Experiments were carried on cultured neonatal myocardial cells of rat to study the effects of angiotensin Ⅰ(AngⅠ) and Ⅱ (AngⅡ) on the synthesis of DNA, RNA, protein and on the cardiac hypertrophy. It was shown that the incorporation of both ~3H-TdR and ~(14)C-uR increased over a set of time periods after addition of AngⅠ and AngⅡ to the medium. The mean protein content of the single myocardial cell was also enhanced, and the volume of myocardial cell was increased significantly after a continuous stimulation of AngⅠ and AngⅡ for 7 days. No stimulation effect was observed either in the synthesis of DNA, RNA, and protein or in the volume of myocardial cells after addition of AngⅠ together with the angiotensin converting enzyme inhibitor(ACEI, captopril). These results indicated that: (1). AngⅠ acts as a regulator by its indirect stimulation effect on the synthesis of DNA, RNA and protein of myocardial cells, since it must be changed into AngⅡ by the ACE present in myocardial cells. The ACE can be inhibited by the ACEI: (2) The hypertrophy of cultured neonatal myocardial cells may induced by a continuous stimulation of AngⅠ and AngⅡ.

Adolescent ; Female ; Humans ; Lymphoma, T-Cell ; pathology ; Subcutaneous Tissue ; pathology

Bleeding Time ; Child, Preschool ; Female ; Hemorrhage ; diagnosis ; Humans ; von Willebrand Diseases ; diagnosis

Objective To evaluate the feasibility of leucovorin(LCV) rescue protocol defined by us,we compared the plasma concentrations,toxicity,LCV doses of different high doses methotrexate(HD-MTX).Methods Seventeen children with acute lymphoblastic leukemia and 1 children with non-Hodgkin′s lymphoma were randomly treated with total 43 courses of HD-MTX.MTX plasma concentrations were measured by fluorescence polarization immuno-assay.Different LCV rescue protocols were prospectively defined for 3 kinds of HD-MTX protocols.Adjusting LCV dose by plasma MTX concentrations.Results No irreversible MTX-related toxicity was observed in all patients.Significant differences of mean steady-state plasma concentrations(Cpss) and total rescue doses were found between 3 groups(P

Objective To investigate the serum levels of soluble human leukocyte antigen (sHLA)-G in patients with polymyositis (PM) or dermatomyositis (DM),and to analyze its association with clinical features and possible role in the pathogenesis of PM/DM.Methods Serum sHLA-G levels of 26 patients with PM,70 patients with DM and 35 matched healthy controls were measured by ELISA.The relationship between the sHLA-G levels and clinical features or seroimmunological data in the patients with PM/DM was analyzed.Results Serum levels of sHLA-G in PM/DM patients were significantly higher compared to healthy controls [(44±70) U/ml vs (4±5) U/ml,P＜0.01].There was statistically significant difference between DM patients and PM patients [(54±81) U/ml vs (27±41) U/ml,P=0.004].The incidence of dysphagia was significantly higher in sHLA-G elevated group than those in sHLA-G normal group (P=0.001).Additionally,Spearman rank correlation analysis showed that the serum sHLA-G levels were positively correlated with serum C3 (r=0.284,P=0.021),but negatively correlated with CD3+ T cells (r=-0.233,P=0.047) and CD4+ T cells (r=-0.287,P=0.015) in the peripheral blood in patients with PM/DM.Serum levels of sHLA-G in non-treated PM/DM patients were significantly higher compared to treated patients [(77±99) U/ml vs (34±52) U/ml,P=0.021].No relationship between serum sHLA-G levels and PM/DM disease activity,or different drug therapy was found.Conclusion Serum levels of sHLA-G are increased in PM/DM patients.The increased production of sHLA-G,paralleled with higher incidence of dysphagia and lower level of CD3+ T cells and CD4+ T cells,indicates that sHLA-G may play an important role in the pathogenesis of PM/DM.

Objective This study aims to test the hypothesis that low density granulocytes (LDGs) is involved in the pathogenesis of DM associated-Interstitial lung disease (ILD).Methods Forty eight DM patients (28 with ILD) and 19 age-and sex-matched healthy Chinese volunteers were recruited to this study.LDGs percentage in peripheral blood mononuclear cells (PBMCs) was tested by flow cytometry.Neutrophilrelated genes (LL-37,MPO and MMP-8) expressions in PBMCs were tested by quantitative RT-PCR.Myositis disease activity assessment visual analogue scales (MYOACT) was used to assess the disease activity.Percentages of LDGs were compared in patients with ILD and without by using unpaired t test with Welch's correction,the correlations between LDGs and clinical parameters were further analyzed by linear correlation analysis.The expressions of neutrophil-related mRNA and proteins in PBMCs were compared by using MannWhitney U test.Results LDGs percentage in PBMCs was 7.1-fold higher in DM patients than healthy controls [(9.1±11.5)％ vs (1.3±0.7)％,t=4.664,P＜0.01].LDGs percentage in PBMCs was 2.7-fold higher in DM patients with ILD than DM patients without ILD [(12.3±14.1)％ vs (4.5±2.6)％,t=2.835,P=0.008 3].The mRNA expression level of LL-37,MPO and MMP-8 and LL-37 protein levels in the DM group were significantly higher than those in the control group.LDGs percentage positively correlated with MYOACT lung disease activity scores (r=0.439,P=0.010).Conclusion Percentage of LDGs in PBMCs is significantly increased in DM patients with ILD and positively correlated with MYOACT lung disease activity scores,suggesting that abnormall increasing of LDGs is a potential contributor to the pathogenesis of DM-associated ILD.

Adolescent ; Aminolevulinic Acid ; pharmacology ; Female ; Humans ; Porphyria, Acute Intermittent ; physiopathology

Ataxia Telangiectasia ; complications ; genetics ; Child ; Female ; Humans ; Lymphoma ; etiology ; Male ; Sibling Relations

Objective To investigate the incidence of middle ear barotrauma due to hybaric oxygen therapy by using Health Education Atlas.Methods 100 patients were divided into two groups by random number table. The research group(49 patients)was educated by Health Education Atlas.The control group(51 patients)was educated by traditional education approach.During the first three days,we observed and recorded the eardrum injury and asked patients ear discomfort everyday.Results The incidence rate of middle ear barotrauma of the research group was 6.1%,which of the control group was 19.6%.The eardrum injury of the research group was milder than the control group(χ2 =4.02,P <0.05).Conclusion Education using Health Education Atlascan reduce the incidence of middle ear barotrauma due to hybaric oxygen therapy.

1 ?mol?L-1,and it was defined as "delayed" MTX elimination.Intra-patient variability in C48 was significant(P=0.000).Risk factors that correlated with increased C48 of MTX were boys,abnormal urine routine tests within 1 week before infusions,concurrent infections within 2 weeks before infusions,and co-administration of ceftriaxone(P