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Menin orchestrates macrophage reprogramming to maintain the pulmonary immune homeostasis [RNA-seq]

ABSTRACT: Menin is a scaffold protein encoded by the Men1 gene, and it interacts with a variety of chromatin regulators to activate or repress cellular processes. The potential importance of menin in immune regulation remains unclear. Here, we report that myeloid deletion of Men1 results in the development of spontaneous pulmonary alveolar proteinosis (PAP). This is strongly correlated with impaired development of alveolar macrophages (AM) and epigenetic inactivation of the GM-CSF pathway caused by Men1 deficiency. Mechanistically, menin directly interacts with SETD2 through the NTD and Palm domains to maintain protein stability and chromatin recruitment. SETD2 and menin collectively maintain GM-CSF expression through H3K36me3, which orchestrates AM reprogramming and pulmonary immune homeostasis.

ORGANISM(S): Mus musculus

PROVIDER: GSE265805 | GEO | 2024/08/31

REPOSITORIES: GEO

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Project description:GM-CSF receptor-β deficient (Csf2rb–/– or KO) mice develop a lung disease identical to hereditary pulmonary alveolar proteinosis (hPAP) in humans with recessive CSF2RA or CSF2RB mutations that impair GM-CSF receptor function. We performed pulmonary macrophage transplantation (PMT) of bone marrow derived macrophages (BMDMs) without myeloablation in Csf2rb–/–mice. BMDMs were administered by endotracheal instillation into 2 month-old Csf2rb–/– mice. Results demonstrated that PMT therapeutic of hPAP in Csf2rb–/– mice was highly efficacious and durable. Alveolar macrophages were isolated by bronchoalveolar lavage one year after administration subjected to microarray analysis to determine the effects of PMT therapy on the global gene expression profile.

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Transcription repressor Bach2 is required for pulmonary surfactant homeostasis and alveolar macrophage function.

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