Protective Effect of Heme Oxygenase-1 on High Glucose-Induced Pancreatic β-Cell Injury

Lee, Eun-Mi,Lee, Young-Eun,Lee, Esder,Ryu, Gyeong Ryul,Ko, Seung-Hyun,Moon, Sung-Dae,Song, Ki-Ho,Ahn, Yu-Bae Korean Diabetes Association 2011 Diabetes and Metabolism Journal Vol.35 No.5

<P><B>Background</B></P><P>Glucose toxicity that is caused by chronic exposure to a high glucose concentration leads to islet dysfunction and induces apoptosis in pancreatic β-cells. Heme oxygenase-1 (HO-1) has been identified as an anti-apoptotic and cytoprotective gene. The purpose of this study is to investigate whether HO-1 up-regulation when using metalloprotophyrin (cobalt protoporphyrin, CoPP) could protect pancreatic β-cells from high glucose-induced apoptosis.</P><P><B>Methods</B></P><P>Reverse transcription-polymerase chain reaction was performed to analyze the CoPP-induced mRNA expression of HO-1. Cell viability of INS-1 cells cultured in the presence of CoPP was examined by acridine orange/propidium iodide staining. The generation of intracellular reactive oxygen species (ROS) was measured using flow cytometry. Glucose stimulated insulin secretion (GSIS) was determined following incubation with CoPP in different glucose concentrations.</P><P><B>Results</B></P><P>CoPP increased HO-1 mRNA expression in both a dose- and time-dependent manner. Overexpression of HO-1 inhibited caspase-3, and the number of dead cells in the presence of CoPP was significantly decreased when exposed to high glucose conditions (HG). CoPP also decreased the generation of intracellular ROS by 50% during 72 hours of culture with HG. However, decreased GSIS was not recovered even in the presence of CoPP.</P><P><B>Conclusion</B></P><P>Our data suggest that CoPP-induced HO-1 up-regulation results in protection from high glucose-induced apoptosis in INS-1 cells; however, glucose stimulated insulin secretion is not restored.</P>

심근 허혈-재관류 백서 모델에서 mitogen-activated protein kinase 활성화에 대한 α-lipoic acid의 효과

김연경,박은미,최준호,윤경호,유남진,이은미,김남호,정진원,김민선,박병림,오석규 圓光大學校 醫科學硏究所 2006 圓光醫科學 Vol.21 No.1

다핵균 및 단핵균으로부터 고protease 생산균주의 Screening

송상호,임현수,최명락,유은정,김성영 여수대학교 1998 論文集 Vol.13 No.2

4 multinucleate and 7 mononuclear fungi were investigated for screening of high protease productive strains. The protease activity of mononuclear strains was generally greater than that of multinucleate strains. For acid proteinase, Aspergillus awamori AOK 1007 and Asp. oryzae shoyu 2 as mononuclear strains were selected in glucose-polypeptnoe medium. For acid carboxypeptidase, two mononuclear strains were screened as Asp. awamori AOK 1007 and Asp. usamii mut. shirousami AOK 1011 in glusose-sodium glutanate medium. In this result, mononuclear fungi appeared higher protease production than that of multinuclear fungi. So, mononuclear fungi may gave many merits to improve protease activity by using of mutation or cell fusion technology.

HYPER 빔창주위의 열유동 해석에 의한 안전성 평가에 관한 연구

송민근,최진호,주은선,송태영 경상대학교 생산기술연구소 2000 生産技術硏究所論文集 Vol.16 No.-

A spent fuel problem has prevented the nuclear power from claiming to be a completely clean energy source. The nuclear transmutation technology to incinerate the long lived radioactive nuclides and produce energy during the incineration process is believed to be one or the best solutions. HYPER(Hybrid Power Extraction Reactor)is the accelerator driven transmutation system which is being developed by KAERI(Korea Atomic Energy Research Institute). Some major feature of HYPER have been developed and employed. On-power fueling concepts are employed to keep system power constant with minimum variation of accelerator power. A hollow cylinder-type metal fuel is designed for the on-line refueling concept. Lead-bismuth(Pb-Bi) is adopted as a coolant and Spallation target material. One of the issues related to the HYPER target system is the thermal and mechanical loads imposed on the Pb-Bi and the beam window. FLUENT is used for thermal-hydraulic calculation, and finally stress calculation is performed by ANSYS. A beam condition such as current is varied. The initial velocity of Pb-Bi is also varied.

자궁암세포(HeLa)에 대한 사군자탕과 수종 항암제의 병용투여 효과

은재순,김현욱,소준노,오찬호,이송재 又石大學校 1993 論文集 Vol.15 No.-

The studies were conducted to investigate the combined effects of Sa Kunja Tang(SKT) and several anti-cancer drugs. The effects of SKT and several anti-cancer drugs on the proliferation of HeLa cells, human cervical cell line, was estimated by MTT colorimetric assays. The SKT extract inhibited the proliferation of HeLa cell at 10^-4g/ml. The inhibitory action of the mitomycin C(MMC), mercaptopurine(MCP) and 5-fluorouracil(5-Fu) treated group, respectively, on the proliferation of HeLa cell was increased by the SKT. When the mice were treated by the MMC, the number of leukocyte was decreased significantly at the 1st and 3rd day, but recovered at the 7th day. In the groups of the MMC treated with the SKT, the number of leukocytes was increased significantly than the group of the MMC treated only at the 3rd day. The SKT extract decreased the thymus weight of mice. The SKT extract increased the number of plaque forming cells(PFC), but the MMC treated group decreased the number of PFC. The combined treatment of MMC and the SKT increased the number of PFC significantly than the MMC treated group. The SKT extract increased the proliferation of T cells, but the MMC treated group decreased the proliferation of T cells. The combined treatment of MMC and the SKT increased T cell proliferation significantly than the MMC treated group. In conclusion, the results presented in this paper suggest that the SKT extract can decrease the dose of anti-cancer drugs on HeLa cell, and recover the side dffects of the MMC, such as leukopenia and immunosuppresion, without any intercalating the anti-proliferative action of the MMC in vivo.

자궁경부암 선별검진을 위한 PapSure 검사에서 Spiral Brush의 유용성에 관한 연구

송언호,김어진,명나혜,박충학 대한부인종양 콜포스코피학회 2002 Journal of Gynecologic Oncology Vol.13 No.4

2001년 12월 1일부터 2002년 6월 30일까지 만 7개월 간 단국대학교의료원 산부인과 부인종양 Clinic에서 자궁경부암 선별검진을 위한 PapSure 검사를 시행한 환자 중 SpiraBrush Cx_® 검사를 실시한 33예를 대상으로 하여, 기존의 Papanicolaou 세포진 검사의 진단과 SPiraBrush Cx_®)에 의한 Papanicolaou 세포진 검사의 진단 및 최종적인 병리조직학적 진단을 비교, 분석하여 SpiraBrush Cx_®에 의한 세포진 검사가 생검에 의한 조직검사를 대체할만한 유용성이 있는지 그 여부를 조사하기 위하여 본 연구를 시행하여 다음과 같은 결과를 얻었다. 1. 환자의 연령별 분포는 21세에서 70세까지였으며 40-49세 군이 42%로 가장 많은 분포를 보였고, 평균 연령은 45.7세였다. 2. 환자의 평균 임신횟수는 3.6회였으며, 평균 출산횟수는 2.0회였다. 3. 기존의 자궁경부 세포진 검사(Conventional Papanicolaou cytology)상 진단이 음성으로 나온 경우가 19예(57.6%)였고, ASC를 포함하여 양성으로 나온 경우가 14예(42.4%)였다. 자궁경부 형광경진 검사(Speculoscopy)에서는 음성이 13예(39.4%)였고, Suspicious 진단을 포함하여 양성으로 나온 경우가 20예(60.6%)였다. SpiraBrush Cx®에 의한 세포진 검사(SpiraBrush Cx_® Papanicolaou cytology)에서는 진단이 음성인 경우가 8예(24.2%)였고, ASC를 포함하여 양성으로 나온 경우가 25예(75.8%)였다. 4. 병리조직학적 검사의 진단은 음성 12예(52.2%), 저등급 편평상피내병변(Low-grade Squamous Intraepithelial Lesion: 이하 LSIL이라 함) 2예(8.7%), 고등급 편평상피내병변(High-grade Squamous Intraepithelial lesoin: 이하 HSIL이라 함) 3예(13.0%), 편평세포암(Squamous Cell Carcinoma: 이하 SCC라 함) 6예(26.1%)였다. 5. 검사 결과의 양성판정 기준을 세포진 검사의 경우는 ASC 이상으로 하고 조직학적 검사의 경우는 LSIL이상으로 정할 경우, 기존의 Papanicolaou 세포진 검사의 민감도는 63.6%이고 특이도는 66.7%였으며, SpiraBrush Cx_®세포진 검사의 민감도는 90.9%이고 특이도는 33.3%였다. 이상의 결과로 미루어 볼 때 연구 대상의 숫자가 적어서 통계학적인 유의성은 찾을 수 없으나 SpiraBrush Cx_®가 자궁경부암 선별검진에서 생검에 의한 자궁경부의 조직학적 진단을 대체하지는 않는다고 판단된다. 그러나 기존의 Papanicolaou 세포진 검사의 민감도가 63.6%인데 반하여 SpiraBrush Cx_® 세포진 검사의 민감도는 90.9%로 훨씬 더 높았으며 이로 인해 SpiraBrush Cx_® 세포진 검사의 특이도는 33.3%로 훨씬 낮았는데 이는 매우 흥미있는 사실로서 향후 많은 Data로 더욱 연구하여 진위를 구분함이 필요하리라 사료된다. 또한 본 연구에서는 SpiraBrush Cx_® 기구의 강모들이 단단하고 날카로워서 기저막층까지의 조직과 상피층 세포들을 탈락시키면서 많은 출혈을 초래하여 슬라이드 판독에 어려움을 주었고 이는 연구 결과에 지대한 영향을 미쳤으리라고 생각되는 바, 이러한 출혈로 인한 요인을 최대한 배제하기 위하며 향후 SpiraBrush Cx_® 세포를 채취한 후 최신의 자궁경부 세포진 검사법인 ThinPrep Pap Test를 이용하거나 조직표본을 만들기 위한 Cellblock 기법을 사용하여야 한다고 판단된다. Objective : The purpose of this study was to investigate the clinical efficacy of a new stiff bristled spiral shaped brush (SpiraBrush Cx_(??))∼in) PapSure Test for cervical cancer screening, by comparing SpiraBrush Cx_(??) cytologic diagnoses with conventional Papanicolaou cytologic diagnoses and final histologic diagnoses. Methods : This study was performed in Gynecologic Oncology Clinic of Department of Obstetrics and Gynecology at Dankook University Medical Center from December I, 2001 to June 30, 2002. Thirty three cases who underwent PapSure Test (Pap cytology t Speculoscopy) were analyzed. SpiraBrush Cx_(??) Papanicolaou cytologic diagnoses were compared with conventional Papanicolaou cytologic diagnoses and histologic diagnoses as a reference standard. Results : Followings are the results summarized. 1. Age distribution was between 21 and 70. The mean age was 45.7 years. 2. The mean gravidity was 3.6 and the mean parity was 2.0. 3. There were 19 (57.6%) conventional Papanicolaou cytologic diagnoses of Negative, and 14 (42.4%) of Positive including ASC. There were 13 (39.4%) Speculoscopy diagnoses of Negative, and 20 (60.6%) of Positive including Suspicious. There were 8 (24.2%) SpiraBrush Cx_(??) cytologic diagnoses of Negative and 25 (75.8%) of Positive including ASC. 4. There were 12 (52.2%) histologic diagnoses of Negative, 2 (8.7%) of LSIL, 3 (13.0%) of HSIL, and 6 (26.1%) of SCC, according to the criteria of TBS, 2001. 5. For detecting LSIL or worse lesions, conventional Papanicolaou cytologic test yielded sensitivity of 63.6% and specificity of 66.7%. On the other hand, SpiraBrush Cx_(??) cytologic test yielded sensitivity of 90.9% and specificity of 33.3%. Conclusion : SpiraBrush Cx_(??) cytologic diagnosis does not seem to have clinical efficacy replacing the histologic diagnosis by punch biopsy in cervical cancer screening in this study. But further studies using ThinPrep Pap Test or Cellblock techniques with large data will be required and anticipated.

Effects of 17β-estradiol on colorectal cancer development after azoxymethane/dextran sulfate sodium treatment of ovariectomized mice

Song, Chin-Hee,Kim, Nayoung,Lee, Sun Min,Nam, Ryoung Hee,Choi, Soo In,Kang, So Ra,Shin, Eun,Lee, Dong Ho,Lee, Ha-Na,Surh, Young-Joon Elsevier 2019 Biochemical pharmacology Vol.164 No.-

<P><B>Abstract</B></P> <P>Estrogen is known to have a protective effect in colorectal cancer (CRC) development. Previously, we reported the anti-inflammatory and antitumorigenic effects of 17β-estradiol (E2) in azoxymethane (AOM)/dextran sulfate sodium (DSS)-treated male mice. The aim of this study was to investigate whether ovariectomy in a female AOM/DSS mouse model increases colorectal tumorigenesis and whether tumorigenesis is reduced by estrogen supplementation after ovariectomy. Clinical symptoms and histological severity of colitis and the levels of inflammatory mediators were evaluated in the colon of AOM/DSS-treated ovariectomized (OVX) mice. The levels of E2, myeloperoxidase (MPO), and NF-κB-dependent cytokines (interleukin (IL)-1β and IL-6) were measured by ELISA. Furthermore, quantitative real-time (qRT) PCR and Western blot analysis were performed. Ovariectomy did not aggravate AOM/DSS-induced colitis at 2 weeks. At weeks 10 and 16, ovariectomy significantly increased tumor number and incidence rate in only the proximal colon after AOM/DSS treatment (F_AOM/DSS vs OVX_AOM/DSS), and these increases were significantly reduced by E2 supplementation (OVX_AOM/DSS vs OVX_AOM/DSS/E2). However, ovariectomy did not affect CRC development in the distal colon (F_AOM/DSS vs OVX_AOM/DSS). At week 2, E2 administration to AOM/DSS-treated OVX mice attenuated the histological severity of colitis by decreasing the protein and/or mRNA levels of estrogen receptor alpha (ERα) and NF-κB-related mediators (i.e., COX-2, TNF-α, and IL-6) and by enhancing estrogen receptor beta (ERβ) and nuclear Nrf2 protein expression and the mRNA expression of related antioxidant enzyme genes (i.e., HO-1, GCLC, GCLM, and NQO1). Endogenous estrogen in females protects against the development of proximal colon cancer, and exogenous E2 replacement in OVX female mice showed protective effects against AOM/DSS-induced colitis and carcinogenesis. The mechanism could involve modulating ERs-, NF-κB- and Nrf2-mediated pathways.</P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

전압강하를 고려한 터널내 환기 및 방재팬의 경제적 위치선정

김은수,송중호 서울産業大學校 2005 논문집 Vol.54 No.3

우리나라 지형의 특성은 약 70%가 산으로 이루어져 있다. 이러한 지형적 여건은 교통과 관련된 사회간접 자본의 증가로 이어지며, 최근에는 산업의 발전에 힘입어 교통량의 증가와 물류비용의 절감을 목적으로 철도 및 도로의 건설시 터널의 계획 및 시공이 증가되고 있는 추세이다. 이에 따라 터널의 환경개선과 화재시 제연을 목적으로 설치되는 제트팬(Jet Fan)의 용량이 차지하는 전기적 비중이 높아지고, 전압강하에 대한 손실율이 증가되고 있다. 따라서 제트팬의 설치시 배치방법과 터널의 길이에 따른 전기실 배치를 Case 별로 분류하여 전압강하를 계산하고 분석하여 가장 효율적이며 경제적인 방안을 연구하고 정리하여 향후 설계시 기초자료를 제공하고자 하였다.

한국 성인의 경추부 추간판 높이와 깊이에 대한 연구

이상호,장의성,정승은,신송우,강호영 대한척추신경외과학회 2004 Neurospine Vol.1 No.1

Objective: Currently, normal data of cervical disc height and depth of Korean adults are not available. The objective of this study is to compile a Korean normative database of the disc height and depth of the cervical spine, valid for healthy Korean adults. Methods: All the volunteers were attached a coin on the anterior midline of the neck. From the lateral X-ray films of the cervical spine, anterior and middle disc height and anteroposterior disc depth from C2-3 to C6-7 were measured. The magnification of radiographic films as compared with real measurement of the coin was taken into consideration. Analysis of data was done by use of independent sample t-test, Pearson's correlation, and one-way analysis of variance(ANOVA). Results; A normal database for the dimensions of cervical discs was compiled from 42 lateral views of healthy Korean adults. There were 20 males(mean age, 29,6 years; mean height, 174.3 cm) and 22 females(mean age, 27,4 years; mean height, 161.2 cm). The means of anterior height, middle height and anteroposterlor depth of cervical disc space were 4.09mm, 5,82mm, and 16,86mm for men and 3,40 mm, 5.30 mm, and 14.86 mm for women, respectively, The height of C4-5 disc space was highest at the middle disc space from C2-3 to C6-7. Conclusion: This study will contribute to the clinical diagnosis, treatment and development of instruments of cervical disc diseases for Korean patients with cervical disc diseases.

위 전절제술을 받았던 환자에서 아급성 연합성 변성 1예

한정호,하현욱,이정석,송은향,김우정,김두응,최진영 건국대학교 의과학연구소 2000 건국의과학학술지 Vol.10 No.-

Subacute combined degeneration is a metabolic disorder of the spinal cord caused by vitamin B12 deficiency. A 72-year old man was admitted with weakness and tingling sensation of the bosh upper extremities. 9 years ago, he was diagnosed as having stomach cancer. So total gastrectomy with splenectomy was done at that time. The complete blood cell counts and morphology revealed megaloblastic anemia. Nerve conduction velocity study(NCV), electoromyography(EMG) and somatosensory evoked potentials(SEP) showed diffuse sensorimotor peripheral neuropathy. Magnetic resonance imaging(MRI) showed an increased T2-weighted signal, mild decreased T1-weighted signal, and slight contrast enhancement of the posterior columns of the cord in the cervical and upper thoracic spinal region. He was treated with vitamin B12 supplements and improved gradually. If abnormal sensation and muscle weakness was developed after gastrointestinal surgery, subacute combined degeneration should be considered in the differential diagnosis. We describe MRI findings of a typical case of subacute combined degeneration, which was induced by total gastrectomy.