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Computational Model Finds New Protein-Protein Interactions
Researchers at University of Pittsburgh have discovered 500 new protein-protein interactions (PPIs) associated with genes linked to schizophrenia.
Experimental Drug Cancels Effect from Key Intellectual Disability Gene
A University of Wisconsin—Madison researcher who studies the most common genetic intellectual disability has used an experimental drug to reverse — in mice — damage from the mutation that causes the syndrome.
MicroRNA Pathway Could Lead to New Avenues for Leukemia Treatment
Cancer researchers at the University of Cincinnati have found a particular signaling route in microRNA (miR-22) that could lead to targets for acute myeloid leukemia, the most common type of fast-growing cancer of the blood and bone marrow.
Bioreactors Ready for the Big Time
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Analysis of Dog Genome will Provide Insight into Human Disease
An important model in studying human disease, the non-coding RNA of the canine genome is an essential starting point for evolutionary and biomedical studies – according to a new study led by The Genome Analysis Centre (TGAC).
‘Mini-Brains’ to Study Zika
Novel tool expected to speed research on brain and drug development.
Finding Factors That Protect Against Flu
A clinical trial examining the body’s response to seasonal flu suggests new approaches for evaluating the effectiveness of seasonal flu vaccines.
New Insights into Gene Regulation
Researchers have solved the three-dimensional structure of a gene repression complex that is known to play a role in cancer.
Controlling RNA in Living Cells
Modular, programmable proteins can be used to track or manipulate gene expression.
Common Class of Cancer Drugs May Not Lead to Cognitive Decline
UCLA study refutes 2015 research suggesting anthracyclines could cause memory loss, other impairments.
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American Journal of Human Biology
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Genetic variation of the FMR1 gene among four Mexican populations: Mestizo, Huichol, Purepecha, and Tarahumara. Patricio Barros-Núñez 1 *, Mónica Alejandra Rosales-Reynoso 1, Lucila Sandoval 1, Pavel Romero-Espinoza 1, Rogelio Troyo-Sanromán 2, Bertha Ibarra 1 1División de Genética, CIBO, Instituto Mexicano del Seguro Social, Guadalajara, Jalisco, México 2Departamento de Fisiología, CUCS, U de G, Guadalajara, Jalisco, México. ABSTRACT Fragile X syndrome is the most common cause of inherited mental retardation; it is caused by expansion of CGG repeats in the first exon of the FMR1 gene. The number of CGG repeats varies between 6 and 50 triplets in normal individuals; the most common alleles have 29 or 30 repeats. Allelic patterns in the global populations are similar; however; some reports show statistical differences among several populations. In Mexico, except by a single report on a western Mestizo population, the allelic frequencies of the FMR1 gene are unknown. In this study, we analyze 207, 140, 138, and 40 chromosomes from Mestizos, Tarahumaras, Huichols, and Purepechas respectively. After PCR amplification on DNA modified by sodium bisulfite treatment, molecular analysis of the FMR1 gene showed 30 different alleles among the 525 chromosomes evaluated. Trinucleotide repeat number in the different Mexican populations varied from 15 to 87, with modal numbers of 32 and 30 in Mestizos and Tarahumaras, 29 and 32 in Purepechas and 30 among Huichols. Together, these allelic patterns differ significantly from those reported for Caucasian, Chinese, African, Indonesian, Brazilian, and Chilean populations. The increased number of the unusual allele of 32 repeats observed in the Mexican mestizo population can be explained from its frequency in at least two Mexican native populations.

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