Self-delivering mRNA inhibitors of MK2 improve outcomes after spinal cord injury

Functional recovery and tissue damage after spinal cord injury (SCI) are influenced by secondary damage mechanisms, including inflammation. The inflammatory response after SCI relies on a variety of cell types with both protective and cytotoxic functions. The macrophage derived MAPK-activated protei...

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Veröffentlicht in:Journal of neuroimmunology 2023-06, Vol.379, p.578103-578103, Article 578103
Hauptverfasser: Page, Justin J., Almanza, Jose Rosas, Xiong, Shuana, Aishwarya, Veenu, Kroner, Antje
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container_title Journal of neuroimmunology
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creator Page, Justin J.
Almanza, Jose Rosas
Xiong, Shuana
Aishwarya, Veenu
Kroner, Antje
description Functional recovery and tissue damage after spinal cord injury (SCI) are influenced by secondary damage mechanisms, including inflammation. The inflammatory response after SCI relies on a variety of cell types with both protective and cytotoxic functions. The macrophage derived MAPK-activated protein kinase 2 has been described as a critical regulator of inflammation with detrimental function after SCI. Targeted modification of inflammatory effector molecules after SCI faces challenges of optimal timing, dosage and location of administration. Modified RNA inhibitors, FANA antisense oligonucleotides, are promising inhibitors due to their stability, local penetration of cells and high efficacy in targeted suppression. Here, we describe the use of anti- MAPK-activated protein kinase 2 FANA antisense oligonucleotides in a mouse model of contusional SCI. The most efficient inhibitor was selected with in vitro and in vivo techniques and then applied via intrathecal injections after SCI. This treatment resulted in improved gait applying DigiGait assessments and tissue preservation, indicating the usefulness of the target and inhibition approach. •MK2 is a critical regulator of inflammation with detrimental effect after SCI.•FANA ASO molecules are promising translational RNA inhibitors.•MK2 inhibition resulted in mild improvement of functional recovery after SCI.•MK2 inhibition led to better tissue preservation after SCI.
doi_str_mv 10.1016/j.jneuroim.2023.578103
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subjects Animals
Inflammation
Inflammation - metabolism
Macrophages - metabolism
Mice
MK2
mRNA inhibitors
Oligonucleotides, Antisense - metabolism
Oligonucleotides, Antisense - pharmacology
Oligonucleotides, Antisense - therapeutic use
Recovery of Function - physiology
RNA, Messenger
Spinal Cord - metabolism
Spinal Cord Injuries - drug therapy
Spinal Cord Injuries - metabolism
Spinal cord injury
title Self-delivering mRNA inhibitors of MK2 improve outcomes after spinal cord injury
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