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박시형,김관수 한국응용생명화학회 2004 Journal of Applied Biological Chemistry (J. Appl. Vol.47 No.1
Two flavonoids were isolated from the aerial parts of Salicornia herbacea L. by column chromatography. The structures of the flavonoid compound 1 and 2 were identified as quercetin 3-O-β-D-glucopyranoside and isorhamnetin 3-O-β-D-glucopyranoside, respectively. The antioxidant activity of compound 1 was similar to those of quercetin and rutin, and the activity of compound 2, which contained methoxyl group at flavonoid B-ring, was lower than that of compound 1. The two compounds 1 and 2 were the first to be reported in this plant.
Aspergillus sp. F184가 생산하는 Xanthine Oxidase 저해제에 관한 연구
박시형,윤상웅,박정민,옥승호,유주현,배동훈 한국산업미생물학회 2000 한국미생물·생명공학회지 Vol.28 No.2
통풍과 oxygen free radical의 독성에 관여하는 xanthine oxidase에 대한 새로운 저해물질의 탐색 및 개발을 목적으로 본 연구에서 선택분리한 Aspergillus sp. F184가 생산하는 저해물질을 분리·정제하고 구조를 결정하였으며 효소저해활성을 조사하였다. 본 균주를 배양 후 배양액을 여과하여 균체와 배양액을 분리하고 균체를 acetone으로 추출하고 감압농축하고 남은 수용액층을 배양액과 합쳐 HP-20 adsorption column chromatography, ethyl acetate추출, silica gel column chromatography, 결정화 등을 실시하여 xanthine oxidase에 대한 저해물질을 분리, 정제하였다. 본 저해물질의 구조를 NMR 및 MS 스펙트럼을 측정하여 분석한 결과 5,6-epoxy-2-hydroxy-3-methyl-2-cyclohexene-1,4-dione으로서 terreic acid로 동정되었다. Terreic acid의 xanthine oxidase에 대한 저해활성을 조사한 결과 IC_50가 1.1×10 exp (-7) M로서 기존의 저해제인 allopurinol과 유사하였다. 이에 terreic acid에 의한 xanthine oxidase 저해활성은 보고된 바가 없기에 새로운 통풍치료제로서의 가능성이 있음을 보고한다. Aspergillus sp. F184 was isolated from soil for the development of new xanthine oxidase inhibitor. This xanthine oxidase inhibitor was sequentially purified by filtration, HP-20 adsorption column chromatography, ethyl acetate extraction, silica gel column chromatography and crystallization, and was named as YUX 104. YUX 104 was identified to be 5,6-epoxy-2-hydroxy-3-methyl-2-cyclohexene-1,4-dione(terreic acid) by NMR and mass spectroscopic sudies.
박시형 한국공업화학회 2017 한국공업화학회 연구논문 초록집 Vol.2017 No.1
SF6-filled microbubbles were prepared by emulsion and solventevaporation method. The prepared MBs were further conjugated with doxorubicin-loaded nano-sized liposome and peptide ligands to interleukin-4 receptor for targeting brain tumor cells. The final MB-Lipo (Dox)-IL4RTP had a spherical structure with the mean size of 1,500 nm. The MB-Lipo (Dox)IL4RTP exhibited cellular uptake in U87MG brain tumor cells with frequency ultrasound energy suggesting that MB-Lipo (Dox)IL4RTP provided effective targeting ability for brain tumor cells. In addition, WST-1 assay results showed that MB-Lipo (Dox)IL4RTP inhibited the proliferation of U87MG cells IL4Rdependently. This was confirmed by western blotting of γH2AX, phospho (Ser15)-p53, p53 and p21 which are signal transduction proteins involved in DNA damage response and cell cycle arrest.
관상동맥 성형술 시행한 환자에서 Clopidogrel과 관련된 용혈성 요독증후군
박시형,박진한,박상율,이은지,전현수,김영훈,김양욱 대한내과학회 2011 대한내과학회지 Vol.80 No.-
Thienopyridines are antiplatelet agents used in post-percutaneous coronary angioplasty patients and patients with acute coronary syndrome, stroke, and peripheral arterial disease. Ticlopidine has been shown to reduce the incidence of stent thrombosis, but it may also cause serious hematological side effects. Among the thienopyridines, clopidogrel is considered to be a safe alternative to ticlopidine because of its decreased incidence of hematological adverse effects. However, some hematological side effects can occur and may be fatal. In this case, a 47-year-old man complained of dyspnea and generalized edema. He had been taking clopidogrel after coronary angioplasty. His laboratory findings showed acute renal failure, microangiopathic hemolytic anemia, and thrombocytopenia, which were consistent with hemolytic uremic syndrome (HUS). After discontinuing clopidogrel and undergoing plasma exchange, he recovered fully. To our knowledge, this is the first reported case of clopidogrel-induced HUS in Korea. (Korean J Med 2011;80:S253-S257) Clopidogrel은 항혈소판제로 여러 임상영역에서 사용된다. 기존의 약제보다 부작용도 적어 안전하게 널리 쓸 수 있는 이 약제가 드물게는 이와 같은 심각한 합병증을 유발할 수 있다. 이에 우리는 이러한 합병증을 이해하고 주의 해야 한다. 저자들은 급성 관상동맥 증후군이 있었던 47세 남자 환자에서 이와 같은 합병증을 경험하였고, 약물 중단 및 치료적 혈장분리술 등으로 호전되었던 증례를 1예 경험하였기에 문헌고찰과 함께 보고하는 바이다.
Flavonoids from the Stems of Eastern Picklypear Opuntia humifusa, Cactaceae
박시형,김휘,류동영 한국응용생명화학회 2007 Journal of Applied Biological Chemistry (J. Appl. Vol.50 No.4
Five flavonoids, isorhamnetin 3- O - β - D -galactosyl-4'- O - β - D -glucoside (1), isorhamnetin 3,4'-di- O - β D -glucoside (2), isorhamnetin 3- O - β - D -(6- O - α - L -rhamnosyl)glucosyl-4'- O - β - D -glucoside (3), isorhamnetin 3- O - β - D -(6- O - α - L -rhamnosyl)glucoside (4), and isorhamnetin 3- O - β - D -(6- O - α - L -rhamnosyl) galactoside (5) were isolated from the stems of Opuntia humifusa (Raf.) Raf. and their structures were identified based on LC-MS and NMR data.