Animals ; Avoidance Learning ; physiology ; Cues ; Extinction, Psychological ; physiology ; Fear ; physiology ; Male ; Mental Recall ; physiology ; Rats ; Sleep Deprivation ; physiopathology ; Sleep, REM ; physiology

Objective Evaluation of left ventricular ( LV) function has great clinical significance in patients with early chro-nic kidney disease (CKD).The study was to evaluate whether two-dimensional speckle tracking imaging (2D-STI) technique can offer additional information of cardiac dysfunction in early CKD patients . Methods Conventional echocardiography and 2D-STI echocar-diography were performed in CKD group of 20 patients at stage Ⅱ-Ⅲ and control group of 20 healthy volunteers .LV structure and function were evaluated by conventional echocardiography .Multidirectional strain , strain rate and LV twist parameters were analyzed by 2D-STI technique. Results There was no statistical difference in conventional echocardiographic parameters such as left atrial diam -eter, end-diastolic LV diameter and ejection fraction between CKD group and control group .By applying 2D-STI technique, CKD group had significantly decreased value of global longitudinal strain (-19.8 ±2.4)%and strain rate(-1.1 ±0.3)S-1 in comparison to control group(-22.6 ±2.1)%、( -1.8 ±0.2)S-1, along with significant increase in the values of maximum LV rotation (11.6 ± 4.4)°and LV twist(19.6 ±3.8)°in comparison to control group(8.2 ±3.7)°、(13.5 ±3.6)°(P<0.05).There was no differences in both global circumferential and radial deformation parameters as well as maximum rotation value of LV assist device between two groups(P>0.05). Conclusion 2D-STI can detect subclinical LV dysfunction sensitively in early CKD patients .

Accidents, Occupational ; Humans ; Hydrogen Sulfide ; poisoning

Objective To assess the coronary flow reserve in the patients with systemic lupus erythematosus(SLE)by transthroracic echocardiography(TTE).Methods Coronary sinus blood flow of 24 SLE patients and 18 matched healthy controls were assessed by TTE.The coronary flow reserve was calculated as the ratio of hyperemic to baseline blood flow.Hyperemia was induced by intravenous administration of dipyridamole.Results Adequate recordings of blood flow in the coronary sinus under both conditions were obtained by TTE in all study subjects.Patients with SLE were found to have significantly decreased coronary flow reserve comparing with normal SUbiects(1.55±0.21 versus 2.51±0.33.P＜0.01).Conclusions Coronary flow reserve can be measured by TTE in SLE patients,Coronary flow reserve is impaired suggesting that SLE patients may have subclinical coronary artery disease.

AIM:To observe the transplantation of acellular porcine corneal stroma on the treatment of superficial keratitis by drug-resistant fungal.METHODS:We performed a retrospective analysis of 16 cases of fungal keratitis received the transplantation of acellular porcine corneal matrix from June 2015 to March 2016 with a follow-up of 6mo.We analyzed on items as postoperative visual acuity, corneal graft status, postoperative recurrence and postoperative complications.RESULTS:We observed a healing time of corneal epithelium in 7 to 10d postoperatively generally and the absence of corneal edema in 1mo, while the cornea gradually returned transparent in the 16 cases.Two cases required medication for an epithelial recovery and 3 cases received intervention for decreasing intraocular pressure to a certain level.During the follow-up we observed no cases of cornea degeneration, recurrence of infection or rejection.The vision acuity showed 1.27±0.22, 1.11±0.13, 0.79±0.22 in 1, 3 and 6mo after operation respectively.There was no statistical difference between vision in 1mo and the vision before surgery (P=0.06);while we found a statistical difference when comparing the vision of 3 and 6mo with vision before surgery (P=0.01,0.001).The vision in 6mo increased with a statistic difference to the vision at 1 and 3mo (P<0.001) while no statistic difference was observed between 1 and 3mo(P=0.11).CONCLUSION:Transplantation of acellular porcine corneal matrix is a safe and efficient treatment for fungal keratitis.

Abstract: Objective　The main aim of the study is to sequence the complete genome of two Getah virus strains (GS11-155 and HNDZ1712-1) isolated in Gansu Province and Hainan Province in 2011 and 2017 respectively and analyze the molecular and genetic evolution of the two strains compared with M1, which was first isolated in 1964 in Hainan Province, China. Methods　Genome of two newly isolated Getah viruses were sequenced by virus gene amplification technique, and the genomic database of Getah viruses was established. The molecular characteristics and genetic evolution of the viruses were analyzed by bioinformatics software. Results　The genome length of two new isolated Getah virus strains (GS11-155 and HNDZ1712-1) was 11 690 nt and 11 621 nt, respectively. Both strains had the structural characteristics of Alphavirus genome. Although the nucleotide sequence lengths of structural genes, non-structural genes and non-coding junction regions of the two strains were identical, the nucleotide sequence lengths of the 5' and 3' non-coding regions of the viral genomes were a few different. The 3'UTR repeats elements in the genomes of the two virus strains did not change. It was 97.7% and 98.1% different of nucleotide and amino acid homology between both strains of Getah virus, HNDZ1712-1 isolated in 2017 and M1 isolated in 1964 in Hainan Province. Interesting, Gansu 2011 cluster and Hainan 2017 cluster were emerged leading by both strains GS11-155 and HNDZ1712-1 respectively, those two clusters totally independent with M1 virus isolated from Hainan in 1964 in whole genome phylogenetic analysis first. Conclusions　Although the HNDZ1712-1 was also isolated from mosquito samples in Hainan Province, it was in a completely different evolutionary branch from the M1 isolated from Hainan Island in 1964, and was closely related to the strain isolated from Gansu Province (GS11-155) thousands of kilometers away. It is suggested that the two new strains of Getah virus are different from the Getah virus isolated in 1964.

Objective To evaluate whether global 2-dimensional strain imaging can offer additional benefit over conventional echocardiography to detect subclinical myocardial damage in patients with chronic kidney disease(CKD). Methods Conventional echocardiography and global 2-dimension strain imaging were performed in 39 patients with CKD [23 men and 16 women,mean age (45.6± 14.6) years] and 29 control subjects. Twenty patients had CKD stage 2 or 3(group 1 ) and nineteen patients had CKD stage 4 or 5(group 2). Left ventricular structure and function were evaluated by conventional echocardiography. Global longitudinal and circumferential strain and strain rate were analyzed. Results There were no differences in ejection fraction and fraction shortening between CKD patients and controls. Compared with controls, CKD groups had significantly decreased value of global longitudinal strain and strain rate. Global longitudinal strain decreased from - (23.8 ± 3.1 ) % in controls to - ( 18. 5 ± 2.4) % in group 1 and to - (15.2 ± 3.2) % in group 2 ( P ＜0. 001 ). Compared with controls, there was no difference in global circumferential strain and strain rate between group 1 and controls, but global circumferential strain and strain rate of group 2 was reduced [ - (17.1± 3. 0) % vs -(21.2±2.8)%, P＜0.05;-(1.0±0.2)% vs -(1.3±0.3)%, P＜0.05]. In correlation analyses, global longitudinal strain was positively related to eGFR( r =0. 376, P ＜0. 001 ) and inversely related to left ventricular mass index( r = - 0. 473, P ＜0.01). Conclusions Global 2-dimensional strain imaging may represent a useful tool for the assessment of subclinical myocardial dysfunction in patients with CKD.

This study aims to investigate the preparation process and in vitro release behavior of artesunate polylactic acid microspheres, in order to prepare an artesunate polylactic acid (PLA) administration method suitable for hepatic arterial embolization. With PLA as the material and polyvinyl alcohol (PVA) as the emulsifier, O/W emulsion/solvent evaporation method was adopted to prepare artesunate polylactic acid microspheres, and optimize the preparation process. With drug loading capacity, encapsulation efficiency and particle size as indexes, a single factor analysis was made on PLA concentration, PVA concentration, drug loading ratio and stirring velocity. Through an orthogonal experiment, the optimal processing conditions were determined as follows: PLA concentration was 9. 0% , PVA concentration was 0. 9% , drug loading ratio was 1:2 and stirring velocity was 1 000 r x min(-1). According to the verification of the optimal process, microsphere size, drug loading and entrapment rate of artesunate polylactic acid microspheres were (101.7 +/- 0.37) microm, (30.8 +/- 0.84)%, (53.6 +/- 0.62)%, respectively. The results showed that the optimal process was so reasonable and stable that it could lay foundation for further studies.
Artemisinins ; chemistry ; Calibration ; Drug Compounding ; methods ; Lactic Acid ; chemistry ; Microspheres ; Polyesters ; Polymers ; chemistry ; Polyvinyl Alcohol ; chemistry

Objective To study the biological activities of Synechococcus sp.PCC7942 with trans-mutated hCu,Zn-SOD-gene.Methods Synechococcus sp.PCC7942 with trans-mutated hCu,Zn-SOD were administered orally for 20d to mice,then the activities of glutathione peroxidase(GSH-Px),catalase(CAT),superoxide dismutase(SOD) and the content of malondialdehyde(MDA) were determined.Results The activities of GSHPx in serum and the activities of CAT in blood increased obviously;the activity of SOD in serum and liver increased markedly;the content of MDA in serum and liver decreased obviously.Conclusion Synechococcus sp.PCC7942 with trans-mutated hCu,Zn-SOD-gene had obvious antioxidant effect in vivo.

Objective To evaluate the effects of bone morphogenetic protein 2(BMP-2)gene modified tissue engineering bone combined with vascular bundle implantation in repairing segmental bone defect.Methods The isolated rabbit hone marrow stromal cells(MSCs),after being transfected by adenovirus carrying BMP-2 gene(Ad-BMP-2),were seeded on bovine cancellous bone scaffolds(BCB) to construct gone modified tissue engineering hone.The rabbit models with radial defects(2.0 cm long) were made and repaired with four methods including gene modified tissue engineering bone with vascular bundle implantation(Group A),gene modified tissue engineering bone(Group B),nongene modified tissue engineering bone with vascular bundle implantation(Group C),and only BCB scaffolds(Group D).After 4,8,and 12 weeks of operation,X-ray,histological examination,biomechanics analysis and capillary vessel ink infusion were conducted to observe angiopoiesis and osteogenesis.Results Group A gained better effect in the volume and activity of new bones than other groups,with vascular bundle sending out new branches into the transplanted bones and productive regeneration of capillary vessel.The defect in Group A was repaired satisfactorily.Group B showed better effect in speed and quality of bone formation than Group C under induction of BMP-2 gent.Mainly fibrous tissues but not new bones were observed in Group D.Conclusion BMP-2 gene therapy with vascular bundle implantation has very strong osteoinduction ability and quite good vascularization effect and is of great value to the treatment of bone nonunion and bone defects.