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Molecular Human Reproduction, Vol 3, 725-728, Copyright © 1997 by Oxford University Press

JOURNAL ARTICLE

Increase in the relative level of type V collagen in the placentae of patients with pre-eclampsia

M Iwahashi, A Ooshima and R Nakano
Department of Obstetrics and Gynaecology, Wakayama Medical College, Japan.

To obtain some insight into the extracellular matrix in the human placenta, we investigated the composition of collagens purified from the placentae of patients with pre-eclampsia and compared it with normal placentae. Collagen was extracted from the placentae of both normal and pre-eclampsia pregnancies during the third trimester. The relative amounts of various collagens were evaluated by sodium dodecyl sulphate-polyacrylamide gel electrophoresis. The ratio of the intensity of the band corresponding to the alpha 1 (III) chain with that of the alpha 1 (I) chain in placentae of pre-eclampsia was significantly lower than in normal placentae (P < 0.05). In contrast, the ratio of the intensity of the band corresponding to the alpha 1 (V) chain with that of the alpha 1 (I) chain in placentae of pre-eclampsia was significantly higher than in normal placentae (P < 0.05). The results suggest that an increased level of type V collagen relative to type I collagen in the placentae of pre-eclampsia might be closely associated with the disturbance to trophoblastic cell functions and the supply of nutrients to the developing fetus necessary for the maintenance of pregnancy.
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