Objective To investigate the immune privilege of cotransplanted parathyroid cells induced by testicular Sertoli cells expressing Fas ligand (FasL).Methods Different testicular Sertoli cells and allogeneic parathyroid cells were cotransplanted respectively. Allografts survival,cells component and the apoptosis of infiltrative lymphocytes in vitro were analyzed.Results The parathyroid cells transplanted alone were all rejected with the mean survival time of ( 17.22 ? 3.63 ) days. When parathyroid cells were cotransplanted with testicular Sertoli cells,survival time of allografts was prolonged. When the quantity of testicular cells was increased to 4?10 6,most animals remained normal serum calcium and PTH throughout the follow-up period ( P

Objective To investigate the effect of Fas ligant (FasL) expression of testicular Sertoli cells on cotransplanted parathyroid cells. Methods Various numbers of rat testicular Sertoli cells with FasL expression and allogeneic parathyroid cells were cotransplanted. Allograft survival, change in cell components, apoptosis of infiltrative lymphocytes and parathyroid function were analyzed. Results The parathyroid cells when transplanted alone were all rejected, the mean survival time of allografts was (17?4)days. When parathyroid cells were cotransplanted with testicular Sertoli cells, the survival time of allografts was prolonged over 60 days. When the quantity of testicular cells was increased to 4?10~6, 6 of 8 rats maintained normal serum calcium and PTH levels throughout the follow-up period of 60 days (P

0.05). However, statistically significant changes of those data were found perioperatively in parathyroid gland excision group (P

OBJECTIVE:To explore the effects and safety of atorvastatin combined with probucol on the vascular elasticity in patienits with hypertension. METHODS:246 hypertensive patients were randomly divided into control group and observation group,123 cases in each group. All patients received conventional antigypertensive treatment,based on it,control group was given 10 mg Atorvastatin tablet,qd;observation group was additionally given 0.25 g Probucol tablet,qd,on the basis of control group. They were treated for 1 year. Clinical efficacy,lipid levels(total cholesterol,triglyceride,low density lipoprotein cholesterol,high density lipoprotein cholesterol),cystatin C (Cys-C),C-reactive protein (CRP),elastic parameters of common carotid artery and lower limb artery(stiffness,pressure-strain elastic modulus,compliance,augmentation index,pulse wave velocity)before and af-ter treatment in 2 groups were observed,and the incidence of adverse reactions was compared. RESULTS:Before treatment,there were no significant differences in lipid levels,Cys-C,CRP and elastic parameters of common carotid artery and lower between 2 groups (P>0.05);after treatment,the above-mentioned indexes were significantly improved,and the improvement degree in ob-servation group was superior to control group,the differences were statistically significant(P<0.05). And there were no severe ad-verse reactions during treatment in both 2 groups. CONCLUSIONS:Atorvastatin combined with probucol can improve lipid level and elasticity of common carotid artery and lower limb artery,with good safety.

A total of 60 ankylosing spondylitis patients scheduled for elective surgery with anticipated difficult airway were enrolled and randomly assigned into either dexmedetomidine (D) or midazolam plus sufentanil (MF) group.Group D:topical nasal anesthesia and a loading dose of dexmedetomidine at 1.0 μg/kg in 10 min; group MF:intravenous infusion of 0.05 mg/kg midazolam plus 3 μg/kg sufentanil.Fiberoptic bronchoscopic (FOB)-assisted awake nasotracheal intubation was performed.Mean arterial pressure (MAP),heart rate (HR),Pulse oxygen saturation (SpO2),Ramsay score and success rate of intubation were recorded and compared between two groups.The intubation conditions and level of comfort were also evaluated.MAP and HR of group D at FOB through postnaris (T1),peep the epiglottis(T2),intubation success immediately(T3)and 1 min after intubation(T4) were significantly lower (P ＜ 0.05 or P ＜ 0.01) than those of group MF while Ramsay sedation scores were obviously higher (P ＜ 0.05) than those of group MF.Group D with endotracheal intubation comfort level 5 score of grade 1-2 were 8 and 14 cases and were significantly higher than 4 and 10 cases of group MF.Immediately after intubation,level 3 scores in grade 1 of group D (n =21) were significantly higher than group MF (n =12) ; initial success rate of intubation in group D was obviously higher than that in group MF (70％,n =21 vs.47％,n =14).And the incidence of unpleasant intubation memory in group D was lower than that in group MF (37％,n =11 vs.67％,n =20).Fiberoptic bronchoscopic-assisted nasotracheal intubation offers better conditions for intubation and reduces the incidence rate of intraoperative awareness.

AIM: To investigate the effect of IL-4, CD40L on RANTES production in murine renal tubular epithelial cells (TEC). METHODS: TEC were obtained from mouse, expression of RANTES and CD40 on TEC were measured. RESULTS: (1) Activation of TEC with IL-4 resulted in significant increase in CD40 expression (P

Objective To investigate the risk factors of cerebral palsy in newborns with periventricular leukomalacia(PVL).Methods Sixty-one infants with sequela of cerebral palsy among 806 neonates born at the Second People'S Hospital of Liaocheng,Shandong,China,during December 2000 to November 2005 were studied for its etiology.Diagnosis of cerebral palsy in 26 of the 61 infants was established by type B ultrasonic scanning or magnetic resonance imaging(MRI)for the head at least twice and excluded of other diseases.Thirty-five infants without PVL hospitalized at the same hospital were enrolled as control group during the same period.Logistic regression analysis was performed for the risk factors of PVL. Results Twenty-six infants were diagnosed as PVL.accounting for 42.6％of those with cerebral palsy.Main high-risk factors of PVL included severe asphyxia(x3),low gestational age(x1),intraventricular hemorrhage(x14)and low blood pressure(x8),with odds ratios of 2.843,3.575,3.268 and 1.947,respectively,and a fitted regression model as logistic(P)=β0+0.7952 x3-1.428x1-1.328 x14+0.8256x8.Pregnant hypertension,neonate respiratory distress syndrome(NRDS),and intrauterine infection could also affect occurrence of PVL,all with statistical significance(P＜0.05).Conclusion PVL is one of main causes of cerebral palsy,with severe asphyxia,low gestational age,intraventricular hemorrhage and low blood pressure as main high-risk factors.

Objective Delayed xenograft rejection (DXR) is a major barrier to the long-term xenograft survial.This study evaluated the interaction between human peripheral blood mononuelear cells (PBMC) and porcine endothelial cells (PEC),and the effects of new generation of rabbit antihuman leukocyte polyclonal antibody (newRALG) inhibiting xenogeneic cell-mediated immune responses.Methods newRALG was obtained from rabbits after immunization with activated lymphocytes and monoeytes.PEC were isolated from aorta,and human PBMC were isolated from peripheral blood.Co-cultures of PKH-26 labeled PEC with PBMC were established,newRALG,thymoglobulin,isotype Ig and scavenger receptor (SR) ligand poly G were added into the co-cultures.Cells were collected,then FACS analysis was carried out to detect the up-take of PEC membrane by monocytes and the expression of costimulatory molecules.Lymphocyte proliferative responses to PEC with or without antibody were evaluated by a xenogeneie mixed lymphocyte-endothelial cell reaction (xMLER).Results FACS analysis revealed that monocytes from PBMC-PEC co-cultures became positive for PKH-26 following their interaction with PKH-26 labeled PEC,indicating that they engulfed PEC membranes during activation.PKH-26 positive monocytes up-regulated the CD40 and CD80 expression.Furthermore,SR blockade with poly-G prevented PEC membrane up-take by monocytes,newRALG greatly reduced SR-mediated PEC membrane up-take.The effects of thymoglobulin in inhibiting PEC membrane uptake were limited.xMLER demonstrated strong lymphocyte proliferation in response to PEC,and lymphocyte proliferation was dramatically inhibited by newRALG but not isotype Ig at a dosmdependent manner.Conclusions Monocytes play an important role in xenogeneic immune responses.SR ligand poly G inhibits PEC membrane up-take.newRALG inhibits PEC membrane up-take by monocytes,suggesting that newRALG blocks SR.Additionally,newRALG inhibits lymphocyte proliferation in response to PEC.These results suggest that this new polyclonal preparation may thus impair the initiation of xeno-specific immune responses and prevent xenograft rejection.

Objective To observe the influence of simulated microgravity on rat islet. Methods Isolated islet were assigned to flask-culture or bioreactor-culture. Gross structure and ultrastructure of islet were observed by transmission electron microscopy (TEM) and scanning electron microscopy (SEM). Results Islets ultrastructure on 7th day in bioreactor closely resembled fresh islets,with well-formed secretory granules and abundant mitochondria. SEM showed under microgravity islets communicating each other with cavity-like areas. Conclusions The ultrastructure of islets cultured under microgravity closely resembled fresh islets.

Objective To investigate the association between the genetic polymorphisms of methylenetetrahydrofolate reductase (MTHFR) and ulcerative colitis (UC) of Han ethnic population in Zhejiang, China. Methods Two hundred and seventy-four consecutive patients with UC and 726 healthy controls (HC) were studied. The genetic polymorphisms of MTHFR (C677T and A1298C) were genotyped using PCR-RELP methods. Results The frequencies of variant allele and genotype in MTHFR A1298Cgene were higher in UC patients than in the HC (35.77% vs 29. 96%, P =0. 013; 52. 19% vs 44. 90%,P=0.039; respectively). However, there were no significant discrepancies of the allele and genotype frequencies in the MTHFR C677T gene between the UC patients and the HC (P ＞ 0. 05 ). In addition, the MTHFR 677Tr homozygote, T allele and 677CT/1298AC compound genotype were more prevalent in patients with extensive colitis than in those with distal colitis (37. 66% vs 14. 72% ,P = 0. 0002; 49. 35% vs 32.99% ,P =0. 0004; 29. 87% vs 15.23% ,P =0. 006; respectively). Furthermore,the variant allele in the MTHFR A1298C gene (C) in severe UC patients was significantly lower than in mild and moderate UC patients (18.97% vs 33. 88% ,P =0. 022). Conclusion The genetic polymorphisms of MTHFR C677T and A1298C are obviously associated with Han ethnic population with UC in Zhejiang province.