MicroRNAs (miRNAs or miRs) are approximately 22 nt single-stranded noncoding RNAs that control gene expression in eukaryotes. miRNAs play an essential role in all basic cellular processes including cell development, proliferation, differentiation, and apoptosis. Importantly, miRNAs regulate hematopoietic progenitor cells differentiation toward the different hematopoietic lineages. This occurs through the regulation of key factors involved in hematopoiesis (e.g., transcription factors, growth factor receptors). We, hereby, describe how to investigate the role of miRNAs in monocytopoiesis.
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http://dx.doi.org/10.1007/978-1-60761-811-9_11 | DOI Listing |
Int Immunol
March 2024
Division of Innate Immunity, Department of Microbiology and Immunology, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan.
In sarcoidosis, granulomas develop in multiple organs including the liver and lungs. Although mechanistic target of rapamycin complex 1 (mTORC1) activation in macrophages drives granuloma development in sarcoidosis by enhancing macrophage proliferation, little is known about the macrophage subsets that proliferate and mature into granuloma macrophages. Here, we show that aberrantly increased monocytopoiesis gives rise to granulomas in a sarcoidosis model, in which Tsc2, a negative regulator of mTORC1, is conditionally deleted in CSF1R-expressing macrophages (Tsc2csf1rΔ mice).
View Article and Find Full Text PDFDevelopment
December 2022
Research Institute of Intelligent Computing, Zhejiang Lab, Hangzhou, 311100, China.
Hematopoiesis is a highly coordinated process that generates all the body's blood cells, and perturbations in embryonic hematopoiesis may result in illnesses ranging from fetal anemia to various leukemias. Correct establishment of hematopoietic progenitor cell fate is essential for the development of adequate blood cell subpopulations, although regulators of cell fate commitment have not been fully defined. Here, we show that primary erythropoiesis and myelopoiesis in zebrafish embryos are synergistically regulated by blf and the drl cluster, as simultaneous depletion led to severe erythrocyte aplasia and excessive macrophage formation at the expense of neutrophil development.
View Article and Find Full Text PDFFront Immunol
October 2022
Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, Brazil.
Schistosomiasis is a neglected tropical disease caused by worms of the genus spp. The progression of disease results in intense tissue fibrosis and high mortality rate. After egg deposition by adult worms, the inflammatory response is characterized by the robust activation of type 2 immunity.
View Article and Find Full Text PDFFASEB J
October 2022
Division of Cardiology, Department of Internal Medicine II, Medical University of Vienna, Vienna, Austria.
Interleukin-4 (IL-4) and its receptors (IL-4R) promote the proliferation and polarization of macrophages. However, it is unknown if IL-4R also influences monocyte homeostasis and if steady state IL-4 levels are sufficient to affect monocytes. Employing full IL-4 receptor alpha knockout mice (IL-4Rα ) and mice with a myeloid-specific deletion of IL-4Rα (IL-4Rα LysM ), we show that IL-4 acts as a homeostatic factor regulating circulating monocyte numbers.
View Article and Find Full Text PDFNat Biotechnol
August 2022
Department of Chemistry, The University of Chicago, Chicago, IL, USA.
Functional studies of the RNA N-methyladenosine (mA) modification have been limited by an inability to map individual mA-modified sites in whole transcriptomes. To enable such studies, here, we introduce mA-selective allyl chemical labeling and sequencing (mA-SAC-seq), a method for quantitative, whole-transcriptome mapping of mA at single-nucleotide resolution. The method requires only ~30 ng of poly(A) or rRNA-depleted RNA.
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