Role of Hofbauer Cell on Vertical Transmission of Hepatitis B Virus from Mother to Neonate / 实用儿科临床杂志

Objective To investigate the correlation between vertical infection of hepatitis B virus(HBV) and Hofbauer cell in placenta.Methods Placental structural change,the correlation between HBV infection and Hofbauer cell in 14 vertical transmission cases(HBsAg and HBV-DNA seropositive in both mothers and their neonates),62 non-vertical transmission cases(HBsAg and HBV-DNA seropositive in mothers,but HBsAg and HBV-DNA seronegative in their neonates) and 10 controls(HBsAg and HBV-DNA seronegative in both mothers and their neonates) were determined by inmumohistochemical techniques and photomicroscopy.Results 1.necrosis,edema,villi capillary sclerosis,intravillifibrosis,fibrinoial sendimentation,morphokarrioleukocyet,lymphacyte,granulocyte were observed in placentas both vertical transmission cases and non-vertical transmission cases.2.Placental HBsAg postive rate in vertical transmission cases was 100%,but 58% in non-vertical transmission cases.There was significant difference in two groups(P=(0.013)).The positive sign was observed in trophoblast cell,Hofbauer cell and endothelial cell.3.Total Hobauer cell and ones combined with HBV in placentas of vertical transmission cases obviously increased(P

An Immunohistochemical Study of Alpha-1-antichymotrypsin and Lysozyme in the Hofbauer Cells of Human Placentas

The present study has shown that immunohistochemical staining of the human placentas (5 first trimester and 20 full term placentas) for confirmation of the monocytic linease of its macrophage function. We used two macrophage associated glycoprotein; alpha-1-antichymotrypsin (A1Ac) and lysozyme (LSZ). The results from presence or absence of A1Ac & LSZ by immunohistochemical methods can be helpful to deceide the degree of differentiation of macrophage. In al the placentas examined a strong cytoplasmic reaction for A1Ac was seen in the Hofbauer cells, and the same cells of serial sections didn't stain for LSZ. The strong cytoplasmic reaction for A1Ac supports that Hofbauer cells are macrophage, but they didn't stain for LSZ, a bactericidal enzyme, we propose that these cells are not fully differentiated macrophage. The lack of LSZ may have some relevance to the pathogenesis of certain placental infections.

Light and Electron Microscopical Studies on the Stroma of Hydatidiform Mole

Many investigators were interested in the pathogenesis and the relationship between microscopical features and clinical behavior of hydatidiform mole. Trophoblastic cells in the trophoblastic disease were intensively examined histologically, ultrastructurally, immunohistochemically, and with hormone assay method, etc. But ultrastructural study on the stroma of hydatidiform mole was scarcely reported. In this paper, hydatidiform mole was examined at light and electron microscopic levels, with emphasis on the stroma. The results were as follows: 1) Hydropic degeneration of H-mole is more severe in the center of stroma and is not related with the degree of trophoblastic proliferation. Hofbauer cell and vascular structure are extremely rarely observed in the periphery of stroma which has relatively preserved cellular components. 2) Basement membrane is sometimes separated from trophoblastic layer. Degenerated cells in the stroma contain vacuoles, autophagosomes, and lipid droplets. Collagen is abundant in the loose interstitium. Hofbauer cells have no lysosome or phagosome. Vascular lumen is patient and endothelial cells are degenerated. From the above results, H-mole may be produced due to abnormal changes of trophoblasts and stromal changes may be a secondary process, so called autolysis. Hofbauer cells are not engaged in the stromal degeneration and may be different from usual tissue macrophages.