ArticleJournal of mother and child2025
Genetic and Epidemiological Aspects of Louis-Bar Syndrome Transmission: The Impact of Consanguineous Marriages on the Incidence of Hereditary Disorders.
Article in Journal of mother and child, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundThe aim of this study was to investigate the genetic and epidemiological aspects of Louis-Bar syndrome transmission in the population of Kyrgyzstan, with a particular focus on the impact of consanguineous marriages.
methodsThe study presents a clinical case of a family with three children affected by this disorder. All children exhibited characteristic manifestations, including progressive cerebellar ataxia of varying severity; conjunctival and cutaneous telangiectasias; recurrent infections; and delayed psychomotor development. In the eldest child, the clinical presentation resembled the ataxic form of cerebral palsy. Standardised scales assessing motor, manual, and communicative functions were used to evaluate the severity of ataxia.
resultsBrain magnetic resonance imaging confirmed cerebellar atrophy in the eldest child and cerebellar subatrophy in the middle and youngest children. All children demonstrated telangiectasias on the mucous membranes of the eyes and skin, as well as signs of immunodeficiency manifesting as frequent infections. Family pedigree analysis revealed consanguinity in the third generation (the maternal grandmother and paternal grandfather were biological siblings). Molecular genetic testing identified a homozygous c.5932G > A mutation in the ATM gene encoding a protein involved in DNA repair.
conclusionThe findings confirm that consanguineous unions increase the risk of developing Louis-Bar syndrome, as they elevate the likelihood of inheriting identical mutant alleles. This study highlights the importance of medical-genetic counselling and prenatal diagnostics in families at high risk of hereditary diseases, particularly in regions with a high prevalence of consanguineous marriages.
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