Linked Life Data

18931650

Source:http://linkedlifedata.com/resource/pubmed/id/18931650

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pubmed-article:18931650pubmed:abstractTextAurora-A kinase is a cell-cycle-regulating kinase required for chromosomal segregation. Overexpression of Aurora-A kinase has been shown to correlate with tumor proliferation and chromosomal instability. We investigated Aurora-A kinase expression in peripheral blood and bone marrow of 47 chronic lymphocytic leukemia patients and 20 age-matched hematologically healthy subjects. Western blot analysis showed significantly higher Aurora-A levels in chronic lymphocytic leukemia (42 of 47) compared with lymphocytes of healthy subjects. However, Aurora-A mRNA expression in three chronic lymphocytic leukemia patients was similar to or lower than that of healthy control subjects. In 28 of 42 chronic lymphocytic leukemia patients with elevated Aurora-A kinase expression, one or more chromosomal abnormalities were detected, including trisomy 12 in 9 patients and deletion of the ataxia telangiectasia-mutated gene in 9 patients. Aurora-A was also detected in all (100%) chronic lymphocytic leukemia cases by immunohistochemistry, with a nuclear staining pattern. The larger prolymphocytes and paraimmunoblasts showed stronger Aurora-A kinase expression than did small lymphocytes. In contrast, normal bone marrow reactive lymphocytes were negative for Aurora-A with positive histiocytes and immature myeloid cells. Immunostaining for acetylated histone H3 showed a nuclear pattern in all 38 chronic lymphocytic leukemia cases and double labeling showed coexpression of acetylated histone H3 and Aurora-A. In summary, Aurora-A kinase is overexpressed in chronic lymphocytic leukemia cells. The expression of acetylated histone H3 suggests that Aurora-A kinase may be active (functional). Thus, Aurora-A kinase overexpression in chronic lymphocytic leukemia may be involved in the genesis of chromosomal abnormalities and is a potential target for therapeutic intervention.lld:pubmed
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pubmed-article:18931650pubmed:articleTitleAurora-A kinase nuclear expression in chronic lymphocytic leukemia.lld:pubmed
pubmed-article:18931650pubmed:affiliationDepartment of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA.lld:pubmed
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