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1.
Front Integr Neurosci ; 17: 1052683, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-36864895

RESUMO

Objective: Care patterns and Traditional Chinese Medicine (TCM) constitution affects the emotion and health of patients with systemic sclerosis (SSc) while the prevalence of COVID-19 may aggravate such patients' emotion and health. We investigated the depression and anxiety levels of patients with SSc during the pandemic to identify the correlation between care patterns, TCM constitution, and patients' emotion. Materials and methods: This was a cross-sectional study. Patients with SSc and healthy individuals were surveyed using the patient health questionnaire-9, generalized anxiety disorder-7, and constitution in Chinese medicine questionnaire and a modified care pattern questionnaire. Factors correlated with depression and anxiety were screened using univariate and multivariate logistic regression analyses. Results: A total of 273 patients with SSc and 111 healthy individuals were included in the analysis. The proportion of patients with SSc who were depressed was 74.36%, who had anxiety was 51.65%, and who experienced disease progression during the pandemic was 36.99%. The proportion of income reduction in the online group (56.19%) was higher than that in the hospital group (33.33%) (P = 0.001). Qi-deficiency [adjusted odds ratio (OR) = 2.250] and Qi-stagnation (adjusted OR = 3.824) constitutions were significantly associated with depression. Remote work during the outbreak (adjusted OR = 1.920), decrease in income (adjusted OR = 3.556), and disease progression (P = 0.030) were associated with the occurrence of depression. Conclusion: Chinese patients with SSc have a high prevalence of depression and anxiety. The COVID-19 pandemic has changed the care patterns of Chinese patients with SSc, and work, income, disease progression, and change of medications were correlates of depression or anxiety in patients with SSc. Qi-stagnation and Qi-deficiency constitutions were associated with depression, and Qi-stagnation constitution was associated with anxiety in patients with SSc. Trial registration: http://www.chictr.org.cn/showproj.aspx?proj=62301, identifier ChiCTR2000038796.

3.
ACS Appl Mater Interfaces ; 14(41): 47036-47051, 2022 Oct 19.
Artigo em Inglês | MEDLINE | ID: mdl-36203356

RESUMO

Incurable implant-related infection may cause catastrophic consequences due to the existence of a biofilm that resists the infiltration of host immune cells and antibiotics. Innovative approaches inspired by nanomedicine, e.g., engineering innovative multifunctional bionic coating systems on the surface of implants, are becoming increasingly attractive. Herein, 2D black phosphorus nanosheets (BPs) were loaded onto a hydroxyapatite (HA)-coated metal implant to construct a BPs@HA composite coating. With its photothermal conversion effect and in situ biomineralization, the BPs@HA coating shows excellent performances in ablating the bacterial biofilm and accelerating fracture healing, which were verified through both in vitro and in vivo studies. Moreover, differentially expressed genes of bone formation and bone mesenchymal stem cells (BMSCs) regulated by the BPs@HA coating were identified using absolute quantitative transcriptome sequencing followed by the screening of gene differential expressions. A functional enrichment analysis reveals that the expression of core markers related to BMSC differentiation and bone formation could be effectively regulated by BPs through a metabolism-related pathway. This work not only illustrates the great potential in clinical application of the BPs@HA composite coating to eliminate bacteria and accelerate bone fracture healing but also contributes to an understanding of the underlying molecular mechanism of osteogenesis physiological function regulation based on an analysis of absolute quantitative transcriptome sequencing.


Assuntos
Consolidação da Fratura , Fósforo , Fósforo/farmacologia , Durapatita/farmacologia , Osteogênese , Biofilmes , Aceleração , Antibacterianos/farmacologia , Materiais Revestidos Biocompatíveis/farmacologia , Titânio/farmacologia
4.
Environ Pollut ; 314: 120225, 2022 Dec 01.
Artigo em Inglês | MEDLINE | ID: mdl-36150626

RESUMO

Polychlorinated naphthalenes (PCNs) are highly toxic and persistent organic pollutants that can cause adverse effects in the environment and on human health. PCNs have been detected in remote areas because of their long-range transportation. Bees and bee products are commonly used as biomonitors for various pollutants in the environment. However, information on PCNs in apiaries is scarce. The aim of this study was to evaluate the occurrences of PCNs in bees and bee products from apiaries located in different geographical regions of China, and to identify potential pollution sources and assess exposure risks to humans. Our results showed that the average Σ75PCNs concentrations in bees, pollen, and wax were 74.1, 96.3, and 141 pg/g dry weight, respectively. The homologue and congener profiles of PCNs in bees, pollen, and wax were similar, and di- and tri-chlorinated naphthalenes (>60%) were the predominant homologues. The concentrations and distributions of PCNs in bees, pollen, and wax varied among different geographical regions, but their occurrences were correlated with PCN metallurgical sources in China. The health risks of PCNs in pollen were evaluated, and both carcinogenic and non-carcinogenic risks of PCNs exposure to humans through the diet were low.


Assuntos
Monitoramento Ambiental , Poluentes Ambientais , Animais , Humanos , Abelhas , China , Naftalenos/análise , Poluentes Orgânicos Persistentes , Pólen/química
5.
Carbohydr Res ; 517: 108575, 2022 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-35552063

RESUMO

Oleanolic acid 3-O-ß-d-glucopyranosyl-(1 â†’ 3)-ß-d-glucopyranoside (1) and oleanolic acid 3-O-ß-d-glucopyranosyl-(1 â†’ 3)-[α-l-arabinofuranosyl-(1 â†’ 4)]-ß-d-glucopyranoside (2), novel Panax stipulcanatus saponin analogues, were synthesized for the first time starting from commercially available oleanolic acid, d-glucose, and L-(+)-arabinose. Glycosyl N-phenyltrifluoroacetimidates as donors and two-step consecutive glycosylation reactions are crucial in the synthesis. In vitro antifungal activity results indicated that analogue 2 combined with fluconazole showed synergistic antifungal activity against fluconazole-resistant Candida albicans, with MIC50 values 31.80 µg/mL and FICI values 0.32. We also found that intermediate compounds 16 and 17 revealed synergistic antifungal activity against susceptible Candida albicans when combined with fluconazole, with MIC50 values 1.43 µg/mL and 1.59 µg/mL, FICI values 0.29 and 0.32, respectively.


Assuntos
Ácido Oleanólico , Panax , Saponinas , Antifúngicos/farmacologia , Candida albicans , Farmacorresistência Fúngica , Sinergismo Farmacológico , Fluconazol/farmacologia , Testes de Sensibilidade Microbiana , Ácido Oleanólico/farmacologia , Saponinas/farmacologia
6.
PLoS Genet ; 17(3): e1009458, 2021 03.
Artigo em Inglês | MEDLINE | ID: mdl-33755662

RESUMO

Precise regulation of ocular size is a critical determinant of normal visual acuity. Although it is generally accepted that ocular growth relies on a cascade of signaling events transmitted from the retina to the sclera, the factors and mechanism(s) involved are poorly understood. Recent studies have highlighted the importance of the retinal secreted serine protease PRSS56 and transmembrane glycoprotein MFRP, a factor predominantly expressed in the retinal pigment epithelium (RPE), in ocular size determination. Mutations in PRSS56 and MFRP constitute a major cause of nanophthalmos, a condition characterized by severe reduction in ocular axial length/extreme hyperopia. Interestingly, common variants of these genes have been implicated in myopia, a condition associated with ocular elongation. Consistent with these findings, mice with loss of function mutation in PRSS56 or MFRP exhibit a reduction in ocular axial length. However, the molecular network and cellular processes involved in PRSS56- and MFRP-mediated ocular axial growth remain elusive. Here, we show that Adamts19 expression is significantly upregulated in the retina of mice lacking either Prss56 or Mfrp. Importantly, using genetic mouse models, we demonstrate that while ADAMTS19 is not required for ocular growth during normal development, its inactivation exacerbates ocular axial length reduction in Prss56 and Mfrp mutant mice. These results suggest that the upregulation of retinal Adamts19 is part of an adaptive molecular response to counteract impaired ocular growth. Using a complementary genetic approach, we show that loss of PRSS56 or MFRP function prevents excessive ocular axial growth in a mouse model of early-onset myopia caused by a null mutation in Irbp, thus, demonstrating that PRSS56 and MFRP are also required for pathological ocular elongation. Collectively, our findings provide new insights into the molecular network involved in ocular axial growth and support a role for molecular crosstalk between the retina and RPE involved in refractive development.


Assuntos
Proteínas ADAMTS/genética , Proteínas do Olho/genética , Olho/metabolismo , Regulação da Expressão Gênica no Desenvolvimento , Redes Reguladoras de Genes , Proteínas de Membrana/genética , Organogênese/genética , Serina Proteases/genética , Proteínas ADAMTS/metabolismo , Animais , Biomarcadores , Olho/embriologia , Olho/crescimento & desenvolvimento , Proteínas do Olho/metabolismo , Imuno-Histoquímica , Proteínas de Membrana/metabolismo , Camundongos , Camundongos Knockout , Camundongos Transgênicos , Mutação , Proteínas de Ligação ao Retinol/genética , Serina Proteases/metabolismo , Transdução de Sinais
8.
Invest Ophthalmol Vis Sci ; 61(8): 40, 2020 07 01.
Artigo em Inglês | MEDLINE | ID: mdl-32721021

RESUMO

Purpose: The pathophysiologic relationship between vitamin K and glaucoma remains largely unknown. The aim of the study was to explore the effect of dietary vitamin K supplementation in a rat glaucoma model. Methods: Rats were randomly divided into two groups: standard diet and high vitamin K1 (VitK1) diet (300 mg VitK1/kg diet). Induction of chronic ocular hypertension by episcleral vein cauterization was performed on the right eye. The left eye with sham operation served as controls. Rats received standard or high VitK1 diets for 5 weeks after surgery until the end of experiment. Immunohistochemistry analyses of the retina and trabecular meshwork were performed. The change in coagulation function and IOP were evaluated. Results: We observed a significant declined IOP at 2 weeks after surgery in the high VitK1 group compared with the control group. High VitK1 showed no significant effect on the body weight, rat phenotypes, or coagulation function. High VitK1 significantly inhibited the loss of retinal ganglion cells in the retina and increased the expression of matrix gla protein. High VitK1 also ameliorated the collapsed trabecular meshwork structure and increased collagen staining in the trabecular meshwork. Conclusions: High VitK1 intake inhibited the loss of retinal ganglion cells during glaucomatous injury, probably by increasing the expression of matrix gla protein. A transient decrease in the IOP was observed in the high VitK1 group, implying a potential effect of VitK1 on aqueous outflow. Retinal ganglion cells protection by high VitK1 supplementation may be due to the IOP-lowering effects as well as neuroprotective effect. Further research is required to delineate these processes.


Assuntos
Coagulação Sanguínea/efeitos dos fármacos , Hipertensão Ocular , Células Ganglionares da Retina , Malha Trabecular , Vitamina K 1 , Animais , Proteínas de Ligação ao Cálcio/metabolismo , Suplementos Nutricionais , Proteínas da Matriz Extracelular/metabolismo , Imuno-Histoquímica , Fármacos Neuroprotetores , Hipertensão Ocular/diagnóstico , Hipertensão Ocular/dietoterapia , Ratos , Células Ganglionares da Retina/efeitos dos fármacos , Células Ganglionares da Retina/metabolismo , Malha Trabecular/efeitos dos fármacos , Malha Trabecular/metabolismo , Resultado do Tratamento , Vitamina K 1/administração & dosagem , Vitamina K 1/metabolismo , Vitaminas/administração & dosagem , Vitaminas/metabolismo , Proteína de Matriz Gla
9.
Org Lett ; 22(1): 257-260, 2020 01 03.
Artigo em Inglês | MEDLINE | ID: mdl-31860319
10.
Curr Med Sci ; 38(2): 222-228, 2018 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-30074179

RESUMO

Finding the novel drug from the effective components of traditional Chinese herbal medicine is a hotspot of the modern pharmacological research. Hyperoside (HYP) belongs to flavonoid glycosides, and it has various properties, such as anti-inflammation, anti-spasm, anti-diuretic, antitussive, lowering blood pressure, and lowering cholesterol effects as well as protective effects for the cardiac and cerebral blood vessels. The purpose of this study was to investigate the effects of HYP on inflammatory and apoptotic responses in vascular endothelial cells stimulated by lipopolysaccharide (LPS) and further to identify the possible mechanisms underlying these effects. In our study, human umbilical vein endothelial cells (HUVECs) were stimulated with 1 µg/mL LPS in the presence or absence of HYP (10, 20 and 50 µmol/L). Our results indicated that HYP alone exerted no cytotoxicity on HUVECs, while it had an up-regulatory effect on the viability of HUVECs induced by LPS in a dose-dependent manner; increased mRNA expression of IL-1ß, IL-6, TNFα and iNOS induced by LPS was attenuated after treatment with HYP both in a dose-and time-dependent manner; LPS-induced HUVECs apoptosis and cleaved-caspase 8, 9, 3 were all significantly reduced by HYP. Furthermore, the possible pathway involved in apoptosis and inflammation by HYP was detected, and the results showed that when treated with HYP, LPS-induced mitochondrial membrane instability was significantly inhibited through up-regulation of Bcl-2 and down-regulation of Bax. Furthermore, the expression of TLR4 and the phosphorylation of IκBα and p65 in LPS-treated cells were blocked by HYP. Our results suggested that HYP treatment prevented HUVECs from LPSinduced inflammation and apoptosis responses, which might be mediated by inhibiting TLR4/NFκB pathway.


Assuntos
Apoptose , Células Endoteliais da Veia Umbilical Humana/patologia , Inflamação/induzido quimicamente , Inflamação/tratamento farmacológico , Quercetina/análogos & derivados , Apoptose/efeitos dos fármacos , Sobrevivência Celular/efeitos dos fármacos , Citocinas/metabolismo , Células Endoteliais da Veia Umbilical Humana/efeitos dos fármacos , Humanos , Inflamação/genética , Inflamação/patologia , Mediadores da Inflamação/metabolismo , Lipopolissacarídeos , Modelos Biológicos , NF-kappa B/metabolismo , Quercetina/farmacologia , Quercetina/uso terapêutico , RNA Mensageiro/genética , RNA Mensageiro/metabolismo , Receptor 4 Toll-Like/metabolismo
11.
Colloids Surf B Biointerfaces ; 172: 51-59, 2018 Dec 01.
Artigo em Inglês | MEDLINE | ID: mdl-30134219

RESUMO

Curcumin a component of turmeric, which is derived from Curcuma longa is used as a colouring agent and as a dietary spice for centuries. Extensive studies have been done on the anti-inflammatory activity of curcumin along with its molecular mechanism involving different signalling pathways. However, the physicochemical and biological properties such as poor solubility and rapid metabolism of curcumin have led to low bioavailability and hence limits its application. Current therapies for asthma such as bronchodilators and inhaled corticosteroids (ICS) are aimed at controlling disease symptoms and prevent asthma exacerbation. However, this approach requires lifetime therapy and is associated with a constellation of side effects. This creates a clear unmet medical need and there is an urgent demand for new and more-effective treatments. The present study is aimed to formulate liposomes containing curcumin and evaluate for its anti-inflammatory effects on lipopolysaccharide (LPS)-induced inflammation on BCi-NS1.1 cell line. Curcumin and salbutamol liposomes were formulated using lipid hydration method. The prepared liposomes were characterized in terms of particle size, zeta potential, encapsulation efficiency and in-vitro release profile. The liposomes were tested on BCI-NS1.1 cell line to evaluate its anti-inflammatory properties. The various pro-inflammatory markers studied were Interleukin-6 (IL-6), Interleukin-8 (IL-8), Interleukin-1ß (IL-1ß) and Tumour Necrosis Factor-a (TNF-a). Additionally, molecular mechanics simulations were used to elucidate the positioning, energy minimization, and aqueous dispersion of the liposomal architecture involving lecithin and curcumin. The prepared curcumin formulation showed an average size and zeta potential of 271.3 ± 3.06 nm and -61.0 mV, respectively. The drug encapsulation efficiency of liposomal curcumin is 81.1%. Both curcumin-loaded liposomes formulation (1 µg/mL, 5 µg/mL) resulted in significant (p < 0.05) reduction in the level of pro-inflammatory marker expression such as IL-6, IL-8, IL-1ß and TNF-a compared to positive control group. Liposomal curcumin with the dose of 1 µg/mL reduced the inflammatory markers more effectively compared to that of 5 µg/mL. Liposomal curcumin could be a promising intervention for asthma therapy showing their efficacy in suppressing the important pro-inflammatory markers involved in the pathogenesis of asthma.


Assuntos
Asma/tratamento farmacológico , Curcumina/uso terapêutico , Asma/patologia , Biomarcadores/metabolismo , Linhagem Celular , Simulação por Computador , Curcumina/química , Liberação Controlada de Fármacos , Humanos , Inflamação/patologia , Lipossomos , Modelos Moleculares , Tamanho da Partícula , Espectroscopia de Infravermelho com Transformada de Fourier , Eletricidade Estática
12.
Eur J Neurosci ; 41(3): 285-92, 2015 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-25388865

RESUMO

The ability of the auditory system to resolve sound temporal information is crucial for the understanding of human speech and other species-specific communications. Gap detection threshold, i.e. the ability to detect the shortest duration of a silent interval in a sound, is commonly used to study the auditory temporal resolution. Behavioral studies in humans and rats have shown that normal developing infants have higher gap detection thresholds than adults; however, the underlying neural mechanism is not fully understood. In the present study, we determined and compared the neural gap detection thresholds in the primary auditory cortex of three age groups of rats: the juvenile group (postnatal day 20-30), adult group I (8-10 weeks), and adult group II (28-30 weeks). We found age-related changes in auditory temporal acuity in the auditory cortex, i.e. the proportion of cortical units with short neural gap detection thresholds (< 5 ms) was much lower in juvenile groups compared with that in both adult groups at a constant sound level, and no significant differences in neural gap detection thresholds were found between the two adult groups. In addition, units in the auditory cortex of each group generally showed better gap detection thresholds at higher sound levels than at lower sound levels, exhibiting a level-dependent temporal acuity. These results provided evidence for neural correlates of age-related changes in behavioral gap detection ability during postnatal hearing development.


Assuntos
Córtex Auditivo/crescimento & desenvolvimento , Córtex Auditivo/fisiologia , Percepção Auditiva/fisiologia , Detecção de Sinal Psicológico/fisiologia , Estimulação Acústica/métodos , Potenciais de Ação , Envelhecimento/fisiologia , Animais , Potenciais Evocados Auditivos , Microeletrodos , Ratos Sprague-Dawley , Percepção do Tempo/fisiologia
13.
Zhong Yao Cai ; 38(5): 992-4, 2015 May.
Artigo em Chinês | MEDLINE | ID: mdl-26767294

RESUMO

OBJECTIVE: To further reveal the chemical constituents of Polypodium hastatum, volatile components from this plant were investigated. METHODS: The volatile components were extracted under reflux from the whole plant of Polypodium hastatum, and then analyzed qualitatively and quantitatively by GC-MS. RESULTS: 60 volatile components were detected and of all components detected, the structures and relative contents of 34 volatile compounds were elucidated. CONCLUSION: In the volatile components identified, most are fatty acid esters, especially methyl and ethyl esters, which compose the major volatile chemical constituents of Polypodium hastatum.


Assuntos
Óleos Voláteis/química , Óleos de Plantas/química , Polypodium/química , Ácidos Graxos , Cromatografia Gasosa-Espectrometria de Massas
14.
Artigo em Inglês | MEDLINE | ID: mdl-25477996

RESUMO

Background. Acupuncture has been shown to reduce spasticity and prevent the onset of spasticity after stroke. The purpose of this study is to assess the effect of "Deqi" during needling "Wang's Jiaji" acupoints treating spasticity in the early stage of stroke. Methods. This study is a multicenter, prospective, randomized, controlled trial. 238 patients with stroke (<21 days) participated and were randomly allocated to the verum-acupuncture (n = 121) group or sham-acupuncture group (n = 117). The verum-acupuncture group received verum acupuncture required to produce the sense of "Deqi" while the sham-acupuncture group received sham acupuncture without "Deqi." Patients in both groups followed the same 30 min acupuncture regimen 5 times per week for a period of 4 weeks. Scales of MAS, FMA, ADL, MBI, NIHSS, SS-QOL, and MRS were measured at baseline and at 2, 4, and 12 weeks after intervention. Results. Significant differences were observed between two groups. The MRS rating composition has the statistical difference after 4 weeks (P = 0.017). The score of MAS, FMA, Barthel, and SSQOL in verum-acupuncture group has increased significantly compared with the sham-acupuncture group after 12 weeks. There was 14% reduction of higher muscle tension in the verum-acupuncture group. Conclusion. Acupuncture "Wang's Jiaji" points with sensation of "Deqi" in the early stage may reduce the occurrence and decrease the severity of spasticity after stroke.

15.
Chinese Medical Journal ; (24): 3732-3737, 2014.
Artigo em Inglês | WPRIM | ID: wpr-240694

RESUMO

<p><b>BACKGROUND</b>Percutaneous coronary intervention (PCI) could develop periprocedural myocardial infarction and inflammatory response and statins can modify inflammatory responses property. The aim of this study was to evaluate whether short-term high-dose atorvastatin therapy can reduce inflammatory response and myocardial ischemic injury elicited by PCI.</p><p><b>METHODS</b>From March 2012 to May 2014, one hundred and sixty-five statin-naive patients with unstable angina referred for PCI at Department of Cardiology of the 306th Hospital, were enrolled and randomized to 7-day pretreatment with atorvastatin 80 mg/d as high dose group (HD group, n = 56) or 20 mg/d as normal dose group (ND group, n = 57) or an additional single high loading dose (80 mg) followed 6-day atorvastatin 20 mg/d as loading dose group (LD group, n = 52). Plasma C-reactive protein (CRP) and interleukin-6 (IL-6) levels were determined before intervention and at 5 minutes, 24 hours, 48 hours, 72 hours, and 7 days after intervention. Creatine kinase-myocardial isoenzyme (CK-MB) and cardiac troponin I (cTnI) were measured at baseline and then 24 hours following PCI.</p><p><b>RESULTS</b>Plasma CRP and IL-6 levels increased from baseline after PCI in all groups. CRP reached a maximum at 48 hours and IL-6 level reached a maximum at 24 hours after PCI. Plasma CRP levels at 24 hours after PCI were significantly lower in the HD group ((9.14±3.02) mg/L) than in the LD group ((11.06±3.06) mg/L) and ND group ((12.36±3.08) mg/L, P < 0.01); this effect persisted for 72 hours. IL-6 levels at 24 hours and 48 hours showed a statistically significant decrease in the HD group ((16.19±5.39) ng/L and (14.26±4.12) ng/L, respectively)) than in the LD group ((19.26±6.34) ng/L and (16.03±4.08) ng/L, respectively, both P < 0.05) and ND group ((22.24±6.98) ng/L and (17.24±4.84) ng/L, respectively). IL-6 levels at 72 hours and 7 days showed no statistically significant difference among the study groups. Although PCI caused a significant increase in CK-MB and cTnI at 24 hours after the procedure in all groups, the elevated CK-MB and cTnI values were lower in the HD group ((4.71±4.34) ng/ml and (0.086±0.081) ng/ml, respectively) than in the ND group ((7.24±6.03) ng/ml and (0.138±0.103) ng/ml, respectively, both P < 0.01) and LD group ((6.80±5.53) ng/ml and (0.126±0.101) ng/ml, respectively, both P < 0.01).</p><p><b>CONCLUSION</b>Short-term high-dose atorvastatin treatment before PCI significantly reduced systemic inflammatory response and myocardial ischemic injury elicited by PCI.</p>


Assuntos
Idoso , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Angina Instável , Terapêutica , Atorvastatina , Usos Terapêuticos , Traumatismo por Reperfusão Miocárdica , Tratamento Farmacológico , Miocárdio , Patologia , Intervenção Coronária Percutânea , Síndrome de Resposta Inflamatória Sistêmica , Tratamento Farmacológico , Resultado do Tratamento
16.
Int J Mol Med ; 32(6): 1273-80, 2013 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-24064570

RESUMO

It is not clear whether pseudoallergic reactions are caused by similar mechanisms as type I allergic reactions. 3­Caffeoylquinic acid (chlorogenic acid) is an active ingredient in traditional Chinese medicines used for antibacterial, anti-inflammatory and cholagogic purposes. It is assumed to be the reason for the high allergic reaction rates associated with certain traditional Chinese medicine injection solutions. The aim of the present study was to investigate the possible mechanisms through which chlorogenic acid triggers pseudoallergic reactions. The fluidity of the cell membrane was investigated using fluorescence recovery after photobleaching. Western blot analysis was used to measure the phosphorylation levels of the Spleen tyrosine kinase (Syk) protein and Fluo­3/AM fluorescent probes were used to investigate the influx of calcium ions. In addition, fluorescence microscopy and phalloidin were used to determine F­actin depolymerization levels. The secretion rate of ß­hexosaminidase by RBL­2H3 cells clearly increased following treatment with chlorogenic acid and the levels of cytoskeletal disintegration were also markedly increased. Furthermore, we detected an increase in the intracellular calcium ion concentration along with distinct changes in Syk protein phosphorylation and cellular F­actin. These changes indicated that chlorogenic acid affected the restructuring of the cytoskeleton and played a role in cell degranulation. In conclusion, chlorogenic acid may lead to the aggregation of lipid rafts on the cell membrane surface by altering RBL­2H3 cell membrane fluidity, thus triggering Syk­related signal transduction and inducing a truncated type I like allergic reaction.


Assuntos
Basófilos/citologia , Membrana Celular/metabolismo , Ácido Clorogênico/farmacologia , Hipersensibilidade/patologia , Fluidez de Membrana/efeitos dos fármacos , Compostos de Anilina/metabolismo , Animais , Basófilos/efeitos dos fármacos , Basófilos/enzimologia , Basófilos/ultraestrutura , Western Blotting , Cálcio/metabolismo , Linhagem Celular , Membrana Celular/efeitos dos fármacos , Membrana Celular/ultraestrutura , Ácido Clorogênico/análogos & derivados , Corantes Fluorescentes/metabolismo , Hipersensibilidade/enzimologia , Peptídeos e Proteínas de Sinalização Intracelular/metabolismo , Íons , Fosforilação/efeitos dos fármacos , Proteínas Tirosina Quinases/metabolismo , Ratos , Quinase Syk , Xantenos/metabolismo , beta-N-Acetil-Hexosaminidases/metabolismo
17.
Mol Pain ; 9: 18, 2013 Apr 03.
Artigo em Inglês | MEDLINE | ID: mdl-23551937

RESUMO

BACKGROUND: Electroacupuncture (EA) is effective in relieving pain in patients with postherpetic neuralgia (PHN). However, the mechanism underlying the therapeutic effect of EA in PHN is still unclear. Systemic injection of resiniferatoxin (RTX), an ultrapotent analog of TRPV1 agonist, in adult rats can reproduce the clinical symptoms of PHN by ablating TRPV1-expressing sensory neurons. In this study, we determined the beneficial effect of EA and the potential mechanisms in this rat model of PHN. METHODS: PHN was induced in rats by a single injection of RTX. Thermal hyperalgesia was tested with a radiant heat stimulus, and mechanical allodynia was quantified with von Frey filaments. TRPV1 receptors were shown by using immunofluorescence labeling. The ultrastructural changes of the sciatic nerve were assessed by electron microscopic examination. The sprouting of myelinated primary afferent terminals into the spinal dorsal horn was mapped by using the transganglionic tracer cholera toxin B-subunit (CTB). RESULTS: RTX injection diminished thermal sensitivity and gradually induced tactile allodynia within 3 weeks. EA applied to GB30 and GB34 at 2 and 15 Hz, but not 100 Hz, significantly increased the thermal sensitivity 4 weeks after treatment and decreased the tactile allodynia 2 weeks after treatment in RTX-treated rats. EA treatment at 2 and 15 Hz recovered the loss of TRPV1-positive dorsal root ganglion neurons and their central terminals of afferent fibers in the spinal superficial dorsal horn of RTX-treated rats. Moreover, EA significantly reduced the loss of unmyelinated fibers and the damage of the myelinated nerve fibers of RTX-treated rats. Furthermore, EA at 2 and 15 Hz inhibited the sprouting of myelinated primary afferent terminals into the spinal lamina II of RTX-treated rats. CONCLUSIONS: EA treatment improves thermal perception by recovering TRPV1-positive sensory neurons and nerve terminals damaged by RTX. EA Also reduces RTX-induced tactile allodynia by attenuating the damage of myelinated afferent nerves and their abnormal sprouting into the spinal lamina II. Our study provides new information about the mechanisms of the therapeutic actions of EA in the treatment of PHN.


Assuntos
Eletroacupuntura , Hiperalgesia/patologia , Hiperalgesia/terapia , Neuralgia Pós-Herpética/patologia , Neuralgia Pós-Herpética/terapia , Temperatura , Animais , Toxina da Cólera/metabolismo , Modelos Animais de Doenças , Diterpenos , Gânglios Espinais/metabolismo , Gânglios Espinais/patologia , Masculino , Bainha de Mielina/metabolismo , Neurônios Aferentes/metabolismo , Neurônios Aferentes/patologia , Células do Corno Posterior/metabolismo , Células do Corno Posterior/patologia , Subunidades Proteicas/metabolismo , Ratos , Ratos Sprague-Dawley , Nervo Isquiático/patologia , Nervo Isquiático/ultraestrutura , Canais de Cátion TRPV/metabolismo , Fatores de Tempo
18.
Zhongguo Zhong Xi Yi Jie He Za Zhi ; 33(11): 1507-14, 2013 Nov.
Artigo em Chinês | MEDLINE | ID: mdl-24483112

RESUMO

OBJECTIVE: To establish a new disease-syndrome-symptom integrated diarrhea-predominant irritable bowel syndrome (IBS-D) rat model of Gan stagnation and Pi deficiency syndrome (GSPDS). METHODS: (1) The model establishment method: We combined mother-infant separation, chronic restraint, and senna gavage to establish a new IBS-D model of GSPDS. Totally 48 experimental rats were divided into the normal group (Group A), the mother-infant separation group (Group B), the chronic restraint group (Group C), and the senna gavage group (Group D), the mother-infant separation + senna gavage group (Group E), and the mother-infant separation + chronic restraint + senna gavage group (Group F), 8 in each group. (2) The model evaluation method: We used pain threshold indicating colorectal distension to represent for the visceral sensitivity, thus evaluating the establishment of "disease" model; open field test and serum D-xylose levels to evaluate the establishment of GSPDS model; defecation numbers of grain and loose stool rate to evaluate the establishment of diarrhea symptom. RESULTS: (1) Compared with Group A, the body weight gained less in Group F, showing statistical difference (P < 0.05). (2) The pain threshold significantly decreased in Group F, showing statistical difference when compared with Group A (P < 0.05). (3) Compared with Group A, the total cross number, the standing number, and the decoration number in Group F significantly decreased (P < 0.05). (4) Compared with Group A, the serum D-xylose level of Group F significantly decreased (P < 0.05). (5) Compared with Group A, the defecation numbers of grain and the loose stool rate significantly increased, showing statistical difference (P < 0.05). CONCLUSIONS: A new disease-syndrome-symptom integrated IBS-D animal model of GSPDS successfully established might be a better animal model used for studying IBS by Chinese medicine. However, further studies are needed.


Assuntos
Diarreia/diagnóstico , Modelos Animais de Doenças , Síndrome do Intestino Irritável/diagnóstico , Medicina Tradicional Chinesa , Animais , Animais Recém-Nascidos , Feminino , Gravidez , Ratos , Ratos Sprague-Dawley
19.
Zhongguo Zhen Jiu ; 33(11): 970-4, 2013 Nov.
Artigo em Chinês | MEDLINE | ID: mdl-24494280

RESUMO

OBJECTIVE: To assess the clinical efficacy on post-stroke shoulder-hand syndrome (SHS) treated with acupuncture and rehabilitation and the impacts on patients' nailfold microcirculation. METHODS: One hundred and twenty patients were randomized into an acupuncture rehabilitation group and a simple rehabilitation group, 60 cases in each one. In the simple rehabilitation group, OT (comprehensive rehabilitation therapy) training was adopted. In the acupuncture rehabilitation group, on the basis of the treatment as the simple rehabilitation, acu puncture was added at Taiyuan (LU 9), Zusanli (ST 36), Xuanzhong (GB 39), Waiguan (TE 5), Shousanli (LI 10), Quchi (LI 11) and Jianyu (LI 15). Acupuncture was given once a day, 7 days made one session. Totally, 4 sessions of treatment were required. Fugl-Meyer score, upper limb pain score, the score of nerve function defect and the items of nailfold microcirculation of patients were assessed in the the two groups before and after treatment. The efficacy was compared between the two groups. RESULTS: (1) The upper limb pain, the systematic motor function of the upper limbs, the nerve function defect, nailfold microcirculation and clinical symptoms were all improved after treatment in either the acupuncture rehabilitation group or the simple rehabilitation group as compared with those before treatment, indicating the significant difference (P<0. 05, P<0. 01). (2) The im provements in the upper limb pain (0. 90+/-0.71 vs 1. 80+/-0. 66), the systematic motor function of the upper limbs (42. 43 13. 57 vs 29. 98+/-15. 11), the nerve function defect (8. 60+/-11. 61 vs 13. 0+/-1. 74), nailfold microcirculation (total score 3. 18+/-1.32 vs 4.34+/-1.23) and clinical symptoms in the acupuncture rehabilitation group after treatment were different significantly as compared with those in the simple rehabilitation group (PO0. 05,P-O. 01), and the results in the acupuncture rehabilitation group were superior to the simple rehabilitation group. (3) In the acupuncture rehabilitation group, the markedly effective rate was 50. 0% (30/60) and the total effective rate was 93.3% (56/60), which was better than 16.7% (10/60) and 63. 3% (38/60) respectively in the simple rehabilitation group (all P<0. 05). CONCLUSION: Both the combined therapy of acupuncture and rehabilitation and the simple rehabilitation training are effective in the treatment of post-stroke SHS, and promote the status of nailfold microcirculation, the efficacy of the combined therapy is better than that of the latter.


Assuntos
Terapia por Acupuntura , Distrofia Simpática Reflexa/reabilitação , Distrofia Simpática Reflexa/terapia , Acidente Vascular Cerebral/complicações , Pontos de Acupuntura , Idoso , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Distrofia Simpática Reflexa/etiologia , Resultado do Tratamento
20.
BMC Complement Altern Med ; 12: 216, 2012 Nov 12.
Artigo em Inglês | MEDLINE | ID: mdl-23145765

RESUMO

BACKGROUND: Stroke is one of the leading causes of death and disability in China. Current treatments for stroke are limited and achieve no optimal effect. Acupuncture is widely used in the treatment of stroke and in improving the quality of life for patients in China. In most previous clinical studies, the effects of acupuncture have been diverse, and few well-designed randomized controlled trials have been conducted to investigate the long-term effect of acupuncture on acute stroke recovery. METHOD: Three hundred and twenty eight subjects with acute cerebral apoplexy will be recruited. The patients will be randomized into two different groups: the intervention group will receive acupuncture treatment together with Western standard treatment for 2 weeks plus the secondary prevention treatment for 22 weeks; the control group will receive only the Western standard treatment for 2 weeks and the secondary prevention treatment for 22 weeks. The primary outcome measures are Barthel Index and the Stroke-Specific Quality Of Life. The secondary outcome measures are the National Institutes of Health Stroke Scale and Modified Rankin Scale. All assessments will be conducted at the baseline and at weeks 4, 12 and 24 of follow-up. DISCUSSION: This study will evaluate the effects of acupuncture on the long-term recovery of acute stroke and on improving the quality of life of the patients. The results of this study will help establish optimal integrated therapeutic strategies for patients with stroke. TRIAL REGISTRATION: Current Controlled Trials ISRCTN29932220.


Assuntos
Terapia por Acupuntura , Acidente Vascular Cerebral/terapia , Adulto , Idoso , China , Protocolos Clínicos , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Qualidade de Vida
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