Abstract
The precursor nerve growth factor (ProNGF) and its receptor p75 neurotrophin receptor (p75NTR) are upregulated in several brain diseases, including ischemic stroke. The activation of p75NTR is associated with neuronal apoptosis and inflammation. Thus, we hypothesized that p75NTR modulation attenuates brain damage and improves functional outcomes after ischemic stroke. Two sets of experiments were performed. (1) Adult wild-type (WT) C57BL/6 J mice were subjected to intraluminal suture-middle cerebral artery occlusion (MCAO) to induce cerebral ischemia. Pharmacological inhibitor of p75NTR, LM11A-31 (50 mg/kg), or normal saline was administered intraperitoneally (IP) 1 h post-MCAO, and animals survived for 24 h. (2) Adult p75NTR heterozygous knockout (p75NTR+/−) and WT were subjected to photothrombotic (pMCAO) to induce ischemic stroke, and the animals survived for 72 h. The sensory-motor function of animals was measured using Catwalk XT. The brain samples were collected to assess infarction volume, edema, hemorrhagic transformation, neuroinflammation, and signaling pathway at 24 and 72 h after the stroke. The findings described that pharmacological inhibition and genetic knocking down of p75NTR reduce infarction size, edema, and hemorrhagic transformation following ischemic stroke. Additionally, p75NTR modulation significantly decreased several anti-apoptosis markers and improved sensory motor function compared to the WT mice following ischemic stroke. Our observations exhibit that the involvement of p75NTR in ischemic stroke and modulation of p75NTR could improve the outcome of ischemic stroke by increasing cell survival and enhancing motor performance. LM11A-31 has the potential to be a promising therapeutic agent for ischemic stroke. However, more evidence is needed to illuminate the efficacy of LM11A-31 in ischemic stroke.
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Data Availability
The data generated and analyzed in this study are available from the corresponding author on reasonable request.
Code Availability
Not applicable
Abbreviations
- AD:
-
Alzheimer’s disease
- Akt:
-
Protein kinase B
- Bax:
-
Bcl-2 associated X protein
- BBB:
-
Blood-brain barrier
- Bcl-2:
-
B-cell lymphoma 2
- BDNF:
-
Brain-derived neurotrophic factor
- CNSL:
-
Central nervous system
- dMCAO:
-
Distal-middle cerebral artery occlusion
- CBF:
-
Cerebral blood flow
- ERK½:
-
Extracellular signal-regulated kinase
- GSK3β:
-
Glycogen synthase kinase 3 beta
- HT:
-
Hemorrhagic transformation
- IP:
-
Intraperitoneally
- JNK:
-
C-Jun N-terminal kinase
- MCAO:
-
Middle cerebral artery occlusion
- NFκB:
-
Nuclear factor kappa- light- chain- enhancer of activated B cells
- NGF:
-
Nerve growth factor
- NT-3:
-
Neurotrophin-3
- NT-4:
-
Neurotrophin-4
- P75NTR+/− :
-
P75NTR heterozygous knock out
- ProNGF:
-
Precursor nerve growth factor
- pMCAO:
-
Photothrombotic middle cerebral artery occlusion
- RhoA:
-
Ras homolog gene family member A
- TBI:
-
Traumatic brain injury
- TNF-α:
-
Tumor necrosis factor-alpha
- Trk:
-
Tyrosine receptor kinase
- tPA:
-
Tissue plasminogen activator
- WT:
-
Wild type
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This work was supported by the UTHSC Bridge funding award (E073005058–Bridge Support-2022) and the National Institute of Health (R01-NS097800 and R56 NS127924-01) to TI.
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Golnoush Mirzahosseini—conducted experiments, result analysis, writing of the first draft . Saifudeen Ismael conducted experiments and helped data analysis and Mohd. Salman—reviewed the manuscript and data analysis. Santosh Kumar—critically reviewed the manuscript. Tauheed Ishrat—designed and oversaw the whole project including experimental design, managing resources and critically reviewed the manuscript.
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Mirzahosseini, G., Ismael, S., Salman, M. et al. Genetic and Pharmacological Modulation of P75 Neurotrophin Receptor Attenuate Brain Damage After Ischemic Stroke in Mice. Mol Neurobiol 61, 276–293 (2024). https://doi.org/10.1007/s12035-023-03550-1
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DOI: https://doi.org/10.1007/s12035-023-03550-1