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Sangoquiza-Caiza CA, Pincay-Verdezoto AK, Park CH, Zambrano-Mendoza JL. Diversity of nitrogen-fixing and phosphorus-solubilizing bacteria associated with the rhizosphere of Andean maize in Ecuador. BRAZ J BIOL 2023; 83:e273632. [PMID: 37937624 DOI: 10.1590/1519-6984.273632] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Accepted: 09/05/2023] [Indexed: 11/09/2023] Open
Abstract
A great diversity of microorganisms in the soil plays an important role in the sustainability of agricultural production systems. Among these microorganisms are bacteria that have the ability to fix atmospheric nitrogen or mineralize phosphorus, thus making it easily assimilable for plants. Maize is the main crop in the highlands of Ecuador (above 2000 meters) and it is predominantly traditional, using native seeds and very little or no agrochemicals. The National Institute of Agricultural Research (INIAP) has a collection of bacteria collected from the rhizosphere of maize in the highlands of Ecuador that has not been taxonomically identified. This research aimed to carry out a biochemical and genetic characterization to establish the identity of the collected nitrogen-fixing and phosphorus-solubilizing bacteria and to understand better the diversity of microorganisms present in the root biome of Andean maize. The hypothesis consisted of determining if there is a difference in the bacteria associated with the rhizosphere of maize in the Andean region of Ecuador compared with other regions. The bacteria underwent classical biochemical characterization based on catalase, oxidase, urease, sulfates, indole, sulfate-indole motility (SIM), and lactose, among others, and genetic identification by 16S rDNA ribosomal gene sequencing, PCR, and SANGER sequencing. A great diversity of microorganisms associated with the rhizosphere of the crop was found, including the genera Agrobacterium, Bacillus, Stenotrophomonas, Acinetobacter, Brevundimonas, Pseudomonas, and Pseudoxanthomonas. INIAP conserves these bacteria in a bank of microorganisms associated with crops of economic importance. They are useful for the development of biofertilizers that could contribute to a more sustainable agriculture in the region.
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Affiliation(s)
- C A Sangoquiza-Caiza
- Instituto Nacional de Investigaciones Agropecuarias (INIAP), Estación Experimental Santa Catalina (EESC), Programa de Maíz (PM), Cutuglahua, Pichincha, Ecuador
| | - A K Pincay-Verdezoto
- Instituto Nacional de Investigaciones Agropecuarias (INIAP), Estación Experimental Santa Catalina (EESC), Programa de Maíz (PM), Cutuglahua, Pichincha, Ecuador
- Korea Partnership for Innovation of Agriculture (KOPIA),Estación Experimental Santa Catalina (EESC), Cutuglahua, Pichincha, Ecuador
| | - C H Park
- Korea Partnership for Innovation of Agriculture (KOPIA),Estación Experimental Santa Catalina (EESC), Cutuglahua, Pichincha, Ecuador
| | - J L Zambrano-Mendoza
- Instituto Nacional de Investigaciones Agropecuarias (INIAP), Estación Experimental Santa Catalina (EESC), Programa de Maíz (PM), Cutuglahua, Pichincha, Ecuador
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Cho EJ, Kang MR, Kim JH, Lee JI, Son ES, Park CH, Aung WW, Lee JS. Evaluation of the MolecuTech ® REBA MTB-XMDR kit for detection of pre-extensively drug-resistant TB. Int J Tuberc Lung Dis 2022; 26:869-874. [PMID: 35996285 DOI: 10.5588/ijtld.21.0606] [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: 11/10/2022] Open
Abstract
BACKGROUND: Rapid diagnosis of drug-resistant TB is critical for early initiation of effective therapy. YD Diagnostics in South Korea recently developed the MolecuTech® REBA MTB-XMDR test to rapidly detect multidrug-resistant TB (MDR-TB), pre-extensively drug-resistant TB (pre-XDR-TB) and resistance to second-line injectable drugs (SLIDs) simultaneously using a fully automated test platform. This study aimed to evaluate the MolecuTech® test for the detection of MDR- and pre-XDR-TB, as well as SLID resistance.METHODS: A total of 151 clinical Mycobacterium tuberculosis isolates from South Korea were tested using the MolecuTech test, and the results were analysed by comparing these with phenotypic drug susceptibility testing (pDST) and sequencing.RESULTS: Compared to pDST, the MolecuTech test showed a sensitivity and specificity of respectively 97.7% and 100.0% for rifampicin (RIF), 82.4% and 100.0% for isoniazid (INH), 97.5% and 97.2% for fluoroquinolones (FQs), and 94.0% and 98.8% for SLIDs. Concordances with the sequencing results of each resistance determinant were 99.3% for RIF, 96.7% for INH, 98.7% for FQs and 99.3% for SLIDs.CONCLUSION: The MolecuTech test is an efficient and reliable rapid molecular diagnostic tool for the simultaneous screening of MDR- and pre-XDR-TB.
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Affiliation(s)
- E J Cho
- International Tuberculosis Research Center, Gyeongsangnam-do, College of Health Sciences, Catholic University of Pusan, Busan, Republic of Korea
| | - M R Kang
- YD Diagnostics, Gyeonggi-do, College of Health Sciences, Catholic University of Pusan, Busan, Republic of Korea
| | - J H Kim
- YD Diagnostics, Gyeonggi-do, College of Health Sciences, Catholic University of Pusan, Busan, Republic of Korea, Department of Clinical Laboratory Science, College of Health Sciences, Catholic University of Pusan, Busan, Republic of Korea
| | - J I Lee
- International Tuberculosis Research Center, Gyeongsangnam-do, College of Health Sciences, Catholic University of Pusan, Busan, Republic of Korea
| | - E S Son
- International Tuberculosis Research Center, Gyeongsangnam-do, College of Health Sciences, Catholic University of Pusan, Busan, Republic of Korea
| | - C H Park
- YD Diagnostics, Gyeonggi-do, College of Health Sciences, Catholic University of Pusan, Busan, Republic of Korea, College of Pharmacy, Dongguk University, Seoul, Republic of Korea
| | - W W Aung
- Advanced Molecular Research Centre, Department of Medical Research, Yangon, Myanmar
| | - J S Lee
- International Tuberculosis Research Center, Gyeongsangnam-do, College of Health Sciences, Catholic University of Pusan, Busan, Republic of Korea
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Lee JM, Park CH, Yoo JI, Kim JT, Cha Y. Atypical periprosthetic femoral fracture with stem breakage: a case report. Osteoporos Int 2022; 33:2043-2047. [PMID: 35688896 DOI: 10.1007/s00198-022-06463-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Accepted: 06/01/2022] [Indexed: 11/27/2022]
Abstract
Although the American Society for Bone and Mineral Research definition of atypical femoral fracture excludes periprosthetic fractures, fractures around the prosthesis with clinical features of atypical femoral fractures have been reported in the literature. All fractures reported thus far have been distal to the prosthetic segment; however, we encountered a case of a stress fracture in the middle of the femoral component segment. An 86-year-old woman with a history of bisphosphonate osteoporosis treatment and revisional total hip arthroplasty visited our outpatient clinic complaining of pain in the left thigh and groin. We diagnosed an incomplete atypical femoral fracture around the hip prosthesis; medical treatment was implemented. Two months later, the patient visited the emergency department with a complete subtrochanteric fracture with stem breakage. Without revision of the broken stem, two plates were applied after reduction. In this case, we recognized the possibility of a stress fracture but overlooked the possibility of stem breakage in an atypical femoral fracture. Even if it is not evident on the radiograph before complete fracture, clinicians should be alert to the signs of stress fracture in the middle of the femoral component segment, as they may be clues to atypical periprosthetic femoral fracture with stem failure. Isolated medical treatment plans are not recommended for incomplete subtrochanteric atypical periprosthetic femoral fracture. Instead, concomitant prophylactic plate fixation is recommended.
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Affiliation(s)
- J M Lee
- Department of Orthopedic Surgery, Ajou University School of Medicine, Ajou Medical Center, 164, World cup-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do, 16499, South Korea
| | - C H Park
- Department of Orthopedic Surgery, Yeungnam University Medical Center, Daegu, South Korea
| | - J-I Yoo
- Department of Orthopedics, Gyeongsang National University School of Medicine and Gyeongsang National University Hospital, Jinju, South Korea
| | - J-T Kim
- Department of Orthopedic Surgery, Ajou University School of Medicine, Ajou Medical Center, 164, World cup-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do, 16499, South Korea.
| | - Y Cha
- Department of Orthopedic Surgery, Daejeon Eulji Medical Center, Eulji University School of Medicine, 95 Dunsan-Seoro, Seo-gu, Daejeon, 302-799, South Korea.
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Maurya AK, Nagamani M, Kang SW, Yeom JT, Hong JK, Sung H, Park CH, Uma Maheshwera Reddy P, Reddy NS. Development of artificial neural networks software for arsenic adsorption from an aqueous environment. Environ Res 2022; 203:111846. [PMID: 34364860 DOI: 10.1016/j.envres.2021.111846] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 07/26/2021] [Accepted: 07/29/2021] [Indexed: 06/13/2023]
Abstract
Arsenic contamination is a global problem, as it affects the health of millions of people. For this study, data-driven artificial neural network (ANN) software was developed to predict and validate the removal of As(V) from an aqueous solution using graphene oxide (GO) under various experimental conditions. A reliable model for wastewater treatment is essential in order to predict its overall performance and to provide an idea of how to control its operation. This model considered the adsorption process parameters (initial concentration, adsorbent dosage, pH, and residence time) as the input variables and arsenic removal as the only output. The ANN model predicted the adsorption efficiency with high accuracy for both training and testing datasets, when compared with the available response surface methodology (RSM) model. Based on the best model synaptic weights, user-friendly ANN software was created to predict and analyze arsenic removal as a function of adsorption process parameters. We developed various graphical user interfaces (GUI) for easy use of the developed model. Thus, a researcher can efficiently operate the software without an understanding of programming or artificial neural networks. Sensitivity analysis and quantitative estimation were carried out to study the function of adsorption process parameter variables on As(V) removal efficiency, using the GUI of the model. The model prediction shows that the adsorbent dosages, initial concentration, and pH are the most influential parameters. The efficiency was increased as the adsorbent dosages increased, decreasing with initial concentration and pH. The result show that the pH 2.0-5.0 is optimal for adsorbent efficiency (%).
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Affiliation(s)
- A K Maurya
- Advanced Metals Division, Titanium Department, Korea Institute of Materials Science, Changwon, 51508, South Korea; School of Materials Science and Engineering, Engineering Research Institute, Gyeongsang National University, Jinju, 52828, Republic of Korea
| | - M Nagamani
- School of Computer and Information Sciences, University of Hyderabad, Gachibowli, Hyderabad, 500046, India
| | - Seung Won Kang
- Advanced Metals Division, Titanium Department, Korea Institute of Materials Science, Changwon, 51508, South Korea
| | - Jong-Taek Yeom
- Advanced Metals Division, Titanium Department, Korea Institute of Materials Science, Changwon, 51508, South Korea
| | - Jae-Keun Hong
- Advanced Metals Division, Titanium Department, Korea Institute of Materials Science, Changwon, 51508, South Korea
| | - Hyokyung Sung
- School of Materials Science and Engineering, Engineering Research Institute, Gyeongsang National University, Jinju, 52828, Republic of Korea
| | - C H Park
- Advanced Metals Division, Titanium Department, Korea Institute of Materials Science, Changwon, 51508, South Korea.
| | | | - N S Reddy
- School of Materials Science and Engineering, Engineering Research Institute, Gyeongsang National University, Jinju, 52828, Republic of Korea.
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Kim JT, Cha YH, Jeong S, Yoo JI, Park CH. Subtrochanteric atypical femoral fracture induced solely by glucocorticoid without bisphosphonate treatment: a case report. Osteoporos Int 2021; 32:2115-2118. [PMID: 33893546 DOI: 10.1007/s00198-021-05971-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Accepted: 04/19/2021] [Indexed: 10/21/2022]
Abstract
An AFF is a form of stress fracture induced by excessive physiologic repetitive stress over the bone remodeling capacity. Although glucocorticoid administration is a known risk factor for AFF, no case of AFF with glucocorticoid administration as the only risk factor has been previously reported. In this report, we aimed to highlight the risk of AFF associated with long-term administration of glucocorticoids, and the importance of surveillance and correction of risk factors in patients undergoing long-term glucocorticoid therapy. A 58-year-old male patient was diagnosed with subtrochanteric AFF. He had no medical history of any condition that might disrupt bone metabolism and no known risk factors for AFF, except for long-term administration of glucocorticoid. After fixation of the fracture, the glucocorticoid was replaced with an alternative medication. Although AFF is notorious for delayed union or nonunion, complete union of the fracture was obtained at 14 months postoperatively. This case brought to our attention the possibility that glucocorticoids alone may be responsible for inducing AFF and highlighted the importance of regular assessments in case of necessity of glucocorticoid administration. Additionally, correction of risk factors might expedite the union of AFF.
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Affiliation(s)
- J-T Kim
- Department of Orthopedic Surgery, Ajou University School of Medicine, Ajou Medical Center, Suwon, Korea
| | - Y-H Cha
- Department of Orthopaedic Surgery, Eulji University School of Medicine, Daejeon Eulji Medical Center, 95 Dunsan Seoro, Seo-gu, Daejeon, 35233, South Korea.
| | - S Jeong
- Department of Orthopedic Surgery, Ajou University School of Medicine, Ajou Medical Center, Suwon, Korea
| | - J-I Yoo
- Department of Orthopaedic Surgery, Gyeongsang National University Hospital, Jinju, South Korea
| | - C H Park
- Department of Orthopaedic Surgery, Yeungnam University Medical Center, Daegu, South Korea
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Maurya AK, Reddy BS, Theerthagiri J, Narayana PL, Park CH, Hong JK, Yeom JT, Cho KK, Reddy NS. Modeling and optimization of process parameters of biofilm reactor for wastewater treatment. Sci Total Environ 2021; 787:147624. [PMID: 34000535 DOI: 10.1016/j.scitotenv.2021.147624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 04/19/2021] [Accepted: 05/03/2021] [Indexed: 06/12/2023]
Abstract
The efficiency of heavy metal in biofilm reactors depends on absorption process parameters, and those relationships are complicated. This study explores artificial neural networks (ANNs) feasibility to correlate the biofilm reactor process parameters with absorption efficiency. The heavy metal removal and turbidity were modeled as a function of five process parameters, namely pH, temperature(°C), feed flux(ml/min), substrate flow(ml/min), and hydraulic retention time(h). We developed a standalone ANN software for predicting and analyzing the absorption process in handling industrial wastewater. The model was tested extensively to confirm that the predictions are reasonable in the context of the absorption kinetics principles. The model predictions showed that the temperature and pH values are the most influential parameters affecting absorption efficiency and turbidity.
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Affiliation(s)
- A K Maurya
- Advanced Metals Division, Titanium Department, Korea Institute of Materials Science, Changwon 51508, South Korea; Virtual Materials Lab, School of Materials Science and Engineering, Engineering Research Institute, Gyeongsang National University, Jinju 52828, South Korea
| | - B S Reddy
- Department of Materials Engineering and Convergence Technology & RIGET, Gyeongsang National University, Jinju 52828, South Korea
| | - J Theerthagiri
- Department of Chemistry and Research Institute of Natural Science, Gyeongsang National University, Jinju, South Korea
| | - P L Narayana
- Advanced Metals Division, Titanium Department, Korea Institute of Materials Science, Changwon 51508, South Korea; Virtual Materials Lab, School of Materials Science and Engineering, Engineering Research Institute, Gyeongsang National University, Jinju 52828, South Korea
| | - C H Park
- Advanced Metals Division, Titanium Department, Korea Institute of Materials Science, Changwon 51508, South Korea
| | - J K Hong
- Advanced Metals Division, Titanium Department, Korea Institute of Materials Science, Changwon 51508, South Korea
| | - J-T Yeom
- Advanced Metals Division, Titanium Department, Korea Institute of Materials Science, Changwon 51508, South Korea.
| | - K K Cho
- Department of Materials Engineering and Convergence Technology & RIGET, Gyeongsang National University, Jinju 52828, South Korea
| | - N S Reddy
- Virtual Materials Lab, School of Materials Science and Engineering, Engineering Research Institute, Gyeongsang National University, Jinju 52828, South Korea.
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Chung H, Park CH, Kim YJ, Kim JY, Min PK, Yoon YW, Lee KA, Lee BK, Hong BK, Kim TH, Rim SJ, Kwon HM, Choi EY. Myocardial extracellular space expansion is related to burden of premature ventricular contractions in patients with hypertrophic cardiomyopathy without non-sustained ventricular tachycardia. Eur Heart J Cardiovasc Imaging 2021. [DOI: 10.1093/ehjci/jeaa356.321] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Funding Acknowledgements
Type of funding sources: None.
Background
Current guidelines suggest the presence of non-sustained ventricular tachycardia (NSVT) as a risk factor of sudden cardiac death in patients with hypertrophic cardiomyopathy (HCM). However, high burden of premature ventricular contraction (PVC) may reflect myocardial fibrosis although the absence of NSVT.
Purpose
We investigated the association between PVC burden and myocardial extracellular space expansion in HCM patients without NSVT.
Methods
Of the 212 patients prospectively enrolled to the HCM registry of genetics, 84 patients were evaluated with both cardiac magnetic resonance and 24hr holter. Among them, 71 patients (58 males, mean age: 71 ± 13 years) have not been diagnosed with NSVT.
Results
Patients with NSVT (n = 13) showed more impaired LA functional indices and higher myocardial fibrosis burden compared with patients without NSVT (n = 71). Among patients who have not been diagnosed with NSVT, patients with late gadolinium enhancement (LGE, n = 46) had a higher total beats (109 ± 332 vs. 7 ± 13 beats per a day, p = 0.003) and burden (0.114 ± 0.225 vs. 0.008 ± 0.014 %, p = 0.003) of PVC during 24-hour compared with patients without LGE (n = 25). %LGE was correlated with total beats of PVC (r = 0.358, p = 0.002) and PVC burden (r = 0.377, p = 0.001). ECV also correlated with total beats of PVC (r = 0.387, p = 0.001) and PVC burden (r = 0.401, p = 0.001). The optimal cutoff value for PVC number was 45 (37.0% of sensitivity and 100% of specificity) with 0.733 of the area under the ROC curve (p < 0.001). Pathogenic or likely pathogenic sarcomere mutation was higher in NSVT group than no NSVT group (p < 0.05), and had a higher tendency in higher PVC burden group (0.05 < p < 0.1) than lower PVC burden group.
Conclusions
Total beats and burden of PVC are significantly related to increase in myocardial fibrosis in HCM patients without NSVT.
Abstract Figure. Mechanism of ventricular arrhythmia
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Affiliation(s)
- H Chung
- Kyung Hee Medical Center, Seoul, Korea (Republic of)
| | - CH Park
- Gangnam Severance Hospital, Seoul, Korea (Republic of)
| | - YJ Kim
- Gangnam Severance Hospital, Seoul, Korea (Republic of)
| | - JY Kim
- Gangnam Severance Hospital, Seoul, Korea (Republic of)
| | - PK Min
- Gangnam Severance Hospital, Seoul, Korea (Republic of)
| | - YW Yoon
- Gangnam Severance Hospital, Seoul, Korea (Republic of)
| | - KA Lee
- Gangnam Severance Hospital, Seoul, Korea (Republic of)
| | - BK Lee
- Gangnam Severance Hospital, Seoul, Korea (Republic of)
| | - BK Hong
- Gangnam Severance Hospital, Seoul, Korea (Republic of)
| | - TH Kim
- Gangnam Severance Hospital, Seoul, Korea (Republic of)
| | - SJ Rim
- Gangnam Severance Hospital, Seoul, Korea (Republic of)
| | - HM Kwon
- Gangnam Severance Hospital, Seoul, Korea (Republic of)
| | - EY Choi
- Gangnam Severance Hospital, Seoul, Korea (Republic of)
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Kim EY, Do SI, Yun JS, Park YL, Park CH, Moon JH, Youn I, Choi YJ, Ham SY, Kook SH. Preoperative evaluation of mammographic microcalcifications after neoadjuvant chemotherapy for breast cancer. Clin Radiol 2020; 75:641.e19-641.e27. [PMID: 32291081 DOI: 10.1016/j.crad.2020.03.024] [Citation(s) in RCA: 3] [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] [Received: 10/11/2019] [Accepted: 03/11/2020] [Indexed: 12/20/2022]
Abstract
AIM To assess the predictive value of preoperative residual mammographic microcalcifications for residual tumours after neoadjuvant chemotherapy (NAC) for breast cancer. MATERIALS AND METHODS This single-centre retrospective study included breast cancer patients who underwent NAC and demonstrated suspicious microcalcifications within or near the tumour bed on mammography from June 2015 to August 2018. The residual microcalcifications and remnant lesion on magnetic resonance imaging (MRI) were correlated with histopathological findings of residual tumours and immunohistochemical markers. RESULTS A total of 96 patients were included. Ten patients achieved pathological complete response (pCR) and previous suspicious microcalcifications were associated with benign pathology in 10.4% (10/96) of the patients. In the remaining 86 patients who did not achieve pCR, 61.5% (59/96) of the residual microcalcifications were associated with invasive or in situ carcinoma and 28.1% (27/96) with benign pathology. Hormone receptor-positive (HR+) patients had the highest proportion of residual malignant microcalcifications compared to HR- patients (48.9% versus 13.5%, respectively; p=0.019). MRI correlated better than residual microcalcifications on mammography in predicting residual tumour extent in all subtypes (ICC=0.709 versus 0.365). MRI also showed higher correlation with residual tumour size for the HR-/HER2+ and HR-/HER2- subtype (ICC=0.925 and 0.876, respectively). CONCLUSION The extent of microcalcifications on mammography after NAC did not correlate with the extent of residual cancer in 38.5% of women. Regardless of the extent of microcalcifications, residual tumour extent on MRI after NAC and molecular subtype could be an accurate tool in evaluating residual cancer after NAC.
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Affiliation(s)
- E Y Kim
- Department of Surgery, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - S-I Do
- Department of Pathology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea.
| | - J-S Yun
- Department of Surgery, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Y L Park
- Department of Surgery, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - C H Park
- Department of Surgery, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - J H Moon
- Department of Radiology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - I Youn
- Department of Radiology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Y J Choi
- Department of Radiology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - S-Y Ham
- Department of Radiology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - S H Kook
- Department of Radiology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea.
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Park CH, Lee B, Oh E, Kim YS, Choi YM. Combined effects of sous-vide cooking conditions on meat and sensory quality characteristics of chicken breast meat. Poult Sci 2020; 99:3286-3291. [PMID: 32475464 PMCID: PMC7597729 DOI: 10.1016/j.psj.2020.03.004] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Accepted: 02/19/2020] [Indexed: 11/18/2022] Open
Abstract
This study investigated the combined effects of cooking temperature and time on the meat and eating quality characteristics of the sous-vide chicken breast. For the control group, chicken breast samples were cooked in a convection oven until the internal temperature reached 71°C. Each sample for sous-vide cooking was vacuum packaged and then cooked under continuous thermocontrolled conditions in a water bath at 6 combinations of cooking temperature (60 and 70°C) and time (1, 2, and 3 h). Sous-vide cooked chicken meat at 60°C for 1 h (SV60-1h) showed lower cooking loss (6.58 vs. 26.5%, P < 0.05), Warner-Bratzler shear force (21.7 vs. 29.1 N, P < 0.05), and hardness (9.40 vs. 17.3 N, P < 0.05) than meat cooked by conventional oven. Similar to the objective tenderness parameters, cooked chicken meat from the SV60 treatments for all cooking times showed higher scores in all the tenderness attributes than the control group (P < 0.05). However, a higher flavor intensity was observed in the SV70-3h and control groups than in the SV60 treatments (P < 0.05). Owing to a lesser developed flavor in chicken meat from the SV60-1h treatment, the SV60-2h and 3h treatments were assigned a higher acceptability rating for overall impression (P < 0.05). Therefore, cooking temperature and time of sous-vide significantly influenced the physicochemical and palatability characteristics of chicken breast. In this study, the optimum conditions for the sous-vide chicken breast are to continuously cook at 60°C for 2 to 3 h to improve sensory quality characteristics without reducing the water-holding capacity.
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Affiliation(s)
- C H Park
- Department of Integrated Biomedical and Life Sciences, Korea University, Seoul, South Korea; Department of Hotel and Food Service Culinary Art, Daejeon Health Institute of Technology, Daejeon, South Korea
| | - B Lee
- Department of Animal Sciences, Kyungpook National University, Sangju, South Korea
| | - E Oh
- Department of Animal Sciences, Kyungpook National University, Sangju, South Korea
| | - Y S Kim
- Department of Integrated Biomedical and Life Sciences, Korea University, Seoul, South Korea.
| | - Y M Choi
- Department of Animal Sciences, Kyungpook National University, Sangju, South Korea.
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Kim KD, Jung HY, Ryu HG, Kim B, Jeon J, Yoo HY, Park CH, Choi BH, Hyun CK, Kim KT, Fang S, Yang SH, Kim JB. Betulinic acid inhibits high-fat diet-induced obesity and improves energy balance by activating AMPK. Nutr Metab Cardiovasc Dis 2019; 29:409-420. [PMID: 30799179 DOI: 10.1016/j.numecd.2018.12.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Revised: 12/05/2018] [Accepted: 12/05/2018] [Indexed: 12/18/2022]
Abstract
BACKGROUND AND AIM Metabolic syndromes are prevalent worldwide and result in various complications including obesity, cardiovascular disease and type II diabetes. Betulinic acid (BA) is a naturally occurring triterpenoid that has anti-inflammatory properties. We hypothesized that treatment with BA may result in decreased body weight gain, adiposity and hepatic steatosis in a diet-induced mouse model of obesity. METHODS AND RESULTS Mice fed a high-fat diet and treated with BA showed less weight gain and tissue adiposity without any change in calorie intake. Gene expression profiling of mouse tissues and cell lines revealed that BA treatment increased expression of lipid oxidative genes and decreased that of lipogenesis-related genes. This modulation was mediated by increased AMP-activated protein kinase (AMPK) phosphorylation, which facilitates energy expenditure, lipid oxidation and thermogenic capacity and exerts protective effects against obesity and nonalcoholic fatty liver disease. Overall, BA markedly inhibited the development of obesity and nonalcoholic fatty liver disease in mice fed a high-fat diet, and AMPK activation in various tissues and enhanced thermogenesis are two possible mechanisms underlying the antiobesity and antisteatogenic effects of BA. CONCLUSIONS The current findings suggest that treatment with BA is a potential dietary strategy for preventing obesity and nonalcoholic fatty liver disease.
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Affiliation(s)
- K-D Kim
- School of Life Science, Handong Global University, Pohang, Gyungbuk, South Korea
| | - H-Y Jung
- Division of Integrative Biosciences and Biotechnology, POSTECH, Pohang, Gyungbuk, South Korea; R&D Center, NovMetaPharma Co., Ltd., Pohang, Gyungbuk, South Korea
| | - H G Ryu
- Department of Life Sciences, POSTECH, Pohang, Gyungbuk, South Korea
| | - B Kim
- School of Life Science, Handong Global University, Pohang, Gyungbuk, South Korea; R&D Center, NovMetaPharma Co., Ltd., Pohang, Gyungbuk, South Korea
| | - J Jeon
- Division of Integrative Biosciences and Biotechnology, POSTECH, Pohang, Gyungbuk, South Korea; R&D Center, NovMetaPharma Co., Ltd., Pohang, Gyungbuk, South Korea
| | - H Y Yoo
- Division of Integrative Biosciences and Biotechnology, POSTECH, Pohang, Gyungbuk, South Korea
| | - C H Park
- Mistle Biotech Co., Ltd., Pohang, Gyungbuk, South Korea
| | - B-H Choi
- Advanced Bio Convergence Center, Pohang Technopark, Pohang, Gyungbuk, South Korea
| | - C-K Hyun
- School of Life Science, Handong Global University, Pohang, Gyungbuk, South Korea
| | - K-T Kim
- Division of Integrative Biosciences and Biotechnology, POSTECH, Pohang, Gyungbuk, South Korea; Department of Life Sciences, POSTECH, Pohang, Gyungbuk, South Korea
| | - S Fang
- Severance Biomedical Science Institute, BK21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, South Korea
| | - S H Yang
- Kidney Research Institute, Seoul National University College of Medicine, Seoul, South Korea; Seoul National University Biomedical Research Institute, Seoul, South Korea
| | - J-B Kim
- School of Life Science, Handong Global University, Pohang, Gyungbuk, South Korea; Mistle Biotech Co., Ltd., Pohang, Gyungbuk, South Korea.
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11
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Kim EY, Park YL, Park CH, Suh BC. Abstract P4-11-03: Withdrawn. Cancer Res 2019. [DOI: 10.1158/1538-7445.sabcs18-p4-11-03] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
This abstract was withdrawn by the authors.
Citation Format: Kim EY, Park YL, Park CH, Suh BC. Withdrawn [abstract]. In: Proceedings of the 2018 San Antonio Breast Cancer Symposium; 2018 Dec 4-8; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2019;79(4 Suppl):Abstract nr P4-11-03.
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Affiliation(s)
- EY Kim
- Kangbuk Samsung Hospital, Seoul, Republic of Korea
| | - YL Park
- Kangbuk Samsung Hospital, Seoul, Republic of Korea
| | - CH Park
- Kangbuk Samsung Hospital, Seoul, Republic of Korea
| | - BC Suh
- Kangbuk Samsung Hospital, Seoul, Republic of Korea
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12
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Liang H, Bae JK, Park CH, Kim KI, Bae DK, Song SJ. Comparison of mode of failure between primary and revision total knee arthroplasties. Orthop Traumatol Surg Res 2018; 104:171-176. [PMID: 29032308 DOI: 10.1016/j.otsr.2017.10.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/21/2017] [Revised: 09/24/2017] [Accepted: 10/02/2017] [Indexed: 02/02/2023]
Abstract
INTRODUCTION Cognizance of common reasons for failure in primary and revision TKA, together with their time course, facilitates prevention. However, there have been few reports specifically comparing modes of failure for primary vs. revision TKA using a single prosthesis. The goal of the study was to compare the survival rates, modes of failure, and time periods associated with each mode of failure, of primary vs. revision TKA. HYPOTHESIS The survival rates, modes of failure, time period for each mode of failure, and risk factors would differ between primary and revision TKA. MATERIAL AND METHODS Data from a consecutive cohort comprising 1606 knees (1174 patients) of primary TKA patients, and 258 knees (224 patients) of revision TKA patients, in all of whom surgery involved a P.F.C® prosthesis (Depuy, Johnson & Johnson, Warsaw, IN), was retrospectively reviewed. The mean follow-up periods of primary and revision TKAs were 9.2 and 9.8 years, respectively. RESULTS The average 10- and 15-year survival rates for primary TKA were 96.7% (CI 95%,±0.7%) and 85.4% (CI 95%,±2.0%), and for revision TKA 91.4% (CI 95%,±2.5%) and 80.5% (CI 95%,±4.5%). Common modes of failure included polyethylene wear, loosening, and infection. The most common mode of failure was polyethylene wear in primary TKA, and infection in revision TKA. The mean periods (i.e., latencies) of polyethylene wear and loosening did not differ between primary and revision TKAs, but the mean period of infection was significantly longer for revision TKA (1.2 vs. 4.8 years, P=0.003). DISCUSSION Survival rates decreased with time, particularly more than 10 years post-surgery, for both primary and revision TKAs. Continuous efforts are required to prevent and detect the various modes of failure during long-term follow-up. Greater attention is necessary to detect late infection-induced failure following revision TKA. LEVEL OF EVIDENCE Case-control study, Level III.
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Affiliation(s)
- H Liang
- Department of orthopaedic surgery, college of Medicine, Kyung Hee university, 26, Kyunghee-daero, Dongdaemun-gu, Seoul 130-701, Republic of Korea
| | - J K Bae
- Department of orthopaedic surgery, college of Medicine, Kyung Hee university, 26, Kyunghee-daero, Dongdaemun-gu, Seoul 130-701, Republic of Korea
| | - C H Park
- Department of orthopaedic surgery, college of Medicine, Kyung Hee university, 26, Kyunghee-daero, Dongdaemun-gu, Seoul 130-701, Republic of Korea
| | - K I Kim
- Department of orthopaedic surgery, college of Medicine, Kyung Hee university, 26, Kyunghee-daero, Dongdaemun-gu, Seoul 130-701, Republic of Korea
| | - D K Bae
- Department of orthopaedic surgery, college of Medicine, Kyung Hee university, 26, Kyunghee-daero, Dongdaemun-gu, Seoul 130-701, Republic of Korea
| | - S J Song
- Department of orthopaedic surgery, college of Medicine, Kyung Hee university, 26, Kyunghee-daero, Dongdaemun-gu, Seoul 130-701, Republic of Korea.
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13
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Jung WS, Park CH, Hong CK, Suh SH, Ahn SJ. Diffusion-Weighted Imaging of Brain Metastasis from Lung Cancer: Correlation of MRI Parameters with the Histologic Type and Gene Mutation Status. AJNR Am J Neuroradiol 2018; 39:273-279. [PMID: 29301782 DOI: 10.3174/ajnr.a5516] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Accepted: 09/07/2017] [Indexed: 12/30/2022]
Abstract
BACKGROUND AND PURPOSE Development of noninvasive imaging biomarkers indicating the histology and the gene mutation status of brain metastasis from lung cancer is important. We aimed to investigate diffusion-weighted imaging parameters as predictors of the histology and gene mutations of brain metastasis from lung cancer. MATERIALS AND METHODS DWI data for 74 patients with brain metastasis from lung cancer were retrospectively reviewed. The patients were first grouped according to the primary tumor histology (adenocarcinoma, small-cell lung cancer, squamous cell carcinoma), and those with adenocarcinoma were further divided into epidermal growth factor receptor (EFGR) mutation-positive and wild type groups. Sex; age; number, size, and location of brain metastasis; DWI visual scores; the minimum ADC; and the normalized ADC ratio were compared among groups using χ2 and ANOVA. Multiple logistic regression analysis was performed to determine independent predictors of the EGFR mutation. RESULTS The minimum ADC was lower in the small-cell lung cancer group than in the other 2 groups, though the difference was not significant. Furthermore, minimum ADC and the normalized ADC ratio were significantly lower in the EGFR mutation-positive group than in the wild type group (P = .021 and .014, respectively). Multivariate analysis revealed that minimum ADC and the normalized ADC ratio were independently associated with the EGFR mutation status (P = .028 and .021, respectively). CONCLUSIONS Our results suggest that DWI parameters (minimum ADC and normalized ADC ratio) for the solid components of brain metastasis from lung cancer are not correlated with their histology, whereas they can predict the EGFR mutation status in brain metastasis from lung adenocarcinoma.
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Affiliation(s)
- W S Jung
- From the Departments of Radiology (W.S.J., C.H.P., S.H.S., S.J.A.).,Department of Radiology (W.S.J.), Ajou University School of Medicine, Suwon, Korea
| | - C H Park
- From the Departments of Radiology (W.S.J., C.H.P., S.H.S., S.J.A.)
| | - C-K Hong
- Neurosurgery (C.-K.H.), Gangnam Severance Hospital, Yonsei University, College of Medicine, Seoul, Korea
| | - S H Suh
- From the Departments of Radiology (W.S.J., C.H.P., S.H.S., S.J.A.)
| | - S J Ahn
- From the Departments of Radiology (W.S.J., C.H.P., S.H.S., S.J.A.)
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Song SJ, Bae JK, Park CH, Yoo MC, Bae DK, Kim KI. Mid-term outcomes and complications of total knee arthroplasty in haemophilic arthropathy: A review of consecutive 131 knees between 2006 and 2015 in a single institute. Haemophilia 2017; 24:299-306. [PMID: 29193440 DOI: 10.1111/hae.13383] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/06/2017] [Indexed: 12/26/2022]
Abstract
INTRODUCTION Although total knee arthroplasty (TKA) in haemophilic arthropathy can reduce severe joint pain and improve functional disability, it is technically demanding. AIM To evaluate mid-term outcomes and complications of TKA in haemophilic arthropathy. METHODS This study retrospectively reviewed 131 consecutive primary TKAs in a single institute. The mean age was 41.0 years old, and the mean follow-up period was 6.8 years. Clinical and radiographic results were evaluated. Complications were categorized according to the classification system of the Knee Society for TKA complications. RESULTS The average Western Ontario and McMaster Universities Arthritis Index (WOMAC) score improved from 66.0 to 24.2. The average flexion contracture significantly decreased from 17.3° to 4.7°, but the average pre- and postoperative maximum flexion did not differ (80.9° vs 85.6°, respectively). The average mechanical axis was varus 5.2° preoperatively and valgus 0.3° postoperatively. The coronal positions of the femoral and tibial components and the sagittal positions of these components were within ±3° in 83.2%, 89.3%, 63.4% and 73.3% of cases, respectively. Complications occurred in 17 knees (13.0%): hemarthrosis (n = 7), medial collateral ligament injury (n = 1), stiffness (n = 2), deep periprosthetic joint infection (PJI) (n = 3) and periprosthetic fracture (n = 4). CONCLUSIONS The mid-term results of TKA in haemophilic arthropathy were satisfactory in pain relief, improved function and decreased flexion contracture. Bleeding and PJI continue to be major concerns for TKA in haemophilic arthropathy, and risk of periprosthetic fracture must be taken into account for patient education and appropriate prevention.
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Affiliation(s)
- S J Song
- Department of Orthopaedic Surgery, College of Medicine, Kyung Hee University, Seoul, Korea
| | - J K Bae
- Department of Orthopaedic Surgery, College of Medicine, Kyung Hee University, Seoul, Korea
| | - C H Park
- Department of Orthopaedic Surgery, College of Medicine, Kyung Hee University, Seoul, Korea
| | - M C Yoo
- Department of Orthopaedic Surgery, College of Medicine, Kyung Hee University, Seoul, Korea
| | - D K Bae
- Department of Orthopaedic Surgery, College of Medicine, Kyung Hee University, Seoul, Korea
| | - K I Kim
- Department of Orthopaedic Surgery, College of Medicine, Kyung Hee University, Seoul, Korea
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Jung YS, Kim EH, Park CH. Editorial: replacing standard proton pump inhibitors with vonoprazan may breathe new life into triple therapy for Helicobacter pylori-authors' reply. Aliment Pharmacol Ther 2017; 46:551-552. [PMID: 28776746 DOI: 10.1111/apt.14206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Y S Jung
- Department of Internal Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - E H Kim
- Division of Gastroenterology, Department of Internal Medicine, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - C H Park
- Department of Internal Medicine, Hanyang University Guri Hospital, Hanyang University College of Medicine, Guri, Korea
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Jung YS, Kim EH, Park CH. Systematic review with meta-analysis: the efficacy of vonoprazan-based triple therapy on Helicobacter pylori eradication. Aliment Pharmacol Ther 2017; 46:106-114. [PMID: 28497487 DOI: 10.1111/apt.14130] [Citation(s) in RCA: 116] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/09/2017] [Revised: 03/05/2017] [Accepted: 04/13/2017] [Indexed: 02/06/2023]
Abstract
BACKGROUND In order to increase eradication rates, vonoprazan, a novel potassium-competitive acid blocker, has been used in Helicobacter pylori eradication therapy. AIM To summarise the results of the efficacy of vonoprazan-based triple therapy, helping clinicians to better understand the benefit of vonoprazan in the treatment of H. pylori infection. METHODS We conducted a systematic literature search on MEDLINE, EMBASE, and the Cochrane Library using the primary keywords "vonoprazan," "takecab", "TAK-438," "potassium," "competitive," "potassium-competitive," "Helicobacter," and "pylori." Studies were included if they evaluated the eradication rate between the vonoprazan-based and proton pump inhibitor (PPI)-based triple therapies. RESULTS Ten studies and 10 644 patients were evaluated. The crude H. pylori eradication rate determined by intention-to-treat analysis was 87.9% and 72.8% in the vonoprazan-based triple therapy and PPI-based triple therapy respectively. The eradication rate of the vonoprazan-based triple therapy was superior to that of the PPI-based triple therapy (pooled risk ratio [RR] [95% confidence interval (CI)]=1.19 [1.15-1.24]) In addition, there was no significant difference in dropout rate due to adverse event between the regimens (pooled RR of the vonoprazan-based triple therapy [95% CI]=0.69 [0.23-2.03]). The incidence of any adverse events also did not differ between the regimens (pooled RR [95% CI]=1.02 [0.78-1.34]). CONCLUSIONS The vonoprazan-based triple therapy showed superior efficacy in terms of H. pylori eradication as compared to the PPI-based triple therapy. In addition, the vonoprazan-based triple therapy showed comparable tolerability and incidence of adverse events.
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Affiliation(s)
- Y S Jung
- Division of Gastroenterology, Department of Internal Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - E H Kim
- Division of Gastroenterology, Department of Internal Medicine, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - C H Park
- Department of Internal Medicine, Hanyang University Guri Hospital, Hanyang University College of Medicine, Guri, Korea
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17
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Ryu OH, Chao JR, Choi MG, Kim C, Suh JG, Kim YY, Park CH, Kim HJ, Lee JH. Insulin effect on hearing recovery in idiopathic sudden sensorineural hearing loss: Retrospective study of 145 patients. Clin Otolaryngol 2017; 42:1072-1077. [PMID: 28177591 DOI: 10.1111/coa.12848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/30/2017] [Indexed: 11/26/2022]
Affiliation(s)
- O H Ryu
- Department of Endocrinology and Metabolism, College of Medicine, Hallym University, Chuncheon, Korea
| | - J R Chao
- School of Medicine, George Washington University, Washington, DC, USA
| | - M G Choi
- Department of Endocrinology and Metabolism, College of Medicine, Hallym University, Chuncheon, Korea
| | - C Kim
- Department of Neurology, Chuncheon Sacred Heart Hospital, Hallym University, Chuncheon, Korea
| | - J-G Suh
- Department of Medical Genetics, College of Medicine, Hallym University, Chuncheon, Korea
| | - Y Y Kim
- Department of Medical Genetics, College of Medicine, Hallym University, Chuncheon, Korea
| | - C H Park
- Nano-Bio Regenerative Medical Institute, Hallym University, Chuncheon, Korea.,Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Hallym University, Chuncheon, Korea
| | - H-J Kim
- Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Hallym University, Chuncheon, Korea
| | - J H Lee
- Nano-Bio Regenerative Medical Institute, Hallym University, Chuncheon, Korea.,Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Hallym University, Chuncheon, Korea
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Byun HJ, Ha JY, Jung W, Kim BH, Park CH, Kim CI. The impact of obesity on febrile urinary tract infection and renal scarring in children with vesicoureteral reflux. J Pediatr Urol 2017; 13:67.e1-67.e6. [PMID: 28087230 DOI: 10.1016/j.jpurol.2016.08.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Accepted: 08/31/2016] [Indexed: 11/19/2022]
Abstract
INTRODUCTION It has become clear that obesity is associated with a variety of infectious diseases, including urinary tract infection (UTI) and renal scarring. OBJECTIVE The aim of this study was to evaluate the association between obesity and the degree of febrile UTI (fUTI) and renal scarring in children with vesicoureteral reflux (VUR), and to stratify the results into obesity subcategories. STUDY DESIGN A total of 186 patients were diagnosed with VUR between January 2002 and December 2008. This study retrospectively reviewed the medical records of 72 children with primary VUR who had recurrent fUTI (more than twice). Overweight or obese status of the patients aged <2 years was defined using weight-for-length (WFL) measurements. For 2-5 year old children, body mass index (BMI) percentile-for-age was used. They were divided into three groups as follows; standard (<85%), overweight (85-95%), and obese (≥95%). The following clinical variables were compared: age at diagnosis of primary VUR (months), sex, VUR grade, hydronephrosis grade, presence of renal scarring, surgical treatment, and degree of inflammation during fUTI. RESULTS In the overweight and obese groups, VUR was diagnosed at a young age (P = 0.05), the degree of renal scarring was more severe (P = 0.006), and serum white blood cell count, C-reactive protein, and erythrocyte sedimentation rate (ESR) levels were significantly higher (P < 0.001, P < 0.001, and P < 0.001, respectively). Abnormal focal dimercaptosuccinic acid (DMSA) defects were present in 25 of the 72 children (35%). Cortical defects occurred more frequently in children with obesity, and they were associated with a higher grade of reflux and serum ESR levels (P = 0.007, P = 0.042, and P = 0.021, respectively). Among these risk factors, high-grade VUR (OR = 9.93, 95% CI = 1.13-86.71), and being overweight and obese (OR = 5.26, 95% CI = 1.75-15.82) were associated with increased renal scarring. However, ESR was not associated with renal scarring (OR = 1.01, 95% CI = 0.95-1.07). DISCUSSION The relationships between obesity and UTI are controversial. Some studies have shown positive results; however, other studies have shown opposite results. The main limitations of this study were the retrospective data collection via electronic medical records, and the small number of subjects. CONCLUSIONS This study showed that obesity in patients with VUR has an effect on fUTI and renal scar formation. If the patients with VUR have obesity, close follow-up should be performed, and VUR patients should be started on a weight-loss program, which could reduce the number of patients with chronic kidney disease in the future.
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Affiliation(s)
- H J Byun
- Department of Urology, School of Medicine, Keimyung University, Daegu, Republic of Korea
| | - J Y Ha
- Department of Urology, School of Medicine, Keimyung University, Daegu, Republic of Korea.
| | - W Jung
- Department of Urology, School of Medicine, Keimyung University, Daegu, Republic of Korea
| | - B H Kim
- Department of Urology, School of Medicine, Keimyung University, Daegu, Republic of Korea
| | - C H Park
- Department of Urology, School of Medicine, Keimyung University, Daegu, Republic of Korea
| | - C I Kim
- Department of Urology, School of Medicine, Keimyung University, Daegu, Republic of Korea
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Kim TH, You HW, Park JH, Lee JG, Choo MS, Park WH, Lee JZ, Park CH, Na YG, Kwon DD, Lee KS. Persistence of solifenacin therapy in patients with overactive bladder in the clinical setting: a prospective, multicenter, observational study. Int J Clin Pract 2016; 70:351-7. [PMID: 27028673 DOI: 10.1111/ijcp.12783] [Citation(s) in RCA: 12] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
OBJECTIVES The aim of this study was to evaluate the persistence with solifenacin therapy over a 12-month period in patients with overactive bladder (OAB). METHODS This is a 52-week long, multicenter, prospective, observational study. The subjects were individuals ≥ 18 years old with OAB symptoms for ≥ 3 months, characterised by a total OAB Symptom Score (OABSS) of ≥ 3 and OABSS urgency item score of ≥ 2. Patients were prescribed 5 mg or 10 mg of solifenacin once daily for OAB symptoms. Drug persistence, reasons for discontinuation and factors related to the persistence were evaluated. RESULTS A total of 1018 patients (329 men, 689 women) with a mean age of 59 years were included. The 52-week drug persistence rate was 22.1%. The drug persistence rates at 12, 24 and 36 weeks were 72.4%, 45.8% and 31.1% respectively. The three most common reasons for discontinuing therapy included symptom improvement in 30.4%, lack of efficacy in 13.4%, and a switch to another antimuscarinic agent in 10.8%. Older patients (odds ratio = 1.02, 95% CI: 1.01-1.04), and female patients (odds ratio = 1.94, 95% CI: 1.37-2.75) were more likely to continue the medication over the 12-month period than were younger, male patients. The number of nocturia episodes was negatively correlated with drug persistence (odds ratio = 0.83, 95% CI: 0.71-0.97). CONCLUSIONS There was low persistence (22%) to solifenacin therapy for OAB symptoms over a 12-month period. Older patients, female patients and those with fewer episodes of nocturia were more persistent to therapy than were others.
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Affiliation(s)
- T H Kim
- Department of Urology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - H W You
- Department of Urology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - J H Park
- Department of Urology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - J G Lee
- Department of Urology, Korea University College of Medicine, Seoul, Korea
| | - M-S Choo
- Department of Urology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea
| | - W H Park
- Department of Urology, Inha University College of Medicine, Incheon, Korea
| | - J Z Lee
- Department of Urology, Pusan National University Hospital, Pusan, Korea
| | - C H Park
- Department of Urology, Keimyung University School of Medicine, Daegu, Korea
| | - Y G Na
- Department of Urology, Chungnam National University School of Medicine, Daejeon, Korea
| | - D D Kwon
- Department of Urology, Chonnam National University Medical School, Gwangju, Korea
| | - K-S Lee
- Department of Urology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
- Department of Medical Device Management & Research, SAIHST, Sungkyunkwan University, Seoul, Korea
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Cho J, Yi Y, Ahn TK, Choi HJ, Park CH, Chun DI, Lee JS, Lee WC. Failure to restore sagittal tibiotalar alignment in total ankle arthroplasty: Its relationship to the axis of the tibia and the positioning of the talar component. Bone Joint J 2016; 97-B:1525-32. [PMID: 26530656 DOI: 10.1302/0301-620x.97b11.33636] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [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] [Indexed: 11/05/2022]
Abstract
The purpose of this study was to evaluate the change in sagittal tibiotalar alignment after total ankle arthroplasty (TAA) for osteoarthritis and to investigate factors affecting the restoration of alignment. This retrospective study included 119 patients (120 ankles) who underwent three component TAA using the Hintegra prosthesis. A total of 63 ankles had anterior displacement of the talus before surgery (group A), 49 had alignment in the normal range (group B), and eight had posterior displacement of the talus (group C). Ankles in group A were further sub-divided into those in whom normal alignment was restored following TAA (41 ankles) and those with persistent displacement (22 ankles). Radiographic and clinical results were assessed. Pre-operatively, the alignment in group A was significantly more varus than that in group B, and the posterior slope of the tibial plafond was greater (p < 0.01 in both cases). The posterior slope of the tibial component was strongly associated with restoration of alignment: ankles in which the alignment was restored had significantly less posterior slope (p < 0.001). An anteriorly translated talus was restored to a normal position after TAA in most patients. We suggest that surgeons performing TAA using the Hintegra prosthesis should aim to insert the tibial component at close to 90° relative to the axis of the tibia, hence reducing posterior soft-tissue tension and allowing restoration of normal tibiotalar alignment following surgery.
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Affiliation(s)
- J Cho
- Seoul Paik Hospital, No. 85 2-Ga, Jeo-Dong, Jung-Gu, Seoul, 100-032, Republic of Korea
| | | | - T K Ahn
- Bundang CHA Hospital, No. 351, Yatap-Dong, Bundang-Gu, Sungnam, Kyunggi-Do, 463-070, Republic of Korea
| | - H J Choi
- Haeundae Paik Hospital, No. 875, Haeundae-Ro, Haeundae-Gu, Busan, 612-896, Republic of Korea
| | - C H Park
- Yeung-Nam University Hospital, No. 170, Hyunchung-Ro, Nam-Gu, Daegu, 705-040, Republic of Korea
| | - D I Chun
- Soonchunhyang University Medical Center, No. 59, Daesagwan-Ro, Yongsan-Gu, Seoul, 140-743, Republic of Korea
| | - J S Lee
- Asan Medical Center, Pungnap 2(i)-dong Songpa-gu Seoul, Republic of Korea
| | - W C Lee
- Seoul Paik Hospital, No. 85 2-Ga, Jeo-Dong, Jung-Gu, Seoul, 100-032, Republic of Korea
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Abstract
PURPOSE The aim of this study was to evaluate the outcome of reoperation in recurrent gastric cancers. MATERIALS AND METHODS We conducted a retrospective analysis of 86 patients who underwent reoperation for recurrent gastric cancer. We reviewed the time interval between first operation and reoperation, as well as the recurrence pattern, type of reoperation, and survival following reoperation. RESULTS the average time to reoperation following curative resection was 27.8+/-25.9 months (median 18.4 months). Fifty-three cases (61.6%) of reoperation were performed within 2 years follwoing the first operation. The most common reason for reoperation was intestinal obstruction followed by gastric remnant recurrence and intra-abdominal mass. Complete resection was possible in 14 cases (16.3%) and a palliative procedure such as partial resection or bypass procedures was performed in 54 cases. In 18 cases (20.9%), simple lapalotomy was done without any aid. The most common site of recurrence was the peritoneum followed by the gastric remnant, distant lymph node and hematogenous liver metastasis. Operative mortality was 10.5%. Excluding the 9 cases of operative mortality, the mean survival time after reoperation was 15.4+/-2.5 months (mean 8.6 months). Survival following complete resection was much longer than palliative procedure and exploration only (37.9+/-8.7 vs 10.9+/-1.5 vs 4.7+/-0.8 months, p=0.000). CONCLUSION The complete resection of recurrent gastric cancer can prolong survival. Early detection of localized recurrence is important in order to increase the chance of complete resection.
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Park CH, Kim TH, Lee S, Paik HC, Haam SJ. New predictive equation for lung volume using chest computed tomography for size matching in lung transplantation. Transplant Proc 2015; 47:498-503. [PMID: 25769597 DOI: 10.1016/j.transproceed.2014.12.025] [Citation(s) in RCA: 7] [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] [Received: 11/10/2014] [Accepted: 12/30/2014] [Indexed: 11/19/2022]
Abstract
PURPOSE Lung size matching is important in lung transplantation (LT). With advances in computed tomography (CT) technology, multidetector row CT can accurately measure the thoracic cage and lung volumes. The objective of this study was to generate a new regression equation using demographic data based on the measured CT lung volume in a healthy population to predict the CT lung volume of the donor in LT size matching. MATERIALS AND METHODS The medical records of healthy subjects who underwent chest CT scans to screen for lung cancer were retrospectively reviewed. CT lung volume was semi-automatically measured using a threshold-based auto-segmentation technique. New regression equations for CT lung volume were generated by multiple linear regression analysis using demographic data including height (H, cm), weight (W, kg), and age (A, years). The percentage error rate (%) of the equations were calculated as ([Estimated CT lung volume--Measured CT lung volume]/Measured CT lung volume × 100). A percentage error rate within ± 20% was considered acceptable. RESULTS A total of 141 men aged 27 to 55 years (mean, 46.7 ± 6.2 years) and 128 women aged 20 to 55 years (mean, 45.4 ± 7.2 years) were enrolled. The final regression equations for CT lung volume were (-5.890 + 0.067 H - 0.030 W + 0.020 A) in men and (-6.698 + 0.072 H - 0.024 W) in women. The mean absolute error rate was 10.9 ± 9.0% and 11.0 ± 8.5% in men and women, respectively. Percentage error rates were within ± 20% in 121 of 141 (85.8%) men and 113 of 128 (88.3%) women. CONCLUSION These equations could predict the CT lung volume of healthy subjects using demographic data. Using these equations, the predicted CT lung volume of donors could be matched to the measured CT lung volume of recipients in lung transplantation.
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Affiliation(s)
- C H Park
- Department of Radiology and the Research Institute of Radiological Science, Yonsei University Health System, Seoul, Republic of Korea
| | - T H Kim
- Department of Radiology and the Research Institute of Radiological Science, Yonsei University Health System, Seoul, Republic of Korea
| | - S Lee
- Department of Thoracic and Cardiovascular Surgery, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - H C Paik
- Department of Thoracic and Cardiovascular Surgery, Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - S J Haam
- Department of Thoracic and Cardiovascular Surgery, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea.
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Rasperini G, Pilipchuk SP, Flanagan CL, Park CH, Pagni G, Hollister SJ, Giannobile WV. 3D-printed Bioresorbable Scaffold for Periodontal Repair. J Dent Res 2015; 94:153S-7S. [PMID: 26124215 DOI: 10.1177/0022034515588303] [Citation(s) in RCA: 161] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Affiliation(s)
- G Rasperini
- Department of Biomedical, Surgical, and Dental Sciences, Unit of Periodontology, Foundation IRCCS Ca' Granda Polyclinic, University of Milan, Milan, Italy
| | - S P Pilipchuk
- Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, MI, USA Department of Biomedical Engineering, College of Engineering, University of Michigan, Ann Arbor, MI, USA
| | - C L Flanagan
- Department of Biomedical Engineering, College of Engineering, University of Michigan, Ann Arbor, MI, USA
| | - C H Park
- Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, South Korea
| | - G Pagni
- Department of Biomedical, Surgical, and Dental Sciences, Unit of Periodontology, Foundation IRCCS Ca' Granda Polyclinic, University of Milan, Milan, Italy
| | - S J Hollister
- Department of Biomedical Engineering, College of Engineering, University of Michigan, Ann Arbor, MI, USA Department of Surgery, School of Medicine, University of Michigan, Ann Arbor, MI, USA Department of Mechanical Engineering, College of Engineering, University of Michigan, Ann Arbor, MI, USA
| | - W V Giannobile
- Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, MI, USA Department of Biomedical Engineering, College of Engineering, University of Michigan, Ann Arbor, MI, USA
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Nally JV, Bedoya LA, Park CH, Martinez A, Stowe NT. Captopril-stimulated renography versus renal vein renins in two-kidney, two-clip hypertension. Contrib Nephrol 2015; 79:176-80. [PMID: 2225857 DOI: 10.1159/000418173] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Lee HN, Lee KS, Kim JC, Chung BH, Kim CS, Lee JG, Kim DK, Park CH, Park JK, Hong SJ. Rate and associated factors of solifenacin add-on after tamsulosin monotherapy in men with voiding and storage lower urinary tract symptoms. Int J Clin Pract 2015; 69:444-53. [PMID: 25363606 DOI: 10.1111/ijcp.12581] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/05/2014] [Accepted: 09/29/2014] [Indexed: 11/27/2022] Open
Abstract
AIM To explore the rate of add-on therapy with solifenacin in men with voiding and storage lower urinary tract symptoms (LUTS) after tamsulosin monotherapy and to explore predictive factors for starting solifenacin add-on therapy. METHODS Men aged ≥ 45 years with IPSS ≥ 12 and symptoms of OAB (OAB-V8 ≥ 8, micturition ≥ 8/24 h, urgency ≥ 2/24 h) were enrolled to receive tamsulosin 0.2 mg once daily. After 4 weeks, men with residual symptoms of OAB and reported 'dissatisfied' or 'a little satisfied' were received solifenacin 5 mg in combination with tamsulosin monotherapy. Subjects completed an IPSS, a Quality of life (QoL) index, OAB V8, and an International Consultation of Incontinence Questionnaire (ICIQ)-Male LUTS, and patient perception of bladder condition (PPBC) at baseline and week 4. RESULTS Of a total of 305 patients, 254 patients completed 4 weeks of tamsulosin treatment. For 176 patients, solifenacin was added (69.3%). Significant predictive factors of solifenacin add-on therapy included long LUTS duration, high IPSS, number of micturitions per 24 h, more urgency episodes, high urgency severity score in a voiding diary and high OAB V8 score. Based on multivariable analysis, potential predictive factors of solifenacin add-on therapy included long LUTS duration (OR = 1.008, 95% CI: 1.001-1.014), high serum PSA (OR = 1.543, 95% CI: 1.136-2.095) and small prostate size (OR = 0.970, 95% CI: 0.947-0.994) (p < 0.05). IPSS, daytime micturitions and urgency episodes, OAB V8 scores, ICIQ and PPBC were improved after tamsulosin monotherapy. CONCLUSIONS Two thirds of men with voiding and storage LUTS needed to add anticholinergics after 4 weeks of tamsulosin monotherapy. Patients with longer lasting symptoms and storage symptoms with small prostate volume may require the anticholinergic add-on.
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Affiliation(s)
- H N Lee
- Department of Urology, Seoul Seonam Hospital, Ewha Womans University, Seoul, Korea
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Oh KS, Lee JH, Yi KY, Lim CJ, Lee S, Park CH, Seo HW, Lee BH. The orally active urotensin receptor antagonist, KR36676, attenuates cellular and cardiac hypertrophy. Br J Pharmacol 2015; 172:2618-33. [PMID: 25597918 DOI: 10.1111/bph.13082] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Revised: 12/11/2014] [Accepted: 01/13/2015] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND AND PURPOSE Blockade of the actions of urotensin-II (U-II) mediated by the urotensin (UT) receptor should improve cardiac function and prevent cardiac remodelling in cardiovascular disease. Here, we have evaluated the pharmacological properties of the recently identified UT receptor antagonist, 2-(6,7-dichloro-3-oxo-2H-benzo[b][1,4]oxazin-4(3H)-yl)-N-methyl-N-(2-(pyrrolidin-1-yl)-1-(4-(thiophen-3-yl)phenyl) ethyl)acetamide (KR36676). EXPERIMENTAL APPROACH Pharmacological properties of KR36676 were studied in a range of in vitro assays (receptor binding, calcium mobilization, stress fibre formation, cellular hypertrophy) and in vivo animal models such as cardiac hypertrophy induced by transverse aortic constriction (TAC) or myocardial infarction (MI). KEY RESULTS KR36676 displayed high binding affinity for the UT receptor (Ki : 0.7 nM), similar to that of U-II (0.4 nM), and was a potent antagonist at that receptor (IC50 : 4.0 nM). U-II-induced stress fibre formation and cellular hypertrophy were significantly inhibited with low concentrations of KR36676 (≥0.01 μM). Oral administration of KR36676 (30 mg·kg(-1) ) in a TAC model in mice attenuated cardiac hypertrophy and myocardial fibrosis. Moreover, KR36676 restored cardiac function and myocyte size in rats with MI-induced cardiac hypertrophy. CONCLUSIONS AND IMPLICATIONS A highly potent UT receptor antagonist exerted anti-hypertrophic effects not only in infarcted rat hearts but also in pressure-overloaded mouse hearts. KR36676 could be a valuable pharmacological tool in elucidating the complicated physiological role of U-II and UT receptors in cardiac hypertrophy.
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Affiliation(s)
- K S Oh
- Research Center for Drug Discovery Technology, Korea Research Institute of Chemical Technology, Daejeon, Korea; Department of Medicinal and Pharmaceutical Chemistry, University of Science and Technology, Daejeon, Korea
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Lee YS, Lee KS, Kim JC, Hong S, Chung BH, Kim CS, Lee JG, Kim DK, Park CH, Park JK. Persistence with solifenacin add-on therapy in men with benign prostate obstruction and residual symptoms of overactive bladder after tamsulosin monotherapy. Int J Clin Pract 2014; 68:1496-502. [PMID: 25284747 DOI: 10.1111/ijcp.12483] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
AIMS In spite of the reported efficacy and safety of antimuscarinics in men with OAB (overactive bladder) and BPO (benign prostatic obstruction), many patients do not persist with the treatment. We aimed to evaluate persistence and the reasons for the discontinuation of solifenacin add-on therapy in men with residual symptoms of OAB after tamsulosin monotherapy for BPO in a real clinical environment. METHODS Men aged ≥ 45 years with IPSS ≥ 12 and symptoms of OAB (OAB-V8 ≥ 8, micturition ≥ 8/24 h, urgency ≥ 2/24 h) were prescribed tamsulosin 0.2 mg. After 4 weeks, men who had residual symptoms of OAB (OAB-V8 ≥ 8, micturition ≥ 8/24 h, urgency ≥ 1/24 h) and reported that they were 'dissatisfied' or 'a little satisfied' with the therapy were enrolled and prescribed solifenacin 5 mg in combination with tamsulosin. After 52 weeks, persistence and the reasons for the discontinuation of solifenacin were evaluated. Factors related to persistence were analysed. RESULTS Of the 305 men who had been treated with tamsulosin, 176 were prescribed solifenacin. After 52 weeks, 44 (25%) remained on solifenacin therapy. Of the 132 who discontinued solifenacin, 85 were evaluated on the reason for discontinuation. The three most common reasons for discontinuation were adverse events (AEs) (35%), lack of efficacy (33%), and improvement in symptoms (16%). The aggravation of voiding symptoms was the most common AE leading to discontinuation. Retention was observed in 11 men. None of the demographical or clinical characteristics were significantly related to persistence. CONCLUSIONS Only 25% men with OAB and BPO remained on antimuscarinic add-on therapy after 1 year, mostly because of AEs and lack of efficacy. Realistic data should be added to what is already known about antimuscarinic treatment in men by including patients who were excluded or who dropped out of well-designed clinical trials.
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Affiliation(s)
- Y-S Lee
- Department of Urology, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea
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Abstract
Physiologic bioengineering of the oral, dental, and craniofacial complex requires optimized geometric organizations of fibrous connective tissues. A computer-designed, fiber-guiding scaffold has been developed to promote tooth-supporting periodontal tissue regeneration and functional restoration despite limited printing resolution for the manufacture of submicron-scaled features. Here, we demonstrate the use of directional freeze-casting techniques to control pore directional angulations and create mimicked topographies to alveolar crest, horizontal, oblique, and apical fibers of natural periodontal ligaments. For the differing anatomic positions, the gelatin displayed varying patterns of ice growth, determined via internal pore architectures. Regardless of the freezing coordinates, the longitudinal pore arrangements resulted in submicron-scaled diameters (~50 µm), along with corresponding high biomaterial porosity (~90%). Furthermore, the horizontal + coronal ([Formula: see text]) freezing orientation facilitated the creation of similar structures to major fibers in the periodontal ligament interface. This periodontal tissue-mimicking microenvironment is a potential tissue platform for the generation of naturally oriented ligamentous tissues consistent with periodontal ligament neogenesis.
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Affiliation(s)
- C H Park
- Department of Periodontology, Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Republic of Korea Department of Nanobiomedical Science and BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, Republic of Korea Institute of Tissue Regeneration Engineering, Dankook University, Cheonan, Republic of Korea
| | - K H Kim
- Department of Periodontology, Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Republic of Korea
| | - H F Rios
- Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, MI, USA
| | - Y M Lee
- Department of Periodontology, Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Republic of Korea
| | - W V Giannobile
- Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, MI, USA Department of Biomedical Engineering, College of Engineering, University of Michigan, Ann Arbor, MI, USA
| | - Y J Seol
- Department of Periodontology, Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Republic of Korea
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Kim JH, Park CH, Perez RA, Lee HY, Jang JH, Lee HH, Wall IB, Shi S, Kim HW. Advanced biomatrix designs for regenerative therapy of periodontal tissues. J Dent Res 2014; 93:1203-11. [PMID: 25139364 DOI: 10.1177/0022034514540682] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Periodontitis is an inflammatory disease that causes loss of the tooth-supporting apparatus, including periodontal ligament, cementum, and alveolar bone. A broad range of treatment options is currently available to restore the structure and function of the periodontal tissues. A regenerative approach, among others, is now considered the most promising paradigm for this purpose, harnessing the unique properties of stem cells. How to make full use of the body's innate regenerative capacity is thus a key issue. While stem cells and bioactive factors are essential components in the regenerative processes, matrices play pivotal roles in recapitulating stem cell functions and potentiating therapeutic actions of bioactive molecules. Moreover, the positions of appropriate bioactive matrices relative to the injury site may stimulate the innate regenerative stem cell populations, removing the need to deliver cells that have been manipulated outside of the body. In this topical review, we update views on advanced designs of biomatrices-including mimicking of the native extracellular matrix, providing mechanical stimulation, activating cell-driven matrices, and delivering bioactive factors in a controllable manner-which are ultimately useful for the regenerative therapy of periodontal tissues.
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Affiliation(s)
- J H Kim
- Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan 330-714, Republic of Korea Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan 330-714, Republic of Korea
| | - C H Park
- Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan 330-714, Republic of Korea Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan 330-714, Republic of Korea
| | - R A Perez
- Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan 330-714, Republic of Korea Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan 330-714, Republic of Korea
| | - H Y Lee
- Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan 330-714, Republic of Korea Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan 330-714, Republic of Korea
| | - J H Jang
- Department of Biochemistry, Inha University School of Medicine, Incheon 400-712, Republic of Korea
| | - H H Lee
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan 330-714, Republic of Korea Department of Biomaterials Science, College of Dentistry, Dankook University, Cheonan 330-714, Republic of Korea
| | - I B Wall
- Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan 330-714, Republic of Korea Department of Biochemical Engineering, University College London, Torrington Place, London WC1E 7JE, United Kingdom
| | - S Shi
- Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan 330-714, Republic of Korea Center for Craniofacial Molecular Biology, Ostrow School of Dentistry, University of Southern California, Los Angeles, CA, USA
| | - H W Kim
- Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan 330-714, Republic of Korea Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan 330-714, Republic of Korea Department of Biomaterials Science, College of Dentistry, Dankook University, Cheonan 330-714, Republic of Korea
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Lee SL, Lee HH, Ko YH, Song KY, Park CH, Jeon HM, Kim SS. Relevance of hepatoduodenal ligament lymph nodes in resectional surgery for gastric cancer. Br J Surg 2014; 101:518-22. [PMID: 24615472 DOI: 10.1002/bjs.9438] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/18/2013] [Indexed: 12/22/2022]
Abstract
BACKGROUND Hepatoduodenal lymph node (HDLN) positivity is considered distant metastasis in gastric cancer according to the seventh American Joint Committee on Cancer (AJCC) classification. In contrast, the International Union Against Cancer seventh edition and the Japanese Gastric Cancer Association both consider HDLN as a regional lymph node that can be included in the context of a curative resection. The purpose of this study was to determine whether there was justification for considering HDLN involvement as a distant metastasis for which resectional surgery could not have survival benefit. METHODS This study enrolled consecutive patients with gastric cancer having D2 or greater resections, with removal and pathological assessment of the HDLN, between 1989 and 2009. The pathological stage of all patients was determined based on the seventh AJCC criteria, with HDLN included as a regional lymph node. RESULTS A total of 1872 patients had their HDLN removed, of whom 68 had a metastatic lymph node in the hepatoduodenal ligament. The 5-year survival rate of these 68 patients was 30 per cent, compared with 47·7 per cent for those with stage III (P < 0·001) and 9·8 per cent for those with stage IV (P = 0·007) HDLN-negative tumours. The 5-year survival rate of 41 patients with HDLN metastasis and no evidence of distant metastasis at any other site was significantly higher than that among 120 patients with stage IV disease without HDLN metastasis (P < 0·001), whereas 5-year survival did not differ between the 41 patients with stage I-III disease with HDLN metastasis and 568 patients with stage III tumours without HDLN metastasis (P = 0·184). HDLN metastasis was not a significant factor for survival in multivariable analysis. CONCLUSION It is inappropriate to include the HDLN in the distant metastatic lymph node group in gastric cancer. The seventh AJCC criteria for node grouping should be revised.
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Affiliation(s)
- S L Lee
- Department of Radiology, College of Medicine, Catholic University of Korea, Seoul, Korea
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Nahm HH, Park CH, Kim YS. Bistability of hydrogen in ZnO: origin of doping limit and persistent photoconductivity. Sci Rep 2014; 4:4124. [PMID: 24535157 PMCID: PMC3927214 DOI: 10.1038/srep04124] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2013] [Accepted: 02/03/2014] [Indexed: 11/09/2022] Open
Abstract
Substitutional hydrogen at oxygen site (HO) is well-known to be a robust source of n-type conductivity in ZnO, but a puzzling aspect is that the doping limit by hydrogen is only about 10(18) cm(-3), even if solubility limit is much higher. Another puzzling aspect of ZnO is persistent photoconductivity, which prevents the wide applications of the ZnO-based thin film transistor. Up to now, there is no satisfactory theory about two puzzles. We report the bistability of HO in ZnO through first-principles electronic structure calculations. We find that as Fermi level is close to conduction bands, the HO can undergo a large lattice relaxation, through which a deep level can be induced, capturing electrons and the deep state can be transformed into shallow donor state by a photon absorption. We suggest that the bistability can give explanations to two puzzling aspects.
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Affiliation(s)
- Ho-Hyun Nahm
- 1] Research Center for Dielectric and Advanced Matter Physics, Pusan National University, Pusan 609-735, Korea [2] Center for Correlated Electron Systems, Institute for Basic Science (IBS), Seoul 151-747, Korea [3] Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea [4] Korea Research Institute of Standards and Science, Yuseong, Daejeon 305-340, Korea
| | - C H Park
- Research Center for Dielectric and Advanced Matter Physics, Pusan National University, Pusan 609-735, Korea
| | - Yong-Sung Kim
- 1] Korea Research Institute of Standards and Science, Yuseong, Daejeon 305-340, Korea [2] Department of Nano Science, University of Science and Technology, Daejeon 305-350, Korea
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Abstract
BACKGROUND Serum vitamin D status, as indicated by 25-(OH)D, is inversely associated with glucose homeostasis, lipid profiles, and blood pressure. Evidence on the association of serum vitamin D with metabolic syndrome (MS) however, is very limited in post-menopausal women. AIM To investigate the association between serum vitamin D and MS. MATERIALS AND METHODS This study was a crosssectional study including 778 Korean adults who visited a health promotion center in a university hospital from January 2010 to May 2011. MS was defined according to the American Heart Association/National Heart, Lung, and Blood Institute criteria and the Korean Society for the Study of Obesity. MS and its individual components were assessed, as well as serum 25-(OH)D levels with a multiple logistic regression analysis. RESULTS The overall prevalence of the MS in participants of this study was 147 (18.9%). After multiple adjustments, compared with the highest quartile serum 25- (OH)D level group (19.9-55.9 ng/ml), the odds ratio for MS in the lowest level group (4.2-9.7 ng/ml) was 2.44 [95% confidence interval (CI)=1.32-4.48], in the lower level group (9.8- 14.1 ng/ml) was 2.20 (95% CI=1.24-3.90), and in the intermediate level group (14.3-19.8 ng/ml) was 1.81 (95% CI=1.02-3.20). Among the components of MS, the adjusted odds ratios for having an elevated blood pressure, and high triglyceride level in the lowest level group were 1.81 (95% CI, 1.15-2.85), 2.74 (95% CI, 1.64-4.57), respectively. CONCLUSIONS We found that a low serum 25-(OH)D level is significantly associated with the presence of MS and some metabolic components, especially the high triglyceride level and blood pressure in post-menopausal women.
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Affiliation(s)
- H R Song
- Department of Epidemiology, Graduate School of Public Health, Seoul National University, Seoul, Korea
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Jeon YB, Park KY, Moon JK, Park CH, Choi CH, Lee JI. Dobutamine induced cardiogenic shock due to systolic anterior motion after mitral valve repair. Anaesth Intensive Care 2013; 41:551-552. [PMID: 23808519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
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Park CH, Kim KO, Baek IH, Choi MH, Jang HJ, Kae SH, Kim JB, Baik GH, Shin WG, Kim KH, Kim HY. Differences in the risk factors of reflux esophagitis according to age in Korea. Dis Esophagus 2012; 27:116-21. [PMID: 23009198 DOI: 10.1111/j.1442-2050.2012.01417.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [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] [Indexed: 12/11/2022]
Abstract
The prevalence of gastroesophageal reflux disease in Korea has been believed to be low, but the incidence of gastroesophageal reflux disease in Korea is expected to increase because of the longer life expectancy and more ingestion of westernized food. The aim of this study was to report differences in the risk factors of reflux esophagitis (RE) according to age in Korea. We prospectively recruited the subjects who had RE among those who visited a health promotion center for upper gastrointestinal cancer surveillance at Hallym Medical Center (five institutions) between January 2008 and February 2009. The enrolled study participants comprised 742 subjects with RE and 1484 healthy controls. The independent risk factors of RE in young and adult group were male sex, smoking, coffee, body mass index ≥ 25, hiatal hernia, and Helicobacter pylori negativity. The risk factors of RE in elderly group were smoking, coffee, and hiatal hernia. The risk factors for RE according to age group were found to differ. In elderly group, Helicobacter pylori infection was not a significant protective factor contrary to young and adult groups.
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Affiliation(s)
- C H Park
- Department of Gastroenterology, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Korea
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Hwang SH, Jung KA, Lee WJ, Yang KH, Lee DW, Carter A, Park CH, Hunter DJ. Morphological changes of the lateral meniscus in end-stage lateral compartment osteoarthritis of the knee. Osteoarthritis Cartilage 2012; 20:110-6. [PMID: 22133800 DOI: 10.1016/j.joca.2011.11.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2011] [Revised: 11/01/2011] [Accepted: 11/08/2011] [Indexed: 02/08/2023]
Abstract
OBJECTIVE The aim of this study was to evaluate the morphological changes of the lateral meniscus in end-stage lateral compartment osteoarthritis (OA) of the knee. METHODS One hundred fifty-eight knee joints from 133 patients that subsequently underwent total knee joint arthroplasty from January 2008 to December 2009 were enrolled. There were 26 men and 107 women. Their ages ranged from 56 to 81 (mean 67.4 ± 6.5 years). All study participants had complete obliteration of the lateral joint space identified by weight-bearing radiography. Meniscal position was assessed by measuring meniscal subluxation and meniscal height. The meniscal morphology was assessed using a modification of the whole-organ magnetic resonance imaging score (WORMS). The frequency of different meniscal morphology and their respective positions was calculated. RESULTS The predominant type (42.4%, 53.8% and 52.5% in the anterior horn, mid-body and posterior horn, respectively) of abnormal meniscal morphology was a complete maceration/destruction or complete resection. The anterior horn of non-macerated lateral meniscus was more subluxed than that of the non-macerated medial meniscus in patients with lateral OA. CONCLUSION This study suggests that the lateral meniscus in persons with end-stage lateral OA are mostly macerated or destroyed. Also, unlike isolated end-staged medial compartment OA, the anterior horn of the lateral meniscus in isolated end-stage lateral OA is commonly affected.
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Affiliation(s)
- S H Hwang
- Joint & Arthritis Research, Department of Orthopaedic Surgery, Himchan Hospital, Seoul, Republic of Korea
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Park CH, Cheon JH, Kim JO, Shin JE, Jang BI, Shin SJ, Jeen YT, Lee SH, Ji JS, Han DS, Jung SA, Park DI, Baek IH, Kim SH, Chang DK. Criteria for decision making after endoscopic resection of well-differentiated rectal carcinoids with regard to potential lymphatic spread. Endoscopy 2011; 43:790-5. [PMID: 21735371 DOI: 10.1055/s-0030-1256414] [Citation(s) in RCA: 86] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND AND STUDY AIM Rectal carcinoids are low-grade malignancies that are usually treated by endoscopic resection. However, on pathologic examination, resection margins that are positive for carcinoid cells are frequently found. Patient outcomes were reviewed after endoscopic resection of rectal carcinoids and the clinical significance of possible residual disease, as defined by pathologic and endoscopic examination, was evaluated. PATIENTS AND METHODS The medical records and endoscopic findings of 347 patients presenting with rectal carcinoids to 14 university hospitals in Korea between January 1999 and June 2007 were retrospectively analyzed. RESULTS A total of 304 patients were treated with endoscopic resection, and 43 patents were treated with surgery. In the endoscopic resection group, the complete resection rate was 88.2% based on endoscopic appearance (CR-E) and 60.2% based on pathologic evaluation (CR-P). The agreement between CR-E and CR-P was low (κ=0.192). No residual tumors were found in 77 of 85 patients (90.6%) who were CR-E but not CR-P and who had endoscopic biopsy taken at 24-month follow-up. The receiver-operating characteristic curve identified an optimal cut-off value of 10.5 mm, at which the sensitivity and the specificity for metastasis were 100% and 89%, respectively. The risk factors for metastasis by multivariate analysis were tumor size, increased mitotic rate, and lymphovascular invasion. CONCLUSIONS Endoscopic resection is a safe and effective modality for treating well-differentiated rectal carcinoids smaller than 10 mm in diameter. Discrepancies were observed between CR-E and CR-P. The risk factors for metastasis were tumor size, increased mitotic rate, and lymphovascular invasion.
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Affiliation(s)
- C H Park
- Department of Internal Medicine, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea
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Kang SG, Park CH, Kim DK, Park JK, Hong SJ, Chung BH, Kim CS, Lee KS, Kim JC, Lee JG. Long-term outcome of tamsulosin for patients with lower urinary tract symptoms according to the treatment response defined by lower urinary tract symptom outcomes score. Int J Clin Pract 2011; 65:691-7. [PMID: 21564443 DOI: 10.1111/j.1742-1241.2011.02667.x] [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] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
UNLABELLED IMS: To evaluate long-term outcome of tamsuolsin 0.2 mg for benign prostatic hyperplasia (BPH) patients using a new subjective assessment of patient-reported outcomes and the lower urinary tract symptoms (LUTS) outcome score (LOS) over a 48-week period. METHODS This study investigated the long-term outcomes of either well-responded or poorly responded patient group as defined by LOS at the period of 12 weeks after BPH treatment. Outcome parameters used in this study were the most bothersome symptoms, BPH K1-short form as well as International Prostate Symptom Score (IPSS), maximum flow rate (Qmax) and postvoiding residual urine volume at 24-, 36- and 48-week follow-up. RESULTS Of the 414 patients recruited initially, 310 (75.2%) were defined as the responders and 39 (9.5%) as the non-responders to the treatment at 12 weeks, which was stratified by LOS. In this long-term study, the differences in improvement rates of clinical parameters between responder and non-responder groups at 12 weeks of treatment were maintained over the period of 48 weeks. Among the responder patients, most (75.6%) chose continuous administrations of tamsulosin. Improvements in clinical parameters were maintained in this subgroup. It is noteworthy that the improvements in clinical parameters of the non-responder group were dismal despite switching to the other treatment modalities. CONCLUSIONS Long-term tamsulosin 0.2 mg for BPH patients is an effective treatment, both subjectively and objectively. Considering its integrative nature, LOS seemed to be one of the useful tools to predict the outcome after the management of LUTS.
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Affiliation(s)
- S G Kang
- Department of Urology, Korea University College of Medicine, Seoul, Korea
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Park CH, Jeung KW, Min YI, Heo T. Sustained manual abdominal compression during cardiopulmonary resuscitation in a pig model: a preliminary investigation. Emerg Med J 2011; 27:8-12. [PMID: 20028997 DOI: 10.1136/emj.2008.070060] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
OBJECTIVES The present study was undertaken to determine whether sustained manual abdominal compression (SMAC) using left paramedian compression technique can improve coronary perfusion pressure (CPP) during cardiopulmonary resuscitation (CPR) and resuscitation outcomes without causing liver laceration. METHODS Ventricular fibrillation was induced in 14 pigs, and circulatory arrest was maintained for 6 min. Animals were resuscitated either by standard CPR (control group) or by standard CPR with SMAC (SMAC-CPR group). RESULTS Mean blood pressure, aortic diastolic pressure and right atrial diastolic pressure in the SMAC-CPR group were significantly greater than in the control group throughout simulated basic life support. However, since the increases in aortic and right atrial diastolic pressures were similar, no significant intergroup difference was found in terms of CPP. Return of spontaneous circulation (ROSC) was attained in four of seven animals in the control group and in six of seven animals in the SMAC-CPR group (p = 0.55). Three animals in the control group and four in the SMAC-CPR group survived 24 h after ROSC (p = 1.00). Two of the seven animals in the SMAC-CPR group had a ruptured liver, but no such injury occurred in the control group. CONCLUSIONS SMAC using left paramedian compression technique failed to improve CPP during CPR and resuscitation outcomes. Furthermore, this method could not avoid liver laceration.
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Affiliation(s)
- C H Park
- Department of Emergency Medicine, Chonnam National University Hospital, 671 Jebongno, Donggu Gwangju 501-757, South Korea
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Paik CN, Choi MG, Lim CH, Park JM, Chung WC, Lee KM, Jun KH, Song KY, Jeon HM, Chin HM, Park CH, Chung IS. The role of small intestinal bacterial overgrowth in postgastrectomy patients. Neurogastroenterol Motil 2011. [PMID: 21324050 DOI: 10.1111/j.1365-2982.2011.01686] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
BACKGROUND Small intestinal bacterial overgrowth (SIBO) is expected in postgastrectomy patients; however, its role has not been clarified. This study was to estimate the prevalence of SIBO and investigate the clinical role of SIBO in postgastrectomy patients. METHODS This prospective study involved 76 patients who underwent gastrectomy for early gastric cancer with no evidence of recurrence. An H(2)-CH(4) breath test with oral glucose challenge test was performed to diagnose SIBO and dumping syndrome. Sigstad dumping questionnaires, serum glucose, hematocrit and pulse rate were simultaneously monitored for every 30 min for 3 hours. KEY RESULTS There were significant differences in SIBO between the postgastrectomy patients and controls (77.6%vs 6.7%, P < 0.01). Abdominal fullness or borborygmus during oral glucose load were more common in SIBO-positive than in negative patients (50.8%vs 17.6%, P = 0.03), and were the independent factors for predicting SIBO in postgastrectomy patients (P = 0.02). The prevalences of dumping syndrome and hypoglycemia after oral glucose were 35 (46.1%) and 19 (25.0%), and were not different between both groups. However, the plasma glucose was significantly lower in SIBO-positive than in SIBO-negative patients at 120 and 150 min after oral glucose load (P < 0.05). No significant differences were observed in pulse rate and hematocrit in both groups. CONCLUSIONS & INFERENCES SIBO is common among postgastrectomy patients. It appears to be associated with postprandial intestinal symptoms and might aggravate late hypoglycemia. SIBO could be a new therapeutic target for managing intestinal symptoms in postgastrectomy patients.
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Affiliation(s)
- C N Paik
- Department of Internal Medicine, The Catholic University of Korea, Seoul, Korea
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Paik CN, Choi MG, Lim CH, Park JM, Chung WC, Lee KM, Jun KH, Song KY, Jeon HM, Chin HM, Park CH, Chung IS. The role of small intestinal bacterial overgrowth in postgastrectomy patients. Neurogastroenterol Motil 2011; 23:e191-6. [PMID: 21324050 DOI: 10.1111/j.1365-2982.2011.01686.x] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
BACKGROUND Small intestinal bacterial overgrowth (SIBO) is expected in postgastrectomy patients; however, its role has not been clarified. This study was to estimate the prevalence of SIBO and investigate the clinical role of SIBO in postgastrectomy patients. METHODS This prospective study involved 76 patients who underwent gastrectomy for early gastric cancer with no evidence of recurrence. An H(2)-CH(4) breath test with oral glucose challenge test was performed to diagnose SIBO and dumping syndrome. Sigstad dumping questionnaires, serum glucose, hematocrit and pulse rate were simultaneously monitored for every 30 min for 3 hours. KEY RESULTS There were significant differences in SIBO between the postgastrectomy patients and controls (77.6%vs 6.7%, P < 0.01). Abdominal fullness or borborygmus during oral glucose load were more common in SIBO-positive than in negative patients (50.8%vs 17.6%, P = 0.03), and were the independent factors for predicting SIBO in postgastrectomy patients (P = 0.02). The prevalences of dumping syndrome and hypoglycemia after oral glucose were 35 (46.1%) and 19 (25.0%), and were not different between both groups. However, the plasma glucose was significantly lower in SIBO-positive than in SIBO-negative patients at 120 and 150 min after oral glucose load (P < 0.05). No significant differences were observed in pulse rate and hematocrit in both groups. CONCLUSIONS & INFERENCES SIBO is common among postgastrectomy patients. It appears to be associated with postprandial intestinal symptoms and might aggravate late hypoglycemia. SIBO could be a new therapeutic target for managing intestinal symptoms in postgastrectomy patients.
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Affiliation(s)
- C N Paik
- Department of Internal Medicine, The Catholic University of Korea, Seoul, Korea
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Tang AH, Park CH, Liao Y, Ahmed AU, Reed NR, Hesse SE, Lingle WL, Jimenez RE, Tang AH. Abstract P6-15-14: Inhibit SIAH E3 Ligase, a Downstream Signaling Module Required for the HER2/EGFR/RAS Signal Transduction, To Block Tumorigenesis and Metastasis of Highly Invasive Human Breast Cancers. Cancer Res 2010. [DOI: 10.1158/0008-5472.sabcs10-p6-15-14] [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
The central importance of the HER2/Neu/EGFR/RAS signaling pathway has been well established in the growth, invasion and metastasis of human breast cancer, even though oncogenic RAS mutations are rare in breast cancer, activation of the tumor-promoting ERBB/RAS/MEK/MAPK pathway has been consistently documented in high-grade breast tumors. As such, novel approaches to inhibit activated ERBB/RAS signals constitute important measures to block tumor growth and metastasis in mammary tumors. In this study, instead of targeting an upstream signaling component such as HER2/EGFR/RAS, we targeted the most downstream signaling module identified in the RAS pathway — the SIAH proteolytic machinery. SIAH is an evolutionarily conserved RING E3 ligase that is a critical “gatekeeper” required for RAS signal transduction in human cancer cells. SIAH is specifically expressed in tumor cells in 120 human breast cancer patients examined so far. The increased SIAH expression is correlated with increased grades and aggressiveness of human breast cancer. We then asked whether inhibiting the gatekeeper function of SIAH would be effective in blocking mammary tumorigenesis and metastasis in human breast cancer. Our results indicated that SIAH2-deficiency successfully abolished tumor growth of three breast cancer cell lines (MDA-MB-231, MDA-MB-435 and MDA-MB-468) in soft agar assays as well as in athymic nude mice. Importantly, by inhibiting SIAH2 function in highly aggressive human breast cancer cells, we are able to completely block tumorigenesis and metastasis of two highly invasive and metastatic human breast cancer cell lines (MDA-MB-231 and MDA-MB-435). These findings suggest that SIAH2 may be an attractive new therapeutic target for novel breast cancer therapy and developing anti-SIAH molecules will aid in expanding our arsenal of effective anticancer therapies. More effective breast cancer treatments may be obtained by multi-pronged synergistic inhibitions at upstream (HER2/EGFR membrane receptors), midstream (RAS/RAF/MEK/mTOR) and downstream (SIAH E3 ligase) signaling modules in the HER2/EGFR/RAS pathway in parallel. Thus, by attacking the growth-promoting ERBB/RAS pathway at multiple signaling modules simultaneously, we may be in a great position to halt the genesis, progression and metastasis of human breast cancer.
Citation Information: Cancer Res 2010;70(24 Suppl):Abstract nr P6-15-14.
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Affiliation(s)
- AH Tang
- Mayo Clinic College of Medicine, Rochester, MN; Eastern Virginia Medical School, Norfolk, VA; University of Chicago, IL
| | - CH Park
- Mayo Clinic College of Medicine, Rochester, MN; Eastern Virginia Medical School, Norfolk, VA; University of Chicago, IL
| | - Y Liao
- Mayo Clinic College of Medicine, Rochester, MN; Eastern Virginia Medical School, Norfolk, VA; University of Chicago, IL
| | - AU Ahmed
- Mayo Clinic College of Medicine, Rochester, MN; Eastern Virginia Medical School, Norfolk, VA; University of Chicago, IL
| | - NR Reed
- Mayo Clinic College of Medicine, Rochester, MN; Eastern Virginia Medical School, Norfolk, VA; University of Chicago, IL
| | - SE Hesse
- Mayo Clinic College of Medicine, Rochester, MN; Eastern Virginia Medical School, Norfolk, VA; University of Chicago, IL
| | - WL Lingle
- Mayo Clinic College of Medicine, Rochester, MN; Eastern Virginia Medical School, Norfolk, VA; University of Chicago, IL
| | - RE Jimenez
- Mayo Clinic College of Medicine, Rochester, MN; Eastern Virginia Medical School, Norfolk, VA; University of Chicago, IL
| | - AH. Tang
- Mayo Clinic College of Medicine, Rochester, MN; Eastern Virginia Medical School, Norfolk, VA; University of Chicago, IL
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Shim HJ, Park CH, Kim MG, Lee SK, Yeo SG. A pre- and postoperative bacteriological study of chronic suppurative otitis media. Infection 2010; 38:447-52. [PMID: 20700754 DOI: 10.1007/s15010-010-0048-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2010] [Accepted: 07/21/2010] [Indexed: 11/27/2022]
Abstract
BACKGROUND Although many bacteriological studies on preoperative otorrhea in patients with chronic suppurative otitis media (CSOM) have been performed, there are few studies on postoperative otorrhea. In this study, we analyzed the pathogenic microorganisms, changes in the bacterial species before and after surgery, and the antibiotic sensitivity on preoperative and postoperative cultures. METHODS This was a retrospective study of 87 postoperative otorrhea patients who were part of a sample of 1,754 patients with CSOM who underwent tympanomastoidectomy; preoperative and postoperative otorrhea samples were obtained from January 2002 to April 2009. We analyzed patients with postoperative otorrhea divided into two groups: those with early onset (<3 months after surgery, n = 45) and those with late onset (>3 months after surgery, n = 42) otorrhea. RESULTS Four species of organisms, methicillin-sensitive Staphylococcus aureus (MSSA), methicillin-resistant S. aureus (MRSA), Pseudomonas, and coagulase-negative Staphylococcus (CNS), showed higher prevalence than others on both the preoperative and postoperative cultures. When we compared the early and late onset otorrhea groups, we found that 'no growth' was significantly higher in the early onset group (n = 19 vs. n = 5), whereas MSSA was significantly higher in the late onset group (n = 1 vs. n = 12). Of the 67 patients with positive preoperative cultures, 15 (22.4%) had the same bacteria after surgery, 34 (50.8%) had other bacteria, 2 (3.0%) had fungi, and 16 (23.8%) showed no growth on postoperative bacteriological testing. MSSA (9%) and MRSA (16.7%) were rarely recultured after surgery, whereas Pseudomonas was recultured frequently (61.5%). CONCLUSION Unlike MSSA and MRSA, ciprofloxacin-resistant P. aeruginosa (CRP) occasionally causes early onset postoperative otorrhea due to the lack of highly potent antibiotics against this species. The success rate of infection control by surgery and antibiotics was low for CRP.
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Affiliation(s)
- H J Shim
- Department of Otolaryngology, College of Medicine, EulJi University, Seoul, Korea
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Yokozawa T, Kang KS, Park CH, Noh JS, Yamabe N, Shibahara N, Tanaka T. Bioactive constituents of Corni Fructus: The therapeutic use of morroniside, loganin, and 7-O-galloyl-D-sedoheptulose as renoprotective agents in type 2 diabetes. Drug Discov Ther 2010; 4:223-234. [PMID: 22491205] [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: 05/31/2023]
Abstract
Corni Fructus, the fruit of Cornus officinalis Sieb. et Zucc. (Cornaceae), is an important crude herb used in Chinese medicine to exhibit several biological activities, including hypoglycemic, antineoplastic, and antimicrobial effects, and to improve liver and kidney functions. We have been investigating the mechanism and bioactive constituents of Corni Fructus using diabetic animal models. Morroniside, loganin, and 7-O-galloyl-D-sedoheptulose, the main active compounds of Corni Fructus, exhibit the same lowering effects of elevated triglyceride, oxidative stress and advanced glycation endproduct (AGE) formation in the kidney of db/db mice. The effects of morroniside and 7-O-galloyl-D-sedoheptulose were mediated through modulation by renal sterol regulatory element binding proteins and nuclear factor-kappa B expression, but the effect of loganin was presumably mediated by hypoglycemic and antioxidant effects in the kidney, and also indirectly by the amelioration of metabolic disorders in other organs such as the liver. These findings led us to conclude that morroniside, loganin, and 7-O-galloyl-D-sedoheptulose would synergistically contribute to the inhibition of metabolic disorders (hyperglycemia and dyslipidemia), oxidative stress, inflammation, as well as AGE formation in the diabetic kidney.
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Affiliation(s)
- T Yokozawa
- Institute of Natural Medicine, University of Toyama, Toyama, Japan
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Song KY, Hur H, Jung CK, Jung ES, Kim SN, Jeon HM, Park CH. Impact of tumor infiltration pattern into the surrounding tissue on prognosis of the subserosal gastric cancer (pT2b). Eur J Surg Oncol 2010; 36:563-7. [PMID: 20462730 DOI: 10.1016/j.ejso.2010.04.006] [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] [Received: 05/06/2009] [Revised: 02/05/2010] [Accepted: 04/12/2010] [Indexed: 10/19/2022] Open
Abstract
BACKGROUND The aim of this study was to clarify the impact of infiltration pattern on prognosis in patients with gastric carcinoma invading subserosa. METHODS Clinicopathologic findings in patients with ssgamma pattern (n = 144) were compared with those in patients with ssalpha/ssbeta cancers (n = 222). Prognostic factors of pT2b patients were analyzed by univariate and multivariate analysis. RESULTS Compared with the ssalpha/beta group, ssgamma gastric cancer exhibited more frequent undifferentiated histology, disseminated lymph node metastasis and perineural invasion. Frequency of postoperative peritoneal recurrence was significantly higher in ssgamma gastric cancer (P < 0.05). The 5-year survival rate for patients with ssgamma gastric cancer was significantly lower compared with ssalpha/beta group (63.2% vs. 74.8%, respectively; P < 0.05). Lymph node metastasis, vein invasion and infiltrative pattern (ssgamma) were significant independent prognostic factors affecting survival in pT2b patients. CONCLUSION In patients with gastric cancer invading the subserosa, infiltrative type growth pattern is closely related to carcinomatosis and poorer prognosis.
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Affiliation(s)
- K Y Song
- Department of Surgery, Division of Gastrointestinal Surgery, The Catholic University of Korea, College of Medicine, Seoul, Seoul St. Mary's Hospital. 505 Banpo-dong, Seocho-gu, Seoul 137-701 Republic of Korea
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Abstract
The standard treatment for a nasal bone fracture is closed reduction within 10 days. After that time, callus and fibrous connective tissue will limit a precise reduction. This study evaluated endoscopically assisted reduction for the treatment of nasal bone fractures in patients who miss the optimal operating time. Fifteen patients underwent endoscopically assisted correction of nasal bone fractures. The surgery was performed with the patients under general anesthesia. An intercartilaginous incision was made. The depressed bony fragments were repositioned under endoscopic visualization. In all cases, good anatomic reduction was obtained, the postoperative course was uneventful, with no complications, and the patients were satisfied with the shape of their noses. Endoscopy appears to be the best tool for visualizing intraoperative repositioning control, enabling the surgeon to confirm a fracture site with callus and to perform an accurate reduction. Endoscopically assisted reduction provides an alternative option in the treatment of patients outside the optimal temporal window for surgery.
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Affiliation(s)
| | - T K Kwon
- Department of Otorhinolaryngology-Head and Neck Surgery, Facial Skeleton Bio Institute,School of Medicine, Hallym University, Chuncheon, Korea
| | - J H Lee
- Department of Otorhinolaryngology-Head and Neck Surgery, School of Medicine, Hallym University, Chuncheon, Korea
| | - S J Hong
- Department of Otorhinolaryngology-Head and Neck Surgery, School of Medicine, Hallym University, Chuncheon, Korea
| | - H H Joung
- Department of Otorhinolaryngology-Head and Neck Surgery, School of Medicine, Hallym University, Chuncheon, Korea
| | - H S Kim
- Department of Otorhinolaryngology-Head and Neck Surgery, School of Medicine, Hallym University, Chuncheon, Korea
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Jung HS, Huh K, Shin YH, Kim JK, Yun CS, Park CH, Jang JB. Left-sided gallbladder: a complicated percutaneous cholecystostomy and subsequent hepatic embolisation. Br J Radiol 2009; 82:e141-4. [PMID: 19541942 DOI: 10.1259/bjr/59092209] [Citation(s) in RCA: 5] [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: 12/17/2022] Open
Abstract
A 68-year-old male patient with chronic hypertension, diabetes mellitus and chronic renal failure was diagnosed with acute calculous cholecystitis. A percutaneous cholecystostomy using a transperitoneal approach was performed after two failed attempts with a right-sided transhepatic approach. Subsequent hepatic embolisation was performed for the treatment of haemoperitoneum due to hepatic injury after the percutaneous cholecystostomy. The presence of a left-sided gallbladder was confirmed by laparoscopic cholecystectomy after 1 week. Prior identification of this anomaly would have prevented hepatic injury through the use of a cautious procedure against mobility or careful selection of the approach routes. In conclusion, the transperitoneal approach can be easier or more preferable to perform for a percutaneous cholecystostomy of a left-sided gallbladder.
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Affiliation(s)
- H S Jung
- Department of Diagnostic Radiology, Bongsaeng Memorial Hospital, Busan, Korea.
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Park CH, Duker JS, Mainster MA, Puliafito CA, Reichel E. Transpupillary thermotherapy (TTT) of occult choroidal neovascularization: A retrospective, noncomparative case series of fifty-seven eyes. Semin Ophthalmol 2009; 16:66-9. [PMID: 15491006 DOI: 10.1076/soph.16.2.66.4208] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
PURPOSE To evaluate the efficacy of transpupillary thermotherapy (TTT) for the treatment of occult choroidal neovascularization. METHODS A retrospective, noncomparative case series of 57 eyes of 52 patients who presented with occult subfoveal CNV and were treated with TTT. RESULTS 83% of eyes were either stable (+/- one line) or showed improvement in visual acuity. 83% of eyes showed stabilization of their exudative process after one TTT treatment as evidenced by resorption of subretinal and/or intraretinal exudate or hemorrhage. Nine percent of eyes developed classic CNV during the mean follow-up time of ten months. CONCLUSIONS TTT appears to stabilize the exudative process in eyes with occult CNV. A prospective, sham-controlled, randomized study (TTT4CNV Clinical Trial) is currently underway to directly compare TTT to the natural history of occult CNV.
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Affiliation(s)
- C H Park
- Ophthalmology Department, New England Eye Center, Tufts University School of Medicine, Boston, MA, USA
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Kim YS, Park CH. Rich variety of defects in ZnO via an attractive interaction between O vacancies and Zn interstitials: origin of n-type doping. Phys Rev Lett 2009; 102:086403. [PMID: 19257760 DOI: 10.1103/physrevlett.102.086403] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2008] [Indexed: 05/20/2023]
Abstract
As the concentration of intrinsic defects becomes sufficiently high in O-deficient ZnO, interactions between defects lead to a significant reduction in their formation energies. We show that the formation of both O vacancies and Zn interstitials becomes significantly enhanced by a strong attractive interaction between them, making these defects an important source of n-type conductivity in ZnO.
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Affiliation(s)
- Yong-Sung Kim
- Korea Research Institute of Standards and Science, P.O. Box 102, Yuseong, Daejeon 305-600, Korea.
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Park JS, Park DI, Park SK, Choi JS, Kim YH, Chang DK, Son HJ, Kim JE, Kim JO, Lee SH, Kim HS, Sin JE, Lee SG, Lee SY, Park SJ, Park CH, Baek IH, Jang BI, Jeen YT, Huh KC. Endoscopic evaluation of significant gastrointestinal lesions in patients with iron deficiency with and without anaemia: a Korean Association for the Study of Intestinal Disease study. Intern Med J 2008; 39:441-6. [PMID: 19220549 DOI: 10.1111/j.1445-5994.2008.01785.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
BACKGROUND Although endoscopy is recommended for patients with iron deficiency anaemia, there is, currently, no consensus on the role of endoscopy for iron-deficient patients without anaemia. The goal of this study was to determine the prevalence of serious gastrointestinal (GI) lesions, identified by endoscopy in patients with iron deficiency and anaemia compared with patients with iron deficiency without anaemia. METHODS One thousand five hundred and eighteen patients with a ferritin value of <or=50 ng/mL and a total iron-binding capacity >or=300 mg/dL were retrospectively investigated using oesophagogastroduodenoscopy and colonoscopy between January 2005 and September 2006. The lesions identified were classified as clinically important according to standard predetermined criteria. RESULTS Among the 1518 cases, 749 patients had anaemia and 769 had normal haemoglobin levels. Clinically important lesions were identified in 24.6% of the patients with anaemia and in 22.8% of the patients without anaemia (P > 0.05). The frequency of lower GI tract lesions (13.6 vs 11.4%, P > 0.05) and upper GI tract lesions (11.9 vs 12.5%, P > 0.05) was similar in the comparisons between the two groups. However, the frequency of malignant GI lesions was higher in the patients with anaemia (5.1 vs 0.7%, P < 0.01). In addition, the patients without anaemia were significantly more likely to have early-stage neoplasia (adenoma, early gastric cancer and Dukes' A and B colon cancer) than were the patients with anaemia (98.4 vs 52.5%, P < 0.01). CONCLUSION The results of this study suggest that patients with iron deficiency should undergo endoscopic evaluation of the GI tract, irrespective of whether they have anaemia. The endoscopic evaluation of the GI tract in patients with iron deficiency without anaemia could provide an opportunity for the detection of early-stage neoplasia at a curable stage.
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Affiliation(s)
- J S Park
- Department of Internal Medicine, Kangbuk Samsung Hospital, Seoul, Korea
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Abstract
Prolongation of the corrected QT (QTc) interval is associated with various anaesthetic drugs. The QTc prolongation may become more exacerbated during laryngoscopy and intubation, which is possibly caused by sympathetic stimulation. The aim of this study was to investigate the effects of fentanyl on the QTc interval during propofol induction in healthy patients. The patients were randomly allocated to receive either fentanyl (n = 25) or saline (n = 25) before induction. The QTc interval was significantly prolonged immediately after intubation in control group compared to preceding values, but it did not change in the fentanyl group. The number of patients with the prolonged QTc interval exceeding 20 ms immediately after intubation compared to the baseline values was 14 in the control group and seven in the fentanyl group. In conclusion, pretreatment with fentanyl 2 microg x kg(-1) significantly attenuated QTc prolongation associated with laryngoscopy and tracheal intubation during propofol induction.
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Affiliation(s)
- D J Chang
- Department of Anaesthesiology and Pain Medicine, Yonsei University College of Medicine, Seoul, Korea
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