Abstract:
:Nijmegen breakage syndrome is an autosomal recessive disorder caused by biallelic mutation in NBN gene. It is characterized by microcephaly, growth retardation, immuno-deficiency and cancer predisposition. The monoallelic carriers of NBN gene are also reported to be at increased risk of developing various types of malignancy. We have investigated an individual with lung cancer from an extended family segregating different types of hereditary cancer over several generations, including lung, breast, ovarian, colon, prostate and renal cancers. By using next generation whole exome sequencing approach, we identified a rare heterozygous frameshift mutation in NBN gene; c.93_94delTG (Ala32HisfsTer4), which is predicted to be pathogenic together with 3 other variants; 2 being in the BRCA1 gene, c.1648A > C (p.Asn550His) and c.536A > G (p.Tyr179Cys), and one in RAD50 gene, c.3539G > A (p.Arg1180Gln). Some of the variants were also found in six out of eight clinically normal relatives, but in different combinations. To our knowledge, this is the first report of NBN gene mutation in an individual with lung cancer in the Arab world. Reporting such findings may aid in variants' risk classification and clinical decision in the future.
journal_name
Fam Cancerjournal_title
Familial cancerauthors
Marafie MJ,Dashti M,Al-Mulla Fdoi
10.1007/s10689-016-9954-9subject
Has Abstractpub_date
2017-07-01 00:00:00pages
389-394issue
3eissn
1389-9600issn
1573-7292pii
10.1007/s10689-016-9954-9journal_volume
16pub_type
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