Objective To evaluate the security of intravitreal injection with ciproflaxacin to retina. Methods Tweenty-four rabbits were randomly divided into 4 groups with 6 rabbits in each group. 0.1 ml ciproflaxacin in doses of 2 500, 5 000, and 10 000 ?g was intravitreally injected into the rabbits eyes, retrospectively. And 0.1 ml saline solution was injected into the vitreous body of the rats in the control group. Indirect microscope, light microscope and electroretinogram (ERG) were used to observe the changes of ocular fundus. Results Normal results of light microscopy and ultrastructure were found in 250 ?g and 500 ?g groups; irregularly arranged outer and inner nuclear layers, dropsical or even lost ganglion cells, and ultrastructural changes were in 1 000 ?g group. There was no apparent difference of ERG′s a and b amplitudes before and after intravitreal injection with ciproflaxacin in each group. Conclusion Intravitreal injection with ciproflaxacin is safe, and 500 ?g or less is the secure dosage in rabbits' eyes.

0.05),there was not statistically different before and after HIFU. However,the normal myometrium after HIFU enhanced obviously just as that before treatment. Conclusion MRI was useful for the evaluation of the intensity, volume changes and the blood supply in leimyomas before and after HIFU.

Objective: To study the effect of Shenxiong Xintong Pill(SXP) on cardiac hemodynamics. Methods: Parameters of cardiac hemodynamics were examined in anesthetic chest-opened dogs medicated with various doses of SXP. Results: After intraduodenal administration of SXP of 2.0g/kg, the coronary blood flow was raised, coronary resistance decreased, heart rate slowed and the left ventricular diastolic end pressure fallen in the dogs. No obvious changes were found in the contraction , works and ejection of left ventricle. Conclusion: The mechanism of SXP in relieving angina pectoris was probably related to the dilatation of coronary artery and increase of coronary flow with the increase supply of oxygen.

AIM: To investigate the effects of caveolin-1 (Cav-1) scaffolding domain peptide, cavtratin, on lipopolysaccharide (LPS)-induced mouse acute lung injury and heme oxygenase-1 (HO-1) activity.METHODS: Adult male BALB/c mice were randomly divided into 6 groups (n=8 to 10): control, Antennapedia internalization sequence (AP), LPS, LPS+hemin, LPS+ hemin+cavtratin and LPS+hemin+cavtratin+zinc protoporphyrin IX (ZnPP) groups.After LPS administration for 24 h, the lung pathological changes, the wet/dry weight (W/D) ratio of lung tissues, total cell number in bronchoalveolar lavage fluid and serum lactate dehydrogenase activity were measured.The co-localization of HO-1 and Cav-1 was displayed by immunofluorescence, and the HO-1 activity were detected.The mRNA expression of pro-inflammatory cytokines IL-1β, IL-6, TNF-α, MCP-1 and iNOS was detected by real-time PCR.RESULTS: The mice in LPS+hemin+cavtratin group had the decreased interaction between HO-1 and Cav-1, and the increased HO-1 activity compare with LPS group (P<0.05).Compared with LPS group, the pulmonary damage was attenuated in LPS+hemin+cavtratin group, and the injury indexes, including W/D ratio, total cell number in bronchoalveolar lavage fluid and lactate dehydrogenase activity in the serum, and the mRNA expression of inflammatory cytokines all decreased (P<0.05).HO-1 activity inhibitor ZnPP abolished the above protective effect of cavtratin on the lung tissues with LPS-induced acute lung injury.CONCLUSION: Cavtratin has beneficial effects on the lung with LPS-induced acute injury by restoring the HO-1 activity.

Objective:To compare the durability of resin-based root-surface coating material and all-in-one self-etching adhesive on root surface in vitro.Methods:Human extracted premolars or molars with intact roots were selected.The cementum was removed using a periodontal scaler to expose root dentin. The root surface was coated with an acid-resistant nail varnish,leaving a window of 3 mm ×3 mm on the exposed dentin.The window was covered with either PRG Barrier Coat (PRG)or Clearfil S3 Bond (CS3).After water aging for 14 d,specimens were immersed in acid buffer at pH 4.5 for 4 d and the demineralization buffer was changed every 24 h.Then the specimen was split longitudinally through the center of the ‘window’and the cross-sectional surface was observed with scanning electron microscope (SEM).After fixed and dehydrated,the prepared samples were coated with platinum.The coating mate-rial,root dentin and the interface was observed by scanning electron microscope (SEM).The thickness of the coating material was measured on the SEMimages.Regarding toothbrush wear test,coronal dentin-disks were prepared and covered with PRG and CS3,respectively.After storage in water for 24 h,the specimen was subjected to the toothbrush wear tester for 100,200,300,500,700,1 500 brushing cy-cles.A slurry of fluoride toothpaste (1 ∶2 ratio of toothpaste and deionized water by weight)was used and the brushing load was 300 N.The surface microstructure of remaining coating material was analyzed using SEM.The wear depths were determined by a profilometer.Statistical analysis was performed with SPSS 20.0 by one-way ANOVA.The level of significance was at 0.05.Results:Application of PRG Barrier Coat produced a coating layer of (47.1 ±27.3)μm,while CS3 presented a thin film of (5.7 ± 2.1)μm in thickness.The exposed dentin was hermetically sealed and no obvious gap was observed at the interface in both PRG and CS3 groups.There was no dentin demineralization observed in both groups after water aging.The wear depths of PRG and CS3 increased along with the numbers of brushing cycles. PRG wore at a significant lower pace than CS3 did (P <0.05).Conclusion:PRG coating resin had similar performances as CS3 on protecting root dentin from demineralization after water aging.What’s more,PRG demonstrated a higher toothbrush wear resistance than CS3.We concluded that PRG Barrier Coat contained S-PRG filler may be an effective coating material for protecting exposed root from both chemical and mechanical challenges.Further studies should be carried out to evaluate the long-term reli-ability of the rootsurface coating materials under the clinical setting.

OBJECTIVE: To evaluate the clinical efficiency of recombinant adenovirus p53 injection (rAd-p53) combining chemotherapy in the treatment of malignant body cavity effusion. METHODS: 50 cases with malignant body cavity effusion were randomly divided into 2 groups. The treatment group were given intracavitary administration of rAd-p53 1 ? 1012VP after puncture drainage, 48h later which were given intracavitary administration of 60mg/m2 cisplatin once a week for 3～4 weeks. The control group was given the same intracavitary therapy as the treatment group but without rAd-p53 therapy. RESULTS: The total effective rates of the treatment group and the control group were 85.7% and 51.7%(P

Objective To compare and evaluate the efficacy of three operating procedures to produce permanent rat models of cerebral ischemia, including mortality, neurological evaluation score, infarction volume of ischemia and time consumed in the operation. Methods The rats were randomly divided into three groups. Group 1: The common carotid artery (CCA) and external carotid artery (ECA) were ligated during the operation and ICA was clipped temporarily by artery clamp. Group 2: The CCA and ECA were ligated and the superior thyroid artery and pterygopalatine artery were exposed but not ligated. Silk suture was utilized to hang the internal carotid artery (ICA). Plastic suture was inserted into ICA and stepped over the initiation point of pterygopalatine artery under microscopic observation. Group 3: The CCA and ECA were ligated and ICA was hanged with a silk suture, and the pterygopalatine artery was not exposed, but during the period of inserting plastic suture, the proximal part of the suture was pressed to make the suture's round distal end elevated, and then pass the initial point of pterygopalatine artery. Mortality, neurological score, volume of ischemic infarction and operation time consumed of the three groups were compared after the operation. Results The procedure to prepare the model was most efficient in the group 3, taking only 17.5 min to complete, significantly less than that in the group 1 (50 min) and group 2 (40 min), (P<0.05), and with a lower mortality and more steady neurological evaluation score and infarction volume. Conclusion The use of the third operating method can shorten the operation time and improve the efficacy of operation. Using this method, more consistent and repetitive focal cerebral ischemia models can be produced effectively, and meet the demands of clinical trials.

Objective To observe the mechanisms of autophagic eukaryotic cells in Acinetobacter microvilli removal and protein histological study on apoptosis induced by macrophages .Methods A model of Acinetobacter baumannii infection was established in 24 female OCR mice .The mice were randomly divided into control group (n= 12) and observation group (n= 12) .The control group was injected with normal saline ,and the observation group was injected with autophagy eukaryotic cells ,the histopathological changes of Acinetobacter and the induction of macrophage apoptosis were observed .Results There was no significant difference in the bacterial counts between the two groups of mice immediately after implantation (P>0 .05) ,the bacterial counts in the 24 and 48 h in the observation group was significantly lower than that in the control group (P<0 .05) .The lung tissue of mice in the ob-servation group injected after autophagy was normal ,the alveolar cavity was open ,no abnormal substances were found ,the alveolar wall was not obviously thickened ,and no inflammatory cell infiltration was found in the wall .The mice in the control group were in-jected with normal saline and lacked the ability to remove Acinetobacter ,resulting in a large number of inflammatory cell infiltra-tion ,vasodilatation ,and congestion in some mice .Conclusion Autophagic eukaryotic cells injected with Acinetobacter baumannii can increase the clearance rate ,induce apoptosis of macrophages and improve the quality of Acinetobacter baumannii .

Spinal nerve injury causes mechanical allodynia and structural imbalance of neurotransmission, which were typically associated with calcium overload. Storeoperated calcium entry (SOCE) is considered crucial elements-mediating intracellular calcium homeostasis, ion channel activity, and synaptic plasticity. However, the underlying mechanism of SOCE in mediating neuronal transmitter release and synaptic transmission remains ambiguous in neuropathic pain. Neuropathic rats were operated by spinal nerve ligations. Neurotransmissions were assessed by whole-cell recording in substantia gelatinosa. Immunofluorescence staining of STIM1 with neuronal and glial biomarkers in the spinal dorsal horn. The endoplasmic reticulum stress level was estimated from qRT-PCR. Intrathecal injection of SOCE antagonist SKF96365 dose-dependently alleviated mechanical allodynia in ipsilateral hind paws of neuropathic rats with ED 50 of 18 μg. Immunofluorescence staining demonstrated that STIM1 was specifically and significantly expressed in neurons but not astrocytes and microglia in the spinal dorsal horn. Bath application of SKF96365 inhibited enhanced miniature excitatory postsynaptic currents in a dosage-dependent manner without affecting miniature inhibitory postsynaptic currents. Mal-adaption of SOCE was commonly related to endoplasmic reticulum (ER) stress in the central nervous system. SKF96365 markedly suppressed ER stress levels by alleviating mRNA expression of C/ EBP homologous protein and heat shock protein 70 in neuropathic rats. Our findings suggested that nerve injury might promote SOCE-mediated calcium levels, resulting in long-term imbalance of spinal synaptic transmission and behavioral sensitization, SKF96365 produces antinociception by alleviating glutamatergic transmission and ER stress. This work demonstrated the involvement of SOCE in neuropathic pain, implying that SOCE might be a potential target for pain management.

Objective:To observe the dynamic of neurological severity scores (NSS) and the expressions of Wnt/β-catenin signaling pathway, brain-derived neurotrophic factor (BDNF) and nerve growth factor (NGF) in rats with severe traumatic brain injury (sTBI), and to explore the effect of Huoxue Huayu decoction.Methods:A total of 126 Sprague-Dawley (SD) rats were randomly divided into seven groups by random number table with 18 rats in each group, namely control group (normal saline 2 kg/L), model group (normal saline 2 kg/L), brain protolysate group (BP group, 5.6 g/kg), Taohong Siwu decoction group (TH group, 10.2 g/kg), Xuefu Zhuyu decoction group (XF group, 15.6 g/kg), Tongqiao Huoxue decoction group (TQ group, 9.6 g/kg) and Buyang Huanwu decoction group (BY group, 28.7 g/kg). The sTBI rat model was reproduced by modified Feeney free fall method, and the rats in the control group were not treated with trauma. The rats in each group were intragastrical administered with corresponding drugs at 6 hours after injury, and the NSS scores were evaluated on the 1st, 3rd and 7th days after injury. After the hippocampus was harvested, the mRNA expressions of Wnt3a and β-catenin were detected by reverse transcription-polymerase chain reaction (RT-PCR), and the positive expressions of BDNF and NGF were detected by immunohistochemistry.Results:Compared with the control group, the rats in the model group showed obvious symptoms of craniocerebral injury at 1 day after injury, which was manifested as significantly increased NSS score, up-regulated mRNA expressions of Wnt3a and β-catenin, and increased positive expressions of BDNF and NGF, which indicated that the sTBI rat model was successfully prepared and presented a certain self-repair ability with the extension of time. Compared with the model group, NSS scores in the XF group, TQ group and BY group significantly decreased at 1 day after injury (6.6±1.5, 6.1±2.0, 5.7±2.4 vs. 9.4±1.5, all P < 0.05); however, the NSS scores in the BP group and TH group decreased significantly at 7 days after injury, and the NSS scores in the TQ group and BY group decreased more significantly than those in other drug groups. Compared with the model group, mRNA expressions of Wnt3a and β-catenin in the hippocampus of the BP group increased significantly at 1 day and 3 days after injury, respectively, and continued to increase with the extension of time. The mRNA expression levels of Wnt3a and β-catenin in the four groups of Huoxue Huayu decoction fluctuated to varying degrees from 1 day to 3 days after injury, but they were significantly higher than those in the model group at 7 days after injury, and the increase was more significant in the BY group [Wnt3a mRNA (2 -ΔΔCt): 154.7±4.1 vs. 17.4±1.0, β-catenin mRNA (2 -ΔΔCt): 17.05±0.45 vs. 2.74±0.13, both P < 0.05], and the second was the TQ group [Wnt3a mRNA (2 -ΔΔCt): 126.6±2.8 vs. 17.4±1.0, β-catenin mRNA (2 -ΔΔCt): 8.70±1.19 vs. 2.74±0.13, both P < 0.05]. Compared with the model group, the positive expressions of BDNF and NGF in the BP group increased significantly at 1 day after injury, but decreased after 3 days after peak. The positive expressions of BDNF and NGF in the four Huoxue Huayu decoction groups fluctuated to varying degrees from 1 day to 3 days after injury, but they were significantly higher than those in the model group at 7 days after injury, among which, the positive expressions of BDNF and NGF in the TQ group and BY group were significantly higher than those in the model group at 1 day after injury [BDNF positive cells (cells/MP): 56.4±6.2, 61.6±7.0 vs. 37.4±2.0, NGF positive cells (cells/MP): 58.4±5.0, 62.4±4.4 vs. 53.4±3.6, all P < 0.05], the increase amplitude at 7 days after injury was more significant than those in the other groups. Conclusions:Taohong Siwu decoction, Xuefu Zhuyu decoction, Tongqiao Huoxue decoction and Buyang Huanwu decoction have curative effect on the nerve regeneration and repair of rats with sTBI at acute stage, but the intensity of the effect is different. Buyang Huanwu decoction and Tongqiao Huoxue decoction have a fast and better effect.