Objective To understand the isolation and change of drug resistance of mucoid Pseudomonas aeruginosa in sputum from 2013 to 2015 so as to provide a scientific basis for reasonable clinical use of antibacterial drugs.Methods The isolation,culture and identification were carried out according to the fourth edition of National Clinical Laboratory Operation Rules.The drug susceptibility testing was performed with the use of Kindy-Bauer.The drug susceptibility testing results were judged according to the standards of CLSI 2014.The clinical data were analyzed by software WHONET 5.6.Results Among 1 653 strains of Pseudomonas aeruginosa isolated in the clinical sputum specimens from 2013 to 2015,including 255(15.4%)strains of mucoid Pseudomonas aeruginosa;during the three years,the drugs of highest drug resistance rate was piperacillin,which was 29.0%;the drug resistance rate less than 10.0% had amikacin and piperacillin/tazobactam;the drugs with larger increase range of resistance rate included imipenem,levofloxacin,ciprofloxacin and ciprofloxacin,their resistance rates were increased from 12.5%,9.7%,8.3% and 9.7% in 2013 to 20.5%,17.0%,19.3% and 15.9% in 2015.Conclusion The isolating rate of mucoid Pseudomonas aeruginosa in sputm is gradually increased year by year from 2013 to 2015.At the same time,the drug resistance rates show an increasing trend in recent three years.It is necessary to strengthen the surveillance of drug resistance of mucoid Pseudomonas aeruginosa.

Objective To investigate the effect of 36 h continuous sleep deprivation(SD) on circadian clock gene expression in the rat liver and kidney and the alteration of urine biomarker levels.Methods Twelve rats were randomly divided into control group and SD group.An SD device was used to deprive the rats of sleep.After 36 h continuous SD, the abdominal cavity was exposed to obtain livers and kidneys, and RT-PCR and Western blotting were used to detect expression of clock genes.Then,the pelvic cavity was exposed to obtain urine, and the changes in bio-marker total bile acids(TBA) were tested with ELISA.Results Compared with the control group, the mRNA level of liver clock and bmal1 was obviously reduced in the SD-treated rats (P<0.05).However, no obvious change was found in the samples from the kidney.Sharp down-regulation of CLOCK and BMAL1 protein expression was also observed in the rat liver after SD treatment.Urine TBA content in SD treated rats was raised obviously (P<0.001), compared with control.Conclusion Thirty-six hours of continuous SD could result in deregulation of circadian clock gene and cholesterol metabolism disorder in the rat liver.TBA might be used as a noninvasive biomarker of liver injury under SD stress conditions.

Objective To analyse the differential expression of miRNAs in the brain of offsprings of hypothyroid and normal rats,and to explore the molecular mechanism underlying the effect of hypothyroidism on brain development in the offspring.Methods Forty-eight female Wistar rats were assigned to (1) control group (n =24),and (2) hypothyroid group after complete thyroidectomy (n =24).Serum TSH and Total thyroxine (T4) were measured one month after the surgery.Brain samples of fetal or postnatal rats were obtained during four different developmental stages:embryonic days (E) 13,E17,postnatal days (P) 0 and P7.The hippocampus and cortex were separated on P7.MiRNAs were isolated from tissues and two samples were used at each time point studied to reduce the influence of individual differences.The brain samples were detected by Gene Chip miRNA arrays (Affymetrix).Results In the brain tissues of fetal or neonatal rats of maternal hypothyroid rats,two miRNAs (mir-206,-324-5p) on E13,three miRNAs (mir-34c,-204,-194) in cortex on P7,and five miRNAs (mir-146b,-532-5p,-384-5p,-215,-212) in hippocampus on P7 were up-regulated by over 2 folds.Five miRNAs (mir-200b,-200c,-217,-672,-139-5p) on E17,one miRNA (mir-376-3p) on P0,and four miRNA (mir-672,-204,-335,-376-3p) in hippocampus on P7 were decreased by 50％ or more.Conclusion The miRNA expression profiles in the rat brain of offspring with maternal hypothyroidism are characterized by miRNA arrays.The identification of a subset of brain expressed miRNAs in the brain may explain the brain development abnormalities resulting from maternal hypothyroidism.

ObjectiveTo analyze and summarize the feasibility and characteristics of the posterior spinal canal reduction and fixation in treating mid-upper thoracic spine facture.MethodsA retrospective study was made on 17 patients with mid-upper thoracic spine facture to record the complication, compare the functions of the patients with complete and incomplete spinal cord injuries before and after surgery and examine the iatrogenic injury in patients without spinal cord injuries.ResultsNo complication happened after surgery.Incomplete injury was found in six patients, whose ASIA scales were found to be increased for 1-3 levels during the follow-up.While the complete injury was found in eight patients,whose ASIA scale remained unchanged during the follow-up.The sensory scores of both the incomplete injury group and complete injury group were processed with variance analysis and the results showed a significant difference between pre-operation and post-operation (F = 476.47, P = 0.000).The mean value between complete injury group and incomplete group was with high statistical difference (F = 31.46, P =0.000).The variance analysis of the motor scores showed a significant difference between before and after operation (F=46.75, P =0.000) and the mean value between complete and incomplete injury groups was with statistical difference (F = 158.59, P = 0.000).There were three patients with normal spinal cord function, with no decrease of ASIA scale or no change of the sensory and motor scores.ConclusionsFor patients with mid-upper thoracic spine fracture, posterior spinal surgery is conducive to the recovery of spinal function, for it can safely and effectively avoid worsening the thoracic and other combined injuries and release spinal pressure including the pressure in front part of the spinal cannal.

Objective To observe the treatment effect of minimally invasive surgery on bone defects. Methods Bone defect model was established in bilateral shaft of radius in 30 rabbits. Forefoots of each rabbit were then randomized into open grafting group(group A) and minimally invasive grafting group(group B). Minimally invasive bone grafting was performed in group B with self-made instruments. DEXA and electron microscopy were investigated in radial bone defect after six rabbits were sacrificed randomly at different time after bone grafting. Results DEXA showed bone density increased gradually in both groups, the bone density in minimally invasive group was higher than that in open group with significant difference(P

Objective To analyze the serious complications of percutaneous balloon mitral valvuloplasty (PBMV). Methods Between October , 1986,and November, 2000, 1200 patients with rheumatic mitral stenosis age 9-66 older underwent PBMV by Inoue Way. 98% of the balloon catheters were self-made and single balloon catheters.Results Operative successful rate was 98.82% . Serious complications occurred in 51 patients or (4.4%), including 4 cases of death (0.33%), 5 acute serious mitral regurgitation (0.42%), 8 acute cardiac tamponade (0.66%), 28 severe arrhythmia (2.3%), 4 acute left ventricular failure and acute pulmonary edema (0.33%), and 8 systemic thromboembolis. The four cases of death included 1 with acute pulmonary edema, 1 with cardiac arrest, and 2 with acute left ventricular failure with low cardiac output. Conclusion The results demonstrate that PBMV is an efifective and reliable procedure in the treatment of rheumatic mitral stenosis, but a marked decreasement in complication rates is attributable to refinement of patient selection criterion, technical advance in procedure, and strictly management of patients.

OBJECTIVETo investigate the effects of chrysalis oil on learning, memory and oxidative stress in D-galactose-induced ageing model of mice.

METHODSMice were injected intraperitoneally with D-galactose daily and received chrysalis oil intragastrically simultaneously for 30 d. Then mice underwent space navigation test and spatial probe test, superoxide dismutase (SOD), glutathione peroxidase (GSH-PX) activity and malondialdehyde (MDA) contents in mouse brain were measured.

RESULTSCompared to model group, escape latency in mice treated with 6 ml/kg*d chrysalis oil was significantly shorter (P<0.05), crossing times in 12 ml/kg*d group and 6 ml/kg*d group treated with chrysalis oil were significantly increased (P<0.05). Chrysalis oil treatment (12ml/kg*d) significantly increased SOD and GSH-PX activity and reduced MDA contents in brain of D-galactose-induced aging mice.

CONCLUSIONChrysalis oil can improve the ability of learning and memory in D-galactose-induced aging mice, and inhibit peroxidation in brain tissue.

Aging ; Animals ; Bombyx ; chemistry ; Galactose ; toxicity ; Learning ; drug effects ; Male ; Memory ; drug effects ; Mice ; Mice, Inbred ICR ; Oxidative Stress ; drug effects

saline group(all P

Objective To investigate the dynamics of the level of S100 in cerebrum, brainstem, and serum following the diffuse brain injury in rats and provide the experimental evidences for estimating injury time. Methods ELISA was used to determine whether S100 protein is changed after diffuse brain injury in rats. Forty rats were sacrificed at 0.5 hour, 2 hours, 4 hours, 12 hours, 24 hours, 3 d and 7 d after diffuse brain injury and normal rats as control. Results The level of S100 in cerebrum, brainstem, and serum increased, followed by a decrease, and then further increased. The level of S100 could be detected to increase at 30 minutes and reached the peak at 4 hours after DBI. The level decreased gradually to the normal at 1d and till 3 d formed the second peak. The level returned to the normal at 7d following injury again. In the postmortem injury groups, there were no significant changes compared to the control group. Conclusion The present study showed that the time-dependent expression of S100 is obvious following diffuse brain injury in rats and suggested that S100 will be a suitable marker for diffuse brain injury age determination.