ABSTRACT
Objective To explore the heme oxygenase-1 (HO-1) content of carbon monoxide (CO) levels and clinical significance of Mycoplasma pneumoniae infection in children.Methods 219 cases of mycoplasma pneumonia from October 2013 to June 2015 in our hospital were divided into two groups,which were non-asthmatic group (156 cases) and wheezing group (63 cases),and the wheezing group were divided into two groups according to the presence or absence of hypoxemia and mild asthmatic group (39 cases) and severe asthmatic group (24 cases).HO-1 content in the blood was measured by enzyme-linked immunosorbent assay,using dual-wavelength spectrophotometric determination of hemoglobin oxygen percentage of broken (COHb％),analysis of the differences between the groups.Results Children with blood COHb content wheezing group were (2.59 ± 0.40)％ and HO-1 levels were (1 813.24 ± 28.34)ng/L and non-respite group were significantly increased,it had significant differences between the two groups (P＜ 0.05).Group of children with severe wheezing COHb content were (3.63 ± 0.45)％ and HO-1 levels were (2 594.34±23.94)ng/L and mild wheezing group were significantly increased,it had significant differences between the two groups (P＜0.05).Positive correlation between blood COHb content and HO-1 levels were significantly (r=0.733,P＜0.05).Conclusion Mycoplasma pneumoniae infection in children with wheezing blood COHb content and HO-1 levels were significantly increased,and with wheezing exacerbation and showed an increasing trend,suggesting that CO and HO-1 may be involved in Mycoplasma pneumoniae infection in children in the pathogenesis of wheezing,should lead to clinical attention.
ABSTRACT
OBJECTIVE@#Astragaloside is a simple substance of saponin and the active constituent of astragali. It was reported that the astragaloside exerted therapeutical eff ect on viral myocarditis and dilated cardiomyopathy. The purpose of this study was to investigate the effect of astragaloside on TL1A expression in viral myocarditis.@*METHODS@#A total of 100 BALB/c mice were randomly divided into 6 groups: the normal control group (group A, n=10), the high-dose control group (group B, n=10), the myocarditis control group (group C, n=20), the low-dose group (group D, n=20), the middle-dose group (group E, n=20) and the high-dose group (group F, n=20). Mice in group A and group B were injected intraperitoneally with 0.1 mL EMEM solution, while mice in group C, D, E and F were treated with 0.1 mL of 1×102 TCID50 CVB3 (diluted in EMEM). Then, mice in group A and group B were treated with carboxymethycellulose solution and 9% astragaloside for 1 week, respectively. At the same time, mice in group C, D, E and F were treated with sodium carboxymethycellulose solution, 1% [0.07 g/(kg.d)], 3% [0.2 g/(kg.d)] and 9%[0.6 g/(kg.d)] astragaloside for 1 week, respectively. After 14 days, the mice were sacrificed and their hearts were collected. The expression levels of TL1A mRNA and protein in the myocardium were examined by RT-PCR and immunohistochemistry, respectively.@*RESULTS@#There was no death in the group A and B. The mortality in the group C, D, E and F was 45% (9/20), 30% (6/20), 25% (5/20) and 10% (2/20), respectively. Compared with the group C, the mortality in the group F was significantly decreased (P0.05). There was no any pathological lesion in the group A and B. The TL1A mRNA and protein expression in the myocardium of mice in the group A and B was at low level, with no difference between them (P>0.05). Compared with the group A, the expression levels of TL1A mRNA and protein in the group C were markedly up-regulated (P0.05).@*CONCLUSION@#Astragaloside may play a pivotal role in protection of the heart injury in viral myocarditis by suppressing the expression of TL1A.