PMID- 28642617 OWN - NLM STAT- MEDLINE DCOM- 20181231 LR - 20181231 IS - 2045-2322 (Electronic) IS - 2045-2322 (Linking) VI - 7 IP - 1 DP - 2017 Jun 22 TI - Podoplanin enhances lung cancer cell growth in vivo by inducing platelet aggregation. PG - 4059 LID - 10.1038/s41598-017-04324-1 [doi] LID - 4059 AB - Podoplanin/Aggrus, known as a platelet aggregation-inducing factor, is frequently overexpressed in lung squamous cell carcinomas (LSCC) and glioblastomas among other tumours, and its expression has been reported to be correlated with poor prognosis. However, the contribution of podoplanin to malignant progression has been elusive. Here we demonstrate that in podoplanin-positive LSCC cells, their growth was abrogated by podoplanin knockout in vivo but not in vitro. Conversely, ectopic expression of podoplanin promoted cell growth in vivo and facilitated intratumoral platelet activation. Consistently, LSCC cells evoked podoplanin-mediated platelet aggregation (PMPA), and the releasates from platelets during PMPA promoted the growth of LSCC cells in vitro. Phospho-receptor-tyrosine-kinase array analysis revealed that epidermal growth factor receptor (EGFR) phosphorylation of LSCC cells was responsible for the growth promotion induced by platelet releasates. Treatment with an antiplatelet agent or podoplanin-neutralizing antibody depressed the growth of an LSCC tumour xenograft via suppression of EGFR phosphorylation. These results suggested that podoplanin in LSCC enhanced cell growth by inducing PMPA in vivo and contributed to malignant progression. FAU - Miyata, Kenichi AU - Miyata K AD - Division of Experimental Chemotherapy, The Cancer Chemotherapy Center, Japanese Foundation for Cancer Research, 3-8-31, Ariake, Koto-ku, Tokyo, 135-8550, Japan. AD - Department of Computational Biology and Medical Sciences, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5, Kashiwanoha, Kashiwa-shi, Chiba, 277-8561, Japan. FAU - Takemoto, Ai AU - Takemoto A AD - Division of Experimental Chemotherapy, The Cancer Chemotherapy Center, Japanese Foundation for Cancer Research, 3-8-31, Ariake, Koto-ku, Tokyo, 135-8550, Japan. FAU - Okumura, Sakae AU - Okumura S AD - Thoracic Oncology Center, Cancer Institute Hospital, Japanese Foundation for Cancer Research, 3-8-31, Ariake, Koto-ku, Tokyo, 1350-8550, Japan. FAU - Nishio, Makoto AU - Nishio M AD - Thoracic Oncology Center, Cancer Institute Hospital, Japanese Foundation for Cancer Research, 3-8-31, Ariake, Koto-ku, Tokyo, 1350-8550, Japan. FAU - Fujita, Naoya AU - Fujita N AD - Division of Experimental Chemotherapy, The Cancer Chemotherapy Center, Japanese Foundation for Cancer Research, 3-8-31, Ariake, Koto-ku, Tokyo, 135-8550, Japan. naoya.fujita@jfcr.or.jp. AD - Department of Computational Biology and Medical Sciences, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5, Kashiwanoha, Kashiwa-shi, Chiba, 277-8561, Japan. naoya.fujita@jfcr.or.jp. AD - The Cancer Chemotherapy Center, Japanese Foundation for Cancer Research, 3-8-31, Ariake, Koto-ku, Tokyo, 135-8550, Japan. naoya.fujita@jfcr.or.jp. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20170622 PL - England TA - Sci Rep JT - Scientific reports JID - 101563288 RN - 0 (Biomarkers) RN - 0 (Membrane Glycoproteins) RN - 0 (PDPN protein, human) RN - 0 (Protein Kinase Inhibitors) RN - EC 2.7.10.1 (ErbB Receptors) SB - IM MH - Animals MH - Biomarkers MH - Blood Platelets/*metabolism MH - Cell Line, Tumor MH - Cell Proliferation/drug effects MH - Disease Models, Animal MH - ErbB Receptors/antagonists & inhibitors/metabolism MH - Female MH - Humans MH - Immunohistochemistry MH - Lung Neoplasms/*blood/*metabolism MH - Membrane Glycoproteins/*metabolism/pharmacology MH - Mice MH - *Platelet Aggregation/drug effects MH - Protein Kinase Inhibitors/pharmacology MH - Signal Transduction/drug effects MH - Xenograft Model Antitumor Assays PMC - PMC5481446 COIS- The authors declare that they have no competing interests. EDAT- 2017/06/24 06:00 MHDA- 2019/01/01 06:00 PMCR- 2017/06/22 CRDT- 2017/06/24 06:00 PHST- 2016/09/09 00:00 [received] PHST- 2017/05/12 00:00 [accepted] PHST- 2017/06/24 06:00 [entrez] PHST- 2017/06/24 06:00 [pubmed] PHST- 2019/01/01 06:00 [medline] PHST- 2017/06/22 00:00 [pmc-release] AID - 10.1038/s41598-017-04324-1 [pii] AID - 4324 [pii] AID - 10.1038/s41598-017-04324-1 [doi] PST - epublish SO - Sci Rep. 2017 Jun 22;7(1):4059. doi: 10.1038/s41598-017-04324-1.