Sweepovirus is an important monopartite begomovirus that infects plants of the genus Ipomoea worldwide. Development of artiifcial infection methods for sweepovirus using agroinoculation is a highly efficient means of studying infectivity in sweet potato. Unlike other begomoviruses, it has proven difficult to infect sweet potato plants with sweepoviruses using infectious clones. A novel sweepovirus, called Sweet potato leaf curl virus-Jiangsu (SPLCV-JS), was recently identiifed in China. In addition, the infectivity of the SPLCV-JS clone has been demonstrated in Nicotiana benthamiana. Here we describe the agroinfection of the sweet potato cultivar Xushu 22 with the SPLCV-JS infectious clone using vacuum inifltration. Yellowing symptoms were observed in newly emerged leaves. Molecular analysis confirmed successful inoculation by the detection of viral DNA. A synergistic effect of SPLCV-JS and the heterologous betasatellite DNA-βof Tomato yellow leaf curl China virus isolate Y10 (TYLCCNV-Y10) on enhanced symptom severity and viral DNA accumulation was conifrmed. The development of a routine agroinoculation system in sweet potato with SPLCV-JS using vacuum inifltration should facilitate the molecular study of sweepovirus in this host and permit the evaluation of virus resistance of sweet potato plants in breeding programs.

Objective To investigate the influence of irbesartan taken before bedtime on morning blood pressure surge and urine microalbuminuria in elderly patients with essential hypertension. Methods Ninety-two patients with uncontrolled hypertension were recruited in this study and their 24-hour ambulatory blood pressure monitoring profiles were collected for analysis. After irbesartan taken before bedtime, its influence on general blood pressure, morning blood pressure surge and urine microalbuminuria was observed. Results Before irbesartan treatment,the average 24-hour ambulatory blood pressure was(140.1 ± 12. 7)mm Hg, the morning blood pressure surge was (45.6 ± 10.8) mm Hg, urine microalbuminuria level was (58.6 ± 3.7) mg/L. After irbesartan treatment,the average 24-hour ambulatory blood pressure decreased to (129. 5 t 11.8) mm Hg (t = 3.18, P ＜ 0.05), the morning blood pressure surge decreased to(14. 2 ±4. 1)mm Hg(t =5.74,P ＜0.01) ,urine microalbuminuria level decreased to(31.7±3.1)mg/L(t =5.24,P＜0.01).Conclusions Irbesartan can effectively reduce the peak morning blood pressure,improve achievement ratio of blood pressure control, decrease urine microalbuminuria level in elderly patients essential hypertension.

Objective To investigate the cell types of renal allograft intimal arteritis in posttransplantation patients and its relationship with peritubular capillaries (PTCs)C4d deposition. Methods Twenty allograft kidney transplant recipients from Jun 2006 to Jun 2008 were enrolled in the retrospective study. Twenty-one biopsy specimens with acute vascular rejection were immunostained for macrophages, T cells and C4d. In each biopsy specimen, arterial intimal macmphages and T cells were counted, and mean number of macrophages per "artery and T cells per artery were determined. The recipients were divided into C4d + and C4d- group according to whether C4d deposition in the PTCs. Results In the intimal arteritis of biopsies diagnosed as acute vascular rejection, the infiltrating cells were predominantly macrophages including C4d+ and C4d- group. T cells were the minority. The mean macrophage number per artery cross-section was significantly higher than the mean T cell number per artery cross-section in the C4d + group (12.45±9.86 vs 3.91±3.03, P=0.007) and in the C4d- group (3.47±1.89 vs 1.45±1.37, P=0.006). Forther more, the mean number of macrophage per artery cross-section in the C4d+ group was significantly higher than that in the C4d- group (P=0.007). Conclusions In the intimal arteritis of biopsies diagnosed as acute vascular rejection, the infiltrating cells are predominantly macrophages which has relationship with peritubular capillary C4d deposition. The mean number of macmphage per artery cross-section in the C4d+ biopsies is significantly higher than that in the C4d- biopses.

Objective To investigate the cell types of renal allograft glomerulitis in posttransplantation patients and its relationship with peritubular capillary (PTC) C4d deposition.Methods Fifty-one allograft kidney transplant recipients diagnosed as acute rejection from June 2006 to June 2009 in our center were enrolled in this retrospective study. Fifty-one biopsy specimens of these patients accompanied with glomerulitis were examined by immunostain for macrophages, T cells, granzyme B, Foxp3 and C4d. Glomeular macrophages, T cells, cytotoxic T cells, regulatory T cells were counted. The recipients were divided into C4d+ and C4d- groups according to the C4d deposition in peritubular capillaries. Results The total number of glomerular infiltrating cells in C4d+ group was significantly higher than that in C4d- group (17.79±7.70 vs 8.17±3.80, P＜0.01). The infiltrating cell was predominantly macrophage in CAd+ group and significantly higher as compared to C4d- group (13.73 ±7.03 vs 2.57 ±1.22, P＜0.01).However, the infiltrating cell was predominantly T cell in C4d- group and significantly higher as compared to C4d+ group (5.60±2.81 vs 4.05±2.60, P=0.023). The infiltrating T cells in both groups were predominantly cytotoxic T cells. Conclusions The total number of infiltrating cells in glomerulitis is related to peritubular capillary C4d deposition. The infiltrating cell is predominantly macrophage in C4d+ group and predominantly T cell in C4d- group. Meanwhile the infiltrating T cell in both groups is predominantly cytotoxic T cell.

Objective To compare the infectivity of several transformed Chlamydia trachomatis (Ct) mouse pneumonitis (Mopn) strains to host cells, and to identify cell invasion-related virulence genes in Chlamydial plasmids. Methods Several Ct strains, including wild-type Ct Mopn strain(WT strain), plasmid-free Ct strain(CMUT3 strain), Ct Mopn strain transformed with the shuttle vector carrying pGFP and the complete C. muridarum (CM) plasmid (pGFP::CM strain)and Ct Mopn strains transformed with shuttle vectors carrying pGFP and mutant CM plasmids with in-frame deletions of Pgp3, 4, 5 or 7 (pGFP::CM△Pgp3, 4, 5, 7 strains), were cultured, amplified and collected. After the concentrations of Ct were determined, each of these strains was divided into four groups to be inoculated at a same amount(1.5 × 104 inclusion forming units(IFU)) followed by four different treatments respectively: centrifugalization +DEAE group treated with centrifugalization followed by ion-exchange chromatography on diethylaminoethyl(DEAE)-cellulose columns, centrifugalization group treated with centrifugalization only, DEAE group treated with chromatography on DEAE-cellulose columns only, control group receiving no treatment. After additional culture for 20 - 24 hours, indirect immunofluorescence assay was performed to count the number of chlamydial inclusions. At 20, 40 and 60 hours after infection, the growth rate and area of chlamydial plaques were assessed after three continuous passages. Lugol′s iodine staining was conducted to observe glycogen synthesis in bacterial inclusions. Results The inclusion number in the centrifugalization + DEAE group, centrifugalization group, DEAE group and control group was 10.20 ± 1.30, 6.80 ± 0.44, 3.00 ± 1.22 and 0.80 ± 0.45 respectively for the pGFP::CM△Pgp4 strain, 6.40 ± 0.89, 3.80 ± 0.83, 1.60 ± 0.89 and 0.60 ± 0.54 respectively for the CMUT3 strain. Under same experiment conditions, the pGFP::CM△Pgp4 strain and CMUT3 strain showed similar infectivity, and formed less inclusions compared with the other Ct strains (all P < 0.01). The number of inclusions formed by the same Ct strains were significantly different among the 4 groups(F = 845.310, P <0.01), and were highest in the centrifugalization + DEAE group for all the strains. The pGFP::CM△Pgp4 strain showed significantly lower growth rate and area of plaques with an abnormality in glycogen accumulation compared with the other strains at 20, 40 and 60 hours after infection. Conclusion The plasmid-encoding gene Pgp4 may be a cell invasion-associated virulence gene in chlamydial plasmids.

Objective To evaluate dual-source dual-energy CT(DSCT) for the differentiation of urinary stone composition in vitro. Methods Ninety-seven urinary stones were obtained by endoscopic lithotripsy and scanned using dual-source dual-energy CT. The stones were divided into six groups according to infrared spectroscopy stone analysis: uric acid ( UA ) stones ( n = 10 ), cystine stones ( n = 5 ), struvite stones( n = 6), calcium oxalate ( CaOx ) stones ( n = 22 ), mixed UA stones ( n=7 ) and mixed calcium stones(n=47). Hounsfield units (HU) of each stone were recorded for the 80 kV and the 140 kV datasets by hand-drawing method. HU difference, HU ratio and dual energy index ( DEI ) were calculated and compared among the stone groups with one-way ANOVA. Using dual energy software to determine the composition of all stones, results were compared to infrared spectroscopy analysis. Results There were statistical differences in HU difference [(-17±13), (229±34),(309 ±45), (512 ±97), (201±64)and (530±71) HU respectively], in HU ratio (0.96±0.03, 1.34 ±0.04, 1.41 ±0.03, 1.47 ±0.03,1.30±0.07, and 1.49 ±0.03 respectively), and DEI( -0.006 ±0.004, 0.064 ±0.007, 0.080 ±0. 007, 0. 108±0.011 ,0. 055 ±0.014 and 0. 112 ±0.008 respectively ) among different stone groups(F=124. 894,407.028, 322. 864 respectively, P ＜0. 01 ). There were statistical differences in HU difference,HU ratio and DE1 between UA stones and the other groups( P ＜ 0. 01 ). There were statistical differences in HU difference, HU ratio and DEI between CaOx or mixed calcium stones and the other four groups (P＜0. 01 ). There was statistical difference in HU ratio between cystine and struvite stones ( P ＜ 0. 01 ). There were statistical differences in HU difference, HU ratio and DEI between struvite and mixed UA stones (P＜0. 05 ). Dual energy software correctly characterized 10 UA stones, 4 cystine stones, 22 CaOx stones and 6 mixed UA stones. Two struvite stones were considered to contain cystine. One cystine stone, 1 mixed UA stone, 4 struvite stones and 47 mixed calcium stones were considered to contain oxalate. Conclusions DSCT has the ability to differentiate urinary stone composition in vitro. With dual energy software, the UA, cystine and mixed UA stones can be differentiated from other types of stones.

Objective To evaluate the effieaey of test bolus technique with multi-slice spiral CT (MSCT) for determining the optimal scan delay time in CT Hepatic artery (HA)-portal vein (PV) angiography and multi-phase scanning.Methods MSCT liver angiography and multi-phase scanning were performed in 187 patients divided randomly into two groups.In group A (n =59),the scan delay time was set according to the subjective experiences of operators; in group B (n=128),the scan delay time was determined by test bolus technique.Abdominal aorta and superior mesenteric,vein were selected as target blood vessels,and 50 HU was set as enhancement threshold value.20 ml contrast agent was injected intravenously and time-density curve of target blood vessels were obtained,then HA-PV scanning delay time were calculated respectively.The quality of CTA images obtained by using these 2 methods were compared and statistically analysed using Chi-square criterion.Resuits For hepatic artery phase,the images of group A are:excellent in 34(58%),good in 17(29%),and poor in 8 (13%),while those of group B are excellent in 128( 100%),good in 0(0%),and poor in 0(0%).For portal vein phase,the images of group Aare:excellent in 23(39%),good in 27(46%),and poor in 9(15%),while those of group B are excellent in 96 (75%),good in 28 (22%),and poor in 4 (3%) respectively.There was statistically significant difference between the ratios of image quality in group A and group B (X2=14.97,9.18,P < 0.05).Conclusion Accurate scan delay time was best determined by using test bolus technique,which can improve the image quality of liver angingraphy and multi-phase scanning.

Objective To investigate the effect of bronchoalveolar lavage (BAL) with video bronchoscopy on mature neonates who suffer from severe meconnium aspiration syndrome(SMAS). Methods From June 2012 to December 2013, there were 15 neonates who were diagnosed as SMAS in NICU. They were given mechanical ventilation,conventional treatment and BAL with video bronchoscopy. Results The respiration rate decreased and SpO2 increased after BAL with video bronchoscopy. The OI,a/ApO2 were significant defference before treatment and 2 h, 6 h, and 24 h after treament (P<0.05). Conclusion To perform BAL with video bronchoscope on neonate with SMAS can help the ventilation and im-prove the function of pulmonary, it is safe and effective, worth to be generalized.