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1.
Appl Environ Microbiol ; 89(10): e0109323, 2023 10 31.
Artigo em Inglês | MEDLINE | ID: mdl-37815356

RESUMO

Climate change, microbial endophytes, and local plants can affect the establishment and expansion of invasive species, yet no study has been performed to assess these interactions. Using a growth chamber, we integrated the belowground (rhizosphere soils) and aboveground (mixture of mature leaf and leaf litter) microbiota into an experimental framework to evaluate the impacts of four native plants acting as microbial inoculation sources on endophyte assembly and growth of the invasive plant Ageratina adenophora in response to drought stress and temperature change. We found that fungal and bacterial enrichment in the leaves and roots of A. adenophora exhibited distinct patterns in response to climatic factors. Many fungi were enriched in roots in response to high temperature and drought stress; in contrast, many bacteria were enriched in leaves in response to low temperature and drought stress. Inoculation of microbiota from phylogenetically close native plant species (i.e., Asteraceae Artemisia atrovirens) causes the recipient plant A. adenophora (Asteraceae) to enrich dominant microbial species from inoculation sources, which commonly results in a lower dissimilar endophytic microbiota and thus produces more negative growth effects when compared to non-Asteraceae inoculations. Drought, microbial inoculation source, and temperature directly impacted the growth of A. adenophora. Both drought and inoculation also indirectly impacted the growth of A. adenophora by changing the root endophytic fungal assembly. Our data indicate that native plant identity can greatly impact the endophyte assembly and host growth of invasive plants, which is regulated by drought and temperature.IMPORTANCEThere has been increasing interest in the interactions between global changes and plant invasions; however, it remains to quantify the role of microbial endophytes in plant invasion with a consideration of their variation in the root vs leaf of hosts, as well as the linkages between microbial inoculations, such as native plant species, and climatic factors, such as temperature and drought. Our study found that local plants acting as microbial inoculants can impact fungal and bacterial enrichment in the leaves and roots of the invasive plant Ageratina adenophora and thus produce distinct growth effects in response to climatic factors; endophyte-mediated invasion of A. adenophora is expected to operate more effectively under favorable moisture. Our study is important for understanding the interactions between climate change, microbial endophytes, and local plant identity in the establishment and expansion of invasive species.


Assuntos
Ageratina , Asteraceae , Endófitos/fisiologia , Plantas/microbiologia , Ageratina/fisiologia , Espécies Introduzidas , Bactérias , Raízes de Plantas/microbiologia , Microbiologia do Solo
2.
Int J Mol Sci ; 24(4)2023 Feb 13.
Artigo em Inglês | MEDLINE | ID: mdl-36835162

RESUMO

As the greatest defense organ of the body, the skin is exposed to endogenous and external stressors that produce reactive oxygen species (ROS). When the antioxidant system of the body fails to eliminate ROS, oxidative stress is initiated, which results in skin cellular senescence, inflammation, and cancer. Two main possible mechanisms underlie oxidative stress-induced skin cellular senescence, inflammation, and cancer. One mechanism is that ROS directly degrade biological macromolecules, including proteins, DNA, and lipids, that are essential for cell metabolism, survival, and genetics. Another one is that ROS mediate signaling pathways, such as MAPK, JAK/STAT, PI3K/AKT/mTOR, NF-κB, Nrf2, and SIRT1/FOXO, affecting cytokine release and enzyme expression. As natural antioxidants, plant polyphenols are safe and exhibit a therapeutic potential. We here discuss in detail the therapeutic potential of selected polyphenolic compounds and outline relevant molecular targets. Polyphenols selected here for study according to their structural classification include curcumin, catechins, resveratrol, quercetin, ellagic acid, and procyanidins. Finally, the latest delivery of plant polyphenols to the skin (taking curcumin as an example) and the current status of clinical research are summarized, providing a theoretical foundation for future clinical research and the generation of new pharmaceuticals and cosmetics.


Assuntos
Carcinogênese , Senescência Celular , Inflamação , Estresse Oxidativo , Polifenóis , Humanos , Antioxidantes/farmacologia , Antioxidantes/uso terapêutico , Senescência Celular/fisiologia , Curcumina/farmacologia , Inflamação/metabolismo , Neoplasias/metabolismo , Fosfatidilinositol 3-Quinases/metabolismo , Polifenóis/farmacologia , Polifenóis/uso terapêutico , Espécies Reativas de Oxigênio/metabolismo
3.
J Org Chem ; 87(6): 4183-4194, 2022 Mar 18.
Artigo em Inglês | MEDLINE | ID: mdl-35234480

RESUMO

Free radical carbochloromethylations of ortho-cyanoarylacrylamides and N-(arylsulfonyl)acrylamides have been developed by employing simple alkyl chlorides as the chloromethyl source. The transformations are characterized by wide functional group compatibility and utilizing readily available reagents, thus providing efficient methods for constructing polychloromethyl-substituted quinoline-2,4-diones and α-aryl-ß-polychloromethylated amides.

4.
Molecules ; 27(6)2022 Mar 16.
Artigo em Inglês | MEDLINE | ID: mdl-35335279

RESUMO

In this study, ultrasonic-assisted cellulase extraction (UCE) was applied to extract flavonoids and polyphenols from the Nymphaea hybrid flower. The extraction conditions were optimized using the response surface method (RSM) coupled with a Box-Behnken design. The crude extract of Nymphaea hybrid (NHE) was further purified using AB-8 macroporous resins, and the purified extract (NHEP) was characterized by FTIR and HPLC. In vitro activity determination by chemical method showed that NHEP displayed strong free radical scavenging abilities against the DPPH and ABTS radicals, good reduction power, and hyaluronidase inhibition. The cell viability by CCK-8 assays showed that NHEP had no significant cytotoxicity for B16 and HaCaT cells when the concentration was below 100 µg/mL and 120 µg/mL, respectively. NHEP with a concentration of 20-160 µg/mL can more effectively reduce the ROS level in H2O2 damaged HaCaT cells compared with 10 µg/mL of VC. The 40 µg/mL of NHEP had similar activity against intracellular melanin production in the B16 melanoma cells compared with 20 µg/mL Kojic acid. Good activities of antioxidation, whitening and protective effect against H2O2-induced oxidative damage promote the potential for NHEP as a functional raw material in the field of cosmetics and medicine.


Assuntos
Celulase , Nymphaea , Antioxidantes/química , Antioxidantes/farmacologia , Flores , Células HaCaT , Humanos , Peróxido de Hidrogênio/farmacologia , Melaninas , Estresse Oxidativo , Espécies Reativas de Oxigênio
5.
J Org Chem ; 86(12): 8216-8225, 2021 06 18.
Artigo em Inglês | MEDLINE | ID: mdl-34085512

RESUMO

Novel decarboxylative oxyacyloxylation of propiolic acids has been developed. This reaction provides an efficient access to alkynyl-containing α-acyloxy ketones from readily available starting materials and exhibits significant functional group tolerance. Furthermore, oxyacyloxylation of terminal alkynes and aliphatic propiolic acids was also developed. A possible reaction mechanism is proposed based on mechanistic studies.


Assuntos
Alcinos , Cetonas , Catálise , Estrutura Molecular
6.
Bioorg Chem ; 116: 105357, 2021 11.
Artigo em Inglês | MEDLINE | ID: mdl-34562675

RESUMO

Gynostemma pentaphyllum (Thunb.) Makino (Cucurbitaceae family) is a perennial creeping plant with a common Chinese name of "south ginseng". To date, more than 250 individual saponins with dammarane-type skeleton have been isolated from G. pentaphyllum. The purpose of this study was the isolation and structural characterization of novel, minor gypenosides from G. pentaphyllum and evaluation of their Sirt1 agonist activity. Individual saponins from G. pentaphyllum were isolated and purified by a variety of chromatography techniques, and their structures were elucidated by means of various spectroscopic analysis and comparision with the reported data. Sirt1 enzyme activity detection kit was used to preliminarily evaluate the Sirt1 agonist activity of thirty three individual saponins purified from G. pentaphyllum. Fourteen new triterpenoid saponins named gypenoside CII-CXV (1-14) along with twenty six known compounds (15-40) were isolated from G. pentaphyllum. Thirty three of all the isolates were screened for Sirt1 agonist activity, and the results showed that three dammarane-type saponins (2, 18, 37) and one cucurbitane-type saponin 33 exhibited satisfactory Sirt1 agonist activity. These findings suggested that G. pentaphyllum was worthy of further investigation to find small molecule Sirt1 agonist and facilitate their utilization as "south ginseng".


Assuntos
Gynostemma/química , Saponinas/farmacologia , Sirtuína 1/metabolismo , Triterpenos/farmacologia , Relação Dose-Resposta a Droga , Humanos , Estrutura Molecular , Saponinas/química , Saponinas/isolamento & purificação , Relação Estrutura-Atividade , Triterpenos/química , Triterpenos/isolamento & purificação , Damaranos
7.
New Phytol ; 227(5): 1493-1504, 2020 09.
Artigo em Inglês | MEDLINE | ID: mdl-32343409

RESUMO

Local pathogens can accumulate as asymptomatic endophytes, making it difficult to detect the impacts of invasive species as propagators of disease in the invaded range. We used the invasive plant Ageratina adenophora to assess such accumulation. We intensively collected foliar fungal endophytes and leaf spot pathogens of A. adenophora and co-occurring neighbours and performed an inoculation experiment to evaluate their pathogenicity and host range. Ageratina adenophora harboured diverse necrotrophic pathogens; its communities of endophytes and leaf spot pathogens were different in composition and shared only a small number of fungal species. In the pathogen communities of local plant hosts, 21% of the operational taxonomic units (OTUs), representing 50% of strains, also occurred as leaf spot pathogens and/or endophytes of A. adenophora. The local pathogen community was more similar to the endophytes than to the pathogens of A. adenophora. The inoculation experiment showed that local pathogens could infect A. adenophora leaves asymptomatically and that local plant hosts were susceptible to both A. adenophora endophytes and pathogens. Ageratina adenophora is a highly competent host for local pathogens, and its asymptomatic latent pathogens are fungi primarily shared with local neighbours. This poses challenges for understanding the long-term ecological consequences of plant invasion.


Assuntos
Ageratina , Endófitos , Fungos , Espécies Introduzidas
8.
Appl Environ Microbiol ; 85(23)2019 12 01.
Artigo em Inglês | MEDLINE | ID: mdl-31540987

RESUMO

Exophiala pisciphila is one of the dominant dark septate endophytes (DSEs) colonizing metal-polluted slag heaps in southwest China. It shows numerous super-metal-tolerant characteristics, but the molecular mechanisms involved remain largely unknown. In the present study, the functional roles of a specific set of ATP-binding cassette (ABC) transporters in E. pisciphila were characterized. In total, 26 EpABC genes belonging to 6 subfamilies (ABCA to ABCG) were annotated in previous transcriptome sequencing libraries, and all were regulated by metal ions (Pb, Zn, and Cd), which was dependent on the metal species and/or concentrations tested. The results from the heterologous expression of 3 representative EpABC genes confirmed that the expression of EpABC2.1, EpABC3.1, or EpABC4.1 restored the growth of metal-sensitive mutant Saccharomyces cerevisiae strains and significantly improved the tolerance of Arabidopsis thaliana to Pb, Zn, and Cd. Interestingly, the expression of the 3 EpABC genes further altered metal (Pb, Zn, and Cd) uptake and accumulation and promoted growth by alleviating the inhibitory activity in yeast and thale cress caused by toxic ions. These functions along with their vacuolar location suggest that the 3 EpABC transporters may enhance the detoxification of vacuolar compartmentation via transport activities across their membranes. In conclusion, the 26 annotated EpABC transporters may play a major role in maintaining the homeostasis of various metal ions in different cellular compartments, conferring an extreme adaptative advantage to E. pisciphila in metal-polluted slag heaps.IMPORTANCE Many ABC transporters and their functions have been identified in animals and plants. However, little is known about ABC genes in filamentous fungi, especially DSEs, which tend to dominantly colonize the roots of plants growing in stressed environments. Our results deepen the understanding of the function of the ABC genes of a super-metal-tolerant DSE (E. pisciphila) in enhancing its heavy metal resistance and detoxification. Furthermore, the genetic resources of DSEs, e.g., numerous EpABC genes, especially from super-metal-tolerant strains in heavy metal-polluted environments, can be directly used for transgenic applications to improve tolerance and phytoextraction potential.


Assuntos
Transportadores de Cassetes de Ligação de ATP/genética , Arabidopsis/metabolismo , Exophiala/crescimento & desenvolvimento , Proteínas Fúngicas/genética , Saccharomyces cerevisiae/metabolismo , Poluentes do Solo/metabolismo , Transportadores de Cassetes de Ligação de ATP/metabolismo , Arabidopsis/genética , Cádmio/metabolismo , Exophiala/metabolismo , Proteínas Fúngicas/metabolismo , Chumbo/metabolismo , Microrganismos Geneticamente Modificados/genética , Microrganismos Geneticamente Modificados/metabolismo , Plantas Geneticamente Modificadas/genética , Plantas Geneticamente Modificadas/metabolismo , Saccharomyces cerevisiae/genética , Zinco/metabolismo
9.
Sichuan Da Xue Xue Bao Yi Xue Ban ; 49(3): 420-424, 2018 May.
Artigo em Chinês | MEDLINE | ID: mdl-30014646

RESUMO

OBJECTIVE: To explore the effect of IL-8 on the epithelial-to-mesenchymal transition (EMT) in ovarian cancer,which will provide experimental basis for revealing related molecular mechanism in malignant metastasis of ovarian cancer. METHODS: The migration of ovarian cancer cell line SKOV3 cells was explored with Real time label free cell analysis (RTCA) after treatment with recombinant human IL-8.SKOV3 cells were co-cultured with IL-8 for 48 h,proteins involved in EMT were investigated via Western blot to explore the effect of IL-8 on the activation of the EMT. Invasion of SKOV3 cells after treatment with IL-8 were evaluated by transwell assay. RESULTS: According to the results of RTCA,after treatment with IL-8 for 48 h,the migration of SKOV3 cells was in platform phase. The treatment of IL-8 unregulated vimentin and snail and downregulated E-cadherin,which suggested that IL-8 induced EMT in ovarian cancer. The results of transwell test showed that invasive ability of IL-8 pretreated SKOV3 cells was enhanced (P<0.05). CONCLUSION: IL-8 can induce the EMT of ovarian cancer and enhance the invasion and migration of ovarian cancer.


Assuntos
Transição Epitelial-Mesenquimal , Interleucina-8/farmacologia , Neoplasias Ovarianas/patologia , Vimentina/metabolismo , Antígenos CD/metabolismo , Caderinas/metabolismo , Linhagem Celular Tumoral , Movimento Celular , Feminino , Humanos , Invasividade Neoplásica , Fatores de Transcrição da Família Snail/metabolismo
10.
Small ; 13(18)2017 05.
Artigo em Inglês | MEDLINE | ID: mdl-28296136

RESUMO

Efficient and durable oxygen evolution reaction (OER) catalysts are highly required for the cost-effective generation of clean energy from water splitting. For the first time, an integrated OER electrode based on one-step direct growth of metallic iron-nickel sulfide nanosheets on FeNi alloy foils (denoted as FeNi3 S2 /FeNi) is reported, and the origin of the enhanced OER activity is uncovered in combination with theoretical and experimental studies. The obtained FeNi3 S2 /FeNi electrode exhibits highly catalytic activity and long-term stability toward OER in strong alkaline solution, with a low overpotential of 282 mV at 10 mA cm-2 and a small Tafel slope of 54 mV dec-1 . The excellent activity and satisfactory stability suggest that the as-made electrode provides an attractive alternative to noble metal-based catalysts. Combined with density functional theory calculations, exceptional OER performance of FeNi3 S2 /FeNi results from a combination of efficient electron transfer properties, more active sites, the suitable O2 evolution kinetics and energetics benefited from Fe doping. This work not only simply constructs an excellent electrode for water oxidation, but also provides a deep understanding of the underlying nature of the enhanced OER performance, which may serve as a guide to develop highly effective and integrated OER electrodes for water splitting.

11.
Int J Syst Evol Microbiol ; 66(10): 4016-4021, 2016 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-27411921

RESUMO

A bacterial strain, RS-LYSO-3T, was isolated from tobacco-cultivated soil, collected near Chuxiong, Yunnan province, southwestern China. RS-LYSO-3T could effectively inhibit the invasion of powdery mildew on tobacco. The colonies of RS-LYSO-3T were pale yellow, and its cells were Gram-stain-negative and rod-shaped, with 68 mol% DNA G+C content. Gene sequence analysis for its 16S rRNA gene revealed the highest similarity (97.78 %) with that of Lysobacter spongiicolaKMM 329T. Chemotaxonomic data showed that RS-LYSO-3T possesses a quinone system with Q-8, and iso-C16 : 0, summed feature 9 and iso-C15 : 0 as the predominant fatty acids, all of which support the affiliation of RS-LYSO-3T to the genus Lysobacter. The results of DNA-DNA hybridization, physiological and biochemical tests clearly proved that RS-LYSO-3T is a representative of a novel species of the genus Lysobacter, for which the name Lysobacter erysipheresistens sp. nov. is proposed. The type strain is RS-LYSO-3T (=CCIC 23922T=JCM 31042T).


Assuntos
Lysobacter/classificação , Nicotiana , Filogenia , Microbiologia do Solo , Antibiose , Ascomicetos , Técnicas de Tipagem Bacteriana , Composição de Bases , China , DNA Bacteriano/genética , Ácidos Graxos/química , Lysobacter/genética , Lysobacter/isolamento & purificação , Hibridização de Ácido Nucleico , RNA Ribossômico 16S/genética , Análise de Sequência de DNA , Ubiquinona/química
12.
Aging Clin Exp Res ; 28(2): 303-11, 2016 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-26138818

RESUMO

BACKGROUND: Recent studies indicate that consumption of the different calorie diet may be an important way to accelerate or slow the neurodegenerative disorder related to age. Long-term consumption of a high-calorie diet affects the brain and increase the risk of neurodegenerative disorders. And consumption of a low-calorie diet (caloric restriction, CR) could delay aging, and protect the central nervous system from neurodegenerative disorders. The underlying mechanisms have not yet been clearly defined. METHOD: Thirty 6-week-old C57/BL6 mice were randomly assigned to a NC group (fed standard diet, n = 10), a CR group (fed a low-calorie diet, n = 10) or a HC group (fed a high-calorie diet, n = 10) for 10 months. Body weight was measured monthly. Learning and memory capacity were determined by Morris water maze. Pathological changes of the hippocampus cells were detected with HE and Nissl staining. The expression of GFAP was determined by immunofluorescence and western blot. The expression of mTOR, S6K and LC3B in the hippocampus was determined by immunofluorescence. RESULTS: After feeding for 10 months, compared with mice in the NC group, mean body weight was significantly higher in the HC group and significantly lower in the CR group. The result of Morris water maze showed that compared with mice in the NC group, the learning and memory capacity was significantly increased in the CR group, and significantly decreased in the HC group. HE and Nissl staining of the hippocampus showed cells damaged obviously in the HC group. In the hippocampus, the expression of GFAP, mTOR and S6K was increased in the HC group, and decreased in the CR group. The expression of LC3B was decreased in the HC group, and increased in the CR group. CONCLUSIONS: Long-term consumption of a high-calorie diet could inhibit autophagy function, and facilitate neuronal loss in the hippocampus, which in turn aggravate age-related cognition impairment. And consumption of a low-calorie diet (caloric restriction, CR) could enhance the degree of autophagy, protect neurons effectively against aging and damage, and keep learning and memory capacity better.


Assuntos
Envelhecimento/fisiologia , Ingestão de Energia , Hipocampo , Doenças Neurodegenerativas , Animais , Autofagia/fisiologia , Restrição Calórica/métodos , Dieta , Hipocampo/metabolismo , Hipocampo/patologia , Aprendizagem/fisiologia , Masculino , Memória , Camundongos , Camundongos Endogâmicos C57BL , Modelos Animais , Doenças Neurodegenerativas/fisiopatologia , Doenças Neurodegenerativas/prevenção & controle , Serina-Treonina Quinases TOR/metabolismo
13.
Ecotoxicol Environ Saf ; 124: 363-368, 2016 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-26595509

RESUMO

Various metal transporters mediate sub-cellular sequestration of diverse metal ions, contribute to cellular metal tolerance, and control metal partitioning, particularly under conditions of high rates of metal influx into organisms. In the current study, a ubiquitous and evolutionary conserved metal transporter gene, homology to natural resistance associated macrophage protein (Nramp), was cloned from a metal-tolerant isolate of dark septate endophyte (DSE, Exophiala pisciphila), and its functional and transcript characterization were analyzed. The full-length Nramp gene from E. pisciphila (named EpNramp) was 1716 bp and expected to encode a polypeptide of 571 amino acid residues. EpNramp fused to green fluorescent protein suggested that EpNramp was a plasma membrane metal transporter, which was consistent with the results of bioinformatics analysis with 11 transmembrane domains. Yeast functional complementation revealed that EpNramp could complement the growth defect of Fe-uptake yeast mutant (fet3fet4 double mutant) by mediating the transport of Fe(2+). Expression of EpNramp increased Cd(2+) sensitivity and Cd(2+) accumulation in yeast. In addition, qPCR data revealed that E. pisciphila significantly down-regulated EpNramp expression with elevated Cd(2+) exposure. Altogether, EpNramp is a bivalent cation transporter localized in cell membrane, which is necessary for efficient translocation of both Fe and Cd, and its activities partly attributed to the tolerance of DSE to toxic and excessive Cd(2+) supplements.


Assuntos
Proteínas de Transporte de Cátions/genética , Exophiala/genética , Proteínas Fúngicas/genética , Cádmio/metabolismo , Endófitos/genética , Exophiala/metabolismo , Metais/metabolismo , Saccharomyces cerevisiae
14.
Heart Lung Circ ; 24(6): 590-4, 2015 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-25547530

RESUMO

BACKGROUND: The thoracoscope and minimally invasive techniques have been effectively used in cardiac surgery. METHODS: The study included 27 consecutive patients (aged 24.8±17.6 years), who underwent cardiac surgery from January 2012 to July 2013. Six patients were diagnosed with mitral valve stenosis (MS), 17 patients with atrial septal defects (ADSs), and four with ventricular septal defects (VSDs). All the patients underwent thoracoscope-assisted right vertical infra-axillary mini-incision (TARVAI). RESULTS: The procedure was successfully performed in all patients. For the patients with ASDs or VSDs, the times for cardiopulmonary bypass, aortic cross-clamping, operating (skin-to-skin), ventilation, ICU stay, postoperative hospital stay were 63±25 min, 28.1±15.5 min, 167.1±35.7 min, 5.2±2.7 h, 25.3±10.5 h, 8.7±3.6 days, and for the patients with MS, these were 143.3±25.2 min, 88.2±15.4 min, 236.5±48.5 min, 7.3±1.5 h, 36.7±9.1 h, and 13.5±4.4 days, respectively. The median postoperative drainage (total) for the ASD/VSD and MS patients was 136.3±54.5 ml and 203.8±94.4 ml, respectively. CONCLUSIONS: In our institution, the TARVAI approach is feasible and safe in cardiac surgery. It may be particularly useful in young patients with simple congenital heart disease and mitral valve disease.


Assuntos
Cardiopatias Congênitas/diagnóstico , Cardiopatias Congênitas/cirurgia , Cirurgia Torácica Vídeoassistida/métodos , Toracoscópios , Adolescente , Axila/cirurgia , Criança , Estudos de Coortes , Feminino , Seguimentos , Comunicação Interatrial/diagnóstico , Comunicação Interatrial/cirurgia , Comunicação Interventricular/diagnóstico , Comunicação Interventricular/cirurgia , Doenças das Valvas Cardíacas/diagnóstico , Doenças das Valvas Cardíacas/cirurgia , Humanos , Tempo de Internação , Masculino , Procedimentos Cirúrgicos Minimamente Invasivos/métodos , Valva Mitral/cirurgia , Duração da Cirurgia , Medição da Dor , Dor Pós-Operatória/fisiopatologia , Posicionamento do Paciente/métodos , Estudos Retrospectivos , Cirurgia Torácica Vídeoassistida/instrumentação , Resultado do Tratamento , Adulto Jovem
15.
Neurol Sci ; 35(11): 1821-6, 2014 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-24946940

RESUMO

We aim to study the therapeutic efficacy of analog P165 of amyloid precursor protein 5-mer peptide in streptozotocin (STZ)-induced cognitive decline model. Rats were divided into four groups: control, STZ, STZ+P165, and STZ+rosiglitazone (RSG). STZ model was established by intracerebroventricular injection of STZ. Three weeks following surgery, rats received daily gavage administration of distilled water (control and STZ groups), P165 (STZ+P165), or RSG (STZ+RSG) for four consecutive weeks. Learning and memory abilities were assessed with the Morris water maze test. Insulin-like growth factor-1 (IGF-1) was detected by ELISA. Expressions of insulin receptor-ß (IR-ß), insulin receptor substrate-1 (IRS-1), serine/threonine kinase (Akt), and phosphorylation of CREB (p-CREB) were observed by immunohistochemistry. Both P165 and RSG significantly reduced the escape latency relative to the STZ group (P165, P < 0.05; RSG, P < 0.01). STZ model rats had reduced levels of IGF-1 relative to control, and this deficit was attenuated in the STZ+P165 group (P < 0.01). IR and IRS-1 were elevated in STZ rats, and these levels were restored to near control in the STZ+P165 and STZ+RSG groups (P < 0.01). Our findings demonstrate that P165 and RSG improved hippocampus-dependent spatial learning and memory in STZ rats by regulating the insulin signaling pathway.


Assuntos
Precursor de Proteína beta-Amiloide/farmacologia , Encéfalo/efeitos dos fármacos , Transtornos Cognitivos/fisiopatologia , Aprendizagem em Labirinto/efeitos dos fármacos , Memória/efeitos dos fármacos , Fragmentos de Peptídeos/farmacologia , Receptor de Insulina/metabolismo , Animais , Encéfalo/metabolismo , Modelos Animais de Doenças , Hipoglicemiantes/farmacologia , Insulina/metabolismo , Masculino , Ratos , Ratos Sprague-Dawley , Rosiglitazona , Transdução de Sinais/efeitos dos fármacos , Estreptozocina/toxicidade , Tiazolidinedionas/farmacologia
16.
Immunopharmacol Immunotoxicol ; 36(6): 397-403, 2014 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-25204222

RESUMO

OBJECTIVE: To investigated whether CBS3830, a highly selectively inhibitor of p38MAPK, could ameliorate inflammation and intimal hyperplasia in arterialized vein grafts (AVGs). METHODS: Sixty male Sprague-Dawley rats underwent a reversed right jugular vein to common carotid artery interposition graft and were randomly treatment with vehicle (control) or single-dose (3 mg/kg, preoperative) or double-dose (3 mg/kg, preoperative and 4 d postoperative) CBS3830. Twenty rats underwent sham operation. The levels of tumor necrosis factor-α (TNF-α), interleukin-1ß (IL-1ß), and interleukin-6 (IL-6) were determined by ELISA. Vein grafts were analyzed by intimal/medial morphometry, proliferating cell nuclear antigen (PCNA) expression, and p38MAPK phosphorylation. RESULTS: TNF-α, IL-1ß, and IL-6 gradually increased then slowly decreased in AVG rats. However, at 4 d and 7 d, TNF-α levels decreased by 37.5% and 29.5% (p = 0.003, 0.05, respectively) in the single-dose CBS3830 group, and by 37.6% and 32.5%, respectively (both p = 0.003) in the double-dose group compared with those of control. IL-1ß levels significantly reduced at 4 d and 14 d in both dosage groups. IL-6 levels significantly reduced at 7 d in both groups. Intima and medial thickening were significantly reduced in both dosage treated groups at 7, 14, and 28 d (all p = 0.000) compared to the controls. Further study showed CBS3830 inhibited p38MAPK phosphorylation and decreased PCNA expression. CONCLUSIONS: CBS3830 significantly decreases inflammation and intimal hyperplasia in AVGs.


Assuntos
Anti-Inflamatórios/farmacologia , Proliferação de Células/efeitos dos fármacos , Dibenzocicloeptenos/farmacologia , Veias Jugulares/transplante , Túnica Íntima/efeitos dos fármacos , Proteínas Quinases p38 Ativadas por Mitógeno/antagonistas & inibidores , Animais , Relação Dose-Resposta a Droga , Oclusão de Enxerto Vascular/enzimologia , Oclusão de Enxerto Vascular/imunologia , Oclusão de Enxerto Vascular/patologia , Oclusão de Enxerto Vascular/prevenção & controle , Hiperplasia , Imunidade Inata/efeitos dos fármacos , Veias Jugulares/enzimologia , Veias Jugulares/imunologia , Veias Jugulares/patologia , Masculino , Antígeno Nuclear de Célula em Proliferação/biossíntese , Ratos Sprague-Dawley , Túnica Íntima/enzimologia , Túnica Íntima/imunologia , Túnica Íntima/patologia
17.
Medicine (Baltimore) ; 103(17): e37949, 2024 Apr 26.
Artigo em Inglês | MEDLINE | ID: mdl-38669359

RESUMO

Liver fibrosis is a critical factor in the advancement of nonalcoholic fatty liver disease towards cirrhosis. There is limited research exploring the association between obstructive sleep apnea (OSA) and liver fibrosis among community populations. The present study aimed to assess the association between sleep apnea (SA) and liver fibrosis based on the National Health and Nutrition Examination Survey (NHANES). Data were acquired from NHANES survey cycle 2017 to 2020. We assessed liver fibrosis by the median values of liver stiffness measurement (LSM). The diagnosis of SA was based on participants' response to sleep questionnaire. Univariate and multivariate logistic regression were used to validate the association of SA and liver fibrosis. A total of 7615 participants were included in this study. The LSM level of SA group was significantly higher than non-SA group. The proportion of liver fibrosis in SA group was markedly higher than that in non-SA group (14.0% vs 7.3%, P < .001). Univariate logistic analysis showed that SA was positively associated with liver fibrosis (OR = 2.068, 95%CI = 1.715-2.494, P < .001). Further multivariate logistic analysis revealed that SA was independently associated with increased risk of liver fibrosis after adjusting for confounding factors (OR = 1.277, 95%CI = 1.003-1.625, P = .048). The current study demonstrated an independent association between self-reported SA and increased risk of ultrasound-defined liver fibrosis in community-based sample.


Assuntos
Cirrose Hepática , Inquéritos Nutricionais , Ultrassonografia , Humanos , Masculino , Feminino , Cirrose Hepática/epidemiologia , Cirrose Hepática/diagnóstico por imagem , Cirrose Hepática/complicações , Pessoa de Meia-Idade , Adulto , Síndromes da Apneia do Sono/epidemiologia , Fatores de Risco , Estudos Transversais , Idoso , Apneia Obstrutiva do Sono/epidemiologia , Apneia Obstrutiva do Sono/complicações
18.
Heart Lung Circ ; 22(9): 751-8, 2013 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-23523564

RESUMO

OBJECTIVE: Following bypass surgery vein grafts undergo a remodelling process that can lead to restenosis and ultimately vein graft failure. Signalling through mitogen activated protein kinases (MAPKs) is a key mechanism involved in vein graft failure. Here, we investigated whether CBS3830 (c-a-i-r biosciences GmbH, Tübingen, Germany), a new highly selectively inhibitor of p38 MAPK, has a significant effect on inhibiting intimal, medial and adventitial hyperplasia. METHODS: Sixty specific pathogen free Sprague Dawley male rats were randomly divided into three groups. The control group with a reversed right jugular vein, which is common to carotid artery interposition graft, was compared with sham-operated, and CBS3830 treated animals. Intimal, medial and adventitia morphometric examinations and expression of proliferating cell nuclear antigen (PCNA) were analysed after one, two and four weeks for vein grafts. RESULTS: Intimal, medial and adventitia thickening in CBS3830 group were significantly lower than in the control group at each time point. Moreover, CBS3830 significantly reduced the phosphorylation of p38 MAPK and PCNA expression compared to the control. CONCLUSION: On the basis of the present work, intima, media and adventitia of saphenous vein grafts undergo vascular remodelling after surgery. The new, highly selective p38 MAPK inhibitor, CBS3830, ameliorates intimal, medial, and adventitial remodelling by varying degrees.


Assuntos
Ponte de Artéria Coronária , Oclusão de Enxerto Vascular/prevenção & controle , Inibidores de Proteínas Quinases/farmacologia , Veia Safena/enzimologia , Túnica Íntima/enzimologia , Proteínas Quinases p38 Ativadas por Mitógeno/antagonistas & inibidores , Túnica Adventícia/enzimologia , Túnica Adventícia/patologia , Túnica Adventícia/fisiopatologia , Animais , Regulação da Expressão Gênica/efeitos dos fármacos , Oclusão de Enxerto Vascular/enzimologia , Oclusão de Enxerto Vascular/patologia , Oclusão de Enxerto Vascular/fisiopatologia , Masculino , Fosforilação/efeitos dos fármacos , Antígeno Nuclear de Célula em Proliferação/biossíntese , Ratos , Ratos Sprague-Dawley , Veia Safena/patologia , Veia Safena/fisiopatologia , Túnica Íntima/patologia , Túnica Íntima/fisiopatologia , Proteínas Quinases p38 Ativadas por Mitógeno/metabolismo
19.
Zhongguo Zhong Xi Yi Jie He Za Zhi ; 33(9): 1212-5, 2013 Sep.
Artigo em Chinês | MEDLINE | ID: mdl-24273976

RESUMO

OBJECTIVE: To explore the effect and the mechanism of Danhong Injection (DI), Ligustrazine Injection (LI), and adsorbable biomembranes in preventing the adhesion of tendons and tissues. METHODS: Totally 120 patients all suffering from simple flexor digitorum tendon rupture on the hand zone two damaged by sharp weapons were randomly assigned to Group A (Dikang adsorbable biomembrane), Group B (Tianxinfu adsorbable biomembrane), Group C (Tianxinfu adsorbable biomembrane + Ligustrazine group), and Group D (Tianxinfu adsorbable biomembrane + DI group) in accordance with random digit table, 30 cases in each group. Indicators such as total active movement (TAM) of the hand tendon, Minnesota manual dexterity test (MMDT), and finger flex strength test (FFST) were observed. RESULTS: The TAM and the favorable rate were higher in Group C and D than in Group A and B at post-operative 4 and 8 week (P < 0.05, P < 0.01). There was no statistical difference between Group C and D (P > 0.05). Each index of MMDT was lower in Group C and D than in Group A and B (P < 0.05). There was no statistical difference in FFST among all the 4 groups (P > 0.05). CONCLUSIONS: Combined application of LI or DI with Tianxinfu adsorbable biomembranes could effectively prevent the adhesion of tendons. DI showed equivalent effect as LI did. Besides, the combined application was superior in preventing adhesion to using Xintianfu adsorbable biomembrane or Dikan adsorbable biomembrane alone.


Assuntos
Medicamentos de Ervas Chinesas/uso terapêutico , Doenças Musculoesqueléticas/prevenção & controle , Pirazinas/uso terapêutico , Traumatismos dos Tendões/cirurgia , Aderências Teciduais/prevenção & controle , Implantes Absorvíveis , Adulto , Medicamentos de Ervas Chinesas/administração & dosagem , Feminino , Humanos , Masculino , Membranas Artificiais , Pessoa de Meia-Idade , Pirazinas/administração & dosagem , Cicatrização
20.
Zhongguo Zhen Jiu ; 43(5): 600-4, 2023 May 12.
Artigo em Chinês | MEDLINE | ID: mdl-37161816

RESUMO

After reviewing and evaluating the Discipline History of Acupuncture and Moxibustion in China, the authors concludes that this book has the following characteristics: the scientific research focuses on the combination of internal and external history, and the conclusions are rigorous; the narrative style and structure featured by the division of discipline history of ancient times, modern times and current times are quite characteristic and enlightening; the reference materials are detailed and advanced, which showes profound thoughts and concerns about the difficulties and challenges faced by the development of acupuncture and moxibustion discipline and the internal path selection of acupuncture and moxibustion research. In addition, this book discusses the unique importance of the cultural attribute behind acupuncture and moxibustion technology in the process of theoretical research of acupuncture and moxibustion.


Assuntos
Terapia por Acupuntura , Moxibustão , China , Livros , Cabeça
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