Re: ESC 2021 August 27-30
in response to
by
posted on
Aug 03, 2021 04:16PM
NLRP3 downregulation by apabetalone reference, page 14:
Apologies for the formating of the text I copy/pasted
My boldings
https://clinicalepigeneticsjournal.biomedcentral.com/articles/10.1186/s13148-020-00943-0
Upon stimulation with cytokines and PRR agonists,
monocytes and macrophages activate the infammasome
pathway, which is responsible for the production of the mature secreted form of IL-1β, a major pro-atherosclerotic cytokine [50]. IFNγ contributes to high IL1B gene
expression only when combined with secondary stimuli
[80]. Consistent with published data [80], IFNγ did not
change the IL1B transcript abundance as a single agent
(data not shown), but it enhanced the IL-1β protein
secretion by 2.7-fold in DM2+CVD monocytes (Fig. 6).
This induction was countered by apabetalone treatment
(84% reduction). IL-1β is synthesized by monocytes in
its inactive form (pro-IL-1β), which is then converted
into its active mature form by the NLRP3 infammasome-associated caspase 1 protease (encoded by CASP1
gene) [50]. Apabetalone (25 μM) downregulated CASP1
gene transcription in DM2+CVD monocytes in nonstimulated (Table 2) and stimulated (Table 3) conditions,
potentially explaining the observed decrease in IL-1β.
The severity of atherosclerosis correlates with infammasome activity and NLRP3/caspase 1-mediated generation
of IL-1β and IL-1α in human atherosclerotic plaque [81].
Interestingly, the anti-IL-1β monoclonal antibody canakinumab reduced the risk of MACE for CVD patients by
15% in 3.7 years, independently of lipid lowering [82].
This proof-of-concept study demonstrated that countering infammasome-mediated infammation signifcantly reduces residual CVD risk, promoting the development of new anti-infammatory therapeutic agents.