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Articles by M Sun
Total Records ( 3 ) for M Sun
  R. H Perlis , J. W Smoller , J Mysore , M Sun , T Gillis , S Purcell , M Rietschel , M. M Nothen , S Witt , W Maier , D. V Iosifescu , P Sullivan , A. J Rush , M Fava , H Breiter , M Macdonald and J. Gusella

Presymptomatic individuals with the Huntingtin (HTT) CAG expansion mutation that causes Huntington's disease may have higher levels of depressive symptoms than healthy comparison populations. However, the prevalence of HTT CAG repeat expansions among individuals diagnosed with major depressive disorder has not been established.


This was a case-control genetic association study of HTT CAG allele size in two discovery cohorts of individuals with major depressive disorder and comparison subjects without major depression as well as a replication cohort of individuals with major depression and comparison subjects without major depression.


CAG repeat lengths of 36 or greater were observed in six of 3,054 chromosomes from individuals with major depression, compared with none of 4,155 chromosomes from comparison subjects. In a third cohort, one expanded allele was observed among 1,202 chromosomes in the major depression group, compared with none of 2,678 chromosomes in comparison subjects. No clear pattern of clinical features was shared among individuals with the expanded repeats.


In clinical populations of individuals diagnosed with major depression, approximately 3 in 1,000 carried expanded HTT CAG alleles.

  C Gourley , A. J.W Paige , K. J Taylor , C Ward , B Kuske , J Zhang , M Sun , S Janczar , D. J Harrison , M Muir , J. F Smyth and H. Gabra

The WW domain–containing oxidoreductase (WWOX) gene is located at FRA16D, a common fragile site involved in human cancer. Targeted deletion of Wwox in mice causes increased spontaneous tumor incidence, confirming that WWOX is a bona fide tumor suppressor gene. We show that stable transfection of WWOX into human PEO1 ovarian cancer cells, containing homozygous WWOX deletion, abolishes in vivo tumorigenicity, but this does not correlate with alteration of in vitro growth. Rather, WWOX restoration in PEO1, or WWOX overexpression in SKOV3 ovarian cancer cells, results in reduced attachment and migration on fibronectin, an extracellular matrix component linked to peritoneal metastasis. Conversely, siRNA-mediated knockdown of endogenous WWOX in A2780 ovarian cancer cells increases adhesion to fibronectin. In addition, whereas there is no WWOX-dependent difference in cell death in adherent cells, WWOX-transfected cells in suspension culture display a proapoptotic phenotype. We further show that WWOX expression reduces membranous integrin 3 protein but not integrin 3 mRNA levels, and that adhesion of PEO1 cells to fibronectin is predominantly mediated through integrin 3. We therefore propose that WWOX acts as an ovarian tumor suppressor by modulating the interaction between tumor cells and the extracellular matrix and by inducing apoptosis in detached cells. Consistent with this, the suppression of PEO1 tumorigenicity by WWOX can be partially overcome by implanting these tumor cells in Matrigel. These data suggest a possible role for the loss of WWOX in the peritoneal dissemination of human ovarian cancer cells. [Cancer Res 2009;69(11):4835–42]

  R Kawamura , L. H Pope , M. O Christensen , M Sun , K Terekhova , F Boege , C Mielke , A. H Andersen and J. F. Marko

Chromatin entanglements undergo specific protein-mediated compaction to fold into mitotic chromosomes.

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