Identification of the first AHI1 gene mutations in nephronophthisis-associated Joubert syndrome

Boris Utsch, John A. Sayer, Massimo Attanasio, Rob Rodrigues Pereira, Michael Eccles, Hans Christian Hennies, Edgar A. Otto, Friedhelm Hildebrandt

Research output: Contribution to journalArticle

60 Citations (Scopus)

Abstract

Joubert syndrome (JBTS) is an autosomal recessive multisystem disease characterized by cerebellar vermis aplasia, mental retardation, muscular hypotonia, an irregular breathing pattern in the neonatal period and abnormal eye movements. Some individuals have progressive renal failure characterized by nephronophthisis (NPHP) and/or retinal dystrophy. Homozygous deletions of NPHP1 on chromosome 2q13 have been identified in individuals with NPHP-associated JBTS. Recently, mutations in AHI1 on chromosome 6q23.3 were found in JBTS patients without NPHP. Here, by direct sequencing, we identify novel truncating mutations within AHI1 in affected patients from two families. One patient had the association of JBTS and NPHP with chronic renal failure. This is the first report of AHI1 mutations causing JBTS associated with NPHP, confirming the clinical and genetic heterogeneity of NPHP.

Original languageEnglish
Pages (from-to)32-35
Number of pages4
JournalPediatric Nephrology
Volume21
Issue number1
DOIs
Publication statusPublished - 1 Jan 2006
Externally publishedYes

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Mutation
Genes
Chromosomes
Retinal Dystrophies
Muscle Hypotonia
Genetic Heterogeneity
Dyskinesias
Eye Movements
Intellectual Disability
Chronic Kidney Failure
Renal Insufficiency
Respiration
Joubert syndrome 1

Cite this

Utsch, Boris ; Sayer, John A. ; Attanasio, Massimo ; Pereira, Rob Rodrigues ; Eccles, Michael ; Hennies, Hans Christian ; Otto, Edgar A. ; Hildebrandt, Friedhelm. / Identification of the first AHI1 gene mutations in nephronophthisis-associated Joubert syndrome. In: Pediatric Nephrology. 2006 ; Vol. 21, No. 1. pp. 32-35.
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Utsch, B, Sayer, JA, Attanasio, M, Pereira, RR, Eccles, M, Hennies, HC, Otto, EA & Hildebrandt, F 2006, 'Identification of the first AHI1 gene mutations in nephronophthisis-associated Joubert syndrome', Pediatric Nephrology, vol. 21, no. 1, pp. 32-35. https://doi.org/10.1007/s00467-005-2054-y

Identification of the first AHI1 gene mutations in nephronophthisis-associated Joubert syndrome. / Utsch, Boris; Sayer, John A.; Attanasio, Massimo; Pereira, Rob Rodrigues; Eccles, Michael; Hennies, Hans Christian; Otto, Edgar A.; Hildebrandt, Friedhelm.

In: Pediatric Nephrology, Vol. 21, No. 1, 01.01.2006, p. 32-35.

Research output: Contribution to journalArticle

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AU - Utsch, Boris

AU - Sayer, John A.

AU - Attanasio, Massimo

AU - Pereira, Rob Rodrigues

AU - Eccles, Michael

AU - Hennies, Hans Christian

AU - Otto, Edgar A.

AU - Hildebrandt, Friedhelm

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AB - Joubert syndrome (JBTS) is an autosomal recessive multisystem disease characterized by cerebellar vermis aplasia, mental retardation, muscular hypotonia, an irregular breathing pattern in the neonatal period and abnormal eye movements. Some individuals have progressive renal failure characterized by nephronophthisis (NPHP) and/or retinal dystrophy. Homozygous deletions of NPHP1 on chromosome 2q13 have been identified in individuals with NPHP-associated JBTS. Recently, mutations in AHI1 on chromosome 6q23.3 were found in JBTS patients without NPHP. Here, by direct sequencing, we identify novel truncating mutations within AHI1 in affected patients from two families. One patient had the association of JBTS and NPHP with chronic renal failure. This is the first report of AHI1 mutations causing JBTS associated with NPHP, confirming the clinical and genetic heterogeneity of NPHP.

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