Animals ; China ; Hantavirus Infections ; veterinary ; Rodent Diseases ; virology

Objective To explore the etiology,clinical manifestations of infantal viral pneumonia in Luzhou area.Methods Five viral specific serum IgM antibodies were detected by enzyme-linked immunosorbent assay(ELISA) in acute period of viral pneumonia.Five kinds of virus were separated,as respiratory syncytial virue(RSV),influenza virus(IFV),adenovirus(ADV),cytonegalo virus(CMV),and parainfluenza virus(PIV).Serum specific IgM was positive,C-reactive protein(CRP) was less than 8 mg/L,and there was no(clini-)cal and laboratory proof of other pathogenic infection detected in 221 infants with pneumonia.Results 1.One hundred and four cases of viral infection were detected from 221 infants with pneumonia.The viral positive detected rate was 47.1%,and there were 75 cases of single viral infection(72.1%) and 29 cases of mixed viral infection(27.9%) among them.2.In the single viral infection,RSV was the first,IFV,ADV,PIV and CMV being the second,the third,the fourth,and the fifth respectively.3.The types of likely infection virus were different in different age-stage and seasons in infants.Conclusions The etiology of infantal pneumonia is complicated.The types of viral infection are various besides germ infection and the epidemic season peak;clinical manifestations are different.Earlier detection of(etiology) in infection will make clear the etiology and then take appropriate treatment measures to improve curative effect.

By using rice SSRP, RAPD and AFLP molecular markers, the genome of rice transgenic line "Minghui 63-Xa21" was analyzed. 32 SSRP primers, 42 RAPD primers and 8 AFLP primers could produce obvious PCR bands in the analysis of at least 12 individual plants selected randomly from "Minghui 63-Xa21" T3 generation. Totally 550 PCR bands, equivalent to 550 genomic sites, were detected. Different individual plants of the transgenic homozygous line displayed almost the same PCR pattern. Compared with the control "Minghui 63", no difference was found in their PCR patterns. This indicated that the introduction of Xa21 into the genome of "Minghui 63" did not change these 550 genome sites and their heredity. Very few variant PCR bands were observed in some individual plants from both "Minghui 63-Xa21" and "Minghui 63". However, the variant percentage was equivalent between the transgenic line and the non-transgenic control line.
Chromosome Mapping ; methods ; Genome, Plant ; Microsatellite Repeats ; genetics ; Oryza ; genetics ; Plant Proteins ; genetics ; Plants, Genetically Modified ; Protein-Serine-Threonine Kinases ; genetics ; Random Amplified Polymorphic DNA Technique ; methods

Objective To investigate interaction effect of hyperglycemia and hyperuricemia on the patients with abnormal alanine aminotransferase(ALT). Methods From March to November 2018, 5 223 cases with complete and suitable data were enrolled in the physical medical examination in Yichang, Hubei Province of China. The metabolic characteristics of the two groups (508 ALT anomaly cases and 513 normal cases) were compared and analysed, Logistic regression model was used to study the independent effects of risk factors, and the interaction between risk factors was analyzed by additive model and multiplicative model. Results Levels of uric acid, triglyceride, total cholesterol, low density lipoprotein-cholesterol, fasting blood glucose, systolic blood pressure, diastolic blood pressure, body mass index, aspartate aminotransferase were significantly higher than that of the control group(all P<0.05). After adjusting some confounding factors, multivariate Logistic regression analysis showed that risk of abnormal ALT was 5.62 times higher in subjects with hyperglycemia and hyperuricemia than in subjects without them(95% CI:1.65-19.73, P=0.004). Interaction analysis of risk factors for abnormal ALT showed that there was no multiplicative interaction between hyperglycemia and hyperuricemia, but with additive interaction, the synergy index was 3.02, the relative excess risk due to interaction was 3.09, the attributable proportion due to interaction was 54.98% and pure factor attribution interaction was 66.87%. Conclusions There are several abnormal metabolic indices in individuals with abnormal ALT. The positive interaction between hyperglycemia and hyperuricemia are among the important risk factors for abnormal ALT patients. They can significantly increase the risk of illness.

Objective To explore the protective effects of diazoxide on injury of human renal tubular cell(HK-2)induced by serum obtained from neonates with asphyxia.Methods HK-2 cells was used as the target cel1.The attacking concentration of serum obtained from neonates with asphyxia was 200 mL/L.The experiment was designed as 3 groups.HK-2 cells were divided into control group,asphyxia group,and diazoxide group.Control group:joined nutrient fluid including 100 mL/L embryo cow blood serum.Asphyxia group:joined nutrient fluid including the isometric 200 mL/L serum obtained from neonates with asphyxia.Diazoxide group:the diazoxide was joined nutrient including the isometric 200 mL/L serum obtained from neonates with asphyxia fluid.The diazoxide density finally was 100 ?mol/L.Then the change of morphology was observed and photographed under inverted microscope,and the cell viability was measured by methyl thiazolyl tetrazolium method,and the leakage rate oflactate dehydrogenase(LDH)was determined by biochemical methods.Results Under inverted microscopy,HK-2 cells in control group pastes the wall to be good,assumes the paving stone type,into flat polygon,fission many,the cell arrangement was close,connection large expanse,quantity were many.Compared with control group,the HK-2 cell to suffer injury obviously,the shape changed,become the anomalous circular or the ellipse by the model flat polygonal cell,the intercellular space crevice enlarged,the connection was loose,intercellular space obviously many cell fragmented.Living cell quantity reduced obviously,the cell vigor dropped,and the leakage rate of LDH increased significantly in asphyxia group(P

Objective To observe the changes of preoperative and postoperative retinal circulation time in partretinal laser photocoagulation (PRP) in patients with diabetic retinopathy (DR).Methods Together 16 patients (16 eyes) were collected as the subjects in this study,who was diagnosed as severe non-proliferative and proliferative DR by fundus fluorescein angiography (FFA) examination and had PRP indications for undergoing pan-retinal laser photocoagulation.Then retinal arterial and venous cir culation time in all patients was recorded using FFA before and 1 to 3 months after treatment.Meanwhile,it was necessary to observe the following variables,including the developing duration and complete filling time of the four branches of the retinal artery,as well as the duration of the laminar flow and complete filling time of the four branches of the venous artery,followed by calculating mean transition time of retinal artery,retinal capillary,retinal vein,retinal arteriovenous flow for comparison and analysis of changes in transit time of retina in different time-periods before and after treatment.Results The mean transition time of the retinal capillary in patient was (1.58 ± 0.99) s before treatment and (2.19 + 1.23)s after treatment,and the difference was statistically significant(P =0.011),but there was no significant difference in the mean transition time of the retinal artery,retinal vein and arteriovenous flow (all P ＞ 0.05).Conclusion The transit time of the retinal capillary at 1 to 3 months after PRP is significantly longer than that before treatment.

Objective To observe the expressions of Caveolin-1 (CAV-1) and transforming growth factor bata 1 (TGF-β1) in human adenocarcinoma of lung A549 cells exposed to hyperoxia,and to explore the changes in CAV-1 and TGF-β1 expressions and the role in hyperoxic lung injury.Methods After the A549 human lung cancer cell lines were resuscitated,the cells were packaged and cultured in 50 mL/L CO2 culture chamber,when approaching to the condition of confluence in CO2 culture chamber(37 ℃,50 mL/L CO2),the cells were randomly divided into control group and hyperoxia group.Eighteen bottles of A549 cells in each group.The hyperoxia group received attacking factor that was mixed with oxygen (950 mL/L)and CO2 (50 mL/L) at a velocity of 3 L/min for 10 min;then the flasks were enclosed and cultured in culture chamber,while those in control group were still exposed to 5 mL/L CO2.After cells were cultured for 12 h,24 h,48 h,the changes in morphology were observed under the inverted microscope,the expressions CAV-1 and TGF-β1 were detected by double immunofluorescence staining technique,followed by laser scanning under the focus microscope.Results In the control group,there was high expression of CAV-1 associated with low expression of TGF-β1 (44.25 ± 3.23,10.18 ± 2.74).Compared with control group,the content of CAV-1 reduced continuously (12 h:35.25 ± 1.88,24 h:20.75 ± 1.68,48 h:9.86 ± 2.80) under prolonged hyperoxia exposure,but TGF-β1 increased gradually(12 h:17.32 ± 1.50,24 h:26.51 ± 1.82,48 h:41.94 ±4.47),and the expression of CAV-1 had highly negative relation to TGF-β1 at the same time (r =-0.91,-0.62,-0.53,-0.88,all P ＜ O.05) in the control group and the hyperoxia group in 12 h,24 h,48 h.Conclusions The reduction of CAV-1 expression can attenuate the inhibitory effect of TGF-β1 and activate TGF-β1 signaling pathway,which may result in hyperoxic lung injury.

Objective This meta-analysis evaluated the accuracy of diagnosing coronary artery disease using 64-section spiral computed tomography, and compared the difference between Chinese studies and abroad studies.Methods Relevant English and Chinese articles published from 1998 to 2009 were searched in Cochrane library, Medline, Embase database,OVID database and CNKI. Heterogeneity was tested, pooled weighted sensitivity and specificity and the corresponding 95%CI were calculated. Summary receiver operating characteristic (SROC) curve was drawn and the area under the curve was calculated, differences between studies from China and abroad were compared. Results A total of 433 articles were searched and 108 articles were included(46 English articles and 62 Chinese articles)after excluding articles of research purposes or design does not match.Because of no gold standard, no blind, can not be calculated literature data, 7 and 20 (P>0.05), 44 and 6 (P<0.05), 3 and 1 (P<0.05) Chinese studies and English articles respectively were excluded.Twenty-seven articles fulfilled all inclusion criteria (8 Chinese and 19 foreign studies) In 8 Chinese studies the pooled weighted sensitivity and specificity and area under SROC curve was 0.892 (95%CI: 0.868-0.913), 0.972 ( 95%CI:0.966-0.977) and 0.983 (95%CI:0.966-1.000) at segment-based analysis. In 19 foreign studies, the pooled weighted sensitivity and specificity and area under SROC curve was 0.971(95%CI:0.957-0.982),0.878(95%CI:0.852-0.902)and 0.973(95%CI:0.958-0.989)at patient-based analysis, 0.917(95%CI:0.895-0.936), 0.919(95%CI:0.909-0.928) and 0.974(95%CI:0.964-0.984)at vessel-based analysis, 0.882(95%CI:0.868-0.895),0.959(95%CI:0.956-0.962)and 0.985(95%CI:0.978-0.992)at segment-based analysis. Pooled weighted pecificity of 64-section spiral CT angiography at segment-based analysis has significant different between home and abroad (P<0.05).Conclusions Meta-analysis showed that noninvasive 64-section spiral computed tomography could correctly diagnose coronary artery disease with high sensitivity and specificity. Quality of related studies performed in abroad is significantly higher than those performed in China.

The dominant gene Xa21 with broad-spectrum and high resistance to Xanthomonas oryzae pv. oryzae (Xoo) was transferred into C418, an important restorer line of japonica hybrid rice in China using double right-border (DRB) T-DNA binary vector through Agrobacterium-mediated transformation. 17 transgenic lines were Xa21-positive with high resistance to the race P6 of Xoo through PCR analysis and resistance identification, among the total 27 independent primary transformants (T0) obtained. The subsequent analysis of the T1 progenies of these 17 T0 lines through PCR-assisted selection and resistance investigation showed that four Xa21 transgenic T0 lines could produce selectable marker-free (SMF) progenies. The frequency of primary transformants producing SMF progenies was 15%. In addition, PCR analysis also revealed these SMF progenies did not contain vector backbone sequence, and they were named as SMF and vector backbone sequence-free (SMF-VBSF) Xa21 transgenic plants. The further molecular and phenotypic analysis of the T2 and T3 progenies testified the homozygous SMF-VBSF Xa21 transgenic plants were obtained with high resistance to Xoo.
DNA, Bacterial ; genetics ; Genetic Vectors ; Oryza ; genetics ; Plant Proteins ; genetics ; Plants, Genetically Modified ; genetics ; Protein-Serine-Threonine Kinases ; genetics ; Rhizobium ; genetics ; Transformation, Genetic ; Xanthomonas

OBJECTIVETo explore the effect of resveratrol on the levels of sirtuin 1 (SIRT1) and reactive oxygen species (ROS) in peripheral blood mononuclear cells (PBMCs) of premature infants exposed to hyperoxia.

METHODSPeripheral blood and isolated PBMCs from premature infants (gestational age<32 weeks) without oxygen supplement were collected and were randomly assigned into four groups: control, air+resveratrol, hyperoxia, and hyperoxia+resveratrol. The PBMCs were cultured in vitro for 48 hours, then the ROS content in PBMCs was measured by laser scanning confocal microscopy. Malondialdehyde (MDA) content in the medium was measured by the whole spectrum spectrophotometer. SIRT1 positioning was assessed by immunofluorescence. SIRT1 expression levels in PBMCs were measured by Western bolt.

RESULTSCompared with the control group, the level of SIRT1 in the air+resveratrol group increased significantly (P<0.05). The levels of ROS and MDA and the SIRT1 transposition rate in the hyperoxia group increased significantly, while the expression level of SIRT1 decreased significantly compared with the control group (P<0.05). The levels of ROS and MDA and the SIRT1 transposition rate decreased significantly (P<0.05), and the expression level of SIRT1 increased significantly in the hyperoxia+resveratrol group (P<0.05).

CONCLUSIONSResveratrol can increase SIRT1 expression in PBMCs and inhibit SIRT1 shuttle from nucleus to cytoplasm in order to increase the ability of antioxidative stress in premature infants exposed to hyperoxia, thereby reducing the oxidative stress injury in premature infants.

Female ; Humans ; Hyperoxia ; metabolism ; Infant, Newborn ; Infant, Premature ; Leukocytes, Mononuclear ; metabolism ; Lipid Peroxidation ; Male ; Oxidative Stress ; Sirtuin 1 ; blood ; Stilbenes ; pharmacology