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Discovery of urinary metabolomic biomarkers for early detection of acute kidney injury
Won, A Jin,Kim, Siwon,Kim, Yoon Gyoon,Kim, Kyu-Bong,Choi, Wahn Soo,Kacew, Sam,Kim, Kyeong Seok,Jung, Jee H.,Lee, Byung Mu,Kim, Suhkmann,Kim, Hyung Sik The Royal Society of Chemistry 2016 Molecular bioSystems Vol.12 No.1
<P>The discovery of new biomarkers for early detection of drug-induced acute kidney injury (AKI) is clinically important. In this study, sensitive metabolomic biomarkers identified in the urine of rats were used to detect cisplatin-induced AKI. Cisplatin (10 mg kg(-1), i.p.) was administered to Sprague-Dawley rats, which were subsequently euthanized after 1, 3 or 5 days. In cisplatin-treated rats, mild histopathological alterations were noted at day 1, and these changes were severe at days 3 and 5. Blood urea nitrogen (BUN) and serum creatinine (SCr) levels were significantly increased at days 3 and 5. The levels of new urinary protein-based biomarkers, including kidney injury molecule-1 (KIM-1), glutathione S-transferase-alpha (GST-alpha), tissue inhibitor of metalloproteinase-1 (TIMP-1), vascular endothelial growth factor (VEGF), calbindin, clusterin, neutrophil, neutrophil gelatinase-associated lipocalin (NGAL), and osteopontin, were significantly elevated at days 3 and 5. Among urinary metabolites, trigonelline and 3-indoxylsulfate (3-IS) levels were significantly decreased in urine collected from cisplatin-treated rats prior to histological kidney damage. However, carbon tetrachloride (CCl4), a hepatotoxicant, did not affect these urinary biomarkers. Trigonelline is closely associated with GSH depletion and results in insufficient antioxidant capacity against cisplatin-induced AKI. The predominant cisplatin-induced AKI marker appeared to be reduced in urinary 3-IS levels. Because 3-IS is predominantly excreted via active secretion in proximal tubules, a decrease is indicative of tubular damage. Further, urinary excretion of 3-IS levels was markedly reduced in patients with AKI compared to normal subjects. The area under the curve receiver operating characteristics (AUC-ROC) for 3-IS was higher than for SCr, BUN, lactate dehydrogenase (LDH), total protein, and glucose. Therefore, low urinary or high serum 3-IS levels may be more useful for early detection of AKI than conventional biomarkers.</P>
서울의 Penicillinase Producing Neisseria gonorrhoeae 발생빈도(1998)
김재홍,김준호,반재용,이정우,황성주,정준규,정성태,강진문,조흔정,홍창의,정혜신,이한승,김이선,이봉길,이종호,선영우,한기덕,윤성필,이성훈,안종성,박석범,문승현,조항래,김형섭,류지호,황재영,박준홍,손상욱 한양대학교 의과대학 2001 한양의대 학술지 Vol.21 No.1
In recent years, gonorrhea has been pandemic and remains one of the most common STDs in the world, especially in developing countries. For the detection of a more effective therapeutic regimen and assessing the prevalence of Penicillinase Producing Neisseria gonorrhoeae(PPNG), we have been trying to study the patients who have visited the Venereal Disease Clinic of Choong-Ku Public Health Center in Seoul since 1980 by menas of the chromogenic cephalosporin method. In 1998, 93 strians of N. genorrhoeae were isolated, among which 60(64.5%) were PPNG. The prevalence of PPNG in Seoul, which had been decreased to 39% in 1996 after a peak of 74.3% in 1993, is increased to 64.5% in 1998.
김봉오,박제석,오명철,현재석,김재하,오창경,김수현 濟州大學校工科大學産業技術硏究所 1996 尖端技術硏究所論文集 Vol.7 No.2
톳, 미역 및 다시마를 용매별로 추출하여 이들 추출물의 항돌연변이원성을 검색하였다. 톳 용매별 추출물의 MMS에 대한 항돌연변이 효과는 TA100 균주에서 헥산, 에탄올, 에칠에테르 추출물 순으로 높았고, TA102 균주에서 헥산, 에칠에테르, 에탄올 순으로 높았으나, 미역 및 다시마 추출물은 항돌연변이원성이 거의 없었다. ICR191에 대한 항돌연변이 효과는 시험된 모든 시료에 대한 에탄을 추출물이 높은 항돌연변이 효과를 나타내었고, 에칠에테르와 헥산 추출물은 물 추출물보다도 낮은 효과를 나타냈다. 그러나 톳 추출물은 시험된 모든 용매 추출물에서 60% 이상의 높은 항돌연변이 원성을 나타내어 ICR-191에 의해 유도되는 돌연변이 원성을 저해하는 물질이 수용성 및 비수용성에 걸쳐 다양함을 나타내었다. 한편, 미역, 다시마 및 톳 추출물의 sodium azide에 대한 항돌연변이원성은 없는 것으로 나타났다. Desmutagenic effects against methyl methanesulfonate(MMS)-, 2-methoxy-6-chloro-9-〔3-[2-chloroethyl〕aminopropylamino〕acridine(ICR191)- and sodium azide-induced mutations by the extracts from Hizikia fusiforme. Laminaria japonica and Undaria pinnatifida with different solvents were investigated. The solvent extracts from Hizikia fusiforme were the highest desmutagenic effect against MMS in n-hexane and against ICR191 in ethanol extract. but no against sodium azide in all solvent extracts tested. While the solvent extracts from Undaria pinnatifida and Laminaria japonica were the highest against ICR191 in ethanol extract. but no against sodium azide and MMS in all solvent extracts tested. Moreover. all the solvent extracts from Laminaria japonica were inhibited 60% or more ICR191-induced mutations.
김봉석,김경연 제주대학교 공과대학 첨단기술연구소 2003 尖端技術硏究所論文集 Vol.14 No.2
In some real physical and mechanical applications. it is not feasible to directly measure the input axcitations. In this paper, an adaptive input estimator is developed to estimate the unknown input excitations on-line recursively. Numerical examples are provided to illustrate the effectiveness of the proposed algorithm.
하윤석,김명국,유봉구 고신대학교 의과대학 2010 고신대학교 의과대학 학술지 Vol.25 No.2
Persistent trigeminal artery (PTA) is the most frequently observed fetal anastomosis between the carotid and vertebrobasilar circulations. PTA is usually associated with hypoplasia or aplasia of the vertebrobasilar artery. A 56-year-old woman presented with right hemiparesis and dysarthria. Brain MRI showed acute infarction in the right paramedian pons. CT angiogram revealed right persistent trigeminal artery and hypoplasia of the proximal basilar artery
소화성 궤양에서 삼제 병합 요법의 저용량에 의한 Helicobacter pylori 제균률과 궤양 치유효과
김예리,박봉안,이재동,이종혁,김인숙,박형석,진춘조,김상윤,박의우 건국대학교 의과학연구소 2000 건국의과학학술지 Vol.10 No.-
Helicobacter pylori is the major cause of histologic chronic gastritis and is strongly associated with peptic ulcer disease, gastric cancer and lymphoma. Several recommendations for the management of the Helicobacter pylori infection have been developed. However, there has been no clear therapeutic regimen for the optimal treatment of Helicobacter pylori infection. This study was desinged to evaluate the eradication rate and the ulcer healing rate of the triple regimen with low-dose clarithromycin(0.5g/day) in peptic ulcer patients. Forty three patients with gastric ulcer(n=15) and duodenal ulcer(n=28) were enrolled. The patients were treated either with omeprazole 20mg b.i.d. amoxicillin 0.5g b.i.d. and clarithromycin 250mg b.i.d. (low-dose regimen group, n=29) or with omeprazole 20mg b.i.d., amoxicillin 1.0g b.i.d. and clarithromycin 0.5g b.i.d.(high-dose regimen group, n= 14) for 2 weeks. After 4 weeks, the patients were evaluated for the eradication of Helicobacter pylori and the healing of ulcer. And gastritis scores according to the Sydney system were evaluated before and after 4 weeks from the end of the triple regimen. There was no significant difference in the eradication rate and the ulcer healing rate between the low-dose regimen group, group and the high-does regimen group. In the low-does regimen group, the mean initial scores of chronic inflammation and activity were decreased after the eradication of Helicobacter pylori. In conclusion, the low-dose triple regimen is as effective as the high-dose triple regimen on the eradication of Helicobacter pylori and the ulcer healing rate in peptic ulcer disease.