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Zhou YT, Yu YQ, Yang H, Yang H, Huo YF, Huang Y, Tian XX, Fang WG. Extracellular ATP promotes angiogenesis and adhesion of TNBC cells to endothelial cells via up-regulation of CTGF. Cancer Sci 2022; 113:2457-2471. [PMID: 35441763 PMCID: PMC9277410 DOI: 10.1111/cas.15375] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 04/07/2022] [Accepted: 04/12/2022] [Indexed: 12/01/2022] Open
Abstract
Our previous works have indicated that extracellular ATP is an important prometastasis factor. However, the molecular mechanism involved needs to be further studied. We demonstrated that extracellular ATP treatment could upregulate the expression of connective tissue growth factor (CTGF) in both triple‐negative breast cancer (TNBC) cells and endothelial cells (ECs). Extracellular ATP stimulated the migration of TNBC cells and ECs, and angiogenesis of ECs via the P2Y2––YAP‐CTGF axis. Furthermore, we demonstrated that adenosine triphosphate (ATP) stimulated TNBC cell adhesion to ECs and transmigration through the EC layer via CTGF by upregulation of integrin β1 on TNBC cells and VCAM‐1 on ECs. Both apyrase (ATP‐diphosphohydrolase) and CTGF shRNA treatments could inhibit the metastasis of inoculated tumors to lung and liver in a mouse model, and these treated tumors had fewer blood vessels. Collectively, our data indicated that extracellular ATP promotes tumor angiogenesis and the interactions between TNBC cells and ECs through upregulation of CTGF, thereby stimulating TNBC metastasis. The pleiotropic effects of ATP in angiogenesis and cell adhesion suggest that extracellular ATP or CTGF could be an effective target for TNBC therapy.
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Affiliation(s)
- Yan-Ting Zhou
- Department of Pathology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), School of Basic Medical Sciences, Peking University Third Hospital, Peking University Health Science Center, Beijing, 100191, China
| | - Yu-Qing Yu
- Department of Pathology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), School of Basic Medical Sciences, Peking University Third Hospital, Peking University Health Science Center, Beijing, 100191, China
| | - Hui Yang
- Department of Pathology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), School of Basic Medical Sciences, Peking University Third Hospital, Peking University Health Science Center, Beijing, 100191, China
| | - Han Yang
- Department of Pathology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), School of Basic Medical Sciences, Peking University Third Hospital, Peking University Health Science Center, Beijing, 100191, China
| | - Yan-Fei Huo
- Department of Pathology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), School of Basic Medical Sciences, Peking University Third Hospital, Peking University Health Science Center, Beijing, 100191, China
| | - Yang Huang
- Department of Pathology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), School of Basic Medical Sciences, Peking University Third Hospital, Peking University Health Science Center, Beijing, 100191, China
| | - Xin-Xia Tian
- Department of Pathology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), School of Basic Medical Sciences, Peking University Third Hospital, Peking University Health Science Center, Beijing, 100191, China
| | - Wei-Gang Fang
- Department of Pathology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), School of Basic Medical Sciences, Peking University Third Hospital, Peking University Health Science Center, Beijing, 100191, China
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Tamura N, Oku M, Sakai Y. Atg21 regulates pexophagy via its PI(3)P-binding activity in Pichia pastoris. FEMS Yeast Res 2014; 14:435-44. [PMID: 24373415 DOI: 10.1111/1567-1364.12132] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2013] [Revised: 11/19/2013] [Accepted: 12/16/2013] [Indexed: 01/28/2023] Open
Abstract
Pexophagy is a selective degradation pathway of peroxisomes. In the present study, we revealed that PpAtg21 was required for pexophagy in the methylotrophic yeast Pichia pastoris. PpAtg21 was essential for efficient lipidation of Atg8 and for de novo synthesis of pexophagic membranes. In contrast to PpAtg18, PpAtg21 was not necessary for vacuolar fission nor invagination during micropexophagy. PpAtg21 specifically bound to PI(3)P, but not to PI(3,5)P2 in vitro, and the localization analyses matched with this phosphoinositide-binding specificity. The mutant which lost the lipid-binding activity showed defect in pexophagy, suggesting that PI(3)P-binding activity of PpAtg21 was required for pexophagy.
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Affiliation(s)
- Naoki Tamura
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kyoto, Japan
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Nishizaki C, Nishikawa M, Yata T, Yamada T, Takahashi Y, Oku M, Yurimoto H, Sakai Y, Nakanishi K, Takakura Y. Inhibition of surgical trauma-enhanced peritoneal dissemination of tumor cells by human catalase derivatives in mice. Free Radic Biol Med 2011; 51:773-9. [PMID: 21664457 DOI: 10.1016/j.freeradbiomed.2011.05.025] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2011] [Revised: 05/19/2011] [Accepted: 05/20/2011] [Indexed: 11/20/2022]
Abstract
Surgical trauma, which is inevitably associated with the surgical removal of cancer, has been reported to accelerate tumor metastasis. The close association of reactive oxygen species with the trauma and tumor metastasis supports the possibility of using antioxidants for the inhibition of metastasis. To inhibit surgical trauma-enhanced peritoneal dissemination, human catalase (hCAT) derivatives, i.e., hCAT-nona-arginine peptide (hCAT-R9) and hCAT-albumin-binding peptide (hCAT-ABP), were designed to increase the retention time of the antioxidant enzyme in the abdominal cavity after intraperitoneal administration. Both (125)I-labeled derivatives showed significantly prolonged retention in the cavity compared to (125)I-hCAT. Cauterization of the cecum of mice with a hot iron, an experimental model of surgical trauma, induced abdominal adhesions. In addition, cauterization followed by colon26 tumor cell inoculation increased lipid peroxidation in the cecum and mRNA expression of molecules associated with tissue repair/adhesion and inflammation in the peritoneum. hCAT derivatives significantly suppressed the increased mRNA expression. The cauterization also increased the number of tumor cells in the abdominal organs, and the number was significantly reduced by hCAT-R9 or hCAT-ABP. These results indicate that hCAT-R9 and hCAT-ABP, both of which have a long retention time in the peritoneal cavity, can be effective at inhibiting surgery-induced peritoneal metastasis.
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Affiliation(s)
- Chika Nishizaki
- Department of Biopharmaceutics and Drug Metabolism, Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
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