RESUMO
Multimerin-1 (Mmrn-1) is a soluble protein, also known as elastin microfibril interfacer 4 (EMILIN-4), found in platelets and in the endothelium of blood vessels. Its function and role in pathology are still not fully understood. Genetic modifications in alpha-synuclein gene (Snca) locus that mapped 160 Kb apart from Mmrn-1 in mouse genome, could weigh with regulatory elements of Mmrn-1 gene. We have studied the Mmrn-1 expression in brain cortex of three mouse lines with Snca knock-out: B6(Cg)-Sncatm1.2Vlb/J, B6;129-Sncatm1Sud/J, and B6;129X1-Sncatm1Rosl/J. The 35-fold increase for Mmrn-1 mRNA level have been found in B6;129X1-Sncatm1Rosl/J mice that carry in their genome foreign sequences including bacterial gene neo and a strong promoter of a mouse phosphoglycerate kinase (Pgk1) oriented towards Mmrn-1 gene. This effect on regulatory elements of Mmrn-1 gene as a result of modifications in Snca locus should be taken into consideration when using B6;129X1-Sncatm1Rosl/J line, that is widely applied for study of neurodegeneration mechanisms.
Assuntos
Proteínas Sanguíneas/genética , Encéfalo/metabolismo , Moléculas de Adesão Celular/genética , alfa-Sinucleína/genética , Animais , Regulação da Expressão Gênica/genética , Camundongos , Camundongos KnockoutRESUMO
Intragastric methionine (3 g/kg daily for 7 days) elevates homocysteine concentration and increases the endothelial dysfunction coefficient. This protocol of methionine treatment is an adequate model of hyperhomocysteine-induced endothelial dysfunction and can be used for studies of the endothelio- and cardioprotective effects of drugs.