AIM: To explore the long-term efficacy of Q-factor guided laser epithelial keratomleusis ( LASEK ) for myopia and astigmatism with positive Q-factor.
METHODS: There were 158 eyes which were myopia and astigmatism with positive Q- factor taken in two groups randomly: 86 eyes accepted Q - factor guided LASEK as observation group and 72 eyes accepted routine LASEK as control group. The difference between the two groups about all data was similar. The uncorrected visual acuity ( UCVA ) and the best corrected visual acuity ( BCVA ) as well as diopter, ocular tension, corneal topography, Keratometry value K, aspherical factor Q, Higher-order aberrations ( HOA ) , corneal thickness by ultrasound and, contrast sensitivity ( CS ) , Haze were examined and compared before and after surgery. All the cased were followed up for 14d, 1, 3, 6, 12mo. And there were no statistical difference among the data before surgery.
RESULTS: After 12mo there were no statistical difference between the two groups about UCVA and BCVA. But the safety index of observation group was 1.10, that of control group was 1. 07. The validity index of observation group was 1. 06, that of control group was 0.99. The HOA of observation group was 0. 45±0. 17μm, and that of control group was 0. 72±0.25μm, there was statistically significant difference (t=-8. 193,P=0. 000). Q factor of observation group was 0. 41±0. 17, that of control group was 0. 77±0. 22, there was significant difference (t=11. 377,P = 0. 028). The contrast sensitivity of 3mo post surgery of patients in the observation group returned to the level of before surgery. But in the control group the contrast sensitivity of the patients did not returned until 6mo.
CONCLUSION:Q-factor guided LASEK for myopia and astigmatism with positive Q-factor is stable, safe and effective. The operation allow for reducing the high order aberrations, maintaining the most asphericity of cornea, saving more in corneal tissue, which cause faster recovery of contrast sensitivity, less haze and better visual quality.

Objective To analyze the clinical features and common etiology of lung nodules in children. Methods The etiology, diagnosis, radiological features from 98 hospitalized children of lung nodules were analyzed. Results Of them, 58 were male and 40 were female aged from 0.2 years old to 14.8 years old. Pulmonary infection were found in 41 cases (41.8%) including tuberculosis in 15 cases (15.3%), pulmonary fungal infection in 13 cases (13.3%), pneumonia in 11 cases (11.2%), lung trematode in 2 cases (2.0%). Pulmonary metastases were found in 28 cases (28.6%), multiple pulmonary arteriovenous fistula in 1 case (1.0%), and pulmonary contusion in 1 case (1.0%) and unknown etiology in 27 cases (27.6%). Conclusions The etiology of lung nodules is complicated, in which infectious diseases are the most commonly seen, followed by pulmonary metastases. Biopsy is the golden standard of diagnosis.

Objective To evaluate the effect of the difficult embryo transfer on the clinical pregnancy outcome of in vitro fertili-zation-embryo transfer(IVF-ET) .Methods There were 209 fresh cycles of difficultly transferring and 2 489 fresh cycles of easily embryo transferring between January 2011 and December 2012 .The clinical outcome was compared .Results There were statistical-ly significant differences in the catheter blood staining rates (51 .20% vs 27 .68% ,P< 0 .05) ,implantation rate(31 .14% vs 35 . 54% ,P<0 .05) ,and clinical pregnancy rate (46 .41% vs 55 .56% ,P<0 .05)between the two groups .There was no significant difference in the rates of ectopic pregnancy and miscarriage between the two groups (P>0 .05) .Conclusion Difficulty ET will in-fluence the clinical pregnancy .Therefore ,all efforts should be made to avoid the difficult transfer in order to increase the pregnant rate .

Objective The influencing parameters of solid and fluid computing fields for the scaffolds models with regular square holes were discussed by nonlinear fluid-solid-coupling approaches.The numerical computational resuits of which the models were regarded as both rigid body and non-linear elasticity were compared as well.Method One direct fluid-solid-coupling approach and two indirect fluid-solid-coupling approaches were adopted,and the calculating reliability of three kinds of fluid-solid coupling methods was verified.Rasults The solid-fluidcoupling computational results are obtained in light of 12 kinds of scaffolds models which are constructed by 3 groups of square side length(50,100 and 150 μm)and 4 groups of porosity(61%,65%,77%and 84%).The field parameters of those solid models including stress,strain and displacement and those fluid models including static pressure,velocity,wall shear stress and strain rate are achieved and compared.Conclusion There appear some difference between the results of porous scaffold models as a rigid body and as non-linear elasticity.The different porosity with the same pore radius or the different pore radius with the same porosity would affect the field parameters of solid models and fluid models in varying degrees.

Objective The influencing parameters of solid and fluid computing fields for the scaffolds models with regular square holes were discussed by nonlinear fluid-solid-coupling approaches.The numerical computational resuits of which the models were regarded as both rigid body and non-linear elasticity were compared as well.Method One direct fluid-solid-coupling approach and two indirect fluid-solid-coupling approaches were adopted,and the calculating reliability of three kinds of fluid-solid coupling methods was verified.Rasults The solid-fluidcoupling computational results are obtained in light of 12 kinds of scaffolds models which are constructed by 3 groups of square side length(50,100 and 150 μm)and 4 groups of porosity(61%,65%,77%and 84%).The field parameters of those solid models including stress,strain and displacement and those fluid models including static pressure,velocity,wall shear stress and strain rate are achieved and compared.Conclusion There appear some difference between the results of porous scaffold models as a rigid body and as non-linear elasticity.The different porosity with the same pore radius or the different pore radius with the same porosity would affect the field parameters of solid models and fluid models in varying degrees.

Objective To observe the therapeutic effects of astragalus membranaceus parenteral solution on the elders with cerebral infarction and its influences on patients' nerve function,activities of daily living and hemorheology. Methods Ninety-two patients diagnosed with cerebral infarction who were older than 60 years were randomly divided into astragalus membranaceus group(n=50) and control group (n=42). The two groups were treated with conventional therapy. But based on conventional therapy, astragalus membranaceus parenteral solution (30 mL, 2 g/mL) added into 5%glucose saline was used in the astragalus membranaceus group once daily for 4 weeks. The clinical therapeutic effects, nerve function, ability of activities of daily living and hemorheology were compared between the 2 groups. Results The total effective rate of the astragalus membranaceus group was not significantly different from that of the control group (P＞0.05), while the excellent rate and therapeutic effects of the astragalus membranaceus group was significantly higher than that of the control group (P＜0.05). Compared with control group, the scores of the neurologic impairment were decreased significantly(P＜0.05), Barthel index was increased significantly (P＜0.05), whole blood viscosity, hematocrit and fibrinogen were decreased significantly (P＜0.05) in the astragalus membranaceus group. Conclusions Astragalus membranaceus parenteral solution can improve nerve function and the ability of activities of daily living of the gerontal cerebral infarction patients.

Objective To investigate the imaging changeof cerebral ischemireperfusion injury (CIRI) afteinterventional therapy in acute middle cerebral artery occlusion .Method32 patientwith acute middle cerebral artery occlusion in ouhospital from January 2013 to Novembe2014 were selected .16 casewere performed the recanalization therapy aftearterial thrombolysiand/omechanical thrombectomy(recanalization group) and 16 casewere notreated by thrombolytitherapy (non-recanalization group) .The differenceof brain imaging changes(onse,on 3 ,7 d afteonset) were analyzed and compared between the two group. ResultThe proportion of lateral ventricle compression degree and the shifdegree of brain midline on 3 d afteonsein the reca-nalization group were greatethan those in the non-recanalization group ,the differencebetween the two groupwere statistically significant[0 .50 ± 0 .11 v.0 .58 ± 0 .10 ,0 .57(0 .18 ,0 .83)cm v.0 .22(0 ,0 .57)cm ,P＜0 .05] ,while which on 7 d of onsein the recanalization group were lesthan those in the non-recanalization group[0 .80 ± 0 .11 v.0 .55 ± 0 .12 ,0(0 ,0 .13) v.0 .46(0 , 0 .88)cm ,P＜0 .055] .Conclusion Although the interventional therapy ian importanmeasure foearly treatmenof ischemistroke ,buiaggravatethe early brain edem,therefore CIRI induced by the interventional therapy should be paid more attention to.

OBJECTIVETo establish a method for studying efficacious materials of traditional Chinese medicines from an overall perspective.

METHODCarthamus tinctorius was taken the example. Its major components were depleted by preparing liquid chromatography. Afterwards, the samples with major components depleted were evaluated for their antioxidant effect, so as to compare and analyze the major efficacious materials of C. tinctorius with antioxidant activity and the contributions.

RESULTSeven major components were depleted from C. tinctorius samples, and six of them were identified with MS data and control comparison. After all of the samples including depleted materials are compared and evaluated for their antioxidant effect, the findings showed that hydroxysafflor yellow A, anhydrosafflor yellow B and 6-hydroxykaempferol-3, 6-di-O-glucoside-7-O-glucuronide were the major efficacious materials.

CONCLUSIONThis study explored a novel and effective method for studying efficacious materials of traditional Chinese medicines. Through this method, we could explain the direct and indirect contributions of different components to the efficacy of traditional Chinese medicines, and make the efficacious material expression of traditional Chinese medicines clearer.

Alkalies ; chemistry ; Antioxidants ; chemistry ; Carthamus tinctorius ; chemistry ; Chromatography, High Pressure Liquid ; Drugs, Chinese Herbal ; chemistry ; Glucosides ; chemistry ; Mass Spectrometry

Objective • To investigate the mechanism of spinal chemokine C-C motif receptor 2 (CCR2)-mediated maintenance of bone cancer pain (BCP) in rats. Methods • Fifty-four SD rats were divided into BCP group, sham operation group, BCP+INCB3344 (CCR2 specific antagonist) group, and BCP+vehicle control group. Walker256 breast cancer cells were injected into the tibia medullary cavity of rats in the BCP group to establish the BCP model, while the rats in the sham operation group were injected with the same amount of saline. The rats in the BCP+INCB3344 group received intrathecal injection of INCB3344 on the 14th day after the establishment of BCP model, while the BCP+vehicle control group rats were injected with the same amount of vehicle. The mechanical pain thresholds of BCP group rats and sham operation group rats were measured to judge the success of BCP model. The expressions of CCR2 in the dorsal horn of spinal cord in the sham operation group rats and the BCP group rats were detected by Western blotting. The effects of intrathecal administration of INCB3344 on the mechanical pain threshold of BCP rats were observed by mechanical pain behavior test. Whole-cell patch-clamp recordings were used to investigate the differences of spontaneous excitatory postsynaptic currents (sEPSCs), α-amino-3-hydroxy-5-methyl-4-isoxazole-propionicacid (AMPA) and N-methyl-D-aspartic acid (NMDA)-induced currents of spinal substantia gelatinosa (SG) neurons of rats in the BCP group, the BCP+INCB3344 group and the BCP+vehicle control group. Results • Compared with the sham operation group, the mechanical pain threshold of BCP group rats reduced significantly on the 14th day after operation (P=0.000), and the expression of CCR2 in ipsilateral spinal cord of BCP group rats increased significantly (P=0.009). After intrathecal injection of INCB3344 for 4 h, the mechanical pain threshold of BCP+INCB3344 group rats was significantly increased (P=0.002). The frequency and amplitude of sEPSCs and the amplitude of AMPA and NMDA-induced currents in SG neurons of BCP group rats were significantly higher than those of the sham operation group rats (all P=0.000), while intrathecal administration of INCB3344 could significantly inhibit the above-mentioned indices in the BCP+INCB3344 group (all P<0.05). In addition, extracellular perfusion of INCB3344 could also significantly inhibit the frequency (P=0.001) and amplitude (P=0.020) of sEPSCs in SG neurons in BCP rats. Conclusion • CCR2 expressing in the spinal cord mediates the enhancement of excitatory synaptic transmission efficacy in the spinal dorsal horn of BCP rats by enhancing the functions of AMPA and NMDA receptors, which may be an important mechanism for the maintenance of BCP.

OBJECTIVETo construct lipL32/1-lipL41/1 fusion gene and its prokaryotic expression system and to determine frequencies of carrying and expression of lipL32 and lipL41 genes in L.interrogans wild strains and specific antibody levels in sera from leptospirosis patients.

METHODSlipL32/1-lipL41/1 fusion gene was constructed using linking primer PCR method and the prokaryotic expression system of the fusion gene done with routine techniques. SDS-PAGE was used to examine expression of the target recombinant protein rLipL32/1-rLipL41/1. Immunogenicity of rLipL32/1-rLipL41/1 was identified by Western blot. PCR and MAT were performed to detect carrying and expression of lipL32 and lipL41 genes in 97 wild L.interrogans strains. Antibodies against products of lipL32 and lipL41 genes in serum samples from 228 leptospirosis patients were detected by ELISA method.

RESULTSThe homogeneity of nucleotide and putative amino acid sequence of lipL32/1-lipL41/1 fusion gene were 99.9 % and 99.8 % in comparison with the reported sequences. Expression output of the target recombinant protein rLipL32/1-rLipL41/1, mainly present in inclusion body, accounted for 10 % of the total bacterial proteins. Both the rabbit antisera against rLipL32/1 and rLipL41/1 could combine to rLipL32/1-rLipL41/1. 97.9 % and 87.6 % of the L.interrogans wild strains had lipL32 and lipL41 genes, respectively. 95.9 % and 84.5 % of the wild strains were positive for MAT with titers of 1:4 - 1:128 using rabbit anti-rLipL32s or anti-rLipL41s sera, respectively. 94.7 % - 97.4 % of the patients'serum samples were positive for rLipL32s antibodies, while 78.5 % - 84.6 % of them were rLipL41s antibodies detectable.

CONCLUSIONlipL32/1-jlipL41/1 fusion gene and its prokaryotic expression system were successfully constructed. The expressed fusion protein had qualified immunogenicity. Both the lipL32 and lipL41 genes are extensively carried and frequently expressed by different serogroups of L.interrogans, and their expression products exhibit cross-antigenicity.

Antibodies, Bacterial ; blood ; Antigens, Bacterial ; genetics ; immunology ; Bacterial Outer Membrane Proteins ; genetics ; Cloning, Molecular ; Enzyme-Linked Immunosorbent Assay ; Gene Expression Regulation, Bacterial ; Genes, Bacterial ; genetics ; Humans ; Leptospira interrogans ; genetics ; Leptospirosis ; immunology ; microbiology ; Lipoproteins ; genetics ; Prokaryotic Cells ; metabolism ; Recombinant Fusion Proteins ; biosynthesis ; genetics ; immunology