YEC Focus Nootropic Reviews (Works Or Hoax) Does This Brain Booster Pills Really Works? Benefits & Price Report! v1

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In Silico Design of Dual-Binding Site Anti-Cholinesterase Phytochemical Heterodimers as Treatment Options for Alzheimer's Disease

The number of patients with neurodegenerative diseases, particularly Alzheimer’s disease (AD), continues to grow yearly. Cholinesterase inhibitors (ChEIs) represent the first-line symptomatic drug treatment for mild-to-moderate AD; however, there is an unmet need to produce ChEIs with improved efficacy and reduced side effects. Herein, phytochemicals with reported anti-acetylcholinesterase (AChE) activity were ranked in silico for their anti-AChE potential. Ligands with a similar or higher binding affinity to AChE than galantamine were then selected for the design of novel dual-binding site heterodimeric drugs. In silico molecular docking of heterodimers with the target enzymes, AChE and butyrylcholinesterase (BuChE), were performed, and anti-cholinesterase binding affinities were compared with donepezil. Drug-likeliness properties and toxicity of the heterodimers were assessed using the SwissADME and ProTox-II webservers. Nine phytochemicals displayed similar or higher binding affinities to AChE than galantamine: sanguinarine > huperzine A > chelerythrine > yohimbine > berberine > berberastine > naringenin > akuammicine > carvone. Eleven heterodimeric ligands were designed with phytochemicals separated by four- or five-carbon alkyl-linkers. All heterodimers were theoretically potent AChE and BuChE dual-binding site inhibitors, with the highest affinity achieved with huperzine-4C-naringenin, which displayed 34% and 26% improved affinity to AChE and BuChE, respectively, then the potent ChEI drug, donepezil. Computational pharmacokinetic and pharmacodynamic screening suggested that phytochemical heterodimers would display useful gastrointestinal absorption and with relatively low predicted toxicity. Collectively, the present study suggests that phytochemicals could be garnered for the provision of novel ChEIs with enhanced drug efficacy and low toxicity.

The Efficacy and Safety of Alzheimer’s Disease Therapies: An Updated Umbrella Review

Background: Evidence summaries for efficacy and safety of frequently employed treatments of Alzheimer’s disease (AD) are sparse. Objective: We aimed to perform an updated umbrella review to identify an efficacious and safe treatment for AD patients. Methods: We conducted a search for meta-analyses and systematic reviews on the Embase, PubMed, The Cochrane Library, and Web of Science to address this knowledge gap. We examined the cognitive functions, behavioral symptoms, global clinical assessment, and Activities of Daily Living as efficacy endpoints, and the incidence of adverse events as safety profiles. Results: Sixteen eligible papers including 149 studies were included in the umbrella review. The results showed that AChE inhibitors (donepezil, galantamine, rivastigmine, Huperzine A), Ginkgo biloba, and cerebrolysin appear to be beneficial for cognitive, global performances, and activities of daily living in patients with AD. Furthermore, anti-Aβ agents are unlikely to have an important effect on slowing cognitive or functional impairment in mild to moderate AD. Conclusion: Our study demonstrated that AChE inhibitors, Ginkgo biloba, and cerebrolysin are the optimum cognitive and activities of daily living medication for patients with AD.

Integration of System Biology Tools to Investigate Huperzine A as an Anti-Alzheimer Agent

Aim: The present study aimed to investigate huperzine A as an anti-Alzheimer agent based on the principle that a single compound can regulate multiple proteins and associated pathways, using system biology tools.Methodology: The simplified molecular-input line-entry system of huperzine A was retrieved from the PubChem database, and its targets were predicted using SwissTargetPrediction. These targets were matched with the proteins deposited in DisGeNET for Alzheimer disease and enriched in STRING to identify the probably regulated pathways, cellular components, biological processes, and molecular function. Furthermore, huperzine A was docked against acetylcholinesterase using AutoDock Vina, and simulations were performed with the Gromacs package to take into account the dynamics of the system and its effect on the stability and function of the ligands.Results: A total of 100 targets were predicted to be targeted by huperzine A, of which 42 were regulated at a minimum probability of 0.05. Similarly, 101 Kyoto Encyclopedia of Genes and Genomes pathways were triggered, in which neuroactive ligand–receptor interactions scored the least false discovery rate. Also, huperzine A was predicted to modulate 54 cellular components, 120 molecular functions, and 873 biological processes. Furthermore, huperzine A possessed a binding affinity of −8.7 kcal/mol with AChE and interacted within the active site of AChE via H-bonds and hydrophobic interactions.

In Silico Investigation of Propolis Compounds as Potential Neuroprotective Agent

Alzheimer's disease is a neurodegenerative disorder caused by several factors, namely neuroinflammation, neuronal apoptosis, and low levels of neurotransmitter Acetylcholine. MAPK14, TNF-α, IL-1β, and NF-KB are proteins that are directly involved in the neuroinflammatory signaling pathway. Caspase3 is involved in neuronal apoptosis, and AChE act as a neurotransmitter breakdown catalyst. In this study, docking analysis of propolis compounds was successfully done against six proteins related neurodegenerative. The results show that 18 compounds of propolis have a better binding affinity than standard drugs (donepezil, huperzine A, fostamatinib, and amrinone). For AChE, only isoetin has a lower binding affinity than donepezil. Isoetin was also observed to inhibit the Caspase3, MAPK14, NF-kB, and TNF-α. In silico prediction of the blood-brain barrier (BBB) permeant revealed that three propolis compounds could pass the BBB, they are isoetin; 5,7,8,3′,4′-pentamethoxy flavone; and flavenochromane C. 5,7,8,3′,4′-pentamethoxy flavone can strongly bind to NF-kB and TNF-α, while Flavenochromane C potentially inhibits MAPK14, NF-kB, and TNF-α better than standard drugs. These compounds are firstly reported as neuroprotective agents. They can be further explored and could be used as a backbone molecule to develop a new treatment for neurodegenerative diseases.

Huperzine A and Its Neuroprotective Molecular Signaling in Alzheimer’s Disease

Huperzine A (HupA), an alkaloid found in the club moss Huperzia serrata, has been used for centuries in Chinese folk medicine to treat dementia. The effects of this alkaloid have been attributed to its ability to inhibit the cholinergic enzyme acetylcholinesterase (AChE), acting as an acetylcholinesterase inhibitor (AChEI). The biological functions of HupA have been studied both in vitro and in vivo, and its role in neuroprotection appears to be a good therapeutic candidate for Alzheimer´s disease (AD). Here, we summarize the neuroprotective effects of HupA on AD, with an emphasis on its interactions with different molecular signaling avenues, such as the Wnt signaling, the pre- and post-synaptic region mechanisms (synaptotagmin, neuroligins), the amyloid precursor protein (APP) processing, the amyloid-β peptide (Aβ) accumulation, and mitochondrial protection. Our goal is to provide an integrated overview of the molecular mechanisms through which HupA affects AD.

Fractionation of Lycopodiaceae Alkaloids and Evaluation of Their Anticholinesterase and Cytotoxic Activities

In view of the abundant evidence that Lycopodiaceae alkaloids, including the well-known huperzine A (HupA), are among the potent acetylcholinesterase (AChE) inhibitors, an attempt was made to search for new compounds responsible for this property. For this purpose, three plant species belonging to the Lycopodiaceae family, commonly found in the Euro-Asia region, were subjected to the isolation of bioactive compounds, their identification and subsequent evaluation of their anticholinesterase and cytotoxic activities. Methanolic extracts of two Lycopodium and one Hupezia species were obtained via optimized pressurized liquid extraction (PLE) and then pre-purified using innovative gradient vacuum liquid chromatography (gVLC). For the first time, three sorbents of different porosity packed in polypropylene cartridges and mobile phase systems of different polarity were used to elute the target compounds. This technique proved to be a rapid tool for the obtainment of alkaloid fractions and allowed one to select the appropriate process conditions to yield potent AChE inhibitors in each of the species studied. More than 100 collected fractions were analyzed via HPLC/ESI-QTOF-MS, which enabled one to detect more than 50 compounds, including several new ones previously unreported. Some of them were present in high purity fractions (60–90% of the established purity). TLC bioautography assays proved that the analyzed species are rich sources of AChE inhibitors, but H. selago showed the highest anti-AChE activity. Additionally, the modified silanized silica gel sorbent used allowed one to isolate L. clavatum alkaloids more efficiently using an aqueous reversed-phase solvent system. Furthermore, the tested extracts from the three plant extracts were found to be safe, as they did not exhibit cytotoxicity to skin fibroblasts.

Neuroprotective effects of Huperzine-A in aluminum induced neurotoxicity in hippocampus of mice

Exposure to aluminum has been correlated with the epidemiology of Alzheimer’s disease. Huperzine A (HupA), derived from the Chinese herb Huperzia serrata, is an inhibitor of acetylcholinesterase (AChE). However, its use in aluminum induced neurotoxicity has not been reported. The objective of the study was to examine the effect of HupA on aluminum-induced changes in AChE activity and hippocampal neurotoxicity. Aged female swiss albino mice were divided into five groups (n=10). Aluminum treated group (Al-S) received 30 mg/Kg of aluminum chloride (AlCl3) intraperitoneally (IP) for two weeks followed by IP normal saline. Three HupA treated groups received similar IP dosage of AlCl3 for two weeks followed by HupA 0.1 mg/Kg, HupA 0.2 mg/Kg and HupA 0.5 mg/kg. Control group received IP normal saline. At the end of week 4, AChE was estimated, and pyramidal neurons of hippocampus were counted. Al-S group showed an increase in mean brain AChE and Al-HupA 0.1 reduced it significantly (p<0.05). Reduction in mean neuronal density in Al-S group, was comparatively more in CA3 hippocampal area (p<0.001). Quantitative study found that 0.2mg/Kg of synthetic Huperzine A given intraperitoneally, was able to increase neuronal count significantly compared to 0.1mg/Kg and 0.5mg/Kg of Huperzine A.

Online Promotion of “Brain Health” Supplements

Objective: To identify the dietary supplements most commonly promoted online for brain health and to compare their major ingredients over 18 months. Mild cognitive impairment and Alzheimer’s disease are increasing globally with few effective treatments available. Dietary supplements are widely promoted in the media and online for brain health and memory improvement despite minimal evidence of an actual effect. Methods: Incognito mode on Google Chrome was used to conduct four separate searches using the terms: memory supplement, brain health supplement, Alzheimer’s supplement, and dementia supplement. The four separate searches for products were conducted through CVS, Walgreens, Walmart, GNC, Amazon, Yahoo, and Google. For each website, the top 10 supplement products and their ingredients were documented in August 2017 and again in January 2019. Results: Of the four terms used, “memory supplement” and “brain health supplement” provided the most results. The most common products were Prevagen®, Procera®, and Neuro Health®. Amazon had the most repeated products in 2017 and 2019, while Google and CVS had the least. Focus Factor® appeared 11 times in 2019 compared with once in 2017. At both time points, the most commonly promoted products were proprietary blends of Ginkgo biloba, vitamins, particularly vitamin B12 and folic acid, huperzine-A, Bacopa monnieri, and phosphatidylserine. Conclusions: Though the 2017 and 2019 datasets showed diverse products, the primary ingredients were similar. These supplements have insufficient evidence of efficacy and are expensive. Health professionals must be knowledgeable about dietary supplements for brain health to appropriately counsel individuals.