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Effects of various root canal sealers on tooth discoloration and internal bleaching
Yi-San Kim(김이산),Sung-Hyeon Choi(최성현),Kyeong-Eun Youn(윤경은),Ji-Hyun Jang(장지현),Hoon-Sang Chang(장훈상),Yun-Chan Hwang(황윤찬),In-Nam Hwang(황인남),Won-Mann Oh(오원만),Bin-Na Lee(이빈나) 대한치과재료학회 2019 대한치과재료학회지 Vol.46 No.1
There are several causes of tooth discoloration following root canal treatment. In this study, we evaluated the effects of sealers on tooth discoloration and internal bleaching. Twenty-four teeth were divided into 4 groups: control group, AH plus, Endosequece BC, and MTA fillapex group. Root canal filling was performed using each sealer conventionally and non-vital bleaching was performed with sodium perborate. The L, a, and b values were measured using Vita easyshade. Tooth discoloration after root canal treatment occurs irrespective of the type of sealers and may cause discoloration with only gutta-percha cone. The effect of non-vital bleaching following the use of calcium silicate-based sealers such as Endosequece BC and MTA fillapex was higher than that of AH plus. Therefore, it needs careful use of sealers in endodontics and calcium silicate-based sealers have advantages of bleaching in case of discolored tooth.
인진(茵陳)분획물이 간세포활성, 세포주기 및 Fas-mediated Apoptosis에 미치는 영향
김영철,이장훈,우홍정,이종훈,Kim, Young-Chul,Lee, Jang-Hoon,Woo, Hong-Jung,Yi, Jong-Hoon 대한한방내과학회 2000 大韓韓方內科學會誌 Vol.21 No.3
Objective : This study was carried out to examine the effect of five fractions of an aqueous extract from Artemisia capillaris $T_{HUNB}$. Methods : The queous extract from Artemisia capillaris $T_{HUNB}$. was fractionized into 5 kinds of material. We observed the effect of each fractions on etoposide-induced apoptosis, cell viability, cell cycle progression and mRNA expression of apoptosis-related genes in human hepatocyte cell line HepG2. Results and Conclusions : The data shows that butanol fraction of Artemisia capillaris $T_{HUNB}$. has no relation with cell cycle, however, it inhibits apoptosis significantly and the action may be due to the suppression of Fas and Sax genes and activation of Bcl-2 gene.
인진청간탕(茵蔯淸肝湯)이 HepG2 cell의 인터페론 신호전달계에 미치는 영향
이종훈,김영철,이장훈,우홍정,Yi, Jong-Hoon,Kim, Young-Chul,Lee, Jang-Hoon,Woo, Hong-Jung 대한한방내과학회 2005 大韓韓方內科學會誌 Vol.26 No.1
Objectives/Methods : To analyze the effect of Injinchunggantang(IJCGT) to Interferon-${\alpha}/{\beta}$ signal transmission system in HepG2 cells, HepG2 Cell were treated with IJCGT. Also, revelation of MxA, 2'5'-OAS mRNA leaded by Interferon-${\alpha}/{\beta}$ and revelation and activation of Jak1, TYK1, and STAT 1, all main signal transmission factors, were analyzed. Results : The analysis resulted in the following 1. With interferon ${\alpha}/{\beta}$ there was no affect cell propagation of Hep G2 cells. With IJCGT alone, cell propagation of HepG2 was promoted, and cell propagation control function was recovered. 2. With interferon ${\alpha}/{\beta}$ cell death was unaffected. With IJCGT apoptosis of HepG2 cell was restrained, and the cell's reaction to interferon was unaffected. 3. With interferon ${\alpha}/{\beta}$ treatment mRNA revelation of MxA and 2'5'-OAS was induced. When HepG2 cells were injected with IJCGT without interferon ${\alpha}/{\beta}$ treatment, mRNA revelation of MxA and 2'5'-OAS increased in proportion to the treatment density. With pre-treatment of IJCGT, leaded with interferon ${\alpha}/{\beta}$, promoted revelation of MxA, 2'5' -OAS mRNA. 4. Though mRNA revelation of lakl, TYK1 and STAT1 was unaffected with IJCGT, activation of STAT1 was promoted with an increase of phosphorylation of STAT1 protein. With pre-treatment of IJCGT, Jak1, TYK2, STAT1 phosphorylation, leaded with interferon, strengthened. 5. TNF-a, IL-1b and LPS present, revelation of MxA and 2'5'-OAS mRNA leaded by interferon was restrained when HepG2 cells were treated with IJCGT, and the interferon signal transmission system restraint action leaded by inflammatory cytokines was moderated. Conclusion : These results support a role for IJGCT in promotion of anti-virus action through maintainance of the liver's sensibility toward interferon. A clinical study of an interferon treated patient treated also with IJGCT is needed to determine its efficacy.
피부질환별 직접면역형광검사의 결과에 대한 분석: 11년간의 단일 기관 후향적 연구
유동화 ( Dong-wha Yoo ),이장훈 ( Jang-hoon Yi ),박경덕 ( Kyung-deok Park ),권혁진 ( Hyeok-jin Kwon ),김기호 ( Ki-ho Kim ),윤정호 ( Jung-ho Yoon ) 대한피부과학회 2024 대한피부과학회지 Vol.62 No.1
Background: Direct immunofluorescence (DIF) is a histochemical technique used to detect tissue-bound autoantibodies and diagnose various immune-mediated skin diseases. Objective: This study aimed to evaluate the sensitivity of DIF for each disorder, and the consistency between clinical, histopathological, and DIF results. Methods: A retrospective study was conducted in 194 patients who underwent skin biopsy and DIF testing at our hospital between January 2011 and December 2021. An antibody panel against immunoglobulin G (IgG), IgA, IgM, C3, C1q, and fibrinogen was used. The concordance rate and κ-coefficient between the clinical, histopathological, and DIF results were evaluated. Results: DIF was observed to be positive in 87 cases; 51 cases of immune-mediated bullous diseases, seven cases of connective tissue diseases (CTDs), 25 cases of vasculitis, and four cases of other diseases. The overall sensitivity of DIF for immune-mediated bullous diseases was 71.8%, which was higher than that of histopathology (64.8%). In CTDs and vasculitis, the overall sensitivities of DIF were 30.4% and 65.8%, respectively, which were lower than those of histopathology (73.9% and 84.2%, respectively). In addition, good concordance among the clinical, histological, and DIF results was observed. Conclusion: DIF is a useful diagnostic method, especially for immune-mediated bullous diseases, lupus erythematosus, and Henoch-Schonlein purpura. However, in other CTDs and vasculitis cases, the sensitivity of DIF is relatively low. Therefore, the diagnostic value of DIF along with clinical and histopathological findings will be maximized only when the DIF test is performed for appropriate diseases. (Korean J Dermatol 2024;62(1):18∼28)
Effects of Five Fractions of Artemisia capillaris THUNB on Fas-mediated Apoptosis in HepG2 Cells
Lee, Jang-Hoon,Woo, Hong-Jung,Yi, Jong-Hoon WHO COLLABORATING CENTRE FOR TRADITIONAL MEDICINE 1999 東西醫學硏究所 論文集 Vol.1999 No.-
This study was carried out to examine the effect of five fractions of an aqueous extract from Artemisia capillaris THUNB(ACT). on etoposide-induced apoptosis, cell viability, cell cycle progression and mRNA expression of apoptosis-related genes in human hepatocyte cell line HepG2. The data shows that butanol fraction of ACT has no relation with cell cycle, however, it inhibits apoptosis and the action may be due to the suppression of Fas and Bax genes and activation of Bcl-2 gene.
박신명,이지현,이종훈,김영철,이장훈,우홍정 대한한방성인병학회 2000 韓方成人病學會誌 Vol.6 No.1
Primary biliary cirrhosis is a chronic disease of the liver characterized by autoimmune destruction of intrahepatic bile ducts and cholestasis. Primary biliary cirrhosis will cause cholestasis that may progress to cirrhosis and finally result in the liver failure. The pathogenesis of primary biliary cirrhosis is uncertain, however there is a close association between primary biliary cirrhosis and antimitochondrial antidody. Primary biliary cirrhosis is a relatively common autoimmune liver disease in western conuntry. But it is rare in Asia. Primary biliary cirrhosis affects mainly middle female. There is no definitive drug treatment, liver transplantation is indicated for patients with intractable symptoms and end-stage disease. The authors have experienced a case of primary biliary cirrhosis in 48 year-old female who had suffered from jaundice, ascites, fatigue and indigestion. We report a case of primary biliary cirrhosis with a review of literatures.