In guinea pig to rat cardiac xenotransplantation model,plasmapheresis,splenectomy and cyclophosphamide were used to reduce the content of the plasmatic natural antibodies.The survival time of the grafts was observed.It was found that plasmapheresis could lead to a dramatic drop of the natural antibodies in the plasma.Plasma IgM and IgG was significantly reduced to 167 mg/dl and 693.3mg/dl after plasmapheresis from 936.0mg/dl and 2 424.3mg/dl before plasmapheresis.Survival time of the control group was 13.2 min,while survival time of the plasmapheresis group was 537.0 min.The combined use of plasmapheresis,splenectomy and cyclophos-phamide could further prolong the survival time of the xenografts(760.0min).

MicroRNA(miRNA)is a kind of 22 nt endogenous small non-coding single strand RNA and is universally present in animals and plants.It can suppress the expression of target genes at post-transcription al level by complementary biding to the 3'UTR of target mRNAs.Recent studies indicate that microRNA is closely associated with tumorigenesis,differentiation,metastasis and relapse.MicroRNA might act as a new biomarker of tumor diagnosis and a new target of tumor gene therapy.

Objective To observe the effects of intrathymic islet transplantation or renal subcapsule islet transplantation on the graft survival.Methods C57BL/6 mice were used as recipients and BALB/c as donors The recipients receiving intrathymic or renal subcapsule islet transplantation were divided into simple transplantation groups and the group intraperitoneally receiving rabbit antithymocyte serum(ATS) at the time of islet transplantation.Results The median survival time (MST) of simple intrathymic allografts were 19.5 days,longer than that of allografts implanted beneath the renal capsule.Administration of ATS at the time of islet transplantation delayed rejection of islets transplanted to the renal subcapsute(MST,43.0 days),and intrathymic allografts were superior(MST,93.8 days).Six of 8 intrathymic grafts with administration of ATS survived permanently.especially a state of donor-specific unresponsiveness was induced.Conclusion The thymus may be an immunoprivileged site for islet transplantation and may play an important role during the induction of immune tolerance.

Objective　To study the effect of the combined use of aminoguanidine (AG) and cyclosporine A (CsA) on acute rejection following cardiac allograft. Methods　Except the control group, all other three groups were respectively treated by AG 600mg/kg every day subcutaneously 0 to 7 days after transplantation, low-dose CsA 2mg/kg every day i.m 0 to 7 days after transplantation, and low-dose CsA plus AG. Inducible nitric oxide synthase (iNOS) expression and nitric oxide (NO) production during acute allograft rejection were detected at 4th day after operation, and the graft survival was observed.Results　Compared with the control group, iNOS expression and NO production were significantly inhibited in the AG-treated group (P＜0.05)，the progression of acute rejection was slightly attenuated and allografted heart survival prolonged. The inhibitory effects of iNOS activity and NO production in the recipients receiving the combined treatment of low-dose CsA plus AG were higher than those receiving low-dose CsA alone. Compared with the low-dose CsA group, low-dose CsA plus AG could significantly reduce the histologic grade of acute rejection (P＜0.01) and prolong the graft survival (P＜0.05). Conclusion　The combined use of low-dose CsA and AG could synergistically suppress iNOS activity and NO production, and significantly prolong allografted heart survival.

Objective To investigate the effect of clinical pathway in health education for preventing post partum urinary retention. Methods 883 women who performed vaginal delivery in our department before implementation of clinical pathway from July to December, 2007 were set as the control group, 1172 women who performed vaginal delivery after implementation of clinical pathway were selected as the experimental group from January to June, 2008. Then the first micturition condition was compared between the two groups. Results The rate of autonomic micturition was 95.9% in the experimental group, and 91.6% in the control group, The rate of autonomic micturition was higher than that of the control group. Conclusions Application of clinical pathway to prevent post partmn urinary retention can improve obstetrical nursing quality.

Objective To evaluate a reliable and noninvasive method for the diagnosis of acute rejection after liver transplantation.Methods The allogeneic, syngeneic and immunosuppresive models of orthotopic rat liver transplantation were established, and acute rejection was graded according to histopathological change. Bile was sent for cytology by microscopy,and the sequential detection of bile IL 2,IFN ?,IL 4 and IL 6 gene expression was performed at day 1 through day 7. Results The number of cells in bile was persistently high in allogeneic group,and blast and lymphocytes appeared in bile. IL 2 and IFN ? were detected only in allogeneic group,with a specificity of 70% and 67%(7/10 and 8/12),and a sensitivity of 39% and 44%(7/18 and 8/18)respectively.Conclusion Bile cytology and detection of IL 2 and IFN ?mRNA transcript are useful adjuvant diagnosic methods for acute rejection after liver transplantation.

Objectives To investigate the effects of orthotopic liver transplantation (OLT) plus non-biologic artificial liver support system (NBALSS) on fulminant liver failure(FLF), and efficiency of NBALSS on the preoperative preparation of OLT. Methods Seven FLF patients received OLT after 2 to 20 sessions of NBALSS therapy while waiting donor liver.Results Decreased serum bilirubin, improved hepatic encephalopathy and ascites was achieved in all 7 cases after NBALSS. Five of 7 patients have survived for 3 to 20 months after OLT, of whom 3 have had excellent quality of life for more than 18 months. Two patients died of hepatorenal syndrome or of hepatorenal syndrome and serious pancreatitis. Conclusions OLT plus NBALSS is one of the most effective therapies for FLF, NBALSS can be used to tide the FLF patients over until a donor liver is available.

Hepatic ischemia/reperfusion injury (HIRI) exists in lots of process of clinical pathology and operation. Apoptosis is an active process controlled by some gene and factors such as Fas/FasL, Caspases and Bcl-2 families. More and more studies suggest that HIRI is associated with apoptosis. This article summarized the mechanisms and gene modulation of apoptosis during HIRI and the significance of suppressing apoptosis in preventing HIRI.

Objective To observe the clinical efficacy of deep needling at Tianshu (ST 25) and Fujie (SP 14) plus electroacupuncture in treating severe functional constipation (FC).Method Sixty-three patients with severe FC were randomized into a treatment group of 33 cases and a control group of 30 cases. The treatment group was intervened by deep needling at Tianshu (ST 25) and Fujie (SP 14) plus electroacupuncture, while the control group was by sham electroacupuncture. The Complete Spontaneous Bowel Movement (CSBM), Bristol Stool Scale (BSS), and Patient Assessment of Constipation Quality of Life (PAC-QOL) were evaluated before and after intervention.Result In the treatment group, the CSBM after 2-week, 4-week, and 8-week treatments and CSBM of the 4-week and 12-week follow-up study were significantly different from that before intervention (P<0.05). In the control group, the CSBM after 8-week treatments was significantly different from that before intervention (P<0.05). The CSBM after 2-week, 4-week, and 8-week treatments and CSBM of the 4-week and 12-week follow-up study in the treatment group were significantly different from that in the control group (P<0.05). The BSS scores were significantly changed after 2-week, 4-week, and 8-week treatments in both groups compared to that before intervention (P<0.01,P<0.05). The BSS scores after 2-week, 4-week, and 8-week treatments in the treatment group were significantly different from that in the control group (P<0.01,P<0.05). The item scores of PAC-QOL (physical discomfort, psychosocial discomfort, worries and concerns, and satisfaction scores and global score) were significantly changed after intervention in the treatment group (P<0.05). The item scores of PAC-QOLA including physical discomfort, worries and concerns, and satisfaction and global score were significantly changed after intervention in the control group (P<0.05). After intervention, the PAC-QOL scores of the treatment group were significant different from that of the control group (P<0.05).Conclusion Deep needling at Tianshu (ST 25) and Fujie (SP 14) plus electroacupuncture is an effective method in treating severe FC.

Objective To investigate the exercise self-regulatory efficacy and its influencing factors of chronic obstructive pulmonary disease(COPD) patients with acute exacerbation. Methods A total of 126 patients with acute exacerbation of COPD were selected by convenient sampling method and investigated with a demographic questionnaire, EXercise Self-Regulatory Efficacy Scale and Social Support Rating Scale. Results The mean score of exercise self-regulatory efficacy was (79.97 ± 19.78) points at medium level. Multiple-factor analysis showed that availability of social support, other diseases, age and dyssomnia were influencing factors of exercise self-regulatory efficacy of COPD patients with acute exacerbation(t=-3.082-5.351, P<0.01 or 0.05). Conclusions The level of exercise self-regulatory efficacy of COPD patients with acute exacerbation need to be improved, and we should pay more attention to the social support system and the control of other diseases.