Objective To observe the effects of menopause on prothrombotic profiles in ovariectomized rats .Methods Thirty two healthy female SD rats of 9 to 10 months were divided into 4 groups, the control shamed and the observation groups ovariectomized .Rats in the baseline group and the early menopause group were sacrificed one week later , and the control and late menopause group 10 weeks later.The prothrombotic profiles were detected including plasma FIB , ATⅢ activity, PAI-1 levels, D-D level, vWF levels and NO concentration, TXA2 and PGI2 levels.Results In early menopause, plasma FIB increased dramatically while ATⅢactivity remained lit-tle changed.PAI-1 demonstrated an increasing trend .vWF significantly increased but NO significantly decreased .In later menopausal stage, PAI-1 increased dramatically but FIB somewhat decreased .Plasma ATⅢactivity significantly increased and vWF still remained a high level.NO increased a little.In both early and later stage, TXA2 and PGI2 simultaneously increased while D -D showed little change between groups .Conclusion Menopause plays different roles in different aspects of thromoembolism , resulting in increased risk in early menopause due to prothrombotic state and decreased risk in later menopause when new balances between profiles were established .

Objective To study effects of raloxifene (RLX) with different doses of conjugated equine estrogen(CEE) on prothrombotic profiles in the ovariectomized rats model.Methods Total of 32healthy female SD rats at age of 9 to 10 months were equally divided into every 8 rats at 4 groups randomly.One week after ovariectomized,they were treated by drugs,including control group with placebo(0.9％ Nacl intragastric administration),RLX group with RLX 6 mg/(kg · d),RLX and low CEE group with RLX 6 mg/(kg · d) + CEE 0.07 mg/(kg · d)and RLX and high CEE group with RLX 6 mg/(kg · d) + CEE 0.5mg/(kg· d)for 10 weeks before death.Thrombin turbidimetry method was used to evaluate the plasma fibrinogen(FIB),transmitting substrate method for antithrombin Ⅲ (AT Ⅲ) activity,double-antibody sandwich ELISA for plasminogen activator inhibitor 1 (PAI-1),D-dimer (D-D) and yon Willebrand factor (vWF) and nitrate reductase method for nitric oxide(NO).Results (1) Coagulation and anticoagulation indicators:it was observed (1.62 ± 0.22) g/L FIB at control group,(2.02 0.54) g/L at RLX group,(1.97 ±0.16) g/L at RLX and low CEE group,(2.00 0.18) g/L at RLX and high CEE group.There was a statistically significant difference between control group and any one of treatment groups(P ＜ 0.05) and no statistical significance among those three treatment groups (P ＞ 0.05).No significant change was observed in plasma AT Ⅲ activity among groups (P ＞ 0.05).(2) Fibrinolytic and anti-fibrinolytic indicators:it was observed (14.1 2.8) μg/L PAI-1 at control group,(20.0 ±3.3) μg/L at RLX group,(41.5 ±5.5) μg/L at RLX and low CEE group,(38.9 ± 6.0) μg/L at RLX and high CEE group.A remarkable increase was observed between control group and any one of treatment groups(P ＜0.05).But there was no significant difference of D-D among groups (P ＞ 0.05).(3) Endothelial function:it was (43 ± 7) ％ vWF at control group,(49±5)％ at RLX group,(46±6)％ at RLX and low CEE group,(36±5)％ at RLX and high CEE group.The vWF of RLX and high CEE group was the lowest among all groups (P ＜0.05).There was no difference of NO among groups (P ＞ 0.05).Conclusions In the different links of thrombosis,RLX gives different fuction and may increase the risk.CEE plays a synergism role in the matter of fibrinolysis and anti-fibrinolysis with RLX,further giving rise to thrombosis effect of RLX.And it also has a protective role in the function of vascular endothelium to some extent.But this only works with high dose.

Objective To explore the effects of fluoride with different doses on the expressions of TGF-? and Smad2/3 in fibroblast and osteoblast at different periods.Methods Fibroblasts and osteoblasts were exposed to different concentrations of fluoride(0,0.0001,0.001,0.1,1,10 and 20 mg?L~(-1)).The levels of TGF-? protein and Smad2/3 at 2,4,24,48 and 72 h after treatment were measured by using ELISA method.The expression of TGF-? mRNA was tested with RT-PCR method.Results In fibroblasts,the contents of TGF-? protein were decreased in the groups of 0.001,0.1,1,10 and 20 mg?L~(-1) F~-at the time of 2 h and in the groups of 1.0001,0.001,0.1,10 and 20 mg?L~(-1) at the time of 4 h(P

Objective To observe the expression of c-fos mRNA and protein in fluoride treated mouse fibroblast (FB) and osteoblast (OB) and to further explore the effects of c-fos in the osteogenic action of FB. Methods Mouse FB and OB were divided into control group and six fluoride groups (0, 0.0001, 0.0010, 0.1000, 1.0000, 10.0000,20.0000 mg/L F-), and the levels of c-fos protein at 2,4,24,48,72 h and c-fos mRNA at 48 h were measured by using ELISA and RT-PCR methods. Results Compared with the control group, fluoride increased the content of c-fos protein obviously in all FB group(P<0.01); and it is increased in 0.0001,0.0010 mg/L groups at 48 h (0.73±0.04, 0.64±0.14) and 0.0001 mg/L group at 72 h(0.70±0.17) in OB compared with the control group (0.32±0.04,0.27±0.05, P<0.01). Compared with the control group (0.95±0.11), RT-PCR revealed an increasing tendency of the expression of c-fos mRNA at 48 h in FB (1.06±0.16, 1.06±0.12,1.12±0.16,1.04±0.15,1.04±0.10,1.15±0.29), but the difference was not statistically significant(P>0.05); however, a statistically significant difference(P<0.01) of c-fos mRNA in 20.0000 mg/L group(1.40±0.17) in O B was found compared with the control group (1.06±0.06). Conclusion The higher expression of c-fos mRNA and protein in FB induced by fluoride may play an important role in the transformation of osteoblastic phenotype as well as increase the osteogenesis ability in FB.

Bone Density ; physiology ; Bone Diseases ; epidemiology ; etiology ; metabolism ; pathology ; Calcium ; metabolism ; China ; epidemiology ; Endemic Diseases ; Fluoride Poisoning ; epidemiology ; etiology ; metabolism ; pathology ; Humans ; Osteoblasts ; physiology ; Oxidative Stress ; Parathyroid Hormone ; metabolism ; Thioredoxins ; metabolism ; Transcription Factor AP-1 ; metabolism

BACKGROUND: Cervical lymph nodes are draining region of cornea. It is believed that aqueous fluid goes through a minor pathway named uveoscleral drainage, which will allow passage of antigen-presenting cells (APC) directly to the draining lymph nodes and induce allograft rejection after keratoplasty.OBJECTIVE: To explore the inhibitory effects of cervical lymphadenectomy in alkali induced high-risk corneal transplantation.DESIGN: A randomized controlled animal experiment.SETTING: State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University.MATERIALS: The experiment was performed in the State Key Laboratory of Ophthalmology (No. 2006DA105054), Zhongshan Ophthalmic Center, Sun Yat-sen University from May 2005 to February 2007. 144 male animals (1-2 months old) including 104 SD rats and 40 Wistar rats were provided by the animal experimental center of Sun Yat-sen University. Sandwich enzyme-linked immunosorbent assay (ELISA) kits for interleukin-2 (IL-2) and interferon-γ (IFN-γ) were brought from BioSource International company (USA). The animal treatment in the experiment was accorded with the statement in Association for Research in Vision and Ophthalmology (ARVO) for animals.METHODS: With the SD rats as recipients, and Wistar rats as donors, all rats were subjected to corneal allografting. The recipient rats were randomly divided into 4 groups (n=20): group A (control group) which underwent corneal transplantation; group B which was subjected to bilateral cervical lymphadenectomy; group C, corneal transplantation 21 days after the alkali burn injury; group D, cervical lymphadenectomy following group C. The immune rejection of grafts was evaluated by detecting the expression of IFN-γ and IL-2 using ELISA. The time when allograft rejection occurred was recorded and mean survival time (MST) was compared among the groups. The development of corneal inflammation and new vessels was examined by slit lamp microscope and histopathological examination.MAIN OUTCOME MEASURES: ①The development of corneal inflammation after corneal alkaline burns. ②MST of rats in each group following transplant. ③The expression of IL-2 and IFN-γ in grafts of each group. RESULTS: ①Normal rat cornea was transparent without inflammation or neovascularization. There were many inflammatory cells invading to stroma on day 3 after burn. Then, the inflammation of cornea resolved gradually 3 weeks after the burn, but corneal neovascularization reached the peak at that time. Corneal blood vessels regressed completely at the end of 8 weeks after the burn. ②The MST of group A, B, C, and D was (10.40±1.14), (46.30±9.46), (7.00±1.58), and (15.00±3.39) days, respectively. Compared with the group A, the MST of group B was significantly longer (P < 0.05), and the MST of grafts in group D was also significantly longer than group C (P < 0.05). ③The expression of IFN-γ and IL-2 proteins was absent in group B. Compared with group C, the expression of IL-2 and IFN-γ proteins in group D significantly decreased on days 3, 7, 10, and 14 after keratoplasty (P < 0.05). CONCLUSION: Cervical lymphadenectomy therapy can effectively inhibit corneal allograft rejection in normal and high-risk corneal beds after alkali burn injury.

Objective To observe endoplagmic reticulum stress in bone tissue of fluomsis rats and further explore the pathogenesis of skeletal fluorosis.Methods 48 Wistar rats were divided into 4 groups according to their body mass.The control and low.calcium group were fed with normal diet(0.79%calcium)and low-calcium diet(0.79%calcium)respectively,and both drank tap water(sodium fluoride concentrations＜1 mg/L).High fluoride and low.calcium plus high-fluoride groups were fed with normal diet(0.79%calcium)and low-calcium diet (0.79%calcium)respectively,and both drank tap water containing sodium fluoride(sodium fluoride concentrations 221 mg/L).During experimental period,rats were measured body mass once a week with a stand diet and water available ad libiturn.The experimental period was 3 months.The biochemical techniques were used to test the indicators of oxidative stress and ALP in seFum of fluorosis rats.The total RNA was extracted from the one side of the femur,and the transcription level of Bip,Xbp1,CHOP and PDI were investigated by reverse transcription polymerase chain reaction(RT-PCR).Results The level of MDA in serum of low-calcium plus high-fluoride group wag higher than that of the control[(14.74±3.11)μmol/L vs(10.15±1.96)μmol/L,P＜0.05];the activity of GPx was ma~edly higher in hish-fluoride group compared with the control[(3.87±0.41)×103 U/L vs(2.85± 0.55)×103 U/L,P＜0.05];the level of uric acid in sel'um was significantly lower both in high-fluoride group and low-calcium plus high-fluoride group compared with the respective control and the low-calcium group[(73.95± 9.52)μmol/L vs(110.43±25.48)μmol/L,(54.32±22.09)μmol/L vs(101.71±17.01)μmol/L,P＜0.05]. The activity of ALP wag obviously higher in low-calcium plus high-fluoride group compared with the control [(24.77±4.57)×103U/L vs (12.91±3.97)×103U/L,P＜0.01)].The mRNA expression of Bip/GAPDH in bone tissue was markedly higher in bone of high-fluoride group and low-calcium plus high-fluoride group compared with the control(1.38±0.24,1.35±0.12 vs 1.14±0.06,P ＜ 0.05). The expression of Xbp1/GAPDH in bone tissue significantly increased in low-calcium plus high-fluoride groups compared with the control and the low-calcium group (1.48±0.20 vs 1.02±0.25,1.07±0.25,P ＜ 0.05 or ＜ 0.01);and CHOP/GAPDH in bone tissue significantly increased in low-calcium plus high-fluoride groups compared with the control(0.84±0.18 vs 0.52±0.07,P ＜ 0.05 ). Conclusions Accelerated osteogenetic action is seen in fluorosis rats,accompanied by oxidative stress and bone endoplasmic reticulum stress,which is likely involved in the pathogenesis of skeletal fluorosis.

AIM: To investigate the influence of Buxinqi Capsule (BXQ) on myocardial ischemia reperfusion injury in rats. METHODS: In this study, the experimental model was established by reperfusion for 60 minutes in rats after ligaturing left anterior descending coronary artery (LAD) for 30 minutes. Serum creatine phosphokinase (CPK), lactate dehydrogenase (LDH), superoxide dismutase (SOD) and malondialdehyodebis (MDA), area of myocardial infarction and occurrence of arrhymia were investigated. RESULTS: BXQ significantly decreased level of CPK and LDH and MDA, and obviously improved the activity of SOD, decreased reperfusion arrhythmias and arrhythmias severity index (ASI), and decreased the area of myocardial infarction. CONCLUSION: BXQ has protective effect on the damage of myocardia ischemia reperfusion in rats

OBJECTIVE To detect the condition of bacteria of the air in wards of our hospital in order to reduce the possibility of air spread. METHODS Ten tuberculosis wards were chosen at random for study.Detected the bacteria content of the air in wards used before and after respectively and analysed the results. RESULTS The average of backgroud bacteria was 164 CFU/m 3 before the wards were used.Two years later,the average of bacteria increased to 682 CFU/m 3.The ratio was 1∶3:2 on average.There were significant differences between them. CONCLUSIONS Humen are the main facters that make the air polluted in these wards.The bacteria content will decline by good environment cleaning sanitation,ventilation and strengthening steriling management.Infection will decline in the hospital.