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Case Reports
. 2007 Feb;44(2):e65.
doi: 10.1136/jmg.2006.043406.

A novel X-linked recessive form of Mendelian susceptibility to mycobaterial disease

Jacinta Bustamante  1 , Capucine Picard, Claire Fieschi, Orchidée Filipe-Santos, Jacqueline Feinberg, Christian Perronne, Ariane Chapgier, Ludovic de Beaucoudrey, Guillaume Vogt, Damien Sanlaville, Arnaud Lemainque, Jean-François Emile, Laurent Abel, Jean-Laurent Casanova
Affiliations
Case Reports

A novel X-linked recessive form of Mendelian susceptibility to mycobaterial disease

Jacinta Bustamante et al. J Med Genet. 2007 Feb.

Abstract

Background: Mendelian susceptibility to mycobacterial disease (MSMD) is associated with infection caused by weakly virulent mycobacteria in otherwise healthy people. Causal germline mutations in five autosomal genes (IFNGR1, IFNGR2, STAT1, IL12RB1, IL12B) and one X-linked (NEMO) gene have been described. The gene products are physiologically related, as they are involved in interleukin 12/23-dependent, interferon gamma-mediated immunity. However, no genetic aetiology has yet been identified for about half the patients with MSMD.

Methods: A large kindred was studied, including four male maternal relatives with recurrent mycobacterial disease, suggesting X-linked recessive inheritance. Three patients had recurrent disease caused by the bacille Calmette-Guérin vaccine, and the fourth had recurrent tuberculosis. The infections showed tropism for the peripheral lymph nodes.

Results: Known autosomal and X-linked genetic aetiologies of MSMD were excluded through genetic and immunological investigations. Genetic linkage analysis of the X-chromosome identified two candidate regions, on Xp11.4-Xp21.2 and Xq25-Xq26.3, with a maximum LOD score of 2.

Conclusion: A new X-linked recessive form of MSMD is reported, paving the way for the identification of a new MSMD-causing gene.

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Conflict of interest statement

Competing interests: None.

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