Objective To study the effects of hypoxia and reoxygenation on expression of a disintegrin and metalloprotease10(ADAM10),?-amyloid precursor protein cleaving enzyme(BACE1) mRNA in SH-SY5Y cells.Methods SH-SY5Y cells were grouped into hypoxic and control groups.The hypoxic cells were incubated in hypoxic condition(95%N_2,5%CO_2) for 12 hours and 24 hours,and then cells were reoxygenated for 0 hours,12 hours and 24 hours.The expression of ADAM10,BACE1 mRNA were tested respectively at different time points after reoxygenation by RT-PCR.Control groups were incubated in normal conditions,seeded and treated at the same time with the hypoxic cells.Results The expression of ADAM10 mRNA was down-regulated by 19.8%,41.4% and 64.6%(P=0.005,0.038,0.001) at different time after reoxygenation with 12 hours hypoxia and down-regulated by 30.1%,75.9% and 86.5%(P=0.009,0.005,0.043)after reoxygenation with 24 hours hypoxia.The expression of BACE1 mRNA was up-regulated by 31.5% and 35.1%(P=0.028,0.005)only at 12 hours and 24 hours points after reoxygenation with 24 hours hypoxia.Conclusion Hypoxia and reoxygenation might alter the expression of ADAM10 and BACE1,which demonstrates that the vascular factors should make the amyloid precursor protein easy to be processed by ?-secrease pathway,thus to involve the pathology of Alzheimer's disease.

objective To investigate the recurrence of stroke,clinical prognosis and vascular changes in patients with ischemic stroke due to middle cerebral artery stenosis. Methods The ischemic stroke patients with symptomatic middle cerebral artery stenosis were enrolled continuously and followed up prospectively for six months. The recurrence of ipsilateral stroke,clinical prognosis and dynamic changes of vessels were analyzed. Results Eighty patients were included,and 20.0% of the patients(16 cases)presented with recurrence of ipsilateral ischemic stroke and 56 cases (70.0%)with a good outcome(modified Rankin scale[mRS]≤1)during the 6 months follow-up;38.6% patients (27 cases) presented with significant vascular changes with progression in 12 cases (17.1%)and regression in 15 cases (21.4%). Conclusion The patients with simple symptomatic middle cerebral artery stenosis have an high rate recurrence of ipsilateral stroke but have good prognosis;Lesioned artery of the majority of patients in the short period after stroke was stable,but vascular stenosis in some patients could appear progression or remission.

Rotational vertebral artery occlusion syndrome, also known as Bow Hunter Syndrome (BHS), is a rare clinical syndrome that causes mechanical occlusion or stenosis of the vertebral artery during head and neck rotation or extension. Ischemia symptoms of the vertebral-basilar artery system often occur during head rotation and could rapidly improve with neutral position. In a few cases, BHS may result in arterio-arterial embolic infarction due to secondary thrombosis from intimai injury caused by repeated compression of the vertebral artery. The author reported a case of a young female patient with repeated posterior circulatory infarction caused by BHS. The patient suffered from sudden unresponsiveness,memory decline,and right limb inflexibility. There were no vascular risk factors in her past history,and no correlation between clinical symptoms and neck rotation. Neck rotation test by carotid ultrasound showed the blood flow of left vertebral artery was decreased and reversed when the neck rotated to the right. Head and neck CT angiography (CTA) and DSA examination showed left vertebral artery local protrusion at the junction of V3 and V4,which was considered as dissection or pseudoaneurysm. Left vertebral artery segment after axial transverse foramen was not visible on CTA during right head rotation. High resolution MR showed a membranous structure protruding into the lumen at the V3-V4 junction of the left vertebral artery. It is suggested that the clinical symptoms of BHS may be unrelated to neck rotation, but could only present as posterior circulation area infarction combined with ipsilateral vertebral artery imaging characteristics of limited range of dissection or pseudoaneurysm. Missed diagnosis and misdiagnosis may occur if the clinicians lack the corresponding understandings and knowledge. Therefore, in young patients with posterior circulation cryptogenic stroke,morphological changes of posterior circulation vessels should be carefully analyzed. If necessary,carotid ultrasound neck rotation test or dynamic DAS should be conducted to clarify whether BHS is involved.

Objective To analyze the changes of benign and malignant thyroid nodules during followup and to increase the diagnostic accuracy.Methods The ultrasonographic changes of 161 thyroid nodules confirmed by pathology were retrospectively analyzed,including size,internal components,echogenicity,margin,microcalcification,anteroposterior to transverse dimension ratio(A/T) and the relationships with thyroid capsule,and the change of cervical lymph nodes.Results Ninety-three benign thyroid nodules and 68 malignant thyroid nodules were enrolled in this study,the changes in size,internal components,microcalcification,the relationships with glandular capsule,and cervical lymph nodes were significantly different (P ＜ 0.05),while the echogenicity,margin,and A/T were not significantly different,benign nodules changed more easily in size and internal components,while malignant nodules changed more easily in microcalcification.Both the nodules broken the thyroid capsule or cervical lymph nodes exhibited malignant signs suggest probable malignancy.Conclusions Analyzing the ultrasonographic changes during follow-up contributes to identify benign and malignant thyroid nodules.

Objective To explore the value of high frequency ultrasound in differential diagnosis in dorsal thyroid (including gland dorsal or posterior) nodules.Methods Ultrasonographic features of 101 patients with ultrasonography suspected or misdiagnosed nodules in the dorsal area of the thyroid gland,which were then confirmed by pathology or hyaluronography/gastroscopy,were retrospectively analyzed.Ultrasonographic homogeneity (other nodules with similar ultrasonographic features were found in the ipsilateral gland),parenchyma homology (nodule parenchyma was continuous with glandular parenchyma) and blood homology (blood flow signals in nodules were continuous with those in glandular parenchyma) were applied as indicators for determinng thyroid nodules.Double-line sign or vascular arch sign at the edge of nodules served as an indicator for determining parathyroid nodules.Results Of the 101 cases,there were 46 thyroid nodules,35 parathyroid nodules,7 enlarged lymph nodes;6 esophageal diverticulum,6 esophageal cancer,1 cleft cyst.The determination of thyroid nodules by at least one of ultrasonographic homogeneity,parenchyma homology and blood homology showed sensitivity of 73.5 ％,specificity of 96.5 ％ and accuracy of 85.8％.In the determination of parathyroid nodules by double-line sign or vascular arch sign at the edge of nodules,sensitivity,specificity and accuracy was 54.1％,85.5 ％ and 74.5 ％,respectively.Conclusions Nodules in the dorsal area of the thyroid gland have different sources,and the understanding of corresponding characteristic ultrasonographic appearances is helpful for improving the differential diagnosis of these nodules.

Objective To observe the effect of core stability training on motor function, balance and activities for children with cerebral palsy. Methods 100 children with cerebral palsy were divided into control group (n=50) and treatment group (n=50). The control group accepted routine physical therapy, occupational therapy, acupuncture, sensory integration training and conductive education; while the treatment group accepted core stability training in addition, 3 hours a day for 12 weeks. They were assessed with Gross Motor Function Measure (GMFM-88), Berg Balance Scale (BBS) and Comprehensive Functional Assessment for Disabled Children (CFA-DC) before and after treatment. Results The scores of GMFM-88, BBS and CFA-DC improved more in the treatment group than in the control group (P<0.05). Conclusion Core stability training can further promote the recovery of motor, balance and activities in children with cerebral palsy.

Objective Cardio-cerebral infarction(CCI)is a severe clinical syndrome in which acute myocardial infarction(AMI)and acute ischemic stroke(AIS)occurs simultaneously(synchronous CCI,SCCI)or successively(metachronous CCI,MCCI).The study aims to explore its clinical profile,management and outcomes.Methods This is a single-center retrospective study of inpatients with CCI who presented to Xuanwu hospital from January 2014 to December 2021.The study collected and analyzed demographic informa-tion,clinical profile,management and outcomes(all-cause death,MACE events,mRS scores,bleeding events).Results Totally 137 patients with CCI were enrolled in the study,including 28 SCCI and 109 MCCI.Hypertension,smoking and diabetes were prominent risk factors for CCI.The heart function decreased significantly,including 42.9％suffered Killip Ⅲ-Ⅳ and 40.0％suffered decreased left ventricular ejection fraction.Large artery atherosclerosis was the most predominant etiology of AIS.The average NIHSS score was 11.24± 10.50.The rate of emergency reperfusion therapy was low(29.2％).Compared to the group that did not received emergence reperfusion therapy,the patients received emergency reperfusion therapy had a lower in-hospital mortality(P=0.042).All-cause mortality oc-curred in up to 27.0％,including 11.7％cardiovascular death.Heart failure(43.8％)was the most frequent MACE events.34.3％pa-tients had good neurological function(mRS 0-2)at discharge.27 patients(19.7％)experiencing major bleeding events,including 19 patients(13.9％)had the hemorrhagic transformation of AIS.Conclusion The CCI therapy still faces challenges,such as low reperfu-sion rate,differentiated antithrombotic options,and poor clinical prognosis.Large clinical research is need for promote the optimization of CCI treatment.

Objective To establish the measurement of IgA1 O-glycan-specific antiglycan autoantibodies in patients with IgA nephropathy (IgAN),and evaluate their role in the development and progression of IgAN.Methods In the IgAN regular follow-up cohort of Peking University Institute of Nephrology from January 2006 to December 2015,170 patients drawn by stratified randomization were enrolled in this study.Enzyme-linked immunosorbent assay (ELISA) was used to determine the levels of plasma galactose-deficient IgA1 (Gd-IgA1) and antiglycan autoantibody (IgG and IgA1).The correlation between antiglycan autoantibodies and clinicopathological parameters was analyzed by linear correlation and multiple linear regression analysis.The receiver operating characteristic curve (ROC) was used to evaluate the value of plasma anti glycide antibodies in the diagnosis of IgAN.Results IgG and IgA1 antiglycan antoantibodies that specifically recognized Fab-hinge region (Fab-HR) antigens could be detected in both IgAN and healthy control group.Agglutinin inhibition test showed that the specific antigen epitope was N-acetylgalactosamine (GalNAc) residue exposed to galactose deficiency in IgA1 hinged region.There was no significant difference in the absolute levels of plasma IgG antiglycan autoantibodies between IgAN and healthy controls (P=0.963).After adjustment of the plasma level of IgG,the normalized antiglycan autoantibody (ln[IgG antiglycan antibody/IgG]) in patients with IgANwas significantly higher than that in healthy controls (0.58±0.31 vs 0.37±0.11,P ＜ 0.01).The normalized level of IgG antiglycan autoantibody in IgAN patients was positively correlated with 24 h urine protein level during renal biopsy (Spearman r=0.183,P ＜ 0.05),and was also significantly correlated with 24 h urinary protein level after adjusting for baseline clinical and pathological factors (β=0.713,95％CI 0.323-1.102,P ＜ 0.01).The area under ROC curve (AUC) of normalized IgG antiglycan autoantibody in the diagnosis of IgAN was 0.764 (95％ CI 0.682-0.845,P ＜ 0.05).Using the cut-off value of 0.396,the sensitivity and specificity of normalized IgG antiglycan autoantibody for IgAN were 0.729 and 0.700 respectively.There was no significant difference in the absolute or normalized levels of IgA1 antiglycan autoantibodies between IgAN patients and healthy controls.Conclusions Gd-IgA1-specific antiglycan autoantibodies can be detected both in IgAN patients and healthy controls.They are elevated in some patients with IgAN and possibly involved in the development of IgAN.

Objective To investigate the distribution and changing resistance proifle ofSalmonella isolates in hospitals across China during the period from January 2005 to December 2014.Methods Seventeen general hospitals and two children’s hospitals were involved in this program. Antimicrobial susceptibility testing was carried out by means of a unified protocol using Kirby-Bauer method or MIC determination. The results were analyzed according to CLSI 2014 breakpoints.Results The proportion ofSalmonella isolates increased with time from 0.2% in 2005 to 0.7% in 2014. A total of 3 478Salmonella strains were collected from 19 hospitals. The proportion ofSalmonella typhimurium andSalmonella enteritidis was 27.4% and 24.4%, respectively. During the 10-year period, theSalmonella strains showed highest resistance rate to ampicillin (33.3%-64.8%), but low resistance to cefoperazone-sulbactam (0-5.3%) and ciprofloxacin (2.4%-14.3%).S. typhimurium showed higher resistance rate thanS. typhi,S. paratyphi andS. enteritidis. About 76.8% and 50.5% ofS. typhimurium were resistant to ampicillin and trimethoprim-sulfamethoxazole. The average prevalence of multi-drug resistantSalmonellawas 3.9% in the ten-year period, the highest (7.5%) was in 2005, the lowest (1.5%) in 2013.Conclusions During the period from 2004 to 2015, majority of theSalmonella isolates in hospitals across China wasS. typhimurium andS. enteritidis. Ampicillin and trimethoprim-sulfamethoxazole are no longer appropriate for empirical treatment ofS. typhimurium infection due to high resistance rate.Salmonella isolates are relatively more susceptible to third-generation cephalosporins and quinolones. Ongoing monitoring is necessary to identify multi-drug resistant strains ofSalmonella.