RT Journal Article SR Electronic T1 Detection of Novel Urine Markers Using Immune Complexome Analysis in Bladder Cancer Patients: A Preliminary Study JF In Vivo JO In Vivo FD International Institute of Anticancer Research SP 2073 OP 2080 DO 10.21873/invivo.12476 VO 35 IS 4 A1 NOZOMI AIBARA A1 YASUYOSHI MIYATA A1 KYOHEI ARAKI A1 YUJI SAGARA A1 KENSUKE MITSUNARI A1 TOMOHIRO MATSUO A1 KOJIRO OHBA A1 YASUSHI MOCHIZUKI A1 HIDEKI SAKAI A1 KANAME OHYAMA YR 2021 UL http://iv.iiarjournals.org/content/35/4/2073.abstract AB Background/Aim: Little is known on urine biomarkers that are associated with malignant behavior in patients with bladder cancer (BC). Our aim was to identify BC-related factors in urine samples using our original method “immune complexome analysis”, based on detecting the immune complex (IC). Patients and Methods: Immune complexome analysis was performed using urine samples from 97 BC patients, including 67 with non-muscle invasive BC (NMIBC). Results: Eight IC-antigens were recognized as candidates for BC-related factors from 20,165 proteins. IC-serum albumin, -fibrinogen γ chain, -hemoglobin subunit α, -hemoglobin subunit β, -ceruloplasmin, and fibrinogen β chain were significantly associated with either pathological features and/or outcome. IC-ceruloplasmin was most widely associated with pathological features in all BC patients and lamina propria invasion and urinary tract recurrence in NMIBC. Conclusion: Based on detection of IC-antigens it was demonstrated that six IC-antigens, especially IC-ceruloplasmin, are potential urine biomarkers in BC.