Novel loss-of-function variants in TRIO are associated with neurodevelopmental disorder: case report.

Abstract:

BACKGROUND:Damaging variants in TRIO have been associated with moderate to severe neurodevelopmental disorders in humans. While recent work has delineated the positional effect of missense variation on the resulting phenotype, the clinical spectrum associated with loss-of-function variation has yet to be fully defined. CASE PRESENTATION:We report on two probands with novel loss-of-function variants in TRIO. Patient 1 presents with a severe neurodevelopmental disorder and macrocephaly. The TRIO variant is inherited from his affected mother. Patient 2 presents with moderate developmental delays, microcephaly, and cutis aplasia with a frameshift variant of unknown inheritance. CONCLUSIONS:We describe two patients with neurodevelopmental disorder, macro/microcephaly, and cutis aplasia in one patient. Both patients have loss-of-function variants, helping to further characterize how these types of variants affect the phenotypic spectrum associated with TRIO. We also present the third reported case of autosomal dominant inheritance of a damaging variant in TRIO.

journal_name

BMC Med Genet

journal_title

BMC medical genetics

authors

Schultz-Rogers L,Muthusamy K,Pinto E Vairo F,Klee EW,Lanpher B

doi

10.1186/s12881-020-01159-y

subject

Has Abstract

pub_date

2020-11-10 00:00:00

pages

219

issue

1

issn

1471-2350

pii

10.1186/s12881-020-01159-y

journal_volume

21

pub_type

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