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      Síndrome Estrés Porcino Translated title: Porcine Stress Syndrome

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          Abstract

          El Síndrome Estrés Porcino o Hipertermia Maligna es una enfermedad hereditaria autosómica recesiva, de penetrancia incompleta donde el alelo mutado es denominado T y el alelo resistente al estrés C. Los cerdos susceptibles al estrés presentan muerte súbita previa al sacrificio o carne pálida, blanda y exudativa en la canal. El gen de la ryanodina mutado en el nucleótido 1843 causa el Síndrome Estrés Porcino. Este gen se ha estudiado y discutido ampliamente. A principios de los años 70 este gen se tornó importante para las empresas de genética, cuando se especuló con la existencia de una variación monogénica en la susceptibilidad al estrés. <A HREF="#r9">Eikelenboom y Minkema (1974)</A> demostraron que el Síndrome de Estrés se podía provocar con el gas halotano. La mayoría de los estudios entre cerdos estrés positivo y cerdos estrés negativo mostraron diferencias en pH, color, terneza y capacidad de retención de agua en la carne. Esta variación estaba directamente relacionada con la incidencia de carne pálida, blanda y exudativa en los dos genotipos. Mac Lennan y col. (1990) propusieron que el gen de la ryanodina era el gen candidato que predisponía a la Hipertermia Maligna. <A HREF="#r10">Fujii y col</A>. (1991) descubrieron la mutación responsable del Síndrome Estrés Porcino en el gen de la ryanodina, que codifica el canal liberador de calcio del retículo sarcoplásmico del miocito esquelético. Los análisis basados en ADN (PCR, RFLP) permiten diagnosticar los tres genotipos del SSP, dirigiendo la selección genética actual a conseguir cerdos resistentes al Síndrome Estrés Porcino.

          Translated abstract

          The Porcine Stress Syndrome or Malignant Hyperthermia is an inherited autosomal recessive disease, where the susceptible allele is denominated T and the normal stress- resistant allele C. The stress susceptible pigs present death prior to slauhgter and pale, soft and exudative meat in the carcass. The Ryr1 gene mutant in 1843 nucleotide is the cause of Porcine Stress Syndrome. This gene has been studied and discussed widely. At the beginning of the Seventies this gene was important for genetic companies when speculated with the existence of a monogenic variation in the susceptibility to stress, and <A HREF="#r9">Eikelenboom</A> and Minkema demonstrated that the Stress Syndrome could be caused by the halothane gas. Most of the studies in positive stress pigs and negative stress pigs showed differences in pH, colour, tenderness and water-holding capacity in the meat. This variation was related to the incidence of pale, soft, exudative meat in the two genotypes. In 1990 <A HREF="#r15">MacLennan</A> and collaborators proposed that the ryanodine receptor gene was the gene candidate that predisposed to Malignant Hyperthermia. <A HREF="#r10">Fujii in 1991</A> discovered the mutation responsible for the Porcine Stress Syndrome in the Ryr1 gene, which codifies the calcium release channel of the sarcoplasmic reticulum by the skeletal muscle. The analyses based on DNA (PCR, RFLP) allow to diagnose the three genotypes of the SSP, directing the present genetic selection to obtain resistant pigs to Porcine Stress Syndrome

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          Future challenges in pig genetics

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            Optimizing strategies for selection on major genes

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              Síndrome de estrés porcino: aplicación y ventajas de la PCR para su diagnóstico

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Journal
                amv
                Archivos de medicina veterinaria
                Arch. med. vet.
                Facultad de Ciencias Veterinarias, Universidad Austral de Chile (Valdivia )
                0301-732X
                2001
                : 33
                : 2
                : 125-135
                Article
                S0301-732X2001000200001
                10.4067/S0301-732X2001000200001
                b33d36bc-19fd-4088-b6af-62312b1837bd

                http://creativecommons.org/licenses/by/4.0/

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                SciELO Chile

                Self URI (journal page): http://www.scielo.cl/scielo.php?script=sci_serial&pid=0301-732X&lng=en
                Categories
                VETERINARY SCIENCES

                General veterinary medicine
                malignant hiperthermia,PSE meat,ryr1 gene,1843 nucleotide mutation,hipertermia maligna,carne PSE,gen ryr1,mutación nucleótido 1843

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