Unraveling the Genetic Threads of History: mtDNA HVS-I Analysis Reveals the Ancient Past of the Aburra Valley.

This article presents a comprehensive genetic study focused on pre-Hispanic individuals who inhabited the Aburrá Valley in Antioquia, Colombia, between the tenth and seventeenth centuries AD. Employing a genetic approach, the study analyzed maternal lineages using DNA samples obtained from skeletal remains. The results illuminate a remarkable degree of biological diversity within these populations and provide insights into their genetic connections with other ancient and indigenous groups across the American continent. The findings strongly support the widely accepted hypothesis that the migration of the first American settlers occurred through Beringia, a land bridge connecting Siberia to North America during the last Ice Age. Subsequently, these early settlers journeyed southward, crossing the North American ice cap. Of particular note, the study unveils the presence of ancestral lineages from Asian populations, which played a pivotal role in populating the Americas. The implications of these results extend beyond delineating migratory routes and settlement patterns of ancient populations. They also enrich our understanding of the genetic diversity inherent in indigenous populations of the region. By revealing the genetic heritage of pre-Hispanic individuals from the Aburrá Valley, this study offers valuable insights into the history of human migration and settlement in the Americas. Furthermore, it enhances our comprehension of the intricate genetic tapestry that characterizes indigenous communities in the area.

High Mitochondrial Haplotype Diversity Found in Three Pre-Hispanic Groups from Colombia.

The analysis of mitochondrial DNA (mtDNA) hypervariable region (HVR) sequence data from ancient human remains provides valuable insights into the genetic structure and population dynamics of ancient populations. mtDNA is particularly useful in studying ancient populations, because it is maternally inherited and has a higher mutation rate compared to nuclear DNA. To determine the genetic structure of three Colombian pre-Hispanic populations and compare them with current populations, we determined the haplotypes from human bone remains by sequencing several mitochondrial DNA segments. A wide variety of mitochondrial polymorphisms were obtained from 33 samples. Our results support a high population heterogeneity among pre-Hispanic populations in Colombia.

Clinical aspects associated with syndromic forms of Orofacial Clefts in a Colombian population / Aspectos Clínicos asociados a Fisuras Orofaciales en una población Colombiana

Objectives: To present descriptive epidemiology of Orofacial Clefts and to determine the association of syndromic forms with antenatal high-risk conditions, preterm birth, and comorbidities among nested-series of cases. Methods: A study of nested-series of cases was conducted. Frequencies of cleft type, associated congenital anomalies, syndromic, non-syndromic and multiple malformation forms, and distribution of Orofacial Clefts according to sex and affected-side were determined. Odds ratios were calculated as measures of association between syndromic forms and antenatal high-risk conditions, preterm birth and comorbidities. A total of three hundred and eleven patients with Orofacial Clefts were assessed in a 12-month period. Results: The most frequent type of Orofacial Clefts was cleft lip and palate, this type of cleft was more frequent in males, whereas cleft palate occurred more often in females. The most common cases occurred as non-syndromic forms. Aarskog-Scott syndrome showed the highest frequency amongst syndromic forms. Hypertensive disorders in pregnancy, developmental dysplasia of the hip, central nervous diseases and respiratory failure showed significant statistical associations (p <0.05) with syndromic forms. Conclusions: These data provide an epidemiological reference of Orofacial Clefts in Colombia. Novel associations between syndromic forms and clinical variables are determined. In order to investigate causality relationships between these variables further studies must be carried out.

Objetivos: Presentar la epidemiología descriptiva en torno a las Fisuras Orofaciales y determinar asociaciones entre Fisuras Orofaciales sindromica y antecedentes antenatales de alto riesgo, parto pretérmino, y comorbilidades en una población Colombiana. Métodos: Se planteó un estudio de serie de casos anidado estratificado. Se calcularon frecuencias en relación al tipo de fisura desde el punto de vista anatómico, anomalías congénitas paralelas, morbilidades y forma clínica. Se analizó la distribución de las Fisuras Orofaciales de acuerdo al género y lateralidad. Se determinaron razones de disparidad entre la forma sindrómica y antecedentes antenatales de alto riesgo, parto pretérmino, y comorbilidades. Se evaluaron trecientos once pacientes que asistieron a la consulta de genética clinica durante un año. Resultados: La Fisura Labio-palatina fue el tipo más frecuente en la muestra evaluada y la más frecuente en hombres. La Fisura Palatina fué la más frecuente en mujeres, la forma clínica más común fue la no sindrómica. En la población sindrómica el Síndrome de Aarskog-Scott mostró la frecuencia más alta. Los trastornos Hipertensivos de Embarazo, la Displasia del Desarrollo de la Cadera, las enfermedades respiratorias y del sistema nervioso central mostraron una asociación estadísticamente significativa con la forma sindrómica. (p <0.05). Conclusiones: Estos datos ofrecen una referencia epidemiológica descriptiva de las Fisuras Orofaciales en Colombia. Las asociaciones encontradas entre los aspectos clínicos estudiados y la forma sindrómica, deben ser investigadas en próximos estudios con el fin de determinar relaciones de causalidad.

Clinical Aspects associated with Syndromic forms of Orofacial Clefts in a Colombian population.

OBJECTIVES: To present descriptive epidemiology of Orofacial Clefts and to determine the association of syndromic forms with antenatal high-risk conditions, preterm birth, and comorbidities among nested-series of cases. METHODS: A study of nested-series of cases was conducted. Frequencies of cleft type, associated congenital anomalies, syndromic, non-syndromic and multiple malformation forms, and distribution of Orofacial Clefts according to sex and affected-side were determined. Odds ratios were calculated as measures of association between syndromic forms and antenatal high-risk conditions, preterm birth and comorbidities. A total of three hundred and eleven patients with Orofacial Clefts were assessed in a 12-month period. RESULTS: The most frequent type of Orofacial Clefts was cleft lip and palate, this type of cleft was more frequent in males, whereas cleft palate occurred more often in females. The most common cases occurred as non-syndromic forms. Aarskog-Scott syndrome showed the highest frequency amongst syndromic forms. Hypertensive disorders in pregnancy, developmental dysplasia of the hip, central nervous diseases and respiratory failure showed significant statistical associations (p <0.05) with syndromic forms. CONCLUSIONS: These data provide an epidemiological reference of Orofacial Clefts in Colombia. Novel associations between syndromic forms and clinical variables are determined. In order to investigate causality relationships between these variables further studies must be carried out.

OBJETIVOS: Presentar la epidemiología descriptiva en torno a las Fisuras Orofaciales y determinar asociaciones entre Fisuras Orofaciales sindromica y antecedentes antenatales de alto riesgo, parto pretérmino, y comorbilidades en una población Colombiana. MÉTODOS: Se planteó un estudio de serie de casos anidado estratificado. Se calcularon frecuencias en relación al tipo de fisura desde el punto de vista anatómico, anomalías congénitas paralelas, morbilidades y forma clínica. Se analizó la distribución de las Fisuras Orofaciales de acuerdo al género y lateralidad. Se determinaron razones de disparidad entre la forma sindrómica y antecedentes antenatales de alto riesgo, parto pretérmino, y comorbilidades. Se evaluaron trecientos once pacientes que asistieron a la consulta de genética clinica durante un año. RESULTADOS: La Fisura Labio-palatina fue el tipo más frecuente en la muestra evaluada y la más frecuente en hombres. La Fisura Palatina fué la más frecuente en mujeres, la forma clínica más común fue la no sindrómica. En la población sindrómica el Síndrome de Aarskog-Scott mostró la frecuencia más alta. Los trastornos Hipertensivos de Embarazo, la Displasia del Desarrollo de la Cadera, las enfermedades respiratorias y del sistema nervioso central mostraron una asociación estadísticamente significativa con la forma sindrómica. (p <0.05). CONCLUSIONES: Estos datos ofrecen una referencia epidemiológica descriptiva de las Fisuras Orofaciales en Colombia. Las asociaciones encontradas entre los aspectos clínicos estudiados y la forma sindrómica, deben ser investigadas en próximos estudios con el fin de determinar relaciones de causalidad.