PMID- 26414287 OWN - NLM STAT- MEDLINE DCOM- 20160607 LR - 20220408 IS - 1932-6203 (Electronic) IS - 1932-6203 (Linking) VI - 10 IP - 9 DP - 2015 TI - Identification of Circulating Biomarker Candidates for Hepatocellular Carcinoma (HCC): An Integrated Prioritization Approach. PG - e0138913 LID - 10.1371/journal.pone.0138913 [doi] LID - e0138913 AB - Hepatocellular carcinoma (HCC) is the world's third most widespread cancer. Currently available circulating biomarkers for this silently progressing malignancy are not sufficiently specific and sensitive to meet all clinical needs. There is an imminent and pressing need for the identification of novel circulating biomarkers to increase disease-free survival rate. In order to facilitate the selection of the most promising circulating protein biomarkers, we attempted to define an objective method likely to have a significant impact on the analysis of vast data generated from cutting-edge technologies. Current study exploits data available in seven publicly accessible gene and protein databases, unveiling 731 liver-specific proteins through initial enrichment analysis. Verification of expression profiles followed by integration of proteomic datasets, enriched for the cancer secretome, filtered out 20 proteins including 6 previously characterized circulating HCC biomarkers. Finally, interactome analysis of these proteins with midkine (MDK), dickkopf-1 (DKK-1), current standard HCC biomarker alpha-fetoprotein (AFP), its interacting partners in conjunction with HCC-specific circulating and liver deregulated miRNAs target filtration highlighted seven novel statistically significant putative biomarkers including complement component 8, alpha (C8A), mannose binding lectin (MBL2), antithrombin III (SERPINC1), 11beta-hydroxysteroid dehydrogenase type 1 (HSD11B1), alcohol dehydrogenase 6 (ADH6), beta-ureidopropionase (UPB1) and cytochrome P450, family 2, subfamily A, polypeptide 6 (CYP2A6). Our proposed methodology provides a swift assortment process for biomarker prioritization that eventually reduces the economic burden of experimental evaluation. Further dedicated validation studies of potential putative biomarkers on HCC patient blood samples are warranted. We hope that the use of such integrative secretome, interactome and miRNAs target filtration approach will accelerate the selection of high-priority biomarkers for other diseases as well, that are more amenable to downstream clinical validation experiments. FAU - Awan, Faryal Mehwish AU - Awan FM AD - Atta-ur-Rahman School of Applied Biosciences (ASAB), National University of Sciences and Technology (NUST), H-12 Islamabad, Pakistan. FAU - Naz, Anam AU - Naz A AD - Atta-ur-Rahman School of Applied Biosciences (ASAB), National University of Sciences and Technology (NUST), H-12 Islamabad, Pakistan. FAU - Obaid, Ayesha AU - Obaid A AD - Atta-ur-Rahman School of Applied Biosciences (ASAB), National University of Sciences and Technology (NUST), H-12 Islamabad, Pakistan. FAU - Ali, Amjad AU - Ali A AD - Atta-ur-Rahman School of Applied Biosciences (ASAB), National University of Sciences and Technology (NUST), H-12 Islamabad, Pakistan. FAU - Ahmad, Jamil AU - Ahmad J AD - Research Center for Modeling and Simulation (RCMS), National University of Sciences and Technology (NUST), H-12 Islamabad, Pakistan. FAU - Anjum, Sadia AU - Anjum S AD - Atta-ur-Rahman School of Applied Biosciences (ASAB), National University of Sciences and Technology (NUST), H-12 Islamabad, Pakistan. FAU - Janjua, Hussnain Ahmed AU - Janjua HA AD - Atta-ur-Rahman School of Applied Biosciences (ASAB), National University of Sciences and Technology (NUST), H-12 Islamabad, Pakistan. LA - eng PT - Journal Article DEP - 20150928 PL - United States TA - PLoS One JT - PloS one JID - 101285081 RN - 0 (Biomarkers, Tumor) RN - 0 (MicroRNAs) RN - 0 (Neoplasm Proteins) RN - 0 (Proteome) SB - IM MH - Biomarkers, Tumor/*blood MH - Carcinoma, Hepatocellular/*blood/genetics MH - Databases, Protein MH - Disease-Free Survival MH - Humans MH - Kaplan-Meier Estimate MH - Liver/metabolism/pathology MH - Liver Neoplasms/*blood/genetics MH - MicroRNAs/genetics/metabolism MH - Neoplasm Proteins/blood/metabolism MH - Organ Specificity MH - Protein Interaction Mapping MH - Proteome/metabolism MH - ROC Curve PMC - PMC4586137 COIS- Competing Interests: The authors have declared that no competing interests exist. EDAT- 2015/09/29 06:00 MHDA- 2016/06/09 06:00 PMCR- 2015/09/28 CRDT- 2015/09/29 06:00 PHST- 2015/06/02 00:00 [received] PHST- 2015/09/06 00:00 [accepted] PHST- 2015/09/29 06:00 [entrez] PHST- 2015/09/29 06:00 [pubmed] PHST- 2016/06/09 06:00 [medline] PHST- 2015/09/28 00:00 [pmc-release] AID - PONE-D-15-23568 [pii] AID - 10.1371/journal.pone.0138913 [doi] PST - epublish SO - PLoS One. 2015 Sep 28;10(9):e0138913. doi: 10.1371/journal.pone.0138913. eCollection 2015.