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Evaluation of the Expression of Amyloid Precursor Protein and the Ratio of Secreted Amyloid Beta 42 to Amyloid Beta 40 in SH-SY5Y Cells Stably Transfected with Wild-Type, Single-Mutant and Double-Mutant Forms of the APP Gene for the Study of Alzheimer’s Disease Pathology

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Abstract

Neuroblastoma cell lines such as SH-SY5Y are the most frequently utilized models in neurodegenerative research, and their use has advanced the understanding of the pathology of neurodegeneration over the past few decades. In Alzheimer’s disease (AD), several pathogenic mutations have been described, all of which cause elevated levels of pathological hallmarks such as amyloid-beta (Aβ). Although the genetics of Alzheimer’s disease is well known, familial AD only accounts for a small number of cases in the population, with the rest being sporadic AD, which contains no known mutations. Currently, most of the in vitro models used to study AD pathogenesis only examine the level of Aβ42 as a confirmation of successful model generation and only perform comparisons between wild-type APP and single mutants of the APP gene. Recent findings have shown that the Aβ42/40 ratio in cerebrospinal fluid (CSF) is a better diagnostic indicator for AD patients than is Aβ42 alone and that more extensive Aβ formation, such as accumulation of intraneuronal Aβ, Aβ plaques, soluble oligomeric Aβ (oAβ), and insoluble fibrillar Aβ (fAβ) occurs in TgCRND8 mice expressing a double-mutant form (Swedish and Indiana) of APP, later leading to greater progressive impairment of the brain. In this study, we generated SH-SY5Y cells stably transfected separately with wild-type APP, the Swedish mutation of APP, and the Swedish and Indiana mutations of APP and evaluated the APP expression as well as the Aβ42/40 ratio in those cells. The double-mutant form of APP (Swedish/Indiana) expressed markedly high levels of APP protein and showed a high Aβ2/40 ratio compared to wild-type and single-mutant cells.

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Acknowledgements

This study was financially supported by Universiti Kebangsaan Malaysia Grants DIP/2013/003 and FF-2015-025 and Ministry of Higher Education Grant LRGS/BU/2012/UKM-UKM/K/04.

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Authors and Affiliations

  1. Department of Biochemistry, Faculty of Medicine, Level 17, Preclinical Building, Universiti Kebangsaan Malaysia Medical Center, Jalan Yaacob Latif, Bandar Tun Razak, Cheras, 56000, Kuala Lumpur, Malaysia

    Aslina Pahrudin Arrozi, Siti Nur Syazwani Shukri, Wan Zurinah Wan Ngah, Yasmin Anum Mohd Yusof, Mohd Hanafi Ahmad Damanhuri & Suzana Makpol

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  1. Aslina Pahrudin Arrozi
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  2. Siti Nur Syazwani Shukri
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  3. Wan Zurinah Wan Ngah
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  4. Yasmin Anum Mohd Yusof
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  5. Mohd Hanafi Ahmad Damanhuri
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  6. Suzana Makpol
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Correspondence to Suzana Makpol.

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Pahrudin Arrozi, A., Shukri, S.N.S., Wan Ngah, W.Z. et al. Evaluation of the Expression of Amyloid Precursor Protein and the Ratio of Secreted Amyloid Beta 42 to Amyloid Beta 40 in SH-SY5Y Cells Stably Transfected with Wild-Type, Single-Mutant and Double-Mutant Forms of the APP Gene for the Study of Alzheimer’s Disease Pathology. Appl Biochem Biotechnol 183, 853–866 (2017). https://doi.org/10.1007/s12010-017-2468-6

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