Abstract |
CD44 partcipates in multiple inflammatory reactions. Here, we aimed to investigate the role of CD44 and the ligand, hyaluronan (HA), on chronic prostatitis/chronic pelvic pain syndrome (CP/CPPS) pathogenesis. We found that CD44 was universally expressed in CD4+ lymphocytes in the peripheral blood of CP/CPPS patients. After silencing CD44 expression or delivering 4-methylumbelliferone (4-MU), the pain severity and prostatic inflammation were significantly relieved. In vitro assay found that HA/CD44 was able to regulate T helper 1 (Th1) cells differentiation, the deficiency of which diminished experimental autoimmune prostatitis (EAP) susceptibility. Bioinformatic analysis suggested that after HA or 4-MU treatment, mTOR signaling was significantly altered, and these results were confirmed by subsequent Western blotting assay. Besides, mass spectrometry and co-immunoprecipitation assays found that CD44 was able to interact with Annexin A1 (ANX A1), and this kind of interaction stabilized ANX A1 protein and maintained the activation of Akt/mTOR pathway. Meanwhile, HA-treatment-enhanced prostatic inflammation, Th1 cell differentiation, and Akt/mTOR pathway activation were reversed after silencing the expression of ANX A1 using shANX A1-lentivirus. The present study systematically investigates the functional role of HA/CD44 in CP/CPPS and identifies novel mechanisms for HA/CD44 promoting Th1 cell differentiation. Targeting the HA/CD44/ANX A1/Akt/mTOR signaling represents novel potential therapeutic strategies for patients with CP/CPPS.
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Authors | Jing Chen, Jialin Meng, Xiaoling Li, Xiao Li, Yi Liu, Chen Jin, Li Zhang, Zongyao Hao, Xianguo Chen, Meng Zhang, Chaozhao Liang |
Journal | Frontiers in immunology
(Front Immunol)
Vol. 13
Pg. 875412
( 2022)
ISSN: 1664-3224 [Electronic] Switzerland |
PMID | 35693826
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Copyright | Copyright © 2022 Chen, Meng, Li, Li, Liu, Jin, Zhang, Hao, Chen, Zhang and Liang. |
Chemical References |
- Annexin A1
- CD44 protein, human
- Hyaluronan Receptors
- Hyaluronic Acid
- MTOR protein, human
- Proto-Oncogene Proteins c-akt
- TOR Serine-Threonine Kinases
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Topics |
- Annexin A1
(genetics, metabolism)
- Chronic Pain
- Humans
- Hyaluronan Receptors
(genetics, metabolism)
- Hyaluronic Acid
- Inflammation
- Male
- Pelvic Pain
(metabolism, pathology)
- Prostatitis
(drug therapy)
- Proto-Oncogene Proteins c-akt
(metabolism)
- TOR Serine-Threonine Kinases
(metabolism)
- Th1 Cells
(metabolism)
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