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Wang M, Wang Z, Lessing DJ, Guo M, Chu W. Fusobacterium nucleatum and its metabolite hydrogen sulfide alter gut microbiota composition and autophagy process and promote colorectal cancer progression. Microbiol Spectr 2023; 11:e0229223. [PMID: 37889013 PMCID: PMC10714730 DOI: 10.1128/spectrum.02292-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Accepted: 09/19/2023] [Indexed: 10/28/2023] Open
Abstract
IMPORTANCE Colorectal cancer (CRC) is the second most common cancer in the world; the main treatment for CRC is immunosuppressive therapy, but this therapy is only effective for a small percentage of CRC patients, so there is an urgent need for a treatment with fewer side effects and higher efficacy. This study demonstrated that Fusobacterium nucleatum with increased abundance in CRC can regulate the autophagy process and disrupt normal intestinal microbiota by producing hydrogen sulfide, factors that may be involved in the development and progression of CRC. This study may provide a reference for future CRC treatment options that are efficient and have fewer side effects.
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Affiliation(s)
- Minyu Wang
- Department of Pharmaceutical Microbiology, School of Life Science and Technology, China Pharmaceutical University, Nanjing, China
| | - Zheng Wang
- Department of Pharmaceutical Microbiology, School of Life Science and Technology, China Pharmaceutical University, Nanjing, China
| | - Duncan James Lessing
- Department of Pharmaceutical Microbiology, School of Life Science and Technology, China Pharmaceutical University, Nanjing, China
| | - Min Guo
- Department of Pharmaceutical Microbiology, School of Life Science and Technology, China Pharmaceutical University, Nanjing, China
| | - Weihua Chu
- Department of Pharmaceutical Microbiology, School of Life Science and Technology, China Pharmaceutical University, Nanjing, China
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, China
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Qi Y, Hu M, Han C, Wang J, Chen F, Guo H, She Y, Zhang M, Zhang J, Zhao Z, Xie H, Wang S, Chen M, Wang J, Zeng D. ARHGAP4 promotes leukemogenesis in acute myeloid leukemia by inhibiting DRAM1 signaling. Oncogene 2023; 42:2547-2557. [PMID: 37443303 DOI: 10.1038/s41388-023-02770-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 06/22/2023] [Accepted: 06/27/2023] [Indexed: 07/15/2023]
Abstract
Rho GTPase-activating protein 4 (ARHGAP4) is an important Rho family GTPase-activating protein that is strongly associated with the onset and progression of some tumors. We found that ARHGAP4 mRNA and protein are overexpressed in human acute myeloid leukemia (AML) patients and are associated with a poor prognosis. ARHGAP4 knockdown significantly impairs viability and colony formation capacity and induces apoptosis in AML cells. Further results demonstrate that ARHGAP4 deletion impairs AML progression in vivo. Interestingly, DRAM1 signaling is significantly activated in AML cells with ARHGAP4 knockdown. Our results also indicated that ARHGAP4 might function in AML cells by binding with p53 to inhibit DRAM1. Moreover, knockdown of DRAM1 rescues the defects of ARHGAP4 in AML cells. This newly described role of the ARHGAP4/DRAM1 axis in regulating AML progression may have important therapeutic implications.
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Affiliation(s)
- Yan Qi
- Department of Hematology, Daping Hospital, Third Military Medical University, No. 10 Changjiang Branch Road, Yuzhong District, Chongqing, 400042, China
| | - Mengjia Hu
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Combined Injury, Chongqing Engineering Research Center for Nanomedicine, College of Preventive Medicine, Third Military Medical University, Gaotanyan Street 30, Chongqing, 400038, China
| | - Changhao Han
- Department of Hematology, Daping Hospital, Third Military Medical University, No. 10 Changjiang Branch Road, Yuzhong District, Chongqing, 400042, China
| | - Jin Wang
- Department of Hematology, Daping Hospital, Third Military Medical University, No. 10 Changjiang Branch Road, Yuzhong District, Chongqing, 400042, China
| | - Fang Chen
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Combined Injury, Chongqing Engineering Research Center for Nanomedicine, College of Preventive Medicine, Third Military Medical University, Gaotanyan Street 30, Chongqing, 400038, China
| | - Hui Guo
- Key Laboratory of Infection and Immunity of CAS, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China
| | - Yuanting She
- Department of Hematology, Daping Hospital, Third Military Medical University, No. 10 Changjiang Branch Road, Yuzhong District, Chongqing, 400042, China
| | - Meijuan Zhang
- Department of Hematology, Daping Hospital, Third Military Medical University, No. 10 Changjiang Branch Road, Yuzhong District, Chongqing, 400042, China
| | - Jing Zhang
- Department of Hematology, Daping Hospital, Third Military Medical University, No. 10 Changjiang Branch Road, Yuzhong District, Chongqing, 400042, China
| | - Zhongyue Zhao
- Department of Hematology, Daping Hospital, Third Military Medical University, No. 10 Changjiang Branch Road, Yuzhong District, Chongqing, 400042, China
| | - Huan Xie
- Department of Hematology, Daping Hospital, Third Military Medical University, No. 10 Changjiang Branch Road, Yuzhong District, Chongqing, 400042, China
| | - Song Wang
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Combined Injury, Chongqing Engineering Research Center for Nanomedicine, College of Preventive Medicine, Third Military Medical University, Gaotanyan Street 30, Chongqing, 400038, China
| | - Mo Chen
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Combined Injury, Chongqing Engineering Research Center for Nanomedicine, College of Preventive Medicine, Third Military Medical University, Gaotanyan Street 30, Chongqing, 400038, China
| | - Junping Wang
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Combined Injury, Chongqing Engineering Research Center for Nanomedicine, College of Preventive Medicine, Third Military Medical University, Gaotanyan Street 30, Chongqing, 400038, China.
| | - Dongfeng Zeng
- Department of Hematology, Daping Hospital, Third Military Medical University, No. 10 Changjiang Branch Road, Yuzhong District, Chongqing, 400042, China.
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Chen W, Ma L, Shao J, Bi C, Li J, Yang W. miR-185-5p / ATG101 axis alleviated intestinal barrier damage in intestinal ischemia reperfusion through autophagy. Heliyon 2023; 9:e18325. [PMID: 37539299 PMCID: PMC10395547 DOI: 10.1016/j.heliyon.2023.e18325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 07/12/2023] [Accepted: 07/13/2023] [Indexed: 08/05/2023] Open
Abstract
Objective Intestinal ischemia-reperfusion (II/R) is a common pathological injury in clinic, and the systemic inflammatory response it causes will lead to multiple organ damage and functional failure. miR-185-5p has been reported to be a regulator of inflammatory response and autophagy, but whether it participates in the regulation of autophagy in II/R is still unclear. Therefore, we aimed to explore the mechanism of miR-185-5p regulating intestinal barrier injury in (II/R). Methods Caco-2 cells was induced by oxygen-glucose deprivation/reoxygenation (OGD/R) to establish II/R model. The superior mesenteric artery of C57BL/6 mice was clamped for 45 min and then subjected to reperfusion for 4 h for the establishment of II/R mice model. miR-185-5p mimic, miR-185-5p inhibitor, pcDNA-autophagy-related 101 (ATG101) were respectively transfected into Caco-2 cells. Real-time quantitative polymerase chain reaction (RT-qPCR) was performed to assess miR-185-5p expression. Western blot detected the level of ATG101 and tight junction-associated proteins ZO1, Occludin, E-cadherin, β-catenin, as well as autophagy markers ATG5, ATG12, LC3Ⅰ/Ⅱ, Beclin1 and SQSTM1. Transepithelial electrical resistance (TEER) values was detected by a resistance meter. FITC-Dextran was performed to measure cell permeability. 5-ethynyl-2'-deoxyuridine (EDU) staining measured cell proliferation. Transmission electron microscope was conducted to observe autophagosomes. Hematoxylin & eosin (H&E) staining observed the damage of mice intestinal. Immunohistochemistry (IHC) measured the percentage of ki67 positive cells. TdT-mediated dUTP nick-end labeling (TUNEL) assay assessed cell apoptosis in intestinal tissues of II/R. Dual-luciferase assay verified the targeting relationship between miR-185-5p and ATG101.Results miR-185-5p was overexpressed in OGD/R-induced Caco-2 cells and intestinal tissues of II/R mice. Knocking down miR-185-5p markedly promoted autophagy and TEER values, reduced cell permeability, and alleviated intestinal barrier damage. ATG101 was a target of miR-185-5p, and overexpression of ATG101 promoted autophagy and dampened OGD/R-induced intestinal barrier damage. Overexpression of miR-185-5p reversed the effect of overexpressed ATG101 on OGD/R-induced Caco-2 cells. Conclusion Knockdown of miR-185-5p enhanced autophagy and alleviated II/R intestinal barrier damage by targeting ATG101.
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Affiliation(s)
| | | | | | | | | | - Wei Yang
- Corresponding author. Department of Anesthesiology, The first affiliated hospital of Kunming medical University, No.295 Xichang Rd, Kunming 650032, Yunnan Province, China
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Lin Y, Xia P, Cao F, Zhang C, Yang Y, Jiang H, Lin H, Liu H, Liu R, Liu X, Cai J. Protective effects of activated vitamin D receptor on radiation-induced intestinal injury. J Cell Mol Med 2022; 27:246-258. [PMID: 36579449 PMCID: PMC9843524 DOI: 10.1111/jcmm.17645] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2022] [Revised: 11/10/2022] [Accepted: 11/16/2022] [Indexed: 12/30/2022] Open
Abstract
Radiation-induced intestinal injury (RIII) is a common complication after radiation therapy in patients with pelvic, abdominal, or retroperitoneal tumours. Recently, in the model of DSS (Dextran Sulfate Sodium Salt) -induced intestinal inflammatory injury, it has been found in the study that transgenic mice expressing hVDR in IEC (Intestinal Epithelial Cell) manifest highly anti-injury properties in colitis, suggesting that activated VDR in the epithelial cells of intestine may inhibit colitis by protecting the mucosal epithelial barrier. In this study, we investigated the effect of the expression and regulation of VDR on the protection of RIII, and the radiosensitivity in vitro experiments, and explored the initial mechanism of VDR in regulating radiosensitivity of IEC. As a result, we found that the expression of VDR in intestinal tissues and cells in mice can be induced by ionizing radiation. VDR agonists are able to prolong the average survival time of mice after radiation and reduce the radiation-induced intestinal injury. For lack of vitamin D, the radiosensitivity of intestinal epithelial cells in mice increased, which can be reduced by VDR activation. Ensuing VDR activation, the radiation-induced intestinal stem cells damage is decreased, and the regeneration and differentiation of intestinal stem cells is promoted as well. Finally, on the basis of sequencing analysis, we validated and found that VDR may target the HIF/PDK1 pathway to mitigate RIII. We concluded that agonism or upregulation of VDR expression attenuates radiation-induced intestinal damage in mice and promotes the repair of epithelial damage in intestinal stem cells.
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Affiliation(s)
- Yuhan Lin
- School of Public Health and ManagementWenzhou Medical UniversityZhejiangChina
| | - Penglin Xia
- Department of Radiation Medicine, Faculty of Naval MedicineNaval Military Medical UniversityShanghaiChina
| | - Fangyu Cao
- Incubation Base for Undergraduates' Innovative Practice in Department of Radiation Medicine, Faculty of Naval MedicineNaval Military Medical UniversityShanghaiChina
| | - Cheng Zhang
- School of Public Health and ManagementWenzhou Medical UniversityZhejiangChina
| | - Yajie Yang
- Incubation Base for Undergraduates' Innovative Practice in Department of Radiation Medicine, Faculty of Naval MedicineNaval Military Medical UniversityShanghaiChina
| | - Haitao Jiang
- Department of Oral and maxillofacial Trauma and Orthognathic SurgeryStomatological Hospital of Zunyi Medical UniversityZunyiChina
| | - Haishan Lin
- Cancer Centre, Beijing Friendship HospitalCapital Medical UniversityBeijingChina
| | - Hu Liu
- Department of Radiation Medicine, Faculty of Naval MedicineNaval Military Medical UniversityShanghaiChina
| | - Ruling Liu
- Department of Radiation Medicine, Faculty of Naval MedicineNaval Military Medical UniversityShanghaiChina
| | - Xiaodong Liu
- School of Public Health and ManagementWenzhou Medical UniversityZhejiangChina
| | - Jianming Cai
- School of Public Health and ManagementWenzhou Medical UniversityZhejiangChina,Department of Radiation Medicine, Faculty of Naval MedicineNaval Military Medical UniversityShanghaiChina
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Zhang Y, Yao E, Liu Y, Zhang Y, Ding M, Liu J, Chen X, Fan S. FUT2 Facilitates Autophagy and Suppresses Apoptosis via p53 and JNK Signaling in Lung Adenocarcinoma Cells. Cells 2022; 11:cells11244031. [PMID: 36552800 PMCID: PMC9776918 DOI: 10.3390/cells11244031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 12/04/2022] [Accepted: 12/06/2022] [Indexed: 12/15/2022] Open
Abstract
Lung cancer is the most common cancer with high morbidity and mortality worldwide. Our previous studies showed that fucosyltransferase 2 (FUT2) is highly expressed in lung adenocarcinoma (LUAD) and plays a vital role in the tumorigenesis of LUAD. However, the underlying mechanism is not fully understood. Autophagy has recently attracted increasing attention due to its pro-survival role in cancer progression and metastasis. Here, we found that FUT2 was up-regulated and had an AUC (Area Under Curve) value of 0.964 in lung adenocarcinoma based on the TCGA dataset. Knockdown of FUT2 weakened the autophagy response, as evidenced by a degradation of LC3-II and Beclin1. The phosphorylation levels of AMPK, ULK1, and PI3K III were significantly reduced by FUT2 knockdown. FUT2 promoted the translocation of p53 from the cytoplasm into the nucleus, which triggered the DRAM1 pathway and enhanced autophagy. Meanwhile, the knockdown of FUT2 increased the phosphorylation of JNK and promoted mitochondrial-mediated apoptosis. Furthermore, the knockdown of FUT2 inhibited the autophagy induced by Z-VAD-FMK and promoted the apoptosis suppressed by rapamycin. The autophagy and apoptosis regulated by FUT2 antagonized each other. Taken together, these findings provide a mechanistic understanding of how FUT2 mediated the crosstalk between autophagy and apoptosis, which determine lung cancer cell death and survival, leading to the progression of lung adenocarcinoma.
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Affiliation(s)
- Yuqi Zhang
- Institute of Glycobiological Engineering, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou 325035, China
- Key Laboratory of Laboratory Medicine, Ministry of Education, Wenzhou Key Laboratory of Cancer Pathogenesis and Translation, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou 325035, China
- Department of Clinical Genetics, Northwest Women’s and Children’s Hospital, Xi’an 710061, China
| | - Enze Yao
- Institute of Glycobiological Engineering, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou 325035, China
- Key Laboratory of Laboratory Medicine, Ministry of Education, Wenzhou Key Laboratory of Cancer Pathogenesis and Translation, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou 325035, China
- Department of Laboratory, Zhoukou Central Hospital, Zhoukou 466000, China
| | - Yijing Liu
- Institute of Glycobiological Engineering, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou 325035, China
- Key Laboratory of Laboratory Medicine, Ministry of Education, Wenzhou Key Laboratory of Cancer Pathogenesis and Translation, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou 325035, China
| | - Yining Zhang
- Institute of Glycobiological Engineering, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou 325035, China
- Key Laboratory of Laboratory Medicine, Ministry of Education, Wenzhou Key Laboratory of Cancer Pathogenesis and Translation, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou 325035, China
| | - Mengyang Ding
- Institute of Glycobiological Engineering, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou 325035, China
- Key Laboratory of Laboratory Medicine, Ministry of Education, Wenzhou Key Laboratory of Cancer Pathogenesis and Translation, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou 325035, China
| | - Jingyu Liu
- Institute of Glycobiological Engineering, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou 325035, China
- Key Laboratory of Laboratory Medicine, Ministry of Education, Wenzhou Key Laboratory of Cancer Pathogenesis and Translation, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou 325035, China
| | - Xiaoming Chen
- Institute of Glycobiological Engineering, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou 325035, China
- Key Laboratory of Laboratory Medicine, Ministry of Education, Wenzhou Key Laboratory of Cancer Pathogenesis and Translation, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou 325035, China
- Correspondence: (X.C.); (S.F.); Tel.: +86-577-86689690 (X.C.); Fax: +86-577-86689717 (X.C.)
| | - Sairong Fan
- Institute of Glycobiological Engineering, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou 325035, China
- Key Laboratory of Laboratory Medicine, Ministry of Education, Wenzhou Key Laboratory of Cancer Pathogenesis and Translation, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou 325035, China
- Correspondence: (X.C.); (S.F.); Tel.: +86-577-86689690 (X.C.); Fax: +86-577-86689717 (X.C.)
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Li C, Li Z, Yi H, Liu Z. Effect of lncRNA00511 on Non-Small Cell Lung Cancer by Regulating miR-29b-3p. J BIOMATER TISS ENG 2022. [DOI: 10.1166/jbt.2022.3090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This study assessed the effect of LINC00511 on NSCLC cells through regulating miR-29b-3p/DRAM1 axis. LINC00511 expression in NSCLC tissue and para-carcinoma tissue was analyzed and its correlation with TNM stage was assessed. Lung carcinoma cells as A549 cells were cultivated in
vitro and transfected with LINC00511 siRNA or plasmid with DRAM1 overexpression followed by analysis of LINC00511 and miR-184 expression by RT-PCR, cell proliferation and invasion, Bcl-2, Bax and DRAM1 expression by Western Blot. LINC00511 was significantly upregulated in NSCLC tissue
and positively correlated with the TNM staging. However, miR-29b-3p was significantly downregulated in NSCLC tissue. The miR-29b-3p was a target of LINC00511. The DRAM1 was a target of miR-29b-3p. Downregulation of LINC00511 restrained proliferation and invasion of A549 cells and promoted
cell apoptosis. The development of NSCLC could be prompted by increasing the presentation of LINC00511 through increasing presentation of DRAM1 and being targeted with miR-29b-3p. It could be restrained through reducing the presentation of LINC00511.
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Affiliation(s)
- Chunlin Li
- Department of Thoracic Surgery, Affiliated Hospital of Inner Mongolia Medical University, Hohhot City, Inner Mongolia Autonomous Region, 010000, P. R. China
| | - Zhenyu Li
- Department of Thoracic Surgery, Inner Mongolia Armed Police Hospital, Hohhot, Inner Mongolia, 010000, China
| | - Hua Yi
- Department of Pathology Department, Affiliated Hospital of Inner Mongolia Medical University, Hohhot, Inner Mongolia, 010000, China
| | - Zhidong Liu
- Department of Thoracic Surgery, Affiliated Hospital of Inner Mongolia Medical University, Hohhot City, Inner Mongolia Autonomous Region, 010000, P. R. China
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Design, synthesis, and biological evaluation of tetrahydroquinolinones and tetrahydroquinolines with anticancer activity. Sci Rep 2022; 12:9985. [PMID: 35705657 PMCID: PMC9200803 DOI: 10.1038/s41598-022-13867-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Accepted: 05/30/2022] [Indexed: 12/24/2022] Open
Abstract
Colorectal cancer (CRC) is the most commonly diagnosed cancer in Europe and the United States and the second leading cause of cancer related mortality. A therapeutic strategy used for the treatment of CRC involves targeting the intracellular levels of reactive oxygen species (ROS). In this study, we synthesized a series of novel tetrahydroquinolinones and assessed their ability to inhibit CRC growth and proliferation by evoking cellular stress through ROS. Our results revealed that (2-oxo-4-phenyl-5,6,7,8-tetrahydroquinolin-8-yl) N-(3-fluorophenyl)carbamate (20d) exhibited in vitro antiproliferative activity at micromolar concentrations. The compound also suppressed colony formation and the migration of HCT-116 cells, as well as deregulated the expression of several proteins involved in cell proliferation and metastasis. Furthermore, 20d induced massive oxidative stress by disrupting the balance of cells survival resulting in autophagy via the PI3K/AKT/mTOR signaling pathway. These findings suggest that this tetrahydroquinolinone can be an ideal lead compound for drug discovery based on quinone derivatives.
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Impact of phosphorylation of heat shock protein 27 on the expression profile of periodontal ligament fibroblasts during mechanical strain. J Orofac Orthop 2022; 84:143-153. [PMID: 35445818 PMCID: PMC10126016 DOI: 10.1007/s00056-022-00391-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Accepted: 03/04/2022] [Indexed: 10/18/2022]
Abstract
PURPOSE Orthodontic tooth movement is a complex process involving the remodeling of extracellular matrix and bone as well as inflammatory processes. During orthodontic treatment, sterile inflammation and mechanical loading favor the production of receptor activator of NF-κB ligand (RANKL). Simultaneously, expression of osteoprotegerin (OPG) is inhibited. This stimulates bone resorption on the pressure side. Recently, heat shock protein 27 (HSP27) was shown to be expressed in the periodontal ligament after force application and to interfere with inflammatory processes. METHODS We investigated the effects of phosphorylated HSP27 on collagen synthesis (COL1A2 mRNA), inflammation (IL1B mRNA, IL6 mRNA, PTGS2 protein) and bone remodeling (RANKL protein, OPG protein) in human periodontal ligament fibroblasts (PDLF) without and with transfection of a plasmid mimicking permanent phosphorylation of HSP27 using real-time quantitative polymerase chain reaction (RT-qPCR), western blot and enzyme-linked immunosorbent assays (ELISAs). Furthermore, we investigated PDLF-induced osteoclastogenesis after compressive strain in a co-culture model with human macrophages. RESULTS In particular, phosphorylated HSP27 increased gene expression of COL1A2 and protein expression of PTGS2, while IL6 mRNA levels were reduced. Furthermore, we observed an increasing effect on the RANKL/OPG ratio and osteoclastogenesis mediated by PDLF. CONCLUSION Phosphorylation of HSP27 may therefore be involved in the regulation of orthodontic tooth movement by impairment of the sterile inflammation response and osteoclastogenesis.
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Ma K, Li Y, Dong X, Guo J. AMPK-mediated autophagy modulates the inflammatory cytokine expression in intestinal epithelial cells induced by high glucose. EUR J INFLAMM 2022. [DOI: 10.1177/1721727x221106506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Introduction: The homeostasis of intestinal epithelial cells (IECs) is disrupted in diabetes, leading to functional changes of the gastrointestinal tract and increasing the risk of diabetic enteropathy. Methods: The aim of this study is to explore the effect of autophagy on the expression of inflammatory factors under high glucose in vitro. The effect of glucose at different concentrations (5, 10, 30 and 50 Mm) on IEC-6 cells was analyzed. Dorsomorphin (AMPK antagonist) and GSK621 (AMPK agonist) were used to examine the relationship between the autophagy and the AMPK/ULK1 signaling pathway in IEC-6 cells. Results: Our results showed that the high glucose significantly inhibited the growth of IECs, and induced more shrinkage and necrosis of cells. Autophagy was inhibited by high glucose. Furthermore, the levels of cytokines, including IL-22, INF-γ, NOS2, and TNF-α, were significantly increased, which were positively correlated with glucose concentration. Additionally, we confirmed that Dorsomorphin down-regulated the expression of p-AMPK and autophagy protein compared with GSK621. Similar, cellular immunofluorescence also detected low autophagy expression. However, GSK621 and Rapamycin increased the level of autophagy and down-regulated the secretion of pro-inflammatory factors compared with Dorsomorphin. Conclusion: Therefore, our results demonstrate that AMPK mediated autophagy may regulate levels of inflammation in IECs and improve cell survival under high glucose.
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Affiliation(s)
- Kun Ma
- Department of Pediatrics, The First Affiliated Hospital of Shandong First Medical University, Jinan, China
| | - Yun Li
- Department of Critical Care Medicine, Central Hospital Affiliated to Shandong First Medical University, Jinan, China
| | - Xiaolin Dong
- Department of General medicine, Central Hospital Affiliated to Shandong First Medical University, Jinan, China
| | - Jingjing Guo
- Department of General medicine, Central Hospital Affiliated to Shandong First Medical University, Jinan, China
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LINC01515 promotes nasopharyngeal carcinoma progression by serving as a sponge for miR-325 to up-regulate CDCA5. J Mol Histol 2021; 52:577-587. [PMID: 33770322 DOI: 10.1007/s10735-021-09969-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Accepted: 03/11/2021] [Indexed: 12/24/2022]
Abstract
Long non-coding RNAs (LncRNAs) have gained widespread interest and attention as vital regulators in cancer occurrence and development. Nonetheless, the functions and mechanisms of lncRNAs involved in nasopharyngeal carcinoma (NPC) are largely unknown. By analysing the data from GSE61218, we identified a novel lncRNA LINC01515 which is altered in NPC. A series of experiments were performed to examine the exact roles of LINC01515 as well as the molecular mechanisms by which LINC01515 acted in NPC. LINC01515 expression was increased in NPC and that high LINC01515 expression was associated with a worse prognosis. Functionally, depletion of LINC01515 resulted in an inhibition of cell proliferation, migration and invasion, while apoptosis was promoted. Mechanistically, LINC01515 facilitated cell division cycle associated 5 (CDCA5) expression via serving as a sponge for miR-325. And more notably, miR-325 suppressed NPC progression in vitro by targeting CDCA5. Furthermore, the anti-tumor property induced by LINC01515 knockdown was partially reversed due to the overexpression of CDCA5. Taken together, LINC01515 exerted the carcinogenic effect in NPC through regulating miR-325/CDCA5 pathway. Our findings shed light on the possibility of exploiting LINC01515 as a prognostic biomarker or therapeutic target in NPC.
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