Synergy between pluripotent stem cell-derived macrophages and self-renewing macrophages: Envisioning a promising avenue for the modelling and cell therapy of infectious diseases

Abstract

As crucial phagocytes of the innate immune system, macrophages (Mϕs) protect mammalian hosts, maintain tissue homeostasis and influence disease pathogenesis. Nonetheless, Mϕs are susceptible to various pathogens, including bacteria, viruses and parasites, which cause various infectious diseases, necessitating a deeper understanding of pathogen–Mϕ interactions and therapeutic insights. Pluripotent stem cells (PSCs) have been efficiently differentiated into PSC-derived Mϕs (PSCdMϕs) resembling primary Mϕs, advancing the modelling and cell therapy of infectious diseases. However, the mass production of PSCdMϕs, which lack proliferative capacity, relies on large-scale expansions of PSCs, thereby increasing both costs and culture cycles. Notably, Mϕs deficient in the MafB/c-Maf genes have been reported to re-enter the cell cycle with the stimulation of specific growth factor cocktails, turning into self-renewing Mϕs (SRMϕs). This review summarizes the applications of PSCdMϕs in the modelling and cell therapy of infectious diseases and strategies for establishing SRMϕs. Most importantly, we innovatively propose that PSCs can serve as a gene editing platform to creating PSC-derived SRMϕs (termed PSRMϕs), addressing the resistance of Mϕs against genetic manipulation. We discuss the challenges and possible solutions in creating PSRMϕs. In conclusion, this review provides novel insights into the development of physiologically relevant and expandable Mϕ models, highlighting the enormous potential of PSRMϕs as a promising avenue for the modelling and cell therapy of infectious diseases.

Keywords

differentiation / infectious diseases / macrophages / pluripotent stem cells / self-renewal

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2024 The Author(s). Cell Proliferation published by Beijing Institute for Stem Cell and Regenerative Medicine and John Wiley & Sons Ltd.