Abstract:
:Complex microphthalmia is characterized by small eyes with additional abnormalities that may include anterior segment dysgenesis. While many genes are known, a genetic cause is identified in only 4-30% of microphthalmia, with the lowest rate in unilateral cases. We identified four novel pathogenic loss-of-function alleles in PRR12 in families affected by complex microphthalmia and/or Peters anomaly, including two de novo, the first dominantly transmitted allele, as well as the first splicing variant. The ocular phenotypes were isolated with no additional systemic features observed in two unrelated families. Remarkably, ocular phenotypes were asymmetric in all individuals and unilateral (with structurally normal contralateral eye) in three. There are only three previously reported PRR12 variants identified in probands with intellectual disability, neuropsychiatric disorders, and iris anomalies. While some overlap with previously reported cases is seen, nonsyndromic developmental ocular anomalies are a novel phenotype for this gene. Additional phenotypic expansions included short stature and normal development/cognition, each noted in two individuals in this cohort, as well as absence of neuropsychiatric disorders in all. This study identifies new associations for PRR12 disruption in humans and presents a genetic diagnosis resulting in unilateral ocular phenotypes in a significant proportion of cases.
journal_name
Clin Genetjournal_title
Clinical geneticsauthors
Reis LM,Costakos D,Wheeler PG,Bardakjian T,Schneider A,Fung SSM,University of Washington Center for Mendelian Genomics.,Semina EVdoi
10.1111/cge.13897subject
Has Abstractpub_date
2020-12-13 00:00:00eissn
0009-9163issn
1399-0004pub_type
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journal_title:Clinical genetics
pub_type: 杂志文章
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journal_title:Clinical genetics
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pub_type: 杂志文章
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更新日期:2019-05-01 00:00:00
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journal_title:Clinical genetics
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journal_title:Clinical genetics
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更新日期:2017-07-01 00:00:00
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journal_title:Clinical genetics
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doi:10.1111/j.1399-0004.1995.tb03957.x
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更新日期:2017-08-01 00:00:00
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journal_title:Clinical genetics
pub_type: 杂志文章
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更新日期:1999-08-01 00:00:00
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更新日期:2015-03-01 00:00:00
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更新日期:2014-09-01 00:00:00
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journal_title:Clinical genetics
pub_type: 杂志文章
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更新日期:2015-07-01 00:00:00
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journal_title:Clinical genetics
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