Cancer-associated fibroblasts in the tumor microenvironment of tongue carcinoma is a heterogeneous cell population |
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Authors: | Marilena Vered Anna Shnaiderman-Shapiro Ayelet Zlotogorski-Hurvitz Tuula Salo Ran Yahalom |
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Affiliation: | 1. Dept. Oral Pathology, Oral Medicine and Oral Radiology, School of Dental Medicine, Tel Aviv University, Tel Aviv, Israel;2. Institute of Pathology, The Chaim Sheba Medical Center, Tel Hashomer, Ramat Gan, Israel;3. Dept. Oral and Maxillofacial Surgery, Rabin Medical Center, Beilinson Campus, Petah Tikva, Israel;4. Cancer and Translational Research Unit, University of Oulu and MRC, Oulu University Hospital, Oulu, Finland;5. Oral and Maxillofacial Diseases, Clinicum, University of Helsinki, Helsinki, and HUSLAB, Helsinki University Hospital, Helsinki, Finland;6. Dept. Oral and Maxillofacial Surgery, The Chaim Sheba Medical Center, Tel Hashomer, Ramat Gan, Israel |
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Abstract: | ObjectivesTo examine different immunophenotypes of cancer-associated fibroblasts (CAFs) in tongue squamous cell carcinoma (TSCC) and to investigate how they related to clinical outcomes.MethodsSerial sections from 54 cases of TSCC were immunohistochemically stained with α-smooth muscle actin (αSMA, CAF marker) to determine CAF density, and double-immunostained with αSMA combined with CD80 and CD86 (myeloid/monocytic-derived cell markers), Nanog (mesenchymal stem cell marker) and CD133 (hematopoietic/endothelial stem cell marker). Density of cells co-expressing these marker combinations was semi-quantitatively assessed in 5 randomly selected high power fields within the tumor area and scored as 1 – one-to-five stained cells in each field, 2 – more than 5 stained cells in each field; any finding less than score 1, was allocated a score of 0.ResultsThere were 26 CAF-poor, 16 CAF-rich and 12 CAF-intermediated cases. CD86+αSMA+ cells were the most frequent (80.4%) followed by CD80+αSMA+ (72%) and Nanog+αSMA+ cells (56%). The CD133+αSMA+ phenotype was found only in association with blood vessels. High density of αSMA+ CAFs was associated with disease recurrence and poor survival (p < 0.05). Increased density of CD86+αSMA+ cells was significantly associated with CAF-rich tumors and with poor survival (p < 0.05).ConclusionIn TSCC, CAFs demonstrate heterogeneous and overlapping phenotypes with the myeloid/monocytic type being the most frequent and having an impact on the clinical outcomes. Further studies are needed in order to further characterize CAF phenotypes in carcinomas of various oral sites, as this may open new frontiers for personalized medicine. |
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Keywords: | Corresponding author at: Dept. Oral Pathology, Oral Medicine and Oral Radiology, School of Dental Medicine, Tel Aviv University, Tel Aviv, Israel. αSMA alpha smooth muscle actin CAFs cancer-associated fibroblasts MMT macrophage-to-myofibroblast transition MSC mesenchymal stem cells OSCC oral squamous cell carcinoma SCC squamous cell carcinoma TSCC tongue squamous cell carcinoma Tongue squamous cell carcinoma Cancer-associated fibroblasts Alpha smooth muscle actin CD80 CD86 Tumor microenvironment |
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