경남지역의 돼지톡소플라즈마병 감염실태 조사

김은경 ( Eun Gyeong Kim ),박호정 ( Ho Jung Park ),손병국 ( Byeong Guk Son ),정명호 ( Myeong Ho Jung ),허정호 ( Jung Ho Heo ),황보원 ( Bo Won Hwang ) 한국가축위생학회 2010 韓國家畜衛生學會誌 Vol.33 No.4

Toxoplasma gondii is a species of parasitic protozoa in the genus Toxoplasma. The definitive host of T. gondii is the cat, but the parasite can be carried by the vast majority of warm-blooded animals, including humans. It is often found in the tissues of food animals including pigs and sheep. To determine the regional prevalence of infection with T. gondii, bloods (n=300) from domestic pigs and tissues (n=200) from slaughter pigs in Gyeongnam province were tested using an enzyme-linked immunosorbent assay (ELISA) and a polymerase chain reaction (PCR) for detection of antibody and antigen. A total of 115 sero-positive pigs were identified for a prevalence rate of 38.3%. Of the 50 herds from domestic pigs tested, 34 had at least one sero-positive pig for a herd prevalence rate of 68.0%. Sero-positive rates of pigs in fattening farm were higher than that of pigs in breeding company. Sero-positive rates of sows were higher than that of growing pigs. Seasonally, sero-positive rates of pigs were highest in winter (80.0%) and lowest in spring (23.8%). According to farm size, sero-positive rates of pigs were higher in small size farms (≤2,000) than that of big size farms (>2,000). However, none of the bloods (n=300) from domestic pigs and tissues (n=200) from slaughter pigs were positive for T. gondii specific DNA by PCR.

Enzymatic Properties of Cyclodextrin Glycosyltransferase from Alkalophilic Bacillus sp. YC-335

Yong-Joon Jung(정용준),Myeong-Ho Jung(정명호),Ju-Hyun Yu(유주현) 한국식품과학회 1991 한국식품과학회지 Vol.23 No.1

Histone H3K4 Methyltransferase SET1A Stimulates the Adipogenesis of 3T3-L1 Preadipocytes

Seon Hoo Kim(김선후),Myeong Ho Jung(정명호) 한국생명과학회 2017 생명과학회지 Vol.27 No.10

히스톤 H3K4의 메칠화는 3T3-L1의 지방세포의 분화를 촉진하는 것으로 알려져 있으나, 히스톤 H3K4 메칠화 효소인 SET1A가 지방세포 분화를 조절하는지에 대해서는 보고된 바가 없다. 그러므로 본 연구에서는 SET1A의 3T3-L1 지방세포의 분화조절과 기전을 연구하였다. SET1A의 발현은 3T3-L1 지방세포 분화과정에서 증가함을 관찰하였다. 3T3-L1 지방전구세포에서 siRNA을 이용하여 SET1A의 발현을 감소시키면 3T3-L1 지방전구세포의 분화가 억제됨을 관찰하여 SET1A가 3T3-L1 지방전구세포의 분화를 촉진함을 알 수 있었다. 이에 대한 조절기전을 알기 위해, SET1A의 발현을 감소시킨 3T3-L1 지방전구세포의 세포증식을 측정한 결과, 분화 초기 단계인 분화후 2일 동안 3T3-L1 지방세포의 증식이 감소하였다. 또한 분화 후 7일 동안 지방세포세포 분화 조절인자들의 발현을 측정한 결과, SET1A의 발현을 감소시킨 3T3-L1 지방세포에서 PPARγ의 발현이 감소하였다. 위와 같은 연구결과를 바탕으로, SET1A는 분화초기단계에서는 mitotic clonal expansion 단계를 촉진하고, 분화후기단계에서는 PPARγ의 발현을 증가시켜 3T3-L1 지방세포의 분화를 촉진함을 알 수 있었다. SET1A is a histone H3K4 methyltransferase that catalyzes di- and trimethylation of histone H3 at lysine 4 (H3K4). Mono-, di-, and trimethylations on H3K4 (H3K4me1, H3K4me2, and H3K4me3, respectively) are generally correlated with gene activation. Although H3K4 methylation is associated with the stimulation of adipogenesis of 3T3-L1 preadipocytes, it remains unknown whether SET1A plays a role in the regulation of adipogenesis of 3T3-L1 preadipocytes. Here, we investigated whether SET1A regulates 3T3-L1 preadipocytes’ adipogenesis and characterized the mechanism involved in this regulation. SET1A expression increased during 3T3-L1 preadipocytes’ adipogenesis. Consistent with the increased SET1A expression, the global H3K4me3 level had also increased on day 2 after the induction of adipogenesis in 3T3-L1 adipocytes. SET1A knockdown using siRNA in 3T3-L1 preadipocytes inhibited 3T3-L1 preadipocytes’ adipogenesis, as assessed by Oil Red O staining and the expression of adipogenic genes, indicating that SET1A stimulates the adipogenesis of 3T3-L1 preadipocytes. SET1A knockdown inhibited the cell proliferation of 3T3-L1 cells during mitotic clonal expansion (MCE) via downregulation of the cell cycle gene cyclin E1, as well as the DNA synthesis gene, dihydrofolate reductase. Furthermore, SET1A knockdown repressed peroxisome proliferator-activated receptor gamma (PPARγ) expression during the late stage of adipogenesis. These results indicate that SET1A stimulates MCE and PPARγ expression, which leads to the promotion of 3T3-L1 preadipocytes’ adipogenesis.

난소절제 랫드에서 제니스테인과 콩단백질이 지질 대사에 미치는 영향

이영민(Lee Young Min),정명호(Jung Myeong Ho),이연숙(Lee Yeon Sook),송지현(Song Jihyun) 韓國營養學會 2005 Journal of Nutrition and Health Vol.38 No.4

부모의 과체중과 혈청 렙틴 농도가 한국 7세 소아의 과체중에 미치는 영향

김지혜 ( Ji Hye Kim ),정명호 ( Myeong Ho Jung ),강재헌 ( Jae Heon Kang ),송지현 ( Ji Hyun Song ) 대한지역사회영양학회 2008 대한지역사회영양학회 춘-추계학술대회지 Vol.2008 No.2

Gomisin A Ameliorates Endoplasmic Reticulum Stress-induced Hepatic Steatosis

Ye-Rang Yun(윤예랑),Myeong Ho Jung(정명호) 한국생명과학회 2017 생명과학회지 Vol.27 No.2

본 연구는 소포체스트레스(endoplasmic reticulum stress)에 의해 유발되는 지방간(hepatic steatosis)에 대한 오미자추출물(Schisandra chinensis)의 주요성분인 gomisin A의 지방간 보호 효능에 대하여 연구하였다. 이를 위해 HepG2 세포에 소포체스트레스 유도물질인 tunicamycin 또는 palmitate을 처리하여 세포에서의 지방간 모델을 만들어 실험을 진행 하였으며, 소포체스트레스 표지자(marker)인 GRP78, CHOP, XBP-1의 발현을 측정하였다. Tunicamycin 처리한 세포에서는 GRP78, CHOP, XBP-1의 발현이 증가되었으나, gomisin A를 처리 한 세포에서는 이들의 발현 증가가 억제됨을 확인하였다. 이는 palmitate를 처리한 HepG2 세포에서도 palmitate에 의해 증가하는 소포체스트레스 표지자들이 gomisin A을 처리한 세포에서 발현이 감소함을 확인하였다. 이러한 결과에 의해, gomisin A는 소포체스트레스를 억제함을 알 수 있었다. 다음으로 gomisin A가 in vivo에서 소포체스트레스 및 지방간에 대한 보호효과가 있는지 확인하기 위해, tunicamycin과 고지방(high fat diet)으로 식이 한 쥐에서 소포체스트레스와 지방간의 보호효능에 대해 실험을 진행하였다. Tunicamycin과 고지방식이을 한 쥐의 간에서 중성 지방이 증가하였으나, gomisin A를 처리한 쥐의 간에서 중성지방의 수준이 유의적으로 감소함을 확인하였다. 소포체스트레스 표지자들 역시 tunicamycin이나 고지방식이을 한 쥐에서 증가되나 gomisin A를 처리한 쥐에서 감소됨을 확인하였다. Gomisin A의 염증 반응에서의 조절기능을 확인하기 위하여 TNF-α, IL-6 그리고 MCP1과 같은 염증관련 유전자들의 발현을 분석한 결과, tunicamycin이나 고지방식이을 한 쥐에서 염증유전자들의 발현이 증가하였으나 gomisin A를 처리한 쥐에서는 유의적으로 감소하였다. 종합적으로 본 연구 결과에 의하면, gomsin A는 소포체스트레스를 억제하여 지방간의 생성을 저해함을 알 수 있었다. Previously, we have shown that Schisandra chinensis (Turcz.) Baill. (S. chinensis) has a protective effect against endoplasmic reticulum (ER) stress-induced hepatic steatosis. Gomisin A is a bioactive phytoestrogen derived from S. chinensis. In the present study, the in vitro and in vivo effects of gomisin A on ER stress and hepatic steatosis were investigated. We quantified the expression of markers of ER stress, including glucose regulated protein 78 (GRP78), C/EBP homolog protein (CHOP), and X-boxbinding protein-1 (XBP-1), in HepG2 cells treated with tunicamycin or palmitate. Tunicamycin treatment in HepG2 cells induced the expression of markers of ER stress, including GRP78, CHOP, and XBP-1c. However, treatment with gomisin A reduced the expression of markers of ER stress. These inhibitory effects were also observed in palmitate-incubated HepG2 cells. The in vivo inhibitory effects of gomisin A were assessed in mice injected with tunicamycin or fed with a high fat diet (HFD). Gomisin A reduced the expression of markers of ER stress and decreased triglyceride levels in the livers of mice after tunicamycin injection or HFD feeding. Furthermore, gomisin A decreased the expression of inflammatory genes in palmitate-incubated HepG2 cells and the liver of HFD-fed obese mice. These results suggest that gomisin A inhibits ER stress and ameliorates hepatic steatosis induced by ER stress.

난소절제와 Genistein 투여가 간 미토콘드리아 기능에 미치는 영향

이영민(Lee Young Min),정명호(Jung Myeong Ho),이연숙(Lee Yeon Sook),송지현(Song Jihyun) 韓國營養學會 2004 Journal of Nutrition and Health Vol.37 No.9

경남 북부지역 위축자돈에 대한 질병조사

김형수 ( Hyeong Su Kim ),성민호 ( Min Ho Seong ),한권식 ( Kwon Seek Han ),박정용 ( Jung Yong Park ),신유경 ( Yoo Gyeong Shin ),정명호 ( Myeong Ho Jeong ),박동엽 ( Dong Yeop Park ),고필옥 ( Phil Ok Koh ) 한국동물위생학회 2015 韓國家畜衛生學會誌 Vol.38 No.1

This study was investigated to diagnose pathogenic organisms of atrophic piglets in northern area of the Gyeongnam province, Korea. Samples such as feces, blood and necropsy specimens of 42 atrophic piglets (≤10 weeks old) were taken from May to December 2013 for this survey. Samples were examined by reverse transcriptase-polymerase chain reaction (RT-PCR) assay and bacteria isolation for detection of pathogenic agents. 93 pathogens were isolated from 42 samples can be classified into ll groups. We identified bacterial agents in 56 cases (60.2%) and viral agents in 31 cases (33.3%). However, 6 cases (6.5%) were undetected. Among these pathogens, the most prevalent disease were porcine reproductive and respiratory syndrome (PRRS) in 22 cases (23.7%). The major diseases were Colibacillosis in 15 cases (16.1%), Glasser``s disease in 12 cases (12.9%), and porcine epidemic disease (PED) in 9 cases (9.7%). Mixed infections were accounted for 77.8% of atrophic piglets. In particular, the rate of mixed infections with PRRS virus showed the highest frequency (71.4%). In addition, there is a seasonal variation. Viral pathogens were dominantly detected in winter, but in the rest of the season bacterial agents were mainly detected. Gastrointestinal diseases occurred mainly in the pre-weaning piglets, the respiratory diseases and wasting diseases occurred mainly in the post-weaning piglets.

급성 심근경색증 환자의 예후인자로서 내원 시 혈당의 유용성

승기배 ( Ki Bae Seung ),조명찬 ( Myeong Chan Cho ),박승정 ( Seung Jung Park ),김은정 ( Eun Jung Kim ),박오장 ( Oh Jang Park ),정명호 ( Myung Ho Jeong ),안영근 ( Young Keun Ahn ),김주한 ( Ju Han Kim ),김영조 ( Young Jo Kim ),채성철 대한내과학회 2010 대한내과학회지 Vol.79 No.1

Background/Aims: It has been suggested that admission hyperglycemia is associated with poor clinical outcomes in patients with acute myocardial infarction (AMI). The aim of this study was to assess the relationship between admission hyperglycemia and short-long term prognosis in patients with AMI. Methods: A total of 6,030 AMI patients without a previous history of diabetes were enrolled between Nov. 2005 and Jan. 2008. The patients were divided into three groups according to the levels of admission glucose levels: group I (<140 mg/dL, n=3,307), group II (140~199 mg/dL, n=1,946), and group III (≥200 mg/dL, n=777). In-hospital and one-year mortality were compared among three the groups. Results: The mean age was 64.3±13.3, 65.9±12.7, and 67.7±13.0 years in group I, II and III, respectively. The proportion of female gender (23.9%, 29.5%, 35.0%; p<0.001), Killip class III-IV (8.9%, 12.3%, 28.3%; p<0.001), ST-segment elevation myocardial infarction (54.6%, 71.5%, 71.7%; p<0.001), and in-hospital mortality (3.5%, 7.5%, 19.7%; p<0.001) increased with higher tertiles of elevated values of initial serum glucose. Hazard ratio (HR) for mortality rate were significantly increased in group II [HR=1.19, 95% confidential interval (Cl) 1.02~1.40, p=0.032], and in group III [HR=1.91, 95% Cl 1.59~2.30, p=0.001], compared with group I. And also significant differences were existed between group II and group III [HR =1.55, 95% Cl 1.27~1.88, p=0.001]. Conclusions: Admission glucose in patients with AMI provides incremental prognostic value, and significantly correlates with in-hospital and one-year mortalities.

레이저 제2형 당뇨동물모델에서 macelignan과 한약제 열수 추출물의 병용효과

Jiyoung Yeo(여지영),Soo-In Cho(조수인),Myeong Ho Jung(정명호) 한국생명과학회 2010 생명과학회지 Vol.20 No.7

본 연구는 macelignan과 CTH를 제2형 당뇨병동물모델에 3주간 병용 투여하여 macelignan을 단독으로 투여했을 때보다 더 나은 효과가 있는지를 살펴 보았다. Macelignan과 CTH의 병용 투여는 공복혈당과 내당능을 비롯하여 혈중 free fatty acids, HTR, 그리고 AI에서는 macelignan 단독 투여군과 비교하여 유의적으로 나타나는 큰 차이를 발견할 수는 없었다. 그러나, HbA1c, insulin 민감도, 그리고 혈중 triglyceride 함량에서는 유의적인 변화를 보이며 효과가 있는 것으로 나타났다. 따라서, macelignan의 단독 투여보다 CTH를 병용 투여하는 것이 당뇨병 합병증을 예방하거나 개선시킬 수 있는 잠재력이 있을 것으로 판단된다. 이에 보다 명확하게 검증하기 위해 혈당 및 대사조절 기전연구를 위한 further study가 진행되어야 할 것으로 사료된다. This study investigated the efficacy of macelignan and hot water with Chinese traditional herb (CTH) extract on altering severe diabetic conditions in C57BL/KsJ-db/db mice. Previously, the anti-diabetic effects of macelignan were partly reported as a PPAR α/γ-dual agonist. Here, we futher studied whether a combination of macelignan and CTH had more beneficial effects or not. The macelignan and CTH compound significantly decreased fasting blood glucose and HbA1c compared to macelignan-treated mice, and also significantly improved postprandial glucose, insulin sensitivity, and plasma lipid profiles (FFA, and TG). On the other hand, insulin levels were not significantly changed compared to the diabetic control group. There were no significant changes in the concentrations of total cholesterol and HDL-cholesterol, but there were changes in HTR and AI. These results suggest that the macelignan and CTH compound ameliorates hyperglycemia and efficiently improves postprandial glucose, insulin sensitivity, and hyperlipidemia compared with macelignan in db/db mice. Moreover, the macelignan and CTH compound seems to be more potent in affecting diabetic complications than macelignan.