Objective To study the possible pathogenesis of TNBS (2,4,6-trinitrobenzenesulfonic acid)-induced inflammatory bowel disease (IBD) in a mouse model by analyzing histological changes in colon and the expression of cytokines and transcription factor RORγt related to T cell subsets in mesenteric lymph nodes.Methods Female BALB/c mice aged 6-8 weeks were randomly grouped into two groups: IBD model and normal control groups.The mouse model of IBD was established by treating mice with 200 μl of 5％ TNBS/50％ ethanol solution (1∶1) through intestinal instillation, while the mice in the normal control group were instilled with PBS.Pathological changes in colon samples of mice were observed.Real-time PCR was performed to detect the dynamic expression of Th1 cytokines (IL-2, IFN-γ and IL-12p40), Th2 cytokine (IL-4), Treg-related cytokine (IL-10), Th17 cell-related cytokines (IL-17, IL-21 and IL-23) and transcription factor RORγt in mesenteric lymph nodes.Results The mice in the model group begun to show abnormal vital signs such as diarrhea, loss of weight and reduced activity, and mild hyperemia of intestinal mucosa and edema from the third day after modeling.Slight lesions were observed in histological slices of colon tissues stained with hematoxylin and eosin (HE).The expression of IL-21, IL-23 and IL-17 at mRNA level were significantly increased, while the expression of other cytokines showed no significant change.On the sixth day after modeling, many pathological symptoms and intestinal mucosal lesions were aggravated, and marked infiltration of inflammatory cells was observed in histological slices of colon tissues, which indicated that the IBD model was successfully induced by TNBS.Compared with the control group, the IBD model group showed significantly enhanced expression of IL-2, IL-12p40 and IL-10 in mesenteric lymph nodes at mRNA level on the sixth day after modeling.Although the expression of IL-21, IL-23, IL-17 and RORγt at mRNA level on the sixth day were down-regulated to different extent as compared with those on the third day, they were still significantly higher than those of the control group.Conclusion Th17 cell-related cytokines play an important role in the early stage of TNBS-induced IBD.With the progression of the disease, both Th1 and Th17 cells are involved in the immunopathological injury of colon tissues.

Objective To investigate the therapeutic effects of Astragalus & Angelica (A&A) , the mixture of Chinese herbs, on different vasoconstrictors and vasodilators in the process of renal interstitial fibrosis in rats with unilateral ureteral obstruction (UUO). Methods Wistar rats were randomly divided into Sham,UUO and UAA (UUO+A&A) groups. After administration of A&A (14 g?kg-1?d-1) for 0, 3, 7 and 10 days, the levels of Ang-II , ET-1, nitric oxide(NO) and the activities of different NOS in renal homogenate were measured by RIA or enzyme method. The expression levels of eNOS, nNOS, iNOS were detected in the kidney by immunohistochemistry and semi-quantitively assessed by Western blot. Results After A&A administration, the levels of Ang- II and ET-1 were increased in UUO at all time points (P

Aim The mixture of Chinese herbs,Astragalus & Angelica(A&A) has been found that has antifibrotic effect in rats.Methods To elucidate themechanisms underlying the renoprotective effects of A&A in the process of renal interstitial fibrosis,we investigated the pathology changes of kidneys in unilateral ureteral obstruction(UUO) rats.In the study,Wistar rats were randomly divided into CON,Sham,UUO and UUA(UUO+A&A) groups.After administration of A&A(12 g?kg?d~(-1)) for 0,3,7 and 10 d,renal damage including interstitial cell infiltration,tubular atrophy and interstitial fibrosis were quantified on HE and Masson stained tissue sections.The expression of ?-smooth muscle actin(?-SMA),transforming growth factor-?_1(TGF-?_1) and fibronectin(FN) was measured using computer image analysis of immunohistochemistry staining sections,ELISA and Western Blot.Results Renal damage and the expression of ?-SMA,TGF-?_1 and FN were all significantly exacerbated in UUO group compared with those of Sham group(P

[Objective]To analyze the biodegradation properties and active osteogenesis features of implanted composites of gelatin microspheres(GMs) impregnated with calcium phosphate cement(CPC) and recombinant human bone morphogenetic protein-2(rhBMP-2) in bone defect.[Method]rhBMP-2 loaded gelatin microspheres was incorporated in rhBMP-2/CPC during setting.Thirty rabbits were divided into groups A,B and C(10 each).The rhBMP-2/GMs /CPC,GMs/cpc and rhBMP-2/cpc was implanted into the rabbits of group A,B and C,respectively.The biodegradation properties and active osteogenesis features of implanted composites bone substitute was evaluated by radiography,histology,bone mineral density(BMD)after the composites were implanted into the bone defects at rabbit radius for 6,12 weeks respectively.[Result]Significant implant resorption and bone ingrowth were observed in all rhBMP-2/GM/CPC treated defects while the defects treated with rhBMP-2/CPC implants showed slight resorption of CPC and the defects treated with GM/CPC implants showed slight formation of new bone.[Conclusion]The result of this study suggested that the rhBMP-2/GMs/CPC composite could be used as material for bone graft substitute.

Objective:To explore whether Chinese herbs Astragalus and Angelica mixture(A&A) have renoprotective effects on chronic renal failure in rats.Methods:5/6 nephrectomized kidney in rats was used as chronic renal failure model.Rats were randomly divided into four groups which included sham,Model,A&A and enalapril(Ena) groups.The remnant kidney was harvested after 2,4,8,12 weeks,and levels of serum creatinine(scr),urea and urinary protein excretion were measured using routine biochemical methods.The pathological lesions were observed by light microscope.The expressions of fibronectin(FN) and collagen Ⅳ(Col-Ⅳ) in glomeruli and interstitium were detected by immnuohistochemistry.Results:5/6 nephrectomized rats were presented with the characteristics of increasing scr and urea,persistent proteinuria at the end of the 2nd,4th,8th,12th weeks,respectively.They had increasing size of glomeruli with progressive proliferation of mesangial cells and mesangial matrix followed by glomerulosclerosis and progressive elevated expressions of FN and Col-Ⅳ.Compared with Model group,the administration of A&A could decrease urinary protein excretion for 34%,44%,25%,45% at the end of the 2nd,4th,8th and 12th weeks,respectively(P

Objective To investigate effects of pedicle processing methods on the survival and appearance of the pedicle flaps. Methods The study involved 17 patients with soft tissue defects of extremities treated with the “exclamation mark” shaped pedicle flaps from October 2009 to January 2011.The traditional pedicled rotation flaps was designed to be a tennis racket-like shape,then the rotational pedicle was designed to small round tension reduction flap and pedicled rotation flaps,which contributed to formation of the “exclamation mark” shaped pedicle flaps.The soft tissue defects was located at the upper extremity in three patients and at lower extremity in 14,with defect areas of 4.0 cm× 7.2 cm-5.8 cm × 14.0 cm.There used two superficial radial nerve vasotrophic flaps,one ulnar artery supra-carpal cutaneous flap,eight sural neurocutaneous vasotrophic flaps and six saphenous nerve vasotrophic flaps.Results All flaps survived at Ⅰ stage except that one flap had partial distal necrosis postoperatively,which was cured after dress change.The follow-up ranged from six months to one year,which showed unobvious swelling of the survived flaps and good appearance of the rotation point of the pedicle. Conclusion The “ex(c)lamation mark” shaped pedicle flaps can reduce entrapment of the distal pedicle,promote venous drainage,improve survival and modify the appearance of the flaps.

Objective To observe the effect of Shoutaiwan on the expression ofα-enolase in the decidua tissue of recurrent abortion mice. Methods The abortion-prone CBA/J × DBA/2 matings were established as the model of recurrent abortion and the nonabortion-prone CBA/J×BALB/C matings were used as the model of normal pregnancy. The model of recurrent abortion CBA/J × DBA/2 of pregnant mice were randomly divided into model group and Shoutaiwan high-, medium-, low-dose groups, pregnant mice of every group were orally administrated in different doses. On the 14th day of pregnancy, the mice were killed. The expression ofα-enolase was detected by using immunohistochemical method and Western Blot. Results α-enolase expression in the model group was significantly higher than the normal pregnancy group (P<0.01). Compared with the model group, Shoutaiwan low-, medium- and high-dose group significantly decreasedα-enolase expression of pregnant mice (P <0.01). Compared with high-dose group, Shoutaiwan medium-and low-dose group showed no significant difference (P>0.05). Conclusion Shoutaiwan could down-regulate the expression ofα-enolase in the decidua tissues of recurrent abortion mice, which may be one of its mechanisms of preventing miscarriage.

Objective To explore the influence of ulinastatin combined with thymic peptide?1on the polarization of T helper(Th) cells,and the immunoregulatory effects on septic patients.Methods Clinical data of 60septic patients admitted to intensive care unit (ICU)of Guangzhou General Hospital of Guangzhou Command from Jun.2006to Oct.2007were collected and randomly divided into treatment group(n=30)and control group(n=30).The control group received classic SSC treatment,while the treatment group was given classical SSC treatment plus ulinastatin and thymic peptide?1.The control group was divided again into death subgroup and survival subgroup according to the living state on day 28.Peripheral blood samples were collected at day 1(before administration)and day 10. CD4+ T cell subset was detected by flow cytometry,and the levels of IFN-?(T helper type-1cytokine)and IL-4(T helper type-2 cytokine)were evaluated semi-quantitatively.Ten healthy volunteers were chosen in the meantime as healthy controls.Results The positive rates of IFN-?and IL-4of CD4+ T cells declined significantly at day 10in treatment group compared with those in control group and before treatment(P0.05).The IFN-?positive rate presented a low level and showed a downward trend after treatment in survival subgroup,while presented a high level and also showed a downward trend after treatment in death subgroup.The IL-4positive rate showed a downward trend in survival subgroup and upward trend in death subgroup.Conclusion Ulinastatin combined with thymic peptide?1may improve the proportion imbalance of IFN-?and IL-4of septic patients,and regulate the immune status.

Objective To investigate the effect of high pressure distention on the expression of stenosis-related genes of saphenous vein graft(SVG) during the coronary artery bypass grafting(CABG).Methods The biopsy specimens of saphenous vein collected from 10 patients who have undergone CABG,were divided into expansion group and no-expansion group.Real-time PCR and immunohistochemical staining were performed for examination of mRNA and protein expression of VE-cad,Egr-1,VCAN respectively.Student's t and Chi-square test were used to do statistic analysis.Results The results of RT-PCR showed that the mRNA transcription of Egr-1,VCAN in the expansion group were statistically significantly higher than those in no-expansion group(P<0.05).The mRNA transcription VE-cad in expansion group was statistically significantly lower than that in the no-expansion group(P<0.05).The immunohistochemical staining results showed that the expression of Egr-1 and VCAN in expansion group were significantly stronger than those in no-expansion group,while the expression of VE-cad was significantly lower than no-expansion group.Conclusion The intraoperative expansion of SVG can increase the expression of stenosis-related genes Egr-1 and Versican,and decrease the expression of stenosis-related gene VE-cad,which may be related with the SVG stenosis after CABG.

Objective:To investigate the changes and significances of serum cystatin C and transforming growth factor-β1 levels for the neonatal asphyxia.Methods:Forty-six asphyxia newborns were chosen as the asphyxia group,and thirty healthy newborns were selected as the control group.The TGF-β1,CysC,BUN,Scr,and GFR levels of both groups were detected on the 1st,3rd,7th day after hospitalization.According to the renal injury,the 46 newborns were divided into normal group and asphyxia group,and the serum indexes were detected and analyzed.Results:On the 1st,3rd,7th day after hospitalization,the TGF-β1,GFR of asphyxia group was obviously increased and was lower than those of the control group (P＜0.05);the level of CysC,BUN,Scr in both groups were decreased,and the change degree in asphyxia group were higher than that of the control group (P＜0.05);the CysC,BUN,Scr in renal injured group were higher than those of normal group,and TGF-β1,GFR were much lower (P＜0.05).Additionally,TGF-β1 level of renal injured group was negatively correlated to the BUN and Scr,and positively correlated with the GFR (P＜0.05).The level of serum CysC in renal injured group was positively correlated to BUN and Scr and negatively correlated to GFR (P＜0.05).Conclusion:The serum TGF-β1,CysC in asphyxia newborns had significant changes compared with the healthy newborns and was correlated to the renal injured indexes,which had clinical directive significance on the early diagnosis,condition judgment,and prognosis of neonatal asphyxia with renal injury.