Volume 120, Issue 5 pp. 836-845

Abnormal telomere metabolism in Fanconi's anaemia correlates with genomic instability and the probability of developing severe aplastic anaemia

Xiaxin Li

Xiaxin Li

Bone Marrow Biology Laboratory, DRED University, Paris, and Bone Marrow Transplant Unit AP/HP,

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François Leteurtre

François Leteurtre

Hemato-Immunology Research Laboratory, DRM, DSV, CEA,

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Vanderson Rocha

Vanderson Rocha

Bone Marrow Biology Laboratory, DRED University, Paris, and Bone Marrow Transplant Unit AP/HP,

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Philippe Guardiola

Philippe Guardiola

Bone Marrow Biology Laboratory, DRED University, Paris, and Bone Marrow Transplant Unit AP/HP,

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Roland Berger

Roland Berger

INSERM U-434,

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Marie-Therese Daniel

Marie-Therese Daniel

Hematology Laboratory, and

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Maria Helena Noguera

Maria Helena Noguera

Hematology Laboratory, and

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Odile Maarek

Odile Maarek

Hematology Laboratory, and

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Gwenaëlle L. E. Roux

Gwenaëlle L. E. Roux

Bone Marrow Biology Laboratory, DRED University, Paris, and Bone Marrow Transplant Unit AP/HP,

Hemato-Immunology Research Laboratory, DRM, DSV, CEA,

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Pauline De La Salmonière

Pauline De La Salmonière

Medical Biostatistcs Department, Institut Universitaire d'Hématologie, Hôpital Saint-Louis, 75475 Paris, France

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Patrice Richard

Patrice Richard

Bone Marrow Biology Laboratory, DRED University, Paris, and Bone Marrow Transplant Unit AP/HP,

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Eliane Gluckman

Eliane Gluckman

Bone Marrow Biology Laboratory, DRED University, Paris, and Bone Marrow Transplant Unit AP/HP,

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First published: 03 March 2003
Citations: 40
Professor E. Gluckman, Head of Bone Marrow Biology Laboratory and Bone Marrow Transplant Unit, Hospital Saint-Louis, 1 Avenue Claude Vellefaux, 75475 Paris cedex 10, France. E-mail: [email protected]

Present addresses: Indiana University School of Medicine, Indianapolis, IN, USA.†CEA Saclay, France.‡IGR, Villejuif, France.

Abstract

Summary. Fanconi's anaemia (FA) is an autosomal recessive disorder characterized by progressive bone marrow failure and a susceptibility to cancer. Haematopoietic stem cell transplantation is the only curative method for restoring normal haematopoiesis, and survival is improved if the transplant is carried out before severe complications occur. However, the evolution of FA is difficult to predict because of the absence of known prognostic factors and the unknown function of the genes involved. In studying 71 FA patients, a correlation was found between severe aplastic anaemia (SAA) and the individual annual telomere-shortening rate (IATSR) in peripheral blood mononuclear cells (P < 10−3). Spontaneous apoptosis was highest in SAA patients or patients with high IATSR (> 200 bp/year) (P < 0·01, n = 18). Univariate and multivariate analyses showed that significant relative risks for evolution towards SAA were high IATSR (P < 10−4), and that a high number of chromosome breakages occurred in the presence of nitrogen mustard (P < 0·001). A high IATSR was also associated with an increased frequency of malignancy (P < 0·01). Thus, these biological parameters were related to the spontaneous evolution of FA and could be used as prognostic factors. These data indicated that telomeres might play a role in the evolution of bone marrow failure and malignant transformation in FA.

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