Humans ; Root Resorption

Objective To observe the effects of grape seed proanthocyanidin extract(GSPE) plus atorvastatin treatment on matrix metalloproteinase-9 ( MMP-9) in experimental atherosclerosis rabbits and to explore its mechanism. Methods Thirty male New Zealand rabbits were randomized into five groups. The normal control group were fed with standard diet for 24 weeks. And the other groups were fed with standard diet containing 1 % cholesterol for 12 weeks. In the sequential 12 weeks, the model control group was fed with standard diet. The GSPE group was fed with standard diet containing 1% grape seed proanthocyanidin(GSP). The atorvastatin group was fed with standard diet containing atorvastatin(2. 5 mg · kg~(-1) · d~(-1)). The GSPE plus atorvastatin group was fed with standard diet containing 1% GSP and atorvastatin (2. 5 mg~(-1) · kg~(-1) · d~(-1)). Blood samples were drawn from ear middle arteries of rabbits just before the experiment and at the 12th and the 24th weekend of the experiment. All the rabbits were fasted for at least eight hours before the blood was drawn. The blood samples were analyzed for the matrix metalloproteinase-9 (MMP-9). All the rabbits were sacrificed at the 24th weekend, and the expression of MMP-9 was observed in the thoracic aortic tissue using immunohistochemistry technique. Results The serum level and aorta expression of MMP-9 were increased in model group compared to control group (all P< 0. 05). The severity of atherosclerosis was less in three drug groups than that in model control group. The GSPE,atorvastatin and GSPE plus atorvastatin groups versus model group showed less atherosclerotic lession, the decreased expression of aorta MMP-9 and the decreased serum level of MMP-9 C(1. 06±0. 21), ( 1. 07 ±0.20), (0.81 + 0.16) vs. (1. 32±0. 24)ng/ml,all P<0. 05]. The effect in the GSPE and atorvastatin group was most obvious. Conclusions GSPE plus atorvastatin group has the most efficacy of anti-atherogenesis, which is associated with its reducing the expression of matrix metalloproteinase.

Objective: To evaluate the quality consistency of the original product ( DIOVAN ) and generic valsartan capsules ( VSC) . Methods:The dissolution of the two capsules in four media was monitored by the UV method described in Chinese Pharmaco-poeia ( ChP 2010 edition) . The f2 similarity factor approach was used to evaluate the dissolution similarity between DIOVAN and VSC and the production quality of the enterprises. Meanwhile, the homogeneity in the same batch was studied by dissolution precision and the reproducibility in the different batches were also evaluated by a similar equivalent limit method to show the production quality of the manufacturers. Results:The dissolution of VSC and Diovan in pH 6. 8 phosphate buffer medium was both above 85% in 15 min. The f2 similarity factors in the other three media ( water, pH 4. 5 acetate buffer and 0. 1 mol·L-1 HCl) were all above 50. The relative standard deviation ( RSD) of precision in the same batch was less than 10%. Among the different batches, dissolution limit value ( Q) was within the range of the upper and lower limit value of probability levels (δ) . Conclusion:The f2 similarity factor results indicate the in vitro dissolution of the reference drug ( DIOVAN) and generic drug ( VSC) is consistent in the four media. The production quali-ty of generic manufacturer is also good with promising homogeneity and reproducibility evaluation results.

Ranibizumab is a recombinant rat monoclonal antibody fragment of the second generation humanized VEGF. Ranibi-zumab can bind all of active VEGF-A to inhibit the bond between VEGF-A and VEGFR1 or VEGFR2. As the results, the vascular en-dothelial proliferation and vascular permeability can be reduced, and the new vessels angiogenesis can be prevented. The article sys-tematically searched and summarized the relative literatures to offer high-quality evidences for the recent clinical application of ranibi-zumab in ophthalmology.

Objective To observe the subfoveal choroidal thickness (SFCT) and choriocapillary blood flow area (CBFA) in the patients with idiopathic macular hole (IMH).Methods This is a prospective clinical study.Thirty-two patients with unilateral IMH (4 in stage 2,17 in stage 3,11 in stage 4) and 32 age-and sexmatched normal controls were enrolled in this study.All eyes were divided into three groups,including group A (32 affected eyes),group B (32 fellow eyes) and group C (32 normal eyes of controls).There was no significant difference in age (t=0.865) and gender (x2=0.000) in IMH patients versus normal control subjects (P＞0.05).There was no significant difference in refraction (F=0.957) and ocular axial length (F=0.562) between group A,B and C.The SFCT was detected by enhanced depth imaging of spectral-domain optical coherence tomography (OCT).The CBFA was detected by OCT angiography.The differences of SFCT and CBFA in three groups were analyzed by Kruskal-Wallis and non-parametric test.Results The mean SFCT was (182.53 ±64.52) μtm in group A,(199.21 t73.07) μtm in group B and (254.21 ±56.85) μtm in group C respectively.The SFCT was thinner in group A and B than that in group C (Z=-4.362,-3.190;P＜0.05),but was the same in group A and B (Z=-1.171,P＞0.05).The mean CBFA was (5.09±0.31) mm2 in group A,(5.41 ±0.20) mm2 in group B and (5.39±0.15) mm2 in group C respectively.The CBFA was reduced in group A than that in group B and C (Z=-4.467,-4.048;P＜0.05),but was samc in group B and C (Z=0.420,P＞0.05).Conclusion SFCT and CBFA are both reduced in IMH eyes.

Objective To study the effect of astragaloside on TGF-β1,SMAD2/3,and α-SMA expression in the kidney tissue of diabetic KKAy mice,and evaluate its potential role in renal interstitial fibrosis.Methods 20 type 2 diabetic KKAy mice were randomly divided into model group and astragaloside group,while 10 male C57BL/6J mice were selected as the control.Astragaloside at 40 mg · kg-1 · d-1 was given when the KKAy mice fed with high-fat diet to 14 weeks old.The mice in the control and model group received normal saline at 40 mg · kg-1 · d-1.Blood glucose meter was used to detect the blood glucose value of each mice at 16th,20th and 24th week.The mice were killed at 24 weeks old and the kidney tissue samples were collected.Pathology morphological changes were observed.Results (1) blood glucose value:cmpared with the control group,the blood glucose value of KKAy mice at 14 week increased significantly,and that of model group also increased significantly at 16th,20th and 24th week (P＜0.05);the blood glucose value of astragaloside group decreased compared with control group (P＜0.05).(2) Morphology of kidney:in the control group,the glomerular and tubular had clear structure,there was no renal interstitial fibrosis;in the model group,the renal glomerular mesangial matrix had broaden,mesangial cell had increased,renal tubular epithelial cell cytoplasm showed vacuole degeneration,renal interstitial inflammatory cell had increaised.In astragaloside group,there were few renal tubular epithelial cell cytoplasm,and there was no obvious fibrosis.(3)TGF-β1,SMAD2/3,and α-SMA expression levels of the kidney issuse:compared with control group,mice in model group up-regulated TGF-β1,SMAD2/3 and α-SMA expression (P＜ 0.05).TGF-β1,SMAD2/3,and α-SMA expression levels in astragaloside group were significantly lower than those in the model group (P＜0.05).There was few phosphorylated SMAD2/3 expression in renal tubular and glomerular nuclei,while that of model group increased (P＜0.01),and compared with model group,that of the astragaloside group decreased (P＜0.05).Conclusion Astragaloside can delay the renal fibrosis process in diabetic mice by influencing the TGF-β/SMADS signaling pathway and down-regulating TGF-β1 and α-SMA expression,thus to relieve renal fibrosis in diabetic mice.

Objective To study the expression of signaling lymphocytic activation molecule (SLAM)CD150 in peripheral blood mononuclear cells(PBMCs)isolated from adult non-responders to recombined yeast gene hepatitis B vaccine.Methods A total of 202 cases were recruited.All these subjects had been immunized with recombined yeast gene hepatitis B vaccine for more than one standard scheme in two years(from Sep 2007 to Dec 2009)and remained negative for hepatitis B markers(HBsAg,anti-HBs,HBeAg,anti-HBe and anti-HBc).After recruitment,all 202 subjects received another standard scheme(0,1 and 6 month)revaccination.The blood samples were collected 7 months later after the first injection of revaccination to detect anti-HBs titer.The PBMCs were isolated from 18 adult non-responders(anti-HBs titer<10 mIU/mL)and 18 adult responders(antiHBs titer≥100 mIU/mL).CD150 expression on cell surface was analyzed by flow cytometry.SAS package was used for t test and spearman rank correlation analysis.Results After rHBsAg stimulation,the percentage of PBMCs expressed CD150 was significantly higher in non-responders (39.20%±10.66%)than responders(23.73%±12.41%)(t=2.1947,P<0.05).The same trend was also observed in rHBsAg stimulated C133+CD4+T cells,but the difference was not statistically significant(49.64%±11.94%vs 37.73%±11.02%)(t=1. 7175,P>0.05).After phytohaemagglutinin (PHA)stimulation,the percentage of CD150-positive PBMCs was also significantly higher in non-responders (39.21%±7.37%)than responders(23.18%±12.68%)(t=2.2835,P<0.05).CD150 expressions in both PBMCs and CD3+CD4+T cells were negatively correlated with anti-HBs titer after rHBsAg stimulation (r=-0.726,P<0.05).Conclusion Activation of CD150 may contribute to the non-response to hepatitis B vaccine.

Objective To investigate the association between carotid-femoral pulse wave velocity (cfPWV) and composition of the ascending aorta in patients with coronary heart disease (CAD),Methods The study population comprised 60 consecutive CAD patients who underwent coronary artery bypass graft (CABG) surgery in Qilu Hospital of Shandong University.cfPWV vas measured using an automatic device (Complior,Artech,France).A quantitative study was conducted on ascending aorta specimens by histological observation (Masson staining and weigert's resorcin-fuchsin staining) and computer image analysis.Bivariate analyses were performed to study the association between composition of the ascending aortic media and cfPWV.Results cfPWV of the CAD patients was higher (14.2±2.0) m/s than that of the normal subjects.On Masson's-stained specimen slides,disorganization of smooth muscle and focal accumulations of collagen (44.1 ± 3.9)％ were visible alongthe medial aorta of the CAD patients.Weigert's-stained cross sections of the ascending aortic media in CAD patients frequently exhibited focal breakdown or discontinuous segments of elastic fibers(18.4±3.2)％,cfPWV had a positive correlation with relative contents of collagen in the ascending aorta(r=0.68,P＜0.01)and a negative correlation vith relative contents of elastin in the ascending aorta (r=-0.59,P＜0.01),but no relation with relative contents of smooth muscle(r=0.01,P＞0.05).Conclusions The reduced aortic elasticity in CAD patients can be partly ascribed to decreased elastin,increased collagen,and their disorganization.cfPWV can reflect the quantitative changes of collagen and elastin in the ascending aortic media in CAD patients.

Objective To analyze the mierosurgery treatment and prognosis of cavernous hemangioma loca-ted in pons. Methods 12 cases with cavernous hemangioma located in ports underwent mierosurgery. 11 lesions lo-cated in dorsal tons were resected through midline suboccipital trans- rhomboid fnssa approach. 1 lesion located in ventrolateral pous was resected with suboceipital retrosigmoid approach. Results All the 12 cavernous hemangiomns were rosected totally and confirmed by the postoperative pathology. Clinical improvement was gained in 6 cases, no change in 3 ,aggravation of facial palsy in 1 ,death in 1. The mean follow-up time was 3 months,and Mill scan dem-onstrated good restoration of brain stem tissue with no recurrence signs of lesion. The symptoms due to the operation recovered to some extent. Conclusion The cavernous hemangioma located in brain stem can be resected safely and effectively given the selection of surgical indication and optimal surgical approach.

Objective To observe the influence of tumor necrosis factor-alpha(TNFα) on skeletal muscle protein catabolism in rats with chronic obstructive pulmonary disease (COPD) and the effects of indomethacin (IND) on it. Methods Duplicated COPD model rats were divided into two groups: the malnutrition group and the normal nutrition group. The malnutrition group were further divided by randomized block design into four groups. Isotonic physiologic saline was administered to group A, the control and the normal nutrition group, and different doses of oral IND were administered to groups B, C, and D weight, concentrations of TNFα, contents of 3-methyl-histidine ( 3- M H ) and tyrosine (Tyr) in the diaphragm and extensor digitorum longus muscle homogenates were measured before and after the intervention. Results Before the intervention, the concentrations of TNFα in the serum of malnutrition groups were all significantly higher than those of normal nutrition group and the control group. After the intervention: (1) The concentrations of TNFα in the serum of the rats of group B, C and D were significantly lower than the group A, especially in group C. The levels of TNFα in serum and body weight of model group rats were negatively correlated ( r = -0. 846, P ＜0. 01 ), as well as the diaphragm and extensor digitorum longus muscle weights ( r = - 0. 778, P ＜ 0. 01; r = - 0. 772, P ＜ 0. 01 ). (2) The levels of 3-methyl-histidine in the diaphragm and extensor digitorum longus muscles of the intervention group C was lower than the COPD normal nutrition group, as well as the intervention groups B and D. The contents of tyrosine in the diaphragm and extensor digitorum longus muscles of the intervention group C was lower than that of the COPD normal nutrition group,as well as the groups B and D. The body weight growth value of the intervention group B were slightly higher than the group A, without significant difference( P ＞ 0. 05 ), while the group C was significantly higher than the group A ( P ＜ 0. 01 ). Conclusions TNFα is involved in the occurrence of COPD malnutrition and skeletal muscle amyotrophy. IND can reduce the TNFα levels in the serum and the catabolic rates of the skeletal muscle proteins in malnutrition rats with COPD, so as to improve partly the skeletal muscle atrophy.