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NDT Advance Access published online on December 23, 2004
Nephrology Dialysis Transplantation, doi:10.1093/ndt/gfh602
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Nephrol Dial Transplant © ERA-EDTA 2004; all rights reserved
Received July 13, 2004
Accepted October 20, 2004

Original Articles

Effects of progesterone and selective oestrogen receptor modulators on chronic allograft nephropathy in rats

Balazs Antus 1*, Shanying Liu 2, Yousheng Yao 2, Hequn Zou 2, Erwei Song 2, Jens Lutz 2, and Uwe Heemann 2

1 Department of Nephrology, Klinikum rechts der Isar, D-81576 Munich, Germany; Semmelweis University, Department of Pathophysiology, H-1089 Budapest, Hungary
2 Department of Nephrology, Klinikum rechts der Isar, D-81576 Munich, Germany

* To whom correspondence should be addressed.
Balazs Antus, E-mail: antbal{at}net.sote.hu



  Abstract

Background. We recently demonstrated that oestrogens ameliorate the progression of chronic allograft nephropathy (CAN). In our present study, we investigated the role of progesterone and selective oestrogen receptor modulators (SERMs) in this process.

Methods. Female Fisher (F344) kidneys were orthotopically transplanted into intact or ovariectomized female Lewis recipients. Ovariectomized recipients were divided into four groups and were treated with either progesterone alone or in combination with oestradiol, oestradiol alone or vehicle. Intact recipients were divided into three groups and were treated with SERMs such as tamoxifen and one of its new derivatives, droloxifene or vehicle. Animals were harvested 24 weeks after transplantation for histological and immunohistological studies as well as for molecular analysis.

Results. Administration of progesterone resulted in increased urinary protein excretion as well as profound glomerulosclerosis and mononuclear cell infiltration. The combined treatment had similar detrimental effects on the development of CAN. In contrast, oestradiol treatment alone improved graft function, reduced glomerulosclerosis and diminished cellular infiltration. SERMs again impaired allograft function and promoted the development of CAN. Renal allograft damage paralleled intragraft mRNA expression of transforming growth factor-{beta}1 in all groups.

Conclusions. Our results suggest that addition of progesterone diminishes the beneficial effects of oestrogens on the development of CAN in rats. Similarly to progesterone, SERMs worsened long-term renal allograft outcome.

Keywords: chronic allograft nephropathy; growth factor; oestradiol; progesterone.
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