• The Korean Journal of Legal Medicine
• /
• 제40권2호
• /
• pp.61-64
• /
• 2016

Ehlers-Danlos syndrome type IV (EDS IV) is a hereditary disorder of the connective tissue, characterized by easy bruising, thin skin with visible veins, and spontaneous rupture of the large arteries, uterus, or bowel. EDS IV is caused by mutations of the gene for type III procollagen (COL3A1), resulting in insufficient collagen production or a defect in the structure of collagen. EDS IV can have fatal complications such as the rupture of great vessels or organs, which can cause hemorrhaging and sudden unexpected death. Here, we report a case of a 43-year-old female who collapsed after a struggle with a neighbor. In this patient, the bifurcation of the bilateral common iliac artery ruptured, with no evidence of trauma, inflammation, or atherosclerosis. Genetic analysis of COL3A1 showed the presence of a c.2771G>A (p.Gly924Arg) mutation, which may be associated with EDS IV. The forensic pathologist should consider the possibility that the spontaneous visceral or arterial rupture was caused by EDS IV. Genetic analysis is not currently a routine procedure during autopsy. However, in this case, we suggest that the patient possibly had an underlying EDS IV condition, and we recommended family members of the deceased to seek genetic analysis and counseling.

• 대한화장품학회지
• /
• 제37권1호
• /
• pp.75-81
• /
• 2011

본 연구에서는 유산균 발효에 의한 인삼열매 추출물의 여러 가지 생리활성을 평가하였다. 고성능액체크로마토그래피를 수행하여 인삼열매 추출물과 유산균 발효 인삼열매 추출물의 ginsenoside Re, Rc 및 Rb1의 함량분석 결과 유산균 발효에 의해 ginsenoside Re, Rc 및 Rb1의 함량이 모두 증가하였다. 인삼열매 추출물과 유산균 발효 인삼열매 추출물의 DPPH free radical 소거활성과 SOD 유사활성 측정결과 1.00 %의 농도에서 유산균 발효 인삼열매 추출물은 각각 86.34, 76.82 %의 DPPH free radical 소거활성과 SOD 유사활성을 나타내었고, 인삼열매 추출물은 각각 49.78, 40.80 %의 DPPH free radical 소거활성과 SOD 유사활성을 나타내어 유산균 발효에 의해 항산화 활성이 증가하는 것을 확인하였다. 또한 유산균 발효 인삼열매 추출물 0.50 %의 농도로 처리한 피부 섬유아세포에서 procollagen type I (COL1A1)은 828.13 % 증가하였으며, matrix metalloproteinase (MMP)-1은 87.88 %, tumor necrosis factor (TNF)-${\alpha}$는 99.92 %감소하는 효과를 보여주었다. 이처럼 항산화, 주름, 항염에 효능을 보이는 유산균 발효에 의한 인삼열매 추출물은 기능성 화장품 소재로 개발될 수 있는 가능성이 있다.

• Asian-Australasian Journal of Animal Sciences
• /
• 제26권3호
• /
• pp.394-400
• /
• 2013

A total of 192 broiler chicks were used to evaluate the influence of dietary ${\alpha}$-lipoic acid (ALA) on growth performance, carcass characteristics and meat quality of broiler chickens with the purpose of developing a strategy to prevent the occurrence of pale, soft, and exudative (PSE) meat and to improve the meat quality of broilers. At 22 d of age, birds were allocated to 4 ALA treatments (0, 400, 800, and 1200 ppm). The results showed that dietary ALA significantly decreased average feed intake (AFI), average daily gain (ADG), final live body weight (BW) and carcass weight (p<0.05), while no difference in feed conversion ratio (FCR) was detected among chickens fed with and without ALA. Abdominal fat weight significantly decreased (p<0.05) for broilers fed 800 and 1200 ppm ALA. However when calculated as the percentage of carcass weight there was no significant difference between control and ALA treatments. Meat quality measurements showed that dietary ALA regulated postmortem glycolysis and improved meat quality as evidenced by increased muscle pH and decreased drip loss of meat (p<0.05). Although ALA did not change the tenderness of meat as indicated by meat shear force, dietary ALA decreased collagen content and mRNA expression of COL3A1 gene (p<0.05). In conclusion, the results indicate that dietary ALA may contribute to the improvement of meat quality in broilers.

• Biomolecules & Therapeutics
• /
• 제15권2호
• /
• pp.95-101
• /
• 2007

Resveratrol (3,5,4’-trihydroxy-trans-stilbene), a naturally occurring phytoallexin abundant in grapes and several plants, has been shown to be active in inhibiting proliferation and inducing apoptosis in several human cancer cell lines. On the line of the biological activity of resveratrol, a variety of resveratrol analogs were synthesized and evaluated for their growth inhibitory effects against several human cancer cell lines. In the present study, we found that one of the resveratrol analogs, 3,4,5-trimethoxy-4’-bromo-cis-stilbene, markedly suppressed human colon cancer cell proliferation (EC$_{50}$ = 0.01 ${\mu}$g/ml), and the inhibitory activity was superior to its corresponding trans-isomer (EC$_{50}$ = 1.6 ${\mu}$g/ml) and resveratrol (EC$_{50}$ = 18.7 ${\mu}$g/ml). Prompted by the strong growth inhibitory activity in cultured human colon cancer cells (Col2), we investigated its mechanism of action. 3,4,5-Trimethoxy-4’-bromo-cis-stilbene induced arrest of cell cycle progression at G2/M phase and increased at sub-G1 phase DNA contents of the cell cycle in a time- and dose-dependent manner. Colony formation was also inhibited in a dose-dependent manner, indicating the inhibitory activity of the compound on cell proliferation. Moreover, the morphological changes and condensation of the cellular DNA by the treatment of the compound were well correlated with the induction of apoptosis. These data suggest the potential of 3,4,5-trimethoxy-4’-bromo-cis-stilbene might serve as a cancer chemotherapeutic or chemopreventive agent by virtue of arresting the cell cycle and inducing apoptosis for the human colon cancer cells.

• BMB Reports
• /
• 제44권4호
• /
• pp.285-290
• /
• 2011

Caenorhabditis elegans undergoes a developmental molting process that involves a coordinated interplay among diverse intracellular pathways. Here, we investigated the functions of two fatty acid biosynthesis genes; pod-2, encoding acetyl-CoA carboxylase, and fasn-1, encoding fatty acid synthase, in the C. elegans molting process. Although both the pod-2 and fasn-1 genes were expressed at constant levels throughout C. elegans development, knockdown of the proteins encoded by these genes using RNA interference produced severe defects in triglyceride production, molting, and reproduction that were coupled to suppression of NAS-37, a metalloprotease. An assessment of the structure and integrity of the cuticle using a COL-19::GFP marker and Hoechst 33258 staining showed that downregulation of either pod-2 or fasn-1 impaired cuticle formation and disrupted the integrity of the cuticle and the hypodermal membrane.

• BMB Reports
• /
• 제45권9호
• /
• pp.509-514
• /
• 2012

We have found that the previously uncharacterized bone morphogenetic protein-9 (BMP9) is one of the most osteogenic factors. However, it is unclear if BMP9 cross-talks with $TGF{\beta}1$ during osteogenic differentiation. Using the recombinant BMP9 adenovirus, we find that low concentration of rh$TGF{\beta}1$ synergistically induces alkaline phosphatase activity in BMP9-transduced C3H10T1/2 cells and produces more pronounced matrix mineralization. However, higher concentrations of $TGF{\beta}1$ inhibit BMP9-induced osteogenic activity. Real-time PCR and Western blotting indicate that BMP9 in combination with low dose of $TGF{\beta}1$ potentiates the expression of later osteogenic markers osteopontin, osteocalcin and collagen type 1 (COL1a2), while higher concentrations of $TGF{\beta}1$ decrease the expression of osteopontin and osteocalcin but not COL1a2. Cell cycle analysis reveals that $TGF{\beta}1$ inhibits C3H10T1/2 proliferation in BMP9-induced osteogenesis and restricts the cells in $G_0/G_1$ phase. Our findings strongly suggest that $TGF{\beta}1$ may exert a biphasic effect on BMP9-induced osteogenic differentiation of mesenchymal stem cells.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 1995년도 하계학술대회 논문집 C
• /
• pp.1242-1244
• /
• 1995

The dielectric and polarizable properties of $0.9Pb_{1-x}La_x({Mg}_{1/3}Nb_{2/3})O_3-0.1PbTiO_3$ (x=0,1,2,3,4,5) have been investigated. The temperature-dependant electrostictive characteristics of 0.9PMN-0.1PT relaxor ferroelectric system were improved by enhencing the extent of the diffuse phase transition(DPT). This was achieved using PMN-PTceramics by the partial substitution of La at the Pb site. The curie temperature and the maximum dielectric permittivity decreased by substituting La and the electric field-related hysteresis phenomena decreased with increasing La substitution amount.

• Molecules and Cells
• /
• 제42권11호
• /
• pp.763-772
• /
• 2019

Periodontitis is characterized by the loss of periodontal tissues, especially alveolar bone. Common therapies cannot satisfactorily recover lost alveolar bone. Periodontal ligament stem cells (PDLSCs) possess the capacity of self-renewal and multilineage differentiation and are likely to recover lost alveolar bone. In addition, periodontitis is accompanied by hypoxia, and hypoxia-inducible $factor-1{\alpha}$ ($HIF-1{\alpha}$) is a master transcription factor in the response to hypoxia. Thus, we aimed to ascertain how hypoxia affects runt-related transcription factor 2 (RUNX2), a key osteogenic marker, in the osteogenesis of PDLSCs. In this study, we found that hypoxia enhanced the protein expression of $HIF-1{\alpha}$, vascular endothelial growth factor (VEGF), and RUNX2 ex vivo and in situ. VEGF is a target gene of $HIF-1{\alpha}$, and the increased expression of VEGF and RUNX2 proteins was enhanced by cobalt chloride ($CoCl_2$, $100{\mu}mol/L$), an agonist of $HIF-1{\alpha}$, and suppressed by 3-(5'-hydroxymethyl-2'-furyl)-1-benzyl indazole (YC-1, $10{\mu}mol/L$), an antagonist of $HIF-1{\alpha}$. In addition, VEGF could regulate the expression of RUNX2, as RUNX2 expression was enhanced by human VEGF ($hVEGF_{165}$) and suppressed by VEGF siRNA. In addition, knocking down VEGF could decrease the expression of osteogenesis-related genes, i.e., RUNX2, alkaline phosphatase (ALP), and type I collagen (COL1), and hypoxia could enhance the expression of ALP, COL1, and osteocalcin (OCN) in the early stage of osteogenesis of PDLSCs. Taken together, our results showed that hypoxia could mediate the expression of RUNX2 in PDLSCs via $HIF-1{\alpha}$-induced VEGF and play a positive role in the early stage of osteogenesis of PDLSCs.

• 대한화장품학회지
• /
• 제47권3호
• /
• pp.237-245
• /
• 2021

미세먼지와 초미세먼지는 일반적으로 사람 머리카락의 두께에 비하여 각각 1/6 ~ 1/7, 1/20 ~ 1/30 정도로 매우 작은 부유성 먼지를 뜻하며, 다양한 종류의 중금속 이온이 내포되어 있다. 호흡뿐 아니라 피부의 모공 틈새를 통해서 유입된 미세먼지는 체내 조직과 피부 건강에 문제를 유발할 수 있기 때문에 유입을 막거나 깨끗이 씻어내어 제거해야 한다. 본 연구를 통해 Oryza sativa (Rice) bran oil (OSBO, 쌀겨오일)을 이용하면 중금속 이온을 흡착하여 제거할 수 있을 것이라는 가능성을 확인하였다. 또한, 세포독성 실험을 통해 세포 생존율이 곡물 유래 성분과 비교했을 때에도 월등히 높아 외부 자극원에 대한 세포 보호 효과를 기대할 수 있다. COL1A1 mRNA의 발현량이 높아짐을 확인하였고, 이에 따라 미세먼지 속 중금속 이온에 의해 손실된 수분으로 유발될 수 있는 주름을 완화할 수 있을 것으로 사료된다. 이러한 실험 결과를 바탕으로 최종적으로 중금속 제거를 위한 워시-오프 제형의 OSBO 함유 화장품을 제시하고자 하였다.

• Restorative Dentistry and Endodontics
• /
• 제35권3호
• /
• pp.152-163
• /
• 2010

이 연구에서는 mineral trioxide aggregate (MTA)를 in vitro로 인간치수세포에 적용하였을 때 유전자들의 변화를 조사하였다. 실험군은 MTA를 teflon tube (직경 10 mm 길이 2 mm)에 담아 4시간 경화시킨 후HDPCs에 적용하였고, 대조군은 빈tube만을 적용하였다. 6, 24, 72시간 후 total RNA를 추출하여 microarray를 이용하여 분석하여, 2배 이상 또는 절반 이하의 변화를 보이는 유전자 중 선택적으로 역전사 중합효소 연쇄반응(reverse transcriptase polymerase chain reaction)을 사용하여 발현을 확인하였다. 24,546개의 유전자 중에서 109개의 유전자가 2배 이상 up-regulation되었으며(예. FOSB, THBS1, BHLHB2, EDN1,IL11, FN1, COL10A1, TUFT1) 69개의 유전자가 50%이하로 down-regulation되었다(예. SMAD6, DCN). MTA는 bio-inert한 재료라기 보다는 치수세포에 다양한 경로로 영향을 주는 재료로 사료된다. 특히 치수세포의 분화와 증식에 관여하는 유전자의 변화에 영향을 주며 석회화 과정에 관여하는 유전자의 변화에 직접적인 영향을 주리라 사료된다.