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Woodbine_et_al-The_clinical_impact_of_deficiency_in_DNA_non-homologous_end-joining.pdf (1.54 MB)

Reprint of “The clinical impact of deficiency in DNA non-homologousend-joining”

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posted on 2023-06-08, 22:02 authored by Lisa Woodbine, Andrew R Gennery, Penny Jeggo
DNA non-homologous end-joining (NHEJ) is the major DNA double strand break (DSB) repair pathway inmammalian cells. Defects in NHEJ proteins confer marked radiosensitivity in cell lines and mice models,since radiation potently induces DSBs. The process of V(D)J recombination functions during the devel-opment of the immune response, and involves the introduction and rejoining of programmed DSBs togenerate an array of diverse T and B cells. NHEJ rejoins these programmed DSBs. Consequently, NHEJdeficiency confers (severe) combined immunodeficiency – (S)CID – due to a failure to carry out V(D)Jrecombination efficiently. NHEJ also functions in class switch recombination, another step enhancing Tand B cell diversity. Prompted by these findings, a search for radiosensitivity amongst (S)CID patientsrevealed a radiosensitive sub-class, defined as RS-SCID. Mutations in NHEJ genes, defining human syn-dromes deficient in DNA ligase IV (LIG4 Syndrome), XLF-Cernunnos, Artemis or DNA-PKcs, have beenidentified in such patients. Mutations in XRCC4 or Ku70,80 in patients have not been identified. RS-SCIDpatients frequently display additional characteristics including microcephaly, dysmorphic facial featuresand growth delay. Here, we overview the clinical spectrum of RS-SCID patients and discuss our currentunderstanding of the underlying biology.

History

Publication status

  • Published

File Version

  • Published version

Journal

DNA Repair

ISSN

1568-7864

Publisher

Elsevier

Volume

17

Page range

9-20

Department affiliated with

  • Sussex Centre for Genome Damage Stability Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2015-08-04

First Open Access (FOA) Date

2015-08-04

First Compliant Deposit (FCD) Date

2015-08-04

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