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Gene expression of wild-type and Nix-/-Bnip3-/- memory B cells

ABSTRACT: Gene expression of wild-type and Nix-/-Bnip3-/- memory B cells

PROVIDER: PRJNA734633 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR14713390_1.fastq.gz	Fastqsanger.gz
	SRR14713390_2.fastq.gz	Fastqsanger.gz
	SRR14713391_1.fastq.gz	Fastqsanger.gz
	SRR14713391_2.fastq.gz	Fastqsanger.gz
	SRR14713392_1.fastq.gz	Fastqsanger.gz

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Gene expression of wild-type and Nix-/-Bnip3-/- memory B cells

Project description:Memory B cells are long-lived lymphocytes essential for humoral immunological memory. Autophagy is required for the long-term survival of memory B cells, however, the molecular mechanisms for the protection by autophagy have not been fully elucidated. Here we show that mitochondrial autophagy mediated by Nix and Bnip3 prevents necroptosis in memory B cells by maintaining mitochondrial homeostasis and normal lipid metabolism. In mice with B cell-specific deletion of Nix and Bnip3, memory B cells showed significant increases in viable mitochondria and de novo fatty acid synthesis, with accumulation of lipid droplets in the cytoplasm and accelerated cell death. Inhibiting the mitochondrial citrate transporter Slc25a1 or silencing the necroptosis gene Ripk3 rescued Nix–/–Bnip3–/– memory B cells in vivo. These data indicate that Nix- and Bnip3-dependent mitochondrial autophagy in memory B cells is important for restricting de novo fatty acid synthesis and preventing necroptosis. Our results suggest a mechanism for autophagy in the maintenance of mitochondrial homeostasis for the protection of immunological memory.

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Project description:microRNA-150 (miR-150) is mainly expressed in the lymph nodes and spleen and is highly up-regulated during the development of mature T and B cells. To understand the signal-transduction network for 'effector or memory T cells' and 'mir-150' in naM-CM-/ve, effector, or memory CD8 T cells of mir-150 knockout and wild-type mice, we analyzed gene expression profiles by microarray. The genetic background of the cells used in this study is CD8 T cells from spleen of the 8 week-old male C57BL/6J mice (for female: WT-memory_2 & KO-memory_2). Corresponding authors: Inpyo Choi, PhD, Immunotherapy Research Center, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahak-ro,Yuseong, Daejeon 305-806, Republic of Korea. E-mail: ipchoi@kribb.re.kr. Or: Tae-Don Kim, PhD, Immunotherapy Research Center, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahak-ro, Yuseong, Daejeon 305-806, Republic of Korea. E-mail: tdkim@kribb.re.kr. wild-type[WT] vs. mir-150 knockout[KO]; naM-CM-/ve, effector, and memory CD8 T cells.

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