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*Substance via MeSH
Medline Plus Health Information
*High Risk Pregnancy
*Pregnancy Loss

Journal of Clinical Endocrinology & Metabolism, Vol 81, 2925-2929, Copyright © 1996 by Endocrine Society

ARTICLES

Decreased type IV collagen expression by human decidual tissues in spontaneous abortion

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

To provide some insight into the etiology of spontaneous abortion, the expression of type IV collagen was investigated in human decidual tissues obtained after spontaneous abortion (n = 17) and normal pregnancy (n = 22). Indirect immunofluorescent staining was performed for type I, III, and IV collagen as well as laminin, and Northern blot analysis was conducted to assess the expression of messenger ribonucleic acid for the alpha 1(IV) chain. Immunohistochemical analysis did not reveal any significant differences between normal pregnancy and spontaneous abortion with respect to interstitial collagens (type I and III collagen) and laminin in the decidual tissue. However, although pericellular immunostaining for type IV collagen was recognized around the decidual cells in normal pregnancy, very weak or no staining was observed in spontaneous abortion. Northern blot analysis revealed that the decidual expression of messenger ribonucleic acid for the alpha 1(IV) chain was significantly reduced in spontaneous abortion compared to that in normal pregnancy (P < 0.001). These results suggest that type IV collagen might play an important role in the maintenance of pregnancy and that decreased expression of this collagen could be associated with spontaneous abortion.


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Copyright © 1996 by The Endocrine Society