ArticleClinical & translational oncology : official publication of the Federation of Spanish Oncology Societies and of the National Cancer Institute of Mexico2017
A novel capillary nano-immunoassay for assessing androgen receptor splice variant 7 in plasma. Correlation with CD133 antigen expression in circulating tumor cells. A pilot study in prostate cancer patients.
Article in Clinical & translational oncology : official publication of the Federation of Spanish Oncology Societies and of the National Cancer Institute of Mexico, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
What it found
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Who cites it
4 citing papers in PubMed, 6 citations in OpenAlex.
- Liquid Biopsy in Diagnosis and Prognosis of Non-Metastatic Prostate Cancer.Biomedicines · 2022Review
- Clinical Perspective and Translational Oncology of Liquid Biopsy.Diagnostics (Basel, Switzerland) · 2020Review
- Liquid Biopsy as Novel Tool in Precision Medicine: Origins, Properties, Identification and Clinical Perspective of Cancer's Biomarkers.Diagnostics (Basel, Switzerland) · 2020Review
- Review
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Authors and funding
13 authors at 3 institutions in 1 country.
Funding
Abstract
purposeAndrogen receptor (AR) splice variant 7 (AR-V7) has been related with both a higher risk of prostate cancer (PC) progression and differential responsiveness to hormonal agents versus chemotherapy. The objective of this study was to investigate the feasibility of a novel capillary nano-immunoassay in assessing AR-V7 in plasma from PC patients.
methodsPatients with either localized or advanced PC were included in the study. Assessment of AR-V7 in plasma was performed through a capillary nano-immunoassay platform. Correlation with clinical data, stem cell biomarkers (such as CD133+), AR amplification and PTEN status was identified.
resultsThe study included 72 PC patients. AR-V7 signal was detected in 21 (29%) patients: 17 (81%) had a Gleason score ≥7, 15 (71%) castration-resistant prostate cancer (CRPC), 18 (86%) metastatic disease and PSA (median) high than AR-V7 negative (p < 0.05). CD133 was expressed in 69 (96%) patients. The median CD133+ expression in circulating tumor cells CTCs was higher among the 21 AR-V7 positive cases versus AR-V7 negative (7 vs. 3). Androgen Receptor and PTEN fluorescence in situ hybridization (FISH) on CD133+ captured cells were performed: 37 cases showed ≥four CD133+ CTCs, of which 81% showed an increased AR copy number. This percentage was similar in both AR-V7-positive and AR-V7-negative patients. A total of 68% of the cases showed deletion of PTEN: 70% were ARV-7 positive vs. 67%, which were AR-V7 negative.
conclusionsAssessing the presence of AR-V7 in plasma from PC patients is feasible by a novel capillary nano-immunoassay. AR-V7 was observed in 29% of the tumors and is more frequent in aggressive tumors.
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