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1.
Biogerontology ; 21(5): 669-682, 2020 10.
Artigo em Inglês | MEDLINE | ID: mdl-32506187

RESUMO

Aging is related to the lowered overall functioning and increased risk for various age-related diseases in humans. Tectochrysin is a flavonoid compound and rich in a traditional Chinese Medicine Alpinia oxyphylla Miq., which has antioxidant, anti-inflammatory, anti-cancer, anti-bacterial, anti-diarrhea, hepatoprotective, and neuro-protective effects. Therefore, we tested if tectochrysin had an effect on aging in Caenorhabditis elegans (C. elegans). Our results showed that tectochrysin could extend the lifespan of C. elegans by up to 21.0%, delay the age-related decline of body movement, improve high temperature-stress resistance and anti-infection capacity, and protected worms against Aß1-42-induced toxicity. Tectochrysin could not extend the lifespan of the mutants from genes daf-2, daf-16, eat-2, aak-2, skn-1, and hsf-1. Tectochrysin could increase the expression of DAF-16 regulated genes. The extension of lifespan by tectochrysin requires FOXO/DAF-16 and HSF-1. Overall, our findings suggest that tectochrysin may have a potential effect on extending lifespan and age-related diseases.


Assuntos
Proteínas de Caenorhabditis elegans , Caenorhabditis elegans , Flavonoides/farmacologia , Longevidade , Animais , Caenorhabditis elegans/efeitos dos fármacos , Caenorhabditis elegans/metabolismo , Proteínas de Caenorhabditis elegans/metabolismo , Fatores de Transcrição Forkhead/metabolismo , Estresse Fisiológico , Fatores de Transcrição/metabolismo
2.
Molecules ; 23(6)2018 Jun 05.
Artigo em Inglês | MEDLINE | ID: mdl-29874836

RESUMO

Aging is a major risk factor for many prevalent diseases. Pharmacological intervention to improve the health span and extend the lifespan could be a preventive elixir for aging and age-related diseases. The non-steroid anti-inflammation medicine aspirin was reported to delay aging in Caenorhabditis elegans (C. elegans) and mice. We are wondering if the analogues of aspirin could also present antiaging activity. Here, we synthesized several aspirin derivatives and investigated their thermotolerance and antiaging effect in C. elegans. One of the compounds, 5-(bis(3-methylbut-2-en-1-yl)amino)-2-hydroxybenzoic acid, moderately increased the survival of C. elegans under heat stress, but could not extend the lifespan under optimum conditions. This compound could increase the mRNA level of stress response gene gst-4, and the mRNA and protein expression level of heat shock protein hsp-16.2 under heat stress. The failure of activating the transcription factor DAF-16 might explain why this compound could not act as aspirin to extend the lifespan of C. elegans. Our results would help further the investigation of the pharmacological activity of aspirin analogues and the relationship between structures and activity.


Assuntos
Adaptação Fisiológica/efeitos dos fármacos , Aspirina/análogos & derivados , Caenorhabditis elegans/efeitos dos fármacos , Resposta ao Choque Térmico , Proteínas de Helminto/metabolismo , Temperatura Alta , Animais , Aspirina/química , Aspirina/farmacologia , Caenorhabditis elegans/metabolismo , Caenorhabditis elegans/fisiologia , Proteínas de Helminto/genética , Longevidade , RNA Mensageiro/genética
3.
Mol Cell Biochem ; 426(1-2): 101-109, 2017 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-27854075

RESUMO

With the growth of aging population, there is increasing demand to develop strategy to improve the aging process and aging-related diseases. Benzimidazole and its derivatives are crucial heterocyclic backbone of many drugs and compounds with diverse therapeutic applications, including alleviation of aging-related diseases. Here, we investigate if the benzimidazole derivative n-butyl-[1H]-benzimidazol-2-amine (M084), a novel inhibitor of TRPC4 and TRPC5 channels and antidepressant, could affect the lifespan of Caenorhabditis elegans (C. elegans). Our results showed that M084 could extend the lifespan of C. elegans, delay age-related decline of phenotypes, and improve stress resistance. M084 could not extend the lifespan of the loss-of-function mutants of daf-16, daf-2, pdk-1, aak-2, clk-1, isp-1, sir-2.1, and skn-1. M084 could decrease the ATP level and increase the gene expression of mitochondrial unfolded protein response factors. Thus, M084 might inhibit the mitochondrial respiration, activate mitochondrial unfolded protein response and AMPK, recruite SIR-2.1 and SKN-1, and finally through the transcription factor DAF-16, delay the aging process of C. elegans. Our findings reveal the new pharmaceutical potential of benzimidazole derivatives and provide clue for developing novel anti-aging agents.


Assuntos
Benzimidazóis/farmacologia , Proteínas de Caenorhabditis elegans/metabolismo , Caenorhabditis elegans/metabolismo , Fatores de Transcrição Forkhead/metabolismo , Longevidade/efeitos dos fármacos , Animais , Benzimidazóis/química , Caenorhabditis elegans/genética , Proteínas de Caenorhabditis elegans/genética , Fatores de Transcrição Forkhead/genética , Longevidade/genética , Mitocôndrias/genética , Mitocôndrias/metabolismo , Proteínas Mitocondriais/genética , Proteínas Mitocondriais/metabolismo , Mutação , Consumo de Oxigênio/efeitos dos fármacos , Consumo de Oxigênio/genética , Resposta a Proteínas não Dobradas/efeitos dos fármacos
4.
Hum Mol Genet ; 22(18): 3641-53, 2013 Sep 15.
Artigo em Inglês | MEDLINE | ID: mdl-23669348

RESUMO

5-Hydroxymethylcytosine (5-hmC) may represent a new epigenetic modification of cytosine. While the dynamics of 5-hmC during neurodevelopment have recently been reported, little is known about its genomic distribution and function(s) in neurodegenerative diseases such as Huntington's disease (HD). We here observed a marked reduction of the 5-hmC signal in YAC128 (yeast artificial chromosome transgene with 128 CAG repeats) HD mouse brain tissues when compared with age-matched wild-type (WT) mice, suggesting a deficiency of 5-hmC reconstruction in HD brains during postnatal development. Genome-wide distribution analysis of 5-hmC further confirmed the diminishment of the 5-hmC signal in striatum and cortex in YAC128 HD mice. General genomic features of 5-hmC are highly conserved, not being affected by either disease or brain regions. Intriguingly, we have identified disease-specific (YAC128 versus WT) differentially hydroxymethylated regions (DhMRs), and found that acquisition of DhmRs in gene body is a positive epigenetic regulator for gene expression. Ingenuity pathway analysis (IPA) of genotype-specific DhMR-annotated genes revealed that alternation of a number of canonical pathways involving neuronal development/differentiation (Wnt/ß-catenin/Sox pathway, axonal guidance signaling pathway) and neuronal function/survival (glutamate receptor/calcium/CREB, GABA receptor signaling, dopamine-DARPP32 feedback pathway, etc.) could be important for the onset of HD. Our results indicate that loss of the 5-hmC marker is a novel epigenetic feature in HD, and that this aberrant epigenetic regulation may impair the neurogenesis, neuronal function and survival in HD brain. Our study also opens a new avenue for HD treatment; re-establishing the native 5-hmC landscape may have the potential to slow/halt the progression of HD.


Assuntos
Encéfalo/metabolismo , Corpo Estriado/metabolismo , Citosina/análogos & derivados , Doença de Huntington/genética , Doença de Huntington/metabolismo , 5-Metilcitosina/análogos & derivados , Animais , Encéfalo/fisiopatologia , Corpo Estriado/fisiopatologia , Citosina/metabolismo , Metilação de DNA , Modelos Animais de Doenças , Epigenômica , Humanos , Doença de Huntington/fisiopatologia , Camundongos , Camundongos Transgênicos , Proteínas do Tecido Nervoso/genética , Proteínas do Tecido Nervoso/metabolismo , Alinhamento de Sequência , Análise de Sequência de DNA
5.
J Nat Prod ; 78(8): 1829-40, 2015 Aug 28.
Artigo em Inglês | MEDLINE | ID: mdl-26200131

RESUMO

The roots of Panax notoginseng, an important Chinese medicinal plant, have been used traditionally in both the raw and processed forms, due to the different chemical constituents and bioactivities found. Thirty-eight dammarane-type triterpenoid saponins were isolated from the steam-processed roots of P. notoginseng, including 18 new substances, namely, notoginsenosides SP1-SP18 (1-18). The structures of 1-18 were determined on the basis of spectroscopic analysis and acidic hydrolysis. The absolute configuration of the hydroxy group at C-24 in 1-4, 19, and 20 was determined in each case by Mo2(AcO)4-induced circular dichroism. The new compounds were found to feature a diversity of highly oxygenated side chains, formed by hydrolysis of the C-20 sugar moiety followed by dehydration, dehydrogenation, epoxidation, hydroxylation, or methoxylation of the main saponins in the raw roots. The new saponins 1, 2, 6-8, 14, and 17 and the known compounds 20-27 showed promoting effects on the differentiation of PC12 cells, at a concentration of 10 µM.


Assuntos
Medicamentos de Ervas Chinesas/isolamento & purificação , Medicamentos de Ervas Chinesas/farmacologia , Panax notoginseng/química , Plantas Medicinais/química , Saponinas/isolamento & purificação , Triterpenos/isolamento & purificação , Triterpenos/farmacologia , Animais , Diferenciação Celular/efeitos dos fármacos , Medicamentos de Ervas Chinesas/química , Estrutura Molecular , Ressonância Magnética Nuclear Biomolecular , Células PC12 , Raízes de Plantas/química , Ratos , Saponinas/química , Saponinas/farmacologia , Triterpenos/química , Damaranos
6.
J Asian Nat Prod Res ; 17(2): 125-31, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-25289696

RESUMO

Two new bibenzyl derivatives, dendrocandin T (1) and dendrocandin U (2), together with eight known bibenzyls, were isolated from the stems of Dendrobium officinale. Those compounds were sent for the first time for central nervous system-related bioassay and the results indicated that compounds 3, 4, and 5 have a certain degree of neurite outgrowth-promoting activity, and compounds 1, 2, 6, and 7 also have weak activity. The results indicated that D. officinale used as health food and traditional Chinese medicine "Tiepi Shihu" has a health function of neurotrophic effects.


Assuntos
Bibenzilas/isolamento & purificação , Bibenzilas/farmacologia , Dendrobium/química , Medicamentos de Ervas Chinesas/isolamento & purificação , Medicamentos de Ervas Chinesas/farmacologia , Neuritos/efeitos dos fármacos , Bibenzilas/química , Sistema Nervoso Central/efeitos dos fármacos , Medicamentos de Ervas Chinesas/química , Medicina Tradicional Chinesa , Estrutura Molecular , Ressonância Magnética Nuclear Biomolecular , Caules de Planta/química
7.
Chem Biodivers ; 11(9): 1406-16, 2014 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-25238081

RESUMO

Six new compounds, including two diterpenoids excocarinols F and G (1 and 2, resp.), two carotane (daucane) sesquiterpenoids excoecafolinols A and B (3 and 4, resp.), one lignanoid compound, excoecanol A (5), and one simple phenol, excoecanol B (6), together with 17 known compounds, were isolated from the BuOH extract of Excoecaria acerifolia Didr. stems. Their structures were elucidated through the analysis of the spectroscopic data. The AChE-inhibitory activities of 17 compounds were evaluated and revealed that four of them possessed moderate inhibitory activities against AChE.


Assuntos
Inibidores da Colinesterase/isolamento & purificação , Euphorbiaceae/química , Extratos Vegetais/isolamento & purificação , Caules de Planta/química , Inibidores da Colinesterase/química , Inibidores da Colinesterase/farmacologia , Espectroscopia de Ressonância Magnética , Estrutura Molecular , Extratos Vegetais/química , Extratos Vegetais/farmacologia , Espectrometria de Massas por Ionização por Electrospray , Espectrofotometria Ultravioleta
8.
Front Cell Infect Microbiol ; 14: 1358063, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38533380

RESUMO

Objective: Alcoholic liver disease (ALD) is a liver damage disease caused by long-term heavy drinking. Currently, there is no targeted pharmaceutical intervention available for the treatment of this disease. To address this, this paper evaluates the efficacy and safety of probiotic preparation in treating ALD through conducting a meta-analysis, and provides a valuable insight for clinical decision-making. Methods: A systematic search was conducted across databases, including PubMed, Embase, Web of Science, Cochrane Library, CNKI, VIP, Wanfang, and CBM from the inception dates to October 15, 2023, to identify clinical randomized controlled trials on probiotic preparations in the treatment of ALD. After the literature underwent screening, data extraction, and quality assessment, RevMan 5.3 and Stata 14.2 were employed for data analysis and processing. Results: A total of 9 randomized controlled trials fulfilled the inclusion criteria. The results of the meta-analysis showed that probiotic preparation could significantly improve the liver function of patients with alcoholic liver disease compared with the control group. Probiotic intervention led to a significant reduction in the levels of alanine aminotransferase (MD=-13.36,95%CI:-15.80,-10.91;P<0.00001),aspartate aminotransferase (MD=-16.99,95%CI:-20.38,-13.59;P<0.00001),γ-glutamyl transpeptidase (MD=-18.79,95% CI:-28.23,-9.34; P<0.0001). Concurrently, the level of serum albumin (MD=0.19,95% CI:0.02,0.36;P=0.03) was increased. Furthermore, probiotic intervention could also modulate the composition of intestinal flora in patients with alcoholic liver disease, leading to an augmentation in Bifidobacteria and a reduction in Escherichia coli. However, in patients with alcoholic liver disease, probiotic intervention showed no significant effects on total bilirubin (MD=-0.01,95% CI:-0.17,0.15;P=0.91), tumor necrosis factor-α (MD=0.03,95% CI:-0.86,0.92;P=0.94) and interleukin-6 (MD=-5.3,95% CI:-16.04,5.45;P=0.33). Conclusion: The meta-analysis indicates that probiotics can improve liver function in alcoholic liver disease, reduce inflammatory responses, regulate intestinal flora, which have potential value in the treatment of alcoholic liver disease. Systematic review registration: https://www.crd.york.ac.uk/prospero/, identifier CRD42023472527.


Assuntos
Hepatopatias Alcoólicas , Probióticos , Humanos , Probióticos/uso terapêutico , Resultado do Tratamento
9.
Front Pharmacol ; 15: 1384227, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38601465

RESUMO

Objective: In humans, aging is associated with increased susceptibility to most age-related diseases. Phloretic acid (PA), a naturally occurring compound found in Ginkgo biloba and Asparagus, exhibits has potential as an anti-aging agent and possesses antioxidant, anti-inflammatory, and immunomodulatory properties. This study aimed to investigate the effects of PA on longevity and stress resistance in Caenorhabditis elegans (C.elegans) and the mechanisms that underlie its effects. Methods: First, we examined the effects of PA on lifespan and healthspan assay, stress resistance and oxidative analysis, lipofuscin levels. Second, we examined the insulin/insulin-like pathway, mitochondria, autophagy-related proteins, and gene expression to explain the possible mechanism of PA prolonging lifespan. Results: Our findings demonstrated that PA dose-dependently extended the C.elegans lifespan, with 200 µM PA showing the greatest effect and increased the C.elegans lifespan by approximately 16.7%. PA enhanced motility and the pharyngeal pumping rate in senescent C.elegans while reducing the accumulation of aging pigments. Further investigations revealed that daf-16, skn-1, and hsf-1 were required for mediating the lifespan extension effect of PA in C.elegans since its impact was suppressed in mutant strains lacking these genes. This suggests that PA activates these genes, leading to the upregulation of downstream genes involved in stress response and senescence regulation pathways. Furthermore, PA did not extend the lifespan of the RNAi atg-18 and RNAi bec-1 but it attenuated SQST-1 accumulation, augmented autophagosome expression, upregulated autophagy-related gene expression, and downregulated S6K protein levels. These findings suggest that the potential life-extending effect of PA also involves the modulation of the autophagy pathway. Conclusion: These findings results highlight the promising anti-aging effects of PA and warrant further investigation into its pharmacological mechanism and medicinal development prospects.

10.
Bioorg Med Chem ; 21(14): 4218-24, 2013 Jul 15.
Artigo em Inglês | MEDLINE | ID: mdl-23719283

RESUMO

A series of novel 2-aminobenzimidazole derivatives were synthesized under microwave irradiation. Their biological activities were evaluated on acetylcholinesterase (AChE) and butyrylcholinesterase (BuChE). A number of the 2-aminobenzimidazole derivatives showed good inhibitory activities to AChE and BuChE. Among them, compounds 9, 12 and 13 were found to be >25-fold more selective for BuChE than AChE. No evidence of cytotoxicity was observed by MTT assay in PC12 cells or HepG2 cells exposed to 100µM of the compounds. Molecular modeling studies indicate that the benzimidazole moiety of compounds 9, 12 and 13 forms a face-to-face π-π stacking interaction in a 'sandwich' form with the indole ring of Trp82 (4.09Å) in the active gorge, and compounds 12 and 13 form a hydrogen bond with His438 at the catalytic site of BuChE. In addition, compounds 12 and 13 fit well into the hydrophobic pocket formed by Ala328, Trp430 and Tyr332 of BuChE. Our data suggest the 2-aminobenzimidazole drugs as promising new selective inhibitors for AChE and BuChE, potentially useful to treat neurodegenerative diseases.


Assuntos
Acetilcolinesterase/metabolismo , Benzimidazóis/síntese química , Benzimidazóis/farmacologia , Butirilcolinesterase/metabolismo , Inibidores da Colinesterase/síntese química , Inibidores da Colinesterase/farmacologia , Modelos Moleculares , Animais , Benzimidazóis/química , Sítios de Ligação , Domínio Catalítico , Inibidores da Colinesterase/química , Humanos , Ligação de Hidrogênio , Interações Hidrofóbicas e Hidrofílicas , Concentração Inibidora 50 , Ligação Proteica/efeitos dos fármacos , Ratos
11.
Planta Med ; 79(1): 87-91, 2013 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-23180341

RESUMO

One new compound named amauroamoienin (1), together with thirteen known compounds (2-14), was isolated from the EtOAc extract of Amauroderma amoiensis. The structures of these compounds were elucidated by the analysis of 1D and 2D spectroscopic data and the MS technique. The bioassays of inhibitory activities of these isolates against acetylcholinesterase were evaluated, and compounds 1, 3, and 5 exhibited acetylcholinesterase inhibitory activities.


Assuntos
Inibidores da Colinesterase/farmacologia , Compostos Heterocíclicos de 4 ou mais Anéis/farmacologia , Extratos Vegetais/farmacologia , Polyporales/química , Inibidores da Colinesterase/química , Inibidores da Colinesterase/isolamento & purificação , Eritrócitos/enzimologia , Compostos Heterocíclicos de 4 ou mais Anéis/química , Compostos Heterocíclicos de 4 ou mais Anéis/isolamento & purificação , Humanos , Técnicas In Vitro , Estrutura Molecular , Extratos Vegetais/química , Extratos Vegetais/isolamento & purificação
12.
Proc Natl Acad Sci U S A ; 107(33): 14887-92, 2010 Aug 17.
Artigo em Inglês | MEDLINE | ID: mdl-20679232

RESUMO

The Rem, Rem2, Rad, and Gem/Kir (RGK) family of small GTP-binding proteins potently inhibits high voltage-activated (HVA) Ca(2+) channels, providing a powerful means of modulating neural, endocrine, and muscle functions. The molecular mechanisms of this inhibition are controversial and remain largely unclear. RGK proteins associate directly with Ca(2+) channel beta subunits (Ca(v)beta), and this interaction is widely thought to be essential for their inhibitory action. In this study, we investigate the molecular underpinnings of Gem inhibition of P/Q-type Ca(2+) channels. We find that a purified Gem protein markedly and acutely suppresses P/Q channel activity in inside-out membrane patches, that this action requires Ca(v)beta but not the Gem/Ca(v)beta interaction, and that Gem coimmunoprecipitates with the P/Q channel alpha(1) subunit (Ca(v)alpha(1)) in a Ca(v)beta-independent manner. By constructing chimeras between P/Q channels and Gem-insensitive low voltage-activated T-type channels, we identify a region encompassing transmembrane segments S1, S2, and S3 in the second homologous repeat of Ca(v)alpha(1) critical for Gem inhibition. Exchanging this region between P/Q and T channel Ca(v)alpha(1) abolishes Gem inhibition of P/Q channels and confers Ca(v)beta-dependent Gem inhibition to a chimeric T channel that also carries the P/Q I-II loop (a cytoplasmic region of Ca(v)alpha(1) that binds Ca(v)beta). Our results challenge the prevailing view regarding the role of Ca(v)beta in RGK inhibition of high voltage-activated Ca(2+) channels and prompt a paradigm in which Gem directly binds and inhibits Ca(v)beta-primed Ca(v)alpha(1) on the plasma membrane.


Assuntos
Canais de Cálcio Tipo P/fisiologia , Canais de Cálcio Tipo Q/fisiologia , Membrana Celular/efeitos dos fármacos , Proteínas Monoméricas de Ligação ao GTP/farmacologia , Sequência de Aminoácidos , Animais , Western Blotting , Canais de Cálcio Tipo P/genética , Canais de Cálcio Tipo P/metabolismo , Canais de Cálcio Tipo Q/genética , Canais de Cálcio Tipo Q/metabolismo , Linhagem Celular , Membrana Celular/fisiologia , Feminino , Humanos , Imunoprecipitação , Cinética , Potenciais da Membrana/efeitos dos fármacos , Modelos Biológicos , Dados de Sequência Molecular , Proteínas Monoméricas de Ligação ao GTP/genética , Proteínas Monoméricas de Ligação ao GTP/metabolismo , Oócitos/efeitos dos fármacos , Oócitos/metabolismo , Oócitos/fisiologia , Ligação Proteica , Subunidades Proteicas/genética , Subunidades Proteicas/metabolismo , Subunidades Proteicas/fisiologia , Homologia de Sequência de Aminoácidos , Xenopus laevis
13.
Chem Biodivers ; 10(6): 1061-71, 2013 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-23776021

RESUMO

Four highly acylated diterpenoids, designated as pierisformotoxins A-D (1-4, resp.), along with 26 known compounds, were isolated from the flowers of Pieris formosa. Among them, pierisformotoxins A and B (1 and 2, resp.) were new highly acylated grayanane diterpenoids, of which the five-membered ring A has undergone an oxidative cleavage between C(3) and C(4), followed by lactonization, to give rise to a five-membered lactone ring between C(3) and C(5), differing from the previously reported grayanane diterpenoids with a 5/7/6/5 ring system. Results of the cAMP-regulation-activity assay showed that pierisformotoxin C (3) at 10 µM (inhibitory ratio (IR): 10.1%) or 2 µM (9.8%), and pierisformotoxin B (2) at 50 µM (13.9%) significantly decreased the cAMP level in N1E-115 neuroblastoma cells (p<0.05).


Assuntos
Diterpenos/química , Ericaceae/química , Animais , Linhagem Celular Tumoral , AMP Cíclico/metabolismo , Diterpenos/isolamento & purificação , Diterpenos/farmacologia , Flores/química , Espectroscopia de Ressonância Magnética , Camundongos , Conformação Molecular , Neurônios/efeitos dos fármacos
14.
Exp Gerontol ; 175: 112145, 2023 05.
Artigo em Inglês | MEDLINE | ID: mdl-36921677

RESUMO

D-chiro-inositol (DCI) is an isomer of inositol, abundant in many foods, such as beans and buckwheat, with insulin-sensitizing, anti-inflammatory, and antioxidant effects. DCI has been used to relieve insulin resistance in diabetes and polycystic ovary syndrome in combination with inositol or D-pinitol. Here, we investigated the effect of DCI on aging and stress resistance in C. elegans. We found that DCI could prolong the lifespan of C. elegans by up to 29.6 %. DCI significantly delayed the onset of neurodegenerative diseases in models of C. elegans. DCI decreased the accumulation of Aß1-42, alpha-synuclein, and poly-glutamine, the pathological causes of Alzheimer's, Parkinson's, and Huntington's diseases, respectively. DCI significantly increased the stress resistances against pathogens, oxidants and heat shock. Moreover, D-chiro-inositol reduced the content of ROS and malondialdehyde by increasing the total antioxidant capacity and the activity of superoxide dismutase and catalase. Above effects of DCI requires the transcription factors FOXO/DAF-16 and Nrf-2/SKN-1. DCI also increased the expression of downstream genes regulated by FOXO/DAF-16 and Nrf-2/SKN-1. In conclusion, DCI enhanced the antioxidant capacity and healthy lifespan of C. elegans by activating DAF-16, SKN-1, and HSF-1. Our results showed that DCI could be a promising antiaging agent that is worth further research on the mechanism and health supplemental application of DCI.


Assuntos
Proteínas de Caenorhabditis elegans , Caenorhabditis elegans , Animais , Antioxidantes/farmacologia , Antioxidantes/metabolismo , Longevidade , Proteínas de Caenorhabditis elegans/genética , Estresse Oxidativo , Transdução de Sinais , Fatores de Transcrição Forkhead/metabolismo , Proteínas de Ligação a DNA/genética , Fatores de Transcrição/metabolismo
15.
Comput Biol Med ; 163: 107130, 2023 09.
Artigo em Inglês | MEDLINE | ID: mdl-37329614

RESUMO

AIM: To obtain the coronary artery calcium score (CACS) for each branch in coronary artery computed tomography angiography (CCTA) examination combined with the flow fraction reserve (FFR) of each branch in the coronary artery detected by CT and apply a machine learning model (ML) to analyse and predict the severity of coronary artery stenosis. METHODS: All patients who underwent coronary computed tomography angiography (CCTA) from January 2019 to April 2022 in the HOSPITAL (T.C.M) AFFILIATED TO SOUTHWEST MEDICAL UNIVERSITY) were retrospectively screened, and their sex, age, characteristics of lipid-containing lesions, coronary calcium score (CACS) and CT-FFR values were collected. Five machine learning models, random forest (RF), k-nearest neighbour algorithm (KNN), kernel logistic regression, support vector machine (SVM) and radial basis function neural network (RBFNN), were used as predictive models to evaluate the severity of coronary stenosis. RESULTS: Among the five machine learning models, the SVM model achieved the best prediction performance, and the prediction accuracy of mild stenosis was up to 90%. Second, age and male sex were important influencing factors of increasing CACS and decreasing CT-FFR. Moreover, the critical CACS value of myocardial ischemia >200.70 was calculated. CONCLUSION: Through computer machine learning model analysis, we prove the importance of CACS and FFR in predicting coronary stenosis, especially the prominent vector machine model, which promotes the application of artificial intelligence computer learning methods in the field of medical analysis.


Assuntos
Calcinose , Doença da Artéria Coronariana , Estenose Coronária , Humanos , Masculino , Estudos Retrospectivos , Inteligência Artificial , Cálcio , Estenose Coronária/diagnóstico por imagem , Doença da Artéria Coronariana/diagnóstico por imagem , Angiografia Coronária/métodos , Aprendizado de Máquina , Valor Preditivo dos Testes
16.
J Nat Prod ; 75(6): 1025-9, 2012 Jun 22.
Artigo em Inglês | MEDLINE | ID: mdl-22620677

RESUMO

Diincarvilones A-D (1-4), incarvilone A (5), and a known compound, argutosine B (6), were isolated from Incarvillea arguta. The structures, including the absolute configurations of the new compounds, were determined by NMR spectroscopy, X-ray diffraction analysis, CD spectroscopy, and a variety of computational methods. The biological properties of these substances, including effects on intracellular Ca(2+) influx, nitric oxide (NO) production, and human cancer cells, were evaluated. The results showed that at the concentration of 10 µM (in HBSS buffer) diincarvilones A and B cause a persistent increase in cytoplasmic calcium levels in A549 cells.


Assuntos
Bignoniaceae/química , Medicamentos de Ervas Chinesas/isolamento & purificação , Medicamentos de Ervas Chinesas/farmacologia , Sesquiterpenos/isolamento & purificação , Sesquiterpenos/farmacologia , Cálcio/análise , Cálcio/metabolismo , Cristalografia por Raios X , Medicamentos de Ervas Chinesas/química , Humanos , Conformação Molecular , Estrutura Molecular , Óxido Nítrico , Ressonância Magnética Nuclear Biomolecular , Sesquiterpenos/química
17.
Planta Med ; 78(4): 368-76, 2012 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-22161763

RESUMO

A new pentanorlanostane, ganosineniol A (1), eight new lanostane triterpenoids, ganosinoside A (2), ganoderic acid Jc (3), ganoderic acid Jd (4), ganodermatetraol (5), ganolucidic acid γa (6), ganolucidate F (7), ganoderiol J ( 8), and methyl lucidenate Ha ( 9), and a new sesquiterpenoid, ganosinensine (10), together with eleven known triterpenoids (11- 21), were isolated from the fruiting bodies of the fungus Ganoderma sinense. Chemical structures were determined based on spectroscopic evidence, including 1D, 2D NMR, and mass spectral data. Furthermore, all isolates were tested for cytotoxic activity and induction ability of hPXR-mediated CYP3A4 expression. Among them, ganoderic acid Jc (3) displayed selective inhibitory activity against HL-60 cells (IC50 = 8.30 µM), and ganoderiol E (11) exhibited selective cytotoxic activity against MCF-7 cells (IC50 = 6.35 µM). Meanwhile, compounds 5, 7, and ganolucidic acids B and C (19, 20) showed induction ability of hPXR-mediated CYP3A4 expression.


Assuntos
Ganoderma/química , Terpenos/isolamento & purificação , Terpenos/farmacologia , Triterpenos/farmacologia , Antineoplásicos Fitogênicos/farmacologia , Linhagem Celular Tumoral , Ensaios de Seleção de Medicamentos Antitumorais , Humanos , Estrutura Molecular , Extratos Vegetais/farmacologia , Plantas Medicinais/química
18.
Oxid Med Cell Longev ; 2022: 8878923, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35237385

RESUMO

Age is the major risk factor for most of the deadliest diseases. Developing small molecule drugs with antiaging effects could improve the health of aged people and retard the onset and progress of aging-associated disorders. Bioactive secondary metabolites from medicinal plants are the main source for development of medication. Orientin is a water-soluble flavonoid monomer compound widely found in many medicinal plants. Orientin inhibits fat production, antioxidation, and anti-inflammatory activities. In this study, we explored whether orientin could affect the aging of C. elegans. We found that orientin improved heat, oxidative, and pathogenic stress resistances through activating stress responses, including HSF-1-mediated heat shock response, SKN-1-mediated xenobiotic and oxidation response, mitochondria unfolded responses, endoplasmic unfolded protein response, and increased autophagy activity. Orientin also could activate key regulators of the nutrient sensing pathway, including AMPK and insulin downstream transcription factor FOXO/DAF-16 to further improve the cellular health status. The above effects of orientin reduced the accumulation of toxic proteins (α-synuclein, ß-amyloid, and poly-Q) and delayed the onset of neurodegenerative disorders in AD, PD, and HD models of C. elegans and finally increased the longevity and health span of C. elegans. Our results suggest that orientin has promising antiaging effects and could be a potential natural source for developing novel therapeutic drugs for aging and its related diseases.


Assuntos
Proteínas Quinases Ativadas por AMP/metabolismo , Antioxidantes/farmacologia , Proteínas de Caenorhabditis elegans/metabolismo , Caenorhabditis elegans/efeitos dos fármacos , Caenorhabditis elegans/metabolismo , Flavonoides/farmacologia , Fatores de Transcrição Forkhead/metabolismo , Glucosídeos/farmacologia , Longevidade/efeitos dos fármacos , Doenças Neurodegenerativas/prevenção & controle , Compostos Fitoquímicos/farmacologia , Extratos Vegetais/farmacologia , Transdução de Sinais/efeitos dos fármacos , Animais , Autofagia/efeitos dos fármacos , Proteínas de Ligação a DNA/metabolismo , Modelos Animais de Doenças , Estresse Oxidativo/efeitos dos fármacos , Plantas Medicinais/química , Fatores de Transcrição/metabolismo , Resposta a Proteínas não Dobradas/efeitos dos fármacos
19.
Front Pharmacol ; 13: 931886, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-36071837

RESUMO

Aging is associated with the increased risk of most age-related diseases in humans. Complanatoside A (CA) is a flavonoid compound isolated from the herbal medicine Semen Astragali Complanati. CA was reported to have potential anti-inflammatory and anti-oxidative activities. In this study, we investigated whether CA could increase the stress resistance capability and life span of Caenorhabditis elegans. Our results showed that CA could extend the longevity of C. elegans in a dosage-dependent manner, while 50 µM of CA has the best effect and increased the life span of C. elegans by about 16.87%. CA also improved the physiological functions in aging worms, such as enhanced locomotor capacity, and reduced the accumulation of the aging pigment. CA could also reduce the accumulation of toxic proteins (α-synuclein and ß-amyloid) and delay the onset of neurodegenerative disorders, such as Alzheimer's disease and Parkinson's disease, in models of C. elegans. Further investigation has revealed that CA requires DAF-16/FOXO, SKN-1, and HSF-1 to extend the life span of C. elegans. CA could increase the antioxidation and detoxification activities regulated by transcription factor SKN-1 and the heat resistance by activating HSF-1 that mediated the expression of the chaperone heat shock proteins. Our results suggest that CA is a potential antiaging agent worth further research for its pharmacological mechanism and development for pharmaceutical applications.

20.
Oxid Med Cell Longev ; 2022: 8986287, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35401930

RESUMO

The traditional Chinese medicine Gastrodia elata (commonly called "Tianma" in Chinese) has been widely used in the treatment of rheumatism, epilepsy, paralysis, headache, and dizziness. Phenolic compounds, such as gastrodin, para-hydroxybenzyl alcohol (HBA), p-hydroxybenzaldehyde, and vanillin are the main bioactive components isolated from Gastrodia elata. These compounds not only are structurally related but also share similar pharmacological activities, such as antioxidative and anti-inflammatory activities, and effects on the treatment of aging-related diseases. Here, we investigated the effect of para-hydroxybenzyl alcohol (HBA) on neurodegenerative diseases and aging in models of Caenorhabditis elegans (C. elegans). Our results showed that HBA effectively delayed the progression of neurodegenerative diseases, such as Alzheimer's disease, Parkinson's disease, and Huntington's disease in models of C. elegans. In addition, HBA could increase the average lifespan of N2 worms by more than 25% and significantly improve the age-related physiological functions of worms. Moreover, HBA improved the survival rate of worms under stresses of oxidation, heat, and pathogenic bacteria. Further mechanistic investigation revealed that HBA could activate FOXO/DAF-16 and SKN-1 to regulate antioxidative and xenobiotic metabolism pathway. HBA could also activate HSF-1 to regulate proteostasis maintenance pathway, mitochondrial unfolded stress response, endoplasmic stress response and autophagy pathways. The above results suggest that HBA activated multiple cellular protective pathways to increase stress resistance and protect against aging and aging-related diseases. Overall, our study indicates that HBA is a potential candidate for future development of antiaging pharmaceutical application.


Assuntos
Proteínas de Caenorhabditis elegans , Gastrodia , Doenças Neurodegenerativas , Animais , Antioxidantes/farmacologia , Caenorhabditis elegans , Proteínas de Caenorhabditis elegans/metabolismo , Gastrodia/metabolismo , Longevidade , Doenças Neurodegenerativas/tratamento farmacológico
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