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1.
Zhonghua Wai Ke Za Zhi ; 57(12): 898-901, 2019 Dec 01.
Artigo em Chinês | MEDLINE | ID: mdl-31826592

RESUMO

Objective: To examine the short-term outcomes of minimally invasive reoperation for severe tricuspid regurgitation after left-sided valve surgery. Methods: From January 2015 to December 2018, a total of 89 patients with severe tricuspid regurgitation after left-sided valve surgery received reoperation in Department of Cardiovascular Surgery, Zhongshan Hospital, Fudan University were included in this study. There were 21 males and 68 females, aging of (56.4±7.9) years (range: 41 to 74 years). The interval between previous left-sided valve surgery and tricuspid reoperation was (14.1±6.1) years (range: 4 to 33 years). A combination of multiple minimally invasive techniques were adopted, including endoscopy-assist right minithoracotomy approach, peripheral cannulation strategy with the vacuum-assist single venous drainage technique, heart beating technique, and temporary percutaneous pacemaker implantation, with a concomitant enhancement in preoperative right cardiac function optimization. Results: All patients received minimally invasive isolated tricuspid valve replacement (n=81) or tricuspid valve repair (n=8). After the application of multiple minimally invasive techniques, the operative mortality rate was only 3.4% (3/89). The causes of death were progressive right heart failure with multiorgan failure (n=1) and low cardiac output associated with postoperative bleeding (n=2). Regarding to the perioperative complications, renal replacement therapy rate was 5.6% (5/89), permanent pacemaker implantation rate was 1.1% (1/89), and the incidence of stroke was 0. Mechanical ventilation time was 24(24) hours, ICU stay time was 2.5 (3.0) days (M(Q(R))). During the short-term follow-up, there were no case of severe tricuspid regurgitation, 2 cases of moderate regurgitation, 4 cases of mild-to-moderate regurgitation. Conclusions: For severe tricuspid regurgitation after left-sided valve surgery, the advanced minimally invasive techniques can significantly reduce the operative mortality and morbidity. Minimally invasive bioprosthetic tricuspid valve replacement is a reliable alternative for severe tricuspid regurgitation after left-sided valve surgery.


Assuntos
Procedimentos Cirúrgicos Cardíacos/efeitos adversos , Insuficiência da Valva Tricúspide/cirurgia , Valva Tricúspide/cirurgia , Adulto , Idoso , Feminino , Doenças das Valvas Cardíacas/cirurgia , Implante de Prótese de Valva Cardíaca/efeitos adversos , Implante de Prótese de Valva Cardíaca/métodos , Humanos , Masculino , Pessoa de Meia-Idade , Procedimentos Cirúrgicos Minimamente Invasivos , Reoperação , Resultado do Tratamento , Insuficiência da Valva Tricúspide/etiologia
2.
Zhonghua Wai Ke Za Zhi ; 57(12): 947-950, 2019 Dec 01.
Artigo em Chinês | MEDLINE | ID: mdl-31826601

RESUMO

Late tricuspid regurgitation after left-sided valve surgery can negatively affect long-term prognosis. The surgical timing and strategy of tricuspid valve reoperation will have important impact on the surgical outcomes. However, there is no clear recommendations of the surgical timing for this condition in the current guidelines. Generally, tricuspid valve reoperation should be performed before irreversible right heart failure occurs. Although tricuspid valve repair is the first choice for tricuspid regurgitation, bioprosthetic tricuspid valve replacement might be a reliable alternative when tricuspid leaflets have severe rheumatic damage or right ventricle and tricuspid annulus significantly dilate. Combined minimally invasive surgical techniques, including right minithoracotomy approach, accessing the right atrium directly through the pericardium with limited dissection, peripheral cannulation strategy with the vacuum-assist single venous drainage technique and heart beating technique, can significantly decrease the operative mortality and postoperative bleeding. With development of interventional therapy, transcatheter tricuspid valve repair or replacement may become alternatives for tricuspid regurgitation after left-sided valve surgery in the future.


Assuntos
Procedimentos Cirúrgicos Cardíacos/efeitos adversos , Insuficiência da Valva Tricúspide/cirurgia , Bioprótese , Próteses Valvulares Cardíacas , Implante de Prótese de Valva Cardíaca/efeitos adversos , Humanos , Reoperação , Resultado do Tratamento , Valva Tricúspide/cirurgia , Insuficiência da Valva Tricúspide/etiologia
3.
Zhonghua Wai Ke Za Zhi ; 56(12): 910-915, 2018 Dec 01.
Artigo em Chinês | MEDLINE | ID: mdl-30497118

RESUMO

Objective: To report on the two years outcome of Chinese multi-center study of the treatment of high risk non-calcified pure aortic regurgitation with transcatheter heart valve replacement (TAVR) using domestic made J-Valve™ system. Methods: The national multi-center clinical study of the treatment of high risk non-calcified pure aortic regurgitation with transcatheter heart valve replacement using domestic made J-Valve™ system was conducted during the period from April 2014 to July 2015. The follow-up time was up to 2 years. Forty-three cases with predominant aortic valve regurgitation were enrolled for transapical implantation of the J-Valve™ system from 3 Chinese centers, including 16 patients from Zhongshan Hospital, Fudan University, 23 patients from West China Hospital, Sichuan University, and 4 patients from Fuwai Cardiovascular Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College. There were 30 males and 13 females in this cohort. The age of the patients was (74±6) years (range: 61 to 84 years). The patiens were all sympotmatic preoperatively. All patients were considered at prohibitive or high risk for surgical valve replacement (Logistic European System for Cardiac Operative Risk Evaluation of (25.5±5.3)%, range: 20.0% to 44.4%) after evaluation by an interdisciplinary heart team. Comprehensive clinical and echocardiographic assessments were scheduled before discharge and at 30 days, 12 months, and 24 months after the procedure. Results: One patients was converted to surgical aortic valve replacement (SAVR) due to valve embolism into the arch. The other 42 cases had J-Valve™ systems implanted successfully. One patient died from multi-organ disorder due to paravalvular leak (PVL) during perioperative period. There was no acute myocardial infarction, stroke or coronary obstruction during the perioperative period. The median follow-up time was 725 days (range: 6 to 1 082 days). There were 5 patients died during the 2 years, follow-up, 2 patients had stroke, 2 patients had permanent pacemaker implanted. Three patients had valve related reinterventions: One for intraoperative valve embolism into the aortic arch followed by a conversion to SAVR which was mentioned above. One patient underwent SAVR on the postoperative day 6 due to moderate PVL and ventricular dysfunction. One patient underwent SAVR 6 months after primary procedure due to prosthesis thrombosis and severe aortic valve stenosis.Thirty-six patients with J-valve™ implanted survived to the latest echocardiogram follow-up, 25 patients had trivial or less PVL, 9 patients had mild PVL, and the transvalvular gradient after valve implantation was favorable at (9.8±5.8) mmHg (1 mmHg=0.133 kPa). Conclusions: Transapical implantation of domestic made J-Valve™ transcatheter heart valve system for patients with predominant aortic regurgitation has a excellent early outcome. This novel technology is safe and effective.


Assuntos
Insuficiência da Valva Aórtica , Implante de Prótese de Valva Cardíaca , Substituição da Valva Aórtica Transcateter , Idoso , Idoso de 80 Anos ou mais , Valva Aórtica , Insuficiência da Valva Aórtica/cirurgia , Estenose da Valva Aórtica , China , Feminino , Próteses Valvulares Cardíacas , Humanos , Masculino , Pessoa de Meia-Idade , Desenho de Prótese , Fatores de Risco , Resultado do Tratamento
4.
Zhonghua Yi Xue Za Zhi ; 98(29): 2341-2345, 2018 Aug 07.
Artigo em Chinês | MEDLINE | ID: mdl-30107693

RESUMO

Objective: To compare the characteristics of X-ray, CT and MRI of Brucella spondylitis and tuberculous spondylitis and its significance for differential diagnosis. Methods: A total of 10 cases of Brucella spondylitis and 20 cases of tuberculous spondylitis confirmed from the clinical, laboratory or pathological department were enrolled between January 2014 and August 2017 in the Fifth Affiliated Hospital of Sun Yat-sen University and the Third Affiliated Hospital of Southern Medical University. The CT, MRI findings were retrospectively analyzed to improve the differential diagnosis of these two diseases. Results: Of the 10 cases of Brucella spondylitis, 8 were located only in the lumbosacral vertebrae, 1 in the thoracic vertebrae only, 1 in the cervical and thoracic vertebrae, 8 with invasive bone destruction, and 8 with narrowed intervertebral space. In 9 cases of intervertebral disc destruction, 7 cases developed paravertebral abscesses, 3 cases had sclerotic edges, all cases had no vertebral body flattening, 5 cases invaded the accessory, 4 cases formed sequestrum, and 6 cases invaded the spinal canal. There were 3 cases showing invasion of surrounding muscles. In 20 cases of tuberculous spondylitis, 12 cases were located in the lumbosacral vertebrae, 6 cases in the thoracic vertebrae only, 1 involved the thoracic vertebrae and lumbosacral vertebrae, 1 involved the neck, chest, and lumbosacral vertebrae. Bone destruction of bone, 19 cases of intervertebral space narrowing, 20 cases of intervertebral disc destruction, 18 cases of paraspinal abscess formation, 10 cases of sclerotic edge formation, 6 cases of vertebral body flattened, 16 cases of invading attachment. There were 17 cases of sequestrum formation, 13 cases of invasion of the spinal canal, and 12 cases of violation of surrounding muscles. There were statistical differences between the two types of imaging signs such as the type of vertebral destruction and the presence or absence of sequestrum. Conclusion: The type of vertebral destruction and the presence or absence of imaging features such as sequestrumwill facilitate the differential diagnosis of Brucella spondylitis and tuberculous spondylitis.


Assuntos
Espondilite , Tuberculose da Coluna Vertebral , Brucella , Diagnóstico Diferencial , Humanos , Imagem por Ressonância Magnética , Estudos Retrospectivos , Vértebras Torácicas
5.
Zhonghua Yi Xue Za Zhi ; 98(27): 2198-2202, 2018 Jul 17.
Artigo em Chinês | MEDLINE | ID: mdl-30032526

RESUMO

Objective: To investigate the impact of TGF-ß3 on the chondrogenesis of bone marrow mesenchymal stem cells (BM-MSCs) under hypoxia environment. Methods: BM-MSCs were obtained from SD rat tibias and femora and cultured with whole bone marrow adherent method. Cell surface antigens were analyzed by flow cytometry and the multiple-directional differentiation capabilities were detected with special differentiation agents to affirm the reality of BM-MSCs. Under normoxia or hypoxia condition, BM-MSCs were induced with TGF-ß3 or not. Then, alcian blue and immunofluorescence staining were performed to evaluate the expression level of aggrecan, collagen Ⅱ. qRT-PCR analysis were performed to analyze the expression of aggrecan, collagen Ⅱ and collagen Ⅹ. qRT-PCR and Western blot analysis was performed to detect the mRNA and protein level of HIF-1α, collagenⅡ and ß-catenin. Results: BM-MSCs were fibroblast-like shape and had ablities of osteogeic, adipogenic and chondrogenic differentiation, with the expression of CD(29, )CD(44) and CD(90) but not CD(45). Alcian blue and immunofluorescence staining showed that BM-MSCs strongly expressed the aggrecan and collagen Ⅱ with the presence of TGF-ß3 under hypoxia condition. qRT-PCR analysis showed the mRNA expression levels of collagen Ⅱ, aggrecan and collagen Ⅹ were up-regulated at 2.46, 2.20 and 1.80 folds, comparing with control group (all P<0.05). Western blot analysis showed that the protein levels of HIF-1α, collagenⅡ in BM-MSCs were up-regulated with the presence of TGF-ß3 under hypoxia condition, but ß-catenin level was down-regulated. Conclusion: TGF-ß3 promotes the chondrogenic differentiation ability of BM-MSCs under hypoxia condition, which may be relative with the inhibition of Wnt/ß-catenin signaling pathway.


Assuntos
Células-Tronco Mesenquimais , Agrecanas , Animais , Células da Medula Óssea , Diferenciação Celular , Hipóxia Celular , Células Cultivadas , Condrogênese , Subunidade alfa do Fator 1 Induzível por Hipóxia , Ratos , Ratos Sprague-Dawley , Fator de Crescimento Transformador beta3
6.
Zhonghua Fu Chan Ke Za Zhi ; 53(2): 77-81, 2018 Feb 25.
Artigo em Chinês | MEDLINE | ID: mdl-29534374

RESUMO

Objective: To observe and analyze the difference of serum immunoglobulin IgA, IgG, IgM, ß2-microglobulin and transferrin in pre-eclampsia (PE) and pregnancies complicated with chronic kidney disease. Methods: Totally 46(40.0%) pregnancies with PE (PE group), 36(31.3%) pregnancies with chronic kidney disease (chronic kidney disease group) and 33(28.7%) normal pregnancies with normal blood pressure and proteinuria without any complication (control group) delivered in Renji Hospital were recruicted in this study from February 2017 to July 2017. Serum IgA, IgG, IgM, ß2-microglobulin and transferrin levels were detected. Correlation tests were conducted between these indicators and blood pressure, 24 hours proteinuria value and delivery weeks. Results: (1) Comparison of general situation of pregnancies in the 3 groups: there were no significant difference in the age and child bearing history between the 3 groups (all P>0.05), while there was a significant difference in the blood pressure and deliver week (all P<0.01). There was no significant difference in 24 hours proteinuria values between PE group and chronic kidney disease group (Z=-0.187, P=0.852). (2) Comparison of serum immunoglobulin, ß2-microglobulin and transferrin levels in pregnant women with three groups: serum IgA level in chronic kidney disease group was significantly higher than those in PE and control groups [(2.4±0.9) vs (1.8±0.9) vs (1.6±0.6) g/L; F=9.959, P<0.01]. The serum IgG and IgM values had no significant difference between the 3 groups (all P>0.05). Serum ß2-microglobulin in chronic kidney disease group was significantly higher than those in PE and control groups [(4.0±2.6) vs (2.7±0.7) vs (2.0±0.5) mg/L; F=15.892, P<0.01]. Serum transferrin in chronic kidney disease group was significantly lower than those in PE and control groups [(3.0±0.8) vs (3.7±1.1) vs (3.6±0.6) g/L; F=6.284, P<0.01]. (3) The correlation between serum immunoglobulin, ß2-microglobulin, transferrin and blood pressure, proteinuria value and delivery weeks in PE group: the blood pressure level was not correlated with serum IgA, ß2-microglobulin and transferrin values in PE group (all P> 0.05). So, 24 hours proteinuria value was positively correlated with ß2-microglobulin (r=0.557, P<0.01), which was negatively correlated with transferrin (r=-0.442, P<0.01) and was not correlated with IgA(r=0.089, P=0.556). There was a negative correlation between delivery weeks and ß2-microglobulin (r=-0.328, P=0.026), and positive correlation with transferrin (r=0.315, P=0.035) and no correlation with IgA (r=-0.169, P=0.260). (4) The correlation between serum immunoglobulin, ß2-microglobulin, transferrin and blood pressure, proteinuria value and delivery weeks in chronic kidney disease group: the blood pressure level was positively correlated with ß2- microglobulin (systolic pressure: r=0.598, P<0.01; diastolic pressure:r=0.557, P<0.01), which was not correlated with IgA and transferrin in chronic kidney disease group (all P>0.05). So, 24 hours proteinuria value was positively correlated with ß2-microglobulin and IgA (r=0.568, r=0.330, both P<0.05), and not correlated with transferrin (r=0.255, P=0.133). Delivery weeks had a negative correlation with ß2-microglobulin (r=-0.574, P<0.01), while it had a positive correlation with transferrin (r=0.369, P=0.027). No correlation was found between delivery weeks and IgA values (r=-0.257, P=0.131). Conclusion: The serum levels of IgA, ß2-microglobulin and transferrin in PE and pregnancies with chronic kidney disease are significantly different, which may provide clinical value for the diagnosis of PE and pregnancies with chronic kidney disease in future.


Assuntos
Pressão Sanguínea/fisiologia , Imunoglobulinas/sangue , Pré-Eclâmpsia/sangue , Complicações Cardiovasculares na Gravidez/sangue , Insuficiência Renal Crônica/metabolismo , Transferrina/análise , Microglobulina beta-2/análise , Estudos de Casos e Controles , Feminino , Humanos , Hipertensão/sangue , Parto , Gravidez , Transferrina/metabolismo
7.
Zhonghua Yi Xue Za Zhi ; 97(41): 3244-3249, 2017 Nov 07.
Artigo em Chinês | MEDLINE | ID: mdl-29141363

RESUMO

Objective: To investigate the features of apparent diffusion coefficient (ADC) histogram parameters based on entire tumor volume data in high resolution diffusion weighted imaging of nasopharyngeal carcinoma (NPC) and to evaluate its correlations with cancer stages. Methods: This retrospective study included 154 cases of NPC patients[102 males and 52 females, mean age (48±11) years]who had received readout segmentation of long variable echo trains of MRI scan before radiation therapy. The area of tumor was delineated on each section of axial ADC maps to generate ADC histogram by using Image J. ADC histogram of entire tumor along with the histogram parameters-the tumor voxels, ADC(mean), ADC(25%), ADC(50%), ADC(75%), skewness and kurtosis were obtained by merging all sections with SPSS 22.0 software. Intra-observer repeatability was assessed by using intra-class correlation coefficients (ICC). The patients were subdivided into two groups according to cancer volume: small cancer group (<305 voxels, about 2 cm(3)) and large cancer group (≥2 cm(3)). The correlation between ADC histogram parameters and cancer stages was evaluated with Spearman test. Results: The ICC of measuring ADC histogram parameters of tumor voxels, ADC(mean), ADC(25%), ADC(50%), ADC(75%), skewness, kurtosis was 0.938, 0.861, 0.885, 0.838, 0.836, 0.358 and 0.456, respectively. The tumor voxels was positively correlated with T staging (r=0.368, P<0.05). There were significant differences in tumor voxels among patients with different T stages (K=22.306, P<0.05). There were significant differences in the ADC(mean), ADC(25%), ADC(50%) among patients with different T stages in the small cancer group(K=8.409, 8.187, 8.699, all P<0.05), and the up-mentioned three indices were positively correlated with T staging (r=0.221, 0.209, 0.235, all P<0.05). Skewness and kurtosis differed significantly between the groups with different cancer volume(t=-2.987, Z=-3.770, both P<0.05). Conclusion: The tumor volume, tissue uniformity of NPC are important factors affecting ADC and cancer stages, parameters of ADC histogram (ADC(mean), ADC(25%), ADC(50%)) increases with T staging in NPC smaller than 2 cm(3).


Assuntos
Carcinoma/diagnóstico por imagem , Imagem de Difusão por Ressonância Magnética , Neoplasias Nasofaríngeas/diagnóstico por imagem , Adulto , Feminino , Humanos , Interpretação de Imagem Assistida por Computador , Masculino , Pessoa de Meia-Idade , Carcinoma Nasofaríngeo , Estudos Retrospectivos
8.
Zhonghua Yi Xue Za Zhi ; 97(17): 1303-1306, 2017 May 09.
Artigo em Chinês | MEDLINE | ID: mdl-28482430

RESUMO

Objective: To evaluate the characteristics of high resolution diffusion-weighted imaging(DWI) using readout segmentation of long variable echo trains (RESOLVE ) for nasopharyngeal carcinoma (NPC). Methods: A total of 131 with newly diagnosed NPC patients from the 5th Affiliated Hospital of Sun Yat-sen University were included in this study from October 2013 to April 2016.DWI using RESOLVE technique was performed. The signal intensity (SI(lesion)), and mean(ADC(mean)), maximum(ADC(max)), minimum (ADC(min))ADCs of NPC were calculated. The signal intensity (SI(normal))and ADC (ADC(normal))of normal nasopharyngeal tissue were calculated. These quantitative parameters of NPC and normal nasopharyngeal tissue were compared.Statistical difference of ADC(mean), ADC(max) and ADC(min) between the clinical tumor stages were assessed. Results: On the DWI, all NPCs were clearly shown as high signal intensity relative to the surrounding normal nasopharyngeal structure(F=70.019, P=0.000). The ADC(mean)(F=20.442, P=0.000), ADC(max)(F=35.374, P=0.000), ADC(min)(F=61.534, P=0.000) in the carcinoma were significantly lower compared with that of normal nasopharyngeal structure. There was no statistically significant difference of ADC(mean), ADC(max) and ADC(min) (P>0.05)in different clinical stages of NPC. Conclusion: NPC can be clearly detected by RESOLVE-DWI, but the ADC(mean), ADC(max) and ADC(min) can not be used for differentiating the clinical stage of NPC.


Assuntos
Carcinoma/diagnóstico por imagem , Imagem de Difusão por Ressonância Magnética , Neoplasias Nasofaríngeas/diagnóstico por imagem , Humanos , Carcinoma Nasofaríngeo
9.
Genet Mol Res ; 15(2)2016 May 23.
Artigo em Inglês | MEDLINE | ID: mdl-27323064

RESUMO

The aim of the current study was to evaluate the levels of growth factors in the cerebrospinal fluid (CSF) of patients with autism, after transplantation of human umbilical cord blood mononuclear cells (CBMNCs) and umbilical cord-derived mesenchymal stem cells (UCMSCs). Twenty patients received two CBMNC intravenous and intrathecal infusions, each followed by two UCMSC intrathecal injections. A 2-mL sample of CSF was taken before each intrathecal injection. CSF levels of hepatocyte growth factor (HGF), brain-derived neurotrophic factor (BDNF), nerve growth factor (NGF) and basic fibroblast growth factor (bFGF) were determined by an enzyme-linked immunosorbent assay (ELISA). All data are reported as means ± SD and were analyzed using the SPSS 10.0 software. One-way analysis of variance with post-hoc F- and Q-tests was performed for comparison. HGF, BDNF and NGF levels in the CSF were significantly increased after transplantation (P < 0.05), while bFGF levels did not change significantly. Therefore, transplantation of CBMNCs and UCMSCs could increase HGF, BDNF and NGF levels in the CSF of patients with autism.

10.
J Pediatr Urol ; 12(3): 154.e1-7, 2016 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-26944608

RESUMO

BACKGROUND: Conventional urodynamics (CU) is a highly standardized evaluation of lower urinary tract function. However, in pediatric patients there is concern that the reliability of measurements could be influenced by development effects and measurement variability, as well as by the unfamiliar clinical environment. Ambulatory urodynamics (AU) provides an alternative to this - it uses natural filling, is measured over a prolonged period, and is conducted in a child-friendly environment. OBJECTIVE: The aim of this study was to conduct a comparative analysis of AU and CU to evaluate the consistency in voiding patterns obtained with these two methods of urodynamic testing. STUDY DESIGN: Urodynamic parameters obtained by AU and CU methods in 50 pediatric patients aged >5 years were retrospectively analyzed. Voiding patterns were categorized into six types: coordinated contraction, detrusor after-contraction, fluctuated contraction, pre-void contraction, relief voiding, and weak or absent contraction. Voiding patterns were used to determine the repeatability within urodynamic tests and to identify consistency between AU and CU tests. Five urodynamic parameters were quantified and compared between AU and CU: voided volume, flow rate, maximum detrusor pressure, and detrusor pressure at peak flow rate. For inter-observer variation analysis, 100 voiding curves were randomly selected and categorized by two independent observers; inter-observer agreement was evaluated using the kappa statistic. RESULTS: A single pattern of voiding was identified in five patients using AU and 37 using CU. Consistency of a single pattern between AU and CU was identified in three patients, and consistency between a predominant pattern with AU, defined by one type of voiding occurring >50% of one's voids, and a single pattern with CU was identified in 10 patients (summary table). Flow rates were similar between methods; however, higher maximum detrusor pressure and detrusor pressure at peak flow and lower voided volume were recorded with AU. DISCUSSION: AU resulted in more diverse voiding patterns. Along with the differences in measured urodynamic parameters challenges the application of findings from one method to form a clinical diagnosis. Furthermore, CU may not be as sensitive as AU to the variability in lower urinary tract pathophysiology. CONCLUSIONS: More diverse voiding patterns were identified in AU compared with CU, with a lack of consistency in identified voiding pattern in both methods. Therefore, the urodynamic findings in children may have to be analyzed in more detail, taking the variations into account.


Assuntos
Técnicas de Diagnóstico Urológico , Sintomas do Trato Urinário Inferior/fisiopatologia , Urodinâmica , Adolescente , Criança , Feminino , Humanos , Masculino , Estudos Retrospectivos
11.
Genet Mol Res ; 14(3): 8725-32, 2015 Jul 31.
Artigo em Inglês | MEDLINE | ID: mdl-26345804

RESUMO

We aimed to evaluate the levels of growth factors in the cerebrospinal fluid (CSF) of patients with autism after transplantation of umbilical cord blood mononuclear cells (CBMNCs). Fourteen subjects diagnosed with autism received transplantation of CBMNCs first through intravenous infusion, and three times subsequently through intrathecal injections. A 2-mL sample of CSF was taken before each intrathecal injection. CSF levels of nerve growth factor (NGF), vascular endothelial growth factor (VEGF), and basic fibroblast growth factor (bFGF) were determined by enzyme-linked immunosorbent assay. All data are reported as means ± SD and were analyzed using the SPSS 10.0 software. One-way analysis of variance with post-hoc F-and Q-tests were performed for comparisons. NGF levels in the CSF were significantly increased after transplantation (213.54 ± 56.38 after the third versus 28.32 ± 12.22 ng/L after the first transplantation; P < 0.05), while VEGF and bFGF levels did not change significantly. Therefore, transplantation of CBMNCs could increase NGF levels in the CSF of patients with autism.


Assuntos
Transtorno Autístico/líquido cefalorraquidiano , Sangue Fetal/citologia , Leucócitos Mononucleares/transplante , Fator de Crescimento Neural/líquido cefalorraquidiano , Transtorno Autístico/terapia , Criança , Pré-Escolar , Feminino , Fator 2 de Crescimento de Fibroblastos/líquido cefalorraquidiano , Humanos , Masculino , Resultado do Tratamento , Fator A de Crescimento do Endotélio Vascular/líquido cefalorraquidiano
12.
Genet Mol Res ; 14(3): 9306-17, 2015 Aug 10.
Artigo em Inglês | MEDLINE | ID: mdl-26345864

RESUMO

TERMINAL FLOWER1 (TFL1) homologous genes play major roles in maintaining vegetative growth and inflorescence meristem characteristics in various plant species; however, to date, the function of the bamboo TFL1 homologous gene has not been described. In this study, a TFL1 homologous gene was isolated from Bambusa oldhamii and designated as BoTFL1-like. Phylogenetic analysis of TFL1 homologous genes revealed that BoTFL1-like shared more than 90% identity with the TFL1 genes of other Gramineae. RT-PCR analysis showed that the expression level of BoTFL1-like in floral buds was almost 3.5 times higher than in vegetative buds. In 35S::BoTFL1-like transgenic Arabidopsis thaliana plants, the time of flowering was significantly delayed by 5 to 9 days, and development of floral buds and sepals was severely affected compared to wild type Arabidopsis plants. This suggests that the BoTFL1-like gene may play roles in flowering time and flower morphological structure in B. oldhamii. The BoTFL1-like gene driven by the 35S promoter almost fully rescued the phenotype of the tfl1 mutant apart from the number of rosette inflorescences, indicating that the function of BoTFL1-like was similar to TFL1 in Arabidopsis. We conclude the TFL1 gene function has been conserved between B. oldhamii and A. thaliana.


Assuntos
Arabidopsis/genética , Bambusa/genética , Expressão Ectópica do Gene , Flores/genética , Mutação , Fenótipo , Proteínas de Plantas/genética , Sequência de Aminoácidos , Bambusa/classificação , Sequência de Bases , Clonagem Molecular , Modelos Moleculares , Dados de Sequência Molecular , Filogenia , Proteínas de Plantas/química , Conformação Proteica , Alinhamento de Sequência , Análise de Sequência de DNA
13.
Genet Mol Res ; 14(2): 4169-76, 2015 Apr 27.
Artigo em Inglês | MEDLINE | ID: mdl-25966189

RESUMO

The aim of this study was to investigate the selection of plasma exchange (PE) parameters and the safety of children with severe ricinism. The PE parameters and heparin dosage in 7 children with severe ricinism were recorded, and changes in the patients' vital signs and coagulation function were monitored before and after PE. All patients successfully completed PE. The speed of blood flow was 50-80 mL/min, speed of exchange flow was 600-800 mL/h, and isolating rate of blood plasma was 12.5-19.05%. Transmembrane pressure was stable at approximately 100 mmHg, and venous pressure was stable at approximately 95 mmHg. The first dose of heparin was 0.39 ± 0.04 mg/kg, and the maintaining heparin dose was 0.40 ± 0.05 to 0.22 ± 0.03 mg·kg(-1)·h(-1). During the PE process, mean arterial pressure, heart rate, respiratory rate, and pulse oxygen saturation were steady. After PE, the activated partial thromboplastin time and thrombin time prolonged to 2-3 times greater than that before PE. However, no bleeding tendency was seen. For children with severe ricinism, the choice of PE to eliminate the toxin from blood, tissues, and organs was safe and effective.


Assuntos
Semente de Rícino/envenenamento , Troca Plasmática/métodos , Ricina/envenenamento , Coagulação Sanguínea/efeitos dos fármacos , Criança , Feminino , Humanos , Masculino , Tempo de Tromboplastina Parcial , Troca Plasmática/efeitos adversos , Tempo de Trombina
15.
Int J Numer Method Biomed Eng ; 28(4): 401-11, 2012 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-25365655

RESUMO

This paper assumes that a neo-Hookean matrix with neo-Hookean fibres is representative of soft tissue. Under this assumption, a unit cell model is proposed to investigate the fibre-matrix interfacial stress field for biological soft tissue under biaxial loadings. In this unit cell model, the soft tissue is treated as a composite where the matrix is unidirectionally reinforced with a single family of aligned fibres. The results are compared with the model of Guo et al., which accounts for the fibre-matrix interfacial stress field, and Qiu and Pence's model, which does not proceed from the assumption that the fibres are themselves neo-Hookean. It is found that the stress representative of the fibre-matrix interface plays an important role in the deformation of the composite, and the model of Guo et al. underestimates this stress under large biaxial deformation.


Assuntos
Fenômenos Biomecânicos , Elasticidade , Modelos Biológicos , Estresse Mecânico
16.
Proc Inst Mech Eng H ; 225(5): 437-47, 2011 May.
Artigo em Inglês | MEDLINE | ID: mdl-21755774

RESUMO

Hill's one-dimensional three-element model has often been used for formulating a three-dimensional skeletal muscle constitutive model, which generally involves several material parameters. However, only few of these parameters have physical meanings and can be experimentally determined. In this paper, a parametric study of a Hill-type hyperelastic skeletal muscle model is performed. First, the Hill-type hyperelastic skeletal muscle model is formulated, containing 13 material parameters. The values or value ranges of these parameters are discussed. The muscle model is then used to predict the behaviour of New Zealand white rabbit hind leg muscle tibialis anterior and a sensitivity study of several parameters is performed. Results show that some parameters in the muscle model can be experimentally determined, some parameters have their own value ranges and the muscle model can predict the experimental data by tuning the parameters within their value ranges. The results from the sensitivity study can help understand how some parameters influence the total muscle stress.


Assuntos
Modelos Biológicos , Músculo Esquelético/fisiologia , Animais , Fenômenos Biomecânicos/fisiologia , Elasticidade/fisiologia , Análise de Elementos Finitos , Membro Posterior/fisiologia , Coelhos
17.
Comput Methods Biomech Biomed Engin ; 14(12): 1079-88, 2011 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-20924862

RESUMO

Skeletal muscle tissues have complex geometries. In addition, the complex fibre orientation arrangement makes it quite difficult to create an accurate finite element muscle model. There are many possible ways to specify the complex fibre orientations in a finite element model, for example defining a local element coordinate system. In this paper, an alternative method using ABAQUS, which is combination of the finite element method and the non-uniform rational B-spline solid representation, is proposed to calculate the initial fibre orientations. The initial direction of each muscle fibre is specified as the tangent direction of the NURBS curve which the fibre lies on, and the directions of the deformed fibres are calculated from the initial fibre directions, the deformation gradients and the fibre stretch ratios. Several examples are presented to demonstrate the ability of the proposed method. Results show that the proposed method is able to characterise both the muscle complex fibre orientation arrangement and its complex mechanical response.


Assuntos
Modelos Anatômicos , Modelos Biológicos , Contração Muscular/fisiologia , Fibras Musculares Esqueléticas/citologia , Fibras Musculares Esqueléticas/fisiologia , Simulação por Computador , Humanos
18.
Tissue Antigens ; 76(4): 337-8, 2010 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-20545900

RESUMO

A new human leukocyte antigen-B allele, B*51:84 (B*5184), has been found in Taiwan. It differs from B*51:01:01(B*510101) by one nucleotide substitution at codon 145 (CGC →GGC), resulting to one amino acid change (Arginine to Glycine).


Assuntos
Alelos , Antígenos HLA-B/genética , Teste de Histocompatibilidade , Grupo com Ancestrais do Continente Asiático/genética , Sequência de Bases , Genótipo , Antígeno HLA-B51 , Humanos , Dados de Sequência Molecular , Alinhamento de Sequência
19.
J Biomech ; 43(13): 2629-32, 2010 Sep 17.
Artigo em Inglês | MEDLINE | ID: mdl-20566197

RESUMO

In this paper, a visco-hyperelastic skeletal muscle model is developed. The constitutive relation is based on the definition of a Helmholtz free energy function. It is assumed that the Helmholtz energy can be decomposed into volumetric and isochoric parts; furthermore, the isochoric energy can be decoupled into hyperelastic and viscous parts. The model developed involves 14 material parameters and its performance is evaluated by comparing the finite element simulation results with the published experimental studies on the New Zealand white rabbit tibialis anterior muscle. Results show that this model is able to describe the visco-hyperelastic behaviour of both passive and active skeletal muscle tissues under high strain rates (10/s and 25/s).


Assuntos
Modelos Biológicos , Músculo Esquelético/fisiologia , Estresse Mecânico , Animais , Simulação por Computador , Elasticidade , Análise de Elementos Finitos , Coelhos
20.
J Periodontal Res ; 44(3): 338-47, 2009 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-19210333

RESUMO

BACKGROUND AND OBJECTIVE: Membrane type-I matrix metalloproteinase (MMP) and tissue inhibitor of metalloproteinase-2 (TIMP-2) regulate the activation of MMP-2; however, their roles in the activation of MMP-2 in gingiva during treatment with cyclosporine A are still unknown. Therefore, the expressions of membrane type-I MMP and TIMP-2, as well as MMP-2, in gingivae upon treatment with cyclosporine A were examined in vivo and in vitro. MATERIAL AND METHODS: Thirty-four rats were divided into two groups after edentulous ridges were established. The experimental group received 30 mg/kg/d of cyclosporine A and the control group received vehicle. At the end of the experimental period, the rats were killed, the gingivae were obtained and the expression of mRNA and protein of membrane type-I MMP, TIMP-2 and MMP-2 in gingiva were examined using real-time polymerase chain reaction and immunohistochemistry. In human gingival fibroblasts, the activity of MMP-2 and the expression of MMP-2, membrane type-I MMP and TIMP-2 mRNAs were examined (using zymography and reverse transcription-polymerase chain reaction, respectively) after treatment with cyclosporine A. RESULTS: In gingivae of rats, cyclosporine A significantly decreased the expression of mRNA and protein of membrane type-I MMP, but not of TIMP-2. The expression of MMP-2 mRNA was unaffected but the expression of MMP-2 protein showed a significant decrease upon treatment with cyclosporine A. In fibroblast culture medium, the presence of cyclosporine A induced a decrease in MMP-2 activity in a dose-dependent manner. The expression of MMP-2, membrane type-I MMP and TIMP-2 mRNAs in fibroblasts was not significantly affected by cyclosporine A; however, in fibroblasts the ratio of mRNA expression of membrane type-I MMP to that of TIMP-2 decreased as the cyclosporine A dose was increased. CONCLUSION: Cyclosporine A inhibits the expression of membrane type-I MMP in gingiva and it may further reduce the activation of MMP-2.


Assuntos
Ciclosporina/farmacologia , Gengiva/enzimologia , Imunossupressores/farmacologia , Inibidores de Metaloproteinases de Matriz , Inibidores de Proteases/farmacologia , Animais , Sobrevivência Celular/efeitos dos fármacos , Células Cultivadas , Relação Dose-Resposta a Droga , Eletroforese em Gel de Poliacrilamida , Fibroblastos/efeitos dos fármacos , Fibroblastos/enzimologia , Expressão Gênica/efeitos dos fármacos , Gengiva/citologia , Gengiva/efeitos dos fármacos , Crescimento Excessivo da Gengiva/induzido quimicamente , Crescimento Excessivo da Gengiva/enzimologia , Humanos , Masculino , Metaloproteinase 1 da Matriz/biossíntese , Metaloproteinase 14 da Matriz/biossíntese , Metaloproteinase 2 da Matriz/biossíntese , RNA Mensageiro/biossíntese , Ratos , Ratos Sprague-Dawley , Reação em Cadeia da Polimerase Via Transcriptase Reversa , Inibidor Tecidual de Metaloproteinase-2/biossíntese
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