Objective:To investigate the potential value and feasibility of MG132 as a new therapy method for the ovarian cancer and a cisplatin chemotherapy-synergistic agent.Methods:The mode of the nude mice transplanted tumor tissues of ovarian epithelial carcinoma were established,20 nude mice were randomly divided into four groups and were all intrapedtoneal injected,once a day,a total of seven days:①Control group(0.2 ml saline),②MG132 group(2 mg/kg),③Cisplatin group(1 mg/kg),④Combination group[MG132(2 mg/kg) + cisplatin (1 mg/kg)].The weight inhibitory rates of tumors in each group were compared after four weeks.The expressions of Caspase3,Beclin1 in each group were detected by IHC,FIA,western blot and RT-PCR.Results:①The inhibitory rate of tumors in cisplatin group,MG132 group,and combination group was 53.85％,15.38％,88.46％,respectively,the additive effect of cisplatin and MG132 combination therapy was 60.95％.②IHC,FIA,western blot detected that compared to control group,the positive expressions of Beclin1,Caspase3 were increased in cisplatin group,MG132 group,and combination group,among which combination group increased more.③RT-PCR detected that the mRNA relative quantity of Beclin1 in cisplatin group,MG132 group,combination group respectively were higher than that of control group(P＜0.05);and it was higher in combination group than that of cisplatin group and MG132 group(P＜0.05).Conclusions:The growth of nude mice transplanted tumor tissues of ovarian epithelial carcinoma can be inhibited by MG132,and has a synergistic effect for treating ovarian cancer by combination with cisplatin,it is expected to be an effective anti-tumor drug for platinum resistant refractory ovarian cancer.

Objective To study the effects of ulinastatin on oxidative stress factors and renal function in rats with severe heatstroke. Methods-Forty-two male SPF Wistar rats were randomly divided into normal control group (group C, n=6), heat stroke group (HS group, n=18) and ulinastatin treatment group (UTI group, n=18). Rats in the HS group and UT group were placed in an artificial climate chamber to induce HS, while rats of group C were kept at room temperature (23±0.2°C). UT rats were given by intraperitoneal injection of ulinastatin before model reproduction in a dose of 100 thousand units/kg, and it was repeated every 12h. The other in the rest two groups were injected with equal amount of normal saline. All the rats were sacrificed in batches at 0, 6 and 24h after successful modeling. Before death, blood samples were collected to determine serum creatinine and urea nitrogen with automatic biochemical analyzer. Meanwhile the concentrations of renal superoxide dismutase (SOD), glutathione peroxidase (GPx) and malondialdehyde (MDA) were determined with colorimetric method. Pathological changes in renal tissue of all animals were observed at 24h after model replication with light and electron microscopy. Results-Compared with rats in group C, the MDA levels at 0h after onset of heatstroke increased significantly (P<0.05) in the renal tissue of HS and UTI group, and they were also significantly higher at 6 and 24h although they began to fall afterward (P<0.05). The MDA level was significantly lower in the UTI group than that in the HS group at each time point (P<0.05). The levels of SOD and GPx in the rat kidney tissue of HS group were lower than that of group C at 6h after successful model replication (P<0.05), while there was no significant decline in UTI group compared with group C (P>0.05). At the same time, compared with HS group, the elevated levels of serum Cr and BUN in the UTI group were lower at 6 and 24h after heatstroke onset (all P<0.05). The pathological damage of the kidney at 24h after heatstroke was significantly ameliorated in the UTI group. Conclusions-Oxidative stress is involved in the pathogenesis of the renal injury during heatstroke, UTI may protect rats with heatstroke from renal injury by inhibiting oxidative stress in the kidney.

Objective To study the expression of interferon regulatory factor 1 (IRF-1) in patients with systemic lupus erythematosus (SLE) and the influence of prolactin (PRL) upon it. Methods The level of serum PRL in quiescent condition was examined by electrochemiluminescence-meter in 30 patients with SLE and 20 healthy controls. Peripheral blood mononuclear cells (PBMC) were separated from all the subjects by gradient centrifugation density, and cultured with or without the presence of recombinant human PRL (rhPRL) for 24 hours. The expression of IRF-1 gene in cultured PBMC was detected by reverse transcriptase-PCR (RT-PCR) with gel image scanning. Results The relative value of IRF-1 gene expression was significantly higher in SLE patients than in normal controls (0.89±0.21 vs 0.78±0.18, P=0.026), and in SLE patients with high PRL than in those with normal PRL (1.06±0.26 vs 0.82±0.21, P=0.005). However, there was no significant difference between SLE patients with normal PRL and healthy controls in regard to the expression of IRF-1 gene (P=0.514). The stimulation with rhRPL significantly elevated the relative expression of IRF-1 gene in SLE patients with normal PRL (0.99±0.22 vs 0.82±0.21, P=0.036), but had no obvious effect on that in the normal controls. Conclusion The study reveals a high expression of IRF-1 gene in SLE patients, which may be related to the high level of PRL.

Objective:To develop an economical,simple and portable device for imitation of ship shock motion produced by non-contacting under water explosion.Methods:The device was developed based on aerodynamical principles and sensor detection technology,and was tested with animal experiments to verify its performance.The injuries caused by 4 grades of shock motions with different accelerations,duration and displacement were observed in 40 black rabbits(10 for each grade).Results:The device was safe and functionally stable,with a peak acceleration of 1 000 m/s~2,a shock duration of about 2 ms and a device displacement of 100 mm.The accelerations of 4 shock motion grades were significantly different and with good reproducibility.The damage to the rabbits were mainly haemorrhage of different extents in organs of pleuroperitoneal cavity,especially in the lungs,but no rupture of organs was found.The degree and involvement of damage had an increasing tendency with the increase of acceleration of shock motion.Conclusion:The device we developed can imitate the effects of ship shock motion.

Animals ; Carnitine ; pharmacology ; H(+)-K(+)-Exchanging ATPase ; metabolism ; Mitochondria, Muscle ; enzymology ; Muscle, Skeletal ; drug effects ; Physical Conditioning, Animal ; Rats

Objective To observe the effect of different temperatures on endoplasmic reticulum stress, calcium overload, mitochondria and cell damage in pulmonary microvascular endothelial cells (PMVEC) induced by heat stress, and clarify the mechanism of endothelial cell injury in the process of heat stress to provide experimental basis for clinical prevention and treatment of heat stree. Methods Heat stress model of PMVEC cell was set up. Control group cells were incubated at 37℃, 5%CO2, while heat stress group cells were incubated at 39℃, 41℃, 43℃ for 2h, respectively, then further incubated at 37℃, 5%CO2 for 6h. Pretreatment of cells with 20μmol/L BAPTA-AM or 50μmol/L CsA before heat stress at 43℃. The protein levels of p-PERK, PERK p-eIF2a, eIF2a, ATF4 and GRP78 were analyzed by Western blotting. Intracellular Ca2+, mitochondrial membrane potential and the changes in mitochondrial permeability transition pore were investigated by flow cytometry. The change of caspase-3 was detected by Caspase Assay Kit. Millicell-ERS Volt-Ohm Meter and Accessories was used for determining the changes of transepithelium electrical resistance (TER). Results Compared with the control group, with the increase of heat stress temperature (41-43℃), the phosphorylation of p-PERK and p-eIF2a protein and the expressions of ATF4 and GRP78 proteins were gradually activated, intracellular Ca2+ increased, MPTP pore was opened, mitochondrial membrane potential decreased, cell permeability increased and apoptosis occurred, and it was the most obvious in the 43℃ heat stress group, and the difference was statistically significant (P<0.05). Pretreatment with Ca2+ inhibitors promoted the recovery of the MPTP hole, mitochondrial membrane potential and cell permeability, and reduced the occurrence of apoptosis. While pretreatment with the mitochondrial protective agent did not reduce the release of Ca2+, but it could promote the recovery of cell permeability and reduce the occurrence of apoptosis. Conclusion Heat stress activates endoplasmic reticulum stress response, induces intracellular Ca2+ overload mediated cell and mitochondrial damages in PMVEC cells, which may be one of the important mechanisms of endothelial cell injury induced by heat stress.

Objective:To discuss the therapeutic effect of blood purification on hemorrhagic fever with renal syndrome combined with acute renal failure.Methods:60 patients with hemorrhagic fever with renal syndrome combined with acute renal failure were selected,and they were divided into two groups according to the odd and even number of hospitalization.The observation group (31 cases) received hemodialysis therapy.The control group (29 cases) received veno-venous hemofiltration therapy.The renal function,serum ion,blood routine indexes and the incidence of adverse reactions during treatment was detected and compared between two groups.Results:There were no statistical significance on K+,HCO3-,BUN,Cr between two groups (P＞0.05).After treatment,the K+,BUN,Cr levels were decreased in two groups (P＜0.05).The values of observation group were lower than those of the control group (P＜0.05).The level of HCO3-was increased in two groups,and it was higher in observation group than that of the control group (P＜0.05).Before treatment,there was no statistical significance on Hb,Hc,PLT between two groups (P＞0.05).After treatment,the Hb,Hc,PLT levels were increased in two groups (P＜0.05),but there were no statistical significance between two groups (P＞0.05).During 1 year of follow-up,the 6 months and 12 months survival rate of observation group was higher than that of the control group (P＜0.05).During treatment,there were no statistical significance on the incidence of adverse reactions between two groups (P＞0.05).Conclusions:The hemofiltration therapy has a good therapeutic effect on blood purification on hemorrhagic fever with renal syndrome combined with acute renal failure,and it can regulate the electrolyte balance,improve the renal function and increase the survival rate,which is equivalent to veno-venous hemofiltration therapy in amelioration of blood state.

Objective To summarize the clinical characteristics and evaluate the feasible treatments of primary breast lymphoma (PBL).Methods The clinical data of 34 PBL patients (age 24-79 years) who were treated in our hospital between April 2006 and December 2013 were reviewed.Of these 34 patients, 18 had stage ⅠE PBL and 16 had stage ⅡE PBL.Pathological types included diffuse large B cell lymphoma (29 patients), anaplastic large cell lymphoma (2 patients), marginal zone lymphoma (2 patients), and mantle cell lymphoma (1 patient).Two patients underwent surgery, four patients received chemotherapy alone, five patients received chemoradiotherapy, fourteen patients underwent surgery plus chemotherapy, and nine patients underwent surgery plus chemoradiotherapy.The 5-year overall survival (OS) and progression-free survival (PFS) rates were determined by the Kaplan-Meier estimator.Results During follow-up, 26 patients were alive without lymphoma and 8 patients had died by the end of follow-up (7 died from lymphoma and 1 died from chemotherapy-related hepatic failure).Among the 6 patients who relapsed, 5(83.3%) had recurrence within the first 2 years of treatment.In particular, 1 patient who had bilateral breast involvement developed left breast relapse after bilateral mastectomy and chemotherapy, 2 patients had bone marrow metastasis, 1 patient had lung and mediastinal lymph node metastases, and 2 had skin relapse.The 5-year OS and PFS rates of all patients were 75% and 75%, respectively.Conclusions Since PBL is a rare malignancy, its overall prognosis is fair and the incidence of local relapse is low with chemotherapy alone or in combination with other treatments.However, further studies on the development of more effective treatments will be required for patients who have failed the existing treatments.

Objective To analyze and summarize the clinical effect of peripherally inserted central catheters (PICC) guided by B-ultrasound,and to discuss the catheterization skills of PICC guided by B ultrasound.Methods Retrospectively analyzed the clinical data of 102 patients recieved PICC guided by ultrasound in neurosurgery department of Chongqing emergency medical center from January 2016 to May 2017.The success rate of one-time puncture, the success rate of one-time catheter delivery and the number of complications were analyzed, and the causes and treatment methods of complications were analyzed.Results Of the 102 cases,94 cases were successfully punctured in one time,6 cases were punctured twice,and 2 cases were punctured more than 2 times.The one-time puncture success rate was 92.16%.Catheter misplacement occurred in 5 patients,and postoperative complications occurred in 2 patients.Conclusion Mastering the related angiotomy and imaging knowledge of PICC and using the B-ultrasound guidance system to insert the catheter can improve the success rate of catheterization and reduce the postoperative complications.

A new fluorescent method was developed based on the ulifloxacin-europium（Ⅲ）-sodium dodecylbenzene sulfonate system for the determination of ulifloxacin,the active metabolite of prulifloxacin.Sodium dodecylbenzene sulfonate formed a ternary complex with ulifloxacin-europium（Ⅲ）and significantly enhanced the characteristic fluorescence of europium（Ⅲ）.The enhanced fluorescence intensity showed a good linear relationship with the concentration of ulifloxacin in the range of 5.0×10^-8-2.0×10^-6M with a detection limit of 2.0×10^-10 M（3σ）.This method is rapid and sensitive,and has been successfully applied to the determination of ulifloxacin in human urine and serum samples.