The process of protein synthesis is terminated by one of the three stop codons which are recognized by classⅠ polypeptide release factors.Subsequently, it could promote the hydrolysis of the ester bond of peptidy-tRNA, resulting in release of the nascent polypeptide.Recent results from cryoelectron microscopy, crystallography, NMR, molecular dynamic and biochemical experiments have shed considerable light on the function and structure of the classⅠ release factors.The progress in these aspects were summarized.

Objective This study is to discuss the effects of cognitive therapy on life quality of rural breast cancer patients during chemotherapy in order to offer evidence for choosing the appropriate therapeutic measures.Methods 120 rural breast cancer patients were equally divided into the intervention group and the control group at random.The usual care plus cognitive treatment was given to the patients in the intervention group for 6 months,while only the usual care after chemotherapy was given to the control group.The quality of life assessments were carried out to both groups on the 5th day during hospitalization,and the first,third and 6th month during recheck period of time,respectively.The treatment effect was observed.Results There were statistical significant difference of the total scire of life quality assessment on the 5th day,the first,third and 6th month,respectively,between the intervention group and the control one after cognitive intervention.The downtrend of total score of quality of life in the intervention group after cognitive intervention was more significant than the control group,which indicated the quality of life of the intervention group was better than the control group. Conclusions Cognitive therapy is an efficient method to enhance the quality of life of rural breast cancer patients during chemotherapy.

Objective To investigate the effects of triptolide on proliferation,apoptosis and the changes of Ski,Smad3,Smad7 and collagen type I(ColI) in cultured rat mesangial cells induced by transforming growth factor (TGF)-β1.Methods Cultured HBZY-1 rat mesangial cells were divided into 5 groups:(1)normal control group; (2)TGF-β1 group (10 μg/L); (3)-(5)triptolide (0.4,2,10 μg/L)+TGF-β1 (10 μg/L) groups.The cell proliferation was detected by MTT.Apoptosis of mesangial cells was detected by TUNEL assay.The expressions of Ski,Smad3,Smad7 mRNA were examined by real-time quantitative PCR.The expressions of Ski,Smad3,Smad7 and ColI protein were detected by Western blotting.The localizations of Ski and Smad3 protein were detected by laser confocal fluorescence microscope.Results Compared with the normal control,TGF-β1 (10 μg/L) significantly stimulated mesangial cells proliferation,while decreased apoptosis.The mRNA and protein expressions of Ski,Smad7,Smad3 and ColI protein expression in TGF-β1 group were increased (P ＞0.05).In comparison with TGF-β1 group,triptolide could significantly inhibit TGF-β1-induced mesangial cells proliferation in dose-dependent manner,and promote the apoptosis of mesangial cells.In TGF-β1 group,mRNA and protein expresscons of Ski and Smad7 were increased (P＜0.05),Smad3 mRNA and protein were decreased (P ＞0.05),and ColI protein was decreased (P＜0.01).In comparison with TGF-β1 group,fluorescence intensity of Ski,Smad3 proteins was significantly increased in cytoplasm,while decreased in nucleus.Conclusions Triptolide can inhibit TGF-β1-induced mesangial cells proliferation through regulating the expressions of Ski,Smad7 mRNA and protein,inhibiting Ski.Smad7 translocation to the nucleus,and down-regulating Smad3 mRNA and protein expression.Triptolide can promote apoptosis of mesangial cells.

Objective To investigate the effect of cognition training on the recovery of balance after stroke. Methods forty-five hemiplegic strokd patents with cognition deficit were revruited and sddigned into an experimental group and a control group according to the results of an assessment with Loewenstein's Occupational Therapy Cognition Assessment battery (LOTCA). The patients in the two groups folloled routine systmatic rehabilitation programs. The patients in the (LOTCA). The patients in the two groups followed routine systmatic rehabilitation programs.The patiena in the experimental group received pertinent cognition training 5 days/week for 6 weeks. LOTCA,Brunel's Balance Assessment (BBA), the Berg Balance Scale (BBS) and Brunnatrom functional categories were enployed to evaluate the patients before and after treatment with regard to their cognition, balance control and motor function in their lower limbs. Results After treatment, there were statistically significant differences between preand post-treatment BBA and BBS scores in all groups. Average BBA, BBS and LOTCA scores in the experimental group were significantly higher than in the control group. The improvements in BBS, BBA and LOTCA scores in the experimental grou were significantly greater than in control group. Conclusion Cognition treatment can contribute significantly to improving balance and postural control among stroke survivors.

Aim To investigate the effects of osthol on bone marrow stromal stem cells in vitro under the con-ditions of the ability to differentiate into osteoblasts and the case of proliferation. Methods The rat bone marrow sample was obtained,and the all bone marrow cell culture methods were used to separate and collect the stratum of mononuclear cells. The cells were cultured in DMEM containing 10% fetal bovine serum. Three days later the culture medium was changed for the first time. Nine days later,serial subcultivation proceeded. The final concentration of osthol was 1 ? 10 -4,1 ? 10 -5,1 ? 10 -6,1 ? 10 -7 mol?L -1 respectively. MTT method was adopted in proliferation analysis. Under the induced condition,the Alkaline phosphatase activity, calcium salt sediment yield and osteocalcin were meas-ured on 4th,8th,12th,16th day. On the fifteenth day,his-tochemistry dyeing proceeded for calcified tubercle. Total RNA was isolated and the gene expression of bFGF, IGF-1,Osterix and Runx-2 was investigated by RT-Real Time PCR. Results The BMSCs proliferation was refrained by osthol dose-dependently. But it evidently led to osteogenesis. The ALP activity,calcium salt sediment yield and osteocalcin were raised,and calcified tubercle amount was increased. Besides,it also could enhance the mRNA level of bFGF,IGF-1,Osterix and Runx-2. Conclusion The osthol with final concentra-tion of 1 ? 10 -5 mol?L -1 can markedly promote BM-SCs differentiation to osteogenesis. which proves osthol is an active constituent of the traditional Chinese medi-cine Common Cnidium Fruit.

Aim To establish cerebrocardiac syndrome model in rats. Methods Right middle cerebral artery of rat was occluded (MCAO) with nylon thread and Ⅱ lead ECG was monitored continuously within 2 h to record the emerging of arrhythmias. 30 min, 2 h, 24 h after middle cerebral artery occlusion or 6 h reperfusion after 2 h occlusion, left ventricular myocardiums were observed with transmission electron microscope to find the morphological damage and brains were marked with TTC to locate infarction area. Results (14.9?11.4) minutes after MCAO, 71%(60/85)model rats had abnormal ECG changes including 38 %(32/85)premature ventricular contraction, 27 %(23/85)atrial premature beats, 5%(4/85)ventricular tachycardia, 1.2%(1/85)sinus tachycardia. Arrhythmias sustained (29.0?23.2 )minutes. Ventricular myocardial cell injury was obvious: chaotic and broken mitochondria ridges, aggregated chromatin under the nucleus membrane, deposited glycogen granules in the cytoplasma. 30 min, 2h, 24h after MCAO the infarction rates were 8.7%?1.1%,11.4%?2.3% and 13.7%?3.1% respectively. Conclusion A stable cerebrocardiac syndrome model in rat might be induced by means of occluding right middle cerebral artery and the morphological bases of cerebrogenic cardiac arrhythmias are myocardial cell injury caused by cerebral infarction.

Objective To evaluate the value of tumor necrosis factor -α( TNF-α) ,leptin ( LEP) ,interleu-kin-6 (IL-6) and carcinoma embryonic antigen (CEA) in both serum and pleural effusion in differential diagnosis of tuberculosis and malignant tumor .Methods Detection were performed on tuberculosis and malignant tumor patients,comparation was conducted on the level and positive ratio of TNF -α,LEP,IL -6 and CEA in different groups.Results The levels of TNF-α,LEP,CEA in serum decreased significantly compared with malignant tumor patients[(34.45 ±17.11)μg/L vs (70.26 ±19.31)μg/L,(490.71 ±197.58)μg/L vs (2 013.62 ±596.22)μg/L, (226.81 ±87.09)μg/L vs (5 329.62 ±1 523.58)μg/L;t=5.221,9.673,12.078;P=0.012,0.031,0.000],but IL-6 was not [(159.73 ±30.33)μg/L vs (22.31 ±3.20)μg/L;t=-16.114;P=0.001];The level of TNF-α, LEP,CEA in pleural effusion was decreased significantly compared with malignant tumor patients [( 20.31 ± 5.62)μg/L vs (42.06 ±14.07)μg/L,(702.46 ±375.01)μg/L vs (4 532.27 ±2 307.83)μg/L,(112.25 ± 48.72)μg/L vs (4 190.84 ±1 534.29)μg/L;t=5.017,12.096,12.236;P=0.022,0.016,0.033],but IL-6 was not [(92.15 ±32.64)μg/L vs (10.29 ±3.91)μg/L,t=-11.583;P=0.031].The positive ratio of TNF -α, LEP,CEA in serum was decreased significantly compared with malignant tumor patients (17.8% vs 72.2%,20.0%vs 91.7%,0.0% vs 100.0%;χ2 =24.341,41.145,81.000;P =0.000,0.000,0.000),but IL -6 was not (100.0%vs 0.0%,χ2 =81.000;P=0.000);The positive ratio of TNF -α,LEP,CEA in pleural effusion was decreased significantly compared with malignant tumor patients (28.9% vs 75.0%,4.4% vs 100.0%,0.0% vs 97.2%;χ2 =17.012,73.326,77.038;P=0.000,0.000,0.000),but IL -6 was not(97.8% vs 0.0%,χ2 =77.059;P=0.000).Conclusion The level and positive ratio of malignant tumor patients are higher than tuberculo-sis patients,but IL-6 is not,these indicators are helpful in diagnosing tuberculosis and malignant tumor .

Objective To investigate the predictive value of plasma gelsolin in the prognosis of patients with ST-sgement elevation myocardial infarction ( STEMI ) and undergone primary percutaneous coronary intervention ( PCI ) .Methods The study included 206 patients with STEMI and undergone primary PCI, 148 patients with stable angina pectoris and received elective PCI and 80 healthy volunteer as the health population (NP) control.Blood samples were taken at admission on day 1, 3, 5, 7 and 9 to determine the plasma gelsolin level .Patients′baseline clinical characteristics , blood biochemistry tests results , details of operation and their cardiovascular risk factors were recorded .Major adverse cardiovascular events (MACE) within one year were recorded.Results (1) Compared to the stable angina group and the NP group, the level of plasma gelsolin of STEMI patients were obviously decreased at various time points ( all P<0.05 ) .There were no statistical differences between the stable angina group and the NP group .( 2 ) Patients with STEMI were catagorized into MACE group (n=78) and non-MACE group (n=128) according their follow up record in 1 year.The level of plasma gelsolin in patients with MACE were lower than the non-MACE group ( P <0.05 ) with the minimum value detected on day 7.Among patients complicated with MACE (n=78), they were further devided into the deceased group (n=18) and the survival group (n=60).Plasma gelsolin levels were lower in the deceased group with satistical differences found on day 5, 7 and 9.(3) Single factor Logistic regression analysis showed that the level of plasma gelsolin on day 7 was independent risk factor of MACE within one year ( P =0.014 ) .( 4 ) Setting the cutoff value of plasma gelsolin on day 7 as 21.7 mg/L,the sensitivity and speciticity for the MACE in STEMI patients treated with primary PCI within one year were 82.1%and 81.4%respectively , with the area under the receiver operator characteristic curve ( ROC ) was 0.854 ( 95% confidence interval 0.732 -0.961 , P <0.01 ) . Conclusions Plasma gelsolin levels are correlated with the severity of STEMI lesions and plasma gelsolin can be used as predicting factor of prognosis .

Studying effects of 50 Hz sinusoidal electromagnetic fields (SEMFs) with different intensities on peak bone mass (PBM) of rats may provide a theoretical basis for application of electromagnetic clinical field. 30 female SD rats, 6 weeks of age, were randomly divided into three groups: the control group, 0.1 mT electromagnetic field group (EMFs) and 0.6 mT EMFs. The EMFs groups were treated for 3 h/day. After 8 weeks, we examined their bone mineral densities (BMD) , measured their bone biomechanical properties, and made serum levels of osteocalcin (OC), tartrate-resistant acid phosphatase 5b (TRACP 5b), and histomorphometry. It was found that the BMD (P < 0.01), maximum mechanical load (P < 0.01) in the 0.1 mT group were significantly higher than those in the control group, and Yield strength (P < 0.05), the analyses of serum bone turnover markers and histomorphometric parameters were better than those in the control group (P < 0.05). However, the 0.6 mT group did not have significantly difference comparing with that in the control group. This study proved that 50 Hz 0.1 mT SEMFs can increased BMD, bone strength, and bone tissue microstructure. Therefore, 50 Hz 0.1 mT SEMFs can improve peak bone mass of rats.
Acid Phosphatase ; blood ; Animals ; Bone Density ; Bone and Bones ; physiology ; Electromagnetic Fields ; Female ; Isoenzymes ; blood ; Osteocalcin ; blood ; Rats ; Rats, Sprague-Dawley ; Tartrate-Resistant Acid Phosphatase