Objective To investigate the effects of caffeine on cerebral cortical activity in preterm infants. Methods The preterm infants with 28-34 week gestational age and without asphyxia at birth were recruited as the subjects from January to September 2016. The infants who received conventional caffeine citrate were assigned to the caffeine group, while the infants with the same postmenstrual age did not receive any drugs that excite respiratory center were assigned to the control group. In the caffeine group, after the use of caffeine citrate stopped, the amplitude integration electroencephalogram (aEEG) recording were performed at 33, 34, 35 weeks of postmenstrual age. All the aEEG recordings were continuously monitored for at least 4 hours. The aEEG images were assessed by Burdjalov scoring system, and the interburst intervals were calculated. The effects of caffeine on preterm infants' cerebral cortical activity in early life were analyzed. Results In a total of 49 preterm infants recruited, 21 were in caffeine group and 28 in control group, and the ratio of male and female was 1.45:1. At the same postmenstrual age, the total score and individual scores of aEEG assessed by Burdjalov scoring system were not significantly different between caffeine group and control group. However, the length of interburst interval was significantly shorter in caffeine group than that in control group (P<0.05). All the recruited preterm infants had no seizure-like activity when the aEEG was monitored. Conclusion The use of caffeine citrate has effects on EEG activity in early life of preterm infants, which may accelerate the brain maturation of preterm infants

Objective: To investigate the alteration of red cell deformability (RCD) and adenosine triphosphatase (ATPase) activity of cell membrane in essential hypertensive (EH) patients and essential hypertension patients complicated with cerebral infarction (HCI). Methods: Twenty healthy individuals, 30 EH patients and 30 HCI patients were selected as subjects. The erythrocyte deformability indexes (DI)、 Na+, K+-ATPase and Ca2+ATPase activities were examined. Results: (1) EH patients had significantly higher DI, lower ATPase activity as compared to healthy individuals. There were significantly negative correlation between DI and ATPase activity, and a significantly positive correalation between DI and diastolic blood pressure in EH patients; (2) There was significantly higher DI, lower ATPase activity in HCI patients than those in EH patients. There was significantly negative correlation between DIand ATPase activity in HCI patients. Conclusion: (1) RCD decreases in EH patients, and RCD is correlated to the decreased ATPase of cell membrane and elevated blood pressure; (2) The decreased RCD level may be related to the occurrence of HCI.

Objective The purpose of this study was to evaluate the effects and mechanism of ACEI(Fosinopril),AT1 receptor antagonism (Irbesartan),and combination of these two drugs on ventricular remodeling in rats with myocardial infarction.Methods Rats were randomly divided into four groups at twenty-four hours after MI,and treated for 6 weeks.Mean blood pressure and left ventricular end diastolic pressure(LVEDP) were evaluated,as well as ventricular weight(VW)/body weight(BW) ratio.The total,type I and type Ⅲcollagen and nonmyocyte cellular proliferation were quantified by histomorphometry.The expression of transforming growth factor-beta 1(TGF-? 1)mRNA within the noninfarction zone was determined by in situ hybridization.Results Irbesartan and combination therapy decreased total collagen more significantly compared with fosinopril.Combination therapy decreased typeⅠcollagen more significantly than fosinopril.Nonmyocyte cellar proliferation in MI-combination group was more significantly suppressed than in MI-fosinopril group.Treatment with irbesartan or combination therapy normalized TGF-? 1 mRNA level within the noninfarction zone.Conclusion Fosinopril or irbesartan alone ,and combination of these two drugs can limit myocardial hypertrophy,attenuate the development of myocardial interstitial fibrosis,and prevent nonmyocyte cellar proliferation in the noninfarcted left ventricle.The use of irbesartan,especially combined with fosinopril was more effective than fosinopril alone in the suppression of histopathologic changes resulting in ventricular remodeling after MI.Irbesartan and combination therapy was more effective than fosinopril alone in suppressing TGF-? 1 mRNA expression.

BACKGROUND: The pathological change of femoral head was observed after treating necrosis with core decompression and autogenous iliac bone implantation, expected to obtain a better understanding of the prognosis of autogenous iliac bone implantation method.OBJECTIVE: To explore the curative effect of the ischemic necrosis of femoral head filling the hole of the core decompression with autogenous iliac bone implantation in animal models. DESIGN, TIME AND SETTING: Animal trial observation. The experiment was performed at the Central Laboratory of the Guilin Medical University from April 2006 to September 2007.MATERIALS: Nine hybrid adult dogs were prepared for necrosis of femoral head models.METHODS: The ischemic necrosis of femur head was made with the liquid nitrogen in dogs. The rod-shape autogenous cancellous bone that comes from the posterior superior iliac spine was driven into the full depth of the core r decompression tunnel to the subchondral bone. The dogs were divided into 3 groups, 3 dogs in each groups were sacrificed respectively at 3, 6, 12 weeks after operation. Radiograph and histological examination were used to evaluate the results.MAIN OUTCOME MEASURES: Histological changes of the femoral head necrosis and bone graft at the weeks 3, 6 and 12.RESULTS: No collapse of femoral head was observed at the 3 weeks after operation. The graft as well as perivascular tissues showed necrosis with empty lacune. Fiber granulation tissues could be seen ingrowth of capillaries and perivascular tissues into the bone graft. At 6 weeks after operation, basophilia blue area and new born osteoblast, cartilage, as well as chondroblasts zone could be found at the surface of bone trabecula. After 12 weeks of operation, new bone formation, representing typical process of "creeping substitution". And the cancellous bone of necrotic femoral head was rebuilt gradually. CONCLUSION: Core decompression combined with implantation of autogenous iliac bone implantation can accelerate femoral head repairing, delay or prevent femoral head from necrosis.

OBJECTIVE To carry out "Occupation Exposition Risk Guard" curriculum practice in high rank nursing and discuss the value of built this curriculum in senior professional school.METHODS The skin damage and after-damage processing were investigated by questionaire before and after this curriculum.RESULTS People not accepted this curriculum had skin damage of 96.25%,after-damage processing rate of 36.25%,and reporting rate of 20.00%,vs 70.00%,100.00% and 87.5% in but people who accepted this curriculum.CONCLUSIONS In the process of training the education of occupation exposition protection knowledge has important value.

Objective: To prepare the monoclonal antibodies against polycystin 1 intracellular region and to study the distribution and expression of polycystin 1 in kidney tissues. Methods: Using the recombinant fusion protein containing polycystin 1 intracellular region as antigen, the hybrid cells secreting the monoclonal antibodies against polycystin 1 intracellular region were established by hybridoma technique. The distribution and expression of polycystin 1 in polycystic kidney, fetal kidney and adult kidney were investigated by immunohistochemical methods(standard EnVision method) with the monoclonal antibodies. Results: Four cell lines of hybrids steadily secreting the monoclonal antibodies against polycystin 1 intracellular region were established. The antibody titers were 1∶10 6. The 50th generation of these cell lines of hybrids still can secret the monoclonal antibodies and the titers remain similar. Polycystin 1 was weakly expressed in tubules and collecting ducts of normal kidney, the strong staining was seen at tubules of fetal kidney, and very strong staining of cyst lining epithelium of polycystic kidney was observed. Conclusion: The monoclonal antibodies against polycystin 1 intracellular region will be a useful tool in the studies of polycystin 1 structure and function.

Objective To evaluate the efficacy of continuous positive airway pressure (CPAP)-based standard treatment on obstructive sleep apnea-hypopnea syndrome (OSAHS) patients with type 2 diabetes and insulin resistance (IR) in the elderly.Methods 63 elderly type 2 diabetes patients diagnosed as OSAHS were randomly divided into control group (n =31) and CPAP group (n =32).Patients in control group were treated with conventional therapy including diet control,exercise and antidiabetic drugs,and patients in CPAP group were treated with CPAP treatment combined with conventional therapy.Fasting glucose (FBG),oral glucose tolerance test (OGTT),homeostasis model assessment of IR index (HOMA-IR),body mass index (BMI),apnea-hypopnea index (AHI),lowest oxygen saturation (L-SaO2) and the dosage of insulin application were observed after 7 days,1 month,3 months of the treatment.Glycosylated hemoglobin (HbA1c) was determined before and after 3 months of the treatment.Results In CPAP group,levels of FBG and 2 h OGTT glucose,HOMA-IR,AHI,daily insulin dosage were significantly reduced and L-SaO2 was significantly increased after 7 days of the treatment; BMI was significantly reduced after 1 month of the treatment;HbA1c level was significantly reduced after 3 months of the treatment.In control group,L-SaO2 was significantly reduced along with the multiple time points; daily insulin dosage was significantly increased after 3 months of the treatment.There were no significant differences in all observed indicators between groups before treatment.There were significant differences in the observed indicators between groups after treatment except for BMI after 7 days of the treatment.Conclusions Compared with conventional therapy,CPAP-based standard treatment has more efficacy on increasing insulin sensitivity and improving insulin resistance in elderly patients with OSAHS and type 2 diabetes.

Objective:To investigate the relationship between vulnerability of mouse coronary artery plaque and downstream myocardial perfusion and myocardial strain.Methods:Thirteen ApoE knockout mice with stable coronary plaques (stable plaque group)and 13 ApoE knockout mice with vulnerable coronary plaques(vulnerable plaque group) were selected as the experimental group, and 15 sex- and age-matched C57BL/6 mice with the same genetic background as ApoE mice were chosed as the control group. Myocardial contrast echocardiography (MCE) was carried out to quantify regional myocardial perfusion at rest and during adenosine stress using a Vevo 2100 system (Visual sonics). Replenishment curves of myocardial contrast were obtained, and rates of signal rise (β) and plateau intensity (A) were recorded. MBF was estimated by the product of A and β. Speckle tracking imaging combined with adenosine stress test was used to evaluate the longitudinal strain of left ventricular myocardium in mice. The vulnerability of the plaque was assessed by histopathology in serial tissue sections of proximal and middle left coronary artery according to the previously reported method.Results:There were no significant differences in body weight, heart rate, left ventricular end diastolic volume, left ventricular end systolic volume, left ventricular mass and ejection fraction among the three groups( P>0.05). The levels of serum triglyceride, total cholesterol, high density lipoprotein and low density lipoprotein in stable plaque group and vulnerable plaque group were significantly increased when compared with those in control group (all P<0.05). The pathological results showed that the coronary luminal stenosis rates in the stable plaque group and the vulnerable plaque group were (74.3±4.9)% and (75.5±7.1)% respectively, with no significant difference between the two groups( P>0.05). MBF of the middle anterior septum and left ventricular posterior wall in the experimental groups were significantly decreased when compared with that in the control group both in the resting status and during adenosine stress(all P<0.05). There were no significant differences in the MCE parameters between the stable plaque group and the vulnerable plaque group at rest( P>0.05). However, during adenosine stress, MBF of the vulnerable plaque group was decreased more significantly than that of the stable plaque group ( P<0.05). Compared with the control group, the values of longitudinal strain of the left ventricle in both experimental groups were decreased during resting status, without statistical significance (all P>0.05), but decreased significantly during adenosine stress and with more decrease in the vulnerable plaque group (all P<0.05). Conclusions:For the same degree of coronary artery stenosis in mice, the coronary artery vulnerable plaque group has less downstream myocardial perfusion and myocardial strain than the stable plaque group during adenosine stress. That is, the plaque vulnerability can affect the downstream myocardial perfusion and myocardial strain in the mouse model.

Objective To observe the early changes of related indexes after high dose of 60Co γ-ray irradiation on rhesus monkey hematopoietic system.Methods A total of 33 rhesus monkeys were randomly divided into normal control and different irradiation control group,rhesus monkeys in irradiation control group were given different doses(4,8,12 Gy) irradiation to establish acute radiation sickness(ARS) models.XE-2100 automatic blood cell analyzer detected the peripheral blood before and after the irradiation of 3,6,9,12,24,48,80 h.The rhesus monkeys were sacrificed to have a observation of sternum pathological changes at 6,48 and 80 h after 4,8,12 Gy 60Co γ-ray irradiation.Results The number of white blood cell in peripheral blood of the rhesus monkeys after 4 and 8 Gy 60Co γ-ray irradiation were lower than that before irradiation at 3 h after irradiation,as was significant increased at 6 h after irradiation,the highest values were 136.04%.and 221.38% after 9 h(with before irradiation values was 100.00%,the same below),become obviously drooped from 12 h after irradiation,show clearly temporary peak.But the number of white blood cell after 12 Gy 60Co γ-ray irradiation was significant increased at 6 h after irradiation,at the highest of 9 h,become obviously drooped from 12 h after irradiation.Peripheral blood neutrophile count was significant increased at 6 h after irradiation,at the highest of 9 h,become obviously drooped from 12 h after irradiation.Peripheral blood lymphocyte count fell sharply after irradiation,3 h detection value was only 12.02%-25.04% of before irradiation.Sternal bone marrow nucleated cell number decreased sharply after irradiation,the more irradiation dose,the less residual hematopoietic cells.Conclusion In the early stage of BM-ARS,temporary peaktime node of the white blood cell and neutrophil count could be regarded as the best delivery time of hematopoietic cytokine therapy.