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In Silico Analysis to Link Insulin Resistance, Obesity and Ageing with Alzheimer’s Disease

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Abstract

The process of ageing accompanies several metabolic diseases. With ageing, fats accumulate to increase the visceral and abdominal adiposity leading to hyperinsulinemia, insulin resistance, obesity and several other diseases. Drosophila melanogaster is often used to study the ageing process and its related disorders. Therefore, in this study, we performed an in silico analysis to relate the process of ageing and insulin resistance. We analysed the data of insulin-resistant Drosophila from the GEO database and compared it with the data from the literature survey. We observed that 98 genes were common in both the models, and they showed gene modulations related to metabolic pathways, fatty acid metabolism, insulin resistance and neural receptor–ligand binding pathways. Analysis of the REACTOME database against human data revealed that the TRKB signalling pathway is commonly affected. The TRKB-mediated BDNF pathway is a major regulator of memory loss. We further analysed the common genes in Alzheimer’s disease and compared the fly data with human data to identify the diseases related to these common genes. Then, we performed a literature survey to provide protective mechanisms for the TRKB signalling pathway activation, mediated through polyphenols. We treated the flies with sesamol-conjugated lipoic acid derivative (a phenolic compound) at hormetic doses to evaluate its effect on the memory of flies.

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Data Availability

Data available on request.

Abbreviations

Nrf2:

Nuclear factor erythroid 2–related factor 2

NFκB:

Nuclear factor kappa-light-chain-enhancer of activated B cells

BDNF:

Brain-derived neurotropic factor

GEO:

Gene Expression Omnibus

AD:

Alzheimer’s disease

TRKB:

Tropomyosin-related kinase B

SYD:

Sugar yeast diet

HFD:

High fat diet

NTF:

Neurotropic factor

GABA:

Gamma aminobutyric acid

PI3K:

Phosphatidylinositol 3-kinases

AKT:

Protein kinase B

ERK:

Extracellular signal-regulated kinase

CREB:

CAMP-response element binding protein

PKC:

Protein kinase C

MAPK:

Mitogen-activated protein kinase

Bcl-xL:

B-cell lymphoma-extra large

Bcl-2:

B-cell lymphoma 2

NT4:

Neurotrophin 4

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Acknowledgements

The authors thank the VIT University for providing the facility.

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Authors

Contributions

P.S, P.J, R.D, and K.T conceived, designed, and directed the study. P.J. and R.D. conducted the synthesis. P.S, K.P, S.Y, S.D, and Y.S conducted the experiments with Drosophila. P.S and K.T were involved in writing and discussion of the manuscript.

Corresponding author

Correspondence to Kavitha Thirumurugan.

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The authors declare no competing interests.

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Sarkar, P., Jayaraj, P., Patwardhan, K. et al. In Silico Analysis to Link Insulin Resistance, Obesity and Ageing with Alzheimer’s Disease. J Mol Neurosci 71, 2608–2617 (2021). https://doi.org/10.1007/s12031-021-01875-x

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  • DOI: https://doi.org/10.1007/s12031-021-01875-x

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