Platelet-rich plasma-derived extracellular vesicles inhibit NF-κB/NLRP3 pathway-mediated pyroptosis in intervertebral disc degeneration via the MALAT1/microRNA-217/SIRT1 axis

Copyright © 2024 Elsevier Inc. All rights reserved..

BACKGROUND: Intervertebral disc degeneration (IDD) is a main contributor to lower back pain, and compression stress-induced apoptosis of nucleus pulposus (NP) cells and extracellular matrix (ECM) degradation has been implicated in the IDD progression. The functions of platelet-rich plasma (PRP)-derived extracellular vesicles (PRP-EVs) in regulating these biological processes remain unclear in IDD. Here, we aimed to investigate the key role of long noncoding RNA (lncRNA) MALAT1 incorporated in PRP-EVs in IDD.

METHODS: Tert-butyl hydroperoxide (TBHP)-induced damage in NP cells was treated with PRP-EVs extracted from healthy volunteers, followed by MTT, EdU, TUNEL, and Western blot assays. IDD mice were also treated with PRP-EVs. Histomorphological and pathological changes were evaluated. The pyroptosis of cells and the degradation of ECM were detected by ELISA and immunohistochemistry. We screened the differentially expressed lncRNAs in NP cells after PRP-EVs treatment by microarray analysis. The downstream targets of MALAT1 in NP cells were predicted and validated by rescue experiments.

FINDINGS: TBHP induction reduced cell proliferation and exacerbated pyroptosis and ECM degradation, and PRP-EVs inhibited TBHP-induced cell damage. PRP-EVs-treated mice with IDD had reduced Thompson scores, increased NP tissue content, and restored ECM. PRP-EVs upregulated MALAT1 expression in vivo and in vitro, whereas MALAT1 downregulation exacerbated NP cell pyroptosis and ECM degradation. MALAT1 upregulated SIRT1 expression by downregulating microRNA (miR)-217 in NP cells. SIRT1 blocked the NF-κB/NLRP3 pathway-mediated pyroptosis, thereby alleviating IDD.

INTERPRETATION: PRP-EVs deliver MALAT1 to regulate miR-217/SIRT1, thereby controlling NP cell pyroptosis in IDD.

Medienart:

E-Artikel

Erscheinungsjahr:

2024

Erschienen:

2024

Enthalten in:

Zur Gesamtaufnahme - volume:117

Enthalten in:

Cellular signalling - 117(2024) vom: 17. März, Seite 111106

Sprache:

Englisch

Beteiligte Personen:

Tao, Xueqiang [VerfasserIn]
Xue, Fen [VerfasserIn]
Xu, Jiayuan [VerfasserIn]
Wang, Wenbo [VerfasserIn]

Links:

Volltext

Themen:

EC 3.5.1.-
Intervertebral disc degeneration
Journal Article
MALAT1
MIRN-217 microRNA, mouse
MIRN217 microRNA, human
MicroRNAs
NF-kappa B
NLR Family, Pyrin Domain-Containing 3 Protein
Nucleus pulposus
Platelet-rich plasma-derived extracellular vesicles
Pyroptosis
RNA, Long Noncoding
Research Support, Non-U.S. Gov't
SIRT1 protein, human
Sirtuin 1

Anmerkungen:

Date Completed 11.03.2024

Date Revised 22.03.2024

published: Print-Electronic

Citation Status MEDLINE

doi:

10.1016/j.cellsig.2024.111106

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM368637344