TY - JOUR
T1 - Cathepsin K Deficiency Prevents the Aggravated Vascular Remodeling Response to Flow Cessation in ApoE-/- Mice
AU - Donners, Marjo M. P. C.
AU - Bai, Lili
AU - Lutgens, Suzanne P. M.
AU - Wijnands, Erwin
AU - Johnson, Jason
AU - Schurgers, Leon J.
AU - Liu, Cong-Lin
AU - Daemen, Mat J. A. P.
AU - Cleutjens, Kitty B. J. M.
AU - Shi, Guo-Ping
AU - Biessen, Erik A. L.
AU - Heeneman, Sylvia
PY - 2016
Y1 - 2016
N2 - Cathepsin K (catK) is a potent lysosomal cysteine protease involved in extracellular matrix (ECM) degradation and inflammatory remodeling responses. Here we have investigated the contribution of catK deficiency on carotid arterial remodeling in response to flow cessation in apoE-/- and wild type (wt) background. Ligation-induced hyperplasia is considerably aggravated in apoE-/- versus wt mice. CatK protein expression was significantly increased in neointimal lesions of apoE-/- compared with wt mice, suggesting a role for catK in intimal hyperplasia under hyperlipidemic conditions. Surprisingly, CatK deficiency completely blunted the augmented hyperplastic response to flow cessation in apoE-/-, whereas vascular remodeling in wt mice was unaffected. As catK deficiency did neither alter lesion collagen content and elastic laminae fragmentation in vivo, we focused on effects of catK on (systemic) inflammatory responses. CatK deficiency significantly reduced circulating CD3 T-cell numbers, but increased the regulatory T cell subset in apoE-/- but not wt mice. Moreover, catK deficiency changed CD11b+Ly6G-Ly6C high monocyte distribution in apoE-/- but not wt mice and tended to favour macrophage M2a polarization. In conclusion, catK deficiency almost completely blunted the increased vascular remodeling response of apoE-/- mice to flow cessation, possibly by correcting hyperlipidemia-associated pro-inflammatory effects on the peripheral immune response
AB - Cathepsin K (catK) is a potent lysosomal cysteine protease involved in extracellular matrix (ECM) degradation and inflammatory remodeling responses. Here we have investigated the contribution of catK deficiency on carotid arterial remodeling in response to flow cessation in apoE-/- and wild type (wt) background. Ligation-induced hyperplasia is considerably aggravated in apoE-/- versus wt mice. CatK protein expression was significantly increased in neointimal lesions of apoE-/- compared with wt mice, suggesting a role for catK in intimal hyperplasia under hyperlipidemic conditions. Surprisingly, CatK deficiency completely blunted the augmented hyperplastic response to flow cessation in apoE-/-, whereas vascular remodeling in wt mice was unaffected. As catK deficiency did neither alter lesion collagen content and elastic laminae fragmentation in vivo, we focused on effects of catK on (systemic) inflammatory responses. CatK deficiency significantly reduced circulating CD3 T-cell numbers, but increased the regulatory T cell subset in apoE-/- but not wt mice. Moreover, catK deficiency changed CD11b+Ly6G-Ly6C high monocyte distribution in apoE-/- but not wt mice and tended to favour macrophage M2a polarization. In conclusion, catK deficiency almost completely blunted the increased vascular remodeling response of apoE-/- mice to flow cessation, possibly by correcting hyperlipidemia-associated pro-inflammatory effects on the peripheral immune response
U2 - https://doi.org/10.1371/journal.pone.0162595
DO - https://doi.org/10.1371/journal.pone.0162595
M3 - Article
C2 - 27636705
SN - 1932-6203
VL - 11
SP - e0162595
JO - PLOS ONE
JF - PLOS ONE
IS - 9
ER -