Matrix metalloproteinase-2 mediates angiotensin II-induced hypertension

• Author / Creator

  Odenbach, Jeffrey

• Angiotensin II signals cardiovascular disease through metalloproteinases including MMP-2, MMP-7 and ADAM-17/TACE. We hypothesized that these metalloproteinases regulate each other at the transcriptional level. Further, MMP-2, being a major gelatinase in cardiac and vascular tissue, could mediate angiotensin II-induced cardiovascular disease.
  We studied the development of hypertension (by tail cuff plethysmography), cardiac hypertrophy (by M-mode echocardiography and qRT-PCR analysis of hypertrophy marker genes) and fibrosis (by collagen staining and qRT-PCR analysis of fibrosis marker genes) in mice receiving angiotensin II.
  Angiotensin II induced hypertension, cardiac hypertrophy and fibrosis which correlated with an upregulation of MMP-2. Downregulation of MMP-2 by pharmacological inhibition and RNA interference attenuated hypertension but not cardiac hypertrophy or fibrosis. Downregulation of MMP-7 or ADAM-17/TACE by RNA interference attenuated angiotensin II-induced MMP-2 upregulation as well as hypertension, cardiac hypertrophy and fibrosis.
  We conclude that MMP-2 selectively mediates angiotensin II-induced hypertension under the transcriptional control of MMP-7 and ADAM-17/TACE.

• Subjects / Keywords

  • Hypertensive cardiac remodelling
  • Hypertension
  • Angiotensin II
  • Cardiac fibrosis
  • RNA interference
  • Cardiac hypertrophy
  • Matrix metalloproteinase

• Graduation date

  Spring 2011

• Type of Item

  Thesis

• Degree

  Master of Science

• DOI

  https://doi.org/10.7939/R31T0F

• License

  This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for non-commercial purposes. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.