Cited by 725Telomeres, Telomerase, and SenescenceBlood disorders and treatmentsAcute Myeloid Leukemia Research

The DOI matches its Crossref record; 52 of the 52 references it cites were found in a registry or an index.

Mutations in TERT, the Gene for Telomerase Reverse Transcriptase, in Aplastic Anemia

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Abstract

BACKGROUND: Mutations in TERC, the gene for the RNA component of telomerase, cause short telomeres in congenital aplastic anemia and in some cases of apparently acquired hematopoietic failure. We investigated whether mutations in genes for other components of telomerase also occur in aplastic anemia. METHODS: We screened blood or marrow cells from 124 patients with apparently acquired aplastic anemia and 282 control subjects for sequence variations in the TERT, DKC1, NHP2, and NOP10 genes; an additional 81 patients and 246 controls were examined for genetic variations in TERT. Telomere lengths and the telomerase activity of peripheral-blood leukocytes were evaluated in patients carrying genetic variants. Identified mutations were transfected into telomerase-deficient cell lines to examine their effects and their mechanism of action on telomerase function. RESULTS: Five heterozygous, nonsynonymous mutations (which cause an amino acid change in the corresponding protein) were identified in TERT, the gene for the telomerase reverse transcriptase catalytic enzyme, among seven unrelated patients. Leukocytes from these patients had short telomeres and low telomerase enzymatic activity. In three of these patients, the mutation was also detected in buccal mucosa cells. Family members carrying the mutations also had short telomeres and reduced telomerase activity but no evident hematologic abnormality. The results of coexpression of wild-type TERT and TERT with aplastic anemia-associated mutations in a telomerase-deficient cell line suggested that haploinsufficiency was the mechanism of telomere shortening due to TERT mutations. CONCLUSIONS: Heterozygous mutations in the TERT gene impair telomerase activity by haploinsufficiency and may be risk factors for marrow failure.

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  1. Alter BP. Inherited bone marrow failure syndromes: introduction. In: Young NS, Alter BP, eds. Aplastic anemia, acquired and inherited. Philadelphia: W.B. Saunders, 1994:271-4.

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Metadata

Authors
Yamaguchi, H., Calado, R. T., Ly, H., Kajigaya, S., Baerlocher, G. M., Chanock, S. J., Lansdorp, P. M., & Young, N. S.
Affiliations
  • National Institutes of Health (US)
  • National Heart, Lung, and Blood Institute (US)
  • Emory University (US)
  • Terry Fox Research Institute (CA)
  • University of British Columbia (CA)
Venue
New England Journal of Medicine
Published
2005-04-07
Volume
352
Issue
14
Pages
1413-1424
ISSN
  • 0028-4793 (ISSN-L)
  • 1533-4406
OpenAlex
W2037236933
Cited by
723
References
52
Citations by year
2026: 14 · 2025: 12 · 2024: 27 · 2023: 23 · 2022: 26 · 2021: 21 · 2020: 27 · 2019: 28 · 2018: 28 · 2017: 39 · 2016: 23 · 2015: 37 · 2014: 49 · 2013: 44 · 2012: 32
FWCI
30.18
Type
journal article
Language
en
Open access
Locations
  • New England Journal of Medicine (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Telomeres, Telomerase, and Senescence
  • Health Sciences › Medicine › Hematology › Blood disorders and treatments
  • Health Sciences › Medicine › Hematology › Acute Myeloid Leukemia Research
Keywords
TERT mutation, telomerase reverse transcriptase, aplastic anemia, telomere shortening, haploinsufficiency, telomerase activity, DKC1, NHP2, NOP10, hematopoietic failure, non-synonymous mutations, leukocytes
MeSH terms
Adult, Aged, Anemia, Aplastic, Bone Marrow Cells, DNA Mutational Analysis, DNA-Binding Proteins, Female, Heterozygote, Humans, Male, Middle Aged, Mutation, Risk Factors, RNA, Gene Expression, Case-Control Studies, Polymerase Chain Reaction, Telomere, Telomerase

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