Polyphenols from Conyza dioscoridis (L.) ameliorate Alzheimer's disease- like alterations through multi-targeting activities in two animal models

Recent investigations suggested that anticancer agents may inhibit the progression of Alzheimer's disease (AD) pathology. Conyza dioscoridis (L.) was demonstrated to have anticancer, antioxidant, anti-inflammatory and antidiabetic effects. This study was carried out to investigate the efficacy...

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Veröffentlicht in:BMC complementary and alternative medicine 2022-11, Vol.22 (1), p.288
Hauptverfasser: Gomaa, Adel A, Farghaly, Hanan S M, Makboul, Rania M, Hussien, Abeer M, Nicola, Mariam A
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container_title BMC complementary and alternative medicine
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Farghaly, Hanan S M
Makboul, Rania M
Hussien, Abeer M
Nicola, Mariam A
description Recent investigations suggested that anticancer agents may inhibit the progression of Alzheimer's disease (AD) pathology. Conyza dioscoridis (L.) was demonstrated to have anticancer, antioxidant, anti-inflammatory and antidiabetic effects. This study was carried out to investigate the efficacy of polyphenols from Conyza dioscoridis (L.) extract (PCDE) on AD. Impacts of 3 doses of PCDE and donepezil, a reference drug, on the features of Alzheimer's disease in two animal models were investigated. PCDE ameliorated the memory and learning impairment shown in rats following a single dose of scopolamine (scopolamine model) or 17 weeks of high-fat/high-fructose(HF/Hfr) diet coupled with a single dose of streptozotocin, (25 mg/kg) (T2D model). They reduced significantly the high hippocampal cholinesterase activity in the two models of rats. Administration of PCDE for 8 weeks in the T2D model showed a significant reduction in hippocampal GSK-3β, caspase-3 activity and increase in the inhibited glutamate receptor expression (AMPA GluR1 subunit and NMDA receptor subunits NR1, NR2A, NR2B). A significant reduction of HOMA-insulin resistance and serum hypercholesterolemia was observed. The Tau hyperphosphorylation and Aβ 1-42 generation in the hippocampal of T2D rats were significantly decreased by PCDE. Modulation of the oxidative stress markers, (rise in GH and SOD; decrease in MDA levels) and a significant reduction of TNF-α and IL-1β in the hippocampus of T2D rats treated by PCDE extract were important findings in this study. The highest dose tested was 4% of the highest safe dose. Our study suggests that PCDE is multi-targeting agent with multiple beneficial activities in combating features of AD. This study may provide a novel therapeutic strategy for AD treatment that warrants clinical studies.
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Conyza dioscoridis (L.) was demonstrated to have anticancer, antioxidant, anti-inflammatory and antidiabetic effects. This study was carried out to investigate the efficacy of polyphenols from Conyza dioscoridis (L.) extract (PCDE) on AD. Impacts of 3 doses of PCDE and donepezil, a reference drug, on the features of Alzheimer's disease in two animal models were investigated. PCDE ameliorated the memory and learning impairment shown in rats following a single dose of scopolamine (scopolamine model) or 17 weeks of high-fat/high-fructose(HF/Hfr) diet coupled with a single dose of streptozotocin, (25 mg/kg) (T2D model). They reduced significantly the high hippocampal cholinesterase activity in the two models of rats. Administration of PCDE for 8 weeks in the T2D model showed a significant reduction in hippocampal GSK-3β, caspase-3 activity and increase in the inhibited glutamate receptor expression (AMPA GluR1 subunit and NMDA receptor subunits NR1, NR2A, NR2B). A significant reduction of HOMA-insulin resistance and serum hypercholesterolemia was observed. The Tau hyperphosphorylation and Aβ 1-42 generation in the hippocampal of T2D rats were significantly decreased by PCDE. Modulation of the oxidative stress markers, (rise in GH and SOD; decrease in MDA levels) and a significant reduction of TNF-α and IL-1β in the hippocampus of T2D rats treated by PCDE extract were important findings in this study. The highest dose tested was 4% of the highest safe dose. Our study suggests that PCDE is multi-targeting agent with multiple beneficial activities in combating features of AD. This study may provide a novel therapeutic strategy for AD treatment that warrants clinical studies.</description><identifier>ISSN: 2662-7671</identifier><identifier>EISSN: 2662-7671</identifier><identifier>EISSN: 1472-6882</identifier><identifier>DOI: 10.1186/s12906-022-03765-0</identifier><identifier>PMID: 36348329</identifier><language>eng</language><publisher>England: BioMed Central Ltd</publisher><subject>Advertising executives ; Alzheimer Disease - drug therapy ; Alzheimer Disease - metabolism ; Alzheimer's disease ; Analysis ; Animal diseases ; Animal models ; Animals ; Anticancer properties ; Antidiabetics ; Antioxidants ; Antitumor agents ; Asteraceae ; Cancer ; Care and treatment ; Caspase-3 ; Cholinesterase ; Conyza ; Dementia ; Diabetes mellitus ; Diabetes Mellitus, Type 2 ; Donepezil ; Fructose ; Glutamate ; Glutamate receptors ; Glutamic acid receptors (ionotropic) ; Glycogen Synthase Kinase 3 beta ; High fat diet ; Hippocampus ; Hypercholesterolemia ; IL-1β ; Inflammation ; Insulin ; Insulin resistance ; Medical research ; Medicine, Experimental ; Models, Animal ; N-Methyl-D-aspartic acid receptors ; Neurodegenerative diseases ; Oxidative stress ; Phosphorylation ; Polyphenols ; Polyphenols - pharmacology ; Rats ; Rats, Wistar ; Receptors ; Reduction ; Rodents ; Scopolamine ; Scopolamine - therapeutic use ; Streptozocin ; Tau protein ; Tumor necrosis factor-α ; Type 2 diabetes ; α-Amino-3-hydroxy-5-methyl-4-isoxazole propionic acid</subject><ispartof>BMC complementary and alternative medicine, 2022-11, Vol.22 (1), p.288</ispartof><rights>2022. 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A significant reduction of HOMA-insulin resistance and serum hypercholesterolemia was observed. The Tau hyperphosphorylation and Aβ 1-42 generation in the hippocampal of T2D rats were significantly decreased by PCDE. Modulation of the oxidative stress markers, (rise in GH and SOD; decrease in MDA levels) and a significant reduction of TNF-α and IL-1β in the hippocampus of T2D rats treated by PCDE extract were important findings in this study. The highest dose tested was 4% of the highest safe dose. Our study suggests that PCDE is multi-targeting agent with multiple beneficial activities in combating features of AD. 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subjects Advertising executives
Alzheimer Disease - drug therapy
Alzheimer Disease - metabolism
Alzheimer's disease
Analysis
Animal diseases
Animal models
Animals
Anticancer properties
Antidiabetics
Antioxidants
Antitumor agents
Asteraceae
Cancer
Care and treatment
Caspase-3
Cholinesterase
Conyza
Dementia
Diabetes mellitus
Diabetes Mellitus, Type 2
Donepezil
Fructose
Glutamate
Glutamate receptors
Glutamic acid receptors (ionotropic)
Glycogen Synthase Kinase 3 beta
High fat diet
Hippocampus
Hypercholesterolemia
IL-1β
Inflammation
Insulin
Insulin resistance
Medical research
Medicine, Experimental
Models, Animal
N-Methyl-D-aspartic acid receptors
Neurodegenerative diseases
Oxidative stress
Phosphorylation
Polyphenols
Polyphenols - pharmacology
Rats
Rats, Wistar
Receptors
Reduction
Rodents
Scopolamine
Scopolamine - therapeutic use
Streptozocin
Tau protein
Tumor necrosis factor-α
Type 2 diabetes
α-Amino-3-hydroxy-5-methyl-4-isoxazole propionic acid
title Polyphenols from Conyza dioscoridis (L.) ameliorate Alzheimer's disease- like alterations through multi-targeting activities in two animal models
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