Abstract
Alzheimer’s disease (AD), a multifactorial disease, is characterized by the accumulation of neurofibrillary tangles (NFTs) and amyloid beta (Aβ) plaques. AD is triggered via several factors like alteration in cytoskeletal proteins, a mutation in presenilin 1 (PSEN1), presenilin 2 (PSEN2), amyloid precursor protein (APP), and post-translational modifications (PTMs) in the cytoskeletal elements. Owing to the major structural and functional role of cytoskeletal elements, like the organization of axon initial segmentation, dendritic spines, synaptic regulation, and delivery of cargo at the synapse; modulation of these elements plays an important role in AD pathogenesis; like Tau is a microtubule-associated protein that stabilizes the microtubules, and it also causes inhibition of nucleo-cytoplasmic transportation by disrupting the integrity of nuclear pore complex. One of the major cytoskeletal elements, actin and its dynamics, regulate the dendritic spine structure and functions; impairments have been documented towards learning and memory defects. The second major constituent of these cytoskeletal elements, microtubules, are necessary for the delivery of the cargo, like ion channels and receptors at the synaptic membranes, whereas actin-binding protein, i.e., Cofilin’s activation form rod-like structures, is involved in the formation of paired helical filaments (PHFs) observed in AD. Also, the glial cells rely on their cytoskeleton to maintain synaptic functionality. Thus, making cytoskeletal elements and their regulation in synaptic structure and function as an important aspect to be focused for better management and targeting AD pathology. This review advocates exploring phytochemicals and Ayurvedic plant extracts against AD by elucidating their neuroprotective mechanisms involving cytoskeletal modulation and enhancing synaptic plasticity. However, challenges include their limited bioavailability due to the poor solubility and the limited potential to cross the blood–brain barrier (BBB), emphasizing the need for targeted strategies to improve therapeutic efficacy.
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Acknowledgements
H.V. and S.K., and P.G. acknowledges financial support in the form of a junior research fellowship (JRF) from the University Grants Commission (UGC) and Dept. of Biotechnology (DBT), Govt. of India, New Delhi, India, respectively. Because of the limited focus of the article, many relevant and appropriate references could not be included, for which the authors apologize.
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A.K.M and M.D. thankfully acknowledges financial support in the form of Core Research Grant (CRG/2021/002524) from SERB, DST, Govt. of India, New Delhi, India.
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AKM and MD conceived the idea and outline of the manuscript. HV and SK (both of them contributed equally) performed literature review, wrote the manuscript, and made the figures and tables along with PG and SK. All authors have read the manuscript and agreed to the final draft of the manuscript.
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Verma, H., Kaur, S., Kaur, S. et al. Role of Cytoskeletal Elements in Regulation of Synaptic Functions: Implications Toward Alzheimer’s Disease and Phytochemicals-Based Interventions. Mol Neurobiol (2024). https://doi.org/10.1007/s12035-024-04053-3
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DOI: https://doi.org/10.1007/s12035-024-04053-3