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MCP-1 production regulated by ATG5 in inflammatory monocytes selectively modulates anti-malarial CD4+ Th1 response

ABSTRACT: MCP-1 production regulated by ATG5 in inflammatory monocytes selectively modulates anti-malarial CD4+ Th1 response

PROVIDER: PRJNA949962 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR24003400_1.fastq.gz	Fastqsanger.gz
	SRR24003400_2.fastq.gz	Fastqsanger.gz
	SRR24003401_1.fastq.gz	Fastqsanger.gz
	SRR24003401_2.fastq.gz	Fastqsanger.gz
	SRR24003402_1.fastq.gz	Fastqsanger.gz

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ATG5-regulated MCP-1 production in myeloid cells selectively modulates anti-malarial CD4+ Th1 responses

Project description:Induction of parasite-specific CD4+ Th1 cell responses is a promising strategy for designing effective blood-stage malaria vaccines; however, the underlying regulatory mechanisms remain largely unknown. This study demonstrated that ATG5 deficiency in myeloid cells can significantly inhibit the growth of rodent blood-stage malarial parasites by enhancing parasite-specific CD4+ Th1 cell responses. This effect was independent of ATG5-mediated canonical and non-canonical autophagy. Mechanistically, ATG5 deficiency promoted myeloid cell (Ly6G-CD11b+F4/80-) survival and subsequently increased MCP-1 production in parasite-infected mice. Ly6G-CD11b+F4/80- cell-derived MCP-1 interacted with CCR2 on CD4+ Th1 cells for their optimized responses through the JAK2/STAT4 pathway. Notably, recombinant MCP-1 significantly improved parasite-specific CD4+ Th1 responses of the whole-killed blood-stage vaccine. Conclusively, our study highlights the previously unrecognized role of ATG5 in modulating myeloid cell survival via MCP-1 production, which selectively promotes CD4+ Th1 cell responses. Our findings provide new insights into the development of effective antimalarial vaccines.

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MCP-1 production regulated by ATG5 in inflammatory monocytes selectively modulates anti-malarial CD4+ Th1 response

Project description:A promising strategy to design effective malaria blood-stage vaccines is to induce parasite-specific CD4+ Th1 cell responses, but the regulatory mechanism of which is still largely unknown. Here, we showed that the ATG5-deficiency in myeloid cells significantly inhibit the growth of rodent blood-stage malaria parasites through specifically enhancing parasite-specific CD4+ Th1 cell responses. This effect was independent of ATG5-mediated canonical autophagy and non-canonical autophagy. Mechanistically, the deficiency of ATG5 promoted the survival of inflammatory monocytes (CD11b+F4/80- cells), and sequentially increased the generation of chemokine MCP-1 in parasite-infected mice. The interaction of CD11b+F4/80- cells-derived MCP-1 with CCR2 on CD4+ Th1 cells for its optimized differentiation dependent on Jak2/stat4 pathway. Therefore, we highlight the previously unrecognized role of ATG5 in the modulation of the survival of inflammatory monocytes to produce MCP-1, and the selective promoting effect of MCP-1 on CD4+ Th1 cell differentiation, which shed new lights on effective malaria vaccine designation.

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ATG5-regulated MCP-1 production in myeloid cells selectively modulates anti-malarial CD4+ Th1 responses

Project description:ATG5-regulated MCP-1 production in myeloid cells selectively modulates anti-malarial CD4+ Th1 responses

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ATG5-regulated CCL2/MCP-1 production in myeloid cells selectively modulates anti-malarial CD4<sup>+</sup> Th1 responses.

Project description:Parasite-specific CD4+ Th1 cell responses are the predominant immune effector for controlling malaria infection; however, the underlying regulatory mechanisms remain largely unknown. This study demonstrated that ATG5 deficiency in myeloid cells can significantly inhibit the growth of rodent blood-stage malarial parasites by selectively enhancing parasite-specific CD4+ Th1 cell responses. This effect was independent of ATG5-mediated canonical and non-canonical autophagy. Mechanistically, ATG5 deficiency suppressed FAS-mediated apoptosis of LY6G- ITGAM/CD11b+ ADGRE1/F4/80- cells and subsequently increased CCL2/MCP-1 production in parasite-infected mice. LY6G- ITGAM+ ADGRE1- cell-derived CCL2 selectively interacted with CCR2 on CD4+ Th1 cells for their optimized responses through the JAK2-STAT4 pathway. The administration of recombinant CCL2 significantly promoted parasite-specific CD4+ Th1 responses and suppressed malaria infection. Conclusively, our study highlights the previously unrecognized role of ATG5 in modulating myeloid cells apoptosis and sequentially affecting CCL2 production, which selectively promotes CD4+ Th1 cell responses. Our findings provide new insights into the development of immune interventions and effective anti-malarial vaccines.Abbreviations: ATG5: autophagy related 5; CBA: cytometric bead array; CCL2/MCP-1: C-C motif chemokine ligand 2; IgG: immunoglobulin G; IL6: interleukin 6; IL10: interleukin 10; IL12: interleukin 12; MFI: mean fluorescence intensity; JAK2: Janus kinase 2; LAP: LC3-associated phagocytosis; MAP1LC3/LC3: microtubule-associated protein 1 light chain 3; pRBCs: parasitized red blood cells; RUBCN: RUN domain and cysteine-rich domain containing, Beclin 1-interacting protein; STAT4: signal transducer and activator of transcription 4; Th1: T helper 1 cell; Tfh: follicular helper cell; ULK1: unc-51 like kinase 1.

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