Objective To study the effects of 3,5-diiodotyrosine (DIT) and potassium iodide (KI) on myocardial ATPase activity in hyperthyroidism Wistar rats induced by thyroid tablets.Methods Seventy-two Wistar rats were divided into 8 groups according to body weight by the random number table method (9 rats in each group),respectively,which were control group,hyperthyroidism model group,low,medium and high doses groups (both DIT and KI contents were 25.0,166.7,500.1 μg/kg).Physiological saline was intragastrically administrated to the control group;the hyperthyroidism model group was given thyroid tablet suspension (200.0 mg/kg);DIT and KI groups were given thyroid tablet suspension with corresponding doses of iodine simultaneously.The medicine was given once a day for a mouth,all the rats were sacrificed and heart tissue was collected.The colorimetric method was used to examine the activity of ATPases (Na+-K+-ATPase,Mg2+-ATPase,Ca2+-ATPase).Results The activities of Na+-K+-ATPase,Mg2+-ATPase,Ca2+-ATPase were significantly different statistically between groups (F =2.99,3.03,6.18,all P ＜ 0.01).Compared with the control group [(4.01 ± 0.22),(4.28 ± 0.28),(4.46 ± 0.35) μmol/mg·h],the activities of ATPases (Na+-K+-ATPase,Mg2+-ATPase,Ca2+-ATPase included) were reduced significantly in hyperthyroidism model group [(3.60 ± 0.25),(3.42 ± 0.31),(3.85 ± 0.17)μ mol/mg·h,all P ＜ 0.01];the activities of Mg2+-ATPase in DIT medium dose group [(3.89 ± 0.35)μmol/mg ·h],Ca2+-ATPase in DIT medium and high doses groups [(4.12 ± 0.20),(4.09 ± 0.21)μ mol/mg·h] were reduced significantly (all P ＜ 0.05);the activities of Na+-K+-ATPases,Ca2+-ATPase were decreased significantly in three KI groups [(3.64 ± 0.32),(3.60 ± 0.32),(3.53 ± 0.33),(3.93 ± 0.22),(3.90 ± 0.23),(3.85 ± 0.26)μmol/mg·h],Mg2+-ATPase in KI high dose group [(3.65 ± 0.49)μmol/mg·h] was decreased significantly (P ＜ 0.05or ＜ 0.01).Compared with the hyperthyroidism model group,the activities of ATPase were increased in most of the DIT groups [Mg2+-ATPase in low,medium doses groups:(4.06 ± 0.51),(3.89 ± 0.35)μmol/mg·h;Ca2+-ATPase in low,medium,high doses groups (4.15 ± 0.26),(4.12 ± 0.20),(4.09 ± 0.21)μmol/mg·h,all P ＜ 0.05].Conclusion Supplementation of thyroid tablets in the process of hyperthyroidism formation in Wistar rats will reduce myocardial damage by DTT compared with the same dose of KI.

Adenolymphoma ; enzymology ; metabolism ; Humans ; Lymphoma, T-Cell ; enzymology ; metabolism ; Lymphoma, T-Cell, Peripheral ; enzymology ; metabolism ; Male ; Middle Aged ; Nitric Oxide Synthase Type I ; metabolism ; Up-Regulation

Ethylene carbodiimide (ECDI) is a chemical coupling agent,more and more studies have focused on the immune tolerance induced by administration of ethylene carbodiimide (ECDI)-fixed syngeneic splenocytes (Ag-SPs) coupled to peptides or to whole myelin proteins,in order to establish a novel and effective tolerance therapy for autoimmune diseases.The mechanisms and applications of immune tolerance induced by Ag-SPs in several kinds of common autoimmune diseases were summarized,and were compared with their counterparts in the traditional treatment.

Objective To investigate the expression and significance of myeloperoxidase(MPO) in acute lungs injury of severe acute pancreatitis associated ascetic fluid. Methods Forty-five adult wistar rats were randomly assigned into the group of negative control (group C,n=15),the group of severe acute pancreatitis (group S,n=15) and the group of peritoneal injection (group E,n=15). The group C was cut peritoneum and flipped pancreases softly. In group S,3.5% sodium taurocholate was injected retrograde in pancreatic and bile duct to establish the model of severe acute pancreatitis,and the pancreatic homogenate and ascites of the group S was injected into abdominal cavity of group E rats. After animal model established,rats were killed at 3h,6h and 12h point. The blood of inferior vena cava was sucked for determination of amylase.The inferior lobe of left lung was cut for myeloperoxidase detection.And pathology was regularly done about pancreas and lungs. Results Interstitial edema,hemorrhage and infiltration of neutrophilic granulocyte and macrophage were observed in group S and E. At different time point,the amylase levels of blood and myeloperoxidase of lungs in group S and E were significantly higher than those of group C,and the increasing degree of group E was smaller than group S. Conclusion Acute lung injury can be induced by the severe acute pancreatitis associated ascetic fluid. The expression of myeloperoxidase of lungs was increased to induce acute lungs injury.The reason may be concerned with activation of granulocyte by severe acute pancreatitis associated ascetic fluid.

In order to find an easy and rapid quantitative analytical method to detect rhamnolipid produced by Pseudomonas aeruginosa, three methods, H_ 2 SO_ 4 -anthrone analysis method, L-cysteine-H_ 2 SO_ 4 method and phenol-H_ 2 SO_ 4 method, were compared in the present paper, and the influence factors were also considered.The results showed that H_ 2 SO_ 4 -Anthrone analysis method was better than the others and its optimal reaction condition was obtained.The influence to the quantitative analysis of rhamnolipid from the residual glucose and the top clean liquid layer in the ferment solution could be ignored.But the influence from the bacterial body and the middle layer of the ferment solution reached a certain degree.Thus, the bacterial body should be removed before measuring.However, the influence from the middle layer of the ferment solution could be avoided by making a standard curve which was made by using a rhamnose mixed with the middle layer ferment solution.

Objective To study the changes in miRNAs expression in the exosomes of human umbilical vein endothelial cells(HUVECs) after 60 Co γ-rays expose using microRNA(miRNA) chips and bioinformatics techniques so as to provide new clues to the mechanism of radiation-induced vascular tissue injury and its bystander effects.Methods HUVECs exosomes were collected in the control and 4 Gy irradiated cells by ultra-high-speed centrifugation,and further confirmed using transmission electron microscopy (TEM) and Western blotting of exosomes biomarkers.miRNA microarray was used to analyze miRNA expression profiles of exosomes and cells.Also,real-time quantitative PCR(qRT-PCR) was used to verify differentially expressed miRNAs,and the miRDB and TargetScan were performed to predict the target genes of the differentially expressed miRNAs.Bioinformatics analysis was performed using DAVID,KEGG and other online tools.Results Compared with the control exosomes from non-irradiated HUVECs,miRNA microarray analysis revealed that 5 up-regulated,and 13 down-regulated miRNAs were identified in the exosomes from HUVECs at 0.5 h after 4 Gy-irradiation,and 16 up-regulated and 5 down-regulated miRNAs at 2 h after 4 Gy-irradiation.Moreover,38 and 85 miRNAs were differentially expressed respectively in the HUVECs at 0.5 h and 2 h after radiation.The difference was statistically significant(P<0.01).The results of bioinformatics showed that these miRNAs might exert the radiation-induced bystander effect (RIBE) by regulating MAPK signal pathways,RAS and PI3K-Akt signal pathways.Conclusion The ionizing radiation injury significantly alters the components and expression levels of exosomal miRNAs,which play important roles in regulating the signal pathways in response to radiation.

Objective To summarize the imaging features of intracranial solitary fibrous tumors (ISFT).Methods Ten patients with ISFT proven histopathologically were collected.Four cases had CT data and all cases had MR data.The imaging features and pathological results were retrospectively analyzed.Results All cases were misdiagnosed as meningioma at pre-operation.All lesions arose from intracranial meninges including 5 lesions above the tentorium,4 lesions beneath the tentorium and 1lesion growing around the tentorium.The margins of all the masses were well defined,and 8 lesions presented multilobular shape.CT demonstrated hyerattenuated masses in all 4 lesions,smooth erosion of the basicranial skull in 1lesion,and punctiform calcification of the capsule in 1lesion.T1WI showed most lesions with isointense or slight hyperintense signals including homogeneous in 4 lesions and heterogeneous in 6 lesions.T2WI demonstrated isointense or slight hyperintense in 2 lesions,mixed hypointense and hyperintense signals in 4,cystic portion in 2,and two distinct portion of hyperintense and hypointense signal,so called “yin-yang”pattern,in 2.Strong enhanced was found in all lesions,especially in 8 lesion with heterogeneous with the low T2 signal.“Dural tail” was found in 4 lesions.Conclusions ISFI has some specific CT and MR features including heterogeneous signal intensity on T2WI,strong enhancement of areas with low T2 signal intensity,slight or no “dural tail”,without skull thickening,and the typical “yin-yang” pattern.

ObjectiveTo evaluate the role of p38MAPK signaling pathway in the up-regulation of heme oxygenase-1 (HO-1) expression in the lung tissue in rats with acute lung injury (AL1) induced by endotoxic shock.MethodsForty-eight male SD rats,aged 8 weeks,weighing 180-200 g,were randomly divided into 4 groups ( n =12 each):control group ( group C ) ; endotoxic shock group ( group LS );endotoxic shock +SB203580 (a specific p38MAPK inhibitor) group (group LSS) and SB203580 group (group SB).Normal saline 0.5ml was injected via the femoral vein in groups C and SB,while LPS 10 mg/kg (in 0.5 ml normal saline) was injected via the femoral vein in groups LS and LSS.When MAP was decreased to 75％ of baseline value,10％ dimethyl sulfoxide (DMSO) 0.1 ml was infused via the femoral vein in groups C and LS,while SB203580 5 mol/kg (in 10％ DMSO 0.1 ml) was infused via the femoral vein at a rate of 0.01 ml/min in groups LSS and SB.Arterial blood samples were obtained at 6 h after LPS or normal saline was given for blood gas analysis and oxygenation index (PaO2/FiO2) was calculated.Then the rats were sacrificed and the lungs were removed for microscopic examination.The pathological changes of the lung were scored.The lung water content was calculated.The MDA content,SOD activity,and expression of HO-1 mRNA and protein,p38MAPK protein and phospharylated p38MAPK (p-p38MAPK) protein were determined.ResultsCompared with group C,the oxygenation index and SOD activity were significantly decreased,the pathological score,lung water content and MDA content were significantly increased,and the expression of HO-1 mRNA and protein and p-p38MAPK protein was significantly up-regulated ( P＜0.05),while no significant change was found in p38MAPK protein expression in groups LS and LSS,and no significant change was found in the indexes mentioned above in group SB (P＞0.05).Compared with group LS,the oxygenation index and SOD activity were significantly increased,the pathological score,lung water content and MDA content were significantly decreased,the expression of HO-1 mRNA and protein was significantly up-regulated,and p-p38MAPK protein expression was down-regulated ( P＜0.05),and no significant change was found in p38MAPK protein expression in group LSS ( P＞0.05).ConclusionThe inhibition of p38MAPK signaling pathway can lead to the up-regulation of HO-1 expression in lung tissues in rats with ALI induced by endotoxic shock.

Object: To investigate the effects of Huaiqihuang Granule, a compound Chinese herbal medicine, on expressions of nephrin and podocin of slit diaphragm of glomerular podocytes in rats with adriamycin-induced nephrosis and to explore the mechanism in reducing the proteinuria. Methods: Twenty SD rats were randomly divided into five groups: control group, model group, glucocorticoid group, Huaiqihuang Granule group and Huaiqihuang Granule plus glucocorticoid group. The 24-hour urine was collected 7, 14, 21 and 28 days after adriamycin injection respectively to measure 24-hour urinary protein, and all rats were sacrificed after 28-day treatment. Pathological changes in renal tissues were observed under a light microscope and an electron microscope. Expressions of nephrin and podocin mRNAs in renal cortex were determined by real-time polymerase chain reaction, and protein levels of nephrin and podocin were detected by Western blotting. Results: (1) In the model group and the treatment groups, the level of urinary protein increased significantly from the 14th day. (2) Under the light microscope, inflammatory cells and slight fibroplasia were found in renal interstitium of the model group, but there were less inflammatory cells in renal interstitium in the intervention groups than in the model group. Under the electron microscope, 29 days after adriamycin injection, extensive fusion of foot processes was observed. (3) The expressions of nephrin and podocin were higher in treatment groups than in the model group. (4) Proteinuria level was negatively correlated with the expressions of nephrin mRNA and nephrin and podocin proteins. Conclusion: The above results indicate that Huaiqihuang Granule can maintain the integrity of the slid diaphragram in podocyte, alleviate the lesion of glomerular filtration membrane, and decrease the proteinuria by up-regulating the expressions of nephrin and podocin. Huaiqihuang Granule plus glucocorticoid maybe has better effects than glucocorticoid alone.

Objective To evaluate the clinical value of regular and dual-time-point 18-fluorodeoxyglucose positron emission tomography-CT(FDG PET/CT)imaging for recurrence and metastasis in esophageal carcinoma(EC)after curative esophagectomy. Methods A retrospective study was done on 48 patients received curative esophagectomy, who underwent FDG PET/CT scans to detect doubtful recurrent or metastatic lesions. The diagnostic accuracy of FDG PET-CT was assessed with the help of pathological findings as well as clinical or follow-up data. Using Fisher's Exact Test from SPSS 11.5 to analyze the data.Results Of the 48 patients, after a median follow-up of 21.5 months, 61 sites of local and regional recurrence or metastasis were finally confirmed in 34 patients. The sensitivity, specificity and accuracy of regular FDG PET/CT imaging in detecting recurrence of all sites were 93.44%, 74.29% and 86.46%respectively. The specificity and accuracy of local recurrence and regional metastasis were 57.14% ,78.95% and 77.78% ,84.62%, respectively. The sensitivity, specificity and accuracy of dual-time-point FDG PET/ CT imaging in detecting local and regional recurrence(96.97% ,96.00% and 96.55%)were higher than those of regular FDG PET/CT(90.90%, 72.00% and 82.76%)and there were significant differences of specificity and accuracy(P = 0.049, P = 0.029). Conclusions Regular FDG PET/CT imaging is highly effective in detecting recurrence and metastasis in EC patients after curative esophagectomy despite the low specificity and accuracy. Dual-time-point FDG PET/CT imaging can elevate the specificity and accuracy.