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1.
Zhongguo Zhong Yao Za Zhi ; 48(20): 5612-5622, 2023 Oct.
Artigo em Chinês | MEDLINE | ID: mdl-38114154

RESUMO

This study aims to investigate the intervention effect of the aqueous extract of Epimedium sagittatum Maxim on the mouse model of bleomycin(BLM)-induced pulmonary fibrosis, so as to provide data support for the clinical treatment of pulmonary fibrosis. Ninety male C57BL/6N mice were randomized into normal(n=10), model(BLM, n=20), pirfenidone(PFD, 270 mg·kg~(-1), n=15), and low-, medium-, and high-dose E. sagittatum extract(1.67 g·kg~(-1), n=15; 3.33 g·kg~(-1), n=15; 6.67 g·kg~(-1), n=15) groups. The model of pulmonary fibrosis was established by intratracheal instillation of BLM(5 mg·kg~(-1)) in the other five groups except the normal group, which was treated with an equal amount of normal saline. On the day following the modeling, each group was treated with the corresponding drug by gavage for 21 days. During this period, the survival rate of the mice was counted. After gavage, the lung index was calculated, and the morphology and collagen deposition of the lung tissue were observed by hematoxylin-eosin(HE) and Masson staining, respectively. The levels of reactive oxygen species(ROS) in lung cell suspensions were measured by flow cytometry. The levels of glutathione peroxidase(GSH-Px), total superoxide dismutase(T-SOD), and malondialdehyde(MDA) the in lung tissue were measured. Terminal-deoxynucleoitidyl transferase-mediated nick-end labeling(TUNEL) was employed to examine the apoptosis of lung tissue cells. The content of interleukin-6(IL-6), chemokine C-C motif ligand 2(CCL-2), matrix metalloproteinase-8(MMP-8), transforming growth factor-beta 1(TGF-ß1), alpha-smooth muscle actin(α-SMA), E-cadherin, collagen Ⅰ, and fibronectin in the lung tissue was measured by enzyme-linked immunosorbent assay(ELISA). The expression levels of F4/80, Ly-6G, TGF-ß1, and collagen Ⅰ in the lung tissue were determined by immunohistochemistry. The mRNA levels of CCL-2, IL-6, and MMP-7 in the lung tissue were determined by qRT-PCR. The content of hydroxyproline(HYP) in the lung tissue was determined by alkaline hydrolysation. The expression of α-SMA and E-cadherin was detected by immunofluorescence, and the protein levels of α-SMA, vimentin, E-cadherin in the lung tissue were determined by Western blot. The results showed the aqueous extract of E. sagittatum increased the survival rate, decreased the lung index, alleviated the pathological injury, collagen deposition, and oxidative stress in the lung tissue, and reduced the apoptotic cells. Furthermore, the aqueous extract of E. sagittatum down-regulated the protein levels of F4/80 and Ly-6G and the mRNA levels of CCL-2, IL-6, and MMP-7 in the lung tissue, reduced the content of IL-6, CCL-2, and MMP-8 in the alveolar lavage fluid. In addition, it lowered the levels of HYP, TGF-ß1, α-SMA, collagen Ⅰ, fibronectin, and vimentin, and elevated the levels of E-cadherin in the lung tissue. The aqueous extract of E. sagittatum can inhibit collagen deposition, alleviate oxidative stress, and reduce inflammatory response by regulating the expression of the molecules associated with epithelial-mesenchymal transition, thus alleviating the symptoms of bleomycin-induced pulmonary fibrosis in mice.


Assuntos
Epimedium , Fibrose Pulmonar , Camundongos , Masculino , Animais , Fibrose Pulmonar/induzido quimicamente , Fibrose Pulmonar/tratamento farmacológico , Fibrose Pulmonar/metabolismo , Fator de Crescimento Transformador beta1/metabolismo , Epimedium/metabolismo , Fibronectinas/metabolismo , Metaloproteinase 7 da Matriz/metabolismo , Metaloproteinase 7 da Matriz/farmacologia , Metaloproteinase 7 da Matriz/uso terapêutico , Metaloproteinase 8 da Matriz/metabolismo , Metaloproteinase 8 da Matriz/farmacologia , Metaloproteinase 8 da Matriz/uso terapêutico , Vimentina/metabolismo , Interleucina-6/metabolismo , Camundongos Endogâmicos C57BL , Pulmão , Colágeno/metabolismo , Bleomicina/toxicidade , RNA Mensageiro/metabolismo , Caderinas/metabolismo
2.
World J Clin Cases ; 11(30): 7363-7371, 2023 Oct 26.
Artigo em Inglês | MEDLINE | ID: mdl-37969439

RESUMO

BACKGROUND: As one of the most important members in clinical trials, the number of clinical research nurses (CRN) can't keep up with the growth of experimental projects, so it is urgent to build clinical research training and strengthen the background knowledge of nurses. AIM: To construct CRN training program based on position competence, accelerate the construction of CRN talent pool, and provide scientific guidance significance for CRN training. METHODS: Based on the position competence model, combined with literature research and qualitative interview results, the first draft was prepared of the CRN training program. Two rounds of correspondence with 16 experts were conducted using the Delphi method to determine the training program. RESULTS: The effective recovery rate of the expert correspondence questionnaire was 100% and the authority coefficients of the 2 rounds of experts were 0.826 and 0.895. Finally, 4 first-level indicators and determine 15 s-level indicators of training objectives. The training program included 4 first-level indicators, training requirements, content, methods, assessment and evaluation, 15 s-level indicators, and 74 third-level indicators. CONCLUSION: The CRN training program based on position competence is scientific and extendable, providing a basis for participation in CRN training.

3.
Phytochemistry ; 215: 113840, 2023 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-37648044

RESUMO

Fifteen undescribed diterpenoid quinones salviamilthone A-O (1-15), together with three known diterpenoid quinones (16-18), were isolated from the roots of Salvia miltiorrhiza Bunge. Their structures were elucidated using 1D and 2D NMR data, while the relative and absolute configurations were confirmed by NOESY correlations and comparison between experimental and calculated ECD spectra. In the evaluation of bioactivities, salviamilthone J (10), salviamone (18) (10 µM) significantly increased cell viability and decreased the expression of IL-1ß in lipopolysaccharide-induced BEAS-2B cells. These data provide the molecular justification for the usage of Salvia miltiorrhiza in treating acute lung injury.


Assuntos
Diterpenos , Salvia miltiorrhiza , Salvia , Salvia miltiorrhiza/química , Quinonas/farmacologia , Raízes de Plantas/química , Salvia/química
4.
Fitoterapia ; 167: 105474, 2023 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-36940920

RESUMO

Seven new diterpenoids quinones (1-6), together with five known ones (7-11), were isolated from the roots of Salvia miltiorrhiza Bunge. Their structures were elucidated by using 1D and 2D NMR data, while the relative and absolute configurations were confirmed by interpretations of the NOESY correlations and comparison of the experimental and calculated ECD spectra. In the evaluation of bioactivities, salviamilthiza C (3), significantly increased cell viability and decreased the expression of IL-1ß in LPS-induced BEAS-2B cells.


Assuntos
Diterpenos , Salvia miltiorrhiza , Salvia , Salvia miltiorrhiza/química , Quinonas/farmacologia , Estrutura Molecular , Diterpenos/farmacologia , Diterpenos/química , Pulmão , Raízes de Plantas/química , Salvia/química
5.
Zhongguo Zhong Yao Za Zhi ; 47(18): 4996-5007, 2022 Sep.
Artigo em Chinês | MEDLINE | ID: mdl-36164910

RESUMO

This study aims to investigate mechanism of "Ephedrae Herba-Descurainiae Semen Lepidii Semen" combination(MT) in the treatment of bronchial asthma based on network pharmacology and in vivo experiment, which is expected to lay a theoretical basis for clinical application of the combination. First, the potential targets of MT in the treatment of bronchial asthma were predicted based on network pharmacology, and the "Chinese medicine-active component-target-pathway-disease" network was constructed, followed by Gene Oncology(GO) term enrichment and Kyoto Encyclopedia of Genes and Genomes(KEGG) pathway enrichment of the potential targets. Molecular docking was used to determine the binding activity of key candidate active components to hub genes. Ovalbumin(OVA, intraperitoneal injection for sensitization and nebulization for excitation) was used to induce bronchial asthma in rats. Rats were classified into control group(CON), model group(M), dexamethasone group(DEX, 0.075 mg·kg~(-1)), and MT(1∶1.5) group. Hematoxylin and eosin(HE), Masson, and periodic acid-Schiff(PAS) staining were performed to observe the effect of MT on pathological changes of lungs and trachea and goblet cell proliferation in asthma rats. The levels of transforming growth factor(TGF)-ß1, interleukin(IL)6, and IL10 in rat serum were detected by enzyme-linked immunosorbent assay(ELISA), and the mRNA and protein levels of mitogen-activated protein kinase 8(MAPK8), cyclin D1(CCND1), IL6, epidermal growth factor receptor(EGFR), phosphatidylinositol 3-kinase(PI3 K), and protein kinase B(Akt) by qRT-PCR and Western blot. Network pharmacology predicted that MAPK8, CCND1, IL6, and EGFR were the potential targets of MT in the treatment of asthma, which may be related to PI3 K/Akt signaling pathway. Quercetin and ß-sitosterol in MT acted on a lot of targets related to asthma, and molecular docking results showed that quercetin and ß-sitosterol had strong binding activity to MAPK, PI3 K, and Akt. In vivo experiment showed that MT could effectively alleviate the symptoms of OVA-induced asthma rats, improve the pathological changes of lung tissue, reduce the production of goblet cells, inhibit the inflammatory response of asthma rats, suppress the expression of MAPK8, CCND1, IL6, and EGFR, and regulate the PI3 K/Akt signaling pathway. Therefore, MT may relieve the symptoms and inhibit inflammation of asthma rats by regulating the PI3 K/Akt signaling pathway, and quercetin and ß-sitosterol are the candidate active components.


Assuntos
Asma , Medicamentos de Ervas Chinesas/uso terapêutico , Animais , Asma/tratamento farmacológico , Ciclina D1 , Dexametasona/efeitos adversos , Combinação de Medicamentos , Amarelo de Eosina-(YS)/efeitos adversos , Ephedra , Receptores ErbB , Hematoxilina/uso terapêutico , Interleucina-10 , Interleucina-6 , Proteína Quinase 8 Ativada por Mitógeno/uso terapêutico , Simulação de Acoplamento Molecular , Farmacologia em Rede , Ovalbumina/efeitos adversos , Ácido Periódico/efeitos adversos , Fosfatidilinositol 3-Quinases , Proteínas Proto-Oncogênicas c-akt/metabolismo , Quercetina , RNA Mensageiro , Ratos
6.
Nat Ecol Evol ; 6(9): 1354-1366, 2022 09.
Artigo em Inglês | MEDLINE | ID: mdl-35817827

RESUMO

Triploids are rare in nature because of difficulties in meiotic and gametogenic processes, especially in vertebrates. The Carassius complex of cyprinid teleosts contains sexual tetraploid crucian carp/goldfish (C. auratus) and unisexual hexaploid gibel carp/Prussian carp (C. gibelio) lineages, providing a valuable model for studying the evolution and maintenance mechanism of unisexual polyploids in vertebrates. Here we sequence the genomes of the two species and assemble their haplotypes, which contain two subgenomes (A and B), to the chromosome level. Sequencing coverage analysis reveals that C. gibelio is an amphitriploid (AAABBB) with two triploid sets of chromosomes; each set is derived from a different ancestor. Resequencing data from different strains of C. gibelio show that unisexual reproduction has been maintained for over 0.82 million years. Comparative genomics show intensive expansion and alterations of meiotic cell cycle-related genes and an oocyte-specific histone variant. Cytological assays indicate that C. gibelio produces unreduced oocytes by an alternative ameiotic pathway; however, sporadic homologous recombination and a high rate of gene conversion also exist in C. gibelio. These genomic changes might have facilitated purging deleterious mutations and maintaining genome stability in this unisexual amphitriploid fish. Overall, the current results provide novel insights into the evolutionary mechanisms of the reproductive success in unisexual polyploid vertebrates.


Assuntos
Carpas , Poliploidia , Animais , Genoma , Carpa Dourada/genética , Reprodução/genética
7.
Phytochemistry ; 200: 113224, 2022 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-35588867

RESUMO

This study aimed to report the structure elucidation of the compounds isolated from Salvia miltiorrhiza, and their biological evaluations. Ten undescribed diterpenoid quinones and 10 known analogues were isolated from the dried roots of S. miltiorrhiza. Their structures were elucidated by extensive analysis, including nuclear magnetic resonance, high-resolution mass spectra, and ultraviolet and infrared spectra. Their absolute configurations were determined by comparing the experimental and calculated electronic circular dichroism spectra. In the evaluation of bioactivities, Salvianolactone acid I, epi-danshenspiroketallactone F, danshinspiroketallactone, grandifolia G, and 2H-Naphtho [1,8-bc]furan (10 µM) significantly increased cell viability and decreased the nuclear transport of p-P65 in lipopolysaccharide-induced bronchial epithelial cells. It was concluded that the diterpenoid quinones might belong to potent targeted lung-protective agents.


Assuntos
Diterpenos , Salvia miltiorrhiza , Salvia , Diterpenos/química , Lipopolissacarídeos , Raízes de Plantas/química , Quinonas/farmacologia , Salvia/química , Salvia miltiorrhiza/química
8.
Am J Otolaryngol ; 43(3): 103426, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35460970

RESUMO

BACKGROUND: Asthma is one of the most common chronic diseases among children and adults and can lead to a high health and socioeconomic burden. Allergic rhinitis (AR) often precedes the development of asthma. This study aims to clarify the risk factors for cocurrent asthma in patients with AR in eastern China. METHODS: A cross-sectional study of 3739 patients with AR was performed in eastern China. Patients meeting the criteria for AR were evaluated using a skin-prick test (SPT) of 16 common aeroallergens. A logistic regression analysis was used to assess the risk factors of asthma in patients with AR. RESULTS: The prevalence of asthma in patients with AR was 14.23%. The patients sensitive to dust mites (D. farinae and D. pteronyssinus) had the highest prevalence (76.84% and 73.68%). A significant difference was found in sensitization to four types of allergens (D. farinae, D. pteronyssinus, dog dander, Alternaria alternata) in patients with AR with and without asthma. The strongest risk factor for asthma in patients with AR was an allergy to Aspergillus fumigatus (adjusted OR, 2.42; 95% CI, 1.50-3.90), followed by allergy to D. pteronyssinus (adjusted OR, 2.06; 1.30-3.27), and allergy to dog dander (adjusted OR, 1.92; 1.24-2.97). Various risk factors that are independently associated with asthma in patients with AR were found in different age groups. CONCLUSIONS: We observed a difference in risk factors in patients with AR with and without asthma. Clarifying the risk factors for asthma in patients with AR is important and may be beneficial to the optimal interventions of asthma.


Assuntos
Asma , Rinite Alérgica , Alérgenos/efeitos adversos , Animais , Asma/epidemiologia , Asma/etiologia , China/epidemiologia , Estudos Transversais , Dermatophagoides farinae , Cães , Humanos , Prevalência , Pyroglyphidae , Hipersensibilidade Respiratória/diagnóstico , Hipersensibilidade Respiratória/epidemiologia , Rinite Alérgica/complicações , Rinite Alérgica/epidemiologia , Fatores de Risco , Testes Cutâneos
9.
Mol Plant Pathol ; 22(12): 1668-1687, 2021 12.
Artigo em Inglês | MEDLINE | ID: mdl-34553471

RESUMO

Systemic acquired resistance (SAR) is induced by pathogens and confers protection against a broad range of pathogens. Several SAR signals have been characterized, but the nature of the other unknown signalling by small metabolites in SAR remains unclear. Glutathione (GSH) has long been implicated in the defence reaction against biotic stress. However, the mechanism that GSH increases plant tolerance against virus infection is not entirely known. Here, a combination of a chemical, virus-induced gene-silencing-based genetics approach, and transgenic technology was undertaken to investigate the role of GSH in plant viral resistance in Nicotiana benthamiana. Tobacco mosaic virus (TMV) infection results in increasing the expression of GSH biosynthesis genes NbECS and NbGS, and GSH content. Silencing of NbECS or NbGS accelerated oxidative damage, increased accumulation of reactive oxygen species (ROS), compromised plant resistance to TMV, and suppressed the salicylic acid (SA)-mediated signalling pathway. Application of GSH or l-2-oxothiazolidine-4-carboxylic acid (a GSH activator) alleviated oxidative damage, decreased accumulation of ROS, elevated plant local and systemic resistance, enhanced the SA-mediated signalling pathway, and increased the expression of ROS scavenging-related genes. However, treatment with buthionine sulfoximine (a GSH inhibitor) accelerated oxidative damage, elevated ROS accumulation, compromised plant systemic resistance, suppressed the SA-mediated signalling pathway, and reduced the expression of ROS-regulating genes. Overexpression of NbECS reduced oxidative damage, decreased accumulation of ROS, increased resistance to TMV, activated the SA-mediated signalling pathway, and increased the expression of the ROS scavenging-related genes. We present molecular evidence suggesting GSH is essential for both local and systemic resistance of N. benthamiana to TMV through a differential modulation of SA and ROS.


Assuntos
Glutationa , Doenças das Plantas/virologia , Vírus do Mosaico do Tabaco , Resistência à Doença , Regulação da Expressão Gênica de Plantas , Proteínas de Plantas/metabolismo , Espécies Reativas de Oxigênio/metabolismo , Ácido Salicílico/metabolismo , /virologia
10.
J Integr Neurosci ; 20(2): 393-397, 2021 Jun 30.
Artigo em Inglês | MEDLINE | ID: mdl-34258938

RESUMO

Epilepsy is a common heterogeneous group of neurological disorders including electroencephalographic and brain imaging. We used whole exome sequencing and whole genome sequencing to identify variants in a pedigree associated with epilepsy. Cranium CT scan showed that the lateral right parietal lobe was hyperdense, and there were no clear boundaries with brain tissue in affected cases. Using WES, one exclusive nonsynonymous mutant in gene TSC2 (Chr16:2138307; c.5240 T > G; p.Ile1747Ser) was involved in this disease. Further analysis showed that de novo variant in TSC2 was high conserved across different species. Moreover, the two affected sisters and their father had the same compound heterozygous variants in TSC2, while the father had no epilepsy but depigmentation. These variants demonstrated that variant in TSC2 may result in epilepsy with incomplete penetrance in humans, and the CNV and SV variants we identified probably be involved in this disease.


Assuntos
Síndromes Epilépticas/genética , Proteína 2 do Complexo Esclerose Tuberosa/genética , Sequenciamento Completo do Genoma , Adulto , Pré-Escolar , Síndromes Epilépticas/diagnóstico por imagem , Síndromes Epilépticas/fisiopatologia , Feminino , Humanos , Masculino , Linhagem , Sequenciamento do Exoma
11.
Eur Cytokine Netw ; 30(3): 88-97, 2019 Sep 01.
Artigo em Inglês | MEDLINE | ID: mdl-31957703

RESUMO

Dexmedetomidine (Dex), frequently used as an effective sedative, was reported to play a critical role in the protection of multiple organs. However, its underlying mechanism of a putative protective effect on ischemia/reperfusion (I/R)-induced liver injury is still unclear. A hepatocyte injury model was established by treating WRL-68 cells with oxygen and glucose deprivation/reoxygenation (OGD/R). Enzyme Linked Immunosorbent Assay (ELISA) kits were used to determine the level of inflammatory factors (IL-6, IL-1ß, and TNF-α), and oxidative stress indicators (ROS, MDA, GSH-Px, and SOD). MTT assay and flow cytometry analysis were used to determine the influence of Dex on cell viability and cell apoptosis. Expression of nuclear factor erythroid-derived 2- like 2 (Nrf2), HO-1, and apoptosis-related proteins (Bax, Bcl-2, caspase3, and caspase9) were detected by qRT-PCR and western blotting. Dex promoted cell viability and suppressed cell apoptosis in OGD/R-treated WRL-68 cells. Dex reduced TNF-α, IL-6, IL-1ß, ROS, and MDA production, whereas it increased that of SOD and GSH-Px in OGD/R-treated WRL-68 cells. Moreover, Nrf2, HO-1, and Bcl-2 expression was upregulated, whereas, in contrast, transcripts for Bax, caspase3, and caspase9 were downregulated following Dex treatment under OGD/R. Knockdown of Nrf2 reversed the Dex effects on cell proliferation, apoptosis, and expression of TNF-α, IL-6, IL-1ß, ROS, MDA, SOD, and GSH-Px. Dex protects WRL-68 cells against OGD/R-induced injury by inhibiting inflammation, oxidative stress, and cell apoptosis via the activation of Nrf2/HO-1 signaling pathway, suggesting that Dex may be a potential protector against hepatic injury.


Assuntos
Dexmedetomidina/farmacologia , Heme Oxigenase-1/metabolismo , Fígado/efeitos dos fármacos , Fator 2 Relacionado a NF-E2/metabolismo , Estresse Oxidativo/efeitos dos fármacos , Traumatismo por Reperfusão/metabolismo , Transdução de Sinais/efeitos dos fármacos , Apoptose/efeitos dos fármacos , Linhagem Celular , Proliferação de Células/efeitos dos fármacos , Sobrevivência Celular/efeitos dos fármacos , Citocinas/metabolismo , Regulação para Baixo/efeitos dos fármacos , Glucose/metabolismo , Hepatócitos/efeitos dos fármacos , Hepatócitos/metabolismo , Humanos , Inflamação/metabolismo , Fígado/metabolismo , Oxigênio/metabolismo , Regulação para Cima/efeitos dos fármacos
12.
Eur J Pharmacol ; 837: 53-63, 2018 Oct 15.
Artigo em Inglês | MEDLINE | ID: mdl-30172787

RESUMO

We recently characterized a novel bifunctional agonist for opioid and neuropeptide FF receptors, named BN-9, which exhibited potent analgesia in the mouse tail-flick test when given centrally. To further evaluate its potential therapeutic efficacy for translational-medical development, the current work was performed to explore the antinociceptive activities of intraperitoneal (i.p.) administration of BN-9 in mouse models of tail-flick assay, formalin pain, visceral pain and post-operative pain. In the tail-flick test, BN-9 induced a dose-related antinociceptive effect, which was fully blocked by systemic pretreatment with the peripheral acting opioid receptor antagonist naloxone methiodide, but not supraspinal naloxone methiodide, implying the involvement of the peripheral opioid receptors. In addition, the systemic antinociception of BN-9 was antagonized by the selective antagonists of the µ- and κ-opioid receptors, independently of the δ-opioid and neuropeptide FF receptors. Similarly, dose-dependent analgesia was also produced by systemic BN-9 in different pain models via the peripheral opioid receptors, independently of the neuropeptide FF receptors. Furthermore, the side-effects of systemic BN-9 on motor performance, tolerance development and gastrointestinal transit inhibition were also evaluated. Repeated systemic injection of BN-9 produced non-tolerance analgesia over 8 days. Compared with morphine, intraperitoneal administration of BN-9 exerted less inhibition of gastrointestinal transit. These data show that BN-9 induced systemic analgesia with reduced side-effects on tolerance and constipation. This article suggests that systemic injection of BN-9 causes effective antinociception in different preclinical pain models via the peripheral opioid receptors, providing an attractive approach to develop peripherally acting opioid analgesics with multiple targeting properties.


Assuntos
Analgésicos/uso terapêutico , Oligopeptídeos/uso terapêutico , Dor/tratamento farmacológico , Receptores de Neuropeptídeos/agonistas , Animais , Modelos Animais de Doenças , Relação Dose-Resposta a Droga , Estabilidade de Medicamentos , Tolerância a Medicamentos , Trânsito Gastrointestinal/efeitos dos fármacos , Masculino , Camundongos , Oligopeptídeos/química , Oligopeptídeos/farmacologia
13.
Ying Yong Sheng Tai Xue Bao ; 27(10): 3273-3282, 2016 Oct.
Artigo em Chinês | MEDLINE | ID: mdl-29726154

RESUMO

In this paper, topsoil salinity data gathered from 24 sampling sites in the Yutian Oasis were used, nine different kinds of environmental variables closely related to soil salinity were selec-ted as influencing factors, then, the spatial distribution characteristics of topsoil salinity and spatial heterogeneity of influencing factors were analyzed by combining the spatial autocorrelation with traditional regression analysis and geographically weighted regression model. Results showed that the topsoil salinity in Yutian Oasis was not of random distribution but had strong spatial dependence, and the spatial autocorrelation index for topsoil salinity was 0.479. Groundwater salinity, groundwater depth, elevation and temperature were the main factors influencing topsoil salt accumulation in arid land oases and they were spatially heterogeneous. The nine selected environmental variables except soil pH had significant influences on topsoil salinity with spatial disparity. GWR model was superior to the OLS model on interpretation and estimation of spatial non-stationary data, also had a remarkable advantage in visualization of modeling parameters.


Assuntos
Água Subterrânea/química , Salinidade , Solo/química , China , Análise de Regressão , Cloreto de Sódio , Análise Espacial , Regressão Espacial
14.
Exp Ther Med ; 5(2): 581-585, 2013 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-23403473

RESUMO

In the present study, we examined the effect of etanercept on high mobility group box 1 (HMGB1) expression in dorsal root ganglion (DRG) neuron cells in a rat model of chronic constriction injury (CCI) of the sciatic nerve, with the aim of exploring the molecular mechanism underlying the therapeutic effect of etanercept on sciatica-related nociception and the potential interaction between tumor necrosis factor-α (TNF-α) and HMGB1 in DRG neuron cells. A rat CCI model was employed and the animals were randomly assigned to seven groups (n=20/group): untreated, sham only, sham/saline, sham/etanercept, CCI only, CCI/saline and CCI/etanercept. Our results revealed that compared with the sham/saline and sham/etanercept groups, thermal hyperalgesia and mechanical hyperalgesia, as well as HMGB1 expression at both the mRNA and protein levels in the DRG neuron cells, were induced by CCI, and were significantly inhibited by etanercept. Although etanercept showed no significant effect on the sham group, it significantly reduced the phosphorylated p38 mitogen-activated protein kinase (MAPK) levels induced by CCI in the DRG neuron cells. In conclusion, we demonstrated that etanercept significantly decreased the HMGB1 expression induced by CCI in the DRG neuron cells. This study not only explored the molecular mechanisms underlying the therapeutic effect of etanercept on sciatica-related nociception, but also provided indirect evidence for an interaction between TNF-α and HMGB1 in DRG neuron cells.

15.
Hepat Mon ; 11(3): 163-72, 2011 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-22087138

RESUMO

BACKGROUND: Hepatitis C is a global health problem and represents a major cause of liver disease and socioeconomic burden. Effective antiviral therapy may prevent these complications, but the current treatment for patients with chronic hepatitis C virus (HCV) infection does not produce sustained virologic response. Therefore, identification of the determinants of response to treatment is a high priority. A number of host and viral factors have been associated with treatment outcomes. OBJECTIVES: To assess the associations of single nucleotide polymorphisms (SNP) of the IL28B and sustained virologic response (SVR) of patients with chronic hepatitis C to PEG-interferon/ribavirin therapy. MATERIALS AND METHODS: We searched PubMed, Medline and Cochrane Library, and found 7 eligible papers involved in this study. Then we performed a meta-analysis comparing the SVR rate at SNP of the IL28B in individuals with PEG-interferon/ribavirin therapy. Meanwhile, the SVR rate between different races and HCV genotypes was studied. RESULTS: The sustained virologic response rate was higher in patients with the rs12979860 CC and rs8099917 TT alleles in the IL28B SNP, comparing with the rs12979860 CT, or TT and rs8099917 TG or GG. Furthermore, a higher SVR was observed in the Caucasians than in Afro-Americans (OR = 3.85, 95% CI: 3.06-4.83); the percentage of rs12979860 TT genotype was lower in Caucasians (OR = 0.25, 95% CI: 0.20-0.31) and the percentage of rs12979860 CC genotype was higher in Caucasians than that of Afro-Americans (OR = 3.45, 95% CI = 2.68-4.44). Between different HCV genotypes, the SVR was much lower in those with HCV genotype 1 than those with genotype 2/3 (OR = 0.16, 95% CI: 0.11-0.24). CONCLUSIONS: IL28B is significantly associated with response to PEG-interferon/ribavirin therapy of patients with chronic HCV infection. Both the rs12979860 and rs8099917 alleles could be used as independent predictors of the treatment response. The rs12979860 allele in particular, is more important from our study. The polymorphism even explains part the difference in response rate between different ethnic groups and HCV genotypes.

16.
Virol J ; 8: 72, 2011 Feb 15.
Artigo em Inglês | MEDLINE | ID: mdl-21324130

RESUMO

BACKGROUND: The effect of antiviral therapy in chronic hepatitis B (CHB) on reducing the risk of long-term complications (LTCs) remains unclear so far. To study whether long-term nucleos(t)ide analogues therapy can reduce the risk of long-term complications. METHODS: We searched MEDLINE, EMBASE, OVID, the Cochrane Central Register of Controlled Trials. Relative risks (RRs) of long-term complications with or without treatment were studied. Also subgroup analyses including the status of drug-resistance, HBeAg and pre-existing compensated cirrhosis were done using relative risks of long-term complications either with or without treatment or among nucleos(t)ide analogues treatment groups. RESULTS: Six eligible studies (3644 patients in all) were included. Data showed the incidence of long-term complications in treatment groups was induced by 74%(RR:0.26, 95% CI: 0.15-0.47) compared with no treatment. Whether drug-resistant happened or not during the long-term therapy, the incidence of long-term complications was still significantly induced respectively by 45%(RR: 0.55,95%CI:0.40-0.76) and 78% (RR:0.22, 95%CI: 0.13-0.36). For both different status of HBeAg and pre-existing compensated cirrhosis, there was significant lower incidence of long-term complications in treatment groups compared with no treatment, too. Moreover, among the NA treatment groups, patients with drug-resistance had 2.64 times (RR:2.64, 95%CI: 1.58-4.41) higher chance of developing to long-term complications, and patients with pre-existing compensated cirrhosis also had 3.07 times (RR:3.07, 95%CI: 1.04-9.11) higher chance of developing to long-term complications. CONCLUSIONS: Long-term nucleos(t)ide analogue therapy for adults with CHB prevents or delays the development of long-term complications including decompensated cirrhosis, CHB-related death or CHB-related HCC in patients with CHB. The patients who need take antiviral drugs should receive the antiviral therapy as soon as possible.


Assuntos
Antivirais/administração & dosagem , Carcinoma Hepatocelular/epidemiologia , Hepatite B Crônica/complicações , Hepatite B Crônica/tratamento farmacológico , Cirrose Hepática/epidemiologia , Neoplasias Hepáticas/epidemiologia , Adulto , Carcinoma Hepatocelular/mortalidade , Carcinoma Hepatocelular/prevenção & controle , Humanos , Cirrose Hepática/mortalidade , Cirrose Hepática/prevenção & controle , Neoplasias Hepáticas/mortalidade , Neoplasias Hepáticas/prevenção & controle
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