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치성 낭종의 임상-병리학적 소견과 TGF-α 및 TGF-β 발현
한경민,김용환,박진혁,윤형기,윤혜경,김우형,이희철 인제대학교 백병원 2002 仁濟醫學 Vol.23 No.4
Objective : Periapical cyst is a relatively common disease but heterogenous in histogenesis, and inflammatory reaction and fibrosis of varying degree are associated in the cystic wall. The aim of thes study is to evaluate the clinico-pathologic characteristics such as patient's age, ses, location, and the degree of inflammatory reaction and fibrosis of periapical cyst and the role of TGF-α and TGF-β cytokines in the inflammed periapical cyst. Methods and Material : The materials were 43 cases of periapical cyst and clinical information with age, sex, location(maxilla vs mandible, right vs left, region involved) were recorded. Histopathological examination on the degree of inflammatory reaction and fibrosis and immunohistochemical stining for TGF-α and TGF-β were perfomed. Satistical analyses between clinical parameters, the degree of inflammation and fibrosis and expressions for TGF-α and TGF-β were followed. Results : 1. Thirt(69.8%) of 43 cases were older than 20 year-old. and no significant differences of incidence according to patient's sex was noted. In 25(58.1%) out of 43 case. 20(54.1%) out of 37 cases, and 20(48.8%) of 41cases, the cyst was located on the maxilla. in right side and in premolar region respectively. 2. The cysts of developmental and inflammatory origin were 24(55.8%) and 19(44.2%) of 43 cases, respectively and there were no siginificant differences of patient's age, sex, and location of cysts according to the origin of cysts. 3. Fibrosis was more conspicuous in cases older than 20 year-old. (p=0.0179), but no significant difference in the degree of inflammatory reaction according to patient's age and in the degree of inflammatory reaction and fibrosis according to sex and location of the cysts were seen. 4. Inflammatory reaction was slightly more in cysts of inflammatory origin, but no significant defferences in degree of inflammation and fibrosis according to origin of the cysts. 5. The degree of inflammatory reaction and TGF-α and TGF-β expressions showed a tendency of positive correlation(p=0.1563), but there were no statistically significant relationships between the degree of inflammation and fibrosis and TGF-α and TGF-β expressions. 6. In the cysts of developmental origin, TGF-α expression in the epithelial cells was significantly increased than inflammatory origin, but TGF-α and TGF-β expressions in the inflammatory cells and stromal cells showed no significant difference according to the origin Conclusion : The degree of inflammatory reaction and fibrosis of periapical cysts was different according to patient's age and location of the cyst. TGF-α and TGF-β cystokines seemed to be involved in the inflammatory reaction and fibrosis of periapical cyst, however, TGF-α and TGF-β expressions was not parallel to the degree of inflammatory reaction and fibrosis. These results suggest that other cytokines in addition to TGF-α and TGF-β may also be involved in the inflammatory reaction and fibrosis of periapical cyst. Increased TGF-expression in the epithelial cells of the cysts of developmental origin could be a helpful finding to defferentiate the origin of the periapical cyst.
다제내성결핵 균주에서 Reverse Hybridization Assay를 이용한 Fluoroquinolone, Kanamycin 신속 내성 검사의 유용성
박진수 ( Chin Su Park ),성낙문 ( Nack Moon Sung ),황수희 ( Soo Hee Hwang ),전재현 ( Jae Hyun Jeon ),원영섭 ( Young Sub Won ),민진홍 ( Jin Hong Min ),김천태 ( Cheon Tae Kim ),강형석 ( Hyung Seok Kang ) 대한결핵 및 호흡기학회 2012 Tuberculosis and Respiratory Diseases Vol.72 No.1
Multidrug-resistant tuberculosis (MDR-TB) is an increasing public health problem and poses a serious threat to global TB control. Fluoroquinolone (FQ) and aminoglycoside (AG) are essential anti-TB drugs for MDR-TB treatment. REBA MTB-FQ? and REBA MTB-KM? (M&D, Wonju, Korea) were evaluated for rapid detection of FQ and kanamycin (KM) resistance in MDR-TB clinical isolates. M. tuberculosis (n=67) were isolated and cultured from the sputum samples of MDR-TB patients for extracting DNA of the bacilli. Mutations in genes, gyrA and rrs, that have been known to be associated with resistance to FQ and KM were analyzed using both REBA MTB-FQ? and REBA MTB-KM?, respectively. The isolates were also utilized for a conventional phenotypic drug susceptibility test (DST) as the gold standard of FQ and KM resistance. The molecular and phenotypic DST results were compared. Sensitivity and specificity of REBA MTB-FQ? were 77 and 100%, respectively. Positive predictive value and negative predictive value of the assay were 100 and 95%, respectively, for FQ resistance. Sensitivity, specificity, positive predictive value and negative predictive value of REBA MTB-KM? for detecting KM resistance were 66%, 94%, 70%, and 95%, respectively. REBA MTB-FQ? and REBA MTB-KM? evaluated in this study showed excellent specificities as 100 and 94%, respectively. However, sensitivities of the assays were low. It is essential to increase sensitivity of the rapid drug resistance assays for appropriate MDR-TB treatment, suggesting further investigation to detect new or other mutation sites of the associated genes in M. tuberculosis is required.
염화제이철 수용액에 의한 스테인레스 강판의 식각에 관한 연구
이형민 ( Hyung Min Lee ),박무룡 ( Moo Ryong Park ),박광호 ( Gwang Ho Park ),박진호 ( Chin Ho Park ) 한국화학공학회 2012 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.50 No.2
Wet chemical etching of stainless steel foil by aqueous ferric chloride solution was investigated in this study. Effects of various process parameters (e.g. etchant agitation rate, etchant temperature, Fe3+ ion concentration, free HCl concentration, specific gravity, etc.) on the etch rate was first studied, and it was found that the etch rate of AK (aluminum- killed) steel, chromium metal and stainless steel (STS430J1L alloy) follows the pseudo-first order reaction equation. When the fatigue ratio of etchant was kept under 16%, sludge was not formed in the solution, and the etched surface showed smooth roughness. The etch rate decreases as Baume of etchant increases, but the effect of free HCl concentration on the etch rate turned out to be minimal. Experimental data were compared with the calculated results from modeled equation, showing very good agreement.