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TIP Revista Especializada en Ciencias Químico-Biológicas

2018, Number S2

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TIP Rev Esp Cienc Quim Biol 2018; 21 (S2)

Effect of severe malnutrition on mutation frequencies in the Pig-a gene in rat reticulocytes and erythrocytes

Pacheco-Martíneza MM, Cortés- Barberenaa E, Rodríguez-Cruza L, Ortiz-Muñiza R

Language: Spanish
References: 26
Page: 5-12
PDF size: 801.45 Kb.


ABSTRACT

Poor assimilation of food in the body leads to malnutrition or undernutrition (UN), a pathological condition with varying degrees and clinical manifestations.
In recent years, a new test using in vivo somatic mutation detection based on the gene glycosylphosphatidylinositol Class A (Pig-a) has been developed.
This gene is essential for the synthesis of glycosylphosphatidylinositol anchor (GPI) that attaches specific proteins to the cell surface. When a Pig-a mutation takes place, GPI synthesis is blocked; hence, proteins are not found on the cell membrane generating a negative GPI phenotype, which can be easily detected using flow cytometry. The Pig-a assay was used in this study to analyze gene damage in a malnutrition model exposed to mutagen N-ethyl-N-nitrosourea (ENU). The assay was based on a differential staining of reticulocytes (RET) and erythrocytes (E) from peripheral blood of Wistar strain rats. Increased frequencies of mutant (MF) Pig-a, which were analyzed by 1 X 106 cells for 8 weeks, indicated damage to the genetic material of cells. The results demonstrate that UN itself has a deleterious effect on the integrity of genetic material. The MF increased depending on the dose and the time rats were exposed to UN.


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