Interleukin-6 inhibition in ST-elevation myocardial infarction: Immune cell profile in the randomised ASSAIL-MI trial.
Antibodies, Monoclonal, Humanized
/ pharmacology
Humans
Interleukin-6
/ antagonists & inhibitors
Leukocytes
/ drug effects
Lymphocyte Count
Myocardium
Neutrophils
/ drug effects
Percutaneous Coronary Intervention
/ adverse effects
RNA
Randomized Controlled Trials as Topic
ST Elevation Myocardial Infarction
/ blood
T-Lymphocyte Subsets
/ drug effects
Treatment Outcome
Inflammation
Interleukin-6
Lymphocytes
Neutrophils
ST-elevation myocardial infarction
Tocilizumab
Journal
EBioMedicine
ISSN: 2352-3964
Titre abrégé: EBioMedicine
Pays: Netherlands
ID NLM: 101647039
Informations de publication
Date de publication:
Jun 2022
Jun 2022
Historique:
received:
07
12
2021
revised:
02
04
2022
accepted:
05
04
2022
pubmed:
4
5
2022
medline:
15
6
2022
entrez:
3
5
2022
Statut:
ppublish
Résumé
We recently showed that interleukin (IL)-6 inhibition by tocilizumab improves myocardial salvage in ST-elevation myocardial infarction (STEMI). However, the mechanisms for this effect are not clear. In this exploratory sub-study of the ASSAIL-MI trial, we examined leukocyte differential counts and their relation to myocardial salvage and peak troponin T (TnT) in STEMI patients randomised to tocilizumab (n = 101) or placebo (n = 98). We performed RNA-sequencing on whole blood (n = 40) and T cells (n = 20). B and T cell subpopulations were examined by flow cytometry (n = 69). (i) STEMI patients had higher neutrophil counts at hospitalisation compared with stable angina patients. (ii) After percutaneous coronary intervention there was a gradual decline in neutrophils, which was significantly more pronounced in the tocilizumab group. (iii) The decrease in neutrophils in the tocilizumab group was associated with improved myocardial salvage and lower peak TnT. (iv) RNA-sequencing suggested that neutrophil function was also attenuated by tocilizumab. (v) B and T cell sub-populations changed only minimally after STEMI with minor effects of tocilizumab, supported as well by RNA-sequencing analyses of T cells. (vi) However, a low CD8 Tocilizumab induced a rapid reduction in neutrophils and seemed to attenuate neutrophil function in STEMI patients potentially related to the beneficial effects of tocilizumab on myocardial salvage. South-Eastern Norway Regional Health Authority (Nos. 2019067, 2017084), the Central Norway Regional Health Authority and Norwegian Research Council (No. 283867).
Sections du résumé
BACKGROUND
BACKGROUND
We recently showed that interleukin (IL)-6 inhibition by tocilizumab improves myocardial salvage in ST-elevation myocardial infarction (STEMI). However, the mechanisms for this effect are not clear.
METHODS
METHODS
In this exploratory sub-study of the ASSAIL-MI trial, we examined leukocyte differential counts and their relation to myocardial salvage and peak troponin T (TnT) in STEMI patients randomised to tocilizumab (n = 101) or placebo (n = 98). We performed RNA-sequencing on whole blood (n = 40) and T cells (n = 20). B and T cell subpopulations were examined by flow cytometry (n = 69).
FINDINGS
RESULTS
(i) STEMI patients had higher neutrophil counts at hospitalisation compared with stable angina patients. (ii) After percutaneous coronary intervention there was a gradual decline in neutrophils, which was significantly more pronounced in the tocilizumab group. (iii) The decrease in neutrophils in the tocilizumab group was associated with improved myocardial salvage and lower peak TnT. (iv) RNA-sequencing suggested that neutrophil function was also attenuated by tocilizumab. (v) B and T cell sub-populations changed only minimally after STEMI with minor effects of tocilizumab, supported as well by RNA-sequencing analyses of T cells. (vi) However, a low CD8
INTERPRETATION
CONCLUSIONS
Tocilizumab induced a rapid reduction in neutrophils and seemed to attenuate neutrophil function in STEMI patients potentially related to the beneficial effects of tocilizumab on myocardial salvage.
FUNDING
BACKGROUND
South-Eastern Norway Regional Health Authority (Nos. 2019067, 2017084), the Central Norway Regional Health Authority and Norwegian Research Council (No. 283867).
Identifiants
pubmed: 35504178
pii: S2352-3964(22)00197-9
doi: 10.1016/j.ebiom.2022.104013
pmc: PMC9079006
pii:
doi:
Substances chimiques
Antibodies, Monoclonal, Humanized
0
Interleukin-6
0
RNA
63231-63-0
tocilizumab
I031V2H011
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
104013Informations de copyright
Copyright © 2022 The Authors. Published by Elsevier B.V. All rights reserved.
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