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Expression Pattern of Immunoproteasome Subunits in Human Thymus
오권익,서재남 대한면역학회 2009 Immune Network Vol.9 No.6
The expression pattern of immunoproteasomes in human thymus has not been analyzed but may have important consequences during thymic selection. Here we examined the expression patterns of immunoproteasome subunits in fetal and adult thymic tissues by immunohistochemistry and found that all three subunits are expressed in both cortical and medullary stromal cells. These data suggest that thymic selection in human can be affected by peptide repertoires generated by immunoproteasomes. The expression pattern of immunoproteasomes in human thymus has not been analyzed but may have important consequences during thymic selection. Here we examined the expression patterns of immunoproteasome subunits in fetal and adult thymic tissues by immunohistochemistry and found that all three subunits are expressed in both cortical and medullary stromal cells. These data suggest that thymic selection in human can be affected by peptide repertoires generated by immunoproteasomes.
정경천,서재남,김태운,최영미,오권익,송헌호,신형식,박영의 대한병리학회 2004 Journal of Pathology and Translational Medicine Vol.38 No.6
Background : CD24, also referred to as the heat stable antigen in mice, is a glycosyl phosphatidylinositol-linked glycoprotein expressed by thymocytes, B cells, neutrophils and immature neuronal cells. It has been recently observed in a variety of human malignancy. Here, we demonstrated the expression of CD24 in gastric adenocarcinomas. Methods : A total of 40 gastric adenocarcinomas and 20 tubular adenomas were immunohistochemically examined for the expression of CD24 and matrix metalloproteinase-2 (MMP-2) proteins. The immunoreactivity of CD24 was semiquantitatively scored (0, 1+, 2+) and compared with clinicopathologic variables and MMP-2 expression in tumor cells. Results : CD24 was rarely expressed in normal gastric tissue and not expressed in tubular adenoma. In contrast, a moderate/strong expression (2+) of CD24 was observed in 25% of gastric adenocarcinomas, and 30% cases showed a weak CD24 staining (1+). Moreover, CD24 expression was significantly correlated with the depth of tumor invasion and MMP-2 expression. Conclusions : These results suggest that the aberrant expression of CD24 in gastric adenocarcinomas might be associated with tumor progression and invasiveness.
금창구,서재석,남진경,이은주,조정원 충남대학교 약학대학 의약품개발연구소 2010 藥學論文集 Vol.25 No.-
Paclitaxel (PTX) is an anti-cancer agent extracted from the bark of the Pacific yew (Taxus brevifolia). In clinical trials, PTX has demonstrated significant activity against a variety of tumors such as drug-resistant ovarian cancer, metastatic breast cancer, non-small cell lung cancer and AIDS related Kaposi's sarcoma. However, the bioavailability of PTX is mainly limited by cytochrome P450 activity in gut wall and liver, and drug transporters, such as P-gp in gut wall and liver. As well as, PTX is very poor soluble in water (<0.5 mg/L) and other pharmaceutically acceptable solvents. The commercial formulation of PTX consists of micellar solution of the drug in cremophor EL (polyoxyethylated castor oil) containing 50% absolute ethanol. However, it is well known that the use of cremophor EL is associated with hypersensitivity reactions, neurotoxicity and nephrotoxicity and also the solubility of PTX is increasing with the addition of citric acid. Therefore, this study is to optimize the mixing order of individual components for stabilized paclitaxel injection.