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Abstract Title:

Thymoquinone Preventsβ-Amyloid Neurotoxicity in Primary Cultured Cerebellar Granule Neurons.

Abstract Source:

Cell Mol Neurobiol. 2013 Nov;33(8):1159-69. doi: 10.1007/s10571-013-9982-z. Epub 2013 Oct 8.

Abstract Author(s):

Norsharina Ismail, Maznah Ismail, Musalmah Mazlan, Latiffah Abdul Latiff, Mustapha Umar Imam, Shahid Iqbal, Nur Hanisah Azmi, Siti Aisyah Abd Ghafar, Kim Wei Chan

Article Affiliation:

Nutricosmeceuticals and Nutrigenomics Programme, Laboratory of Molecular Biomedicine, Institute of Bioscience, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia.

Abstract:

Thymoquinone (TQ), a bioactive constituent of Nigella sativa Linn (N. sativa) has demonstrated several neuropharmacological attributes. In the present study, the neuroprotective properties of TQ were investigated by studying its anti-apoptotic potential to diminishβ-amyloid peptide 1-40 sequence (Aβ1-40)-induced neuronal cell death in primary cultured cerebellar granule neurons (CGNs). The effects of TQ against Aβ1-40-induced neurotoxicity, morphological damages, DNA condensation, the generation of reactive oxygen species, and caspase-3, -8, and -9 activation were investigated. Pretreatment of CGNs with TQ (0.1 and 1 μM) and subsequent exposure to 10 μM Aβ1-40 protected the CGNs against the neurotoxic effects of the latter. In addition, the CGNs were better preserved with intact cell bodies, extensive neurite networks, a loss of condensed chromatin and less free radical generation than those exposed to Aβ1-40 alone. TQ pretreatment inhibited Aβ1-40-induced apoptosis of CGNs via both extrinsic and intrinsic caspase pathways. Thus, the findings of this study suggest that TQ may prevent neurotoxicity and Aβ1-40-induced apoptosis. TQ is, therefore, worth studying further for its potential to reduce the risks of developing Alzheimer's disease.

Study Type : In Vitro Study

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Sayer Ji
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