Nuclear respiratory factor-1 (NRF1) induction as a powerful strategy to deter mitochondrial dysfunction and senescence in mesenchymal stem cells.
Abstract
Mesenchymal stem cells (MSCs) are promising candidates for regenerative therapies due to their self-renewal and differentiation capabilities. Pathological microenvironments expose MSCs to senescence-inducing factors such as reactive oxygen species (ROS), resulting in MSC functional decline and loss of stemness. Oxidative stress leads to mitochondrial dysfunction, a hallmark of senescence, and is prevalent in aging tissues characterized by elevated ROS levels. We hypothesized that overexpression of nuclear respiratory factor-1 (NRF1), a driver of mitochondrial biogenesis, could metabolically potentiate MSCs and prevent MSC senescence. Single-cell RNA sequencing (scRNA-Seq) revealed that MSCs transfected with NRF1 messenger RNA (mRNA) exhibited upregulated expression of genes associated with oxidative phosphorylation (OXPHOS), decreased glycolytic markers, and suppression of senescence-related pathways. To test whether NRF1 induction could mitigate stress-induced premature senescence, we exposed MSCs to hydrogen peroxide (H
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Research summary
The paper addresses the induction of NRF1 to combat mitochondrial dysfunction and senescence in mesenchymal stem cells, which is directly related to the mechanisms of aging and cellular senescence. By focusing on mitochondrial biogenesis and oxidative stress, it contributes to understanding potential interventions for age-related decline in stem cell function. However, while the findings are solid, they represent an incremental advance rather than a groundbreaking discovery, limiting the overall impact.
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