Objective To observe the effects of hypoxia on the expression of connective tissue growth factor(CTGF)and matrix metalloproteinase 9(MMP-9)in lung fibroblasts at different time points.Methods Fibroblasts were cultured at hypoxic condition 0,1.5,3,6,12 h respectively.CTGF mRNA and MMP-9 mRNA level were detected in each group by reverse transcription-polymerase chain reaction(RT-PCR).The concen- tration of CTGF and MMP-9 protein in fibroblasts supernatant were determined using enzyme-linked im- munosorbent assay(ELISA).Results Hypoxia stimulated fibroblasts increased the level of CTGF mRNA with- in 1.5 h,and the levels remained at a plateau up to 6 h,and then decreased by 12 h.The level of MMP-9 mRNA increased significantly within 3 h,and the levels kept the trend for increasing.ELISA revealed that the levels of both CTGF and MMP-9 protein/cell in medium conditioned by fibroblasts exposed to hypoxia were maximal at 12 h.The level of MMP in the CTGF-Ab treated groups was significantly decreased compared to the untreated groups.Conclusions These findings suggest that hypoxia stimulates fibroblasts to release CTGF as a mitogen factor,which initiates the fibrosis cascade and airway remodeling by regulating the balance of extracellular ma- trix synthesis and degradation via MMP-9 which is secreted by fibroblast cells in response to CTGF.

The expression of specific genes in sex chromosomes is the basis of sex-specific membrane protein in mammalian spermatozoa. The gene expression products are shared among spermatozoa through intercellular bridges, however, the phenomena of male transmission-ratio distortion and sex ratio distortion proved that differential proteins exist between X and Y spermatozoa. In addition, the existence of sex-specific proteins was confirmed by the separation experiment of X/Y chromosome bearing spermatozoa and the detection result of sex specific proteins. At the same time, it was also confirmed that the difference of the sex-specific protein is weak . The advance of separation techniques as well as the integration and optimization among these techniques has made it possible to separate sex-specific membrane proteins in mammalian spermatozoa.

In this study, cardiotonic and cardiotoxic effects of Buthus martensi Karsch (BmK) I, a modulator of voltage-gated sodium channels, were investigated on the isolated rat hearts. The results showed that BmK I evoked complex effects characterized by a change in both cardiac mechanical and electrical activity. Langendorff perfusion showed that: (1) maximal left ventricular developed pressure (LVDP(max)) and dp/dt(max) were markedly increased by BmK I (0.5-10 micromol/L) in a dose-dependent manner (n=6, P<0.05), positive chronotropic effects were also induced by BmK I (n=6, P<0.05); (2) negative inotropic action and bradycardia could be elicited at a larger dose of BmK I (20 micromol/L); (3) the coronary flow varied inversely with the positive inotropic effects, coronary flow reduced during positive inotropic effects from 14.5 to 8.6 ml/min after administration of 500 nmol/L BmK I (n=6, P<0.05). In addition, tachycardia and complex cardiac arrhythmias were induced by BmK I (0.5-10 micromol/L). The modulating of BmK I on the heart mechanical, electrical activity could be partially recovered after washing. As propranolol was applied to block the release of catecholamines before administration of BmK I, suggesting that the changes in cardiac mechanical and electrical activity induced by BmK I might not due to catecholamine release from the nerve terminal and subsequent stimulation of the beta-adrenoceptor but attributable to the modulation of BmK I on cardiac voltage-gated sodium channels.
Action Potentials ; drug effects ; Animals ; Electrophysiology ; In Vitro Techniques ; Insect Proteins ; Male ; Myocardial Contraction ; drug effects ; NAV1.5 Voltage-Gated Sodium Channel ; Neurotoxins ; pharmacology ; Patch-Clamp Techniques ; Rats ; Rats, Sprague-Dawley ; Scorpion Venoms ; pharmacology ; Sodium Channel Blockers ; pharmacology ; Sodium Channels ; drug effects

Female ; Humans ; Hypoparathyroidism ; blood ; diagnosis ; drug therapy ; Infant ; Infant, Newborn ; Male ; Parathyroid Hormone ; blood ; Retrospective Studies ; Vitamin D ; therapeutic use

The technique introduced in this paper is applied in the endocardial catheter operation, which describes the 3D heart model reconstruction before the operation for the endocardial navigation. After a series of CT images of the thorax are processed, an accurate 3D endocardial model can be reconstructed. At first, the series of 2D CT images are preprocessed for denoising and the enhancement,then they are constructed as the volume data. After the region growing segmentation in the 3D volume data according to the grey value of the voxel in the heart cavity, the heart surface rendering is got and the 3D model of endocardial cavity is reconstructed.
Cardiac Catheterization ; methods ; Imaging, Three-Dimensional ; Models, Cardiovascular ; Tomography, X-Ray Computed ; methods

Aim To investigate the age-related changes of TrkB mRNA in hippocampal formation of aged rats,and the effects of ginsenosides(GS),and provide reliable experimental evidence for anti-aging.Methods 24 Wistar female rats were randomly divided into 3 groups: Young,aged and GS group(fed with GS from 17 to 27 months).In situ hybridization(ISH) method was applied into qualifying and quantitating the TrkB mRNA expression in hippocampal formation.Results TrkB mRNA expression in aged CA3,CA1 and dentate gyrus decreased by 24.2%,13.4% and 50.6%(P

Female ; Humans ; Kidney Neoplasms ; complications ; pathology ; Ovarian Neoplasms ; pathology ; Wilms Tumor ; complications ; pathology ; Young Adult

OBJECTIVETo analyze the relationship of anxiety state with CD4(+) level and CD4(+)/CD8(+) ratio and to observe the effect of Chinese medicine (CM) treatment on anxiety in chronic hepatitis B (CHB) patients.

METHODSThe anxiety state of 120 CHB patients was evaluated based on Hamilton Anxiety Scale (HAMA) scoring. According to the scores, 63 patients with scores ≥14 were classified to anxiety and 57 patients with scores <14 to non-anxiety. The differences in CD4(+) cells and CD4(+)/CD8(+) ratio between patients with anxiety and non-anxiety were analyzed. Moreover, 63 patients with anxiety were randomized into two groups: 31 in the control group were treated with lamivudine (100 mg per day) alone and 32 in the observation group were given equal dosage lamivudine combined with CM treatment depending on syndrome differentiation, all for 12 weeks. The effects of treatment on anxiety state and T-lymphocyte subsets as well as its impact on some CHB-related indices were observed and compared.

RESULTSThe anxiety state of CHB patients was negatively correlated with CD4(+) and CD4(+)/CD8(+); the level of CD4(+) in patients with anxiety was significantly lower than that in non-anxiety patients (P<0.01 or P<0.05). After treatment, anxiety state in the observation group was significantly improved, with their HAMA scores significantly lowered (P<0.01), and the levels of CD4(+) and CD4(+)/CD8(+) were significantly higher than those in the control group (P<0.05 or P<0.01). Moreover, the alanine transaminase recovery rate and the HBV-DNA-negative conversion rate in the observation group were significantly higher than those in the control group, respectively (P<0.05).

CONCLUSIONSThe anxiety state of CHB patients was related to CD4(+) and CD4(+)/CD8(+) levels. CM treatment could improve the anxiety state and showed certain regulatory effect on the patients' immune system.

Anxiety ; immunology ; therapy ; CD4-CD8 Ratio ; Hepatitis B, Chronic ; immunology ; psychology ; therapy ; Humans ; T-Lymphocyte Subsets

ObjectiveTo investigate the effect of hyperbaric oxygen (HBO) on proliferation and differentiation of endogenous neural stem cells after acute spinal cord half cut-off in rats. MethodsThe differences of proliferation and differentiation of endogenous neural stem cells between injured group and intervention group were compared. ResultsThere were remarkable differences between injured group and intervention group. ConclusionHBO can promote the proliferation and differentiation of the neural stem cells in rats after spine cord injury.

Objective To understand the reliability and validity on SF-36 scale and the quality of life (QoL) among patients with advanced-schistosomiasis in Jiangsu province.Methods Cluster sampling method was used to choose 586 advanced-schistosomiasis patients who were registered in Jiangsu province.Questionnaire including SF-36 module,was used for face to face interview on the patients.Statistical analyses were made to assess the results,including correlation analysis,reliability analysis,factor analysis,t-test and one-way ANOVA.Results The split-half reliability coefficient was 0.92,P＜0.001 and the internal consistency reliability was 0.90,with the range of Cronbach' α coefficient on each dimension was from 0.69 to 0.98.Through principal component analysis,two factors were identified,with the accumulative contribution rate as 67.37％.SF-36 showed certain discriminant validity to distinguish groups in different economic levels.Compared with the domestic norm data,the scores of SF-36 on those patients were generally lows.Conclusion SF-36 had good reliability and good criterion validity,with a certain degree of discriminant validity,but with poor constructs validity.Level of QoL of patients with advanced schistosomiasis in Jiangsu was low because of being chronically ill,that called for more strategies to improve the QoL of patients.