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Objective:


To identify pathogenic variants in an Afro-Colombian Raizal family with risk factors for glaucoma.


Methods:


In the present study, whole exome sequencing was performed on seven members of a Raizal family from the archipelago of San Andrés, Providencia, and Santa Catalina, in the Caribbean region of Colombia. Four of them had been diagnosed with glaucoma. In addition, two healthy volunteers from the island were included.


Results:


Of the 198 single nucleotide variants associated with glaucoma previously reported by the DisGeNET database, four were identified in members of the Raizal family: rs11938093, rs7336216, rs3817672, and rs983034. Furthermore, single nucleotide variant rs983034 was identified in the Wnt ligand secretion mediator gene in all family members but not in healthy volunteers. Notably, WLS dysfunctions have been linked to pathology in the trabecular meshwork of the eye. The trabecular meshwork is an important regulator of the outflow of aqueous humor that maintains intraocular pressure (intraocular pressure) at normal levels. Damage to trabecular meshwork is associated with ocular hypertension, which leads to glaucoma progression. In relation to the other single nucleotide variants identified, their presence was confirmed in some members of the Raizal family. However, it is still unclear the pathophysiological cause that associates these single nucleotide variants with glaucoma. 


Conclusions:


It was possible to identify four non-synonymous single nucleotide variants that predict significant damage to the structure and function of genes associated with glaucoma pathology in an Afro-Colombian

Harry Castillo-Plata, Escuela de Ciencias Básicas, Universidad del Valle, Cali, Colombia

orcid_id14.png https://orcid.org/0000-0002-4239-7048

 

Nelson Rivera-Franco, Laboratorio TAO-Lab/CiBioFi, Departamento de Biología. Facultad de Ciencias Naturales y Exactas, Universidad del Valle, Cali, Colombia

orcid_id14.png https://orcid.org/0000-0002-4733-5452

 

Claudia Valencia-Peña, Doctorado en Ciencias Básicas Medicas, Escuela de Ciencias Básicas, Universidad del Valle. Cali, Colombia.

orcid_id14.png https://orcid.org/0000-0001-7125-1796

 

Wilmar Saldarriaga-Gil, Departamento de Morfología, Escuela de Ciencias Básicas, Universidad del Valle, Cali, Colombia.

orcid_id14.png https://orcid.org/0000-0001-7815-4390

 

Lyle Newball, Clínica Lynd Newball, Archipiélago de San Andrés, Providencia y Santa Catalina, Colombia

orcid_id14.png https://orcid.org/0000-0001-7553-6801

 

Andres Castillo Giraldo, Departamento de Biología. Facultad de Ciencias Naturales y Exactas, Universidad del Valle, Cali, Colombia. - Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, USA

orcid_id14.png https://orcid.org/0000-0001-9006-6721

 
Castillo-Plata, H., Rivera-Franco, N., Valencia-Peña, C., Saldarriaga-Gil, W., Newball, L., & Castillo Giraldo, A. (2023). Preliminary identification of pathogenic variants in an afro-Colombian raizal family with risk factors for glaucoma. Colombia Medica, 53(2), e2065107. https://doi.org/10.25100/cm.v53i2.5107 (Original work published August 31, 2022)

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Received 2021-11-15
Accepted 2022-04-21
Published 2023-05-04