Association between risk polymorphisms for neurodegenerative diseases and cognition in colombian patients with frontotemporal dementia.

Unlabelled: Frontotemporal dementia (FTD) is a heterogeneous neurodegenerative disease of presenile onset. A better characterization of neurodegenerative disorders has been sought by using tools such as genome-wide association studies (GWAS), where associations between single nucleotide polymorphisms (SNPs) and cognitive profiles could constitute predictive biomarkers for these diseases. However, in FTD, associations between genotypes and cognitive phenotypes are yet to be explored.

Experiences of the Molecular Diagnosis of Fragile X Syndrome in Ecuador.

Fragile X syndrome (FXS) is the most common cause of hereditary intellectual disability and the second most common cause of intellectual disability of genetic etiology. This complex neurodevelopmental disorder is caused by an alteration in the CGG trinucleotide expansion in fragile X mental retardation gene 1 () leading to gene silencing and the subsequent loss of its product: fragile X mental retardation protein 1 (FMRP). Molecular diagnosis is based on polymerase chain reaction (PCR) screening followed by Southern blotting (SB) or Triplet primer-PCR (TP-PCR) to determine the number of CGG repeats in the gene.

Analysis of Heritability Across the Clinical Phenotypes of Frontotemporal Dementia and the Frequency of the C9ORF72 in a Colombian Population.

Frontotemporal dementia (FTD) is a highly heritable condition. Up to 40% of FTD is familial and an estimated 15% to 40% is due to single-gene mutations. It has been estimated that the G4C2 hexanucleotide repeat expansions in the C9ORF72 gene can explain up to 37.

Preimplantation genetic testing in assisted reproduction.

In the last years technologies have been developed that allow obtaining genetic information in less time and at lower cost, revolutionizing the genetic diagnosis in reproductive medicine, with availability of genetic tests from conception. High throughput sequencing analyses have increased the ability to detect embryos with genetic diseases, which has contributed to the better selection of embryos for in-vitro fertilization and, therefore, better reproductive outcomes. The preimplantation genetic testing (PGT) includes three subcategories of PGT for aneuploidies (PGT-A), PGT for single gene/monogenic disorders (PGT-M), and PGT for chromosome structural rearrangements (PGT-SR).