SENP1 knockdown-mediated CTCF SUMOylation enhanced its stability and alleviated lipopolysaccharide-evoked inflammatory injury in human lung fibroblasts via regulation of FOXA2 transcription

Copyright © 2023 Elsevier B.V. All rights reserved..

BACKGROUND: Excessive inflammation is the main cause of treatment failure in neonatal pneumonia (NP). CCCTC-binding factor (CTCF) represents an important node in various inflammatory diseases. In the present study, we tried to clarify the function and underlying molecular mechanism of CTCF on an in vitro cellular model of NP, which was generated by simulating the human lung fibroblast cell line WI-38 with lipopolysaccharide (LPS).

METHODS: The SUMOylation level and protein interaction were verified by Co-immunoprecipitation assay. Cell viability was measured by Cell Counting Kit-8 assay. Inflammatory factors were examined by Enzyme-linked immunosorbent assay. Cell apoptosis was evaluated by TUNEL assay. The binding activity of CTCF to target promoter was tested by chromatin immunoprecipitation and luciferase reporter assay.

RESULTS: LPS treatment restrained cell viability, promoted the production of inflammatory factors, and enhanced cell apoptosis. CTCF overexpression played anti-inflammatory and anti-apoptotic roles. Furthermore, CTCF was modified by SUMOylation with small ubiquitin-like modifier protein 1 (SUMO1). Interfering with sumo-specific protease 1 (SENP1) facilitated CTCF SUMOylation and protein stability, thus suppressing LPS-evoked inflammatory and apoptotic injuries. Moreover, CTCF could bind to the forkhead box protein A2 (FOXA2) promoter region to promote FOXA2 expression. The anti-inflammatory and anti-apoptotic roles of CTCF are associated with FOXA2 activation. In addition, SENP1 knockdown increased FOXA2 expression by enhancing the abundance and binding ability of CTCF.

CONCLUSIONS: SUMOylation of CTCF by SENP1 knockdown enhanced its protein stability and binding ability and it further alleviated LPS-evoked inflammatory injury in human lung fibroblasts by positively regulating FOXA2 transcription.

Medienart:

E-Artikel

Erscheinungsjahr:

2024

Erschienen:

2024

Enthalten in:

Zur Gesamtaufnahme - volume:1868

Enthalten in:

Biochimica et biophysica acta. General subjects - 1868(2024), 1 vom: 31. Jan., Seite 130500

Sprache:

Englisch

Beteiligte Personen:

Kang, Le [VerfasserIn]
Wang, Xinhua [VerfasserIn]
Wang, Jianfang [VerfasserIn]
Guo, Jing [VerfasserIn]
Zhang, Wang [VerfasserIn]
Lei, Ruirui [VerfasserIn]

Links:

Volltext

Themen:

135845-92-0
Anti-Inflammatory Agents
CCCTC-Binding Factor
CTCF
Cysteine Endopeptidases
EC 3.4.-
EC 3.4.22.-
FOXA2
FOXA2 protein, human
Hepatocyte Nuclear Factor 3-beta
Inflammatory injury
Journal Article
Lipopolysaccharides
Neonatal pneumonia
Peptide Hydrolases
SENP1
SENP1 protein, human
SUMOylation

Anmerkungen:

Date Completed 16.12.2023

Date Revised 29.12.2023

published: Print-Electronic

Citation Status MEDLINE

doi:

10.1016/j.bbagen.2023.130500

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM364060387