Novel association to the proprotein convertase PCSK7 gene locus revealed by analysing soluble transferrin receptor (sTfR) levels

Konrad Oexle, Janina S. Ried, Andrew A. Hicks, Toshiko Tanaka, Caroline Hayward, Mathias Bruegel, Martin Goegele, Peter Lichtner, Bertram Mueller-Myhsok, Angela Doering, Thomas Illig, Christine Schwienbacher, Cosetta Minelli, Irene Pichler, G. Martin Fiedler, Joachim Thiery, Igor Rudan, Alan Wright, Harry Campbell, Luigi FerrucciStefania Bandinelli, Peter P. Pramstaller, H. -Erich Wichmann, Christian Gieger, Juliane Winkelmann, Thomas Meitinger

Research output: Contribution to journalArticlepeer-review

Abstract

The level of body iron storage and the erythropoietic need for iron are indicated by the serum levels of ferritin and soluble transferrin receptor (sTfR), respectively. A meta-analysis of five genome-wide association studies on sTfR and ferritin revealed novel association to the PCSK7 and TMPRSS6 loci for sTfR and the HFE locus for both parameters. The PCSK7 association was the most significant (rs236918, P = 1.1 x 10E-27) suggesting that proprotein convertase 7, the gene product of PCSK7, may be involved in sTfR generation and/or iron homeostasis. Conditioning the sTfR analyses on transferrin saturation abolished the HFE signal and substantially diminished the TMPRSS6 signal while the PCSK7 association was unaffected, suggesting that the former may be mediated by transferrin saturation whereas the PCSK7-associated effect on sTfR generation appears to be more direct.

Original languageEnglish
Pages (from-to)1042-1047
Number of pages6
JournalHuman Molecular Genetics
Volume20
Issue number5
DOIs
Publication statusPublished - 1 Mar 2011

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