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Gowans LJJ, Oseni G, Mossey PA, Adeyemo WL, Eshete MA, Busch TD, Donkor P, Obiri-Yeboah S, Plange-Rhule G, Oti AA, Owais A, Olaitan PB, Aregbesola BS, Oginni FO, Bello SA, Audu R, Onwuamah C, Agbenorku P, Ogunlewe MO, Abdur-Rahman LO, Marazita ML, Adeyemo AA, Murray JC, Butali A. Novel GREM1 Variations in Sub-Saharan African Patients With Cleft Lip and/or Cleft Palate. Cleft Palate Craniofac J 2018; 55:736-742. [PMID: 29489415 DOI: 10.1177/1055665618754948] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE Cleft lip and/or cleft palate (CL/P) are congenital anomalies of the face and have multifactorial etiology, with both environmental and genetic risk factors playing crucial roles. Though at least 40 loci have attained genomewide significant association with nonsyndromic CL/P, these loci largely reside in noncoding regions of the human genome, and subsequent resequencing studies of neighboring candidate genes have revealed only a limited number of etiologic coding variants. The present study was conducted to identify etiologic coding variants in GREM1, a locus that has been shown to be largely associated with cleft of both lip and soft palate. PATIENTS AND METHOD We resequenced DNA from 397 sub-Saharan Africans with CL/P and 192 controls using Sanger sequencing. Following analyses of the sequence data, we observed 2 novel coding variants in GREM1. These variants were not found in the 192 African controls and have never been previously reported in any public genetic variant database that includes more than 5000 combined African and African American controls or from the CL/P literature. RESULTS The novel variants include p.Pro164Ser in an individual with soft palate cleft only and p.Gly61Asp in an individual with bilateral cleft lip and palate. The proband with the p.Gly61Asp GREM1 variant is a van der Woude (VWS) case who also has an etiologic variant in IRF6 gene. CONCLUSION Our study demonstrated that there is low number of etiologic coding variants in GREM1, confirming earlier suggestions that variants in regulatory elements may largely account for the association between this locus and CL/P.
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Affiliation(s)
- Lord Jephthah Joojo Gowans
- 1 Cleft Clinic, Komfo Anokye Teaching Hospital and Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Ganiyu Oseni
- 2 Department of Plastic Surgery, Ladoke Akintola University of Science and Technology, Osogbo, Nigeria
| | - Peter A Mossey
- 3 Department of Orthodontics, University of Dundee, Dundee, United Kingdom
| | - Wasiu Lanre Adeyemo
- 4 Department of Oral and Maxillofacial Surgery, University of Lagos, Lagos, Nigeria
| | - Mekonen A Eshete
- 5 Addis Ababa University, School of Public Health, Addis Ababa, Ethiopia
| | - Tamara D Busch
- 6 Department of Pediatrics, University of Iowa, Iowa City, IA, USA
| | - Peter Donkor
- 1 Cleft Clinic, Komfo Anokye Teaching Hospital and Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Solomon Obiri-Yeboah
- 1 Cleft Clinic, Komfo Anokye Teaching Hospital and Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Gyikua Plange-Rhule
- 1 Cleft Clinic, Komfo Anokye Teaching Hospital and Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Alexander A Oti
- 1 Cleft Clinic, Komfo Anokye Teaching Hospital and Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Arwa Owais
- 7 Department of Pediatric Dentistry, University of Iowa, Iowa City, IA, USA
| | - Peter B Olaitan
- 2 Department of Plastic Surgery, Ladoke Akintola University of Science and Technology, Osogbo, Nigeria
| | - Babatunde S Aregbesola
- 8 Department of Oral and Maxillofacial Surgery, Obafemi Awolowo University, Ile-Ife, Nigeria
| | - Fadekemi O Oginni
- 8 Department of Oral and Maxillofacial Surgery, Obafemi Awolowo University, Ile-Ife, Nigeria
| | | | - Rosemary Audu
- 10 Department of Virology, Nigerian Institute of Medical Research, Lagos, Nigeria
| | - Chika Onwuamah
- 10 Department of Virology, Nigerian Institute of Medical Research, Lagos, Nigeria
| | - Pius Agbenorku
- 1 Cleft Clinic, Komfo Anokye Teaching Hospital and Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Mobolanle O Ogunlewe
- 4 Department of Oral and Maxillofacial Surgery, University of Lagos, Lagos, Nigeria
| | - Lukman O Abdur-Rahman
- 11 Division of Pediatric Surgery, Department of Surgery, University of Ilorin, Ilorin, Nigeria
| | - Mary L Marazita
- 12 Center for Craniofacial and Dental Genetics, Department of Oral Biology, University of Pittsburgh, Pittsburgh, PA, USA.,13 Department of Human Genetics, University of Pittsburgh, Pittsburgh, PA, USA
| | - A A Adeyemo
- 14 National Human Genome Research Institute, Bethesda, MD, USA
| | - Jeffrey C Murray
- 6 Department of Pediatrics, University of Iowa, Iowa City, IA, USA
| | - Azeez Butali
- 15 Department of Oral Pathology, Radiology and Medicine, University of Iowa, Iowa City, IA, USA
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