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Articles by S. Y. Park
Total Records ( 3 ) for S. Y. Park
  H. K Sung , Y. W Kim , S. J Choi , J. Y Kim , K. H Jeune , K. C Won , J. K Kim , G. Y Koh and S. Y. Park

To test whether chronic enhanced blood flow alters insulin-stimulated glucose uptake, we measured skeletal muscle glucose uptake in chow-fed and high-fat-fed mice injected with adenovirus containing modified angiopoietin-1, COMP-Ang1, via euglycemic-hyperinsulinemic clamp. Blood flow rates and platelet endothelial cell adhesion molecule-1 positive endothelial cells in the hindlimb skeletal muscle were elevated in COMP-Ang1 compared with control LacZ. Whole body glucose uptake and whole body glycogen/lipid synthesis were elevated in COMP-Ang1 compared with LacZ in chow diet. High-fat diet significantly reduced whole body glucose uptake and whole body glycolysis in LacZ mice, whereas high-fat-fed COMP-Ang1 showed a level of whole body glucose uptake that was comparable with chow-fed LacZ and showed increased glucose uptake compared with high-fat-fed LacZ. Glucose uptake and glycolysis in gastrocnemius muscle of chow-fed COMP-Ang1 were increased compared with chow-fed LacZ. High-fat diet-induced whole body insulin resistance in the LacZ was mostly due to ~40% decrease in insulin-stimulated glucose uptake in skeletal muscle. In contrast, COMP-Ang1 prevented diet-induced skeletal muscle insulin resistance compared with high-fat-fed LacZ. Akt phosphorylation in skeletal muscle was increased in COMP-Ang1 compared with LacZ in both chow-fed and high-fat-fed groups. These results suggest that increased blood flow by COMP-Ang1 increases insulin-stimulated glucose uptake and prevents high-fat diet-induced insulin resistance in skeletal muscle.

  M. C Lim , S. S Seo , S Kang , M. W Seong , B. Y Lee and S. Y. Park

We investigate the frequency of hereditary non-polyposis colorectal cancer among Korean endometrial cancer patients according to two clinical criteria and the uptake rate of a genetic test and genetic status of such patients in routine clinical practice.


This was a retrospective study involving 161 consecutive endometrial cancer patients. Patients were classified into clinical and suspected hereditary non-polyposis colorectal cancer. Using direct sequencing, germline mutations were analyzed in the MLH1 and MSH2 genes.


There were four (2.5%) clinical hereditary non-polyposis colorectal cancer patients, three of whom underwent genetic testing, and a mutation (c.882delT) in the MSH2 gene was identified in one patient. There were also 14 (8.7%) suspected hereditary non-polyposis colorectal cancer patients, 6 of whom underwent genetic testing; 1 [1/6 (16.7%)] patient had a mutation (c.1757_1758insC) in the MLH1 gene and 1 patient had a sequence variant of unknown significance (c.1886A < G) in the MSH2 gene. Half of the patients (9 of 18) who met clinical or suspected hereditary non-polyposis colorectal cancer criteria declined genetic testing mainly for the reason of financial factor (8 of 9).


The proportion of hereditary non-polyposis colorectal cancer [11.2% (18 of 161)] was significant to offer genetic counseling and genetic testing in Korean endometrial cancer patients. Optimal financial support is crucial to increase the uptake rate of a genetic test.

  T. W. Bae , E. Vanjildorj , S. Y. Song , S. Nishiguchi , S. S. Yang , I. J. Song , T. Chandrasekhar , T. W. Kang , J. I. Kim , Y. J. Koh , S. Y. Park , J. Lee , Y.-E. Lee , K. H. Ryu , K. Z. Riu , P.-S. Song and H. Y. Lee
  Herbicide-tolerant Zoysia grass (Zoysia japonica Steud.) has been generated previously through Agrobacterium tumefaciens-mediated transformation. The genetically modified (GM) Zoysia grass survived Basta spraying and grew to maturity normally while the wild-type (WT) grass stopped growing and died. GM Zoysia grass will permit more efficient weed control for various turf grass plantings such as home lawns, golf courses, and parks. We examined the environmental/biodiversity risks of herbicide-tolerant GM Zoysia before applying to regulatory agencies for approval for commercial release. The GM and WT Zoysia grass' substantial trait equivalence, ability to cross-pollinate, and gene flow in confined and unconfined test fields were selectively analyzed for environmental/biodiversity effects. No difference between GM and WT Zoysia grass in substantial traits was found. To assess the potential for cross-pollination and gene flow, a non-selective herbicide, Basta, was used. Results showed that unintended cross-pollination with and gene flow from GM Zoysia grass were not detected in neighboring weed species examined, but were observed in WT Zoysia grass (on average, 6% at proximity, 1.2% at a distance of 0.5 m and 0.12% at a radius of 3 m, and 0% at distances over 3 m). On the basis of these initial studies, we conclude that the GM Zoysia grass generated in our laboratory and tested in the Nam Jeju County field does not appear to pose a significant risk when cultivated outside of test fields.
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