Joanna Bogusławska, Małgorzata Grzanka, Piotr Popławski, Weronika Zarychta-Wiśniewska, Anna Burdzinska, Karolina Hanusek, Helena Kossowska, Roksana Iwanicka-Nowicka, Alex Białas, Beata Rybicka, Anna Adamiok-Ostrowska, Joanna Życka-Krzesińska, Marta Koblowska, Leszek Pączek, Agnieszka Piekiełko-Witkowska
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引用次数: 0
Abstract
Background: Renal cell cancer (RCC) is the most common and highly malignant subtype of kidney cancer. Mesenchymal stromal cells (MSCs) are components of tumor microenvironment (TME) that influence RCC progression. The impact of RCC-secreted small non-coding RNAs (sncRNAs) on TME is largely underexplored. Here, we comprehensively analysed the composition of exosomal sncRNAs secreted by RCC cells to identify those that influence MSCs.
Methods: Exosomal sncRNAs secreted by RCC cells and normal kidney cells were analyzed using RNAseq, followed by qPCR validation. MSCs were treated by conditioned media (CM) derived from RCC cells and transfected with piRNA, followed by the analysis of proliferation, viability, migration and immunocytochemical detection of piRNA. Expression of MSCs genes was evaluated using microarray and qPCR. TCGA data were analyzed to explore the expression of sncRNAs in RCC tumors.
Results: RNAseq revealed 40 miRNAs, 71 tRNAs and four piRNAs that were consistently secreted by RCC cells. qPCR validation using five independent RCC cell lines confirmed that expressions of miR-10b-3p and miR-125a-5p were suppressed, while miR-365b-3p was upregulated in exosomes from RCC cells when compared with normal kidney proximal tubules. The expression of miR-10b-3p and miR-125a-5p was decreased, whereas the expression of miR-365b-3p was increased in RCC tumors and correlated with poor survival of patients. Expressions of tRNA-Glu, tRNA-Gly, and tRNA-Val were the most increased, while tRNA-Gln, tRNA-Leu, and tRNA-Lys were top decreased in RCC exosomes when compared with normal kidney cells. Moreover, hsa_piR_004153, hsa_piR_016735, hsa_piR_019521, and hsa_piR_020365 were consistently upregulated in RCC exosomes. piR_004153 (DQ575660.1; aliases: hsa_piRNA_18299, piR-43772, piR-hsa-5938) was the most highly expressed in exosomes from RCC cells when compared with normal kidney cells. Treatment of MSCs with RCC CM resulted in upregulation of piR_004153 expression. Transfection of MSCs with piR_004153 stimulated their migration and viability, and altered expression of 35 genes, including downregulation of FGF2, SLC7A5, and WISP1. Immunocytochemistry confirmed the nuclear localization of piR_004153 transfected in MSCs.
Conclusion: RCC cells secrete multiple sncRNAs, including piR_004153 which targets MSCs, alters expression of FGF2, SLC7A5, and WISP1, and stimulates their motility and viability. To our knowledge, this is the first study showing that cancer-derived piRNA can enhance MSC migration.
期刊介绍：
Cell Communication and Signaling (CCS) is a peer-reviewed, open-access scientific journal that focuses on cellular signaling pathways in both normal and pathological conditions. It publishes original research, reviews, and commentaries, welcoming studies that utilize molecular, morphological, biochemical, structural, and cell biology approaches. CCS also encourages interdisciplinary work and innovative models, including in silico, in vitro, and in vivo approaches, to facilitate investigations of cell signaling pathways, networks, and behavior.
Starting from January 2019, CCS is proud to announce its affiliation with the International Cell Death Society. The journal now encourages submissions covering all aspects of cell death, including apoptotic and non-apoptotic mechanisms, cell death in model systems, autophagy, clearance of dying cells, and the immunological and pathological consequences of dying cells in the tissue microenvironment.
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