pil Yun ),김성은 ( Sung Eun Kim ),문호진 ( Ho Jin Moon ),권일근 ( Il Keun Kwon ) 한국조직공학·재생의학회 2009 조직공학과 재생의학 Vol.6 No.4
Osteoclasts regulate bone homeostasis and have a key role in bone degenerative processes. Mouse RAW264.7 macrophage cells have been shown to retain the capacity to differentiate into osteoclast-like cells in the presence of a receptor activator of nuclear factor kappa B ligand(RANKL), which is essential and sufficient to promote the maturation of osteoclasts. When treated with RANKL, RAW264.7 cells express high levels of osteoclastassociated genes such as tartrate-resistant acid phosphatase(TRAP), which has been widely used to assess bone resorption. In this study, we hypothesized that alendronate prevents RANKL-induced osteoclast-like cells, which are known to play important roles in the bone-resorptive responses. We investigated that occurred TRAP-positive area and the expression patterns of two important proteolytic enzymes, cathepsin K and Matrix Metalloproteinase- 9(MMP-9) during RANKL-induced osteoclast differentiation in RAW264.7 cells. These results showed that increased TRAP-positive staining and both cathepsin K and MMP-9 mRNA expression levels on RANKL-induced osteoclast differentiation during 4 days. Especially, alendronate increased caspase-3 expression for apoptosis with Western blot analysis. These results showed that alendronate cause apoptosis and thus osteoclast differentiation inhibit. This finding may help the understanding of the osteolytic and osteoporotic processes responsible for bone diseases, including osteoporosis and periodontal diseases.
근관확대 및 세척 주사바늘의 근관 내 위치가 치근단 3 mm 부위의 근관 세정에 미치는 영향
문호진,홍찬의 大韓齒科保存學會 2012 Restorative Dentistry & Endodontics Vol.37 No.1
Objectives: The aim of this study was to test the hypothesis, that the effectiveness of irrigation in removing smear layer in the apical third of root canal system is dependent on the depth of placement of the irrigation needle into the root canal and the enlargement size of the canal. Materials and Methods: Eighty sound human lower incisors were divided into eight groups according to the enlargement size (#25, #30, #35 and #40) and the needle penetration depth (3 mm from working length, WL-3 mm and 9 mm from working length, WL-9 mm). Each canal was enlarged to working length with Profile.06 Rotary Ni-Ti files and irrigated with 5.25% NaOCl. Then, each canal received a final irrigation with 3 mL of 3% EDTA for 4 min, followed by 5 mL of 5.25% NaOCl at different level (WL-3 mm and WL-9 mm) from working length. Each specimen was prepared for the scanning electron microscope (SEM). Photographs of the 3mm area from the apical constriction of each canal with a magnification of ×250, ×500, ×1,000, ×2,500 were taken for the final evaluation. Results: Removal of smear layer in WL-3 mm group showed a significantly different effect when the canal was enlarged to larger than #30. There was a significant difference in removing apical smear layer between the needle penetration depth of WL-3 mm and WL-9 mm. Conclusions: Removal of smear layer from the apical portion of root canals was effectively accomplished with apical instrumentation to #35/40 06 taper file and 3 mm needle penetration from the working length.
문호진 大韓齒科保存學會 2012 Restorative Dentistry & Endodontics Vol.37 No.1
This study aims to introduce the method that can relieve vibrating forces to oral environment by making an embouchure aid. Thin plastic crown forms were fabricated to prevent tooth abrasion and irritation to lip mucosa for the saxophone player. After application to the player, the most comfort form was chosen and delivered to 3 professional saxophone players. After 5 mon, the players responded to the survey. This embouchure aid did not disturb playing and gave comfort to lower lip. In general, the players preferred thin soft type and thought it caused little effect on sound. Far too little attention has been paid to the problems encountered by single-reed wind instrumentalist who suffer from tooth abrasion and irritation to lip mucosa. The embouchure aid not only prevent tooth damage but also diminish the discomfort of tight embouchure.