BMAL1-Downregulation Aggravates Porphyromonas Gingivalis-Induced Atherosclerosis by Encouraging Oxidative Stress

RATIONALE: Atherosclerotic cardiovascular diseases are the leading cause of mortality worldwide. Atherosclerotic cardiovascular diseases are considered as chronic inflammation processes. In addition to risk factors associated with the cardiovascular system itself, pathogenic bacteria such as the periodontitis-associated Porphyromonas gingivalis (P gingivalis) are also closely correlated with the development of atherosclerosis, but the underlying mechanisms are still elusive.

OBJECTIVE: To elucidate the mechanisms of P gingivalis-accelerated atherosclerosis and explore novel therapeutic strategies of atherosclerotic cardiovascular diseases.

METHODS AND RESULTS: Bmal1-/- (brain and muscle Arnt-like protein 1) mice, ApoE-/- mice, Bmal1-/-ApoE-/- mice, conditional endothelial cell Bmal1 knockout mice (Bmal1fl/fl; Tek-Cre mice), and the corresponding jet-legged mouse model were used. Pgingivalis accelerates atherosclerosis progression by triggering arterial oxidative stress and inflammatory responses in ApoE-/- mice, accompanied by the perturbed circadian clock. Circadian clock disruption boosts P gingivalis-induced atherosclerosis progression. The mechanistic dissection shows that P gingivalis infection activates the TLRs-NF-κB signaling axis, which subsequently recruits DNMT-1 to methylate the BMAL1 promoter and thus suppresses BMAL1 transcription. The downregulation of BMAL1 releases CLOCK, which phosphorylates p65 and further enhances NF-κB signaling, elevating oxidative stress and inflammatory response in human aortic endothelial cells. Besides, the mouse model exhibits that joint administration of metronidazole and melatonin serves as an effective strategy for treating atherosclerotic cardiovascular diseases.

CONCLUSIONS: P gingivalis accelerates atherosclerosis via the NF-κB-BMAL1-NF-κB signaling loop. Melatonin and metronidazole are promising auxiliary medications toward atherosclerotic cardiovascular diseases.

Medienart:

E-Artikel

Erscheinungsjahr:

2020

Erschienen:

2020

Enthalten in:

Zur Gesamtaufnahme - volume:126

Enthalten in:

Circulation research - 126(2020), 6 vom: 13. März, Seite e15-e29

Sprache:

Englisch

Beteiligte Personen:

Xie, Mengru [VerfasserIn]
Tang, Qingming [VerfasserIn]
Nie, Jiaming [VerfasserIn]
Zhang, Chao [VerfasserIn]
Zhou, Xin [VerfasserIn]
Yu, Shaoling [VerfasserIn]
Sun, Jiwei [VerfasserIn]
Cheng, Xiang [VerfasserIn]
Dong, Nianguo [VerfasserIn]
Hu, Yu [VerfasserIn]
Chen, Lili [VerfasserIn]

Links:

Volltext

Themen:

140QMO216E
ARNTL Transcription Factors
Anti-Bacterial Agents
Antioxidants
Apoe protein, mouse
Apolipoproteins E
Atherosclerosis
Bmal1 protein, mouse
CLOCK Proteins
Circadian rhythm
Clock protein, mouse
DNA (Cytosine-5-)-Methyltransferase 1
Dnmt1 protein, mouse
EC 2.1.1.37
EC 2.3.1.48
JL5DK93RCL
Journal Article
Melatonin
Metronidazole
NF-kappa B
NF-kappa B signaling
Oxidative stress
Porphyromonas gingivalis
Research Support, Non-U.S. Gov't
Toll-Like Receptors

Anmerkungen:

Date Completed 30.10.2020

Date Revised 13.12.2023

published: Print-Electronic

Citation Status MEDLINE

doi:

10.1161/CIRCRESAHA.119.315502

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM306723069