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Başlık: Inhibition of mast cell tryptase attenuates neuroinflammation via PAR-2/p38/NFκB pathway following asphyxial cardiac arrest in rats
Yazarlar: Ocak, Umut
Huang, Lei
Xu, Weilin
Zuo, Yuchun
Li, Peng
Gamdzyk, Marcin
Zuo, Gang
Mo, Jun
Zhang, Guangyu
Zhang, John H
Uludağ Üniversitesi/Tıp Fakültesi/Cerrahi Tıp Bilimleri Bölümü/Beyin ve Sinir Cerrahisi Anabilim Dalı.
Ocak, Pınar Eser
AAI-2073-2021
57200969645
Anahtar kelimeler: Asphyxia
Global brain ischemia
Cardiac arrest
Cognitive
Mast cell
Neuroinflammation
PAR-2
Tryptase
Immunology
Neurosciences & neurology
Protease-activated receptors
Global cerebral-ischemia
Intracerebral hemorrhage
Microglia activation
Collagen-synthesis
Brain
Survival
Pathophysiology
Resuscitation
Infiltration
Yayın Tarihi: 4-May-2020
Yayıncı: BMC
Atıf: Ocak, U. vd. (2020). "Inhibition of mast cell tryptase attenuates neuroinflammation via PAR-2/p38/NFκB pathway following asphyxial cardiac arrest in rats". Journal of Neuroinflammation, 17(1).
Özet: Background: Cardiac arrest survivors suffer from neurological dysfunction including cognitive impairment. Cerebral mast cells, the key regulators of neuroinflammation contribute to neuroinflammation-associated cognitive dysfunction. Mast cell tryptase was demonstrated to have a proinflammatory effect on microglia via the activation of microglial protease-activated receptor-2 (PAR-2). This study investigated the potential anti-neuroinflammatory effect of mast cell tryptase inhibition and the underlying mechanism of PAR-2/p-p38/NFκB signaling following asphyxia-induced cardiac arrest in rats. Methods: Adult male Sprague-Dawley rats resuscitated from 10 min of asphyxia-induced cardiac arrest were randomized to four separate experiments including time-course, short-term outcomes, long-term outcomes and mechanism studies. The effect of mast cell tryptase inhibition on asphyxial cardiac arrest outcomes was examined after intranasal administration of selective mast cell tryptase inhibitor (APC366; 50 μg/rat or 150 μg/rat). AC55541 (selective PAR-2 activator; 30 μg/rat) and SB203580 (selective p38 inhibitor; 300 μg/rat) were used for intervention. Short-term neurocognitive functions were evaluated using the neurological deficit score, number of seizures, adhesive tape removal test, and T-maze test, while long-term cognitive functions were evaluated using the Morris water maze test. Hippocampal neuronal degeneration was evaluated by Fluoro-Jade C staining. Results: Mast cell tryptase and PAR-2 were dramatically increased in the brain following asphyxia-induced cardiac arrest. The inhibition of mast cell tryptase by APC366 improved both short- and long-term neurological outcomes in resuscitated rats. Such behavioral benefits were associated with reduced expressions of PAR-2, p-p38, NFκB, TNF-α, and IL-6 in the brain as well as less hippocampal neuronal degeneration. The anti-neuroinflammatory effect of APC366 was abolished by AC55541, which when used alone, indeed further exacerbated neuroinflammation, hippocampal neuronal degeneration, and neurologic deficits following cardiac arrest. The deleterious effects aggregated by AC55541 were minimized by p38 inhibitor. Conclusions: The inhibition of mast cell tryptase attenuated neuroinflammation, led to less hippocampal neuronal death and improved neurological deficits following cardiac arrest. This effect was at least partly mediated via inhibiting the PAR-2/p-p38/NFκB signaling pathway. Thus, mast cell tryptase might be a novel therapeutic target in the management of neurological impairment following cardiac arrest.
URI: https://doi.org/10.1186/s12974-020-01808-2
https://jneuroinflammation.biomedcentral.com/articles/10.1186/s12974-020-01808-2
http://hdl.handle.net/11452/34270
ISSN: 17422094
Koleksiyonlarda Görünür:Scopus
Web of Science

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