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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 

Regulation of renal growth and IGFBP-4 expression by triiodothyronine during rat development.

The insulin-like growth factors (IGFs) and insulin-like growth factor binding proteins (IGFBPs), which regulate IGF activity, play a fundamental role in renal cell proliferation and differentiation. The thyroid hormone is considered to be required for kidney development; excess induces local hypertrophy and hyperplasia. The aim of the present study was to investigate the possible involvement of the IGF/IGFBP system in thyroid hormone-induced renal growth during the development of the rat. Our results show that thyroid hormone withdrawal by 6-propyl-2-thiouracil (PTU)-treatment of rats at all ages had no effect on renal IGFBP-4 mRNA levels, whereas the abundance of the serum protein was decreased compared to controls. Intraperitoneal triiodothyronine (T3) administration to hypothyroid rats resulted in renal hypertrophy associated with a significant upregulation of IGFBP-4 expression with increased levels of renal IGFBP-4 mRNA and serum protein. T3-induced upregulation of IGFBP-4 expression suggests the involvement of the local IGF/IGFBP system in T3-induced renal hypertrophy.[1]

References

  1. Regulation of renal growth and IGFBP-4 expression by triiodothyronine during rat development. Voci, A., Demori, n.u.l.l., Bottazzi, C., Fugassa, E. Horm. Metab. Res. (2001) [Pubmed]
 
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