Abstract
Alzheimer’s disease (AD) is the foremost type of dementia that afflicts considerable morbidity and mortality in aged population. Several transcription molecules, pathways, and molecular mechanisms such as oxidative stress, inflammation, autophagy, and immune system interact in a multifaceted way that disrupt physiological processes (cell growth, differentiation, survival, lipid and energy metabolism, endocytosis) leading to apoptosis, tauopathy, β-amyloidopathy, neuron, and synapse loss, which play an important role in AD pathophysiology. Despite of stupendous advancements in pathogenic mechanisms, treatment of AD is still a nightmare in the field of medicine. There is compelling urgency to find not only symptomatic but effective disease-modifying therapies. Recently, phosphoinositide 3-kinase (PI3K) and Akt are identified as a pathway triggered by diverse stimuli, including insulin, growth factors, cytokines, and cellular stress, that link amyloid-β, neurofibrillary tangles, and brain atrophy. The present review aims to explore and analyze the role of PI3K-Akt pathway in AD and agents which may modulate Akt and have therapeutic prospects in AD. The literature was researched using keywords “PI3K-Akt” and “Alzheimer’s disease” from PubMed, Web of Science, Bentham, Science Direct, Springer Nature, Scopus, and Google Scholar databases including books. Articles published from 1992 to 2021 were prioritized and analyzed for their strengths and limitations, and most appropriate ones were selected for the purpose of review. PI3K-Akt pathway regulates various biological processes such as cell proliferation, motility, growth, survival, and metabolic functions, and inhibits many neurotoxic mechanisms. Furthermore, experimental data indicate that PI3K-Akt signaling might be an important therapeutic target in treatment of AD.
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Abbreviations
- ACh:
-
Acetylcholine
- AChE:
-
Acetylcholinesterase
- AD:
-
Alzheimer’s disease
- AGE:
-
Advanced glycation end-products
- APOE:
-
Apolipoprotein E
- APP:
-
Amyloid precursor protein
- Aβ :
-
Amyloid-beta
- BACE-1:
-
Beta-site amyloid precursor protein cleaving enzyme 1 (β-secretase)
- Bad:
-
Bcl-2-associated death promoter (BAD) protein
- Bax:
-
Bcl-2-associated X protein
- BCAP:
-
B-cell adaptor protein for phosphoinositide 3-kinase
- Bcl-2:
-
B-cell lymphoma 2
- BCR (BR):
-
B cell receptor
- Bcl-XL :
-
B cell lymphoma-extra large
- BDNF:
-
Brain-derived neurotrophic factor
- Bim:
-
Bcl-2-Like Protein 11
- CA:
-
Cornu Ammonis
- CD:
-
Complement derived
- ChAT:
-
Choline-acetyl transferase
- CREB:
-
CAMP response element binding protein
- CRMP:
-
Collapsin response mediator protein
- DNA:
-
Deoxyribonucleic acid
- 4EBP1:
-
Eukaryotic translation initiation factor 4E (eIF4E)-binding protein 1
- EGF:
-
Epidermal growth factor
- eNOS:
-
Endothelial nitric oxide synthase
- ERK:
-
Extracellular signal-regulated kinase
- FoxO1:
-
Forkhead box protein O1
- FYVE:
-
Fab 1, YOTB, Vac 1, EEA1
- GAB-1:
-
GRB2-associated-binding protein 1
- GABA:
-
Gamma amino butyric acid
- GLUT:
-
Glucose transporter
- GPCR:
-
G-protein coupled receptor
- GSK-3:
-
Glycogen synthase kinse-3
- HECT:
-
E3 ligases of the homologous to the E6AP carboxyl terminus
- HIF:
-
Hypoxia inducible factor
- IL:
-
Interleukin
- iNOS:
-
Inducible nitric oxide synthase
- IR:
-
Insulin receptor
- IRS:
-
Insulin receptor substrate
- JAK:
-
Janus kinases
- JNK:
-
C-Jun (ju-nana) N-terminal kinases
- LTβR:
-
Lymphotoxin-β receptor
- LTD:
-
Long-term depression
- LTP:
-
Long-term potentiation
- mAChR:
-
Muscarinic acetylcholine receptors
- MAPK:
-
Mitogen-activated protein kinase
- MCI:
-
Mild cognitive impairment
- Mcl-1:
-
Myeloid cell leukemia 1
- MDA:
-
Malondialdehyde
- mTOR:
-
Mammalian target of rapamycin
- nAChR:
-
Nicotinic acetylcholine receptors
- NEMO:
-
NFκB essential modulator
- NFTs:
-
Neurofibrillary tangles
- NFκB:
-
Nuclear factor kappa-light-chain-enhancer of activated B cells
- NGF:
-
Nerve growth factor
- NMDA:
-
N-Methyl-D-aspartate
- nNOS:
-
Neuronal nitric oxide synthase
- NO:
-
Nitric oxide
- NOX family:
-
NADPH oxidase [NOX2/gp91(phox)] family
- Nrf2:
-
Nuclear factor (erythroid-derived 2)-like 2
- p-Akt:
-
Phosphorylated Akt
- PAMPs:
-
Pathogen-associated microbial patterns
- PARP:
-
Poly ADP ribose polymerase
- PDGF:
-
Platelet-derived growth factor
- PDK1:
-
3-Phosphoinositide-dependent protein kinase-1
- p-GSK-3:
-
Phosphorylated GSK-3
- PH-Domain:
-
Pleckstrin homology domain
- PHFs:
-
Paired helical filaments
- PI3K:
-
Phosphoinositide 3-kinase
- PIs:
-
Phosphoinositide
- PP2A:
-
Protein phosphatase 2A
- PS:
-
Presenilin
- PTEN:
-
Phosphatase and tensin homolog
- RAGE:
-
Receptors for advanced glycation end-products
- Rheb:
-
Ras homolog enriched in brain
- Rho-kinase:
-
Rho-associated coiled-coil-containing protein kinase
- ROS:
-
Reactive oxygen species
- RTK:
-
Receptor tyrosine kinase
- S6K1:
-
S6 kinase 1
- Ser:
-
Serine (S)
- SHIP:
-
Src-homology 2 containing inositol (poly)phosphate-5-phosphatases
- Thr:
-
Threonine (T)
- t1/2 :
-
Half-life
- TLR:
-
Toll-like receptor
- TNFR:
-
Tumor necrosis factor receptor
- TNF-α :
-
Tumor necrosis factor-α
- TRAF6:
-
Tumor necrosis factor receptor (TNFR)-associated factor 6
- TSC:
-
Tuberous sclerosis complex
- Vps 34:
-
Vacuolar protein-sorting defective 34
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The authors are thankful to I.K.G. Punjab Technical University, Jalandhar (Punjab) and Amar Shaheed Baba Ajit Singh Jujhar Singh Memorial College of Pharmacy, Bela, Ropar (Punjab).
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Kumar, M., Bansal, N. Implications of Phosphoinositide 3-Kinase-Akt (PI3K-Akt) Pathway in the Pathogenesis of Alzheimer’s Disease. Mol Neurobiol 59, 354–385 (2022). https://doi.org/10.1007/s12035-021-02611-7
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DOI: https://doi.org/10.1007/s12035-021-02611-7