• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제41권1호
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• pp.26-29
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• 2015

Objectives: The purpose of this study is to retrospectively evaluate the postoperative complication rates for absorbable type-I collagen sponge (Ateloplug; Bioland) use in third molar extraction. Materials and Methods: From January to August 2013, 2,697 total patients undergoing third molar extraction and type-I collagen sponge application in the Department of Oral and Maxillofacial Surgery at Yonsei University Dental Hospital (1,163 patients) and Dong-A University Hospital (1,534 patients) were evaluated in a retrospective study using their operation and medical records. Results: A total of 3,869 third molars in 2,697 patients were extracted and the extraction sockets packed with type-I collagen sponges to prevent post-operative complications. As a result, the overall complication rate was 4.52%, with 3.00% experiencing surgical site infection (SSI), 1.14% showing alveolar osteitis, and 0.39% experiencing hematoma. Of the total number of complications, SSI accounted for more than a half at 66.29%. Conclusion: Compared to previous studies, this study showed a relatively low incidence of complications. The use of type-I collagen sponges is recommended for the prevention of complications after third molar extraction.

• 분석과학
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• 제28권6호
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• pp.361-369
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• 2015

골관절염에 대한 참당귀 추출분말 (AGE)의 치료효과를 검토하고자 토끼연골세포와 흰쥐의 monosodium iodoacetate (MIA)로 유발된 골관절염 부위에서 시료를 채취하여 MMPs의 발현에 대한 AGE의 억제 효능을 검토하였다. 고 농도의 AGE (50 μg/mL) 투여에서 세포독성은 관찰되지 않았으며 면역 및 염증반응과 관련된 여러 인자의 전사인자인 NF-κB 활성화를 효과적으로 억제시켰다. 토끼연골 세포에서 MMP-2와 MMP-9의 활성을 확인해본 결과 AGE는 MMP-9의 활성을 효과적으로 억제시키는 것을 확인하였다. AGE를 토끼연골세포에 처리하여 분석한 결과, 주요성분인 decursin과 decursinol angelate가 3.62±0.47 μg/mg protein와 2.14±0.36 μg/mg protein으로 검출되었다. 동물실험을 위하여, 골관절염은 MIA를 흰쥐 무릎관절에 처리하여 동물모델을 만들었으며, 매일 25, 50와 100 mg/kg의 AGE를 3주 동안 먹인 결과 흰쥐의 연골 조직에서 MMPs가 억제되는 것을 확인하였다. 연골조직으로부터 RT-PCR을 통해 collagen Type I, collagen Type II, aggrecan 및 MMPs (MMP-3, MMP-9, MMP-13)의 mRNA를 확인해본 결과 AGE는 collagen Type I, collagen Type II, aggrecan은 증가시키며 MMPs는 감소시키는 효과를 얻었다. 결론적으로 AGE는 MMPs 억제를 통하여 골관절염의 발생을 억제한다.

• 대한화장품학회:학술대회논문집
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• 대한화장품학회 1996년도 4차 심포지움(Skin Biology Efficacy)
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• pp.52-67
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• 1996

새로운 노화방지 물질로 개발한 3-APPA가 노화에 의해 야기되는 여러 변화들, 특히 세포 증식, 유전자 수준 및 단백질 수준에서의 collagen의 생합성 변화, 면역조직화학염색을 이용한 collagen 생합성의 변화등을 세포배양 및 동물실험을 통하여 측정하였다. MTT assay를 이용한 인체 피부 섬유아세포의 증식 실험에서 3-APPA는 무처치군에 비교해서 최고 2배의 섬유아세포 증식 효능을 나타내었으며, $^3$[H]-proline incorporation 방법을 이용한 단층세포 배양 및 3차원 dermal equivalent 섬유아세포 배양에서 무처치군 및 vitamin C 처리군에 비해 최고 1.5배의 collagen 생합성 증가를 나타내었다. 그러나 type I alpha-procollagen mRNA expression에는 영향을 미치지 않는 것으로 나타났다. H&E 염색을 이용한 hairless mice의 피부에 대한 형태학적 변화 및 type I pM procollagen antibody를 이용한 면역조직화학염색에서, 3-APPA는 collagen 생합성을 증가시키는 것으로 나타났다. 이상의 결과에서 3-APPA는 섬유아세포 배양 및 hairless mouse를 이용한 실험에서 피부 섬유아세포 증식을 촉진시키며 collagen 생합성을 증가시켜 피부노화를 억제 할 수 있는 물질임을 밝혔다.

• Restorative Dentistry and Endodontics
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• 제21권2호
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• pp.546-558
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• 1996

The purpose of this vitro study was to evaluate the activity of human pulpal cells to adhesive glycoprotein-coated and non-coated culture dishes. Well known adhesive glycoproteins were used, such as type I collagen, type IV collagen, fibronectin, laminin, and vitronectin. Each adhesive glycoproteins applied onto the culture dishes. In this study, the protein coated and non-coated dishes were classified as each groups. Human pulpal cells cultured onto each groups. After 24 hours, 48 hours, 72 hours incubation time, radioactivity with scintillation counter for evaluation of the activity of human pulpal cells. The results as follows : 1. After 24 hours incubation time, activity of human pulpal cells were best in laminin-coated group among groups. Then fibronectin, type I collagen group were better, and all proteins were better than control. 2. After 48 hours incubation time, activity of human pulpal cells were best in fibronectin coated group. 3. After 72 hours incubation time, activity of human pulpal cells were not significantly different in all of adhesive glycoproteins. 4. After 24 hours incubation time, activity of human pulpal cells were best in fibronectin and laminin coated group. Activity of human pulpal cells in type I collagen coated group were better after 24 hours incubation time then 48 hours incubation time.

• 대한화장품학회:학술대회논문집
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• 대한화장품학회 2003년도 IFSCC Conference Proceeding Book II
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• pp.239-240
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• 2003

Type I (collagen) and procollagen are reduced in aged human skin. This reduction could result from increased degration by metalloproteinases and from reduced procollagen synthesis and skin collagenase is required for initiation of the degration of type I collagen. In the present study, we study on assay the collagen and collagenase in natural plants using the fibroblast human skin cell. We select the 15 kind of plants used to herbal and 4 kind of fraction(by methylene chloride, ethyl acetate, n-butanol, water). Among these extract, the ethyl acetate fraction from benincasa hispida/prunus persica, trichosanthes kiriowii, trogopterus xanthipes and methylene chloride fractions from benincasa hispida/prunus persica, torilis japonica and n-butanol fraction from cnidium officinale, chrysanthemum sibiricum were selected for further experiments as they exhibited distinctive amount of collagen compared to other natural extracts. These extracts were again subjected to collagenase assay test. Benincasa hispida/prunus persica extract was shown to have exellent collagen synthesis activity from result of the collagen assay test and the other extract was shown to have over 130% of collagen synthesis activity. But, in the study of collagenase assay test just only trogopterus xanthipes extract was shown to have collagenase inhibition.

• International Journal of Oral Biology
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• 제35권3호
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• pp.99-106
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• 2010

Luteolin is a flavonoid that exists in a glycosylated form in celery and green pepper. Flavonoids possess antioxidant and anti-inflammatory properties and can reduce the expression of key inflammatory molecules in macrophages and monocytes. It has been reported also that some flavonoids have effects on bone metabolism. The effects of luteolin on the function of osteoblasts were investigated by measuring cell viability, alkaline phosphatase activity, type I collagen production, osteoprotegerin secretion, Wnt promoter activity, BMP-2 and Runx2 expression and calcified nodule formation. Luteolin has no effects upon osteoblast viability but induced an increase in alkaline phosphatase activity, type I collagen production and a decrease in osteoprotegerin secretion in these cells. Luteolin treatment also upregulated BMP-2 mRNA expression. These results suggest that luteolin may be a regulatory molecule that facilitates the differentiation of osteoblasts.

• Archives of Plastic Surgery
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• 제35권5호
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• pp.491-494
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• 2008

Purpose: When deciding a treatment plan in diabetic foot ulcer patients, predicting a possibility of healing wounds is important since not a few patients have poor general condition to get successful wound healing. This study was planned to find out if a serum collagen level can be used as a predictor for healing wounds in diabetic foot patients. Methods: Fifty-seven patients, who visited our clinic from January to June, 2007 for treatment of diabetic foot ulcers, were included in this study. Serum levels of type I collagen were checked using carboxy terminal type I propeptide kits. Simultaneously serum levels of vitamin C and iron, cofactors of collagen synthesis, were checked. The patients were divided into two groups; a group of successfully healed wounds and the other of unhealed wounds. Serum levels of the parameters were compared between the 2 groups. Results: The serum level of collagen was $197.65{\pm}86.26ng/ml$ in a healed group and $87.91{\pm}28.76ng/ml$ in the unhealed group(p<0.05). The serum iron and vitamin C levels were did not show significant differences. Conclusion: The serum collagen level may predict healing or nonhealing wounds in diabetic foot ulcers.

• BMB Reports
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• 제47권2호
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• pp.110-114
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• 2014

Fibrin is a natural provisional matrix found in wound healing, while type I collagen is a major organic component of bone matrix. Despite the frequent use of fibrin and type I collagen in bone regenerative approaches, their comparative efficacies have not yet been evaluated. In the present study, we compared the effects of fibrin and collagen on the proliferation and differentiation of osteoblasts and protein adsorption. Compared to collagen, fibrin adsorbed approximately 6.7 times more serum fibronectin. Moreover, fibrin allowed the proliferation of larger MC3T3-E1 pre-osteoblasts, especially at a low cell density. Fibrin promoted osteoblast differentiation at higher levels than collagen, as confirmed by Runx2 expression and transcriptional activity, alkaline phosphatase activity, and calcium deposition. The results of the present study suggest that fibrin is superior to collagen in the support of bone regeneration.

• Archives of Plastic Surgery
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• 제33권6호
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• pp.723-731
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• 2006

Purpose: Collagen is the principal structural biomolecule in cartilage extracellular matrix, which makes it a logical target for cartilage engineering. In this study, porous type I collagen scaffolds were cross-linked using dehydrothermal(DHT) treatment and/or 1-ethyl-3-(3-dimethyl aminopropyl) carbodiimide(EDC), in the presence and absence of chondroitin-6-sulfate(CS) for cartilage regeneration. Methods: Cartilage defects were created in the proximal part of the ear of New Zealand rabbits. Four types of scaffolds(n=4) were inserted. The types included DHT cross-linked(Group 1), DHT and EDC cross- linked(Group 2), CS added DHT cross-linked(Group 3), and CS added DHT and EDC cross-linked(Group 4). Histomorphometric analysis and cartilage-specific gene expression of the reconstructed tissues were evaluated respectively 4, 8, and 12 weeks after implantation. Results: The largest quantity of regenerated cartilage was found in DHT cross-linked groups 1 and 3 in the 8th week and then decreased in the 12th week, while calcification increased. Calcification was observed from the 8th week and the area increased in the 12th week. Group 4 was treated with EDC cross-linking and CS, and the matrix did not degrade in the 12th week. Cartilage-specific type II collagen mRNA expression increased with time in all groups. Conclusion: CS did not increase chondrogenesis in all groups. EDC cross-linking may prevent chondrocyte infiltration from the perichondrium into the collagen scaffold.

• Journal of Periodontal and Implant Science
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• 제34권1호
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• pp.223-241
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• 2004

골재생을 위해 사용되는 골이식재로 자가골, 동종골, 이종골 등이 있다. 자가골은 가장 예지성이 높은 골이식재이지만, 부가적인 수술, 환자의 동통과 불편, 채취하는 양의 제한, 비용의 증가 등의 단점이 있다. 따라서 많은 연구자들은 오랫동안 자가골을 대체할 골이식재 개발에 힘써왔고, 다양한 연구가 있었다. 소로부터 유래한 이종골은 천연 다공성의 골 무기질로서, 인간의 골의 구조와 유사하면서, 골 전도성이 있고, 생체 적합성이 뛰어나다고 보고되었다. 이에 최근에 개발된 Ca-P 박막이 이종골과 조작성을 용이하게 하기 위해 부가적으로 type I collagen을 혼합한 골이식재를 토끼 두개골 결손부에 매식하여 골형성 능력 및 주변 조직의 반응을 보고자 하였다. 총 16마리의 New Zealand white rabbits를 사용하였고, 두개골에 4부위의 결손부를 형성한 후, 다음과 같이 적용하였다. 이식재를 넣지 않은 군을 음성대조군으로, 자가골 분말을 이식한 군을 양성대조군으로, Ca-P 박막 탈단백 우골 분말을 이식한 군을 실험1군으로, Ca-P 박막 탈단백 우골 분말과 type I collagen을 같은 부피로 혼합하여 이식한 군을 실험2군으로 하였다. 1, 2, 4, 8주째 4마리씩 희생하여, H-E 염색과 Masson's trichrome 염색을 시행한 후, 광학현미경을 사용하여 조직학적으로 관찰하였다. 토끼 두개골 결손부에 이식한 Ca-P 박막 탈단백 우골은 골성회복초기에 골결손부 변연에서 골전도성을 보였지만, 완전한 골성회복을 이루지 못하였고, 신생골과 직접적인 유합을 보이지 않았다. 또, collagen의 부가적인 사용은 조작성은 가장 우수했으나, 조직소견상 신생골의 형성을 보이지는 않았다. 반면 자가골을 이식한 부위는 신생골 형성양과 밀도에 있어서 가장 우수한 결과를 보였다.