Distinct sFOLR1 and Cytokine Secretion Profiles Across Marker-Enriched OVCAR-3 Ovarian Cancer Cell Subpopulations: A Pilot Study
7 affiliations
- 1Department of Surgical Oncology and Gynecologic Oncology, ‘Iuliu Hațieganu’ University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania
- 2Department of Surgical Oncology, “Prof. Dr. Ion Chiricuta” Institute of Oncology, 400015 Cluj-Napoca, Romania
- 3Tumor Biology Department, “Prof. Dr. Ion Chiricuta” Institute of Oncology, 400015 Cluj-Napoca, Romania
- 4Department of Medical Oncology, “Prof. Dr. Ion Chiricuta” Institute of Oncology, 400015 Cluj-Napoca, Romania
- 5Department of Functional Genomics, Proteomics and Experimental Pathology, “Prof. Dr. Ion Chiricuta” Institute of Oncology, 400015 Cluj-Napoca, Romania
- 6Department of Pathology, “Prof. Dr. Ion Chiricuta” Institute of Oncology, 400015 Cluj-Napoca, Romania
- 7Department of Inorganic Chemistry, Faculty of Natural Sciences, Comenius University Bratislava, Ilkovičova 6, Mlynská dolina, 84215 Bratislava, Slovakia
Abstract
Background: Folate Receptor Alpha (FRα), encoded by the Folate Receptor 1 (FOLR1) gene, is expressed in many high-grade serous ovarian carcinomas, but the tumor-cell phenotypes contributing to soluble FOLR1 (sFOLR1) release remain unclear. This pilot study compared sFOLR1 and cytokine secretion across OVCAR-3 fractions enriched for CD133, EpCAM/CD326, CD90, and ABCG2/CD338. Methods: The parental OVCAR-3 culture was phenotyped by flow cytometry and separated into marker-positive and marker-negative fractions using CD133, EpCAM/CD326, and ABCG2/CD338 immunomagnetic selection. CD90-positive and corresponding negative fractions were isolated after indirect co-culture of OVCAR-3 cells with primary mesenchymal stromal cells. Paired fractions were cultured for 120 h, and sFOLR1, vascular endothelial growth factor (VEGF), interleukin (IL)-6, and IL-10 were measured at 24 h intervals. Results: sFOLR1 release varied markedly by time and phenotype. CD133-positive and CD326-positive fractions showed time-dependent increases; CD90-positive maintained low, comparatively stable concentrations; and CD338-positive declined from a high early value, while the corresponding negative fraction increased. In CD133-positive and CD326-positive fractions, sFOLR1 tracked with VEGF and/or IL-6, whereas CD90-positive and CD338-positive fractions showed distinct, partly uncoupled cytokine patterns. Conclusions: These exploratory associations in a single cell line support further investigation of sFOLR1 and cytokine profiles.
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BibTeX
@article{pașca2026distinct,
title = {{Distinct sFOLR1 and Cytokine Secretion Profiles Across Marker-Enriched OVCAR-3 Ovarian Cancer Cell Subpopulations: A Pilot Study}},
author = {Andrei Pașca and Eva Fischer-Fodor and Paul Milan Kubelac and Ovidiu Bălăcescu and Oana Baldasici and Bogdan Pop and Natalia Miklášová and Nicoleta-Monica Pașca and Cătălin Ioan Vlad and Patriciu Andrei Achimaș-Cadariu},
journal = {Biomolecules},
year = {2026},
month = oct,
doi = {10.3390/biom16101462},
url = {https://www.mdpi.com/2218-273X/16/10/1462},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Distinct sFOLR1 and Cytokine Secretion Profiles Across Marker-Enriched OVCAR-3 Ovarian Cancer Cell Subpopulations: A Pilot Study
AU - Andrei Pașca
AU - Eva Fischer-Fodor
AU - Paul Milan Kubelac
AU - Ovidiu Bălăcescu
AU - Oana Baldasici
AU - Bogdan Pop
AU - Natalia Miklášová
AU - Nicoleta-Monica Pașca
AU - Cătălin Ioan Vlad
AU - Patriciu Andrei Achimaș-Cadariu
PY - 2026
DA - 2026/10/01
JO - Biomolecules
DO - 10.3390/biom16101462
UR - https://www.mdpi.com/2218-273X/16/10/1462
AB - Background: Folate Receptor Alpha (FRα), encoded by the Folate Receptor 1 (FOLR1) gene, is expressed in many high-grade serous ovarian carcinomas, but the tumor-cell phenotypes contributing to soluble FOLR1 (sFOLR1) release remain unclear. This pilot study compared sFOLR1 and cytokine secretion across OVCAR-3 fractions enriched for CD133, EpCAM/CD326, CD90, and ABCG2/CD338. Methods: The parental OVCAR-3 culture was phenotyped by flow cytometry and separated into marker-positive and marker-negative fractions using CD133, EpCAM/CD326, and ABCG2/CD338 immunomagnetic selection. CD90-positive and corresponding negative fractions were isolated after indirect co-culture of OVCAR-3 cells with primary mesenchymal stromal cells. Paired fractions were cultured for 120 h, and sFOLR1, vascular endothelial growth factor (VEGF), interleukin (IL)-6, and IL-10 were measured at 24 h intervals. Results: sFOLR1 release varied markedly by time and phenotype. CD133-positive and CD326-positive fractions showed time-dependent increases; CD90-positive maintained low, comparatively stable concentrations; and CD338-positive declined from a high early value, while the corresponding negative fraction increased. In CD133-positive and CD326-positive fractions, sFOLR1 tracked with VEGF and/or IL-6, whereas CD90-positive and CD338-positive fractions showed distinct, partly uncoupled cytokine patterns. Conclusions: These exploratory associations in a single cell line support further investigation of sFOLR1 and cytokine profiles.
SN - 2218-273X
ER -