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LPA1-mediated inhibition of CXCR4 attenuates CXCL12-induced signaling and cell migration
BACKGROUND: G protein-coupled receptor heteromerization is believed to exert dynamic regulatory impact on signal transduction. CXC chemokine receptor 4 (CXCR4) and its ligand CXCL12, both of which are overexpressed in many cancers, play a pivotal role in metastasis. Likewise, lysophosphatidic acid r...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
BioMed Central
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10518940/ https://www.ncbi.nlm.nih.gov/pubmed/37749552 http://dx.doi.org/10.1186/s12964-023-01261-7 |
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author | Hong, Jong Min Lee, Jin-Woo Seen, Dong-Seung Jeong, Jae-Yeon Huh, Won-Ki |
author_facet | Hong, Jong Min Lee, Jin-Woo Seen, Dong-Seung Jeong, Jae-Yeon Huh, Won-Ki |
author_sort | Hong, Jong Min |
collection | PubMed |
description | BACKGROUND: G protein-coupled receptor heteromerization is believed to exert dynamic regulatory impact on signal transduction. CXC chemokine receptor 4 (CXCR4) and its ligand CXCL12, both of which are overexpressed in many cancers, play a pivotal role in metastasis. Likewise, lysophosphatidic acid receptor 1 (LPA(1)) is implicated in cancer cell proliferation and migration. In our preliminary study, we identified LPA(1) as a prospective CXCR4 interactor. In the present study, we investigated in detail the formation of the CXCR4-LPA(1) heteromer and characterized the unique molecular features and function of this heteromer. METHODS: We employed bimolecular fluorescence complementation, bioluminescence resonance energy transfer, and proximity ligation assays to demonstrate heteromerization between CXCR4 and LPA(1). To elucidate the distinctive molecular characteristics and functional implications of the CXCR4-LPA(1) heteromer, we performed various assays, including cAMP, BRET for G protein activation, β-arrestin recruitment, ligand binding, and transwell migration assays. RESULTS: We observed that CXCR4 forms heteromers with LPA(1) in recombinant HEK293A cells and the human breast cancer cell line MDA-MB-231. Coexpression of LPA(1) with CXCR4 reduced CXCL12-mediated cAMP inhibition, ERK activation, Gα(i/o) activation, and β-arrestin recruitment, while CXCL12 binding to CXCR4 remained unaffected. In contrast, CXCR4 had no impact on LPA(1)-mediated signaling. The addition of lysophosphatidic acid (LPA) further hindered CXCL12-induced Gα(i/o) recruitment to CXCR4. LPA or alkyl-OMPT inhibited CXCL12-induced migration in various cancer cells that endogenously express both CXCR4 and LPA(1). Conversely, CXCL12-induced calcium signaling and migration were increased in LPAR1 knockout cells, and LPA(1)-selective antagonists enhanced CXCL12-induced Gα(i/o) signaling and cell migration in the parental MDA-MB-231 cells but not in LPA(1)-deficient cells. Ultimately, complete inhibition of cell migration toward CXCL12 and alkyl-OMPT was only achieved in the presence of both CXCR4 and LPA(1) antagonists. CONCLUSIONS: The presence and impact of CXCR4-LPA(1) heteromers on CXCL12-induced signaling and cell migration have been evidenced across various cell lines. This discovery provides crucial insights into a valuable regulatory mechanism of CXCR4 through heteromerization. Moreover, our findings propose a therapeutic potential in combined CXCR4 and LPA(1) inhibitors for cancer and inflammatory diseases associated with these receptors, simultaneously raising concerns about the use of LPA(1) antagonists alone for such conditions. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1186/s12964-023-01261-7. |
format | Online Article Text |
id | pubmed-10518940 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | BioMed Central |
record_format | MEDLINE/PubMed |
spelling | pubmed-105189402023-09-26 LPA1-mediated inhibition of CXCR4 attenuates CXCL12-induced signaling and cell migration Hong, Jong Min Lee, Jin-Woo Seen, Dong-Seung Jeong, Jae-Yeon Huh, Won-Ki Cell Commun Signal Research BACKGROUND: G protein-coupled receptor heteromerization is believed to exert dynamic regulatory impact on signal transduction. CXC chemokine receptor 4 (CXCR4) and its ligand CXCL12, both of which are overexpressed in many cancers, play a pivotal role in metastasis. Likewise, lysophosphatidic acid receptor 1 (LPA(1)) is implicated in cancer cell proliferation and migration. In our preliminary study, we identified LPA(1) as a prospective CXCR4 interactor. In the present study, we investigated in detail the formation of the CXCR4-LPA(1) heteromer and characterized the unique molecular features and function of this heteromer. METHODS: We employed bimolecular fluorescence complementation, bioluminescence resonance energy transfer, and proximity ligation assays to demonstrate heteromerization between CXCR4 and LPA(1). To elucidate the distinctive molecular characteristics and functional implications of the CXCR4-LPA(1) heteromer, we performed various assays, including cAMP, BRET for G protein activation, β-arrestin recruitment, ligand binding, and transwell migration assays. RESULTS: We observed that CXCR4 forms heteromers with LPA(1) in recombinant HEK293A cells and the human breast cancer cell line MDA-MB-231. Coexpression of LPA(1) with CXCR4 reduced CXCL12-mediated cAMP inhibition, ERK activation, Gα(i/o) activation, and β-arrestin recruitment, while CXCL12 binding to CXCR4 remained unaffected. In contrast, CXCR4 had no impact on LPA(1)-mediated signaling. The addition of lysophosphatidic acid (LPA) further hindered CXCL12-induced Gα(i/o) recruitment to CXCR4. LPA or alkyl-OMPT inhibited CXCL12-induced migration in various cancer cells that endogenously express both CXCR4 and LPA(1). Conversely, CXCL12-induced calcium signaling and migration were increased in LPAR1 knockout cells, and LPA(1)-selective antagonists enhanced CXCL12-induced Gα(i/o) signaling and cell migration in the parental MDA-MB-231 cells but not in LPA(1)-deficient cells. Ultimately, complete inhibition of cell migration toward CXCL12 and alkyl-OMPT was only achieved in the presence of both CXCR4 and LPA(1) antagonists. CONCLUSIONS: The presence and impact of CXCR4-LPA(1) heteromers on CXCL12-induced signaling and cell migration have been evidenced across various cell lines. This discovery provides crucial insights into a valuable regulatory mechanism of CXCR4 through heteromerization. Moreover, our findings propose a therapeutic potential in combined CXCR4 and LPA(1) inhibitors for cancer and inflammatory diseases associated with these receptors, simultaneously raising concerns about the use of LPA(1) antagonists alone for such conditions. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1186/s12964-023-01261-7. BioMed Central 2023-09-25 /pmc/articles/PMC10518940/ /pubmed/37749552 http://dx.doi.org/10.1186/s12964-023-01261-7 Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/ (https://creativecommons.org/publicdomain/zero/1.0/) ) applies to the data made available in this article, unless otherwise stated in a credit line to the data. |
spellingShingle | Research Hong, Jong Min Lee, Jin-Woo Seen, Dong-Seung Jeong, Jae-Yeon Huh, Won-Ki LPA1-mediated inhibition of CXCR4 attenuates CXCL12-induced signaling and cell migration |
title | LPA1-mediated inhibition of CXCR4 attenuates CXCL12-induced signaling and cell migration |
title_full | LPA1-mediated inhibition of CXCR4 attenuates CXCL12-induced signaling and cell migration |
title_fullStr | LPA1-mediated inhibition of CXCR4 attenuates CXCL12-induced signaling and cell migration |
title_full_unstemmed | LPA1-mediated inhibition of CXCR4 attenuates CXCL12-induced signaling and cell migration |
title_short | LPA1-mediated inhibition of CXCR4 attenuates CXCL12-induced signaling and cell migration |
title_sort | lpa1-mediated inhibition of cxcr4 attenuates cxcl12-induced signaling and cell migration |
topic | Research |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10518940/ https://www.ncbi.nlm.nih.gov/pubmed/37749552 http://dx.doi.org/10.1186/s12964-023-01261-7 |
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