• 한국생물공학회:학술대회논문집
• /
• 한국생물공학회 2000년도 추계학술발표대회 및 bio-venture fair
• /
• pp.429-432
• /
• 2000

생체 적합성, 생분해성, 항균성 등의 특징을 갖는 키토산 지지체는 type I -p collagen과 bFGF 또는 fibronectin을 함께 코팅함으로써 세포적합성을 향상시켜 섬유아세포의 증식과 ECM의 분비를 증가시킬 수 있으며, 인공피부를 위한 적합한 지지체로 사용될 수 있다고 사료된다.

• 대한화장품학회지
• /
• 제30권2호
• /
• pp.221-225
• /
• 2004

인삼(Panax ginseng C. A Meyer)의 뿌리는 전통적인 항-노화 및 항-주름제로 동양에서 사용되어 왔다. 그러나 인삼의 어떤 성분이 주름 형성을 억제하는데 효과적인지는 아직 밝혀지지 않았다. 최근 인삼의 주요 활성 성분으로 생각되는 ginsenosides가 20가지 이상 분리되었다. 이들 중 본 연구원들은 인삼에 의한 항-주름의 작용기작을 밝히기 위해 세포간질(extracellular matrix, ECM) 물질대사에 있어 ginsenoside Rg3의 진피에서의 효과를 시험하였다. 본 연구에서, ginsenoside Rg3의 항-주름 효과를 연구하기 위해 진피의 세포간질 구성 성분과 성장 인자를 ELISA (enzyme-1in14ed immunosorbent assay) 측정법으로 평가하였다. Ginsenoside Rg3은 human dermal fibroblasts 배양에서 type I procollagen과 fibronectin(FN) 생합성을 농도 증가에 비례하여 촉진시키고(p < 0.05, n=3), 농도에 비례하여 TGF-$\beta$1 수준을 증가 (p < 0.05, n=3) 시키는 것으로 밝혀졌다. RT-PCR 분석에서 AP-1 전사 인자(transcription factor)의 일부인 c-Jun의 mRNA 수준이 human dermal fibroblasts에서 ginsenoside Rg3에 의해 감소되었다. 이들 결과들은 ginsenoside Rg3이 fibroblasts에서 TGF-$\beta$1과 AP-1의 발현을 변화시킴으로써 type I collagen과 FN합성을 촉진시킴을 보여준다.

• 한국미생물·생명공학회지
• /
• 제50권4호
• /
• pp.533-547
• /
• 2022

This study investigated the hair growth effect of Schisandra chinensis extract (TS-SC) and TS-SC fermented by Lactobacillus plantarum (TS-SCLF) on human dermal papilla cells (hDPCs). The production of vascular endothelial growth factor (VEGF), insulin-like growth factor 1 (IGF-1), keratinocyte growth factor/fibroblast growth factor 7 (KGF/FGF-7) and hepatocyte growth factor (HGF), transforming growth factor beta 1 (TGF-β1) were examined. The secretion rates of VEGF and KGF/FGF-7 were high in TS-SC, and the secretion rates of IGF-1 and HGF were high in TS-SCLF. TGF-β1 was inhibited in a concentration-dependent manner in all samples. Gene expression of VEGF, IGF-1, KGF, HGF and alkaline phosphatase, relevant to hair growth, were examined. The data revealed that TS-SC and TS-SCLF successfully promoted hair growth in hDPCs. The IGF-1 gene was expressed in a dose-dependent manner in TS-SCLF. These results indicate that TS-SC and TS-SCLF fermented extract effectively promoted hair growth and gene expression relevant to hair growth in hDPCs. Used in clinical trials the test substance 'CMK-LPF01' showed a statistically significant increase in the number of hairs at 8 weeks, 16 weeks, and 24 weeks compared to before product use, and a change in hair growth, a secondary efficacy evaluation variable. Through additional research in the future, it is expected that "CMK-LPF01" can be developed as a functional material that can help alleviate symptoms of hair loss.

• 한국약용작물학회지
• /
• 제15권5호
• /
• pp.311-314
• /
• 2007

Vascular endothelial growth factor (VEGF) and basic fibroblast growth factor (bFGF) are the most important angiogenic molecules associated with tumor-induced neovascularization. This study was carried out to investigate inhibitory effect of extracts from root of Rehmannia glutinosa LIBOSCHITZ (Rehmannia Radix and Rehmannia Radix Preparata) on endothelial cell proliferation. The methanol extracts from the medicinal herb were fractionated into n-hexane, ethyl acetate, n-butanol and aqueous fractions. Among the four fractions, the n-butanol fraction from R. Radix on exhibited highly effective inhibition (${\approx}79%$ inhibition) on the binding of KDR/Flk-1-Fc to immobilized $VEGF_{165}$ and then ethyl acetate fraction from R. Radix (${\approx}45%$ inhibition) at the concentration of $100\;{\mu}g/ml$. The n-butanol fraction efficiently blocked the VEGF- and bFGF-induced HUVEC proliferation in a dose-dependent manner, but did not affect the growth of HT1080 human fibrosarcoma cells. The n-butanol fraction more efficiently blocked the binding of KDR/Flk-1-Fc to immobilized $VEGF_{165}$ and VEGF- and bFGF-induced human umbilical vein endothelial cell proliferation than the fraction from R. Radix Preparata. Our results suggest that Rehmannia Radix may be used as a candidate for developing anti-angiogenic agent.

• Applied Microscopy
• /
• 제45권2호
• /
• pp.80-88
• /
• 2015

The structural change and distribution of mitochondrial enzyme (ATPase, cytochrome-c-oxidase), cell proliferation (proliferating cell nuclear antigen, PCNA), cell death (caspase-3) and cell growth factor (fibroblast growth factor 8, FGF-8) in the Sprague-Dawley rat bile duct during Clonorchis sinensis infection was investigated. Experimental groups were divided into C. sinensis infection, superinfection and reinfection of C. sinensis after 'praziquantel' treatment group. As a result, C. sinensis infected rat bile ducts showed the features of chronic clonorchiasis, i.e., connective tissue thickening, ductal fibrosis and epithelial tissue dilatation. PCNA for cell proliferation increased in the infection group, and decreased after praziquantel treatment. Caspase-3 was distributed in reinfection group only. FGF-8 was distributed in the rat bile duct after praziquantel treatment but not distributed in infection and reinfection group. Overall, C. sinensis infection causes physical and chemical irritations and then brings on the abnormalities of intracellular energy metabolism and cellular growth factors, which hinders bile duct tissue from functioning properly, and resultingly, fibrosis occurs and epithelial cells dilated abnormally. More intense infection makes tissue fibrosis chronical and activates apoptosis factors.

• Molecules and Cells
• /
• 제42권8호
• /
• pp.589-596
• /
• 2019

${\beta}Pix$ is a guanine nucleotide exchange factor for the Rho family small GTPases, Rac1 and Cdc42. It is known to regulate focal adhesion dynamics and cell migration. However, the in vivo role of ${\beta}Pix$ is currently not well understood. Here, we report the production and characterization of ${\beta}Pix$-KO mice. Loss of ${\beta}Pix$ results in embryonic lethality accompanied by abnormal developmental features, such as incomplete neural tube closure, impaired axial rotation, and failure of allantois-chorion fusion. We also generated ${\beta}Pix$-KO mouse embryonic fibroblasts (MEFs) to examine ${\beta}Pix$ function in mouse fibroblasts. ${\beta}Pix$-KO MEFs exhibit decreased Rac1 activity, and defects in cell spreading and platelet-derived growth factor (PDGF)-induced ruffle formation and chemotaxis. The average size of focal adhesions is increased in ${\beta}Pix$-KO MEFs. Interestingly, ${\beta}Pix$-KO MEFs showed increased motility in random migration and rapid wound healing with elevated levels of MLC2 phosphorylation. Taken together, our data demonstrate that ${\beta}Pix$ plays essential roles in early embryonic development, cell spreading, and cell migration in fibroblasts.

• Animal Bioscience
• /
• 제34권8호
• /
• pp.1392-1402
• /
• 2021

Objective: The growth rate of pigs is related to differentiation and proliferation of muscle cells, which are regulated by growth factors and expression of growth-related genes. Thus, the objective of this study was to establish optimal culture conditions for Jeju black pig (JBP) muscle cells and determine the relationship of various factors involved in muscle growth with the proliferation of JBP muscle cells. Methods: Muscles were taken from the femur skeletal muscle of JBP embryos. After isolation of the muscle cells, cells were cultured in a 6-well plate under four different culture conditions to optimize culture conditions for JBP muscle cells. To analyze proliferation rate of JBP muscle cells, these muscle cells were seeded into 6-well plates at a density of 1.5×10⁵ cells per well and cultured for 3 days. Western blot and quantitative real-time polymerase chain reaction were applied to verify the myogenic differentiation 1 (MyoD) expression and growth-related gene expression in JBP muscle cells, respectively. Results: We established a muscle cell line from JBP embryos and optimized its culture conditions. These muscle cells were positive for MyoD, but not for paired box 7. The proliferation rate of these muscle cells was significantly higher in a culture medium containing bFGF and epidermal growth factor + basic fibroblast growth factor (EGF+bFGF) than that without a growth factor or containing EGF alone. Treatment with EGF and bFGF significantly induced the expression of MyoD protein, an important transcription factor in muscle cells. Moreover, we checked the changes of expression of growth-related genes in JBP muscle cells by presence or absence of growth factors. Expression level of collagen type XXI alpha 1 gene was changed only when EGF and bFGF were added together to culture media for JBP muscle cells. Conclusion: Concurrent use of EGF and bFGF increased the expression of MyoD protein, thus regulating the proliferation of JBP muscle cells and the expression of growth-related genes.

• Asian Pacific Journal of Cancer Prevention
• /
• 제13권9호
• /
• pp.4823-4826
• /
• 2012

Objective: To explore serum angiogenic factor expression in patients with osteosarcoma and its relationship with metastasis. Methods: Immunohistochemistry was used to test the expression of CD34 and FVIII-Rag in osteosarcoma tissues of 36 patients (osteosarcoma group) and microvessel density (MVD) was also recorded. In addition, ELISA was used to test the level of vascular endothelial growth factor (VEGF), basic fibroblast growth factor (bFGF), transforming growth factor-${\beta}1$ (TGF-${\beta}1$) and endostatin (ES) in the osteosarcoma group and in a control group. Results: VEGF and ES level were significantly higher than in the control group before operation (P<0.01), VEGF, bFGF and TGF-${\beta}1$ correlating with the ES level (P<0.01). Serum VEGF and ES levels of osteosarcoma patients before surgery were closely related to relapse and metastasis; moreover, serum VEGF increased with MVD (P<0.01). Postoperative VEGF and ES levels were lower than the preoperation values (P<0.01); ES level in relapse group was significantly higher than that of the non-relapse group (P<0.01). Conclusion: Preoperative serum VEGF and postoperative ES levels have great predictive value with regard to relapse of osteosarcoma patients.

• Journal of Microbiology and Biotechnology
• /
• 제7권4호
• /
• pp.267-271
• /
• 1997

We developed a dermal equivalent (DE) which was engineered using human dermal fibroblasts and a matrix of collagen gel. The in vitro construction of the DE was accomplished by casting a porcine collagen type I solution plus concentrated medium with isolated and cultured fibroblasts. These constructs were attached to culture dishes or left floating in culture medium. Contraction of attached gels results in decreased gel thickness without a change in gel diameter, and contraction of floating gels results in decreased gel thickness and diameter. After contraction, there was no increase in cell number in floating gels, but cells in attached gels began to increase after about 4 days of the lag phase in cell growth curve. At this lag phase, addition of fibroblast growth factor (FGF) at a concentration of $0.1{\mu}$/ml promoted cell proliferation in the attached collagen gels, but no effect in floating gels. These results indicate that the method of contraction had an influence on the extracellular matrix (ECM) organization, and this influenced not only cell growth but also fibroblast responsiveness to FGF. This suggests that attached collagen gel is more suitable as a dermal equivalent than the floating gel. And the final contracted area of attached gel is much larger than that of the floating gel since floating gel is contracted in all directions but attached gel is contracted only vertically.

• 대한한방부인과학회지
• /
• 제30권2호
• /
• pp.49-70
• /
• 2017

목 적: 본 연구는 한의학에서 면포질환에 빈번히 사용하는 대표적인 복합처방인 청상방풍탕의 열수 추출물 동결건조물의 피부 노화 개선 효과 평가를 위하여 피부재생, 주름개선, 미백 및 보습 효과를 각각 평가하였고, 기본적인 독성 평가의 일환으로 세포독성 또한 in vitro 방법으로 평가하였다. 방 법: 본 연구에서는 human normal fibroblast(CRL-2076) 세포 및 B16/F10 murine melanoma(CRL-6475) 세포에 대한 청상방풍탕 열수 추출 동결건조물(수율 18.71%)의 세포독성을 MTT(3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-tetrazolium Bromide) 방법을 통해 평가하였고, B16/F10 melanoma cells의 melanin 생성 억제 정도 및 melanin 합성 필수 효소인 tyrosinase 활성 억제와 arbutin을 비교 평가하여 미백효과를 평가하였다. 또한 피부 재생 및 주름 개선 효과를 transforming growth factor(TGF)-${\beta}1$와 fibroblast의 collagen type I 합성능을 비교, phosphoramidon disodium salt(PP)와 세포외 기질의 분해에 관여하는 elastase활성 억제를 비교, oleanolic acid(OA)와 hyaluronidase, collagenase 및 matrix metalloproteinase(MMP)-1 활성 억제를 비교하여 각각 평가하였고, 마우스 피부 수분함량 변화를 관찰하여 보습효과를 평가하였다. 결 과: 본 실험의 결과, 청상방풍탕은 human normal fibroblast 세포 및 B16/F10 murine melanoma 세포에서 최고 농도인 500 mg/ml까지 유의한 세포독성이 나타나지 않았고, fibroblast의 collagen type I 합성을 증가시켰다. 또한 세포외기질 파괴와 연관된 것으로 알려진 hyaluronidase, elastase, collagenase 및 MMP-1 활성을 각각 억제하였고 melanin의 생성에 관여하는 tyrosinase의 활성 및 B16/F10 melanoma 세포의 melanin 생성을 농도 의존적으로 차단함이 관찰되었다. 이와 더불어 정상매체 대조군에 비해 청상방풍탕 경구 투여군이 투여 용량 의존적으로 마우스 피부 수분 함량을 유의성 있게 증가시켰다. 결 론: 이상의 결과에서, 청상방풍탕은 세포 독성 없이 피부재생, 주름개선, 미백 및 보습 효과를 나타남이 관찰되어 차후 피부 개선 소재로서 그 가치가 높을 것으로 판단되나 금후 개별 구성 약재 각각에 대한 효능 및 생리활성을 나타내는 화학성분의 검색과 더불어 다양한 방면으로 기전적인 연구와 피부 보호 효과에 대한 in vivo평가를 체계적으로 수행해야 할 것으로 판단된다.