RESUMO
Fecal incontinence is a refractory disease in colorectal surgery. The main clinical manifestation is that patients cannot control the discharge of gas, solid or liquid feces in the rectum autonomously. It is easy to bring shame to patients and seriously affect their physical and mental health. Reducing the frequency of fecal incontinence, restoring anal sphincter function, and improving patient quality of life are important goals for treating fecal incontinence. With the development of medical technology and the improvement of treatment plans for fecal incontinence, patients with fecal incontinence usually undergo conservative treatment first, and if conservative treatment is ineffective, surgery can be chosen. Non-surgical treatment methods commonly used in clinical practice include biofeedback therapy, magnetic stimulation therapy, pelvic floor muscle training, anal sphincter training, Kegel training, and other rehabilitation treatments. This article discusses the non-surgical treatment methods for fecal incontinence, hoping to provide a choice for clinical treatment of fecal incontinence.
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Incontinência Fecal , Humanos , Incontinência Fecal/cirurgia , Qualidade de Vida , Diafragma da Pelve/cirurgia , Terapia por Exercício/métodos , Biorretroalimentação Psicológica/métodos , Canal Anal/cirurgiaRESUMO
Objective: To verify the efficacy and safety of daily oral minodronate in postmenopausal women with established osteoporosis. Methods: In this randomized, double-blinded, placebo-controlled trial, 262 postmenopausal women were enrolled. Patients were randomized to receive daily oral minodronate 1 mg with supplements of 500 mg calcium and 200 U vitamin D3 (n=130) or placebo (n=132) with daily supplements of 500 mg calcium and 200 U vitamin D3, for 48 weeks. The primary endpoint was the average bone mineral density (BMD) change in the lumbar vertebrae 48 weeks post-treatment. Secondary outcome measures was the incidence of vertebral fractures. Safety assessments included the rate of adverse events. Results: At the end of 48 weeks treatment, the average BMD change rate from baseline were: full analysis set results: (3.52±4.82)% in the minodronate group and (2.00±5.74)% in the placebo group; per-protocol set results: (3.99±5.05)% in the minodronate group and (2.07±6.20)% in the placebo group; the differences were all significant (all P<0.05). Vertebral fracture occured in 3 patients (2.3%, 3/132) in the placebo group, and 1 case (0.8%, 1/130) in the minodronate group (P>0.05). The incidence of adverse events was 71.5% (93/130) in the minodronate group and 78.0% (103/132) in the placebo group (P>0.05). Conclusion: Minodronate is effective and safe in the treatment of postmenopausal osteoporosis without severe side effects.
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Conservadores da Densidade Óssea , Osteoporose Pós-Menopausa , Osteoporose , Fraturas da Coluna Vertebral , Densidade Óssea , Conservadores da Densidade Óssea/efeitos adversos , Cálcio/farmacologia , Cálcio/uso terapêutico , China , Difosfonatos , Método Duplo-Cego , Feminino , Humanos , Imidazóis , Osteoporose/induzido quimicamente , Osteoporose/complicações , Osteoporose/tratamento farmacológico , Osteoporose Pós-Menopausa/induzido quimicamente , Osteoporose Pós-Menopausa/complicações , Osteoporose Pós-Menopausa/tratamento farmacológico , Pós-Menopausa , Fraturas da Coluna Vertebral/complicações , Fraturas da Coluna Vertebral/epidemiologia , Fraturas da Coluna Vertebral/prevenção & controle , Comprimidos/farmacologia , Comprimidos/uso terapêutico , Resultado do Tratamento , Vitamina D/farmacologia , Vitamina D/uso terapêuticoRESUMO
Rosa (Rosaceae) is an important ornamental and medicinal plant genus worldwide, with several species being cultivated in China. Members of Sporocadaceae (pestalotioid fungi) are globally distributed and include endophytes, saprobes but also plant pathogens, infecting a broad range of host plants on which they can cause important plant diseases. Although several Sporocadaceae species were recorded to inhabit Rosa spp., the taxa occurring on Rosa remain largely unresolved. In this study, a total of 295 diseased samples were collected from branches, fruits, leaves and spines of eight Rosa species (R. chinensis, R. helenae, R. laevigata, R. multiflora, R. omeiensis, R. rugosa, R. spinosissima and R. xanthina) in Gansu, Henan, Hunan, Qinghai, Shaanxi Provinces and the Ningxia Autonomous Region of China. Subsequently 126 strains were obtained and identified based on comparisons of DNA sequence data. Based on these results 15 species residing in six genera of Sporocadaceae were delineated, including four known species (Pestalotiopsis chamaeropis, Pes. rhodomyrtus, Sporocadus sorbi and Spo. trimorphus) and 11 new species described here as Monochaetia rosarum, Neopestalotiopsis concentrica, N. subepidermalis, Pestalotiopsis tumida, Seimatosporium centrale, Seim. gracile, Seim. nonappendiculatum, Seim. parvum, Seiridium rosae, Sporocadus brevis, and Spo. spiniger. This study also represents the first report of Pes. chamaeropis, Pes. rhodomyrtus and Spo. sorbi on Rosa. The overall data revealed that Pestalotiopsis was the most prevalent genus, followed by Seimatosporium, while Pes. chamaeropis and Pes. rhodomyrtus were the two most prevalent species. Analysis of Sporocadaceae abundance on Rosa species and plant organs revealed that spines of R. chinensis had the highest species diversity. Citation: Peng C, Crous PW, Jiang N, et al. 2022. Diversity of Sporocadaceae (pestalotioid fungi) from Rosa in China. Persoonia 49: 201-260. https://doi.org/10.3767/persoonia.2022.49.07.
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Nickel nanoparticles (Ni-NPs) have been widely used in various industries related to electronics, ceramics, textiles, and nanomedicine. Ambient and occupational exposure to Ni-NPs may bring about potential detrimental effects on animals and humans. Thus, there is a growing effort to identify compounds that can ameliorate NPs-associated pathophysiologies. The present study examined Cinnamomum cassia (C. cassia) bark extracts (CMBE) for its ameliorative activity against Ni-NPs-induced pathophysiological and histopathological alterations in male Sprague Dawley rats. The biochemical analyses revealed that dosing rats with Ni-NPs at 10 mg/kg/body weight (b.w.) significantly altered the normal structural and biochemical adaptations in the liver and kidney. Conversely, supplementations with CMBE at different doses (225, 200, and 175 mg/kg/b.w. of rat) ameliorated the altered blood biochemistry and reduced the biomarkers of liver and kidney function considerably (p < 0.05) in a dose-dependent manner. However, the best results were at 225 mg/kg/b.w. of rat. The study provided preliminary information about the protective effect of C. cassia against Ni-NPs indicated liver and kidney damages. Future investigations are needed to explore C. cassia mechanism of action and isolation of single constituents of C. cassia to assess their pharmaceutical importance accordingly.
Assuntos
Cinnamomum aromaticum , Rim/efeitos dos fármacos , Fígado/efeitos dos fármacos , Nanopartículas Metálicas/toxicidade , Níquel/toxicidade , Extratos Vegetais/uso terapêutico , Substâncias Protetoras/uso terapêutico , Animais , Catalase/metabolismo , Glutationa/metabolismo , Rim/metabolismo , Rim/patologia , Peróxidos Lipídicos/metabolismo , Fígado/metabolismo , Fígado/patologia , Masculino , Malondialdeído/metabolismo , Fitoterapia , Casca de Planta , Extratos Vegetais/farmacologia , Substâncias Protetoras/farmacologia , Ratos Sprague-DawleyRESUMO
OBJECTIVE:: To investigate the therapeutic effect and mechanism of sodium tanshinone IIA sulfate (STS) on paraquat (PQ)-induced myocardial injuries in a rat model. METHODS:: Healthy adult Sprague Dawley rats were randomly divided into normal control, PQ, and PQ + STS groups. PQ group was given a single intragastric administration of PQ (80 mg/kg). PQ + STS group was intraperitoneally injected with STS (1 ml/kg) at 30 min following PQ exposure. Rats in control and PQ groups were injected with equal amount of saline. After 12, 24, 48, and 72 h, rats were killed, and the apoptosis of myocardial cells was detected. Myocardial expression of Bax and Bcl-2 was measured. The activity of the nuclear erythroid 2-related factor 2 (Nrf2) pathway was assessed by Western blot. RESULTS:: The apoptotic cells in PQ group were significantly increased in a time-dependent manner compared with the control group ( p < 0.01). The rats in PQ group exhibited significantly lower Bcl-2 expression, but notably higher Bax expression at 12, 24, 48, and 72 h after PQ exposure ( p < 0.05 or 0.01). STS intervention markedly reduced the proportion of apoptotic myocardial cells, increased Bcl-2 expression, and decreased Bax expression at 24, 48, and 72 h after treatment ( p < 0.05 or 0.01). The expression of phosphorylated Nrf2 and heme oxygenase 1 in PQ + STS group was significantly increased compared with PQ and control groups ( p < 0.05 or 0.01). CONCLUSION:: STS effectively inhibits PQ-induced myocardial cell apoptosis in rats via modulating the Nrf2 pathway, suggesting its potential as a promising therapeutic agent for PQ-induced myocardium damage.
Assuntos
Abietanos/uso terapêutico , Cardiotoxicidade/tratamento farmacológico , Herbicidas/toxicidade , Fator 2 Relacionado a NF-E2/metabolismo , Paraquat/toxicidade , Substâncias Protetoras/uso terapêutico , Abietanos/farmacologia , Animais , Apoptose/efeitos dos fármacos , Cardiotoxicidade/metabolismo , Masculino , Miocárdio/metabolismo , Substâncias Protetoras/farmacologia , Proteínas Proto-Oncogênicas c-bcl-2/fisiologia , Ratos Sprague-Dawley , Transdução de Sinais/efeitos dos fármacosRESUMO
Target leaf spot is a sorghum leaf disease caused by Bipolaris sorghicola, a species of fungus with a global distribution. In this study, we investigated the process by which B. sorghicola invades cells of barley, onion, Arabidopsis thaliana species, and sorghum. The results showed that within 8 h of coming into contact with host cells, the hyphal ends of B. sorghicola expand and form a uniform infective penetration pegbolt-like structure; a primary infection mycelium can be formed inside host cells within 24 h after contact, which can infect closed cells after 48 h. A mycelium can grow within the gap between cells and form infective hyphae. The pathogen infection process was the same in different host cells. B. sorghicola can affect root cells through soil infection, indicating that it may also have characteristics of soil-borne pathogens.
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Ascomicetos/fisiologia , Interações Hospedeiro-Patógeno , Raízes de Plantas/microbiologia , Arabidopsis/microbiologia , Hordeum/microbiologia , Cebolas/microbiologia , Microbiologia do Solo , Sorghum/microbiologiaRESUMO
BACKGROUND: Diminished control of standing balance, traditionally indicated by greater postural sway magnitude and speed, is associated with falls in older adults. Tai Chi (TC) is a multisystem intervention that reduces fall risk, yet its impact on sway measures vary considerably. We hypothesized that TC improves the integrated function of multiple control systems influencing balance, quantifiable by the multi-scale "complexity" of postural sway fluctuations. OBJECTIVES: To evaluate both traditional and complexity-based measures of sway to characterize the short- and potential long-term effects of TC training on postural control and the relationships between sway measures and physical function in healthy older adults. METHODS: A cross-sectional comparison of standing postural sway in healthy TC-naïve and TC-expert (24.5±12 yrs experience) adults. TC-naïve participants then completed a 6-month, two-arm, wait-list randomized clinical trial of TC training. Postural sway was assessed before and after the training during standing on a force-plate with eyes-open (EO) and eyes-closed (EC). Anterior-posterior (AP) and medio-lateral (ML) sway speed, magnitude, and complexity (quantified by multiscale entropy) were calculated. Single-legged standing time and Timed-Up-and-Go tests characterized physical function. RESULTS: At baseline, compared to TC-naïve adults (nâ=â60, age 64.5±7.5 yrs), TC-experts (nâ=â27, age 62.8±7.5 yrs) exhibited greater complexity of sway in the AP EC (Pâ=â0.023), ML EO (P<0.001), and ML EC (P<0.001) conditions. Traditional measures of sway speed and magnitude were not significantly lower among TC-experts. Intention-to-treat analyses indicated no significant effects of short-term TC training; however, increases in AP EC and ML EC complexity amongst those randomized to TC were positively correlated with practice hours (Pâ=â0.044, Pâ=â0.018). Long- and short-term TC training were positively associated with physical function. CONCLUSION: Multiscale entropy offers a complementary approach to traditional COP measures for characterizing sway during quiet standing, and may be more sensitive to the effects of TC in healthy adults. TRIAL REGISTRATION: ClinicalTrials.gov NCT01340365.
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Equilíbrio Postural , Postura , Tai Chi Chuan , Fatores Etários , Idoso , Estudos Transversais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Aptidão Física , Equilíbrio Postural/fisiologia , Postura/fisiologiaRESUMO
BACKGROUND: Tai Chi training enhances physical function and may reduce falls in older adults with and without balance disorders, yet its effect on postural control as quantified by the magnitude or speed of center-of-pressure (COP) excursions beneath the feet is less clear. We hypothesized that COP metrics derived from complex systems theory may better capture the multi-component stimulus that Tai Chi has on the postural control system, as compared with traditional COP measures. METHODS: We performed a secondary analysis of a pilot, non-controlled intervention study that examined the effects of Tai Chi on standing COP dynamics, plantar sensation, and physical function in 25 older adults with peripheral neuropathy. Tai Chi training was based on the Yang style and consisted of three, one-hour group sessions per week for 24 weeks. Standing postural control was assessed with a force platform at baseline, 6, 12, 18, and 24 weeks. The degree of COP complexity, as defined by the presence of fluctuations existing over multiple timescales, was calculated using multiscale entropy analysis. Traditional measures of COP speed and area were also calculated. Foot sole sensation, six-minute walk (6MW) and timed up-and-go (TUG) were also measured at each assessment. RESULTS: Traditional measures of postural control did not change from baseline. The COP complexity index (mean ± SD) increased from baseline (4.1 ± 0.5) to week 6 (4.5 ± 0.4), and from week 6 to week 24 (4.7 ± 0.4) (p=0.02). Increases in COP complexity-from baseline to week 24-correlated with improvements in foot sole sensation (p=0.01), the 6MW (p=0.001) and TUG (p=0.01). CONCLUSIONS: Subjects of the Tai Chi program exhibited increased complexity of standing COP dynamics. These increases were associated with improved plantar sensation and physical function. Although more research is needed, results of this non-controlled pilot study suggest that complexity-based COP measures may inform the study of complex mind-body interventions, like Tai Chi, on postural control in those with peripheral neuropathy or other age-related balance disorders.
Assuntos
Doenças do Sistema Nervoso Periférico/fisiopatologia , Doenças do Sistema Nervoso Periférico/terapia , Equilíbrio Postural , Tai Chi Chuan , Idoso , Idoso de 80 Anos ou mais , Feminino , Humanos , Perna (Membro)/fisiopatologia , Masculino , Pessoa de Meia-Idade , Doenças do Sistema Nervoso Periférico/psicologia , Projetos Piloto , Sensação , Resultado do Tratamento , CaminhadaRESUMO
Selenium is essential for the normal life processes, and all animals, including fish, need this inorganic element. In order to research the pathology of selenium deficiency in common carp, Cyprinus carpio L., 360 juvenile carp were allocated to three treatments. Each treatment containing 120 fish was randomly divided into four groups, fed with purified diets containing selenium at 0, 0.15, 0.30 and 0.45 mg kg(-1). The results indicated that the morbidity and mortality rates of the test groups were negatively correlated with the level of selenium in the diets. The morbidity and mortality rates were, respectively, 46.7%, 33.3%, 13.3%, 0 and 26.7% 16.7%, 6.7%, 0. The affected fish exhibited pathological changes, such as 'thin back disease' and lordosis. Histologically, there was no abnormality observed in muscles, liver and pancreas. Ultrastructurally, there was swelling of the mitochondria of the cardiac muscle cells, the liver cells and renal tubular epithelial cells, with disintegration and lysis of the cristae of the mitochondria which vesiculated. Serum glutamic oxaloacetic transaminase and glutamic pyruvic transaminase levels were increased and the activity of the serum glutathione peroxidase and the serum superoxide dismutase was decreased; in contrast, the serum malonaldehyde concentration was increased.
Assuntos
Carpas/metabolismo , Doenças dos Peixes/patologia , Selênio/deficiência , Animais , Análise Química do Sangue/veterinária , Relação Dose-Resposta a Droga , Doenças dos Peixes/sangue , Doenças dos Peixes/epidemiologia , Lordose/sangue , Lordose/epidemiologia , Lordose/patologia , Lordose/veterinária , Selênio/administração & dosagemRESUMO
INTRODUCTION: Aging is typically associated with progressive multi-system impairment that leads to decreased physical and cognitive function and reduced adaptability to stress. Due to its capacity to characterize complex dynamics within and between physiological systems, the emerging field of complex systems biology and its array of quantitative tools show great promise for improving our understanding of aging, monitoring senescence, and providing biomarkers for evaluating novel interventions, including promising mind-body exercises, that treat age-related disease and promote healthy aging. MATERIAL AND METHODS: An ongoing, two-arm randomized clinical trial is evaluating the potential of Tai Chi mind-body exercise to attenuate age-related loss of complexity. A total of 60 Tai Chi-naïve healthy older adults (aged 50-79) are being randomized to either six months of Tai Chi training (n=30), or to a waitlist control receiving unaltered usual medical care (n=30). Our primary outcomes are complexity-based measures of heart rate, standing postural sway and gait stride interval dynamics assessed at 3 and 6months. Multiscale entropy and detrended fluctuation analysis are used as entropy- and fractal-based measures of complexity, respectively. Secondary outcomes include measures of physical and psychological function and tests of physiological adaptability also assessed at 3 and 6months. DISCUSSION: Results of this study may lead to novel biomarkers that help us monitor and understand the physiological processes of aging and explore the potential benefits of Tai Chi and related mind-body exercises for healthy aging.
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Adaptação Fisiológica , Envelhecimento , Qualidade de Vida , Ensaios Clínicos Controlados Aleatórios como Assunto/métodos , Distúrbios Somatossensoriais/terapia , Tai Chi Chuan/métodos , Idoso , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Distúrbios Somatossensoriais/psicologiaRESUMO
An endogenous probe for CYP3A activity would be useful for early identification of in vivo cytochrome P450 (CYP) 3A4 inhibitors. The aim of this study was to determine whether formation clearance (CL(f)) of the sum of 6ß-hydroxycortisol and 6ß-hydroxycortisone is a useful probe of CYP3A4 inhibition in vivo. In human liver microsomes (HLMs), the formation of 6ß-hydroxycortisol and 6ß-hydroxycortisone was catalyzed by CYP3A4, and itraconazole inhibited these reactions with half maximal inhibitory concentration (IC(50))(,u) values of 3.1 nmol/l and 3.4 nmol/l, respectively. The in vivo IC(50,u) value of itraconazole for the combined CL(f) of 6ß-hydroxycortisone and 6ß-hydroxycortisol was 1.6 nmol/l. The greater inhibitory potency in vivo is probably due to circulating inhibitory itraconazole metabolites. The maximum in vivo inhibition was 59%, suggesting that f(m,CYP3A4) for cortisol and cortisone 6ß-hydroxylation is ~60%. Given the significant decrease in CL(f) of 6ß-hydroxycortisone and 6ß-hydroxycortisol after 200-mg and 400-mg single doses of itraconazole, this endogenous probe can be used to detect moderate and potent CYP3A4 inhibition in vivo.
Assuntos
Cortisona/análogos & derivados , Inibidores do Citocromo P-450 CYP3A , Citocromo P-450 CYP3A/biossíntese , Hidrocortisona/análogos & derivados , Sondas Moleculares/metabolismo , Cortisona/antagonistas & inibidores , Cortisona/metabolismo , Citocromo P-450 CYP3A/metabolismo , Combinação de Medicamentos , Avaliação Pré-Clínica de Medicamentos/métodos , Humanos , Hidrocortisona/antagonistas & inibidores , Hidrocortisona/biossíntese , Hidrocortisona/metabolismo , Itraconazol/metabolismo , Itraconazol/farmacologia , Microssomos Hepáticos/efeitos dos fármacos , Microssomos Hepáticos/enzimologia , Microssomos Hepáticos/metabolismo , Reprodutibilidade dos TestesRESUMO
PURPOSE OF REVIEW: Nausea and vomiting of pregnancy (NVP) affects 90% of pregnant women and its impact is often underappreciated. Hyperemesis gravidarum, the most severe end of the spectrum, affects 0.5-2% of pregnancies. The pathogenesis of this condition remains obscure and its management has largely been empirical. This review aims to provide an update on advances in pregnancy hyperemesis focusing on papers published within the past 2 years. RECENT FINDINGS: The cause of hyperemesis is continuing to be elaborated. Recent data attest to the effectiveness of the oral doxylamine-pyridoxine in NVP. Follow-up data of children exposed in early pregnancy to doxylamine-pyridoxine for NVP are reassuring. Evidence is increasing for ginger as an effective herbal remedy for NVP. Metoclopramide is effective in NVP and hyperemesis gravidarum, with a good balance of efficacy and tolerability. A recent large-scale study on first trimester exposure to metoclopramide is reassuring of its safety. Evidence is emerging for the treatment of acid reflux to ameliorate NVP. The role of corticosteroids for hyperemesis gravidarum remains controversial. Transpyloric feeding may be warranted for persistent weight loss, despite optimal antiemetic therapy. SUMMARY: Women with significant NVP should be identified so that they can be safely and effectively treated.
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Hiperêmese Gravídica/terapia , Complicações na Gravidez/terapia , Corticosteroides/uso terapêutico , Antieméticos , Dieta , Doxilamina/farmacologia , Feminino , Zingiber officinale/metabolismo , Humanos , Hiperêmese Gravídica/diagnóstico , Obstetrícia/métodos , Ondansetron/uso terapêutico , Extratos Vegetais/uso terapêutico , Gravidez , Complicações na Gravidez/diagnóstico , Resultado da Gravidez , Piridoxina/farmacologiaRESUMO
An increased number of thalassaemia patients treated with effective chelation therapy protocols are achieving body iron levels similar to those of normal individuals. Iron chelation therapy has also been recently used in a number of other categories of patients with no excess body iron load such as neurodegenerative, renal and infectious diseases. Chelation therapy in the absence of iron overload in the latter conditions raises many safety issues including chelator overdose toxicity and toxicity related to iron and other essential metal deficiencies. Preliminary preclinical and clinical toxicity evidence suggest that deferoxamine and deferasirox can only be safely used for these non-iron loaded conditions for short-term treatments of a few weeks, whereas deferiprone can be used for longer term treatments of many months. The selection of the chelating drug and appropriate dose protocols for targeting specific organs and conditions is critical for the safety of patients with normal iron stores. Chelation therapy is likely to play a major role as adjuvant, alternative or main therapy in many non-iron loading conditions in the forthcoming years.
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Terapia por Quelação/efeitos adversos , Doenças Transmissíveis , Quelantes de Ferro/efeitos adversos , Nefropatias , Doenças Neurodegenerativas , Talassemia , Ensaios Clínicos como Assunto , Doenças Transmissíveis/sangue , Doenças Transmissíveis/tratamento farmacológico , Humanos , Ferro , Sobrecarga de Ferro/sangue , Sobrecarga de Ferro/tratamento farmacológico , Nefropatias/sangue , Nefropatias/tratamento farmacológico , Doenças Neurodegenerativas/sangue , Doenças Neurodegenerativas/tratamento farmacológico , Valores de Referência , Talassemia/sangue , Talassemia/tratamento farmacológicoRESUMO
Gardenia, the fruit of Gardenia jasminoides Ellis, has been widely used to treat liver and gall bladder disorders in Chinese medicine. It has been shown recently that geniposide, the main ingredient of Gardenia Fructus, exhibits the anti-tumor effect. In this review, we discuss the anti-tumor effect and possible mechanisms of a derivative from Gardenia Fructus, penta-acetyl geniposide ((Ac)5GP). It has been demonstrated that (Ac)5GP plays more potent roles than geniposide in chemoprevention. (Ac)5GP decreased DNA damage and hepatocarcinogenesis induced by aflatoxin B1 (AFB1) by activating the phase II enzymes glutathione S-transferase (GST) and GSH peroxidase (GSH-Px). It reduced the growth and development of inoculated C6 glioma cells especially in pre-treated rats. In addition to the preventive effect, (Ac)5GP exerts its actions on apoptosis and growth arrest. Treatment of (Ac)5GP caused DNA fragmentation of glioma cells. (Ac)5GP induced sub- G1 peak through the activation of apoptotic cascades PKCdelta/JNK/Fas/caspase8 and caspase 3. Besides, p53/Bax signaling was suggested to be involved in (Ac)5GP-induced apoptosis, though its downstream cascades needs further clarified. (Ac)5GP has also been shown to inhibit DNA synthesis of tumor cells. It arrested cell cycle at G0/ G1 by inducing the expression of p21, thus suppressing the cyclin D1/cdk4 complex formation and the phosphorylation of E2F. The phosphorylation status of p53 on serine 392 correlated with the process of growth arrest. Evidences from the in vivo experiments showed that (Ac)5GP is not harmful to liver, heart and kidney. In conclusion, (Ac)5GP is highly suggested to be an anti-tumor agent for development in the future.
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Antineoplásicos/uso terapêutico , Glucosídeos/uso terapêutico , Iridoides/uso terapêutico , Piranos/uso terapêutico , Animais , Antineoplásicos/isolamento & purificação , Frutas/química , Gardenia/química , Glucosídeos/isolamento & purificação , Glucosídeos/metabolismo , Humanos , Glucosídeos Iridoides , Iridoides/isolamento & purificação , Iridoides/metabolismo , Medicina Tradicional Chinesa , Piranos/isolamento & purificação , Piranos/metabolismoRESUMO
OBJECTIVE: This study was designed to quantify and compare the instantaneous heart rate dynamics and cardiopulmonary interactions during sequential performance of three meditation protocols with different breathing patterns. BACKGROUND: We analyzed beat-to-beat heart rate and continuous breathing signals from 10 experienced meditators (4 females; 6 males; mean age 42 years; range 29-55 years) during three traditional interventions: relaxation response, breath of fire, and segmented breathing. RESULTS: Heart rate and respiratory dynamics were generally similar during the relaxation response and segmented breathing. We observed high amplitude, low frequency (approximately 0.05-0.1 Hz) oscillations due to respiratory sinus arrhythmia during both the relaxation response and segmented breathing, along with a significantly (p<0.05) increased coherence between heart rate and breathing during these two maneuvers when compared to baseline. The third technique, breath of fire, was associated with a different pattern of response, marked by a significant increase in mean heart rate with respect to baseline (p<0.01), and a significant decrease in coherence between heart rate and breathing (p<0.05). CONCLUSIONS: These findings suggest that different meditative/breathing protocols may evoke common heart rate effects, as well as specific responses. The results support the concept of a "meditation paradox," since a variety of relaxation and meditative techniques may produce active rather than quiescent cardiac dynamics, associated with prominent low frequency heart rate oscillations or increases in mean resting heart rate. These findings also underscore the need to critically assess traditional frequency domain heart rate variability parameters in making inferences about autonomic alterations during meditation with slow breathing.
Assuntos
Frequência Cardíaca/fisiologia , Meditação , Adulto , Fenômenos Fisiológicos Cardiovasculares , Feminino , Ventilação de Alta Frequência , Humanos , Masculino , Pessoa de Meia-Idade , Variações Dependentes do Observador , Valores de Referência , RespiraçãoRESUMO
The effect of added carbon source and nitrate concentration on the denitrifying phosphorus removal by denitrifying phosphorus removal bacteria sludge was systematically studied using batch experiments, at the same time the variation of ORP was investigated. Results showed that the denitrifying and phosphorus uptake rate in the anoxic phase increased with the high initial anaerobic carbon source addition. However, once the initial COD concentration reached a certain level, which was in excess of the PHB saturation of Poly-p bacteria, residual COD carried over to the anoxic phase inhibited the subsequent denitrifying phosphorus uptake. This was equal to supplementing the external carbon source to the anoxic phase, furthermore the higher the external carbon source concentration the more powerful the inhibition caused. High nitrate concentration in the anoxic phase increased the initial denitrifying phosphorus rate. Oncethe nitrate was exhausted, phosphate uptake changed to phosphate release. Moreover, the time of this turning point occurred later with the higher nitrate addition. On the other hand, through on-line monitoring the variation of the ORP with different initial COD concentration, it was found that ORP could be used as a control parameter for phosphorus release, but it is impossible to utilize ORP for controlling the dinitrification and anoxic phosphorus uptake operations.
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Carbono/metabolismo , Nitratos/metabolismo , Nitritos/metabolismo , Fósforo/isolamento & purificação , Esgotos/microbiologia , Hipóxia/metabolismo , Nitritos/química , Nitrogênio/metabolismo , Oxirredução , Oxigênio/metabolismo , Fosfatos/metabolismo , Fósforo/metabolismo , Esgotos/química , Fatores de Tempo , Poluentes Químicos da Água/isolamento & purificação , Poluentes Químicos da Água/metabolismoRESUMO
From the roots of Aconitum sinomontanum, five new norditerpenoid alkaloids, sinomontanitines A (1) and B (2), sinomontanines A (3), B (4) and C (5), were isolated together with the known alkaloids lappaconitine (6) and ranaconitine (7), The structures of the new alkaloids were determined by spectral analysis.
Assuntos
Aconitina/análogos & derivados , Alcaloides/química , Alcaloides/isolamento & purificação , Diterpenos/química , Diterpenos/isolamento & purificação , Medicamentos de Ervas Chinesas/química , Plantas Medicinais/química , Aconitina/química , Aconitina/isolamento & purificação , Espectroscopia de Ressonância Magnética , Espectrometria de Massas , Estrutura Molecular , Raízes de Plantas/química , Espectrofotometria Infravermelho , Relação Estrutura-AtividadeRESUMO
A new diterpenoid alkaloid, racemulotine (1), was isolated from the whole plants of Aconitum racemulosum Franch var. pengzhouense, and its structure was elucidated by 1D- and 2D-NMR spectra.
Assuntos
Alcaloides/química , Alcaloides/isolamento & purificação , Diterpenos/química , Diterpenos/isolamento & purificação , Medicamentos de Ervas Chinesas/química , Plantas Medicinais/química , Cromatografia em Camada Fina , Concentração de Íons de Hidrogênio , Espectroscopia de Ressonância Magnética , Espectrometria de Massas , Estrutura Molecular , Espectrofotometria Infravermelho , Relação Estrutura-AtividadeRESUMO
Members of the mitogen-activated protein kinase (MAPK) cascade such as extracellular signal-regulated kinase (ERK), c-Jun N-terminal kinase (JNK) and p38 are implicated as important regulators of cardiomyocyte hypertrophic growth in culture. However, the role that individual MAPK pathways play in vivo has not been extensively evaluated. Here we generated nine transgenic mouse lines with cardiac-restricted expression of an activated MEK1 cDNA in the heart. MEK1 transgenic mice demonstrated concentric hypertrophy without signs of cardiomyopathy or lethality up to 12 months of age. MEK1 transgenic mice showed a dramatic increase in cardiac function, as measured by echocardiography and isolated working heart preparation, without signs of decompensation over time. MEK1 transgenic mice and MEK1 adenovirus-infected neonatal cardiomyocytes each demonstrated ERK1/2, but not p38 or JNK, activation. MEK1 transgenic mice and MEK1 adenovirus-infected cultured cardiomyocytes were also partially resistant to apoptotic stimuli. The results of the present study indicate that the MEK1-ERK1/2 signaling pathway stimulates a physiologic hypertrophy response associated with augmented cardiac function and partial resistance to apoptotsis.
Assuntos
Sistema de Sinalização das MAP Quinases , Proteína Quinase 1 Ativada por Mitógeno/metabolismo , Quinases de Proteína Quinase Ativadas por Mitógeno/metabolismo , Proteínas Quinases Ativadas por Mitógeno/metabolismo , Proteínas Serina-Treonina Quinases/metabolismo , Actinina/metabolismo , Adenoviridae/metabolismo , Fatores Etários , Animais , Animais Recém-Nascidos , Apoptose , Peso Corporal , Cardiomegalia/metabolismo , Caspase 3 , Caspases/metabolismo , Células Cultivadas , Fragmentação do DNA , DNA Complementar/metabolismo , Ecocardiografia , Eletroforese em Gel de Poliacrilamida , Imuno-Histoquímica , Marcação In Situ das Extremidades Cortadas , Leucina/metabolismo , MAP Quinase Quinase 1 , Camundongos , Camundongos Transgênicos , Proteína Quinase 3 Ativada por Mitógeno , Proteína Quinase 8 Ativada por Mitógeno , Miocárdio/metabolismo , Tamanho do Órgão , Plasmídeos/metabolismo , RNA/metabolismo , Ratos , Traumatismo por Reperfusão , Reação em Cadeia da Polimerase Via Transcriptase Reversa , Transdução de SinaisRESUMO
The combined method of acupuncture with pressure on otopoints (the combination group) was used to treat 86 patients with facial spasm; and simple acupuncture and simple pressure on otopoints were respectively applied in the other two groups of patients as controls. The total effective rates of the combination group, the acupuncture group and the pressure on otopoints group were 95.4%, 92.1% and 62.5% respectively; and the cure rates were 38.4%, 15.8% and 5% respectively. The differences in results of the three groups show statistically marked significance, indicating that the therapeutic effectiveness of the combined method of acupuncture with pressure on otopoints is better than the other two therapeutic methods.