Inhibition of the NLRP3-inflammasome as a potential approach for neuroprotection after stroke

Saifudeen Ismael, Liang Zhao, Sanaz Nasoohi, Tauheed Ishrat

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Activation of the NOD-like receptor protein (NLRP3)-inflammasome has been postulated to mediate inflammatory responses to brain damage during ischemic/reperfusion (I/R) injury. We therefore hypothesized that MCC950, a selective NLRP3-inflammasome inhibitor provides protection in mouse model of transient middle cerebral artery occlusion (tMCAO). Focal cerebral ischemia was induced by 60 min tMCAO followed by intraperitoneal administration of MCC950 (50 mg/kg) or saline at 1 h and 3 h post-occlusion. After 24 h of I/R, mice were tested for neurological outcome and were sacrificed for the analysis of infarct size and estimating NLRP3-inflammasome and apoptotic markers as well. Spectrophotometric method was used to determine hemoglobin (Hb) content as a marker of intracerebral hemorrhage. MCC950-treated mice showed a substantial reduction in infarction, edema and Hb content compared to saline controls in parallel with improved neurological deficits. MCC950 reduced expression of NLRP3-inflammasome cleavage products Caspase-1 and interlukin-1β (IL-1β) in penumbral region. These protective effects of MCC950 were associated with decreased TNF-α levels as well as poly (ADP-ribose) polymerase (PARP) and Caspase-3 cleavage and paralleled less phosphrylated NFκBp65 and IκBα levels. Taken together, these data indicate that inhibition of NLRP3-inflammasome with MCC950 has therapeutic potential in ischemic stroke models. Further investigations into the therapeutic efficacy and protocols are needed to confirm whether MCC950 treatment could be a promising candidate for clinical trials.

Original languageEnglish (US)
Article number5971
JournalScientific Reports
Volume8
Issue number1
DOIs
StatePublished - Dec 1 2018

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Inflammasomes
Stroke
Middle Cerebral Artery Infarction
Hemoglobins
Caspase 1
Poly(ADP-ribose) Polymerases
Cerebral Hemorrhage
Reperfusion Injury
Brain Ischemia
Caspase 3
Infarction
Reperfusion
Edema
Neuroprotection
Clinical Trials
Brain
Therapeutics

All Science Journal Classification (ASJC) codes

  • General

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Inhibition of the NLRP3-inflammasome as a potential approach for neuroprotection after stroke. / Ismael, Saifudeen; Zhao, Liang; Nasoohi, Sanaz; Ishrat, Tauheed.

In: Scientific Reports, Vol. 8, No. 1, 5971, 01.12.2018.

Research output: Contribution to journalArticle

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