S W Kim

Catholic University of Korea, Seoul, Seoul, South Korea

Are you S W Kim?

Claim your profile

Publications (112)284.79 Total impact

  • Article: Clinical characteristics and insulin-independency of new-onset Korean type 2 diabetics presenting with diabetic ketoacidosis.
    [show abstract] [hide abstract]
    ABSTRACT: BACKGROUND: We evaluated the incidence, characteristics, and insulin-independency of newly diagnosed Korean type 2 diabetes (T2D) initially presenting with diabetic ketoacidosis (DKA). METHODS: We analyzed clinical and biochemical data from diabetic patients presenting with DKA. They were classified into ketosis-prone diabetes (KPD)-T1A (A + β-), KPD-T1B (A - β-), KPD-T2A (A + β+) or KPD-T2B (A - β+) according to the presence or absence of autoantibody and β-cell reserve. Changes in therapy after insulin discontinuation were evaluated for up to 4 years. We also compared clinical and biochemical characteristics between newly diagnosed T2D presenting with DKA and previously-diagnosed T2D presenting with DKA. RESULTS: Among 60 newly diagnosed KPD patients, 18, 21, and 21 patients were classified as KPD-T1A, KPD-T1B, and KPD-T2B, respectively. In the KPD-T2B group, both fasting and stimulated C-peptide recovered over 6 months. After 4 years of DKA development, 75% of KPD-T2B subjects no longer required insulin. Compared to previously diagnosed T2D patients presenting with DKA, newly diagnosed KPD-T2B patients tended to be younger, more obese, and showed better insulin secretory function after recovery from DKA. CONCLUSIONS: New-onset T2D presenting with DKA was not uncommon among the Korean population. In contrast to previously-diagnosed T2D patients presenting with DKA who showed a progressive decrease in insulin secretory function, new-onset KPD-T2B patients recovered insulin secretory function over time, and insulin independence could be expected. This article is protected by copyright. All rights reserved.
    Diabetes/Metabolism Research and Reviews 05/2013; · 3.37 Impact Factor
  • Article: How safe and effective is routine left hand-assisted laparoscopic donor nephrectomy with multiple renal arteries? A high-volume, single-center experience.
    [show abstract] [hide abstract]
    ABSTRACT: We investigated the safety and effectiveness of routine harvest of the left kidney for renal transplantation regardless of the presence of multiple renal arteries to obtain the longer renal vein. Between February 2000 and July 2008, 325 patients underwent left hand-assisted laparoscopic living donor nephrectomy. The true renal arterial anatomy as evaluated intraoperatively was compared with the renal arterial anatomy by computed tomography (CT). We compared the results for the patients with a single renal artery (group I) with the patients with multiple renal arteries (group II) in terms of the donor and recipient outcomes. Multiple renal arteries in left kidney were identified in 86 patients (26.5%). Thirty-seven CTs (11.4%) were in discord with the renal arterial anatomy evaluated intraoperatively. There was no difference in age, gender, body mass index, estimated blood loss, complication rate, or length of hospital stay between the 2 groups in the donor. Although the warm ischemic time and the operation time were significantly longer in group II (P = .008 and .001), overall graft survival was similar between the groups. Routine harvest of the left kidney can be performed safely and effectively for the donor and recipient, even in the presence of multiple renal arteries.
    Transplantation Proceedings 12/2012; 44(10):2913-7. · 1.00 Impact Factor
  • Article: The clinical characteristics of gastroesophageal reflux disease in patients with laryngeal symptoms who are referred to gastroenterology.
    [show abstract] [hide abstract]
    ABSTRACT: The prevalence of gastroesophageal reflux disease (GERD) has increased recently in Asia-Pacific countries. However, little is known about its prevalence and clinical characteristics in GERD patients with atypical symptoms in Asia. The aim of this study was to investigate the clinical characteristics of GERD in patients who had laryngeal symptoms in Korea. Data were gathered retrospectively from patients who presented with atypical symptoms, such as throat discomfort, globus pharyngeus, hoarseness, and chronic cough. They underwent a 24-hour ambulatory intraesophageal pH monitoring and filled in a validated reflux questionnaire. Overall, 128 patients (36 men and 92 women) with laryngeal symptoms were included. Of these 128, 43 patients (34%) had erosive esophagitis or pathological reflux from 24-hour ambulatory pH monitoring, and 24 (19%) had a positive Bernstein test or positive symptom index from 24-hour pH monitoring. Sixty-one patients (48%) had no evidence of reflux esophagitis on upper endoscopy and pathological acid reflux on 24-hour pH monitoring. Fifty-six patients (44%) had weekly heartburn or regurgitation. Typical symptoms and dyspepsia were significantly more common in patients with GERD who had laryngeal symptoms than non-GERD. Fifty-two percent of patients had laryngeal symptoms that were associated with GERD. The presence of typical reflux symptoms and dyspepsia are risk factors for GERD in patients who present with laryngeal symptoms.
    Diseases of the Esophagus 07/2012; · 1.81 Impact Factor
  • Article: Fatigue crack growth in 2024 aluminum alloy with inhomogeneous solidification microstructure
    S. W. Kim, S. W. Han, J. H. Zong
    [show abstract] [hide abstract]
    ABSTRACT: This study reports the investigation of the fatigue crack growth behavior in 2024 aluminum alloy billets manufactured using the direct chill casting (DCC) and electromagnetic casting (EMC). It was expected that the billets produced from these different casting procedures would vary in terms of their microstructure. Therefore, they should exhibit different fatigue crack growth behavior. The results showed that, the structure of the middle center portion of both billets is not homogeneous and relatively coarse, while the structure of the center and edge portions is homogeneous compared with the structure of the middle center portion. As fatigue crack growth extended through many grains having different morphologies, it became unstable through the overall crack path, and the Paris zone almost disappeared. The effects of 5% rolling and commercially rolled DCC billets on the fatigue crack growth rate were also investigated. Striations were enhanced around Al2Cu particles refined by commercial rolling, and fatigue crack growth was stable until large crack length.
    Metals and Materials International 05/2012; 11(6):443-448. · 1.18 Impact Factor
  • Article: Prognostic significance of tumour location after adjuvant chemoradiotherapy for periampullary adenocarcinoma.
    [show abstract] [hide abstract]
    ABSTRACT: To analyse the outcome of adjuvant chemoradiotherapy for periampullary adenocarcinoma and the impact of tumour location as a prognosticator. Between January 1991 and December 2002, 147 patients with periampullary cancer underwent adjuvant chemoradiotherapy after pancreaticoduodenectomy. Postoperative radiotherapy was delivered to tumour bed and regional lymph nodes up to 40 Gy at 2 Gy/fraction with a two-week planned rest. Intravenous 5-fluorouracil (500 mg/m(2)/day) was given on days 1-3 of each split course. The median follow-up period was 82 months in survivors. Tumour >2 cm and margin-positivity were more common in patients with pancreatic cancer than nonpancreatic periampullary cancers (p<0.0001 and 0.0780, respectively). According to the tumour location, 5-year overall survival rates of ampulla of Vater, distal common bile duct, duodenal and pancreatic head cancers were 53.0%, 50.3%, 37.5%, and 13.0%, respectively (p<0.0001). On multivariate analysis, pancreatic location (p<0.0001) and nodal involvement (p=0.0123) were associated with inferior overall survival. Regardless of its advanced histologic features, pancreatic location itself was an adverse prognostic factor affecting overall survival.
    Clinical and Translational Oncology 05/2012; 14(5):391-5. · 1.33 Impact Factor
  • Article: Postoperative chemoradiotherapy for gallbladder cancer.
    [show abstract] [hide abstract]
    ABSTRACT: The goal of this work was to analyze the outcome of adjuvant chemoradiotherapy for patients with gallbladder cancer who underwent surgical resection and to identify the prognostic factors for these patients. Between August 1989 and November 2006, 47 patients with gallbladder cancer underwent surgical resection followed by adjuvant radiotherapy. There were 21 males and 26 females, and median age was 60 years (range 44-75 years). Postoperative radiotherapy was delivered to the tumor bed and regional lymph nodes up to 40-50 Gy at 2 Gy/fraction; 41 patients also received intravenous 5-fluorouracil as a radiosensitizer. Median follow-up duration was 48 months for survivors. There were 2 isolated locoregional recurrences, 14 isolated distant metastases, and 7 combined locoregional and distant relapses. The 5-year overall survival rate was 43.7%. According to the extent of resection, the 5-year overall survival rates were 52.8%, 20.0%, and 0% in R0-, R1-, and R2-resected patients, respectively (p = 0.0038). On multivariate analysis incorporating extent of resection, T stage, N stage, performance of lymph node dissection, and histologic differentiation, extent of resection was the only prognostic factor associated with overall survival (p = 0.0075). Among the 37 patients with R0 resection, there was no difference of 5-year overall survival rates in patients with N0, N1, and Nx diseases (46.2%, 60.0%, and 44.4%, respectively, p = 0.6246). As for significant treatment-related morbidity, there was only 1 patient with grade 4 gastric ulcer. Adjuvant chemoradiotherapy after R0 resection can achieve a good long-term survival rate in gallbladder cancer patients, even in those with lymph node metastases, and may play a role for patients who underwent R0 resection of primary tumor without lymph node dissection.
    Strahlentherapie und Onkologie 03/2012; 188(5):388-92. · 3.56 Impact Factor
  • Article: Resumption or persistence of menstruation after cytotoxic chemotherapy is a prognostic factor for poor disease-free survival in premenopausal patients with early breast cancer.
    [show abstract] [hide abstract]
    ABSTRACT: We investigated the relationship between resumption or persistence of menstruation after cytotoxic chemotherapy (RM) and disease-free survival (DFS) in premenopausal patients with early breast cancer. Medical records from 872 patients who received cytotoxic chemotherapy for stage I to III breast cancer were retrospectively reviewed. The median patient age was 41 years (range, 21-54) and the median follow-up duration was 6.2 years (range, 0.7-10.4). Six hundred ninety-two patients (79.4%) were hormone receptor (HR) positive and the majority of these received tamoxifen therapy after completing chemotherapy. The chemotherapy-induced amenorrhea (CIA) rate was 76.7% (n = 669), and 51.8% (n = 452) experienced RM during the follow-up period. One hundred twenty-one (13.9%) patients had persistent menstruation without CIA. DFS was significantly affected by younger age at diagnosis (≤35 years) (P = 0.013), tumor size > 2 cm (P < 0.001), node positivity (P < 0.001), HR negativity (P < 0.001), HER2 positivity (P = 0.010), and RM (P < 0.001). HR negativity [hazard ratio 1.7, 95% confidence interval (CI) 1.2-2.4, P = 0.006], tumor size > 2 cm (hazard ratio 2.1, 95% CI 1.4-3.0, P < 0.001), node positivity (hazard ratio 3.0, 95% CI 2.0-4.7, P < 0.001), and RM (hazard ratio 1.8, 95% CI 1.2-2.7, P = 0.004) remained significant factors for DFS on multivariate analysis. A considerable proportion of premenopausal patients treated with chemotherapy experienced RM after CIA. RM was a poor prognostic factor for DFS in premenopausal patients with early breast cancer.
    Annals of Oncology 02/2012; 23(9):2283-9. · 6.43 Impact Factor
  • Article: [Increased expression of hypoxia-inducible factor-1α and connective tissue growth factor accompanied by fibrosis in the rat testis of varicocele].
    [show abstract] [hide abstract]
    ABSTRACT: We investigated hypoxia inducible factor-1α (HIF-1α), connective tissue growth factor (CTGF) expression and fibrosis in the testis of rats with surgically induced varicocele. A total of 47 adult male Sprague-Dawley rats were arranged in 3 groups, namely group 1 (varicocele operation 4 weeks ago, n=10; sham operation 4 weeks ago, n=5), group 2 (8 weeks, n=11; n=5), and group 3 (12 weeks, n=11; n=5). The rats in every group underwent bilateral orchiectomy 4, 8, and 12 weeks after the operations, respectively. HIF-1α and CTGF expression of both testes in group 3 were studied by real-time reverse transcription-polymerase chain reaction (RT-PCR) and immunohistochemistry. Fibrotic change was assessed by quantitative image analysis. HIF-1α mRNA expression in testes tissues in varicocele operation and sham controls showed no significant differences in RT-PCR. However, CTGF mRNA expressions in left testes were found to be significantly different between varicocele operation and sham controls. HIF-1α staining was present in both testes of all specimens and CTGF staining was present in 10 left and 8 right testes of 11 specimens. However HIF-1α and CTGF staining were absent in control group. There were significant fibrotic changes of both testes in groups 2 and 3. There were significant differences in fibrotic change along the durations of surgical varicocele. This study reveals that experimental varicocele in the rat is associated with HIF-1α and CTGF expression and it is accompanied by fibrotic change in the testis.
    Actas urologicas españolas 01/2012; 36(5):282-8. · 0.46 Impact Factor
  • Article: Comparison of bolus transit patterns identified by esophageal impedance to barium esophagram in patients with dysphagia.
    [show abstract] [hide abstract]
    ABSTRACT: Bolus transit through the esophagus has not been validated by videoesophagram in patients with dysphagia and changes in impedance with abnormal barium transit have not been described in those patients. The aim of this study was to compare esophageal impedance findings with barium esophagram measurements in patients with dysphagia. The consecutive patients with dysphagia underwent conventional multichannel esophageal impedance manometry, after which a barium videoesophagram was performed simultaneously with multichannel esophageal impedance manometry using a mean of three swallows of barium. Esophageal emptying patterns shown in the esophagogram were classified by the degree of intraesophageal stasis and presence of intraesophageal reflux. Bolus transit patterns in impedance were classified as complete and incomplete transit. Sixteen patients (M : F = 8 : 8, mean age, 47 years) were enrolled. Their manometric diagnosis were normal (n= 6), ineffective esophageal motility (n= 1), diffuse esophageal spasm (DES; n= 2), and achalasia (n= 7). Sixty-three swallows were analyzed. According to impedance analysis, 21/22 swallows with normal barium emptying showed complete transit (96%) and 31/32 swallows with severe stasis showed incomplete transit (97%). Nine swallows with mild stasis showed either complete or incomplete transit patterns in impedance. Swallows with mild barium stasis and complete transit in impedance were observed in patients who had received treatment (two patients with achalasia with history of esophageal balloonplasty and a patient with DES after nifedipine administration). Impedance reflected severe stasis with retrograde barium movement and described typical bolus transit patterns in patients with achalasia and DES. In conclusion, impedance-barium esophagram concordance is high for swallows with normal esophageal emptying and for severe barium stasis in patients with dysphagia.
    Diseases of the Esophagus 06/2011; 25(1):17-25. · 1.81 Impact Factor
  • Article: Optimal timing of G-CSF administration for effective autologous stem cell collection.
    [show abstract] [hide abstract]
    ABSTRACT: The best time of G-CSF administration for PBPC collection remains to be defined. We aimed to identify optimal G-CSF administration timing for efficient autologous stem cell collection. A total of 262 lymphoma or multiple myeloma patients, who underwent PBPC collection from January 2000 to March 2008, were included. PBPCs were mobilized with chemotherapy followed by lenograstim at 10 μg/kg/day. Patients received lenograstim at 2000 hours, about half a day before leukapheresis (PM group) before November 2004, and at 0600 hours, 3 h before apheresis (AM group) subsequently. In the AM group, the median number of total collected CD34+ cells/kg was greater over a shorter duration of apheresis, and the median number of collected CD34+ cells/kg at first leukapheresis was larger. Stem cell collection efficacy (ratio of total collected CD34+ cells/kg per number of leukapheresis procedures) was higher, and proportion of patients who yielded an optimum harvest was larger. The statistically significant between-group difference was observed only in patients with high-dose CY chemotherapy for stem cell mobilization in subgroup analysis. The present study showed that G-CSF injection 3 h before apheresis improved the efficacy of autologous stem cell collection.
    Bone marrow transplantation 06/2011; 46(6):806-12. · 3.00 Impact Factor
  • Article: Low-power programmable divider with a shared counter for frequency synthesiser
    K.-Y. Kim, Y.-J. Min, S.-W. Kim, J. Park
    [show abstract] [hide abstract]
    ABSTRACT: A low-power programmable divider (PD) for frequency synthesiser is presented in this study. Instead of two counters used in conventional PD, a shared counter with a small control circuit is exploited in order to reduce the output load capacitance and the redundant counter operations in the divider. A novel glitchless D flip-flop is also proposed by considering the switching activities of the internal nodes of the flip-flop. The authors' proposed PD was fabricated in a standard 0.18-μm complementary metal-oxide-semiconductor (CMOS) technology. The average power is 3.23 mW with 1.5 V supply voltage and the effective area is 0.0408 mm<sup>2</sup>. Its division ratio ranges from 13 to 1278 at 3.5 GHz. Experimental results show that the proposed divider consumes around 30 less power compared to the conventional design.
    IET Circuits Devices & Systems 06/2011; · 0.55 Impact Factor
  • Article: A multicenter, randomized, placebo-controlled, double-blind phase II trial evaluating the optimal dose, efficacy and safety of LC 15-0444 in patients with type 2 diabetes.
    [show abstract] [hide abstract]
    ABSTRACT: The objective of this study was to evaluate the optimal dose, efficacy and safety of a novel dipeptidyl peptidase-4 (DPP-IV) inhibitor, LC15-0444, in Korean subjects with type 2 diabetes mellitus treated by diet and exercise. This study was a double-blind, randomized, multicenter and parallel-group, dose-range finding study. We enrolled 145 patients (91 men and 54 women) with a median age of 53 years and a median body mass index of 25.1 kg/m(2) . The median baseline fasting plasma glucose (FPG) was 8.1 mmol/l, the median HbA1c was 7.9% and the median time since the diagnosis of diabetes was 3 years. After 2 weeks of an exercise/diet programme followed by 2 weeks of a placebo period, the subjects were randomized to one of the four following groups for a 12-week active treatment period: placebo and 50, 100 or 200 mg of LC15-0444. All three doses of LC15-0444 significantly reduced the HbA1c from baseline compared to the placebo group (-0.06 vs. -0.98, -0.74 and -0.78% in the placebo and 50, 100 and 200 mg groups, respectively), without a significant difference between the doses. Subjects with a higher baseline HbA1c (≥8.5%) had a greater reduction in HbA1c. Insulin secretory function, as assessed using homeostasis model assessment-beta cell, C-peptide and the insulinogenic index, improved significantly with LC15-0444 treatment. Insulin sensitivity, as assessed using homeostasis model assessment-insulin resistance, also improved significantly after 12 weeks of treatment. The 50 and 200 mg groups had significantly reduced total cholesterol and low-density lipoprotein cholesterol levels at 12 weeks compared to the placebo group. No dosage of LC15-0444 affected weight or waist circumference. The incidences of adverse events were similar in all study subjects. LC15-0444 monotherapy (50 mg for 12 weeks) improved the HbA1c, FPG level, oral glucose tolerance test results, β-cell function and insulin sensitivity measures, and was well tolerated in Korean subjects with type 2 diabetes.
    Diabetes Obesity and Metabolism 12/2010; 12(12):1113-9. · 3.38 Impact Factor
  • Article: Increased incidence of colorectal malignancies in renal transplant recipients: a case control study.
    [show abstract] [hide abstract]
    ABSTRACT: This study was to evaluate the frequency of colorectal neoplasia in renal transplant recipients and to investigate the association with Epstein-Barr virus (EBV) and cytomegalovirus (CMV) infection. We compared the frequency of colorectal neoplasia among renal transplant recipients with that of the healthy subjects. Specimens of colorectal neoplasia were examined for EBV and CMV using in situ hybridization and immunohistochemistry, respectively. Of 796 renal transplantation cohorts, 315 were enrolled. The frequency of colorectal neoplasia among the patients was 22.9%. Compared with the healthy subjects, the odds ratio (OR) for advanced adenoma was 3.32 (95% CI, 1.81-6.10). The frequency of cancer among the patients was 1.9% (OR, 12.0; 95% CI, 1.45-99.7). A long interval between transplantation and colonoscopy was a significant factor in the development of advanced colorectal neoplasia. EBV positivity was detected in 30.6% of colorectal neoplasia specimens from renal transplant recipients, which was higher than that for the controls (p = 0.002). CMV was not detected in any lesions of patients or controls. In conclusion, renal transplant recipients have a significantly increased risk of advanced colorectal neoplasia. EBV was more frequently found in specimens of advanced colorectal neoplasm obtained from the renal transplant recipients.
    American Journal of Transplantation 09/2010; 10(9):2043-50. · 6.39 Impact Factor
  • Conference Proceeding: Stack friendly all-oxide 3D RRAM using GaInZnO peripheral TFT realized over glass substrates
    [show abstract] [hide abstract]
    ABSTRACT: This paper reports on new concept consisting of all-oxide-based device component for future high density non-volatile data storage with stackable structure. We demonstrate a GaInZnO (GIZO) thin film transistors (TFTs) integrated with 1D (CuO/InZnO)-1R (NiO) (one diode-one resistor) structure oxide memory node element. RRAM (Resistance Random Access Memory) has provided advantages in fabrication which have made these works possible. Therefore we also suggest methods and techniques for improving the distribution in bi-stable resistance characteristics of the NiO memory node. In order to fabricate stack structures, all device fabrication steps must be possible at low temperatures. The benefits provided by low temperature processes are demonstrated by our devices fabricated over glass substrates. Our paper shows the device characteristics of each individual component as well as the characteristics of combined select transistor with 1D-1R cell. XPS analysis of NiO RRAM resistance layer deposited by ALD confirms similar conclusions to previous reports of the importance of metallic Ni content in sputtered NiO for bistable resistance switching. Also we herein propose a generalized stacked-memory structure to minimize on-chip real estate to maximize integrated density.
    Electron Devices Meeting, 2008. IEDM 2008. IEEE International; 01/2009
  • Article: Phase II study of erlotinib as a salvage treatment for non-small-cell lung cancer patients after failure of gefitinib treatment.
    [show abstract] [hide abstract]
    ABSTRACT: Both gefitinib and erlotinib are reversible epidermal growth factor receptor tyrosine kinase inhibitors, but they have somewhat different pharmacological properties. We conducted a phase II study of erlotinib after failure of gefitinib treatment in patients with non-small-cell lung cancer (NSCLC). Patients with advanced/metastatic NSCLC who had shown disease progression on gefitinib treatment were treated with erlotinib 150 mg/day until disease progression or intolerable toxicity. Between September 2006 and January 2008, a total of 23 patients were enrolled and all were assessable for response and toxicity. All patients were never smokers and all but one had adenocarcinoma. Of these 23 patients, one had a partial response and one stable disease, resulting in an objective response rate of 4.3% and a disease control rate of 8.7%. These two patients benefited from erlotinib for 6.2 months and 7.8 months, respectively; both had also benefited from prior gefitinib therapy. The most common toxic effects were skin rash and diarrhea. Erlotinib should not be given routinely after failure of gefitinib treatment, but can be an option for more highly selected subsets, especially those who had benefited from prior gefitinib treatment. Identification of molecular markers in tumors is important to understand and overcome acquired resistance to gefitinib.
    Annals of Oncology 12/2008; 19(12):2039-42. · 6.43 Impact Factor
  • Conference Proceeding: Low Power Continuous-time Equalizer Adopting a Clock Loss Tracking Technique for Digital Display Interface (DDI)
    K.-Y. Kim, G.-S. Kim, S.-W. Kim
    [show abstract] [hide abstract]
    ABSTRACT: This paper proposes a clock loss tracking technique for detecting the loss over the channel. The continuous-time equalizer adopting this technique improves the stability of system and the accuracy of compensation. Experimental results confirm that proposed equalizer is suitable for digital display interface.
    Consumer Electronics, 2008. ICCE 2008. Digest of Technical Papers. International Conference on; 02/2008
  • Conference Proceeding: Low-power Digital Filter Using Optimized CSD and Pipelined AU for 24-bit Audio DAC
    [show abstract] [hide abstract]
    ABSTRACT: A new optimization algorithm of the digital filter over the CSD coefficient is proposed. This method is based on the selective weighting method assigning more number of operations to some coefficients which are more sensitive to the frequency response remaining total number of operations. Also, the optimized coefficient is utilized as Control-RAM and combined with the 4<sup>th</sup> pipelined AU for the low-power implementation. The designed filter for 24-bit SigmaDelta audio DAC is fabricated with 0.18 um Samsung CMOS technology.
    Consumer Electronics, 2008. ICCE 2008. Digest of Technical Papers. International Conference on; 02/2008
  • Article: A phase II trial of S-1 and cisplatin in patients with metastatic or relapsed biliary tract cancer.
    [show abstract] [hide abstract]
    ABSTRACT: Optimal chemotherapy for advanced biliary tract cancer (BTC) is yet to be defined. We carried out this study to evaluate the efficacy and toxicity of combination chemotherapy with S-1 and cisplatin in metastatic or relapsed BTC. Patients with pathologically proven BTC were eligible. The chemotherapy regimen consisted of S-1 (40 mg/m(2) p.o. b.i.d. from D1-14) and cisplatin (60 mg/m(2) on D1), repeated every 3 weeks. Fifty-one BTC patients (metastatic:relapsed = 37:14, Gall-bladder:intrahepatic bile ducts:extrahepatic bile ducts = 16:25:10) were enrolled from January 2005 to December 2006. Median age was 57 years (range, 31-71) and most patients had a good performance status. The overall response rate was 30% [95% confidence interval (CI), 17.3-42.7] and complete response was observed in two patients (4%), partial response in 13 (26%), stable disease in 21 (42%), and progressive disease in 9 (18%). With a median follow-up of 12.4 months, the median time to progression was 4.8 months (95% CI, 3.3-6.3) and median overall survival was 8.7 months (95% CI, 6.0-11.4). Major toxic effects were grade 3/4 neutropenia (8.9% of all cycles) and febrile neutropenia was observed in six cycles (2.7% of all cycles). Combination chemotherapy with S-1 and cisplatin was a moderately effective outpatient-based regimen in BTC patients. Toxic effects were moderate but manageable.
    Annals of Oncology 02/2008; 19(1):99-103. · 6.43 Impact Factor
  • Article: Belotecan, new camptothecin analogue, is active in patients with small-cell lung cancer: results of a multicenter early phase II study.
    [show abstract] [hide abstract]
    ABSTRACT: Belotecan (Camtobell, Chong Keun Dang Corp, Seoul, Korea; CKD602) is a new camptothecin analogue. This study aimed to investigate the safety and efficacy of single-agent belotecan for small-cell lung cancer (SCLC). Twenty-seven patients with chemotherapy-naive or chemosensitive SCLC were treated with belotecan 0.5 mg/m(2)/day on days 1-5 of a 3-week cycle. All 27 patients were assessable for toxicity, and 21 patients assessable for response. Nine patients (42.9%) showed objective tumor responses including one complete response; seven (63.6%) in 11 chemotherapy-naive patients; and two (20.0%) in 10 chemosensitive patients. With a median follow-up of 5 years, median progression-free and survival time for chemotherapy-naive patients were 4.8 months and 11.9 months, respectively, while the corresponding values for chemosensitive patients were 3.3 months and 10.5 months, respectively. The most common toxicity was neutropenia. Belotecan was active in SCLC patients as a single agent, warranting further investigations of belotecan in combination with platinum or other active agents.
    Annals of Oncology 02/2008; 19(1):123-7. · 6.43 Impact Factor
  • Article: Multicenter phase II trial of Genexol-PM, a novel Cremophor-free, polymeric micelle formulation of paclitaxel, with cisplatin in patients with advanced non-small-cell lung cancer.
    [show abstract] [hide abstract]
    ABSTRACT: Genexol-PM is a novel Cremophor EL (CrEL)-free polymeric micelle formulation of paclitaxel (Taxol). This multicenter phase II study was designed to evaluate the efficacy and safety of the combination of Genexol-PM and cisplatin for the treatment of advanced non-small-cell lung cancer (NSCLC). Patients with advanced NSCLC received Genexol-PM 230 mg/m(2) and cisplatin 60 mg/m(2) on day 1 of a 3-week cycle as first-line therapy. Intrapatient dose escalation of Genexol-PM to 300 mg/m(2) was carried out from the second cycle if the prespecified toxic effects were not observed after the first cycle. Sixty-nine patients were enrolled in this study. Overall response rate was 37.7%. The median time to progression was 5.8 months and the median survival period was 21.7 months. The major non-hematologic toxic effects included grade 3 peripheral sensory neuropathy (13.0%) and grade 3/4 arthralgia (7.3%). Four patients (5.8%) experienced grade 3/4 hypersensitivity reactions. The major hematological toxic effects were grade 3/4 neutropenia (29.0% and 17.4%, respectively). Genexol-PM plus cisplatin combination chemotherapy showed significant antitumor activity. The use of CrEL-free, polymeric micelle formulation of paclitaxel allowed administration of higher doses of paclitaxel compared with the CrEL-based formulation without significant increased toxicity.
    Annals of Oncology 01/2008; 18(12):2009-14. · 6.43 Impact Factor

Institutions

  • 2006–2012
    • Catholic University of Korea
      • Department of Internal Medicine
      Seoul, Seoul, South Korea
  • 2010
    • Kangbuk Samsung Hospital
      Seoul, Seoul, South Korea
  • 1996–2008
    • Korea University
      • • Department of Electrical Engineering
      • • Department of Materials Science and Engineering
      Seoul, Seoul, South Korea
    • University of Seoul
      Seoul, Seoul, South Korea
  • 2007
    • Kumoh National Institute of Technology
      Seoul, Seoul, South Korea
  • 2000–2007
    • Seoul National University Hospital
      Seoul, Seoul, South Korea
  • 2004
    • Chonbuk National University
      Seoul, Seoul, South Korea
  • 1998–2001
    • Seoul National University
      • • Department of Surgery
      • • Division of Chemistry and Molecular Engineering
      • • Department of Chemistry
      Seoul, Seoul, South Korea
    • Ulsan University Hospital
      Ulsan, Ulsan, South Korea
  • 1993–1999
    • Asan Medical Center
      Seoul, Seoul, South Korea
  • 1994–1997
    • University of Ulsan
      • Department of Medicine
      Ulsan, Ulsan, South Korea
  • 1991–1994
    • Kyung Hee University
      • Department of Medicine
      Seoul, Seoul, South Korea
  • 1989
    • Hiroshima University
      Hiroshima-shi, Hiroshima-ken, Japan