Topoisomerases are essential enzymes involved in all processes of DNA metabolism, and their inhibitors have been identified as potential anti-cancer agents. The present study examined the effect of linoelaidic acid (C18 polyunsaturated fatty) compounds derived from Gardenia jasminoids Ellis extract on the activity of eukaryotic topoisomerases inhibition. The present study identified linoelaidic acid compounds using open column fraction, HPLC, NMR and LC/MS which have effects on cell death in oral cancer cell line, FaDu, but not in immortalized normal cell line, HaCaT. Subsequent studies revealed linoelaidic acid-induced autophagy through LC3 activation. Finally, its inhibition of topoisomerase I and selectively induction of oral cancer cell death possibly implies that linoelaidic acid can be a role as potenial agents in the prevention and therapy of oral cancer.
Peri-implantitis (PI) is bacteria-induced inflammatory condition which affects the alveolar bone and soft tissue around implants and may result in the loss of supporting bone. Attenuation of the P. gingivalis lipopolysaccharide (LPS)-induced inflammatory response can be a new therapeutic approach in the treatment of PI. This study was conducted to evaluate the anti-inflammatory effect of 635-nm light-emitting diode (LED) irradiation over MG63 osteoblast-like cell. Scratch was made on MG63 cells with or without LPS, then 635-nm irradiated. The expression of the cyclooxygenase-2 (COX-2) proteins was evaluated with western blot. The production of the prostaglandin E2 (PGE2) and expression of the receptor activator of nuclear factor kappa-B ligand (RANKL) and osteoprotegerin (OPG) was measured with enzyme-linked immunoassay, and the cytokine profile was evaluated with the human inflammation antibody array. Wound closure effect presented in the cells treated with LPS was observed more significantly in the cells with 635-nm irradiation than the cells without irradiation. The 635-nm irradiaiton reduced LPS-induced expression of the COX-2 and production of the PGE2. Also, 635-nm irradiation affect the expression of RANKL, OPG, and proinflammatory cytokines. These results indicate that 635-nm irradiation could reduce the alveolar bone resorption induced by LPS stimulation through the inhibition of COX-2 expression and PGE2 production, the suppression of proinflammatory cytokine, and the modulation of RANKL/OPG balance in MG63 cells.
The purpose of this research was to provide basic data for managing players by determining the relation between the social support within the Taekwondo team in secondary schools and the burnout of players. The population to achieve this research purpose was the Taekwondo players of secondary schools in the Daejeon, Chungnam region registered as players in Korea Taekwondo Association as of 2010. For the sampling method, the convenience sampling, that was the non-probability sampling, was used, and the final analysis to obtain the results used a total of 222 persons’ data. As the method of statistical analysis for data processing, the multiple regression analysis were conducted. The proof of hypotheses was conducted at the significance level of α=.05, and the results are as follows. First, only the emotional support among the social support factors was found to have statistically significant negative(–) effects on the emotional exhaustion. However, the informative support, instrumental support, and evaluating support were found to have no statistically significant effects on emotional exhaustion. Second, the instrumental support and evaluating support among the social support factors were found to have statistically significant negative(–) effects on depersonalization. However, the informative support and emotional support were found to have no statistically significant effects on depersonalization. Third, only the evaluating support among the social support factors was found to have statistically significant negative(–) effects on the decline in the sense of accomplishment. However, the informative support, emotional support, and instrumental support were found to have no statistically significant effects on the decline in the sense of accomplishment.
Sparganosis is a rare parasitic disease caused by the infection of plerocercoid tapeworm larvae of the genus Spirometra. Up to date many cases of oral sparganosis had been diagnosed from biopsy specimens in Korea, however, in this study a 14 years old male showed an oral sparganosis in his buccal nodule producing its eggs, which were extruded through the ulcerated surface of buccal nodule. In the cytological observation for the pus‐like exudates many ovoid parasite eggs were found with a lot of inflammatory cells, which were mostly composed of eosinophilic polymorphonuclear leukocytes (PMNs). The eggs were measured about 50x50x80 μm, and had an operculum without opercular shoulder. In the subsequent biopsy examination the buccal nodule disclosed a diffuse granulomatous lesion with tunnel‐like spaces containing eosinophilic materials of parasite tegument, also infiltrated with a lot of eosinophilic PMNs. Therefore, we diagnosed it oral sparganosis producing its eggs with the characteristic features of sparganum granuloma in the cytological and histological observations, and also suggested that the cytological finding of parasitic eggs would be helpful to confirm the parasitic infection of sparganum matured enough to produce its eggs.
The ossifying fibroma (OF), with the microscopic features of trabuclae or spherules of bone or cementum-like material in a cellular fibrous connective tissue stroma, is one of the most common benign fibro-osseous lesions in the jaw bones. The OF often occurs in patients from 20 to 40 years of age, which is a definite female predilection. The mandibles are involved far more often than the maxillas, especially the pre-molar and molar regions. It is slow-growing, bone producing, asymptomatic and well-demarcated. The OF is a disorder of odontogenesis or osteogenesis ascribed to bone marrow stroma cells (BMSCs) abnormality. However, the detailed mechanisms of OF’s oncogenesis, cytodifferentiation, and tumor progression remain unknown. In this article, we reported a huge central OF on the anterior mandible. The lesion was enucleated and peripheral ostectomy was done via intraoral approach and reconstructed with vascularized iliac block bone graft. After 25 months of follow up, the tumor had not recurred. This case shows that OF may be successfully treated by conservative surgical enucleation and peripheral ostectomy.
Malignant tumor of the paranasal sinus is a rare, occurring most frequently in the maxillary sinus. Carcinomas of the maxillary sinus are usually diagnosed at the advanced stage because most tumors have no symptom or nonspecific symptoms such as pain, nasal obstruction, rhinorrhea, and epistaxis. In addition to these features, it is difficult to distinguish carcinoma from inflammatory or cystic lesion on imaging study until the carcinoma destroys the surrounding structures. Therefore, the diagnosis is prone to be delayed. Here, we report a case of an 83‐year‐old male with nonkeratinizing carcinoma on the maxillary sinus, which was initially misdiagnosed as a cystic lesion. The aim of this study is to emphasize the effort for early diagnosis in order to improve prognosis and avoid inadequate treatment