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1.
Pestic Biochem Physiol ; 195: 105557, 2023 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-37666618

RESUMO

The diamondback moth (Plutella xylostella) is one of the most destructive lepidopteran pests of cruciferous vegetables. However, DBM has developed resistance to current chemical and biological insecticides used for its control, indicating the necessity for finding new insecticides against it. Bio-insecticides derived from plant extracts are eco-friendly alternatives to synthetic pesticides. The aims of this study were to evaluate the insecticidal activity of Consolida ajacis seed extracts against DBM, the underlying mechanism of the control effect of promising extracts, and the identification of the main insecticidal compounds of these extracts. The results showed that ethyl acetate extract of C. ajacis seed exhibited strong contact toxicity (LC50: 5.05 mg/mL), ingestion toxicity, antifeedant, and oviposition deterrent activities against DBM, among the extracts evaluated. At 72 h, glutathiase, acetylcholinesterase, carboxylesterase, peroxidase, and superoxide dismutase activities were inhibited, but catalase activity was activated. The main compound identified from the extract was ethyl linoleate, which had the most significant insecticidal activity on the diamondback moths. This study's findings provide a better understanding of the insecticidal activity of ethyl acetate extract obtained from C. ajacis and its main component (ethyl linoleate). This will help in the development of new insecticides to control DBM.


Assuntos
Inseticidas , Mariposas , Ranunculaceae , Feminino , Animais , Inseticidas/farmacologia , Acetilcolinesterase
2.
Front Med (Lausanne) ; 10: 1113408, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37215710

RESUMO

Objectives: This study aimed to assess the effectiveness of iguratimod (IGU) as an alternative treatment for systemic sclerosis (SSc), especially in the prevention of ischemic digital ulcers (DUs). Methods: We constructed two cohorts from the Renji SSc registry. In the first cohort, SSc patients receiving IGU were observed prospectively with effectiveness and safety. In the second cohort, we picked up all the DU patients with at least a 3-month follow-up to investigate the prevention of IGU on ischemic DU. Results: From 2017 to 2021, 182 SSc patients were enrolled in our SSc registry. A total of 23 patients received IGU. With a median follow-up of 61 weeks (IQR: 15-82 weeks), the drug persistence was 13/23. In total, 91.3% of the patients (21/23) became free of deterioration in the last visit with IGU. Of note, 10 patients withdrew from the study due to the following reasons: two patients withdrew due to deterioration, three due to incompliance, and five due to mild-to-moderate side effects. All the patients with side effects recovered fully after stopping IGU. Of note, 11 patients had ischemic DU, and 8 out of 11 (72.7%) patients had no new occurrence of DU during the follow-up. In the second cohort of 31 DU patients receiving a combination of vasoactive agents with a median follow-up of 47 weeks (IQR, 16-107 weeks), IGU treatment was protective of new DU occurrence (adjusted risk ratio = 0.25; 95% CI, 0.05-0.94; adjusted odds ratio = 0.07; and 95% CI, 0.01-0.49). Conclusion: Our study for the first time describes the potential of IGU possibly as an alternative treatment for SSc. To our surprise, this study provides a hint that IGU treatment can be used for the prevention of the occurrence of ischemic DU and merits further investigation.

3.
Plant Physiol Biochem ; 197: 107643, 2023 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-36989989

RESUMO

Rhamnosyltransferase (RT) and rhamnose synthase (Rhs) are the key enzymes that are responsible for the biosynthesis of rhamnosides and UDP-l-rhamnose (UDP-Rha) in plants, respectively. How to discover such enzymes efficiently for use is still a problem to be solved. Here, we identified HmF3RT, HmRhs1, and HmRhs2 from Hypericum monogynum, which is abundant in flavonol rhamnosides, with the help of a full-length and high throughput transcriptome sequencing platform. HmF3RT could regiospecifically transfer the rhamnose moiety of UDP-Rha onto the 3-OH position of flavonols and has weakly catalytic for UDP-xylose (UDP-Xyl) and UDP-glucose (UDP-Glc). HmF3RT showed well quercetin substrate affinity and high catalytic efficiency with Km of 5.14 µM and kcat/Km of 2.21 × 105 S-1 M-1, respectively. Docking, dynamic simulation, and mutagenesis studies revealed that V129, D372, and N373 are critical residues for the activity and sugar donor recognition of HmF3RT, mutant V129A, and V129T greatly enhance the conversion rate of catalytic flavonol glucosides. HmRhs1 and HmRhs2 convert UDP-Glc to UDP-Rha, which could be further used by HmF3RT. The HmF3RT and HmRhs1 co-expressed strain RTS1 could produce quercetin 3-O-rhamnoside (quercitrin), kaempferol 3-O-rhamnoside (afzelin), and myricetin 3-O-rhamnoside (myricitrin) at yields of 85.1, 110.7, and 77.6 mg L-1, respectively. It would provide a valuable reference for establishing a better and more efficient biocatalyst for preparing bioactive flavonol rhamnosides by identifying HmF3RT and HmRhs.


Assuntos
Hypericum , Transferases , Flavonóis/metabolismo , Hypericum/enzimologia , Ramnose/metabolismo , Açúcares de Uridina Difosfato/metabolismo , Transferases/química , Transferases/metabolismo
4.
Fitoterapia ; 166: 105462, 2023 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-36828117

RESUMO

Seven rare noreudesmane sesquiterpenoids (dysoxydenones M-S, 1-7), including three 11,12,13-trinoreudesmanes, three 13-noreudesmanes and one spirovetivane-type sesquiterpenoid, along with two known analogues were isolated from the fruits of Dysoxylum densiflorum. The planar structures were elucidated by a combination of 1D, 2D NMR and HRESIMS analyses. Their absolute configurations were determined by combination of single-crystal X-ray diffraction, CD exciton chirality method and ECD calculation. All compounds were screened for anti-inflammatory activity on LPS-induced RAW 264.7 cells and IL-1ß inhibitory activity.


Assuntos
Meliaceae , Sesquiterpenos , Estrutura Molecular , Frutas , Cristalografia por Raios X , Sesquiterpenos/farmacologia , Sesquiterpenos/química
5.
Front Biosci (Landmark Ed) ; 27(11): 307, 2022 11 15.
Artigo em Inglês | MEDLINE | ID: mdl-36472105

RESUMO

BACKGROUND: Systemic lupus erythematosus (SLE) is a chronic multisystem autoimmune disorder affecting almost any organ system without effective treatment. Based on accumulating evidence, activated T cells are key cause promoting the pathogenesis of SLE. A traditional clinic Langchuangding formula (LCD) is an effective clinical traditional Chinese medicine prescription for SLE with few side effects and good patient compliance. However, the mechanism of how LCD affects SLE remains unclear. METHODS: Targets related to LCD and SLE were predicted and overlapped to construct protein-protein interaction (PPI) for screening core target. Subsequently, flow cytometry analysis and Western-blot method were used to verify the expression levels of target gene in LCD serum treated-Jurkat T cells. The main compounds of LCD were identified by HPLC-MS and further docked with the core targe. RESULTS: 283 protein targets in LCD, 1498 SLE targets and 150 common targets were obtained to construct protein-protein interaction (PPI). Network pharmacology results suggested that LCD was closely related to CASP3 target. To verify the prediction of pharmacological mechanism of LCD treatment for SLE, we investigated the anti-proliferative effects of LCD-treated rat serum on ß-oestradiol (300 pg/mL)-activated Jurkat T cells in vitro using a CCK-8 kit and flow cytometry analysis and then analyzed the CASP3 expression levels. Vitro experiments confirmed that LCD serum could suppress the proliferation (p < 0.05) and induce apoptosis of the activated T cells through up-regulating CASP3 expression levels. Interactions between CASP3 target and LCD were further validated integrating HPLC-MS analysis and molecular docking. CONCLUSIONS: The results showed that LCD could relieve SLE, which might be attributed to inducing the activated T cells apoptosis by up-regulating CASP3 expression levels. The network pharmacology and molecular docking approach provide a new insight for deepening understanding about TCM. LCD potentially represents a promising therapeutic prescription for SLE supplement treatment with no adverse effects.


Assuntos
Lúpus Eritematoso Sistêmico , Farmacologia em Rede , Animais , Ratos , Cromatografia Líquida de Alta Pressão , Simulação de Acoplamento Molecular , Caspase 3 , Prescrições , Lúpus Eritematoso Sistêmico/tratamento farmacológico
6.
Biomaterials ; 291: 121916, 2022 12.
Artigo em Inglês | MEDLINE | ID: mdl-36410110

RESUMO

Cancer treatment currently still faces crucial challenges in therapeutic effectiveness, precision, and complexity. Photodynamic therapy (PDT) as a non-invasive tactic has earned widespread popularity for its excellent therapeutic output, flexibility, and restrained toxicity. Nonetheless, drawbacks, including low efficiency, poor cancer specificity, and limited therapeutic depth, remain considerable during the cancer treatment. Although great effort has been made to improve the performance, the overall efficiency and biosafety are still ambiguous and unable to meet urgent clinical needs. Herein, this study integrates merits from previous PDT strategies and develops a cancer-targeting, activatable, biosafe photosensitizer. Owing to excellent self-assembly ability, this photosensitizer can be conveniently prepared as multifunctional nano-photosensitizers, namely MBNPs, and applied to in vivo cancer phototheranostics in "all-in-one" mode. This study successfully verifies the mechanism of MBNPs, then deploys them to cell-based and in vivo cancer PDT. Based on the unique cancer microenvironment, MBNPs achieve precise distribution, accumulation, and activation towards the tumor, releasing methylene blue as a potent photosensitizer for phototherapy. The PDT outcome demonstrates MBNPs' superior cancer specificity, remarkable PDT efficacy, and negligible toxicity. Meanwhile, in vivo NIR fluorescence and photoacoustic imaging have been utilized to guide the PDT treatment synergistically. Additionally, the biosafety of the MBNPs-based PDT treatment is ensured, thus providing potential for future clinical studies.


Assuntos
Neoplasias , Fotoquimioterapia , Humanos , Fármacos Fotossensibilizantes/uso terapêutico , Contenção de Riscos Biológicos , Neoplasias/tratamento farmacológico , Microambiente Tumoral
7.
ACS Appl Mater Interfaces ; 14(45): 50557-50568, 2022 Nov 16.
Artigo em Inglês | MEDLINE | ID: mdl-36322879

RESUMO

Single ionizing radiation at a tolerable dose is ineffectual in eliminating malignancies but readily generates harmful effects on surrounding normal tissues. Herein, we intelligently fabricated novel wolfram-doped polypyrrole (WPPy) through a simple oxidative polymerization method with WCl6 as an oxidizing catalyst, which possessed good biocompatibility, high photothermal conversion, and intensive radiosensitivity capacities to concurrently serve as a photothermal reagent and a radiosensitizer for hyperthermia-synergized radiotherapy (RT) against a malignant tumor. In comparison with traditional polypyrrole without noble metal doping, the innovative introduction of WCl6 not only successfully launched the polymerization of a pyrrole monomer but also endowed WPPy with additional radiosensitization. More importantly, after further decoration with an active targeted component (SP94 polypeptide), the obtained WPPy@SP94 significantly increased tumor internalization and accumulation in vitro and in vivo and induced obvious DNA damage as well as robust ROS generation under X-ray irradiation, which meanwhile synergized with strong photonic hyperthermia to effectively inhibit tumor growth by single drug injection. Moreover, such biocompatible WPPy@SP94 showed negligible adverse effects on normal cells and tissues. WPPy@SP94 developed in this study not only expands the category of polypyrrole chemical syntheses but also sheds light on WPPy@SP94-based radiosensitizers for cancer RT.


Assuntos
Hipertermia Induzida , Neoplasias , Radiossensibilizantes , Humanos , Polímeros , Pirróis , Tungstênio , Neoplasias/radioterapia , Radiossensibilizantes/farmacologia , Hipertermia , Linhagem Celular Tumoral
8.
Fitoterapia ; 163: 105347, 2022 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-36336137

RESUMO

Two novel series of 1,2-didehydro-7-hydroxy-3-ox-14-deoxyandrographolide and 1,2-didehydro-8,17-epoxy-3-ox-14-deoxyandrographolide derivatives were designed, synthesized and evaluated for their cytotoxic activity in vitro against two human cancer cell lines HCT-116 (human colon cancer) and MCF-7 (human breast cancer). Most tested compounds, especially those of the first series, displayed better inhibitory activity on both HCT-116 and MCF-7 cells than andrographolide. HCT-116 cells were found to be more sensitive to tested compounds than MCF-7, and compound 13b exhibited the most potent activity against HCT-116, with an IC50 value of 7.32 µM. Further anti-cancer mechanistic investigation demonstrated that compound 13b effectively suppressed the growth of HCT-116 cells by triggering early and late cellular apoptosis in a concentration-dependent manner and arresting cell cycle in S phase.


Assuntos
Antineoplásicos , Oxigênio , Humanos , Ensaios de Seleção de Medicamentos Antitumorais , Relação Estrutura-Atividade , Estrutura Molecular , Relação Dose-Resposta a Droga , Antineoplásicos/farmacologia , Apoptose , Proliferação de Células , Linhagem Celular Tumoral , Desenho de Fármacos
9.
Pharmacol Res ; 185: 106489, 2022 11.
Artigo em Inglês | MEDLINE | ID: mdl-36228869

RESUMO

Alzheimer's disease (AD) is a neurodegenerative disorder characterized by progressive cognitive decline and currently there are no available treatments. Alongside the conventional Aß and tau hypotheses, neuroinflammation and metabolism disruption have also been regarded as crucial hallmarks of AD. In this study, a novel Chinese formula Nao Tan Qing (NTQ) was developed and shown to improve AD. In vivo experiments showed that NTQ significantly mitigated cognitive impairment, Aß burden and neuroinflammation in a transgenic AD mouse model (5×FAD). Network pharmacology results revealed that the active components of NTQ could target inflammatory and metabolic pathways. In addition, hippocampal transcriptomics suggested that NTQ regulated signaling pathways related to inflammation and lipid metabolism. Consistently, serum metabolomics further indicated that NTQ could modulate glycolipid metabolism. In summary, a combination of systems pharmacology analysis and biological validation study demonstrates that NTQ could alleviate behavioral abnormality and pathological alterations of AD by targeting glycolipid metabolism and neuroinflammation, and is accordingly a potential therapeutic agent for AD.


Assuntos
Doença de Alzheimer , Animais , Camundongos , Doença de Alzheimer/metabolismo , Doenças Neuroinflamatórias , Farmacologia em Rede , Camundongos Transgênicos , Modelos Animais de Doenças , Metabolismo dos Lipídeos , Glicolipídeos/uso terapêutico , Peptídeos beta-Amiloides/metabolismo
10.
Chem Commun (Camb) ; 58(45): 6546-6549, 2022 Jun 01.
Artigo em Inglês | MEDLINE | ID: mdl-35579558

RESUMO

Novel NIR-II Ru(II) polypyridyl fluorophore Ru-1 dots for synergistic chemo-photothermal therapy against 4T1 tumors were designed and synthesized. Guided by in vivo NIR-II fluorescence imaging, the synergistic therapeutic efficacy, intracellular delivery, and biodistribution of the Ru-1 dots were precisely tracked in real-time.


Assuntos
Nanopartículas , Rutênio , Linhagem Celular Tumoral , Corantes Fluorescentes , Fototerapia/métodos , Terapia Fototérmica , Distribuição Tecidual
11.
Sci Total Environ ; 827: 154318, 2022 Jun 25.
Artigo em Inglês | MEDLINE | ID: mdl-35257751

RESUMO

Volatile organic compounds (VOCs) are toxic to the ecological environment. The emission of VOCs into the atmosphere has already caused attention. However, few studies focus on their regional effects on soil. As a major VOCs source in China, research on the effect of petrochemical industry on the environment is urgent and essential for regional control and industrial layout. This study established national VOCs emission inventory of five petrochemical sub-industries and spatial distribution based on consumption of raw material or products' yield and 28,888 factories. The VOCs emissions showed continuously increasing trend from 2008 to 2019, with cumulative 1.83 × 107 t, wherein these from rapid economic development zones accounted for 66.10%. The detected concentrations of VOCs in various industries combined with meteorological parameters were used in Resistance Model to quantify regional dry deposition. Higher concentrations of 111 VOC species were 238.27, 260.01, 207.54 µg·m-3 from large-scale enterprises for crude oil and natural gas extraction, oil processing, synthetic rubber and resin, leading to higher deposition ratios of 0.81%-0.94%, 0.70%-0.81%, 1.50%-1.75% in rapid economic development zones, respectively. The regional climate condition played a dominant role. Annual VOCs dry deposition amount in rapid economic development zones was calculated to be totally 6.38 × 103 t using obtained deposition ratios and emissions, with 3.21 × 103 t in Bohai Economic Rim (BER), 2.42 × 103 t in Yangtze River Economic Belt (YREB), 748.43 t in Pearl River Delta (PRD). Generally, crude oil and natural gas extraction, oil processing, synthetic rubber and resin contributed 13.09%, 57.77% and 29.14%, respectively. The proportion of synthetic rubber and resin for dry deposition increased by 5.04%-18.81% compared with VOCs emissions in BER and YREB. In contrast, it declined from 45.52% for emission to 29.86% for deposition due to absolute dominance of small-scale enterprises in PRD. Overall, VOCs control from oil processing was significant, especially in BER.


Assuntos
Poluentes Atmosféricos , Petróleo , Compostos Orgânicos Voláteis , Poluentes Atmosféricos/análise , China , Elastômeros , Monitoramento Ambiental , Gás Natural , Solo , Compostos Orgânicos Voláteis/análise
12.
Drug Deliv ; 29(1): 624-636, 2022 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-35174748

RESUMO

Chemodynamic therapy (CDT) by triggering Fenton reaction or Fenton-like reaction to generate hazardous hydroxyl radical (•OH), is a promising strategy to selectively inhibit tumors with higher H2O2 levels and relatively acidic microenvironment. Current Fe-based Fenton nanocatalysts mostly depend on slowly releasing iron ions from Fe or Fe oxide-based nanoparticles, which leads to a limited rate of Fenton reaction. Herein, we employed black phosphorene nanosheets (BPNS), a biocompatible and biodegradable photothermal material, to develop iron-mineralized black phosphorene nanosheet (BPFe) by in situ deposition method for chemodynamic and photothermal combination cancer therapy. This study demonstrated that the BPFe could selectively increase cytotoxic ·OH in tumor cells whereas having no influence on normal cells. The IC50 of BPFe for tested tumor cells was about 3-6 µg/mL, which was at least one order of magnitude lower than previous Fe-based Fenton nanocatalysts. The low H2O2 level in normal mammalian cells guaranteed the rare cytotoxicity of BPFe. Moreover, the combination of photothermal therapy (PTT) with CDT based on BPFe was proved to kill tumors more potently with spatiotemporal accuracy, which exhibited excellent anti-tumor effects in xenografted MCF-7 tumor mice models.


Assuntos
Antineoplásicos/farmacologia , Doxorrubicina/farmacologia , Nanoestruturas/química , Neoplasias/patologia , Terapia Fototérmica/métodos , Animais , Antineoplásicos/administração & dosagem , Linhagem Celular Tumoral , Química Farmacêutica , Relação Dose-Resposta a Droga , Doxorrubicina/administração & dosagem , Portadores de Fármacos/química , Humanos , Peróxido de Hidrogênio/metabolismo , Concentração Inibidora 50 , Ferro/química , Camundongos , Fósforo/química , Distribuição Aleatória , Ensaios Antitumorais Modelo de Xenoenxerto
13.
J Med Chem ; 65(3): 2225-2237, 2022 02 10.
Artigo em Inglês | MEDLINE | ID: mdl-34994554

RESUMO

The clinical success of cisplatin ushered in a new era of the application of metallodrugs. When it comes to practice, however, drug resistance, tumor recurrence, and drug systemic toxicity make it implausible to completely heal the patients. Herein, we successfully transform an electron acceptor [1, 2, 5]thiadiazolo[3,4-g]quinoxaline into a novel second near-infrared (NIR-II) fluorophore H7. After PEGylation and chelation, HL-PEG2k exhibits a wavelength bathochromic shift, enhanced photothermal conversion efficiency (41.77%), and an antineoplastic effect against glioma. Its potential for in vivo tumor tracking and image-guided chemo-photothermal therapy is explored. High levels of uptake and high-resolution NIR-II imaging results are thereafter obtained. The hyperthermia effect could disrupt the lysosomal membranes, which in turn aggravate the mitochondria dysfunction, arrest the cell cycle in the G2 phase, and finally lead to cancer cell apoptosis. HL-PEG2k displays a superior biocompatibility and thus can be a potential theranostic platform to combat the growth and recurrence of tumors.


Assuntos
Complexos de Coordenação/química , Raios Infravermelhos , Rutênio/química , Apoptose/efeitos dos fármacos , Materiais Biocompatíveis/química , Materiais Biocompatíveis/farmacologia , Materiais Biocompatíveis/uso terapêutico , Linhagem Celular Tumoral , Complexos de Coordenação/farmacologia , Complexos de Coordenação/uso terapêutico , Desenho de Fármacos , Corantes Fluorescentes/química , Corantes Fluorescentes/farmacologia , Corantes Fluorescentes/uso terapêutico , Pontos de Checagem da Fase G2 do Ciclo Celular/efeitos dos fármacos , Humanos , Hipertermia Induzida , Neoplasias/diagnóstico por imagem , Neoplasias/tratamento farmacológico , Neoplasias/terapia , Fenazinas/química , Terapia Fototérmica/métodos , Polietilenoglicóis/química , Teoria Quântica , Espectroscopia de Luz Próxima ao Infravermelho
14.
Holist Nurs Pract ; 36(1): 37-45, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-34783699

RESUMO

This qualitative study describes the psychological experience of patients hospitalized with COVID-19. These patients went through 3 psychological stages: extremely uncertainties during the initial diagnostic stage, complicated feelings of negativity during the treatment stage, and positive growth in the recovery stage. It is important for nurses to provide holistic care.


Assuntos
COVID-19 , Emoções , Humanos , Pesquisa Qualitativa , SARS-CoV-2
15.
Small ; 18(4): e2104521, 2022 01.
Artigo em Inglês | MEDLINE | ID: mdl-34821029

RESUMO

High-performance photothermal theranostics is urgently desired for cancer therapy because of their good controllability and noninvasive features. The relatively low photothermal conversion efficiency is still at the drawbacks because of the absence of efficient extraneous carriers. Herein, a carrier-free nanomedicine is developed to in vivo self-deliver organic photothermal agents for efficient cancer phototheranostics. By a facile self-assembly strategy, the near-infrared (NIR)-absorbing conjugated oligomer IDIC-4F is fabricated into a carrier-free nanoparticle (DCF-P), showing ultrasmall size of nearly 4.0 nm with a nearly 100% of drug loading capacity. Notably, DCF-P achieves a superhigh photothermal conversion efficiency of 80.5% that is far greater than that of IDIC-4F-loaded nanomicelle DCF-M (57.3%). With the guidance of NIR fluorescence and photoacoustic dual-imaging, it is verified that DCF-P could well achieve tumor-preferential accumulation and retention at 4 h postinjection, and meanwhile shows highly efficient in vivo tumor elimination with good biosafety. This study thus contributes a novel concept for designing ultrasmall nanoparticle characteristics of preferential accumulation in tumors, and also provides a strategy for creating high-performance carrier-free nanomedicine via highly ordered molecular stacking.


Assuntos
Neoplasias , Técnicas Fotoacústicas , Nanomedicina Teranóstica , Portadores de Fármacos/química , Humanos , Nanopartículas , Neoplasias/diagnóstico por imagem , Neoplasias/terapia , Técnicas Fotoacústicas/métodos , Fototerapia/métodos , Medicina de Precisão , Nanomedicina Teranóstica/métodos
16.
Curr Microbiol ; 78(11): 3980-3988, 2021 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-34557944

RESUMO

Methicillin-resistant Staphylococcus (S.) aureus (MRSA) is a representative pathogen that produces numerous virulence factors involving manifold cytotoxins and exotoxins. The present study was designed to investigate the influence of Eleutheroside K (ETSK), a single compound isolated from the leaves of Acanthopanax (A.) henryi (Oliv.) Harms, on the exotoxins secreted by MRSA. The transcription and translation of the exotoxins (α-hemolysin and staphylococcal enterotoxins) related to virulence in S. aureus were determined via quantitative RT-PCR and western blot analysis. The effect of ETSK on the production of tumor necrosis factor (TNF)-α was evaluated using enzyme-linked immunosorbent assay. As a result, ETSK at sub-MIC concentrations could reduce the protein expression of α-hemolysin and enterotoxin, and the expression of genes that regulate virulence factors was also inhibited. In addition, the TNF-inducing activity of S. aureus was attenuated by ETSK in a dose-dependent manner. These results revealed that ETSK not only reduced the protein and gene expression levels of related exotoxins but also suppressed the ability of S. aureus to induce macrophages to release cytokines. This study indicated that the inhibition of MRSA infection by ETSK may be achieved by reducing the virulence of S. aureus and highlighted the potential of ETSK as an innovative strategy for the prevention and treatment of MRSA infections.


Assuntos
Eleutherococcus , Staphylococcus aureus Resistente à Meticilina , Staphylococcus aureus Resistente à Meticilina/genética , Extratos Vegetais , Staphylococcus aureus , Virulência
17.
Emerg Microbes Infect ; 10(1): 1519-1529, 2021 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-34278967

RESUMO

The spike (S) protein of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) mutated continuously and newly emerging variants escape from antibody-mediated neutralization raised great concern. S protein is heavily glycosylated and the glycosylation sites are relatively conserved, thus glycans on S protein surface could be a target for the development of anti-SARS-CoV-2 strategies against variants. Here, we collected 12 plant-derived lectins with different carbohydrate specificity and evaluated their anti-SARS-CoV-2 activity against mutant strains and epidemic variants using a pseudovirus-based neutralization assay. The Lens culinaris-derived lentil lectin which specifically bind to oligomannose-type glycans and GlcNAc at the non-reducing end terminus showed most potent and broad antiviral activity against a panel of mutant strains and variants, including the artificial mutants at N-/O-linked glycosylation site, natural existed amino acid mutants, as well as the epidemic variants B.1.1.7, B.1.351, and P.1. Lentil lectin also showed antiviral activity against SARS-CoV and MERS-CoV. We found lentil lectin could block the binding of ACE2 to S trimer and inhibit SARS-CoV-2 at the early steps of infection. Using structural information and determined N-glycan profile of S trimer, taking together with the carbohydrate specificity of lentil lectin, we provide a basis for the observed broad spectrum anti-SARS-CoV-2 activity. Lentil lectin showed weak haemagglutination activity at 1 mg/mL and no cytotoxicity activity, and no weight loss was found in single injection mouse experiment. This report provides the first evidence that lentil lectin strongly inhibit infection of SARS-COV-2 variants, which should provide valuable insights for developing future anti-SARS-CoV-2 strategies.


Assuntos
Antivirais/farmacologia , Lens (Planta)/química , Extratos Vegetais/farmacologia , Lectinas de Plantas/farmacologia , SARS-CoV-2/efeitos dos fármacos , Animais , Antivirais/química , Humanos , Camundongos , Camundongos Endogâmicos BALB C , Extratos Vegetais/química , Lectinas de Plantas/química , SARS-CoV-2/crescimento & desenvolvimento , Sementes/química
18.
Artigo em Inglês | MEDLINE | ID: mdl-34239595

RESUMO

BACKGROUND: Sympathetic activation leads to elevated blood pressure. Neuronal nitric oxide synthase (nNOS) inhibits sympathetic nervous system activity, thereby decreasing blood pressure (BP). nNOS is highly expressed in the arcuate nucleus (ARC) and ventrolateral periaqueductal gray (vlPAG), which play essential roles in the regulation of the cardiovascular and sympathetic nervous systems. OBJECTIVE: This study was designed to verify the hypothesis that acupuncture exerts an antihypertensive effect via increasing the expression of nNOS in ARC and vlPAG of spontaneously hypertensive (SHR) rats. METHODS: Rats without anesthesia were subject to daily acupuncture for 2 weeks. BP was monitored by the tail-cuff method. nNOS expressions in the ARC and vlPAG were detected by western blot and immunofluorescence. BP was measured after 7-Nitroindazole (7-NI), a specific nNOS inhibitor, was microinjected into ARC or vlPAG in SHR rats treated with acupuncture. RESULTS: Acupuncture for 14 days significantly attenuated BP, and the Taichong (LR3) acupoint was superior to Zusanli (ST36) and Fengchi (GB20) in lowering BP. In addition, acupuncture at Taichong (LR3) induced an increase of nNOS expression in ARC and vlPAG, whereas microinjection of 7-NI into ARC or vlPAG reversed the antihypertensive effect of acupuncture. CONCLUSIONS: This study indicates that acupuncture at Taichong (LR3) induces a better antihypertensive effect than at Zusanli (ST36) or at Fengchi (GB20) in SHR rats, and enhancement of nNOS in ARC and vlPAG probably contributes to the antihypertensive effect of acupuncture.

19.
J Affect Disord ; 292: 592-602, 2021 09 01.
Artigo em Inglês | MEDLINE | ID: mdl-34147972

RESUMO

BACKGROUND: Prenatal depression affects 20.7 percent of women worldwide, which was associated with preterm birth, low birth weight and Apgar score, as well as cognitive, emotional and behavioral development disorders. We conducted a systematic review and meta-analysis to retrieve the latest and best evidence about music, massage, yoga and exercise in the prevention and treatment of prenatal depression, and to preliminarily compare the four methods to explore the most effective means. We also compared different types of yoga and music, in order to find the most effective type of intervention. METHODS: A comprehensive literature search was carried out through six databases on randomized controlled trials (RCTs). Effects were summarized by a random effects model using mean differences with 95% confidence intervals. Evidence quality was assessed using the Grading of Recommendations Assessment, Development, and Evaluation (GRADE) criteria. RESULTS: This research found low to very low evidence that yoga, exercise, music and massage could reduce antenatal depression. Among them, music may be the most effective intervention, and integrated yoga other than simple yoga would improve prenatal depression. The effect of Chinese Medicine Five Element Music may be better than ordinary music. CONCLUSION: It is important to support prenatal depression patients to make informed decisions about their behavior therapy.


Assuntos
Meditação , Música , Yoga , Depressão , Feminino , Humanos , Recém-Nascido , Massagem , Gravidez
20.
Zhongguo Zhong Yao Za Zhi ; 46(7): 1585-1591, 2021 Apr.
Artigo em Chinês | MEDLINE | ID: mdl-33982455

RESUMO

The spatial distribution uniformity of valuable medicines is the critical quality attribute in the process control of Tongren Niuhuang Qingxin Pills. With the real world sample of the mixed end-point powder of Tongren Niuhuang Qingxin Pills as the research object, hyperspectral imaging technology was used to collect a total of 32 400 data points with a size of 180 pix×180 pix. Spectral angle matching(SAM), classical least squares and mixed tuned matched filtering(MTMF) were used to identify the spatial distribution of rare medicines. MTMF model showed higher identification accuracy, therefore the spatial distribution of the blended intermediates was identified based on the MTMF model. The histogram method was also used to evaluate the spatial distribution uniformity of rare medicines. The results showed that the standard deviation was 4.78, 6.5, 3.48, 1.96, and 3.00 respectively for artificial bezoar, artificial musk, Borneol, Antelope horn and Buffalo horn; the variance was 22.8, 42.3, 12.1, 3.82, and 9.00, and the skewness was 1.26, 1.71, 0.06,-0.86, and 1.04, respectively. The final results showed that the most even blending was achieved in concentrated powder of Borneol, Antelope horn and Buffalo horn, followed by artificial bezoar, and last artificial musk. A visualization method was established for quality attributes of distribution uniformity in blending process of Tongren Niuhuang Qingxin Pills. It could provide evidences of quality control methods in the mixing process of big brand traditional Chinese medicine.


Assuntos
Medicamentos de Ervas Chinesas , Medicina Tradicional Chinesa , Pós , Controle de Qualidade
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