Expanding the genetic spectrum of choroideremia in an Australian cohort: report of five novel CHM variants

Terri L. McLaren, John N. De Roach, Jennifer A. Thompson, Fred K. Chen, David A. Mackey, Ling Hoffmann, Isabella R. Urwin, Tina M. Lamey

Research output: Contribution to journalArticle

Abstract

Choroideremia is an X-linked chorioretinal dystrophy caused by mutations in the CHM gene. Several CHM gene replacement clinical trials are in advanced stages. In this study, we report the molecular confirmation of choroideremia in 14 Australian families sourced from the Australian Inherited Retinal Disease Registry and DNA Bank. Sixteen males (14 symptomatic) and 18 females (4 symptomatic; 14 obligate carriers) were identified for analysis. Participants’ DNA was analyzed for disease-causing CHM variants by Sanger sequencing, TaqMan qPCR and targeted NGS. We report phenotypic and genotypic data for the 14 symptomatic males and four females manifesting disease symptoms. A pathogenic or likely pathogenic CHM variant was detected in all families. Eight variants were previously reported, and five were novel. Two de novo variants were identified. We previously reported the molecular confirmation of choroideremia in 11 Australian families. This study expands the CHM genetically confirmed Australian cohort to 32 males and four affected carrier females.

Original languageEnglish
Article number35
JournalHuman Genome Variation
Volume7
Issue number1
DOIs
Publication statusPublished - 1 Dec 2020

Fingerprint Dive into the research topics of 'Expanding the genetic spectrum of choroideremia in an Australian cohort: report of five novel CHM variants'. Together they form a unique fingerprint.

Cite this