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Peng L, Niu Z, Chen J, Wan T, Wu D, Yang Y, Wang G, Yang L, Huang W, Chen Z. Association of genetic polymorphisms of VAX1, MAFB, and NTN1 with nonsyndromic cleft lip with or without cleft palate in Chinese population. Mol Genet Genomics 2022; 297:553-559. [PMID: 35212839 DOI: 10.1007/s00438-022-01871-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Accepted: 02/08/2022] [Indexed: 12/09/2022]
Abstract
Nonsyndromic cleft lip with or without palate (NSCL/P) is a common birth defect involving genetic factors. We conducted this case-control study to verify the association of ten single-nucleotide polymorphisms (SNPs) of six genes (VAX1, MAFB, PAX7, ABCA4, NTN1, and NOG) with NSCL/P in the Chinese population. The study included 249 NSCL/P patients, 62 nonsyndromic cleft palate only (NSCPO) patients and 480 controls. Three loci, namely, VAX1 rs7078160, MAFB rs11696257, and NTN1 rs4791774, were associated with NSCL/P (Bonferroni method adjusted p values were 0.020, 0.00031, and 0.030, respectively). We also found that the disease risk of individuals carrying both VAX1 rs7078160 and NTN1 rs4791774 was higher than those carrying only one of them (p = 4.50 × 10-4 and 6.03 × 10-3, respectively). SNPs of genes VAX1 rs7078160, MAFB rs11696257, and NTN1 rs4791774 increased NSCL/P risk in the Chinese population.
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Affiliation(s)
- Li Peng
- Department of Orthodontics, Shanghai Key Laboratory of Stomatology, Shanghai Ninth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Zhenmin Niu
- Shanghai-MOST Key Laboratory of Health and Disease Genomics, Chinese National Human Genome Center, Shanghai Institute for Biomedical and Pharmaceutical Technologies, Shanghai, China.
| | - Jiapei Chen
- Department of Orthodontics, Shanghai Key Laboratory of Stomatology, Shanghai Ninth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Teng Wan
- Department of Oral and Maxillofacial Surgery, Shanghai Key Laboratory of Stomatology, Ninth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Dandan Wu
- Department of Oral and Maxillofacial Surgery, Shanghai Key Laboratory of Stomatology, Ninth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yusheng Yang
- Department of Oral and Maxillofacial Surgery, Shanghai Key Laboratory of Stomatology, Ninth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Guomin Wang
- Department of Oral and Maxillofacial Surgery, Shanghai Key Laboratory of Stomatology, Ninth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Lin Yang
- Shanghai-MOST Key Laboratory of Health and Disease Genomics, Chinese National Human Genome Center, Shanghai Institute for Biomedical and Pharmaceutical Technologies, Shanghai, China
| | - Wei Huang
- Shanghai-MOST Key Laboratory of Health and Disease Genomics, Chinese National Human Genome Center, Shanghai Institute for Biomedical and Pharmaceutical Technologies, Shanghai, China.
| | - Zhenqi Chen
- Department of Orthodontics, Shanghai Key Laboratory of Stomatology, Shanghai Ninth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China.
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Nguyen DM, Suzuki S, Imura H, Niimi T, Furukawa H, Ta TV, Tong SM, Nguyen TT, Pham LNG, Tran DL, Natsume N. Family based and case-control designs reveal an association of TFAP2A in nonsyndromic cleft lip only among Vietnamese population. Mol Genet Genomic Med 2021; 9:e1754. [PMID: 34310873 PMCID: PMC8457689 DOI: 10.1002/mgg3.1754] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Accepted: 07/08/2021] [Indexed: 12/19/2022] Open
Abstract
Aims Dozens of causative genes and their mechanisms of nonsyndromic cleft lip with or without cleft palate (NSCL/P) were revealed through genome‐wide association and linkage studies. Results were, however, not always replicated in different populations or methodologies. This study used case–control and family based approaches to investigate the etiology of NSCL/P and its two subtypes: nonsyndromic cleft lip only (NSCLO) and nonsyndromic cleft lip and palate (NSCLP) among the Vietnamese population. Methods Two hundred and seventeen NSCL/P case‐parent trios (one affected child and two parents), including 105 NSCLO and 112 NSCLP were involved for a family based design; and 273 ethnic and region‐matched healthy controls with no cleft history in their families were recruited for a case–control design. Three SNPs consisting of TFAP2A (rs1675414 and rs303048) and 8q24 (rs987525) were genotyped using the TaqMan SNP genotyping assay. Results TFAP2A rs1675414 was associated with NSCLO, replicated by both case‐control and family based tests. Other SNPs yielded no evidence of susceptibility to NSCL/P or two subtypes. Conclusion The current investigation suggests an intriguing role of TFAP2A in the etiology of NSCLO among the Vietnamese population. This study used case‐control and family‐based approaches to investigate the etiology of NSCL/P and its two subtypes: nonsyndromic cleft lip only (NSCLO), nonsyndromic cleft lip and palate (NSCLP) among Vietnamese population. TFAP2A rs1675414 was associated with NSCLO, replicated by both case‐control and family‐based tests.
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Affiliation(s)
- Duc Minh Nguyen
- Division of Research and Treatment for Oral Maxillofacial Congenital Anomalies, Aichi Gakuin University, Nagoya, Japan.,School of Odonto-stomatology, Hanoi Medical University, Hanoi, Vietnam
| | - Satoshi Suzuki
- Division of Research and Treatment for Oral Maxillofacial Congenital Anomalies, Aichi Gakuin University, Nagoya, Japan
| | - Hideto Imura
- Division of Research and Treatment for Oral Maxillofacial Congenital Anomalies, Aichi Gakuin University, Nagoya, Japan.,Cleft Lip and Palate Center, Aichi Gakuin Dental Hospital, Nagoya, Japan.,Division of Speech, Hearing, and Language, Aichi Gakuin Dental Hospital, Nagoya, Japan
| | - Teruyuki Niimi
- Division of Research and Treatment for Oral Maxillofacial Congenital Anomalies, Aichi Gakuin University, Nagoya, Japan.,Cleft Lip and Palate Center, Aichi Gakuin Dental Hospital, Nagoya, Japan.,Division of Speech, Hearing, and Language, Aichi Gakuin Dental Hospital, Nagoya, Japan
| | - Hiroo Furukawa
- Division of Research and Treatment for Oral Maxillofacial Congenital Anomalies, Aichi Gakuin University, Nagoya, Japan.,Cleft Lip and Palate Center, Aichi Gakuin Dental Hospital, Nagoya, Japan.,Division of Speech, Hearing, and Language, Aichi Gakuin Dental Hospital, Nagoya, Japan
| | - Thanh-Van Ta
- Center for Gene and Protein Research, Hanoi Medical University, Hanoi, Vietnam
| | - Son Minh Tong
- School of Odonto-stomatology, Hanoi Medical University, Hanoi, Vietnam
| | - Tra Thu Nguyen
- School of Odonto-stomatology, Hanoi Medical University, Hanoi, Vietnam.,Graduate School of Medicine, Nagoya University, Nagoya, Japan
| | - Loc Nguyen Gia Pham
- Division of Research and Treatment for Oral Maxillofacial Congenital Anomalies, Aichi Gakuin University, Nagoya, Japan.,Odonto - Maxillo Facial Hospital of Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Duy Le Tran
- Nguyen Dinh Chieu General Hopsital, Ben Tre, Vietnam
| | - Nagato Natsume
- Division of Research and Treatment for Oral Maxillofacial Congenital Anomalies, Aichi Gakuin University, Nagoya, Japan.,Cleft Lip and Palate Center, Aichi Gakuin Dental Hospital, Nagoya, Japan.,Division of Speech, Hearing, and Language, Aichi Gakuin Dental Hospital, Nagoya, Japan
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3
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Abstract
Orofacial clefts are one of the most common congenital anomalies worldwide; however, morphopathogenesis of the clefts is not yet completely understood. Taking the importance of innate immunity into account, the aim of this work was to examine the appearance and distribution of macrophages (M) 1, M2, and TNF-α, as well as to deduce any possible intercorrelations between the three factors in cleft affected lip tissue samples. Twenty samples of soft tissue were collected from children during plastic surgery. Fourteen control tissue samples were obtained during labial frenectomy. Tissues were immunohistochemically stained, analysed by light microscopy using a semi-quantitative method, and the Mann–Whitney U and Spearman’s tests were used to evaluate statistical differences and correlations. A statistically significant difference in the distribution was observed only in regard to M1. A weak correlation was observed between M2 and TNF-α but a moderate one between M1 and M2 as well as M1 and TNF-α. However, only the correlation between M1 and M2 was statistically important. The rise in M1, alongside the positive correlation between M1 and TNF-α, suggested a more pro-inflammatory/inflammatory environment in the cleft affected lip tissue. The moderate positive correlation between M1 and M2 indicated an intensification of the protective mechanisms.
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Lin Y, Song T, Ronde EM, Ma G, Cui H, Xu M. The important role of MDM2, RPL5, and TP53 in mycophenolic acid-induced cleft lip and palate. Medicine (Baltimore) 2021; 100:e26101. [PMID: 34032749 PMCID: PMC8154508 DOI: 10.1097/md.0000000000026101] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Accepted: 05/05/2021] [Indexed: 12/11/2022] Open
Abstract
Mycophenolate embryopathy (MPE) is a mycophenolic acid (MPA)-induced congenital malformation with distinctive symptoms. Cleft lip/palate (CLP) is one of the most common symptoms of MPE. The aim of this study was to screen and verify hub genes involved in MPA-induced CLP and to explore the potential molecular mechanisms underlying MPE.Overlapping genes related to MPA and CLP were obtained from the GeneCards database. These genes were further analyzed via bioinformatics. The Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analysis results were visualized with the Cytoscape ClueGO plug-in. Gene protein-protein interaction (PPI) networks were constructed based on data obtained from the Search Tool for the Retrieval of Interacting Genes/Proteins (STRING) database.Overall, 58 genes related to MPA and CLP were identified. The genes most relevant to MPA-induced CLP included ABCB1, COL1A1, Rac1, TGFβ1, EDN1, and TP53, as well as the TP53-associated genes MDM2 and RPL5. GO analysis demonstrated gene enrichment regarding such terms as ear, mesenchymal, striated muscle, and ureteric development. KEGG analysis demonstrated gene enrichment in such pathways as the HIF-1 signaling pathway, glycosylphosphatidylinositol-anchor biosynthesis, the TNF signaling pathway, and hematopoietic stem cell development.Bioinformatic analysis was performed on the genes currently known to be associated with MPA-induced CLP pathogenesis. MPA-induced CLP is mediated by multiple ribosome stress related genes and pathways. MDM2, RPL5 and TP53 could be the main contributor in this pathogenesis, along with several other genes. ABCB1 polymorphism could be related to the probability of MPA-induced CLP.
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Affiliation(s)
- Yangyang Lin
- Plastic Surgery Hospital of Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing
- Department of Plastic, Reconstructive and Hand Surgery, Amsterdam UMC, Amsterdam Medical Centre, Amsterdam, The Netherlands
- People's Hospital of Guangxi Zhuang Autonomous Region, Nanning
| | - Tao Song
- Plastic Surgery Hospital of Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing
| | - Elsa M. Ronde
- Department of Plastic, Reconstructive and Hand Surgery, Amsterdam UMC, Amsterdam Medical Centre, Amsterdam, The Netherlands
| | - Gang Ma
- People's Hospital of Guangxi Zhuang Autonomous Region, Nanning
| | - Huiqin Cui
- The Fourth Affiliated Hospital of Guangxi Medical University, Liuzhou, China
| | - Meng Xu
- Plastic Surgery Hospital of Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing
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Yang J, Yu X, Zhu G, Wang R, Lou S, Zhu W, Fu C, Liu J, Fan L, Li D, Shao Q, Ma L, Wang L, Wang Z, Pan Y. Integrating GWAS and eQTL to predict genes and pathways for non-syndromic cleft lip with or without palate. Oral Dis 2020; 27:1747-1754. [PMID: 33128317 DOI: 10.1111/odi.13699] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 10/14/2020] [Accepted: 10/16/2020] [Indexed: 12/11/2022]
Abstract
OBJECTIVE To explore susceptibility genes and pathways for non-syndromic cleft lip with or without cleft palate (NSCL/P). MATERIALS AND METHODS Two genome-wide association studies (GWAS) datasets, including 858 NSCL/P cases and 1,248 controls, were integrated with expression quantitative trait loci (eQTL) dataset identified by Genotype-Tissue Expression (GTEx) project in whole-blood samples. The expression of the candidate genes in mouse orofacial development was inquired from FaceBase. Protein-protein interaction (PPI) network was visualized to identify protein functions. Go and KEGG pathway analyses were performed to explore the underlying risk pathways. RESULTS A total of 233 eQTL single-nucleotide polymorphisms (SNPs) in 432 candidate genes were identified to be associated with the risk of NSCL/P. One hundred and eighty-three susceptible genes were expressed in mouse orofacial development according to FaceBase. PPI network analysis highlighted that these genes involved in ubiquitin-mediated proteolysis (KCTD7, ASB1, UBOX5, ANAPC4) and DNA synthesis (XRCC3, RFC3, KAT5, RHNO1) were associated with the risk of NSCL/P. GO and KEGG pathway analyses revealed that the fatty acid metabolism pathway (ACADL, HSD17B12, ACSL5, PPT1, MCAT) played an important role in the development of NSCL/P. CONCLUSIONS Our results identified novel susceptibility genes and pathways associated with the development of NSCL/P.
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Affiliation(s)
- Jing Yang
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China.,Department of Orthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China
| | - Xin Yu
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China.,Department of Orthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China
| | - Guirong Zhu
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China.,Department of Orthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China
| | - Ruimin Wang
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China
| | - Shu Lou
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China.,Department of Orthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China
| | - Weihao Zhu
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China.,Department of Orthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China
| | - Chengyi Fu
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China.,Department of Orthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China
| | - Jinsuo Liu
- Yifangming (Beijing) Technology Co., Ltd, Beijing, China
| | - Liwen Fan
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China.,Department of Orthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China
| | - Dandan Li
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China.,Department of Orthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China
| | - Qinghua Shao
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China.,Department of Orthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China
| | - Lan Ma
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China
| | - Lin Wang
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China.,Department of Orthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China.,State Key Laboratory of Reproductive Medicine, Nanjing Medical University, Nanjing, China
| | - Zhendong Wang
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China.,Department of Orthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China
| | - Yongchu Pan
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China.,Department of Orthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China.,State Key Laboratory of Reproductive Medicine, Nanjing Medical University, Nanjing, China
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6
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Saleem K, Zaib T, Sun W, Fu S. Assessment of candidate genes and genetic heterogeneity in human non syndromic orofacial clefts specifically non syndromic cleft lip with or without palate. Heliyon 2019; 5:e03019. [PMID: 31886431 PMCID: PMC6921104 DOI: 10.1016/j.heliyon.2019.e03019] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Revised: 11/25/2019] [Accepted: 12/06/2019] [Indexed: 12/26/2022] Open
Abstract
Non syndromic orofacial clefts specifically non-syndromic cleft lip/palate are one of the most common craniofacial malformation among birth defects in human having multifactorial etiology with an incidence of 1:700/1000. On the basis of association with other congenital malformations or their presence as isolated anomaly, OFC can be classified as syndromic (30%) and nonsyndromic (70%) respectively. The major cause of disease demonstrates complex interplay between genetic and environmental factors. The pathogenic mechanism of underlying factors have been provided by different genetic studies on large-scale with significant recent advances in genotyping technologies usually based on linkage or genome wide association studies (GWAS). On the basis of recent studies, new tools to identify causative genes involved in NSCL/P reported approximately more than 30 genetic risk loci that are responsible for pathogenesis of facial deformation. Despite these findings, it is still uncertain that how much of variance in NSCL/P predisposing factors can be explain by identified risk loci, as they all together accounts for only 20%-25% of NSCL/P heritability. So there is need of further findings about the problem of rare low frequency coding variants and other missing responsive factors or genetic modifiers. This review will described those potential genes and loci reported in different studies whose involvement in pathogenesis of nonsyndromic OFC has wide scientific evidence.
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Affiliation(s)
- Komal Saleem
- Laboratory of Medical Genetics, Harbin Medical University, Harbin 150081, China.,Key Laboratory of Preservation of Human Genetics Resources and Disease Control in China (Harbin Medical University), Ministry of Education, China
| | - Tahir Zaib
- Laboratory of Medical Genetics, Harbin Medical University, Harbin 150081, China.,Key Laboratory of Preservation of Human Genetics Resources and Disease Control in China (Harbin Medical University), Ministry of Education, China
| | - Wenjing Sun
- Laboratory of Medical Genetics, Harbin Medical University, Harbin 150081, China.,Key Laboratory of Preservation of Human Genetics Resources and Disease Control in China (Harbin Medical University), Ministry of Education, China
| | - Songbin Fu
- Laboratory of Medical Genetics, Harbin Medical University, Harbin 150081, China.,Key Laboratory of Preservation of Human Genetics Resources and Disease Control in China (Harbin Medical University), Ministry of Education, China
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Yin B, Shi B, Jia ZL. [Associations among PRDM16 polymorphisms, environmental exposure factors during mother's pregnancy, and nonsyndromic cleft lip with or without cleft palate]. HUA XI KOU QIANG YI XUE ZA ZHI = HUAXI KOUQIANG YIXUE ZAZHI = WEST CHINA JOURNAL OF STOMATOLOGY 2018; 36:503-507. [PMID: 30465343 PMCID: PMC7041131 DOI: 10.7518/hxkq.2018.05.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 01/03/2018] [Revised: 07/06/2018] [Indexed: 02/05/2023]
Abstract
OBJECTIVE We aimed to study the association between rs7525173, rs2236518, rs2493264 single nucleotide polymorphism (SNP) in the PRDM16 gene, smoking, alcohol exposures, and nonsyndromic cleft lip with or without cleft palate (NSCL/P). METHODS A total of 157 case-parent trios were selected, and SNPs were genotyped by using ligase detection reaction (LDR) and direct sequencing methods. Transmission disequilibrium test (TDT) and linkage disequilibrium (LD) tests were con-ducted to analyze the data. A total of 1 710 patients with orofacial clefts and 956 healthy newborns were enrolled in the epidemiological survey. The smoking and drinking exposures of parents during early pregnancy were analyzed. RESULTS The C allele at rs2236518 was over-transmitted for NSCPO (P<0.05). Statistical differences were observed among three factors, namely, maternal smoking, maternal passive smoking, and maternal drinking (P<0.05). CONCLUSIONS The rs2236518 at PRDM16 gene, maternal smoking, maternal passive smoking, and maternal drinking were closely related to the occurrence of NSCL/P.
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Affiliation(s)
- Bin Yin
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Dept. of Cleft Lip and Palate Surgery, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Bing Shi
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Dept. of Cleft Lip and Palate Surgery, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Zhong-Lin Jia
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Dept. of Cleft Lip and Palate Surgery, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
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8
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Suazo J, Santos JL, Carreño H, Jara L, Blanco R. Linkage Disequilibrium between MSX1 and Non-syndromic Cleft Lip/Palate in the Chilean Population. J Dent Res 2016; 83:782-5. [PMID: 15381719 DOI: 10.1177/154405910408301009] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Non-syndromic cleft lip/palate (NSCLP) is a complex genetic trait. Linkage and association studies have suggested that a clefting locus could be located on chromosome 4p. Sixty Chilean families were recruited for this study; from these, we used unrelated trios to evaluate the possible linkage disequilibrium between MSX1 and NSCLP. An intragenic marker, MSX1-CA, and an extragenic marker, D4S432 at a distance of 0.8 cM from MSX1, were analyzed by means of polymerase chain-reaction with fluorescent-labeled forward primers, followed by electrophoresis on a laser-fluorescent sequencer. We carried out a transmission/disequilibrium test (TDT) for multiple alleles to evaluate the presence of linkage disequilibrium. Results showed a preferential transmission of the 169-bp allele of MSX1 (p = 0.03). Although there was no preferential transmission for the D4S432 marker, the overall extended TDT (ETDT) showed a significant result (p = 0.01). The authors’ findings support the hypothesis of the contribution of MSX1 in the etiology of NSCLP in the Chilean population.
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Affiliation(s)
- J Suazo
- Laboratory of Genetic Epidemiology, Institute of Nutrition and Food Technology, University of Chile, Santiago, Chile
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Babu Gurramkonda V, Syed AH, Murthy J, V K S Lakkakula B. Association of TFAP2A gene polymorphism with susceptibility to non-syndromic cleft lip with or without palate risk in south Indian population. Meta Gene 2016; 9:181-4. [PMID: 27617216 PMCID: PMC5006125 DOI: 10.1016/j.mgene.2016.07.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Revised: 07/08/2016] [Accepted: 07/08/2016] [Indexed: 11/25/2022] Open
Abstract
The aetiology of non-syndromic cleft lip with or without cleft palate (NSCL/P) is complex involving multiple interacting genes and environmental factors. The primary objective of the present study was to investigate the role of TFAP2A gene single nucleotide polymorphisms (SNPs) in the pathogenesis of NSCL/P. In this study, 173 unrelated NSCL/P patients and 176 controls without clefts were genotyped with TFAP2A rs1675414 (Exon 1), rs3798691 (Intron 1), and rs303050 (Intron 4) variants by allele-specific amplification using the KASPar SNP genotyping system. The method of multifactor dimensionality reduction (MDR) was used to analyze gene-gene interactions. TFAP2A polymorphisms are not found to be associated with non-syndromic cleft lip with or without cleft palate (NSCL/P) at either the genotype or allele levels. No linkage disequilibrium (LD) was found between TFAP2A variants. MDR analysis did not show a significant effect of the TFAP2A gene polymorphisms on susceptibility to NSCL/P (p > 0.05). These results suggest that the analyzed variations in TFAP2A gene might not be associated with NSCL/P pathogenesis in south Indian population.
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Affiliation(s)
| | - Altaf Hussain Syed
- Department of Plastic Surgery, Sri Ramachandra University, Chennai, India
| | - Jyotsna Murthy
- Department of Plastic Surgery, Sri Ramachandra University, Chennai, India
| | - Bhaskar V K S Lakkakula
- Department of Biomedical Sciences, Sri Ramachandra University, Chennai, India; Sickle Cell Institute Chhattisgarh, Raipur, India
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Huang H, Yang X, Bao M, Cao H, Miao X, Zhang X, Gan L, Qiu M, Zhang Z. Ablation of the Sox11 Gene Results in Clefting of the Secondary Palate Resembling the Pierre Robin Sequence. J Biol Chem 2016; 291:7107-18. [PMID: 26826126 DOI: 10.1074/jbc.m115.690875] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Indexed: 02/03/2023] Open
Abstract
Mouse gene inactivation has shown that the transcription factor Sox11 is required for mouse palatogenesis. However, whether Sox11 is primarily involved in the regulation of palatogenesis still remains elusive. In this study, we explored the role ofSox11in palatogenesis by analyzing the developmental mechanism in cleft palate formation in mutants deficient in Sox11. Sox11 is expressed both in the developing palatal shelf and in the surrounding structures, including the mandible. We found that cleft palate occurs only in the mutant in which Sox11is directly deleted. As in the wild type, the palatal shelves in the Sox11 mutant undergo outgrowth in a downward direction and exhibit potential for fusion and elevation. However, mutant palatal shelves encounter clefting, which is associated with a malpositioned tongue that results in physical obstruction of palatal shelf elevation at embryonic day 14.5 (E14.5). We found that loss of Sox11led to reduced cell proliferation in the developing mandibular mesenchyme via Cyclin D1, leading to mandibular hypoplasia, which blocks tongue descent. Extensive analyses of gene expression inSox11 deficiency identified FGF9 as a potential candidate target of Sox11 in the modulation of cell proliferation both in the mandible and the palatal shelf between E12.5 and E13.5. Finally we show, using in vitro assays, that Sox11 directly regulates the expression of Fgf9 and that application of FGF9 protein to Sox11-deficient palatal shelves restores the rate of BrdU incorporation. Taken together, the palate defects presented in the Sox11 loss mutant mimic the clefting in the Pierre Robin sequence in humans.
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Affiliation(s)
- Huarong Huang
- From the Institute of Developmental and Regenerative Biology, Zhejiang Key Laboratory for Mammalian Organogenesis and Regeneration, College of Biological and Environmental Science, Hangzhou Normal University, Zhejiang 310036, China
| | - Xiaojuan Yang
- From the Institute of Developmental and Regenerative Biology, Zhejiang Key Laboratory for Mammalian Organogenesis and Regeneration, College of Biological and Environmental Science, Hangzhou Normal University, Zhejiang 310036, China
| | - Meiling Bao
- From the Institute of Developmental and Regenerative Biology, Zhejiang Key Laboratory for Mammalian Organogenesis and Regeneration, College of Biological and Environmental Science, Hangzhou Normal University, Zhejiang 310036, China
| | - Huanhuan Cao
- From the Institute of Developmental and Regenerative Biology, Zhejiang Key Laboratory for Mammalian Organogenesis and Regeneration, College of Biological and Environmental Science, Hangzhou Normal University, Zhejiang 310036, China
| | - Xiaoping Miao
- From the Institute of Developmental and Regenerative Biology, Zhejiang Key Laboratory for Mammalian Organogenesis and Regeneration, College of Biological and Environmental Science, Hangzhou Normal University, Zhejiang 310036, China
| | - Xiaoyun Zhang
- From the Institute of Developmental and Regenerative Biology, Zhejiang Key Laboratory for Mammalian Organogenesis and Regeneration, College of Biological and Environmental Science, Hangzhou Normal University, Zhejiang 310036, China
| | - Lin Gan
- From the Institute of Developmental and Regenerative Biology, Zhejiang Key Laboratory for Mammalian Organogenesis and Regeneration, College of Biological and Environmental Science, Hangzhou Normal University, Zhejiang 310036, China
| | - Mengsheng Qiu
- From the Institute of Developmental and Regenerative Biology, Zhejiang Key Laboratory for Mammalian Organogenesis and Regeneration, College of Biological and Environmental Science, Hangzhou Normal University, Zhejiang 310036, China
| | - Zunyi Zhang
- From the Institute of Developmental and Regenerative Biology, Zhejiang Key Laboratory for Mammalian Organogenesis and Regeneration, College of Biological and Environmental Science, Hangzhou Normal University, Zhejiang 310036, China
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11
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Evidence of the involvement of the polymorphisms near MSX1 gene in non-syndromic cleft lip with or without cleft palate. Int J Pediatr Otorhinolaryngol 2015; 79:1081-4. [PMID: 25953455 DOI: 10.1016/j.ijporl.2015.04.034] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/12/2015] [Revised: 04/18/2015] [Accepted: 04/21/2015] [Indexed: 11/20/2022]
Abstract
OBJECTIVE Non-syndromic cleft lip, with or without cleft palate (NSCL/P) is a common craniofacial birth defect, characterised by an incomplete separation between nasal and oral cavities without any other congenital anomaly in humans. Several genes which play a role in cell differentiation, migration, growth and apoptosis, have been associated with clefting. The purpose of this study was to investigate the association between single-nucleotide polymorphisms (SNPs) near MSX1 gene and NSCL/P among South Indian population. METHODS A case-control analysis of five single nucleotide polymorphisms near MSX1 gene (rs11726039, rs868257, rs6446693, rs1907998 and rs6832405) was carried out in 173 patients with NSCL/P and 176 unaffected controls to determine their association with NSCL/P. RESULTS All SNPs were polymorphic in the study population. Comparisons of allele and genotype frequencies revealed that the C variant allele and the TC/CC genotypes of rs11726039 was significantly higher in controls than in the NSCL/P group (OR: 0.63; 95% CI: 0.41-0.097; p=0.037). However, neither of these findings remained significant after Bonferroni correction for multiple comparisons. The frequencies of rs868257, rs6446693, rs1907998 and rs6832405 minor alleles and genotypes were similar between the control and NSCL/P groups. No significant linkage disequilibrium (LD) was observed. Genotype-genotype interaction and the haplotype analysis did not reveal any significant association with NSCL/P. CONCLUSIONS The study results were suggestive of a positive association between MSX1 rs11726039 and NSCL/P in the South Indian population.
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12
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MacIntosh RB, Herman LT, Shivapuja PK, Echeverri-Arguello RC. Volunteer Cleft Surgery in Colombia: An 18-Year Perspective. J Oral Maxillofac Surg 2013; 71:1742-51. [DOI: 10.1016/j.joms.2013.06.189] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2013] [Revised: 05/30/2013] [Accepted: 06/03/2013] [Indexed: 12/01/2022]
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13
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Ross AP, Mansilla MA, Choe Y, Helminski S, Sturm R, Maute RL, May SR, Hozyasz KK, Wójcicki P, Mostowska A, Davidson B, Adamopoulos IE, Pleasure SJ, Murray JC, Zarbalis KS. A mutation in mouse Pak1ip1 causes orofacial clefting while human PAK1IP1 maps to 6p24 translocation breaking points associated with orofacial clefting. PLoS One 2013; 8:e69333. [PMID: 23935987 PMCID: PMC3723895 DOI: 10.1371/journal.pone.0069333] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2013] [Accepted: 06/08/2013] [Indexed: 01/05/2023] Open
Abstract
Orofacial clefts are among the most common birth defects and result in an improper formation of the mouth or the roof of the mouth. Monosomy of the distal aspect of human chromosome 6p has been recognized as causative in congenital malformations affecting the brain and cranial skeleton including orofacial clefts. Among the genes located in this region is PAK1IP1, which encodes a nucleolar factor involved in ribosomal stress response. Here, we report the identification of a novel mouse line that carries a point mutation in the Pak1ip1 gene. Homozygous mutants show severe developmental defects of the brain and craniofacial skeleton, including a median orofacial cleft. We recovered this line of mice in a forward genetic screen and named the allele manta-ray (mray). Our findings prompted us to examine human cases of orofacial clefting for mutations in the PAK1IP1 gene or association with the locus. No deleterious variants in the PAK1IP1 gene coding region were recognized, however, we identified a borderline association effect for SNP rs494723 suggesting a possible role for the PAK1IP1 gene in human orofacial clefting.
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Affiliation(s)
- Adam P. Ross
- Department of Pathology and Laboratory Medicine, University of California Davis, Sacramento, California, United States of America
| | - M. Adela Mansilla
- Department of Pediatrics, University of Iowa, Iowa City, Iowa, United States of America
| | - Youngshik Choe
- Department of Neurology, University of California San Francisco, San Francisco, California, United States of America
| | - Simon Helminski
- Department of Pathology and Laboratory Medicine, University of California Davis, Sacramento, California, United States of America
| | - Richard Sturm
- Interdisciplinary Center for Neurosciences, Heidelberg University, Heidelberg, Germany
| | - Roy L. Maute
- Institute for Cancer Genetics, Columbia University, New York City, New York, United States of America
| | - Scott R. May
- Molecular Neurobiology Laboratory, The Salk Institute for Biological Studies, La Jolla, California, United States of America
| | - Kamil K. Hozyasz
- Department of Pediatrics, Institute of Mother and Child, Warsaw, Poland
| | - Piotr Wójcicki
- Department of Plastic Surgery, Wrocław Medical University, Polanica Zdroj, Poland
- Department of Plastic Surgery, Medical Centre, Polanica-Zdrój, Poland
| | - Adrianna Mostowska
- Department of Biochemistry and Molecular Biology, Poznan University of Medical Sciences, Poznan, Poland
| | - Beth Davidson
- Department of Pediatrics, University of Iowa, Iowa City, Iowa, United States of America
| | - Iannis E. Adamopoulos
- Department of Internal Medicine, University of California Davis, Sacramento, California, United States of America
- Institute for Pediatric Regenerative Medicine, Shriners Hospitals for Children Northern California, Sacramento, California, United States of America
| | - Samuel J. Pleasure
- Department of Neurology, University of California San Francisco, San Francisco, California, United States of America
| | - Jeffrey C. Murray
- Department of Pediatrics, University of Iowa, Iowa City, Iowa, United States of America
| | - Konstantinos S. Zarbalis
- Department of Pathology and Laboratory Medicine, University of California Davis, Sacramento, California, United States of America
- Institute for Pediatric Regenerative Medicine, Shriners Hospitals for Children Northern California, Sacramento, California, United States of America
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14
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Kim NY, Kim YH, Park JW, Baek SH. Association between MSX1 SNPs and nonsyndromic cleft lip with or without cleft palate in the Korean population. J Korean Med Sci 2013; 28:522-6. [PMID: 23580168 PMCID: PMC3617303 DOI: 10.3346/jkms.2013.28.4.522] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2012] [Accepted: 02/06/2013] [Indexed: 11/20/2022] Open
Abstract
The purpose of this study was to investigate the contribution of MSX1 gene to the risk of nonsyndromic cleft lip with or without cleft palate (NS-CL ± P) in the Korean population. The samples consisted of 142 NS-CL ± P families (9 with cleft lip, 26 with cleft lip and alveolus, and 107 with cleft lip and palate; 76 trios and 66 dyads). Three single nucleotide polymorphisms (SNPs: rs3821949, rs12532, and rs4464513) were tested for association with NS-CL ± P case-parent trios using transmission disequilibrium test (TDT) and conditional logistic regression models (CLRMs). Minor allele frequency, heterozygosity, χ(2) test for Hardy-Weinberg equilibrium, and pairwise linkage disequilibrium (LD) at each SNP were computed. The family- and haplotype-based association test programs were used to perform allelic and genotypic TDTs for individual SNPs and to fabricate sliding windows of haplotypes. Genotypic odds ratios (GORs) were obtained from CLRMs using R software. Although the family-based TDT indicated a meaningful association for rs3821949 (P = 0.028), the haplotype analysis did not reveal any significant association with rs3821949, rs12532, or rs4464513. The A allele at rs3821949 had a significant increased risk of NS-CL ± P (GOR, 1.64; 95% confidence interval,1.03-2.63; P = 0.038, additive model). A positive association is suggested between MSX1 rs3821949 and NS-CL ± P in the Korean population.
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Affiliation(s)
- Na Young Kim
- Department of Orthodontics, School of Dentistry, Seoul National University, Seoul, Korea
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15
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Cardoso ML, Bezerra JF, Oliveira GHM, Soares CD, Oliveira SR, de Souza KSC, da Silva HPV, Silbiger VN, Luchessi AD, Fajardo CM, Hirata RDC, Almeida MG, Hirata MH, Rezende AA. MSX1 gene polymorphisms in non-syndromic cleft lip and/or palate. Oral Dis 2012; 19:507-12. [PMID: 23130753 DOI: 10.1111/odi.12033] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2011] [Revised: 09/13/2012] [Accepted: 09/28/2012] [Indexed: 02/07/2023]
Abstract
OBJECTIVE The aim of this study was to investigate the contribution of 6 polymorphic variants of the MSX1 gene in non-syndromic cleft lip and/or palate (NSCL/P). METHODS Three hundred and fifty-eight individuals (158 NSCL/P cases and 200 controls) were genotyped by TaqMan allelic discrimination using predesigned SNP assays. Statistical analyses were conducted using the software spss 15.0 and the r statistical suite. Haplotype block structure and haplotype frequencies were determined using the Haploview. A P-value of 0.05 and confidence interval of 95% were used for all of statistical tests. RESULTS The patients with non-syndromic cleft lip and/or palate were characterized by similar distribution of MSX1 genotypes and allele in comparison to subjects without oral clefts (P > 0.05). Two haplotype blocks were constructed with polymorphisms of MSX1 gene and haplotypes formed showed a similar frequency in patients with and without oral clefts. CONCLUSIONS The present study provides no evidence that MSX1 polymorphisms (rs3775261, rs1042484, rs12532, rs6446693, rs4464513 and rs1907998) play a major role in NSCL/P.
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Affiliation(s)
- M L Cardoso
- Department of Clinical and Toxicological Analysis, School of Pharmaceutical Sciences, Federal University of Rio Grande do Norte, Natal, RN, Brazil
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16
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Abstract
Cleft lip and palate (CLP) are birth defects that affect the upper lip and the roof of the mouth. CLP has a multifactorial etiology, comprising both genetic and environmental factors. In this review we discuss the recent data on the etiology of cleft lip and palate. We conducted a search of the MEDLINE database (Entrez PubMed) from January 1986 to December 2010 using the key words: ‘cleft lip,’ ‘cleft palate,’ ‘etiology,’ and ‘genetics.’ The etiology of CLP seems complex, with genetics playing a major role. Several genes causing syndromic CLP have been discovered. Three of them—T-box transcription factor-22 (TBX22), poliovirus receptor-like-1 (PVRL1), and interferon regulatory factor-6 (IRF6)—are responsible for causing X-linked cleft palate, cleft lip/palate–ectodermal dysplasia syndrome, and Van der Woude and popliteal pterygium syndromes, respectively; they are also implicated in nonsyndromic CLP. The nature and functions of these genes vary widely, illustrating the high vulnerability within the craniofacial developmental pathways. The etiological complexity of nonsyndromic cleft lip and palate is also exemplified by the large number of candidate genes and loci. To conclude, although the etiology of nonsyndromic CLP is still largely unknown, mutations in candidate genes have been identified in a small proportion of cases. Determining the relative risk of CLP on the basis of genetic background and environmental influence (including smoking, alcohol use, and dietary factors) will be useful for genetic counseling and the development of future preventive measures.
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Affiliation(s)
- Sarvraj Singh Kohli
- Department of Orthodontics and Dentofacial Orthopedics, Hitkarini Dental College and Hospital, Jabalpur, Madhya Pradesh, India
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17
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de la Garza G, Schleiffarth JR, Dunnwald M, Mankad A, Weirather JL, Bonde G, Butcher S, Mansour TA, Kousa YA, Fukazawa CF, Houston DW, Manak JR, Schutte BC, Wagner DS, Cornell RA. Interferon regulatory factor 6 promotes differentiation of the periderm by activating expression of Grainyhead-like 3. J Invest Dermatol 2012; 133:68-77. [PMID: 22931925 PMCID: PMC3541433 DOI: 10.1038/jid.2012.269] [Citation(s) in RCA: 96] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Abstract
Interferon Regulatory Factor 6 (IRF6) is a transcription factor that, in mammals, is required for the differentiation of skin, breast epithelium, and oral epithelium. However, the transcriptional targets that mediate these effects are currently unknown. In zebrafish and frog embryos Irf6 is necessary for differentiation of the embryonic superficial epithelium, or periderm. Here we use microarrays to identify genes that are expressed in the zebrafish periderm and whose expression is inhibited by a dominant-negative variant of Irf6 (dnIrf6). These methods identify Grhl3, an ancient regulator of the epidermal permeability barrier, as acting downstream of Irf6. In human keratinocytes, IRF6 binds conserved elements near the GHRL3 promoter. We show that one of these elements has enhancer activity in human keratinocytes and zebrafish periderm, suggesting that Irf6 directly stimulates Grhl3 expression in these tissues. Simultaneous inhibition of grhl1 and grhl3 disrupts periderm differentiation in zebrafish, and, intriguingly, forced grhl3 expression restores periderm markers in both zebrafish injected with dnIrf6 and frog embryos depleted of Irf6. Finally, in Irf6 deficient mouse embryos, Grhl3 expression in the periderm and oral epithelium is virtually absent. These results indicate that Grhl3 is a key effector of Irf6 in periderm differentiation.
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Affiliation(s)
- Gabriel de la Garza
- Department of Otolaryngology-Head and Neck Surgery, University of Iowa, Iowa City, IA, USA
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18
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GWAS reveals new recessive loci associated with non-syndromic facial clefting. Eur J Med Genet 2012; 55:510-4. [PMID: 22750566 DOI: 10.1016/j.ejmg.2012.06.005] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2011] [Accepted: 06/09/2012] [Indexed: 01/31/2023]
Abstract
We have applied a GWAS to 40 consanguineous families segregating cases of non-syndromic cleft lip with or without cleft palate (NS CL/P) (a total of 160 affected and unaffected individuals) in order to trace potential recessive loci that confer susceptibility to this common facial malformation. Pedigree-based association test (PBAT) analyses reported nominal evidence of association and linkage over SNP markers located at 11q25 (rs4937877, P = 2.7 × 10(-6)), 19p12 (rs4324267, P = 1.6 × 10(-5)), 5q14.1 (rs4588572, P-value = 3.36 × 10(-5)), and 15q21.1 (rs4774497, P = 1.08 × 10(-4)). Using the Versatile Gene-Based Association Study to complement the PBAT results, we found clusters of markers located at chromosomes 19p12, 11q25, and 8p23.2 overcome the threshold for GWAS significance (P < 1 × 10(-7)). From this study, new recessive loci implicated in NS CL/P include: B3GAT1, GLB1L2, ZNF431, ZNF714, and CSMD1, even though the functional association with the genesis of NS CL/P remains to be elucidated. These results emphasize the importance of using homogeneous populations, phenotypes, and family structures for GWAS combined with gene-based association analyses, and should encourage. other researchers to evaluate these genes on independent patient samples affected by NS CL/P.
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19
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Huang YQ, Ma J, Ma M, Deng Y, Li YD, Ren HW, Zhao GZ, Guo SS, Wang YY, Zhang GX, Shi B. Association Between MSX1 Variants and Oral Clefts in Han Chinese in Western China. DNA Cell Biol 2011; 30:1057-61. [PMID: 21689018 DOI: 10.1089/dna.2010.1208] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Yong-qing Huang
- Department of Stomatology, Ningxia Medical University Affiliated Hospital, Ningxia Province, Yinchuan, P.R. China.
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20
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Salahshourifar I, Halim AS, Wan Sulaiman WA, Zilfalil BA. Contribution of MSX1 variants to the risk of non-syndromic cleft lip and palate in a Malay population. J Hum Genet 2011; 56:755-8. [PMID: 21866112 DOI: 10.1038/jhg.2011.95] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Oral clefts are clinically and genetically heterogeneous disorders that are influenced by both genetic and environmental factors. The present family-based association study investigated the role of the MSX1 and TGFB3 genes in the etiology of non-syndromic oral cleft in a Malay population. No transmission distortion was found in the transmission disequilibrium analysis for either MSX1-CA or TGFB3-CA intragenic markers, whereas TGFB3-CA exhibited a trend to excess maternal transmission. In sequencing the MSX1 coding regions in 124 patients with oral cleft, five variants were found, including three known variants (A34G, G110G and P147Q) and two novel variants (M37L and G267A). The P147Q and M37L variants were not observed in 200 control chromosomes, whereas G267A was found in one control sample, indicating a very rare polymorphic variant. Furthermore, the G110G variant displayed a significant association between patients with non-syndromic cleft lip, with or without cleft palate, and normal controls (P=0.001, odds ratio=2.241, 95% confidence interval, 1.357-3.700). Therefore, these genetic variants may contribute, along with other genetic and environmental factors, to this condition.
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Affiliation(s)
- Iman Salahshourifar
- Human Genome Center, School of Medical Sciences, Universiti Sains Malaysia, Kubang Kerian, Kelantan, Malaysia
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21
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Bhaskar L, Murthy J, Venkatesh Babu G. Polymorphisms in genes involved in folate metabolism and orofacial clefts. Arch Oral Biol 2011; 56:723-37. [DOI: 10.1016/j.archoralbio.2011.01.007] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2010] [Revised: 01/18/2011] [Accepted: 01/18/2011] [Indexed: 11/24/2022]
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22
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Shi J, Song T, Jiao X, Qin C, Zhou J. Single-nucleotide polymorphisms (SNPs) of the IRF6 and TFAP2A in non-syndromic cleft lip with or without cleft palate (NSCLP) in a northern Chinese population. Biochem Biophys Res Commun 2011; 410:732-6. [DOI: 10.1016/j.bbrc.2011.06.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2011] [Accepted: 06/01/2011] [Indexed: 01/16/2023]
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Girardi A, Martinelli M, Carinci F, Morselli PG, Caramelli E, Scapoli L. No evidence for a role of CRISPLD2 in non-syndromic cleft lip with or without cleft palate in an Italian population. Eur J Oral Sci 2011; 119:102-5. [PMID: 21244519 DOI: 10.1111/j.1600-0722.2010.00801.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Non-syndromic cleft lip with or without cleft palate (NSCLP) is a malformation with variable phenotypes, resulting from a mixture of genetic and environmental factors. Some studies have supported a role for the 16q24 region and its candidate gene, CRISPLD2, in clefting. A replication study is necessary to confirm these findings. The aim of the present study was to test, by genetic linkage and association analyses, whether the candidate gene, CRISPLD2, represents a risk factor for NSCLP. The analysis of 39 multigenerational families provided formal exclusion of a linkage between NSCLP and the CRISPLD2 locus under different genetic models and non-parametric analyses. The family-based study of 239 unrelated probands and their parents revealed no association between any particular allele or haplotype and NSCLP. Therefore, the present investigation did not support the hypothesis of the involvement of CRISPLD2 in NSCLP malformation, at least with regard to the Italian population.
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Affiliation(s)
- Ambra Girardi
- Department of Histology, Embryology and Applied Biology, Centre of Molecular Genetics, CARISBO Foundation, University of Bologna, Bologna, Italy
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Martinelli M, Carinci F, Morselli P, Palmieri A, Girardi A, Clauser L, Spinelli G, Scapoli L. Study of the 12q13 Region in Nonsyndromic Cleft Lip with or without Cleft Palate. Int J Immunopathol Pharmacol 2011; 24:21-4. [DOI: 10.1177/03946320110240s205] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The 12q13 region has been suggested as a candidate locus for orofacial cleft by different investigators. In the present study we tested the region for linkage with non syndromic cleft lip with or without cleft palate in a collection of 39 Italian multigenerational families, using microsatellite markers. No evidence of linkage was detected between the marker map and NSCLP under different mode of inheritance nor with a nonparametric method. Formal level of linkage exclusion, were obtained for each point of the map. Genetic heterogeneity and the different impact of the candidate locus among populations could explain conflicting results obtained in different studies.
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Affiliation(s)
- M. Martinelli
- Department of Histology, Embryology and Applied Biology, Centre of Molecular Genetics, CARISBO Foundation, University of Bologna, Bologna, Italy
| | - F. Carinci
- Department of D.M.C.C.C., Section of Maxillofacial and Plastic Surgery, University of Ferrara, Ferrara, Italy
| | - P.G. Morselli
- University of Bologna - School of Plastic Surgery - Plastic Surgery Unit S. Orsola Hospital, Bologna, Italy
| | - A. Palmieri
- Department of D.M.C.C.C., Section of Maxillofacial and Plastic Surgery, University of Ferrara, Ferrara, Italy
| | - A. Girardi
- Department of Histology, Embryology and Applied Biology, Centre of Molecular Genetics, CARISBO Foundation, University of Bologna, Bologna, Italy
| | - L. Clauser
- Maxillo-Facial Surgery, Arcispedale Sant‘ Anna, Ferrara, Italy
| | - G. Spinelli
- Section of Maxillo-Facial Surgery, Careggi Hospital, Firenze, Italy
| | - L. Scapoli
- Department of Histology, Embryology and Applied Biology, Centre of Molecular Genetics, CARISBO Foundation, University of Bologna, Bologna, Italy
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Scapoli L, Martinelli M, Pezzetti F, Palmieri A, Girardi A, Savoia A, Bianco AM, Carinci F. Expression and association data strongly support JARID2 involvement in nonsyndromic cleft lip with or without cleft palate. Hum Mutat 2010; 31:794-800. [PMID: 20506229 DOI: 10.1002/humu.21266] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Nonsyndromic cleft lip with or without cleft palate (CL/P) affects approximately 1 in 1,000 births. Genetic studies have provided evidence for the role of several genes and candidate loci in clefting; however, conflicting results have frequently been obtained and much have to be done to unravel the complex genetics of CL/P. In the present investigation we have focused on the candidate region in 6p23, a region that have been found linked to CL/P in several investigations, in the attempt to find out the susceptibility gene provisionally named OFC1. Gene expression experiments in mice embryo of positional candidate genes revealed that JARID2 was highly and specifically expressed in epithelial cells in merging palatal shelves. A family-based linkage disequilibrium study confirmed the pivotal role of JARID2 in orofacial development and strongly supports a role for this gene in CL/P etiology (multiallelic haplotype test P=6 x 10(-5)). Understanding the molecular role of JARID2 within facial development may offer additional information to further unravel the complex genetics of CL/P.
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Affiliation(s)
- Luca Scapoli
- Department of Histology, Embryology and Applied Biology, Centre of Molecular Genetics, University of Bologna, Via Belmeloro, 8, 40126 Bologna, Italy.
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26
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Jagomägi T, Nikopensius T, Krjutskov K, Tammekivi V, Viltrop T, Saag M, Metspalu A. MTHFR and MSX1 contribute to the risk of nonsyndromic cleft lip/palate. Eur J Oral Sci 2010; 118:213-20. [PMID: 20572854 DOI: 10.1111/j.1600-0722.2010.00729.x] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Recent studies suggest that multiple interacting loci, with possible additional environmental factors, influence the risk for nonsyndromic oral clefts, one of the most common birth defects in humans. Advances in high-throughput genotyping technology allow the testing of multiple markers, simultaneously, in many candidate genes. We tested for associations between 176 haplotype-tagging single nucleotide polymorphisms (SNPs) in 18 candidate genes/loci and nonsyndromic clefts in a case-control study in an Estonian sample (153 patients, 205 controls). The most significant associations with nonsyndromic cleft lip with or without cleft palate (CL/P) were found for SNPs in MSX1, MTHFR, and PVRL2, including several common haplotypes in the MTHFR and MSX1 genes. The strongest association was observed for rs6446693 in the MSX1 region, which remained statistically significant after Bonferroni correction. The strongest association with nonsyndromic cleft palate (CP) was found for the SNP rs11624283 in the JAG2 gene. Epistatic interactions were observed for SNPs within PVRL2, between BCL3 and EDN1, and between IRF6 and MSX1 genes. This study provides further evidence implicating MSX1 and MTHFR in the etiology of nonsyndromic CL/P across different populations.
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Affiliation(s)
- Triin Jagomägi
- Department of Stomatology, Faculty of Medicine, University of Tartu, Tartu, Estonia.
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27
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Liu F, Millar S. Wnt/beta-catenin signaling in oral tissue development and disease. J Dent Res 2010; 89:318-30. [PMID: 20200414 PMCID: PMC3140915 DOI: 10.1177/0022034510363373] [Citation(s) in RCA: 168] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2008] [Revised: 01/08/2010] [Accepted: 01/12/2010] [Indexed: 11/16/2022] Open
Abstract
The Wnt/beta-catenin signaling pathway is one of several key conserved intercellular signaling pathways in animals, and plays fundamental roles in the proliferation, regeneration, differentiation, and function of many cell and tissue types. This pathway is activated in a dynamic manner during the morphogenesis of oral organs, including teeth, taste papillae, and taste buds, and is essential for these processes to occur normally. Conversely, forced activation of Wnt/beta-catenin signaling promotes the formation of ectopic teeth and taste papillae. In this review, we discuss our current understanding of the roles of Wnt/beta-catenin signaling in oral tissue development and in related human diseases, and the potential of manipulating this pathway for therapeutic purposes.
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Affiliation(s)
- F. Liu
- Institute for Regenerative Medicine at Scott & White Hospital, Texas A&M Health Science Center, Temple, TX 76502, USA
| | - S.E. Millar
- Departments of Dermatology and Cell and Developmental Biology, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA
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Moreno LM, Mansilla MA, Bullard SA, Cooper ME, Busch TD, Machida J, Johnson MK, Brauer D, Krahn K, Daack-Hirsch S, L'heureux J, Valencia-Ramirez C, Rivera D, López AM, Moreno MA, Hing A, Lammer EJ, Jones M, Christensen K, Lie RT, Jugessur A, Wilcox AJ, Chines P, Pugh E, Doheny K, Arcos-Burgos M, Marazita ML, Murray JC, Lidral AC. FOXE1 association with both isolated cleft lip with or without cleft palate, and isolated cleft palate. Hum Mol Genet 2009; 18:4879-96. [PMID: 19779022 DOI: 10.1093/hmg/ddp444] [Citation(s) in RCA: 117] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Nonsyndromic orofacial clefts are a common complex birth defect caused by genetic and environmental factors and/or their interactions. A previous genome-wide linkage scan discovered a novel locus for cleft lip with or without cleft palate (CL/P) at 9q22-q33. To identify the etiologic gene, we undertook an iterative and complementary fine mapping strategy using family-based CL/P samples from Colombia, USA and the Philippines. Candidate genes within 9q22-q33 were sequenced, revealing 32 new variants. Concurrently, 397 SNPs spanning the 9q22-q33 2-LOD-unit interval were tested for association. Significant SNP and haplotype association signals (P = 1.45E - 08) narrowed the interval to a 200 kb region containing: FOXE1, C9ORF156 and HEMGN. Association results were replicated in CL/P families of European descent and when all populations were combined the two most associated SNPs, rs3758249 (P = 5.01E - 13) and rs4460498 (P = 6.51E - 12), were located inside a 70 kb high linkage disequilibrium block containing FOXE1. Association signals for Caucasians and Asians clustered 5' and 3' of FOXE1, respectively. Isolated cleft palate (CP) was also associated, indicating that FOXE1 plays a role in two phenotypes thought to be genetically distinct. Foxe1 expression was found in the epithelium undergoing fusion between the medial nasal and maxillary processes. Mutation screens of FOXE1 identified two family-specific missense mutations at highly conserved amino acids. These data indicate that FOXE1 is a major gene for CL/P and provides new insights for improved counseling and genetic interaction studies.
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Affiliation(s)
- Lina M Moreno
- Department of Orthodontics, College of Dentistry, University of Iowa, Iowa City, IA 52242, USA
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29
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Jia ZL, Li Y, Li L, Wu J, Zhu LY, Yang C, Chen CH, Shi B. Association Among IRF6 Polymorphism, Environmental Factors, and Nonsyndromic Orofacial Clefts in Western China. DNA Cell Biol 2009; 28:249-57. [PMID: 19388848 DOI: 10.1089/dna.2008.0837] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Zhong-Lin Jia
- State Key Laboratory of Oral Disease and the Department of Cleft Lip and Palate Surgery, West China College of Stomatology, Sichuan University, Chengdu, People's Republic of China
| | - Yang Li
- State Key Laboratory of Oral Disease and the Department of Cleft Lip and Palate Surgery, West China College of Stomatology, Sichuan University, Chengdu, People's Republic of China
| | - Ling Li
- State Key Laboratory of Oral Disease and the Department of Cleft Lip and Palate Surgery, West China College of Stomatology, Sichuan University, Chengdu, People's Republic of China
| | - Jun Wu
- State Key Laboratory of Oral Disease and the Department of Cleft Lip and Palate Surgery, West China College of Stomatology, Sichuan University, Chengdu, People's Republic of China
| | - Lu-Ying Zhu
- State Key Laboratory of Oral Disease and the Department of Cleft Lip and Palate Surgery, West China College of Stomatology, Sichuan University, Chengdu, People's Republic of China
| | - Chao Yang
- State Key Laboratory of Oral Disease and the Department of Cleft Lip and Palate Surgery, West China College of Stomatology, Sichuan University, Chengdu, People's Republic of China
| | - Chun-Hui Chen
- State Key Laboratory of Oral Disease and the Department of Cleft Lip and Palate Surgery, West China College of Stomatology, Sichuan University, Chengdu, People's Republic of China
| | - Bing Shi
- State Key Laboratory of Oral Disease and the Department of Cleft Lip and Palate Surgery, West China College of Stomatology, Sichuan University, Chengdu, People's Republic of China
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30
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van den Boogaard MJH, de Costa D, Krapels IPC, Liu F, van Duijn C, Sinke RJ, Lindhout D, Steegers-Theunissen RPM. The MSX1 allele 4 homozygous child exposed to smoking at periconception is most sensitive in developing nonsyndromic orofacial clefts. Hum Genet 2008; 124:525-34. [PMID: 18932005 DOI: 10.1007/s00439-008-0569-6] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2008] [Accepted: 10/04/2008] [Indexed: 01/06/2023]
Abstract
Nonsyndromic orofacial clefts (OFC) are common birth defects caused by certain genes interacting with environmental factors. Mutations and association studies indicate that the homeobox gene MSX1 plays a role in human clefting. In a Dutch case-control triad study (mother, father, and child), we investigated interactions between MSX1 and the parents' periconceptional lifestyle in relation to the risk of OFC in their offspring. We studied 181 case- and 132 control mothers, 155 case- and 121 control fathers, and 176 case- and 146 control children, in which there were 107 case triads and 66 control triads. Univariable and multivariable logistic regression analyses were applied, and odds ratios (OR), 95% confidence intervals (CI) were calculated. Allele 4 of the CA marker in the MSX1 gene, consisting of nine CA repeats, was the most common allele found in both the case and control triads. Significant interactions were observed between allele 4 homozygosity of the child with maternal smoking (OR 2.7, 95% CI 1.1-6.6) and with smoking by both parents (OR 4.9, 95% CI 1.4-18.0). Allele 4 homozygosity in the mother and smoking showed a risk estimate of OR 3.2 (95% CI 1.1-9.0). If allele 4 homozygous mothers did not take daily folic acid supplements in the recommended periconceptional period, this also increased the risk of OFC for their offspring (OR 2.8, 95% CI 1.1-6.7). Our findings show that, in the Dutch population, periconceptional smoking by both parents interacts with a specific allelic variant of MSX1 to significantly increase OFC risk for their offspring. Possible underlying mechanisms are discussed.
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Abstract
Cleft lip with or without cleft palate is the most common facial birth defect and it is caused by a complex interaction between genetic and environmental factors. The purpose of this review is to provide an overview of the spectrum of the genetic causes for cleft lip and cleft palate using both syndromic and nonsyndromic forms of clefting as examples. Although the gene identification process for orofacial clefting in humans is in the early stages, the pace is rapidly accelerating. Recently, several genes have been identified that have a combined role in up to 20% of all clefts. While this is a significant step forward, it is apparent that additional cleft causing genes have yet to be identified. Ongoing human genome-wide linkage studies have identified regions in the genome that likely contain genes that when mutated cause orofacial clefting, including a major gene on chromosome 9 that is positive in multiple racial groups. Currently, efforts are focused to identify which genes are mutated in these regions. In addition, parallel studies are also evaluating genes involved in environmental pathways. Furthermore, statistical geneticists are developing new methods to characterize both gene-gene and gene-environment interactions to build better models for pathogenesis of this common birth defect. The ultimate goal of these studies is to provide knowledge for more accurate risk counseling and the development of preventive therapies.
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Affiliation(s)
- Andrew C. Lidral
- Department of Orthodontics, University of Iowa, Iowa City, IA
- Dows Institute for Dental Research, University of Iowa, Iowa City, IA
- Craniofacial Anomalies Research Center, University of Iowa, Iowa City, IA
| | - Lina M. Moreno
- Department of Orthodontics, University of Iowa, Iowa City, IA
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Milunsky JM, Maher TA, Zhao G, Roberts AE, Stalker HJ, Zori RT, Burch MN, Clemens M, Mulliken JB, Smith R, Lin AE. TFAP2A mutations result in branchio-oculo-facial syndrome. Am J Hum Genet 2008; 82:1171-7. [PMID: 18423521 DOI: 10.1016/j.ajhg.2008.03.005] [Citation(s) in RCA: 152] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2008] [Revised: 03/07/2008] [Accepted: 03/12/2008] [Indexed: 01/16/2023] Open
Abstract
Branchio-oculo-facial syndrome (BOFS) is a rare autosomal-dominant cleft palate-craniofacial disorder with variable expressivity. The major features include cutaneous anomalies (cervical, infra- and/or supra-auricular defects, often with dermal thymus), ocular anomalies, characteristic facial appearance (malformed pinnae, oral clefts), and, less commonly, renal and ectodermal (dental and hair) anomalies. The molecular basis for this disorder is heretofore unknown. We detected a 3.2 Mb deletion by 500K SNP microarray in an affected mother and son with BOFS at chromosome 6p24.3. Candidate genes in this region were selected for sequencing on the basis of their expression patterns and involvement in developmental pathways associated with the clinical findings of BOFS. Four additional BOFS patients were found to have de novo missense mutations in the highly conserved exons 4 and 5 (basic region of the DNA binding domain) of the TFAP2A gene in the candidate deleted region. We conclude BOFS is caused by mutations involving TFAP2A. More patients need to be studied to determine possible genetic heterogeneity and to establish whether there are genotype-phenotype correlations.
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Affiliation(s)
- Jeff M Milunsky
- Center for Human Genetics, Boston University School of Medicine, Boston, MA 02118-2526, USA.
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33
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Juriloff DM, Harris MJ. Mouse genetic models of cleft lip with or without cleft palate. ACTA ACUST UNITED AC 2008; 82:63-77. [DOI: 10.1002/bdra.20430] [Citation(s) in RCA: 105] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Ehlers Bertoja A, Sampaio Alho C, De França E, Menegotto B, Miriam Robinson W. TGFA/TAQ I polymorphism in nonsyndromic cleft lip and palate patients from Rio Grande Do Sul, Brazil. Cleft Palate Craniofac J 2008; 45:539-44. [PMID: 18788876 DOI: 10.1597/07-087.1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
OBJECTIVE To test the TGFA/Taq I polymorphism in the development of nonsyndromic cleft lip and palate. DESIGN AND SETTING The research was based on a case-control study, including nonsyndromic cleft lip and palate patients (140 individuals) and a control sample of unaffected individuals (142) to ascertain the absence or presence of genic mutation at the TGFA locus. INTERVENTIONS The DNA of carriers of nonsyndromic cleft lip with or without cleft palate was obtained by buccal swab, and the DNA of the control group was extracted from peripheral blood leucocytes. TGFA/Taq I polymorphism was determined genetically by polymerase chain reaction using specific primers and fragment digestion with Taq I restriction enzyme. RESULTS No significant association was detected when patients and controls were compared with the genotype for TGFA/Taq I polymorphism. CONCLUSION Mutations in TGFA gene have no association with nonsyndromic cleft lip and palate in the sample from Rio Grande do Sul. Therefore, based on this study, it is not possible to determine the role played by TGFA in the expression of cleft lip and palate.
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Affiliation(s)
- Angela Ehlers Bertoja
- Odontology (Buccomaxilofacial Surgery and Traumatology) at the Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Brazil.
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Otero L, Gutiérrez S, Cháves M, Vargas C, Bérmudez L. Association of MSX1 with nonsyndromic cleft lip and palate in a Colombian population. Cleft Palate Craniofac J 2008; 44:653-6. [PMID: 18177186 DOI: 10.1597/06-097.1] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
OBJECTIVE To evaluate the association between MSX1 CA polymorphism and nonsyndromic cleft lip with or without cleft palate (CL+/-P) in a group of patients from Operation Smile Colombia. DESIGN Four alleles from MSX1 CA microsatellite sequence were analyzed. Polymerase chain reaction was carried out. The amplifications were performed by Short Tandem Repeats (STRs) in ABI PRISM 310 genetic analyzer. Chi-square and odds ratio tests were used to determine the association between genotype frequencies and the risk to the cleft lip/palate in a Colombian group population. SETTING Operation Smile Colombia. PARTICIPANTS Ninety-four affected patients (49 men and 45 women with CL+/-P) and 93 control individuals (43 men and 50 women). RESULTS A significant statistical difference (p<.0106) was found between the patients who carried allele 3 and CL+/-P. In addition, allele 4 (heterozygous and homozygous form) was the most frequent in CL+/-P (74%) patients and in the control group (82%). CONCLUSIONS These findings show a positive association between the MSX1 CA polymorphism and CL+/-P in a Colombian group population.
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Carinci F, Scapoli L, Palmieri A, Zollino I, Pezzetti F. Human genetic factors in nonsyndromic cleft lip and palate: an update. Int J Pediatr Otorhinolaryngol 2007; 71:1509-19. [PMID: 17606301 DOI: 10.1016/j.ijporl.2007.06.007] [Citation(s) in RCA: 90] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2007] [Revised: 05/30/2007] [Accepted: 06/02/2007] [Indexed: 10/23/2022]
Abstract
Nonsyndromic cleft lip and/or palate (or orofacial cleft, OFC) is a malformation characterized by an incomplete separation between nasal and oral cavities without any associated anomalies. The last point defines the distinction between syndromic and nonsyndromic OFC. Nonsyndromic OFC is one of the most common malformations among live births and is composed of two separate entities: cleft lip with or without cleft palate (CL+/-P) and cleft palate isolated (CPI). Because of the complex etiology of nonsyndromic OFC, which is due to the differences between CL+/-P and CPI, and the heterogeneity of each group, caused by the number of genes involved, the type of inheritance, and the interaction with environmental factors, we reviewed those genes and available loci in the literature whose involvement in the onset of nonsyndromic OFC has more sound scientific evidence. Genetic studies on human populations have demonstrated that CL+/-P and CPI have distinct genetic backgrounds and, therefore, environmental factors probably disclose only these malformations. In CL+/-P several loci, OFC from 1 to 10 have been identified. The first locus, OFC1, has been mapped to chromosome 6p24. Other CL+/-P loci have been mapped to 2p13 (OFC2), 19q13.2 (OFC3) and 4q (OFC4). OFC5-8 are identified by mutations in the MSX1, IRF6, PVRL1, and TP73L gene, respectively. OFC9 maps to 13q33.1-q34, whereas OFC10 is associated with haploinsufficiency of the SUMO1 gene. In addition, MTHFR, TGF-beta3, and RARalpha play a role in cleft onset. In CPI one gene has been identified (TBX22) at present, but others are probably involved. Greater efforts are necessary in order to have a complete picture of the main factors involved in lip and palate formation. These elements will permit us to better understand and better treat patients affected by OFC.
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MESH Headings
- Chromosomes, Human, Pair 13/genetics
- Chromosomes, Human, Pair 19/genetics
- Chromosomes, Human, Pair 2/genetics
- Chromosomes, Human, Pair 6/genetics
- Chromosomes, Human, Pair 8/genetics
- Cleft Lip/genetics
- Cleft Palate/genetics
- Gene Expression/genetics
- Humans
- Polymorphism, Restriction Fragment Length/genetics
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Affiliation(s)
- Francesco Carinci
- Department of D.M.C.C.C., Section of Maxillofacial Surgery, University of Ferrara, Corso, Giovecca 203, 44100 Ferrara, Italy.
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37
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Baroni T, Bellucci C, Lilli C, Pezzetti F, Carinci F, Becchetti E, Carinci P, Stabellini G, Calvitti M, Lumare E, Bodo M. Retinoic acid, GABA-ergic, and TGF-beta signaling systems are involved in human cleft palate fibroblast phenotype. Mol Med 2007. [PMID: 17225872 DOI: 10.2119/2006-00026.baroni] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
During embryogenesis, a complex interplay between extracellular matrix (ECM) molecules, regulatory molecules, and growth factors mediates morphogenetic processes involved in palatogenesis. Transforming growth factor-beta (TGF-beta), retinoic acid (RA), and gamma-aminobutyric acid (GABA)ergic signaling systems are also potentially involved. Using [3H]glucosamine and [35S]methionine incorporation, anion exchange chromatography, semiquantitative radioactive RT-PCR, and a TGF-beta binding assay, we aimed to verify the presence of phenotypic differences between primary cultures of secondary palate (SP) fibroblasts from 2-year-old subjects with familial nonsyndromic cleft lip and/or palate (CLP-SP fibroblasts) and age-matched normal SP (N-SP) fibroblasts. The effects of RA--which, at pharmacologic doses, induces cleft palate in newborns of many species--were also studied. We found an altered ECM production in CLP-SP fibroblasts that synthesized and secreted more glycosaminoglycans (GAGs) and fibronectin (FN) compared with N-SP cells. In CLP-SP cells, TGF-beta3 mRNA expression and TGF-beta receptor number were higher and RA receptor-alpha (RARA) gene expression was increased. Moreover, we demonstrated for the first time that GABA receptor (GABRB3) mRNA expression was upregulated in human CLP-SP fibroblasts. In N-SP and CLP-SP fibroblasts, RA decreased GAG and FN secretion and increased TGF-beta3 mRNA expression but reduced the number of TGF-beta receptors. TGF-beta receptor type I mRNA expression was decreased, TGF-beta receptor type II was increased, and TGF-beta receptor type III was not affected. RA treatment increased RARA gene expression in both cell populations but upregulated GABRB3 mRNA expression only in N-SP cells. These results show that CLP-SP fibroblasts compared with N-SP fibroblasts exhibit an abnormal phenotype in vitro and respond differently to RA treatment, and suggest that altered crosstalk between RA, GABAergic, and TGF-beta signaling systems could be involved in human cleft palate fibroblast phenotype.
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Affiliation(s)
- Tiziano Baroni
- Department of Experimental Medicine and Biochemical Sciences, University of Perugia, Italy.
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38
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Baroni T, Bellucci C, Lilli C, Pezzetti F, Carinci F, Becchetti E, Carinci P, Stabellini G, Calvitti M, Lumare E, Bodo M. Retinoic acid, GABA-ergic, and TGF-beta signaling systems are involved in human cleft palate fibroblast phenotype. MOLECULAR MEDICINE (CAMBRIDGE, MASS.) 2007; 12:237-45. [PMID: 17225872 PMCID: PMC1770008 DOI: 10.2119/2006–00026.baroni] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 03/28/2006] [Accepted: 07/31/2006] [Indexed: 11/06/2022]
Abstract
During embryogenesis, a complex interplay between extracellular matrix (ECM) molecules, regulatory molecules, and growth factors mediates morphogenetic processes involved in palatogenesis. Transforming growth factor-beta (TGF-beta), retinoic acid (RA), and gamma-aminobutyric acid (GABA)ergic signaling systems are also potentially involved. Using [3H]glucosamine and [35S]methionine incorporation, anion exchange chromatography, semiquantitative radioactive RT-PCR, and a TGF-beta binding assay, we aimed to verify the presence of phenotypic differences between primary cultures of secondary palate (SP) fibroblasts from 2-year-old subjects with familial nonsyndromic cleft lip and/or palate (CLP-SP fibroblasts) and age-matched normal SP (N-SP) fibroblasts. The effects of RA--which, at pharmacologic doses, induces cleft palate in newborns of many species--were also studied. We found an altered ECM production in CLP-SP fibroblasts that synthesized and secreted more glycosaminoglycans (GAGs) and fibronectin (FN) compared with N-SP cells. In CLP-SP cells, TGF-beta3 mRNA expression and TGF-beta receptor number were higher and RA receptor-alpha (RARA) gene expression was increased. Moreover, we demonstrated for the first time that GABA receptor (GABRB3) mRNA expression was upregulated in human CLP-SP fibroblasts. In N-SP and CLP-SP fibroblasts, RA decreased GAG and FN secretion and increased TGF-beta3 mRNA expression but reduced the number of TGF-beta receptors. TGF-beta receptor type I mRNA expression was decreased, TGF-beta receptor type II was increased, and TGF-beta receptor type III was not affected. RA treatment increased RARA gene expression in both cell populations but upregulated GABRB3 mRNA expression only in N-SP cells. These results show that CLP-SP fibroblasts compared with N-SP fibroblasts exhibit an abnormal phenotype in vitro and respond differently to RA treatment, and suggest that altered crosstalk between RA, GABAergic, and TGF-beta signaling systems could be involved in human cleft palate fibroblast phenotype.
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Affiliation(s)
- Tiziano Baroni
- Department of Experimental Medicine and Biochemical Sciences, University of Perugia, Italy.
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39
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Radhakrishna U, Ratnamala U, Gaines M, Beiraghi S, Hutchings D, Golla J, Husain SA, Gambhir PS, Sheth JJ, Sheth FJ, Chetan GK, Naveed M, Solanki JV, Patel UC, Master DC, Memon R, Antonarakis GS, Antonarakis SE, Nath SK. Genomewide scan for nonsyndromic cleft lip and palate in multigenerational Indian families reveals significant evidence of linkage at 13q33.1-34. Am J Hum Genet 2006; 79:580-5. [PMID: 16909398 PMCID: PMC1559556 DOI: 10.1086/507487] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2006] [Accepted: 07/07/2006] [Indexed: 11/03/2022] Open
Abstract
Nonsyndromic cleft lip with or without cleft palate (CL-P) is a common congenital anomaly with incidence ranging from 1 in 300 to 1 in 2,500 live births. We analyzed two Indian pedigrees (UR017 and UR019) with isolated, nonsyndromic CL-P, in which the anomaly segregates as an autosomal dominant trait. The phenotype was variable, ranging from unilateral to bilateral CL-P. A genomewide linkage scan that used approximately 10,000 SNPs was performed. Nonparametric linkage (NPL) analysis identified 11 genomic regions (NPL>3.5; P<.005) that could potentially harbor CL-P susceptibility variations. Among those, the most significant evidence was for chromosome 13q33.1-34 at marker rs1830756 (NPL=5.57; P=.00024). This was also supported by parametric linkage; MOD score (LOD scores maximized over genetic model parameters) analysis favored an autosomal dominant model. The maximum LOD score was 4.45, and heterogeneity LOD was 4.45 (alpha =100%). Haplotype analysis with informative crossovers enabled the mapping of the CL-P locus to a region of approximately 20.17 cM (7.42 Mb) between SNPs rs951095 and rs726455. Thus, we have identified a novel genomic region on 13q33.1-34 that harbors a high-risk variant for CL-P in these Indian families.
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40
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Modesto A, Moreno LM, Krahn K, King S, Lidral AC. MSX1 and orofacial clefting with and without tooth agenesis. J Dent Res 2006; 85:542-6. [PMID: 16723652 PMCID: PMC2241923 DOI: 10.1177/154405910608500612] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
MSX1 has been considered a strong candidate for orofacial clefting, based on mouse expression studies and knockout models, as well as association and linkage studies in humans. MSX1 mutations are also causal for hereditary tooth agenesis. We tested the hypothesis that individuals with orofacial clefting with or without tooth agenesis have MSX1 coding mutations by screening 33 individuals with cleft lip with or without cleft palate (CL/P) and 19 individuals with both orofacial clefting and tooth agenesis. Although no MSX1 coding mutations were identified, the known 101C > G variant occurred more often in subjects with both CL/P and tooth agenesis (p = 0.0008), while the *6C-T variant was found more often in CL/P subjects (p = 0.001). Coding mutations in MSX1 are not the cause of orofacial clefting with or without tooth agenesis in this study population. However, the significant association of MSX1 with both phenotypes implies that MSX1 regulatory elements may be mutated.
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Affiliation(s)
- A Modesto
- Dows Institute for Dental Research, College of Dentistry, University of Iowa, IA 52242, USA
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41
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Vieira AR. Association between the transforming growth factor alpha gene and nonsyndromic oral clefts: a HuGE review. Am J Epidemiol 2006; 163:790-810. [PMID: 16495466 DOI: 10.1093/aje/kwj103] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Transforming growth factor alpha (TGFA) is a well-characterized mammalian growth factor. Since the first report of an association between DNA sequence variants at the TGFA genetic locus and nonsyndromic oral clefts, 47 studies have been carried out, producing conflicting results. In this review, the author synthesizes findings from published reports on the association between the TGFA gene and clefting in humans. Bias, lack of statistical power, and genuine population diversity can explain the diverse results. In the aggregate, TGFA is probably a genetic modifier of clefting in humans, which is consistent with the oligogenic model suggested for nonsyndromic oral clefts.
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Affiliation(s)
- Alexandre R Vieira
- Department of Oral Medicine and Pathology, School of Dental Medicine, University of Pittsburgh, 3501 Terrace Street, Pittsburgh, PA 15261, USA.
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42
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Lan Y, Ryan RC, Zhang Z, Bullard SA, Bush JO, Maltby KM, Lidral AC, Jiang R. Expression ofWnt9b and activation of canonical Wnt signaling during midfacial morphogenesis in mice. Dev Dyn 2006; 235:1448-54. [PMID: 16496313 PMCID: PMC2559872 DOI: 10.1002/dvdy.20723] [Citation(s) in RCA: 103] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Cleft lip with or without cleft palate (CLP) is the most common craniofacial birth defect in humans. Recently, mutations in the WNT3 and Wnt9b genes, encoding two members of the Wnt family of signaling molecules, were found associated with CLP in human and mice, respectively. To investigate whether Wnt3 and Wnt9b directly regulate facial development, we analyzed their developmental expression patterns and found that both Wnt3 and Wnt9b are expressed in the facial ectoderm at critical stages of midfacial morphogenesis during mouse embryogenesis. Whereas Wnt3 mRNA is mainly expressed in the maxillary and medial nasal ectoderm, Wnt9b mRNA is expressed in maxillary, medial nasal, and lateral nasal ectoderm. During lip fusion, Wnt9b, but not Wnt3, is expressed in the epithelial seam between the fusing medial and lateral nasal processes. Furthermore, we found that expression of TOPGAL, a transgenic reporter of activation of canonical Wnt signaling pathway, is specifically activated in the distal regions of the medial nasal, lateral nasal, and maxillary processes prior to lip fusion. During lip fusion, the epithelial seam between the medial and lateral nasal processes as well as the facial mesenchyme directly beneath the fusing epithelia strongly expresses TOPGAL. These data, together with the CLP lip phenotype in WNT3-/- humans and Wnt9b-/- mutant mice, indicate that Wnt3 and Wnt9b signal through the canonical Wnt signaling pathway to regulate midfacial development and lip fusion.
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Affiliation(s)
- Yu Lan
- Center for Oral Biology and Department of Biomedical Genetics, University of Rochester School of Medicine and Dentistry, Rochester, NY 14642
| | - Rosemary C. Ryan
- Departments of Biology, University of Rochester, Rochester, NY 14627
| | - Zunyi Zhang
- Center for Oral Biology and Department of Biomedical Genetics, University of Rochester School of Medicine and Dentistry, Rochester, NY 14642
| | - Steven A. Bullard
- Department of Orthodontics and Dows Institute for Dental Research, University of Iowa School of Dentistry, Iowa City, IA 52242
| | - Jeffrey O. Bush
- Center for Oral Biology and Department of Biomedical Genetics, University of Rochester School of Medicine and Dentistry, Rochester, NY 14642
| | - Kathleen M. Maltby
- Center for Oral Biology and Department of Biomedical Genetics, University of Rochester School of Medicine and Dentistry, Rochester, NY 14642
| | - Andrew C. Lidral
- Department of Orthodontics and Dows Institute for Dental Research, University of Iowa School of Dentistry, Iowa City, IA 52242
| | - Rulang Jiang
- Center for Oral Biology and Department of Biomedical Genetics, University of Rochester School of Medicine and Dentistry, Rochester, NY 14642
- Departments of Biology, University of Rochester, Rochester, NY 14627
- Author for Correspondence: Rulang Jiang, PhD, Center for Oral Biology, University of Rochester Medical Center, 601 Elmwood Avenue, Box 611, Rochester, NY 14642, Telephone: (585)273-1426, Fax: (585)276-0190,
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Juriloff DM, Harris MJ, McMahon AP, Carroll TJ, Lidral AC. Wnt9b is the mutated gene involved in multifactorial nonsyndromic cleft lip with or without cleft palate in A/WySn mice, as confirmed by a genetic complementation test. ACTA ACUST UNITED AC 2006; 76:574-9. [PMID: 16998816 DOI: 10.1002/bdra.20302] [Citation(s) in RCA: 100] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND Nonsyndromic cleft lip (CL) with or without cleft palate (CLP) is a common human birth defect with complex genetic etiology. One of the unidentified genes maps to chromosome 17q21. A mouse strain, A/WySn, has CLP with complex genetic etiology that models the human defect, and 1 of its causative genes, clf1, maps to a region homologous to human 17q21. Extensive studies of the candidate region pointed to a novel insertion of an IAP transposon 3' from the gene Wnt9b as the clf1 mutation. Independently a recessive knockout mutation of Wnt9b (Wnt9b-) was reported to cause a lethal syndrome that includes some CLP. METHODS A standard genetic test of allelism between clf1 and the Wnt9b- mutation was done. A total of 83 F1 embryos at gestation day 14 (GD 14) from Wnt9b-/+ males crossed with A/WySn females, and 79 BC1 GD 14 embryos from F1 Wnt9b-/clf1 males back-crossed to A/WySn females were observed for CL. Embryo genotypes at clf1 and Wnt9b were obtained from DNA markers. Genotypes for a second unlinked modifier locus from A/WySn, clf2, were similarly obtained. RESULTS The compound mutant embryos (Wnt9b-/clf1) had high frequencies of CL: 27% in the F1 and 63% in the BC1. The clf2 modifier gene was found to have 3 alleles segregating in this study and to strongly influence the penetrance of CL in the compound mutant. CONCLUSIONS The noncomplementation of clf1 and Wnt9b- confirms that clf1 is a mutation of the Wnt9b gene. The homologous human WNT9B gene and 3' conserved noncoding region should be examined for a role in human nonsyndromic CLP.
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Affiliation(s)
- Diana M Juriloff
- Department of Medical Genetics, University of British Columbia, Vancouver, British Columbia, Canada.
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Abstract
PURPOSE OF REVIEW Orofacial clefts are common birth defects with a known genetic component to their etiology. Most orofacial clefts are nonsyndromic, isolated defects, which can be separated into two different phenotypes: (1) cleft lip with or without cleft palate and (2) cleft palate only. Both are genetically complex traits, which has limited the ability to identify disease loci or genes. The purpose of this review is to summarize recent progress of human genetic studies in identifying causal genes for isolated or nonsyndromic cleft lip with or without cleft palate. RECENT FINDINGS The results of multiple genome scans and a subsequent meta-analysis have significantly advanced our knowledge by revealing novel loci. Furthermore, candidate gene approaches have identified important roles for IRF6 and MSX1. To date, causal mutations with a known functional effect have not yet been described. SUMMARY With the implementation of genome-wide association studies and inexpensive sequencing, future studies will identify disease genes and characterize both gene-environment and gene-gene interactions to provide knowledge for risk counseling and the development of preventive therapies.
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Affiliation(s)
- Andrew C Lidral
- Department of Orthodontics, University of Iowa, Iowa City, Iowa 52242, USA.
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Juriloff DM, Harris MJ, Dewell SL, Brown CJ, Mager DL, Gagnier L, Mah DG. Investigations of the genomic region that contains the clf1 mutation, a causal gene in multifactorial cleft lip and palate in mice. ACTA ACUST UNITED AC 2005; 73:103-13. [PMID: 15690355 DOI: 10.1002/bdra.20106] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
BACKGROUND Human nonsyndromic cleft lip and palate, CL(P), is genetically complex, with one contributing gene on chromosome 17q. A potentially homologous gene, clf1 on distal chromosome 11, is part of the digenic cause of the 10-30% CL(P) in the A/WySn mouse strain. Here we report our progress toward identifying the clf1 mutation. METHODS Transcription from all of the known and predicted genes in the 1.5-Mb candidate region was examined in A/WySn and control (AXB-4/Pgn) ED10-11 embryo heads. The marker haplotype for 28 inbred strains across the clf1 region was obtained. The entire transcripts of Wnt9b and Wnt3 in A/WySn were sequenced. Using long PCR, the genomic region from Wnt3 throughWnt9b was screened in A/WySn for an inserted retrotransposon. RESULTS Gosr2, Wnt9b, Wnt3, Nsf, Arf2, Crhr1, Mapt, Cdc27, Myl4, Itgb3, chr11_20.152, chr11_20.154, chr11_20.155, and chr11_20.156 are expressed in ED10-11 heads. None is absent or detectably reduced in A/WySn. The ancestral pre-clf1 mutation haplotype was found in CBA/J mice. By a test-cross, CBA/J was confirmed to lack the clf1 mutation. Three single-nucleotide variants in A/WySn (vs. C57BL/6J) were found in each of the 3' untranslated regions (3'UTRs) of Wnt3 and of Wnt9b, respectively; their presence in CBA/J shows that none are the clf1 mutation. An inserted intracisternal A particle (IAP) retrotransposon located 6.6 kb from the 3' end of Wnt9b was found in A/WySn and in all clf1 strains tested. This IAP is absent in C57BL/6J and CBA/J. CONCLUSIONS The clf1 mutation is a genomic alteration present in A/WySn and absent in the ancestral chromosomal segment in CBA/J. The IAP retrotransposon insertion near Wnt9b in A/WySn fits this criterion; we predict that interference with Wnt9b function by this IAP is the clf1 mutation.
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Affiliation(s)
- Diana M Juriloff
- Department of Medical Genetics, University of British Columbia, Vancouver, British Columbia, Canada.
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Scapoli L, Marchesini J, Martinelli M, Pezzetti F, Carinci F, Palmieri A, Rullo R, Gombos F, Tognon M, Carinci P. Study of folate receptor genes in nonsyndromic familial and sporadic cleft lip with or without clef palate cases. Am J Med Genet A 2004; 132A:302-4. [PMID: 15690375 DOI: 10.1002/ajmg.a.30469] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Folate receptor family members (FOLRs) mediate the delivery of 5-methyltetrahydrofolate to the interior of, out of within, or between cells in a process known as potocytosis. Three FOLRs and a pseudogene map to 11q13.4. The aim of this study was to verify whether FOLRs could be responsible for the onset of nonsyndromic cleft lip with or without cleft palate (CL/P). Linkage and linkage disequilibrium between genetic markers and disorder were analyzed. Patients and their mothers from 71 familial CL/P pedigrees and 75 sporadic cases from Italian population were investigated by PCR-SSCP analysis. Data from mutation scanning allowed us to find only a silent mutation in FOLR1 present in a mother and her child. Our findings do not support FOLR1 and FOLR2 genes in the onset of CL/P.
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Affiliation(s)
- Luca Scapoli
- Department of Morphology and Embryology, Section of Histology and Embryology, Chair of Applied Biology and Center of Biotechnology, University of Ferrara, Via Fossato di Mortara, Ferrara, Italy.
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Zucchero TM, Cooper ME, Maher BS, Daack-Hirsch S, Nepomuceno B, Ribeiro L, Caprau D, Christensen K, Suzuki Y, Machida J, Natsume N, Yoshiura KI, Vieira AR, Orioli IM, Castilla EE, Moreno L, Arcos-Burgos M, Lidral AC, Field LL, Liu YE, Ray A, Goldstein TH, Schultz RE, Shi M, Johnson MK, Kondo S, Schutte BC, Marazita ML, Murray JC. Interferon regulatory factor 6 (IRF6) gene variants and the risk of isolated cleft lip or palate. N Engl J Med 2004; 351:769-80. [PMID: 15317890 DOI: 10.1056/nejmoa032909] [Citation(s) in RCA: 425] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
BACKGROUND Cleft lip or palate (or the two in combination) is a common birth defect that results from a mixture of genetic and environmental factors. We searched for a specific genetic factor contributing to this complex trait by examining large numbers of affected patients and families and evaluating a specific candidate gene. METHODS We identified the gene that encodes interferon regulatory factor 6 (IRF6) as a candidate gene on the basis of its involvement in an autosomal dominant form of cleft lip and palate, Van der Woude's syndrome. A single-nucleotide polymorphism in this gene results in either a valine or an isoleucine at amino acid position 274 (V274I). We carried out transmission-disequilibrium testing for V274I in 8003 individual subjects in 1968 families derived from 10 populations with ancestry in Asia, Europe, and South America, haplotype and linkage analyses, and case-control analyses, and determined the risk of cleft lip or palate that is associated with genetic variation in IRF6. RESULTS Strong evidence of overtransmission of the valine (V) allele was found in the entire population data set (P<10(-9)); moreover, the results for some individual populations from South America and Asia were highly significant. Variation at IRF6 was responsible for 12 percent of the genetic contribution to cleft lip or palate and tripled the risk of recurrence in families that had already had one affected child. CONCLUSIONS DNA-sequence variants associated with IRF6 are major contributors to cleft lip, with or without cleft palate. The contribution of variants in single genes to cleft lip or palate is an important consideration in genetic counseling.
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