Authors:	Lagrange, Jeremy Finger, Stefanie Kossmann, Sabine Garlapati, Venkata Ruf, Wolfram Wenzel, Philip
Title:	Angiotensin II infusion leads to aortic dissection in LRP8 deficient mice
Online publication date:	11-Dec-2020
Year of first publication:	2020
Language:	english
Abstract:	Myeloid cells are crucial for the development of vascular inflammation. Low-density lipoprotein receptor-related protein 8 (LRP8) or Apolipoprotein E receptor 2 (ApoER2), is expressed by macrophages, endothelial cells and platelets and has been implicated in the development of cardiovascular diseases. Our aim was to evaluate the role of LRP8, in particular from immune cells, in the development of vascular inflammation. Methods. LRP8+/+ and LRP8−/− mice (on B6;129S background) were infused with angiotensin II (AngII, 1 mg/kg/day for 7 to 28 day) using osmotic minipumps. Blood pressure was recorded using tail cuff measurements. Vascular reactivity was assessed in isolated aortic segments. Leukocyte activation and infiltration were assessed by flow cytometry of aortic tissue and intravital videomicroscopy imaging. Histological analysis of aortic sections was conducted using sirius red staining. Results. AngII infusion worsened endothelial-dependent vascular relaxation and immune cells rolling and adherence to the carotid artery in both LRP8+/+ as well as LRP8−/− mice. However, only LRP8−/− mice demonstrated a drastically increased mortality rate in response to AngII due to aortic dissection. Bone marrow transplantation revealed that chimeras with LRP8 deficient myeloid cells phenocopied LRP8−/− mice. Conclusion. AngII-infused LRP8 deficient mice could be a useful animal model to study aortic dissection reflecting the lethality of this disease in humans. Keywords: low-density lipoprotein receptor-related protein 8 angiotensin II aortic dissection
DDC:	540 Chemie 540 Chemistry and allied sciences 570 Biowissenschaften 570 Life sciences 610 Medizin 610 Medical sciences
Institution:	Johannes Gutenberg-Universität Mainz
Department:	FB 04 Medizin
Place:	Mainz
ROR:	https://ror.org/023b0x485
DOI:	http://doi.org/10.25358/openscience-5492
Version:	Published version
Publication type:	Zeitschriftenaufsatz
Document type specification:	Scientific article
License:	CC BY
Information on rights of use:	https://creativecommons.org/licenses/by/4.0/
Journal:	International journal of molecular sciences 21 14
Pages or article number:	4916
Publisher:	MDPI
Publisher place:	Basel
Issue date:	2020
ISSN:	1422-0067
Publisher URL:	https://doi.org/10.3390/ijms21144916
Publisher DOI:	10.3390/ijms21144916
Appears in collections:	JGU-Publikationen