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  1. Home
  2. Browse by Author

Browsing by Author "Musalmah Mazlan"

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    Publication
    Metabolomics Profiling of Age-associated Metabolites in Malay Population
    (Hindawi, 2023)
    Jen Kit Tan
    ;
    Siti Nor Asyikin Zakaria
    ;
    Geetha Gunasekaran
    ;
    Nur Fathiah Abdul Sani
    ;
    Muhammad Luqman Nasaruddin
    ;
    Faizul Jaafar
    ;
    Zulzikry Hafiz Abu Bakar
    ;
    Ahmad Imran Zaydi Amir Hamzah
    ;
    Khairun Nain Nor Aripin
    ;
    Mohd Dzulkhairi Mohd Rani
    ;
    Nor Azila Noh 
    ;
    Hanafi Ahmad Damanhuri
    ;
    Musalmah Mazlan
    ;
    Suzana Makpol
    ;
    Wan Zurinah Wan Ngah
    Aging is a complex process characterized by progressive loss of functional abilities due to the accumulation of molecular damages. Metabolomics could offer novel insights into the predictors and mechanisms of aging. This cross-sectional study is aimed at identifying age-associated plasma metabolome in a Malay population. A total of 146 (90 females) healthy participants aged 28–69 were selected for the study. Untargeted metabolomics profiling was performed using liquid chromatography-tandem mass spectrometry. Association analysis was based on the general linear model. Gender-associated metabolites were adjusted for age, while age-associated metabolites were adjusted for gender or analyzed in a gender-stratified manner. Gender-associated metabolites such as 4-hydroxyphenyllactic acid, carnitine, cortisol, and testosterone sulfate showed higher levels in males than females. Deoxycholic acid and hippuric acid were among the metabolites with a positive association with age after being adjusted for gender, while 9(E),11(E)-conjugated linoleic acid, cortisol, and nicotinamide were negatively associated with age. In gender-stratified analysis, glutamine was one of the common metabolites that showed a direct association with age in both genders, while metabolites such as 11-deoxy prostaglandin F2β, guanosine monophosphate, and testosterone sulfate were inversely associated with age in males and females. This study reveals several age-associated metabolites in Malays that could reflect the changes in metabolisms during aging and may be used to discern the risk of geriatric syndromes and disorders later. Further studies are required to determine the interplay between these metabolites and environmental factors on the functional outcomes during aging.
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    Publication
    Thymoquinone Prevents β-Amyloid Neurotoxicity in Primary Cultured Cerebellar Granule Neurons
    (Springer, 2013)
    Siti Aisyah Abd Ghafar
    ;
    Norsharina Ismail
    ;
    Maznah Ismail
    ;
    Musalmah Mazlan
    ;
    Latiffah Abdul Latiff
    ;
    Mustapha Umar Imam
    ;
    Shahid Iqbal
    ;
    Nur Hanisah Azmi
    ;
    Kim Wei Chan
    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 diminish β-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.
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