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TSAP6 is a novel candidate marker of poor survival in metastatic high-grade serous carcinoma.
- Source :
-
Human pathology [Hum Pathol] 2017 Feb; Vol. 60, pp. 180-187. Date of Electronic Publication: 2016 Nov 04. - Publication Year :
- 2017
-
Abstract
- The objective of this study was to analyze the expression and clinical role of molecules involved in exosome synthesis and secretion in high-grade serous carcinoma, with focus on malignant effusions. The mRNA expression levels of ARF6, nSMase2, TSAP6, Rab27a and Rab27b by quantitative real-time reverse-transcription polymerase chain reaction were analyzed in 103 HGSC effusions and 65 solid specimens (35 ovarian, 30 abdominal metastases). Protein expression of ARF6, nSMase2, TSAP6 and Rab27a by Western blotting was analyzed in 150 specimens (94 effusions, 29 ovarian carcinomas, 27 solid metastases). Secreted ARF6, nSMase2 and Rab27a protein levels in exosomes were analyzed in supernatants from 75 effusions. Expression levels were analyzed for association with anatomic site and clinical parameters, including survival. nSMase2 and TSAP6 mRNA was overexpressed in effusions compared to solid lesions (P<.001 and P=.003, respectively), whereas ARF6, nSMase2, TSAP6 and Rab27a protein was overexpressed in solid specimens (ovarian and peritoneal) compared to effusions (P<.001 for all). Secreted ARF6, nSMase2 and Rab27a levels were found in all effusion supernatants. In univariate survival analysis, higher TSAP6 protein levels in effusions were associated with shorter overall survival (P=.01), a finding which was reproduced in analysis of specimens from patients with pre-chemotherapy effusions tapped at diagnosis (P=.026). Higher levels of exosomal Rab27a protein were significantly related to longer overall survival (P=.025). Molecules which are part of the exosome secretion machinery are differentially expressed in HGSC effusions and solid lesions and are present in effusion supernatant-derived exosomes. TSAP6 and Rab27a may be novel prognostic markers in metastatic HGSC.<br /> (Copyright © 2016 Elsevier Inc. All rights reserved.)
- Subjects :
- Adult
Aged
Aged, 80 and over
Biomarkers, Tumor genetics
Blotting, Western
Cell Cycle Proteins
Disease-Free Survival
Exosomes pathology
Female
Humans
Kaplan-Meier Estimate
Middle Aged
Neoplasm Grading
Neoplasms, Cystic, Mucinous, and Serous genetics
Neoplasms, Cystic, Mucinous, and Serous secondary
Neoplasms, Cystic, Mucinous, and Serous therapy
Oncogene Proteins genetics
Ovarian Neoplasms genetics
Ovarian Neoplasms pathology
Ovarian Neoplasms therapy
Oxidoreductases
Peritoneal Neoplasms genetics
Peritoneal Neoplasms secondary
Peritoneal Neoplasms therapy
RNA, Messenger genetics
Real-Time Polymerase Chain Reaction
Reverse Transcriptase Polymerase Chain Reaction
Time Factors
Treatment Outcome
rab GTP-Binding Proteins analysis
rab27 GTP-Binding Proteins
Biomarkers, Tumor analysis
Exosomes chemistry
Neoplasms, Cystic, Mucinous, and Serous chemistry
Oncogene Proteins analysis
Ovarian Neoplasms chemistry
Peritoneal Neoplasms chemistry
Subjects
Details
- Language :
- English
- ISSN :
- 1532-8392
- Volume :
- 60
- Database :
- MEDLINE
- Journal :
- Human pathology
- Publication Type :
- Academic Journal
- Accession number :
- 27825812
- Full Text :
- https://doi.org/10.1016/j.humpath.2016.10.017