Objective To investigate the diagnostic values of transcranial Doppler ultrasonography (TCD) for vertebral artery hypoplasia (VAH) and focal vertebral artery stenosis (fVAS) with CT angiography (CTA) finding as a standard.Methods Consecutive patient who underwent TCD and CTA were included.According to the findings of CTA,they were divided into 3 groups:a normal group,a VAH group,and a fVAS group.The TCD parameters included the mean flow velocity (MFV),peak systolic velocity (PSV),pulsatility index (PI),resistance index (RI) and asymmetry index (AI),and they were compared among the groups,respectively.The receiver operator characteristic (ROC) curves were used to evaluate the sensitivity and specificity of TCD parameters for diagnosis of VAH and fVAS.Results A total of 405 patients were enrolled,including 278 (68.6％) in the normal group,75 (18.5％) in the VAH group,and 52 (12.8％) in the fVAS group.There were significant differences in MFV,PSV,PI,and RI on the affected sides among different groups (the affected side in the normal group was defined as the right side).The blood flow velocity in the VAH group was the slowest,and that in the fVAS group was the fastest.Other parameters had the same trend.There were significant differences in MFV and PSV on the unaffected side among different groups.The blood flow velocity in the VAH group was significantly faster,the fVAS group was slightly faster,and the fVAS group was less than the VAH group.There were significant differences in AI among different groups,and it could be used as an indicator for diagnosis of VAH (the area under the curve 0.78,95％ confidence interval 0.72-0.84;P＜0.001).With the AI ＞33.7％ as a cut-off value,the sensitivity and specificity of VAH diagnosis were 74.7％ and 68.7％.Conclusions Attention should be paid to identifying VAH and fVAS when using TCD for evaluation of vertebral artery.AI ＞33.7％ can be used as a reference index for diagnosis of VAH.

Objective To explore the status of social support and its relationship with depression in elderly university students.Methods 159 students aged 55 to 79 years of Nanning elderly university were selected using cluster sampling methods.They were surveyed by Social Support Rating Scale and Geriatric Depression Scale.Results ①The total score of social support(40.92±7.63) was higher than that of the national norm(34.56±3.73 ) (t=10.515,P＜0.01),and score of social support,subjective support,utilization of support were higher than those of the elderly in Beijing Xicheng district community that was mental health guidance demonstration area in national community (t=2.064,2.017,9.222; P＜0.05).②Social support score and each dimension score of having a spouse group were higher than those of no spouse group (t=5.78,4.956,4.918,3.175 ; P＜0.0 1).③The positive rate of depression in the sample group was 26.8％.Social support score,objective support score,subjective support score of depression in positive group(37.43±7.41,21.43±4.93,7.67±2.37) were lower than those of negative group(42.17 ±7.35,24.43±4.22,8.78±2.83,t=3.585,2.277,3.776 ; P＜0.05).④Social support,objective support,subjective support and depression were negatively correlated (r=-0.296,-0.194,-0.307; P＜0.01).Conclusion Elderly university student's overall level of social support are higher,and social support is negatively correlated with depressive symptoms.

Objective To express the recombinant mouse histidyl-tRNA synthetase (HARS) and maltose binding protein (MBP) gene in Escherichia coli and obtain the purified protein which possesses antigen specificity.Methods Total RNA was extracted from the myocytes of C57BL/6 mouse and reversely transcripted to cDNA.The gene of N-terminal origin of 591 base pairs was amplified,then cloned into pMALc-5e vector.The recombinant plasmid was transformed into Rosetta-gami B,then IPTG was used to induce the expression of HARS-MBP.Fusion protein was purified by affinity chromatograph.The molecular weight (MW) of HARS-MBP was roughly determined by SDS-PAGE.The antigen specificity was identified by Western blotting using anti-Jo-1 serum from patients,commercial anti-HARS and anti-MBP antibodies.Results The recombinant HARS-MBP protein gene was efficiently expressed in Escherichia coli,and the MW was consistent with predicted MW of 66 000.The fusion protein was specifically combined with its antibody.Conclusion The HARS-MBP fusion protein could be efficiently and steadily synthesized in Escherichia coli,which shows satisfactory antigen specificity and provides the key requirement for making a deep study of HARS in the pathogenesis of idiopathic inflammatory myopathy(IIM) and animal modeling of IIM.