Investigation of vascular endothelial growth factor receptor-dependent neuroplasticity on rat nucleus tractus solitarius and phrenic nerve after chronic sustained hypoxia.
NTS
VEGFR-2
chronic sustained hypoxia
phrenic nerve
Journal
Journal of biochemical and molecular toxicology
ISSN: 1099-0461
Titre abrégé: J Biochem Mol Toxicol
Pays: United States
ID NLM: 9717231
Informations de publication
Date de publication:
Dec 2021
Dec 2021
Historique:
revised:
17
08
2021
received:
24
06
2021
accepted:
11
09
2021
pubmed:
21
9
2021
medline:
15
2
2022
entrez:
20
9
2021
Statut:
ppublish
Résumé
The neuronal system that controls respiration creates plasticity in response to physiological changes. Chronic sustained hypoxia causes neuroplasticity that contributes to ventilatory acclimatization to hypoxia (VAH). The purpose of this study is to explain the potential roles of the VAH mechanism developing because of chronic sustained hypoxia on respiratory neuroplasticity of vascular endothelial growth factor (VEGF) receptor activation on the nucleus tractus solitarius (NTS) and phrenic nerve. In this study 24 adult male Sprague-Dawley rats were used. Subjects were separated into four groups, a moderate-sham (mSHAM), severed-sham (sSHAM), moderate chronic sustained hypoxia (mCSH), and severed chronic sustained hypoxia (sCSH). Normoxic group (mSHAM and sSHAM) rats were exposed to 21% O₂ level (7 days) in the normobaric room while hypoxia group (mCSH and sCSH) rats were exposed to 13% and 10% O₂ level (7 days). Different protocols were applied for normoxic and hypoxia groups and ventilation, respiratory frequency, and tidal volume measurements were made with whole-body plethysmography. After the test HIF-1α, erythropoietin (EPO), and VEGFR-2 expressions on the NTS region in the medulla oblongata and phrenic nerve motor neurons in spinal cord tissue were analyzed using the immunohistochemical stain method. Examinations on the medulla oblongata and spinal cord tissues revealed that HIF-1α, EPO, and VEGFR-2 expressions increased in hypoxia groups compared to normoxic groups while a similar increase was also seen when respiratory parameters were assessed. Consequently, learning about VAH-related neuroplasticity mechanisms developed as a result of chronic continuous hypoxia will contribute to developing new therapeutical approaches to various diseases causing respiratory failure using brain plasticity without recourse to medicines.
Substances chimiques
Receptors, Vascular Endothelial Growth Factor
EC 2.7.10.1
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
e22918Informations de copyright
© 2021 Wiley Periodicals LLC.
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