title: Identification of potential serum biomarkers for Wilms tumor after excluding confounding effects of common systemic inflammatory factors.
abstract: Wilms tumor is the most common pediatric tumor of the kidney. Previous studies have identified several serum biomarkers for Wilms tumor; however, they lack sufficient specificity and may not adequately distinguish Wilms tumor from confounding conditions. To date, no specific protein biomarker has been confirmed for this pediatric tumor. To identify novel serum biomarkers for Wilms tumor, we used proteomic technologies to perform protein profiling of serum samples from pre-surgery and post-surgery patients with Wilms tumor and healthy controls. Some common systemic inflammatory factors were included to control for systemic inflammation. By comparing protein peaks among the three groups of sera, we identified two peaks (11,526 and 4,756 Da) showing significant differential expression not only between pre-surgery and control sera but also between pre-surgery and post-surgery sera. These two peaks were identified as serum amyloid A1 (SAA1) and apolipoprotein C-III (APO C-III). Western blot analysis confirmed that both proteins were expressed at higher levels in pre-surgery sera than in post-surgery and control sera. Using the method of leave-1-out for cross detection, we demonstrate that detection of these two candidate biomarkers had high sensitivity and specificity in discriminating pre-surgery sera from post-surgery and normal control sera. Taken together, these findings suggest that SAA1 and APO C-III are two potential biomarkers for Wilms tumor.
authors.affiliation: Department of Surgery, The First Affiliated Hospital, Zhengzhou University, Zhengzhou, 450052, Henan, People's Republic of China. w_jiaxiang@126.com
authors.forename: Jiaxiang
authors.initials: J
authors.lastname: Wang
authors.forename: Lei
authors.initials: L
authors.lastname: Wang
authors.forename: Da
authors.initials: D
authors.lastname: Zhang
authors.forename: Yuxia
authors.initials: Y
authors.lastname: Fan
authors.forename: Zhankui
authors.initials: Z
authors.lastname: Jia
authors.forename: Pan
authors.initials: P
authors.lastname: Qin
authors.forename: Jiekai
authors.initials: J
authors.lastname: Yu
authors.forename: Shu
authors.initials: S
authors.lastname: Zheng
authors.forename: Fuquan
authors.initials: F
authors.lastname: Yang
mesh_terms: D000293:Adolescent; D014408:Biomarkers, Tumor / Q000097:blood*; D001798:Blood Proteins / Q000378:metabolism; D015153:Blotting, Western; D016022:Case-Control Studies; D002648:Child; D002675:Child, Preschool; D002851:Chromatography, High Pressure Liquid; D015986:Confounding Factors, Epidemiologic; D005260:Female; D006801:Humans; D007249:Inflammation / Q000097:blood*; D008297:Male; D009363:Neoplasm Proteins / Q000097:blood; D040901:Proteomics; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization; D013223:Statistics as Topic; D009396:Wilms Tumor / Q000097:blood* / Q000601:surgery
chemical_list: D014408:Biomarkers, Tumor; D001798:Blood Proteins; D009363:Neoplasm Proteins