Chronic senolytic treatment alleviates established vasomotor dysfunction in aged or atherosclerotic mice

Carolyn M. Roos, Bin Zhang, Allyson K. Palmer, Mikolaj B. Ogrodnik, Tamar Pirtskhalava, Nassir M. Thalji, Michael Hagler, Diana Jurk, Leslie A. Smith, Grace Casaclang-Verzosa, Yi Zhu, Marissa J. Schafer, Tamara Tchkonia, James L. Kirkland, Jordan D. Miller

Research output: Contribution to journalArticle

225 Scopus citations

Abstract

While reports suggest a single dose of senolytics may improve vasomotor function, the structural and functional impact of long-term senolytic treatment is unknown. To determine whether long-term senolytic treatment improves vasomotor function, vascular stiffness, and intimal plaque size and composition in aged or hypercholesterolemic mice with established disease. Senolytic treatment (intermittent treatment with Dasatinib + Quercetin via oral gavage) resulted in significant reductions in senescent cell markers (TAF+ cells) in the medial layer of aorta from aged and hypercholesterolemic mice, but not in intimal atherosclerotic plaques. While senolytic treatment significantly improved vasomotor function (isolated organ chamber baths) in both groups of mice, this was due to increases in nitric oxide bioavailability in aged mice and increases in sensitivity to NO donors in hypercholesterolemic mice. Genetic clearance of senescent cells in aged normocholesterolemic INK-ATTAC mice phenocopied changes elicited by D+Q. Senolytics tended to reduce aortic calcification (alizarin red) and osteogenic signaling (qRT–PCR, immunohistochemistry) in aged mice, but both were significantly reduced by senolytic treatment in hypercholesterolemic mice. Intimal plaque fibrosis (picrosirius red) was not changed appreciably by chronic senolytic treatment. This is the first study to demonstrate that chronic clearance of senescent cells improves established vascular phenotypes associated with aging and chronic hypercholesterolemia, and may be a viable therapeutic intervention to reduce morbidity and mortality from cardiovascular diseases.

Original languageEnglish (US)
Pages (from-to)973-977
Number of pages5
JournalAging Cell
Volume15
Issue number5
DOIs
StatePublished - Oct 1 2016

Keywords

  • aging
  • atherosclerosis
  • calcification
  • endothelial function
  • fibrosis
  • senescence

ASJC Scopus subject areas

  • Aging
  • Cell Biology

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  • Cite this

    Roos, C. M., Zhang, B., Palmer, A. K., Ogrodnik, M. B., Pirtskhalava, T., Thalji, N. M., Hagler, M., Jurk, D., Smith, L. A., Casaclang-Verzosa, G., Zhu, Y., Schafer, M. J., Tchkonia, T., Kirkland, J. L., & Miller, J. D. (2016). Chronic senolytic treatment alleviates established vasomotor dysfunction in aged or atherosclerotic mice. Aging Cell, 15(5), 973-977. https://doi.org/10.1111/acel.12458