Modulation of brain insulin signaling in Alzheimer's disease: New insight on the protective role of green coffee bean extract.

Abstract:

:Objective: Alzheimer's disease (AD), a neurodegenerative disorder, involves brain insulin signaling cascades and insulin resistance (IR). Because of limited treatment options, new treatment strategies are mandatory. Green coffee bean extract (GCBE) was reported to attenuate IR and improve brain energy metabolism. We aimed to investigate the possible use of GCBE as a prophylactic strategy to delay the onset of AD or combined with pioglitazone (PIO) as a strategy to retard the progression of AD.Methods: Rats received 10% fructose in drinking water for 18 weeks to induce AD. GCBE-prophylactic group received GCBE for 22 weeks started 4 weeks prior to fructose administration. The PIO group treated with PIO for 6 weeks started on week 12 of fructose administration. The GCBE+PIO group received GCBE for 22 weeks started 4 weeks prior to fructose administration and treated with PIO for the last 6 weeks of fructose administration.Results: Pretreatment with GCBE, either alone or combined with PIO, alleviated IR-induced AD changes. GCBE improved cognition, decreased serine phosphorylation of insulin receptor substrate, increased phosphoinositol-3 kinase (PI3K) activity and protein kinase B (Akt) gene expression, decreased glycogen synthase kinase-3β (GS3Kβ) gene expression and Tau hyperphosphorylation.Discussion: GCBE exerted neuroprotective effects against IR-induced AD mediated by alleviating IR and modulating brain insulin signaling cascade.

journal_name

Nutr Neurosci

journal_title

Nutritional neuroscience

authors

Mohamed HE,Asker ME,Younis NN,Shaheen MA,Eissa RG

doi

10.1080/1028415X.2018.1468535

subject

Has Abstract

pub_date

2020-01-01 00:00:00

pages

27-36

issue

1

eissn

1028-415X

issn

1476-8305

journal_volume

23

pub_type

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