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MicroRNA-29b Modulates β-Secretase Activity in SH-SY5Y Cell Line and Diabetic Mouse Brain

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Abstract

Hyperglycemia is one of the major risk factors responsible for memory impairment in diabetes which may lead to Alzheimer’s disease (AD) at a later stage. MicroRNAs are a class of non-coding RNAs that are found to play a role in diabetes. Downregulation of microRNA-29b in diabetes is well reported. Moreover, microRNA-29b is also reported to target the 3′ UTR of β-secretase (BACE-1) enzyme which is involved in the formation of amyloid-beta (Aβ) in AD via cleavage of amyloid precursor protein (APP). Therefore, the present study was designed to elucidate whether microRNA-29b could be a link between diabetes and dementia. In the in vitro and in vivo diabetic model, we found downregulation of microRNA-29b due to hyperglycemia. After human microRNA-29b treatment, there was a significant improvement in the short-term and spatial memory in diabetic mice. Also, the human microRNA-29b treatment decreased oxidative stress and BACE-1 activity in diabetes. The present findings revealed that the downregulation of microRNA-29b in diabetes could be associated with memory impairment and increased BACE-1 activity. These results would give a future direction to study the role played by microRNAs in diabetes-associated memory impairment and hence aid in the development of therapeutics to treat the same.

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Acknowledgement

The research was carried out at National Institute of Pharmaceutical Education and Research-Ahmedabad with the financial aid from Department of Pharmaceuticals, Ministry of Chemicals and Fertilizers, Government of India.

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Kavya Jash: Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Software and Writing—Original draft. Piyush Gondaliya: Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Software and Writing—Original draft. Aditya Sunkaria: Conceptualization, Supervision, Writing—Review & Editing. Kiran Kalia: Project administration, Resources, Supervision.

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Correspondence to Kiran Kalia.

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The authors declare that they have no conflict of interest.

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“All applicable institutional guidelines for the care and use of animals were followed. All procedures performed in studies involving animals were in accordance with the ethical standards of the institution at which the studies were conducted. (NIPER-A institutional animal ethics committee, NIPER-A/IAEC/2017/032)”.

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Jash, K., Gondaliya, P., Sunkaria, A. et al. MicroRNA-29b Modulates β-Secretase Activity in SH-SY5Y Cell Line and Diabetic Mouse Brain. Cell Mol Neurobiol 40, 1367–1381 (2020). https://doi.org/10.1007/s10571-020-00823-4

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  • DOI: https://doi.org/10.1007/s10571-020-00823-4

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