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Objective@#To understand the sedentary behavior level of children and adolescents with intellectual disabilities in Jinan City, and to provide a reference basis for developing health behavior intervention strategies.@*Methods@#By used the method of cluster random sampling,the Children s Leisure Activities Study Survey was used to investigate the sedentary behavior level of 285 children and adolescents with intellectual disabilities aged 6-18 years from 7 special education schools in Jinan City.@*Results@#The sedentary behavior time during the whole week among children and adolescents with intellectual disabilities in Jinan City was 394.46 min/d, including 378.00 min/d on weekdays(Monday to Friday) and 388.80 min/d on weekends (Saturday and Sunday), the difference was statistically significant ( Z =-2.19, P <0.05). 80.4%(229) of children and adolescents with intellectual disabilities had sedentary behavior time of more than 2 h/d. The sedentary behavior time per day during the whole week among children and adolescents with intellectual disabilities was negatively correlated with the amount of time spent in moderate vigorous physical activity among them ( r =-0.16, P <0.05).@*Conclusion@#Excessive sedentary behavior has become a growing public health concern among children and adolescents with intellectual disabilities,which warrants targeted healthy behavior intervention.
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Objective:To evaluate the feasibility of a new ultrasonic parameter to assess right ventricular-pulmonary artery (RV-PA) coupling in patients with acute pulmonary embolism (APE).Methods:A retrospective analysis was performed in 140 patients with APE diagnosed by computed tomography pulmonary angiography (CTPA) in the Second Affiliated Hospital of Harbin Medical University from August 2017 to June 2020. According to the tricuspid annular plane systolic excursion/pulmonary arterial systolic pressure (TAPSE/PASP) ratio cutoff value 0.40 mm/mmHg reported by the European Society of Cardiology in 2020, the patients were divided into the coupling group ( n=99) and the uncoupling group ( n=41). The conventional ultrasonic parameters of the 2 groups were measured, and then several ultrasonic parameter ratios were obtained. The new ultrasonic parameter, which can replace the TAPSE/PASP ratio, was screened out by Spearman correlation analysis, and ROC curve was plotted to calculate the diagnostic efficacy of this parameter. Results:①Compared with the coupling group, patients in the uncoupling group were older and more likely to be accompanied by dyspnea and venous thrombosis in the lower extremities (all P<0.05), but there was no significant difference in other general data(all P>0.05); ②Compared with the coupling group, tricuspid regurgitation velocity (TRV), tricuspid regurgitation pressure gradient(TRPG), PASP, right ventricle end-diastolic transverse diameter(RVTD), inferior vena cava(IVC) diameter and the ratio of early diastolic tricuspid inflow to tricuspid lateral annular velocity(E/e′), in the uncoupling group increased significantly (all P<0.05), and TAPSE, peak systolic velocity of tricuspid annulus(s′), TAPSE/PASP ratio, TAPSE/TRPG ratio, TAPSE/RVTD ratio and s′/TRPG ratio decreased significantly (all P<0.05); ③The TAPSE/TRPG ratio was highly correlated with TAPSE/PASP ratio ( rs=0.970, P<0.001); The TAPSE/TRPG ratio was still highly correlated with TAPSE/PASP ratio in the uncoupling and coupling groups ( rs=0.966, 0.922; all P<0.001). ④ROC analysis showed that the area under curve for TAPSE/TRPG in diagnosing RV-PA coupling was 0.992. At the cutoff of TAPSE/TRPG <0.625 mm/mmHg for indicating RV-PA coupling, the sensitivity and specificity were 97.6% and 92.9%, respectively. Conclusions:TAPSE/TRPG ratio can be used as a new ultrasonic parameter to reflect RV-PA coupling, which is helpful for clinical identification of APE patients with high risk and poor prognosis.
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Objective:To investigate the effects of early applying of basic fibroblast growth factor (bFGF) on corneal haze formation after surface ablation surgery in rabbits.Methods:The right eyes of 60 healthy New Zealand white rabbits received photorefractive keratectomy (PRK) and were randomized into PRK+ normal saline group, PRK+ bFGF group and simple PRK group, with 20 rabbits in each group.Normal saline solution and bFGF were topically administered according to grouping, respectively, 3 times per day, 1 drop for each time until the sacrifice of the animals, and no drug was used in the PRK group.Another 8 normal rabbits were served as blank control group.The corneal healing response and haze formation were evaluated by anterior segment photography and anterior segment optical coherence tomography (AS-OCT) and graded based on Fantes criteria.Corneal histopathology was examined by hematoxylin-eosin staining.Immunohistochemistry was used to detect the expression of transforming growth factor-β 1(TGF-β 1), α-smooth muscle actin (α-SMA) and matrix metalloproteinase-2 (MMP-2) in cornea.This study protocol was approved by the Experimental Animal Ethic Committee of Affiliated Hospital of Binzhou Medical University (20180209-03). The use and care of the animals complied with the Statement of ARVO. Results:The corneal epithelium was completely healed in 3-4 days following surgery and there was not significantly different in healing time among the three groups.( F=0.57, P=0.57). The haze grading was significantly different among different groups at different time points ( Fgroup=41.736, P<0.01; Ftime=129.445, P<0.01) and showed the highest score in the PRK+ bFGF group on the 28th day after operation.On the 7th day after surgery, AS-OCT image showed that the surface reflection of corneal epithelium was continuous and smooth and corneal epithelium was not tightly attached to the superficial stromal layer; the reflection of the superficial stromal layer was enhanced in all the operation groups.The proliferation of corneal epithelial cells and superficial stromal layer in the operation area were seen under the optical microscope, and the arrangement of collagen fibers in the stromal layer was disordered with the most obvious changes in the PRK+ bFGF group in comparison with the PRK+ normal saline group and the simple PRK group, and these findings became worse on postoperative 28 days.The corneal epithelial surface reflection in the blank control group was continuous and smooth.Immunohistochemistry showed that a few MMP-2 positive cells were seen in the blank control group.TGF-β 1, α-SMA and MMP-2 proteins were positively expressed in the corneas 7 days after surgery in the three groups, and their expressions were the most obvious in the PRK+ bFGF in comparison with the PRK+ normal saline group and the PRK group and were enhanced 28 days after operation, showing statistically differences (all at P<0.05). Conclusions:Early application of bFGF following surface ablation surgery promotes the proliferation of corneal epithelial cells and irregular arrangement of collagen in the superficial stromal layer, which is associated with the expressions of haze-related factors TGF-β 1, α-SMA and MMP-2 in corneas.
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Objective To develop a chemiluminescence imaging DNA microarray method for simultaneous,quick and accurate detection of serotypes of human adenovirus (HAdV ),namely,HAdV3,HAdV7,HAdV11,HAdV14 and HAdV55.Methods Based on the specific gene sequences in the conserved region of adenovirus from GenBank, oligonucleotide primers and probes were designed and synthesized to prepare the oligonucleotide microarray.The specific genomic sequences were amplified by multiplex PCR method.The multiplex PCR amplification products were hybridized with the specific probes of microarray that was scanned after washing and chemiluminescenceb before the result was analyzed.After optimization of the multiple PCR system,hybridization reactions and conditions of chemiluminescence,the specificity,sensitivity and reproducibility of the chip were evaluated.Results The microarray displayed high sensitivity, specificity and reproducibility.The minimum detection limit of plasmidg DNA was 3 ×103 copies/reaction.The microarray detection results of 38 clinical samples were approximately consistent with those using the direct sequencing method(37 /38).Conclusion A chemiluminescence imaging DNA microarray method for quick,sensitive and specific detection of five serotypes of HAdV is established,which can provide a new means for detecting serotypes of HAdV.
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Objective To develop a chemiluminescence imaging DNA microarray method for simultaneous,fast and accurate detection of nine rash-and fever-causing pathogens,namely,Measles virus,Rubella virus,Enterovirus type 71, Varicella zoster virus,Dengue fever virus,Human small FDNA virus B19,Coxsackie virus type A16,A-βStreptococcus pyogenes (hemolytic streptococcus)and Salmonella typhi.Methods Primers and probes were designed based on the specific sequence in the conserved region of genomes of the nine pathogens.The nucleic acids of the nine pathogens were amplified and labelled by multiplex PCR method.The multiplex PCR amplification products were hybridized with specific probes of microarray that was scanned after washing and chemiluminescence coloration to identify the nine pathogens.After the optimization of the multiplex PCR system,hybridization and chemiluminescence imaging,the specificity,sensitivity and reproducibility of the chip were evaluated.The serial diluted nucleic acid of Enterovirus type 71 was detected using microarray and real-time PCR approach to compare the sensitivity of these two methods.Results Nine specific primers and eleven specific probes were selected.The microarray demonstrated high sensitivity and specificity.The minimum detection limit of plasmid DNA and in vitro transcribed RNAs was 3 ×103 copies per reaction.The detection sensitivity of this microarray was 10 percent of that by the real-time PCR method.The rate of sensitivity and specificity of clinical sample detection was 95% and 85.7% respectively,and the rate of accuracy was 93.2%.Conclusion A chemiluminescence imaging DNA microarray method for simultaneous,fast and accurate detection of nine pathogens that cause rash and fever illnesses is established successfully,which can serve as a new high throuthput screening method for clinical diagnosis and epidemiological investigation of rash and fever illnesses.
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Objective To develop a chemiluminescence ( CL ) imaging DNA microarray method for simultaneous detection of seven rickettsiae.Methods Primers and probes were designed based on the specific sequence of seven rickettsia genomes.The probes were immobilized on the aldehyde modified glass surface to prepare DNA microarray for rickettsiae.The nucleic acids of the selected rickettsiae were amplified and labelled by multiplex PCR method, and then hybridized with microarray that was scanned after washing and chemiluminescence coloration, before the results were analyzed.Facilitated by the optimization of the multiplex PCR system, hybridization, and chemiluminescence imagination, we evaluated the specificity,sensitivity and reproducibility of the chip.The serial diluted nucleic acid of Rickettsia mooseri was detected using microarray and real-time PCR approach to compare the sensitivity of these two methods.Double-blind simulated samples were prepared to further evaluate the accuracy of the detection methods.Results One universal primer, four specific primers, one universal probe, and nine specific probes were selected.This DNA microarray demonstrated high specificity and sensitivity.The detection sensitivity of plasmid DNA and double-blind simulated sample DNA was 1.5 ×102 -3 ×103 copies per reaction and 103 -104 copies/μl.The detection results of real-time PCR method was consistent with the microarray, and the microarray possessed 10 fold lower detection sensitivities than the real-time PCR method.The coincidence rate of double-blind simulated sample detection was 100%.Conclusion A chemiluminescence imaging DNA microarray method for simultaneous detection of seven rickettsiae is established successfully,which can serve as a new high throuthput detection method for clinical diagnosis and epidemiological investigation of rickettsiae.
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Objective To develop a detection method based on the technology of gene chips which can quickly distinguish genes of Enterococcus faecalis, E.faecium and vancomycin resistance.Methods Based on the specific gene ( ddl) sequences of two types of Enterococcus from GenBank, oligonucleotide probes which could detect and distinguish special genes and drug resistance genes ( vanA,vanB) of Enterococcus were designed and compounded.Then,the probes were dotted to modified slide.The target DNA fragments of vancomycin-resistant Enterococcus ( VRE) were labeled with biotin by multiple PCR amplification, and then hybridized with oligonucleotide probes on slide.The results were analyzed by portable imager.The multiple PCR system, hybridization reaction and condition of the chemiluminescence method were optimized before the specificity, sensitivity and reproducibility of the chip were evaluated.Results One universal primer, four specific primers, one universal probe and four specific probes were selected.This gene chip was demonstrated of high specificity and repeatability.The detection sensitivity was 103 CFU/ml.The gene chip detection results of 10 clinical samples were basically consistent with the drug sensitivity test ( 8/10 ) .Conclusion A gene chip technique for the detection of VRE is established successfully.It is possible to distinguish the type of VRE and detect the genetic phenotypes of drug resistance by gene chip technique.