Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 25
Filtrar
Mais filtros












Base de dados
Intervalo de ano de publicação
1.
Future Sci OA ; 10(1): FSO904, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38827791

RESUMO

Aim: Alzheimer's disease causes dementia which impairs the cognitive domains. Methodology: The pharmacokinetic characteristics and biological activity of echinocystic acid are predicted in this work using in silico or computational approaches, including pkCSM, Swiss ADME, OSIRIS® property explorer, PASS online web resource and MOLINSPIRATION® software. Results & discussion: The compound has lipid metabolism regulating property as major role in decreasing the progression of Alzheimer's disease and it has no major side effects and ADR. The drug also has anti-inflammatory properties which can help in regulating the innate immunity that plays a major role in Alzheimer's disease. Conclusion: From the computational screening, we infer that, echinocystic acid can regulate memory loss, cognitive disability and also slow down the progression of Alzheimer's disease-like pathology.


Alzheimer's disease (AD) is a neurodegenerative disease that is characterized by ß-amyloid (Aß) plaque deposition and neurofibrillary tangles of hyperphosphorylated tau. There is no treatment to completely cure AD and dementia but the progression of the disease can be slowed down and the major symptoms can be treated. Various online servers and web resources were employed in this study. The use of online and offline tools for the prediction and evaluation of the various drug properties and parameters have led to evidential conclusion of the study. The calculated binding affinities for all of the designed compounds range from -1.5 to -6.0 kcal/mol-1, while few receptors showed positive binding affinity indicating less binding with receptor. From the in silico study performed we infer that echinocystic acid can regulate memory loss, cognitive disability and slow down the progression of Alzheimer's disease like pathology.

2.
Future Sci OA ; 10(1): FSO982, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38827809

RESUMO

Aim: Purified anthocyanins lack a detailed safety profile, prompting the need for comprehensive oral toxicity research. Materials & methods: Sprague-Dawley rats aged 8 weeks received 300 mg/kg cyanidin orally for 14 days in acute toxicity (OECD 423). In the subacute study (OECD 407), adult SD rats were administered 7.5, 15 and 30 mg/kg/day cyanidin orally for 28 days. Results: Acute toxicity indicated an LD50 exceeding 300 mg/kg/day without adverse effects. Subacute toxicity at 7.5-30 mg/kg/day showed well-tolerated responses in both genders. No significant alterations in organ weights, hematological parameters, liver/kidney functions or adverse histopathological findings were observed. Conclusion: Oral cyanidin administration demonstrated high safety and tolerance in rats, establishing a NOAEL at 30 mg/kg/day, affirming cyanidin's safety for oral use.


Anthocyanins, natural pigments found in fruits and vegetables, lack a detailed safety profile. This study investigated the oral toxicity of cyanidin, a common anthocyanin. Acute toxicity testing in rats showed no adverse effects at doses up to 300 mg/kg. In the subacute study, doses of 7.5­30 mg/kg/day over 28 days were well tolerated, with no significant negative effects on organ function or histopathology. The findings suggest that cyanidin is safe for oral use in rats, with a No Observed Adverse Effect Level (NOAEL) established at 30 mg/kg/day.


Rat studies reveal cyanidin, a common anthocyanin, shows high oral safety at doses up to 300 mg/kg/day, paving the way for safer dietary supplement use. #Toxicology #SafetyResearch.

3.
EXCLI J ; 23: 534-569, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38741726

RESUMO

Novel treatments are needed as neurological issues become more frequent worldwide. According to the report, plants, oceans, microorganisms, and animals contain interesting drug discovery compounds. Alzheimer's, Parkinson's, and stroke reviews emphasize neurological disorders' complexity and natural substances' safety. Learn about marine-derived and herbal substances' neuroprotective characteristics and applications. Molecular pathways show these substances' neurological healing effects. This article discusses clinical usage of Bryostatin-1, Fucoidan, Icariin, Salvianolic acid, Curcumin, Resveratrol, etc. Their potential benefits for asthma and Alzheimer's disease are complex. Although limited, the study promotes rigorous scientific research and collaboration between traditional and alternative medical practitioners. Unexplored natural compounds, quality control, well-structured clinical trials, and interdisciplinary collaboration should guide future study. Developing and employing natural chemicals to treat neurological illnesses requires ethical sourcing, sustainability, and public awareness. This detailed analysis covers natural chemicals' current state, challenges, and opportunities in neurological disorder treatment. See also the graphical abstract(Fig. 1).

4.
Toxicol Appl Pharmacol ; 487: 116953, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38705400

RESUMO

INTRODUCTION: Research has unveiled the neurotoxicity of Bisphenol A (BPA) linked to neuropathological traits of Alzheimer's disease (AD) through varied mechanisms. This study aims to investigate the neuroprotective properties of cyanidin, an anthocyanin, in an in vivo model of BPA-induced Alzheimer's-like neuropathology. METHODS: Three-week-old Sprague-Dawley rats were randomly assigned to four groups: vehicle control, negative control (BPA exposure), low-dose cyanidin treatment (BPA + cyanidin 5 mg/kg), and high-dose cyanidin treatment (BPA + cyanidin 10 mg/kg). Spatial memory was assessed through behavioral tests, including the Y-maze, novel object recognition, and Morris water maze. After behavioral tests, animals were euthanized, and brain regions were examined for acetylcholinesterase inhibition, p-tau, Wnt3, GSK3ß, and ß-catenin levels, antioxidant activities, and histopathological changes. RESULTS: BPA-exposed groups displayed memory impairments, while cyanidin-treated groups showed significant memory improvement (p < 0.0001). Cyanidin down regulated p-tau and glycogen synthase kinase-3ß (GSK3ß) and restored Wnt3 and ß-catenin levels (p < 0.0001). Moreover, cyanidin exhibited antioxidant properties, elevating catalase and superoxide dismutase levels. The intervention significantly reduced the concentrations of acetylcholinesterase in the cortex and hippocampus in comparison to the groups treated with BPA (p < 0.0001). Significant gender-based disparities were not observed. CONCLUSION: Cyanidin demonstrated potent neuroprotection against BPA-induced Alzheimer's-like neuropathology by enhancing antioxidant defenses, modulating tau phosphorylation by restoring the Wnt/ß-catenin pathway, and ameliorating spatial memory deficits. This study highlights the therapeutic potential of cyanidin in countering neurotoxicity linked to BPA exposure.


Assuntos
Doença de Alzheimer , Antocianinas , Compostos Benzidrílicos , Cognição , Fármacos Neuroprotetores , Fenóis , Ratos Sprague-Dawley , Memória Espacial , Via de Sinalização Wnt , Animais , Fenóis/farmacologia , Fenóis/toxicidade , Compostos Benzidrílicos/toxicidade , Compostos Benzidrílicos/farmacologia , Antocianinas/farmacologia , Antocianinas/uso terapêutico , Doença de Alzheimer/induzido quimicamente , Doença de Alzheimer/tratamento farmacológico , Doença de Alzheimer/patologia , Memória Espacial/efeitos dos fármacos , Masculino , Ratos , Via de Sinalização Wnt/efeitos dos fármacos , Fármacos Neuroprotetores/farmacologia , Fármacos Neuroprotetores/uso terapêutico , Cognição/efeitos dos fármacos , Modelos Animais de Doenças , Aprendizagem em Labirinto/efeitos dos fármacos , Encéfalo/efeitos dos fármacos , Encéfalo/metabolismo , Encéfalo/patologia
5.
ACS Omega ; 9(8): 8615-8631, 2024 Feb 27.
Artigo em Inglês | MEDLINE | ID: mdl-38434844

RESUMO

Pollution is ubiquitous, and much of it is anthropogenic in nature, which is a severe risk factor not only for respiratory infections or asthma sufferers but also for Alzheimer's disease, which has received a lot of attention recently. This Review aims to investigate the primary environmental risk factors and their profound impact on Alzheimer's disease. It underscores the pivotal role of multidimensional imaging in early disease identification and prevention. Conducting a comprehensive review, we delved into a plethora of literature sources available through esteemed databases, including Science Direct, Google Scholar, Scopus, Cochrane, and PubMed. Our search strategy incorporated keywords such as "Alzheimer Disease", "Alzheimer's", "Dementia", "Oxidative Stress", and "Phytotherapy" in conjunction with "Criteria Pollutants", "Imaging", "Pathology", and "Particulate Matter". Alzheimer's disease is not only a result of complex biological factors but is exacerbated by the infiltration of airborne particles and gases that surreptitiously breach the nasal defenses to traverse the brain, akin to a Trojan horse. Various imaging modalities and noninvasive techniques have been harnessed to identify disease progression in its incipient stages. However, each imaging approach possesses inherent limitations, prompting exploration of a unified technique under a single umbrella. Multidimensional imaging stands as the linchpin for detecting and forestalling the relentless march of Alzheimer's disease. Given the intricate etiology of the condition, identifying a prospective candidate for Alzheimer's disease may take decades, rendering the development of a multimodal imaging technique an imperative. This research underscores the pressing need to recognize the chronic ramifications of invisible particulate matter and to advance our understanding of the insidious environmental factors that contribute to Alzheimer's disease.

6.
Toxicol Rep ; 12: 307-317, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38495473

RESUMO

The loofah/sponge gourd Luffa cylindrica (L.), a member of the Cucurbitaceae family, is one of the neglected medicinal plants. Traditionally, Luffa cylindrica is prescribed for inducing labor. It has a long history of use in China for the treatment of fever, diabetes, dyspnea, and dysentery. This study investigated the toxicity profile of the alkaloid-rich fraction of Luffa cylindrica (ARF-LC) for the first time in Sprague Dawley rats. A total of 80 rats (40 male and 40 female rats) aged 13 weeks old and weighing 200-220 g were selected for this study. In SD rats, sub-chronic oral toxicity was investigated at doses of 100, 200, and 400 mg/kg/d for a total of 90 days, followed by a 30-day recovery period. The results showed no variation in body weight among the three dose groups compared to the control group. Treatment-related adverse events, such as alterations in hematology and serum biochemistry parameters and the histology of the liver were sporadic in the high-dose rats but within the reference range. However, these changes disappeared after the doses were withdrawn during the recovery period. In conclusion, the "no observed adverse effect level" (NOAEL) of oral administration of ARF-LC in SD rats was considered 400 mg/kg/d and can be studied for its potential in further in vivo chronic investigations.

7.
Artigo em Inglês | MEDLINE | ID: mdl-38310450

RESUMO

Drug repurposing is an ongoing and clever strategy that is being developed to eradicate tuberculosis amid challenges, of which one of the major challenges is the resistance developed towards antibiotics used in standard directly observed treatment, short-course regimen. Surpassing the challenges in developing anti-tuberculous drugs, some novel host-directed therapies, repurposed drugs, and drugs with novel targets are being studied, and few are being approved too. After almost 4 decades since the approval of rifampicin as a potent drug for drugsusceptible tuberculosis, the first drug to be approved for drug-resistant tuberculosis is bedaquiline. Ever since the urge to drug discovery has been at a brisk as this milestone in tuberculosis treatment has provoked the hunt for novel targets in tuberculosis. Host-directed therapy and repurposed drugs are in trend as their pharmacological and toxicological properties have already been researched for some other diseases making the trial facile. This review discusses the remonstrance faced by researchers in developing a drug candidate with a novel target, the furtherance in tuberculosis research, novel anti-tuberculosis agents approved so far, and candidates on trial including the host-directed therapy, repurposed drug and drug combinations that may prove to be potential in treating tuberculosis soon, aiming to augment the awareness in this context to the imminent researchers.

8.
Artigo em Inglês | MEDLINE | ID: mdl-38409725

RESUMO

BACKGROUND: Parkinson's disease is defined by the loss of dopaminergic neurons in the midbrain of substantia nigra associated with Lewy bodies. The precise mechanism is not yet entirely understood. OBJECTIVE: The study aims to determine whether ocimene has antiparkinsonian activity by reducing α-Synuclein aggregation levels in the brains of rotenone-induced rat models. METHODS: 36 male rats were used for six groups, with six animals in each group. Vehicle, control (rotenone, 2.5 mg/kg, i.p), standard (L-Dopa, 10 mg/kg, i.p), Test drug of low dose (66.66 mg/kg, i.p), medium dose (100 mg/kg, i.p), and high dose (200 mg/kg, i.p) were administered to the rats. The open field, actophotometer, hanging wire, and catalepsy tests were used to assess the rat's motor performance. The expressions of biomarkers such as AchE, D2 Receptor, and α- Synuclein were evaluated, and their level of expression in the brain samples was checked using ELISA. Histopathological analysis was also carried out to determine the degree of neuron degeneration in the brain samples. RESULTS: The open field test showed significant anxiety levels, whereas test groups showed fewer anxiety levels but increased motor activity. The biochemical tests revealed that rotenonetreated rats had higher levels of AchE, but ocimene-treated rats had a significant decrease in AchE levels. The test drug-treated rats also expressed high levels of D2 receptors. In ocimenetreated rats, α-Synuclein aggregation was reduced, however, in rotenone-treated rats' brain samples, higher clumps of α-Synuclein were observed. CONCLUSION: Ocimene has neuroprotective properties. As a result, this essential oil might be helpful as a therapeutic treatment for Parkinson's disease.

9.
Curr Pediatr Rev ; 2024 Jan 11.
Artigo em Inglês | MEDLINE | ID: mdl-38213179

RESUMO

BACKGROUND: Childhood obesity is significantly influenced by maternal exposure to Per- and Poly-Fluoroalkyl Substances (PFAS) during pregnancy. PFAS exposure occurs through the Peroxisome Proliferator-Activated Receptor (PPAR-γ) receptor, leading to increased fat deposition and profound health effects in child growth and development. Despite ongoing investigations, the relationship between maternal serum PFAS concentration and child obesity requires further exploration. OBJECTIVE: This study aimedto review the possible effects of Per and poly-fluoroalkyl substances exposure and their mechanism in overweight/obese children from pregnant ladies. METHODS: A detailed literature survey was conducted using online databases, including Science Direct, Google Scholar, Scopus, Cochrane, and PubMed. The study focused on the diverse effects of PFAS on maternal and child health, with particular emphasis on neurological complications. RESULTS: Child growth development depends upon breastfeeding and placenta health, which is disrupted by PFAS exposure, ultimately destroying the body mass index of the child. Neurotoxicity testing utilized the SH-SY5Y human-derived cell line as an in vitro model, revealing PFAS-induced increases in adipocyte number, reduced cell size, altered lipid conglomeration, increased adiposity, and changes in liver function. in vivo studies in mice and human cell lines indicated PPAR-γ and ER-α activation, leading to adiposity and weight gain through Estrogen signaling and Lipid metabolism. PFAS concentrations positively correlated in maternal sera, analyzed by liquid chromatography/quadrupole mass spectrometry. CONCLUSION: PFAS, with a long half-life of 3.5-8.5 years, is commonly found in the serum of pregnant women, crossing the placenta barrier. This exposure disrupts placental homeostasis, negatively impacting mechanisms of action and potentially leading to deterioration in pregnancy and child health. Further research is needed to comprehensively understand the complex interplay between PFAS exposure and its implications for maternal and child well-being.

10.
Curr Drug Discov Technol ; 21(2): e250124226256, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38279724

RESUMO

BACKGROUND: Bisphenol A (BPA) is a known neurotoxic compound with potentially harmful effects on the nervous system. Cyanidin (CYN) has shown promise as a neuroprotective agent. OBJECTIVE: The current study aims to determine the efficacy of CYN against BPA-induced neuropathology. METHODS: In vitro experiments utilized PC12 cells were pre-treated with gradient doses of CYN and further stimulated with 10ng/ml of BPA. DPPH radical scavenging activity, catalase activity, total ROS activity, and nitric oxide radical scavenging activity were done. In vivo assessments employed doublecortin immunohistochemistry of the brain in BPA-exposed Sprague-Dawley rats. Further, In silico molecular docking of CYN with all proteins involved in canonical Wnt signaling was performed using the Autodock v4.2 tool and BIOVIA Discovery Studio Visualizer. RESULTS: IC50 values of CYN and ascorbic acid were determined using dose-response curves, and it was found to be 24.68 ± 0.563 µg/ml and 20.69 ± 1.591µg/ml, respectively. BPA-stimulated cells pre-treated with CYN showed comparable catalase activity with cells pre-treated with ascorbic acid (p = 0.0287). The reactive species production by CYN-treated cells was significantly decreased compared to BPA-stimulated cells (p <0.0001). Moreover, CYN significantly inhibited nitric oxide production compared to BPA stimulated and the control cells (p < 0.0001). In vivo CYN positively affected immature neuron quantity, correlating with dosage. During molecular docking analysis, CYN exhibited a binding affinity > -7 Kcal/mol with all the key proteins associated with the Wnt/ß- catenin signaling cascade. CONCLUSION: Conclusively, our finding suggests that CYN exhibited promise in counteracting BPAinduced oxidative stress, improving compromised neurogenesis in hippocampal and cortical regions, and displaying notable interactions with Wnt signaling proteins. Thereby, CYN could render its neuroprotective potential against BPA-induced neuropathology.


Assuntos
Antocianinas , Compostos Benzidrílicos , Simulação de Acoplamento Molecular , Neurogênese , Fármacos Neuroprotetores , Estresse Oxidativo , Fenóis , Ratos Sprague-Dawley , Animais , Fenóis/farmacologia , Fenóis/uso terapêutico , Compostos Benzidrílicos/farmacologia , Compostos Benzidrílicos/toxicidade , Estresse Oxidativo/efeitos dos fármacos , Ratos , Células PC12 , Neurogênese/efeitos dos fármacos , Fármacos Neuroprotetores/farmacologia , Fármacos Neuroprotetores/uso terapêutico , Antocianinas/farmacologia , Antocianinas/uso terapêutico , Síndromes Neurotóxicas/tratamento farmacológico , Síndromes Neurotóxicas/metabolismo , Masculino , Antioxidantes/farmacologia
11.
Mol Neurobiol ; 61(4): 2064-2080, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-37843801

RESUMO

Alzheimer's disease (AD) is a progressive neurodegenerative disorder causing memory loss and cognitive decline, linked to amyloid-beta (Aß) plaques and hyperphosphorylated tau protein accumulation in the brain. Environmental pollutant bisphenol A (BPA) has been implicated in AD pathology due to its neurotoxic effects. This study aims to evaluate cyanidin from flower bracts of Musa acuminata Colla (red variety; AAA group) for its neuroprotective properties against BPA-induced AD pathology. The extraction of cyanidin was optimized using 70% ethanol in acidified water, showing promising anti-acetylcholinesterase activity. Cyanidin was effectively purified from the resultant extract and characterized using spectroscopic techniques. Two gradient doses of cyanidin (90 and 10 µg/ml) were determined based on cell viability assay. The role of cyanidin in promoting nerve growth and differentiation was assessed in PC12 cells for up to 72 h. A discernible and statistically significant difference was assessed in neurite extension at both doses at 72 h, followed by pre-treatment with cyanidin. BPA stimulation significantly increased the p-tau expression compared to the control (p < 0.0001). Pre-treatment with cyanidin reduced the tau expression; however, a significant difference was observed compared to control cells (p = 0.0003). Cyanidin significantly enhanced the mRNA expression of Wnt3a (p < 0.0001), ß-catenin (p = 0.0004), and NeuroD1 (p = 0.0289), and decreased the expression of WIF1(p = 0.0040) and DKK1 (p < 0.0001), which are Wnt antagonist when compared to cells stimulated with BPA. Conclusively, our finding suggests that cyanidin could agonize nerve growth factor and promote neuronal differentiation, reduce tau-hyperphosphorylation by restoring the Wnt/ß-catenin signaling cascade, and thereby render its neuroprotective potential against BPA-induced AD pathology.


Assuntos
Doença de Alzheimer , Antocianinas , Compostos Benzidrílicos , Fenóis , Ratos , Animais , Doença de Alzheimer/patologia , beta Catenina/metabolismo , Proteínas tau/metabolismo , Via de Sinalização Wnt , Peptídeos beta-Amiloides/metabolismo
12.
Front Neurol ; 14: 1303111, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-38125832

RESUMO

In the realm of Alzheimer's disease, the most prevalent form of dementia, the impact of environmental factors has ignited intense curiosity due to its substantial burden on global health. Recent investigations have unveiled these environmental factors as key contributors, shedding new light on their profound influence. Notably, emerging evidence highlights the detrimental role of various environmental contaminants in the incidence and progression of Alzheimer's disease. These contaminants encompass a broad spectrum, including air pollutants laden with ozone, neurotoxic metals like lead, aluminum, manganese, and cadmium, pesticides with their insidious effects, and the ubiquitous presence of plastics and microplastics. By meticulously delving into the intricate web connecting environmental pollutants and this devastating neurological disorder, this comprehensive chapter takes a deep dive into their involvement as significant risk factors for Alzheimer's disease. Furthermore, it explores the underlying molecular mechanisms through which these contaminants exert their influence, aiming to unravel the complex interactions that drive the pathogenesis of the disease. Additionally, this chapter proposes potential strategies to mitigate the detrimental effects of these environmental contaminants on brain health, with the ultimate goal of restoring and preserving typical cognitive function. Through this comprehensive exploration, we aim to enhance our understanding of the multifaceted relationship between neurotoxins and Alzheimer's disease, providing a solid foundation for developing innovative in-vivo models and advancing our knowledge of the intricate pathological processes underlying this debilitating condition.

13.
Front Pharmacol ; 14: 1283440, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37942488

RESUMO

This systematic review analyzes monosodium glutamate (MSG) in the Alzheimer's disease-like condition to enhance translational research. Our review seeks to understand how MSG affects the brain and causes degenerative disorders. Due to significant preclinical data linking glutamate toxicity to Alzheimer's disease and the lack of a comprehensive review or meta-analysis, we initiated a study on MSG's potential link. We searched PubMed, ScienceDirect, ProQuest, DOAJ, and Scopus for animal research and English language papers without time constraints. This study used the PRISMA-P framework and PICO technique to collect population, intervention or exposure, comparison, and result data. It was registered in PROSPERO as CRD42022371502. MSG affected mice's exploratory behaviors and short-term working memory. The brain, hippocampus, and cerebellar tissue demonstrated neuronal injury-related histological and histomorphometric changes. A total of 70% of MSG-treated mice had poor nesting behavior. The treated mice also had more hyperphosphorylated tau protein in their cortical and hippocampus neurons. Glutamate and glutamine levels in the brain increased with MSG, and dose-dependent mixed horizontal locomotor, grooming, and anxiety responses reduced. MSG treatment significantly decreased phospho-CREB protein levels, supporting the idea that neurons were harmed, despite the increased CREB mRNA expression. High MSG doses drastically lower brain tissue and serum serotonin levels. In conclusion, MSG showed AD-like pathology, neuronal atrophy, and short-term memory impairment. Further research with a longer time span and deeper behavioral characterization is needed. Systematic review registration: https://www.crd.york.ac.uk/prospero/, identifier [CRD42022371502].

14.
RSC Adv ; 13(48): 33770-33785, 2023 Nov 16.
Artigo em Inglês | MEDLINE | ID: mdl-38019988

RESUMO

Cancer prevalence and resistance issues in cancer treatment are a significant public health concern globally. Among the existing strategies in cancer therapy, targeting cyclin-dependent kinases (CDKs), especially CDK-6 is found to be one of the most promising targets, as this enzyme plays a pivotal role in cell cycle stages and cell proliferation. Cell proliferation is the characteristic feature of cancer giving rise to solid tumours. Our research focuses on creating novel compounds, specifically, pyrazolopyrimidine fused azetidinones, using a groundbreaking molecular hybridization approach to target CDK-6. Through computational investigations, ligand-based pharmacophore modelling, pharmacokinetic studies (ADMET), molecular docking, and dynamics simulations, we identified 18 promising compounds. The pharmacophore model featured one aromatic hydrophobic centre (F1: Aro/Hyd) and two H-bond acceptors (F2 and F3: Acc). Molecular docking results showed favourable binding energies (-6.5 to -8.0 kcal mol-1) and effective hydrogen bonds and hydrophobic interactions. The designed compounds demonstrated good ADMET profiles. Specifically, B6 and B18 showed low energy conformation (-7.8 kcal and -7.6 kcal), providing insights into target inhibition compared to the standard drug Palbociclib. Extensive molecular dynamics simulations confirmed the stability of these derivatives. Throughout the 100 ns simulation, the ligand-protein complexes maintained structural stability, with acceptable RMSD values. These compounds hold promise as potential leads in cancer therapy.

15.
Ageing Res Rev ; 91: 102045, 2023 11.
Artigo em Inglês | MEDLINE | ID: mdl-37652313

RESUMO

Together with cities in higher-income nations, it is anticipated that the real global ozone is rising in densely populated areas of Asia and Africa. This review aims to discuss the possible neurotoxic pollutants and ozone-induced neurotoxicity: in vitro and in vivo, along with possible biomarkers to assess ozone-related oxidative stress. As a methodical and scientific strategy for hazard identification and risk characterization of human chemical exposures, toxicological risk assessment is increasingly being implemented. While traditional methods are followed by in vitro toxicology, cell culture techniques are being investigated in modern toxicology. In both human and rodent models, aging makes the olfactory circuitry vulnerable to spreading immunological responses from the periphery to the brain because it lacks the blood-brain barrier. The ozone toxicity is elusive as it shows ventral and dorsal root injury cases even in the milder dose. Its potential toxicity should be disclosed to understand further the clear mechanism insights of how it acts in cellular aspects. Human epidemiological research has confirmed the conclusions that prenatal and postnatal exposure to high levels of air pollution are linked to behavioral alterations in offspring. O3 also enhances blood circulation. It has antibacterial action, which may have an impact on the gut microbiota. It also activates immunological, anti-inflammatory, proteasome, and growth factor signaling Prolonged O3 exposure causes oxidative damage to plasma proteins and lipids and damages the structural and functional integrity of the mitochondria. Finally, various studies need to be conducted to identify the potential biomarkers associated with ozone and the brain.


Assuntos
Poluentes Atmosféricos , Poluição do Ar , Ozônio , Feminino , Gravidez , Humanos , Ozônio/toxicidade , Ozônio/análise , Poluentes Atmosféricos/toxicidade , Estresse Oxidativo , Biomarcadores
16.
Curr Drug Metab ; 24(4): 250-269, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37291784

RESUMO

For the brain to operate normally and to develop with structural integrity in addition to neuronal function, blood-brain barrier present in brain capillaries serves as a vital barrier mechanism. In addition to the transport barrier created by membranes, transporters, and vesicular processes, the structure and function of the BBB are summarised. The physical barrier is created by endothelial tight junctions. The permeability and transport of molecules between extracellular fluid and plasma are constrained by the presence of tight junctions between neighbouring endothelial cells. Each solute must pass through both membranes in the luminal and abluminal divisions. The functions of the neurovascular unit are described, with special emphasis on the pericytes, microglia, and astrocyte endfeet. The luminal membrane contains five separate facilitative transport mechanisms, each of which is exclusive to a few substrates. Nevertheless, the import of big-branched and aromatic neutral amino acids is facilitated by two key carriers (System L and y+) in the plasma membrane. It is asymmetrically present in both membranes. The sodium pump Na+/K+-ATPase is highly expressed in the abluminal membrane, where many Na+ dependent transport mechanisms move amino acids against its concentration gradient. The trojan horse strategy, which uses molecular tools to bind the medication and its formulations, is also preferred in drug delivery. The BBB's cellular structure, the transport systems unique to each substrate, and the necessity to identify transporters with changes that assist the transfer of various medications have all been changed in the current work. Nevertheless, to rule out the BBB passage for the new class of neuroactive medications, the mixing of traditional pharmacology and nanotechnology needs to be focused on outcomes that show promise.


Assuntos
Barreira Hematoencefálica , Células Endoteliais , Barreira Hematoencefálica/metabolismo , Células Endoteliais/metabolismo , Transporte Biológico , Encéfalo/metabolismo , Aminoácidos/metabolismo , Proteínas de Membrana Transportadoras/metabolismo
17.
Future Sci OA ; 9(4): FSO855, 2023 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-37090488

RESUMO

Aim: To perform in vitro analysis of antioxidant and antiurolithiasis to carry out GC-MS-based metabolite profile. Materials & methods: The effect of apple cider vinegar (ACV) in vitro, antioxidant and GC-MS analysis was evaluated. The antioxidant studies were performed. In vitro techniques included nucleation, aggregation and growth assay. Results & conclusion: The presence of polyphenols, flavonoids, alkaloids and carbohydrates was shown. Concentrations from 5-30 µg/ml could dissolve calcium oxalate (p < 0.05) in vitro. The IC50 value of ACV in DPPH was found to be around 7 µg/ml and the IC50 value of the ACV in ABTS assay was around 9 µg/ml. Different phytocompounds were obtained from GC-MS analysis. ACV can be consumed to prevent kidney stones which seems helpful to the current therapy.


Due to the modern lifestyle, urolithiasis continues to be a global medical burden and is getting worse every day and seems to have a very high recurrence rate. Urolithiasis can be managed with the pharmacotherapy of drugs and the usage of medicinal plants and nutraceuticals. The effect of apple juice products on urine physiology has been studied profoundly. The product thus obtained was examined for antioxidant assay using DPPH and in vitro antiurolithiasis activity. Apple cider vinegar (ACV) exhibited dose-dependent radical scavenging activity against free radicals. The ACV demonstrated a substantial suppression of the DPPH radical in the DPPH assay. ACV could be a potential source of a natural antioxidant drink based on in vitro, phytochemical and GC­MS analysis which was noteworthy and thus can be used as a therapeutic agent against bladder stones.

18.
J Biochem Mol Toxicol ; 37(5): e23327, 2023 May.
Artigo em Inglês | MEDLINE | ID: mdl-36807623

RESUMO

Majority of chemotherapeutic agents can elicit antitumor immunity and modulate the composition, density, function, and distribution of tumor infiltrating lymphocytes (TILs), to influence differential therapeutic responses and prognosis in cancer patients. The clinical success of these agents, particularly anthracyclines like doxorubicin, not only depends on their cytotoxic activity but also by the enhancement of pre-existing immunity primarily through induction of immunogenic cell death (ICD). However, resistance for the induction of ICD either intrinsic or acquired is a major hurdle for most of these drugs. To enhance ICD by these agents, it has become clear that blockade of adenosine production or its signaling need to be specifically targeted as they represent highly resistant mechanisms. Given the prominent role of adenosine mediated immunosuppression and resistance to ICD induction in tumor microenvironment, combination strategies that involve ICD induction and adenosine signaling blockade are further warranted. In the present study, we investigated the antitumor effect of caffeine and doxorubicin combination therapy against 3-MCA-induced and cell-line induced tumors in mice. Our results demonstrated significant tumor growth inhibition by the combination therapy of doxorubicin and caffeine against both carcinogen-induced and cell-line induced tumor models. In addition, significant T-cell infiltration and enhanced ICD induction evidenced by increased intratumoral calreticulin and HMGB1 levels, was observed in B16F10 melanoma mice. The possible mechanism behind the observed antitumor activity might be due to the enhanced ICD induction and subsequent T-cell infiltration by the combination therapy. To prevent the development of resistance and to enhance the antitumor activity of ICD inducing drugs like doxorubicin, combination with adenosine-A2A receptor pathway inhibitors like caffeine might be a potential strategy.


Assuntos
Cafeína , Melanoma , Animais , Camundongos , Cafeína/farmacologia , Cafeína/uso terapêutico , Morte Celular Imunogênica , Linfócitos T , Melanoma/tratamento farmacológico , Doxorrubicina/farmacologia , Doxorrubicina/uso terapêutico , Adenosina , Microambiente Tumoral
19.
Curr Diabetes Rev ; 19(1): e240322202561, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-35331118

RESUMO

Latent Onset Autoimmune Diabetes in Adults (LADA) is an autoimmune disorder between T1DM and T2DM and is often misdiagnosed as T2DM due to its late-onset. The disease is characterized by ß-cell failure and slow progression to insulin dependence. Early diagnosis is significant in limiting disease progression. C-peptide levels and autoantibodies against ß-cells are the most critical diagnostic biomarkers in LADA. The review aims to provide an overview of the biomarkers used to diagnose LADA, and the following treatment approaches. We have summarized LADA's pathophysiology and the autoantibodies involved in the condition, diagnostic approaches, and challenges. There are clear shortcomings concerning the feasibility of autoantibody testing. Finally, we have explored the treatment strategies involved in the management of LADA. In conclusion, the usual management includes treatment with metformin and the addition of low doses of insulin. Newer oral hypoglycaemic agents, such as GLP-1RA and DPP-4 inhibitors, have been brought into use. Since the disease is not entirely understood at the research level and in clinical practice, we hope to encourage further research in this field to assess its prevalence. Large randomized controlled trials are required to compare the efficacy of different available treatment options.


Assuntos
Diabetes Mellitus Tipo 1 , Diabetes Mellitus Tipo 2 , Diabetes Autoimune Latente em Adultos , Adulto , Humanos , Diabetes Mellitus Tipo 1/diagnóstico , Diabetes Mellitus Tipo 1/tratamento farmacológico , Autoanticorpos , Insulina/uso terapêutico , Diabetes Autoimune Latente em Adultos/diagnóstico , Diabetes Autoimune Latente em Adultos/tratamento farmacológico , Biomarcadores
20.
Neurosci Biobehav Rev ; 143: 104939, 2022 12.
Artigo em Inglês | MEDLINE | ID: mdl-36328120

RESUMO

This systematic-review probes the deleterious outcome of Bisphenol A (BPA) exposure on cognition/memory by scrutinizing the extant preclinical studies on this focus, to promote apprehension about this environmental toxin among the general population with a long-term goal to build a plastic (BPA)-free future. Bibliographic databases, including Scopus, ProQuest, PubMed, Google Scholar, DOAJ, and ScienceDirect were searched for preclinical reports assessing the impact of BPA exposure on memory/cognition. The review protocol has been published in PROSPERO with the registration number CRD42022333965. The SYRCLE's RoB tool was implemented to assess the risk of bias in the retrieved reports. The review finally comprehended 22 reports. Results of 22 reports compositely suggest that maternal exposure to BPA raises the likelihood of the fetus enduring neuro-developmental dysfunction, which may manifest as memory/cognitive decline. BPA impairs memory and cognition by binding to estrogen receptors, inhibiting ERK-CREB-BDNF signaling pathway, altering the expression of synaptic proteins, impairing the morphology of pyramidal neurons in the hippocampus, dysregulation of thyroid hormones, and altering the neurotransmitter levels.


Assuntos
Disfunção Cognitiva , Disruptores Endócrinos , Feminino , Humanos , Disruptores Endócrinos/toxicidade , Compostos Benzidrílicos/toxicidade , Fenóis/toxicidade , Disfunção Cognitiva/induzido quimicamente
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...