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Choi KH, Park SC. An increasing tendency of precocious puberty among Korean children from the perspective of COVID-19 pandemic effect. Front Pediatr 2022; 10:968511. [PMID: 36090560 PMCID: PMC9454605 DOI: 10.3389/fped.2022.968511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Accepted: 08/03/2022] [Indexed: 12/02/2022] Open
Abstract
INTRODUCTION This study was conducted to investigate changes and new trends over the past 6 years by analyzing the current status of precocious puberty (PP) treatment and treatment costs in Korea between 2016 and 2021. MATERIALS AND METHODS Annual and monthly number of patients diagnosed with PP from 2016 to 2021 were reviewed using the data from Healthcare Bigdata Hub. Annual medical insurance expenses for the treatment of PP were also reviewed. The data were compared by the gender of the patients. RESULTS The number of patients diagnosed with PP rose from 86,352 in 2016 to 166,645 in 2021, while medical expenses rose from KRW 64,111,689,000 in 2016 to KRW 134,642,100,000 in 2021. The percentage of male PP patients increased from 9.21% in 2016 to 19.55% in 2021. CONCLUSION Increasing numbers of Korean patients diagnosed with PP. Consistent with the situation in other countries, the rapid increase in the number of cases since April 2020 appears to be a result of the COVID-19 pandemic. In Korea, this is considered a nationwide phenomenon. Also on the rise is the incidence of PP in males, which appears to be due to an increased awareness of the phenomenon. Further investigations are required to determine the possible causes in increasing prevalence of PP.
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Abstract
BACKGROUND Patellar tendinopathy is a common cause of limitations in daily life activities in young and/or active people. The patellar tendon consists of a complex of collagen fibers; therefore, collagen could be used as a scaffold in the treatment of patellar tendinopathy. PURPOSE To evaluate the healing capacity of injected atelocollagen as a treatment scaffold for patellar tendon defect and, hence, its potential for the treatment of patellar tendinopathy. STUDY DESIGN Controlled laboratory study. METHODS After receiving a full-thickness patellar tendon defect, 24 New Zealand White rabbits were divided into a control group (without treatment) and an experimental group that received an atelocollagen injection into the defect. Six rabbits from each group were subsequently used for either histologic scoring or biomechanical testing. The Mann-Whitney U test was used to compare histologic evaluation scores and load to failure between the 2 groups. Statistical significance was set at P < .05. RESULTS The experimental group showed excellent repair of the damaged patellar tendon and good remodeling of the defective area. In contrast, the control group showed defective healing with loose, irregular matrix fibers and adipose tissue formation. A statistically significant difference was found between the 2 groups in both histologic scores and biomechanical tests at postoperative week 12. CONCLUSION Injection of atelocollagen significantly improved the regeneration of damaged patellar tendons. CLINICAL RELEVANCE Atelocollagen gel injections could be used to treat patellar tendinopathy in outpatient clinic settings.
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Affiliation(s)
- Duck Kyu Kim
- Department of Orthopaedic Surgery, Barosun Hospital, Seoul, Republic of Korea
| | - Jiyong Ahn
- Department of Orthopaedic Surgery, College of Medicine, Catholic University of Korea, Seoul, Republic of Korea
| | - Seon Ae Kim
- Department of Orthopaedic Surgery, College of Medicine, Catholic University of Korea, Seoul, Republic of Korea
| | - Eun Jeong Go
- Department of Orthopaedic Surgery, College of Medicine, Catholic University of Korea, Seoul, Republic of Korea
| | - Dong Hwan Lee
- Department of Orthopaedic Surgery, College of Medicine, Catholic University of Korea, Seoul, Republic of Korea
| | - Seung Chan Park
- Department of Orthopaedic Surgery, College of Medicine, Catholic University of Korea, Seoul, Republic of Korea
| | - Asode Ananthram Shetty
- Institute of Medical Sciences, Faculty of Medicine and Social Care, Canterbury Christ Church University, Canterbury, Kent, UK
| | - Seok Jung Kim
- Department of Orthopaedic Surgery, College of Medicine, Catholic University of Korea, Seoul, Republic of Korea
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Park SC, Trinh TA, Lee WY, Baek JY, Lee S, Choi K, Ha J, Kim CE, Kang KS, Lee HL. Effects of estrogen inhibition formula herbal mixture for danazol-induced precocious puberty in female rats: an experimental study with network pharmacology. Integr Med Res 2020; 10:100708. [PMID: 33665096 PMCID: PMC7903350 DOI: 10.1016/j.imr.2020.100708] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 11/28/2020] [Accepted: 11/30/2020] [Indexed: 11/25/2022] Open
Abstract
Background This study aimed at determining the effect of the herbal mixture estrogen inhibition formula (EIF) and its possible mechanisms by precocious puberty animal models and network pharmacology-based analysis. Methods Precocious puberty animal models were established by a single injection of 300 μg danazol, then female rats were administered EIF, vaginal openings were monitored, uterus and pituitary indices were determined. The levels of ALP, E2, LH, and FSH were measured using ELISA kits. Real-time PCR was performed to evaluate the mRNA expression of GnRH, UNC5C, and netrin-1 in hypothalamic tissues. We applied network pharmacological analysis to predict potential targets and pathways of EIF. Results EIF delayed danazol-induced early vaginal opening. In the onset model, EIF reduced the increased levels of serum ALP, E2, LH, and FSH; as well as mRNA expressions of GnRH, Netrin-1, and UNC5C. Moreover, long-term administration of EIF not only diminished all impaired factors but also had no effect on the normal development of the animals. The gene set enrichment analysis showed that the targets of EIF are mainly associated with the GnRH signaling and ovarian steroidogenesis pathways. Conclusion EIF could be used in preclinical research for the treatment of precocious puberty by the inhibition of HPGA pre-maturation.
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Affiliation(s)
| | - Tuy An Trinh
- College of Korean Medicine, Gachon University, Seongnam, Republic of Korea
| | - Won-Yung Lee
- College of Korean Medicine, Gachon University, Seongnam, Republic of Korea
| | - Ji Yun Baek
- College of Korean Medicine, Gachon University, Seongnam, Republic of Korea
| | - Seungyong Lee
- Highki Korean Medicine Clinic, Seoul, Republic of Korea
| | - Kyuhee Choi
- Highki Korean Medicine Clinic, Seoul, Republic of Korea
| | - Jaewon Ha
- Highki Korean Medicine Clinic, Seoul, Republic of Korea
| | - Chang-Eop Kim
- College of Korean Medicine, Gachon University, Seongnam, Republic of Korea
| | - Ki Sung Kang
- College of Korean Medicine, Gachon University, Seongnam, Republic of Korea
| | - Hye Lim Lee
- Department of Pediatrics, College of Korean Medicine, Daejeon University, Daejeon, Republic of Korea
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Abstract
BACKGROUND: Long-term mortality following tuberculosis (TB) diagnosis in Korea remains unclear.METHODS: The present study used data from the National Health Insurance Service database, an extensive health-related database including most Korean residents. TB patients were identified using International Classification of Diseases, Tenth Revision coding (A15-19, U88.0-88.1) and the type of anti-TB drug(s) between 2003 and 2016. Long-term mortality and causes of death in TB patients were analysed.RESULTS: A total of 357 211 individuals had TB over the period from 2003 to 2016 and 103 682 died. The mean age of the cohort was 54.7 ± 20.7 years, and 59.8% were male. The survival probability of TB patients at 1, 5, and 10 years after diagnosis was 87.8%, 75.3%, and 63.3%, respectively. High mortality and TB-related death rates were especially prominent in the early stages after TB diagnosis. The overall standardized mortality ratio of TB patients to the general Korean population was 3.23 (95% confidence interval 3.21-3.25).CONCLUSION: Mortality in TB patients was especially high in the early stages of disease after TB diagnosis, and mostly due to TB. This figure was approximately three-times higher than the mortality rate in the general population.
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Affiliation(s)
- S C Park
- Division of Pulmonology, Department of Internal Medicine, National Health Insurance Service Ilsan Hospital, Goyang-si, Gyeonggi-do
| | - M J Kang
- Research Institute, National Health Insurance Service Ilsan Hospital, Goyang-si, Gyeonggi-do
| | - C H Han
- Division of Pulmonology, Department of Internal Medicine, National Health Insurance Service Ilsan Hospital, Goyang-si, Gyeonggi-do
| | - S M Lee
- Division of Pulmonology, Department of Internal Medicine, National Health Insurance Service Ilsan Hospital, Goyang-si, Gyeonggi-do
| | - C J Kim
- Division of Pulmonology, Department of Internal Medicine, National Health Insurance Service Ilsan Hospital, Goyang-si, Gyeonggi-do
| | - J M Lee
- Division of Pulmonology, Department of Internal Medicine, National Health Insurance Service Ilsan Hospital, Goyang-si, Gyeonggi-do
| | - Y A Kang
- Division of Pulmonology, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea
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Shim SB, Choi KH, Lee SY, Lee JJ, Bu MS, Lee JA, Jung IC, Park YC, Park SC, Lee HL. Herbal medicine (Jogyeongseongjang decoction) for precocious puberty girls: a retrospective study. Integr Med Res 2020; 9:100393. [PMID: 32322481 PMCID: PMC7168766 DOI: 10.1016/j.imr.2020.02.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Indexed: 11/18/2022] Open
Affiliation(s)
- Soo Bo Shim
- Department of Pediatrics, College of Korean Medicine, Daejeon University, Daejeon, Republic of Korea
| | - Kyu Hee Choi
- Highki Korean Medicine Clinic, Seoul, Republic of Korea
| | | | - Jae Jun Lee
- Highki Korean Medicine Clinic, Seoul, Republic of Korea
| | - Min Seok Bu
- Highki Korean Medicine Clinic, Seoul, Republic of Korea
| | - Ju Ah Lee
- Hwa-pyeong Institute of Integrative Medicine, Incheon, Republic of Korea
| | - In Chul Jung
- Department of Oriental Neuropsychiatry, College of Korean Medicine, Daejeon University, Daejeon, Republic of Korea
| | - Yang Chun Park
- Division of Respiratory System, Department of Internal Medicine, College of Korean Medicine, Daejeon University, Daejeon, Republic of Korea
| | - Seung Chan Park
- Highki Korean Medicine Clinic, Seoul, Republic of Korea
- Corresponding authors at: Highki Korean Medicine Clinic, 5F, Building 6, 205 Shinbanpo-ro, Seocho-gu, Seoul, Republic of Korea (S.C. Park); Department of Oriental Pediatrics, Dunsan Korean Medicine Hospital of Daejeon, 59 Daedeok-daero 176-beon-gil, Seo-gu, Daejeon, Republic of Korea (H.L. Lee).
| | - Hye Lim Lee
- Department of Pediatrics, College of Korean Medicine, Daejeon University, Daejeon, Republic of Korea
- Corresponding authors at: Highki Korean Medicine Clinic, 5F, Building 6, 205 Shinbanpo-ro, Seocho-gu, Seoul, Republic of Korea (S.C. Park); Department of Oriental Pediatrics, Dunsan Korean Medicine Hospital of Daejeon, 59 Daedeok-daero 176-beon-gil, Seo-gu, Daejeon, Republic of Korea (H.L. Lee).
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Abstract
Patients who commit self-wrist cutting injuries (SWCIs) are a heterogeneous group composed of patients with non-suicidal self-injury (NSSI) and suicide attempt (SA). The purpose of this study was to compare the demographic features and wound characteristics of patients with NSSI and SA.A retrospective review of 300 patients who visited the emergency department (ED) for treatment of SWCIs between January 2011 and December 2015 was performed. Data collected from the electronic medical records included age, sex, the reason for SWCIs, presence of suicidal ideation, concomitant intoxication with alcohol or drugs, past psychiatric history, whether or not the patient received psychiatric counseling at the ED, the principal psychiatric diagnosis, the number and severity of external wounds, and subsequent follow-up at the psychiatric or hand surgery outpatient department (OPD). The patients were divided into the NSSI and SA groups according to the presence of suicidal ideation and other variables were compared between the two groups.There were 138 NSSI patients and 162 SA patients. The NSSI group was younger (33.9 years vs 40.9 years, P < .01), more female-dominant, and more non-compliant with psychiatric treatment than the SA group. Compared with the SA group, fewer NSSI patients had past psychiatric histories (26.1% vs 45.7%, P < .01) and more patients refused psychiatric counseling (30.4% vs 9.9%, P < .01) and follow-up at the psychiatric OPD (8.0% vs 17.3%, P < .01). In contrast, the number (P = .31) and severity (P = .051) of wounds and the rate of follow-up at the hand surgery OPD (P = .43) were not statistically different between the two groups.Although the NSSI and SA groups showed different demographic features and degrees of compliance with psychiatric treatment, wound characteristics were not different between the two groups. Therefore, hand surgeons cannot estimate patients' suicidal intent based on wound characteristics and all patients should be advised to receive psychiatric treatment.
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Park HJ, Chang DG, Park JB, Kim WJ, Song KJ, Min WK, Park SC. Radiologic criteria to predict injury of the transverse atlantal ligament in unilateral sagittal split fractures of the C1 lateral mass. Medicine (Baltimore) 2019; 98:e17077. [PMID: 31490410 PMCID: PMC6739003 DOI: 10.1097/md.0000000000017077] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Unilateral sagittal split fracture (USSF) of the C1 lateral mass (LM) has been recently recognized as a rare variant of C1 atlas fracture. To date, there has been no study to investigate whether radiologic criteria can be applied to determine the presence or absence of transverse atlantal ligament (TAL) injury in USSF of the C1 LM.Twenty six consecutive cases of USSF of the C1 LM were included in this study. According to Dickman classification, 16 cases were TAL injury, and 10 cases were TAL intact. Radiologic parameters were measured and compared between the 2 groups.Total LM displacement (LMD) of the 2 sides (5.9 ± 2.0 mm vs 1.2 ± 2.0 mm), unilateral LMD of the fracture side (4.3 ± 1.2 mm vs 1.0 ± 1.1 mm), atlanto-dental interval (ADI) (2.0 ± 0.9 mm vs 1.5 ± 0.4 mm), and fracture gap (6.9 ± 2.7 mm vs 2.1 ± 1.1 mm) were statistically higher in the TAL injury group than the TAL intact group. However, basion-dental interval, clivus canal angle, and atlanto-occipital joint axis angle were not different between the 2 groups. Total LMD and unilateral LMD positively correlated with ADI and fracture gap. The incidence of fracture gap larger than 7 mm was statistically higher in the TAL injury group than the TAL intact group (81% vs 30%).In conclusion, total LMD > 5.9 mm or unilateral LMD > 4.3 mm suggests the presence of TAL injury in USSF of the C1 LM. The possibility of diagnostic error for TAL injury can be further reduced in USSF of the C1 LM by considering the fracture gap larger than 7 mm.
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Affiliation(s)
- Heui-Jeon Park
- Department of Orthopaedic Surgery, Yonsei University Wonju College of Medicine, Wonju
| | - Dong-Gune Chang
- Department of Orthopaedic Surgery, Sanggye Paik Hospital, College of Medicine, Inje University
| | - Jong-Beom Park
- Department of Orthopaedic Surgery, College of Medicine, The Catholic University of Korea, Seoul
| | - Whoan Jeang Kim
- Department of Orthopaedic Surgery, College of Medicine, Eulji University Hospital, Daejeon
| | - Kyung-Jin Song
- Department of Orthopaedic Surgery, College of Medicine, Chonbuk National University, Jeonju
| | - Woo-Kie Min
- Department of Orthopaedic Surgery, College of Medicine, Kyungbuk National University, Daegu, Korea
| | - Seung Chan Park
- Department of Orthopaedic Surgery, College of Medicine, The Catholic University of Korea, Seoul
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Giri SS, Ryu EC, Sukumaran V, Park SC. Antioxidant, antibacterial, and anti-adhesive activities of biosurfactants isolated from Bacillus strains. Microb Pathog 2019; 132:66-72. [PMID: 31028863 DOI: 10.1016/j.micpath.2019.04.035] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Revised: 04/19/2019] [Accepted: 04/23/2019] [Indexed: 11/15/2022]
Abstract
Biosurfactants are surface-active compounds that display a range of physiological functions. The present study investigated the antioxidant, antimicrobial, and anti-adhesive or anti-biofilm potential of biosurfactants isolated from Bacillus subtilis VSG4 and Bacillus licheniformis VS16. The antioxidant activity of the biosurfactants was studied in vitro using 2,2-diphenyl-1-picrylhydrazyl (DPPH) and hydroxyl radicals. At 5 mg/mL of the biosurfactant concentration, the scavenging of DPPH and hydroxyl radicals was found to be between 69.1-73.5% and 63.3-69.8%, respectively. The biosurfactants also displayed significant antibacterial activities against both Gram-positive and Gram-negative bacteria. The anti-adhesive activities of the biosurfactants were evaluated against Staphylococcus aureus ATCC 29523, Salmonella typhimurium ATCC 19430, and Bacillus cereus ATCC 11778. The biosurfactants exhibited anti-adhesive activity, even at concentrations of 3-5 mg/mL. Moreover, both biosurfactants displayed notable anti-biofilm activities with a biofilm eradication percentage ranging from 63.9 to 80.03% for VSG4 biosurfactant, and from 61.1-68.4% for VS16 biosurfactant. Furthermore, VSG4 biosurfactant exhibited emulsification and surface tension stability over a wide range of pH (4-10) and temperature up to 100 °C. These results show that VSG4 and VS16 biosurfactants can be potentially used as natural antioxidants, antimicrobials, and/or anti-adhesive agents for food and biomedical applications.
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Affiliation(s)
- S S Giri
- Laboratory of Aquatic Biomedicine, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, 08826, South Korea.
| | - E C Ryu
- Laboratory of Aquatic Biomedicine, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, 08826, South Korea.
| | - V Sukumaran
- Dept. of Zoology, Kundavai Nachiyar Government Arts College for Women (Autonomous), Thanjavur, 613007, Tamil Nadu, India.
| | - S C Park
- Laboratory of Aquatic Biomedicine, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, 08826, South Korea.
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Park SE, Yoon SS, Park SC, Kim EY. Analysis of Pre-transplant Resuscitation Factors Influencing Immediate Graft Function After Deceased Donor Kidney Transplantation. Transplant Proc 2018; 50:3088-3094. [PMID: 30577171 DOI: 10.1016/j.transproceed.2018.08.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Revised: 07/12/2018] [Accepted: 08/03/2018] [Indexed: 10/28/2022]
Abstract
BACKGROUND The management of a deceased donor in the intensive care unit before organ transplantation is important for the outcome of the recipient. Herein, we analyze the pre-transplant resuscitation factors managed before procurement that could influence graft function immediately after deceased-donor kidney transplantation (DDKT). METHODS A total of 271 DDKTs performed at Seoul St. Mary's Hospital, Korea, from January 2009 to March 2016 were reviewed. We divided the patients into a delayed graft function (DGF) group and a non-DGF group, and compared postoperative outcomes between the 2 groups. We also analyzed the predisposing factors of DGF using multivariate analysis. RESULTS A total of 36 cases developed DGF while 235 patients did not, and the demographic characteristics of the recipients in the two groups had no significant difference. Of the pre-transplant resuscitation factors, preoperative polyuria, the maximal levels of serum sodium and BUN, and transfer times were significantly higher in the DGF group (P < .001). In a multivariable analysis, preoperative polyuria (odds ratio 4.835, P = .036), elevated preoperative level of sodium (odds ratio 1.227, P = .001), and extended transfer times (odds ratio 1.001, P < .001) were the independent risk factors of the donor in pre-transplant resuscitation management associated with DGF. CONCLUSIONS Polyuria, high levels of sodium before procurement, and prolonged transfer times are independent risk factors for DGF after a DDKT. Active intervention and early implementation of the intensivist can help in managing these factors effectively and thus ultimately improve graft function.
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Affiliation(s)
- S E Park
- Department of Surgery, Seoul St. Mary's Hospital, The Catholic University of Korea College of Medicine, Seoul, Republic of Korea
| | - S S Yoon
- Department of Surgery, Seoul St. Mary's Hospital, The Catholic University of Korea College of Medicine, Seoul, Republic of Korea
| | - S C Park
- Department of Surgery, Seoul St. Mary's Hospital, The Catholic University of Korea College of Medicine, Seoul, Republic of Korea
| | - E Y Kim
- Department of Surgery, Seoul St. Mary's Hospital, The Catholic University of Korea College of Medicine, Seoul, Republic of Korea.
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Ko KJ, Kim YH, Kwon KH, Kim MH, Jun KW, Hwang JK, Kim SD, Park SC, Kim JI, Yun SS, Moon IS. Kidney Transplantation Using Expanded-Criteria Deceased Donors: A Comparison With Ideal Deceased Donors and Non-Expanded-Criteria Deceased Donors. Transplant Proc 2018; 50:3222-3227. [PMID: 30577189 DOI: 10.1016/j.transproceed.2018.05.028] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 05/09/2018] [Accepted: 05/23/2018] [Indexed: 12/31/2022]
Abstract
PURPOSE The use of expanded-criteria deceased-donor (ECD) kidneys must be evaluated within the objective perspective of critical organ shortage and graft function and survival. In this study, we aimed to compare the clinical outcomes of ECD reliance with concurrent use of ideal-criteria deceased donors (IDDs) and non-ECDs in adult renal transplantation. METHODS Between February 2000 and December 2015, we analyzed 405 deceased-donor renal transplants, specifically 129 grafts (31.9%) from ECDs, 233 grafts (57.5%) from non-ECDs, and 43 grafts (10.6%) from IDDs. ECDs were classified according to the United Network for Organ Sharing guidelines, while an IDD was defined as a younger person (10-39 years of age) with no medical risk factors who died from a traumatic head injury. Donor and recipient risk factors were separately analyzed and correlated with recipient graft function, and survival was evaluated. RESULTS ECDs were older (56.8 ± 6.3 years); showed increased incidence of hypertension, diabetes, and cerebrovascular brain death; and had a higher pre-retrieval serum creatinine level than the other groups. ECD kidney recipients were also older (50.6 ± 9.8 years), had a shorter waiting time (P = .031), and demonstrated a low frequency of re-transplantation (P = .028). Long-term renal function followed longitudinally was lower in ECD kidney recipients until five years after transplantation, while the glomerular filtration rate (GFR) level at 7 and 10 years did not differ significantly among the groups (P = .074 and .262, respectively). There were no significant differences in terms of graft survival (P = .394) or patient survival (P = .737) among the groups. CONCLUSIONS Although the long-term renal function followed longitudinally was lower in ECD kidney recipients, the use of renal grafts from ECDs is an acceptable method to resolve the disparity of critical organ shortage. However, the classification of the high-risk group should be updated with consideration given to differences in regional characteristics.
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Affiliation(s)
- K J Ko
- Department of Surgery, Seoul St. Mary's Hospital, Seoul, Republic of Korea
| | - Y H Kim
- Department of Surgery, Seoul St. Mary's Hospital, Seoul, Republic of Korea
| | - K H Kwon
- Department of Surgery, Seoul St. Mary's Hospital, Seoul, Republic of Korea
| | - M H Kim
- Department of Surgery, Seoul St. Mary's Hospital, Seoul, Republic of Korea
| | - K W Jun
- Department of Surgery, Bucheon St. Mary's Hospital, Gyeonggi, Republic of Korea
| | - J K Hwang
- Department of Surgery, Daejeon St. Mary's Hospital, Daejeon, Republic of Korea.
| | - S D Kim
- Department of Surgery, Incheon St. Mary's Hospital, Incheon, Republic of Korea
| | - S C Park
- Department of Surgery, Seoul St. Mary's Hospital, Seoul, Republic of Korea
| | - J I Kim
- Department of Surgery, Uijeongbu St. Mary's Hospital, Gyeonggi, Republic of Korea
| | - S S Yun
- Department of Surgery, Seoul St. Mary's Hospital, Seoul, Republic of Korea
| | - I S Moon
- Department of Surgery, Yeouido St. Mary's Hospital, The Catholic University of Korea, Seoul, Republic of Korea
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Kim SW, Jun JW, Giri SS, Chi C, Yun S, Kim HJ, Kim SG, Kang JW, Park SC. First report of carp oedema virus infection of koi (Cyprinus carpio haematopterus) in the Republic of Korea. Transbound Emerg Dis 2017; 65:315-320. [PMID: 29226602 DOI: 10.1111/tbed.12782] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2017] [Indexed: 11/29/2022]
Abstract
Twenty-five koi (Cyprinus carpio haematopterus) bought from a wholesale fish market in Korea, showed lethargic behaviour and 100% mortality within 20 days. Carp oedema virus (CEV) was detected by PCR in all 25 koi. Results of detailed histopathological and clinical examinations of 17 koi indicated loss of body balance, severe infiltration of inflammatory cells into the inter-lamellar spaces of the gills and vacuolization and inclusion bodies in gill epithelial cells. Sequence analysis of PCR products of these koi showed up to 99% identity to the previously reported sequences, suggesting that the observed mass mortality resulted from koi sleepy disease (KSD) due to CEV infection. To the best of our knowledge, this study is the first report of KSD in the Republic of Korea. Partial sequences of 4a protein from the virus indicated that the present CEV detected in koi from Korea is more closely related to that from the UK and Poland than from Japan. The present findings indicate that the prevalence and spread of KSD must be closely monitored in both European and Asian countries to avoid potential economic losses to the global koi industry.
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Affiliation(s)
- S W Kim
- Laboratory of Aquatic Biomedicine, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
| | - J W Jun
- Laboratory of Aquatic Biomedicine, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
| | - S S Giri
- Laboratory of Aquatic Biomedicine, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
| | - C Chi
- Laboratory of Aquatic Biomedicine, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
| | - S Yun
- Laboratory of Aquatic Biomedicine, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
| | - H J Kim
- Laboratory of Aquatic Biomedicine, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
| | - S G Kim
- Laboratory of Aquatic Biomedicine, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
| | - J W Kang
- Laboratory of Aquatic Biomedicine, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
| | - S C Park
- Laboratory of Aquatic Biomedicine, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
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Kim JS, Park CM, Choi JA, Park E, Tchoe HJ, Choi M, Suh JK, Kim YH, Won SH, Chung YC, Bae KY, Lee SK, Park SC, Lee SH. The association between season of birth, age at onset, and clozapine use in schizophrenia. Acta Psychiatr Scand 2017; 136:445-454. [PMID: 28741647 DOI: 10.1111/acps.12776] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [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] [Accepted: 07/03/2017] [Indexed: 12/19/2022]
Abstract
OBJECTIVE This study aimed to determine whether the rate of clozapine use, an indicator of refractoriness in schizophrenia, is associated with the season of birth and age at onset in patients with schizophrenia based on nationwide data. METHODS Patients with schizophrenia (n = 114 749) who received prescriptions for antipsychotic medication between 2008 and 2014 were retrospectively identified from the Korean National Health Insurance Service database. The study population was divided into three groups based on their age at the onset of schizophrenia (early, middle, and late onset). We assessed differences in the month of birth between patients and the general population. In addition, the cumulative clozapine use was calculated. RESULTS Compared to the late-onset schizophrenia group, the early- and middle-onset groups showed a higher probability of birth during the winter season. In addition, the early-onset group showed the highest cumulative clozapine use rate. In the middle-onset group, the initiation of clozapine use was significantly earlier for patients born in winter compared to those born in summer. CONCLUSION Our results indicate that the age at onset is an important factor in predicting the prognosis of schizophrenia patients. The season of birth also affects the prognosis, but with less robustness. Specifically, it appears that early disease onset and winter birth might be associated with poor outcomes in Korean patients with schizophrenia.
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Affiliation(s)
- J S Kim
- Clinical Emotion and Cognition Research Laboratory, Goyang, Korea.,Department of Psychiatry, Soonchunhyang University of College of Medicine, Cheonan, Korea
| | - C M Park
- National Evidence-based Healthcare Collaborating Agency, Seoul, Korea
| | - J A Choi
- National Evidence-based Healthcare Collaborating Agency, Seoul, Korea
| | - E Park
- National Evidence-based Healthcare Collaborating Agency, Seoul, Korea
| | - H J Tchoe
- National Evidence-based Healthcare Collaborating Agency, Seoul, Korea.,Pharmaceutical Policy & Outcomes Research, School of Pharmacy, Sungkyunkwan University, Sowon, Korea
| | - M Choi
- National Evidence-based Healthcare Collaborating Agency, Seoul, Korea
| | - J K Suh
- National Evidence-based Healthcare Collaborating Agency, Seoul, Korea
| | - Y H Kim
- Gong-ju National Hospital, Gongju, Korea
| | - S H Won
- Department of Psychiatry, Kyungpook National University School of Medicine, Daegu, Korea
| | - Y C Chung
- Department of Psychiatry, Chonbuk National University Hospital, Jeonju, Korea
| | - K Y Bae
- Department of Psychiatry, Chonnam National University Medical School, Gwangju, Korea
| | - S K Lee
- Department of Psychiatry, Hallym University Chuncheon Sacred Hospital, College of Medicine, Hallym University, Chuncheon, Korea
| | - S C Park
- Department of Psychiatry, Inje University Haeundae Paik Hospital, Busan, Korea
| | - S H Lee
- Clinical Emotion and Cognition Research Laboratory, Goyang, Korea.,Department of Psychiatry, Inje University Ilsan Paik Hospital, Goyang, Korea
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Le HT, Lee JW, Park SC, Jeong JW, Jung W, Lim CW, Kim KP, Kim TW. Triazolium cyclodextrin click cluster-resin conjugate: an enrichment material for phosphatidylinositol (3,4,5)-triphosphate. Chem Commun (Camb) 2017; 53:10459-10462. [PMID: 28890969 DOI: 10.1039/c7cc06151j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
UltraLink was functionalized with a triazolium cyclodextrin click cluster (CCC) which provides a well-oriented, multivalent, positively charged binding site for PtdIns(3,4,5)P3. MALDI TOF MS and LC ESI MS/MS MRM analysis of spiked PtdIns(3,4,5)P3 in lipid extract suggest that triazolium CCC-UltraLink conjugate can be used as an enrichment material for PtdIns(3,4,5)P3.
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Affiliation(s)
- H T Le
- Graduate School of East-West Medical Science, Kyung Hee University, Yongin, 17104, Republic of Korea.
| | - J W Lee
- Department of Applied Chemistry, College of Applied Science, Kyung Hee University, Yongin, 17104, Republic of Korea.
| | - S C Park
- Department of Applied Chemistry, College of Applied Science, Kyung Hee University, Yongin, 17104, Republic of Korea.
| | - J W Jeong
- Graduate School of East-West Medical Science, Kyung Hee University, Yongin, 17104, Republic of Korea.
| | - W Jung
- Department of Emergency Medicine, School of Medicine, Kyung Hee University, Seoul, 02447, Republic of Korea
| | - C W Lim
- Department of Chemistry, College of Life Science and Nano-technology, Hannam University, Daejeon, 34430, Republic of Korea
| | - K P Kim
- Department of Applied Chemistry, College of Applied Science, Kyung Hee University, Yongin, 17104, Republic of Korea.
| | - T W Kim
- Graduate School of East-West Medical Science, Kyung Hee University, Yongin, 17104, Republic of Korea.
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14
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Easwaran M, Dananjaya SHS, Park SC, Lee J, Shin HJ, De Zoysa M. Characterization of bacteriophage pAh-1 and its protective effects on experimental infection of Aeromonas hydrophila in Zebrafish (Danio rerio). J Fish Dis 2017; 40:841-846. [PMID: 27454188 DOI: 10.1111/jfd.12536] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2016] [Revised: 06/18/2016] [Accepted: 06/21/2016] [Indexed: 06/06/2023]
Affiliation(s)
- M Easwaran
- College of Veterinary Medicine and Research Institute of Veterinary Medicine, Chungnam National University, Daejeon, Korea
| | - S H S Dananjaya
- College of Veterinary Medicine and Research Institute of Veterinary Medicine, Chungnam National University, Daejeon, Korea
| | - S C Park
- College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
| | - J Lee
- Department of Marine Life Sciences, School of Marine Biomedical Sciences, Jeju National University, Jeju Self-Governing Province, Korea
- Fish Vaccine Research Center, Jeju National University, Jeju Self-Governing Province, Korea
| | - H-J Shin
- College of Veterinary Medicine and Research Institute of Veterinary Medicine, Chungnam National University, Daejeon, Korea
| | - M De Zoysa
- College of Veterinary Medicine and Research Institute of Veterinary Medicine, Chungnam National University, Daejeon, Korea
- Fish Vaccine Research Center, Jeju National University, Jeju Self-Governing Province, Korea
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15
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Lee SJ, Son YH, Lee KB, Lee JH, Kim HJ, Jeong EM, Park SC, Kim IG. 4-n-butylresorcinol enhances proteolytic degradation of tyrosinase in B16F10 melanoma cells. Int J Cosmet Sci 2016; 39:248-255. [PMID: 27666581 DOI: 10.1111/ics.12368] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Accepted: 09/22/2016] [Indexed: 12/20/2022]
Abstract
OBJECTIVE 4-n-butylresorcinol is a competitive inhibitor of tyrosinase and has been used as an antimelanogenic agent. However, its inhibition mechanism in intact cells is not fully understood. To elucidate the cellular mechanism, we compared in vitro and in vivo inhibitory effects of 4-n-butylresorcinol on tyrosinase activity. METHODS B16F10 melanoma cells were cultured in media containing α-MSH in the presence or absence of 4-n-butylresorcinol. Tyrosinase mRNA levels, protein levels and activity in B16F10 cells were compared by real-time PCR, immunostaining combined with western blot and colorimetric analysis, respectively. Melanin concentration was measured by colorimetry both in the cells and in the media. Tyrosinase glycosylation and proteolytic degradation were analysed by immunoblotting after cells were treated with Endo H/PNGase F and E64/proteasome inhibitors, respectively. RESULTS 4-n-butylresorcinol inhibited tyrosinase activity and melanin synthesis more effectively in intact cells than in cell lysates. Western blotting and real-time RT-PCR showed that 4-n-butylresorcinol reduced protein levels, but not mRNA levels, of tyrosinase in B16F10 cells. 4-n-butylresorcinol showed no effect on the processing of tyrosinase glycosylation or on trafficking to melanosomes. However, treatment of B16F10 cells with E64 or proteasome inhibitor abrogated the 4-n-butylresorcinol-induced decrease of tyrosinase. Moreover, 4-n-butylresorcinol activated p38 MAPK, resulting in increased ubiquitination of tyrosinase. CONCLUSION 4-n-butylresorcinol inhibits melanogenesis by enhancing proteolytic degradation of tyrosinase as well as competitive binding to tyrosinase. These findings will help to develop new, effective and safe chemicals for the treatment of hyperpigmentation disorders.
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Affiliation(s)
- S-J Lee
- Department of Biochemistry and Molecular Biology, Seoul National University College of Medicine, 103 Daehak-ro, Jongno-gu, Seoul, 110-799, South Korea
| | - Y H Son
- Department of Biochemistry and Molecular Biology, Seoul National University College of Medicine, 103 Daehak-ro, Jongno-gu, Seoul, 110-799, South Korea
| | - K B Lee
- Department of Biochemistry and Molecular Biology, Seoul National University College of Medicine, 103 Daehak-ro, Jongno-gu, Seoul, 110-799, South Korea
| | - J-H Lee
- Department of Biochemistry and Molecular Biology, Seoul National University College of Medicine, 103 Daehak-ro, Jongno-gu, Seoul, 110-799, South Korea
| | - H-J Kim
- Department of Biochemistry and Molecular Biology, Seoul National University College of Medicine, 103 Daehak-ro, Jongno-gu, Seoul, 110-799, South Korea
| | - E M Jeong
- Department of Biochemistry and Molecular Biology, Seoul National University College of Medicine, 103 Daehak-ro, Jongno-gu, Seoul, 110-799, South Korea.,Institute of Human-Environment Interface Biology, Biomedical Research Institute, Seoul National University Hospital, Daehak-ro 101, Jongno-gu, Seoul 110-799, South Korea
| | - S C Park
- Department of Biochemistry and Molecular Biology, Seoul National University College of Medicine, 103 Daehak-ro, Jongno-gu, Seoul, 110-799, South Korea
| | - I-G Kim
- Department of Biochemistry and Molecular Biology, Seoul National University College of Medicine, 103 Daehak-ro, Jongno-gu, Seoul, 110-799, South Korea.,Institute of Human-Environment Interface Biology, Biomedical Research Institute, Seoul National University Hospital, Daehak-ro 101, Jongno-gu, Seoul 110-799, South Korea
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16
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Nam MJ, Han KS, Kim BC, Hong CW, Sohn DK, Chang HJ, Kim MJ, Kim SY, Baek JY, Park SC, Oh JH. Long-term outcomes of locally or radically resected T1 colorectal cancer. Colorectal Dis 2016; 18:852-60. [PMID: 26589573 DOI: 10.1111/codi.13221] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Accepted: 10/08/2015] [Indexed: 12/11/2022]
Abstract
AIM Little is known about the long-term outcome of T1 colorectal cancer (CRC) following curative resection. The present study addressed the long-term outcome of locally or radically resected T1 CRCs. METHOD A total of 430 patients with T1 CRC who underwent local or radical resection were considered. Unfavourable histological factors were defined as positive resection margin, deep submucosal invasion, vascular invasion, Grade 3 and budding. The patients were classified as low-risk (unfavourable histological factor negative, n = 65) or high-risk (unfavourable histological factor positive, n = 365). RESULTS Over a median follow-up of 78.4 months, disease recurred in 16 (3.7%) patients in the high-risk group, and no recurrence in the low-risk group. Resection type and vascular invasion were significantly associated with recurrence. In the vascular invasion (+) high-risk group, both 5-year disease-free survival rate and 5-year overall survival rate were significantly associated with resection type (radical 94.6%, local 43.8%, P < 0.001, and radical 99.1%, local 66.7%, P < 0.001). In the vascular invasion (-) high-risk group, 5-year disease-free survival rate was also significantly associated with resection type (radical 98.9%, local 84.7%, P = 0.001). However, 5-year overall survival rate was not associated with resection type (radical 98.9%, local 95.2%, P = 0.816). CONCLUSION Local resection may be effective and oncologically safe in low-risk T1 CRC. Although additional surgery should be recommended for the locally resected high-risk T1 CRC cases, intensive surveillance without additional surgery and timely salvage operation may offer another treatment option, if vascular invasion is negative.
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Affiliation(s)
- M J Nam
- Center for Colorectal Cancer, Research Institute and Hospital, National Cancer Center, Goyang, Korea
| | - K S Han
- Center for Colorectal Cancer, Research Institute and Hospital, National Cancer Center, Goyang, Korea.,Center for Cancer Prevention and Early Detection, Research Institute and Hospital, National Cancer Center, Goyang, Korea
| | - B C Kim
- Center for Colorectal Cancer, Research Institute and Hospital, National Cancer Center, Goyang, Korea.,Center for Cancer Prevention and Early Detection, Research Institute and Hospital, National Cancer Center, Goyang, Korea
| | - C W Hong
- Center for Colorectal Cancer, Research Institute and Hospital, National Cancer Center, Goyang, Korea.,Center for Cancer Prevention and Early Detection, Research Institute and Hospital, National Cancer Center, Goyang, Korea
| | - D K Sohn
- Center for Colorectal Cancer, Research Institute and Hospital, National Cancer Center, Goyang, Korea.,Center for Cancer Prevention and Early Detection, Research Institute and Hospital, National Cancer Center, Goyang, Korea
| | - H J Chang
- Center for Colorectal Cancer, Research Institute and Hospital, National Cancer Center, Goyang, Korea
| | - M J Kim
- Center for Colorectal Cancer, Research Institute and Hospital, National Cancer Center, Goyang, Korea
| | - S Y Kim
- Center for Colorectal Cancer, Research Institute and Hospital, National Cancer Center, Goyang, Korea
| | - J Y Baek
- Center for Colorectal Cancer, Research Institute and Hospital, National Cancer Center, Goyang, Korea
| | - S C Park
- Center for Colorectal Cancer, Research Institute and Hospital, National Cancer Center, Goyang, Korea
| | - J H Oh
- Center for Colorectal Cancer, Research Institute and Hospital, National Cancer Center, Goyang, Korea
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17
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Lee JH, Park SH, Lim JH, Park YJ, Kim SU, Lee KH, Kim KH, Park SC, Jung HY, Kwon O, Choi JY, Cho JH, Kim CD, Kim YL. Impact of dialysis modality on technique survival in end-stage renal disease patients. Korean J Intern Med 2016; 31:106-15. [PMID: 26767864 PMCID: PMC4712414 DOI: 10.3904/kjim.2016.31.1.106] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2014] [Revised: 08/12/2014] [Accepted: 08/19/2014] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND/AIMS This study analyzed the risk factors for technique survival in dialysis patients and compared technique survival rates between hemodialysis (HD) and peritoneal dialysis (PD) in a prospective cohort of Korean patients. METHODS A total of 1,042 patients undergoing dialysis from September 2008 to June 2011 were analyzed. The dialysis modality was defined as that used 90 days after commencing dialysis. Technique survival was compared between the two dialysis modalities, and the predictive risk factors were evaluated. RESULTS The dialysis modality was an independent risk factor predictive of technique survival. PD had a higher risk for technique failure than HD (hazard ratio [HR], 10.8; 95% confidence interval [CI], 1.9 to 62.0; p = 0.008) during a median follow-up of 11.0 months. In the PD group, a high body mass index (BMI) was an independent risk factor for technique failure (HR, 1.3; 95% CI, 1.0 to 1.8; p = 0.036). Peritonitis was the most common cause of PD technique failure. The difference in technique survival between PD and HD was more prominent in diabetic patients with a good nutritional status and in non-diabetic patients with a poor nutritional status. CONCLUSIONS In a prospective cohort of Korean patients with end-stage renal disease, PD was associated with a higher risk of technique failure than HD. Diabetic patients with a good nutritional status and non-diabetic patients with a poor nutritional status, as well as patients with a higher BMI, had an inferior technique survival rate with PD compared to HD.
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Affiliation(s)
- Jong-Hak Lee
- Clinical Research Center for End Stage Renal Disease in Korea, Daegu, Korea
- Division of Nephrology, Department of Internal Medicine, Kyungpook National University School of Medicine, Daegu, Korea
| | - Sun-Hee Park
- Clinical Research Center for End Stage Renal Disease in Korea, Daegu, Korea
- Division of Nephrology, Department of Internal Medicine, Kyungpook National University School of Medicine, Daegu, Korea
| | - Jeong-Hoon Lim
- Clinical Research Center for End Stage Renal Disease in Korea, Daegu, Korea
- Division of Nephrology, Department of Internal Medicine, Kyungpook National University School of Medicine, Daegu, Korea
| | - Young-Jae Park
- Clinical Research Center for End Stage Renal Disease in Korea, Daegu, Korea
- Division of Nephrology, Department of Internal Medicine, Kyungpook National University School of Medicine, Daegu, Korea
| | - Sang Un Kim
- Clinical Research Center for End Stage Renal Disease in Korea, Daegu, Korea
- Division of Nephrology, Department of Internal Medicine, Kyungpook National University School of Medicine, Daegu, Korea
| | - Kyung-Hee Lee
- Clinical Research Center for End Stage Renal Disease in Korea, Daegu, Korea
- Division of Nephrology, Department of Internal Medicine, Kyungpook National University School of Medicine, Daegu, Korea
| | - Kyung-Hoon Kim
- Clinical Research Center for End Stage Renal Disease in Korea, Daegu, Korea
- Division of Nephrology, Department of Internal Medicine, Kyungpook National University School of Medicine, Daegu, Korea
| | - Seung Chan Park
- Clinical Research Center for End Stage Renal Disease in Korea, Daegu, Korea
- Division of Nephrology, Department of Internal Medicine, Kyungpook National University School of Medicine, Daegu, Korea
| | - Hee-Yeon Jung
- Clinical Research Center for End Stage Renal Disease in Korea, Daegu, Korea
- Division of Nephrology, Department of Internal Medicine, Kyungpook National University School of Medicine, Daegu, Korea
| | - Owen Kwon
- Clinical Research Center for End Stage Renal Disease in Korea, Daegu, Korea
- Division of Nephrology, Department of Internal Medicine, Kyungpook National University School of Medicine, Daegu, Korea
| | - Ji-Young Choi
- Clinical Research Center for End Stage Renal Disease in Korea, Daegu, Korea
- Division of Nephrology, Department of Internal Medicine, Kyungpook National University School of Medicine, Daegu, Korea
| | - Jang-Hee Cho
- Clinical Research Center for End Stage Renal Disease in Korea, Daegu, Korea
- Division of Nephrology, Department of Internal Medicine, Kyungpook National University School of Medicine, Daegu, Korea
| | - Chan-Duck Kim
- Clinical Research Center for End Stage Renal Disease in Korea, Daegu, Korea
- Division of Nephrology, Department of Internal Medicine, Kyungpook National University School of Medicine, Daegu, Korea
| | - Yong-Lim Kim
- Clinical Research Center for End Stage Renal Disease in Korea, Daegu, Korea
- Division of Nephrology, Department of Internal Medicine, Kyungpook National University School of Medicine, Daegu, Korea
- Correspondence to Yong-Lim Kim, M.D. Department of Internal Medicine, Kyungpook National University School of Medicine, 680 Gukchaebosang-ro, Jung-gu, Daegu 41944, Korea Tel: +82-53-420-5553 Fax: +82-53-423-7583 E-mail:
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18
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Kim HJ, Park JK, Park SC, Kim YG, Choi H, Ko JI, Kim MK, Jeong YB, Shin YS. The prevalence of causative organisms of community-acquired urethritis in an age group at high risk for sexually transmitted infections in Korean Soldiers. J ROY ARMY MED CORPS 2015; 163:20-22. [PMID: 26607860 DOI: 10.1136/jramc-2015-000488] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Accepted: 09/24/2015] [Indexed: 11/03/2022]
Abstract
OBJECTIVES This study was designed to evaluate the causative organisms in young male soldiers with clinical signs and symptoms after sexual contact that suggests a diagnosis of urethritis. METHODS Between June 2012 and January 2015, male patients with urethritis symptoms that had resulted from sexual contact within 3 months participated in this study. All patients were evaluated using urinalysis and were screened for Neisseria gonorrhoeae (NG), Chlamydia trachomatis (CT), Ureaplasma urealyticum (UU), Mycoplasma genitalium (MG), Mycoplasma hominis (MH), herpes simplex virus (HSV) type II and Trichomonas vaginalis (TV) using multiplex PCR (mPCR) assay in order to detect sexually transmitted infections (STI) or pathogens. RESULTS A total of 436 male patients aged 18-28 years were included in the study. The median age was 22.0 years. The prevalence of STI pathogens were as follows: NG in 19.0%, CT in 36.6%, UU in 24.0%, MG in 21.5%, MH in 6.1%, HSV type II in 1.6%, TV in 0.2% and indeterminate STI pathogens in 9.4%. Coinfection of NG with non-NG was detected in 5.7% of the participants, while the coinfection rates for STI pathogens were: with CT in 3.4%, with UU in 2.7%, with MG in 0.2% and with MH in 0.2%. CONCLUSIONS CT was the most prevalent STI pathogen and coinfections of NG with non-NG appeared less frequently. The young male soldiers with urethritis should be administered suitable antibiotics for STI pathogens that were found by mPCR results, rather than an experimental combination of antibiotics for coinfections.
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Affiliation(s)
- Hyung Jin Kim
- Department of Urology, Chonbuk National University Medical School, Jeonju, Korea
| | - J K Park
- Department of Urology, Chonbuk National University Medical School, Jeonju, Korea
| | - S C Park
- Department of Urology, Wonkwang University School of Medicine, Institute of Wonkwang Medical Science, Iksan, Korea
| | - Y G Kim
- Department of Urology, Chonbuk National University Medical School, Jeonju, Korea
| | - H Choi
- Department of Urology, Armed Forces Capital Hospital, Seongnam, Korea
| | - J I Ko
- Department of Urology, Armed Forces Capital Hospital, Seongnam, Korea
| | - M K Kim
- Department of Urology, Chonbuk National University Medical School, Jeonju, Korea
| | - Y B Jeong
- Department of Urology, Chonbuk National University Medical School, Jeonju, Korea
| | - Y S Shin
- Department of Urology, Chonbuk National University Medical School, Jeonju, Korea.,Department of Urology, Armed Forces Capital Hospital, Seongnam, Korea
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Hwang JK, Kim JM, Kim YK, Kim SD, Park SC, Kim JI, Nam HW, Kim J, Moon IS. The early protective effect of glutamine pretreatment and ischemia preconditioning in renal ischemia-reperfusion injury of rat. Transplant Proc 2014; 45:3203-8. [PMID: 24182785 DOI: 10.1016/j.transproceed.2013.08.028] [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] [Subscribe] [Scholar Register] [Received: 09/21/2012] [Revised: 07/13/2013] [Accepted: 08/16/2013] [Indexed: 11/20/2022]
Abstract
BACKGROUND Heat shock proteins (HSP) play an important role in protecting cells against stress. METHODS Using a rat model, we tested the hypothesis that pretreatment with glutamine (Gln) and ischemia preconditioning (IPC) increase the expression of HSP resulting in attenuation of renal ischemia/reperfusion (I/R) injury. Sprague-Dawley rats were randomized into 4 groups [group I, Gln injection (+), IPC (+); group II, Gln injection (+), IPC (-); group III, saline injection (+), IPC (+); group IV, saline injection (+), IPC (-)]. Renal HSP70 expression was determined by Western blotting and kidney function was assessed by blood urea nitrogen and serum creatinine. Renal cross-sections were microscopically examined for tubular necrosis, exfoliation of tubular epithelial cells, cast formation, and monocyte infiltration. RESULTS Gln pretreatment increased intrarenal HSP expression (P = .031). In group I, tubulointerstitial abnormalities were clearly slighter compared with the other groups (P < .001). CONCLUSION Our experiments suggest that (1) a single dose of Gln could induce HSP expression and (2) IPC could relieve renal I/R injury. In addition, IPC combined with Gln pretreatment had a synergic protective effect against renal I/R injury.
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Affiliation(s)
- J K Hwang
- Department of Surgery, College of Medicine, The Catholic University of Korea, Seoul, Korea
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20
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Hwang JK, Chun HJ, Kim JM, Kwon KH, Kim YK, Kim SD, Park SC, Choi BS, Kim JI, Yang CW, Kim YS, Moon IS. Contrast-enhanced magnetic resonance angiography in the early period after kidney transplantation. Transplant Proc 2014; 45:2925-30. [PMID: 24157005 DOI: 10.1016/j.transproceed.2013.08.039] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Our objective was to evaluate the usefulness of three-dimensional (3-D) contrast-enhanced (CE) magnetic resonance angiography (MRA) to assess renal parenchyma, arterial inflow stenosis, and peritransplant fluid collections in the early period after kidney transplantation (KT). Between January 2010 and April 2011, we examined a consecutive series of 144 renal transplants using 3-D CE MRA at 14 days after KT. MRA showed parenchyma infarctions (n = 17, 11.8%), arterial inflow stenoses (n = 23, 16%), lymphoceles (n = 14, 9.7%), and hematomas (n = 6, 4.2%). The degree of renal transplant artery inflow stenosis was graded qualitatively based on diameter criterion; <50% = mild, 50% to 70% = moderate, and >70% = severe in 10 (6.9%), 5 (3.5%), and 8 (5.6%) subjects, respectively. The study recipients were divided into 3 groups according to the degree of renal artery inflow stenosis (group I: normal; group II: mild and moderate, <70%; group III: severe, >70%). Among group III patients who underwent digital subtraction angiography, 5 had percutaneous transluminal angioplasty or stenting performed after 1 month. Their mean resume creatinine levels at 1, 6, and 12 months after transplantation were not significantly different from those in the other groups (P = .391, .447, .110). The prevalence of graft loss (n = 2) was high in group III (P = .012), although the frequency of acute rejection episodes was not different among the groups (P = .890). The incidences of renal parenchyma infarction, peritransplant fluid collection and arterial inflow stenosis were unexpectedly high in the early period after KT. Thus, 3-D CE MRA provided a rapid global assessment of the renal parenchyma, transplant arterial system, and peritransplant fluid collection that can be helpful to detect or exclude many causes of renal transplant dysfunction.
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Affiliation(s)
- J K Hwang
- Division of Transplantation Surgery, Department of Surgery, College of Medicine, The Catholic University of Korea, Seoul, Korea
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21
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Kim MH, Park KM, Hwang JK, Park SC, Moon IS, Kim JI. The natural history of arteriovenous access and risk factors associated with access thrombosis after successful kidney transplantation. Transplant Proc 2014; 46:602-6. [PMID: 24656023 DOI: 10.1016/j.transproceed.2013.10.056] [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] [Received: 09/21/2013] [Accepted: 10/01/2013] [Indexed: 10/25/2022]
Abstract
INTRODUCTION The purpose of this study was to determine the natural history of arteriovenous (AV) access after successful kidney transplantation (KT) and to identify the risk factors of spontaneous access closure in kidney transplant recipients. METHODS We performed a retrospective review of 115 patients who underwent KT with functioning access from June 2010 to July 2012. AV access patency was checked and recorded daily during the hospital stay and at every visit to the outpatient clinic. Patients were divided into 2 groups according to the patency of access, and risk factors of access thrombosis were assessed. Access patency was followed up until patency was lost or the study was closed. RESULTS At the end of follow-up, 18 (15.7%) AV accesses had spontaneously closed. Mean time to closure was 119 ± 163 days, and 12 of 18 were closed within 90 days after KT. AV access spontaneously closed in 8.5% of male patients, compared with 27.3% of female patients (P = .007), 12.2% of cases with native access compared with 35.3% of cases with artificial access (P = .016), and 11.3% of cases with wrist access compared with 25.7% of cases with elbow access (P = .049). Spontaneously closed AV accesses tended to have a lower mean access flow compared with functioning accesses (P = .019). On multivariate analysis, female sex and AV access flow volume affected spontaneous AV access closure (odds ratio 4.749, 95% confidence interval 1.919-35.383, P = .008; odds ratio 0.998, 95% confidence interval 0.996-0.999, P = .010, respectively). CONCLUSIONS Our results suggest that AV access thrombosis occurs more frequently during the early postoperative period, particularly in female patients or patients with low flow access, whereas it is a rare event in male patients or patients with high access flow, especially in the late postoperative period.
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Affiliation(s)
- M H Kim
- Department of Surgery, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - K M Park
- Department of Surgery, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - J K Hwang
- Department of Surgery, Daejeon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Daejeon, Korea
| | - S C Park
- Department of Surgery, Uijeongbu St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Uijeongbu, Korea
| | - I S Moon
- Department of Surgery, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - J I Kim
- Department of Surgery, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
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Jung HY, Kim KH, Park SC, Choi JY, Park SH, Kim CD, Kim YL, Cho JH. Recovery of renal function after acute kidney injury requiring continuous renal replacement therapy. Crit Care 2014. [PMCID: PMC4069587 DOI: 10.1186/cc13579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Park SC, Kim EY, Kang YA, Park MS, Kim YS, Kim SK, Chang J, Jung JY. Validation of a scoring tool to predict drug-resistant pathogens in hospitalised pneumonia patients. Int J Tuberc Lung Dis 2013; 17:704-9. [PMID: 23575340 DOI: 10.5588/ijtld.12.0723] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [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 Health care-associated pneumonia (HCAP) affects a heterogeneous group of patients in frequent contact with health care systems. However, HCAP criteria poorly predict infection with drug-resistant (DR) pathogens. OBJECTIVE To validate our previously reported risk-scoring model (predictive of DR pathogen infection) in patients admitted to hospital with pneumonia. DESIGN We evaluated 580 patients admitted with culture-positive bacterial pneumonia. We identified risk factors, evaluated the risk-scoring model's capacity to predict infection by DR pathogens and compared the model's diagnostic accuracy with that of current HCAP criteria. RESULTS DR pathogens were observed in 227/580 patients (39.1%). Of 269 HCAP patients, 153 (56.9%) were infected with DR pathogens. Overtreatment was more common in HCAP than in community-acquired pneumonia (58.7% vs. 41.2%, P < 0.001). Recent hospitalisation, admission from a long-term care facility, recent antibiotic treatment and tube feeding were independently associated with DR pathogens. For pathogen prediction, the risk-scoring model showed better diagnostic accuracy than HCAP criteria (area under receiver operating-characteristic curve = 0.723 vs. 0.673, P < 0.001). CONCLUSION According to current HCAP criteria, half of the HCAP patients were treated unnecessarily with broad-spectrum antibiotics. Risk scoring by stratifying risk factors could improve the identification of patients likely to be infected with DR pathogens.
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Affiliation(s)
- S C Park
- Division of Pulmonology, Department of Internal Medicine, Severance Hospital, Institute of Chest Disease, Yonsei University College of Medicine, Seoul, Republic of Korea
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Kim JH, Son JS, Choi YJ, Choresca CH, Shin SP, Han JE, Jun JW, Kang DH, Oh C, Heo SJ, Park SC. Isolation and characterization of a lytic Myoviridae bacteriophage PAS-1 with broad infectivity in Aeromonas salmonicida. Curr Microbiol 2012; 64:418-26. [PMID: 22314935 DOI: 10.1007/s00284-012-0091-x] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [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: 11/24/2011] [Accepted: 01/18/2012] [Indexed: 10/14/2022]
Abstract
To search for candidate control agents against Aeromonas salmonicida subsp. salmonicida infections in aquaculture, one bacteriophage (phage), designated as PAS-1, was isolated from the sediment samples of the rainbow trout (Oncorhynchus mykiss) culture farm in Korea. The PAS-1 was morphologically classified as Myoviridae and possessed approximately 48 kb of double-strand genomic DNA. The phage showed broad host ranges to other subspecies of A. salmonicida as well as A. salmonicida subsp. salmonicida including antibiotic-resistant strains. Its latent period and burst size were estimated to be approximately 40 min and 116.7 PFU/cell, respectively. Furthermore, genomic and structural proteomic analysis of PAS-1 revealed that the phage was closely related to other Myoviridae phages infecting enterobacteria or Aeromonas species. The bacteriolytic activity of phage PAS-1 was evaluated using three subspecies of A. salmonicida strain at different doses of multiplicity of infection, and the results proved to be efficient for the reduction of bacterial growth. Based on these results, PAS-1 could be considered as a novel Aeromonas phage and might have potentiality to reduce the impacts of A. salmonicida infections in aquaculture.
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Affiliation(s)
- J H Kim
- Laboratory of Aquatic Animal Medicine, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul 151-742, Republic of Korea
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Suh JH, Han KS, Kim BC, Hong CW, Sohn DK, Chang HJ, Kim MJ, Park SC, Park JW, Choi HS, Oh JH. Predictors for lymph node metastasis in T1 colorectal cancer. Endoscopy 2012; 44:590-5. [PMID: 22638780 DOI: 10.1055/s-0031-1291665] [Citation(s) in RCA: 79] [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: 12/10/2022]
Abstract
BACKGROUND AND STUDY AIMS It is critical that the risk of lymph node metastasis (LNM) is evaluated for determining the suitability of endoscopic resection for T1 colorectal cancer (CRC). Reported risk factors for LNM in completely resected T1 CRC are deep submucosal invasion, grade 3, angiolymphatic invasion, and budding. The aim of the present study was to identify the histopathologic factors associated with LNM in T1 CRC. PATIENTS AND METHODS The study involved 435 patients with T1 CRC treated by endoscopic or surgical resection between January 2001 and April 2010 at the National Cancer Center, Korea. The 435 patients were classified into two groups - those undergoing surgical resection (n = 324) and those undergoing endoscopic resection (n = 111). In the surgically resected group, details regarding depth of submucosal invasion, angiolymphatic invasion, tumor grade, budding, and background adenoma (BGA) were evaluated with respect to presence or absence of LNM. In the endoscopically resected group, the results of follow-ups and additional salvage surgeries were studied. RESULTS In the surgically resected group, LNM was detected in 42 patients (13.0 %). Grade 3, angiolymphatic invasion, budding, and the absence of BGA were identified as factors associated with LNM in univariate and multivariate analyses (P < 0.05). Among the 50 patients in the endoscopically resected group with high risk, three were diagnosed as being LNM-positive during the follow-up period. There was no LNM in the endoscopically resected group with low risk. CONCLUSIONS Grade 3, angiolymphatic invasion, budding, and the absence of BGA are the risk factors that predict LNM in patients with T1 CRC. In cases where endoscopically resected T1 CRC has no risk factor, cautious follow-up could be recommended. However, if the tumor has any risk factor, additional surgical resection should be considered.
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Affiliation(s)
- J H Suh
- Center for Colorectal Cancer, Research Institute and Hospital, National Cancer Center, Goyang, Korea
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Hwang JK, Kim YK, Kim SD, Park SC, Choi BS, Kim JI, Yang CW, Kim YS, Moon IS. Does donor kidney to recipient body weight ratio influence long-term outcomes of living-donor kidney transplantation? Transplant Proc 2012; 44:276-80. [PMID: 22310632 DOI: 10.1016/j.transproceed.2011.12.005] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
This study evaluated the effect of the donor kidney to recipient body weight (Kw/Rw) ratio on long-term graft function and survival. We investigated retrospectively whether there was any association between Kw/Rw ratio and long-term graft survival and function after a follow-up of >10 years. We studied a consecutive series of 123 adult-to-adult living kidney transplants. According to the Kw/Rw ratio, patients were divided into 3 groups: "low" (Kw/Rw <2.85; n = 29), "medium" (2.85 ≤ Kw/Rw < 4.04; n = 63), and "high" (≥4.04; n = 31). Among the 3 groups, the mean serum creatinine levels at 1 and 6 months as well as 1 year after transplantation were significantly lower among patients with a high Kw/Rw ratio than in those with a medium or low ratio, but serum creatinine levels at 3 and 5 years did not differ significantly (P = .394 and 0.620, respectively). Graft survival rates at 5 and 10 years after transplantation were significantly lower in the "low" group. We observed a significant association between Kw/Rw ratio and graft survival (P = .018). The Kw/Rw ratio is an important factor for long-term graft survival and early graft function. However, it did not significantly affect subsequent renal function.
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Affiliation(s)
- J K Hwang
- Division of Transplantation Surgery, Department of Surgery, College of Medicine, Catholic University of Korea, Seoul, Korea
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Lee SD, Kim TH, Kim DY, Baek JY, Kim SY, Chang HJ, Park SC, Park JW, Oh JH, Jung KH. Lymph node ratio is an independent prognostic factor in patients with rectal cancer treated with preoperative chemoradiotherapy and curative resection. Eur J Surg Oncol 2012; 38:478-83. [PMID: 22465588 DOI: 10.1016/j.ejso.2012.03.002] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2011] [Revised: 02/26/2012] [Accepted: 03/05/2012] [Indexed: 01/04/2023] Open
Abstract
PURPOSE To evaluate the prognostic effect of lymph node ratio (LNR) in patients with locally advanced rectal cancer who were treated with curative resection after preoperative chemoradiotherapy (CRT). METHODS Between October 2001 and December 2007, 519 patients who had undergone curative resection of primary rectal cancer after preoperative CRT were enrolled. Of these, 154 patients were positive for lymph node (LN) metastasis and were divided into three groups according to the LNR (≤ 0.15 [n=80], 0.16-0.3 [n=44], >0.3 [n=30]) to evaluate the prognostic effect on overall survival (OS) and disease-free survival (DFS). RESULTS LNR (≤ 0.15, 0.16-0.3, and >0.3) was significantly associated with 5-year OS (90.3%, 75.1%, and 45.1%; p<0.001) and DFS (66.7%, 55.8%, and 21.9%; p<0.001) rates. In a multivariate analysis, LNR (≤ 0.15, 0.16-0.3, and >0.3) was a significant independent prognostic factor for OS (hazard ratios [HRs], 1, 3.609, and 8.197; p<0.001) and DFS (HRs, 1, 1.699, and 3.960; p<0.001). LNR had a prognostic impact on OS and DFS in patients with <12 harvested LNs, as well as in those with ≥ 12 harvested LNs (p<0.05). CONCLUSION LNR was a significant independent prognostic predictor for OS and DFS in patients with locally advanced rectal cancer who were treated with curative resection after preoperative CRT.
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Affiliation(s)
- S D Lee
- Center for Colorectal Cancer, National Cancer Center, Goyang, Republic of Korea
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Kim HS, Ahn CH, Park TS, Park HD, Koh KS, Ryoo ZY, Park SC, Lee S. Gene expression profiling of a cold-shocked earthworm Eisenia andrei. Cryo Letters 2012; 33:1-11. [PMID: 22434117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
To identify genes that are modulated under cold-stress conditions in the earthworm Eisenia andrei, we performed a genome-wide analysis of gene expression in cold-shocked earthworms by using Serial Analysis of Gene Expression (SAGE). We identified 5,977 and 5,407 unique SAGE tags under normal and cold-stressed conditions, respectively. The majority of the SAGE tags did not match to any known expressed sequences, due to a paucity of expression data in earthworms. We converted the statistically significant SAGE tags for the cold-stressed condition into expressed sequence tags (ESTs), and the results showed that particular genes associated with energy homeostasis, cellular defense mechanisms, and ion balance were up-regulated or down-regulated. We constructed a regulatory network of some of these genes and identified rps-6 as a core gene in the cold-response regulatory-gene network. Our data provide a baseline for gene expression studies of cold shock in the Lumbricidae.
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Affiliation(s)
- H S Kim
- School of Life Science and Biotechnology, Kyungpook National University, Seoul, Republic of Korea
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Kim JH, Kim HK, Nguyen VG, Park BK, Choresca CH, Shin SP, Han JE, Jun JW, Park SC. Genomic sequence of infectious hypodermal and hematopoietic necrosis virus (IHHNV) KLV-2010-01 originating from the first Korean outbreak in cultured Litopenaeus vannamei. Arch Virol 2011; 157:369-73. [PMID: 22038073 DOI: 10.1007/s00705-011-1155-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2011] [Accepted: 10/17/2011] [Indexed: 11/25/2022]
Abstract
Due to the need to track and monitor genetic diversity, the genome of the infectious hypodermal and hematopoietic necrosis virus (IHHNV) strain KLV-2010-01 in cultured Litopenaeus vannamei shrimp that originated from the first Korean outbreak in 2010 was sequenced and analyzed. The genome, with a length of 3914 nucleotides, was sequenced from the Korean IHHNV. The genome encoded three large and overlapping open reading frames: ORF1 (NS-1) of 2001 bp, ORF2 (NS-2) of 1092 bp and ORF3 (capsid protein) of 990 bp. The overall organization, size and predicted amino acid sequence of the three ORFs in Korean IHHNV were highly similar to those of members of the infectious IHHNV group, and the most closely related strains were IHHNVs described from Ecuador and Hawaii. Additionally, phylogenetic analysis showed that the Korean IHHNV was clustered with lineage III in the infectious IHHNV group and was most similar to IHHNV isolates from Ecuador, China and Taiwan.
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Affiliation(s)
- J H Kim
- Laboratory of Aquatic Animal Medicine, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul 151-742, Republic of Korea
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Han SY, Kang BK, Kang BJ, Shin SP, Soen BH, Kim JM, Kim JH, Choresca CH, Han JE, Jun JW, Park SC. Prevalence and different characteristics of two serotypes of Streptococcus parauberis isolated from the farmed olive flounder, Paralichthys olivaceus (Temminck and Schlegel), in Korea. J Fish Dis 2011; 34:731-739. [PMID: 21916898 DOI: 10.1111/j.1365-2761.2011.01289.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] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The prevalence of two serotypes of Streptococcus parauberis isolated from the olive flounder, Paralichthys olivaceus, was evaluated in a total of 29 isolates between 2003 and 2010 in Korea. Streptococcus parauberis isolates were divided into two serologically distinct types (serotype 1 and serotype 2), except for one strain (S1091), using an agglutination assay with rabbit antiserum, and serotype 1 was identified as the dominant type (24 of 29 isolates) in this study. To identify the characteristics of the two serotypes of S. parauberis, we conducted a biochemical test using the API 20 Strep kit, a transmission electron microscopy (TEM) assay, sequence analysis of 16S-23S rRNA intergenic spacer region (ISR) and a pathogenicity test. In TEM, both serotypes possessed polysaccharide capsule layers around the cell surface when bacterial cells were treated with a homologous serotype of rabbit antiserum. However, we were unable to discriminate serotype-specific biochemical characteristics and genetic characteristics of 16S-23S rRNA ISR between the two serotypes. In the pathogenicity test, the serotype 1 strains induced significantly higher mortality than the serotype 2 strains in olive flounder when experimentally inoculated via the intraperitoneal route.
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Affiliation(s)
- S Y Han
- Research Unit, Green Cross Veterinary Product, Yongin, Korea
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Choresca CH, Koo OJ, Hong SG, Oh HJ, Gomez DK, Kim JH, Lee BC, Park SC. Effect of dimethyl sulfoxide on cell cycle synchronization of goldfish caudal fin derived fibroblasts cells. Reprod Domest Anim 2011; 45:e73-7. [PMID: 19788515 DOI: 10.1111/j.1439-0531.2009.01525.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Several studies have previously been conducted regarding cell cycle synchronization in mammalian somatic cells. However, limited work has been performed on the control of cell cycle stages in the somatic cells of fish. The aim of this study was to determine the cell cycle arresting effects of several dimethyl sulfoxide (DMSO) concentrations for different times on different cell cycle stages of goldfish caudal fin-derived fibroblasts. Results demonstrated that the cycling cells or control group (68.29%) yields significantly higher (p < 0.05) arrest in G0/G1 phase compared with the group treated for 24 h with different concentrations (0.5%, 1.0% or 1.5%) of DMSO (64.88%, 65.70%, 64.22% respectively). The cell cycle synchronization in the treatment of cells with 1.0% DMSO at 48 h (81.14%) was significantly higher than that in the groups treated for 24 h (76.82%) and the control group (77.90%). Observations showed that treatment of DMSO resulted in an increase in the proportion of cells at G0/G1 phase for 48 h of culture. However, high levels of apoptotic cells can be detected after 48 h of culture treated with 1% concentration of DMSO.
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Affiliation(s)
- C H Choresca
- Laboratory of Aquatic Animal Medicine, Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Seoul National University, Seoul Brain Korea 21 Program for Veterinary Science, Seoul National University, Seoul, South Korea
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Choi JG, Kang OH, Lee YS, Oh YC, Chae HS, Obiang-Obounou B, Park SC, Shin DW, Hwang BY, Kwon DY. Antimicrobial activity of the constituents of Smallanthus sonchifolius leaves against methicillin-resistant Staphylococcus aureus. Eur Rev Med Pharmacol Sci 2010; 14:1005-1009. [PMID: 21375130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
BACKGROUND AND OBJECTIVES Methicillin-resistant Staphylococcus aureus (MRSA) has been a serious problem as its infection is associated with higher mortality and increase cost worldwide. In the present study, the antibacterial activity of enhydrin, polymatin B, allo-schkuhriolide from the leaves of Smallanthus sonchifolius was investigated. MATERIAL AND METHODS Enhydrin, polymatin B, allo-schkuhriolide from the leaves of Smallanthus sonchifolius were tested for antimicrobial activity using micro dilution broth method against 2 strains of ATCC 33591, ATCC 25923 and 15 strains of clinical isolates MRSA. RESULTS The antibacterial activity of Smallanthus sonchifolius can safely be attributed to enhydrin as polymatin B, and allo-schkuhriolide are not showing any activity against Staphylococcus aureus strains. The enhydrin showed good antibacterial activity against all tested strains (MIC = 125-500 microg/ml). DISCUSSION These results suggest that only enhydrin can be considered as an antibacterial drug against MRSA.
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Affiliation(s)
- J G Choi
- Department of Oriental Pharmacy, College of Pharmacy, Wonkwang University, Jeonbuk, Republic of Korea
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Gebru E, Lee JS, Son JC, Yang SY, Shin SA, Kim B, Kim MK, Park SC. Effect of probiotic-, bacteriophage-, or organic acid-supplemented feeds or fermented soybean meal on the growth performance, acute-phase response, and bacterial shedding of grower pigs challenged with Salmonella enterica serotype Typhimurium. J Anim Sci 2010; 88:3880-6. [PMID: 20729283 DOI: 10.2527/jas.2010-2939] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
A 28-d experiment evaluated the growth performance, acute-phase response, and bacterial shedding patterns in pigs (n = 108; initially, 38.7 ± 6.7 kg) fed 6 treatment diets, including a control diet with no antimicrobial agents (CON), a positive control diet containing chlortetracycline, 100 mg/kg (CT), a diet containing anti-Salmonella Typhimurium bacteriophage, 3 × 10(9) plaque-forming units/kg of feed (ASB), Lactobacillus plantarum CJLP56, 6.5 × 10(8) cfu/kg of feed (LP), 0.2% microencapsulated organic acids (MOA), or 5% fermented soybean meal (FSM). Pigs were fed the diets for 2 wk before and 2 wk after challenging orally with Salmonella enterica serotype Typhimurium (SalT). Before bacterial challenge, ADFI was similar in all groups. After SalT challenge, ADFI of CON pigs was less (P < 0.05) than all other groups. Before challenge, pigs on MOA, FSM, and CT diets had greater (P < 0.05) ADG and G:F than CON pigs. After challenge (wk 3 to 4) and during the overall experimental period (wk 1 to 4), ADG of all treatment groups and G:F of all treatment groups except the LP group were greater (P < 0.05) than those of CON pigs. Relative to all other treatments, CON and LP pigs had greater (P < 0.05) bacterial shedding scores on d 7 after SalT challenge. At d 14 postchallenge, shedding scores declined (P < 0.05) in all treatment groups compared with CON pigs. Serum haptoglobin for all treatment groups increased from d 0 concentrations on d 6 postchallenge and declined to prechallenge concentrations on d 13 (P < 0.05). Circulating IGF-I concentrations declined from 2 to 6 d postchallenge and increased again by d 13 in ASB and LP groups, did not decline in FSM and CT groups, and continuously declined through d 13 in CON and LP groups (P < 0.05). However, in MOA group, IGF-I concentrations declined from preinfection concentrations on d 2, increased on d 4, and declined again until d 13 (P < 0.05). The serum concentrations of the cytokines IL-6 and IL-1β were not generally affected by SalT challenge. In conclusion, acute infection of growing pigs with SalT was associated with short-term febrile responses in most pigs and reductions in ADFI and ADG of CON pigs. Compared with the CON diet, ASB, FSM, and MOA diets had a similar benefit to the antibiotic-supplemented diet in improving the performance of growing pigs, especially after bacterial challenge. However, further work needs to be done to better understand their mode of action in this class of pigs.
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Affiliation(s)
- E Gebru
- Laboratory of Veterinary Pharmacokinetics and Pharmacodynamics, College of Veterinary Medicine, Kyungpook National University, Daegu, 702-701, Republic of Korea
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Park SC, Jeen YT, Keum B, Seo YS, Kim YS, Chun HJ, Um SH, Kim CD, Ryu HS. Education and Imaging. Gastrointestinal: a retroperitoneal liposarcoma that formed a fistula into the descending colon. J Gastroenterol Hepatol 2010; 25:1013. [PMID: 20546457 DOI: 10.1111/j.1440-1746.2010.06344.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [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: 12/09/2022]
Affiliation(s)
- S C Park
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea
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Sravan Kumar R, Sasi Jyothsna TS, Sasikala C, Seong CN, Lim CH, Park SC, Ramana CV. Shewanella fodinae sp. nov., isolated from a coal mine and from a marine lagoon. Int J Syst Evol Microbiol 2009; 60:1649-1654. [PMID: 19717581 DOI: 10.1099/ijs.0.017046-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Strains JC15(T) and JC19 were isolated from samples collected from different locations in India, including a coal mine and a marine lagoon. Both strains were Gram-stain-negative rods, motile by means of a single polar flagellum, catalase- and oxidase-positive, and hydrolysed casein, produced H(2)S and showed beta-haemolysis. Strain JC15(T) grew optimally at pH 6 (range pH 5-8) while strain JC19 grew optimally at pH 7 (range pH 6-9) and both had a growth temperature optimum of 30-37 degrees C (range 22-40 degrees C). Both strains could grow chemo-organoheterotrophically and chemolithoautotrophically. Neither strain required NaCl for growth and both could tolerate up to 9 % (w/v) NaCl, with optimum growth at 5 % NaCl. Vitamin B(12) was required as a growth factor by both strains. The major fatty acids were iso-C(15 : 0), C(17 : 1)omega8c and iso-C(13 : 0) 3-OH. The DNA G+C contents of strains JC15(T) and JC19 were 53.6 and 54.3 mol%, respectively. A phylogenetic tree based on 16S rRNA gene sequence analysis showed that strains JC15(T) and JC19 were most closely related to Shewanella haliotis DW01(T) (approximately 94 % sequence similarity) and to other members of the genus Shewanella. Genomic relatedness (DNA-DNA hybridization) between strains JC15(T) and JC19 is 88 %. On the basis of phenotypic and molecular genetic evidence, strain JC15(T) represents a novel species of the genus Shewanella, for which the name Shewanella fodinae sp. nov. is proposed. The type strain is JC15(T) (=CCUG 57102(T) =NBRC 105216(T) =KCTC 22506(T)).
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Affiliation(s)
- R Sravan Kumar
- Bacterial Discovery Laboratory, Centre for Environment, Institute of Science and Technology, J. N. T. University, Kukatpally, Hyderabad 500 085, India
| | - T S Sasi Jyothsna
- Bacterial Discovery Laboratory, Centre for Environment, Institute of Science and Technology, J. N. T. University, Kukatpally, Hyderabad 500 085, India
| | - Ch Sasikala
- Bacterial Discovery Laboratory, Centre for Environment, Institute of Science and Technology, J. N. T. University, Kukatpally, Hyderabad 500 085, India
| | - C N Seong
- Department of Biology, College of Life Science and Natural Resources, Sunchon National University, Suncheon 540-742, Republic of Korea
| | - C H Lim
- Department of Biology, College of Life Science and Natural Resources, Sunchon National University, Suncheon 540-742, Republic of Korea
| | - S C Park
- Department of Biology, College of Life Science and Natural Resources, Sunchon National University, Suncheon 540-742, Republic of Korea
| | - Ch V Ramana
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, PO Central University, Hyderabad 500 046, India
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Park SC, Yoo HS, Park C, Cho CK, Kim GY, Kim WJ, Lee YW, Choi YH. Induction of apoptosis in human lung carcinoma cells by the water extract of Panax notoginseng is associated with the activation of caspase-3 through downregulation of Akt. Int J Oncol 2009; 35:121-7. [PMID: 19513559 DOI: 10.3892/ijo_00000320] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The root of Panax notoginseng is highly valued and commonly used in Oriental medicine. Although recent experimental data have revealed the proapoptotic potency of P. notoginseng extracts, the underlying molecular mechanisms of this apoptotic activity have not yet been studied in detail. In the present study, the effects of the water extract of P. notoginseng (WEPN) on the growth of human lung carcinoma cells were investigated. It was found that the exposure of A549 and NIC-H460 cells to WEPN resulted in growth inhibition and the induction of apoptosis in a dose-dependent manner. The WEPN treatment induced the upregulation of pro-apoptotic Bax, downregulation of anti-apoptotic Bcl-2 expression and loss of mitochondrial membrane potential (MMP), which was associated with the proteolytic activation of caspases and the concomitant degradation of poly(ADP ribose) polymerase (PARP) protein. However, the caspase-3-specific inhibitor z-DEVD-fmk blocked PARP degradation and increased the survival rate of WEPN-treated cells. Moreover, the activity of Akt was downregulated in WEPN-treated cells and the phosphatidylinositol-3 kinase (PI3K)/Akt inhibitor LY294002 sensitized the cells to WEPN-induced apoptosis through enhancing the activation of caspase-3 and loss of MMP. The results indicated that the major regulators of WEPN-induced apoptosis in human lung carcinoma cells are the Bcl-2 family and caspase-3, which are associated with mitochondrial dysfunction and dephosphorylation of the Akt signaling pathway.
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Affiliation(s)
- Seung Chan Park
- Department of East-West Cancer Center, College of Oriental Medicine, Daejeon University, Daejeon 301-724, Korea
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Sucharita K, Sasikala C, Park SC, Baik KS, Seong CN, Ramana CV. Shewanella chilikensis sp. nov., a moderately alkaliphilic gammaproteobacterium isolated from a lagoon. Int J Syst Evol Microbiol 2009; 59:3111-5. [PMID: 19643885 DOI: 10.1099/ijs.0.010918-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A Gram-negative, motile, rod-shaped, facultatively anaerobic bacterium was isolated from sediment of Chilika Lagoon, a brackish water lagoon in India. The strain, designated JC5(T), was able to grow in the presence of 0-8.0 % NaCl and at pH 7.0-10.0. The isolate was positive for oxidase and catalase and exhibited alpha-haemolysis. The major fatty acids were iso-C(15 : 0) (18.3 %), C(16 : 0) (11.3 %), C(17 : 1)omega8c (13.1 %) and a summed feature, C(16 : 1)omega7c and/or C(16 : 1)omega6c (15.1 %). The genomic DNA G+C content was 54.6 mol%. A phylogenetic tree based on the 16S rRNA gene sequences showed that strain JC5(T) forms a lineage within the genus Shewanella and is closely related to Shewanella haliotis DW01(T) (98.0 %), Shewanella algae ATCC 51192(T) (97.6 %) and Shewanella marina C4(T) (95.8 %). Further, genomic DNA-DNA hybridization of strain JC5(T) with S. haliotis DW01(T) and S. algae ATCC 51192(T) showed relatedness of only 42 and 23 %, respectively. On the basis of phenotypic and molecular genetic evidence, strain JC5(T) represents a novel species of the genus Shewanella, for which the name Shewanella chilikensis sp. nov. is proposed. The type strain is JC5(T) (=CCUG 57101(T) =NBRC 105217(T) =KCTC 22540(T)).
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Affiliation(s)
- K Sucharita
- Bacterial Discovery Laboratory, Centre for Environment, Institute of Science and Technology, J.N.T. University, Kukatpally, Hyderabad 500 085, India
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Myung DS, Kim TJ, Lee SJ, Park SC, Kim JS, Kim JC, Yoon W, Lee SS, Park YW. Lupus-associated pancreatitis complicated by pancreatic pseudocyst and central nervous system vasculitis. Lupus 2009; 18:74-7. [PMID: 19074172 DOI: 10.1177/0961203308093462] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Pancreatitis is an uncommon manifestation of systemic lupus erythematosus (SLE), but this can occasionally cause major complications. We report in this article, a case of 33-year-old female patient who developed lupus-associated pancreatitis that was subsequently complicated by pancreatic pseudocyst and central nervous system (CNS) vasculitis. Abdominal computed tomography (CT) showed an oedematous swelling of the pancreas and a pseudocyst measuring 4 x 3 cm2. Brain magnetic resonance imaging (MRI) showed multiple high-signal intensity lesions in both cerebral hemispheres. The pseudocyst did not completely resolve with high-dose steroid therapy, and it was later complicated by infection and rupture. After a surgical drainage for the complicated pseudocyst, her clinical symptoms and signs were markedly improved. This case shows the importance of performing early drainage rather than conservative treatment for a pancreatic pseudocyst in a patient with lupus-associated pancreatitis.
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Affiliation(s)
- D S Myung
- Department of Rheumatology, Chonnam National University Medical School and Hospital, Gwangju, Republic of Korea
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Park JP, Park SC, Park CK. [A case of gastric glomus tumor]. Korean J Gastroenterol 2008; 52:310-314. [PMID: 19077478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Glomus tumor is a tumor arising from glomus body, a nodular form of arteriolovenular anastomosis that functions to regulate blood flow according to temperature. Gastrointestinal glomus tumors are rare and most frequently occur in the stomach as a subepithelial tumor. A 46-year-old woman presented with an incidental finding of a subepithelial tumor in the stomach. Endoscopic ultrasonography (EUS) showed a 1.4chi1 cm sized well circumscribed heterogeneous hypoechoic tumor with a few tubular structures in the fourth sonographic layer of the gastric wall. Characteristically, more hypoechoic halo equal to the echogenecity of proper muscle layer enclosed the tumor. Contrast enhanced abdominal computerized tomography (CT) revealed high enhancement of tumor up to the same level of portal vein in arterial phase and this enhancement persisted to portal phase. For histolgogic confirmation and treatment, endoscopic enucleation was attempted but failed due to fibrotic adhesion with the surrounding tissue. Histologic findings of biopsy specimen were compatible with glomus tumor. Although it is difficult to diagnose glomus tumor preoperatively, these characteristic findings in EUS and CT seem to be useful in distinguishing glomus tumor from other tumors arising from the fourth sonographic layer of gastric wall.
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Affiliation(s)
- Jong Pil Park
- Department of Internal Medicine, Daegu Fatima Hospital, Daegu, Korea
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Kim DG, Park SC, Moon IS, Lee MD. Reconstruction of three right hepatic veins using cadaveric iliac vein in right lobe living donor liver transplantation: case report. Transplant Proc 2008; 40:2523-4. [PMID: 18929787 DOI: 10.1016/j.transproceed.2008.07.022] [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: 10/21/2022]
Abstract
In various right hepatic vein anatomies, reconstruction is a surgically challenging technique in right lobe living donor liver transplantation. The right inferior hepatic vein is the most common hepatic vein abnormality in right lobe living-donor liver transplantation. Three accessory right hepatic veins is a rare right hepatic vein variation. We experienced one case of three right hepatic vein reconstruction among 300 partial liver transplantations using the right lobe in our center over 10 years. The donor right lobe had one main right hepatic vein and three accessory hepatic veins at the lower border of the liver. Restoration of accessory hepatic veins to the inferior vena cava was performed after construction of one conduit from the three accessory hepatic veins using a cadaveric donor iliac vein.
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Affiliation(s)
- D G Kim
- Division of Transplant and Vascular Surgery, Department of Surgery, Kangnam St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
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Kim HY, Lee SB, Chung YH, Lim CH, Yu IJ, Park SC, Shin JY, Kim SH, Shin DH, Kim JC. Evaluation of Subchronic Inhalation Toxicity of Dimethyl Disulfide in Rats. Inhal Toxicol 2008; 18:395-403. [PMID: 16513596 DOI: 10.1080/08958370500516291] [Citation(s) in RCA: 19] [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] [Indexed: 10/25/2022]
Abstract
This study was carried out to investigate the potential subchronic inhalation toxicity of dimethyl disulfide (DMDS) via whole-body exposure in F344 rats. Groups of 10 rats of each sex were exposed to DMDS vapor by whole-body exposure at concentrations of 0, 5, 25, or 125 ppm for 6 h/day, 5 days/wk for 13 wk. All the rats were sacrificed at the end of treatment period. During the test period, clinical signs, mortality, body weights, food consumption, ophthalmoscopy, urinalysis, hematology, serum biochemistry, gross findings, organ weights, and histopathology were examined. At 25 ppm, a decrease in the body weight gain, food intake, aspartate aminotransferase (AST), alanine aminotransferase (ALT), and blood urea nitrogen (BUN) was observed in the males, but not in the females. However, at 125 ppm, a decrease in the body weight gain, food intake, and thymus weight and an increase in the weights of adrenal glands were observed in both genders. Serum biochemical investigations revealed a decrease in the AST, ALT, BUN, creatine phosphokinase (CPK), and triglyceride levels and an increase in the glucose level. In contrast, no treatment-related effects were observed in the 5 ppm group. The toxic potency of DMDS was slightly higher in males than that in females. In these experimental conditions, the target organ was not determined in rats. The no-observed-adverse-effect concentration (NOAEC) was found to be 5 ppm, 6 h/day for male rats and 25 ppm, 6 h/day for female rats.
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Affiliation(s)
- H Y Kim
- Industrial Chemicals Research Center, Industrial Safety and Health Research Institute, Korea Industrial Safety Corporation, Daejeon, South Korea
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Hong SW, Park SC. Development of distant stereoacuity in visually normal children as measured by the Frisby-Davis distance stereotest. Br J Ophthalmol 2008; 92:1186-9. [PMID: 18614571 DOI: 10.1136/bjo.2008.138362] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
AIMS To establish the range of normal distance stereoacuity and evaluate its development in visually normal children by using the Frisby-Davis distance stereotest (FD2). METHODS The distance stereoacuity of visually normal children aged less than 11 years and of adults was measured with FD2 using a standard testing protocol. RESULT This study involved 94 visually normal children aged 36-131 months and 46 visually normal adults aged 20-49 years. The distance stereoacuity of the children aged 36-59 months was 40.61 (SD 9.823) seconds of arc; that of the children aged 60-119 months, 14.18 (8.152) seconds of arc; and that of the adults, 12.50 (4.802) seconds of arc. The FD2 distance stereoacuity of the children aged 36-59 months differed significantly from that of the older subjects (p = 0.000), and the FD2 distance stereoacuity of the children aged more than 59 months did not differ significantly from that of the adults (p = 0.813). CONCLUSION Distance stereoacuity reaches adult levels at approximately 5 years of age. These data of the age-related normal values could represent a reference frame for the comparison of data obtained for clinical populations.
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Affiliation(s)
- S W Hong
- Department of Ophthalmology, Kangnam St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
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Ryu SJ, An HJ, Oh YS, Choi HR, Ha MK, Park SC. On the role of major vault protein in the resistance of senescent human diploid fibroblasts to apoptosis. Cell Death Differ 2008; 15:1673-80. [DOI: 10.1038/cdd.2008.96] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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Oh YS, Khil LY, Cho KA, Ryu SJ, Ha MK, Cheon GJ, Lee TS, Yoon JW, Jun HS, Park SC. A potential role for skeletal muscle caveolin-1 as an insulin sensitivity modulator in ageing-dependent non-obese type 2 diabetes: studies in a new mouse model. Diabetologia 2008; 51:1025-34. [PMID: 18408913 DOI: 10.1007/s00125-008-0993-0] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [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: 02/14/2008] [Accepted: 02/21/2008] [Indexed: 10/22/2022]
Abstract
AIMS/HYPOTHESIS Type 2 diabetes mellitus is a common age-dependent disease. We discovered that male offspring of non-diabetic C57BL/6 and DBA/2 mice, called JYD mice, develop type 2 diabetes when they grow old. JYD mice show characteristics of insulin resistance, hyperglycaemia and hyperinsulinaemia in old age without obesity. We postulated that the mechanism of age-dependent type 2 diabetes in this model relates to caveolin-1 status in skeletal muscle, which appears to regulate insulin sensitivity in the mice. METHODS We compared insulin sensitivity in aged C57BL/6 and JYD mice using glucose and insulin tolerance tests and (18)F-fluorodeoxyglucose positron emission tomography. We also determined insulin signalling molecules and caveolin proteins using western blotting, and altered caveolin-1 levels in skeletal muscle of C57BL/6 and JYD mice using viral vector systems, to examine the effect of this on insulin sensitivity. RESULTS In 30-week-old C57BL/6 and JYD mice, the basal levels of IRS-1, Akt and peroxisome proliferator-activated receptor-gamma decreased, as did insulin-stimulated phosphorylation of Akt and insulin receptor beta. However, caveolin-1 was only increased about twofold in 30-week-old JYD mice as compared with 3-week-old mice, whereas an eightfold increase was seen in C57BL/6 mice. Downregulation of caveolin-1 production in C57BL/6 mice caused severe impairment of glucose and insulin tolerance. Upregulation of caveolin-1 in aged diabetic JYD mice significantly improved insulin sensitivity with a concomitant increase of glucose uptake in the skeletal muscle. CONCLUSIONS/INTERPRETATION The level of skeletal muscle caveolin-1 is correlated with the progression of age-dependent type 2 diabetes in JYD mice.
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Affiliation(s)
- Y S Oh
- Department of Biochemistry and Molecular Biology, Aging and Apoptosis Research Center, Seoul National University College of Medicine, 28 Yungon Dong, Chongno Ku, Seoul 110-799, South Korea
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Park JC, Jung CY, Lee JK, Lee YJ, Park SC, Seo HJ, Kim YJ, Lee BK, Huh DM, Sohn KR. A Case of Exogenous Lipoid Pneumonia after Ingestion of Squalene in Patients with Achalasia. Tuberc Respir Dis (Seoul) 2008. [DOI: 10.4046/trd.2008.65.5.421] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Affiliation(s)
- Jung Chul Park
- Department of Internal Medicine, Daegu Fatima Hospital, Daegu, Korea
| | - Chi Young Jung
- Department of Internal Medicine, Daegu Fatima Hospital, Daegu, Korea
| | - Jae Kwang Lee
- Department of Internal Medicine, Daegu Fatima Hospital, Daegu, Korea
| | - Yu Jin Lee
- Department of Internal Medicine, Daegu Fatima Hospital, Daegu, Korea
| | - Seung Chan Park
- Department of Internal Medicine, Daegu Fatima Hospital, Daegu, Korea
| | - Hye Jin Seo
- Department of Internal Medicine, Daegu Fatima Hospital, Daegu, Korea
| | - Yeon Jae Kim
- Department of Internal Medicine, Daegu Fatima Hospital, Daegu, Korea
| | - Byung Ki Lee
- Department of Internal Medicine, Daegu Fatima Hospital, Daegu, Korea
| | - Dong Myung Huh
- Department of Thoracic and Cardiovascular Surgery, Daegu Fatima Hospital, Daegu, Korea
| | - Kyung Rak Sohn
- Department of Pathology, Daegu Fatima Hospital, Daegu, Korea
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Park SC, Jeong H. Memory-efficient iterative process on a two-dimensional first-order regular graph. Opt Lett 2008; 33:74-76. [PMID: 18157263 DOI: 10.1364/ol.33.000074] [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] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
We present a parallel and memory-efficient iterative algorithm based on 2D first-order regular graphs. For an M x N regular graph with L iterations, a carefully chosen computation order can reduce the memory resources from O(MN) to O(ML). This scheme can achieve a memory reduction of 4 to 27 times in typical computation-intensive problems such as stereo and motion.
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Affiliation(s)
- S C Park
- Electronic Department, Pohang University of Science and Technology, Pohang 790-784, South Korea.
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Yang YS, Ahn TH, Lee JC, Moon CJ, Kim SH, Park SC, Chung YH, Kim HY, Kim JC. Effects of tert-butyl acetate on maternal toxicity and embryo-fetal development in Sprague-Dawley rats. ACTA ACUST UNITED AC 2007; 80:374-82. [PMID: 17948321 DOI: 10.1002/bdrb.20124] [Citation(s) in RCA: 11] [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] [Indexed: 11/07/2022]
Abstract
This study investigated the potential adverse effects of tert-butyl acetate (TBAc) on maternal toxicity and embryo-fetal development after maternal exposure of pregnant rats from gestational days 6 through 19. TBAc was administered to pregnant rats by gavage at 0, 400, 800, and 1,600 mg/kg/day. All dams were subjected to a Caesarean section on day 20 of gestation, and their fetuses were examined for any morphological abnormalities. At 1,600 mg/kg, maternal toxicity manifested as increases in the incidence of clinical signs and death, lower body weight gain and food intake, increases in the weights of adrenal glands and liver, and a decrease in thymus weight. Developmental toxicity included a decrease in fetal weight, an increase in the incidence of skeletal variation, and a delay in fetal ossification. At 800 mg/kg, only a minimal developmental toxicity, including an increase in the incidence of skeletal variation and a delay in fetal ossification, were observed. In contrast, no adverse maternal or developmental effects were observed at 400 mg/kg. These results show that a 14-day repeated oral dose of TBAc is embryotoxic at a maternally toxic dose (i.e., 1,600 mg/kg/day) and is minimally embryotoxic at a nonmaternally toxic dose (i.e., 800 mg/kg/day) in rats. However, no evidence for the teratogenicity of TBAc was noted in rats. It is concluded that the developmental findings observed in the present study are secondary effects to maternal toxicity. Under these experimental conditions, the no-observed-adverse-effect level of TBAc is considered to be 800 mg/kg/day for dams and 400 mg/kg/day for embryo-fetal development.
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Affiliation(s)
- Y S Yang
- College of Veterinary Medicine, Chonnam National University, Gwangju, Republic of Korea
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Ryu SJ, Oh YS, Park SC. Failure of stress-induced downregulation of Bcl-2 contributes to apoptosis resistance in senescent human diploid fibroblasts. Cell Death Differ 2007; 14:1020-8. [PMID: 17290286 DOI: 10.1038/sj.cdd.4402091] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
We previously reported that senescent human diploid fibroblasts (HDFs) are resistant to apoptosis induced by H(2)O(2) and staurosporine. We report here that senescent HDFs are resistant to thapsigargin-induced apoptosis as well. These agonists caused the reductions in mitochondrial membrane potential (MMP) and in the apoptosis inhibitory protein (B-cell lymphoma) only in young HDFs but not in senescent HDFs. In addition, downregulation of Bcl-2 increased the sensitivity of senescent HDFs to apoptosis induction, suggesting the significant role of Bcl-2 in apoptosis resistance of the senescent HDFs. We further found that P-cAMP response element-binding protein (CREB), a positive regulator of Bcl-2, decreased in stress-induced apoptosis of young HDFs but not in senescent HDFs, and that Bcl-2 was markedly reduced in CREB small interfering RNA (siRNA), transfected senescent HDFs. In addition, activity of protein phosphatase 2A (PP2A), which dephosphorylates p-CREB, significantly increased in young HDFs but not in senescent HDFs treated with H(2)O(2), staurosporine or thapsigargin. Taken together, these results suggest that failure of stress-induced downregulation of Bcl-2 underlies resistance of senescent HDFs to apoptosis.
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Affiliation(s)
- S J Ryu
- Department of Biochemistry and Molecular Biology, The Aging and Apoptosis Research Center, Seoul National University College of Medicine, Seoul, Korea
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Shin GW, Palaksha KJ, Kim YR, Nho SW, Cho JH, Heo NE, Heo GJ, Park SC, Jung TS. Immunoproteomic analysis of capsulate and non-capsulate strains of Lactococcus garvieae. Vet Microbiol 2007; 119:205-12. [PMID: 16997511 DOI: 10.1016/j.vetmic.2006.08.021] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2006] [Revised: 08/04/2006] [Accepted: 08/16/2006] [Indexed: 11/25/2022]
Abstract
A comparative immunoproteomic study was carried out to investigate the immunogenicity of capsulate (KG9408) and non-capsulate (NSS9310) strains of Lactococcus garvieae. Immunoblot assays, following two-dimensional gel electrophoresis (2-DE) for L. garvieae strains, revealed a significant difference between anti-capsulate and anti-non-capsulate rabbit sera with respect to the number and antigenicity of antigenic spots. Anti-capsulate and anti-non-capsulate rabbit sera reacted with an average of 72 and 127 antigenic spots, respectively. The strong reaction of anti-non-capsulate sera with elongation factor (EF)-G and -Tu, and GMP synthase, of the L. garvieae strains identifies these as specific major antigens. This study clearly demonstrates the differences in 2-DE immunoblot profiles between the capsulate and non-capsulate strains of L. garvieae. These differences may be the reason for variations in immunogenicity between capsulate and non-capsulate strains. Glyceraldehyde-3-phosphate dehydrogenase, phosphoglycerate kinase, arginine deaminase and ornithine carbamoyltransferase were identified from the 2-DE immunoblot profiles of both strains. Therefore, these common antigens are potential markers for the development of vaccines against L. garvieae, irrespective of strain. Immunoproteomics, a powerful tool for studying antigens at the proteomic level, allowed a comparative investigation of the immunogenicity of capsulate and non-capsulate strains of L. garvieae for vaccine development.
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Affiliation(s)
- G W Shin
- Institute of Animal Medicine, College of Veterinary Medicine, Gyeongsang National University, Jinju 660-701, South Korea
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