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성견 수평골 소실시 치조골 재생에 영향을 주는 인자;I : 냉동 탈회 건조골 동종이식의 효과
김종관,채중규,조규성,최성호,정현철,문익상,Kim, Chong-Kwan,Chai, Jung-Kiu,Cho, Kyoo-Sung,Choi, Seong-Ho,Jung, Hyun-Cheol,Moon, Ik-Sang 대한치주과학회 1993 Journal of Periodontal & Implant Science Vol.23 No.3
Regeneration of periodontal tissue after a loss of attachment due to disease or trauma repesents an important issue in dentistry, and various bone graft materials have been used to regenerated lost periodontal tissue and restore proper fuctions. Among those, allografts have been extensively researched and widely used clinically, since they are known to possess an excellent osteoinduction capability and result in proper topography of alveolar bone. Regeneration of periodontal tissue in supraalveolar defects may be technically difficult. However, a large amount of regeneration has been observed by complete tissue coverage of involved teeth. In this study, supraalveolar defects in adult dogs were treated with periodontal surgery, decalcified freez-dried bone allograft, complete tissue coverage was attained, and effects on repair and regeneration of alveolar bone, cementum and periodontal ligament were studied. Exposure of premolar furcation of adult dogs was attained by removing marginal alveolar bone down to 5mm from CEJ, and root surfaces were planed with curettes. On the left side, defects were treated without any allograft(Control Group). On the right side, a DFDB was used(Experimental Group). In all groups, flaps were coronally positioned and sutured, completely submerging the treated defects. At two weeks, the crown were exposed 2-3mm. Healing progresses were histologically observed after eight weeks and the results were as follows : 1. Distance from CEJ to AJE was : $2.82{\pm}0.66mm$ in the control group, $1.71{\pm}0.51mm$ in experimental group, with significant differences between groups.(P<0.01) 2. Periodontal repair was : $2.18{\pm}0.66mm$ in the control group, $3.29{\pm}0.51mm$ in experimental group, with significant differences between groups.(P<0.01) 3. Connective tissue repair was : $1.43{\pm}0.52mm$ in the control group, $0.76{\pm}0.47mm$ in experimental group, with significant differences between groups.(P<0.01) Orientation of connective tissue fibers in relation to root surfaces was : mostly parallel in the control group, vertical or parallel or irregular in experimental group. 4. The amount of cementum formation was : $1.66{\pm}0.58mm$ in the control group, $2.86{\pm}0.66mm$ in experimental group, with significant differences between groups. 5. The amount of alveolar bone formation was : $0.76{\pm}0.72mm$ in the control group, $2.53{\pm}0.56mm$ in experimental group, with significant differences between groups.(P<0.01)
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위암에서 Collagen-4 및 Type-4 Collagenase의 발현과 예후인자로서 임상적 응용
노성훈(Sung Hoon Noh),이종인(Chong In Lee),정현철(Hyun Cheol Chung),박준오(Joon Oh Park),조재용(Jae Yong Cho),라선영(Sun Young Ra),유내춘(Nae Chun Yoo),김주항(Joo Hang Kim),노재경(Jae Kyung Roh),민진식(Jin Sik Min),김병수(Byung Soo K 대한소화기학회 1996 대한소화기학회지 Vol.28 No.1
N/A Background/Aims: In Korea, gastric cancer is the commonest cancer and the leading cause of cancer-related death. Though the most effective treatment for gastric cancer is radical resection, there are many patients with gastric cancer inoperable at the time of diagnosis. Collagen-IV, one of the major intrinsic components of the basement membrane, has cell adhesion function and it is known to be associated with tumor invasion or penetration. Type- IV collagenase, a metallo- proteinase purified from highly metastatic tumor cells, has been implicated in the process of invasion of epithelial and endothelial basement membranes in several steps of tumor invasion and metastasis. Methods: We retrospectively reviewed the clinical records of SO patients with histologically proven gastric cancer who had been treated in Yonsei University Medical Center and Yonsei Cancer Center between June l985 and June 1990. We perfonned immunohistochemical staining of surgically resected specimens of stomach cancers to investigate the expression rate and clinical relevance of collagen-lV and type-IV collagenase as prognostic niarkers. Results: Collagen- IV expression rate was 50% in 40 gastric cancers and type-IV collagenas expression rate was 76% in 50 gastric cancers. Six cases(30%) recurred in 20 collagen-IV positivc cases and six cases(30/c) recurred in 20 collagen-IV negative cases(p=1.00000). Eleven cases(29%) recurred in 38 type-P' collagenase positive cases and four cases(33%) recurred in 12 type-IV collagenase negative cases(p=0.77255). In the collagen-IV positive and negative group, 5-ye.ar disease-free survival rate was 607c and 67%, respectively(p=0.6725), and 5-year overal] survival rate was 71% and 827o, respectively(p=0.3953). In the type-IV collagenase positive and negative group, 5-year disease-free survival rate was 63% and 60%, respectively(p=0.6407), and 5-year ovevall survival rate was 78% and 60%, respectively (p=0.3822). Conclusions: Collagen-IV and type-lV collagenase were found in gastric tissues. However, together with recurrence rate and survival rat:, expressions of collagen- IV and type-IV collagenase were not significantly correlated with T state, nodal status, TNM stage and histologic differentiation of gastric cancer. Further studies to define the biological role of collagen-IV and type-IV collagenase is required. (Korean J Gastroenlerol 1996;28:1 - 10)
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