Dendritic cell subsets and function in newborns from mothers of different HBV infection status / 中华实验和临床病毒学杂志

<p><b>OBJECTIVE</b>The aim of this study was to explore the frequency of mDC and pDC and expression of surface markers of the neonates and to discuss the effect of different status of HBV infection of mother on biological characteristics of DC.</p><p><b>METHODS</b>Umbilicus cord blood in neonates of HBeAg positive HBV infected mother, HBeAg negative HBV infected mother, and normal mother were collected respectively; peripheral blood of healthy adults were selected as control group. Flow cytometry was employed to detect frequency of the mDC and its expression of CD86, frequency of pDC and its expression of CD80, CD83, CD86, and FlowJo software was used to compare these indicators among the groups.</p><p><b>RESULTS</b>Compared with control group, the frequency of mDC of cord blood (0.29 +/- 0.16 vs 0.81 +/- 0.17), CD86 positive rate of mDC (10.72 +/- 10.01 vs 32.13 +/- 7.46), the frequency of pDC (0.15 +/- 0.07 vs 0.30 +/- 0.07), and CD86/CD83 positive rate of pDC (31.61 +/- 12.81 vs 74.96 +/- 9.78; 42.66 +/- 20.83 vs 82.00 +/- 6.94) were lower (t = -7.86, P = 0.00; t = -5.36, P = 0.00; t = -5.43, P = 0.00; t = -8.49. P = 0.00; t = -4.90, P = 0.00).</p><p><b>CONCLUSIONS</b>The frequency of mDC and pDC in umbilical cord blood was lower than the peripheral blood of healthy adult, which was the possible mechanism of newborns easier to chronicity after the infection of hepatitis B virus. A significant correlation was found between different status of HBV infection and costimulatory molecule CD86 positive rate of mDC, but not for the frequency of mDC and pDC, and the expression of pDC molecules.</p>

The correlation study of HBV serological index in neonate's venus, cord blood and mother's venus blood / 中华实验和临床病毒学杂志

<p><b>OBJECTIVE</b>In this study, we discussed the consistency and correlation of HBV serological indexes between neonates' venous blood and cord blood whose mothers had chronical HBV infection, as well as the correlation of thoses indexes with the mothers'.</p><p><b>METHOD</b>Chronically HBV infected mothers who were postive of both HBsAg and HBeAg and also had a HBV DNA virus load above 10(5) copies/ ml and their infants were enrolled. The mothers' venous blood were collected before delivery. The neonates' cord blood were collected at birth after removal of contaminants and disinfected with alcohol on the cord's surface, and the venous blood were collected before hepatitis B virus immune globin(HBIG) and hepatitis B vaccine were given. The levels of HBsAg, anti-HBs, HBeAg and anti-HBeAg were tested with Abbott microparticle chemiluminescence method (Abbott Laboratories, Abbott Architac i2000). HBV DNA quantification were tested by COBAS TagMan real-time PCR Assay.</p><p><b>RESULTS</b>383 mothers and their infants were enrolled. The positive rates of HBsAg in cord blood and venous blood were 61.2% and 63.9%. The positive rates of HBeAg level in cord blood and venous blood were 83.2% and 83.5%. The positive rates of HBV DNA level in cord blood and venous blood were 56.0% and 59.4%. The state of HBsAg, HBeAg and HBV DNA in cord blood and venous blood were consistency, and significant correlation was observed in their levels with correlation coefficients of 0.766, 0.857, and 0.692, respectively (P < 0.000). Significant correlation of the HBeAg levels were observed between mothers' venous blood and neonates' venous blood, as well as neonates' cord blood with correlation coefficients of 0.362 and 0.352 (P < 0.000). However, there was no significant correlation of HBsAg levels between them (r = 0.023, P = 0.785; r = 0.04, P = 0.604).</p><p><b>CONCLUSIONS</b>The HBV serological index of neonate's cord blood could reflect the HBV serological indexes in venous blood because of the good correlation and consistency between them.</p>