ArticleMedical microbiology and immunology2013
Essential role of JAK/STAT pathway in the induction of cell cycle arrest in macrophages infected with periodontopathic bacterium Aggregatibacter actinomycetemcomitans.
Article in Medical microbiology and immunology, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed, 10 citations in OpenAlex.
- sST2: A Bridge Between Sirt1/p53/p21 Signal-Induced Senescence and TGF-β1/Smad2/3 Regulation of Cardiac Fibrosis in Mouse Viral Myocarditis.Inflammation · 2023Article
- Autophagy impacts on oxaliplatin-induced hepatocarcinoma apoptosis via the IL-17/IL-17R-JAK2/STAT3 signaling pathway.Oncology letters · 2017Article
- Aggregatibacter actinomycetemcomitans, a potent immunoregulator of the periodontal host defense system and alveolar bone homeostasis.Molecular oral microbiology · 2016Review
- Aggregatibacter actinomycetemcomitans Invasion Induces Interleukin-1β Production Through Reactive Oxygen Species and Cathepsin B.Journal of interferon & cytokine research : the official journal of the International Society for Interferon and Cytokine Research · 2015Article
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Authors and funding
4 authors at 1 institution in 1 country.
Funding
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Abstract
In the present study, phosphorylation of signal transducers and activators of transcription 3 (STAT3) was found to be important in the induction of G1 cell cycle arrest in murine macrophages infected with Aggregatibacter actinomycetemcomitans. First, we focused on suppressor of cytokine signaling 3 (SOCS3) as a negative regulator of the JAK/STAT pathway. Flow cytometric analysis showed that A. actinomycetemcomitans infection eliminated G1 cell cycle arrest in SOCS3-overexpressing RAW 264.7 macrophage cells. Western blotting analysis demonstrated expression of cell cycle-associated protein p21 and hypophosphorylation of retinoblastoma protein (Rb) was decreased in SOCS3-overexpressing RAW 264.7 cells. AG490, a specific inhibitor of JAK2, inhibited the expression of p21 and degradation of cyclin D1 in A. actinomycetemcomitans-infected RAW 264.7 cells, resulting in suppression of STAT3 phosphorylation. These results indicated that constitutive SOCS3 expression and AG490 inhibited the expression of JAK2 and phosphorylation of STAT3, and prevented cell cycle arrest in A. actinomycetemcomitans-infected RAW 264.7 cells. These findings suggest that the JAK/STAT pathway plays crucial roles in the cell cycle regulation of macrophages infected with periodontopathic bacteria through the suppression of p21 expression and degradation of cyclin D1.
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