Objective To observe the elimination of oxygen free radicals in rat myocardium mitochondria by diazoxide(DE) during different duration of hypothermic preservation.Methods The Langendorff model of isolated rat heart was used.After stored in 4℃ Celsior solution or Celsior solution containing 30 ?mol/L of DE for different duration(0,3,6,9 or 12h),the activity of the superoxide dismutase(SOD) and the content of maleic dialdehyde(MDA) in heart mitochondrial were measured.The myocardial mitochondria ultrastructure was also evaluated.Results(1) After hypothermic preservation,the activity of SOD was decreased,the content of MDA was increased.The ultrastructure of myocardium mitochondria was also destrored in preserved rat hearts in a time-dependent manner.(2) Compared with the corresponding Celsior solution hypothermic preservation groups,DE significantly improved the above indexes(SOD,MDA and myocardial mitochondria ultrastructure).Conclusion Diazoxide can protect rat myocardial mitochondria from long-term hypothermic preservation injury by direct elimination of oxygen free radials and enhancement of the activity of SOD.

Objective To study the effects of rehabilitation training on angiogenesis and its ultrastructure and expression of CD32 in the peri-infarction region of rats with focal cerebral infarction. Methods Sixty-six Spra-gue-Dawley rats with experimental left middle cerebral artery occlusion (MCAO) were used as subjects in this study. All the rats were randomly divided into three groups: a rehabilitation training group (n=30), which was given bar rotating, balancing and rolling exercises everyday after 48 hours post MCAO; a control group (n = 30) and a sham-operated group (n=6), which were fed in cages with no special training exercises. Then brain tissues were fixed on the 3rd d, 7th d, 14th d after MCAO, for observing the morphological alterations of microvessels in peri-infarction re-gion using transmission electron microscope, immunohistochemistry and Western blotting were used to measure the ex-pression of CD31, which acted as the marker of the neogenetic microvessels. Results (1) It showed that the capil-lary endothelial cells were less edematous in the rehabilitation training group, and there were less pinocytosis bullae in basal membrane more integral nucleus of endothelial cells in rehabilitation training group when compared with those in the control group. (2) Expression of CD31 can be observed in peri-infarction region in both groups from the 3rd d on-wards, and peaked on the 7th d, and then gradually went down after the 14th d. Comparison between the 2 groups showed that the expression of CD31 in rehabilitation training group was higher than that in the control group at every time point, but statistical difference between the 2 groups in this regard could be revealed only on the 7th d (P< 0.05), Conclusion Rehabilitation training could promote ultrastruetural recovery of microvessels and induce an-giogenesis in peri-infaretion region, and it might be one of the mechanisms of neural functional recovery in rats after MCAO.

Objective To study the psychological health state of parents of children patients with hand foot mouth disease and provide scientific basement for clinical nursing care. Methods Zung self- rating anxi-ety scale (SAS) and self-designed investigation scale were used to survey 98 parents of children patients with hand foot mouth disease,and selective nursing intervention was adopted. Results The anxiety scores of the parents were significantly higher than those of the normal mode, and their psychological symptom was influ-eneed by various factors. After the nursing intervention, the anxiety degree was significant different from that of before intervention. Conclusions Psychological health levels of the parents of children with hand foot mouth disease were markedly lower than those of healthy individuals. Psychological nursing care should not only in-clude children but also their parents in order to alleviate their bad mental state.

Objective To study the effects of rehabilitative training on motor function and expression of GAP-43 and SYN in rats with local cerebral infarction. Methods A total of 76 male adult Sprague-Dawley rats were randomly divided into a rehabilitative training group(n=32),a control group(n=32),and a sham-operated group(n=1 2).All the rats were subjected to left middle cerebral artery occlusion(MCAO)with the suture occlu sion.Motor training programs including balancing,grasping,rotating and walking exercises were administered to the rats of the rehabilitative training group at 48 hours post-operation,while those of other two groups were reared in their original living status without any special training.The animals were given behavioral tests with Bederson test,balancing wood test,net screen test to assess the functional outcome,and immunohistochemistry staining was employed to evaluate the exDression of GAP-43 and SYN in peri-infarction cortex at the 3rd,7th,21 st,35th days after MACO,respectively. Results The scores of behavioral tests in the rehabilitative training group was better than those in the control group(P＜0.05)at the 7th,21 st,35th day after MCAO,and the immunostaining showed that expression of GAP-43 was higher in the rehabilitative training group than that in the control group(P＜0.05)and the sham operated group(P＜0.01)at the 7th and 21 st days post-operation,respectively,and that the expression of SYN was higher in the rehabilitative training group than that in the control(P＜0.05)and the sham operated groups(P＜0.05)at the 21 st and the 35th days post-operation,respectively. Conclusion Rehabilitative training can improve func tional recovery in rats with local cerebral infarction,and the function enhancement may be partially attributed to the up-regulation of expression of GAP-43 and SYN in peri-infarction cortex.

With the progess in studying gene structure and function of foot and mouth disease virus (FMDV), FMDV can express exogenous genes in different sites. Through transforming and modifying FMDV can achieve different application purposes such as improving virus titer, introducing tag, improving immune responses, and reducing pathogenicity. From the perspective of FMDV receiving inserted exogenous gene, this paper mainly describes the latest relevant developments of FMDV's expression to exogenous gene.
Foot-and-Mouth Disease Virus ; genetics ; Genetic Engineering ; Mutagenesis, Insertional

OBJECTIVE:To optimize the formulation of Dimemorfan phosphate tablets. METHODS:Using 60 min dissolution rate of dimemorfan phosphate as index,L9(34) orthogonal test was used to optimize the amount of starch,microcrystalline cellu-lose,croscarmellose sodium and concentration of HPMC E5 solution. The friability,hardness,60 min dissolution rate and main component were detected. The similarity of dissolution curves of Dimemorfan phosphate tablets was compared with that of imported tablets in 0.1 mol/L hydrochloric acid,pH 6.8 phosphate buffer,water and pH 4.0 acetate buffer. RESULTS:The optimized formu-lation of Dimemorfan phosphate tablet(1 000 tablets)was composed of dimemorfan phosphate 10 g,starch 60 g,microcrystalline cellulose 40 g,10% HPMC E5 solution and croscarmellose sodium 25 g. The friability,hardness,60 min dissolution rate and main component of 3 batches of Dimemorfan phosphate tablets prepared by optimized prescription were 0.42%-0.58%,9.8-10.5 kg,94.89%-96.21% and 99.21%-99.52%,respectively. In 4 dissolution mediums,similar factors f2 of dissolution curves between prepared tablets and imported tablets were above 50. CONCLUSIONS:Dimemorfan phosphate tablets were prepared successfully. The optimized formulation is rational. The dissolution behavior of prepared tablets is similar to that of imported tablets in vitro.

Objective To evaluate the safety and efficacy of Centurion Vision System for subhixated cataract surgery.Methods Clinical data of 15 eyes with lens subluxation treated with Centurion Vision System were retrospectively reviewed.Ocular variables including visual acuity,intraocular pressure,corneal endothelial cell counts (CEC),central foveal retinal thickness (CFRT),intraocular lens (IOL) position,as well as intraoperative and postoperative complications were observed.Results The best corrected visual acuity (BCVA) was 0.6 or better in 10 eyes (66.7％) 3 months after surgery,while the BCVA of the other 5 eyes was between 0.2 and 0.6 mainly due to pre-existing macular degeneration caused by high myopia or trauma.CEC and CFRT values demonstrated a statistically significant difference between the preoperative and all postoperative follow-ups (all P ＜ 0.05).Three months after surgery,no serious surgeryrelated complications,such as retinal detachment,IOL dislocation,suprachoroidal hemorrhage,macular edema,were observed.Conclusion Centurion Vision System can facilitate phacoemulsification in eyes with subluxated lenses,and this technique is safe and effective due to providing excellent outcomes and avoiding vitreoretinal complications.

Objective To establish a rapid diagnostic method for the detection of marine vibrios,and then construct a new technology platform for the clinical diagnosis of marine vibrio infection.Methods A pair of PCR primers and a sequencing primer based on the whA gene of V.vulnificus and the toxR genes of V.parahemolyticus and V.alginolyticus were designed respectively,and then the specific DNA fragments were amplified.Next,the single-stranded DNA templates were prepared for pyrosequencing.The obtained base sequence was validated by NCBI alignment.In addition,the 16S rRNA genotyping of V.vulnificus was also performed.Results The PCR primers and sequencing primer of V.vulnificus showed good specificity,and a 167 bp DNA fragment was amplified from 4 strains of V.vulnificus.The pyrosequencing results completely matched with the whA gene sequence of V.vulnificus.Meanwhile,the control strains were negative.A 105 bp DNA fragment and a 134 bp DNA fragment were amplified from 11 strains of V.parahemolyticus and V.alginolyticus,respectively,and the pyrosequencing results were consistent with the expected sequence.In addition,one of 4 strains of V.vulnificus was identified as 16S rRNA-A type,and the other 3 as 16S rRNA-B type.Conclusion The PCR-pyrosequencing method established in this study is a new method for the real-time detection of short nucleotide sequences.It has some advantages such as high throughput,high precision and simple operation,and may be applied to the fast and accurate identification of marine and terrestrial pathogenic bacteria.

Objective To discuss the protective effect of doxofylline on radical surgery for esophageal cancer.Methods Under elective general anesthesia, 60 cases, 35 males and 25 females, aged 45-70 years, BMI 20-30 kg/m2, ASA physical status Ⅰ or Ⅱ, FEV1%>50%, underwent radical surgery for esophageal cancer at middle and distal parts.Random number table was employed to divide these patients into two groups: doxofylline group (group D) and control group (group C) with 30 cases in each.After a routing intravenous induction in the two groups, mechanical ventilation was conducted after bronchial intubation with double channel catheter on the right side.The intravenous injection of doxofylline 4 mg/kg in group D was administrated 30 min after bronchial intubation with double channel catheter.Equal normal saline was instilled to the patients in group C.Blood samples were taken from radial artery to detect the levels of TNF-α, IL-6, IL-10, MDA and SOD at four time points: 10 min (T0) before the one-lung ventilation, 60 min after OLV (T1), after two-lung ventilation (T2) and the end of the operation (T3).Meanwhile, the blood and breath at these time points were tested.The occurrence of OLV, blood loss volumes, fluid input quantities, urine volumes, postoperative hyoxemia and pulmonary inflammation were observed.Results Compared with T0, the activity of SOD in serum and PaO2 in the two groups at T1-T3 decreased (P＜0.05).The concentrations of TNF-α, IL-6, IL-10 and MDA increased significantly (P＜0.05).Compared with group C, the activity of SOD activities and PaO2 in group D at T1-T3 increased while concentrations of TNF-α, IL-6, IL-10 and MDA decreased significantly (P＜0.05).The occurrence rates of postoperative hyoxemia and pulmonary inflammation in group D were obviously lower than those in group C (P＜0.05).Conclusion Doxofylline can suppress patients' inflammatory response and oxidative stress response after OLV and reduce the incidence rates of postoperative hyoxemia and pulmonary inflammation as well as alleviate lung injury triggered by radical surgery for esophageal cancer.

1/2 cycle, three cases