Primary cilia in gastric Gastrointestinal Stromal Tumours (GISTs): an ultrastructural study
Article first published online: 15 MAY 2013
© 2013 The Authors. Journal of Cellular and Molecular Medicine Published by Foundation for Cellular and Molecular Medicine/Blackwell Publishing Ltd
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Journal of Cellular and Molecular Medicine
Volume 17, Issue 7, pages 844–853, July 2013
How to Cite
Castiella, T., Muñoz, G., Luesma, M. J., Santander, S., Soriano, M. and Junquera, C. (2013), Primary cilia in gastric Gastrointestinal Stromal Tumours (GISTs): an ultrastructural study. Journal of Cellular and Molecular Medicine, 17: 844–853. doi: 10.1111/jcmm.12067
- Issue published online: 24 JUL 2013
- Article first published online: 15 MAY 2013
- Manuscript Accepted: 15 MAR 2013
- Manuscript Received: 12 JUL 2012
- primary cilia;
- gastric gastrointestinal stromal tumours;
Gastrointestinal stromal tumours (GISTs) are the most common mesenchymal (non-epithelial) neoplasms of the human gastrointestinal (GI) tract. They are thought to derive from interstitial cells of Cajal (ICCs) or an ICC progenitor based on immunophenotypical and ultrastructural similarities. Because ICCs show primary cilium, our hypothesis is based on the possibility that some of these neoplastic cells could also present it. To determine this, an exhaustive ultrastructural study has been developed on four gastric GISTs. Previous studies had demonstrated considerable variability in tumour cells with two dominating phenotypes, spindly and epithelioid. In addition to these two types, we have found another cell type reminiscent of adult ICCs with a voluminous nucleus surrounded by narrow perinuclear cytoplasm with long slender cytoplasmic processes. We have also noted the presence of small undifferentiated cells. In this study, we report for the first time the presence of primary cilia (PCs) in spindle and epithelioid tumour cells, an ultrastructural feature we consider of special interest that has hitherto been ignored in the literature dealing with the ultrastructure of GISTs. We also point out the frequent occurrence of multivesicular bodies (MVBs). The ultrastructural findings described in gastric GISTs in this study appear to be relevant considering the critical roles played by PCs and MVBs recently demonstrated in tumourigenic processes.