We investigated the mechanism of tolerance induction by identifying differences in infiltrating cell population and Ig subclasses deposition between tolerant and rejecting rat liver allografts.There were occasional minor differences in the T cell or CD11 b/c+(monoeyte/macrophage/granulocyte)infiltrate.By contrast,there was a major difference in B cell infiltrate with more B cells in tolerant grafts.IgM was increased in both tolerant and rejecting livers while deposition of IgG1 was observed in rejecting but not in tolerant livers.

Objective To study the toxicokinetics of phthalates in male rabbits. Methods Concentrations of DEHP or DBP in plasma of 6 healthy male rabbits were determined by RP-HPLC after constant rate infusion of 0.5 g/kg DEHP or DBP(IV). The toxicokinetic parameters were computed by 3P87 program. Results The toxicokinetic model of DEHP and DBP were both first-order elimination and two-compartment model with constant rate infusion. The main toxicokinetic parameters of DEHP were as follows: distribution phose t1/2(?)=0.101 h; elimination phase t1/2(?)=12.701 h; CLs=0.013 g?kg-1?h-1. The main toxicokinetic parameters of DBP were as follows: t1/2(?)=0.441 h; t1/2(?)=31.311 h; CLs=0.021 g?kg-1?h-1. Conclusion DEHP and DBP were both first order elmination and two-compartment medol with constand rate intusion(IV). DEHP and DBP could be rapidly eliminated in male rabbits.

Objective To analyse the factors influencing the death of patients with aortic dissection (Stanford type A arota dissection) who underwent urgent surgery.Methods The clinical data of 197 patients with aortic dissection (Stanford type A arota dissection) treated with urgent surgery from the First Affiliate Hosiptal of Xinjiang Medical University were retrospectively analyzed between January 2009 and June 2015 in order to determine the factors influencing the early-mortality.Results Of them,23 patietns dead.In univariant analysis,the rate of mortality was 11.68％.The following factors at admission were independetly associated with early-mortality:hypertension,coronary atherosclerotic heart disease,LVEF ≤ 50％,time consumed for CPB ≥ 180 min,time required for cross-clamping aorta ≥ 120 min,Cr ≥ 130 μmol/L,rethoracotomy for hemostasis (P ＜0.05).The preoperative renal failure (Cr≥130 μmol/L) and time consumed for cross-clamping aorta ≥ 120 min were strongly associated with the early-mortality based on the logistic regression analyses.Conclusions The risk of aortic dissection surgery is very high,and it is mondatory to carefully evaluate the patient' s general condition and the indications during peroperative period,and to take active measures to shorten the time of clamping aorta and total operation time in order to reduce the risk of operation and increase the survival rate of patients.

Objective:To study the effect of breviscapine on visual function of the patients with primary open-angle glaucoma after filtration surgery. Methods:Twenty-nine cases (42 eyes) of patients with primary open-angle glaucoma at middle and late stage after filtration surgery were selected and randomly divided into the experimental group and the control group according to the defect degree of visual field. The 15 patients (21 eyes) in the experimengtal group ( TG) were intravenously injected 250ml saline containing 50mg breviscapine, while the 14 patients (21 eyes) in the control group (CG) were intravenously injected 250ml saline containing 1g vita-min C. The treatment course was 2 weeks followed by one-week withdrawal. After three treatment courses, the visual function in the two groups was investigated and compared before and after the treatment. Results:After the treatment, the visual field defect value and the thickness of retinal nerve fiber layer of the patients in TG were both better than those before the treatment (P<0. 01,P<0. 05). The values of visual acuity and visual field defect of the patients in TG were significantly better than those of the patients in CG ( P<0. 05, P<0. 01). Conclusion:After intraocular pressure is controlled, breviscapine injection can reduce the vision damage of patients with primary open-angle glaucoma at middle and late stage after filtration surgery and improve the visual field defect.

Objective To explore the kinds and levels of phthalates leaching from disposable plastic products. Methods Samples of peritoneal dialysis solution, blood preservative solution, infusion instruments, preservative film, disposable plastic bags and water in plastic bottles were analyzed for phthalates by RP-HPLC after liquid-liquid extraction and/ or solid phase extraction. Results Di(2-ethylhexyl) phthalate (DEHP) was leached from all medical instruments, the maximum level of which reached 77.51?g/ L. Di-n-butyl phthalate was leached from disposable plastic bags, the level of which reached 91.45?g/ kg. Phthalates were not found in samples of preservative film and water in plastic bottles. Conclusion As DEHP leaching from the medical instruments might directly enter the human body, attention should be paid to its health hazards.

Objective:To explore the immunity provided to BALB/c mice by immunization with the recombinant ricin B chain protein (rRTB). Methods:Female BALB/c mice were randomly selected into rRTB-vaccinated group and PBS group. Mice were subcu-taneously (s. c. ) injected four times with 14 days immunization time interval. Changes of antibodies (IgG,IgG1and IgG2a) in serum were detected by ELISA. Meanwhile,the expression of IL-4 and IFN-γ were detected by flow cytometry. Results:The mean IgG titers reached 106 after the fourth immunization and a strong secondary response was induced in vaccinated mice when challenged with toxin. There was significant difference between rRTB-vaccinated group and PBS group ( P<0. 05 ) . The same result was shown in IgG1. However,no changed was detected in IgG2a. Meanwhile,there was significant difference for IL-4 between two groups (P<0. 05), while no significant difference for IFN-γwas observed. Conclusion:rRTB can produce higher levels of antigen-specific antibodies ( IgG and IgG1),and cytokine (IL-4) of splenocytes,which means the recombinant protein can induce the Th2-type immune response and trigger a good immune response. rRTB may be a potentially valuable vaccine candidate against human exposure to AT.

Objective To investigate the safety of different intensity anticoagulation therapy of warfarin in preventing thromboembolism in octogenarian patients with nonvalvular atrial fibrillation (NVAF). Methods The 130 patients with persistent or permanent NVAF were randomly divided into three groups: low-intensity warfarin group (35 cases, international normalized ratio, INR (1.5-2.0), moderate-intensity warfarin group (32 cases, INR 2.1-2.5) and aspirin control group (63 cases). The rate of hemorrhagic events and the effect on renal function were observed. Results The incidence of hemorrhage was the lowest in low-intensity warfarin group compared to the other groups with slight bleeding in one case. life-threatening bleeding in one case, severe bleeding in one case and slight bleeding in four cases occurred in moderate-intensity warfarin group. Life-threatening bleeding in three cases, severe bleeding in two cases and slight bleeding in six cases occurred in aspirin control group. There were significant differences in bleeding incidence among the three groups (χ2=5.13,P＜0.05). The low-intensity warfarin group and moderate-intensity warfarin group were superior to the aspirin control group in the effect on renal function (P＜0.05). Conclusions It is safe that the dose of warfarin is maintained at low anticoagulation intensity between INR 1.5 and 2.0 in octogenarians with NVAF.

Objective To provide reference for effective scientific literature novelty assessment by investigating its recognition in medical and health staff of a military area command and their use of information resources and need of information .Methods Knowledge of scientific literature novelty assessment , satisfaction of scientific literature novelty assessment report, need and use of information resources were investigated in 149 staff of 9 hospitals with self-de-signed questionnaire .Results The general recognition and satisfaction levels of scientific literature novelty assess-ment were good in medical and health staff of a military area command .However , the information resources were insufficiently used , which was related with the scientific research level and scientific literature novelty assessment popularization .Conclusion Scientific literature novelty assessment should be popularized , staff engaged in scientific literature novelty assessment should be trained, sharing of information resources should be strengthened , and infor-mation service should be expanded and deepened in military area commands.

Objectives To explore suitable conditions for establishing food allergy model through sensitization by in-traperitoneal injection (i.p) with low-dose ovalbumin (OVA) and challenge by gavage with high-dose OVA in SD young rats, and to evaluate the model. Methods Sixteen three-week-old female SD young rats were randomly divided into two groups with 8 rats each. SD young rats in food allergy (FA) group were ifrst sensitized by intraperitoneal injection with 0.2 ml suspension mixed with 40 μg OVA and 1mg Al(OH)3 on the ifrst day (d 0), then intraperitoneally injected with 0.2 ml (40 μg) OVA solution on days 2, 4, 7, 9 and 11, and lastly challenged by gavage with 2.0 ml (15 mg/ml) OVA solution on days 20, 24, 28 and 30. The rats in the control group were intraperitoneally injected and gavaged with the same volume of normal saline instead of OVA during the same period. The eosinophils (EOS), mast cells (MC), the integrity of MC in intestinal mucosa of two groups were observed, and ovalbumin speciifc IgE (OVA-IgE) levels in serum were analyzed. Results The rats in FA group had lusterless hair and diarrhea, and compared with control group, OVA-IgE levels were increased signiifcantly (P<0.05). Compared with control group, the intestinal mucosa of jejunum, ileum and colon in FA group had more damage, with more EOS and degranu-lated MC aggregated (P<0.01). Conclusions The allergy model established through sensitization by intraperitoneal injection with low-dose OVA mixed with adjuvant Al(OH)3 and challenge by gavage with high-dose OVA in young rats had clinical features and intestinal pathological changes consistent with food allergy infants and it was an ideal food allergy model in SD young rats.

Objective To understand the diagnostic value of blink reflex (BR) in central neuropathy by observing the variations of blink reflex in diabetic patients. Methods Electrical pulse was used to stimulate the supraorbital nerve at the supraorbital notch. The responses of bilateral orbicular muscles of the eye were recorded, the variations of the latency and amplitude of R 1 and R 2 recorded on the side of stimulation and of R′ 2 recorded on the contralateral side were measured. Results There was significant prolongation in the latency and lowering of the amplitude of R 1, R 2 and R′ 2 in the diabetic patients compared with the control group. The abnormality rate of BR increased gradually with the prolongation of diabetic duration. Conclusion BR examination might provide an objective index for nervous damage in diabetic patients and it is helpful in early diagnosis of diabetic neuropathy.