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Park JK, Hong IH, Goo MJ, Ki MR, Hong KS, Hwang OK, Han JY, Ji AR, Park SI, Jeong KS. Subcutaneous leiomyosarcoma in an adrenomedullin heterozygous mouse. ACTA ACUST UNITED AC 2010; 62:221-5. [DOI: 10.1016/j.etp.2009.03.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2009] [Accepted: 03/23/2009] [Indexed: 10/20/2022]
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Park JK, Ahn YH, Park JY, Lee S, Park KH. Electron beam induced current measurements on single-walled carbon nanotube devices. NANOTECHNOLOGY 2010; 21:115706. [PMID: 20173234 DOI: 10.1088/0957-4484/21/11/115706] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We report on electron beam induced current (EBIC) from individual carbon nanotubes (CNTs) which are in contact with metal electrodes. The EBIC signals originate from the diffusion of excess carriers induced by the electron beam bombardment. The EBIC image enables us to locate the individual CNTs efficiently. From the polarity of the EBIC signals we can identify the electrical contacts to the metal electrodes. More importantly, we demonstrate that the EBIC can be used to characterize the local electrical properties of CNT-based devices, such as asymmetry in metal contacts and the presence of defects. EBIC is also observed regardless of the presence of insulating surfaces, indicating that the EBIC is a result of the direct interaction between the CNTs and the electron beams.
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Ryu JC, Park HJ, Park JK, Kang KH. New electrohydrodynamic flow caused by the Onsager effect. PHYSICAL REVIEW LETTERS 2010; 104:104502. [PMID: 20366431 DOI: 10.1103/physrevlett.104.104502] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2009] [Indexed: 05/29/2023]
Abstract
We report a new type of electrohydrodynamic (EHD) flow generated around a circular cylinder and a spherical particle in a dielectric liquid under dc and ac electric fields. The EHD flow is observed for various combinations of dielectric liquids and polar additives. We suggest that the EHD flow is caused by a gradient of electrical conductivity produced by a nonuniform electric field and subsequent generation of free charge in the bulk liquid. Analytical and numerical analyses which are based on the leaky-dielectric model show good agreement with experimental results.
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Park JK, Hong IH, Ki MR, Hong KS, Ji AR, Do SH, Jeong KS. Multiple perianal infundibular follicular cysts in a dog. Vet Dermatol 2010; 21:303-6. [DOI: 10.1111/j.1365-3164.2009.00794.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Kim MK, Cheon J, Lee KS, Chung MK, Lee JY, Lee SW, Kim SW, Chung BH, Park K, Park JK. An open, non-comparative, multicentre study on the impact of alfuzosin on sexual function using the Male Sexual Health Questionnaire in patients with benign prostate hyperplasia. Int J Clin Pract 2010; 64:345-50. [PMID: 19891715 DOI: 10.1111/j.1742-1241.2009.02247.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
OBJECTIVES To determine the effect of alfuzosin on sexual function by using the Male Sexual Health Questionnaire (MSHQ) in men with lower urinary tract symptoms (LUTS) suggestive of benign prostatic hyperplasia (BPH). PATIENTS AND METHODS In this multicentre, open-label and non-comparative study, a total of 135 sexually active patients with LUTS were enrolled in Korea to receive alfuzosin 10 mg once daily for 12 weeks. International Prostate Symptom Score (IPSS) and a 25-item MSHQ exploring erection ejaculation and satisfaction with sex life were evaluated at baseline after 4 and 12 weeks of treatment. RESULTS Of 135 patients (age 58.8 years, duration of LUTS 2.6 years, mean values), 110 (81.5%) completed the study. The ejaculatory domain of the MSHQ significantly improved at the end-point in the intent-to-treat population (score difference of 2.24, p < or = 0.0001, n = 120). The domains of erection and sexual satisfaction improved at the end-point, but the score differences were not statistically significant. After the 12 weeks treatment, the total IPSS score significantly decreased from 17.9 to 12.1 (p < 0.0001), bother score decreased from 3.8 to 2.85 (p < 0.0001) and peak flow rate increased from 11.0 to 14.3 ml/s (p < 0.0001). A significant relationship between ejaculatory domains of MSHQ and IPSS was found. Four patients (2.9%) discontinued the trial for adverse event. CONCLUSIONS Based on the analysis of MSHQ scores before and after alfuzosin treatment, improvement was significant on ejaculatory function, in addition to improvement on LUTS and quality of life. MSHQ is a useful tool to evaluate the male sexual dysfunction.
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Machnik A, Neuhofer W, Jantsch J, Dahlmann A, Tammela T, Machura K, Park JK, Beck FX, Müller DN, Derer W, Goss J, Ziomber A, Dietsch P, Wagner H, van Rooijen N, Kurtz A, Hilgers KF, Alitalo K, Eckardt KU, Luft FC, Kerjaschki D, Titze J. New Approaches to Pathogenesis and Management of Hypertension. Clin J Am Soc Nephrol 2009. [DOI: 10.2215/01.cjn.0000927080.23541.88] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
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Ritz E, Krum H, Wang Y, Machnik A, Schlaich M, Whitbourn R, Sobotka PA, Sadowski J, Bartus K, Kapelak B, Walton A, Sievert H, Thambar S, Abraham WT, Esler M, Tsun Z, Neuhofer W, Jantsch J, Dahlmann A, Tammela T, Machura K, Park JK, Beck FX, Müller DN, Derer W, Goss J, Ziomber A, Dietsch P, Wagner H, van Rooijen N, Kurtz A, Hilgers KF, Alitalo K, Eckardt KU, Luft FC, Kerjaschki D, Titze J. New Approaches to Pathogenesis and Management of HypertensionCatheter-based renal sympathetic denervation for resistant hypertension: A multicenter safety and proof-of-principle cohort study. Lancet 373: 1275–1281, 2009Klotho gene delivery prevents the progression of spontaneous hypertension and renal damage. Hypertension 54: 810–817, 2009Macrophages regulate salt-dependent volume and blood pressure by a vascular endothelial growth factor-C-dependent buffering mechanisms. Nat Med 15: 545–552, 2009. Clin J Am Soc Nephrol 2009; 4:1886-91. [DOI: 10.2215/cjn.07561009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Goo MJ, Ki MR, Lee HR, Yang HJ, Yuan DW, Hong IH, Park JK, Hong KS, Han JY, Hwang OK, Kim DH, Do SH, Cohn RD, Jeong KS. Helicobacter pylori promotes hepatic fibrosis in the animal model. J Transl Med 2009; 89:1291-303. [PMID: 19736546 DOI: 10.1038/labinvest.2009.90] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Helicobacter pylori infection has been reported to be very common in patients with chronic liver diseases, including cirrhosis. To elucidate the pathological effect of H. pylori infection on the progression of hepatic fibrosis, C57BL/6 mice and Sprague-Dawley rats were orally inoculated with H. pylori, and hepatic fibrosis was induced with carbon tetrachloride (CCl(4)) administration. We observed the histopathological changes and the presence of H. pylori genes by PCR in the liver. Significant increase in the fibrotic score as well as in serum alanine aminotransferase and aspartate aminotransferase levels was shown in the CCl(4)+H. pylori group compared with that in the CCl(4)-treated group. Compared with the CCl(4)-treated group, alpha-smooth muscle actin and transforming growth factor-beta1 were enhanced; however, senescence marker protein-30, a multifunctional protein protecting hepatocytes against oxidative stress and apoptosis, was suppressed in the CCl(4)+H. pylori group. The 16S rRNA (400 bp) was demonstrated by PCR for H. pylori genes from genomic DNA extracted from the liver, and H. pylori-infected mice showed 93.8% (15 of 16) seropositivity by contrast with seronegativity in all H. pylori-noninfected mice. In addition, immunohistochemical study against H. pylori showed positive antigen fragments in the liver of the infected groups. Consequently, our data suggest that H. pylori infection could be an important contributing infectious factor to the development of liver cirrhosis.
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Park JK, Goo MJ, Hong IH, Ki MR, Han JY, Jeong KS. Immunohistochemistry Diagnosis of an Ovarian Dysgerminoma in One Bitch. Reprod Domest Anim 2009; 44:855-8. [DOI: 10.1111/j.1439-0531.2008.01135.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Goo MJ, Ki MR, Lee HR, Yang HJ, Yuan DW, Hong IH, Park JK, Hong KS, Han JY, Hwang OK, Kim DH, Do SH, Cohn RD, Jeong KS. Helicobacter pylori promotes hepatic fibrosis in the animal model. LABORATORY INVESTIGATION; A JOURNAL OF TECHNICAL METHODS AND PATHOLOGY 2009. [PMID: 19736546 DOI: 10.138/labinvest.2009.90] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Helicobacter pylori infection has been reported to be very common in patients with chronic liver diseases, including cirrhosis. To elucidate the pathological effect of H. pylori infection on the progression of hepatic fibrosis, C57BL/6 mice and Sprague-Dawley rats were orally inoculated with H. pylori, and hepatic fibrosis was induced with carbon tetrachloride (CCl(4)) administration. We observed the histopathological changes and the presence of H. pylori genes by PCR in the liver. Significant increase in the fibrotic score as well as in serum alanine aminotransferase and aspartate aminotransferase levels was shown in the CCl(4)+H. pylori group compared with that in the CCl(4)-treated group. Compared with the CCl(4)-treated group, alpha-smooth muscle actin and transforming growth factor-beta1 were enhanced; however, senescence marker protein-30, a multifunctional protein protecting hepatocytes against oxidative stress and apoptosis, was suppressed in the CCl(4)+H. pylori group. The 16S rRNA (400 bp) was demonstrated by PCR for H. pylori genes from genomic DNA extracted from the liver, and H. pylori-infected mice showed 93.8% (15 of 16) seropositivity by contrast with seronegativity in all H. pylori-noninfected mice. In addition, immunohistochemical study against H. pylori showed positive antigen fragments in the liver of the infected groups. Consequently, our data suggest that H. pylori infection could be an important contributing infectious factor to the development of liver cirrhosis.
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Hong IH, Lee HS, Park JK, Goo MJ, Yuan DW, Hwang OK, Hong KS, Han JY, Ji AR, Ki MR, Jeong KS. Actinomycosis in a pet rabbit. J Vet Dent 2009; 26:110-1. [PMID: 19718975 DOI: 10.1177/089875640902600206] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Shushakova N, Park JK, Menne J, Fliser D. Chronic erythropoietin treatment affects different molecular pathways of diabetic cardiomyopathy in mouse. Eur J Clin Invest 2009; 39:755-60. [PMID: 19614950 DOI: 10.1111/j.1365-2362.2009.02165.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND Recent studies in mice experimental models with acute ischaemic injury revealed that erythropoietin (EPO) has numerous tissue-protective effects in the heart, brain and kidneys. We therefore explored the tissue-protective properties of chronic EPO treatment in an experimental model of the db/db mouse with diabetic heart injury. MATERIAL AND METHODS We randomly treated 11 db/db mice with placebo (saline), 0.4 microg of the continuous erythropoietin receptor activator (CERA) per week (n = 11) or 1.2 microg CERA per week (n = 11) for 14 weeks, and analysed cardiac tissue. The lower CERA dose was a non-haematologically effective dose, whereas the second increased the haematocrit. RESULTS Compared with mice in the placebo group, CERA-treated mice had a reduction in TGF-beta(1) and collagen I expression in cardiac tissue (P < 0.01 vs. higher dose CERA). In addition, an increased expression of the pro-survival intracellular pathway p-AKT was observed (P < 0.05 vs. higher dose CERA). The values for the lower C.E.R.A had an intermediate nonsignificant effect. Furthermore, we were able to show that atrial natriuretic peptide (ANP) expression was increased in both CERA groups. CONCLUSIONS Chronic treatment with CERA protects cardiac tissue in diabetic animals, i.e. it inhibits molecular pathways of cardiac fibrosis, and the effects are dose-dependent.
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Park JK, Moon JH, Kim HK, Choi HJ, Kang JH, Kim HK, Ko BM, Cho YD, Lee MS, Shim CS. Wire-guided endoscopic snare resection of a choledochocele-associated villous adenoma. Endoscopy 2009; 41 Suppl 2:E78-9. [PMID: 19370521 DOI: 10.1055/s-0029-1214429] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
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Park JK, Han JY, Hong IH, Hwang OK, Hong KS, Ji AR, Ki MR, Park SI, Kim TH, Choi DH, Jeong KS. Salivary mucocele with osseous metaplasia in a dog. J Vet Med Sci 2009; 71:975-7. [PMID: 19652488 DOI: 10.1292/jvms.71.975] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
A 4-year-old, male, dachshund was referred to a certain local veterinary hospital because of a soft and fluctuant swelling in the left upper cervical region. The swelling was surgically removed and appeared to be filled with bloody mucus. Grossly, the swelling was identified as salivary mucocele and showed small multifocal whitish ossified tissue on its surface. Microscopically, the wall of salivary mucocele appeared as granulation tissue surrounding mucin, which was composed of loose edematous and vascularized connective tissue containing chronic inflammatory cells such as lymphocytes, plasma cells and macrophages. Characteristically, present case had ossifying components formed by metaplastic spindle cells in the wall of salivary mucocele. Therefore, the present case was diagnosed as salivary mucocele with osseous metaplasia in a dog.
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Kim HJ, Lee IK, Lee YS, Kang WK, Park JK, Oh ST, Kim JG, Kim YH. A comparative study on the short-term clinicopathologic outcomes of laparoscopic surgery versus conventional open surgery for transverse colon cancer. Surg Endosc 2009; 23:1812-7. [PMID: 19263150 DOI: 10.1007/s00464-009-0348-z] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2008] [Revised: 10/29/2008] [Accepted: 01/12/2009] [Indexed: 12/11/2022]
Abstract
BACKGROUND The long-term oncologic stability of laparoscopic surgery for colon cancer was established, and laparoscopic surgery was accepted as an alternative to conventional open surgery for colon cancer. However, transverse colon cancer was excluded from the majority of the previous prospective studies. As a result, debate on laparoscopic surgery for transverse colon cancer continues. This study aimed to compare the clinicopathologic outcome of laparoscopic surgery with that of conventional open surgery for transverse colon cancer. METHODS From August 2004 to December 2007, 106 cases of transverse colon cancer were managed by resection at our institution, and 89 of these cases were included in this study. Age, sex, body mass index (BMI), operation time, blood loss, time to first flatus, time to start of diet, hospital stay, complications, tumor size, distal resection margin, proximal resection margin, and number of nodes harvested were compared between the two groups. RESULTS No significant differences were found between the laparoscopic and conventional groups in terms of age, sex, BMI, operation time, or hospital stay. The mean blood loss during the operations was significantly less in the laparoscopic group (113.8 +/- 128.9 ml) than in the conventional group (278.8 +/- 268.7 ml; p < 0.05). Moreover, the time to the first flatus was shorter (2.8 +/- 0.9 days vs. 4.4 +/- 2.0 days; p < 0.00) and the diet was started earlier (3.9 +/- 1.7 days vs. 5.4 +/- 1.9 days; p < 0.00) in the laparoscopic group. No intergroup differences in tumor size, proximal resection margin, or number of lymph nodes were observed. The mean distal resection margin was longer in the laparoscopic group (12.5 +/- 4.1 cm vs. 9.2 +/- 6.2 cm; p < 0.05). CONCLUSION Laparoscopic and conventional open surgeries were found to have similar clinical outcomes in transverse colon cancer, and the oncologic quality of laparoscopic surgery was found to be acceptable compared with conventional open surgery.
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Ki MR, Hong IH, Park JK, Hong KS, Hwang OK, Han JY, Ji AR, Park SI, Lee SK, Yoo SE, Jeong KS. Potent neutralization of vacuolating cytotoxin (VacA) of Helicobacter pylori by immunoglobulins against the soluble recombinant VacA. Anticancer Res 2009; 29:2393-2402. [PMID: 19528507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
BACKGROUND The recombinant vacuolating cytotoxin (rVacA) of Helicobacter pylori that retains native conformational epitopes was evaluated as a vaccine antigen for anti-H. pylori treatment. METHODS s1m1 vacA gene fraction encoding the mature VacA protein was expressed as a soluble protein in E. coli at low temperature. The efficacy of anti-rVacA antibody against VacA or H. pylori was assessed in vitro using AGS cells and in vivo using a murine model. RESULTS The rabbit antisera against rVacA completely neutralized the vacuolating activity and partially inhibited the cell death induced by VacA in AGS cells. Oral immunization of C57BL/6 mice with rVacA plus CpG-oligodeoxynucleotide (ODN) as an ajuvant stimulated specific anti-VacA antibody and mucosal immune responses which correlated with decreased systemic immune responses and gastric urease activities (p>0.05). CONCLUSION The rVacA antigen possessing conformational epitopes may have potential as a vaccine component and may be useful in serological and histopathological analysis.
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Kim JY, Kim DH, Choi J, Park JK, Jeong KS, Leeuwenburgh C, Yu BP, Chung HY. Changes in lipid distribution during aging and its modulation by calorie restriction. AGE (DORDRECHT, NETHERLANDS) 2009; 31:127-142. [PMID: 19277901 PMCID: PMC2693731 DOI: 10.1007/s11357-009-9089-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2008] [Accepted: 02/17/2009] [Indexed: 05/27/2023]
Abstract
Adipogenesis and ectopic lipid accumulation during aging have a great impact on the aging process and the pathogenesis of chronic diseases with age. However, at present, information on the age-related molecular changes in lipid redistribution patterns and their potential nutritional interventions is sparse. We investigated the mechanism underlying age-related lipid redistribution and its modulation using 5-, 17-, and 24-month-old male Fischer 344 rats fed ad libitum (AL) or a 3-week-long CR (40% less than AL) diet. Results revealed that the activities of adipogenic transcription factors were decreased in the white adipose tissue (WAT) of aged AL rats. In contrast, the skeletal muscle of aged AL rats showed increased fat accumulation through decreased carnitine palmitoyltransferase-1 activity, which was blunted by short-term CR. This study suggests an age-related shift in lipid distribution by reducing the adipogenesis of WAT while increasing intramyocellular lipid accumulation, and that CR can modulate age-related adipogenesis and ectopic lipid accumulation.
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Park JK, Song JH, He TC, Nam SW, Lee JY, Park WS. Overexpression of Wnt-2 in colorectal cancers. Neoplasma 2009; 56:119-23. [PMID: 19239325 DOI: 10.4149/neo_2009_02_119] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
UNLABELLED The binding of the Wnt ligand to its receptor Frizzled, activates the Wnt canonical signaling pathway in carcinogenesis as well as many cellular processes, including cellular proliferation and differentiation. Wnt-2, one of 19 members of the <em>Wnt</em> gene family, is frequently overexpressed in malignant tissues. Here, in order to investigate the role of Wnt-2 in colorectal carcinogenesis, we examined the expression of the Wnt-2 protein in 120 colorectal cancers by immunohistochemistry. Wnt-2 protein was expressed in the cell membrane and cytoplasm and up-regulated in 74 (61.7%) of 120 colorectal cancers. Statistically, overexpression of Wnt-2 protein was not associated with the clinical and pathological parameters studied, including tumor location, tumor size, clinical stage, lymph node metastasis, and 5-year survival (<em>P > </em>0.05). These results indicate that up-regulation of the Wnt-2 protein might play a role in the development of colorectal cancers, as an early event of carcinogenesis. KEYWORDS Wnt-2 protein, expression, immunohistochemistry, tissue microarray, colon cancer.
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Son HY, Kim JE, Lee SG, Kim HS, Lee E, Park JK, Ka H, Kim HJ, Lee CK. Efficient Derivation and Long Term Maintenance of Pluripotent Porcine Embryonic Stem-like Cells. ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES 2009. [DOI: 10.5713/ajas.2009.80343] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Kim KT, Park JK, Kang SG, Cho KS, Yoo DS, Jang DK, Huh PW, Kim DS. Comparison of the effect of decompressive craniectomy on different neurosurgical diseases. Acta Neurochir (Wien) 2009; 151:21-30. [PMID: 19096757 DOI: 10.1007/s00701-008-0164-6] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2008] [Accepted: 07/09/2008] [Indexed: 11/25/2022]
Abstract
BACKGROUND Many previous studies have reported that decompressive craniectomy has improved clinical outcomes in patients with intractable increased intracranial pressure (ICP) caused by various neurosurgical diseases. However there is no report that compares the effectiveness of the procedure in the different conditions. The authors performed decompressive craniectomy following a constant surgical indication and compared the clinical outcomes in different neurosurgical diseases. MATERIALS AND METHODS Seventy five patients who underwent decompressive craniectomy were analysed retrospectively. There were 28 with severe traumatic brain injury (TBI), 24 cases with massive intracerebral haemorrhage (ICH), and 23 cases with major infarction (MI). The surgical indications were GCS score less than 8 and/or a midline shift more than 6 mm on CT. The clinical outcomes were assessed on the basis of mortality and Glasgow Outcome Scale (GOS) scores. The changes of ventricular pressure related to the surgical intervention were also compared between the different disease groups. FINDINGS Clinical outcomes were evaluated 6 months after decompressive craniectomy. The mortality was 21.4% in patients with TBI, 25% in those with ICH and 60.9% in MI. A favourable outcome, i.e. GOS 4-5 (moderate disability or better) was observed in 16 (57.1%) patients with TBI, 12 (50%) with ICH and 7 (30.4%) with MI. The change of ventricular pressure after craniectomy and was 53.2 (reductions of 17.4%) and further reduced by 14.9% (with dural opening) and (24.8%) after returning to its recovery room, regardless of the diseases group. CONCLUSIONS According to the mortality and GOS scores, decompressive craniectomy with dural expansion was found to be more effective in patients with ICH or TBI than in the MI group. However, the ventricular pressure change during the decompressive craniectomy was similar in the different disease groups. The authors thought that decompressive craniectomy should be performed earlier for the major infarction patients.
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Jeong DH, Goo MJ, Hong IH, Yang HJ, Ki MR, DO SH, Ha JH, Lee SS, Park JK, Jeong KS. Inhibition of radiation-induced apoptosis via overexpression of SMP30 in Smad3-knockout mice liver. JOURNAL OF RADIATION RESEARCH 2008; 49:653-660. [PMID: 19001783 DOI: 10.1269/jrr.08042] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Apoptosis occurs early after irradiation and may be a good indicator of radiation damages. Since elevated levels of TGF-beta are associated with radiation-induced inflammation, the null mice of Smad3, a key downstream mediator of TGF-beta, show accelerated healing of irradiated injury. In order to evaluate resistance to radiation-induced liver injuries in Smad3-null mice, we determined the occurrence of apoptosis and the expression of senescence marker protein-30 (SMP30), as an anti-apoptotic marker, after irradiation to the liver. The livers of Smad3-mutant mice were exposed to local irradiation of 15 gray, from a (60)Co-gamma radiation. One week after irradiation, in Smad3-KO mice, radiation-induced apoptosis was at lower levels compared to those of irradiated WT mice. These findings were well matched with the expression of CYP2E1, which plays a role in hepatic injuries produced by oxidative stress. In addition, antioxidant related protein, the SMP30 levels were reduced by gamma irradiation in both groups. Interestingly, the increased expression of SMP30 expression in Smad3-KO mice liver was preserved at a higher level than that of the WT mice after irradiation. Therefore, these results suggest that the interruption of TGF-beta signaling by deletion of Smad3 brings about inhibition of hepatic apoptosis after ionizing irradiation. Moreover, the protective effect to ionizing radiation might be in correlation with the overexpression of SMP30 in the Smad3-null mice, which may act as an anti-apoptotic signaling molecule. The alteration of SMP30 by interruption of Smad3 might be a useful therapeutic target and diagnostic marker for radiation-induced liver damages.
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Jeong WI, Do SH, Hong IH, Ji AR, Park JK, Ki MR, Park SC, Jeong KS. Macrophages, myofibroblasts and mast cells in a rat liver infected with Capillaria hepatica. J Vet Sci 2008; 9:211-3. [PMID: 18487945 PMCID: PMC2839101 DOI: 10.4142/jvs.2008.9.2.211] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
We trapped a rat (Rattus norvegicus) infected with Capillaria hepatica. At necropsy, grossly yellowish-white nodules (2-3 mm in diameter) were noted to be scattered on the liver's surface. Microscopically, granulomatous and fibrotic nodules that contained the eggs and/or adult worms of Capillaria hepatica were detected in the liver. Septal fibrosis was diffusely formed throughout the liver. There were a number of ED1-positive macrophages located in the sinusoids of the pseudolobules. On the double staining, myofibroblasts and mast cells were generally observed within the fibrous septa with the mast cells in close proximity to the myofibroblasts. We suggest that the interactions between macrophages, myofibroblasts and mast cells play a role in the septal fibrosis observed in rats infected by Capillaria hepatica.
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Fixson SK, Park JK. The power of integrality: Linkages between product architecture, innovation, and industry structure. RESEARCH POLICY 2008. [DOI: 10.1016/j.respol.2008.04.026] [Citation(s) in RCA: 111] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Goo MJ, Williams BH, Hong IH, Park JK, Yang HJ, Yuan DW, Lee HR, Hong KS, Ki MR, Jeong KS. Multiple urogenital abnormalities in a Persian cat. J Feline Med Surg 2008; 11:153-5. [PMID: 18619885 DOI: 10.1016/j.jfms.2008.04.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/15/2008] [Indexed: 10/21/2022]
Abstract
A 1.5-year-old female Persian cat was presented for inappetence and azotemia. Ultrasonography and urography revealed multiple abnormalities involving the genitourinary tract, including agenesis of the right kidney and ureter. Gross examination of the abnormal uterus revealed segmental aplasia of right caudal uterine horn causing cranial distension with fluid, a normal left uterine horn, and both normal ovaries. Microscopically, endometrial glands of the right uterine horn were markedly decreased in number. The right uterine horn was hemorrhagic suggesting estrus. This is the first report of this combination of urinary and uterus abnormalities in the veterinary literature.
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