Homozygosity mapping in consanguineous families reveals extreme heterogeneity of non-syndromic autosomal recessive mental retardation and identifies 8 novel gene loci

Hossein Najmabadi, Mohammad Mahdi Motazacker, Masoud Garshasbi, Kimia Kahrizi, Andreas Tzschach, Wei Chen, Farkhondeh Behjati, Valeh Hadavi, Sahar Esmaeeli Nieh, Seyedeh Sedigheh Abedini, Reza Vazifehmand, Saghar Ghasemi Firouzabadi, Payman Jamali, Masoumeh Falah, Seyed Morteza Seifati, Annette Grüters, Steffen Lenzner, Lars R. Jensen, Franz Rüschendorf, Andreas W. KussH. Hilger Ropers

Research output: Contribution to journalReview article*Academicpeer-review


Autosomal recessive gene defects are arguably the most important, but least studied genetic causes of severe cognitive dysfunction. Homozygosity mapping in 78 consanguineous Iranian families with nonsyndromic autosomal recessive mental retardation (NS-ARMR) has enabled us to determine the chromosomal localization of at least 8 novel gene loci for this condition. Our data suggest that in the Iranian population NS-ARMR is very heterogeneous, and they argue against the existence of frequent gene defects that account for more than a few percent of the cases
Original languageEnglish
Pages (from-to)43-48
JournalHuman genetics
Issue number1
Publication statusPublished - 2007

Cite this