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Kim H, Yoon S, Yun Y, Hur M, Moon H. M222 Evaluation of commutability of external quality assessment material for accuracy based survey of lipid tests. Clin Chim Acta 2022. [DOI: 10.1016/j.cca.2022.04.410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Kim H, Hur M, Kim S, Moon H, Yun Y. T248 Reference intervals for 10 platelet parameters on Mindray BC-6800 plus hematology analyzer. Clin Chim Acta 2022. [DOI: 10.1016/j.cca.2022.04.736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Yoon S, Moon H, Yi A, Kim H, Chung H, Hur M, Yun Y, Yoo G. W071 Investigation of serial tests of quantiferon-tb gold in-tube and quantiferon-tb gold-plus in contacts to patients with active tuberculosis. Clin Chim Acta 2022. [DOI: 10.1016/j.cca.2022.04.809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Yuan Y, Yun Y, Lei L, Junsheng N, Weiping Z. Efficacy and safety of sorafenib following hepatic resection in patients with hepatocellular carcinoma: A meta-analysis. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz422.063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Li T, Vergalasova I, Wang C, Sheng Y, Yun Y, Liu H, Shi W, Alonso-Basanta M, Dong L. Significant Inter-Planner Variability in Plan Quality for VMAT-Based Multi-Target Stereotactic Radiosurgery (SRS): A Multi-Institution Analysis. Int J Radiat Oncol Biol Phys 2019. [DOI: 10.1016/j.ijrobp.2019.06.807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Kim JK, Kim DJ, Yun Y. Natural history and factors associated with ulnar-sided wrist pain in distal radial fractures treated by plate fixation. J Hand Surg Eur Vol 2016; 41:727-31. [PMID: 26896455 DOI: 10.1177/1753193416630525] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Accepted: 01/04/2016] [Indexed: 02/03/2023]
Abstract
UNLABELLED We documented longitudinal changes in the incidence of ulnar-sided wrist pain after distal radial fractures treated by plate fixation and identified factors associated with ulnar-sided wrist pain. A total of 140 patients were enrolled in this study. Radiographs were taken 3 months after operation, and were used to measure radial inclination, anterior angulation and ulnar variance, and to identify the presence of an ulnar styloid fracture. Clinical assessments at the same time included grip strengths, ranges of wrist motion and the patient-rated wrist evaluation questionnaire. The presence of ulnar-sided wrist pain was noted at each follow-up visit. The incidence of ulnar-sided wrist pain decreased significantly with time after surgery (22 patients at 3 months, 11 patients at 6 months and three patients at 12 months). The mean age, sex, the presence of an ulnar styloid fracture and the classification of the distal radial fracture were not factors that were associated with a higher incidence of ulnar-sided wrist pain, but there was an association between higher patient-rated wrist evaluation scores and the presence of ulnar-sided wrist pain. LEVEL OF EVIDENCE Prognosis, Level IV.
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Affiliation(s)
- J K Kim
- Department of Orthopedic Surgery, Ewha Womans Universtiy Mokdong Hospital, Seoul, Korea
| | - D J Kim
- Department of Orthopedic Surgery, Ewha Womans Universtiy Mokdong Hospital, Seoul, Korea
| | - Y Yun
- Department of Orthopedic Surgery, Ewha Womans Universtiy Mokdong Hospital, Seoul, Korea
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Hanguang H, Hang Z, Weiting G, Xiyong L, Jiaping P, Shujing Y, Yun Y, Shu Z. Abstract B20: Secreted Protein Acidic and Rich in Cysteines-Like 1 Suppresses Aggressiveness and Predicts Better Survival in Colorectal Cancers. Cancer Prev Res (Phila) 2012. [DOI: 10.1158/1940-6207.prev-12-b20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Secreted protein acidic and rich in cysteines-like 1 (SPARCL1) is an extracellular matrix glycoprotein with malignancy suppressing potential. The hypothesis that SPARCL1 reduces cancer invasiveness and predicts better survival in colorectal cancers (CRC) was investigated.
Material and Methods: Stable SPARCL1 transfectants, RKO-SPRCL1, and corresponding vector control were constructed and implanted into nude mice to generate a mouse xenograft model of liver metastasis. Also, a retrospective outcome study was conducted on the COH set (222 CRCs) and ZJU set (412 CRCs). The protein expression level of SPARCL1 was determined by immunohistochemistry. The Kaplan-Meier and COX analyses were employed for survival analysis. The association of SPARCL1 with MET was sought by RT-PCR and Western blot analysis.
Results: The ectopic expression of SPARCL1 significantly reduced the potential for anchorage-independent growth, migration and invasion, and it induced cell differentiation in RKO and SW620 cells. In mouse xenograft model, the expression of SPARCL1 significantly reduced the liver metastasis (P = 0.001). The patient-based studies revealed that the expression of SPARCL1 was related to better differentiation (P < 0.01), less lymph node involvement (Odds Ratio, OR=0.67, 95% CI 0.45-1.00) and less distant metastasis (OR=0.38, 95% CI 0.18-0.79). The Kaplan-Meier and COX analysis demonstrated that the expression of SPARCL1 was associated with better overall survival (Log–rank P < 0.01; hazard ratio, HR=0.57, 95% CI 0.39-0.84). Transfection of SPARCL1 induced MET of colon cancer cells.
Conclusion: SPARCL1 functions as a tumor suppressor promoting differentiation possibly via MET, which inhibits the aggressiveness of CRC.
Citation Format: Hu Hanguang, Zhang Hang, Ge Weiting, Liu Xiyong, Peng Jiaping, Yu Shujing, Yen Yun, Zheng Shu. Secreted protein acidic and rich in cysteines-like 1 suppresses aggressiveness and predicts better survival in colorectal cancers. [abstract]. In: Proceedings of the Eleventh Annual AACR International Conference on Frontiers in Cancer Prevention Research; 2012 Oct 16-19; Anaheim, CA. Philadelphia (PA): AACR; Cancer Prev Res 2012;5(11 Suppl):Abstract nr B20.
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Affiliation(s)
- Hu Hanguang
- 1Cancer Institute, Zhejiang University, Hangzhou, Zhejiang, China, 2City of Hope National Medical Center, Duarte, CA
| | - Zhang Hang
- 1Cancer Institute, Zhejiang University, Hangzhou, Zhejiang, China, 2City of Hope National Medical Center, Duarte, CA
| | - Ge Weiting
- 1Cancer Institute, Zhejiang University, Hangzhou, Zhejiang, China, 2City of Hope National Medical Center, Duarte, CA
| | - Liu Xiyong
- 1Cancer Institute, Zhejiang University, Hangzhou, Zhejiang, China, 2City of Hope National Medical Center, Duarte, CA
| | - Peng Jiaping
- 1Cancer Institute, Zhejiang University, Hangzhou, Zhejiang, China, 2City of Hope National Medical Center, Duarte, CA
| | - Yu Shujing
- 1Cancer Institute, Zhejiang University, Hangzhou, Zhejiang, China, 2City of Hope National Medical Center, Duarte, CA
| | - Yen Yun
- 1Cancer Institute, Zhejiang University, Hangzhou, Zhejiang, China, 2City of Hope National Medical Center, Duarte, CA
| | - Zheng Shu
- 1Cancer Institute, Zhejiang University, Hangzhou, Zhejiang, China, 2City of Hope National Medical Center, Duarte, CA
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Liu W, Yin J, Zhao G, Yun Y, Wu S, Jones K, Lei A. Differential regulation of cyclin B1 degradation between the first and second meiotic divisions of bovine oocytes. Theriogenology 2012; 78:1171-81.e1. [DOI: 10.1016/j.theriogenology.2012.06.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2011] [Revised: 06/04/2012] [Accepted: 06/05/2012] [Indexed: 11/28/2022]
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Hovmöller S, Zou X, Yun Y, Wei W, Rabbani F. Solving structures of sub-micron crystals by rotation electron diffraction. Acta Crystallogr A 2012. [DOI: 10.1107/s0108767312098856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Ryu J, Yun Y, Choi B. P04.12. Medical practices and attitudes of dual medical license holders in Korea. BMC Complement Altern Med 2012. [PMCID: PMC3373693 DOI: 10.1186/1472-6882-12-s1-p282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Ryu J, Yun Y, Lim B. P04.63. The consciousness of medical doctors about collaborative practice of Western medicine and traditional Korean medicine. Altern Ther Health Med 2012. [PMCID: PMC3373801 DOI: 10.1186/1472-6882-12-s1-p333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Son B, Yun Y, Choi I. P02.14. Efficacy of ah shi point acupuncture on acne vulgaris. BMC Complement Altern Med 2012. [PMCID: PMC3373790 DOI: 10.1186/1472-6882-12-s1-p70] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
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Kim MK, Lee M, Shin C, Baik I, Yun Y, Okubo H, Sasaki S. P2-140 Dietary patterns and risk of metabolic syndrome among Korean population: the Korean national health and nutrition examination survey, 2007-2009. Br J Soc Med 2011. [DOI: 10.1136/jech.2011.142976i.75] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Tiemann K, Alluin JV, Honegger A, Chomchan P, Gaur S, Yun Y, Forman SJ, Rossi JJ, Chen RW. Small interfering RNAs targeting cyclin D1 and cyclin D2 enhance the cytotoxicity of chemotherapeutic agents in mantle cell lymphoma cell lines. Leuk Lymphoma 2011; 52:2148-54. [PMID: 21745168 DOI: 10.3109/10428194.2011.593272] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Cyclin D1 (CCND1) is a known cell cycle regulator whose overexpression is a hallmark of mantle cell lymphoma (MCL). Although molecular techniques have unified the diagnostic approach to MCL, no therapeutic advances have been made to target this particular pathway. The significance of CCND1 in the pathogenesis and treatment of MCL has yet to be defined. We have taken advantage of RNA interference (RNAi) to down-regulate CCND1 expression in two MCL cell lines (Granta-519 and Jeko-1) to investigate the cytotoxic effect of combining RNAi with conventional chemotherapeutic agents. We designed four small interfering RNAs (siRNAs) specific to CCND1, one specific to CCND2, and one dual-targeting siRNA that simultaneously down-regulates CCND1 and CCND2. Etoposide and doxorubicin were used as chemotherapeutics in combination with the siRNAs. The transfected siRNAs in MCL cell lines triggered 40-60% reduction in target mRNA and protein levels. Importantly, the siRNA-mediated reduction in cyclins resulted in decreased IC(50) (50% inhibitory concentration) values for both doxorubicin and etoposide. The combination of siRNA-mediated inhibition of the cyclins along with chemotherapeutic agents could potentially be used to lower the effective doses of the chemotherapeutic agents and reduce drug-related toxicities.
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Affiliation(s)
- Katrin Tiemann
- Division of Molecular and Cellular Biology, Beckman Research Institute of City of Hope, Duarte, CA 91010, USA
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Lee E, An S, Cho SA, Yun Y, Han J, Hwang YK, Kim HK, Lee TR. The influence of alkane chain length on the skin irritation potential of 1,2-alkanediols. Int J Cosmet Sci 2011; 33:421-5. [DOI: 10.1111/j.1468-2494.2011.00646.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Yun Y, Peng Y, Liu FX, Lei C. Wolbachia screening in spiders and assessment of horizontal transmission between predator and prey. Neotrop Entomol 2011; 40:164-169. [PMID: 21584395] [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] [Received: 12/10/2009] [Accepted: 10/11/2010] [Indexed: 05/30/2023]
Abstract
Recent studies have revealed that the prevalence of Wolbachia in arthropods is attributable not only to its vertical transmission, but also to its horizontal transfer. In order to assess the horizontal transmission of Wolbachia between predator and prey, arthropods belonging to 11 spider families and six insect families were collected in the same field of rice. The distribution of Wolbachia in these arthropods was detected by diagnostic PCR amplification of the wsp (Wolbachia outer surface protein gene) and 16S rDNA genes. Nurscia albofasciata Strand (Araneae: Titanoecidae), Propylea japonica Thunberg (Coleoptera: Coccinellidae), Paederus fuscipes Curtis (Coleoptera: Staphylinidae), and Nilaparvata lugens Stal (Homoptera: Delphacidae) were infected with Wolbachia. This is the first report of infection of N. albofasciata and P. fuscipes by Wolbachia. No direct evidence indicated the existence of horizontal transmission of Wolbachia between predator and prey.
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Affiliation(s)
- Y Yun
- College of Life Science, Hubei University, Wuhan, China
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Kim E, Cheong HS, Bae JS, Chun J, Park TJ, Lee K, Yun Y, Shin HD. Identification of genetic polymorphisms in bovine mitochondrial deoxyribonucleic acid. J Anim Sci 2010; 88:2551-5. [PMID: 20418455 DOI: 10.2527/jas.2009-2235] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
In this study, the intent was to identify genetic polymorphisms of mitochondrial (mt) DNA in Korean cattle (Bos taurus coreana) and to analyze the genetic relationship between Korean cattle and other breeds. Whole mtDNA genomes (16,338 bp) of 26 animals (16 Korean cattle and 10 Holsteins) were directly sequenced. Multiple alignments, including 26 whole-mtDNA sequences obtained by direct sequencing and 10 mtDNA sequences from a public database (National Center for Biotechnology Information), revealed 393 mtDNA polymorphisms (382 SNP, 3 heteroplasmies, and 8 insertion-deletion polymorphisms). Estimated gene diversity of mtDNA was 0.00198 among these 36 animals. Phylogenic analysis with mtDNA polymorphisms revealed a distinct genetic difference between Bos taurus (Korean, Japanese Black, Holstein, and Fleckvieh breeds) and Bos indicus (Nellore and Zwergzebu breeds). The genetic information regarding mtDNA polymorphisms identified in this study would be useful for further investigation of mtDNA in other breeds.
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Affiliation(s)
- E Kim
- Department of Veterinary Medicine, Graduate School, Cheju National University, Cheju, Korea, 153-801
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Lee E, Min S, Jung S, Kown Y, Kang H, Yun Y, Lee S. 272 Oncologic safety and QoL of immediate latissimus dorsi myocutanous flap. EJC Suppl 2010. [DOI: 10.1016/s1359-6349(10)70298-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Yun Y, Duan W, Chen P, Wu H, Shen Z, Qian Z, Wang D. Down-Regulation of Cyclooxygenase-2 is Involved in Ischemic Postconditioning Protection Against Renal Ischemia Reperfusion Injury in Rats. Transplant Proc 2009; 41:3585-9. [DOI: 10.1016/j.transproceed.2009.06.209] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2009] [Revised: 03/07/2009] [Accepted: 06/01/2009] [Indexed: 10/20/2022]
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Yun Y, Duan W, Chen P, Wu H, Shen Z, Qian Z, Wang D. Ischemic Postconditioning Modified Renal Oxidative Stress and Lipid Peroxidation Caused By Ischemic Reperfusion Injury in Rats. Transplant Proc 2009; 41:3597-602. [DOI: 10.1016/j.transproceed.2009.06.203] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2009] [Revised: 04/14/2009] [Accepted: 06/01/2009] [Indexed: 10/20/2022]
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Choi S, Hong Y, Cho H, Yun Y, Kim J, Moon S, Han C, Shin J, Kim S, Cho Y. 296: Early Treatment of Hypertonic Saline and Arginine Is Important in Restoration of T Cell Dysfunction. Ann Emerg Med 2009. [DOI: 10.1016/j.annemergmed.2009.06.326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Kim S, Lee J, Yun Y, Kim S, Kim S, Do Y, Ro J, Park S, Jeong H, Kang J. Employment status and work-related difficulties in family caregivers of terminal cancer patients compared with the general population. J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.9580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
9580 Background: This study was aimed to investigate the employment status and work-related difficulties among family caregiver of terminal cancer patients compared with the general population. Methods: A survey was administered to 381 family caregivers of terminal cancer patients at 11hospitals and 994 general populations aged more than 18 years. Results: Family caregivers of terminal cancer patients were female (66.7%) and the patient's spouse (50.9%), with mean age of 46.8years (SD, 13.5). 212(56.1%) were working before cancer diagnosis, however, only 133(36.3%) continued working currently. Compared with the general population, 233(63.7%)family caregivers of terminal cancer patients were more likely to be not working (adjusted odds ratio [aOR] =2.39; 95% confidence interval [95%CI] = 1.73 to 3.29).Those who continued working reported more easy fatigability (40.6% vs 22.4%) and reduced working hours (20.3% vs 2.1%) than general population. For those doing housework, caregiving itself (56.4%) were identified to be the most common difficulties, followed by easy fatigability (32.3%). Major reasons for not working were providing care to the terminal cancer patients (24.0%). Older age (aOR=10.37; 95%CI=2.80 to 38.41), female sex (aOR=4.28; 95%CI=2.25 to 8.13), lower household income (aOR=2.19; 95%CI=1.19 to 4.06), bearing medical cost by other than spouse (aOR=2.10; 95%CI=1.05 to 4.19), and low performance status of the patients (aOR=2.00; 95%CI=1.01 to 3.95) were significantly associated with not working. Conclusions: When compared to the general population, family caregivers of terminal cancer patients were at risk job loss from their caregiving burden, and caregiving and easy fatigability were the major work-related difficulties. Our study might help make a strategy to reduce job loss for family caregivers' caregiving burden. No significant financial relationships to disclose.
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Affiliation(s)
- S. Kim
- Fatima Hospital, Daegu South, Republic of Korea; National Cancer Center, Ilsandong-gu, Republic of Korea; Department of Internal Medicine College of Medicine, Daegu, Republic of Korea; Kyunghee University Hospital, Seoul, Republic of Korea; Dongsan Medical Center, Keimyung University School, Daegu, Republic of Korea; Good Samaritan Hospital, Pohang-si, Republic of Korea; College of Medicine, Gyeongsang National University, Jinju, Republic of Korea
| | - J. Lee
- Fatima Hospital, Daegu South, Republic of Korea; National Cancer Center, Ilsandong-gu, Republic of Korea; Department of Internal Medicine College of Medicine, Daegu, Republic of Korea; Kyunghee University Hospital, Seoul, Republic of Korea; Dongsan Medical Center, Keimyung University School, Daegu, Republic of Korea; Good Samaritan Hospital, Pohang-si, Republic of Korea; College of Medicine, Gyeongsang National University, Jinju, Republic of Korea
| | - Y. Yun
- Fatima Hospital, Daegu South, Republic of Korea; National Cancer Center, Ilsandong-gu, Republic of Korea; Department of Internal Medicine College of Medicine, Daegu, Republic of Korea; Kyunghee University Hospital, Seoul, Republic of Korea; Dongsan Medical Center, Keimyung University School, Daegu, Republic of Korea; Good Samaritan Hospital, Pohang-si, Republic of Korea; College of Medicine, Gyeongsang National University, Jinju, Republic of Korea
| | - S. Kim
- Fatima Hospital, Daegu South, Republic of Korea; National Cancer Center, Ilsandong-gu, Republic of Korea; Department of Internal Medicine College of Medicine, Daegu, Republic of Korea; Kyunghee University Hospital, Seoul, Republic of Korea; Dongsan Medical Center, Keimyung University School, Daegu, Republic of Korea; Good Samaritan Hospital, Pohang-si, Republic of Korea; College of Medicine, Gyeongsang National University, Jinju, Republic of Korea
| | - S. Kim
- Fatima Hospital, Daegu South, Republic of Korea; National Cancer Center, Ilsandong-gu, Republic of Korea; Department of Internal Medicine College of Medicine, Daegu, Republic of Korea; Kyunghee University Hospital, Seoul, Republic of Korea; Dongsan Medical Center, Keimyung University School, Daegu, Republic of Korea; Good Samaritan Hospital, Pohang-si, Republic of Korea; College of Medicine, Gyeongsang National University, Jinju, Republic of Korea
| | - Y. Do
- Fatima Hospital, Daegu South, Republic of Korea; National Cancer Center, Ilsandong-gu, Republic of Korea; Department of Internal Medicine College of Medicine, Daegu, Republic of Korea; Kyunghee University Hospital, Seoul, Republic of Korea; Dongsan Medical Center, Keimyung University School, Daegu, Republic of Korea; Good Samaritan Hospital, Pohang-si, Republic of Korea; College of Medicine, Gyeongsang National University, Jinju, Republic of Korea
| | - J. Ro
- Fatima Hospital, Daegu South, Republic of Korea; National Cancer Center, Ilsandong-gu, Republic of Korea; Department of Internal Medicine College of Medicine, Daegu, Republic of Korea; Kyunghee University Hospital, Seoul, Republic of Korea; Dongsan Medical Center, Keimyung University School, Daegu, Republic of Korea; Good Samaritan Hospital, Pohang-si, Republic of Korea; College of Medicine, Gyeongsang National University, Jinju, Republic of Korea
| | - S. Park
- Fatima Hospital, Daegu South, Republic of Korea; National Cancer Center, Ilsandong-gu, Republic of Korea; Department of Internal Medicine College of Medicine, Daegu, Republic of Korea; Kyunghee University Hospital, Seoul, Republic of Korea; Dongsan Medical Center, Keimyung University School, Daegu, Republic of Korea; Good Samaritan Hospital, Pohang-si, Republic of Korea; College of Medicine, Gyeongsang National University, Jinju, Republic of Korea
| | - H. Jeong
- Fatima Hospital, Daegu South, Republic of Korea; National Cancer Center, Ilsandong-gu, Republic of Korea; Department of Internal Medicine College of Medicine, Daegu, Republic of Korea; Kyunghee University Hospital, Seoul, Republic of Korea; Dongsan Medical Center, Keimyung University School, Daegu, Republic of Korea; Good Samaritan Hospital, Pohang-si, Republic of Korea; College of Medicine, Gyeongsang National University, Jinju, Republic of Korea
| | - J. Kang
- Fatima Hospital, Daegu South, Republic of Korea; National Cancer Center, Ilsandong-gu, Republic of Korea; Department of Internal Medicine College of Medicine, Daegu, Republic of Korea; Kyunghee University Hospital, Seoul, Republic of Korea; Dongsan Medical Center, Keimyung University School, Daegu, Republic of Korea; Good Samaritan Hospital, Pohang-si, Republic of Korea; College of Medicine, Gyeongsang National University, Jinju, Republic of Korea
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Kim S, Nam J, Park S, Bae D, Park C, Cho C, Lee J, Yun Y. Study of anxiety and depression in cervical cancer survivors. J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.e20644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
e20644 Background: Cervical cancer is the second leading cause of cancer related deaths among women in Korea. However, few studies have been conducted to elucidate the psychological distress of this population. This study aimed to examine the prevalence of anxiety and depression among cervical cancer survivors, and to identify factors associated with such caseness. Methods: A total of 832 cervical cancer survivors recruited from six large hospitals in Korea completed a mailed survey, which included the Hospital Anxiety and Depression Scale (HADS), European Organization for Research and Treatment of Cancer (EORTC) QLQ-C30, and QLQ-CX24. Anxiety and depression were defined by a score of ≥ 8 on the HADS subscales. With a framework that included socio-demographic, clinical, and symptom characteristics, multivariate logistic regression models were used to identify factors associated with anxiety and depression. Results: Among cervical cancer survivors, 34.3% reported HADS-defined anxiety and 39.7% reported HADS-defined depression. Anxiety was associated with having a lower income (OR=1.95, p=.021), smoking (OR=2.42, p=.002), poor body image (OR=3.26, p<.001), peripheral neuropathy (OR=2.21, p=.002), menopausal symptoms (OR=2.02, p=.004), and sexual inactivity (OR=2.35, p=.001). Depression was associated with younger age (OR=1.75, p=.006), having a lower income (OR=2.14 p<.001), drinking (OR=1.56, p=.050), poor body image (OR=4.59, p<.001), peripheral neuropathy (OR=2.34, p<.001), and sexual inactivity (OR=2.68, p=.002). Both anxiety and depression were influenced by socio-demographic factors, health behaviors, and cervical cancer-specific symptom characteristics rather than cancer- or treatment-related factors. Conclusions: Anxiety and depression were highly prevalent among cervical cancer survivors in Korea. This examination of risk factors for anxiety and depression will be helpful for the development of clinical management strategies in cervical cancer survivors. No significant financial relationships to disclose.
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Affiliation(s)
- S. Kim
- National Cancer Center, Goyang, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Samsung Medical Center, Seoul, Republic of Korea; Kangnam Cha Hospital, Pochon, Republic of Korea; Keimyung University, Daegu, Republic of Korea; Kyung Hee University, Seoul, Republic of Korea
| | - J. Nam
- National Cancer Center, Goyang, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Samsung Medical Center, Seoul, Republic of Korea; Kangnam Cha Hospital, Pochon, Republic of Korea; Keimyung University, Daegu, Republic of Korea; Kyung Hee University, Seoul, Republic of Korea
| | - S. Park
- National Cancer Center, Goyang, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Samsung Medical Center, Seoul, Republic of Korea; Kangnam Cha Hospital, Pochon, Republic of Korea; Keimyung University, Daegu, Republic of Korea; Kyung Hee University, Seoul, Republic of Korea
| | - D. Bae
- National Cancer Center, Goyang, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Samsung Medical Center, Seoul, Republic of Korea; Kangnam Cha Hospital, Pochon, Republic of Korea; Keimyung University, Daegu, Republic of Korea; Kyung Hee University, Seoul, Republic of Korea
| | - C. Park
- National Cancer Center, Goyang, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Samsung Medical Center, Seoul, Republic of Korea; Kangnam Cha Hospital, Pochon, Republic of Korea; Keimyung University, Daegu, Republic of Korea; Kyung Hee University, Seoul, Republic of Korea
| | - C. Cho
- National Cancer Center, Goyang, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Samsung Medical Center, Seoul, Republic of Korea; Kangnam Cha Hospital, Pochon, Republic of Korea; Keimyung University, Daegu, Republic of Korea; Kyung Hee University, Seoul, Republic of Korea
| | - J. Lee
- National Cancer Center, Goyang, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Samsung Medical Center, Seoul, Republic of Korea; Kangnam Cha Hospital, Pochon, Republic of Korea; Keimyung University, Daegu, Republic of Korea; Kyung Hee University, Seoul, Republic of Korea
| | - Y. Yun
- National Cancer Center, Goyang, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Samsung Medical Center, Seoul, Republic of Korea; Kangnam Cha Hospital, Pochon, Republic of Korea; Keimyung University, Daegu, Republic of Korea; Kyung Hee University, Seoul, Republic of Korea
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Jo S, Juhasz A, Zhang K, Ruel C, Wilczynski SP, Yun Y, Ellenhorn JD, Paz B, Vora N, Shibata S. Human papillomavirus (HPV) infection as a prognostic factor in patients with oropharyngeal squamous cell carcinoma treated in a prospective phase II clinical trial. J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.6035] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Lee M, Lee E, Ro J, Kang H, Shin K, Lee K, Chung KW, Kim S, Yun Y. Social support and depression in patients with breast cancer during 1 year from diagnosis compared with the general population. J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.9612] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Lim Y, Kim T, Kwon J, Kim D, Lee S, Kwon B, Hong J, Yun Y. OBOVATOL INHIBITS INTIMAL HYPERPLASIA AFTER CAROTID ARTERY INJURY BY INDUCTION OF P21 PROTEIN. ATHEROSCLEROSIS SUPP 2008. [DOI: 10.1016/s1567-5688(08)70255-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Yu J, Kim T, Lee J, Tudev M, Shin H, Yun Y. GENISTEIN, AN ISOFLAVONE INHIBITS RAT AORTIC SMOOTH MUSCLE CELL PROLIFERATION AND CELL CYCLE THROUGH THE REGULATION OF CELL CYCLE-RELATED PROTEINS. ATHEROSCLEROSIS SUPP 2008. [DOI: 10.1016/s1567-5688(08)70253-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Lee J, Jin Y, Lim Y, Yu J, Lee J, Tudev M, Im J, Park E, Kim T, Lee M, Yun Y. ANTIPLATELET ACTIVITY OF FENOFIBRATE, A PPARALPHA AGONIST, WAS MEDIATED BY BLOCKING OF CYTOSOLIC CALCIUM MOBILIZATION AND THROMBOXANE A2 RECEPTOR. J Thromb Haemost 2007. [DOI: 10.1111/j.1538-7836.2007.tb02384.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Park J, Chang Y, Kang K, Jeong H, Moon D, Kim S, Yun Y. The use of complementary and alternative medicine in patients with terminal cancer in Korea: Nationwide cross-sectional study. J Clin Oncol 2007. [DOI: 10.1200/jco.2007.25.18_suppl.19534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
19534 Background: Although the use of complementary and alternative medicine(CAM) is widespread among patients with chronic diseases including cancer, little is known about CAM use in terminal cancer patients. Methods: This study included 4,042 families of cancer patients who died at 17 hospitals in Korea between January and December 2004. We conducted with telephone survey to decedents’ families. The response rate was 41.1%. The questionnaire included whether cancer patients had used CAM during last one year before death, type of modality, motivation for use, attitudes to CAM, and consultation with doctors. Results: CAM use of cancer patients was reported by 36.3% (604 of 1,662) and the average rate of CAM cost was 32% of total medical costs during one year before patient’s death. CAM use was more likely to death at hospitals (adjusted Odds Ratio: 1.35, 95% Confidential Interval: 1.15–1.58), residence in rural (aOR:1.26, 95%CI:1.08–1.47), need consultations about care (aOR:1.65, 95%CI:1.30–2.09) and religious support (aOR:1.3, 95% CI:1.11–1.53), diagnosis except liver/gallbladder cancer (aOR:0.67, 95%CI:0.55–0.81), and longer disease period (aOR:1.85, 95% CI:1.5–2.2). Use was greatest for mushrooms (41.6%), vegetable juice (25.6%), ginseng (21.8%) and Chinese medicine (16.4%). The motivation for CAM use was the recommendations from family members or friends (83.5%) and internet or advertisement (16.1%) but physicians’ recommendation or education (1.4%) was rare. The 37.4% of families of CAM-used patients were satisfied with CAM because of but feeling better or comfortable (79.3%), not cure (5.4%). And otherwise, the 62.1% of them were unsatisfied with CAM because of no effect (87.3%). Only 41.7% CAM users consulted with their physician. Conclusions: This study revealed a high prevalence of CAM use among terminal cancer patients without recommendation from doctors. Medical staffs should evaluate patients’ CAM use and inform accurately about CAM to terminal cancer patients and family for quality of care improvement. No significant financial relationships to disclose.
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Affiliation(s)
- J. Park
- National Cancer Center, Goyang, Republic of Korea; National Cancer Center, Seoul, Republic of Korea; Gyeong Sang National University Hospital, Jinju, Republic of Korea; Good Samaritan Hospital, Pohang, Republic of Korea; Sam Anyang Hospital, Anyang, Republic of Korea; Chungnam University, Daejeon, Republic of Korea
| | - Y. Chang
- National Cancer Center, Goyang, Republic of Korea; National Cancer Center, Seoul, Republic of Korea; Gyeong Sang National University Hospital, Jinju, Republic of Korea; Good Samaritan Hospital, Pohang, Republic of Korea; Sam Anyang Hospital, Anyang, Republic of Korea; Chungnam University, Daejeon, Republic of Korea
| | - K. Kang
- National Cancer Center, Goyang, Republic of Korea; National Cancer Center, Seoul, Republic of Korea; Gyeong Sang National University Hospital, Jinju, Republic of Korea; Good Samaritan Hospital, Pohang, Republic of Korea; Sam Anyang Hospital, Anyang, Republic of Korea; Chungnam University, Daejeon, Republic of Korea
| | - H. Jeong
- National Cancer Center, Goyang, Republic of Korea; National Cancer Center, Seoul, Republic of Korea; Gyeong Sang National University Hospital, Jinju, Republic of Korea; Good Samaritan Hospital, Pohang, Republic of Korea; Sam Anyang Hospital, Anyang, Republic of Korea; Chungnam University, Daejeon, Republic of Korea
| | - D. Moon
- National Cancer Center, Goyang, Republic of Korea; National Cancer Center, Seoul, Republic of Korea; Gyeong Sang National University Hospital, Jinju, Republic of Korea; Good Samaritan Hospital, Pohang, Republic of Korea; Sam Anyang Hospital, Anyang, Republic of Korea; Chungnam University, Daejeon, Republic of Korea
| | - S. Kim
- National Cancer Center, Goyang, Republic of Korea; National Cancer Center, Seoul, Republic of Korea; Gyeong Sang National University Hospital, Jinju, Republic of Korea; Good Samaritan Hospital, Pohang, Republic of Korea; Sam Anyang Hospital, Anyang, Republic of Korea; Chungnam University, Daejeon, Republic of Korea
| | - Y. Yun
- National Cancer Center, Goyang, Republic of Korea; National Cancer Center, Seoul, Republic of Korea; Gyeong Sang National University Hospital, Jinju, Republic of Korea; Good Samaritan Hospital, Pohang, Republic of Korea; Sam Anyang Hospital, Anyang, Republic of Korea; Chungnam University, Daejeon, Republic of Korea
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Noh H, Lee M, Yun Y, Park S, Bae D, Nam J, Park C, Cho C, Lee J, Chang Y. Cervical cancer patients’ preferences and use of various cancer information sources in South Korea. J Clin Oncol 2007. [DOI: 10.1200/jco.2007.25.18_suppl.16073] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
16073 Background: Accessing appropriate facts is important in enabling cancer patients cope with the disease. This study focused on the utilization and preferences of cancer information sources by cervical cancer patients in terms of ease in receiving and searching the available data. Methods: The study included 830 women over the age of 18 years treated for cervical cancer at six hospitals in South Korea between 1983 and 2004. All the participants provided written informed consent, and the Institutional Review Board of the National Cancer Center approved the protocol. A questionnaire addressed the patients’ use of and preferences for sources and forms of cancer information. Data were collected by mail. Results: Television and/or the radio were the the most frequently cited sources of cancer information by the middle and oldest age groups: 45–64 years (52.0%), =65 years (47.3%), while patients in the youngest age group (<45 years) used the Internet (38.8%). Booklets and/or pamphlets (24.0%) were the source of cancer information preferred by the youngest age group, while patients in the middle and oldest age groups preferred TV/radio: 45–64 years (35.7%) and =65 years (55.0%). Life notes and/or experiences (43.2%), that is, personal accounts, comprised the most easily understood form of information regardless of age group. Conclusions: Our findings indicate that cervical cancer patients’ utilization of and preferences for sources of cancer information vary according to patient age. Tailored educational materials that consider the users’ age and condition should be customized to best fit their specific preferences. No significant financial relationships to disclose.
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Affiliation(s)
- H. Noh
- National Cancer Center, Gyeonggi-do, Republic of Korea; Samsung Medical Center, Seoul, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Kangnam Cha Hospital, Seoul, Republic of Korea; Keimyung University, Daegu, Republic of Korea; East-West Neo Medical Center, Seoul, Republic of Korea
| | - M. Lee
- National Cancer Center, Gyeonggi-do, Republic of Korea; Samsung Medical Center, Seoul, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Kangnam Cha Hospital, Seoul, Republic of Korea; Keimyung University, Daegu, Republic of Korea; East-West Neo Medical Center, Seoul, Republic of Korea
| | - Y. Yun
- National Cancer Center, Gyeonggi-do, Republic of Korea; Samsung Medical Center, Seoul, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Kangnam Cha Hospital, Seoul, Republic of Korea; Keimyung University, Daegu, Republic of Korea; East-West Neo Medical Center, Seoul, Republic of Korea
| | - S. Park
- National Cancer Center, Gyeonggi-do, Republic of Korea; Samsung Medical Center, Seoul, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Kangnam Cha Hospital, Seoul, Republic of Korea; Keimyung University, Daegu, Republic of Korea; East-West Neo Medical Center, Seoul, Republic of Korea
| | - D. Bae
- National Cancer Center, Gyeonggi-do, Republic of Korea; Samsung Medical Center, Seoul, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Kangnam Cha Hospital, Seoul, Republic of Korea; Keimyung University, Daegu, Republic of Korea; East-West Neo Medical Center, Seoul, Republic of Korea
| | - J. Nam
- National Cancer Center, Gyeonggi-do, Republic of Korea; Samsung Medical Center, Seoul, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Kangnam Cha Hospital, Seoul, Republic of Korea; Keimyung University, Daegu, Republic of Korea; East-West Neo Medical Center, Seoul, Republic of Korea
| | - C. Park
- National Cancer Center, Gyeonggi-do, Republic of Korea; Samsung Medical Center, Seoul, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Kangnam Cha Hospital, Seoul, Republic of Korea; Keimyung University, Daegu, Republic of Korea; East-West Neo Medical Center, Seoul, Republic of Korea
| | - C. Cho
- National Cancer Center, Gyeonggi-do, Republic of Korea; Samsung Medical Center, Seoul, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Kangnam Cha Hospital, Seoul, Republic of Korea; Keimyung University, Daegu, Republic of Korea; East-West Neo Medical Center, Seoul, Republic of Korea
| | - J. Lee
- National Cancer Center, Gyeonggi-do, Republic of Korea; Samsung Medical Center, Seoul, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Kangnam Cha Hospital, Seoul, Republic of Korea; Keimyung University, Daegu, Republic of Korea; East-West Neo Medical Center, Seoul, Republic of Korea
| | - Y. Chang
- National Cancer Center, Gyeonggi-do, Republic of Korea; Samsung Medical Center, Seoul, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Kangnam Cha Hospital, Seoul, Republic of Korea; Keimyung University, Daegu, Republic of Korea; East-West Neo Medical Center, Seoul, Republic of Korea
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Lee K, Lee M, Bae J, Kim S, Kim Y, Ryn K, Lee J, Noh J, Sohn T, Hong S, Yun Y. Work situation and work-related difficulties in stomach cancer survivors compared with the general population. J Clin Oncol 2007. [DOI: 10.1200/jco.2007.25.18_suppl.9084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
9084 Background: We aimed to investigate the work situation and work-related difficulties among stomach cancer survivors compared with the general population. Methods: We enrolled 426 stomach cancer survivors diagnosed 2001 to 2003 from two hospitals and 994 members without a history of cancer selected randomly from a representative sample of Korea adults. We identified work situation and work-related difficulties in two groups using multivariate logistic regression. Results: An employment rate of stomach cancer survivors decreased from 66.2% to 53.1% at average 28 months after their diagnosis and it was lower than that of general population (63.5%). The primary reason for not-working in survivors were that they were easily fatigued (31.2%) and had limitations in physical functioning (13.0%). Examining work-related difficulties, 50.6% of survivors who were working at the time of survey reported that they were easily fatigued and 37.5% of survivors reported that their capacity of work decreased whereas only 22.4%, 10.6% of general population reported. Survivors had housework- related difficulties because they were easily fatigued (74.4%) and emotionally distressful (12.2%) whereas 58.0% and 4.0% of general population reported. Older age (adjusted odds ratio [aOR]=18.12; 95% confidence interval [CI]=6.59 to 49.81), female (aOR=5.30; 95% CI=7.37 to 31.31), low income (aOR=1.87; 95% CI=1.04 to 3.33), poor physical functioning (aOR=0.97; 95% CI=0.95 to 0.98) and total gastrectomy (aOR=2.40; 95% CI=1.26 to 4.60) were more likely to increase the likelihood of not working in stomach cancer survivors. Conclusions: Stomach cancer and its treatment had a negative impact on employment rate as previous studies with other type of cancer. Our study found that stomach cancer survivors had an experience not only work-related but also housework-related difficulties. This information on stomach survivors’ might be help to make a better plan for the intervention of stomach cancer survivors’ return to work. No significant financial relationships to disclose.
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Affiliation(s)
- K. Lee
- National Cancer Center, Gyeonggi-do, Republic of Korea; Samsung Medical Center, Sungkyunkwan University, Seoul, Republic of Korea
| | - M. Lee
- National Cancer Center, Gyeonggi-do, Republic of Korea; Samsung Medical Center, Sungkyunkwan University, Seoul, Republic of Korea
| | - J. Bae
- National Cancer Center, Gyeonggi-do, Republic of Korea; Samsung Medical Center, Sungkyunkwan University, Seoul, Republic of Korea
| | - S. Kim
- National Cancer Center, Gyeonggi-do, Republic of Korea; Samsung Medical Center, Sungkyunkwan University, Seoul, Republic of Korea
| | - Y. Kim
- National Cancer Center, Gyeonggi-do, Republic of Korea; Samsung Medical Center, Sungkyunkwan University, Seoul, Republic of Korea
| | - K. Ryn
- National Cancer Center, Gyeonggi-do, Republic of Korea; Samsung Medical Center, Sungkyunkwan University, Seoul, Republic of Korea
| | - J. Lee
- National Cancer Center, Gyeonggi-do, Republic of Korea; Samsung Medical Center, Sungkyunkwan University, Seoul, Republic of Korea
| | - J. Noh
- National Cancer Center, Gyeonggi-do, Republic of Korea; Samsung Medical Center, Sungkyunkwan University, Seoul, Republic of Korea
| | - T. Sohn
- National Cancer Center, Gyeonggi-do, Republic of Korea; Samsung Medical Center, Sungkyunkwan University, Seoul, Republic of Korea
| | - S. Hong
- National Cancer Center, Gyeonggi-do, Republic of Korea; Samsung Medical Center, Sungkyunkwan University, Seoul, Republic of Korea
| | - Y. Yun
- National Cancer Center, Gyeonggi-do, Republic of Korea; Samsung Medical Center, Sungkyunkwan University, Seoul, Republic of Korea
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Jiawei L, Yuechan L, Riran W, Yan D, Yun Y, Xiufeng L. P-469. Fertil Steril 2006. [DOI: 10.1016/j.fertnstert.2006.07.831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Park D, Yun Y. Tyrosine phosphorylation-dependent yeast two-hybrid system for the identification of the SH2 domain-binding proteins. Mol Cells 2001; 12:244-9. [PMID: 11710529] [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 this paper, we established a modified yeast two-hybrid system, which is specialized for the detection of SH2 domain-binding proteins. The employment of the SH2 domain-tyrosine kinase fusion protein as bait allowed the efficient identification of SH2 domain-binding proteins. The general applicability of the system was tested using various combinations of SH2-kinase fusion bait and prey. The results indicate that the system specifically detected the previously reported in vivo interactions between the SH2 domains and their binding partners. In addition, using this system, we found the interaction between the adaptor protein, Lad, and the SH2 domain of Grb2 or PLC-gamma1. The binding of Lad to Grb2 was further confirmed in mammalian cells by a co-immunoprecipitation study. The conclusion is that the established tyrosine phosphorylation-dependent yeast two-hybrid system provides a novel and efficient way to define the SH2 domain-binding molecules.
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Affiliation(s)
- D Park
- Division of Molecular Life Science & the Center for Cell Signaling Research at Ewha Woman's University, Seoul, Korea
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36
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Kim H, Lee YH, Won J, Yun Y. Through induction of juxtaposition and tyrosine kinase activity of Jak1, X-gene product of hepatitis B virus stimulates Ras and the transcriptional activation through AP-1, NF-kappaB, and SRE enhancers. Biochem Biophys Res Commun 2001; 286:886-94. [PMID: 11527382 DOI: 10.1006/bbrc.2001.5496] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [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: 01/26/2023]
Abstract
Here, based on the recent finding of HBx (X-gene product of hepatitis B virus) as the inducer of Jak1, we investigated the mechanism for the HBx-mediated host cell regulation and found that (i) HBx associates specifically with Jak1 in vivo; (ii) HBx itself forms a dimer which leads to juxtaposition of associated Jak1 and subsequent activation of the tyrosine kinase activity of Jak1; (iii) HBx-mediated activation of the promoters containing AP-1-, NF-kappaB-, SRE-, and SIE-sites is dependent on the activation of Jak1; (iv) Jak1, once activated by HBx, induces Ras activity through recruitment of Grb2 and induces tyrosine phosphorylation of Raf1, but not shc. These findings show that previously reported functions of HBx, such as activation of multiple signaling pathways and transcriptional activation are attributable to HBx-mediated Jak1 activation.
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Affiliation(s)
- H Kim
- Division of Molecular Life Science and Center for Cell Signaling Research, Ewha Woman's University, 11-1 Daehyundong, Seoul, Seodaemoongu, 120-750, Korea
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Park D, Choi YB, Han MK, Kim UH, Shin J, Yun Y. Adaptor protein Lad relays PDGF signal to Grb2 in lung cells: a tissue-specific PDGF signal transduction. Biochem Biophys Res Commun 2001; 284:275-81. [PMID: 11394873 DOI: 10.1006/bbrc.2001.4957] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [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
Lad was previously identified as an adaptor protein binding to the SH2 domain of Lck (1). Specific detection of Lad mRNA in lung cells, as well as, in T cells led us to investigate the signaling pathways regulating Lad in lung cells. We found that (i) upon PDGF stimulation, Lad expression is induced in lung cells, especially in the bronchial epithelial cells; (ii) Lad is tyrosine phosphorylated upon PDGF stimulation and is associated with PDGF receptor; (iii) upon PDGF stimulation, Grb2 is recruited to Lad in human embryonic lung cells; (iv) overexpression of Lad elevated AP-1 promoter activity by two- to threefold, whereas dominant negative Lad abrogated PDGF-dependent activation of AP-1 promoter. These results provide a novel mechanism of PDGF-dependent signaling, in which Lad acts as an adaptor in a tissue-specific manner, linking PDGF signal to Grb2 and subsequent activation of AP-1.
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Affiliation(s)
- D Park
- Division of Molecular Life Science, Ewha Womans University, Seoul, 120-750, Korea
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Chen S, Chen Y, Yun Y. [The influence of malocclusion on self-esteem and personality of college student]. Zhonghua Kou Qiang Yi Xue Za Zhi 2000; 35:299-302. [PMID: 11780517] [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: 02/23/2023]
Abstract
OBJECTIVE To study the relationship among the different malocclusions and self-esteem and personality. METHODS Two hundred and forty college students with normal occlusion and different types of malocclusion were classified into four groups(class I, class II, class III and normal) by Angle's classification, Sixty students in each group. The first three groups had been divided into three subgroups respectively by IOTN: mild, moderate and severe, twenty students in each subgroup. Each subject was assessed by using the body-esteem scale (BES) and the Eysenck personality questionnaire (EPQ). RESULTS (1) the mean score on facial appearance subscale in BES of the normal group is significantly higher than that of moderate and severe subgroups in class II and class III groups; (2) the mean T score on E subscale in EPQ of the normal group is significantly higher than that of severe subgroups in class II and class III groups, and the mean T score on N subscale in EPQ of the normal group is significantly lower than that of severe subgroups in class II and class III groups; (3) There is a positive correlation between the mean score on facial appearance subscale in BES and the mean T score on E subscale in EPQ and a negative correlation between the mean score on facial appearance subscale in BES and the mean T score on N subscale in EPQ. CONCLUSIONS (1) The students with moderate and severe class II and class III malocclusion have lower self esteem about their facial appearance than normal students; (2) The trends of introverstion and astatic emotion are higher in students with severe class II and class III malocclusion than in normal students; (3) The higher self esteem about his (or her) facial appearance, the higher trends of extroversion and statical emotion he(or she) has; the lower self-esteem about his (or her) facial appearance, the higher trends of introversion and astatic emotion he (or she) has.
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Affiliation(s)
- S Chen
- Department of Orthodontics, Dental College, West China University of Medical Science, Chengdu 610041, China
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Lee SW, Lee YM, Bae SK, Murakami S, Yun Y, Kim KW. Human hepatitis B virus X protein is a possible mediator of hypoxia-induced angiogenesis in hepatocarcinogenesis. Biochem Biophys Res Commun 2000; 268:456-61. [PMID: 10679226 DOI: 10.1006/bbrc.2000.2093] [Citation(s) in RCA: 79] [Impact Index Per Article: 3.3] [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: 12/18/2022]
Abstract
The hepatitis B virus (HBV)-encoded transcriptional activator HBV-X protein (HBx) was known to be involved in hepatocarcinogenesis. Hepatocarcinogenesis generally included an active angiogenesis that was mainly considered to be due to a local hypoxia in liver tissues. However, the exact mechanisms of HBx-induced hepatocarcinogenesis were poorly understood. In this study, we examined the role of HBx in the increased angiogenesis and the possible regulating mechanisms of HBx by hypoxia. We demonstrated that HBx stimulated the transcription of vascular endothelial growth factor (VEGF), a potent angiogenic factor, in HBx-stable transfectants. HBx-induced angiogenesis was confirmed by in vivo tumor angiogenesis assay, resulting in that the HBx transfectants increased the formation of new blood vessels compared to the control transfectants. Then, we demonstrated that the expression of HBx was enhanced after incubating HBV-infected hepatoma cells under hypoxia. Moreover, the activity of HBV enhancer 1 (Enh1) was increased when hepatoma cells transfected with the reporter plasmid containing HBV Enh1 were exposed to hypoxic conditions. These results strongly suggest that HBx may play a critical role in the hypoxia-induced angiogenesis through transcriptional activation of VEGF during hepatocarcinogenesis.
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Affiliation(s)
- S W Lee
- Department of Molecular Biology, Pusan National University, Pusan, 609-735, Korea
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Cho YS, Han MK, Choi YB, Yun Y, Shin J, Kim UH. Direct interaction of the CD38 cytoplasmic tail and the Lck SH2 domain. Cd38 transduces T cell activation signals through associated Lck. J Biol Chem 2000; 275:1685-90. [PMID: 10636863 DOI: 10.1074/jbc.275.3.1685] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [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: 11/06/2022] Open
Abstract
CD38 ligation has been shown to induce activation of intracellular signaling cascade in T lymphocytes through a Lck-dependent pathway. However, it is not clear how Lck initiates the CD38-mediated signaling process. In the present study, we showed that CD38 and Lck were physically associated through the cytoplasmic tail and the Src homology 2 domain, respectively. This was evidenced by coimmunoprecipitation of Lck with CD38 and Lck with isolated CD38 cytoplasmic domain from T cell lysate, cell lysate of COS-7 cells cotransfected with cDNAs of Lck and CD38, or a mixture of in vitro translated CD38 and Lck. Because the CD38 cytoplasmic domain does not contain any tyrosine residue, the interaction should be independent of phosphotyrosine. The interaction was further confirmed by in vitro interaction between a purified Lck Src homology 2 domain and a nonphosphosynthetic peptide corresponding to the membrane proximal region of the CD38 cytoplasmic domain. In addition, CD38 ligation resulted in an elevated tyrosine kinase activity of the CD38-associated Lck and ultimate activation of interleukin-2 gene transcription. Furthermore, expression of a kinase-deficient Lck mutant suppressed interleukin-2 gene activation in a dose-dependent manner. These results strongly suggested that CD38 ligation indeed tranduced signals for T cell activation using its associated Lck.
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Affiliation(s)
- Y S Cho
- Department of Biochemistry and Institute for Medical Sciences, Chonbuk National University Medical School, Chonju, 561-182 Korea
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Choi YB, Kim CK, Yun Y. Lad, an adapter protein interacting with the SH2 domain of p56lck, is required for T cell activation. J Immunol 1999; 163:5242-9. [PMID: 10553045] [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: 02/14/2023]
Abstract
T cell-specific Src family tyrosine kinase, p56lck, plays crucial roles in T cell differentiation, activation, and proliferation. These multiple functions of p56lck are believed to be conducted through the protein-protein interactions with various cellular signaling proteins. To clarify the mechanisms through which p56lck contributes to T cell signaling, we identified the proteins binding to the Src homology 2 (SH2) domain of p56lck through a tyrosine phosphorylation-dependent yeast two-hybrid screening. Subsequent characterization of positive clones revealed the presence of a protein of 366 aa named Lad (Lck-associated adapter protein), which is a potential murine homologue of previously reported TSAd, a T cell-specific adapter protein. Lad contains several protein-protein interaction domains including a zinc-finger motif, an SH2 domain, a proline-rich SH3 binding motif, and several phosphotyrosine sites. Furthermore, Lad was tyrosine phosphorylated and associated with p56lck in vivo and redistributed from cytoplasm to the plasma membrane in a T cell activation-dependent manner. Moreover in T cells, IL-2 promoter activity was enhanced upon coexpression of Lad but was inhibited by the coexpression of antisense Lad RNA. These characteristics of Lad suggest that Lad play an essential role as an adapter protein in p56lck-mediated T cell signaling.
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Affiliation(s)
- Y B Choi
- Signal Transduction Laboratory Mogam Biotechnology Research Institute, Koosungmyon, Yonginsi, Kyunggido, Korea
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Won J, Kim H, Park EJ, Hong Y, Kim SJ, Yun Y. Tumorigenicity of mouse thymoma is suppressed by soluble type II transforming growth factor beta receptor therapy. Cancer Res 1999; 59:1273-7. [PMID: 10096559] [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: 02/11/2023]
Abstract
Many types of tumor cells overexpress transforming growth factor beta (TGF-beta), which is believed to promote tumor progression. We hypothesized that overexpression of the extracellular region of the type II TGF-beta receptor (soluble TbetaRII) would compete for or block TGF-beta binding to TbetaRs on immune cells, preventing TGF-beta-mediated immunosuppression and consequently resulting in the eradication of tumor cells. We tested this in the mouse thymoma cell line EL4, which has been reported to suppress cellular immunity by secreting a large amount of TGF-beta. Transduction of EL4 with recombinant retrovirus encoding soluble TbetaRII resulted in the secretion of heterogeneously glycosylated, 25 to 35 kDa truncated TbetaRII. Inoculation of 1 x 10(4) to 5 x 10(4) soluble TbetaRII-modified EL4 cells (EL4/Ts, EL4 cells transduced with recombinant retrovirus encoding soluble TbetaRII and neomycin resistance gene) s.c. to mice showed reduced tumorigenicity, as indicated by lower overall tumor incidence (7%, 1 of 14; P < 0.001) compared with unmodified EL4 (100%, 9 of 9) or vector-modified EL4 cells (EL4/neo, EL4 cells transduced with recombinant retrovirus encoding neomycin resistance gene; 100%, 4 of 4). Administration of mitomycin C-treated EL4/Ts cells (1 x 10(6)) after EL4 inoculation (1 x 10(4)) reduced tumor incidence from 100% (5 of 5 in mice inoculated with mitomycin C-treated EL4/neo) to 40% (4 of 10, P < 0.05), indicating that supply of soluble TbetaRII could actually block TGF-beta-mediated tumorigenesis. In vitro tumor cytotoxicity assays revealed 3-5-fold higher cytotoxic activity with lymphocytes from EL4/Ts-bearing mice compared with those from EL4- or EL4/neo-bearing mice, indicating that the observed tumor rejection was mediated by restoration of the tumor-specific cellular immunity. These data suggest that expression of soluble TbetaRII is an effective strategy for treating highly progressive tumors secreting TGF-beta.
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Affiliation(s)
- J Won
- Mogam Biotechnology Research Institute, Kyonggi-Do, Korea
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Abstract
A venom gland cDNA library of Agkistrodon halys was constructed and screened with a probe based on the consensus sequence of venomic serine proteases. Next, we determined the sequences of the entire open reading frames of two selected positives which were found to encode novel serine proteases of 234 and 233 amino acids in length and named as Haly-PA and Haly 2, respectively. Upon protein data base search, Haly-PA showed the highest similarity of 82% to the previously characterized plasminogen activator, TSV-PA (Zhang et al. 1995, J. Biol. Chem. 270, 10246- 10255). Haly 2 displayed a 78% similarity to beta-fibrinogenase (Hung et al. 1994, B. B. R. C., 205, 1707 1715). Haly-PA was successfully expressed using the baculovirus system and secreted into the culture media as a 32 kDa glycoprotein. In the western analysis of snake venom, anti-Haly-PA antibody detected the same size of band indicating that this enzyme is a component of snake venom. Recombinant Haly-PA was purified to homogeneity using the combination of anion exchange and gel filtration column. In the fibrino(geno)lytic assay, recombinant Haly-PA displayed an indirect fibrino(geno)lytic activity depending on the presence of plasminogen and cleaved the plasminogen to generate the active plasimin. These results indicate that Haly-PA is a plasminogen activator and displays fibrino(geno)lytic activity through conversion of plasminogen to plasmin.
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Affiliation(s)
- D Park
- Signal Transduction Lab., Mogam Biotechnology Research Institute, Kyunggido, South Korea
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Park D, Kang I, Kim H, Chung K, Kim DS, Yun Y. Cloning and characterization of novel disintegrins from Agkistrodon halys venom. Mol Cells 1998; 8:578-84. [PMID: 9856345] [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: 02/09/2023] Open
Abstract
Snake venom disintegrins act as potent inhibitors of platelet aggregation. In this report, we isolated genes encoding novel members of disintegrins through the screening of Agkistrodon halys venom gland cDNA library. Subsequent characterization of positives revealed the presence of distinct disintegrins named salmosinl, 2, and 3, each containing a characteristic RGD/KGD sequence essential for the binding to integrins. Whereas salmosinl was identical to previously described salmosin purified from A. halys venom, salmosin2 and salmosin3 were predicted to be a novel, 73 amino acid protein with a KGD sequence, and an 80 amino acid protein with an additional 7th disulfide bond, respectively. Taken together, this is the first report describing 3 unique disintegrins, namely, salmosinl with RGD, salmosin2 with KGD and salmosin3 with 7 disulfide bonds are found in a single species of venom. Subsequently, to compare the platelet aggregation inhibitory potential of the recombinant protein with that of natural protein, salmosinl was expressed in E. coli and purified to homogeneity. Recombinant and natural salmosin1 inhibited the binding of alphaIIbbeta3 to fibrinogen with an almost identical IC50 value of 2.2 nM and 4.5 nM respectively. Moreover, recombinant salmosinl displayed an IC50 value approximately 5-fold lower than flavoridin, which was previously described as the most potent venom disintegrin so far. In conclusion, we identified 3 disintegrins with distinct properties through the molecular cloning approach and found that the recombinant salmosinl retained one of the most potent alphaIIbbeta3 antagonist activity.
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Affiliation(s)
- D Park
- Mogam Biotechnology Research Institute, Yonginsi, Kyunggido, Korea
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Park C, Choi Y, Yun Y. Son of sevenless binds to the SH3 domain of src-type tyrosine kinase. Mol Cells 1998; 8:518-23. [PMID: 9856337] [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: 02/09/2023] Open
Abstract
To identify molecules which bind to the SH3 domains of p56lck, we screened a mouse T-cell lymphoma cDNA library using the yeast two-hybrid system. As a result, we obtained several positive clones including the Son of Sevenless gene which encodes a mammalian homolog of Drosophila Ras GDP/GTP exchange factor. In a subsequent analysis with the yeast two-hybrid system, Sos associated only with the constitutively active form of p56lck (F505) but not with wild type p56lck (Y505), indicating the requirement for an active conformation of p56lck for binding to Sos. Subsequently, we have demonstrated in vitro that the SH3 domain of p56lck as well as the proline-rich sequences of Sos are responsible for this association. In addition, the proline-rich domain of Sos also bound to the SH3 domains of other src-type tyrosine kinases, src and fyn, but not to that of PLC-gamma. More importantly, the p56lck SH3-Sos interaction was enhanced by serum stimulation, suggesting the possibility that the direct interaction between p56lck SH3 and Sos may contribute to the regulation of the Ras pathway.
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Affiliation(s)
- C Park
- Signal Transduction Laboratory, Mogam Biotechnology Research Institute, Younginsi, Korea
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Abstract
The X-gene product (HBx) of the hepatitis B virus plays essential roles in viral replication and the generation of hepatocellular carcinoma. Although the mechanism for HBx action is unclear, HBx may exert its pleiotropic functions through the stimulation of signal transduction pathways including the Ras/mitogen-activated protein kinase cascade and/or inactivation of the p53 function. Here, we investigated whether HBx has the ability to activate the Jak-STAT signaling pathway. As a first step, we established stable cell lines constitutively expressing HBx. In these HBx-expressing stable cells, the tyrosine phosphorylation of various STATs, including STAT3 and -5, was constitutively enhanced by HBx, and the concomitant increase in STAT-dependent DNA binding and transcriptional activation was observed. Furthermore, HBx specifically elevated tyrosine phosphorylation and in vitro kinase activity of Jak1, but not Jak2 or Tyk2, through protein to protein interaction with Jak1. These results clearly establish HBx as the inducer of the Jak-STAT signaling pathway, and at the same time, HBx-mediated Jak-STAT activation may provide a novel mechanism for the pleiotropic functions of HBx, including transformation and promiscuous transcriptional activation.
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Affiliation(s)
- Y H Lee
- Signal Transduction Laboratory, Mogam Biotechnology Research Institute, 341 Pojungri, Koosungmyon, Yonginsi, Kyunggido 449-910, Korea
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Abstract
Here, we established the inhibitory mechanism of p53 on hepatitis B viral gene expression using HepG2 cells. Our results are as follows. First, p53 down-regulated the activities of all four promoters of hepatitis B virus (HBV), suggestive of the presence of a common element mediating the p53-dependent transcriptional repression. Second, employing the 5'-deletion constructs of the pregenomic/core promoter, the liver-specific enhancer II region was localized as a target for the p53-mediated transcriptional repression. Third, in a detailed analysis of the enhancer II region, the 5'-proximal 31-base pair region was defined as a p53-repressible element. Throughout the study, p53-mediated repression was rescued upon coexpression of the X-gene product, HBx. Finally, in an electrophoretic mobility shift assay, the defined p53-repressible element did not bind purified p53 directly, but shifted three bands in HepG2 nuclear extract, two of which was supershifted upon addition of p53 monoclonal antibody. These results display a novel mechanism of p53-dependent transcriptional repression in which p53 negatively regulates the viral-specific DNA enhancer through protein to protein interaction with an enhancer-binding protein. At the same time, the results indicate that p53 plays a defensive role against HBV by transcriptionally repressing the HBV core promoter through liver-specific enhancer II and HBx is required to counteract this inhibitory function of p53.
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Affiliation(s)
- H Lee
- Signal Transduction Laboratory, Mogam Biotechnology Research Institute, 341 Pojungri, Koosungmyon, Yongingoon, Kyunggido 449-910, Korea
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Kang IC, Chung KH, Lee SJ, Yun Y, Moon HM, Kim DS. Purification and molecular cloning of a platelet aggregation inhibitor from the snake (Agkistrodon halys brevicaudus) venom. Thromb Res 1998; 91:65-73. [PMID: 9722022 DOI: 10.1016/s0049-3848(98)00053-x] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.5] [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: 11/18/2022]
Abstract
A platelet glycoprotein IIb-IIIa (GP IIb-IIIa) antagonist, salmosin, was purified to homogeneity from Korean snake (Agkistrodon halys brevicaudus) venom by means of chromatographic fractionations. We have isolated the cDNA encoding salmosin by using the cDNA library of the snake venom gland and analyzed its complete nucleotide sequence. The molecular identity was confirmed by comparison of the deduced amino acid sequence with the directly determined primary structure of salmosin. This protein is a single-chain polypeptide composed of 73 amino acids including 12 cysteines as well as the sequence Arg-Gly-Asp, a proposed recognition site of adhesive proteins. The primary sequence of salmosin shows considerable homology to previously described proteins of snake venom GP IIb-IIIa antagonist family. A molecular mass of 7474 for the protein was determined by matrix-assisted laser desorption ionization mass spectrometry. Salmosin inhibits GP IIb-IIIa binding to immobilized fibrinogen with an IC50 of 2.2 nM and ADP-induced platelet aggregation with an IC50 of 131 nM, respectively. This work demonstrates the purification, characterization, and cDNA cloning of salmosin, a platelet aggregation inhibitor that may have therapeutic potential as an antithrombotic agent.
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Affiliation(s)
- I C Kang
- Protein Laboratory, Mogam Biotechnology Research Institute, Yongin-city, Kyonggi-do, Korea
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Li Z, Velleman SG, McFarland DC, Pesall JE, Gilkerson KK, Ferrin NH, Yun Y. Characterization of satellite cells derived from chickens with the low score normal (LSN) muscle weakness. Cytobios 1998; 91:75-85. [PMID: 9589604] [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: 02/07/2023]
Abstract
Myogenic satellite cell clones were established from the pectoralis major muscle of chickens with the low score normal (LSN) muscle weakness and controls. The percentage of cells which attached to substrata and began to proliferate was higher for the control line than the LSN line (55% vs 30%). Furthermore, of those clones which initiated growth, 63% of the control cells and only 32% of the LSN cells proliferated to confluence in 25 cm2 tissue culture flasks. Proliferation rates were significantly lower with LSN satellite cells than with controls (p < 0.05). LSN satellite cells were less responsive to the mitogenic effects of chicken serum (p < 0.05) and differentiation rates were lower compared with controls (p < 0.05). There was a greater (p < 0.05) number of insulin-like growth factor receptors on LSN satellite cells compared with controls. The IGF receptor binding affinities (Kds) between the two cell lines were similar (p > 0.05). The results suggest that a defect in satellite cell physiology may contribute to the skeletal muscle weakness seen in the LSN line.
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Affiliation(s)
- Z Li
- Department of Animal and Range Sciences, South Dakota State University, Brookings 57007-0392, USA
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50
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Abstract
Hepatitis B virus is a causative agent of hepatocellular carcinoma, and in the course of tumorigenesis, the X-gene product (HBx) is known to play important roles. Here, we investigated the transforming potential of HBx by conventional focus formation assay in NIH3T3 cells. Cells were cotransfected with the HBx expression plasmid along with other oncogenes including Ha-ras, v-src, v-myc, v-fos, and E1a. Unexpectedly, the introduction of HBx completely abrogated the focus-forming ability of all five tested oncogenes. In addition, the cotransfection of Bcl-2, an apoptosis inhibitor, reversed the HBx-mediated inhibition of focus formation, suggesting that the observed repression of focus formation by HBx is through the induction of apoptosis. Next, to test unequivocally whether HBx induces apoptosis in liver cells, we established stable Chang liver cell lines expressing HBx under the control of a tetracycline-inducible promoter. Induction of HBx in these cells in the presence of 1% calf serum resulted in typical apoptosis phenomena such as DNA fragmentation, nuclear condensation, and fragmentation. Based on these results, we propose that HBx sensitizes liver cells to apoptosis upon hepatitis B virus infection, contributing to the development of hepatitis and the subsequent generation of hepatocellular carcinoma.
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Affiliation(s)
- H Kim
- Signal Transduction Laboratory, Mogam Biotechnology Research Institute, 341 Pojungri, Koosungmyon, Yonginsi, Kyunggido 449-910, Korea
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