Adolescent ; Adult ; Aged ; Calcaneus ; injuries ; surgery ; Female ; Follow-Up Studies ; Fracture Fixation, Internal ; adverse effects ; Fractures, Bone ; physiopathology ; surgery ; Humans ; Male ; Middle Aged ; Postoperative Complications ; pathology ; physiopathology ; Recovery of Function ; Retrospective Studies ; Young Adult

Objective To evaluate the role of intercellular gap junction in lung injury induced by hemorrhagic shock and resuscitation in rabbits. Methods Twenty-four healthy rabbits of both sexes weighing 1.5-2.2 kg were used in this study. The animals were anesthetized with iv 3% pentobarbital 30 mg/kg,tracheostomized and mechanically ventilated. Femoral artery was cannulated for MAP monitoring, blood-letting.Right external jugular vein was cannulated for fluid infusion. Hemorrhagic shock was induced according to the method described by Wiggers. MAP was maintained at 35-40 mm Hg for 60 min. The animals were then randomly divided into 2 groups (n = 12 each):traditional treatment group (group A) and octanol group (group B). Both groups received rapid iv infusion of lactated Ringer's solution (LR solution) 1.5 ml·kg-1 ·min-1 for 30 min (T3 ).In group B 99.5% octanol (a specific gap junction inhibitor) 5 mmol/kg was injected intraperitoneally (IP) in addition to iv LR solution infusion. Thirty minutes later the animals were resuscitated with infusion of the blood withdrawn and LR solution (the volume was equal to the volume of blood loss). Then LR solution was infused iv at 2.5 ml· kg-1 · h-1 for 150 min ( T4 ). Left ventricular systolic pressure (LVSP) and HR were recorded before blood letting (T1), immediately after successful establishment of the model (T2), and at T3 and T4. The mortality during resuscitation was calculated. The animals were killed at T4. Blood samples were taken from femoral artery for determination of the serum protein concentration. The lungs were removed. The left lower lobe was lavnged. The protein concentration in broncho-alveolar lavage fluid (BALF) was measured. Lung permeability index (LPI) was calculated (LPI = protein concentration in BALF protein concentration in serum). Na+-K+-ATPase and Ca2+-ATPase activities and W/D lung weight ratio were determined and microscopic examination was performed. Results HR was significantly lower at T3 and T4 and LVSP higher at T4 in group B than in group A. The pulmonary permeability index, W/D lung weight ratio and mortality were significantly lower and the activities of Ns+-K+-ATPase and Ca2+ -ATPase were significantly higher in group B than in group A. The lung tissue danage was significantly ameliorated in group B. Conclusion Intercellular gap junction is involved in the development of lung injury induced by hemorrhagic shock and resuscitation in rabbits.

Objective To investigate the effects of hypothermia combined with sevoflurane on myocardial monophasic action potential (MAP) and transmural dispersion of repolarization (TDR) of the left ventricle in rabbits in vitro. Methods Adult rabbits weighing 1.5-2.0 kg were sacrificed after heparinized and anesthetized.The hearts were immediately removed and perfused with K-H soluation saturated with 95%O2-5%CO2 at 37℃ in a Langendorff apparatus. Forty-eight isolated hearts were randomly divided into 6 groups ( n = 8 each): Ⅰ control group (group C), Ⅱ low concentration sevoflurane group ( group S1 ), Ⅲ high concentration sevoflurane group (group S2 ), Ⅳ hypothermia group (group H), Ⅴ hypothermia + low concentration sevoflurane (group HS1 ) and Ⅵ hypothermia + high concentraion sevoflurane (group HS2 ).Group C received continous perfusion. Group S1and S2 received perfusion with K-H solution saturated with 2.4% and 4.8% sevoflurane at 37 ℃ for 30 min respectively. Group H received perfusion with K-H solution at 30℃ for 30 min. Group HS1 and HS2 received perfusion with K-H solution saturated with 2.4% and 4.8% sevoflurane at 30℃ respectively.MAPs of epicardium, mid-myocardium and endocardium of the left ventricle were recorded. MAP duration at 90%repolarization(MAPD90)and TDR were calculated. Early after-depolarization,delayed after-depolarization and arrhythmia were also recorded. Results Compared with group C, MAPD90 of the 3 layers of ventricle was significandy prolonged, the incidence of arrhythmia increased in group H (P＜0.05). There was no significant difference in TDR among all groups ( P＞0.05). There was no interaction between sevoflurane and hypothermia (P＞0.05), and it only showed that MAPD90 was prolonged by hypothermia (P ＜0.05 ). Conclusion Hypothermia combined with sevoflurane exerts no significant effects on myocardial MAP and TDR of ventricles in rabbits, and sevoflurane decreases the incidence of hypothermia-induced arrhythmia through inhibiting the prolongation of MAPD90.

Objective To investigate the effects of hypothermia combined with sevoflurane on expression of myocardial gap junction protein connexin 43 (Cx43) in isolated rabbit hearts.Methods Healthy adult rabbits of both sexes,weighing 1.5-2.0 kg,were sacrificed after anesthetization.The hearts were rapidly excised and perfused in a langendorff apparatus with K-H solution saturated with 95％ O2-5％ CO2 at 37 ℃ in a langendorff apparatus.Forty isolated hearts were randomly divided into 4 groups (n =10 each):control group (group C),hypothermia group (group H) and hypothermia combined with sevoflurane group (group HS).At 15 min of equilibration,the perfusion with K-H solution was continued at 37 ℃ in group C,K-H solution saturated with 2.4％ sevoflurane was perfused at 37 ℃ in group S,K-H solution was perfused at 30 ℃ in group H,and K-H solution saturated with 2.4％ sevoflurane was perfused at 30 ℃ in group HS.At 30 min of perfusion,myocardial specimens were obtained from the anterior wall of the left ventricle for detection of the expression of Cx43 in myocardial cells (by immunohistochemistry and Western blot).Results Compared with group C,Cx43 expression was downregualted in group H (P ＜ 0.05),and no significant change was found in Cx43 expression in S and HS groups (P ＞ 0.05).Cx43 levels distributed mainly in the intercalated disc in S and HS groups,and in H group the distribution of Cx43 levels in the intercalated disc was less,but the percentages of lateralized Cx43 were increased.Conclusion Sevofurane can inhibit hypothermia-induced down-regulation and distribution disturbance of myocardial Cx43 expression,which may be the mechanism by which sevofurane inhibits hypothermia-induced arrhythmia.

Objective To investigate the effects of different concentrations of propofol on the apoptosis in hippocampal neurons in neonatal rats in vitro.Methods Primary hippocampal neurons were prepared from newborn Sprague-Dawley rats (aged 7 days) and cultured for 7 days.The neurons were randomly divided into 7 groups (n =8 each):control group (group C),propofol 4,8 and 12 μg/ml groups (groups P1-3),and fat emulsion 4,8and 12 μg/ml groups (groups F1-3).The cells were cultured for 24 h in the culture medium containing propofol 4,8 and 12μg/ml in groups P1-3,respectively.The cells were cultured for 24 h in the culture medium containing fat emulsion 4,8 and 12 μg/ml in groups F1 3,respectively.The cell morphology was examined by microscopy after 24 h culture.The expression of caspase-3 (by immuno-histochemistry) and neuronal apoptosis were detected.The neuronal apoptosis rate was calculated.Results Compared with group C,the neuronal apoptosis rate and caspase3 expression were significantly increased in groups P1-3 (P ＜ 0.05 or 0.01).The neuronal apoptosis rat and caspase-3 expression were increased in a concentration-dependent manner in groups P1-3 (P ＜ 0.05).The neuronal apoptosis rate and caspase-3 expression were significantly lower in groups F1-3 than in groups P1-3 (P ＜ 0.05).There was no significant difference in the neuronal apoptosis rate and caspase-3 expression between groups F1-3 (P ＞ 0.05).The damage to neurons was induced in groups P1-3 and most severe in group P3.Conclusion Propofol can promote the apoptosis in hippocampal neurons in neonatal rats in vitro in a concentration-dependent manner.

Objective To detect the expression of EGF mRNA in renal parenchyma in congenital hydronephrosis in children and to evaluate the role of EGF in causing chronic renal damage. Methods The expression of EGF mRNA in renal parenchyma, renal pelvis and PUJ tissues from congenital hydronephrosis in children was studied by means of RT PCR. Results The expression of EGF in the aff ected renal parenchyma and PUJ tissues decreased.It also decreased in the affected pelvis but the difference was not significant. The decrease of EGF expression was the most obvious in the affected renal parenchyma. Conclusions EGF expression decreased in renal parenchyma in congenital hydronephrosis and the decrease might be related to the chronic renal damage and renal atrophy caused by hydronephrosis.

Objective To investigate the relationship between plasma leptin levels and obesity,plasma glucose as well as insulin concentrations.Methods Fasting plasma leptin concentrations were measured with IRMA in 171 cases (including 84 type 2 DM,36 IGT,51 NGT;90 men,81 women),and oral glucose tolerance test was done in every case to measure plasma glucose and insulin concentrations.Height,body weight were measured to calculate body mass index (BMI).Results Fasting plasma leptin levels are correlated with BMI( r=0.6772,P

OBJECTIVE:To investigate rules and characteristics of the adverse drug reactions(ADR)induced by monoclonal antibodies,and provide reference for rational drug use. METHODS:The literatures of ADR induced by monoclonal antibodies from Jan. 1979 to Dec. 2014 were retrieved and analyzed. RESULTS:Among the 132 ADRs induced by monoclonal antibodies,57 were male(43.18%),75 were female(56.82%),the ratio of male to female was 1∶1.3,the youngest was 2 years old,and oldest was 111 years old;Adalimumab dominated monoclonal antibody drugs(70 cases,53.03%);there were a maximum of ADR(44) within 1 d,accounting for 33.33%;ADR induced by monoclonal antibodies mainly were skin lesions (20.72%),systemic reac-tions(18.42%)and cardiovascular system damage(16.78%),with the specific performance of rash,itching,chills,fever,palpi-tation,rapid heartbeat and so on. CONCLUSIONS:ADR induced by monoclonal antibodies is more common in the clinic. The clin-ic should timely promote and strengthen the patients' care to ensure safe drug use and improve level of clinical treatment.

Objective To evaluate the clinical value of serum MUC1(sMUC1)in the patients with multiple myeloma.Methods The enzyme linked immunosorbent assay(ELISA)was used to compare the sMUC1 levels in the 12 cases of newly diagnosed multiple myeloma.15 cases of post-chemotherapy and 46 healthy donors.Results The mean concentration of sMUC1 in the newly diagnosed patients with multiple myeloma was 33.44 U/ml(10.86～88.80 U/ml).In the patients of post-chemotherapy the mean concentration was 11.6U/ml(3.92～22.22 U/ml),and in the healthy donors the concentration was 12.81 U/ml(3.84～30.45 U/ml).The level of sMUC1 in the new diagnosed patients was significandy higher than that in the patients of post-chemotherapy(P=0.001)and healthy donors(P=0.000).There was no significant difference between post-chemotherapy and healthy donors(P=0.461).Conclusion sMUC1 may be one of the tumor markers for the diagnosis of multiple myeloma.sMUC1 could also be used as one of the indicators of prognosis and the evaluation of the chemotherapy efficacy.sMUC1 might be a potential target for the immunotherapy to the patients with multiple myeloma.

Objective To evaluate the efficacy of aminophylline for prevention of the negative chronotropic effect of remifentanil.Methods Forty patients undergoing general anesthesia,aged 20-55 yr,with body mass index of 18-25 kg/m2,of ASA physical status Ⅰ or 1Ⅱ,were randomly divided into control group (group C) and aminophylline group (group AP),with 20 patients in each group.At 30 min before induction of anesthesia,normal saline 20 ml was infused intravenously in group C,and aminophylline 3 mg/kg was infused intravenously in group AP.Midazolam 0.1 mg/kg was then injected intravenously.Remifentanil 2 μg/kg was injected intravenously after the patients fell asleep and then artificial ventilation was performed.Vecuronium 0.1 mg/kg,fentanyl 3 μg/kg,and etomidate 0.3 mg/kg were injected intravenously 7 min later.The patients were then endotracheally intubated and mechanically ventilated.HR and MAP were recorded before induction of anesthesia (T0),after falling asleep (T1),and at 0,1,3,5 and 7 min (T2-6) after the end of remifentanil injection.Low frequency (LF) and high frequency (HF) were recorded at T0,T1 and T2,and the ratio of LF/HF was calculated.Results Compared with the baseline value at T0,MAP and HR were significantly decreased at T2-6 in the two groups,and LF and HF were decreased at T1,and LF/HF ratio was increased at T1 in group AP.HR and LF/HF ratio were significantly higher,and LF and HF were lower at T1 in group AP than in group C.Conclusion The efficacy of aminophylline for prevention of the negative chronotropic effect of remifentanil on the hearts of patients is good.