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Gene expression in endoprosthesis loosening: Chitinase activity for early diagnosis? by L. Morawietz; A. Weimann; J. H. Schroeder; R. J. Kuban; U. Ungethuem; C. Kaps; H. Slevogt; T. Gehrke; M. G. Krukemeyer; V. Krenn is a Medicine article available to read on EtoBox.
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## Abstract The aim of the study was to identify markers for the early diagnosis of endoprosthesis loosening, for the differentiation between wear particle–induced and septic loosening and to gather new insights into the pathogenesis of endoprosthesis loosening. Gene expression profiles were generated from five periprosthetic membranes of wear particle–induced and five of infectious (septic) type using Affymetrix HG U133A oligonucleotide microarrays. The results of selected differentially expressed genes were validated by RT‐PCR (__n__ = 30). The enzyme activity and the genotype of chitinase‐1 were assessed in serum samples from 313 consecutive patients hospitalized for endoprosthesis loosening (__n__ = 54) or for other reasons, serving as control subjects (__n__ = 259). Eight hundred twenty‐four genes were differentially expressed with a fold change greater than 2 (data sets on http://www.ncbi.nlm.nih.gov/geo/ GSE 7103). Among these were chitinase 1, CD52, calpain 3, apolipoprotein, CD18, lysyl oxidase, cathepsin D, E‐cadherin, VE‐cadherin, nidogen, angiopoietin 1, and thrombospondin 2. Their differential expression levels were validated by RT‐PCR. The chitinase activity was signi
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- Author
- L. Morawietz; A. Weimann; J. H. Schroeder; R. J. Kuban; U. Ungethuem; C. Kaps; H. Slevogt; T. Gehrke; M. G. Krukemeyer; V. Krenn
- Publisher
- Elsevier Science; Wiley (John Wiley & Sons); Wiley-Blackwell; Wiley (ISSN 0736-0266)
- Published
- 2007
- Language
- EN
- Field
- Medicine (Health Sciences)