USP22 and SPI1 in oxidative stress-induced senescence of rat and cell-culture BMSCs
In this abstract, H2O2-treated bone marrow mesenchymal stem cells (BMSCs) and an ovariectomy rat model showed lower SPI1; overexpressing SPI1 or USP22 reduced senescence markers and preserved osteogenic differentiation in cells, with SPI1 knockdown reversing USP22 effects. [1]
Automatic summary · not editorially reviewed
The key findings
SPI1 expression was lower in H2O2-treated BMSCs and in the ovariectomy-induced osteoporotic rat model. [1]
SPI1 overexpression rescued H2O2-induced BMSC senescence and impaired osteogenic differentiation, reportedly by activating NAMPT transcription and raising NAD. [1]
USP22 overexpression alleviated oxidative stress-induced BMSC senescence and osteogenic impairment, and SPI1 knockdown reversed these effects. [1]
The source at a glance
- Study type / format
- Preclinical laboratory study (cell culture and rat model), reported as an abstract.
- Population / context
- H2O2-treated bone marrow mesenchymal stem cells (BMSCs) and an ovariectomy-induced osteoporotic rat model.
- Summary based on
- Study abstract
- Original publication
- September 17, 2026
Oxidative stress, BMSC senescence and the ovariectomy rat model
The abstract frames the problem as oxidative stress reducing the usefulness of bone marrow mesenchymal stem cell (BMSC) transplantation by causing cellular senescence and weaker bone-forming (osteogenic) potential. To study this, BMSCs were exposed to H2O2 to mimic oxidative stress, and an osteoporotic rat model was created by ovariectomy. The authors report that SPI1 expression declined both in H2O2-treated BMSCs and in the osteoporotic rat model. Cell viability, reactive oxygen species, NAD+ level, senescence staining and mineralization were among the measurements listed.
Supporting source [1]
SPI1, NAMPT and NAD in H2O2-treated BMSCs
According to the abstract, overexpressing SPI1 rescued H2O2-induced BMSC senescence and the impaired osteogenic differentiation. Mechanistically, SPI1 is said to protect against this oxidative stress-induced senescence by transcriptionally activating NAMPT expression and raising NAD level. Protein-DNA interaction between SPI1 and the NAMPT promoter was examined with ChIP and luciferase reporter assays. These are cell-culture findings; the abstract does not report whether raising SPI1 or NAD improved outcomes in the living rats.
Supporting source [1]
USP22 stabilizes SPI1; SPI1 knockdown reverses effects
The abstract states that USP22 stabilized SPI1 protein through deubiquitination, supported by co-immunoprecipitation and ubiquitination assays. USP22 overexpression alleviated oxidative stress-induced BMSC senescence and osteogenic differentiation impairment, and these effects were reversed by SPI1 knockdown. The conclusion links USP22 to NAMPT transcription via deubiquitinating and stabilizing SPI1. This is an abstract only; the full text was not reviewed, so details such as sample sizes, effect sizes and statistics are not available here. The findings are preclinical and do not establish human lifespan or transplantation benefits.
Supporting source [1]
How to interpret this
Abstract only; the full text was not reviewed. Sample sizes, effect sizes, statistics and whether the rat model showed treatment benefits are not reported in the supplied text. Findings are preclinical cell-culture and animal results, not evidence of human lifespan or transplantation benefit.
Based on the study abstract; the full paper, tables and supplementary data were not reviewed.
Source & supporting passages
Wu M, Yang YF, Du XP. · europepmc.org · September 17, 2026