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NGF/TrkA promotes the vitality, migration and adhesion of bone marrow stromal cells in hypoxia by regulating the Nrf2 pathway

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Metabolic Brain Disease Aims and scope Submit manuscript

Abstract

Background

Bone marrow stromal cells (BMSCs) transplantation is a treatment strategy for ischemic stroke (IS) with great potential. However, the vitality, migration and adhesion of BMSCs are greatly impaired due to the harsh environment of the ischemic area, which affects the therapeutic effects. Herein, we aimed to investigate the roles of nerve growth factor (NGF) in regulating cell behaviors of BMSCs in IS.

Methods

The mRNA and protein expressions were assessed using qRT-PCR and western blot, respectively. To simulate ischemic-like conditions in vitro, Brain microvascular (bEnd.3) cells were exposed to oxygen and glucose deprivation (OGD). Cell viability and cell proliferation were evaluated by MTT assay and BrdU assay, respectively. Transwell migration and cell adhesion assays were carried out to determine cell migration and adhesion of BMSCs, respectively, coupled with flow cytometry to evaluate cell apoptosis of bEnd.3 cells. Finally, angiogenesis assay was performed to assess the angiogenesis ability of bEnd.3 cells.

Results

NGF overexpression resulted in increased cell vitality, adhesion and migration of BMSCs, while NGF knockdown presented the opposite effects. We subsequently discovered that TrkA was a receptor for NGF, and TrkA knockdown significantly inhibited the cell viability, migration and adhesion of BMSCs. Besides, Nrf2 was confirmed as the downstream target of NGF/TrkA to promote the viability, adhesion and migration of BMSC cells. Finally, NGF-silenced BMSCs could not effectively restore the OGD-induced brain microvascular cell damage.

Conclusions

NGF/TrkA promoted the viability, migration and adhesion of BMSCs in IS via activating Nrf2 pathway.

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Availability of data and material

All data generated or analyzed during this study are included in this article. The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.

Code Availability

Not Applicable.

Abbreviations

IS:

Ischemic stroke

BMSCs:

Bone marrow stromal cells

NGF:

Nerve growth factor

AD:

Alzheimer’s disease

TrkA:

Tyrosine kinase receptor type 1

Nrf2:

Nuclear factor erythroid 2-related factor 2

MSCs:

Marrow stromal cells

MTT:

3-(4, 5-Dimethylthiazolyl2)-2, 5-diphenyltetrazolium bromide

BrdU:

5-bromo-2’-deoxyuridine

qRT-PCR:

Quantitative real-time polymerase chain reaction

SD:

Standard deviation

ANOVA:

Analysis of variance

References

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Acknowledgements

We would like to give our sincere gratitude to the reviewers for their constructive comments.

Funding

None.

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Authors and Affiliations

Authors

Contributions

CNF: Conceptualization; Writing-original draft; Methodology; Formal analysis; HQT: Supervision; Validation; ABS: Data curation; Resources; NJ: Investigation; QRL: Software; Visualization; TS: Funding acquisition; Project administration; Writing-review & editing. All authors have read and approved the final version of this manuscript to be published.

Corresponding author

Correspondence to Tao Song.

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The authors declare that there is no conflict of interest.

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Not Applicable. This article does not contain any studies with human participants or animals performed by any of the authors.

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Not Applicable. This article does not contain any studies with human participants or animals performed by any of the authors.

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Not Applicable. This article does not contain any studies with human participants performed by any of the authors.

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Fang, CN., Tan, HQ., Song, AB. et al. NGF/TrkA promotes the vitality, migration and adhesion of bone marrow stromal cells in hypoxia by regulating the Nrf2 pathway. Metab Brain Dis 37, 2017–2026 (2022). https://doi.org/10.1007/s11011-022-00974-x

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  • DOI: https://doi.org/10.1007/s11011-022-00974-x

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