TY - JOUR
T1 - Concurrence of High Levels of Interferons α and β in Cord and Maternal Blood and Simultaneous Presence of Interferon in Trophoblast in an African Population
AU - Ebbesen, Peter
AU - Hager, Henrik
AU - Nørskov-Lauritsen, Niels
AU - Aboagye-Mathiesen, George
AU - Zdravkovic, Milan
AU - Villadsen, Jan
AU - Liu, Xiangdong
AU - Petersen, Peter M.
AU - Bambra, Charanjit
AU - Nyongo, Aggrey
AU - Temmerman, Marleen
AU - Zachar, Vladimir
PY - 1995/2
Y1 - 1995/2
N2 - A high concentration of interferon-α (IFN-α) (>5 U/ml) in cord blood was used as the criterion for establishing our study group. In a collection from deliveries by 269 Kenyan women, 16 such cord samples with matching maternal blood and placental biopsies were identified. These 16 were studied in detail together with 23 randomly selected among those with low cord IFN-α levels. The levels of IFN- in retal blood correlated with levels in their mothers for both IFN-α and β but not for IFN-γ. IFN-α was furthermore demonstrated in villous and decidual trophoblast from 15 (94%) placentae from donors with high IFN-α in the cord blood but not in the placenta of any low IFN level donors. In contrast, IFN-β was not demonstrated in any placenta. These observations suggest simultaneous IFN induction in the three compartments, transplacental IFN transport, or trophoblast production of IFN to both circulations. Looking for IFN inducers, we did serologic tests for nonspecific indicators of inflammation and for specific virus and protozoan infections, but these showed no relation to elevated IFN levels. Immunohistology also revealed no evidence of a number of placental infections. The cause of the high levels of IFN-α could still be infectious but remains unexplained and may be noninfectious.
AB - A high concentration of interferon-α (IFN-α) (>5 U/ml) in cord blood was used as the criterion for establishing our study group. In a collection from deliveries by 269 Kenyan women, 16 such cord samples with matching maternal blood and placental biopsies were identified. These 16 were studied in detail together with 23 randomly selected among those with low cord IFN-α levels. The levels of IFN- in retal blood correlated with levels in their mothers for both IFN-α and β but not for IFN-γ. IFN-α was furthermore demonstrated in villous and decidual trophoblast from 15 (94%) placentae from donors with high IFN-α in the cord blood but not in the placenta of any low IFN level donors. In contrast, IFN-β was not demonstrated in any placenta. These observations suggest simultaneous IFN induction in the three compartments, transplacental IFN transport, or trophoblast production of IFN to both circulations. Looking for IFN inducers, we did serologic tests for nonspecific indicators of inflammation and for specific virus and protozoan infections, but these showed no relation to elevated IFN levels. Immunohistology also revealed no evidence of a number of placental infections. The cause of the high levels of IFN-α could still be infectious but remains unexplained and may be noninfectious.
UR - http://www.scopus.com/inward/record.url?scp=0028946141&partnerID=8YFLogxK
U2 - 10.1089/jir.1995.15.123
DO - 10.1089/jir.1995.15.123
M3 - Article
C2 - 8590315
AN - SCOPUS:0028946141
SN - 1079-9907
VL - 15
SP - 123
EP - 128
JO - Journal of Interferon and Cytokine Research
JF - Journal of Interferon and Cytokine Research
IS - 2
ER -