[Objective]To investigate the effect of rabbit BMSCs with fibrin sealant on accelerating early tendon healing.[Methods]The BMSCs were isolated and amplified.The rabbits were divided into experimental(E) and control(C) groups.The injury model was a sharp complete transection through the midsubstance of the achilles tendon.The experimental group was implanted with composite of BMSCs and fibrin sealant,The control group was operated with only fibrin sealant.Specimens were harvested at 1,3,6,and 12 weeks for analysis,which included evaluation of gross morphology,cell tracing,histological assessment,immunohistochemistry studies,morphometric analysis,and mechanical testing.[Results]The gross morphology of the tendons showed the experimental group had lesser adhesion and better reactiveness than that in the control group.The fibrin had degraded at 3 weeks.Cell tracing showed that the labeled bone marrow derived mesenchymal stem cells remained viable and presented in the intratendinous region for at least 6 weeks,becoming more diffuse at later timepoints.At 3 weeks,collagen fibers appeared more organized and there were better morphometric nuclear parameters in the treatment group.At 6 and 12 weeks,there were no differences between the groups with regard to morphometric nuclear parameters.Biomechanical testing showed improved modulus in the treatment group as compared with the control group at 3 weeks,but not at subsequent timepoint.[Conclusion]Intratendinous cell therapy with bone marrow derived mesenchymal stem cells following primary tendon repair can improve histological and biomechanical parameters in the early stage of tendon-healing.

N-acetyltransferase are phase II code proteins with overlapping substrate specifici-DMEs, and two highly similar human NAT gene ty. NAT2 is a polymorphic acetyltransferase gene (designated NAT1 and NAT2) are shown to en- locus and "slow acetylation" in humans is due tonutations in the single coding exon of the NAT2 gene. It was also demonstrated that there exist discrete NAT1 structural variants, and differences in tissue levels of NAT1 among humans are related to specific sequence differences in the NAT1 structural gene. Biochemical studies have shown that NAT1 and NAT2 play an important role in the metabolism of some carcinogens, epidemiological studies have revealed an association between ploy-morphisms of NATs and increased cancer risk.Metabolic phenotypes/genotypes can significantly influence DAN adduct formation and could ultimately lead to alterations in cancer risk. If unequivocal biomarkers of genetic susceptibility to cancer can be developed successfully, then identification of individuals at increased risk would be very helpful in the fields of public health and preventive medicine.

Objective To analyze clinicopathologic characteristics and prognostic factors of the patients with invasive lobular carcinoma of breast. Methods Clinical data of 125 patients with invasive lobular carcinoma of breast treated at Cancer Center of Sun Yat-sen University from Jan. 1990 to Dec. 2008, were analyzed. The clinical characteristics, recurrence and survival of the patients were summarized. Results Median age of 125 patients was 45 years old (range, 27 to 76 years old). The patients with large tumor mass (≥ 3cm), positive local lymph node, more than Ⅱ stage and positive hormone receptor at diagnosis were 77 cases(61.6 %), 64 cases(51.2 %), 101 cases(80.8 %) and 112 cases(89.6 %), respectively. The median time of follow-up was 58 months (range, 11-222 months). Of the 125 patients, 32 had local recurrence and metastasis, and 18 died. The 5-year disease-free and overall survival rates were 82.2 % and 87.3 %, respectively. Multivariate COX regression analysis showed that whether endocrine therapy or not was only a prognostic factor of patients with invasive lobular carcinoma of breast. Conclusion There is no difference in media age of patients with invasive lobular carcinoma of breast at diagnosis from other pathologic type of breast cancer. These patients are usually with larger tumor masses, more lymph node metastasis and a higher proportion of positive hormone receptor. The prognosis of patients is not affected by clinicopathologic parameters.

AIM: To investigate the effect of endotoxin on rat hepatic mitochondria. METHODS: Rats were randomly divided into two groups:endotoxin group and the control. 8 cases of animals were included in each group. The effect of electron leak on the production of endogenous oxygen free radicals and the changes of mitochondria function were studied.RESULTS: Treated with endotoxin, a significant increase in O  2 and the rate of state 3,4 were observed in liver mitochondria; The rate of electron transfer to proton pump of mitochondria respiratory chain complex Ⅱ+Ⅲ( H +/2e -), respiratory control rate and ADP/O decreased significantly. CONCLUSION: A increase in production of endogenous oxygen free radicals induced by endotoxin plays an important role in the injury of rat liver mitochondria.

Objective To identify risk factors for anastomotic leakage,and study the influence of high ligation of the inferior mesenteric artery on anastomotic leakage after rectal cancer resection.Methods The chi-test and the student t test were used for statistics.Clinical data were analyzed for 291 patients who underwent rectal cancer resection between August 2008 and November 2011.Results Anastomotic leakage occurred in 27 (9.3％) patients.Anastomotic leakage significantly increased in patients with tumours located within 10 cm from the anal verge,in male patients,and intraoperative blood loss.The use of high ligation of inferior mesenteric artery,which was associated with lower tumor location and surgical modality,was not a risk factor for anastomotic leakage,though it was associated with tumor stage and postoperative urinary retention.Conclusions Anastomotic leakage after rectal cancer resection is related to the tumor level,male gender,and perioperative bleeding,use of a high tie was not associated with an increased rate of symptomatic anastomotic leakage.

Aim In order to observe the pathological features and the dynamic distribution of RH strain T. gondii in main organs of infected mice, using indirect immunoenzymatic technique. To provide pathological diagonsising reference of toxoplasmosis and increase to understand the pathologensis of Toxoplasmosis. Methods Mice were infected intraperitoneally with 103 tachyzoites of T. gondii RH strain,and the parasites were detected using indirect immunoenzymatic technique in the liver, spleen, lungs and brain at 2,4,6 and 8 days postinfection. Results The liver was the first organ parasitized at D2, followed by spleen and lungs at D4, the brain at D8. At the early phase of infection, parasites were found on the edge of the liver and spleen. A few parasites were detected within the liver, spleen and lungs with time being. But parasites increased progressively and distributed well during the whole phase. The brain was the last organ to be parasitized. Parasites multiplicated rapidly so that the mice were seriously ill and died. Conclusions The indirect immunoenzymatic technique can demonstrate tachyzoites and Toaxoplasma antigen clearly in infected mice during acute stage. Many organs were infected such as liver, spleen,lungs and brain. The results suggest that the organs in the peritoneal cavity were infected directly by tachyzoites as IP infection, then the parasites disseminate through a blood way, and in the end, tachyzoites cross the blood-brain barries to reach the brain.

AIM: To test the effects of FTY720 on mouse intestinal allografts.METHODS: C_3H mice(H-2~k)were used as donor and C57BL/6 mice(H-2~b) as recipients.FTY720 group,allogeneic control group and isogeneic control group were set up.6 and 14 days after transplantation,murine intestinal grafts were harvested for histologic assessment.Lymphocytes were collected from mesenteric lymph nodes(MLN),Peyer's patch(PP),lamina propria lymphocytes(LPL) and intraepithelial lymphocytes(IEL) in the graft,then were analyzed by cytometry.RESULTS: Rejection was inhibited in FTY720 group at the 6th post-transplant day,although not at the 14th day.Recipient CD4~+ and CD8~+ T cells,CD19~+ B cells,as well as ?? TCR lymphocytes,were greatly reduced by FTY720 therapy.The similar action of FTY720 was also revealed in Gr1~+CD11b~+ monocytes.CONCLUSION: FTY720 is efficient on alleviating allo-immune response by reducing the infiltration of both lymphocytes and monocytes into the graft in a mouse intestinal transplantation model.

Autophagy is a lysosome-dependent degradative pathway which is characterized by cytoplasmic vacuolization. However, it is not just a simple degradative pathway. Research shows that autophagy is related to many diseases, such as neurodegenerative disease, malignant tumor, ageing, pathogenic microorganism infection, myocardial ischemia/reperfusion injury and so on. Autophagy exactly exists in myocardial ischemia/reperfusion injury, and it becomes a new research hotspot. This review will focus on the occurrence and development of autophagy and its role, signal transduction and research status in myocardial ischemia/reperfusion injury.

AIM　To investigated the effect and mechanism of Houttuynium (HOU) on splenectomy animals. METHODS　The models of splenectomy mice and splenectomy rats were made and delayed type hypersensitivity (DTH) reaction, ANAE (+) cell percentage of peripheral blood lymphocytes, Con A-induced thymus and groin lymph node lymphocyte proliferation, the amount of lymphocytes of groin lymph node,and T cell subpopulation in peripheral blood were measured. RESULTS　HOU ig (60 mg*kg-1, 120 mg*kg-1) can strikingly enhanced delayed type hypersensitivity (DTH) reaction, ANAE(+) cell percentage of peripheral blood lymphocytes. strengthened Con A-induced groin lymph node lymphocyte proliferation, raised the amount of lymphocytes of groin lymph node in splenectomy mice. But the effects of them on Con A-induced thymus lymphocyte proliferation were not apparent. HOU ig (40 mg*kg-1, 80 mg*kg-1) improved Th subset, reduced Ts subset, and then modulated the rate of Th/Ts in splenectomy rats. CONCLUSION　HOU strengthened the cellar immune function of splenectomy animals by promoting the compensating capability of lymph node and regulating T cell subpopulation.

Objective To evaluate the gene therapeutic effects of guinea pigs model with immune -mediated inner ear disease(IMIED)after locally injection of bone -marrow mesenchymal stem cells(BMSCs) decorated by in-terleukin-4 gene .Methods Guinea pigs were immunized with keyhole limpet hemocyanin (KLH) and caused 55 animal models ,divided into five groups ,each group with 11 animals :groupA(BMSCs carrier) ,group B(BMSCs emp-ty -carrier control group) ,group C(recombinent lentivirus IL -4 gene) ,group D(lentivirus empty -carrier control group) ,group E(simulation operation control group) .Groups were all injected with the corresponding suspension (20 μl)[includs BMSCs ceas of (1 .5~2 .0) × 106 ,the concentration of (entivirus) is 0 .5 × 108 pfu] by the scala tympani window into the inner ear .The fluorography immunohistochemistry test and enzyme immunohistochemistry test for the situation of IL -4 gene express and productive protein distribution in inner ear .Auditory functions and the KLH level of guinea pigs blood were monitored respectively by auditory brainstem responses (ABRs) and ELISA test .Results The threshold of ABR wave Ⅲ decreased in group A ,group B and group C .The result were more significant in group A and group B than that in group C ,but results in group A was more prominent (P<0 .05) . The results of immunohistochemistry test showed that fluorescence positive BMSCs mainly scattered in scala tymani and scala vestibule .The microscope results showed that for the group A ,B and C ,there were only few foccule and red and white blood cells in scala tympani floc ,but for group D and group E ,with different levels of labyrinthine hy-drops and some mononuclear cells around the spiral ganglion and small blood vessels .Conclusion Restructuring lentiviral vector with IL -4 gene can be successfully transfected into BMSCs in vitro ,compared to inplangting into inner ear in scala tympani approach ,the cells can migrate and generate gene product of IL -4 ,to significantly im-prove the auditory functions and inflammatory reaction of inner ear disease ,and BMSCs can be used as a carrier to migrate to the damaged part with therapeutic gene .