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1.
J Nat Prod ; 87(1): 132-140, 2024 01 26.
Artículo en Inglés | MEDLINE | ID: mdl-38157445

RESUMEN

Mylnudones A-G (1-7), unprecedented 1,10-seco-aromadendrane-benzoquinone-type heterodimers, and a highly rearranged aromadendrane-type sesquiterpenoid (8), along with four known analogs (9-12), were isolated from the liverwort Mylia nuda. Compounds 1-6 and 7, bearing tricyclo[6.2.1.02,7] undecane and tricyclo[5.3.1.02,6] undecane backbones, likely formed via a Diels-Alder reaction and radical cyclization, respectively. Their structures were determined by spectroscopic analysis, computational calculation, and single-crystal X-ray diffraction analysis. Dimeric compounds displayed cytoprotective effects against glutamic acid-induced neurological deficits.


Asunto(s)
Alcanos , Hepatophyta , Sesquiterpenos de Guayano , Sesquiterpenos , Hepatophyta/química , Estructura Molecular , Sesquiterpenos/farmacología , Sesquiterpenos/química , China
2.
Altern Ther Health Med ; 29(1): 170-179, 2023 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-36074964

RESUMEN

Objective: To analyze the comfort and influencing factors in patients with enterocutaneous intestinal fistula (ECF) on hospital admission and propose targeted nursing intervention countermeasures. Methods: A total of 193 patients with EDF admitted to Hunan Provincial People's Hospital in China from May 2018 to February 2021 were selected for this study. Basic patient data were collected upon admission and the Kolcaba Comfort Scale was used to score comfort status. Univariate and multivariate analysis methods were used to analyze the influencing factors. Results: Patients with ECF have low comfort scores; the social, psychological, physiological and environmental dimensions were affected by 8, 7, 4 and 2 factors, respectively. The number of fistulas and skin condition in patients with ECF were the main physiological factors affecting patients. Conclusion: Paying attention to the fistula and surrounding skin care and strengthening psychological counseling can improve the comfort of patients with ECF.


Asunto(s)
Fístula Intestinal , Humanos , Fístula Intestinal/terapia , China
3.
Tohoku J Exp Med ; 261(2): 109-116, 2023 Oct 07.
Artículo en Inglés | MEDLINE | ID: mdl-37407440

RESUMEN

This study aimed to identify the risk factors associated with puncture site bleeding following percutaneous puncture of the common femoral artery during interventional treatment of cerebrovascular disease (CVD). A retrospective analysis was conducted on 710 patients who underwent interventional treatment for CVD via femoral artery puncture. Among them, 26 individuals (3.66%) experienced bleeding at the femoral artery puncture site. Binary logistic regression analysis was performed to identify risk factors for puncture site bleeding. The impact of salt bag compression on postoperative bleeding was evaluated in patients with intermediate to high bleeding risk scores. The bleeding group showed higher blood pressure, lower platelet counts, longer prothrombin time and activated partial thromboplastin time, as well as a higher prevalence of larger vascular sheath sizes and variations in the timing of anti-coagulant and anti-platelet therapy administration. The bleeding risk score was higher in the bleeding group, indicating its predictive value for bleeding risk. Higher bleeding risk score, unstable blood pressure, repeated puncture, and serious vascular conditions were significant risk factors for puncture site bleeding. Application of salt bag compression for a duration of 2 hours reduced postoperative puncture site bleeding in patients with intermediate to high bleeding risk scores. Our study identified several significant risk factors for puncture site bleeding after cerebral vascular intervention via femoral artery puncture, including the bleeding risk score, blood pressure, repeated puncture, and vascular conditions. Implementing salt bag compression as a preventive measure can help mitigate bleeding complications in these high-risk patients.


Asunto(s)
Enfermedades Cardiovasculares , Trastornos Cerebrovasculares , Humanos , Arteria Femoral/cirugía , Estudios Retrospectivos , Resultado del Tratamiento , Hemorragia , Punciones/efectos adversos , Factores de Riesgo , Trastornos Cerebrovasculares/complicaciones , Enfermedades Cardiovasculares/complicaciones
4.
Molecules ; 28(15)2023 Jul 28.
Artículo en Inglés | MEDLINE | ID: mdl-37570700

RESUMEN

The roots of Astilbe grandis, known as "Ma sang gou bang", are used as a Miao traditional medicine with anti-inflammatory and analgesic properties. However, the active components and mechanism of action of this plant remain mostly uncharacterized. The aim of this study was to identify its active components and verify their pharmacological activity. The extract of A. grandis root was separated using various chromatographic methods. As a result, we obtained one novel triterpenoid, named astigranlactone (1), which has an unusual lactone moiety formed between C-7 and C-27. Additionally, a known coumarin compound, 11-O-galloyl bergenin (2) was isolated from this plant. The structures of these two compounds were elucidated by extensive NMR experiments in conjunction with HR-ESI-MS data. To the best of our knowledge, both compounds were isolated from this species for the first time. Moreover, we tested the anti-inflammation effect of the two compounds by establishing a cellular inflammation model induced by LPS in RAW264.7 cells. The effect of different concentrations of these compounds on the activity of RAW264.7 cells was assessed using a CCK8 assay. The levels of nitric oxide (NO), tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6) and interleukin-1ß (IL-1ß) in the supernatant of each group were evaluated using the Griess method and an enzyme-linked immunosorbent assay (ELISA). Western blot and quantitative real-time PCR (qRT-RCR) were used to measure the levels of cyclooxygenase 2 (COX-2) and nitric oxide synthase (iNOS) gene expression. Our findings revealed that these two compounds inhibited the high levels of NO, TNF-α, IL-6, IL-1ß, COX-2, and iNOS (induced by LPS). Mechanistic studies demonstrated that these two compounds reduced the activation of the nuclear transcription factor-B (NF-κB) signaling pathway by inhibiting the phosphorylation of p65. Therefore, our study indicates that compounds 1 and 2 can exert a definite anti-inflammatory effect by inhibiting the NF-κB signaling pathway.


Asunto(s)
Lipopolisacáridos , FN-kappa B , Animales , Ratones , FN-kappa B/metabolismo , Lipopolisacáridos/farmacología , Interleucina-6/metabolismo , Factor de Necrosis Tumoral alfa/metabolismo , Ciclooxigenasa 2/genética , Ciclooxigenasa 2/metabolismo , Macrófagos , Células RAW 264.7 , Antiinflamatorios/farmacología , Antiinflamatorios/metabolismo , Cumarinas/farmacología , Cumarinas/metabolismo , Óxido Nítrico/metabolismo
5.
Acta Pharmacol Sin ; 43(6): 1605-1615, 2022 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-34667293

RESUMEN

Decaprenylphosphoryl-ß-D-ribose oxidase (DprE1) plays important roles in the biosynthesis of mycobacterium cell wall. DprE1 inhibitors have shown great potentials in the development of new regimens for tuberculosis (TB) treatment. In this study, an integrated molecular modeling strategy, which combined computational bioactivity fingerprints and structure-based virtual screening, was employed to identify potential DprE1 inhibitors. Two lead compounds (B2 and H3) that could inhibit DprE1 and thus kill Mycobacterium smegmatis in vitro were identified. Moreover, compound H3 showed potent inhibitory activity against Mycobacterium tuberculosis in vitro (MICMtb = 1.25 µM) and low cytotoxicity against mouse embryo fibroblast NIH-3T3 cells. Our research provided an effective strategy to discover novel anti-TB lead compounds.


Asunto(s)
Antituberculosos , Mycobacterium tuberculosis , Animales , Antituberculosos/farmacología , Antituberculosos/uso terapéutico , Proteínas Bacterianas , Ratones , Modelos Moleculares
6.
Med Res Rev ; 41(3): 1798-1811, 2021 05.
Artículo en Inglés | MEDLINE | ID: mdl-33512023

RESUMEN

Aconitine (AC) is well-known as the main toxic ingredient and active compound of Aconitum species, of which several aconites are essential herbal medicines of Traditional Chinese Medicine (TCM) and widely applied to treat diverse diseases for their excellent anti-inflammatory, analgesic, and cardiotonic effects. However, the cardiotoxicity and neurotoxicity of AC attracted a lot of attention and made it a favorite botanic poison in history. Nowadays, the narrow therapeutic window of AC limits the clinical application of AC-containing herbal medicines; overdosing on AC always induces ventricular tachyarrhythmia and heart arrest, both of which are potentially lethal. But the underlying cardiotoxic mechanisms remained chaos. Recently, beyond its cardiotoxic effects, emerging evidence shows that low doses of AC or its metabolites could generate cardioprotective effects and are necessary to aconite's clinical efficacy. Consistent with TCM's theory that even toxic substances are powerful medicines, AC thus could not be simply identified as a toxicant or a drug. To prevent cardiotoxicity while digging the unique value of AC in cardiac pharmacology, there exists a huge urge to better know the characteristic of AC being a cardiotoxic agent or a potential heart drug. Here, this article reviews the advances of AC metabolism and focuses on the latest mechanistic findings of cardiac efficacy and toxicity of this aconite alkaloid or its metabolites. We also discuss how to prevent AC-related cardiotoxicity, as well as the issues before the development of AC-based medicines that should be solved, to provide new insight into the paradoxical nature of this ancient poison.


Asunto(s)
Aconitum , Medicamentos Herbarios Chinos , Venenos , Aconitina/efectos adversos , Aconitina/toxicidad , Medicamentos Herbarios Chinos/efectos adversos , Humanos , Venenos/toxicidad
7.
Ophthalmology ; 128(3): 453-462, 2021 03.
Artículo en Inglés | MEDLINE | ID: mdl-32858064

RESUMEN

PURPOSE: Bioelectronic retinal prostheses that stimulate the remaining inner retinal neurons, bypassing degenerated photoreceptors, have been demonstrated to restore some vision in patients blinded by retinitis pigmentosa (RP). These implants encode luminance of the visual scene into electrical stimulation, however, leaving out chromatic information. Yet color plays an important role in visual processing when it comes to recognizing objects and orienting to the environment, especially at low spatial resolution as generated by current retinal prostheses. In this study, we tested the feasibility of partially restoring color perception in blind RP patients, with the aim to provide chromatic information as an extra visual cue. DESIGN: Case series. PARTICIPANTS: Seven subjects blinded by advanced RP and monocularly fitted with an epiretinal prosthesis. METHODS: Frequency-modulated electrical stimulation of retina was tested. Phosphene brightness was controlled by amplitude tuning, and color perception was acquired using the Red, Yellow, Green, and Blue (RYGB) hue and saturation scaling model. MAIN OUTCOME MEASURES: Brightness and color of the electrically elicited visual perception reported by the subjects. RESULTS: Within the tested parameter space, 5 of 7 subjects perceived chromatic colors along or nearby the blue-yellow axis in color space. Aggregate data obtained from 20 electrodes of the 5 subjects show that an increase of the stimulation frequency from 6 to 120 Hz shifted color perception toward blue/purple despite a significant inter-subject variation in the transition frequency. The correlation between frequency and blue-yellow perception exhibited a good level of consistency over time and spatially matched multi-color perception was possible with simultaneous stimulation of paired electrodes. No obvious correlation was found between blue sensations and array placement or status of visual impairment. CONCLUSIONS: These findings present a strategy for the generation and control of color perception along the blue-yellow axis in blind patients with RP by electrically stimulating the retina. It could transform the current prosthetic vision landscape by leading in a new direction beyond the efforts to improve the visual acuity. This study also offers new insights into the response of our visual system to electrical stimuli in the photoreceptor-less retina that warrant further mechanistic investigation.


Asunto(s)
Ceguera/fisiopatología , Percepción de Color/fisiología , Terapia por Estimulación Eléctrica , Retina/fisiopatología , Retinitis Pigmentosa/terapia , Prótesis Visuales , Anciano , Visión de Colores/fisiología , Electrodos Implantados , Femenino , Humanos , Masculino , Persona de Mediana Edad , Fosfenos , Células Fotorreceptoras de Vertebrados/fisiología , Retinitis Pigmentosa/fisiopatología , Umbral Sensorial/fisiología , Agudeza Visual
8.
Zhongguo Dang Dai Er Ke Za Zhi ; 23(6): 593-598, 2021 Jun.
Artículo en Zh | MEDLINE | ID: mdl-34130781

RESUMEN

OBJECTIVE: To evaluate the clinical features of preterm infants with a birth weight less than 1 500 g undergoing different intensities of resuscitation. METHODS: A retrospective analysis was performed for the preterm infants with a birth weight less than 1 500 g and a gestational age less than 32 weeks who were treated in the neonatal intensive care unit of 20 hospitals in Jiangsu, China from January 2018 to December 2019. According to the intensity of resuscitation in the delivery room, the infants were divided into three groups:non-tracheal intubation (n=1 184), tracheal intubation (n=166), and extensive cardiopulmonary resuscitation (ECPR; n=116). The three groups were compared in terms of general information and clinical outcomes. RESULTS: Compared with the non-tracheal intubation group, the tracheal intubation and ECPR groups had significantly lower rates of cesarean section and use of antenatal corticosteroid (P < 0.05). As the intensity of resuscitation increased, the Apgar scores at 1 minute and 5 minutes gradually decreased (P < 0.05), and the proportion of infants with Apgar scores of 0 to 3 at 1 minute and 5 minutes gradually increased (P < 0.05). Compared with the non-tracheal intubation group, the tracheal intubation and ECPR groups had significantly higher mortality rate and incidence rates of moderate-severe bronchopulmonary dysplasia and serious complications (P < 0.05). The incidence rates of grade Ⅲ-Ⅳ intracranial hemorrhage and retinopathy of prematurity (stage Ⅲ or above) in the tracheal intubation group were significantly higher than those in the non-tracheal intubation group (P < 0.05). CONCLUSIONS: For preterm infants with a birth weight less than 1 500 g, the higher intensity of resuscitation in the delivery room is related to lower rate of antenatal corticosteroid therapy, lower gestational age, and lower birth weight. The infants undergoing tracheal intubation or ECRP in the delivery room have an increased incidence rate of adverse clinical outcomes. This suggests that it is important to improve the quality of perinatal management and delivery room resuscitation to improve the prognosis of the infants.


Asunto(s)
Cesárea , Recien Nacido Prematuro , Peso al Nacer , China , Femenino , Edad Gestacional , Humanos , Lactante , Recién Nacido , Embarazo , Estudios Retrospectivos
9.
BMC Gastroenterol ; 19(1): 219, 2019 Dec 18.
Artículo en Inglés | MEDLINE | ID: mdl-31852444

RESUMEN

BACKGROUND: Alternate-day fasting (ADF) is a novel diet therapy that may achieve reduction in body weight and improvement of dyslipidaemia, but the impact of this diet on patients with non-alcoholic fatty liver disease (NAFLD) remains unknown. The aim of this study was to evaluate the effects of ADF on the body weight and lipid profile of individuals with NAFLD. METHODS: NAFLD patients (n = 271) were randomised to the ADF group, time-restricted feeding (TRF) group, or the control group and subjected to the respective diet for 12 weeks. Anthropometric measurements (body weight, fat mass/fat-free mass) were performed, and plasma lipids were analysed enzymatically. RESULTS: Within 4 weeks, the body weight decreased significantly (P < 0.001) in the ADF group by 4.56 ± 0.41 kg (6.1 ± 0.5%) and the TRF group by 3.62 ± 0.65 kg (4.83 ± 0.9%) compared to the control group, and it decreased even more after 12 weeks in both groups (ADF: - 4.04 ± 0.54 kg, 5.4 ± 0.7%; TRF: - 3.25 ± 0.67 kg, 4.3 ± 0.9%). Fat mass was significantly reduced by ADF (- 3.49 ± 0.37 kg; 11 ± 1.2%) and TRF (- 2.91 ± 0.41 kg; 9.6 ± 1.3%), with ADF leading to a further reduction in fat mass after 12 weeks (- 3.48 ± 0.38 kg; 11 ± 1.2%). Total cholesterol was significantly decreased at both time points in the ADF group (- 0.91 ± 0.07 mmol/L; 18.5 ± 1.5%) compared to the control and TRF groups. Both ADF (- 0.64 ± 0.06 mmol/L; 25 ± 1.9%) and TRF (0.58 ± 0.07 mmol/L; 20 ± 1.7%) achieved a significant reduction in serum triglycerides (P < 0.001) after 12 weeks. Changes in fat free mass, HDL, LDL, fasting insulin, glucose, liver stiffness, and systolic or diastolic blood pressure did not differ between the groups. CONCLUSIONS: ADF appears to be an effective diet therapy for individuals with NAFLD that can achieve weight loss and improvement of dyslipidaemia within a relatively short period of time (4 to 12 weeks). Potential preventive effects of ADF on cardiovascular disease need to be confirmed by future investigations. TRIAL REGISTRATION: ChiCTR1900024411, this trial was retrospectively registered on July 10, 2019.


Asunto(s)
Dislipidemias/dietoterapia , Ayuno , Conducta Alimentaria , Enfermedad del Hígado Graso no Alcohólico/dietoterapia , Pérdida de Peso , Adiposidad/fisiología , Adulto , Composición Corporal , Peso Corporal , Colesterol/sangre , Dislipidemias/sangre , Ingestión de Energía , Ayuno/sangre , Femenino , Humanos , Hambre , Masculino , Enfermedades Metabólicas/etiología , Enfermedad del Hígado Graso no Alcohólico/sangre , Evaluación de Resultado en la Atención de Salud , Factores de Riesgo , Factores de Tiempo , Triglicéridos/sangre
10.
J Nat Prod ; 82(6): 1527-1534, 2019 06 28.
Artículo en Inglés | MEDLINE | ID: mdl-31117521

RESUMEN

Six new asperane-type sesterterpenoids, asperunguisins A-F (1-6), were isolated from the endolichenic fungus Aspergillus unguis, together with a known analogue, aspergilloxide (7); these are rare asperane-type sesterterpenoids, characterized by a unique hydroxylated 7/6/6/5 tetracyclic system. The structures of asperunguisins A-F (1-6) were elucidated on the basis of spectroscopic methods (NMR and HRESIMS), X-ray single-crystal diffraction analysis, ECD calculations, and biogenetic considerations. Asperunguisin C (3) showed cytotoxicity against the human cancer cell line A549 with an IC50 value of 6.2 µM. Further investigation revealed that the observed cell death was a result of G0/G1 cell cycle arrest via DNA damage followed by cellular apoptosis.


Asunto(s)
Células A549/efectos de los fármacos , Antineoplásicos/farmacología , Aspergillus/química , Hongos/química , Sesterterpenos/química , Sesterterpenos/farmacología , Células A549/química , Antineoplásicos/química , Cristalografía por Rayos X , Humanos , Espectroscopía de Resonancia Magnética , Estructura Molecular , Sesterterpenos/aislamiento & purificación
11.
Cell Mol Biol Lett ; 24: 10, 2019.
Artículo en Inglés | MEDLINE | ID: mdl-30906331

RESUMEN

This study was designed to investigate the potential role of microRNA-29c (miR-29c) in biliary atresia-related fibrosis. The expression of miR-29c was determined in 15 pairs of peripheral blood samples from infants with biliary atresia (BA) and infants with non-BA neonatal cholestasis using quantitative real-time PCR. EMT was established by induction with TGF-ß1 in HIBEpiC cells. MiR-29c was inhibited by lipofectamine transfection. The expressions of proteins related to epithelial-mesenchymal transition (EMT), i.e., E-cadherin, N-cadherin and vimentin, were determined using quantitative real-time PCR and western blotting. Direct interaction between miR-29c and DNMT3A and DNMT3B was identified using a luciferase reporter assay. The expressions of DNMT3A and DNMT3B were suppressed by treatment with SGI-1027. Patients with BA showed significantly lower miR-29c levels in peripheral blood samples than the control subjects. In vitro, TGF-ß1-induced EMT significantly decreased the expression of miR-29c. Downregulation of miR-29c had a promotional effect on BA-related fibrosis in HIBEpiC cells, as confirmed by the decrease in E-cadherin and increase in N-cadherin and vimentin levels. MiR-29c was found to target the 3'UTR of DNMT3A and DNMT3B and inhibit their expression. Suppression of DNMT3A and DNMT3B reversed the effects of miR-29c downregulation on BA-related fibrosis in HIBEpiC cells. These data suggest that BA-related fibrosis is closely associated with the occurrence of EMT in HIBEpiC cells. MiR-29c might be a candidate for alleviating BA-related fibrosis by targeting DNMT3A and DNMT3B.


Asunto(s)
Atresia Biliar/metabolismo , ADN (Citosina-5-)-Metiltransferasas/genética , Transición Epitelial-Mesenquimal , Fibrosis/metabolismo , MicroARNs/metabolismo , Atresia Biliar/complicaciones , Atresia Biliar/fisiopatología , ADN (Citosina-5-)-Metiltransferasas/metabolismo , ADN Metiltransferasa 3A , Fibrosis/etiología , Fibrosis/fisiopatología , Regulación de la Expresión Génica , Humanos , Lactante , MicroARNs/genética , ADN Metiltransferasa 3B
13.
J Nat Prod ; 81(9): 2041-2049, 2018 09 28.
Artículo en Inglés | MEDLINE | ID: mdl-30137985

RESUMEN

Eleven new p-terphenyls, floricolins K-U (1-11), together with 13 biosynthetically related known compounds (12-24) were isolated from an endolichenic fungus, Floricola striata. Their structures were elucidated by extensive spectroscopic analyses and single-crystal X-ray diffraction measurements. The newly isolated p-terphenyls inhibited the growth of A2780, MCF-7, and A549 cell lines. Further evaluation for the multidrug resistance (MDR) reversal activity of compound 5 revealed it enhanced the sensitivity of MCF-7/ADR cells toward adriamycin 39-fold at 10 µM through modulating P-glycoprotein-mediated drug exclusion.


Asunto(s)
Ascomicetos/metabolismo , Compuestos de Terfenilo/aislamiento & purificación , Línea Celular Tumoral , Doxorrubicina/farmacocinética , Doxorrubicina/farmacología , Resistencia a Múltiples Medicamentos/efectos de los fármacos , Humanos , Compuestos de Terfenilo/química , Compuestos de Terfenilo/farmacología
14.
J Asian Nat Prod Res ; 19(8): 786-792, 2017 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-28276758

RESUMEN

Two new α-pyrone derivatives, tolypocladones A (1) and B (2), together with five known compounds were isolated from an endolichenic fungus Tolypocladium sp. (4259a). The structures of all the compounds were determined by analysis of their MS and NMR data. Among them, compound 1 was an enantiomeric mixture and the configuration was established by single-crystal X-ray diffraction analysis using Cu-Kα radiation. Also, this is the first report of the presence of compound 3 (glycine, N-(2,3-dihydroxybenzoyl)-methyl ester) and compound 4 (2H-pyran-2-one, 4-methoxy-6-(1,3-pentadienyl)) as natural products.


Asunto(s)
Ascomicetos/química , Pironas/aislamiento & purificación , Candida albicans/efectos de los fármacos , China , Cristalografía por Rayos X , Líquenes/microbiología , Conformación Molecular , Estructura Molecular , Resonancia Magnética Nuclear Biomolecular , Pironas/química
15.
J Nat Prod ; 79(9): 2188-94, 2016 09 23.
Artículo en Inglés | MEDLINE | ID: mdl-27557136

RESUMEN

Ten new p-terphenyl derivatives, floricolins A-J (1-10), together with six known compounds (11-16), were isolated from the extract of the endolichenic fungus Floricola striata. Chemical structures of these compounds were elucidated using spectroscopic data (HRESIMS and NMR). Among them, 9 and 10 were enantiomeric mixtures, and their configurations were established by single-crystal X-ray diffraction analysis using Cu Kα radiation. Evaluation of the isolated compounds against Candida albicans revealed that the most active compound, 3 (MIC 8 µg/mL), exerted fungicidal action by destruction of the cell membrane.


Asunto(s)
Ascomicetos/química , Compuestos de Terfenilo/aislamiento & purificación , Antibacterianos/química , Candida albicans/efectos de los fármacos , Cristalografía por Rayos X , Escherichia coli/efectos de los fármacos , Pruebas de Sensibilidad Microbiana , Estructura Molecular , Staphylococcus aureus/efectos de los fármacos , Compuestos de Terfenilo/química
16.
Zhongguo Dang Dai Er Ke Za Zhi ; 18(5): 431-4, 2016 May.
Artículo en Zh | MEDLINE | ID: mdl-27165593

RESUMEN

OBJECTIVE: To establish a neonatal pig model of hemolytic jaundice. METHODS: Twelve seven-day-old purebred Yorkshire pigs were randomly divided into an experimental group and a control group (n=6 each). Immunization of New Zealand white rabbits was used to prepare rabbit anti-porcine red blood cell antibodies, and rabbit anti-porcine red blood cell serum was separated. The neonatal pigs in the experimental group were given an intravenous injection of rabbit anti-porcine red blood cell serum (5 mL), and those in the control group were given an intravenous injection of normal saline (5 mL). Venous blood samples were collected every 6 hours for routine blood test and liver function evaluation. RESULTS: The experimental group had a significantly higher serum bilirubin level than the control group at 18 hours after the injection of rabbit anti-porcine red blood cell serum (64±30 µmol/L vs 20±4 µmol/L; P<0.05). In the experimental group, the serum bilirubin level reached the peak at 48 hours (275±31 µmol/L), and decreased significantly at 96 hours after the injection (95±17 µmol/L), but all significantly higher than that in the control group (P<0.05). At 18 hours after the injection, the experimental group had a significantly lower red blood cell (RBC) count than the control group [(4.58±0.32)×10(12)/L vs (5.09±0.44)×10(12)/L; P<0.05]; at 24 hours, the experimental group showed further reductions in RBC count and hemoglobin level and had significantly lower RBC count and hemoglobin level than the control group [RBC: (4.21±0.24)×10(12)/L vs (5.11±0.39)×10(12)/L, P<0.05; hemoglobin: 87±3 g vs 97±6 g, P<0.05]. The differences in RBC count and hemoglobin level between the two groups were largest at 36-48 hours. CONCLUSIONS: The neonatal pig model of hemolytic jaundice simulates the pathological process of human hemolytic jaundice well and provides good biological and material bases for further investigation of neonatal hemolysis.


Asunto(s)
Modelos Animales de Enfermedad , Ictericia/etiología , Animales , Animales Recién Nacidos , Bilirrubina/sangre , Recuento de Eritrocitos , Femenino , Hemoglobinas/análisis , Masculino , Conejos , Porcinos
17.
BMC Neurosci ; 16: 67, 2015 Oct 19.
Artículo en Inglés | MEDLINE | ID: mdl-26480871

RESUMEN

BACKGROUND: Synaptic dysfunction is a key event in pathogenesis of neurodegenerative diseases such as Alzheimer's disease (AD) where synapse loss pathologically correlates with cognitive decline and dementia. Although evidence suggests that aberrant protein production and aggregation are the causative factors in familial subsets of such diseases, drugs singularly targeting these hallmark proteins, such as amyloid-ß, have failed in late stage clinical trials. Therefore, to provide a successful disease-modifying compound and address synaptic dysfunction and memory loss in AD and mixed pathology dementia, we repurposed a clinically proven drug, CMZ, with neuroprotective and anti-inflammatory properties via addition of nitric oxide (NO) and cGMP signaling property. RESULTS: The novel compound, NMZ, was shown to retain the GABAA potentiating actions of CMZ in vitro and sedative activity in vivo. Importantly, NMZ restored LTP in hippocampal slices from AD transgenic mice, whereas CMZ was without effect. NMZ reversed amnestic blockade of acetylcholine receptors by scopolamine as well as NMDA receptor blockade by a benzodiazepine and a NO synthase inhibitor in the step-through passive avoidance (STPA) test of learning and working memory. A PK/PD relationship was developed based on STPA analysis coupled with pharmacokinetic measures of drug levels in the brain: at 1 nM concentration in brain and plasma, NMZ was able to restore memory consolidation in mice. CONCLUSION: Our findings show that NMZ embodies a promising pharmacological approach targeting synaptic dysfunction and opens new avenues for neuroprotective intervention strategies in mixed pathology AD, neurodegeneration, and dementia.


Asunto(s)
Enfermedad de Alzheimer/tratamiento farmacológico , Clormetiazol/análogos & derivados , Reposicionamiento de Medicamentos/métodos , Agonistas de Receptores de GABA-A/farmacología , Hipocampo/efectos de los fármacos , Potenciación a Largo Plazo/efectos de los fármacos , Fármacos Neuroprotectores/farmacología , Nootrópicos/farmacología , Animales , Proteína de Unión a CREB/metabolismo , GMP Cíclico/metabolismo , Modelos Animales de Enfermedad , Agonistas de Receptores de GABA-A/farmacocinética , Masculino , Ratones , Ratones Transgénicos , Fármacos Neuroprotectores/farmacocinética , Óxido Nítrico/metabolismo , Nootrópicos/farmacocinética , Transducción de Señal/efectos de los fármacos , Sinapsis/efectos de los fármacos , Sinapsis/patología , Xenopus laevis
18.
Ophthalmology ; 122(12): 2545-52.e1, 2015 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-26386850

RESUMEN

PURPOSE: The Argus I implant is the first-generation epiretinal prosthesis approved for an investigational clinical trial by the United States Food and Drug Administration. Herein we report testing results obtained from a 10-year follow-up to study the physiologic effects of the bioelectronic visual implant after prolonged chronic electrical stimulation. DESIGN: Case report. PARTICIPANT: One man, 55 years of age when enrolled in the study, underwent surgical implantation of the Argus I in June 2004, followed by periodic tests from July 2004 through June 2014, spanning a total of 10 years. METHODS: The decade-long follow-up consisted of implant system performance tests, subject visual function evaluation, and implant-retina interface analysis. MAIN OUTCOME MEASURES: Changes in electrode impedance and perceptual threshold over the time course; subject's performance on visual function task, orientation, and mobility tests; and optical coherence tomography data, fundus imaging, and fluorescein angiography results for the assessment of subject's implant-retina physical interface. RESULTS: Electrically elicited phosphenes were present 10 years after implantation of an epiretinal stimulator. The test subject not only was able to perceive phosphenes, but also could perform visual tasks at rates well above chance. CONCLUSIONS: This decade-long follow-up report provides further support for the use of retinal prostheses as a long-lasting treatment for some types of blindness.


Asunto(s)
Ceguera/rehabilitación , Fosfenos/fisiología , Retina/fisiopatología , Percepción Visual/fisiología , Prótesis Visuales , Ceguera/fisiopatología , Impedancia Eléctrica , Electrodos Implantados , Angiografía con Fluoresceína , Estudios de Seguimiento , Humanos , Masculino , Persona de Mediana Edad , Implantación de Prótesis , Umbral Sensorial , Terapias en Investigación , Tomografía de Coherencia Óptica
19.
J Asian Nat Prod Res ; 17(2): 182-7, 2015.
Artículo en Inglés | MEDLINE | ID: mdl-25401948

RESUMEN

One new diketopiperazine heterodimer, asperazine A (1), and eight known compounds, asperazine (2), cyclo(d-Phe-l-Trp) (3), cyclo(l-Trp-l-Trp) (4), 4-(hydroxymethyl)-5,6-dihydro-pyran-2-one (5), walterolactone A (6), and campyrones A-C (7-9), were isolated from an endophytic fungus Aspergillus niger. Their structures were determined unequivocally on the basis of extensive spectroscopic data analysis. This is the first report of the presence of compound 3 as a natural product. Cytotoxicity test against human cancer cell lines PC3, A2780, K562, MBA-MD-231, and NCI-H1688 revealed that compounds 1 and 2 had weak activities.


Asunto(s)
Antineoplásicos/aislamiento & purificación , Aspergillus niger/química , Dicetopiperazinas/aislamiento & purificación , Antineoplásicos/química , Antineoplásicos/farmacología , China , Dicetopiperazinas/química , Dipéptidos/química , Dipéptidos/aislamiento & purificación , Ensayos de Selección de Medicamentos Antitumorales , Humanos , Células K562 , Estructura Molecular , Resonancia Magnética Nuclear Biomolecular , Péptidos Cíclicos/química , Péptidos Cíclicos/aislamiento & purificación
20.
Zhong Yao Cai ; 38(8): 1665-7, 2015 Aug.
Artículo en Zh | MEDLINE | ID: mdl-26983241

RESUMEN

OBJECTIVE: To study the chemical constituents from the rhizome of Valeriana jatamansi. METHODS: The chemical constituents were separated and purified by silica gel, medium pressure column chromatography, and preparative HPLC. Their structures were determined by physicochemical properties and spectral data. RESULTS: Six compounds were isolated from the dibromochloromethane extract in the rhizome of Valeriana jatamansi, and identified as decursidin (1), decursitin B (2), decursitin A (3), 3'(S)-acetoxy-4'(R)-angeloyloxy-3',4'-dihydroxanthyletin (4), 8-acetoxyl-pathchouli alcohol (5) and dibutyl phthalate (6). CONCLUSION: Compounds 1-4 are coumarins which are isolated from this genus for the first time,and compound 6 is isolated from this genus for the first time.


Asunto(s)
Fitoquímicos/análisis , Rizoma/química , Valeriana/química , Cromatografía Líquida de Alta Presión , Cumarinas/análisis , Nardostachys/química
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