GPR65 sensing tumor-derived lactate induces HMGB1 release from TAM via the cAMP/PKA/CREB pathway to promote glioma progression
Abstract Background Lactate has emerged as a critical regulator within the tumor microenvironment, including glioma. However, the precise mechanisms underlying how lactate influences the communication between tumor cells and tumor-associated macrophages (TAMs), the most abundant immune cells in glio...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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BMC
2024-04-01
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| Series: | Journal of Experimental & Clinical Cancer Research |
| Subjects: | |
| Online Access: | https://doi.org/10.1186/s13046-024-03025-8 |
| _version_ | 1797219490539241472 |
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| author | Chaolong Yan Zijiang Yang Pin Chen Yuyang Yeh Chongjing Sun Tao Xie Wei Huang Xiaobiao Zhang |
| author_facet | Chaolong Yan Zijiang Yang Pin Chen Yuyang Yeh Chongjing Sun Tao Xie Wei Huang Xiaobiao Zhang |
| author_sort | Chaolong Yan |
| collection | DOAJ |
| description | Abstract Background Lactate has emerged as a critical regulator within the tumor microenvironment, including glioma. However, the precise mechanisms underlying how lactate influences the communication between tumor cells and tumor-associated macrophages (TAMs), the most abundant immune cells in glioma, remain poorly understood. This study aims to elucidate the impact of tumor-derived lactate on TAMs and investigate the regulatory pathways governing TAM-mediated tumor-promotion in glioma. Methods Bioinformatic analysis was conducted using datasets from TCGA and CGGA. Single-cell RNA-seq datasets were analyzed by using UCSC Cell Browser and Single Cell Portal. Cell proliferation and mobility were evaluated through CCK8, colony formation, wound healing, and transwell assays. Western blot and immunofluorescence staining were applied to assess protein expression and cell distribution. RT-PCR and ELISA were employed to identify the potential secretory factors. Mechanistic pathways were explored by western blotting, ELISA, shRNA knockdown, and specific inhibitors and activators. The effects of pathway blockades were further assessed using subcutaneous and intracranial xenograft tumor models in vivo. Results Elevated expressions of LDHA and MCT1 were observed in glioma and exhibited a positive correlation with M2-type TAM infiltration. Lactate derived from glioma cells induced TAMs towards M2-subtype polarization, subsequently promoting glioma cells proliferation, migration, invasion, and mesenchymal transition. GPR65, highly expressed on TAMs, sensed lactate-stimulation in the TME, fueling glioma cells malignant progression through the secretion of HMGB1. GPR65 on TAMs triggered HMGB1 release in response to lactate stimulation via the cAMP/PKA/CREB signaling pathway. Disrupting this feedback loop by GPR65-knockdown or HMGB1 inhibition mitigated glioma progression in vivo. Conclusion These findings unveil the intricate interplay between TAMs and tumor cells mediated by lactate and HMGB1, driving tumor progression in glioma. GPR65, selectively highly expressed on TAMs in glioma, sensed lactate stimulation and fostered HMGB1 secretion via the cAMP/PKA/CREB signaling pathway. Blocking this feedback loop presents a promising therapeutic strategy for GBM. |
| first_indexed | 2024-04-24T12:34:29Z |
| format | Article |
| id | doaj.art-d8462d44bc8c4c69908356dc9618f57f |
| institution | Directory Open Access Journal |
| issn | 1756-9966 |
| language | English |
| last_indexed | 2024-04-24T12:34:29Z |
| publishDate | 2024-04-01 |
| publisher | BMC |
| record_format | Article |
| series | Journal of Experimental & Clinical Cancer Research |
| spelling | doaj.art-d8462d44bc8c4c69908356dc9618f57f2024-04-07T11:34:25ZengBMCJournal of Experimental & Clinical Cancer Research1756-99662024-04-0143111810.1186/s13046-024-03025-8GPR65 sensing tumor-derived lactate induces HMGB1 release from TAM via the cAMP/PKA/CREB pathway to promote glioma progressionChaolong Yan0Zijiang Yang1Pin Chen2Yuyang Yeh3Chongjing Sun4Tao Xie5Wei Huang6Xiaobiao Zhang7Department of Neurosurgery, Zhongshan Hospital, Fudan UniversityDepartment of Neurosurgery, Zhongshan Hospital, Fudan UniversityDepartment of Neurosurgery, Zhongshan Hospital, Fudan UniversityDepartment of Neurosurgery, Zhongshan Hospital, Fudan UniversityDepartment of Neurosurgery, Zhongshan Hospital, Fudan UniversityDepartment of Neurosurgery, Zhongshan Hospital, Fudan UniversityState Key Laboratory of Neuroscience, Institute of Neuroscience, Center for Excellence in Brain Science and Intelligence Technology, Chinese Academy of SciencesDepartment of Neurosurgery, Zhongshan Hospital, Fudan UniversityAbstract Background Lactate has emerged as a critical regulator within the tumor microenvironment, including glioma. However, the precise mechanisms underlying how lactate influences the communication between tumor cells and tumor-associated macrophages (TAMs), the most abundant immune cells in glioma, remain poorly understood. This study aims to elucidate the impact of tumor-derived lactate on TAMs and investigate the regulatory pathways governing TAM-mediated tumor-promotion in glioma. Methods Bioinformatic analysis was conducted using datasets from TCGA and CGGA. Single-cell RNA-seq datasets were analyzed by using UCSC Cell Browser and Single Cell Portal. Cell proliferation and mobility were evaluated through CCK8, colony formation, wound healing, and transwell assays. Western blot and immunofluorescence staining were applied to assess protein expression and cell distribution. RT-PCR and ELISA were employed to identify the potential secretory factors. Mechanistic pathways were explored by western blotting, ELISA, shRNA knockdown, and specific inhibitors and activators. The effects of pathway blockades were further assessed using subcutaneous and intracranial xenograft tumor models in vivo. Results Elevated expressions of LDHA and MCT1 were observed in glioma and exhibited a positive correlation with M2-type TAM infiltration. Lactate derived from glioma cells induced TAMs towards M2-subtype polarization, subsequently promoting glioma cells proliferation, migration, invasion, and mesenchymal transition. GPR65, highly expressed on TAMs, sensed lactate-stimulation in the TME, fueling glioma cells malignant progression through the secretion of HMGB1. GPR65 on TAMs triggered HMGB1 release in response to lactate stimulation via the cAMP/PKA/CREB signaling pathway. Disrupting this feedback loop by GPR65-knockdown or HMGB1 inhibition mitigated glioma progression in vivo. Conclusion These findings unveil the intricate interplay between TAMs and tumor cells mediated by lactate and HMGB1, driving tumor progression in glioma. GPR65, selectively highly expressed on TAMs in glioma, sensed lactate stimulation and fostered HMGB1 secretion via the cAMP/PKA/CREB signaling pathway. Blocking this feedback loop presents a promising therapeutic strategy for GBM.https://doi.org/10.1186/s13046-024-03025-8GliomaLactateTumor-associated macrophage (TAM)GPR65HMGB1 |
| spellingShingle | Chaolong Yan Zijiang Yang Pin Chen Yuyang Yeh Chongjing Sun Tao Xie Wei Huang Xiaobiao Zhang GPR65 sensing tumor-derived lactate induces HMGB1 release from TAM via the cAMP/PKA/CREB pathway to promote glioma progression Journal of Experimental & Clinical Cancer Research Glioma Lactate Tumor-associated macrophage (TAM) GPR65 HMGB1 |
| title | GPR65 sensing tumor-derived lactate induces HMGB1 release from TAM via the cAMP/PKA/CREB pathway to promote glioma progression |
| title_full | GPR65 sensing tumor-derived lactate induces HMGB1 release from TAM via the cAMP/PKA/CREB pathway to promote glioma progression |
| title_fullStr | GPR65 sensing tumor-derived lactate induces HMGB1 release from TAM via the cAMP/PKA/CREB pathway to promote glioma progression |
| title_full_unstemmed | GPR65 sensing tumor-derived lactate induces HMGB1 release from TAM via the cAMP/PKA/CREB pathway to promote glioma progression |
| title_short | GPR65 sensing tumor-derived lactate induces HMGB1 release from TAM via the cAMP/PKA/CREB pathway to promote glioma progression |
| title_sort | gpr65 sensing tumor derived lactate induces hmgb1 release from tam via the camp pka creb pathway to promote glioma progression |
| topic | Glioma Lactate Tumor-associated macrophage (TAM) GPR65 HMGB1 |
| url | https://doi.org/10.1186/s13046-024-03025-8 |
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