RESUMO
Objective: To investigate a new method for occupational protection training for medical staff, and to improve the awareness of occupational protection among medical staff. Methods: In August 2018, convenience sampling was performed to select 171 new medical workers in a grade A tertiary teaching hospital as subjects. The subjects were trained according to the requirements for occupational protection knowledge and training objectives. A questionnaire was distributed before training, and the scores were collected as control group; the subjects were trained using the conventional PPT theory, a questionnaire was distributed after training, and the scores were collected as trial group 1; the subjects were trained using the conventional PPT theory combined with the situational simulation teaching method, a questionnaire was distributed after training, and the scores were collected as trial group 2. A total of 171 questionnaires were distributed and collected for each survey, with a questionnaire recovery rate of 100%. Continuous data were expressed as mean±SD and were evaluated by an analysis of variance; categorical data were expressed as rate (%) , and the chi-square test was used for analysis. Results: A total of 171 medical workers, aged 22-33 years (mean 23.63±2.33 years) , participated in the study, among whom 127 (74.27%) were nurses, 146 (85.38%) were female workers, and 93 (54.39%) had a college degree. The awareness rate of occupational protection knowledge was 24.56%-70.18% in the control group, 63.16%-96.49% in the trial group 1, and 86.55%-99.42% in the trial group 2. There was a significant difference in the awareness rate of occupational protection knowledge among all the groups (P<0.01) , and there were also significant differences in theoretical test score, skill assessment score, and total score among all the groups (F=116.342, 189.424, and 304.904, P<0.01) . Theoretical test score, skill assessment score, and total score tended to increase after the training based on the conventional PPT theory or the training based on the conventional PPT theory and situational simulation (F=125.042, 352.025, and 444.073, P<0.01) . Conclusion: The situational simulation teaching method for the training of occupational protection knowledge for medical staff has a marked training effect and can significantly improve the theoretical and skill levels of medical staff.
Assuntos
Corpo Clínico/educação , Saúde Ocupacional/educação , Treinamento por Simulação , Adulto , Feminino , Humanos , Masculino , Inquéritos e Questionários , Adulto JovemRESUMO
Image jitters occur in the video of the autonomous robot moving on bricks road, which will reduce robot operation precision based on vision. In order to compensate the image jitters, the affine transformation kinematics were established for obtaining the six image motion parameters. The feature point pair detecting method was designed based on Eigen-value of the feature windows gradient matrix, and the motion parameters equation was solved using the least square method and the matching point pairs got based on the optical flow. The condition number of coefficient matrix was proposed to quantificationally analyse the effect of matching errors on parameters solving errors. Kalman filter was adopted to smooth image motion parameters. Computing cases show that more point pairs are beneficial for getting more precise motion parameters. The integrated jitters compensation software was developed with feature points detecting in subwindow. And practical experiments were conducted on two mobile robots. Results show that the compensation costing time is less than frame sample time and Kalman filter is valid for robot vision jitters compensation.
Assuntos
Modelos Teóricos , Movimento (Física) , Robótica/métodos , Visão OcularRESUMO
Apolipoprotein A5 (APOA5) and C3 (APOC3) genes are involved in the PPAR lipid metabolism pathway and thus associated with elevated triglyceride levels. However, whether APOA5 and APOC3 genetic polymorphisms affect intramuscular fat deposition and other meat quality traits remains unknown in pigs. One hundred and seventy-one Kele pigs were sampled to investigate genetic variants in the APOA5 and APOC3 genes and their association with seven pork quality traits. We identified 5 single nucleotide polymorphisms (SNPs) in the promoter region of the APOA5 gene and 17 SNPs in the APOC3 gene. Linkage disequilibrium analysis revealed 5 complete linkage disequilibria among these 22 SNPs. We found that 10 SNPs were significantly correlated with meat quality traits, including the mutation A5/-769 in the APOA5 gene, which was significantly associated with cooked weight percentage, and 9 SNPs in the APOC3 gene that were significantly associated with drip loss rate, meat color value of longissimus dorsi muscle and shear force. Therefore, these SNP markers will be useful for marker-assisted selection for improved pork quality.
Assuntos
Apolipoproteínas A/genética , Apolipoproteínas C/genética , Carne/análise , Polimorfismo de Nucleotídeo Único , Locos de Características Quantitativas , Sus scrofa/genética , Animais , Qualidade dos Alimentos , Frequência do Gene , Desequilíbrio de Ligação , Fenótipo , TriglicerídeosRESUMO
Objective: To evaluate the prognostic significance of clonal gene mutations using next-generation sequencing in patients with core-binding factor acute myeloid leukemia (CBF-AML) who achieved first complete remission after induction chemotherapy. Methods: The study, which was conducted from July 2011 to August 2017 in First Affiliated Hospital of Soochow University, comprised 195 newly diagnosed patients with CBF-AML, including 190 patients who achieved first complete remission after induction chemotherapy. The cohort included 134 patients with RUNX1-RUNXIT1(+) AML and 56 patients with CBFß-MYH11(+) AML. The cohort age ranged from 15 to 64 years, with a median follow-up of 43.6 months. Overall survival (OS) and disease-free survival (DFS) were assessed by the log-rank test, and the Cox proportional hazards regression model was used to determine the effects of clinical factors and genetic mutations on prognosis. Results: The most common genetic mutations were in KIT (47.6% ) , followed by NRAS (20.0% ) , FLT3 (18.4% ) , ASXL2 (14.3% ) , KRAS (10.7% ) , and ASXL1 (9.7% ) . The most common mutations involved genes affecting tyrosine kinase signaling (76.4% ) , followed by chromatin modifiers (29.7% ) . Among the patients receiving intensive consolidation therapy, the OS tended to be better in patients with CBFß-MYH11(+) AML than in those with RUNX1-RUNXIT1 (+) AML (P=0.062) . Gene mutations related to chromatin modification, which were detected only in patients with RUNX1-RUNXIT1(+) AML, did not affect DFS (P=0.557) . The patients with mutations in genes regulating chromatin conformation who received allo-hematopoietic stem cell transplantation (allo-HSCT) achieved the best prognosis. Multivariate analysis identified KIT exon 17 mutations as an independent predictor of inferior DFS in patients with RUNX1-RUNXIT1(+) AML (P<0.001) , and allo-HSCT significantly prolonged DFS in these patients (P=0.010) . Conclusions: KIT exon 17 mutations might indicate poor prognosis in patients with RUNX1-RUNXIT1(+) AML. Allo-HSCT may improve prognosis in these patients, whereas allo-HSCT might also improve prognosis in patients with mutations in genes related to chromatin modifications.
Assuntos
Transplante de Células-Tronco Hematopoéticas , Leucemia Mieloide Aguda , Proteínas Proto-Oncogênicas c-kit/genética , Adolescente , Adulto , Humanos , Quimioterapia de Indução , Leucemia Mieloide Aguda/tratamento farmacológico , Leucemia Mieloide Aguda/genética , Pessoa de Meia-Idade , Mutação , Prognóstico , Adulto JovemRESUMO
The purpose of this study was to determine preventive and protective effects of chronic orally administration with quetiapine (QUE) against anxiety-like behavior and cognitive impairments in rats exposed to the enhanced single prolonged stress (ESPS), an animal model that is used to study post-traumatic stress disorder (PTSD), and to detect changes in the expression of cortical phosphorylated p44/42 extracellular-regulated protein kinase (pERK1/2). Before or after exposure to ESPS paradigm, consisting of 2-h constraint, 20-min forced swimming, ether-induced loss of consciousness, and an electric foot shock, rats were given orally QUE (10 mg/kg daily) for 14 days. Animals were then tested in the open field (OF), elevated plus-maze (EPM), and Morris water maze (MWM). Brains were removed for immunohistochemical staining of pERK1/2. ESPS exposure resulted in pronounced anxiety-like behavior compared to unexposed animals. ESPS-exposed animals also displayed marked learning and spatial memory impairments. However, QUE treatment (both before and after ESPS exposure) significantly ameliorated anxiety-like behavior, learning and spatial memory impairments. ESPS also markedly reduced the expression of pERK1/2 in the prefrontal cortex, medial amygdala nucleus, and cingulate gyrus. Both before and after ESPS exposure QUE treatments significantly elevated the reduced pERK1/2 expression in the three brain regions. QUE has preventive and protective effects against stress-associated symptoms and the changes in pERK1/2 functions may be associated with the pathophysiology of traumatic stress and the therapeutic efficacy of anti-PTSD therapy.
Assuntos
Antipsicóticos/farmacologia , Transtornos de Ansiedade/tratamento farmacológico , Transtornos Cognitivos/tratamento farmacológico , Dibenzotiazepinas/farmacologia , Transtornos de Estresse Pós-Traumáticos/tratamento farmacológico , Anestésicos Inalatórios/farmacologia , Animais , Modelos Animais de Doenças , Eletrochoque , Éter/farmacologia , MAP Quinases Reguladas por Sinal Extracelular/metabolismo , Sistema de Sinalização das MAP Quinases/efeitos dos fármacos , Masculino , Proteína Quinase 1 Ativada por Mitógeno/metabolismo , Proteína Quinase 3 Ativada por Mitógeno/metabolismo , Neurônios/efeitos dos fármacos , Neurônios/metabolismo , Córtex Pré-Frontal/citologia , Córtex Pré-Frontal/efeitos dos fármacos , Córtex Pré-Frontal/metabolismo , Fumarato de Quetiapina , Ratos , Ratos Sprague-Dawley , Natação , Inconsciência/induzido quimicamenteRESUMO
BACKGROUND: Intracarotid propofol infusion was studied in canines as an experimental basis for application of propofol in the Wada test. METHODS: First, efficacy and side-effects of propofol anaesthesia were studied in eight mongrel dogs that received intracarotid and i.v. propofol infusions for 30 min according to a cross-over design. Auditory evoked potentials were used to guide anaesthesia. Secondly, eight mongrel dogs received intracarotid propofol infusion during both normal and cerebral hyperperfusion states using nicardipine. Haemodynamics and clinical endpoints were compared between the two infusion conditions. RESULTS: We required 33 (7.6) mg propofol intracarotically vs 113 (17) mg propofol i.v. to achieve an anaesthetic state. The mean arterial pressure (MAP) decreased about 15-27% from the baseline during i.v. infusion. However, no obvious decrease of MAP was observed after intracarotid infusion. Administration of nicardipine increased the blood flow in the internal carotid artery by 17%. Then, the propofol dosage for achieving the anaesthetic effect increased from 7.7 (0.9) mg in the normal control to 11.3 (0.8) mg in the nicardipine group. The onset time of anaesthetic effect was prolonged and the recovery time was shortened during intracarotid infusion during cerebral hyperperfusion. CONCLUSIONS: Compared with i.v. propofol infusion, intracarotid infusion could reach and maintain the target anaesthetic depth with less dosage and without affecting MAP. In addition, increase of cerebral blood flow requires a higher propofol dose, prolongs onset, and shortens recovery time during intracarotid propofol anaesthesia, indicating that patients with a cerebral hyperperfusion state may need higher dose of anaesthetics during the Wada test.
Assuntos
Anestésicos Intravenosos/administração & dosagem , Circulação Cerebrovascular/fisiologia , Propofol/administração & dosagem , Anestésicos Intravenosos/sangue , Anestésicos Intravenosos/farmacologia , Animais , Pressão Sanguínea/efeitos dos fármacos , Artéria Carótida Primitiva , Artéria Carótida Interna/efeitos dos fármacos , Artéria Carótida Interna/fisiologia , Circulação Cerebrovascular/efeitos dos fármacos , Cães , Potenciais Evocados Auditivos/efeitos dos fármacos , Frequência Cardíaca/efeitos dos fármacos , Masculino , Nicardipino/farmacologia , Propofol/sangue , Propofol/farmacologia , Vasodilatadores/farmacologiaRESUMO
BACKGROUND AND OBJECTIVE: Insomnia is a common complaint in the general population. Interest in the use of alternative treatments for insomnia is increasing exponentially and is fairly common in Taiwan. We undertook a survey to define the drug utilization patterns of Chinese herbal medicines (CM) for insomnia in Taiwan. METHODS: The survey was conducted over a period of 4 years, from January 2003 to December 2006. Outpatients with primary insomnia and being treated with CM were studied. Core drug-use indicators were the number of CM items per prescription, the dosing frequency and duration of CM prescriptions, the most common prescribed CM herbs and CM formulae used. RESULTS: Six thousand eight hundred and sixty patients, using 37,046 CM herb items, were screened during the study period. The average CM items per prescription was 5.40. Most of prescriptions (95.23%) were prescribed for administration three times a day. The most often prescribed Chinese herbal products were Hong-Hwa (Carthamus tinctorius) and Jia-Wey-Shiau-Yau-San, which includes Angelica sinensis, Atractylodes macrocephala, Paeonia lactiflora, Bupleurum chinense, and Poria coco. CONCLUSION: This is the first extensive survey examining the drug utilization patterns of Chinese herbal medicines in the treatment of insomnia. Although the data were generated in Taiwan, the herbs and practices identified are likely to be widely generalizable wherever Chinese herbal remedies are used for insomnia. Multiple herbs and complex formulae were commonly used. The baseline data generated should be of use in informing subsequent studies, including those aimed at a thorough evaluation of the herbs' effectiveness.
Assuntos
Medicamentos de Ervas Chinesas/uso terapêutico , Medicina Tradicional Chinesa , Distúrbios do Início e da Manutenção do Sono/tratamento farmacológico , Adolescente , Adulto , Idoso , Criança , Pré-Escolar , Uso de Medicamentos , Feminino , Humanos , Lactente , Masculino , Pessoa de Meia-Idade , TaiwanRESUMO
Objective:Building a canine vocal fold scar model and analyzing the changes in morphology, histopathology and related factors of extra cellular matrix (ECM) of vocal cord healing at different time periods.Method:Five experimental dogs were randomly divided into the control group(one dog) and the experimental group (four dogs). No special treatment was done on the control group, and the experimental group was given CO2 laser through laryngoscope with minimally invasive surgery on bilateral vocal cords. Observation of the morphological changes of injured vocal cords was made at five different time, pre-operation and 6 h, 3 w, 8 w and 12 w post-operation. HE staining, immunofluorescence, were used respectively to observe the histopathological and ultrastructural changes of each layer of vocal cord. Observation were made on the changing pattern of lysyl oxidase (LOX), heat shock proteins70 (HSP70), and the integrated optical density index (IOD) of Hyaluronic acid (HA) in vocal cord tissues. Result:â Laryngoscope shows there were mild congestion and edema and inflammatory exudation on the wound surface of vocal cord 3w post-operation. On the wound surface of vocal cord 8 w post-operation, the congestion and edema disappear, the local contraction sink, and no adhesion and granulation form. 12 w post-operation, the surface of the vocal cord was smooth, there were local contractures, vocal fold scar form, and hoarseness in the bilateral vocal cords was obvious. â¡HE staining shows 6 h post-operation there were a large number of inflammatory cell infiltration, red blood cell leakage, and cell congestion and edema on the wound surface of vocal cord. 3 w post-operation, there were fibroblast proliferation, angiogenesis, and a large number of fibrous tissues disorderly arranged on the wound surface of vocal cord. 8w post-operation, each layer of fibrous tissues were in hyperplasia and the blood vessels was thicken after on the wound surface of vocal cord, 12 w post-operation, a large number of collagens increases and were in group or fasciculation disorder. There were many irregular gaps in fibers, and blood vessels and glands become rare or disappear. â¢The immunofluorescence showed LOX, HSP70 and HA were all localized in the cellular cytoplasm and nucleus. The expression levels were different at different postoperative time, and they were mainly relatively strong expressed in the inflammatory cells, vascular endothelial cells and the glands. â£The comparison of IOD values: The IOD values of LOX were different at different time periods (P< 0.05). There were no significant differences in IOD of HSP70 between pre-operation and 12 w post-operation, but there are significant differences among other groups (P< 0.05). There were no significant differences in IOD of HA between pre-operation and 12 w post-operation, but there were significant differences among other groups (P< 0.01). â¤The expression of LOX decreased 6h post-operation and increased 3-12 w post-operation. The expression of HSP70 post-operation reached the peak 6 h post-operation and decreased 3-12 w post-operation. The expression of HA decreased 6 h post-operation, increased to the peak 8 w post-operation, and decreased 8-12 w post-operation.â¥The transmission electron microscope showed 3 w to 8 w post-operation, in the intrinsic layer of the vocal cord, the fibroblasts were extremely active, the cells swelled, and the organelles were abundant.12 w post-operation, there were a small number of fibroblasts in the active state, and larger gaps between the fibers and fewer and thinner elastic fibers. Conclusion:CO2 laser ablation of vocal cords under the Micro Post-Laryngoscope could establish reliable animal model of vocal fold scar, and 12 w reticular the vocal fold scars basically form. LOX, HSP70, HA play different roles at early, middle, and late stages in the vocal fold scar formation, and they can be used as a more sensitive index for vocal fold scar formation.
Assuntos
Cicatriz , Laringoscópios , Lasers de Gás , Prega Vocal/lesões , Prega Vocal/cirurgia , Animais , Modelos Animais de Doenças , Cães , Ácido Hialurônico , Lasers de Gás/uso terapêutico , Proteína-Lisina 6-OxidaseAssuntos
Quimioterapia de Consolidação , Leucemia Mieloide Aguda , Proteínas de Fusão Oncogênica , Inversão Cromossômica , Cromossomos Humanos Par 16 , Humanos , Leucemia Mieloide Aguda/tratamento farmacológico , Leucemia Mieloide Aguda/genética , Mutação , Proteínas de Fusão Oncogênica/genética , PrognósticoRESUMO
By using both light and electron microscopic immunocytochemical methods, Met5-Enkephalin-Arg6-Gly7-Leu8 (MEAGL)-like immunoreactive structures were detected in the pelvic ganglion of male rats. Denervation studies were carried out to determine the origin of these immunoreactive fibers and the projection of immunoreactive neurons within the pelvic ganglion. MEAGL-like immunoreactivity was found in numerous axon boutons, some small, intensely fluorescent (SIF) cells, and a few principal ganglion neurons. Most of the immunoreactive nerve fibers formed pericellular plexuses surrounding the ganglion cells. In addition, there were a few scattered varicose fibers. These fiber plexuses could be classified into two types: type I (approximately 90% of fibers), which consisted of 80-120 small boutons that synapsed on either the dendrites (80% of cases) or somata (20% of cases) of principal neurons; and type II (approximately 10% of fibers), which consisted of 20-40 larger boutons that formed axodendritic synapses exclusively. After transection of the hypogastric and pelvic nerves, virtually all of the pericellular fiber plexuses disappeared, whereas the scattered varicose fibers remained. According to their ultrastructure, these remaining fibers were considered to arise from SIF cells. Following the injection of Fast Blue into the bladder wall, some of the MEAGL-like immunoreactive principal neurons were retrogradely labeled. The results of this study indicate that there are two origins for the MEAGL-like immunoreactive fibers detected in the pelvic ganglion: most arise from preganglionic neurons in the spinal cord, and a small proportion may originate from intraganglionic MEAGL-like immunoreactive SIF cells or principal neurons. Some MEAGL-like immunoreactive principal neurons may project to the urinary bladder.
Assuntos
Encefalina Metionina/análogos & derivados , Plexo Hipogástrico/metabolismo , Animais , Encefalina Metionina/metabolismo , Plexo Hipogástrico/ultraestrutura , Imuno-Histoquímica , Masculino , Ratos , Ratos EndogâmicosRESUMO
In order to study the morphological characteristics and terminating patterns of the neurons of the trigeminal mesencephalic nucleus (Vme), 55 masseteric neurons in Vme in the rat were stained by intracellular injection of horseradish peroxidase (HRP). Labeled cells were distributed throughout the nucleus. These neurons were divided into three types: uni- or pseudounipolar (type A, n = 43), bipolar (type B, n = 5), and multipolar cells (type C, n = 7). Each type was further divided into two subtypes according to the largest diameter of the perikarya (type a greater than or equal to 30 microns, type b less than 30 microns). The central processes of type Aa neurons projected to the following three groups of target nuclei: 1) nuclei functioning as interneurons, including supratrigeminal nucleus (Vsup), intertrigeminal nucleus (Vint), juxta-trigeminal region (Vjux), and parvicellular nucleus of the pontomedullary reticular formation (PcRF); 2) motor nuclei, including the trigeminal motor nucleus (Vmo), accessory facial nucleus (NVIIacs), accessory abducens nucleus (NVIacs), and a small number of labeled axons in the oculomotor nucleus and trochlear nucleus; 3) sensory nuclei, including the dorsomedial part of the principal trigeminal sensory nucleus (Vpdm) and the dorsomedial part of subnucleus oralis of the trigeminal spinal nucleus (Vodm). Labeled processes were dense in the Vsup, Vmo, and Vpdm. The proprioceptive pathway of the fifth nerve is discussed. Direct projections from type Aa neurons of Vme to the Vpdm and dorsolateral part of the Vsup contribute to conduction of the proprioceptive information from spindles of masticatory muscle to the contralateral thalamus in the rat. Different axon morphology, distribution, terminal branch density, and terminating patterns of type Aa neurons were noted in different functional groups of the projecting nuclei, especially in the Vsup, Vmo, and Vpdm. The highest terminal branching density, the most extensive distribution, and two different types of branching patterns (claw-like and comb-like) were observed in Vsup. Selective distribution and single-beaded or "Y"-shaped terminal branches were observed in Vmo. In the Vppdm the axonal branches were sparser than in the Vsup or Vmo, and had an arrangement like the branches of a weeping willow tree. These characteristics of anatomical organization might be related to the function of each projecting nucleus.
Assuntos
Músculo Masseter/inervação , Neurônios/química , Núcleos do Trigêmeo/anatomia & histologia , Animais , Peroxidase do Rábano Silvestre , Terminações Nervosas/anatomia & histologia , Terminações Nervosas/citologia , Vias Neurais/anatomia & histologia , Ratos , Ratos Endogâmicos , Núcleos do Trigêmeo/citologiaRESUMO
Studies were made on whether substance P-, leucine-enkephalin- and 5-hydroxytryptamine (serotonin)-like immunoreactive fibers exert a direct influence on the cremaster motoneurons of the male rat by immunocytochemistry combined with retrograde tracing at the light- and electron-microscopic levels. Horseradish peroxidase was used as a retrograde tracer. Two days after injection of horseradish peroxidase into the genitofemoral nerves, its accumulation in the cremaster motoneurons was demonstrated by the diaminobenzidine-nickel method. On immunocytochemical examination of the same sections immunoreactive end-products were detected by the peroxidase-antiperoxidase method. Two different kinds of reaction products were distinguishable at both the light- and electron-microscopical levels. The horseradish peroxidase-labeled cremaster motoneurons at the L1 and L2 levels of the spinal cord were surrounded by abundant immunoreactive terminals. Examination at the ultrastructural level showed that substance P-like immunoreactive terminals formed synaptic contacts almost exclusively with the proximal dendrites of these horseradish peroxidase-labeled cremaster motoneurons. On the other hand, in the leucine-enkephalin- and serotonin-like boutons, significant numbers of axosomatic contacts with horseradish peroxidase-labeled cells were seen although axodendritic contacts with horseradish peroxidase-labeled cells were predominant. Occasionally, leucine-enkephalin-like immunoreactive fibers with synapses on horseradish peroxidase-labeled neurons formed axoaxonic contacts with other leucine-enkephalin-like axonal terminals. Thus, substance P-, leucine-enkephalin- and serotonin-like fibers clearly regulate the function of cremaster motoneurons monosynaptically. The varied synaptic contacts of these fibers according to the neuroactive substances involved suggest different actions of these substances on the cremaster motoneurons.
Assuntos
Encefalina Leucina/metabolismo , Neurônios Motores/metabolismo , Terminações Nervosas/metabolismo , Serotonina/metabolismo , Medula Espinal/metabolismo , Substância P/metabolismo , Animais , Imuno-Histoquímica , Masculino , Microscopia Eletrônica , Neurônios Motores/ultraestrutura , Terminações Nervosas/ultraestrutura , Ratos , Ratos Endogâmicos , Medula Espinal/citologiaRESUMO
The present study was initiated to investigate the role of extracellular signal-regulated kinases (ERK) 1/2 signaling pathway in the early response of spinal cord and associated dorsal root ganglion (DRG) to rhizotomy by using Western blotting and immunohistochemical techniques in a rat model of L3 and L4 dorsal root transection. The results showed that there were a considerable amount of total and phosphorylated ERK 1/2 protein in both spinal cord and DRG in normal animals killed under pentobarbital anesthesia. The total ERK 1/2 distributed in both glia and neurons, while phosphorylated ERK 1/2 dominantly existed in the latter in the gray matter of spinal cord, as demonstrated with double immunofluorescent staining. Twenty-four and forty-eight hours after axotomy, the phosphorylation level of ERK 1/2 in the operation side of dorsal spinal cord was much higher than that in the contralateral side, while the total ERK 1/2 level seemed unchanged. The increased expression of Fos protein was also seen in the dorsal spinal cord at lesion side twelve and twenty-four hours after axotomy. Double fluorescent staining proved that the phosphorylated ERK 1/2 positive cells in the ipsilateral dorsal spinal cord after axotomy predominantly were microglia and small portion was oligodendrocytes, whereas the Fos expression was mainly in neurons. In normal DRG, most neurons, especially the medium and small-sized ones, and the satellite cells contained total ERK 1/2-like immunoreactivity, whereas only a small portion of neurons and satellite cells contained phosphorylated ERK 1/2. After unilateral dorsal rhizotomy, there were no detectable changes for the phosphorylation of ERK 1/2 in either neurons or satellite cells in DRG.Collectively, the present results suggest that both ERK and Fos signal pathways involve the cellular activation in the spinal cord following dorsal rhizotomy, with ERK mainly in microglia and Fos in neurons. The increase of phosphorylation of ERK 1/2 in microglia of spinal cord after rhizotomy implicates that ERK signaling pathway involves intracellular activity of microglia responding to the experimental injury.
Assuntos
Gânglios Espinais/enzimologia , Gânglios Espinais/lesões , Microglia/enzimologia , Proteínas Quinases Ativadas por Mitógeno/metabolismo , Neurônios Aferentes/enzimologia , Rizotomia/efeitos adversos , Regulação para Cima/fisiologia , Animais , Biomarcadores , Modelos Animais de Doenças , Imunofluorescência , Lateralidade Funcional/fisiologia , Gânglios Espinais/fisiopatologia , Sistema de Sinalização das MAP Quinases/fisiologia , Masculino , Fosforilação , Terminações Pré-Sinápticas/enzimologia , Proteínas Proto-Oncogênicas c-fos/metabolismo , Ratos , Ratos Sprague-Dawley , Tempo de Reação/fisiologia , Células Satélites Perineuronais/enzimologia , Medula Espinal/enzimologia , Medula Espinal/fisiopatologiaRESUMO
We investigated the adhesion of human umbilical vein endothelial cells (HUVECs) to fibrin(ogen) molecule of varying structure for identifying sites that mediate cell attachment. Fibrin was prepared either with ancrod which liberates only FPA from fibrinogen, or with thrombin, which liberates both FPA and FPB. Both fibrin preparations equally supported HUVEC attachment. GRGDS, RGD-containing peptides of snake venoms, and monoclonal antibodies against alpha v beta 3 (23C6 and 7E3) inhibited the attachment of HUVECs to fibrin by 65-75%. In contrast, the attachment of HUVECs to fibrinogen was less effective and was almost completely inhibited by both RGD-containing peptides and by antibodies against integrin alpha v beta 3 (85-95% inhibition). The C-terminal dodecapeptide of fibrinogen gamma chain (residues 400-411) inhibited minimally the attachment of HUVECs to fibrin. Additionally, the binding of RGD-containing snake venom peptides to HUVECs was both RGD- and divalent-cation-dependent. The IC50S for inhibition of HUVEC attachment to fibrin were 0.09 microM (rhodostomin), 1.54 microM (trigramin) and 1.64 microM (halysin). These results indicate that fibrin mediated support of cell attachment is independent of the cleavage of FPB from fibrinogen. HUVEC attachment to fibrinogen was almost completely inhibited by RGD-containing peptides and by antibodies against alpha v beta 3. In contrast, the attachment to fibrin was partially resistant to RGD-containing peptides and to the monoclonal antibodies against integrin alpha v beta 3. However, alpha v beta 3 is the major receptor mediating HUVEC attachment to fibrin.
Assuntos
Endotélio Vascular/citologia , Fibrina/metabolismo , Fibrinogênio/metabolismo , Oligopeptídeos/farmacologia , Fragmentos de Peptídeos/farmacologia , Venenos de Serpentes/farmacologia , Sequência de Aminoácidos , Adesão Celular/efeitos dos fármacos , Células Cultivadas , Venenos de Crotalídeos/farmacologia , Endotélio Vascular/metabolismo , Humanos , Peptídeos e Proteínas de Sinalização Intercelular , Dados de Sequência Molecular , Peptídeos/farmacologia , Receptores de Vitronectina/metabolismo , Veias UmbilicaisRESUMO
Synaptic boutons originating from the trigeminal principal sensory nucleus (PrV) and the subnucleus interpolaris (SpI) which contact rat ventral posteromedial (VPM) neurons are similar in appearance. They are large boutons and contain a moderate packing density of round synaptic vesicles and established asymmetric (Gray type I) synaptic contacts principally on dendrites occasionally on somata. These boutons are similar to RL boutons of dorsal column nuclei and spinothalamic tract origin found in the ventral posterolateral thalamic nucleus. The boutons of PrV and SpI origin have an overlapping distribution on proximal dendrites of VPM neurons. Double labeling using degeneration and WGA-HRP shows that boutons from PrV and SpI contact the same VPM neurons confirming there is convergence of trigeminal afferents in VPM.
Assuntos
Neurônios Aferentes/fisiologia , Núcleos Talâmicos/fisiologia , Nervo Trigêmeo/fisiologia , Vias Aferentes/citologia , Vias Aferentes/fisiologia , Animais , Histocitoquímica , Peroxidase do Rábano Silvestre , Masculino , Ratos , Ratos Sprague-Dawley , Núcleos Talâmicos/citologia , Nervo Trigêmeo/citologia , Conjugado Aglutinina do Germe de Trigo-Peroxidase do Rábano Silvestre , Aglutininas do Germe de TrigoRESUMO
A rabbit polyclonal antibody (91-01) was raised against recombinant human glia maturation factor beta (r-hGMF-beta). The antibody did not cross-react with a number of other growth factors on ELISA test. When compared with the monoclonal antibody G2-09 previously obtained, 91-01 immunoblotted the same protein band in rat brain extract. However, unlike G2-09 which immunostained only astrocytes and Bergmann glia, 91-01 stained neurons as well. Many but not all neurons in the central and peripheral nervous system were positive for GMF-beta. The larger cell population stained by the polyclonal antibody was most likely due to its increased sensitivity, although other explanations are possible. The presence of GMF-beta-like immunoreactivity in both neurons and glia raises the possibility of a wider range of cell-cell interaction than was previously considered.
Assuntos
Anticorpos/imunologia , Inibidores do Crescimento/análise , Proteínas do Tecido Nervoso/análise , Neuroglia/química , Neurônios/química , Animais , Especificidade de Anticorpos/imunologia , Western Blotting , Ensaio de Imunoadsorção Enzimática , Feminino , Fator de Maturação da Glia , Imuno-Histoquímica , Técnicas de Imunoadsorção , Ratos , Ratos Sprague-Dawley , Proteínas Recombinantes/análiseRESUMO
The extracellular signal-regulated protein kinase-1 and -2 (ERK1 and ERK2), also referred to as the p44/42 mitogen-activated protein kinase (p44/42 MAP kinase), plays an essential role in neuronal signal transduction, but its function involved in nociceptive response has not been deeply studied yet. Here we report immunohistochemical evidence that p44/42 MAPK might be critical in nociceptive response. We found that after formalin was injected into the perioral skin of the upper lip of mice, the number of activated p44/42 MAPK-like immunoreactive neurons was significantly increased in the laminae I and II of the caudal subnucleus of the trigeminal spinal nucleus (Sp5C). The positive neurons and fibers were mostly concentrated in the middle portion of Sp5C dorsoventrally, where the afferent fibers innervating the skin of the upper lip are terminated. The reactive products were localized in perikarya, dendrites, nuclei, and diffusely in the neuropil. The present result suggests that p44/42 MAPK may be important in the transmission and modulation of noxious information in Sp5C.
Assuntos
Proteína Quinase 1 Ativada por Mitógeno/metabolismo , Proteínas Quinases Ativadas por Mitógeno/metabolismo , Dor/metabolismo , Núcleo Inferior Caudal do Nervo Trigêmeo/metabolismo , Animais , Fixadores , Formaldeído , Masculino , Camundongos , Camundongos Endogâmicos BALB C , Proteína Quinase 3 Ativada por Mitógeno , Dor/induzido quimicamenteRESUMO
After fluorescent tracers were applied to the inferior alveolar nerve and the masseter nerve on the same side of the rat, double-labeled neurons were observed in the caudal part of the mesencephalic trigeminal nucleus (Vme), reflecting simultaneous innervation of both the periodontal ligaments and masseter muscle spindles by collaterals of peripheral processes of single Vme neurons.
Assuntos
Mesencéfalo/fisiologia , Neurônios/fisiologia , Nervo Trigêmeo/fisiologia , Animais , Feminino , Imunofluorescência , Mesencéfalo/citologia , Vias Neurais/citologia , Vias Neurais/fisiologia , Ratos , Ratos Endogâmicos , Nervo Trigêmeo/citologiaRESUMO
Morphological substrates for interactions between gamma-aminobutyric acid (GABA) and substance P upon neurons expressing substance P receptor (SPR) in the nucleus of the solitary tract (NST) were investigated by immunocytochemical electron microscopy. In the NST of the rat, many GABA-like immunoreactive axon terminals were in symmetric synaptic contacts with dendritic profiles; they were observed on nearly a half of the SPR-like immunoreactive dendritic profiles in the medial part of the caudal half of the NST.
Assuntos
Neurônios/química , Receptores da Neurocinina-1/análise , Núcleo Solitário/química , Ácido gama-Aminobutírico/fisiologia , Animais , Feminino , Imuno-Histoquímica , Masculino , Microscopia Imunoeletrônica , Neurônios/fisiologia , Neurônios/ultraestrutura , Pressorreceptores/fisiologia , Ratos , Ratos Sprague-Dawley , Núcleo Solitário/citologia , Sinapses/fisiologiaRESUMO
The aim of this study was to investigate the allelic association of a single nucleotide polymorphism in exon 1 of the cytotoxic T-lymphocyte antigen-4 (CTLA4) gene with rheumatoid arthritis (RA) in Chinese people. One hundred and eighty-six unrelated adults with RA and 203 randomly selected normal adults were studied. All were ethnic Chinese living in Taiwan. The CTLA4 A-G polymorphism was genotyped with a polymerase chain reaction (PCR) and digestion with the restriction enzyme BstEII. The genotype and allele frequencies of CTLA4 in patients with rheumatoid arthritis differed significantly from those of adult controls (P=0.022 and P=0.037, respectively). Genotype CTLA4 49 G/G and allele G were associated with an increased risk of RA (RR=1.72, 95% CI=1.15-2.57, P=0.008; RR=1.39, 95% CI=1.02-1.89, P=0.037, respectively), whereas genotype A/G and allele A were associated with protection against RA (RR=0.58, 95% CI=0.39-0.87, P=0.008 and RR=0.72, 95% CI=0.53-0.98, P=0.037, respectively). We concluded that, the CTLA4 49 A-G polymorphism is associated with RA in Chinese patients from Taiwan.