Park, Young Mi;Lim, Jae Hwan;Lee, Jong Eun;Seo, Eul Won
Journal of Life Science
/
v.25
no.5
/
pp.539-547
/
2015
This study aimed to investigate the protective effect of Semisulcospira libertina extract on liver injury induced by D-galactosamine in rats. After the administration of S. libertina extract, the local fat degeneration and infiltration of inflammatory cells in liver tissues were significantly decreased and peripheral hemorrhages around portal triads and central necrosis around central veins were found to be protective. The elevated levels of plasma ALT, AST, and LDH, the ALP activation lipid peroxidation, and the lipid contents of a damaged liver were recovered in experimental rats administrated with S. libertina extract, suggesting its role in blood enzyme activation and lipid content restoration within damaged rat liver tissues. Moreover, the expression rate of TNF-α, which accelerates inflammation and induces tissue damage and necrosis, was significantly decreased. In addition, the activities of antioxidant enzymes were more effectively upregulated compared to those of the control group induced hepatotoxicity. All data showed that S. libertina extract has a preventive role against liver damages, such as inflammation and tissue necrosis, as instigated with D-galactosamine by improving the activities of blood enzymes and antioxidant enzymes and modulating the expression of inflammation factor, suggest S. libertina extract is an effective medicinal resource for the restoration of hepatotoxicity.
Journal of the korean academy of Pediatric Dentistry
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v.34
no.1
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pp.162-168
/
2007
Impaction of the maxillary central incisor may cause social, esthetic, and functional problems in children. There are various means of treatment for the inverted maxillary central incisor, such as extraction, surgical opening followed by orthodontic traction surgical repositioning or intra-alveolar autotransplantation prior to extraction. In this case, we surgically repositioned the inverted maxillary central incisor to normal semi-erupted position in a 5-year-old boy The developmental stage of the inverted tooth was Nolla's 6.5, which indicates formation of less than one third of the root. After surgical reposition, we did follow-up for 21 months, expecting spontaneous growth Unfortunately, poor prognosis was noted further root was not observed. Such failure seems to originate from possible injury on Hertwig's epithelial root sheath by surgical trauma. We performed surgical repositioning to retain the tooth instead of extraction. However, arrest of root development occurred which is one of the critical complications. In order to increase the success rate of the surgical reposition procedure, minimal surgical trauma is required as well as selection of adequate indication and decision of proper time of treatment considering the stage of root development.
The radioprotective effects of Melatonin and Ge-132 on acute hematopoietic injury was investigated in mice exposed to an acute whole-body radiation dose of 8 Gy. Melatonin was administered intraperitoneally 1 hour before irradiation at a dose of 200 mg/kg, and Ge-132 was administered orally from days 5 to 20 after irradiation at a dose 130 - 150 mg/kg/d. The radioprotective effects were evaluated for spleen using TUNEL assay, and in peripheral blood by counting lymphocyte & WBC. The 4 experimental groups (irradiation-only, melatonin pretreatment, Ge-132 posttreatment, and melatonin pretreatment plus Ge-132 posttreatment) were observed for survival analysis up to 30 days following irradiation. The apoptotic index (47.8% vs 45.9%, p=0.385), and the number of lymphocytes ($97/{\mu}{\ell}\;vs\;101/{\mu}{\ell}$, p=0.898) were not significantly different between the irradiation-only and the melatonin pretreatment group, But the number of WBCs ($147/{\mu}{\ell}\;vs\;306/{\mu}{\ell}$, p=0.010) was higher in the melatonin pretreatment group. The irradiation-only, melatonin, Ge-132, and melatonin plus Ge-132 treatments resulted in survival rate at 30 days of 21.4%, 100%, 35.7%, and 85.7%, respectively. The melatonin pretreatment group in survival analysis between groups was showed significantly higher survival than the irradiation-only(p=0.000), or Ge-132 posttreatment group(p=0.0003). These results indicate that the melatonin may have a potential as an effective radioprotector on acute hematopoietic syndrome following radiation exposure.
The purpose of this study is estimate limits of Korean life expectancy at birth by 'Gompertz growth curse Model', 'Cause-Elimination Model' and Multidimensional models of Senescencee and Mortality'. Data used in Gompertz curve were obtained from all life tables published from 1905 to 1990 in Korea, and life expectancies at birth of eighteen groups were selected at five-year interval in consideration of time-series changes. Data used in Cause-Elimination Model are 'Cause of Death statistics in 1991' published in 1992 by National Bureau of Statistics of Korea and 'life table of 1989' published in 1990 by National Bureau of Statistics, Economic Planning Board of Korea. The materials are all classifiable death data, 119, 253 cases of male and 82, 420 cases of female, which is from 1991 Causes of Death statistics. The cases of death analyzed belong to one of 8 categories; i.e., Infectious and Parasitic Diseases(001-139; with notation of Infectious Diseases), Malignant Neoplasms(140-208), Hypertensive Diseases(401-405), Ischemic Heart Dieases and Diseases of Pulmonary Circulation and Other Forms of Heart Diseases(410-429;with notation of Heart Disease), Cerebrovascular Diseases(430-438), Chronic Liver Diseases and Cirrhosis(571; with notation of Liver Diseases), Injury and Poisoning(800-999) and all other disease. Data used in 'Multidimensional models of senescence and mortality' were life table of 1989 published by National Bureau of statistics, Economic Planning Board of Korea and life table of 1970, 1978-79, 1983, 1985 and 1987. The major findings may be summarised as follows: 1. Estimate equations of Gompertz growth curve using life expectancy at birth during the 1905-1990 period are as the following. Male : y = 88.047697 $\times$$0.199690^{0.903381x}$ Female : y = 95.632828 $\times$$0.199690^{0.903381x}$ Limits of life expectancy at birth, which were estimated by Gompertz growth curve, are 88.05 for male and 95.63 for female. 2. The effect on life expectancy at birth eliminationg all causes death is 14.04 years(for male) and 10.86 years(for female). Astonishingly, eliminating the malignant neoplasms increase life expectancy at birth by 2.85 years for male 2.03 years for female in 1991. In table 8 we show the effect on life expectancy at birth of separately eliminating each of the 8 categorical causes of death. The theoretical limit to life expectancy by Cause-Elimination Model is 80.96 for male and 85.82 for female. 3. If the same rate of delay [0.376 year(male), 0.435 year(femable) per calendar year] continued, then life expectancy at birth would reach 74.82(male) years and 84, 10(female) years in 2010. With 14.04-years(male) and 10.86-years(female) effect attributable in 2010 would be 88.86 years(male) and 94.96(femable) years. 4. 'Multidimensional models of senescence and death' permits calculations of the value of the attribution coefficient (B), percent of loss per year of physiologic function. The results of Ro and B during the 1970-1989 period are listed in table 9. Estimate of limit to Korean life expectancy at birth by 'Multidimensional models of senescence and death' is 99.47 years for male and 104.74 years for female in 1989.
Lee, Young-Sun;Yi, Hyon-Seung;Suh, Yang-Gun;Byun, Jin-Seok;Eun, Hyuk Soo;Kim, So Yeon;Seo, Wonhyo;Jeong, Jong-Min;Choi, Won-Mook;Kim, Myung-Ho;Kim, Ji Hoon;Park, Keun-Gyu;Jeong, Won-Il
Molecules and Cells
/
v.38
no.11
/
pp.998-1006
/
2015
Retinols are metabolized into retinoic acids by alcohol dehydrogenase (ADH) and retinaldehyde dehydrogenase (Raldh). However, their roles have yet to be clarified in hepatitis despite enriched retinols in hepatic stellate cells (HSCs). Therefore, we investigated the effects of retinols on Concanavalin A (Con A)-mediated hepatitis. Con A was injected into wild type (WT), Raldh1 knockout ($Raldh1^{-/-}$), $CCL2^{-/-}$ and $CCR2^{-/-}$ mice. For migration study of regulatory T cells (Tregs), we used in vivo and ex vivo adoptive transfer systems. Blockade of retinol metabolism in mice given 4-methylpyrazole, an inhibitor of ADH, and ablated Raldh1 gene manifested increased migration of Tregs, eventually protected against Con A-mediated hepatitis by decreasing interferon-${\gamma}$ in T cells. Moreover, interferon-${\gamma}$ treatment increased the expression of ADH3 and Raldh1, but it suppressed that of CCL2 and IL-6 in HSCs. However, the expression of CCL2 and IL-6 was inversely increased upon the pharmacologic or genetic ablation of ADH3 and Raldh1 in HSCs. Indeed, IL-6 treatment increased CCR2 expression of Tregs. In migration assay, ablated CCR2 in Tregs showed reduced migration to HSCs. In adoptive transfer of Tregs in vivo and ex vivo, Raldh1-deficient mice showed more increased migration of Tregs than WT mice. Furthermore, inhibited retinol metabolism increased survival rate (75%) compared with that of the controls (25%) in Con A-induced hepatitis. These results suggest that blockade of retinol metabolism protects against acute liver injury by increased Treg migration, and it may represent a novel therapeutic strategy to control T cell-mediated acute hepatitis.
Park, Young Mi;Kim, Jin Ah;Kim, Chang Heon;Lim, Jae Hwan;Seo, Eul Won
Korean Journal of Plant Resources
/
v.28
no.5
/
pp.551-560
/
2015
Here we report the protective activity of cultured Acer tegmentosum cell extract against liver damage in rat intentionally instigated by D-galactosamine. Local fat degeneration and infiltration of inflammatory cells were significantly decreased in cultured A. tegmentosum cell extract administered rat. In addition, acutely increased AST, ALT, LDH, ALP activities and lipid peroxidation and lipid content by liver damage were recovered in experimental rat administrated with A. tegmentosum extract. These results showed that cultured A. tegmentosum cell extract has a role in blood enzyme activation and lipid content restoration within damaged rat liver tissues. Moreover expression rate of TNF-α which accelerates inflammation and induces tissue damage and necrosis was significantly decreased. Also activities of antioxidant enzymes were more effectively upregulated comparing to those of the control group induced hepatotoxicity. All data that cultured A. tegmentosum cell extract has a preventive role against liver damages such as inflammation, tissue necrosis in rats by improving activities of blood enzymes, antioxidant enzymes and modulating expression of inflammation factor, suggest that cultured Acer tegmentosum cell extract is an effective medicinal resource for restoration of hepatotoxicity.
Journal of the Korean Society of Food Science and Nutrition
/
v.35
no.8
/
pp.1010-1015
/
2006
p-Pheylenediamimine (PPD) is one of hair dye's ingredients, and the mixture of PPD with hydrogen peroxide is generally used to dye hair at beauty shop. This study is conducted to investigate the effect of oxidized PPD on rat skin. 6% hydrogen peroxide, PPD (5% PPD in 2% $NH_4OH$) or the mixture (isovolumed mixture of 5% PPD and 6% hydrogen peroxide in 2% $NH_4OH$) was applied to rat skin ($25\;mg/16.5\;cm^2$) five times every other day. The activity of acid phosphatase (ACP) was more increased in the mixture of PPD with hydrogen peroxide applied group than PPD applied group. Furthermore, the activity of glucose 6-phosphatase (G6Pase) in the mixture of PPD with hydrogen peroxide applied group showed higher decreasing rate than that of PPD applied group. In histopathological findings, the mixed PPD with hydrogen peroxide applied group showed more thickening of epithelium, increased numbers of dermal fibroblasts, and the dilatation of dermal capillaries than PPD applied group. The significant increasing of xanthine oxidase (XO) activity was determined in mixture of PPD with hydrogen peroxide applied group compared with PPD applied group. However, reactive oxygen species (ROS) scavenging system, the activities of superoxide dismutase (SOD) and glutathione S-transferase (GST) were more significantly decreased in mixed PPD with hydrogen peroxide applied groups than in PPD applied group. In conclusion, topical application with the mixture of PPD with hydrogen peroxide compared with PPD application resulted in imbalance with ROS generating and scavenging which probably led to severe skin injury.
Lee, Kyung Hae;Shin, Kyung Min;Lee, Hyeon Jeong;Kim, So Young;Chae, Jung Won;Kim, Mi Ra;Han, Min Young;Ahn, Mi Sook;Park, Jin Kyung;Chung, Mi Ae;Chu, Sang Hui;Hwang, Jung Hwa
Journal of Korean Clinical Nursing Research
/
v.23
no.1
/
pp.83-90
/
2017
Purpose: This study was to develop evidence-based clinical practice guideline in order to prevent contrastinduced nephropathy (CIN) for patients undergoing percutaneous coronary intervention (PCI). Methods: The guideline was developed based on the "Scottish Intercollegiate Guidelines Network (SIGN)". The first draft of guideline was developed through 5 stages and evaluated by 10 experts.(1) Clinical questions were ensured in PICO format.(2) Two researchers conducted a systematic search through electronic database, identifying 170 studies. We selected 27 full text articles including 16 randomized clinical trials, 7 systematic reviews, and 4 guidelines. Quality of each studies were evaluated by the Cochran's Risk of Bias, AMSTAR, K-AGREEII. Among the studies, 11 studies were excluded.(3) The strength of recommendations were classified and quality of recommendations were ranked.(4) Guideline draft was finalized.(5) Content-validation was conducted by an expert group. All contents were ranked above 0.8 in CVI. Results: Evidence-based clinical practice guideline to prevent CIN was dveloped.(1) The guideline for preventing CIN recommends using 0.9% saline.(2) Standardized rate of fluid therapy is 1 to 1.5ml/kg/hr.(3) Execute hydration for 6~12hrs before PCI and after PCI. Conclusion: This study suggests evidence-based clinical practice guideline for preventing CIN which can be more efficiently used in clinical practice.
Seo, Seok-Ran;Ryu, Sung-HunO;Oh, Gwi-Ok;Kim, Hyung-Seop
Journal of Periodontal and Implant Science
/
v.30
no.4
/
pp.895-913
/
2000
It is becoming increasingly clear that human gingival fibroblasts(HGF) may play a role in regulating immune responsiveness in inflammatory periodontal lesions. Stimulation of HGF with locally-secreted T cell cytokine $IFN_{\gamma}$ induces human leukocyte antigen class II(HLA II) expression on HGF, which is one of the characteristic feature of professional antigen presenting cells(pAPC). However, $IFN_{\gamma}$-treated HGF and other nonprofessional antigen presenting cells(npAPC) are known to be ineffective or less effective antigen presenter to resting T cells. This study, therefore, was undertaken in an effort to elucidate the differences in expression of cell surface molecules between npAPC in periodontal tissues, such as HGF and periodontal ligament fibroblasts(PDLF), and pAPC such as monocytes/macrophages. Using flow cytometry, the levels of cell surface expression of HLA-D, ICAM-1, LFA-3, and B7-1, which are involved in antigen presentation, were determined in HGF, PDLF and human myelomonocytic cell line THP-1. $IFN_{\gamma}$ clearly induced HLA-D expression on both of fibroblasts and monocytes dose dependently. However, expression level on monocytes were 4 to 5 times higher than that on fibroblasts, and induction rate was faster in monocytes than in fibroblasts. The levels of ICAM-1 expression on fibroblasts and monocytes were enhanced by $IFN_{\gamma}$ in a dose dependent manner. On the other hand, the expression of LFA-3 molecule, which could be detected in fibroblasts and monocytes without cytokine stimulation, was no more enhanced by addition of $IFN_{\gamma}$. B7-1, important costimulatory molecule in T cell activation and proliferation, was not detected on both of fibroblasts and monocytes even when stimulated with $IFN_{\gamma}$, except on monocytes fully differentiated by pretreatment of PMA and treated by $IFN_{\gamma}$. These results suggest that delayed expression of HLA-D and absence of B7-1 on $IFN_{\gamma}$ - treated fibroblasts may at least in part be involved in the ineffectiveness of fibroblasts as primary APC. And it is postulated that although periodontal fibroblasts may not serve as primary APC in normal periodontium, sustained expression of HLA II on ubiquitous fibroblasts in inflammatory lesions may perpetuate immune responses and produce chronic inflammation and tissue injury.
This study was conducted to investigate the bionomics, host range and damage aspect of Japanese juniperus bark borer, Semanotus bifasciatus M., which shoves the severe damage for the Juniperace in Chonnam province, recently. Host plants were Juniperus virginiana, J. chinensis var. kaizuka, J. chinensis, Biata orientalis var. nepalensis, Chamaccyparis ostus and Thujopsis dolabrata. Out of those, J. chinensis var. kaizuka is newly investigated in this study. Damage rate in each area was $16.5\%$ in Kwangju, $4.25\%$ in Damyang ana $6.5\%$ in Hwasoon. Adults appear once a year, with a peak at late March to early April. Adults emergence during the day showed the peak at 13 to 15 hours and were influenced in the maximum temperature in a day. Attack direction of larva after invasion in the stem was $62\%$ toward base, $22\%$ toward tip and $16\%$ toward horizon, and the damage in each DBH (Diameter of breast height) was the greatest at $30\~40mm$. At period of each stage, egg was $15.8\~19.7$ days, larva was $l12\~126$ days and pupa was $15\~21$ days. Longevity of adult was 19 days for female and 16 days for male.
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