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Jeong MJ, Yoon YN, Kang YK, Kim CJ, Nam HS, Lee YS. A Novel Score Using Lymphocyte-to-Monocyte Ratio in Blood and Malignant Body Fluid for Predicting Prognosis of Patients with Advanced Ovarian Cancer. Cancers (Basel) 2023; 15:cancers15082328. [PMID: 37190256 DOI: 10.3390/cancers15082328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 04/11/2023] [Accepted: 04/14/2023] [Indexed: 05/17/2023] Open
Abstract
(1) Background: The lymphocyte-to-monocyte ratio (LMR), one of the systemic inflammatory markers, has been shown to be associated with prognosis of various solid tumors. However, no study has reported clinical utility of the LMR of malignant body fluid (mLMR) (2) Methods: We retrospectively analyzed clinical data of the final 92 patients of a total of 197 patients with advanced ovarian cancer newly diagnosed from November 2015 and December 2021 using our institute big data. (3) Results: Patients were divided into three groups according to their combined bLMR and mLMR scores (bmLMR score): 2, both bLMR and mLMR were elevated; 1, bLMR or mLMR was elevated; and 0, neither bLMR nor mLMR was elevated. A multivariable analysis confirmed that the histologic grade (p = 0.001), status of residual disease (p < 0.001), and bmLMR score (p < 0.001) were independent predictors of disease progression. A low combined value of bLMR and mLMR was strongly associated with a poor prognosis in patients with ovarian cancer. (4) Conclusions: Although further studies are required to apply our results clinically, this is the first study to validate the clinical value of mLMR for predicting prognosis of patients with advanced ovarian cancer.
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Affiliation(s)
- Min Jin Jeong
- Department of Obstetrics and Gynecology, Eunpyeong St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul 03312, Republic of Korea
| | - Yeo Nyeong Yoon
- Department of Obstetrics and Gynecology, Eunpyeong St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul 03312, Republic of Korea
| | - Yeon Kyung Kang
- Department of Obstetrics and Gynecology, Eunpyeong St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul 03312, Republic of Korea
| | - Chan Joo Kim
- Department of Obstetrics and Gynecology, Uijeongbu St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul 11765, Republic of Korea
| | - Hae Seong Nam
- Division of Pulmonology, Department of Internal Medicine, Inha University Hospital, Inha University School of Medicine, Incheon 22332, Republic of Korea
| | - Yong Seok Lee
- Department of Obstetrics and Gynecology, Eunpyeong St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul 03312, Republic of Korea
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Jeong MJ, Lee KE, Chae YK, Nam OH, Lee HS, Choi SC. Correlations between skeletal maturity and dental calcification stages in Korean children. Eur J Paediatr Dent 2022; 23:101-105. [PMID: 35722843 DOI: 10.23804/ejpd.2022.23.02.03] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
AIM To evaluate the relationship between dental calcification and skeletal maturity and to identify the tooth with the highest correlation with skeletal maturity index in Korean children. MATERIALS For 447 children (205 boys and 242 girls) aged between 5 and 13 years, hand-wrist and lateral cephalometric radiographs were taken to assess skeletal maturity by Fishman's skeletal maturity indicators (SMI) and Baccetti's cervical vertebrae maturation (CVM) stages. Dental panoramic radiographs were taken to assess dental maturity of the permanent mandibular canine, first and second premolar, and second molar using the method devised by Dermirjian. CONCLUSION Dental calcification stages determined by panoramic radiographs can be clinically used as useful indices to predict skeletal maturity in Korean children.
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Affiliation(s)
- M J Jeong
- Department of Pediatric Dentistry, Graduate School, Kyung Hee University, Seoul, Republic of Korea
| | - K E Lee
- Department of Pediatric Dentistry, Kyung Hee University Dental Hospital, Seoul, Republic of Korea
| | - Y K Chae
- Department of Pediatric Dentistry, Graduate School, Kyung Hee University, Seoul, Republic of Korea
| | - O H Nam
- Department of Pediatric Dentistry, Kyung Hee University Dental Hospital, Seoul, Republic of Korea
| | - H S Lee
- Department of Pediatric Dentistry, Kyung Hee University Dental Hospital, Seoul, Republic of Korea
| | - S C Choi
- Department of Pediatric Dentistry, Kyung Hee University Dental Hospital, Seoul, Republic of Korea
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Jeong MJ, Chung DJ, Park JH, Park SH, Kim CJ, Lee YS. Imaging-guided percutaneous radiofrequency ablation of retroperitoneal metastatic disease in uterine carcinosarcoma. J OBSTET GYNAECOL 2021; 41:1268-1270. [PMID: 33645390 DOI: 10.1080/01443615.2020.1863933] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Min Jin Jeong
- Department of Obstetrics and Gynecology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Dong Jin Chung
- Department of Radiology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Jung Hyun Park
- Department of Obstetrics and Gynecology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Seong Hye Park
- Department of Obstetrics and Gynecology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Chan Joo Kim
- Department of Obstetrics and Gynecology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Yong Seok Lee
- Department of Obstetrics and Gynecology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
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Song H, Jeong MJ, Cha J, Lee JS, Yoo JG, Song MJ, Kim JH, Lee SJ, Lee HN, Yoon JH, Park DC, Kim SI. Preoperative neutrophil-to-lymphocyte, platelet-to-lymphocyte and monocyte-to-lymphocyte ratio as a prognostic factor in non-endometrioid endometrial cancer. Int J Med Sci 2021; 18:3712-3717. [PMID: 34790044 PMCID: PMC8579283 DOI: 10.7150/ijms.64658] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Accepted: 09/20/2021] [Indexed: 11/05/2022] Open
Abstract
Objective: Evaluate the prognostic value of neutrophil-lymphocyte ratio (NMR), platelet-lymphocyte ratio (PLR), and monocyte-lymphocyte ratio (MLR) in patients with non-endometrioid endometrial cancer. Method: Laboratory and clinicopathological data from 118 patients with non-endometrioid endometrial cancer who underwent surgical resection between January 2010 and December 2019 were reviewed. NLR, PLR and MLR were analyzed for correlations with recurrence and survival. The receiver operating characteristic (ROC) curves were generated for the NLR, PLR, and MLR. Optimal cut-off values were determined as the points at which the Youden index (sensitivity + specificity - 1) was maximal. Based on the results of the ROC curve analysis, the patients were grouped into high MLR and low MLR groups. Recurrence rate, disease-free survival, and overall survival were compared between the two groups. The prognostic factors were investigated using univariate and multivariate Cox proportional hazards model. Results: The optimal cut-off value of MLR was 0.191 (AUC, 0.718; p < 0.001). Significantly more patients in the high MLR group experienced recurrence (60.3% vs. 15.6%, p < 0.0001) and cancer-related deaths (46.6% vs. 13.3%, p = 0.003). In multivariate analysis, advanced stage and high MLR were independent prognostic factors for disease-free survival and overall survival. Conclusion: Elevated MLR was significantly associated poor clinical outcomes in patients with non endometrioid endometrial cancer. Our findings suggest that MLR may be clinically reliable and useful as an independent prognostic marker for patients with non-endometrioid endometrial cancer.
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Affiliation(s)
- Heekyoung Song
- Department of Obstetrics and Gynecology, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Min Jin Jeong
- Department of Obstetrics and Gynecology, Eunpyeong St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Jimin Cha
- Department of Obstetrics and Gynecology, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Ji Sun Lee
- Department of Obstetrics and Gynecology, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Ji Geun Yoo
- Department of Obstetrics and Gynecology, Daejeon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Min Jong Song
- Department of Obstetrics and Gynecology, Yeouido St. Mary's hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Jin Hwi Kim
- Department of Obstetrics and Gynecology, Uijeongbu St. Mary's hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Sung Jong Lee
- Department of Obstetrics and Gynecology, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Hae Nam Lee
- Department of Obstetrics and Gynecology, Buchen St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Joo Hee Yoon
- Department of Obstetrics and Gynecology, St. Vincent's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Dong Choon Park
- Department of Obstetrics and Gynecology, St. Vincent's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Sang Il Kim
- Department of Obstetrics and Gynecology, St. Vincent's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
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Jeong MJ, Park JH, Hur SY, Kim CJ, Nam HS, Lee YS. Preoperative Neutrophil-to-Lymphocyte Ratio as a Prognostic Factor in Uterine Sarcoma. J Clin Med 2020; 9:jcm9092898. [PMID: 32911724 PMCID: PMC7564429 DOI: 10.3390/jcm9092898] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 09/04/2020] [Accepted: 09/04/2020] [Indexed: 12/16/2022] Open
Abstract
Background: Recent studies have demonstrated that the tumor microenvironment, known to be influenced by inflammatory cells, plays a crucial role in cancer progression and clinical outcome of patients. The objective of the present study was to investigate prognostic values of preoperative neutrophil-to-lymphocyte ratio (NLR) and platelet-to-lymphocyte ratio (PLR) for disease-free survival (DFS) and overall survival (OS) of uterine sarcoma patients. Methods: Ninety-nine patients with uterine sarcoma treated in eight multicenter institutions over the last 20 years were retrospectively analyzed. Curves of DFS and OS were calculated using the Kaplan–Meier method, and univariate and multivariate analyses of various prognostic factors were performed using a Cox proportional hazard regression model. Results: High NLR was significantly associated with worse DFS (p = 0.007) and OS (p = 0.039). Advanced stage (p = 0.017) and high mitotic index (p = 0.036) retained their prognostic significance for DFS. Other clinical variables, including PLR, CA125, and lactate dehydrogenase (LDH) failed to show significant impact. Conclusions: Our findings showed that an elevated preoperative NLR was associated with poor clinical outcome in uterine sarcoma patients. Our results suggest that high NLR in early-stage uterine sarcoma patients might indicate that such patients need more intensive treatments.
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Affiliation(s)
- Min Jin Jeong
- Department of Obstetrics and Gynecology, College of Medicine, The Catholic University of Korea, Seoul 03312, Korea; (M.J.J.); (J.H.P.); (S.Y.H.); (C.J.K.)
| | - Jung Hyun Park
- Department of Obstetrics and Gynecology, College of Medicine, The Catholic University of Korea, Seoul 03312, Korea; (M.J.J.); (J.H.P.); (S.Y.H.); (C.J.K.)
| | - Soo Young Hur
- Department of Obstetrics and Gynecology, College of Medicine, The Catholic University of Korea, Seoul 03312, Korea; (M.J.J.); (J.H.P.); (S.Y.H.); (C.J.K.)
| | - Chan Joo Kim
- Department of Obstetrics and Gynecology, College of Medicine, The Catholic University of Korea, Seoul 03312, Korea; (M.J.J.); (J.H.P.); (S.Y.H.); (C.J.K.)
| | - Hae Seong Nam
- Division of Pulmonology, Department of Internal Medicine, Inha University Hospital, Inha University, School of Medicine, Incheon 22332, Korea
- Correspondence: (H.S.N.); (Y.S.L.)
| | - Yong Seok Lee
- Department of Obstetrics and Gynecology, College of Medicine, The Catholic University of Korea, Seoul 03312, Korea; (M.J.J.); (J.H.P.); (S.Y.H.); (C.J.K.)
- Correspondence: (H.S.N.); (Y.S.L.)
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Wie JH, Park IY, Namkung J, Seo HW, Jeong MJ, Kwon JY. Is it appropriate for Korean women to adopt the 2009 Institute of Medicine recommendations for gestational weight gain? PLoS One 2017; 12:e0181164. [PMID: 28704550 PMCID: PMC5509309 DOI: 10.1371/journal.pone.0181164] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Accepted: 06/26/2017] [Indexed: 11/20/2022] Open
Abstract
Background The 2009 Institute of Medicine (IOM) guidelines for gestational weight gain (GWG) are intended for use among women in the United States. Little data are available on whether the 2009 IOM recommendations can be applied to Asian women. This study aimed to evaluate whether the recommendations are related to adverse pregnancy outcomes in Korean pregnant women. Methods and findings A retrospective cohort study was conducted for all singleton-pregnant women at a university hospital in Korea. After classifying the enrolled women into four Korean pre-pregnancy body mass index (BMI) categories, the risk of adverse pregnancy outcomes were analyzed for women who gained inadequate or excessive GWG based on 2009 IOM recommendations. Of 7,843 pregnancies, 64.0% of women had normal pre-pregnancy BMI and 42.7% achieved optimal GWG. Across all BMI categories, adverse pregnancies outcomes such as small for gestational age (SGA), large for gestational age (LGA), preterm birth, preeclampsia, and cesarean due to dystocia were significantly associated with GWG (all P ≤ 0.001).Women with normal BMI who gained inadequate weight were more likely to develop SGA and preterm birth and less likely to develop LGA (adjusted odds ratio (aOR) 2.21, 1.33, and 0.54, respectively). Whereas, women with normal BMI who gained excessive weight were more likely to develop LGA, preterm birth, preeclampsia, and cesarean section due to dystocia (aOR 2.10, 1.33, 1.37, and 1.37, respectively) and less likely to develop SGA (aOR 0.60). Conclusions It is tolerable for Korean women to follow recommended GWG from the 2009 IOM guidelines to decrease adverse pregnancy outcomes. This will be helpful for antenatal care on GWG not only for Korean pregnant women, but also other Asian women who have lower BMI criteria than Caucasian women.
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Affiliation(s)
- Jeong ha Wie
- Department of Obstetrics and Gynecology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - In Yang Park
- Department of Obstetrics and Gynecology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Jeong Namkung
- Department of Obstetrics and Gynecology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Hae Won Seo
- Department of Obstetrics and Gynecology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Min Jin Jeong
- Department of Obstetrics and Gynecology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Ji Young Kwon
- Department of Obstetrics and Gynecology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
- * E-mail:
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Choi YJ, Ki EY, Zhang C, Ho WCS, Lee SJ, Jeong MJ, Chan PKS, Park JS. Analysis of Sequence Variation and Risk Association of Human Papillomavirus 52 Variants Circulating in Korea. PLoS One 2016; 11:e0168178. [PMID: 27977741 PMCID: PMC5158036 DOI: 10.1371/journal.pone.0168178] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2016] [Accepted: 11/25/2016] [Indexed: 12/18/2022] Open
Abstract
Introduction Human papillomavirus (HPV) 52 is a carcinogenic, high-risk genotype frequently detected in cervical cancer cases from East Asia, including Korea. Materials and Methods Sequences of HPV52 detected in 91 cervical samples collected from women attending Seoul St. Mary’s Hospital were analyzed. HPV52 genomic sequences were obtained by polymerase chain reaction (PCR)-based sequencing and analyzed using Seq-Scape software, and phylogenetic trees were constructed using MEGA6 software. Results Of the 91 cervical samples, 40 were normal, 22 were low-grade lesions, 21 were high-grade lesions and 7 were squamous cell carcinomas. Four HPV52 variant lineages (A, B, C and D) were identified. Lineage B was the most frequently detected lineage, followed by lineage C. By analyzing the two most frequently detected lineages (B and C), we found that distinct variations existed in each lineage. We also found that a lineage B-specific mutation K93R (A379G) was associated with an increased risk of cervical neoplasia. Conclusions To our knowledge, we are the first to reveal the predominance of the HPV52 lineages, B and C, in Korea. We also found these lineages harbored distinct genetic alterations that may affect oncogenicity. Our findings increase our understanding on the heterogeneity of HPV52 variants, and may be useful for the development of new diagnostic assays and therapeutic vaccines.
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Affiliation(s)
- Youn Jin Choi
- Departments of Obstetrics and Gynecology, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Eun Young Ki
- Departments of Obstetrics and Gynecology, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Chuqing Zhang
- Department of Microbiology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Special Administrative Region, China
| | - Wendy C. S. Ho
- Department of Microbiology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Special Administrative Region, China
| | - Sung-Jong Lee
- Departments of Obstetrics and Gynecology, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Min Jin Jeong
- Departments of Obstetrics and Gynecology, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Paul K. S. Chan
- Department of Microbiology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Special Administrative Region, China
- * E-mail: (JSP); (PKC)
| | - Jong Sup Park
- Departments of Obstetrics and Gynecology, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
- * E-mail: (JSP); (PKC)
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Hong DG, Park NY, Chong GO, Cho YL, Park IS, Jeong MJ, Park JY, Lee YS. The correlation between expression of synuclein-gamma, glucose transporter-1, and survival outcomes in endometrioid endometrial carcinoma. EUR J GYNAECOL ONCOL 2013; 34:128-131. [PMID: 23781582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
PURPOSE To evaluate the correlation between immunohistochemical expression of synuclein-gamma, glucose transporter-1, and survival outcomes in endometrioid endometrial carcinoma. MATERIALS AND METHODS A tissue microarray was constructed using formalinfixed, paraffin-embedded tissue that included 23 early and 18 advanced cases. The intensity and area of the immunohistochemical reactions were evaluated using the semi-quantitative scoring system. RESULTS Synuclein-y expression was higher in the advanced stage, although it was not statistically significant (p = 0.51). Glucose transporter-1 was overexpressed in the advanced stage (p = 0.01). Synuclein-gamma (score = 0 vs > 0) and glucose transporter-1 (score < or = 7 vs > 7) did not show any differences in overall survival (p = 0.54, p = 0.48) and disease-free survival (p = 0.61, p = 0.14). CONCLUSION In this study the expression of synuclein-y and glucose transporter-1 were not considered to be a prognostic factor and were not related with survival outcomes in endometrioid endometrial carcinoma.
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Affiliation(s)
- D G Hong
- Gynecologic Cancer Center, Kyungpook National University Medical Center, Daegu, Republic of Korea
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Yoon SY, Jeong MJ, Yoo J, Lee KI, Kwon BM, Lim DS, Lee CE, Park YM, Han MY. Grb2 dominantly associates with dynamin II in human hepatocellular carcinoma HepG2 cells. J Cell Biochem 2002; 84:150-5. [PMID: 11746524 DOI: 10.1002/jcb.1275] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The two SH3 domains and one SH2 domain containing adaptor protein Grb2 is an essential element of the Ras signaling pathway in multiple systems. The SH2 domain of Grb2 recognizes and interacts with phosphotyrosine residues on activated tyrosine kinases, whereas the SH3 domains bind to several proline-rich domain-containing proteins such as Sos1. To define the difference in Grb2-associated proteins in hepatocarcinoma cells, we performed coprecipitation analysis using recombinant GST-Grb2 fusion proteins and found that several protein components (p170, p125, p100, and p80) differently associated with GST-Grb2 proteins in human Chang liver and hepatocarcinoma HepG2 cells. Sos1 and p80 proteins dominantly bind to Grb2 fusion proteins in Chang liver, whereas p100 remarkably associate with Grb2 in HepG2 cells. Also GST-Grb2 SH2 proteins exclusively bound to the p46(Shc), p52(Shc), and p66(Shc) are important adaptors of the Ras pathway in HepG2 cells. The p100 protein has been identified as dynamin II. We observed that the N-SH3 and C-SH3 domains of Grb2 fusion proteins coprecipitated with dynamin II besides Sos1. These results suggest that dynamin II may be a functional molecule involved in Grb2-mediated signaling pathway on Ras activation for tumor progression and differentiation of hepatocarcinoma cells.
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Affiliation(s)
- S Y Yoon
- Cell Biology Laboratory, Korea Research Institute of Bioscience and Biotechnology, P.O. Box 115, Yusung, Taejon 305-600, Korea
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Jeong MJ, Park SC, Byun MO. Improvement of salt tolerance in transgenic potato plants by glyceraldehyde-3 phosphate dehydrogenase gene transfer. Mol Cells 2001; 12:185-9. [PMID: 11710519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023] Open
Abstract
In the previous experiment, we isolated and characterized glyceraldehyde-3-phosphate dehydrogenase (GPD) gene of the oyster mushroom, Pleurotus sajor-caju. Expression levels of the GPD gene in the mycelia of P sajor-caju was significantly increased by exposing the mycelia to abiotic stresses, such as salt, cold, heat, and drought. We also showed that GPD confers abiotic stress resistance when introduced into yeast cells. The survival rate of the transgenic yeast cell that harbored the GPD gene was significantly higher when the yeast cells were subjected to salt, cold, heat, and drought stresses, compared with the yeast that was transformed with the pYES2 vector alone. In order to investigate the functional role of the P. sajor-caju GPD gene in higher plant cells, the complete P. sajor-caju GPD cDNA was fused into the CaMV35S promoter and then introduced into potato plants. Putative potato transformants were screened by using PCR. Twenty-one transformants were further analyzed with RT-PCR to confirm the expression of P. sajor-caju GPD. A RT-PCR Southern blot analysis revealed that 12 transgenics induced the P. sajor-caju GPD gene expression. A bioassay of these transformants revealed that the P. sajor-caju GPD gene was enough to confer salt stress resistance in the potato plant cell system. Results showed that P. sajor-caju GPD, which was continuously expressed in transgenic potato plants under normal growing conditions, resulted in improved tolerance against salt loading.
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Affiliation(s)
- M J Jeong
- Division of Molecular Genetics, National Institute of Agricultural Science and Technology, Rural Development Administration, Suwon, Korea.
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Namkung Y, Skrypnyk N, Jeong MJ, Lee T, Lee MS, Kim HL, Chin H, Suh PG, Kim SS, Shin HS. Requirement for the L-type Ca(2+) channel alpha(1D) subunit in postnatal pancreatic beta cell generation. J Clin Invest 2001; 108:1015-22. [PMID: 11581302 PMCID: PMC200955 DOI: 10.1172/jci13310] [Citation(s) in RCA: 63] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Pancreatic beta cells are the source of insulin, which directly lowers blood glucose levels in the body. Our analyses of alpha(1D) gene-knockout (alpha(1D)(-/-)) mice show that the L-type calcium channel, alpha(1D), is required for proper beta cell generation in the postnatal pancreas. Knockout mice were characteristically slightly smaller than their littermates and exhibited hypoinsulinemia and glucose intolerance. However, isolated alpha(1D)(-/-) islets persisted in glucose sensing and insulin secretion, with compensatory overexpression of another L-type channel gene, alpha(1C). Histologically, newborn alpha(1D)(-/-) mice had an equivalent number of islets to wild-type mice. In contrast, adult alpha(1D)(-/-) mice showed a decrease in the number and size of islets, compared with littermate wild-type mice due to a decrease in beta cell generation. TUNEL staining showed that there was no increase in cell death in alpha(1D)(-/-) islets, and a 5-bromo-2' deoxyuridine-labeling (BrdU-labeling) assay illustrated significant reduction in the proliferation rate of beta cells in alpha(1D)(-/-) islets.
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Affiliation(s)
- Y Namkung
- National Creative Research Initiatives Center for Calcium and Learning, Pohang University of Science and Technology, Pohang, Korea
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Kim D, Song I, Keum S, Lee T, Jeong MJ, Kim SS, McEnery MW, Shin HS. Lack of the burst firing of thalamocortical relay neurons and resistance to absence seizures in mice lacking alpha(1G) T-type Ca(2+) channels. Neuron 2001; 31:35-45. [PMID: 11498049 DOI: 10.1016/s0896-6273(01)00343-9] [Citation(s) in RCA: 420] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
T-type Ca(2+) currents have been proposed to be involved in the genesis of spike-and-wave discharges, a sign of absence seizures, but direct evidence in vivo to support this hypothesis has been lacking. To address this question, we generated a null mutation of the alpha(1G) subunit of T-type Ca(2+) channels. The thalamocortical relay neurons of the alpha(1G)-deficient mice lacked the burst mode firing of action potentials, whereas they showed the normal pattern of tonic mode firing. The alpha(1G)-deficient thalamus was specifically resistant to the generation of spike-and-wave discharges in response to GABA(B) receptor activation. Thus, the modulation of the intrinsic firing pattern mediated by alpha(1G) T-type Ca(2+) channels plays a critical role in the genesis of absence seizures in the thalamocortical pathway.
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Affiliation(s)
- D Kim
- National Creative Research Initiative Center, for Calcium and Learning, Department of Life Science, Pohang University of Science and Technology, 790-784, Pohang, South Korea.
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Yoo J, Jeong MJ, Lee SS, Lee KI, Kwon BM, Park YM, Han MY. Negative regulation of YY1 transcription factor on the dynamin I gene promoter. Biochem Biophys Res Commun 2001; 283:340-3. [PMID: 11327704 DOI: 10.1006/bbrc.2001.4784] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Dynamin I is highly expressed in brain and plays a critical role in clathrin-mediated endocytosis and synaptic vesicle recycling. To elucidate the molecular mechanism by which expression of dynamin I is tissue-specifically regulated, we previously cloned and characterized the promoter of the mouse dynamin I gene and suggested that there is a negative regulatory element in this promoter region. In the present study, we showed that YY1 binds to this negative regulatory element located at -111 to -107 by using the EMSA and supershift analyses. Cotransfection experiment using an YY1 expression vector revealed that YY1 exerts a repressive role on the dynamin I gene promoter activity. These results demonstrate that transcription factor YY1 negatively regulates dynamin I expression via binding to the negative regulatory element.
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Affiliation(s)
- J Yoo
- Cell Biology Laboratory, Korea Research Institute of Bioscience and Biotechnology, Taejon, Yusung, 305-600, Korea
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Yoo J, Jeong MJ, Lee SS, Lee KI, Kwon BM, Kim DS, Park YM, Han MY. The Neuron Restrictive Silencer Factor Can Act as an Activator for Dynamin I Gene Promoter Activity in Neuronal Cells. Biochem Biophys Res Commun 2001; 283:928-32. [PMID: 11350074 DOI: 10.1006/bbrc.2001.4857] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The neuron restrictive silencer element (NRSE) has been identified in several neuronal genes and confers neuron specificity by silencing transcription in nonneuronal cells. We have previously reported that Sp1 and an NF-kappaB-like element (NE-1) are required for the promoter activity of mouse dynamin I gene. In the present study, we found that the upstream regulatory region of the dynamin I promoter has an NRSE-like sequence and showed that neuron restrictive silencer factor (NRSF) binds to this element in neuronal cells as well as in nonneuronal cells. We also showed that NRSF activates the promoter activity of dynamin I gene in neuronal cells. From the results in this study, we suggest that NRSE might be involved in the neuron restriction of dynamin I expression, and NRSF could act as an activator for promoter activity of dynamin I gene in neuronal cells.
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Affiliation(s)
- J Yoo
- Cell Biology Laboratory, Korea Research Institute of Bioscience and Biotechnology, Yusung, Taejon, 305-600, Korea
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16
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Jeong MJ, Yoo J, Lee SS, Lee KI, Cho A, Kwon BM, Moon MJ, Park YM, Han MY. Increased GTP-binding to dynamin II does not stimulate receptor-mediated endocytosis. Biochem Biophys Res Commun 2001; 283:136-42. [PMID: 11322780 DOI: 10.1006/bbrc.2001.4681] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Regarding the molecular mechanism of dynamin in receptor-mediated endocytosis, GTPase activity of dynamin has been thought to have a critical role in endocytic vesicle internalization. However, a recent report suggested that GTP-binding to dynamin itself activates the dynamin to recruit molecular machinery necessary for endocytosis. In this study, to investigate the role of GTP binding to dynamin II, we generated two mutant dynamin II constructs: G38V and K44E. G38V, its GTP binding site might be mainly occupied by GTP caused by reduced GTPase activity, and K44E mutant, its GTP binding site might be vacant, caused by its decreased affinity for GTP and GDP. From the analysis of the ratio of GTP vs GDP bound to dynamin, we confirmed these properties. To test the effect of these mutant dynamins on endocytosis, we performed flow cytometry and confocal immunofluorescence analysis and found that these two mutants have inhibitory effect on transferrin-induced endocytosis. Whereas fluorescent transferrin was completely internalized in wild-type (WT) dynamin II expressing cells, no intracellular accumulation of fluorescent transferrin was found in the cells overexpressing K44E and G38V mutant. Interestingly, the amount of GTP bound to K44E was increased when endocytosis was induced than that bound to WT. The present results suggested that the GTPase activity of dynamin II is required for formation of endocytic vesicle and GTP-binding to dynamin II per se is not sufficient for stimulating endocytosis.
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Affiliation(s)
- M J Jeong
- Cell Biology Laboratory, Korea Research Institute of Bioscience and Biotechnology, Taejon, Yusung, 305-600, Korea
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17
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Abstract
The cardiac Na+ -Ca2+ exchanger 1 (NCX1) is thought to be the major calcium extrusion mechanism and to play an important role in the regulation of intracellular calcium in the heart. The Na+ -Ca2+ exchanger is particularly abundant in the heart, although it is found in a variety of other tissues. To investigate the role of NCX1, we have generated NCX1-deficient mice. Mice heterozygous for the NCX1 mutation showed no discernable phenotype, grew normally, and were fertile; however, no viable homozygote was observed among 175 offspring obtained from intercrosses of heterozygotes. All the homozygous mutant mice died in utero before E10.5. Morphological analysis indicated that homozygotes of NCX1 mutation at E9.5 died with an underdeveloped heart with a dilated pericardium. Microscopic analysis of these embryos showed myocardial cell loss due to apoptosis. The apoptosis was first observed in E8.5 mutant heart. Areas outside the heart appeared normal in the mutant embryos at E8.5. In contrast, at E9.0, various regions of mutant embryos showed extensive cell loss. These results suggest that mutant embryos die owing to cardiac abnormalities caused by apoptotic cell loss, indicating that NCX1 is essential for normal development of the heart.
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Affiliation(s)
- C H Cho
- Department of Life Science, Pohang University of Science and Technology, Korea
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18
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Abstract
A 1.2-kb full-length cDNA sequence of a glyceraldehyde-3-phosphate dehydrogenase (GPD) gene was isolated from the mushroom, Pleurotus sajor-caju. The full-length cDNA of the GPD gene consists of 1248 nucleotides, predicted to encode a 36-kDa polypeptide consisting of 335 amino acid residues. Sequence analysis revealed that the GPD gene has more than 72-78% amino acid sequence homology with those of other Basidiomycetes. Expression of the GPD gene increased when P. sajor-caju was treated with various abiotic stresses, such as salt, cold, heat, and drought. There was an eightfold induction by drought treatment. Salt and cold stress induced four- and twofold induction of GPD gene expression, respectively. There was also a fivefold induction by heat stress. The GPD gene exhibits different expression patterns under different stress conditions. It reached its maximum expression level within two hours under cold or heat treatment. The mRNA levels of this gene increased proportionally to increasing treatment time under salt or dry conditions. Because the expression of GPD was significantly increased, we tested whether GPD could confer abiotic stress resistance when it was introduced into yeast cells. For this, a transgenic yeast harboring P. sajor-caju GPD was generated under the control of a constitutively expressed GAL promoter. The results from biofunctional analyses with GPD yeast transformants showed that GPD yeast transformants had significantly higher resistance to cold, salt, heat, and drought stresses.
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Affiliation(s)
- M J Jeong
- Division of Molecular Genetics, National Institute of Agricultural Science and Technology, Suwon, Korea.
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Yoo J, Lee SS, Jeong MJ, Lee KI, Kwon BM, Kim SH, Park YM, Han MY. Characterization of the mouse dynamin I gene promoter and identification of sequences that direct expression in neuronal cells. Biochem J 2000; 351 Pt 3:661-8. [PMID: 11042120 PMCID: PMC1221405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
Dynamin I is expressed at high levels in brain and its expression is regulated during the developmental stages of brain. To elucidate the molecular mechanism by which the expression is tissue-specifically regulated, we cloned the 5'-flanking region of the mouse dynamin I gene and determined the nucleotide sequence of 1036 bases upstream from the translation start site. Transient transfection studies with a chloramphenicol acetyltransferase reporter gene in neuroblastoma NS20Y and Lewis lung cells demonstrated that the 5'-flanking region has a cell-type-specific promoter activity. Deletion analyses demonstrated that the minimal promoter activity was detected in the proximal region 195 bp upstream of the translation initiation codon (-90 to +105). The minimal promoter was embedded in a GC-rich region (75% GC content), in which an Sp1-binding motif and a nuclear factor (NF)-kappa B-like element (NE-1) were found, but it lacked TATA and CAAT boxes. Mutational analysis and electrophoretic mobility-shift assay analysis revealed that Sp1 binds to the Sp1 site and that this element is critical for the promoter activity of the dynamin I gene. We found that the NE-1 sequence is required for the expression of the dynamin I gene but NEBP (NE-1-binding protein), which binds to the NE-1 sequence, is not NF-kappa B. We also found that one base in the NE-1 sequence (the underlined G residue in GGGATTCGCGGA) is critical for binding specificity to discriminate between NEBP and NF-kappa B. By UV cross-linking analysis, we found that NEBP is an approx. 104 kDa nuclear protein.
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Affiliation(s)
- J Yoo
- Cell Biology Laboratory, Korea Research Institute of Bioscience and Biotechnology, P.O. Box 115, Yusung, Taejon 305-600, Korea
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Abstract
OBJECTIVE To assess the factors that might influence the success rate, safety and reliability of chorionic villus sampling (CVS) and to evaluate the relationship between CVS and other congenital anomalies. DESIGN Analysis of the outcome of 750 cases of CVS (730 cases with transcervical and 20 cases with transabdominal). SETTING The outpatient prenatal genetic clinic of a university tertiary care center. SUBJECT Seven hundred and fifty pregnant women that underwent CVS for prenatal genetic diagnosis from 7 to 12 weeks of gestation. RESULTS Advanced maternal age was the most common indication for CVS (32.8%). The overall sampling success rate was 98.0% (735/750), representing 93.9% at 7 to 8 weeks, 98.1% at 9 to 10 weeks, and 98.3% at 11 to 12 weeks of gestation. The majority of cases (93.1%) required one or two aspirations. Cytogenetic analysis routinely included direct overnight and long-term culture methods which revealed 16 abnormalities (2.2%). Of 735 cases in which CVS was successful, 700 advanced to normal offspring, 17 had therapeutic termination, and 18 resulted in spontaneous abortions; there was an overall fetal loss rate of 2.4% (18/750). CONCLUSION CVS in early pregnancy is a relatively safe and reliable method of prenatal genetic diagnosis capable of replacing genetic amniocentesis. However, it must be done by experienced personnel. No congenital anomalies were found to be related to CVS in this series.
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Affiliation(s)
- Y H Yang
- Department of Obstetrics and Gynecology, Yonsei University College of Medicine, Seoul, Korea
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