Using an anti-nucleolar protein B23 monoclonal antiboby, we examined the changes of protein B23 content in NIH3T3 fibroblasts during serum-induced proliferation and the difference in protein B23 content between mitotic and interphase NIH3T3 fibroblasts by immunofluorescence and im-munoblot methods. When NIH3T3 cells grew confluent, the serum containing medium was removed and replaced by serum-free medium,and the cells were cultured for another 24h. Then cells were refed with serum and further cultured. The results showed that protein B23 content was low in serum-starved NIH3T3 cells,and it markedly increased after serum addition. Furthermore,the increase occurred early at 6h after serum treatment. It was also showed that protein B23 content in mitotic cells blocked by the microtubule inhibitor colcemid was much higher than that in interphase ones. Our results suggested that nucleolar protein B23 might play some roles in the early stage of serum- induced proliferation and during transition from G2 to mitosis in cell cycle.

Objective To compare the early efficacy of two different ways of rehabilitation exercises in total knee arthroplasty (TKA) patients. Method From January 2011 to January 2014,136 patients having undergone TKA were randomly divided into two groups. In group A , patients exercised under the guidance with doctor. In group B, patients exercised by using continuous passive movement (CPM) machine. Compared the data from the two groups including range of motion (ROM) of the knee joint, knee function score (KFS) and circumference of the knee joint, t test of independent sample was utilized in the research. Results All patientswere followed up in 4 weeks. The ROM and KFS of Group A was significantly better than Group B (P < 0.05). The knee circumference had no statistically significant difference between two groups (P> 0.05).Conclusion Group A and B are effective methods in TKA patients in early rehabilitation training. But training under the guidance of doctor has greater advantages than CPM.

Objective To explore the mechanism of reversal of mutidrug resistance of GBC-SD cell lines by grape seed polyphenols(GSP).Methods GBC-SD cell lines were used to determine the effect of GSP.MTT assay was adopted to evaluate the cytotoxity(IC_(50)),RT-PCR were used to determine MDR1mRNA,(P-gp),bcl-2 and cellular adriamycin was measured by flow cytometry.Results In non-toxic(3?g/mL) and low toxic(6?g/mL) comcentration of GSP treated group(P

0.05) was observed. Bcl 2 expression was related with differentiation of GC(P0.05).Conclusion: p53,bcl 2,c erbB 2 may be involved in the development of GC.

Objective To study the effect of sub-glottal convergence angle on the degree of glottal closure, and to analyze the potential mechanism of dysphonia by the incomplete glottal closure.Methods Three vocal fold positions (adduction, intermediate and abduction) were evaluated by the degree of glottal closure, and divided into three groups.The neck CT images of the subjects were gathered.The vocal folds were adduction group when the normal subjects made a sustaining phonation /i:/ during CT scanning;the vocal folds were abduction group when the normal subjects made a deep breathing during CT scanning, and the unilateral vocal folds were incomplete closing group when the unilateral vocal fold paralysis subjects made a deep breathing during CT scanning.3D models of the vocal folds and the airway were reconstructed using Mimics software, through which the sub-glottal convergence angle was measured.Using one-way factor analysis of variance, we compared the angle among three groups.Results The angle changed with degree of glottal closure, with statistically significant differences among the three groups(P<0.01).The means of the angle in three groups were 33.49°±3.75°, 55.03°±2.61° and 75.02°±7.32°.Conclusion The 3D model generation from CT data is an effective method of measuring the sub-glottal convergence angle, while the angle changes with the degree of glottis closure.The angle may affect sub-glottal pressure distribution in the sub-glottal shear or normal direction and influence vocal fold vibration, which would make vibration and vocal fold mucosal wave generation more difficult, and might cause dysphonia.

Objective To observe the clinical effect of the treatment of bronchial asthma with the Qingfeiyin and Bailing capsule.Methods 107 cases with bronchial asthma were classified into a control group and a treatment group randomly.The control group was treated with the Ipratropine (40-80 ug for each time)and the treatment group was glven Ipratropine and Qingfeireyin(50ml for each time)plus Bailing Capsule(30pills for each time).One course of treatment was 2months.Results The therapeutic effect of treatment group was significantly better than the control group(P＜0.05).Condusion Qingfeiyin and Bailing capsule has excellent effect in treating bronchial asthma.

Objective To investigate the effect of neonatal hypoxic myocardial injury and bradycardia on cerebral hemodynamics and brain tissue regional oxygen saturation (rSO2),and to provide patho-physiological evidence for treatment of neonatal hypoxic-ischemic encephalopathy (HIE) in acute phase.Methods Ninety nine full-term newborns admitted into Department of Neonatology,Peking University First Hospital from December,2005 to December,2008 were enrolled in this study.There were 18 newborns with both myocardial injury and HIE (group 1),31 newborns with HIE but without myocardial injury (group 2) and 50 cases of neonatal jaundice (control group).From 3 to 7 days after birth,Doppler ultrasound was used to measure systolic velocity (Vs),diastolic velocity (Vd) and resistance index (RI) of the anterior cerebral artery; and brain tissue rSO2 was detected by near infrared spectroscopy.The differences among groups were compared by variance analysis and LSD test.Brain tissue rSO2 before and after treatment of 20 newborns with bradycardia for various causes were detected and the difference was compared by paired t test.Results (1) Vs of group 1,group 2 and the control group was (19.35±5.13),(29.35±4.28) and (32.62±7.47) cm/s respectively; Vd was (6.43±2.98),(11.21±3.16) and (11.50±3.03) cm/s; RI was 0.68±0.10,0.62±0.03 and 0.64±0.06; brain tissue rSO2 was (52.4± 2.8)％,(54.6±3.1)％ and (62.1±1.9)％.There were significant differences among the three group(F=29.999,19.393,5.283 and 137.952,P＜0.01).Vs,Vd and rSO2 of group 1 were lower than that of group 2 and the control group (P＜0.05).RI of group 1 was higher than that of group 2 and the control group (P＜0.05).Vs and rSO2 of group 2 were lower than that of control group,but there were no differences between the two groups in Vd and RI.(2) The brain tissue rSO2 of newborns with bradycardia after treatment was higher than that before treatment [(58.7±4.6)％ vs (50.9±3.2)％,t=6.239,P＜0.01].Conclusions The disturbance of cerebral hemodynamics and cerebral oxygenation in HIE newborns are aggravated by hypoxic myocardial injury.Stable heart rate might be very important to early treatment for HIE.

Objective To determine the prognosis and risk factors of neonatal cerebral infarction.Methods From January 2002 to December 2010,44 newborn infants were diagnosed with cerebral infarction by imaging examinations at Peking University First Hospital.The neurodevelopmental outcomes of these newborn infants were followed up and evaluated by clinical manifestations,Gesell development scale,cranial imaging,electroencephalogram and auditory evoked potential.Factors related to prognosis were analyzed with single and multi-factor Logistic regression analysis.Results Thirty-eight (86％) cases were followed up,and of these cases,five children died and the results of three were inconclusive due to small age (less than 6 months old).Among the remaining 30 children,neurodevelopmental outcome was normal in 15 cases and abnormal in the remaining 15 cases,thus,the incidence of sequelae was 50％ (15/30) and the mortality rate was 13％ (5/38).Of the 15 abnormal cases,all had cerebral palsy and movement retardation,eight cases had cognitive impairment,eight cases had epilepsy and five had visual impairment.The incidence of large cerebral infarction (more than one lobe) was 14/15,worse cranial imaging outcome (one month after treatment,cerebral infarction lesion still present or had expanded)was 13/15,and severe complications was 8/15 in the newborns with sequelae,which were higher than in those without sequelae (4/15,5/15 and 1/15,respectively) (x2=13.889,8.889 and 7.778,all P＜0.05).Logistic regression analysis showed that large cerebral infarction was a risk factor for sequelae (OR=38.500,95％C1:3.749-395.407,P=0.002),however,worse cranial imaging outcome (OR=8.563,95％CI:0.909-80.683,P=0.061) and severe complications (OR=18.024,95％CI:0.516-630.163,P=0.111) were not risk factors for sequelae.Cerebral infarction with middle cerebral artery injury had a high risk of movement retardation (OR=6.000,95％CI:1.172-3.725,P=0.025),and those with a large cerebral infarction were more likely to have epilepsy (x2=7.273,P=0.010).The incidence of large cerebral infarction in the newborn infants with cognitive impairment was 8/8,which was much higher than in those without cognitive impairment (46％,10/22),thus,infarct area may be related to cognitive ability (x2=7.273,P=0.010).Conclusions Neonatal cerebral infarction might result in many types of sequelae,with motor impairment being the most common form.A large cerebral infarction is more likely to result in abnormal neurodevelopmental outcome.

Objective To investigate the correlation between hypoglycemia and brain injury of newborns.Methods Medical records and follow-up data of 110 newborns with hypoglycemia (blood glucose level≤2.2 mmol/L) who admitted into neonatal department of Peking University First Hospital from December 2006 to December 2009 were studied.All patients were divided into 3 groups:no brain injury group,mild and severe brain injury group according to their clinical manifestation,cerebral radiological characteristics and cerebral functional tests.By using receiver operating characteristic (ROC) curve and x2 test,the potential optimal blood glucose level and duration of hypoglycemia for predicting brain injury were confirmed.Multivariate Logistic regression was taken to determine independent predictors for brain injury.The analyzed factors included gender,preterm/small for gestational age,hyperbillirubinemia,fetal distress,asphyxia,infection,seizures and maternal hypertensive disorder complicating pregnancy and hyperglycemia.Results Among the 110 hypoglycemia newborns,33 (30.0％) infants suffered from brain injury,of which 23 were mild and 10 were severe.Blood glucose ≤1.7 mmol/L had high specificity (73％) and sensitivity (60％)for predicting brain injury.When blood glucose≤ 1.7 mmol/L,the incidence of brain injury and severe brain injury was 43.6％ (24/55) and 18.2％ (10/55),which was higher than those [16.4％(9/55) and 0.0％ (0/55)] of patients whose glucose level ＞1.7 mmol/L(x2 =9.74 and 11.00,P＜0.01 respectively).Blood glucose ≤ 1.2 mmol/L had high specificity (100％) and sensitivity (81％) for predicting severe brain injury.When blood glucose ≤1.2 mmol/L,the incidence of severe brain injury was higher than that of the patients whose glucose level was higher than 1.2 mmol/L [34.5％ (10/29) vs 0.0％ (0/81),x2 =30.72,P＜0.01].Duration of hypoglycemia ≥12 h had specificity (100％) and sensitivity (36 ％) for predicting brain injury.When duration of hypoglycemia ＜12 h,the incidence of brain injury was lower than that of the patients whose duration of hypoglycemia≥12 h [21.4％ (21/98) vs 6/6,x2 =27.69,P＜0.01].Multivariate Logistic regression showed that fetal distress (OR=4.69,95％CI:1.47-14.97,P=0.009),glucose level≤1.2 mmol/L (OR =5.16,95％CI:1.56-17.03,P=0.007),duration of hypoglycemia≥12 h (OR=8 885 220 297.12,95％CI:0.00-∞,P =0.000) and maternal hyperglycemia (OR =3.34,95％CI:1.01-11.02,P=0.048) were independent risk factors for neonatal brain injury.Conclusions Low blood glucose level and prolonged hypoglycemia might induce injury of neurol system.Fetal distress and maternal hyperglycemia might increase the incidence of brain injury in newborns with hypoglycemia.

OBJECTIVE:To establish physiological pharmacokinetic (PBPK) model of cefdinir in healthy volunteers,and to predict pharmacokinetic process of cefdinir in volunteers after oral administration. METHODS:Using“toubao dini”“cefdinir”“logP”“pKa”as keywords,related literatures about physico-chemical constants of cefdinir were retrieved from CNKI,ScienceDi-rect,PubMed and other databases;according to related guidelines and preliminary clinical trial plan of FDA,GastroPlusTM 8.6 soft-ware was used to establish PBPK model of oral administration of cefdinir;the effectiveness of the model was evaluated by multiple error. The model was used to simulate the absorption of cefdinir in the gastrointestinal tracts. The bioequivalence of test preparation and reference preparation were evaluated through single and population(n=500)simulation tests using cmax and AUC0-∞ of cefdinir reference preparation (capsule and granular formulation) as factors when release rate t85%=15 min (i.e. accumulatively released 85% within 15 min). RESULTS:The blood concentration-time curves of cefdinir predicted by PBPK model fitted well with mea-sured value(R2≥0.95);the pharmacokinetic parameters(cmax,tmax,AUC0-∞)were close to measured results,and the multiple er-rors were less than 2. After oral administration,cefdinir was mainly absorbed by the intestinal tract (45.6%),especially by seg-ment 1 of jejunum(14.8%);the absorption amount was significantly lower than the release amount of absorption site,and reached the maximal value(about 40%)within 4 h. The results of single simulation test showed that there was no statistical significance in cmax and AUC0-∞ between cefdinir test and reference preparations (P>0.05). The results of population simulation test showed that the relative bioavailability of cefdinir test particle and test capsule respectively were 99.01%-102.99% and 97.60%-105.90%;90%CI of cmax and AUC0-∞ values were within 80%-125% of reference preparation. CONCLUSIONS:The PBPK model is accurate and reliable in this study,can provide reference for pharmacokinetic study and bioequivalence evaluation of cefdinir preparations. Test preparation and reference preparation are equivalent.