Since December 2019,COVID-19 has occurred unexpectedly and emerged as a health problem worldw ide.Despite the rapidly increasing number of cases in subsequent weeks,the clinical characteristics of pediatric cases are ...Since December 2019,COVID-19 has occurred unexpectedly and emerged as a health problem worldw ide.Despite the rapidly increasing number of cases in subsequent weeks,the clinical characteristics of pediatric cases are rarely described.A cross-sectional multicenter study was carried out in 10 hospitals across Hubei province.A total of 25 confirmed pediatric cases of COVID-19 were collected.The demographic data,epidemiological history,underlying discascs,clinical mani festations,laboratory and radiological data,treatments,and outcomes were analyzcd.Of 25 hospitalized patients with COVID-19,the boy to girl ratio was 1.27:1.The median age was 3 years.COVID-19 cases in children aged<3 years,3-6 years,and≥6-years patients were 10(40%),6(24%),and 9(36%),respectively.The most common symptoms at onset of ilness were fever(13[52%]),and dry cough(11[44%]).Chest CT images showed essential normal in 8 cases(33.3%),unilateral involvement of lungs in 5 cases(20.8%),and bilateral involvement in 11 cases(45.8%).Clinical diagnoses included upper respiratory tract infection(n=8),mild pneumonia(n=15),and critical cases(n=2).Two critical cases(8%)were given invasive mechanical ventilation,corticosteroids,and immunoglobulin.The symptoms in 24(96%)of 25 patients were alleviated and one patient had been discharged.It was concluded that children were susceptible to COVID-19 like adults,while the clinical presentations and outcomes were more favorable in children.However,children less than 3 years old accounted for majority cases and critical cases lied in this age group,which demanded extra attentions during home caring and hospitalization treatment.展开更多
Coronary heart disease (CHD) is a hypoxia related disease. However, the relationship of the hypoxia-induced oxidative stress, autophagy and apoptosis in cardiomyocyte remains unclear. In this study, we used CoCl2 to m...Coronary heart disease (CHD) is a hypoxia related disease. However, the relationship of the hypoxia-induced oxidative stress, autophagy and apoptosis in cardiomyocyte remains unclear. In this study, we used CoCl2 to mimic hypoxic conditions in H9c2 cardiomyocytes and study the effects of CoCl2-induced hypoxia on oxidative stress, apoptosis and autophagy, as well as the relationships among these processes. Cell viability and levels of ROS, LC3-II, p62, caspase-3 and PARP were assessed. The viability and morphology of cardiomyocytes were affected by hypoxia, and hypoxia enhanced levels of ROS and the levels of the LC3-II, p62, caspase-3 and PARP proteins in H9c2 cells in a dose-dependent manner. ROS levels rise gradually in the presence of hypoxia;however, it shrinks when hypoxia reaches a certain level. Caspase-3 and PARP levels were raised with the increasing of hypoxia level. Enhanced level of LC3 and decreased levels of p62 in hypoxic cells indicate that autophagy levels are in accord with hypoxia. Based on these results, hypoxia induces oxidative stress, apoptosis and autophagy in cardiomyocytes. Autophagy is a double-edged sword. At a low level, autophagy can resist oxidative stress and protect cardiomyocytes from oxidative stress, while high level autophagy can promote apoptosis of cardiomyocytes.展开更多
Objective:To discuss the effect of salvia miltiorrhiza injection adjuvant therapy on systemic inflammatory stress state and nerve injury degree of children with bacterial meningitis. Methods: 68 cases of children with...Objective:To discuss the effect of salvia miltiorrhiza injection adjuvant therapy on systemic inflammatory stress state and nerve injury degree of children with bacterial meningitis. Methods: 68 cases of children with bacterial meningitis who were treated in our hospital from Feb. 2014 to Jan. 2017 were selected and were divided into control group (34 cases) and observation group (34 cases) based on random number table, and patients in both groups were treated with continuous treatment for 10 d. Differences of inflammatory mediator, oxidative stress index, nerve injury markers content in cerebrospinal fluid in both groups were compared. Results: Before treatment, differences of inflammatory mediator, oxidative stress index, nerve injury markers content in cerebrospinal fluid in both groups had no statistical significance. 10 d after treatment, inflammatory mediator IL-6, PCT, sVCAM-1, CRP content in cerebrospinal fluid of children in observation group was lower than that in control group;oxidative stress index MDA content in cerebrospinal fluid was lower than that in control group, and SOD content was higher than that in control group;nerve injury markers MBP, NSE, GFAP content in cerebrospinal fluid was lower than that in control group.Conclusion: salvia miltiorrhiza injection adjuvant therapy could effectively relieve the systemic inflammatory stress state and reduce the nerve damages of children with bacterial meningitis.展开更多
Objective:To detect the content of SP-D in cerebrospinal fluid(CSF) of children with viral encephalitis, evaluate the correlation between SP-D and indexes of brain injury, inflammatory reaction and cellular immune dis...Objective:To detect the content of SP-D in cerebrospinal fluid(CSF) of children with viral encephalitis, evaluate the correlation between SP-D and indexes of brain injury, inflammatory reaction and cellular immune disorder.Methods: 78 cases of viral encephalitis children diagnosed in our hospital during December 2016 to May 2018 were selected as Viral encephalitis group, 51 cases of fever without intracranial infection children were selected as Control group. The cerebrospinal fluid samples of two groups were taken and SP-D, brain injury-related indicators, inflammatory indicators and T lymphocyte subsets were detected. Pearson test was used to analyze the relationship between SP-D content in CSF and above indicators.Results: Content of SP-D in CSF of Viral encephalitis group was lower than that of control group (P<0.05). Contents of MBP, CK-BB, NSE and S100B in CSF of Viral encephalitis group were higher than those of Control group;contents of IL-1β, TNF-αand ICAM-1 in CSF of Viral encephalitis group were higher than those of Control group;distribution proportion of CD3+, CD4+ T lymphocytes and CD4+/CD8+ ratio in CSF were lower than those of Control group, and levels of CD8+ were higher than that of Control group (P<0.05). Correlation analysis showed that, SP-D content in CSF of viral encephalitis children was directly related to brain injury indexes, inflammatory indexes and T lymphocyte subsets distribution levels(P<0.05).Conclusion: Content of SP-D in CSF of viral encephalitis children decreases abnormally, the specific content is directly related to the degree of brain injury, intracranial inflammation and cellular immune dysfunction. It is important to evaluate the severity of the disease.展开更多
Objective:To study the correlation of intestinal flora disorder with systemic inflammatory response and stress response in children with severe pneumonia.Methods: The children who were diagnosed with severe pneumonia ...Objective:To study the correlation of intestinal flora disorder with systemic inflammatory response and stress response in children with severe pneumonia.Methods: The children who were diagnosed with severe pneumonia in Xiangyang No. 1 People's Hospital between April 2014 and December 2017 were selected as the pneumonia group of the study, and the healthy children who received physical examination in Xiangyang No. 1 People's Hospital during the same period were selected as the control group. The feces was collected to determine the number of intestinal flora bifidobacteria and Escherichia coli (E. coli). Besides, the serum was collected to determine the contents of inflammatory cytokines and oxidative stress indexes, and the peripheral blood was collected to determine the expression intensity of inflammatory molecules and oxidative stress molecules.Results:The number of bifidobacteria and the level of Bifidobacterium and E. coli ratio B/E in feces as well as SOD content in serum of pneumonia group were significantly lower than those of control group whereas the number of E. coli in feces, TLR2, TLR4, NOX2, iNOS and FOXP3 expression intensity in peripheral blood as well as G-CSF, sTREM1, TNF-α, LPO and NO contents in serum were significantly higher than those of control group;Pearson correlation analysis showed that B/E level in feces of pneumonia group was negatively correlated with TLR2, TLR4, NOX2, iNOS and FOXP3 expression intensity in peripheral blood as well as G-CSF, sTREM1, TNF-α, LPO and NO contents in serum, and positively correlated with SOD content in serum.Conclusion:The intestinal flora disorder in children with severe pneumonia can aggravate the degree of systemic inflammatory response and stress response in the course of disease.展开更多
Objective:To detect serum contents of IgE, Eotaxin and explore the relationship between serum IgE, Eotaxin and asthma severity.Methods: 140 cases of asthma children diagnosed in our hospital during January 2017 to Mar...Objective:To detect serum contents of IgE, Eotaxin and explore the relationship between serum IgE, Eotaxin and asthma severity.Methods: 140 cases of asthma children diagnosed in our hospital during January 2017 to March 2018 were chosen as Asthma group, 100 cases of healthy children vaccinated in our hospital at the same time were chosen as Normal control group. Serum contents of IgE, Eotaxin, inflammatory mediators and airway remodeling indexes were detected in two groups. Correlation analysis was used to evaluate the relationship between serum IgE, Eotaxin content and severity of asthma.Results: Serum contents of IgE and Eotaxin in Asthma group were significantly higher than those in Normal control group, and contents of IL-9, IL-17, IL-18 and IL-33 were higher than those in Normal control group, IL-35 was lower than that in Normal control group;serum contents of MMP-2, MMP-9, TGF-β and VEGF in Asthma group were significantly higher than those in Normal control group (P<0.05). Pearson test found that serum contents of IgE, Eotaxin in asthma children were positively correlated with inflammatory mediators such as IL-9, IL-17, IL-18, IL-33, negatively correlated with IL-35;positively correlated with airway remodeling indexes such as MMP-2, MMP-9, TGF-β and VEGF.Conclusion: Serum contents of IgE, Eotaxin in asthma children are significantly higher than those in normal children, and the specific contents were closely related to the degree of systemic inflammatory response and airway remodeling.展开更多
X-ray pulsar navigation(XPNAV) is an attractive method for autonomous navigation of deep space in the future. Currently, techniques for estimating the phase of X-ray pulsar radiation involve the maximization of the ge...X-ray pulsar navigation(XPNAV) is an attractive method for autonomous navigation of deep space in the future. Currently, techniques for estimating the phase of X-ray pulsar radiation involve the maximization of the general non-convex object functions based on the average profile from the epoch folding method. This results in the suppression of useful information and highly complex computation. In this paper, a new maximum likelihood(ML) phase estimation method that directly utilizes the measured time of arrivals(TOAs) is presented. The X-ray pulsar radiation will be treated as a cyclo-stationary process and the TOAs of the photons in a period will be redefined as a new process, whose probability distribution function is the normalized standard profile of the pulsar. We demonstrate that the new process is equivalent to the generally used Poisson model. Then, the phase estimation problem is recast as a cyclic shift parameter estimation under the ML estimation, and we also put forward a parallel ML estimation method to improve the ML solution. Numerical simulation results show that the estimator described here presents a higher precision and reduces the computational complexity compared with currently used estimators.展开更多
文摘Since December 2019,COVID-19 has occurred unexpectedly and emerged as a health problem worldw ide.Despite the rapidly increasing number of cases in subsequent weeks,the clinical characteristics of pediatric cases are rarely described.A cross-sectional multicenter study was carried out in 10 hospitals across Hubei province.A total of 25 confirmed pediatric cases of COVID-19 were collected.The demographic data,epidemiological history,underlying discascs,clinical mani festations,laboratory and radiological data,treatments,and outcomes were analyzcd.Of 25 hospitalized patients with COVID-19,the boy to girl ratio was 1.27:1.The median age was 3 years.COVID-19 cases in children aged<3 years,3-6 years,and≥6-years patients were 10(40%),6(24%),and 9(36%),respectively.The most common symptoms at onset of ilness were fever(13[52%]),and dry cough(11[44%]).Chest CT images showed essential normal in 8 cases(33.3%),unilateral involvement of lungs in 5 cases(20.8%),and bilateral involvement in 11 cases(45.8%).Clinical diagnoses included upper respiratory tract infection(n=8),mild pneumonia(n=15),and critical cases(n=2).Two critical cases(8%)were given invasive mechanical ventilation,corticosteroids,and immunoglobulin.The symptoms in 24(96%)of 25 patients were alleviated and one patient had been discharged.It was concluded that children were susceptible to COVID-19 like adults,while the clinical presentations and outcomes were more favorable in children.However,children less than 3 years old accounted for majority cases and critical cases lied in this age group,which demanded extra attentions during home caring and hospitalization treatment.
文摘Coronary heart disease (CHD) is a hypoxia related disease. However, the relationship of the hypoxia-induced oxidative stress, autophagy and apoptosis in cardiomyocyte remains unclear. In this study, we used CoCl2 to mimic hypoxic conditions in H9c2 cardiomyocytes and study the effects of CoCl2-induced hypoxia on oxidative stress, apoptosis and autophagy, as well as the relationships among these processes. Cell viability and levels of ROS, LC3-II, p62, caspase-3 and PARP were assessed. The viability and morphology of cardiomyocytes were affected by hypoxia, and hypoxia enhanced levels of ROS and the levels of the LC3-II, p62, caspase-3 and PARP proteins in H9c2 cells in a dose-dependent manner. ROS levels rise gradually in the presence of hypoxia;however, it shrinks when hypoxia reaches a certain level. Caspase-3 and PARP levels were raised with the increasing of hypoxia level. Enhanced level of LC3 and decreased levels of p62 in hypoxic cells indicate that autophagy levels are in accord with hypoxia. Based on these results, hypoxia induces oxidative stress, apoptosis and autophagy in cardiomyocytes. Autophagy is a double-edged sword. At a low level, autophagy can resist oxidative stress and protect cardiomyocytes from oxidative stress, while high level autophagy can promote apoptosis of cardiomyocytes.
文摘Objective:To discuss the effect of salvia miltiorrhiza injection adjuvant therapy on systemic inflammatory stress state and nerve injury degree of children with bacterial meningitis. Methods: 68 cases of children with bacterial meningitis who were treated in our hospital from Feb. 2014 to Jan. 2017 were selected and were divided into control group (34 cases) and observation group (34 cases) based on random number table, and patients in both groups were treated with continuous treatment for 10 d. Differences of inflammatory mediator, oxidative stress index, nerve injury markers content in cerebrospinal fluid in both groups were compared. Results: Before treatment, differences of inflammatory mediator, oxidative stress index, nerve injury markers content in cerebrospinal fluid in both groups had no statistical significance. 10 d after treatment, inflammatory mediator IL-6, PCT, sVCAM-1, CRP content in cerebrospinal fluid of children in observation group was lower than that in control group;oxidative stress index MDA content in cerebrospinal fluid was lower than that in control group, and SOD content was higher than that in control group;nerve injury markers MBP, NSE, GFAP content in cerebrospinal fluid was lower than that in control group.Conclusion: salvia miltiorrhiza injection adjuvant therapy could effectively relieve the systemic inflammatory stress state and reduce the nerve damages of children with bacterial meningitis.
文摘Objective:To detect the content of SP-D in cerebrospinal fluid(CSF) of children with viral encephalitis, evaluate the correlation between SP-D and indexes of brain injury, inflammatory reaction and cellular immune disorder.Methods: 78 cases of viral encephalitis children diagnosed in our hospital during December 2016 to May 2018 were selected as Viral encephalitis group, 51 cases of fever without intracranial infection children were selected as Control group. The cerebrospinal fluid samples of two groups were taken and SP-D, brain injury-related indicators, inflammatory indicators and T lymphocyte subsets were detected. Pearson test was used to analyze the relationship between SP-D content in CSF and above indicators.Results: Content of SP-D in CSF of Viral encephalitis group was lower than that of control group (P<0.05). Contents of MBP, CK-BB, NSE and S100B in CSF of Viral encephalitis group were higher than those of Control group;contents of IL-1β, TNF-αand ICAM-1 in CSF of Viral encephalitis group were higher than those of Control group;distribution proportion of CD3+, CD4+ T lymphocytes and CD4+/CD8+ ratio in CSF were lower than those of Control group, and levels of CD8+ were higher than that of Control group (P<0.05). Correlation analysis showed that, SP-D content in CSF of viral encephalitis children was directly related to brain injury indexes, inflammatory indexes and T lymphocyte subsets distribution levels(P<0.05).Conclusion: Content of SP-D in CSF of viral encephalitis children decreases abnormally, the specific content is directly related to the degree of brain injury, intracranial inflammation and cellular immune dysfunction. It is important to evaluate the severity of the disease.
文摘Objective:To study the correlation of intestinal flora disorder with systemic inflammatory response and stress response in children with severe pneumonia.Methods: The children who were diagnosed with severe pneumonia in Xiangyang No. 1 People's Hospital between April 2014 and December 2017 were selected as the pneumonia group of the study, and the healthy children who received physical examination in Xiangyang No. 1 People's Hospital during the same period were selected as the control group. The feces was collected to determine the number of intestinal flora bifidobacteria and Escherichia coli (E. coli). Besides, the serum was collected to determine the contents of inflammatory cytokines and oxidative stress indexes, and the peripheral blood was collected to determine the expression intensity of inflammatory molecules and oxidative stress molecules.Results:The number of bifidobacteria and the level of Bifidobacterium and E. coli ratio B/E in feces as well as SOD content in serum of pneumonia group were significantly lower than those of control group whereas the number of E. coli in feces, TLR2, TLR4, NOX2, iNOS and FOXP3 expression intensity in peripheral blood as well as G-CSF, sTREM1, TNF-α, LPO and NO contents in serum were significantly higher than those of control group;Pearson correlation analysis showed that B/E level in feces of pneumonia group was negatively correlated with TLR2, TLR4, NOX2, iNOS and FOXP3 expression intensity in peripheral blood as well as G-CSF, sTREM1, TNF-α, LPO and NO contents in serum, and positively correlated with SOD content in serum.Conclusion:The intestinal flora disorder in children with severe pneumonia can aggravate the degree of systemic inflammatory response and stress response in the course of disease.
文摘Objective:To detect serum contents of IgE, Eotaxin and explore the relationship between serum IgE, Eotaxin and asthma severity.Methods: 140 cases of asthma children diagnosed in our hospital during January 2017 to March 2018 were chosen as Asthma group, 100 cases of healthy children vaccinated in our hospital at the same time were chosen as Normal control group. Serum contents of IgE, Eotaxin, inflammatory mediators and airway remodeling indexes were detected in two groups. Correlation analysis was used to evaluate the relationship between serum IgE, Eotaxin content and severity of asthma.Results: Serum contents of IgE and Eotaxin in Asthma group were significantly higher than those in Normal control group, and contents of IL-9, IL-17, IL-18 and IL-33 were higher than those in Normal control group, IL-35 was lower than that in Normal control group;serum contents of MMP-2, MMP-9, TGF-β and VEGF in Asthma group were significantly higher than those in Normal control group (P<0.05). Pearson test found that serum contents of IgE, Eotaxin in asthma children were positively correlated with inflammatory mediators such as IL-9, IL-17, IL-18, IL-33, negatively correlated with IL-35;positively correlated with airway remodeling indexes such as MMP-2, MMP-9, TGF-β and VEGF.Conclusion: Serum contents of IgE, Eotaxin in asthma children are significantly higher than those in normal children, and the specific contents were closely related to the degree of systemic inflammatory response and airway remodeling.
基金Project supported by the National Natural Science Foundation of China(No.61172138)the Fundamental Research Funds for the Central Universities(Nos.K5051302015 and K5051302040)+1 种基金the Natural Science Basic Research Plan in Shaanxi Province of China(No.2013JQ8040)the Research Fund for the Doctoral Program of Higher Education of China(No.20130203120004)
文摘X-ray pulsar navigation(XPNAV) is an attractive method for autonomous navigation of deep space in the future. Currently, techniques for estimating the phase of X-ray pulsar radiation involve the maximization of the general non-convex object functions based on the average profile from the epoch folding method. This results in the suppression of useful information and highly complex computation. In this paper, a new maximum likelihood(ML) phase estimation method that directly utilizes the measured time of arrivals(TOAs) is presented. The X-ray pulsar radiation will be treated as a cyclo-stationary process and the TOAs of the photons in a period will be redefined as a new process, whose probability distribution function is the normalized standard profile of the pulsar. We demonstrate that the new process is equivalent to the generally used Poisson model. Then, the phase estimation problem is recast as a cyclic shift parameter estimation under the ML estimation, and we also put forward a parallel ML estimation method to improve the ML solution. Numerical simulation results show that the estimator described here presents a higher precision and reduces the computational complexity compared with currently used estimators.