Details

Autor(en) / Beteiligte

• Yang, Xi
• Hoshino, Akihiro
• Taga, Takashi
• Kunitsu, Tomoaki
• Ikeda, Yuhachi
• Yasumi, Takahiro
• Yoshida, Kenichi
• Wada, Taizo
• Miyake, Kunio
• Kubota, Takeo
• Okuno, Yusuke
• Muramatsu, Hideki
• Adachi, Yuichi
• Miyano, Satoru
• Ogawa, Seishi
• Kojima, Seiji
• Kanegane, Hirokazu

Titel

A Female Patient with Incomplete Hemophagocytic Lymphohistiocytosis Caused by a Heterozygous XIAP Mutation Associated with Non-Random X-Chromosome Inactivation Skewed Towards the Wild-Type XIAP Allele

Ist Teil von

• Journal of clinical immunology, 2015-04, Vol.35 (3), p.244-248

Ort / Verlag

Boston: Springer US

Erscheinungsjahr

2015

Link zum Volltext

Quelle

SpringerLink

Beschreibungen/Notizen

• X-linked lymphoproliferative disease (XLP) is a rare inherited immunodeficiency that often leads to hemophagocytic lymphohistiocytosis (HLH). XLP can be classified as XLP1 or XLP2, caused by mutations in SH2D1A and XIAP , respectively. In women, X-chromosome inactivation (XCI) of most X-linked genes occurs on one of the X chromosomes in each cell. The choice of which X chromosome remains activated is generally random, although genetic differences and selective advantage may cause one of the X chromosomes to be preferentially inactivated. Here we describe three patients with pancytopenia, including one female patient, in a Japanese family with a novel XIAP mutation. All three patients exhibited deficient XIAP protein expression, impaired NOD2/XIAP signaling, and augmented activation-induced cell death. In the female patient, the paternally derived X chromosome was non-randomly and exclusively inactivated in her peripheral blood and hair root cells. In contrast to asymptomatic females, this patient exhibied non-random XCI skewed towards the wild-type XIAP allele. This is the first report of a female patient with incomplete HLH resulting from a heterozygous XIAP mutation in association with non-random XCI.