Very short telomere length by flow fluorescence in situ hybridization identifies patients with dyskeratosis congenita
Publisher DOI
PubMed ID
17468339
Abstract
Dyskeratosis congenita (DC) is an inherited bone marrow failure syndrome in which the known susceptibility genes (DKC1, TERC, and TERT) belong to the telomere maintenance pathway; patients with DC have very short telomeres. We used multicolor flow fluorescence in situ hybridization analysis of median telomere length in total blood leukocytes, granulocytes, lymphocytes, and several lymphocyte subsets to confirm the diagnosis of DC, distinguish patients with DC from unaffected family members, identify clinically silent DC carriers, and discriminate between patients with DC and those with other bone marrow failure disorders. We defined "very short" telomeres as below the first percentile measured among 400 healthy control subjects over the entire age range. Diagnostic sensitivity and specificity of very short telomeres for DC were more than 90% for total lymphocytes, CD45RA+/CD20- naive T cells, and CD20+ B cells. Granulocyte and total leukocyte assays were not specific; CD45RA- memory T cells and CD57+ NK/NKT were not sensitive. We observed very short telomeres in a clinically normal family member who subsequently developed DC. We propose adding leukocyte subset flow fluorescence in situ hybridization telomere length measurement to the evaluation of patients and families suspected to have DC, because the correct diagnosis will substantially affect patient management.
Date Issued
2007
Publication Type
Article
Language(s)
en
Author(s)
Alter, Blanche P | |
Baerlocher, Gabriela M. | |
Savage, Sharon A | |
Chanock, Stephen J | |
Weksler, Babette B | |
Willner, Judith P | |
Peters, June A | |
Giri, Neelam | |
Lansdorp, Peter M |
Additional Credits
Journal
Blood
Publisher
American Society of Hematology
ISSN
0006-4971
ISBN
17468339
Access(Rights)
metadata.only