Child ; Disease Management ; Humans ; Syncope ; diagnosis ; therapy

Objective To explore the difference of clinical features and laboratory indexs with different vasovagal responses in(head-up) tilt test(HUT) in children with vasovagal syncope(VVS).Methods Forty consecutive children diagnosed with VVS by HUT were analyzed.The vasovagal responses were divided into vasodepressor,cardioinhibitory and mixed patterns.The distribution and different clinical features and laboratory indexs of different response patterns in the VVS were studied.Results The most common vasovagal response was vasodepressor.There was no significant difference in their clinical features,including the motivation,presymptom,frequency and duration of syncope,baseline heart rate and blood pressure,and serum electrolytes among the children with different vasovagal respon-ses.Conclusion Vosodepressor response is the most common hemodynamic pattern in vasovagal syncope in children.

Objective To investigate the best MR technique for detecting small epidermoids in the cerebellopontine angle.Methods 7 patients with pathologically-proved small epidermoids only located in the cerebellopontine angle were collected. The imaging techniques included:conventional T1WI and T2WI, fluid attenuated inversion recovery(FLAIR),diffusion weighted imaging(DWI) and balanced fast field echo(B-FFE) .The findings were retrospectively analyzed.Results 6 of 7 cases of epidermoid tumours localized at the cerebellopontine angle and exhibited the similar signal intensity as the cerebrospinal fluid(CSF) on T1WI and T2WI.The remaining case was slightly isointense on either T1WI or T2WI.On FLAIR images in 6 cases,3 cases showed slightly hyperintensity, 1 case showed doubtful heterogeneous signal intensity and 2 cases did not reveal any abnormal signal intensity.3 cases were hyperintense differenting from CSF on DW images. All of seven cases showed heterogeneous signal characteristics and were quite different from CFS on B-FFE.Meanwhile B-FFE also produced clearly the tissue contrast of trigeminus embedded in epidermoids of the cerebellopontine angle.Conclusion B-FFE is much more useful for the early diagnosis of epidermoids in the cerebellopontine angle and it also can provide precise preoperative information about the trigeminus encasement.

Objective To explore the roles of reactive oxygen species(ROS) and TGF-?1 in aldosterone-induced PAI-1 production.Methods Quiescent rat mesangial cells (MCs) were treated by aldosterone.The level of ROS in MCs induced by aldosterone was measured by confecal laser scanning microscopy and the TGF-?1 activity in the supematant of culture was measured by mink lung epithelial cell (Mvllu) proliferation inhibition MTT assay.Then,before the addition of aldosterone,MCs were pretreated with NAC or TGF-?1 neutralizing antibody to decrease cellular ROS or inhibit activity of TGF-?1 induced by aldosterone respectively.PAI-1 mRNA was examined by semi-quantification RT-PCR and PAI-1 protein by Western blotting.Results The intracellular ROS induced by aldosterone increased by 5-fold compared to that of control group,and the activity of TGF-?1 stimulated by aldosterone increased markedly.TGF-?1 neutralizing antibody and NAC effectively decreased aldosterone-induced PAI-1 mRNA expression by 30% and 32%,and PAI-1 protein expression by 21% and 11%,respectively.However,neither TGF-?1 neutralizing antibody nor NAC alone could regulate aldosterone-induced PAI-1 mRNA and protein expression to normal level in 24 hours.Conclusions ROS and TGF-?1 play important roles in up-regulation of aldosterone- induced PAI-1 in MCs.ROS and TGF-?1 are not the exclusive pathway of PAI-1 expression induced by aldosterone in MCs.

Adolescent ; Child ; Child, Preschool ; China ; epidemiology ; Female ; Hepatitis B ; epidemiology ; immunology ; prevention & control ; Humans ; Infant ; Infant, Newborn ; Male

To further explore the result of bilingual teaching in pediatrics,we randomly chose 200 undergraduates of 4 class and released students'questionnaires about bilingual teaching with teaching content before and after class to assess students'understanding of bilingual teaching and analysed appraisal result.We found no significant difference of student score between students accepting bilingual teaching and not accepting the bilingual teaching,but there was difference for English tests and expression level.So we think that students can fully accept the bilingual teaching of pediatrics under the premise with selecting appropriate teaching methods and means.

Objective To study the mRNA expression of myelin basic protein (MBP) and myelin oligodendregha glyeoprotein (MOG) in hippocampus of rats following global brain ischemia.Method The four- vessel occlusion animal model in the Sprague-Dawley rats was used in this study.The mRNA expression levels of MBP and MOG in the hippocampus of rats were analyzed by reverse transcription polymerase chain reaction (RT- PCR) at day 2,4,7,14 and 28 days after global brain ischemia.There were eight rats at each time-point and sham operated group.Results The mRNA expression of both MBP and MOG in hippocampus of rats decreased at 2 days after global brain ischemia.The gene expression of myelin gene decreased significantly at 7 days and it reached to the lowest level at 28 days.Compared with sham operated group,the gene expression of MBP and MOG in hippocampus of rats decreased significantly at 7,14 and 28 days after global brain ischemia (P

Objective To investigate the factors associated with hyporesponsiveness to erythropoietin (EPO) in patients on maintenance peritoneal dialysis (PD) . Methods Data of 114 PD patients in our PD center were collected . Patients were divided into three groups according to weekly EPO dose: hyperresponsive, hyporesponsive and normal responsive . Various factors were compared among three groups by linear correlation and ordinal regression analysis to predict EPO resistance . Results As compared to hyperresponsive and normal responsive groups,significantly lower serum hemoglobin [(78 .11±13 .42) vs (106 .28±23 .83), (96 .31±12 .33) g/L],albumin [(33 .98±4 .78) vs (39 .72±4 .26), (35 .76±4 .88) g/L], and significantly higher serum CRP [(26 .08±21 .66) vs (5 .46±1 .75), (11 .82±5 .63) mg/L], ferritin [(371 .08±89 .38) vs (289 .39±76 .84),(323 .07±62 .46) μg/L] were found in hyporesponsive group(all P ＜ 0 .01) . Erythropoietin resistance index (ERI) was correlated with CRP and albumin . Regression analysis showed that serum albumin,CRP and ferritin were strong predictors of EPO hyporespnsiveness . Conclusions Serum albumin,CRP and ferritin are closely related to hyporesponsiveness . Malnutrition and inflammatory state contribute to EPO hyporesponsiveness .

Objective To investigate the inhibitory effects of rosiglitazone on the synthesis of reactive oxygen species (ROS) and the expression of monocyte chemoattractant protein 1 (MCP-1) induced by high glucose in rat mesangial cells. Methods The mesangial cells were divided into six groups: control group ( C, 5.6 mmol/L glucose), mannitol group (M, 24.2 mmol/L mannitol+group C), high glucose group( H, 30 mmol/L glucose), R1 group(R1, group H+10 μmol/ L rosiglitazone), R2 group (R2, group H+20 μmol/L rosiglitazone), N-acetylcysteine (NAC) group (N, group H+5 mmol/L NAC, NAC was added 1 h before the stimulation of high glucose). The level of ROS was measured by confocal laser scanning microscopy. The mRNA and the protein expression of MCP-1 were semi-quantitatively determined with reverse transcription-polymerase chain reaction and ELISA respectively. Results No significant differences of ROS and MCP-1 were found between control group and mannitol group. The intracellular ROS induced by high DOI:10.3760/cma.j.issn. 1001-7097.2009.01.011glucose increased by 4.1-fold compared to control group (P<0.01), which was prevented by rosiglitazone (20 μmol/L) and NAC respectively. The MCP-1 mRNA expression in group R2 and group N was significantly lower than that in group H (P<0.01). The MCP-1 protein level in group H [(940.9±20.3) ng/L] was higher than that in group C [(403.0±8.1) ng/L] (P<0.01), and the expression of MCP-1 protein in group R2 [(562.5±15.3) ng/L] and group N [(539.8±8.3) ng/L] was lower than that in group H (P<0.01). Conclusion Rosiglitazone may suppress high glucose-induced MCP-1 expression by reducing the level of ROS, which may be one of the mechanisms that rosiglitazone plays a direct role in the protection of kidney.

Objective To research the consistency of testing results with three different antimajor histocompatibility complex class Ⅰ-related chain A(MICA) specific antibody reagents in order to evaluate their clinical application's value.Method An collaborative study of 18 laboratories was undertaken at the 16th International HLA and Irnmunogenetics Workshop.Total of 16 sera(4 batchs)were tested for anti-MICA antibodies by Luminex method with three different reagents (Kit-A,-B and -C).Result Anti-MICA antibodies were found in 15 sera,except one sera(no.S04) ; No.S10 sera showed positive results in all the laboratories.The anti-MICA antibodies were divided into MICA-G1 group (MICA01,02,07,12,17 and 18) and MICA-G2 group (MICA 04,06,08/27,09 and 19).MICA-G1 group specific antibodies were detected in 5 sera with Kit-A and-B reagent; but there were false-positive results of anti-MICA08/27 and MICA19 antibodies in this 5 sera with Kit-C.MICA-G2group specific antibodies can be detected in other 5 sera with Kit-A and-B,But the MICA specific antibodies testing gave different results with Kit-A,-B and-C in all the last 5 sera samples.Testing of MICA08/27 showed highest consistency results (86.67％,13/15) with Kit-A,-B and-C; and testing of MICA19 showed lowest consistency results (40％,6/15) with this 3 reagents.There were 80％ consistency results of anti-MICA specific antibodies in 13 sera with Kit-B.Conclusion There are the same effect to judgment positive or negative result for anti-MICA antibodies with 3 different reagents,but the results of anti-MICA specific antibodies are not the same.Therefore,it's better to use two or more reagents to test anti-MICA specific antibodies,or choose reagent with wide detection range.