• Journal of Periodontal and Implant Science
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• v.48 no.2
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• pp.92-102
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• 2018

Purpose: This study investigated the validity of the Charlson comorbidity index (CCI) as a predictor of periodontal disease (PD) over a 12-year period. Methods: Nationwide representative samples of 149,785 adults aged ${\geq}60$ years with PD (International Classification of Disease, 10th revision [ICD-10], K052-K056) were derived from the National Health Insurance Service-Elderly Cohort during 2002-2013. The degree of comorbidity was measured using the CCI (grade 0-6), including 17 diseases weighted on the basis of their association with mortality, and data were analyzed using multivariate Cox proportional-hazards regression in order to investigate the associations of comorbid diseases (CDs) with PD. Results: The multivariate Cox regression analysis with adjustment for sociodemographic factors (sex, age, household income, insurance status, residence area, and health status) and CDs (acute myocardial infarction, congestive heart failure, peripheral vascular disease, cerebral vascular accident, dementia, pulmonary disease, connective tissue disorders, peptic ulcer, liver disease, diabetes, diabetes complications, paraplegia, renal disease, cancer, metastatic cancer, severe liver disease, and human immunodeficiency virus [HIV]) showed that the CCI in elderly comorbid participants was significantly and positively correlated with the presence of PD (grade 1: hazard ratio [HR], 1.11; P<0.001; grade ${\geq}2$: HR, 1.12, P<0.001). Conclusions: We demonstrated that a higher CCI was a significant predictor of greater risk for PD in the South Korean elderly population.

• Korean Journal of Clinical Laboratory Science
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• v.50 no.4
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• pp.391-398
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• 2018

Mesenchymal stem cells (MSCs) are an attractive resource for refractory patients because of their anti-inflammatory/immunomodulatory capability and multi-lineage differentiation potential. The transplantation of MSCs has led to positive results in preclinical and clinical application to various diseases, including autoimmune disease, cardiovascular disease, cancer, liver cirrhosis, and ischemic stroke. On the other hand, studies have shown that paracrine factors, not direct cell replacement for damaged cells or tissue, are the main contributors in MSC-based therapy. More recently, evidence has indicated that MSC-derived exosomes play crucial roles in regulating the paracrine factors that can mediate tissue regeneration via transferring nucleic acids, proteins, and lipids to the local microenvironment and cell-to-cell communication. The use of these exosomes is likely to be beneficial for the therapeutic application of MSCs because their use can avoid harmful effects, such as tumor formation involved in cell transplantation. Therefore, therapeutic applications using MSC-derived exosomes might be safe and efficient strategies for regenerative medicine and tissue engineering. This review summarizes the recent advances and provides a comprehensive understanding of the role of MSC-derived exosomes as a therapeutic agent.

• The Korean Journal of Pharmacology
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• v.32 no.3
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• pp.399-406
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• 1996

Thioacetamide is a non-genotoxic carcinogen, a protein modifying agent. It causes nucleolar hypertrophy in short term treatment. In the present work, thioacetamide treated hepatocytes were observed in vivo and in vitro conditions. After 7 day treatment of rat liver with thioacetamide, the hepatocyte nucleoli were enlarged and their signalling molecules such as B23 and p38 MAPK were increased. When these hepatocytes were released by collagenases and were grown under the conditions of gene therapy grade tissue culture system, the enlarged nucleoli were further enlarged. The B23 content was again increased under in vitro conditions. From these experiments, it is clear that the hepatocytes possess approximately 100 fold flexibility of nucleolar capacity. It is suggested that thioacetamide enhances the ribosome genesis and exaggerates the nucleologenesis ability.

• Journal of Korean Society of Occupational and Environmental Hygiene
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• v.17 no.3
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• pp.181-191
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• 2007

With the 2-Butanethiol, which is an unidentified inhalation toxic material, acute inhalation toxicity was tested with SD rats. The $LC_{50}$ was evaluated to be 2,500 ppm (9.22 mg/L) or higher which falls under the criteria of acute toxicity Category 3 (500<$LC_{50}$<2,500 ppm) in the Industrial Safety and Health Act. In the subchronical inhalation toxicity test by 0, 25, 100, and 400 ppm, 6 hours a day, 5 days a week, for 13 weeks repeated exposure, though no death or particular clinical presentation was observed, in the female 25 and 400 ppm group, including weight change, and in each concentration group including 400 ppm, change of feed rate, eye stimulation, motility change in male group, and lesions in blood and blood biochemical were observed. In the internal organs weight, 25, 100, and 400 ppm groups in male and 400 ppm group in female showed significant (p<0.05) changes in kidney, liver, thymus, and lung. In the pathological tissue test, severe cortical tubular hyaline droplets were observed in the male 400 ppm group, and all male rats of 400 ppm group and 2 female individuals showed tubular degeneration/regeneration accompanied with pigmentation, showing that the target organs of inhalation exposure of 2-Butanethiol are spleen, kidney, nasal cavity, and adrenal. Through the tests, the NOEL of 2-Butanethiol was evaluated to be 25 ppm (0.092 mg/L) or less for both male and female.

• The Journal of Pediatrics of Korean Medicine
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• v.20 no.1
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• pp.165-180
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• 2006

Objective : This study has been carried out to understand the effect of several herbal medicine concentrated solution on the hyperglycemic mice Induced with streptozotocin(STZ). Methods : The 60 mg/kg of STZ injection into mice twice by 24 h interval and then 120 mg/kg of STZ injection again 3 days after the earlier injection. Control group was subjected to natural recovery, however, treated groups were fed 0.2 ml of several herbal medicine-concentrated solution (PA (x2, several herbal medicine-concentrated solution 1 group); PB (x4 several herbal medicine-concentrated solution 2 group) daily for 6 weeks. Result : The weight of PA was higher than that of control, but weight of PB was lower than control. The blood level of control increased continuously, reaching to 350mg/dL after 6 weeks, however, PA and PB showed a fast reduction of blood glucose. In blood glucose tolerance test, PA and PB showed better resistance than control. The GOT level in significantly(p<0.05) decreased in PA and PB compared with control group. The BUN and creatinine levels are significantly(p<0.01) decreased in PA compared with control group. Feeding of several herbal medicine-concentrated solution in a concentration of PA had an efficient effect on regeneration or recovery of Langerhans islet and ${\beta}-cell$ damaged by STZ. More Langerhans islet and high insulin-immunohistochemical resistance were observed in PA compared with control, but they were higher in PB than in PA. The number of Langerhans islet ${\beta}-cell$ and Langerhans islet. Conclusions : The result from the six weeks of observation demonstrates that the several herbal medicine concentrated solution have a positive effect of lowering the level of blood sugar and they increased insulin concentration. They have an effect for recovery of pancreas tissue and recovery of kidney, liver function from a diabetes mellitus.

• Journal of Haehwa Medicine
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• v.10 no.1
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• pp.67-78
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• 2001

From the study of acupuncture and external diseases on mammary diseases, the following conclusions are obtained. 1. Point Shanzhong, Shaoze and Rugen are often used for galactostasis in acupuncture. 2. Often used vessels for galactostasis in acupuncture are Stomach Meridian, Conception Vessel, Small Intestine Meridian, Bladder Meridian, Liver Meridian and Large Intestine Meridian in order. 3. The direct stimulations are used in external treatment for galactostasis, often accompanied by internal medical treatment, to promote the circulation of Qi and Blood. 4. Point Zuimup, Guangming of Gall bladder Meridian and Zusanli of Stomach Meridian is used for lactation pain in acupuncture. 5. Point Jianjing, Zusanli and Shanzhong are most often used for acuremastitis and breast cancer in acupuncture. 6. Often used vessels for acuremastitis and breast cancer in acupuncture are Stomach Meridian, Gall bladder Meridian, Conception Vessel, Small Intestine Meridian, Bladder Meridian, Pericardium Meridian in order. 7. The external treatment used for acuremastitis and breast cancer can be classed into its pathological period. When lactation is interrupted, Kumhwang Powder, Okro Powder, Robongbang, Allii Radix, Pinelliae Rhizoma, garlic moxibustion and Arusaenatus Rgizoma powder are used. When pus is piled up, Chunghwa Extracts, Dioscoreae Rhizoma, Leonuri Herba, Typa Latifolia, Taraxacum platycarpum, Phaseolus angularis, Manchong, Crvi Cornus latex, and Aucklandiae Radix are used. When pus flows down, Salviae Miltiorrhizae Radix Extract, nine-one pellet, Yongboo extract, eight-dampness extract, Tissue-regeneration Powder, Toad-net treatment, Kitten-hair, Hongseung pellet are used. 8. Stomach Meridian, Conception Vessel, Small Intestine Meridian, Gall Bladder Meridian, Bladder Meridian are most often used vessels for mammary diseases. From the conclusions above, It appears that the medical effect could be maximized by further studying and developing of the acupuncture and external treatment for mammary diseases according to the its nature, while accompanying internal medicine appropriately at the same time.

• The Korean Journal of Cytopathology
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• v.1 no.1
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• pp.1-17
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• 1990

Hepatocellular carcinoma (HCC) is malignant tumor frequently occurring in Koreans. There have been few reports regarding the cytologic findings of fine needle aspiration (FNA) of HCC. Most have suggested a diagnostic problem in the cytology distinguishing HCC from some benign hepatic lesions-for example, a regeneration nodule in cirrhosis and liver cell adenoma. In spite of its high frequency in Korea, no cytologic study has been reported, concerning the FNA of HCC. In an attempt to achieve cytologic criteria for the diagnosis of HCC, the authors studied retrospectively cytopathologic findings of 247 cases of HCC. These cases were confirmed either by histoiogic examination including lobectomy, biopsy, or ceil block material, or, when tissue diagnosis was unavailable, by a high serum alpha-fetoprotein level (over 400 I. U.). All aspiration smears were stained by the Papanicolaou method. In each case, the smears were analyzed for cell patterns and various cytomorphology of the tumor cells. The smear background was assessed for the presence of tumor cell necrosis and inflammatory components and compared to that of metastatic carcinomas. The cell patterns were classified as trabecular, acinar, dispersed, and irregular. The cytologic parameters analyzed included the degree of nuclear atypia and the presence of mitoses, intranuclear cytoplasmic inclusions, nucleolar prominency, endothelial lining, multinucleated giant cells, eosinophiic globules, bile, and Mallory body. Most of the FNA of HCC showed markedly cellular smears. The tumor cells were most frequently arranged in a trabecular pattern (80.3%). The irregular (12.6%), the acinar (5.5%), and the dispersed patterns (1.7%) followed in decreasing frequency. Individual hepatoma cells were larger than normal liver cells. However, they had morphologic features characteristic of the hepatic cells the cells were round or polygonal, their cytoplasm was abundant and granular with eosinophilic or amphophilic stainability, and their nuclei were round to oval, located centrally, and tended to have prominent nucleoli. Anaplasia and pleomorphism of tumor cells were generally mild to moderate. These findings existed even in very well differentiated cases. Mitotic figures were present in about 85% of the cases. Prominent nucleoli were observed only in about half the cases. The frequency of other cytologic features was as follows intranuclear cytoplasmic inclusion in 86.8% : endothelial lining in 56.1% : bile in 19.8% : and giant cells in 60.1%. Clear cells were often present in 11.7%, Most aspiration smears of HCC displayed clean background without necrosis or inflammatory material in contrast to the dirty, necrotic background of metastatic cancers and cholangiocarcinomas. Based on the above mentioned features, it is suqqested that the cytologic critieria most important for the diagnosis of HCC include a markedly cellular smear, trabecular pattern, hepatocytoid appearance of tumor cells, endothelial lining, the presence of bile, giant cells, intranuclear cytoplasmic inclusions, and prominent nucleoli, Among these, trabecular pattern, endothelial lining, giant cells and clean smear background are points to be considered in differentiating HCC from metastatic and cholangiocellular carcinoma.