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Articles by M. H Lee
Total Records ( 3 ) for M. H Lee
  Y. S Park , J. H Park , S. H Kim , M. H Lee , Y. S Lee , S. C Yang and J. S. Kang

Limaprost, a prostaglandin E1 analogue, with a strong vasodilatory and antiplatelet activity has been used to release from the symptoms of thromboangiitis obliterans (TAO), which is more prevalent in Korea and Japan, and lumbar spinal canal stenosis (LSCS). In spite of many uses of limaprost, the pharmacokinetics (PK) of it has not been studied in the Korean population. Therefore, a preliminary PK study was designed at a clinical oral dosage of 30-µg limaprost in 5 healthy Korean volunteers. Blood samples were obtained at 14 consecutive time points for 12 hours after dosing and analyzed by liquid chromatography—tandem mass spectrometry with electrospray ionization (LC-ESI/MS/ MS) at a very low detection limit of 0.5 pg/mL of limaprost in human plasma with considerably short run time (18 minutes). Pharmacokinetic characteristics resulted in ‘‘time for maximal concentrations (Tmax 0.5 hour),’’ ‘‘elimination half-life (T1/2 1.64 hours),’’ ‘‘maximal concentration (Cmax 13.37 pg/mL),’’ ‘‘area under the curve (AUC12 hours 18.60 pg · h/mL),’’ ‘‘AUC extrapolated to infinity (AUCinfinity 22.98 pg · h/mL),’’ ‘‘extrapolation (AUCinfinity — 12 hours/AUCinfinity 0.15%),’’ ‘‘elimination rate constant (ke 0.68 h—1),’’ ‘‘systemic clearance (CL 1.77 L/h),’’ and ‘‘mean residence time (MRT 1.74 hours).’’ These results showed that orally administered 30-µg limaprost was rapidly and highly absorbed, and it was considerably eliminated fast from the blood stream in the healthy Korean volunteers.

  J. G Kim , S. K Sohn , Y. S Chae , J. H Moon , S. N Kim , B. W Kang , G. C Kim , M. H Lee , S. W Jeon , H. Y Chung and W. Yu

The present study analyzed the functional insertion/deletion polymorphism in the promoter region of NFKB1 gene and their impact on the prognosis for patients with gastric adenocarcinoma.


Four hundred and seventy two consecutive patients with curatively resected gastric adenocarcinoma were enrolled in the present study. The genomic DNA was extracted from paraffin-embedded tissue and the –94 insertion/deletion ATTG polymorphism of NFKB1 determined using a polymerase chain reaction–restriction fragment length polymorphism assay.


The NFKB1 promoter gene polymorphism was successfully amplified in 97.8% of the cases. There were no sexual differences in relation to the genotype and allele. No correlation was observed between the frequency of the genotype or allele and the T, N or M stage. The multivariate survival analysis showed no association between the NFKB1 –94 insertion/deletion promoter polymorphism and the disease-free survival or overall survival of the patients with gastric cancer.


The functional NFKB1 promoter polymorphism was not found to be a prognostic marker for Korean patients with surgically resected gastric adenocarcinoma.

  L. J Hsu , L Schultz , Q Hong , K Van Moer , J Heath , M. Y Li , F. J Lai , S. R Lin , M. H Lee , C. P Lo , Y. S Lin , S. T Chen and N. S. Chang

Transforming growth factor β (TGF-β) initiates multiple signal pathways and activates many downstream kinases. Here, we determined that TGF-β1 bound cell surface hyaluronidase Hyal-2 on microvilli in type II TGF-β receptor-deficient HCT116 cells, as determined by immunoelectron microscopy. This binding resulted in recruitment of proapoptotic WOX1 (also named WWOX or FOR) and formation of Hyal-2·WOX1 complexes for relocation to the nuclei. TGF-β1 strengthened the binding of the catalytic domain of Hyal-2 with the N-terminal Tyr-33-phosphorylated WW domain of WOX1, as determined by time lapse fluorescence resonance energy transfer analysis in live cells, co-immunoprecipitation, and yeast two-hybrid domain/domain mapping. In promoter activation assay, ectopic WOX1 or Hyal-2 alone increased the promoter activity driven by Smad. In combination, WOX1 and Hyal-2 dramatically enhanced the promoter activation (8–9-fold increases), which subsequently led to cell death (>95% of promoter-activated cells). TGF-β1 supports L929 fibroblast growth. In contrast, transiently overexpressed WOX1 and Hyal-2 sensitized L929 to TGF-β1-induced apoptosis. Together, TGF-β1 invokes a novel signaling by engaging cell surface Hyal-2 and recruiting WOX1 for regulating the activation of Smad-driven promoter, thereby controlling cell growth and death.

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