Aerenchyrna formation has been described in depth in a number of species at a histological level. But large gaps remain in our understanding of its regulation as a developmental process. It is attempted to analyse essential mineral elements like K, Mg, Cu, Zn, Ca and P in the cell wall of aerenchyma cells in petioles ofS. trifolia at five different developmental stages by CSEM-EDX technique. At early stage, K and Cl concentrations in cell wall were high up to 36% and 4.3% of dry weight, respectively. It supported the hypotheses that aerenchyma spaces are filled with liquid at early developmental stages of aerenchyma in S. trifolia petiole. Mg concentration was high at stage 2, up to 0.86% of dry weight. Zinc and Cu were detected only at rapid expansion stages, during which the concentrations were up to 1.5% and 2.5%, respectively. Calcium was detected in the cell wall only at mature stages, the concentration was high up to 1.3% of dry weight at stages 4 and 5. These results confirmed that the element concentration of aerenehyma cell wall undergoes dynamic changes during different developmental stages, and a low Ca with high Zn and Cu concentration are needed for cell expansion. Copper and Zn deposition in the cell wall showed a significant positive linear correlation, suggesting that these two elements share same or similar uptake and transport mechanism in plants.

Objective To study the multi-slice spiral CT (MSCT) manifestations of septic pulmonary embolism(SPE) in order to get a better understanding of the disease,Methods The MSCT manifestations of 12 patients with septic pulmonary embolism were retrospectively analyzed and compared with chest radiograph.Results Of the 12 patients,Chest radiograph and CT scanning showed multiple peripheral pulmonary nodules in 8 and 12 cases,a feeding vessel sigu(0,9 cases),cavitations(6,10 cases) and wedge-shaped opacities(4,7 cases),focal infiltrates(2,4 cases),air cyst(2,5 cases),pleural lesions (3,6 cases),hilar or mediastinal lymphadenopathy(0,3 cases).Peripheral or subpleural zones were most commonly affected (8,12 cases).CT was more useful in revealing nodules and a feeding vessel sign.Multiplanar reconstructions (MPR),maximum intensity projection (MIP) showed that most of these vessels passed around nodules and wedge-shaped lesions.MPR showed regular nodular margin.Conclusion SPE presents with variable and often nonspecific clinical and radiographic features.MPR and MIP showed the features of nodules and feeding vessels better.The diagnosis is usually suggested by the presence of a predisposing factor,febrile illness,and CT findings of multiple,periphery pulmonary nodules,with orwithout cavitation and a feeding vessel sign.

10.3969/j.issn.1008-9691.2013.03.017

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Objective To explore the relationship between visuospatial abilities of the students ma-jor in air traffic management and their performances,and then provide theories of their vocational classified. Methods 104 healthy male college students were tested by the cognitive laterality battery (CLB),which included visuospatial tests and verbal-sequential tests.At the same time,their performances assessed by air traffic management stimulators.Results Subjects with higher scores achieved by operating on air traffic management stimulators have higher visuospatial abilities,which was confirmed by the visual spatial scores (A) ((0.183±0.094) vs (0.060±0.338), t=41.57, P=0.000) and cognitive laterality quotient (CLQ) ((0.087±0.108) vs (-0.096±0.101), t=43.14, P=0.000)).However,compared with others in lower scores group,their scores on the phonological tests (P) reduced ((0.096±0.081) vs (0.157±0.092), t=6.81, P=0.012) ) .Moreover,there were the significant positive correlation between their performance on air traffic management stimulators and A ( r=0.749, P<0.01) ,CLQ ( r=0.663, P<0.01) ,cognitive performance quotient (CPQ) ( r=0.394, P<0.01).Conclusion For air traffic management occupation,the higher visual spatial abilities were the base of having the higher performance.Thus the visuospatial abilities may be as a good index of selecting and vocational classified for air traffic management students.

AIM: To explore the role of purinergic signaling mediated by ATP in the Alzheimer ’ s disease (AD)-related colon motility disorder and its related molecular mechanisms .METHODS:(1)Clinical trials:AD patients in our hospital were collected and studied .Radioimmunoassay was used for the determination of plasma motilin (MTL), cholecystokinin (CCK), vasoactive intestinal peptide (VIP) and nitric oxide (NO), and high-performance liquid chroma-tography ( HPLC) was applied to test the level of adenosine triphosphate ( ATP) .The patients were assessed by neuropsy-chology and scored accordingly .( 2 ) In animal experiments , AD mice received Morris water maze test , and the spatial learning and memory function were evaluated .The plasma levels of MTL , CCK, VIP and NO were examined by radioimmu-noassay , and the level of ATP was measured by HPLC .Choline acetyltransferase ( ChAT ) , VIP, nitric oxide synthase ( NOS) and ATP synthase were detected by immunohistochemistry .Western blot and immunohistochemistry were used to detect the expression of P2Y receptor.(3) In vitro, organ bath was applied to observe the effect of α,β-methylene ATP (α,β-MeATP), an agonist of P2Y receptor, on both spontaneous and electrically evoked contraction of colonic smooth muscle strip, and the technique of intracellular microelectrode was applied to observe the effect of α,β-MeATP on the membrane potential of colonic smooth muscle cells .RESULTS:Compared with control group , the levels of MTL and CCK were decreased (P<0.01), and the levels of NO and ATP were increased (P<0.05 or P<0.01), while the VIP level was not changed.Mini-Mental State Examination (MMSE) score was decreased (P<0.05), Alzheimer’s Disease Assess-ment Scale-Cognitive Subscale (ADAS-Cog) score, Neuropsychiatric Inventory (NPI) score and Alzheimer’s Disease Co-operative Study-Activities of Daily Living Scale ( ADCS-ADL ) were all increased as compared with control group ( P <0.01).The 4~6 d escape latency of APP/PS1 AD mice was significantly prolonged (P<0.05), and the space explora-tion ability distinctly reduced (P<0.05).In AD mice, the levels of MTL and CCK were decreased (P<0.01), and the levels of NO and ATP were increased (P<0.05 or P<0.01), while the VIP level was not changed .The protein expres-sion of colonic ATP synthase was significantly increased (P<0.05), but the expression of ChAT, VIP and NOS was not changed.The expression of P2Y receptor was increased (P<0.01).The results of in vitro experiment displayed that α,β-MeATP, from 20 μmol/L to 100 μmol/L, inhibited the spontaneous contraction of colonic smooth muscle strip in the nor-mal mice and AD mice ( P<0.05 or P<0.01 ) , and this inhibition was reversed by Na +channel inhibitor tetrodotoxin (TTX) (P<0.05 or P<0.01).In addition, the effect of α,β-MeATP at 100μmol/L on the AD mice was more obvious than that on the normal mice (P<0.05), and this inhibition was also antagonized by TTX (P<0.05 or P<0.01), pro-minent in AD group as compared with control group (P<0.05).In 10 Hz electrically evoked contraction of colonic smooth muscle strip,α,β-MeATP inhibited both the normal and AD mice (P<0.05 or P<0.01), while the inhibition was more obvious in the AD mice at the concentration of 40μmol/L or 100μmol/L (P<0.05 or P<0.01).CONCLUSION:AD patients and AD mice are accompanied by decreased MTL and CCK levels , and enhanced NO level , thus inducing colonic motor dysfunction along with AD .Meanwhile, ATP in plasma, purinergic neurons , and P2Y receptor expression are in-creased in the AD mice .Purinergic signaling mediated by ATP inhibits colonic smooth muscle strip contraction and further paralyzes the colonic movement function in AD .

Objective To investigate the relationship between the composition of vaginal microbiota and the course of cervical precancerous lesion.Methods A total of 64 vaginal swabs were collected from 22 healthy women, 18 CINⅠ patients and 24 CINⅡ/Ⅲ patients who visited Obstetrics and Gynecology of the Second Xiangya Hospital of Central South University during July 2014 and July 2015.The Bacterial genomic DNA was extracted and the V3 and V4 hypervariable regions of 16S rRNA were amplified and high-throughput sequenced.The abundance and composition of vaginal microbiota were analyzed by Uparse, Mothur and LefSe statistical software.Results There was no significant difference in Alpha diversity index between CINⅡ/Ⅲ group(Chao:63±32;ACE:72±38;Simpson:0.70±0.27;Shannon:0.70±0.63) and control group ( Chao:48±24;ACE:54±25;Simpson:0.71±0.27;Shannon:0.65±0.58)(W=192,P=0.11;W=189,P=0.10;W=281,P=0.72;W=241,P=0.62).The ACE(85±37) and Chao(66±25) values of CINⅠgroup were significantly different from those of the control group (ACE:54±25;Chao:48±24)(W=99,P=0.006;W=113,P=0.02).At the phylum level, 78.69%(309 020/392 722) of the vaginal microbiota in the control group was Firmicutes, 16%(62 846/392 722) was Actinobacteria.Firmicutes was reduced to 64.86%(208 422/321 318) and Actinobacteria increased to 27.71%(89 040/321 318) in CINⅠgroup.The composition of vaginal microbiotain in CINⅡ/Ⅲ group was similar to those of control group.At the genus level, the composition of vaginal microbiota were similar between CINⅡ/Ⅲ group and control group, with Lactobacillus as predominant genus[71.81%(307 658/418 424)], Gardnerella[12.91%(55 299/428 424)], others such as Prevotella, atopobium were less.In the CINⅠ group, the abundance of Lactobacillus was decreased to 56.26%(180 787/321 318), Gardnerella was increased to 19.62%(63 057/321 318), and Listeria was increased to 7.7%(24 746/321 318).The composition of vaginal microbiota in the most samples was classified as CSTⅢ and CSTⅠ, with Lactobacillus inersand and Lactobacillus crispatus were dominant respectively.There was no significant difference in the composition of vaginal microbiota between the three groups(χ2=2.72, P=0.949).LEfSe analysis showed that the abundance of bacteria in CIN group and control group were varied.At the genus level, there were significant differences in the abundance of Geobacter, Atopobium and Ureaplasma (P<0.05, P<0.05, P<0.01, respectively).At the species level, there was significant difference in the abundance of Ureaplasma urealyticum serotype 9 (P<0.01).Conclusion The diversity and the composition of vaginal microbiota were similar between CIN patients and healthy women, but the abundances of some bacteria were varied, with Ureaplasma increased in patients with CIN.

OBJECTIVE To analyze the new features in diagnosis and treatment of parathyroid tumor co-existent with thyroid disease. METHODS The clinical data of 98 patients with parathyroid tumors from Jan.2007 to Dec.2016, in Zhejiang Cancer Hospital were retrospective analyzed. RESULTS In all 98 cases, there were 22 cases mistaken as thyroid disease before surgery. The misdiagnosis rate was higher(36.2％), when combined with thyroid disease. When co-existent with thyroid disease, the qualitative diagnosis rate of the ultrasound and CT will be decreased, it was easy to misdiagnosis. Logistic regression analysis showed that parathyroid tumor location, hyperparathyroidism, cystic parathyroid tumor affected the accuracy of the qualitative diagnosis of ultrasound. The size of the parathyroid tumor affected the accuracy of the qualitative diagnosis of CT. Three of 9 patients underwent bilateral thyroid cancer and parathyroid tumor resection presented permanent hypoparathyroidism(33％). CONCLUSION When combined with thyroid disease, parathyroid tumor is easy to be misdiagnosed, the qualitative diagnosis rate of the ultrasound and CT will also decreased. When combined with thyroid cancer, these will be a higher risk of hypoparathyroidism after bilateral thyroid cancer and parathyroid tumor resection.

Radiogenomics aims at investigating the relationship between radiomics features and genomic features, which has certain practical value in the individualized molecular targeted therapy. Meanwhile, it is noninvasive, repeatable and inexpensive. In recent years, a large number of studies have shown that radiomics features have certain predictive values for the mutation status of driver genes of lung cancer. The application of radiogenomics is insufficient at present, but with its continuous improvement and development, it will play an increasingly important role in the precise therapy of lung cancer in the future.

Objective To evaluate the efficacy and safety of two forms of preparations of dexamethasone palmitate in the treatment of rheumatoid arthritis (RA).Methods A multicenter,double-blind,randomized,parallel-group clinical trial was carried out according to good clinical practice (GCP).A total of 237cases of RA patients with mild to moderate knee swelling were randomly divided into the treatment group (n=118 ) or the control group (n=119) and were treated with two kinds of dexamethasone palmitate 8 mg injection respectively.The primary efficacy endpoints were the circumference of the knee joint at the upper and the lower edge after the intra-articular injection.The secondary efficacy endpoints were joint tenderness index and patients general assessment.The adveme events were recorded.Analysis of covariance,t test or Wilcoxon test,x2 test or Fisher exact test were used for statistical analysis.Results The upper edges of the treatment group and the control group after treatment were (37.2±3.3) cm and (36.4±3.9) cm respectively,and the lower edges of the two groups were (34.4±2.9) cm and (33.9±3.4) cm respectively.They were all significantly smaller than the edges before treatment [(38.1± 3.3) cm and (37.3±4.0) cm of the upper edges,(35.1±3.0)cm and (34.6±3.6) cm of the lower edges respectively ) (P＜0.O1)].After treatment,the joint tenderness index were improved (P＜0.01).A total ratio of great improvement and improvement of patients general assessment of the two group patients were 67.5％ (79/117) and 74.8％ (86/115) respectively.No statistical significant difference was found in all primary and secondary efficacy endpoints between the two groups (P＞0.05).During the clinical trial,the incidence of adverse events related to the treatment of two groups were 4.2％ and 6.8％,without any significant difference (P＞0.05).Conclusion New preparation of dexamethasone palmitate has the same efficacy and safety as the imported producted in the treatment of RA.The circumference of the knee joints at the upper and the lower edge may be used to assess the effects of intra-articular injections.