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Oh SH, Kim KM, Kim DY, Kim T, Hwang S, Park KM, Lee YJ, Lee SG. Incidence and risk factors for the development of prolonged severe intrahepatic cholestasis after pediatric living-donor liver transplantation. Transplant Proc 2011; 43:2400-2. [PMID: 21839277 DOI: 10.1016/j.transproceed.2011.06.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The aim of this study is to evaluate the incidence, etiology, and risk facrors for prolonged severe intrahepatic cholestasis (PSIC) after 129 pediatric living-donor liver transplantations (LDLT). The incidence of PSIC was 25.6% (n = 33). Twenty-eight (84.8%) versus 5 (15.2%) children experienced early versus late PSIC, respectively. Among these 33 children with PSIC, 8 (24.2%) received a donor liver with mild to moderate fatty change, 4 (12.1%) with low graft-body weight ratios, and 4 (12.1%) with ABO incompatibility. The predominant etiologies were acute rejection (n = 15; 45.5%), chronic rejection (n = 6; 18.2%), virus (n = 3; 9.1%), vascular complications (n = 4; 12.1%), and initial graft dysfunction (n = 10; 30.3%). ABO incompatibility (P = .032; odds ratio [OR] 3.25), chronic rejection (P = .012; OR 4.76), and vascular complications (P = .046; OR 1.82) were significant variables associated with PSIC. Donor selection with ABO compatibility as well as early detection and management of chronic rejection and vascular complications may be important to prevet PSIC in LDLT.
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Schetzina JF, Harper RL, Han J, Hwang S, Giles NC, Lansari Y, Cook JW. Substitutionally Doped II–VI Semiconductor Films and Layered Structures. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-102-97] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
ABSTRACTPhotoassisted molecular beam epitaxy (PAMBE), in which the substrate is illuminated during film growth, is being employed in a new approach to controlled substitutional doping of II–VI compound semiconductors. Substitutional doping of these materials has been a long standing problem which has severely limited their applications potential. The PAMBE technique gives rise to dramatic changes in the electrical properties of as-grown epilayers. In particular, highly conducting n-type and p-type CdTe films have been grown using indium and antimony as n-type and p-type dopants, respectively. Double-crystal x-ray rocking curve data indicate that the doped epilayers are of high structural quality. Successful n-type doping of CdMnTe, a dilute magnetic semiconductor, with indium has also been achieved. Most recently, the photoassisted growth technique has been employed to prepare doped CdMnTe-CdTe quantum well structures and superlattices. In addition, HgCdTe films which exhibit excellent optical and electrical properties as well as exceptional structural perfection have been grown by the PAMBE technique.
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Hwang S, Kim KH, Song GW, Yu YD, Park GC, Kim KW, Choi NK, Park PJ, Choi YI, Jung DH, Ahn CS, Moon DB, Ha TY, Lee SG. Peritransplant monitoring of immune cell function in adult living donor liver transplantation. Transplant Proc 2011; 42:2567-71. [PMID: 20832545 DOI: 10.1016/j.transproceed.2010.04.040] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2009] [Accepted: 04/21/2010] [Indexed: 01/12/2023]
Abstract
PURPOSE We evaluated the clinical utility of peritransplant in vitro assays of immune cell function in adult living donor liver transplant (LDLT) recipients. METHODS In particular, we measured immune cell function, using the ImmuKnow assay, in 107 adult LDLT recipients and 200 potential living liver donors (control group) admitted to our center between July 2008 and January 2009. RESULTS In the control group, the mean proportion of T-helper/inducer cells was 36.8% ± 8.2%. The degree of immune response was strong in 12%, moderate in 77%, and low in 11%. In the study group, the degree of immune response within the first month was strong in 4.6%, moderate in 38.2%, and low in 57.2%, thus significantly lower than in the control group (P < .001). ImmuKnow results and tacrolimus levels did not show a significant correlation (r(2) = .002, P = .392). Although six patients showed biopsy-proven acute cellular rejection, none showed a strong immune response. Patients with overt infection showed a lower immune response. CONCLUSIONS These results indicate that peritransplant assessment of immune response using the ImmuKnow assay does not reliably predict the occurrence of acute rejection. Additional studies are necessary to accurately assess the clinical utility of immune response monitoring.
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Lee JY, Kim SB, Chang JW, Park SK, Kwon SW, Song KW, Hwang S, Lee SG. Comparison of the molecular adsorbent recirculating system and plasmapheresis for patients with graft dysfunction after liver transplantation. Transplant Proc 2011; 42:2625-30. [PMID: 20832557 DOI: 10.1016/j.transproceed.2010.04.070] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2009] [Revised: 01/04/2010] [Accepted: 04/08/2010] [Indexed: 12/22/2022]
Abstract
BACKGROUND Graft dysfunction after liver transplantation (OLT) is a life- threatening condition. Molecular adsorbent recirculating system (MARS) or plasmapheresis (PLP) may be effective supportive therapy of graft dysfunction for patients who cannot undergo retransplantation. The aim of this study was to compare the effects of MARS and PLP in patients with graft dysfunction after OLT. METHODS Between January 2002 and July 2007, 31 OLT recipients who experienced graft dysfunction, defined as hyperbilirubinemia (>10 mg/dL) without bile duct obstruction and/or presence of hepatic encephalopathy, were treated with MARS or PLP. Biochemical and hemodynamic data and survival were compared in MARS and PLP groups. RESULTS Fifteen patients were treated with 41 MARS sessions and 16 with 105 PLP sessions. After a single MARS session, patients showed significant reductions in creatinine, urea nitrogen, bilirubin, and ammonia. After a single PLP session, patients showed significant improvements in prothrombin time, bilirubin, alanine aminotransferase, alkaline phosphatase, and albumin. After the completion of treatment, Both MARS and PLP significantly improved bilirubin values. at 90 days there were no differences in overall survival rates; 53% in MARS versus 56% in PLP. CONCLUSION Both MARS and PLP are alternative supportive treatments for graft dysfunction after OLT.
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Kim SD, Lee JH, Lee JH, Kim DY, Choi Y, Lee SG, Hwang S, Lee KH. Tolerance Induction by Donor Chimerism After Hematopoietic Cell Transplantation From the Same Haploidentical Familial Donor in a Liver Transplant Recipient. Biol Blood Marrow Transplant 2011. [DOI: 10.1016/j.bbmt.2010.12.503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Hwang S, Oh KB, Lee HC, Yang BC, Lim D, Im GS, Woo JS, Park SB. 102 PROTEOMIC ANALYSIS OF CONDITIONED MEDIUM SUPPLEMENTED WITH PORCINE FOLLICULAR FLUID. Reprod Fertil Dev 2011. [DOI: 10.1071/rdv23n1ab102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Follicular fluid (FF) contains growth factors, electrolytes, hormones, amino acids, and unknown factors. Supplementation of porcine FF (pFF) to in vitro maturation (IVM) medium was reported to improve the oocyte maturation, monospermic fertilization and embryonic development. This study aimed at investigating whether pFF supplementation affects the characteristics of donor cells for somatic cell nuclear transfer and the proteomic composition of the culture medium. Ear fibroblast cells from an NIH major histocompatibility complex (MHC) inbred miniature pig were cultured with different culture methods: 1) DMEM + 10% FBS (FBS); 2) DMEM + 10% FBS + 10% pFF (pFF). The conditioned medium was collected at 72 h. After isoelectric focusing (IEF), the equilibrated strips were submitted to SDS-PAGE. Normalized protein spots were considered significantly different between the two groups if expression levels varied by two standard deviations. To identify the protein spots, an Ettan MALDI-TOF method was used. Upon submission of the amino acid sequences, proteins were identified by a homology search using ProteinInfo or BLAST search using the ExPASy Molecular Biology Server. The proportion of G0/G1 stage cells in the pFF group was significantly higher than the proportions in the other groups (P < 0.05). Among 42 differentially expressed spots, 36 proteins were identified in the pFF group. Some molecular functions of the spots were: catalytic or methytransferase activity, eukaryotic cell surface binding, or ferric iron binding. It can be concluded that pFF supplementation of culture medium positively affects cell-cycle synchronization and cell metabolism. Further studies are needed to analyse the function of these important cellular proteins.
This work received grant support from the Agenda Program (No. PJ006688) and (No. PJ007189), Rural Development Administration, Republic of Korea.
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Yang BC, Lee HC, Hwang S, Jeon IS, Lee DK, An JH, Noh EH, Han YJ, Kim EY, Hwang KC, Park SB. 202 KNOCK-DOWN AND DEVELOPMENTAL EFFICIENCY OF Arhgap15 GENE KNOCK-DOWN EMBRYOS. Reprod Fertil Dev 2011. [DOI: 10.1071/rdv23n1ab202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
The technique of RNA interference (RNAi) knock-down is a powerful tool for the analysis of gene function in mammalian cells and eggs. Rho GTPase-activating protein 15 (Arhgap15) is closely related to anaemia and immunity, especially as caused by trypanosome. This study was performed to investigate the effect of Arhgap15 gene knock-down on the developmental competence of bovine embryos in vitro. Bovine fibroblast cells were treated with 50 and 100 nM concentrations of Arhgap15 RNAi, respectively. After 24 h of transfection, the control group showed no change in Arhgap15 mRNA level, whereas mRNA expression in the RNAi-treated donor cells was obviously decreased in a dose-dependent manner. These RNAi-treated cells were then transferred into enucleated bovine oocytes to analyse the consequence of RNAi-mediated Arhgap15 gene knock-down. In the control group, cleavage and blastocyst development rates were 75% (102/136) and 14.7% (20/136), whereas those in the knock-down embryos were 81.6% (120/147) and 24.5% (36/147), respectively. The occurrence of cell death by apoptosis was examined in Day 7 blastocysts. Apoptotic cells numbered 12 ± 3.2 in control embryos and 8.9 ± 4.8 in knock-down embryos. Therefore, it can be concluded that RNAi-mediated Arhgap15 gene knock-down in somatic cells did not affect the developmental competence of bovine cloned embryos.
This work was supported by grant 120080401034062 from the BioGreen 21 Program, Rural Development Administration, Republic of Korea.
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Park J, Yoon S, Choi E, Ahn S, Lee S, Lee Y, Park K, Hwang S, Chang H, Kim J. Postoperative Radiotherapy for Gallbladder Cancer: Fifteen-year Experience at a Single Institution. Int J Radiat Oncol Biol Phys 2010. [DOI: 10.1016/j.ijrobp.2010.07.705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Hwang S, Yun CK, Lee DS, Kahng B, Kim D. Spectral dimensions of hierarchical scale-free networks with weighted shortcuts. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2010; 82:056110. [PMID: 21230548 DOI: 10.1103/physreve.82.056110] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2010] [Revised: 09/07/2010] [Indexed: 05/30/2023]
Abstract
Spectral dimensions have been widely used to understand transport properties on regular and fractal lattices. However, they have received little attention with regard to complex networks such as scale-free and small-world networks. Here, we study the spectral dimension and the return-to-origin probability of random walks on hierarchical scale-free networks, which can be either fractal or nonfractal depending on the weight of the shortcuts. Applying the renormalization-group (RG) approach to a Gaussian model, we obtain the exact spectral dimension. While the spectral dimension varies between 1 and 2 for the fractal case, it remains at 2, independent of the variation in the network structure, for the nonfractal case. The crossover behavior between the two cases is studied by carrying out the RG flow analysis. The analytical results are confirmed by simulation results and their implications for the architecture of complex systems are discussed.
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Cha K, Kim H, Hwang S, Park D, Lee K. 83: Cerebral Hemorrhage and Aortic Dissection for Differential Diagnosis of Non-Traumatic Out-of-Hospital Cardiac Arrest. Ann Emerg Med 2010. [DOI: 10.1016/j.annemergmed.2010.06.126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Hwang S, Chong SC. The effect of grouping on visual working memory. J Vis 2010. [DOI: 10.1167/10.7.767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Lee YT, Hwang S, Lee SG, Kim KW, Choi NK, Park GC, Yu YD, Yoo JW, Kim WS, Shim TS. Living-donor liver transplantation in patients with concurrent active tuberculosis at transplantation. Int J Tuberc Lung Dis 2010; 14:1039-1044. [PMID: 20626950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2023] Open
Abstract
SETTING Although active tuberculosis (TB) is a contraindication for liver transplantation (LT), LT may be the only possible treatment option in patients with irreversible liver failure and concurrent TB. OBJECTIVES To assess the outcome of LT in patients with concurrent TB and liver failure. METHODS We retrospectively evaluated the clinical outcomes of nine LT recipients with concurrent TB in Korea, an intermediate TB burden country. RESULTS The primary causes of living-donor LT (LDLT) in nine patients were anti-tuberculosis drug-induced fulminant hepatic failure (n = 4) and end-stage liver disease (n = 5). The sites of active TB were the lungs (n = 5), lymph nodes (n = 3) and pleura (n = 1). After LDLT, most patients were treated with less hepatotoxic drugs, including fluoroquinolones, ethambutol and cycloserine; none was treated with pyrazinamide. One patient experienced acute rejection, probably attributable to an interaction between rifampicin and cyclosporine. All nine patients, including one taking rifabutin, successfully completed anti-tuberculosis treatment and have been followed up for a median of 926 days after LDLT, without relapse of TB. CONCLUSION When properly managed, the prognosis of LDLT recipients with concurrently active TB at transplantation is very favourable. The current protocol, which considers active TB an absolute contraindication for LT, should be modified or relaxed, particularly for patients with LDLT.
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yu YD, Lee S, Hwang S, Kim K, Ahn C. FULMINANT HEPATITIS CAUSED BY CYTOMEGALOVIRUS INFECTION IN AN IMMUNOCOMPETENT ADULT REQUIRING LIVER TRANSPLANTATION: REPORT OF A CASE. Transplantation 2010. [DOI: 10.1097/00007890-201007272-01681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Hwang S, Yu Y, Park G, Park P, Choi Y, Choi N, Kim K, Song G, Jung D, Yun J, Choi S, Lee S. Bioelectrical Impedance Analysis for Evaluation of Donor Hepatic Steatosis in Living-Donor Liver Transplantation. Transplant Proc 2010; 42:1492-6. [DOI: 10.1016/j.transproceed.2010.03.137] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2010] [Accepted: 03/10/2010] [Indexed: 11/15/2022]
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Ryoo B, Yoon D, Ryu M, Lee S, Hwang S, Suh D, Lee J, Kim T, Chang H, Kang Y. Sorafenib for recurrent hepatocellular carcinoma after liver transplantation. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.e14669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Jeong WK, Kim KW, Kim MY, Shin YM, Kim PN, Kim Y, Song GW, Ha TY, Hwang S, Lee SG. Increase of modified retrograde to antegrade flow ratio on doppler ultrasounds of the hepatic vein indicating tricuspid regurgitation during follow-up of liver transplantation: correlation with echocardiographic results. Transplant Proc 2009; 41:4238-42. [PMID: 20005376 DOI: 10.1016/j.transproceed.2009.07.110] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2008] [Accepted: 07/28/2009] [Indexed: 11/15/2022]
Abstract
The purpose of this study was to explore the best parameter of hepatic vein (HV) Doppler ultrasounds (DUS) that correlated with echocardiographic findings of and particularly the optimal cutoff value for tricuspid regurgitation (TR) following liver transplantation (LT). Thirty-six patients underwent echocardiography and DUS after LT from January 2006 to July 2007. Echocardiographic records were searched for TR grade and peak velocity of TR flow. The HV DUS parameters included peak velocity of retrograde flow (R), peak velocity of antegrade flow (A), the difference between R and A (R-A), the ratio of R to A (R/A ratio), and a modified R/A ratio, namely, the product of the R/A ratio and the R/A duration ratio. Correlation tests and receiver-operator characteristic analyses explored their interrelations and to obtained cutoff values to diagnose moderate and severe TR. TR grade best correlated with the modified R/A ratio (rho = 0.585), followed by the R/A ratio (rho = 0.503) and R (rho = 0.455). The modified R/A ratio was the most accurate parameter for the diagnosis of moderate and severe TR (Az = 0.825 and 0.895, respectively); its cutoff value was > or =0.11 for moderate TR (sensitivity and specificity both 77.78%) and 0.13 for severe TR (sensitivity, 100%; specificity, 81.2%). The modified R/A ratio best correlated with echocardiographic results of TR, although the strength of correlation was only moderate. Additionally, the modified R/A ratio was an accurate DUS parameter to diagnose moderate and severe TR among patients following LT.
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Chang E, Zeidler K, Foster R, Peled A, Hwang S, Ewing C, Alvarado M, Esserman L. Oncoplastic Approach for Reconstruction of Large Partial Mastectomy Defects Using Reduction Mammoplasty in Large Breasted Women. Cancer Res 2009. [DOI: 10.1158/0008-5472.sabcs-09-4125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Women with large breast tumors are often treated with mastectomy as their definitive operation. However, women with large breasts can have a significant resection and still achieve an excellent aesthetic outcome if the partial mastectomy is combined with a reduction mammoplasty. It is not clear if the limitation for breast conservation should be made based on tumor size, or on the basis of the volume of tissue that needs to be resected relative to the total volume of breast tissue. Our study aims to assess the oncologic safety and cosmetic outcome of large partial mastectomies in large breasted women combined with reduction mammoplasty.Materials and Methods: All patients undergoing partial mastectomy and reduction mammoplasty performed at the University of California San Francisco were included. Medical records were reviewed for demographics, breast cancer data, oncologic and reconstructive operations, postoperative recurrences, complications, and need for additional operations.Results: Sixty-five patients undergoing partial mastectomy and reduction mammoplasty reconstruction were identified. Average tumor size was 2.8 cm (range 0.6 cm to 8.9 cm). The stage distribution for 63 patients was stage 0 (n=11), I (n=15), II (n=24), III (n=10), and IV (n=3), and 2 patients had Phylloides tumor. Twenty-five patients had neoadjuvant therapy, followed by breast reduction as their primary resection once chemotherapy was completed. Twenty patients (30.8%) required re-excision, four of whom required multiple re-excisions. Fifty nine patients (90.8%) were successfully treated with our approach, while 6 patients (9.2%) required completion mastectomy for their definitive resection, based on margin status after initial resection. There were a total of two recurrences, one in a patient who had a local DCIS recurrence after initial presentation with stage 0 disease and one in a patient who presented with metastatic disease. The patient with stage 0 disease and subsequent recurrence did not have radiation; the other patient presented initially with synchronous metastatic disease, had a poor response to chemotherapy, and her local recurrence occurred simultaneously with progression of distant disease. Of the patients with stage 0-III disease, the recurrence rate was 1.6% with a mean follow-up of 13 months. Eleven patients (15.9%) developed postoperative complications, including fat necrosis (n=1), hematoma (n=1), cellulitis (n=2), seroma (n=3), and wound healing complications (n=4). Despite complications and radiation therapy, all patients were exceptionally pleased with their reconstruction.Conclusion: Partial mastectomy with reduction mammoplasty breast reconstruction is a viable option that combines a safe oncologic procedure with immediate breast reconstruction. While further follow-up is needed, it is a viable alternative to mastectomy, enabling breast conservation and correction of significant breast redundancy and ptosis, which can impair the efficacy of radiation therapy. Prospective data collection should continue for these cases to establish the long term outcomes of large-breasted patients undergoing partial mastectomy and reduction mammoplasty.
Citation Information: Cancer Res 2009;69(24 Suppl):Abstract nr 4125.
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Hwang S, Lee S, Jeong J, Lee H. Adjuvant!, Really Optimal for Korean Early Breast Cancer Patients? Validation in a Single Institution in Korea. Cancer Res 2009. [DOI: 10.1158/0008-5472.sabcs-09-6044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Purpose: Adjuvant! (www.adjuvantonline.com) is a widely used web-based program that predicts tailored estimates of 10-year mortality and recurrence risks, and the benefit of adjuvant systemic treatment in early breast cancer. But, in Korea, it had not been used routinely yet to decide to choice for adjuvant therapy. Because Adjuvant! was mainly designed with the Surveillance, Epidemiology, and End-Results (SEER) registry in the United States, it is maybe unreasonable that apply to early breast cancer in Korea without proper validation. This study is planned to validate Adjuvant! program with a data of a single institution in Korea.Methods: Using the Gangnam Severance Hospital database, clinical characteristic, pathologic, and treatment data of 272 patients who diagnosed between 1991 and 1998 with stage I, II breast cancer (total 555 patients) were selected with criteria that less than 10-years of follow-up (n=283) was excluded. And they were calculated for predicted 10-year overall survival (OS), breast cancer-specific survival (BCSS), and event-free survival (EFS) for each patient with Adjuvant! (8.0 version). Also the observed outcomes at 10 years were estimated.Results: Among all 272 patients, the differences of 10-year predicted and observed outcomes were 15.8% (78.8-63.0), 12.4% (78.8-66.4), 12.7% (67.8-55.1) for OS, BCSS, EFS, respectively (all P<.05). Almost subgroups had statistically significant differences between predicted and observed values. Only the subgroup that did not treated by the postoperative radiotherapy had not difference (P>.05). The difference (5.1%) of predictive OS values between the 10-years survival group (184 patients) and dead group (88 patients), the difference (-6.4%) of predictive BCSS values between the 10-years breast specific died group (79 patients) and the others (193 patients), and the difference (4.4%) of predictive EFS values between the 10-years event free survivor group (156 patients) and the others (116 patients) had statistically significant, all. Because of the enormous differences between the predictive outcomes by Adjuvant! and the observed outcomes, we had to verify the differences by comparing outcomes with the Cox's proportional hazards model. The 10-years OS, BCSS, EFS derived by the Cox's model were statistically different with the results by Adjuvant! (all P<.05). More powerful with Adjuvant! to predict the survival rate in who had lived, and more with the Cox's model, to estimate the mortality rate in who had died.Conclusion: The predictive 10-years OS, BCSS, EFS by Adjuvant! for patients who had been diagnosed, treated in Gangnam Severance Hospital as early breast cancer had an enormous differences with the observed outcomes. So it would be inappropriate to apply Adjuvant! with Korean early breast cancer patients. However, there was limitations of this study that used relatively small population for validation of Adjuvant! in a single institution. Therefore, the progress of the further validation study with an adequate population in multi-center will be needed.
Citation Information: Cancer Res 2009;69(24 Suppl):Abstract nr 6044.
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Lee S, Hwang S, Jeong J, Kim S, Son E, Ryu Y, Jung W, Lee H. Sentinel Lymph Node Biopsy in Patients Who Have Negative Conversion of Axillary Lymph Node after Neoadjuvant Chemotherapy for Node Positive Breast Cancer. Cancer Res 2009. [DOI: 10.1158/0008-5472.sabcs-09-1022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Sentinel lymph node biopsy (SLNB) after neoadjuvant chemotherapy (NAC) has been currently debatable. It is possible that the tumor response to chemotherapy may alter the lymphatic drainage thus causing lower SLN identification rate and higher false negative rate. Further, the response of NAC can be different in each lymph nodes. It is doubtful whether SLNB can accurately predict axillary lymph node (ALN) status after NAC. The aim of this study to determine the identification rate, the false-negative rate, and the accuracy of SLNB after NAC for node positive breast cancer.Patients and Methods: A prospective study was initiated to evaluate the results of SLNB after NAC. From January 2007 to April 2009, 81 patients with positive axillary lymph nodes enrolled from two institutions after IRB-approved. They received NAC and then evaluated negative conversion of metastatic lymph node with both PET and breast US. All of them underwent ALN dissection after SLNB with subareolar intradermal injection technique using radioisotope. We evaluated the identification rate, false negative rate, accuracy of SLNB according to the response of chemotherapy in axillary lymph nodes (negative conversion group or remaining positive group).Results: Before the NAC, 31 patients had multiple axillary lymph node metastasis and 50 patients had single metastasis. After NAC 44 cases (54.3%) turned into negative node and 37 cases (45.7%) remained positive nodes. Total identification rate was 80.2% (65 of 81), false negative rate was 19.0% (8 of 42) and accuracy was 87.7% (57 of 65). In negative conversion group showed 84.1% (37 of 44) of identification rate, 21.1% (4 of 19) of false negative rate, 89.2% (33 of 37) of accuracy. In remaining positive group revealed 75.7% (28 of 37) of identification rate, 17.4% (4 of 23) of false negative rate, 85.7% (24/28) of accuracy. There was no statistical significant difference of identification rate, false negative rate, accuracy of SLNB among the two group after NAC (p=0.343, p=0.534, p=0.478, respectively).Conclusion: This study showed relatively low detection rate and accuracy, high false-negative rate of SLNB, even if the positive nodes changed to negative node after NAC. Thus sentinel lymph node biopsy after NAC for node positive breast cancer should be cautious. Since this study had small number of negative conversion patients, further larger prospective studies are required for more proper conclusion.
Citation Information: Cancer Res 2009;69(24 Suppl):Abstract nr 1022.
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Choi YJ, Hwang KC, Park JY, Park KK, Kim JH, Park SB, Hwang S, Park H, Park C, Kim JH. Identification and characterization of a novel mouse and human MOPT gene containing MORN-motif protein in testis. Theriogenology 2009; 73:273-81. [PMID: 19913896 DOI: 10.1016/j.theriogenology.2009.09.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2009] [Revised: 09/07/2009] [Accepted: 09/07/2009] [Indexed: 11/30/2022]
Abstract
A novel testis-derived membrane occupation and recognition nexus (MORN)-motif protein was identified in mouse testis (MOPT) by subtraction screening methods and found to be localized on chromosome 17E3, spanning approximately 7kb. Sequence analysis showed that MOPT contains 669 base pair nucleotides of open reading frame and the corresponding 79 amino acids. The protein is predicted to have theoretical molecular mass of 9000 Da and an expected isoelectric point of 5.8 and seems to have unique sequences except for MORN-motif domain. The transcript of MOPT is highly and specifically expressed in adult testis as well as skeletal muscle. Moreover, MOPT transcript and protein are confined mainly to round and elongated spermatids, except for a few individual dispersed spermatocytes, and increase in abundance at subsequent stages. MOPT first appeared in the proacrosomic vesicles of the early Golgi phase spermatids and was translocated from the head cap of elongated spermatid to the nucleus of mature spermatozoa at the final stage of spermiogenesis. Our study suggests that MOPT may play an important role in dynamic regulation of acrosome biogenesis during late spermiogenesis.
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Hong J, Chung JK, Kang B, Kim A, Hwang S, Lee M, Park K, Cheon DS. PX-9 Enhanced-diagnostic method for enteroviruses detection RT-PCR assay using complementary locked primer technology. J Clin Virol 2009. [DOI: 10.1016/s1386-6532(09)70231-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Hwang S, Choi G, Choi S. The effects of therapeutic music listening on the pain relief for the patients with burn. Burns 2009. [DOI: 10.1016/j.burns.2009.06.123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Hwang S, Choi G, Seo C, Jang K. A study on the effectiveness of group counseling program for empowerment of burn patients. Burns 2009. [DOI: 10.1016/j.burns.2009.06.122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Lee D, Kim M, Oh B, Lee H, Park H, She C, Kim T, Hwang S, Yang I, Yoon S, Yoon J. C009 Pyrosequencing reveals the quantity of p15INK4b methylation has correlation with cytopenia, marrow blast percentage and survival in myelodysplastic syndromes. Leuk Res 2009. [DOI: 10.1016/s0145-2126(09)70047-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Kim BS, Lee SG, Hwang S, Ahn CS, Kim KH, Moon DB, Ha TY, Song GW, Jung DH. Influence of pretransplantation bacterial and fungal culture positivity on outcome after living donor liver transplantation. Transplant Proc 2009; 41:250-2. [PMID: 19249527 DOI: 10.1016/j.transproceed.2008.10.033] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2008] [Revised: 09/09/2008] [Accepted: 10/29/2008] [Indexed: 01/29/2023]
Abstract
BACKGROUND Bacterial and fungal infections are serious complications in patients with cirrhosis and are among the main causes of morbidity and mortality. The effects of pretransplantation infection on the outcome after orthotopic liver transplantation (OLT), however, have not been fully described. OBJECTIVE To assess the influence of pretransplantation infection on OLT by analyzing the clinical profiles of liver recipients with preexisting bacterial or fungal infection. PATIENTS AND METHODS We retrospectively reviewed the medical records of 223 adult patients who underwent living donor OLT between October 1, 2005, and September 30, 2006. In all patients, routine blood culture, was performed, and in patients with suspected bacterial or fungal infection; sputum, urine, and ascitic fluid cultures were performed. RESULTS Of 223 patients, 37 (16.6%) had a positive culture in one or more samples. Culture-positive and culture-negative groups differed significantly in end-stage liver disease score but showed no differences in Child-Turcotte-Pugh score, existence of spontaneous bacterial peritonitis, hemodialysis, or duration of stay in the intensive care unit or hospital. Six of 37 patients with positive cultures (16.2%) and 4 (2.2%) of 186 patients with negative cultures (2.2%) died during the first 90 days after OLT (P = .007). The causes of death among culture-positive patients were brain edema (n = 2), brain hemorrhage (n = 1), hepatic dysfunction (n = 1), and sepsis (n = 2), whereas all 4 culture-negative patients died of infectious complications. CONCLUSION Prompt OLT accompanied by adequate antibiotic or antifungal therapy may be acceptable in patients with preexisting bacterial or fungal infection unless there are overt manifestations of active infection.
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