{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,4]],"date-time":"2026-10-04T19:25:38Z","timestamp":1791141938596,"version":"4.1.0"},"reference-count":61,"publisher":"Wiley","issue":"8","license":[{"start":{"date-parts":[[2006,6,20]],"date-time":"2006-06-20T00:00:00Z","timestamp":1150761600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Molecular Carcinogenesis"],"published-print":{"date-parts":[[2006,8]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>In order to better understand basic mechanisms of tumor development and identify potential new biomarkers, we have performed difference gel electrophoresis (DIGE) and peptide mass fingerprinting on pooled protein extracts from patients with papillary thyroid carcinoma (PTC) compared with matched normal thyroid tissue. Image analysis of DIGE gels comparing PTC and matched normal thyroid tissue protein indicated that 25% of the protein spots were differentially expressed at a 2.5\u2010fold cutoff and 35% at two\u2010fold. Comparison between two different pools of protein from normal thyroid tissues revealed differential protein expression of only 4% at 2.5\u2010fold and 6% at two\u2010fold cutoff. One hundred ninety\u2010two protein spots were identified by MALDI\u2010TOFMS, representing 90 distinct proteins. Excluding albumin, globins and thyroglobulin, imaging software determined 31 proteins to be differentially expressed at the two\u2010fold (or greater) level. Individual gel comparisons (PTC vs. matched normal) from five patients established that 15\/31 (48%) of these proteins exhibited statistically significant differential expression. Previously identified molecular markers in this group of proteins include cathepsin B, cytokeratin 19, and galectin\u20103. Novel differentially expressed proteins include S100A6, moesin, HSP70 (BiP), peroxiredoxin 2, protein phosphatase 2, selenium binding protein 1, vitamin D binding protein, and proteins involved in mitochondrial function. The use of two\u2010dimensional gel electrophoresis (2DGE) revealed a significantly altered protein mass and\/or pI in 10%\u201315% of proteins, suggesting alternatively spliced forms and other posttranslational modification of proteins revealed by this approach. We confirmed S100A6 as a potentially useful biomarker using immunohistochemical analysis (85% sensitivity and 69% specificity for distinguishing benign from malignant thyroid neoplasms). In summary, proteomic analysis of PTC using DIGE and mass spectrometry has confirmed several known biomarkers, uncovered novel potential biomarkers, and provided insights into global pathophysiologic changes in PTC. Many of the differences observed would not have been detected by genomic or other proteomic approaches. \u00a9 2006 Wiley\u2010Liss, Inc.<\/jats:p>","DOI":"10.1002\/mc.20193","type":"journal-article","created":{"date-parts":[[2006,6,20]],"date-time":"2006-06-20T22:04:31Z","timestamp":1150841071000},"page":"613-626","source":"Crossref","is-referenced-by-count":112,"title":["Quantitative and qualitative differences in protein expression between papillary thyroid carcinoma and normal thyroid tissue"],"prefix":"10.1002","volume":"45","author":[{"given":"Lewis M.","family":"Brown","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Steve M.","family":"Helmke","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Stephen W.","family":"Hunsucker","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Romana 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