Prevalência de portadores da mutação associada à deficiência da enzima ramificadora de glicogênio (GBED) em cavalos da raça quarto de milha

• Autor(a) principal: Araújo, César Erineudo Tavares de [UNESP]
• Data de Publicação: 2015
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/134089
• topic: Cavalo; Músculos - Doenças; Glicogenio; Hereditariedade; Aborto nos animais; Glycogen

The deficiency of glycogen branching enzyme [GBED] in horses is a fatal recessive hereditary disease, mainly characterized by abortions, stillbirths and birth of weak foals. The GBED is caused by a mutation in the gene GBE1. The aim of this study was to determine the prevalence of mutation carriers causing GBED in a population of Quarter horse animals used in five equestrian sports practiced in Brazil. Samples of blood and were obtained from 740 animals. After DNA purification, PCR reactions, automated direct sequencing and sequence analysis were performed. Of the 740 animals tested 59 were considered heterozygous for the mutation responsible for GBED representing a prevalence of 7.97% in the population studied. The prevalences of heterozygotes were higher in cutting (20%) and reining (10%) subgroups, followed by barrel racing (5%) and halter (3%), were not found heterozygous for the racing subgroup. The results demonstrate that the mutation is present in the Quarter horse Brazilian herd, and suggests that the disease (homozygous recessive) may be present without being noticed. So the GBED should be considered in the differential diagnosis in cases of abortion and stillbirths in Brazilian Quarter horses and strategies should be developed to prevent transmission of the mutation