Adult ; Faculty ; Female ; Humans ; Male ; Middle Aged ; Voice ; Voice Disorders ; epidemiology

Objective To investigate the effects of dexamethasone on the airway development and vasculogenesis in cultured human fetal lung exposed to hyperoxia.Methods Human fetal lung at the pseudoglandular stage of development were cultured either in normoxia(21%O2,5%CO2)or hyperoxia(95%O2,5% CO2)for 72 hours.Dexamethasone was added into the culture medium at the concentration of 10-6 mol/L.Whereas ethanol at the same concentration was as control.Harvested tissue wss stained for pancytokeratin to I dentify epithelial cells.CD31 aS a specific antibody of endothelial cell.The effects of lung morphometry were analyzed using computer-assisted image analysis software to ealeuhte the thickness of airways,surface area occupied by airways and the distance of vessels to the nearest airway as well as the surface area of blood vessels.Results The lung architecture remained largely unchanged in normoxia for 72 hours culture,whereas hyperoxic culture of lungs resulted in significant dilation of airways and thinning of epithelium.The surface area occopied by airways increased significantly(P＜0.05).The blood vessels in interstium were more close to the airway epithelium in the hyperoxic lung(50 μm)as compared with normoxia group.Meanwhile,the proportion of the blood wessels in interstium of hyperoxia group(4.0%)Was higher than those of normoxia group (4.2%)and hyperoxia with dexamethasone(5.4%)(P＜0.05).Dexamethasone has the protective effect on lungs exposed tO hyperoxia.Conclusion Our resulta showed that hyperoxia resulted in the simple airways and the decreased bkxxl vessel density in interstitium of cultared human fetal lung.Dexamethasone has protective effect on fetal lungs exposed to hyperoxia and can promote lung mature.

Objective To study the hypoglycemic effect of polysaccharide from stigma maydis and to explore its therapeutic mechanism preliminarily.Method The diabetes mice models were induced by tetraoxypyrimidine.The concentration of blood sugar was determined by glucose oxidase test.The influence of the stigma maydis polysaccharide on glycometabolism and its repair effect on damaged glycometabolism organs of diabetic mice were observed respectively by content determination of glycogen and by the measurement of activities of relative enzymes(superoxyde dismutase and glutathione peroxidase).Results The stigma maydis polysaccharide could decrease the blood sugar,promote the synthesis of glycogen and repair the damaged glycometabolism organs of diabetic mice.Conclusion The stigma maydis polysaccharide exhibits a good therapeutic effect on diabetic mice,and has a good development prospect.

This study sought to reveal the difference of brain functions at resting-state between subjects with sub-health and normal controls by using the functional magnetic resonance imaging (fMRI) technology. Resting-state fMRI scans were performed on 24 subjects of sub-health and on 24 healthy controls with gender, age and education matched with the sub-health persons. Compared to the healthy controls, the sub-health group showed significantly higher regional homogeneity (ReHo) in the left post-central gyrus and the right post-central gyrus. On the other hand, the sub-health group showed significantly lower ReHo in the left superior frontal gyrus, in the right anterior cingulated cortex and ventra anterior cingulate gyrus, in the left dorsolateral frontal gyrus, and in the right middle temporal gyrus. The Significant difference in ReHo suggests that the sub-health persons have abnormalities in certain brain regions. It is proved that its specific action and meaning deserves further assessment.
Brain ; physiology ; physiopathology ; Brain Mapping ; Case-Control Studies ; Cerebral Cortex ; Frontal Lobe ; Gyrus Cinguli ; Humans ; Magnetic Resonance Imaging ; Parietal Lobe

The Her-2 proto-oncogene encodes a 185kDa transmenbrane glycoprotein p185 which has intrinsic tyrosine kinase activity. It is overexpressed in several malignant human tumors like breast cancer. A chimeric antibody by assembling a single-chain Fv antibody and a human IgG1 Fc fragment was constructed. This chimeric antibody reacts with tumor surface antigen p185c-erbB-2 specifically. In order to put the antibody into clinical application, two steps purification method was used to attain the antibody’s purity more than 95%. Both the lyophilized pharmaceutical formulations of the antibody were found. The formulations can keep the stability and activity of the antibody for at least one year. These results were the foundation of the chimeric antibody for cancer therapy.

Objective To investigate the effects of Aktl gene knockout on pain behavior induced by chronic constriction injury model of sciatic nerve (CCI).Methods C57BL/6 male mice were randomly divided into Akt1 knockout group (KO group,n=12),wild type group(WT group,n=12).All mice were made model of CCI in the right sciatic nerve.Each mouse received tests of the paw withdrawal mechanical threshold (PWMT) and the paw withdrawal thermal latency(PWTL) at the times of 1d before and 1 d,3 d,5 d,7 d,10 d,14 d,17 d,21 d after surgery.Results For both KO group and WT group,the basic values of PMWT(right(0.89±0.15)g,(0.87±0.15)g; left(0.97±0.19) g,(1.05±0.14) g,P＞0.05) and PWTL(right (7.64±0.71) s,(7.56±0.68) s ;left: (7.67±0.6) s,(7.64±0.64) s,P＞0.05) showed no significantly statistical difference.Compared with WT group and the basic value,PWMT and PWTL were significantly decreased after surgery in KO group (P＜0.05).The PWMT and P WTL of the left paw in KO group and WT group had no obvious statistical difference (P＞0.05).However,the PWMT and PWTL of the right paw significantly decreased in the two groups compared with left paw.Conclusion h aggravates the neuropathic pain induced by CCI in mice when the Akt1 gene was knocked out.

BACKGROUND: Preliminary experimental study found that the human amniotic mesenchymal stem cells (hAMSCs)transplantation can improve nerve injury symptoms of rats with cerebral infarction.OBJECTIVE: To observe the survival, colonization and differentiation of hAMSCs in the infarct area of cerebralinfarction rats.METHODS: Sixty Sprague-Dawley rats were randomly assigned into hAMSCs transplantation, model or shamoperation groups (n=20/group). Animal models of middle cerebral artery occlusion were produced in the model andtransplantation groups by Zea-Longa method. One day after modeling, rats in the hAMSCs transplantation groupwere given in situ transplantation of 10 μL of hAMSCs (2×106) into the damaged striatum and cortex, while those inthe model and sham operation group were given the same volume of PBS. Within 1 week after transplantation, ratneurological defects were assessed and changes in their body mass were continuously monitored. Two weeks aftertransplantation, TTC staining was used to observe cerebral infarct size, hematoxylin-eosin staining was used forpathological observation of brain tissues, and immunofluorescent staining was used to detect expression ofneuron-specific nuclear protein.RESULTS AND CONCLUSION: With time, weight loss was increased while neurologic deficit scores were graduallyreduced in the hAMSCs and model groups. Compared with the model group, the weight loss and neurologic deficitscores were lower in the hAMSCs group,; however, there was a significant difference in the neurologic deficit scoresbut not in the weight loss between the two groups. Additionally, the hAMSCs significantly reduced infarct size,attenuated pathologic injury, and decreased the number of inflammatory cells. Immunofluorescence stainingshowed that the hAMSCs were observed at 1 week after transplantation under inverted luorescence microscope,and gradually differentiated into nerve cells at 2 weeks after transplantation. In conclusion, transplanted hAMSCsmay migrate to and survive in the cerebral infarct region, and differentiate into nerve cells in situ in rats with cerebralinfarction.

AIM: To investigate the refractive distribution and analysis risk factors for aircrew ametropia.
METHODS: The number of 49 cases with ametropia from 1031 aircrew during May 2013 to May 2014 were reviewed. Various types of refraction composition, age, type, position, time of flight with the subjective assessment of aircrew were analyzed and compared.
RESULTS:Of 49 cases, 43 cases (88%) were myopia, 6 cases ( 12%) were hypermetropia. , Detection rates were higher in age over 50 years aircrew and flight time more than 3000h. Detection rates were lower in self-conscious symptom heavy aircrew, fighter aircrew and good habit of using eyes.
CONCLUSION: The myopia incidence in aircrew with age >50 years and long flight time is higher, than that of fighter pilots and good habit of using eyes. We should pay attention to the increasing late-onset myopia of aviators and habit of using eyes, work intensity and time of using eyes about aircrew.

Rhynchophylla is a Chinese herb commonly used in clinical practice. It's also the primary herb of some famous Chinese herbal compound such as Tianma Gouteng decoction, and Lingyang Gouteng decoction. According the record from many previous materia medica literatures, rhynchophylla should be added later during decoction. Pharmaceutical research showed that rhynchophylla alkaloids were not stable. Which has resulted in many problems in the research and its application. For example, there was not a quantitative determination method in "Chinese Pharmacopoeia" of past and present versions, which seriously impacted its quality control and product application. Firstly, records from previous materia medica literatures and "Chinese Pharmacopoeia" were systematically sorted based on the chemical stability of rhynchophylla. Secondly, pharmaceutical research including chemical compositions and their stability, pharmacological effects, extraction process and quality analysis, was reviewed after reference of literatures published at home and abroad in recent decades. Positive reference and evidence for further research and development of rhynchophylla will be provided in the article.
Animals ; Drug Stability ; Drugs, Chinese Herbal ; chemistry ; pharmacology ; Humans ; Quality Control ; Uncaria ; chemistry

Objective To investigate the effects of exogenous biliverdin on lung injury induced by brain death (BD) in rats. Methods Twenty-three adult male Wistar rats in which Fogarty balloon catheter was successfully inserted into cranial cavity were randomly divided into 3 groups: group Ⅰ sham operation (group S,n = 7); group Ⅱ brain death (group BD, n = 8) and group Ⅲ biliverdin + BD (group B, n = 8). The animals were anesthetized, intubated and mechanically ventilated. Femoral artery and vein were cannulated for MAP monitoring and drug and fluid administration. Brain death was induced by injecting slowly normal saline into the balloon in group Ⅱ and Ⅲ. BD was confirmed by dilated and fixed pupils, apnea, transient hypertension and EEG changes. In group Ⅲ biliverdin 35 mg/kg was injected intraperitoneally as soon as BD was confirmed. The animals were mechanically ventilated for another 1.5 h during which MAP was maintained at 80-120 mm Hg by iv norepinephrine infusion. Arterial blood samples were obtained before anesthesia, immediately before and at 5, 30,60, 90 min after intraperitoneal biliverdin for blood gas analysis and determination of plasma bilirubin concentration. PaO2/FiO2 was calculated. The animals were sacrificed at 1.5 h after biliverdin administration. The left lung was removed for detection of MDA content, SOD activity, total antioxidant capacity, cell apoptosis and biliverdin reductase expression in lung tissue. Results Brain death significantly decreased PaO2/FiO2, lung SOD activity and total antioxidant capacity and increased lung MDA content and apoptosis as compared with sham operation group. IP biliverdin significantly attenuated BD-induced lung injury in group B as compared with group BD. The plasma bilirubin concentration and biliverdin reductase expression were significantly higher in group B than group BD. Conclusion Exogenous biliverdin can attenuate BD-induced lung injury by inhibiting pulmonary oxidative stress response and apoptosis.