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Jin Y, Guan Z, Wang X, Wang Z, Zeng R, Xu L, Cao P. ALA-PDT promotes HPV-positive cervical cancer cells apoptosis and DCs maturation via miR-34a regulated HMGB1 exosomes secretion. Photodiagnosis Photodyn Ther 2018; 24:27-35. [PMID: 30118903 DOI: 10.1016/j.pdpdt.2018.08.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Revised: 07/15/2018] [Accepted: 08/10/2018] [Indexed: 02/06/2023]
Abstract
5-Aminolevulinic acid photodynamic therapy(ALA-PDT) has been widely used for cervical cancer treatment, but the mechanisms are still not fully delineated. Here we showed that ALA-PDT significantly upregulated HMGB1 while downregulated miR-34a expression levels in cervical cancer tissues, and the percentages of mature DCs(mDCs) were increased in ALA-PDT treated patients' peripheral blood. After treating HPV-positive Hela, SiHa, Caski and HPV-negative C33 A cervical cancer cell lines with ALA-PDT, HPV-positive cells' proliferative ability was significantly inhibited and apoptosis rates were elevated, while no significant changes were found in HPV-negative C33 A cell line. Most importantly, in HPV-positive cells, we found that miR-34a were downregulated in cytoplasm, and both cytoplasm and exosome HMGB1 were significantly elevated comparing to cancer cells without ALA-PDT treatment, and it could be reversed by miR-34a mimic transfection, which indicated that HPV infection and miR-34a downregulation might be vital for ALA-PDT treatment. Based on the HMGB1 is the potential target of miR-34a and an inverse correlation between miR-34a and HMGB1 in ALA-PDT treated cancer tissues, we verified that HMGB1 could be targeted and downregulated by miR-34a mimic, and ALA-PDT promotes HMGB1 secretion by inhibiting miR-34a expression. By co-culturing cervical cancer cell lines with immature DCs(imDCs) in the Transwell systems, we found that ALA-PDT induced HMGB1 exosomes could promote DCs maturation, which could be reversed by silencing HMGB1 in HPV-positive cervical cancer cells. In vivo animal experiments also proved that ALA-PDT inhibited tumor growth in tumor bearing mice, which was reversed by co-transfected with miR-34a mimic or silencing HMGB1 in HPV-positive cells. Hence we concluded that ALA-PDT treatment specifically inhibited HPV-positive cervical cancer cells' proliferative ability, promoted cell apoptosis and modulated DCs maturation by regulating miR-34a mediated HMGB1 exosomes secretion.
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Affiliation(s)
- Yichao Jin
- Medical Faculty, Kunming University of Science and Technology, Kunming, Yunnan, China; Department of Dermatology, The First People's Hospital of Yunnan Province, Kunming, Yunnan, China; The Affiliated Hospital of Kunming University of Science and Technology, Kunming, Yunnan, China
| | - Zhen Guan
- Department of Dermatology, The First People's Hospital of Yunnan Province, Kunming, Yunnan, China; The Affiliated Hospital of Kunming University of Science and Technology, Kunming, Yunnan, China
| | - Xiaochuan Wang
- Department of Dermatology, The First People's Hospital of Yunnan Province, Kunming, Yunnan, China; The Affiliated Hospital of Kunming University of Science and Technology, Kunming, Yunnan, China
| | - Zhiqiong Wang
- Department of Dermatology, The First People's Hospital of Yunnan Province, Kunming, Yunnan, China; The Affiliated Hospital of Kunming University of Science and Technology, Kunming, Yunnan, China
| | - Rong Zeng
- Department of Medical Oncology, The First People's Hospital of Yunnan Province, Kunming, Yunnan, China; The Affiliated Hospital of Kunming University of Science and Technology, Kunming, Yunnan, China
| | - Liangheng Xu
- Department of Dermatology, The First People's Hospital of Yunnan Province, Kunming, Yunnan, China; The Affiliated Hospital of Kunming University of Science and Technology, Kunming, Yunnan, China
| | - Ping Cao
- Department of Dermatology, The First People's Hospital of Yunnan Province, Kunming, Yunnan, China; The Affiliated Hospital of Kunming University of Science and Technology, Kunming, Yunnan, China.
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