OBJECTIVE: The objective of this study was to determine if protein-by-products secondary to cancer related oncogenes appear in the saliva of breast cancer patients. METHODS: Three pooled (n = 10 subjects/pool) stimulated whole saliva specimens from women were analyzed. One pooled specimen was from healthy women, another pooled specimen from women diagnosed with a benign breast tumor and the other one pooled specimen was from women diagnosed with ductal carcinoma in situ (DCIS). Differential expression of proteins was measured by isotopically tagging proteins in the tumor groups and comparing them to the healthy control group. Experimentally, saliva from each of the pooled samples was trypsinized and the peptide digests labeled with the appropriate iTRAQ reagent. Labeled peptides from each of the digests were combined and analyzed by reverse phase (C18) capillary chromatography on an Applied Biosystems QStar LC-MS/MS mass spectrometer equipped with an LC-Packings HPLC. RESULTS: The results of the salivary analyses in this population of patients yielded approximately 130 proteins in the saliva specimens. Forty-nine proteins were differentially expressed between the healthy control pool and the benign and cancer patient groups. CONCLUSIONS: The study suggests that saliva is a fluid suffused with solubilized by-products of oncogenic expression and that these proteins may be modulated secondary to DCIS. Additionally, there may be salivary protein profiles that are unique to both DCIS and fibroadenoma tumors.
OBJECTIVE: The objective of this study was to determine if protein-by-products secondary to cancer related oncogenes appear in the saliva of breast cancerpatients. METHODS: Three pooled (n = 10 subjects/pool) stimulated whole saliva specimens from women were analyzed. One pooled specimen was from healthy women, another pooled specimen from women diagnosed with a benign breast tumor and the other one pooled specimen was from women diagnosed with ductal carcinoma in situ (DCIS). Differential expression of proteins was measured by isotopically tagging proteins in the tumor groups and comparing them to the healthy control group. Experimentally, saliva from each of the pooled samples was trypsinized and the peptide digests labeled with the appropriate iTRAQ reagent. Labeled peptides from each of the digests were combined and analyzed by reverse phase (C18) capillary chromatography on an Applied Biosystems QStar LC-MS/MS mass spectrometer equipped with an LC-Packings HPLC. RESULTS: The results of the salivary analyses in this population of patients yielded approximately 130 proteins in the saliva specimens. Forty-nine proteins were differentially expressed between the healthy control pool and the benign and cancerpatient groups. CONCLUSIONS: The study suggests that saliva is a fluid suffused with solubilized by-products of oncogenic expression and that these proteins may be modulated secondary to DCIS. Additionally, there may be salivary protein profiles that are unique to both DCIS and fibroadenoma tumors.
Authors: Lucas Delmonico; Maryah Bravo; Rafaele Tavares Silvestre; Maria Helena Faria Ornellas; Carolina Maria De Azevedo; Gilda Alves Journal: Oncol Lett Date: 2016-07-08 Impact factor: 2.967
Authors: V Thumbigere-Math; B S Michalowicz; E P de Jong; T J Griffin; D L Basi; P J Hughes; M L Tsai; K K Swenson; L Rockwell; R Gopalakrishnan Journal: Oral Dis Date: 2013-11-29 Impact factor: 3.511
Authors: Lei Zhang; James J Farrell; Hui Zhou; David Elashoff; David Akin; No-Hee Park; David Chia; David T Wong Journal: Gastroenterology Date: 2009-11-18 Impact factor: 22.682
Authors: Sompop Bencharit; Sandra K Altarawneh; Sarah Schwartz Baxter; Jim Carlson; Gary F Ross; Michael B Border; C Russell Mack; Warren C Byrd; Christopher F Dibble; Silvana Barros; Zvi Loewy; Steven Offenbacher Journal: Mol Biosyst Date: 2012-10-30