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Objective@#To explore imaging characteristics of children with 2019 novel coronavirus (2019-nCoV) infection.@*Methods@#A retrospective analysis was performed on clinical data and chest CT images of 15 children diagnosed with 2019-nCoV. They were admitted to the third people’s Hospital of Shenzhen from January 16 to February 6, 2020. The distribution and morphology of pulmonary lesions on chest CT images were analyzed.@*Results@#Among the 15 children, there were 5 males and 10 females, aged from 4 to 14 years old. Five of the 15 children were febrile and 10 were asymptomatic on first visit. The first nasal or pharyngeal swab samples in all the 15 cases were positive for 2019-nCoV nucleic acid. For their first chest CT images, 6 patients had no lesions, while 9 patients had pulmonary inflammation lesions. Seven cases of small nodular ground glass opacities and 2 cases of speckled ground glass opacities were found. After 3 to 5 days of treatment, 2019-nCoV nucleic acid in a second respiratory sample turned negative in 6 cases. Among them, chest CT images showed less lesions in 2 cases, no lesion in 3 cases, and no improvement in 1 case. Other 9 cases were still positive in a second nucleic acid test. Six patients showed similar chest CT inflammation, while 3 patients had new lesions, which were all small nodular ground glass opacities.@*Conclusions@#The early chest CT images of children with 2019-nCoV infection are mostly small nodular ground glass opacities. The clinical symptoms of children with 2019-nCoV infection are nonspecific. Dynamic reexamination of chest CT and nucleic acid are important.
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Objective@#To explore imaging characteristics of children with 2019 novel coronavirus (2019-nCoV) infection. @*Methods@#A retrospective analysis was performed on clinical data and chest CT images of 15 children diagnosed with 2019-nCoV. They were admitted to the third people’s Hospital of Shenzhen from January 16 to February 6, 2020. The distribution and morphology of pulmonary lesions on chest CT images were analyzed.@*Results@#Among the 15 children, there were 5 males and 10 females, aged from 4 to 14 years old. Five of the 15 children were febrile and 10 were asymptomatic on first visit. The first nasal or pharyngeal swab samples in all the 15 cases were positive for 2019-nCoV nucleic acid. For their first chest CT images, 6 patients had no lesions, while 9 patients had pulmonary inflammation lesions. Seven cases of small nodular ground glass opacities and 2 cases of speckled ground glass opacities were found. After 3 to 5 days of treatment, 2019-nCoV nucleic acid in a second respiratory sample turned negative in 6 cases. Among them, chest CT images showed less lesions in 2 cases, no lesion in 3 cases, and no improvement in 1 case. Other 9 cases were still positive in a second nucleic acid test. Six patients showed similar chest CT inflammation, while 3 patients had new lesions, which were all small nodular ground glass opacities.@*Conclusions@#The early chest CT images of children with 2019-nCoV infection are mostly small nodular ground glass opacities. The clinical symptoms of children with 2019-nCoV infection are nonspecific. Dynamic reexamination of chest CT and nucleic acid are important.
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Objective To evaluate the condition of oxidative stress and immunosuppression in early stage of severe sepsis,and investigate the correlation between them. Methods A prospective random control study in-cluded patients group(n=51)and control group(n=31). The concentration of serum superoxide dismutase was measured by enzyme linked immunosorbent assay(ELISA),CD4+CD25+Treg% was measured by flow cytometry , respectively. The difference between two groups was compared and the correlation between parameters in patients group was evaluated. Results The concentration of serum SOD was lower than control group (P < 0.01). CD4+CD25+Treg% significantly high,compared to the control group(P < 0.01). There was no strong correlation be-tween parameters in patients group. Conclusion Oxidative stress and immunosuppression are exist in the early stage of severe sepsis.
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Objective Within human hepatoma cell lines,we aimed to investigate the effects of the down-regulation by RNAi on different fragments of osteopontin (OPN) in order to discover more effective and accurate sites for OPN.Methods Specific small interfering RNA of OPN (OPNi-1) were synthesized and transfected into human hepatoma cell line (HEP-G2).Fluorescent quantitative PCR and immunohistochemical methods were used to test*the OPN expression levels of mRNA and protein before and after RNAi.Results After transfection,the △CT value of the A fragment was greater than B and C fragments of OPN mRNA in HEP-G2.Before RNAi was added to HEP-G2 cells,the three fragments A,B,C had OPN mRNA CT values of 8.31±1.58,8.78±1.49,8.25±1.51 respectively.Once the RNAi were added,the CT values were measured 48h after for the fragments A,B,and C which were 12.14±1.43,10.22±1.97,10.48±1.88 (P＜0.05) respectively.The immunohis tochemical values of A,B,C were down from 6.44±1.67,5.43±2.05,5.45±2.52 to 2.84±1.52,4.43± 1.65,3.95± 1.43 respectively after interference.Conclusions RNAi can inhibit the expression of OPN gene selectively.siRNA targets different segments of OPN,which may have more effects on invasion and metastasis of liver cancer for a more important significance in science and health economics.