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Gouy B, Decorsière A, Desgraupes S, Duan W, Ouyang H, Wang YE, Yeh EA, Palazzo AF, Moraes TJ, Nisole S, Arhel NJ. Rapid and inexpensive bedside diagnosis of RAN binding protein 2-associated acute necrotizing encephalopathy. Front Neurol 2023; 14:1282059. [PMID: 38046586 PMCID: PMC10690583 DOI: 10.3389/fneur.2023.1282059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Accepted: 11/01/2023] [Indexed: 12/05/2023] Open
Abstract
Acute necrotizing encephalopathy 1 (ANE1) is a very rare disorder associated with a dominant heterozygous mutation in the RANBP2 (RAN binding protein 2) gene. ANE1 is frequently triggered by a febrile infection and characterized by serious and irreversible neurological damage. Although only a few hundred cases have been reported, mutations in RANBP2 are only partially penetrant and can occur de novo, suggesting that their frequency may be higher in some populations. Genetic diagnosis is a lengthy process, potentially delaying definitive diagnosis. We therefore developed a rapid bedside qPCR-based tool for early diagnosis and screening of ANE1 mutations. Primers were designed to specifically assess RANBP2 and not RGPD (RANBP2 and GCC2 protein domains) and discriminate between wild-type or mutant RANBP2. Nasal epithelial cells were obtained from two individuals with known RANBP2 mutations and two healthy control individuals. RANBP2-specific reverse transcription followed by allele-specific primer qPCR amplification confirmed the specific detection of heterozygously expressed mutant RANBP2 in the ANE1 samples. This study demonstrates that allele-specific qPCR can be used as a rapid and inexpensive diagnostic tool for ANE1 using preexisting equipment at local hospitals. It can also be used to screen non-hospitalized family members and at risk-population to better establish the frequency of non-ANE-associated RANBP2 mutations, as well as possible tissue-dependent expression patterns. Systematic review registration The protocol was registered in the international prospective register of systematic reviews (PROSPERO- CRD42023443257).
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Affiliation(s)
- Benoît Gouy
- Institut de Recherche en Infectiologie de Montpellier, University of Montpellier, Montpellier, France
- Master de Biologie, École Normale Supérieure de Lyon, Université Claude Bernard Lyon 1, Université de Lyon, Lyon, France
| | - Adrien Decorsière
- Institut de Recherche en Infectiologie de Montpellier, University of Montpellier, Montpellier, France
| | - Sophie Desgraupes
- Institut de Recherche en Infectiologie de Montpellier, University of Montpellier, Montpellier, France
| | - Wenming Duan
- Program in Translational Medicine, The Hospital for Sick Children Research Institute, Toronto, ON, Canada
| | - Hong Ouyang
- Program in Translational Medicine, The Hospital for Sick Children Research Institute, Toronto, ON, Canada
| | - Yifan E. Wang
- Department of Biochemistry, University of Toronto, Toronto, ON, Canada
| | - E. Ann Yeh
- Department of Pediatrics, Division of Neurology, The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada
- Division of Neuroscience and Mental Health, The Hospital for Sick Children Research Institute, University of Toronto, Toronto, ON, Canada
| | | | - Theo J. Moraes
- Program in Translational Medicine, The Hospital for Sick Children Research Institute, Toronto, ON, Canada
- Department of Pediatrics, Division of Respiratory Medicine, The Hospital for Sick Children, Toronto, ON, Canada
| | - Sébastien Nisole
- Institut de Recherche en Infectiologie de Montpellier, University of Montpellier, Montpellier, France
| | - Nathalie J. Arhel
- Institut de Recherche en Infectiologie de Montpellier, University of Montpellier, Montpellier, France
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Arhel NJ, Field MC. Biomedical implications of nuclear transport. FEBS Lett 2023; 597:2499-2500. [PMID: 37874774 DOI: 10.1002/1873-3468.14752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2023]
Affiliation(s)
- Nathalie J Arhel
- Institut de Recherche en Infectiologie de Montpellier (IRIM), CNRS UMR9004, Université de Montpellier, France
| | - Mark C Field
- School of Life Sciences, University of Dundee, UK
- Institute of Parasitology, Biology Centre, Czech Academy of Sciences, České Budějovice, Czech Republic
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