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Traumatic brain injury (TBI) is often accompanied by digestive system dysfunction, such as intestinal dysfunction and dysbacteriosis. The activation of neuroendocrine system after TBI is one of the factors leading to gut microbiota changes. A variety of antimicrobial peptides secreted by Paneth cells are the key factors to maintain intestinal flora homeostasis. The dysfunction of Paneth cells after TBI may be responsible for gut microbiota changes. The authors review the mechanism of gut microbiota changes induced by TBI to provide new ideas for clinical treatment of gut microbiota changes caused by TBI.
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Objective@#To investigate the value of Cytomegalovirus(CMV) DNA real-time quantitative-polymerase chain reaction(RT-PCR) in different body fluids for diagnosing CMV pneumonia in immunocompetent infants.@*Methods@#The clinical data of immunocompetent infants with CMV pneumonia who were treated in Pediatric Intensive Care Unit of Guangdong Women and Children′s Hospital from January 1st, 2016 to February 5th, 2018 were retrospectively analyzed.The clinical data included CMV DNA load of bronchoalveolar lavage fluid(BALF), urine, blood and cerebrospinal fluid(CSF); blood immunoglobulin(Ig)M CMV, alanine aminotransferase (ALT), X-ray and CT test of chest, combined infection, clinical manifestation and treatment.@*Results@#Nine hundred and twenty-six infants received bronchoalveolar lavage by bronchoscope, and 34 cases were diagnosed as immunocompetent with CMV pneumonia.The infants with CMV pneumonia: the positive percentage of urine CMV DNA, blood CMV DNA, blood IgM CMV and ALT elevation were 100.0%(34/34 cases), 61.8%(21/34 cases), 52.9%(18/34 cases) and 20.6%(7/34 cases), respectively.There was no difference in positive percentage between blood CMV DNA and blood IgM CMV (χ2=0.5, P>0.05). Both the positive percentages of blood CMV DNA and blood IgM CMV were lower than those in the urine CMV DNA, and the differences were statistically significant (χ2=16.1, 20.9, all P<0.05). The positive percentages of ALT elevation were lower than those in the positive percentage of urine CMV DNA, blood CMV DNA and blood IgM CMV, and the differences were statistically significant (χ2=44.8, 11.9, 7.7, all P<0.05). Ten patients′ CSF CMV DNA were tested, and they were all negative.The median load of CMV DNA in BALF, urine and blood was 170.0×105 copies/L, 130.0×105 copies/L and 6.0×105 copies/L.There was no difference in median load between BALF and urine (U=561, P>0.05). BALF CMV DNA load and blood CMV DNA load had a weak positive correlation (r=0.35, P<0.05), BALF CMV DNA load and age had a negative correlation (r=-0.42, P<0.05), and urine CMV DNA load and blood CMV DNA load had a positive correlation (r=0.52, P<0.05). No matter whether blood IgM CMV was positive, BALF CMV DNA load had no differences (U=92, P>0.05). The main radiographic signs were pulmonary interstitial lesions.Thirty-four immunocompetent infants with CMV pneumonia, 18 patients (52.9%) with symptoms lasted for over 2 weeks, 20 patients (58.8%) had complicated infections.They all received inductive treatment of Ganciclovir, 55.9%(19/34 cases) patients′ urine CMV DNA turned to be negative.When patients got combined infections by bacteria or mycoplasma, antibiotics were used.All discharged patients had symptoms relieved and signs improved.@*Conclusions@#BALF RT-PCR is instant, sensitive and distinctive method to diagnose CMV pneumonia.Urine RT-PCR gets specimens conveniently and safely, its positive percentage and DNA load are present well according to BALF, and is suitable for screening and monitoring CMV infection.Blood CMV DNA load and blood IgM CMV indicate viral dissemination and immunocompetence, but it is not recommended for diagnosing CMV pneumonia solely.
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Objective To investigate the value of Cytomegalovirus(CMV) DNA real-time quantitative-polymerase chain reaction(RT-PCR) in different body fluids for diagnosing CMV pneumonia in immunocompetent infants.Methods The clinical data of immunocompetent infants with CMV pneumonia who were treated in Pediatric Intensive Care Unit of Guangdong Women and Children's Hospital from January 1st,2016 to February 5th,2018 were retrospectively analyzed.The clinical data included CMV DNA load of bronchoalveolar lavage fluid (BALF),urine,blood and cerebrospinal fluid(CSF);blood immunoglobulin(Ig) M CMV,alanine aminotransferase (ALT),X-ray and CT test of chest,combined infection,clinical manifestation and treatment.Results Nine hundred and twenty-six infants received bronchoalveolar lavage by bronchoscope,and 34 cases were diagnosed as immunocompetent with CMV pneumonia.The infants with CMV pneumonia:the positive percentage of urine CMV DNA,blood CMV DNA,blood IgM CMV and ALT elevation were 100.0％ (34/34 cases),61.8％ (21/34 cases),52.9％ (18/34 cases) and 20.6％ (7/34 cases),respectively.There was no difference in positive percentage between blood CMV DNA and blood IgM CMV (x2 =0.5,P ＞ 0.05).Both the positive percentages of blood CMV DNA and blood IgM CMV were lower than those in the urine CMV DNA,and the differences were statistically significant (x2 =16.1,20.9,all P ＜0.05).The positive percentages of ALT elevation were lower than those in the positive percentage of urine CMV DNA,blood CMV DNA and blood IgM CMV,and the differences were statistically significant (x2 =44.8,11.9,7.7,all P ＜ 0.05).Ten patients' CSF CMV DNA were tested,and they were all negative.The median load of CMV DNA in BALF,urine and blood was 170.0 × 105 copies/L,130.0 x 105 copies/L and 6.0 x 105 copies/L.There was no difference in median load between BALF and urine (U =561,P ＞ 0.05).BALF CMV DNA load and blood CMV DNA load had a weak positive correlation (r =0.35,P ＜ 0.05),BALF CMV DNA load and age had a negative correlation (r =-0.42,P ＜ 0.05),and urine CMV DNA load and blood CMV DNA load had a positive correlation (r =0.52,P ＜ 0.05).No matter whether blood IgM CMV was positive,BALF CMV DNA load had no differences (U =92,P ＞ 0.05).The main radiographic signs were pulmonary interstitial lesions.Thirty-four immunocompetent infants with CMV pneumonia,18 patients (52.9％) with symptoms lasted for over 2 weeks,20 patients (58.8％) had complicated infections.They all received inductive treatment of Ganciclovir,55.9％ (19/34 cases) patients' urine CMV DNA turned to be negative.When patients got combined infections by bacteria or mycoplasma,antibiotics were used.All discharged patients had symptoms relieved and signs improved.Conclusions BALF RT-PCR is instant,sensitive and distinctive method to diagnose CMV pneumonia.Urine RT-PCR gets specimens conveniently and safely,its positive percentage and DNA load are present well according to BALF,and is suitable for screening and monitoring CMV infection.Blood CMV DNA load and blood IgM CMV indicate viral dissemination and immunocompetence,but it is not recommended for diagnosing CMV pneumonia solely.
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Objective To summarize the clinical characteristics and therapeutic effect of congenital vascular rings in in-fants. Methods The clinical data of 54 children with vascular rings were retrospectively analyzed from August 2011 to June 2017 at our center for surgical treatment. Age 2 days to 11 months,the median age was 1 months;weight 1. 4 - 9. 4 kg,the average weight of(4. 52 ± 1. 89)kg. The type of vascular ring includes 21 cases of double aortic arch,right aortic arch with left aortic duct / ligament with or without vagal left subclavian artery in 14 cases,9 cases of pulmonary artery suture,left aortic arch with right aortic duct / ligament with or without 5 cases of oblique right subclavian artery,3 cases of nameless arterial com-pression syndrome,2 cases of other vascular rings. All cases underwent echocardiography,chest radiography,and CT scan of the heart,and 42 cases were examined before operation or intraoperative bronchoscopy. 39 cases(72％)had tracheal stenosis. Results Twenty-six patients underwent extracorporeal circulation underwent vascular anteroposterior surgery with an average extracorporeal circulation time of( 160 ± 61)min and 28 patients underwent extracorporeal circulation. Postoperative mechani-cal ventilation 1 to 22 days,the median number of days 2 days;hospitalization time 7 to 62 days,the median of 19 days,hos-pital death in 2 cases(3. 7％). Discharge patients were followed up for 2 to 74 months,respiratory symptoms to varying degrees to ease or disappear,discharged in 3 cases. Conclusion Airway stenosis is a serious complication of the vascular ring. CT is the best way to determine the vascular ring. To avoid serious airway complications,the vascular ring should be operated as soon as possible,and the airway stenosis and intracardiac malformation Children suggested concurrent treatment,this can improve the survival rate of surgery and improve the prognosis of children.
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Objective To explore the value of echocardiography in evaluation of pulmonary venous in total anomalous pulmonary venous connection (TAPVC).Methods Fifty-five children with TAPVC were enrolled in the study.The data of echocardiography and CT angiography were retrospectively analyzed and compared with intraoperative findings.Results Totally 55 patients with TAPVC were classified into supra-cardiac type (n=24),cardiac type (n=20),infra-cardiac type (n=7) and mixed type (n=4) according to the sites of drainage of pulmonary venous in echocardiography.In 15 patients with obstruction of pulmonary vertical vein,the sites of obstruction in the supra-cardiac type mostly presented between vertical vein and superior vena cava or innominate vein,and the sites of obstruction in the infra-cardiac presented all between vertical vein and hepatic or portal vein.In 4 patients with pulmonary vein stenosis,3 cases with local pulmonary vein stenosis were all cardiac type,which presented between individual pulmonary vein and common confluence or right atrium;1 patient with diffuse pulmonary vein stenosis was infra-cardiac type.In 9 patients of abnormal individual pulmonary vein,8 cases were not detected by echocardiography,but all were detected by CT angiography.Conclusion Echocardiography is able to make more comprehensive evaluation for the pulmonary venous drainage,obstruction,and proximal stenosis of individual pulmonary vein in TAPVC.CT angiography is superior in evaluation of abnormalities of connection and amount of individual pulmonary vein,and imaging of distal pulmonary vein.
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Objective To determine the effect of induction of immune tolerance by intrathymic injection of myelin basic protein (MBP) for treatment of surgical brain injury (SBI) in rats.Methods Twenty-four male SD rats were divided into experimental group,control group and sham group with 8 rats each,according to the random number table.SBI model was established in experimental group and control group.Thymuses were exposed and injected with MBP (experimental group) or saline (control group) respectively.Sham group received craniotomy without durotomy and thymus paracentesis.Modified neurological severity score (MNSS),cerebral edema volume,levels of peripheral blood proinflammatory cytokine interleukin (IL)-2 and anti-inflammatory cytokine IL-4,and CD4 +/CD8 + T-cell ratio were measured at postoperative 1,3,7,14 and 21 d.Results MNSS between control and experimental groups differed significantly at each time point (P ＜ 0.05).Compared to sham group,MNSS in experimental group was recovered the same value at 21 d (P ＞ 0.05),but in control group remained high over the study (P ＜ 0.05).Less cerebral edema was observed in control and experimental groups than in control group at each time point (P ＜ 0.05),but all were lower than these in sham group (P ＜ 0.05).Lower IL-2 concentrations and higher IL-4 concentrations were observed in experimental group than in control group at 3,7 and 14 d (P ＜0.05).Compared to sham group,IL-2 concentrations in experimental group and IL-4 concentrations in control group revealed no significant differences at each time point (P ＞0.05).CD4 +/CD8 + T-cell ratio between experimental group and control group revealed significant difference at 1,7 and 14 d (P ＜0.05).CD4 +/CD8 + T-cell ratio in experimental group and control group recovered to the same level in sham group at 7 and 21 d(P ＞ 0.05).Conclusion Induction of immune tolerance through intrathymic injection of MBP can reduce neurological deficit and brain edema and facilitate the recovery of function from SBI.