Objective To investigate the mechanism of the radiosensitivity effect of Cox-2 gene in esophageal cancer.Methods Cox-2 specific siRNA was constructed and transfected to EC9706 cells to downregulate intracellular Cox-2 expression.The expressions of MMP-2,Bcl-2 mRNA,AKT and phosphorylated AKT proteins were assayed after radiation.Colony formation,cell proliferation,apoptosis and cell invasion in vitro were examined as well.One-way ANOVA method was used to analyze the data.Results Affter 2 and 4 Gy irradiation,a significant increase in the mRNA expression of Bcl-2 was observed in the Cox-2 up-regulation group (F =3.36,4.32,P ＜ 0.05).In the group of Cox-2 downregulation,the expression of MMP-2 mRNA was significantly reduced(F =3.86,8.09,P ＜ 0.05).Affter irradiation,a significant decreaseof Bcl-2 mRNA (F =3.73,5.64,P ＜ 0.05) as well as an increase of Bax(F =7.03,7.42,P ＜ 0.05) was detected,and the levels of total and phosphorylated AKT proteins had the highest level in the Cox-2 upregulation group and had the lowest level in the Cox-2 downregulation group.In the Cox-2 downregulation group,the apoptosis induction obviously increased with dose (F =317.40,P ＜ 0.05),and the proportion of cells in Go-G1 phase gradually increased but the proportion of cells in S and G2-M phases decreased,concomitant with the obvious suppression of cell proliferation,in addition,cell invasion was decreased.Conclusions Downregulation of intracellular Cox-2 mRNA expression,concomitant with subsequent downregulation of MMP-2 and Bcl-2 and upregulation of Bax,resulted in reduction of the invasion and metastatic capabilities of tumor cells,and induction of Go-G1 phase arrest and apoptosis.Downregulation of AKT and phosphorylated AKT (pAKT) protein expression might also interfere with the capability of the PI3K/Akt signal transduction pathway to resist radiotherapy.

Objective To investigate the feasibility of combing the application of transforming growth factor-β3 (TGF-β3) with concentration of 100 ng/μl and dental pulp stem cells (DPSCs) for recovering rabbit facial nerve transverse trauma.Methods Thirty-six healthy adult Zelanian rabbits of clean-grade were selected and randomly divided into group DPSCs+TGF-β3 (experimental group), group TGF-β3 (control group 1) and group PBS (control group 2) with 12 rabbits in each group.The operations for all three groups were applied at rabbit's left cheek.A model of traumatic transection was set on upper buccal branch, then 100 ng/μl TGF-β3 solution and 0.1 ml of 1 ×108/L DPSCs suspension were added into regeneration chamber for the experimental group, while the same amount of 100 ng/μl TGF-β3 solution was added for group TGF-β3 and the same amount of PBS for group PBS.The recovery of facial nerve regeneration with the prepared animal's specimen was evaluated in the 1st, 4th and 12th week after the operation on sacrificed rabbits.Results The effects on nerve regeneration recovery for the experimental group was superior to that of control groups 1 and 2 with all the 36 models included in the result analysis, and that of control group 1 was superior to that of control group 2, which was getting better with the extension of time.Conclusions The combined application of TGF-β3 and DPSCs can effectively promote the facial nerve regeneration, which is better than that of single application of TGF-β3.Meanwhile, the effect with TGFβ3 application is better than that with application of PBS.

ObjectiveTo investigate the effects of using transforming growth factor-β3 (TGF-β3) combined with dental pulp stem cells (DPSCs) on the regeneration of rabbit facial nerve.MethodsSixteen New Zealand adult rabbits were selected randomly.These rabbits were divided into three groups (TGF-β3 and DPSCs treated group,TGF-β3 control group and PBS control group.treatment group (silicone guidance channel with collagen protein sponge were filled with TGF-β3 and DPSCs),TGF-β3 control group (silicone guidance channel with collagen protein sponge were filled with TGF-β3) and PBS control group(silicone guidance channel with collagen protein sponge were filled with PBS).After 3 months,a series of examinations were performed,including gross morphology,histological staining,neuroelectrophysiological tset.ResultsIn the experimental group,the diameter of the regenerating nerve and near distal nerve stem were almost the same.There were no formation of neuroma.The adventitial angiogenesis was rich and with tough texture.3 months after operation,in the experimental group,the facial nerve membrane integrity,nerve fibers arranged in neat rows,form a more complete,myelin swelling.The total number of regeneration of nerve fibers in the experimental group were more than of control groups,statistical analysis was significant (P＜0.05).Diameter of regenerating nerve fibers in the experimental group were greater than that of control groups,statistical analysis was significant (P＜0.05).The ultra-thin section showed that the regenerated fibers in the treatment group were mainly myelinated never fiber.The layer structure of myelin sheath was clear,and there were rich organells axoplasma.The neuroelectrophysiological examinations revealed that the latency of nerve and muscle action conduction in the treatment group was shorter than that of the control groups,the treatment group:(1.96±0.32) ms,the TGF-β3 control group:(2.35±0.41) ms,the PBS control group:(3.42±0.55) ms.The wave amplitude of nerve and muscle action conduction in the treatment group was obviously higher than that of control groups,the treatment group:(11.06±3.25) mV,the TGF-β3 control group:(8.40± 1.68) mV,the PBS control group:(4.62±0.77) mV.ConclusionThe combination of TGF-β3 and DPSCs can improve the effects on the repair of facial nerve injury.

AIM: To investigate the influence of Buxinqi Capsule (BXQ) on myocardial ischemia reperfusion injury in rats. METHODS: In this study, the experimental model was established by reperfusion for 60 minutes in rats after ligaturing left anterior descending coronary artery (LAD) for 30 minutes. Serum creatine phosphokinase (CPK), lactate dehydrogenase (LDH), superoxide dismutase (SOD) and malondialdehyodebis (MDA), area of myocardial infarction and occurrence of arrhymia were investigated. RESULTS: BXQ significantly decreased level of CPK and LDH and MDA, and obviously improved the activity of SOD, decreased reperfusion arrhythmias and arrhythmias severity index (ASI), and decreased the area of myocardial infarction. CONCLUSION: BXQ has protective effect on the damage of myocardia ischemia reperfusion in rats

Objective To assess mucin gene expression in Barrett's esophagus.Methods Mucin core protein-MUC1,MUC2,MUC3,MUCSAC and MUC6 were detected by immunohistochemistry.The re- lationship between mucin expression and magnification-endoscopic characteristics,pathohistologic epithelial types of Barrett's esophagus was analyzed.Results Mild expression of MUC1 was predominantly found in the superficial epithelium of both gastric and specialised intestinal metaplasia.In a small number of specimens, mild expression of MUC1 was also noted in glands.Strong MUC2 expression was noted only in the goblet cells in Barrett's oesophagus.MUC3 was expressed in the superficial columnar cells of specialized intestinal metaplasia with or without globlet cells but not in gastric metaplasia of the oesophagus.In some specimens MUC3 was expressed in the vacuolus of the globlet cells and the lumen of gland.Strong staining of MUCSAC was noted in the columnar epithelium of both gastric metaplasia and specialized intestinal metaplasia in Barrett's oesophagus,as well as expressed in the cytoplasm and vacuolus of the globlet cells in some speci- mens.Expression of MUC6 protein was detected at the basement of the crypts in gastric metaplasia and spe- cialised Barrett's glands.Expression of MUC2 and MUC3 protein was found much higher in villous or irregu- lar pit pattern than that in dot or rod pit pattern(P

Prolyl-4-hydroxylase domain (PHDs) family is one of the most important regulatory factors in hypoxic stress. PHD2 plays a critical role in cells and tissues adaptation to the low oxygen environment. Its hydroxylation activity regulates the stability and transcriptional activity of the hypoxia-inducible factor 1 (HIF-1), which is the key factor in response to hypoxic stress. Subsequently, PHD2 acts as an important factor in oxygen homeostasis. Studies have shown that PHD2, through its regulation on HIF-1, plays an important role in the post-ischemic neovascularization. Furthermore, under hypoxic condition, PHD2 also regulates other pathways that positively regulate angiogenesis factors HIF-1 independently. Moreover, recently, several evidences have also shown that PHD2 also affects tumor growth and metastasis in a tumor microenvironment. Based on these facts, PHD2 have been considered as a potential therapeutic target both in treating ischemic diseases and tumors. Here, we review the molecular regulation mechanism of PHD2 and its physiological and pathological functions. We focus on the role of PHD2 in both therapeutic angiogenesis for ischemic disease and tumor angiogenesis, and the current progress in utilizing PHD2 as a therapeutic target.
Animals ; Humans ; Hydroxylation ; Hypoxia-Inducible Factor 1 ; metabolism ; Hypoxia-Inducible Factor-Proline Dioxygenases ; antagonists & inhibitors ; physiology ; Neoplasms ; blood supply ; metabolism ; pathology ; therapy ; Neovascularization, Pathologic ; metabolism ; pathology ; Tumor Microenvironment ; Vascular Diseases ; pathology ; therapy

Objective To explore the effect of long-term depleted uranium (DU)ingestion on testosterone production in rats, and its involvement mechanism. Methods Male and female rats (F0 and F1 respectively) for 160 days, respectively. The contents of testosterone (T), luteinizing hormone (LH), and follicle stimulating hormone (FSH) in serum were detected in 20 months of F0 generations, and 15 months of F1 generations. RT-PCR was used to analyze the levels of StAR mRNA and P450scc mRNA. Results Compared with the normal control group, the testosterone contents in exposed F0 and F1 generations increased, the lowest was 51.73 U/L, but those of LH and FSH decreased. The expression of StAR mRNA in the low-doze group of F1 generation (StAR/β-actin = 1.35) was up-regulated, down-regulated for other groups.compared with the normal control group (P450scc/β-actin = 0. 313), the expression of P450scc mRNA in the low- and high-dose groups of F0 generation were decreased (P450scc/β-actin = 0.21), and those in the low- and high-dose groups of F1generation were increased (P450scc/β-actin = 0.623) (P ≤ 0.01). Conclusion Long-term DU exposure inhibit the male reproduction by intervening the sexual hormone production through down-regulated the expression of StAR mRNA and P450scc roRNA.

Objective To establish the benign prostatic hyperplasia evaluation index system for nursing quality. Methods Indicators framework for perioperative nursing quality evaluation index system was built up by the theoretical research, clinical research, expert meetings approach firstly, then the Delphi method was used to screen and verify the indicators. Results Two rounds of consultation questionnaires were collected with rate of 86.0%, 95.3% respectively, the first round of consultation had the retention of 13 indicators, removed 4 indicators of those. After the second round, the average score of important target was no less than 8.0, and more than half of indicators had a full mark, coefficient of variation targets no higher than 0.20 were up to 100%. Coefficient of concordance of two rounds were 0.241 and 0.433 respectively. ConclusionsAfter two rounds of consultation, there were 13 quality indicators left and experts had well authoritativeness and representative.

AIM　To compare the bioactivity and bioavailability of domestic and imported salcaltonin injections in Chinese healthy volunteers. METHOD　Using randomized cross design, to determine the concentrations of calcium and salcaltonin in serum of healthy volunteers after single dose of domestic and imported injections. RESULT　Two preparations reduced concentration of calcium in serum obviously and there was no difference of mean changes of calcium between the two kinds of injections (P>0.05). The main pharmacokinetic parameters are: Cmax: (2.31±0.16) μg*L-1 and (2.44±0.20) μg*L-1；Tmax: (48.75±12.99) min and (52.50±16.31) min；T1/2ke: (92.93±11.86) min and (97.61±11.23) min；Ke: (0.0079±0.0023) min-1 and (0.0084±0.0014) min-1；AUC(0～360 min): (297.70±44.45) μg*min*L-1 and (313.64±46.03) μg*min*L-1 respectively in domestic and imported salcaltonin injections. The relative bioavailability of domestic formulation is 97.6%±25.6%. CONCLUSION　The domestic and imported salcaltonin injections administered produce similar biological response and bioavailability and they are bioequivalent.

Objective To explore the changes of renin-angiotensin-aldosterone system in pediatric severe sepsis treated with continuous blood purification(CBP).Methods Prospective study,35 cases of critically ill children diagnosed with severe sepsis and admitted to PICU of Shanghai Children's Hospital of Shanghai Jiaotong University from June 2012 to May 2014 served as reseach objective.Based on the monitoring of vital signs,including central venous pressure,arterial blood pressure,mean arterial pressure,patients were treated with conventional therapy,as antibiotics,fluid therapy,and CBP by mode of continuous veno-venous hemodiafiltration or high volume hemofiltration.Plasma levels of rennin activity,angiontensin Ⅱ and aldosterone were measured by radioimmunoassay before and 24 h after CBP.Twenty-five cases of blood samples taken from the children collected from health care for liver function examination were matched as control group.Results Plasmalevelsofrenninactivitywere(2.11 ±1.93) pg/(L·h),(1.27±1.56) μg/(L·h),(0.37 ± 0.22) μg/(L· h) before and 24 h after CBP and control group,respectively.The levels of angiontensin Ⅱ were (426.78 ±332.37) ng/L,(364.40 ± 325.51) ng/L,(41.70 ± 10.81) ng/L,respectively.And the levels of aldosterone were (255.12 ± 218.18) ng/L,(134.92 ± 104.13) ng/L,(106.88 ±43.18) ng/L,respectively.The plasma levels of rennin activity,angiontensin Ⅱ,and aldosterone were higher in sepsis cases than in control group,while decreased obviously after CBP treatment(P ＜0.01,P ＜0.05).Eleven cases died and mortality was 31.4％ (11/35).After 24 h of CBP,the mean arterial pressure improved in 26 cases with septic shock and dopamine dose reduced(P ＜ 0.01).Conclusion The reaction of renin-angiotensin-aldosterone system is increased significantly in pediatric severe sepsis.CBP can down-regulate the levels of rennin activity,angiotensin Ⅱand aldosterone,but not worsen the circulation function.