PubMed · 261448
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A Devergie. 1979. [Hemolytic anemia].. https://pubmed.ncbi.nlm.nih.gov/261448/
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A 3-year-old female American Cocker Spaniel with a chronic hemolytic disorder and hemolytic crises was found to have M-type phosphofructokinase deficiency. This inherited erythroenzymopathy and myopathy is commonly diagnosed in English Springer Spaniels, but the family study of this Cocker Spaniel, although supporting an autosomal recessive mode of inheritance, did not reveal any English Springer Spaniel ancestors. Molecular genetic studies did, however, identify the same mutation in this dog as we previously reported in the English Springer Spaniel breed, suggesting that this mutation originated prior to the separation of these 2 breeds.
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In the process of generating transgenic mice, inserted foreign DNA can cause insertional inactivation of the flanking genetic locus and simultaneously provide a molecular tag for localizing and cloning the inactivated gene. We describe the case of an insertional mutation leading, in animals homozygous for the insertion, to severe anaemia that was lethal within a few days after birth. The haemolytic anaemia and microspherocytosis of the red cells strongly suggested membrane abnormalities of the erythrocytes. By in situ localization of the integration site, protein analysis of the red cell membranes, northern and Southern blot analyses, we were able to demonstrate that the integrated transgene had affected the alpha-spectrin gene locus.