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Chen Y, Dong S, Tian L, Chen H, Chen J, He C. Combination of azithromycin and methylprednisolone alleviates Mycoplasma pneumoniae induced pneumonia by regulating miR‑499a‑5p/STAT3 axis. Exp Ther Med 2022; 24:578. [PMID: 35949317 PMCID: PMC9353499 DOI: 10.3892/etm.2022.11515] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Accepted: 06/10/2022] [Indexed: 11/06/2022] Open
Abstract
Mycoplasma pneumoniae (M. pneumoniae) is a contributing factor to community-acquired pneumonia in children. The present study sought to explain the underlying mechanism of azithromycin (AZM) combined with methylprednisolone (MP) in the treatment of M. pneumoniae infection. Peripheral blood samples were obtained from patients with M. pneumoniae and healthy volunteers for analysis. A549 cells were infected with M. pneumoniae to construct an in vitro cell model with M. pneumoniae, followed by treatment with AZM and MP. Cell Counting Kit-8 and TUNEL assays were conducted to detect cell viability and apoptosis. RT-qPCR was employed to measure the expression levels of microRNA (miR)-499a-5p and STAT3. Western blotting was performed to measure the expression of STAT3 and apoptosis-related proteins. Luciferase report assay was performed to verify the binding site between miR-499a-5p and STAT3. The production of inflammatory cytokines was determined using ELISA kits. The results exhibited the downregulated miR-499a-5p and dysregulated inflammatory cytokines in peripheral blood of patients and M. pneumoniae-infected A549 cells. AZM and MP treatment alone or combined significantly inhibited inflammatory response, cell viability loss and promoted apoptosis in A549 cells infected with M. pneumoniae, which was partly reversed by inhibition of miR-499a-5p. Furthermore, miR-499a-5p could negatively regulate its direct target STAT3. In addition, STAT3 is also regulated by AZM and MP. Collectively, the present results suggested that combination treatment of AZM and MP could inhibit M. pneumoniae infection-induced inflammation, cell viability loss and promoted apoptosis partly by regulating miR-499a-5p/STAT3 axis.
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Affiliation(s)
- Yongli Chen
- Department of Paediatrics, Wuhan Fourth Hospital, Hankou, Wuhan, Hubei 430034, P.R. China
| | - Shanwu Dong
- Department of Paediatrics, Wuhan Fourth Hospital, Hankou, Wuhan, Hubei 430034, P.R. China
| | - Lin Tian
- Department of Paediatrics, Wuhan Fourth Hospital, Hankou, Wuhan, Hubei 430034, P.R. China
| | - Haishan Chen
- Department of Paediatrics, Wuhan Fourth Hospital, Hankou, Wuhan, Hubei 430034, P.R. China
| | - Jing Chen
- Department of Paediatrics, Wuhan Fourth Hospital, Hankou, Wuhan, Hubei 430034, P.R. China
| | - Chunzhi He
- Department of Paediatrics, Wuhan Fourth Hospital, Hankou, Wuhan, Hubei 430034, P.R. China
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Sun F, Cai H, Tan L, Qin D, Zhang J, Hua J, Fan X, Peng S. Placenta-Specific miR-125b Overexpression Leads to Increased Rates of Pregnancy Loss in Mice. Int J Mol Sci 2022; 23:ijms23020943. [PMID: 35055127 PMCID: PMC8779150 DOI: 10.3390/ijms23020943] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2021] [Revised: 01/09/2022] [Accepted: 01/11/2022] [Indexed: 02/01/2023] Open
Abstract
Pregnancy loss (PL) is one of the common complications that women can experience during pregnancy, with an occurrence rate of 1 to 5%. The potential causes of pregnancy loss are unclear, with no effective treatment modalities being available. It has been previously reported that the level of miR-125b was significantly increased in placentas of PL patients. However, the role of miR-125b in the development of PL still remains unknown. In the current study, an miR-125b placenta-specific over-expression model was constructed by lentiviral transfecting zona-free mouse embryos followed by embryo transfer. On gestation day 15, it was observed that the placenta was significantly smaller in the miR-125b placenta-specific overexpression group than the control group. Additionally, the abortion rate of the miR-125b placenta-specific overexpression group was markedly higher than in the control group. The blood vessel diameter was larger in the miR-125b-overexpressing specific placenta. In addition, miR-125b-overexpressing HTR8 and JEG3 cell lines were also generated to analyze the migration and invasion ability of trophoblasts. The results showed that miR-125b overexpression significantly suppressed the migration and invasion ability of HTR8 and JEG3 cells. Overall, our results demonstrated that miR-125b can affect embryo implantation through modulating placenta angiogenesis and trophoblast cell invasion capacity that can lead to PL.
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Affiliation(s)
- Fen Sun
- Shaanxi Centre of Stem Cells Engineering & Technology, College of Veterinary Medicine, Northwest A&F University, Yangling, Xianyang 712100, China; (F.S.); (H.C.); (D.Q.); (J.H.)
| | - Hui Cai
- Shaanxi Centre of Stem Cells Engineering & Technology, College of Veterinary Medicine, Northwest A&F University, Yangling, Xianyang 712100, China; (F.S.); (H.C.); (D.Q.); (J.H.)
| | - Lunbo Tan
- Laboratory of Reproductive Health, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China;
| | - Dezhe Qin
- Shaanxi Centre of Stem Cells Engineering & Technology, College of Veterinary Medicine, Northwest A&F University, Yangling, Xianyang 712100, China; (F.S.); (H.C.); (D.Q.); (J.H.)
| | - Jian Zhang
- Center for Reproduction and Health Development, Institute of Biomedicine and Biotechnology, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China;
| | - Jinlian Hua
- Shaanxi Centre of Stem Cells Engineering & Technology, College of Veterinary Medicine, Northwest A&F University, Yangling, Xianyang 712100, China; (F.S.); (H.C.); (D.Q.); (J.H.)
| | - Xiujun Fan
- Center for Reproduction and Health Development, Institute of Biomedicine and Biotechnology, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China;
- Correspondence: (X.F.); (S.P.)
| | - Sha Peng
- Shaanxi Centre of Stem Cells Engineering & Technology, College of Veterinary Medicine, Northwest A&F University, Yangling, Xianyang 712100, China; (F.S.); (H.C.); (D.Q.); (J.H.)
- Correspondence: (X.F.); (S.P.)
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Wu Y, Zhao Z, Zhang H, Wang X, Tian XF, Wang Y, Qiu ZJ, Tang ZY, Huang M, Zhao Z. Isoxanthanol alleviates Staphylococcus aureus induced chronic obstructive pulmonary disease in rat model through promotion of miR-145-5p expression. Microb Pathog 2021; 155:104880. [PMID: 33905870 DOI: 10.1016/j.micpath.2021.104880] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 03/11/2021] [Accepted: 03/23/2021] [Indexed: 11/28/2022]
Abstract
The present study was aimed to evaluate the isoxanthanol against Staphylococcus aureus chronic obstructive pulmonary disease (COPD) in rat model. The isoxanthanol decreased the parasitic load by almost 99% in the Staphylococcus aureus infected rats. It significantly (P < 0.05) decreased mortality rate of the rats, prevented pulmonary tissue damage and aggregation of inflammatory cytokines. In Staphylococcus aureus infected rats, isoxanthanol treatment inhibited production of interleukin-18, interleukin-1β and TNF-α significantly (P < 0.05) in the BALF and pulmonary tissues. Treatment of the Staphylococcus aureus-infected rats with isoxanthanol inhibited up-regulation of NLRP3, ASC and caspase-1 expression. In Staphylococcus aureus-infected rats the expression of miR-145-5p was remarkably increased on treatment with isoxanthanol. In summary, isoxanthanol prevents Staphylococcus aureus-induced COPD in rats through up-regulation of miR-145-5p and suppression of inflammatory cytokines. Therefore, isoxanthanol can be of therapeutic importance for the treatment of Staphylococcus aureus induced COPD.
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Affiliation(s)
- Yihong Wu
- Department of General Practice, Pingjiang Xincheng Community Health Service Center, Sujin Street, Gusu District, Suzhou, 215000, China
| | - Zongquan Zhao
- Department of General Practice, Pingjiang New Town Community Health Service Center, Sujin Street, Gusu District, Suzhou, 215000, China
| | - Hao Zhang
- Department of General Practice, Pingjiang New Town Community Health Service Center, Sujin Street, Gusu District, Suzhou, 215000, China
| | - Xiaohong Wang
- Department of General Practice, Pingjiang New Town Community Health Service Center, Sujin Street, Gusu District, Suzhou, 215000, China
| | - Xiang Fan Tian
- Department of General Practice, Pingjiang New Town Community Health Service Center, Sujin Street, Gusu District, Suzhou, 215000, China
| | - Yijing Wang
- Community Health Management Center, Suzhou Municipal Hospital, Suzhou, 215000, China
| | - Zhen Juan Qiu
- Department of Nursing, Pingjiang New Town Community Health Service Center, Sujin Street, Gusu District, Suzhou, 215000, China
| | - Zhen Yuan Tang
- Community Health Management Center, Suzhou Municipal Hospital, Suzhou, 215000, China
| | - Min Huang
- Department of General Practice, Suzhou Municipal Hospital, Suzhou, 215000, China.
| | - Zongquan Zhao
- Department of General Practice, Pingjiang New Town Community Health Service Center, Sujin Street, Gusu District, Suzhou, 215000, China.
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Shi S, Liu X, Li H. Downregulation of caspase‑3 alleviates Mycoplasma pneumoniae‑induced apoptosis in alveolar epithelial cells. Mol Med Rep 2017; 16:9601-9606. [PMID: 29039549 DOI: 10.3892/mmr.2017.7782] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Accepted: 09/05/2017] [Indexed: 11/06/2022] Open
Abstract
Mycoplasma pneumoniae (M. pneumoniae) infection is closely associated with pneumonia in children. Apoptosis of alveolar epithelial cells is involved in the development of pneumonia in children. The present study aimed to examine how caspase‑3 influences apoptosis rates in M. pneumoniae‑infected alveolar epithelial cells. A549 alveolar epithelial cells were treated with M. pneumoniae, and cells and culture supernatant were collected at different time points. Alterations in apoptosis rates and caspase‑3 mRNA and protein levels were measured for each treatment group. Cell apoptosis was detected using flow cytometry and TUNEL assay, and cell proliferation was detected using Cell Counting Kit‑8 assay. Caspase‑3 expression in A549 cells was inhibited via small interfering RNA (siRNA) knockdown and relative alterations in mRNA and protein levels and apoptosis rates were measured. Cytokine levels were measured using ELISA assay. Apoptosis rates of alveolar epithelial cells increased with prolonged exposure to M. pneumoniae (P<0.05). M. pneumoniae infection increased interleukin (IL)‑4, IL‑6 and IL‑13 levels and reduced IL‑10 levels. Caspase‑3 was upregulated, whereas B cell lymphoma (Bcl)‑2 was downregulated upon M. pneumoniae exposure for 24 h (P<0.05). Following 12 and 24 h of treatment, caspase‑3 levels in the siRNA‑treated cells were decreased compared with control group (P<0.05). M. pneumoniae also significantly altered caspase‑3 and Bcl‑2 protein expression. M. pneumoniae promoted apoptosis in alveolar epithelial cells via activation of the external death receptor pathway. Therefore, M. pneumoniae infection may affect the development of pneumonia in children by regulating caspase‑3 expression and promoting apoptosis.
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Affiliation(s)
- Shan Shi
- Department of Pediatrics, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
| | - Xiaolei Liu
- Department of Pediatrics, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
| | - Haibo Li
- Department of Pediatrics, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
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