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Blood, 1 September 2008, Vol. 112, No. 5, pp. 2089-2091.
Prepublished online as a Blood First Edition Paper on July 2, 2008; DOI 10.1182/blood-2008-05-154740.
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Submitted May 12, 2008
Accepted June 22, 2008
Two nonsense mutations in the TMPRSS6 gene in a patient with microcytic anemia and iron deficiency
Flavia Guillem, Sarah Lawson, Caroline Kannengiesser, Mark Westerman, Carole Beaumont*, and Bernard Grandchamp
AP-HP, Laboratoire de Genetique et Biochimie hormonale, Hopital Bichat, Paris, France
Department of clinical and Biological Haematology, Birmingham Children's Hospital, Birmingham, United Kingdom
Intrinsic LifeSciences, La Jolla, CA, United States
INSERM U773, Universite Paris Diderot, site Bichat, Paris, France
* Corresponding author; email: carole.beaumont{at}inserm.fr.
Genetic causes of hypochromic microcytic anemia include thalassemias and some rare inherited diseases such as DMT1 deficiency. Here, we show that iron deficiency anemia with poor intestinal absorption and defective iron utilization of IV iron is caused by inherited mutations in TMPRSS6, a liver expressed gene which encodes a membrane-bound serine protease of previously unknown role that was recently reported to be a regulator of hepcidin expression.

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