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Petrin AL, Machado-Paula LA, Hinkle A, Hovey L, Awotoye W, Chimenti M, Darbro B, Ribeiro-Bicudo LA, Dabdoub SM, Peter T, Breheny P, Murray J, Van Otterloo E, Rengasamy Venugopalan S, Moreno-Uribe LM. Whole genome sequencing of a family with autosomal dominant features within the oculoauriculovertebral spectrum. MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2024:2024.02.07.24301824. [PMID: 38370836 PMCID: PMC10871465 DOI: 10.1101/2024.02.07.24301824] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/20/2024]
Abstract
Background Oculoauriculovertebral Spectrum (OAVS) encompasses abnormalities on derivatives from the first and second pharyngeal arches including macrostomia, hemifacial microsomia, micrognathia, preauricular tags, ocular and vertebral anomalies. We present genetic findings on a three-generation family affected with macrostomia, preauricular tags and uni- or bilateral ptosis following an autosomal dominant pattern. Methods We generated whole genome sequencing data for the proband, affected parent and unaffected paternal grandparent followed by Sanger sequencing on 23 family members for the top 10 candidate genes: KCND2, PDGFRA, CASP9, NCOA3, WNT10A, SIX1, MTF1, KDR/VEGFR2, LRRK1, and TRIM2 We performed parent and sibling-based transmission disequilibrium tests and burden analysis via a penalized linear mixed model, for segregation and mutation burden respectively. Next, via bioinformatic tools we predicted protein function, mutation pathogenicity and pathway enrichment to investigate the biological relevance of mutations identified. Results Rare missense mutations in SIX1, KDR/VEGFR2, and PDGFRA showed the best segregation with the OAV phenotypes in this family. When considering any of the 3 OAVS phenotypes as an outcome, SIX1 had the strongest associations in parent-TDTs and sib-TDTs (p=0.025, p=0.052) (unadjusted p-values). Burden analysis identified SIX1 (RC=0.87) and PDGFRA (RC=0.98) strongly associated with OAVS severity. Using phenotype-specific outcomes, sib-TDTs identified SIX1 with uni- or bilateral ptosis (p=0.049) and ear tags (p=0.01), and PDGFRA and KDR/VEGFR2 with ear tags (both p<0.01). Conclusion SIX1, PDGFRA, and KDR/VEGFR2 are strongly associated to OAVS phenotypes. SIX1 has been previously associated with OAVS ear malformations and is co-expressed with EYA1 during ear development. Efforts to strengthen the genotype-phenotype co-relation underlying the OAVS are key to discover etiology, family counseling and prevention.
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Affiliation(s)
- A L Petrin
- College of Dentistry and Dental Clinics, University of Iowa, Iowa City, IA, USA
| | - L A Machado-Paula
- College of Dentistry and Dental Clinics, University of Iowa, Iowa City, IA, USA
| | - A Hinkle
- College of Dentistry and Dental Clinics, University of Iowa, Iowa City, IA, USA
| | - L Hovey
- College of Dentistry and Dental Clinics, University of Iowa, Iowa City, IA, USA
| | - W Awotoye
- College of Dentistry and Dental Clinics, University of Iowa, Iowa City, IA, USA
| | - M Chimenti
- Carver College of Medicine, University of Iowa, Iowa City, IA, USA
| | - B Darbro
- Carver College of Medicine, University of Iowa, Iowa City, IA, USA
| | | | - S M Dabdoub
- College of Dentistry and Dental Clinics, University of Iowa, Iowa City, IA, USA
| | - T Peter
- College of Dentistry and Dental Clinics, University of Iowa, Iowa City, IA, USA
| | - P Breheny
- College of Public Health, University of Iowa, Iowa City, IA, USA
| | - J Murray
- Carver College of Medicine, University of Iowa, Iowa City, IA, USA
| | - E Van Otterloo
- College of Dentistry and Dental Clinics, University of Iowa, Iowa City, IA, USA
| | | | - L M Moreno-Uribe
- College of Dentistry and Dental Clinics, University of Iowa, Iowa City, IA, USA
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Celse T, Tingaud-Sequeira A, Dieterich K, Siegfried G, Lecaignec C, Bouneau L, Fannemel M, Salaun G, Laffargue F, Martinez G, Satre V, Vieville G, Bidart M, Soussi Zander C, Turesson AC, Splitt M, Reboul D, Chiesa J, Khau Van Kien P, Godin M, Gruchy N, Goel H, Palmer E, Demetriou K, Shalhoub C, Rooryck-Thambo C, Coutton C. OTX2 duplications: a recurrent cause of oculo-auriculo-vertebral spectrum. J Med Genet 2022; 60:620-626. [DOI: 10.1136/jmg-2022-108678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Accepted: 10/14/2022] [Indexed: 11/13/2022]
Abstract
BackgroundOculo-auriculo-vertebral spectrum (OAVS) is the second most common cause of head and neck malformations in children after orofacial clefts. OAVS is clinically heterogeneous and characterised by a broad range of clinical features including ear anomalies with or without hearing loss, hemifacial microsomia, orofacial clefts, ocular defects and vertebral abnormalities. Various genetic causes were associated with OAVS and copy number variations represent a recurrent cause of OAVS, but the responsible gene often remains elusive.MethodsWe described an international cohort of 17 patients, including 10 probands and 7 affected relatives, presenting with OAVS and carrying a 14q22.3 microduplication detected using chromosomal microarray analysis. For each patient, clinical data were collected using a detailed questionnaire addressed to the referring clinicians. We subsequently studied the effects ofOTX2overexpression in a zebrafish model.ResultsWe defined a 272 kb minimal common region that only overlaps with theOTX2gene. Head and face defects with a predominance of ear malformations were present in 100% of patients. The variability in expressivity was significant, ranging from simple chondromas to severe microtia, even between intrafamilial cases. Heterologous overexpression ofOTX2in zebrafish embryos showed significant effects on early development with alterations in craniofacial development.ConclusionsOur results indicate that properOTX2dosage seems to be critical for the normal development of the first and second branchial arches. Overall, we demonstrated thatOTX2genomic duplications are a recurrent cause of OAVS marked by auricular malformations of variable severity.
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Zhang W, Zhao XY, Wu J, Jin L, Lv J, Gao B, Liu P. Screening and Verification of Molecular Markers and Genes Related to Salt-Alkali Tolerance in Portunus trituberculatus. Front Genet 2022; 13:755004. [PMID: 35211153 PMCID: PMC8861530 DOI: 10.3389/fgene.2022.755004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2021] [Accepted: 01/12/2022] [Indexed: 11/13/2022] Open
Abstract
Salt-alkali tolerance is one of the important breeding traits of Portunus trituberculatus. Identification of molecular markers linked to salt-alkali tolerance is prerequisite to develop such molecular marker-assisted breeding. In this study, Bulked Segregant Analysis (BSA) was used to screen molecular markers associated with salt-alkali tolerance trait in P. trituberculatus. Two DNA mixing pools with significant difference in salt-alkali tolerance were prepared and 94.83G of high-quality sequencing data was obtained. 855 SNPs and 1051 Indels were firstly selected as candidate markers by BSA analysis, out of which, 20 markers were further selected via △index value (close to 0 or 1) and eight of those were successfully verified. In addition, based on the located information of the markers in genome, eight candidate genes related to salt-alkali tolerance were anchored including ubiquitin-conjugating enzyme, aspartate-tRNA ligase, vesicle-trafficking protein, and so on. qPCR results showed that the expression patterns of all these genes changed significantly after salt-alkali stress, suggesting that they play certain roles in salt-alkali adaptation. Our results will provide applicable markers for molecular marker-assisted breeding and help to clarify the mechanisms of salt-alkali adaptation of P. trituberculatus.
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Affiliation(s)
- Wen Zhang
- Key Laboratory of Sustainable Development of Marine Fisheries, Ministry of Agriculture, P.R.China, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China.,College of marine technology and environment, Dalian Ocean University, Dalian, China
| | - Xiao Yan Zhao
- Key Laboratory of Sustainable Development of Marine Fisheries, Ministry of Agriculture, P.R.China, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China
| | - Jie Wu
- Key Laboratory of Sustainable Development of Marine Fisheries, Ministry of Agriculture, P.R.China, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China
| | - Ling Jin
- Key Laboratory of Sustainable Development of Marine Fisheries, Ministry of Agriculture, P.R.China, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China
| | - Jianjian Lv
- Key Laboratory of Sustainable Development of Marine Fisheries, Ministry of Agriculture, P.R.China, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China.,Function Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Baoquan Gao
- Key Laboratory of Sustainable Development of Marine Fisheries, Ministry of Agriculture, P.R.China, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China.,Function Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Ping Liu
- Key Laboratory of Sustainable Development of Marine Fisheries, Ministry of Agriculture, P.R.China, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China.,Function Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
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