Parent-of-origin effects on cardiac response to pressure overload in mice

Cordelia J. Barrick, Anping Dong, Rebekah Waikel, Drew Corn, Fanmuyi Yang, David W. Threadgill, Susan S. Smyth

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

Left ventricular (LV) hypertrophy (LVH) is an independent risk factor for cardiovascular mortality and is commonly caused by hypertension. In rodents, transverse aortic constriction (TAC) is a model regularly employed in mechanistic studies of the response of the LV to pressure overload. We previously reported that inbred strains of male mice manifest different cardiac responses to TAC, with C57BL/6J (B6) developing LV dilatation and impaired contractility and 129S1/SvImJ (129) males displaying concentric LVH. In the present study, we investigated sex and parent-of-origin effects on the response to TAC by comparing cardiac function, organ weights, expression of cardiac hypertrophy markers, and histology in female B6 and female 129 mice and in F1 progeny of reciprocal crosses between B6 and 129 mice (B6129F1 and 129B6F1). Five weeks after TAC, heart weight increased to the greatest extent in 129B6F1 mice and the least extent in 129 and B6129F1 mice. Female 129B6F1 and B6 mice were relatively protected from the increase in heart weight that occurs in their male counterparts with pressure overload. The response to TAC in 129 consomic mice bearing the B6 Y chromosome resembled that of 129 rather than 129B6F1 mice, indicating that the B6 Y chromosome does not account for the differences in the reciprocal cross. Our results suggest that susceptibility to LVH is more complex than simple Mendelian inheritance and that parental origin effects strongly impact the LV response to TAC in these commonly used inbred strains.

Original languageEnglish
Pages (from-to)H1003-H1009
JournalAmerican Journal of Physiology - Heart and Circulatory Physiology
Volume297
Issue number3
DOIs
StatePublished - Sep 2009

Keywords

  • Cardiac fibrosis
  • Imprinting
  • Left ventricular hypertrophy
  • Transaortic constriction

ASJC Scopus subject areas

  • Physiology
  • Cardiology and Cardiovascular Medicine
  • Physiology (medical)

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