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We hypothesized that Surface Enhanced Laser Desorption\/Ionization (SELDI) mass spectrometric analysis of sera from patients with AJCC stage I and II melanoma with negative loco\u2010regional lymph nodes could identify potential melanoma\u2010associated protein biomarkers of disease recurrence. Serum specimens were collected from 49 patients who developed recurrence (<jats:styled-content><jats:italic>n<\/jats:italic>= 25<\/jats:styled-content>) or remained free of recurrence (<jats:styled-content><jats:italic>n<\/jats:italic>= 24<\/jats:styled-content>) without evidence of disease following complete resection (AJCC stage I and II). Follow\u2010up was longer than 5 years. Serum proteins were denatured and applied onto two protein chip chemistry surfaces (weak cationic WCX2; metal\u2010binding, IMAC3\u2010Cu). SELDI ProteinChip\u2122 mass spectrometry was then performed. SELDI data were analyzed, protein peak clustering and classification were performed, and a supervised classification algorithm was employed to classify the dataset. Multiple protein peaks ranging from 3.3 to 30 kDa were identified between patients with recurrence and those without recurrence, and the expression pattern differences of three proteins were used to generate the discriminating classification tree. The biomarkers were expressed with a high degree of reproducibility. In this early characterization study, melanoma recurrence was predicted with a sensitivity of 72% (18\/25) and a specificity of 75% (18\/24). This novel pilot study revealed three proteins that accurately identified patients who developed recurrence after curative resection of primary melanoma.<\/jats:p>","DOI":"10.1196\/annals.1318.047","type":"journal-article","created":{"date-parts":[[2004,7,13]],"date-time":"2004-07-13T23:44:51Z","timestamp":1089762291000},"page":"317-322","source":"Crossref","is-referenced-by-count":53,"title":["Detection of Differentially Expressed Proteins in Early\u2010Stage Melanoma Patients Using SELDI\u2010TOF Mass Spectrometry"],"prefix":"10.1111","volume":"1022","author":[{"given":"LORI L.","family":"WILSON","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"LINH","family":"TRAN","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"DONALD L.","family":"MORTON","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"DAVE S.B.","family":"HOON","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2009,7,8]]},"reference":[{"key":"e_1_2_5_2_2","first-page":"4","article-title":"CA Cancer J","volume":"53","author":"Jemal A.","year":"2003","journal-title":"Clin."},{"key":"e_1_2_5_3_2","unstructured":"Greene F.L. 2002. 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