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Fang KT, Hung H, Lau NYS, Chi JH, Wu DC, Cheng KH. Development of a Genetically Engineered Mouse Model Recapitulating LKB1 and PTEN Deficiency in Gastric Cancer Pathogenesis. Cancers (Basel) 2023; 15:5893. [PMID: 38136437 PMCID: PMC10741874 DOI: 10.3390/cancers15245893] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 12/12/2023] [Accepted: 12/15/2023] [Indexed: 12/24/2023] Open
Abstract
The LKB1 and PTEN genes are critical in gastric cancer (G.C.) development. LKB1, a robust tumor suppressor gene, encodes a serine/threonine kinase that directly triggers the activation of AMPK-an integral cellular metabolic kinase. The role of the LKB1 pathway extends to maintaining the stability of epithelial junctions by regulating E-cadherin expression. Conversely, PTEN, a frequently mutated tumor suppressor gene in various human cancers, emerges as a pivotal negative regulator of the phosphoinositide 3-kinase (PI3K) signaling pathway. This study is set to leverage the H+/K+ ATPase Cre transgene strain to precisely target Cre recombinase expression at parietal cells within the stomach. This strategic maneuver seeks to selectively nullify the functions of both LKB1 and PTEN in a manner specific to the stomach, thereby instigating the development of G.C. in a fashion akin to human gastric adenocarcinoma. Moreover, this study endeavors to dissect the intricate ways in which these alterations contribute to the histopathologic advancement of gastric tumors, their potential for invasiveness and metastasis, their angiogenesis, and the evolving tumor stromal microenvironment. Our results show that conditional deletion of PTEN and LKB1 provides an ideal cancer microenvironment for G.C. tumorigenesis by promoting cancer cell proliferation, angiogenesis, and metastasis.
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Affiliation(s)
- Kuan-Te Fang
- Institute of Biomedical Sciences, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan; (K.-T.F.); (H.H.); (N.Y.S.L.); (J.-H.C.)
| | - Hsin Hung
- Institute of Biomedical Sciences, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan; (K.-T.F.); (H.H.); (N.Y.S.L.); (J.-H.C.)
| | - Nga Yin Sadonna Lau
- Institute of Biomedical Sciences, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan; (K.-T.F.); (H.H.); (N.Y.S.L.); (J.-H.C.)
- Center of Excellence for Metabolic Associated Fatty Liver Disease, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan
| | - Jou-Hsi Chi
- Institute of Biomedical Sciences, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan; (K.-T.F.); (H.H.); (N.Y.S.L.); (J.-H.C.)
- Center of Excellence for Metabolic Associated Fatty Liver Disease, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan
| | - Deng-Chyang Wu
- Division of Gastroenterology, Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung 80708, Taiwan;
| | - Kuang-Hung Cheng
- Institute of Biomedical Sciences, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan; (K.-T.F.); (H.H.); (N.Y.S.L.); (J.-H.C.)
- Center of Excellence for Metabolic Associated Fatty Liver Disease, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan
- Department of Medical Laboratory Science and Biotechnology, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
- National Institute of Cancer Research, National Health Research Institutes, Tainan 70456, Taiwan
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Yarmohammadi F, Ebrahimian Z, Karimi G. MicroRNAs target the PI3K/Akt/p53 and the Sirt1/Nrf2 signaling pathways in doxorubicin-induced cardiotoxicity. J Biochem Mol Toxicol 2023; 37:e23261. [PMID: 36416353 DOI: 10.1002/jbt.23261] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 06/06/2022] [Accepted: 11/14/2022] [Indexed: 11/24/2022]
Abstract
Doxorubicin (DOX) is used as a chemotherapeutic agent in the treatment of solid tumors. Irreversible cardiotoxicity is the major limitation in the clinical use of DOX. Several microRNAs (miRNAs) with diversified functions are identified that participate in exacerbating or suppressing DOX-induced cardiac damage. The miRNAs are small noncoding regulatory RNAs that modify the expression of the native genes. Studies have demonstrated that miRNAs by modifying the expression of proteins such as PTEN, Akt, and survivin can affect DOX-induced cardiac apoptosis. Moreover, miRNAs can modulate cardiac oxidative stress in DOX treatment through the posttranscriptional regulation of Sirt1, p66shc, and Nrf2 expressions. This manuscript has reviewed the regulation of the PI3K/Akt/p53 and the Sirt1/Nrf2 pathways by miRNAs in DOX-induced cardiotoxicity.
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Affiliation(s)
- Fatemeh Yarmohammadi
- Department of Pharmacodynamics and Toxicology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Zainab Ebrahimian
- Department of Pharmacodynamics and Toxicology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Gholamreza Karimi
- Department of Pharmacodynamics and Toxicology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran.,Pharmaceutical Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran
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Zhang Y, Wang X, Wang S, Liu J, Li R, Li X, Zhang R. Circ-ERBB2 knockdown sensitized colorectal cancer cells to 5-FU via miR-181a-5p/PTEN/Akt pathway. J Biochem Mol Toxicol 2023; 37:e23297. [PMID: 36639866 DOI: 10.1002/jbt.23297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 11/03/2022] [Accepted: 01/05/2023] [Indexed: 01/15/2023]
Abstract
Colorectal cancer (CRC) is the fourth most deadly cancer worldwide, drug resistance impedes treatment of CRC. It is still urgent to find new molecular targets to improve the sensitivity of chemotherapeutic drugs. In this study, circ-ERBB2 was upregulated in CRC cells. Upregulation of circ-ERBB2 promoted CRC cells proliferation and clone formation, but inhibited apoptosis. We identified miR-181a-5p as circ-ERBB2's target. The effect of miR-181a-5p on CRC cells was contrary to circ-ERBB2, miR-181a-5p downregulation abolished the function of circ-ERBB2 silencing in CRC cells. In addition, phosphatase and tensin homolog (PTEN) was verified as miR-181a-5p's downstream target, circ-ERBB2 activates the Akt pathway and inhibits cell apoptosis through modulating miR-181a-5p/PTEN. Circ-ERBB2 silencing significantly reduced CRC cell resistance to 5-FU. miR-181a-5p downregulation abolished the role of circ-ERBB2 knockdown in CRC cell resistance to 5-FU. In conclusion, upregulation of circ-ERBB2 promoted the malignancy of CRC and reduced CRC cell resistance to 5-FU. Besides, additional mechanism study provided a novel regulatory pathways that circ-ERBB2 knockdown promoted CRC cell sensitivity to 5-FU by regulating miR-181a-5p/PTEN/Akt pathway. This research indicated that circ-ERBB2 may be a valuable biomarker for the diagnosis and treatment of CRC.
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Affiliation(s)
- Yueli Zhang
- Department of Clinical Pharmacy, Zhengzhou Central Hospital Affiliated to Zhengzhou University, Zhengzhou, People's Republic of China
| | - Xinchun Wang
- Department of Pharmacy, Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, People's Republic of China
| | - Shuyun Wang
- Department of Pharmacy, Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, People's Republic of China
| | - Jia Liu
- Department of Clinical Pharmacy, Zhengzhou Central Hospital Affiliated to Zhengzhou University, Zhengzhou, People's Republic of China
| | - Ruijia Li
- Department of Pharmacy, The Eight Hospital of Xian, Xian, People's Republic of China
| | - Xiaoxia Li
- Department of Pharmacy, Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, People's Republic of China
| | - Rui Zhang
- Emergency Department, Shaanxi Provincial Cancer Hospital, College of Medicine, Xi'an Jiaotong University, Xian, People's Republic of China
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Zhang ZZ, Wen CH, Jia M, Zhang HQ, Sun SQ. Alkannin exerts antitumor properties in cutaneous squamous cell carcinoma by inducing apoptosis and shifting the M1/M2 polarization of tumor-associated macrophages by upregulating PTEN. Kaohsiung J Med Sci 2023; 39:70-79. [PMID: 36367154 DOI: 10.1002/kjm2.12617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 09/15/2022] [Accepted: 10/11/2022] [Indexed: 11/13/2022] Open
Abstract
Cutaneous squamous cell carcinoma (CSCC) is a common cancer in humans and is the second major type of skin cancer that causes death in humans. In this article, we investigated the effects of alkannin on CSCC progression. We revealed that alkannin curbed CSCC cell viability in a dose-dependent manner and accelerated CSCC cell apoptosis. In addition, alkannin expedited macrophage M1 polarization while curbing M2 polarization. Moreover, alkannin elevated phosphatase and tensin homolog (PTEN) abundance in CSCC cells. The results of bioinformatics analysis revealed that alkannin might modulate CSCC via PTEN. Downregulation of PTEN reversed the effects of alkannin on apoptosis of CSCC cells and M1/M2 polarization of macrophages. Alkannin reduced CSCC tumor growth in a mouse xenograft model. In conclusion, alkannin curbed the advancement of CSCC by expediting apoptosis and facilitating M1 polarization of macrophages by upregulating PTEN. These data may offer a therapeutic approach against CSCC.
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Affiliation(s)
- Zhong-Zhao Zhang
- Department of Dermatology, The First Affiliated Hospital of Guizhou University of Chinese Medicine, Guiyang, China
| | - Chang-Hui Wen
- Department of Dermatology, The First Affiliated Hospital of Guizhou University of Chinese Medicine, Guiyang, China
| | - Min Jia
- Department of Dermatology, The First Affiliated Hospital of Guizhou University of Chinese Medicine, Guiyang, China
| | - Hong-Qiang Zhang
- Department of Dermatology, The First Affiliated Hospital of Guizhou University of Chinese Medicine, Guiyang, China
| | - Shao-Qin Sun
- Department of Dermatology, The First Affiliated Hospital of Guizhou University of Chinese Medicine, Guiyang, China
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Lu SY, Hong WZ, Tsai BCK, Chang YC, Kuo CH, Mhone TG, Chen RJ, Kuo WW, Huang CY. Angiotensin II prompts heart cell apoptosis via AT1 receptor-augmented phosphatase and tensin homolog and miR-320-3p functions to enhance suppression of the IGF1R-PI3K-AKT survival pathway. J Hypertens 2022; 40:2502-2512. [PMID: 36093879 PMCID: PMC9640294 DOI: 10.1097/hjh.0000000000003285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Revised: 07/21/2022] [Accepted: 07/21/2022] [Indexed: 11/25/2022]
Abstract
BACKGROUND Hypertension is a severe public health risk factor worldwide. Elevated angiotensin II (Ang II) produced by the renin-angiotensin-aldosterone system can lead to hypertension and its complications. METHOD In this study, we addressed the cardiac-injury effects of Ang II and investigated the signaling mechanism induced by Ang II. Both H9c2 cardiomyoblast cells and neonatal rat cardiomyocytes were exposed to Ang II to observe hypertension-related cardiac apoptosis. RESULTS The results of western blotting revealed that Ang II significantly attenuated the IGF1R-PI3K-AKT pathway via the Ang II-AT1 receptor axis and phosphatase and tensin homolog expression. Furthermore, real-time PCR showed that Ang II also activated miR-320-3p transcription to repress the PI3K-Akt pathway. In the heart tissue of spontaneously hypertensive rats, activation of the IGF1R survival pathway was also reduced compared with that in Wistar-Kyoto rats, especially in aged spontaneously hypertensive rats. CONCLUSION Hence, we speculate that the Ang II-AT1 receptor axis induces both phosphatase and tensin homolog and miR-320-3p expression to downregulate the IGF1R-PI3K-AKT survival pathway and cause cell apoptosis in the heart.
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Affiliation(s)
- Shang-Yeh Lu
- Division of Cardiovascular Medicine, Department of Internal Medicine, China Medical University Hospital
- Graduate Institute of Biomedical Sciences, China Medical University, Taichung
| | - Wei-Zhi Hong
- Cardiovascular and Mitochondrial Related Disease Research Center, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien
| | - Bruce Chi-Kang Tsai
- Cardiovascular and Mitochondrial Related Disease Research Center, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien
| | - Yu-Chun Chang
- Cardiovascular and Mitochondrial Related Disease Research Center, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien
| | - Chia-Hua Kuo
- Laboratory of Exercise Biochemistry, Institute of Sports Sciences, University of Taipei
| | - Thomas G. Mhone
- Graduate Institute of Biomedical Sciences, China Medical University, Taichung
| | - Ray-Jade Chen
- Department of Surgery, School of Medicine, College of Medicine, Taipei Medical University, Taipei
| | - Wei-Wen Kuo
- Department of Biological Science and Technology, China Medical University
- PhD Program for Biotechnology Industry, China Medical University
| | - Chih-Yang Huang
- Graduate Institute of Biomedical Sciences, China Medical University, Taichung
- Cardiovascular and Mitochondrial Related Disease Research Center, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien
- Department of Medical Laboratory Science and Biotechnology, Asia University, Taichung
- Center of General Education, Buddhist Tzu Chi Medical Foundation, Tzu Chi University of Science and Technology, Hualien
- Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, Taiwan
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Giotta Lucifero A, Luzzi S. Immune Landscape in PTEN-Related Glioma Microenvironment: A Bioinformatic Analysis. Brain Sci 2022; 12. [PMID: 35448032 DOI: 10.3390/brainsci12040501] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 03/30/2022] [Accepted: 04/12/2022] [Indexed: 02/04/2023] Open
Abstract
Introduction: PTEN gene mutations are frequently found in the genetic landscape of high-grade gliomas since they influence cell proliferation, proangiogenetic pathways, and antitumoral immune response. The present bioinformatics analysis explores the PTEN gene expression profile in HGGs as a prognostic factor for survival, especially focusing on the related immune microenvironment. The effects of PTEN mutation on the susceptibility to conventional chemotherapy were also investigated. Methods: Clinical and genetic data of GBMs and normal tissue samples were acquired from The Cancer Genome Atlas (TCGA)-GBM and Genotype-Tissue Expression (GTEx) online databases, respectively. The genetic differential expressions were analyzed in both groups via the one-way ANOVA test. Kaplan−Meier survival curves were applied to estimate the overall survival (OS) and disease-free survival (DFS). The Genomics of Drug Sensitivity in Cancer platform was chosen to assess the response of PTEN-mutated GBMs to temozolomide (TMZ). p < 0.05 was fixed as statistically significant. On Tumor Immune Estimation Resource and Gene Expression Profiling Interactive Analysis databases, the linkage between immune cell recruitment and PTEN status was assessed through Spearman’s correlation analysis. Results: PTEN was found mutated in 22.2% of the 617 TCGA-GBMs patients, with a higher log2-transcriptome per million reads compared to the GTEx group (255 samples). Survival curves revealed a worse OS and DFS, albeit not significant, for the high-PTEN profile GBMs. Spearman’s analysis of immune cells demonstrated a strong positive correlation between the PTEN status and infiltration of Treg (ρ = 0.179) and M2 macrophages (ρ = 0.303). The half-maximal inhibitor concentration of TMZ was proven to be lower for PTEN-mutated GBMs compared with PTEN wild-types. Conclusions: PTEN gene mutations prevail in GBMs and are strongly related to poor prognosis and least survival. The infiltrating immune lymphocytes Treg and M2 macrophages populate the glioma microenvironment and control the mechanisms of tumor progression, immune escape, and sensitivity to standard chemotherapy. Broader studies are required to confirm these findings and turn them into new therapeutic perspectives.
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Boldrini L, Giordano M, Melfi F, Lucchi M, Fontanini G. Expression of miRNA-25 in young and old lung adenocarcinoma. J Res Med Sci 2022; 26:132. [PMID: 35126595 PMCID: PMC8772505 DOI: 10.4103/jrms.jrms_830_19] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 02/06/2020] [Accepted: 03/02/2020] [Indexed: 12/15/2022]
Abstract
Background: An appropriate personalized molecular testing ensures the most efficacious treatment in lung cancer. It is still controversial whether younger lung adenocarcinoma (LUAD) patients have different molecular features compared with their older counterparts. MicroRNAs have been involved in lung cancer and their altered expression has been suggested as a potential biomarker in the pathogenesis, diagnosis, prognosis, and therapy of LUAD. Materials and Methods: To analyze putative differences in miR-25 expression between young (with age ≤50 years) and old adenocarcinoma patients, we quantified miR-25 levels with NanoString technology in 88 LUAD specimens. We further investigated a cohort of 309 LUAD patients from the cancer genome atlas (TCGA) database to test our hypothesis. Results: miR-25 expression was upregulated in young LUAD patients in comparison to the older ones (P = 0.03) in our series. The analysis of public database TCGA confirmed our results, which miR-25 differentially expressed in the two aged groups (P = 0.0009). Moreover, a consequential pairing of miR-25 with a target region in phosphatase and tensin homolog (PTEN) 3’ untranslated region (UTR) and actually low PTEN expression seemed to be associated with high miR-25 (P = 0.001) in young patients. Conclusions: The interaction of miR-25 and PTEN in young LUAD may define a subgroup of patients, highlighting the concept of molecular testing in different age subtypes.
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Affiliation(s)
- Laura Boldrini
- Department of Surgical, Medical, Molecular Pathology and Critical Area, University of Pisa, Pisa, Italy
| | - Mirella Giordano
- Department of Surgical, Medical, Molecular Pathology and Critical Area, University of Pisa, Pisa, Italy
| | - Franca Melfi
- Department of Surgical, Medical, Molecular Pathology and Critical Area, University of Pisa, Pisa, Italy
| | - Marco Lucchi
- Department of Surgical, Medical, Molecular Pathology and Critical Area, University of Pisa, Pisa, Italy
| | - Gabriella Fontanini
- Department of Surgical, Medical, Molecular Pathology and Critical Area, University of Pisa, Pisa, Italy
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Imlau M, Saeed M, Cryan J, Hoey S, McKenna M, Jahns H, Kelly P. Dysplastic gangliocytoma of the cerebellum in a cat. Vet Pathol 2022; 59:459-462. [PMID: 35130805 PMCID: PMC9109245 DOI: 10.1177/03009858221075594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
A 2.5-year-old cat presented with progressive ataxia and lethargy. Magnetic resonance imaging (MRI) showed enlargement of the cerebellum and herniation of cerebellar vermis. Postmortem examination confirmed the MRI findings, and histopathology showed numerous large dysplastic neurons populating and displacing the Purkinje cell layer and extending into the molecular and granular layers of the cerebellum. The lesion was diagnosed as dysplastic gangliocytoma of the cerebellum. In humans, this tumor is often associated with Cowden syndrome, a genetic disorder characterized by multiple hamartomas and an increased risk of developing certain neoplasms, known to be linked to a germline mutation of the phosphatase and tensin homolog (PTEN) gene. Reduction in PTEN nuclear and cytoplasmic immunohistochemical labeling of dysplastic neurons in this case suggested a possible PTEN mutation involved in the tumorigenesis. This report provides a detailed pathology description of the tumor and the use of neuronal and PTEN markers which will help guide pathologists presented with this rare condition in the future.
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Lv G, Chen Y, Cheng Z, Lin L, Shen H. Circ_0006873 Sponges miR-142-5p to Inhibit Osteoblastic Differentiation of hBMSCs via Regulating PTEN/Akt Signaling Pathway. Ann Clin Lab Sci 2022; 52:48-59. [PMID: 35181618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
OBJECTIVE Osteoporosis is likely becoming a new disease challenge with increasing aging population. Circ_0006873 dysregulation may serve as an event linked to osteoporosis. Thus, this study sought to evaluate the function and mechanism of circ_0006873 on osteoporosis. METHODS Clinical serum samples collected from 30 osteoporosis patients were utilized to obtain circ_0006873 and miR-142-5p expression data. The link between circ_0006873, miR-142-5p, and phosphatase and tensin homolog (PTEN) was demonstrated via online tools (starBase, circinteractome), RNA Immunoprecipitation (RIP) and dual-Luciferase reporter assays. After knockdown or overexpression, cell counting kit-8 (CCK-8) assay measured cell viability. Alizarin red S (ARS) staining as well Alkaline phosphatase (ALP) staining detected osteoblastic differentiation levels. Quantitative real-time PCR (qRT-PCR) and western blot analyzed expression of RNAs and proteins after transfection or during osteoblastic differentiation. RESULTS circ_0006873 was upregulated in osteoporosis patients and decreased during osteoblastic differentiation. Following experiments revealed that cell viability, proliferation-related factors, osteogenic marker genes (ALP, Runx2, Bglap) and osteoblastic differentiation degree were promoted after circ_0006873 knockdown but inhibited after overexpression. Circ_0006873 sponged miR-142-5p, which was downregulated in osteoporosis patients and became higher during osteoblastic differentiation. Rescue assay indicated miR-142-5p mimic could reverse the effects of circ_0006873 overexpression on cell viability and osteogenic markers, and also could activate Akt pathway. Furthermore, circ_0006873 can negatively target miR-142-5p via regulating PTEN to inhibit osteoblastic differentiation. CONCLUSION Circ_0006873 sponges miR-142-5p thereby enhances PTEN expression to suppress osteoblastic differentiation via regulation of Akt signaling pathway, thus, may provide a treatment approach for osteoporosis.
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Affiliation(s)
- Guomin Lv
- Department of Orthopedics, Pingyang Hospital Affiliated to Wenzhou Medical University, China
- Clinical College of Hebei Medical University, China
| | - Yan Chen
- Department of Orthopedics, Pingyang Hospital Affiliated to Wenzhou Medical University, China
- Zhejiang Medical University, China
| | - Zhengyue Cheng
- Department of Orthopedics, Pingyang Hospital Affiliated to Wenzhou Medical University, China
- Wenzhou Medical University, China
| | - Lixiang Lin
- Department of Orthopedics, Pingyang Hospital Affiliated to Wenzhou Medical University, China
- Wenzhou Medical University, China
| | - Huasong Shen
- Department of Orthopedics, Zhuji People's Hospital of Zhejiang Province, China
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Ko H, Ahn HJ, Kim YI. Methylation and mutation of the inhibin‑α gene in human melanoma cells and regulation of PTEN expression and AKT/PI3K signaling by a demethylating agent. Oncol Rep 2021; 47:37. [PMID: 34958114 DOI: 10.3892/or.2021.8248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Accepted: 11/23/2021] [Indexed: 11/06/2022] Open
Abstract
Inhibin suppresses the pituitary secretion of follicle‑stimulating hormone and has been reported to act as a tumor suppressor gene in the gonad in mice. Epigenetic modifications, mutations, changes in the loss of heterozygosity (LOH) of the inhibin‑α gene and regulation of gene expression in response to a demethylating agent [5‑aza‑2'‑deoxycytidine (5‑Aza‑dC)] in human melanoma cells were assessed. In addition, the association between a mutation in the 5'‑untranslated region (5'‑UTR) of the inhibin‑α subunit and the expression of phosphatidylinositol 3,4,5‑trisphosphate‑dependent Rac exchanger 2 (PREX2) and phosphatase and tensin homolog (PTEN) as well as AKT/PI3K signaling was determined. The methylation status of the CpG sites of the inhibin‑α promoter was analyzed by methylation‑specific PCR in bisulfite‑treated DNA. Cell viability was counted using the trypan blue assay, mRNA expression was examined via reverse transcription‑quantitative PCR, and protein expression was examined via western blot analysis. The inhibin‑α promoter was hypermethylated in G361, SK‑MEL‑3, SK‑MEL‑24 and SK‑MEL‑28 cells and moderately methylated in SK‑MEL‑5 cells. Inhibin‑α gene mutations were observed in the 5'‑UTR exon 1 of G361, SK‑MEL‑5, SK‑MEL‑24 and SK‑MEL‑28 cells as well as in exon 2 of SK‑MEL‑3 cells. Allelic imbalance, including LOH, in the inhibin‑α gene was detected in human melanoma cells. Treatment with 5‑Aza‑dC increased inhibin‑α mRNA and protein levels, inhibited cell proliferation, and delayed the doubling times of surviving melanoma cells. In 5‑Aza‑dC‑treated cells, PREX2 protein expression was slightly increased in G361 and SK‑MEL‑24 cells and decreased in SK‑MEL3, SK‑MEL‑5 and SK‑MEL‑28 cells. However, the protein expression of PTEN was decreased in melanoma cells. In addition, AKT and PI3K protein phosphorylation levels increased in all melanoma cells, except of G361 cells, demonstrating decreased PI3K protein phosphorylation. These data provided evidence that methylation, mutation and LOH are observed in the inhibin α‑subunit gene and gene locus in human melanoma cells. Furthermore, the demethylating agent reactivated inhibin‑α gene expression and regulated PREX2 expression. AKT/PI3K signaling increased as PTEN expression decreased. In addition, mutations in the tumor suppressor inhibin‑α, PTEN and p53 genes were not associated with transcriptional silencing, gene expression and cell growth as analyzed through experiments and literature reviews. These data demonstrated that methylation and mutations were associated with the inhibin‑α gene in human melanoma cells and indicated the regulation of PTEN expression and AKT/PI3K signaling by a demethylating agent.
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Affiliation(s)
- Hyunmin Ko
- Department of Surgery, College of Medicine, Kyung Hee University, Dongdaemun, Seoul 02447, Republic of Korea
| | - Hyung Joon Ahn
- Department of Surgery, College of Medicine, Kyung Hee University, Dongdaemun, Seoul 02447, Republic of Korea
| | - Young Il Kim
- Medical Science Research Institute, Kyung Hee University Medical Center, Dongdaemun, Seoul 02447, Republic of Korea
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Wang N, Yang B, Jin J, He Y, Wu X, Yang Y, Zhou W, He Z. Circular RNA circ_0040823 inhibits the proliferation of acute myeloid leukemia cells and induces apoptosis by regulating miR-516b/PTEN. J Gene Med 2021; 24:e3404. [PMID: 34913223 DOI: 10.1002/jgm.3404] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 11/26/2021] [Accepted: 12/13/2021] [Indexed: 11/08/2022] Open
Abstract
OBJECTIVE Endogenous circular RNAs (circRNAs) and microRNAs (miRNAs) have been shown to regulate the pathogenesis of acute myeloid leukemia (AML). The current study aimed to identify the role of circRNA 0040823 (circ_0040823) in AML. METHODS Microarray datasets were analyzed to identify differentially expressed circRNAs in AML patients. Peripheral blood samples were obtained from healthy volunteers and AML patients for the measurement of circ_0040823 and miR-516b levels. The overexpression or knockdown of a target gene in AML cells was achieved by the transfection with lentiviral vectors or small interfering RNAs. BALB/c nude mice were inoculated with AML cells and monitored for tumor growth. Dual-luciferase reporter assay, RNA immunoprecipitation, and RNA pull-down assay were used to determine the binding relationship between circRNA and miRNA. RESULTS circ_0040823 was significantly downregulated in AML patients and leukemia cells. Overexpression of circ_0040823 inhibited AML cell proliferation, and induced apoptosis and cell cycle arrest. Upregulation of circ_0040823 also repressed the growth of xenograft tumors in vivo. circ_0040823 acted as a miR-516b sponge and regulated key cellular events in leukemia cells via downregulating miR-516b. Moreover, tumor suppressor phosphatase and tensin homolog (PTEN) was a downstream target of miR-516b. The inhibition of miR-516b impaired the proliferation capacity of leukemia cells and induced apoptosis, while PTEN deficiency attenuated these effects. CONCLUSION This study showed that circ_0040823 inhibited proliferation and induced apoptosis of AML cells by sponging miR-516b, thereby diminishing the regulatory effect of miR-516b on PTEN. These findings identified circ_0040823/miR-516b/PTEN as a new therapeutic target for AML.
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Affiliation(s)
- Nianxue Wang
- Department of Immunology, Guizhou Medical University, Guiyang City, Guizhou Province, China
| | - Bin Yang
- Department of Central Laboratory, Guizhou Provincial People's Hospital, Guiyang City, Guizhou Province, China
| | - Jiao Jin
- Department of Pediatric Hematology, Affiliated Hospital of Guizhou Medical University, Guiyang City, Guizhou Province, China
| | - Yu He
- Department of Central Laboratory, Guizhou Provincial People's Hospital, Guiyang City, Guizhou Province, China
| | - Xijun Wu
- Department of Clinical Lab, The Second People's Hospital of Guiyang, Guiyang City, Guizhou Province, China
| | - Yichen Yang
- Department of Central Laboratory, Guizhou Provincial People's Hospital, Guiyang City, Guizhou Province, China
| | - Weijun Zhou
- Department of Immunology, Guizhou Medical University, Guiyang City, Guizhou Province, China
| | - Zhixu He
- Department of Pediatric Hematology, Affiliated Hospital of Guizhou Medical University, Guiyang City, Guizhou Province, China.,Department of Pediatrics, Affiliated Hospital of Zunyi Medical University, Zunyi City, Guizhou Province, China
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Lu Z, Li L, Wei L, Cai J, Wu J. Long non-coding RNA LOC366613 alleviates the cerebral ischemic injury via regulating the miR-532-5p/ phosphatase and tensin homolog axis. Bioengineered 2021; 12:2511-2522. [PMID: 34251959 PMCID: PMC8806633 DOI: 10.1080/21655979.2021.1930966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Accepted: 05/12/2021] [Indexed: 11/11/2022] Open
Abstract
Cerebral infarction (CI) has become a leading cause of death in China. Long non-coding RNAs (lncRNAs) are intensively involved in the progression of CI. Here, we aimed to investigate the effects of lncRNA LOC366613 (LOC366613) on cerebral I/R injury, as well as its possible mechanism. Transient middle cerebral artery occlusion (MCAO) was used to establish a mouse model of cerebral I/R, and the PC12 cell line was used to establish an in vitro oxygen-glucose deprivation (OGD) injury model. The MTT assay was used to determine cell viability, and qRT-PCR was used to determine RNA levels. Western blotting was conducted to detect protein expression levels. The TUNEL assay and flow cytometry were used to measure cell apoptosis, and 2,3,5-triphenyltetrazolium chloride (TTC) was used to determine cerebral infarct volume. Finally, RNA pull-down and luciferase activity assays were used to examine interactions between miR-532-5p and LOC366613, as well as between miR-532-5p and phosphatase and tensin homolog (PTEN). LOC366613 was overexpressed in patients with cerebral I/R injury. In PC12 cells, knockdown of LOC366613 reduced the apoptosis rate and lactic acid dehydrogenase (LDH) expression, while increasing cell viability. Moreover, miR-532-5p was shown to be a target of LOC366613, as predicted. Downregulation of miR-532-5p reversed the effects of LOC366613 knockdown on PC12 cell apoptosis, LDH release, and cell viability. Finally, PTEN was verified as a target of miR-532-5p. LOC366613 participates in cerebral I/R injury by regulating the miR-532-5p/PTEN axis, potentially providing a new CI treatment target.
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Affiliation(s)
- Zhenze Lu
- Guangzhou Medical University Graduate School
- Neurology, Department of Medicine, The University of Hong Kong-Shenzhen Hospital
| | - Ling Li
- Neurology, Department of Medicine, The University of Hong Kong-Shenzhen Hospital
| | - Lei Wei
- Department of Neurology, The Third Affiliated Hospital of Sun Yat-Sen University
| | - Jifu Cai
- Neurology, Department of Medicine, The University of Hong Kong-Shenzhen Hospital
| | - Jun Wu
- Department of Neurology, Peking University Shenzhen Hospital
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13
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Wang L, Sang J, Zhang Y, Gao L, Zhao D, Cao H. Circular RNA ITCH attenuates the progression of nasopharyngeal carcinoma by inducing PTEN upregulation via miR-214. J Gene Med 2021; 24:e3391. [PMID: 34612550 DOI: 10.1002/jgm.3391] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2021] [Revised: 09/23/2021] [Accepted: 09/25/2021] [Indexed: 01/23/2023] Open
Abstract
BACKGROUND Circular RNA itchy E3 ubiquitin protein ligase (circ-ITCH) has previously been reported to play a key role in carcinogenesis. Nevertheless, the role of circ-ITCH in nasopharyngeal carcinoma (NPC) remains to be explored. METHODS Gene expression analysis was performed using a quantitative real-time polymerase chain reaction, western blotting and immunohistochemistry. The role of circ-ITCH in NPC was explored using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide, colony formation, transwell invasion, scratch healing and xenograft tumor assays. Furthermore, luciferase reporter assay was carried out to assess the interactions among circ-ITCH, microRNA-214 (miR-214) and phosphatase and tensin homolog (PTEN). RESULTS The levels of circ-ITCH and PTEN were decreased, whereas the level of miR-214 was increased in NPC tissues collected from 28 subjects compared to normal nasopharynx tissues collected from 15 subjects. Moreover, a negative correlation between circ-ITCH and miR-214 expression and a positive correlation between circ-ITCH and PTEN expression were observed in NPC tissues. Downregulation of circ-ITCH expression was also observed in NPC cell lines. In addition, upregulation of circ-ITCH markedly inhibited NPC cell proliferation, migration and invasion. Furthermore, circ-ITCH was confirmed to exert its function by sponging miR-214. PTEN was found to be a direct target gene of miR-214 and its expression was negatively correlated with miR-214 expression in NPC tissues. Moreover, our results showed that the circ-ITCH/miR-214 axis regulated NPC proliferation, migration and invasion through regulating the expression of PTEN. Upregulation of circ-ITCH or PTEN blocked miR-214-mediated promotion of NPC tumorigenesis in vitro. Additionally, upregulation of circ-ITCH also suppressed NPC tumorigenesis in vivo. CONCLUSIONS The present study demonstrated that circ-ITCH suppressed NPC tumorigenesis by upregulating PTEN expression through interacting with miR-214, thus proposing a novel mechanism for NPC inhibition.
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Affiliation(s)
- Liuzhong Wang
- Division of Pharyngolaryngology Head and Neck Surgery, Otorhinolaryngology Hospital, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province, China
| | - Jianzhong Sang
- Division of Pharyngolaryngology Head and Neck Surgery, Otorhinolaryngology Hospital, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province, China
| | - Yamin Zhang
- Division of Pharyngolaryngology Head and Neck Surgery, Otorhinolaryngology Hospital, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province, China
| | - Ling Gao
- Division of Pharyngolaryngology Head and Neck Surgery, Otorhinolaryngology Hospital, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province, China
| | - Dongli Zhao
- Division of Pharyngolaryngology Head and Neck Surgery, Otorhinolaryngology Hospital, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province, China
| | - Hua Cao
- Division of Pharyngolaryngology Head and Neck Surgery, Otorhinolaryngology Hospital, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province, China
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Ali A, Kuo W, Kuo C, Lo J, Chen MYC, Daddam JR, Ho T, Viswanadha VP, Shibu MA, Huang C. E3 ligase activity of Carboxyl terminus of Hsc70 interacting protein (CHIP) in Wharton's jelly derived mesenchymal stem cells improves their persistence under hyperglycemic stress and promotes the prophylactic effects against diabetic cardiac damages. Bioeng Transl Med 2021; 6:e10234. [PMID: 34589606 PMCID: PMC8459600 DOI: 10.1002/btm2.10234] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2021] [Revised: 05/21/2021] [Accepted: 05/23/2021] [Indexed: 01/28/2023] Open
Abstract
Recent studies indicate that umbilical cord stem cells are cytoprotective against several disorders. One critical limitation in using stem cells is reduction in their viability under stressful conditions, such as diabetes. However, the molecular intricacies responsible for diabetic conditions are not fully elucidated. In this study, we found that high glucose (HG) conditions induced loss of chaperone homeostasis, stabilized PTEN, triggered the downstream signaling cascade, and induced apoptosis and oxidative stress in Wharton's jelly derived mesenchymal stem cells (WJMSCs). Increased Carboxyl terminus of Hsc70 interacting protein (CHIP) expression promoted phosphatase and tensin homolog (PTEN) degradation via the ubiquitin-proteasome system and shortened its half-life during HG stress. Docking studies confirmed the interaction of CHIP with PTEN and FOXO3a with the Bim promoter region. Further, it was found that the chaperone system is involved in CHIP-mediated PTEN proteasomal degradation. CHIP depletion stabilizes PTEN whereas PTEN inhibition showed an inverse effect. CHIP overactivation suppressed the binding of FOXO3a with bim. Coculturing CHIP overexpressed WJMSCs suppressed HG-induced apoptosis and oxidative stress in embryo derived cardiac cell lines. CHIP overexpressing and PTEN silenced WJMSCs ameliorated diabetic effects in streptozotocin (STZ) induced diabetic rats and further improved their body weight and heart weight, and rescued from hyperglycemia-induced cardiac injury. Considering these, the current study suggests that CHIP confers resistance to apoptosis and acts as a potentiation factor in WJMSCs to provide protection from degenerative effects of diabetes.
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Affiliation(s)
- Ayaz Ali
- Department of Biological Science and TechnologyChina Medical UniversityTaichungTaiwan
| | - Wei‐Wen Kuo
- Department of Biological Science and TechnologyChina Medical UniversityTaichungTaiwan
- Ph.D. Program for Biotechnology Industry, China Medical UniversityTaichungTaiwan
| | - Chia‐Hua Kuo
- Laboratory of Exercise BiochemistryUniversity of TaipeiTaipeiTaiwan
| | - Jeng‐Fan Lo
- Institute of Oral Biology, National Yang‐Ming UniversityTaipeiTaiwan
| | | | - Jayasimha R. Daddam
- Cardiovascular and Mitochondrial Related Disease Research Center, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical FoundationHualienTaiwan
| | - Tsung‐Jung Ho
- Department of Chinese MedicineHualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Tzu Chi UniversityHualienTaiwan
- Integration Center of Traditional Chinese and Modern Medicine, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical FoundationHualienTaiwan
| | | | - Marthandam Asokan Shibu
- Cardiovascular and Mitochondrial Related Disease Research Center, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical FoundationHualienTaiwan
| | - Chih‐Yang Huang
- Cardiovascular and Mitochondrial Related Disease Research Center, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical FoundationHualienTaiwan
- Graduate Institute of Biomedical Sciences, China Medical UniversityTaichungTaiwan
- Department of Medical ResearchChina Medical University Hospital, China Medical UniversityTaichungTaiwan
- Department of BiotechnologyAsia UniversityTaichungTaiwan
- Center of General Education, Buddhist Tzu Chi Medical FoundationTzu Chi University of Science and TechnologyHualienTaiwan
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15
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Liu J, Chen M, Ma L, Dang X, Du G. LncRNA GAS5 Suppresses the Proliferation and Invasion of Osteosarcoma Cells via the miR-23a-3p/PTEN/PI3K/AKT Pathway. Cell Transplant 2021; 29:963689720953093. [PMID: 33121268 PMCID: PMC7784500 DOI: 10.1177/0963689720953093] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Accumulating evidence has shown that long noncoding RNA GAS5 is a well-known tumor suppressor in the pathogenesis of a variety of human cancers. However, the detailed role of GAS5 in osteosarcoma is still largely unclear. In this study, we found that GAS5 was downregulated in human osteosarcoma tissues and cell lines compared with matched adjacent tissues and normal osteoblast cells. Overexpression of GAS5 could significantly suppress the growth and invasion of osteosarcoma cells, while downregulation of GAS5 promoted cell proliferation and invasion. We confirmed that GAS5 could directly bind with miR-23a-3p by using luciferase reporter gene and RNA immunoprecipitation and pull-down assay. Downregulation of miR-23a-3p repressed cell proliferation and invasion. Overexpression of miR-23a-3p counterbalanced the inhibition effect of GAS5 on cell proliferation and invasion. Further studies indicated that overexpression of GAS5 inhibited cell proliferation and metastasis by regulating phosphatase and tensin homolog (PTEN). PTEN was authenticated as a target of miR-23a-3p. Upregulation of GAS5 or silence of miR-23a-3p increased the level of PTEN, while downregulation of GAS5 or overexpression of miR-23a-3p suppressed the expression of PTEN. In addition, overexpression of GAS5 could neutralize the effect of downregulating PTEN on osteosarcoma cell functions. We proved that GAS5 regulated the viability and invasion of osteosarcoma cells through the PI3K/AKT pathway. Moreover, overexpression of GAS5 could inhibit tumor growth in a xenograft nude mouse model in vivo. In summary, GAS5 functions as a competing endogenous RNA, sponging miR-23a-3p, to promote PTEN expression and suppress cell growth and invasion in osteosarcoma by regulating the PI3K/AKT pathway.
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Affiliation(s)
- Jianmin Liu
- Department of Emergency Surgery, Shaanxi Provincial People's Hospital (Affiliated Hospital of Xi'an Medical University), Xi'an, China
| | - Ming Chen
- Department of Orthopedics, Shaanxi Provincial People's Hospital (Affiliated Hospital of Xi'an Medical University), Xi'an, China
| | - Longyang Ma
- Department of Emergency Surgery, Shaanxi Provincial People's Hospital (Affiliated Hospital of Xi'an Medical University), Xi'an, China
| | - Xingbo Dang
- Department of Emergency Surgery, Shaanxi Provincial People's Hospital (Affiliated Hospital of Xi'an Medical University), Xi'an, China
| | - Gongliang Du
- Department of Emergency Surgery, Shaanxi Provincial People's Hospital (Affiliated Hospital of Xi'an Medical University), Xi'an, China
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Meng Q, Yang P, Lu Y. MicroRNA-410 serves as a candidate biomarker in hypoxic-ischemic encephalopathy newborns and provides neuroprotection in oxygen-glucose deprivation-injured PC12 and SH-SY5Y cells. Brain Behav 2021; 11:e2293. [PMID: 34331407 PMCID: PMC8413830 DOI: 10.1002/brb3.2293] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Revised: 07/05/2021] [Accepted: 07/06/2021] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND MicroRNA-410 (miR-410) has been found to be deregulated in neonatal hypoxic-ischemic encephalopathy (HIE). However, the clinical significance and biological function of miR-410 remain largely elusive. This study aims to investigate the expression and diagnostic performance of miR-410 in HIE newborns, and explores the neuroprotective effect of miR-410 in an oxygen-glucose deprivation (OGD)-induced cell injury model. METHODS Expression of miR-410 was examined using quantitative real-time PCR, and its diagnostic performance was evaluated using a receiver operating characteristic analysis. We used OGD-injured PC12 and SH-SY5Y cells to construct an in vitro HIE model. The effect of miR-410 on OGD-induced cell injury was analyzed by assessing cell viability and apoptosis. Enzyme-linked immunosorbent assay was used to evaluate inflammation in cell model. A target gene was assessed according to the luciferase reporter assay. RESULTS Serum miR-410 expression was significantly decreased in HIE newborns and OGD-injured cell model. The reduced miR-410 expression served as a biomarker for the diagnosis and progression of HIE. The OGD-induced impaired cell viability, enhanced cell apoptosis, and activated neuroinflammation were abrogated by the overexpression of miR-140 in both PC12 and SH-SY5S cells. Regarding the mechanisms underlying the function of miR-410, phosphatase and tensin homolog (PTEN) was proposed as a direct target of miR-410. CONCLUSION All data revealed that serum downregulated miR-410 in HIE serves as candidate diagnostic biomarker, and that miR-410 exerts a neuroprotective role in OGD-injured cells by improving cell viability and inhibiting cell apoptosis through targeting PTEN.
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Affiliation(s)
- Qinghong Meng
- Department of Neonatology, Weifang People's Hospital, Weifang, Shandong, China
| | - Peipei Yang
- Department of Neonatology, Weifang People's Hospital, Weifang, Shandong, China
| | - Yuanyuan Lu
- Department of Pediatrics, Weifang People's Hospital, Weifang, Shandong, China
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Wu G, Hu J, Zhu H, Wu S, Huang S, Liu Z. Treatment with melatonin ameliorates febrile convulsion via modulating the MEG3/miR‑223/PTEN/AKT signaling pathway. Int J Mol Med 2021; 48:154. [PMID: 34165162 DOI: 10.3892/ijmm.2021.4987] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Accepted: 01/29/2021] [Indexed: 11/06/2022] Open
Abstract
The PTEN/AKT signaling pathway is involved in the pathogenesis of febrile convulsion (FC), a convulsion caused by abnormal electrical activity in the brain. The objective of the present study was to evaluate the therapeutic effect of melatonin (MT) on FC and the according underlying molecular mechanisms. Reverse transcription‑quantitative PCR and western blot analysis were used to explore the effects of MT on the expression levels of MEG3, microRNA (miRNA/miR)‑223, phosphatase and tensin homolog (PTEN) and protein kinase B (AKT). Luciferase assay was performed to verify the downstream targets of MEG3 and miR‑223. An animal model was established to evaluate the effects of MT on the MEG3/miR‑223/PTEN/AKT pathway. TUNEL staining was carried out to assess the effect of MT on neuronal apoptosis. Finally, the duration of seizure/convulsion was recorded to determine the effect of MT on FC. In both cell and animal models, mRNA levels of MEG3 and PTEN increased in the apoptosis group, while treatment with MT decreased the expression levels of MEG3 and PTEN. miR‑223 expression was decreased in the apoptosis group, whereas treatment with MT increased the expression level of miR‑223. Protein levels of PTEN and cleaved caspase‑3 increased in the apoptosis group, whereas treatment with MT decreased the protein level of PTEN. Phosphorylated (p)‑AKT expression was decreased in the apoptosis group and treatment with MT reversed this effect. miR‑223 could directly bind to MEG3, and PTEN was a direct target of miR‑223. MT could decrease the duration of seizure/convulsion. In all experimental groups, treatment with MT could decrease the ratio of β waves, while increasing the ratios of α, θ and δ waves. Therefore, the results from the present study collectively suggested that treatment with MT alleviated FC via the MEG3/miR‑223/PTEN/AKT pathway, which also indicated that MT could be considered as a novel strategy for the treatment of FC disease.
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Affiliation(s)
- Gefei Wu
- Neurology Department, Wuhan Children's Hospital (Wuhan Maternal and Child Healthcare Hospital), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430016, P.R. China
| | - Jiasheng Hu
- Neurology Department, Wuhan Children's Hospital (Wuhan Maternal and Child Healthcare Hospital), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430016, P.R. China
| | - Hongmin Zhu
- Neurology Department, Wuhan Children's Hospital (Wuhan Maternal and Child Healthcare Hospital), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430016, P.R. China
| | - Shuhua Wu
- Neurology Department, Wuhan Children's Hospital (Wuhan Maternal and Child Healthcare Hospital), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430016, P.R. China
| | - Sheng Huang
- Neurology Department, Wuhan Children's Hospital (Wuhan Maternal and Child Healthcare Hospital), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430016, P.R. China
| | - Zhisheng Liu
- Neurology Department, Wuhan Children's Hospital (Wuhan Maternal and Child Healthcare Hospital), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430016, P.R. China
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18
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Wan H, Zhang D, Hu W, Xie Z, Du Q, Xia Q, Wen T, Jia H. Aberrant PTEN, PIK3CA, pMAPK, and TP53 expression in human scalp and face angiosarcoma. Medicine (Baltimore) 2021; 100:e26779. [PMID: 34397726 PMCID: PMC8322557 DOI: 10.1097/md.0000000000026779] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/03/2021] [Accepted: 06/30/2021] [Indexed: 01/04/2023] Open
Abstract
Angiosarcoma is a rare, highly aggressive malignant tumor originating from endothelial cells that line the lumen of blood or lymphatic vessels. The molecular mechanisms of scalp and face angiosarcoma still need to be elucidated. This study aimed to investigate the expression of phosphatase and tensin homolog (PTEN), phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha (PIK3CA), phosphorylated mitogen-activated kinase-like protein (pMAPK), and tumor protein p53 (TP53) in scalp and face angiosarcoma and to assess tumor tissue apoptosis.The expression and intracellular distribution of PTEN, PIK3CA, pMAPK, and TP53 proteins in 21 specimens of human scalp and face angiosarcoma and 16 specimens of human benign hemangioma were evaluated using immunohistochemistry. Tumor cell apoptosis was assessed by terminal deoxyribonucleotide transferase-mediated dUTP nick end-labeling staining.Significantly lower PTEN but higher PIK3CA, pMAPK, and TP53 immunostaining were detected in the angiosarcoma specimens than in the benign hemangioma specimens(P < .01). The angiosarcoma tissues exhibited significantly higher apoptosis indices than the benign hemangioma tissues (P < .01). The positive expression rates of PIK3CA, pMAPK, and TP53 were correlated with the degree of tumor differentiation in the human scalp and face angiosarcoma.The PI3K, MAPK, and TP53 pathways might be involved in angiosarcoma tumorigenesis in humans and may serve as therapeutic targets for the effective treatment of this malignancy.
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Affiliation(s)
- Huiying Wan
- Department of Dermatology, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, Sichuan, China
| | - Dingding Zhang
- Department of Medicine, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, Sichuan, China
- Department of Immunology and Microbiology, North Sichuan Medical College, Nanchong, Sichuan, China
- Department of Immunology, College of Medical Technology, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan, China
| | - Weimin Hu
- Department of Immunology and Microbiology, North Sichuan Medical College, Nanchong, Sichuan, China
| | - Zhen Xie
- Department of Dermatology, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, Sichuan, China
| | - Qiu Du
- Department of Immunology, College of Medical Technology, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan, China
| | - Qiongrong Xia
- Department of Immunology, College of Medical Technology, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan, China
| | - Taishen Wen
- Department of Medicine, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, Sichuan, China
| | - Haiping Jia
- Department of Immunology and Microbiology, North Sichuan Medical College, Nanchong, Sichuan, China
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Chai AP, Chen XF, Xu XS, Zhang N, Li M, Li JN, Zhang L, Zhang D, Zhang X, Mao RR, Ding YQ, Xu L, Zhou QX. A Temporal Activity of CA1 Neurons Underlying Short-Term Memory for Social Recognition Altered in PTEN Mouse Models of Autism Spectrum Disorder. Front Cell Neurosci 2021; 15:699315. [PMID: 34335191 PMCID: PMC8319669 DOI: 10.3389/fncel.2021.699315] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Accepted: 06/21/2021] [Indexed: 11/30/2022] Open
Abstract
Memory-guided social recognition identifies someone from previous encounters or experiences, but the mechanisms of social memory remain unclear. Here, we find that a short-term memory from experiencing a stranger mouse lasting under 30 min interval is essential for subsequent social recognition in mice, but that interval prolonged to hours by replacing the stranger mouse with a familiar littermate. Optogenetic silencing of dorsal CA1 neuronal activity during trials or inter-trial intervals disrupted short-term memory-guided social recognition, without affecting the ability of being sociable or long-term memory-guided social recognition. Postnatal knockdown or knockout of autism spectrum disorder (ASD)-associated phosphatase and tensin homolog (PTEN) gene in dorsal hippocampal CA1 similarly impaired neuronal firing rate in vitro and altered firing pattern during social recognition. These PTEN mice showed deficits in social recognition with stranger mouse rather than littermate and exhibited impairment in T-maze spontaneous alternation task for testing short-term spatial memory. Thus, we suggest that a temporal activity of dorsal CA1 neurons may underlie formation of short-term memory to be critical for organizing subsequent social recognition but that is possibly disrupted in ASD.
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Affiliation(s)
- An-Ping Chai
- Key Laboratory of Animal Models and Human Disease Mechanisms, and Laboratory of Learning and Memory, and KIZ-SU Joint Laboratory of Animal Model and Drug Development, Kunming Institute of Zoology, The Chinese Academy of Sciences, Kunming, China
- The Brain Cognition and Brain Disease Institute, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
- Shenzhen-Hong Kong Institute of Brain Science-Shenzhen Fundamental Research Institutions, Shenzhen, China
| | - Xue-Feng Chen
- Key Laboratory of Animal Models and Human Disease Mechanisms, and Laboratory of Learning and Memory, and KIZ-SU Joint Laboratory of Animal Model and Drug Development, Kunming Institute of Zoology, The Chinese Academy of Sciences, Kunming, China
- School of Life Sciences, Yunnan University, Kunming, China
| | - Xiao-Shan Xu
- Key Laboratory of Animal Models and Human Disease Mechanisms, and Laboratory of Learning and Memory, and KIZ-SU Joint Laboratory of Animal Model and Drug Development, Kunming Institute of Zoology, The Chinese Academy of Sciences, Kunming, China
| | - Na Zhang
- School of Life Sciences, Anhui University, Hefei, China
| | - Meng Li
- Key Laboratory of Animal Models and Human Disease Mechanisms, and Laboratory of Learning and Memory, and KIZ-SU Joint Laboratory of Animal Model and Drug Development, Kunming Institute of Zoology, The Chinese Academy of Sciences, Kunming, China
| | - Jin-Nan Li
- Key Laboratory of Animal Models and Human Disease Mechanisms, and Laboratory of Learning and Memory, and KIZ-SU Joint Laboratory of Animal Model and Drug Development, Kunming Institute of Zoology, The Chinese Academy of Sciences, Kunming, China
| | - Lei Zhang
- Department of Anatomy and Neurobiology, Tongji University School of Medicine, Shanghai, China
| | - Dai Zhang
- Institute of Mental Health, The Sixth Hospital of Peking University, Beijing, China
| | - Xia Zhang
- Department of Cellular and Molecular Medicine, Institute of Mental Health Research at the Royal, University of Ottawa, Ottawa, ON, Canada
- Department of Psychiatry, Institute of Mental Health Research at the Royal, University of Ottawa, Ottawa, ON, Canada
| | - Rong-Rong Mao
- Key Laboratory of Animal Models and Human Disease Mechanisms, and Laboratory of Learning and Memory, and KIZ-SU Joint Laboratory of Animal Model and Drug Development, Kunming Institute of Zoology, The Chinese Academy of Sciences, Kunming, China
| | - Yu-Qiang Ding
- Department of Anatomy and Neurobiology, Tongji University School of Medicine, Shanghai, China
| | - Lin Xu
- Key Laboratory of Animal Models and Human Disease Mechanisms, and Laboratory of Learning and Memory, and KIZ-SU Joint Laboratory of Animal Model and Drug Development, Kunming Institute of Zoology, The Chinese Academy of Sciences, Kunming, China
- School of Life Sciences, Yunnan University, Kunming, China
- CAS Center for Excellence in Brain Science and Intelligence Technology, Shanghai, China
| | - Qi-Xin Zhou
- Key Laboratory of Animal Models and Human Disease Mechanisms, and Laboratory of Learning and Memory, and KIZ-SU Joint Laboratory of Animal Model and Drug Development, Kunming Institute of Zoology, The Chinese Academy of Sciences, Kunming, China
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20
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Hu Y, Hu E, Su X, Chen X, Tao X, Ren X. Molecular mechanism of microRNA-26a regulation of phosphatase and tensin homolog gene in condyloma acuminatum and penile squamous cell carcinoma. J Int Med Res 2021; 49:3000605211014379. [PMID: 34232796 PMCID: PMC8267046 DOI: 10.1177/03000605211014379] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
OBJECTIVE To investigate the expression levels and mechanisms of microRNA (miRNA) 26a (miR-26a) and phosphatase and tensin homolog (PTEN) in patients with human papillomavirus (HPV)-induced condyloma acuminatum (CA) and penile squamous cell carcinoma (PSCC). METHODS Thirty-one patients with HPV-positive CA and 28 with HPV-positive PSCC were included in this retrospective, cross-sectional study. PTEN mRNA and miR-26a levels in lesion tissues, blood, and urine were analyzed by quantitative reverse transcription polymerase chain reaction, and PTEN protein was detected by western blot and enzyme-linked immunosorbent assay. Cell proliferation was assessed by MTT assay. The interaction between miR-26a and PTEN was predicted by bioinformatics analysis and confirmed by dual luciferase reporter assay. RESULTS PTEN mRNA and protein levels were significantly lower and miR-26a levels were significantly higher in all samples from patients with PSCC compared with the CA group. Bioinformatics analysis and luciferase reporter assay confirmed PTEN as a target gene of miR-26a. Up-regulation of miR-26a significantly increased the proliferation of Penl1 PSCC cells. CONCLUSIONS PTEN expression is down-regulated and miR-26a levels are up-regulated in PSCC compared with CA. PTEN is a direct target gene of miR-26a. These results suggest that miR-26a might regulate HPV-positive progression from CA to PSCC through modulating PTEN.
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Affiliation(s)
- Yayu Hu
- Department of Dermatology, Taizhou Municipal Hospital, Taizhou, Zhejiang, China
| | - Enping Hu
- Department of Urology, Taizhou Municipal Hospital, Taizhou, Zhejiang, China
| | - Xiangchuan Su
- Department of Dermatology, Taizhou Municipal Hospital, Taizhou, Zhejiang, China
| | - Xiangen Chen
- Department of Dermatology, Taizhou Municipal Hospital, Taizhou, Zhejiang, China
| | - Xiulin Tao
- Department of Urology, Taizhou Municipal Hospital, Taizhou, Zhejiang, China
| | - Xiaoli Ren
- Department of Dermatology, Taizhou Municipal Hospital, Taizhou, Zhejiang, China
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21
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Yi T, Song Y, Zuo L, Wang S, Miao J. LINC00470 Stimulates Methylation of PTEN to Facilitate the Progression of Endometrial Cancer by Recruiting DNMT3a Through MYC. Front Oncol 2021; 11:646217. [PMID: 34249684 PMCID: PMC8267821 DOI: 10.3389/fonc.2021.646217] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2020] [Accepted: 03/08/2021] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVES Increasing researches emphasize the importance of long non-coding RNAs (lncRNAs) in the development of endometrial cancer (EC). There is wide recognition that LINC00470 is a critical participant in the tumorigenesis of cancers such as gastric cancer and glioblastoma, but its possible effects on EC progression remain to be explored. METHODS We collected EC tissues and cells, where the expression of LINC00470 was determined, and followed by the Kaplan-Meier analysis of EC patient survival. We next examined the effect of LINC00470 and phosphatase and tensin homolog (PTEN) on EC cell migration, invasion, tube formation in vitro, and angiogenesis in mice xenografted with tumor after gain- or loss-of-function treatments. RNA pull-down, Co-IP, and ChIP experiments were performed to analyze the targeting relationships among LINC00470, MYC and DNMT3a. RESULTS LINC00470 was aberrantly upregulated in EC and its high expression correlated to prognosis of EC patients. LINC00470 promoted invasiveness, migration, and angiogenesis of EC cells, and facilitated tumorigenesis and metastasis in vivo, but those effects were reversed by up-regulating PTEN. Functionally, LINC00470 bound to MYC in EC and that LINC00470 stimulated the binding of MYC to DNMT3a, and thus recruited DNMT3a through MYC to promote PTEN methylation. CONCLUSIONS Our findings revealed that LINC00470 stimulated PTEN methylation to inhibit its expression by MYC-induced recruitment of DNMT3a, thus aggravating EC.
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Affiliation(s)
- Tiezhong Yi
- Department of Gynecology, The First Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Yicun Song
- Department of Pathology, The Fourth Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Lingling Zuo
- Department of Obstetrics and Gynecology, Heilongjiang Provincial Hospital, Harbin, China
| | - Siyun Wang
- Department of Gynecology, The First Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Jintian Miao
- Department of Gynecology, The First Affiliated Hospital of Harbin Medical University, Harbin, China
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22
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Lei Y, Yang M, Li H, Xu R, Liu J. miR‑130b regulates PTEN to activate the PI3K/Akt signaling pathway and attenuate oxidative stress‑induced injury in diabetic encephalopathy. Int J Mol Med 2021; 48:141. [PMID: 34080640 PMCID: PMC8175068 DOI: 10.3892/ijmm.2021.4974] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Accepted: 04/29/2021] [Indexed: 12/11/2022] Open
Abstract
Diabetic encephalopathy (DE) is one of the main chronic complications of diabetes, and is characterized by cognitive defects. MicroRNAs (miRNAs/miRs) are widely involved in the development of diabetes-related complications. The present study evaluated the role of miR-130b in DE and investigated its mechanisms of action. PC12 cells and hippocampal cells were exposed to a high glucose environment to induce cell injuries to mimic the in vitro model of DE. Cells were transfected with miR-130b mimic, miR-130b inhibitor and small interfering RNA (si)-phosphatase and tensin homolog (PTEN) to evaluate the protective effect of the miR-130b/PTEN axis against oxidative stress in high glucose-stimulated cells involving Akt activity. Furthermore, the effect of agomir-130b was also assessed on rats with DE. The expression of miR-130b was reduced in the DE models in vivo and in vitro. The administration of miR-130b mimic increased the viability of high glucose-stimulated cells, prevented apoptosis, increased the activity of superoxide dismutase (SOD), decreased the malondialdehyde (MDA) content, activated Akt protein levels and inhibited the mitochondria-mediated apoptotic pathway. The administration of miR-130b inhibitor exerted opposite effects, while si-PTEN reversed the effects of miR-130b inhibitor. In vivo, the administration of agomir-130b attenuated cognitive disorders and neuronal damage, increased SOD activity, reduced the MDA content, activated Akt protein levels and inhibited the mitochondria-mediated apoptosis pathway in rats with DE. On the whole, these results suggest that miR-130b activates the PI3K/Akt signaling pathway to exert protective effects against oxidative stress injury via the regulation of PTEN in rats with DE.
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Affiliation(s)
- Yonghua Lei
- Department of Traditional Chinese Medicine, Henan Provincial People's Hospital, Zhengzhou University People's Hospital, Henan University People's Hospital, Zhengzhou, Henan 450003, P.R. China
| | - Ming Yang
- Department of Traditional Chinese Medicine, Henan Provincial People's Hospital, Zhengzhou University People's Hospital, Henan University People's Hospital, Zhengzhou, Henan 450003, P.R. China
| | - Hong Li
- Department of Endocrinology, Longhua Hospital Shanghai University of Traditional Chinese Medicine, Shanghai 200032, P.R. China
| | - Rongjuan Xu
- Department of Endocrinology, Longhua Hospital Shanghai University of Traditional Chinese Medicine, Shanghai 200032, P.R. China
| | - Junbao Liu
- Department of Traditional Chinese Medicine, Henan Provincial People's Hospital, Zhengzhou University People's Hospital, Henan University People's Hospital, Zhengzhou, Henan 450003, P.R. China
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23
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Zang M, Guo X, Chen M. The role of microRNA-572 in the proliferation and chemotherapeutic treatment of prostate cancer. J Int Med Res 2021; 49:3000605211014363. [PMID: 34044640 PMCID: PMC8168039 DOI: 10.1177/03000605211014363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2021] [Accepted: 04/06/2021] [Indexed: 12/02/2022] Open
Abstract
OBJECTIVE MicroRNAs (miRNAs) regulate prostate tumorigenesis and progression by involving different molecular pathways. In this study, we examined the role of miR-572 in prostate cancer (PCa). METHODS The proliferation rates of LNCaP and PC-3 PCa cells were studied using MTT assays. Transwell migration and Matrigel invasion assays were performed to evaluate cell migration and invasion, respectively. Protein expression levels were examined using western blotting. Docetaxel-induced apoptosis was evaluated by Caspase-Glo3/7 assays. The putative miR-572 binding site in the phosphatase and tensin homolog (PTEN) 3' untranslated region (3' UTR) was assessed with dual-luciferase reporter assays. Additionally, miR-572 expression levels in human PCa tissues were examined by qRT-PCR assays. RESULTS Upregulation of miR-572 promoted proliferation, migration, and invasion of PCa cells. Overexpression of miR-572 decreased sensitivity of PCa cells to docetaxel treatment by reducing docetaxel-induced apoptosis. MiR-572 can regulate migration and invasion in PCa cells. Furthermore, miR-572 could regulate expression of PTEN and p-AKT in PCa cells by directly binding to the PTEN 3' UTR. MiR-572 expression levels were increased in human PCa tissues and associated with PCa stage. CONCLUSIONS miR-572 displayed essential roles in PCa tumor growth and its expression level may be used to predict docetaxel treatment in these tumors.
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Affiliation(s)
- Mingcui Zang
- Department of Hepatobiliary and Pancreatic Surgery, The First Hospital of Jilin University, Changchun City, Jilin Province, China
| | - Xun Guo
- Department of Hepatobiliary and Pancreatic Surgery, The First Hospital of Jilin University, Changchun City, Jilin Province, China
| | - Manqiu Chen
- Department of Hepatobiliary and Pancreatic Surgery, The First Hospital of Jilin University, Changchun City, Jilin Province, China
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24
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Zhang G, Gao X, Zhao X, Wu H, Yan M, Li Y, Zeng H, Ji Z, Guo X. Decitabine inhibits the proliferation of human T-cell acute lymphoblastic leukemia molt4 cells and promotes apoptosis partly by regulating the PI3K/AKT/mTOR pathway. Oncol Lett 2021; 21:340. [PMID: 33747197 PMCID: PMC7967925 DOI: 10.3892/ol.2021.12601] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Accepted: 09/11/2020] [Indexed: 11/30/2022] Open
Abstract
T cell acute lymphoblastic leukemia (T-ALL) is a highly aggressive hematological cancer; however, there is a lack of effective chemotherapeutic or targeted drugs for the treatment of T-ALL. Decitabine is a DNA demethylation agent but it has not been used for T-ALL treatment. Therefore, the present study aimed to assess the inhibitory effect of decitabine on T-ALL molt4 cells and determine its regulatory role in the PI3K/AKT/mTOR pathway. Molt4 cells were stimulated with decitabine in vitro, after which cell proliferation, apoptosis and cell cycle analyses were performed to assess cell viability. Subcellular morphology was observed using transmission electron microscopy. Expression levels of phosphate and tension homology (PTEN), genes involved in the PI3K/AKT/mTOR pathway and the corresponding downstream genes were analyzed using reverse transcription-quantitative PCR and western blotting. The results showed that decitabine induced apoptosis, inhibited proliferation and arrested molt4 cells in the G2 phase. Following decitabine intervention, an increase in the number of lipid droplets, autophagosomes and mitochondrial damage was observed. At concentrations of 1 and 10 µM, decitabine downregulated the expression of PI3K, AKT, mTOR, P70S6 and eukaryotic initiating factor 4E-binding protein 1, which in turn upregulated PTEN expression; however, 50 µM decitabine downregulated PTEN levels. Overall, these results demonstrated that decitabine reduced the viability of molt4 cells partly by inhibiting the PI3K/AKT/mTOR pathway via PTEN, especially at low decitabine concentrations.
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Affiliation(s)
- Gang Zhang
- Department of Hematology, First Affiliated Hospital of Jiaxing University, Jiaxing, Zhejiang 314000, P.R. China
| | - Xiaohui Gao
- Department of Pediatrics, First Affiliated Hospital of Jiaxing University, Jiaxing, Zhejiang 314000, P.R. China
| | - Xiaoyan Zhao
- Department of Hematology, First Affiliated Hospital of Jiaxing University, Jiaxing, Zhejiang 314000, P.R. China
| | - Haibing Wu
- Department of Hematology, First Affiliated Hospital of Jiaxing University, Jiaxing, Zhejiang 314000, P.R. China
| | - Minchao Yan
- Department of Hematology, First Affiliated Hospital of Jiaxing University, Jiaxing, Zhejiang 314000, P.R. China
| | - Yuan Li
- Department of Hematology, First Affiliated Hospital of Jiaxing University, Jiaxing, Zhejiang 314000, P.R. China
| | - Hui Zeng
- Department of Hematology, First Affiliated Hospital of Jiaxing University, Jiaxing, Zhejiang 314000, P.R. China
| | - Zhaoning Ji
- Department of Medical Oncology, The Cancer Center, Yijishan Hospital of Wannan Medical College, Wuhu, Anhui 241001, P.R. China
| | - Xiaojun Guo
- Department of Hematology, First Affiliated Hospital of Jiaxing University, Jiaxing, Zhejiang 314000, P.R. China
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Ding Z, Ogata D, Roszik J, Qin Y, Kim SH, Tetzlaff MT, Lazar AJ, Davies MA, Ekmekcioglu S, Grimm EA. iNOS Associates With Poor Survival in Melanoma: A Role for Nitric Oxide in the PI3K-AKT Pathway Stimulation and PTEN S-Nitrosylation. Front Oncol 2021; 11:631766. [PMID: 33643925 PMCID: PMC7907506 DOI: 10.3389/fonc.2021.631766] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Accepted: 01/11/2021] [Indexed: 01/28/2023] Open
Abstract
We previously showed that inducible nitric oxide synthase (iNOS) protein expression in melanoma tumor cells is associated with poor patient prognosis. Here, we analyzed the association between iNOS and the oncogenic PI3K-AKT pathway. TCGA data show that iNOS and phospho-Akt Ser473 expression were associated significantly only in the subset of tumors with genetically intact PTEN. Employing a stage III melanoma TMA, we showed that iNOS protein presence is significantly associated with shorter survival only in tumors with PTEN protein expression. These findings led to our hypothesis that the iNOS product, nitric oxide (NO), suppresses the function of PTEN and stimulates PI3K-Akt activation. Melanoma cells in response to NO exposure in vitro exhibited enhanced AKT kinase activity and substrate phosphorylation, as well as attenuated PTEN phosphatase activity. Biochemical analysis showed that NO exposure resulted in a post-translationally modified S-Nitrosylation (SNO) PTEN, which was also found in cells expressing iNOS. Our findings provide evidence that NO-rich cancers may exhibit AKT activation due to post-translational inactivation of PTEN. This unique activation of oncogenic pathway under nitrosative stress may contribute to the pathogenesis of iNOS in melanoma. Significance: Our study shows that iNOS expression is associated with increased PI3K-AKT signaling and worse clinical outcomes in melanoma patients with wt (intact) PTEN. Mutated PTEN is already inactivated. We also demonstrate that NO activates the PI3K-AKT pathway by suppressing PTEN suppressor function concurrent with the formation of PTEN-SNO. This discovery provides insight into the consequences of inflammatory NO produced in human melanoma and microenvironmental cells. It suggests that NO-driven modification provides a marker of PTEN inactivation, and represents a plausible mechanism of tumor suppressor inactivation in iNOS expressing subset of cancers.
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Affiliation(s)
- Zhen Ding
- Department of Melanoma Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Dai Ogata
- Department of Melanoma Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States.,Department of Dermatologic Oncology, National Cancer Center Hospital, Tokyo, Japan
| | - Jason Roszik
- Department of Melanoma Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States.,Department of Genomic Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Yong Qin
- Department of Melanoma Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States.,Department of Pharmaceutical Sciences, School of Pharmacy, The University of Texas at El Paso, El Paso, TX, United States
| | - Sun-Hee Kim
- Department of Melanoma Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Michael T Tetzlaff
- Department of Dermatopathology and Oral Pathology, University of California San Francisco, San Francisco, CA, United States.,Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Alexander J Lazar
- Department of Genomic Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX, United States.,Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Michael A Davies
- Department of Melanoma Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Suhendan Ekmekcioglu
- Department of Melanoma Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Elizabeth A Grimm
- Department of Melanoma Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
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Zhao Z, Zhang J. Lower Expression of miR-26a in PBMCs Indicates the Occurrence of Early-Onset Neonatal Sepsis and Is Partly Mediated by the Upregulation of PTEN. Front Pediatr 2021; 9:678205. [PMID: 34504813 PMCID: PMC8422988 DOI: 10.3389/fped.2021.678205] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Accepted: 07/16/2021] [Indexed: 11/13/2022] Open
Abstract
Aim: It is difficult to identify neonatal sepsis early due to the lack of specific markers. The aim of the present study was to explore whether miR-26a expression in peripheral blood mononuclear cells (PBMCs) could be used as a diagnostic marker of the disease and whether phosphatase and tensin homolog (PTEN) was involved in suppressing miR-26a expression. Methods: A total of 51 early-onset septic newborns and 102 healthy newborns were included. Blood specimens were collected from septic newborns at the time of clinical diagnosis (baseline) and again between 72 and 96 h after birth. Blood specimens were collected from healthy newborns on admission. The expressions of miR-26a and PTEN in PBMCs were measured using real-time quantitative PCR (RT-qPCR). Other data, including hemoculture, were collected from medical records. Results: In septic newborns with and without a positive hemoculture, a lower baseline level of miR-26a in PBMCs was associated with a higher risk of disease. Additionally, at baseline, there was a certain linear relationship between the levels of miR-26a and two serological inflammatory markers (i.e., white blood cell count and C-reactive protein level) in septic newborns. In addition, the baseline expressions of miR-26a and PTEN showed a reverse linear relationship. Compared with those at baseline, the expression of miR-26a was higher and the expression of PTEN was lower in septic newborns starting at 72 h after birth. Conclusion: A lower baseline miR-26a expression in PBMCs indicated the occurrence of early-onset neonatal sepsis, and a reduced miR-26a expression might be partly related to the inflammatory process and PTEN upregulation.
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Affiliation(s)
- Ziyan Zhao
- Department of Pediatrics, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, China
| | - Jiajie Zhang
- Department of Pediatrics, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, China
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27
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Redenbaugh V, Coulter T. Disorders Related to PI3Kδ Hyperactivation: Characterizing the Clinical and Immunological Features of Activated PI3-Kinase Delta Syndromes. Front Pediatr 2021; 9:702872. [PMID: 34422726 PMCID: PMC8374435 DOI: 10.3389/fped.2021.702872] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Accepted: 06/28/2021] [Indexed: 11/28/2022] Open
Abstract
Phosphoinositide-3-kinase δ (PI3Kδ) is found in immune cells and is part of the PI3K/AKT/mTOR/S6K signalling pathway essential to cell survival, growth and differentiation. Hyperactivation of PI3Kδ enzyme results in Activated PI3-kinase delta syndrome (APDS). This childhood onset, autosomal dominant, combined immunodeficiency, is caused by heterozygous gain of function (GOF) mutations in PIK3CD (encodes PI3Kδ catalytic subunit p110δ), mutations in PIK3R1 (encodes PI3Kδ regulatory subunit p85α) or LOF mutations in PTEN (terminates PI3Kδ signalling) leading to APDS1, APDS2 and APDS-Like (APDS-L), respectively. APDS was initially described in 2013 and over 285 cases have now been reported. Prompt diagnosis of APDS is beneficial as targeted pharmacological therapies such as sirolimus and potentially PI3Kδ inhibitors can be administered. In this review, we provide an update on the clinical and laboratory features of this primary immunodeficiency. We discuss the common manifestations such as sinopulmonary infections, bronchiectasis, lymphoproliferation, susceptibility to herpesvirus, malignancy, as well as more rare non-immune features such as short stature and neurodevelopmental abnormalities. Laboratory characteristics, such as antibody deficiency and B cell and T cell, phenotypes are also summarised.
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Affiliation(s)
- Vyanka Redenbaugh
- Regional Immunology Services of Northern Ireland, Belfast Health and Social Care Trust, Belfast, United Kingdom.,Mayo Clinic, Rochester, MN, United States
| | - Tanya Coulter
- Regional Immunology Services of Northern Ireland, Belfast Health and Social Care Trust, Belfast, United Kingdom
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28
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Feng P, Li Z, Li Y, Zhang Y. Phosphatase and Tensin Homolog Mutation in Immune Cell Infiltration and Clinicopathological Features of Low-Grade Gliomas. Front Mol Biosci 2020; 7:562416. [PMID: 33363203 PMCID: PMC7758504 DOI: 10.3389/fmolb.2020.562416] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Accepted: 11/20/2020] [Indexed: 11/28/2022] Open
Abstract
The mutation of phosphatase and tensin homolog (PTEN) genes frequently occur in low-grade gliomas (LGGs) and are deeply associated with a poor prognosis and survival rate. In order to identify the crucial signaling pathways and genes associated with the PTEN mutation, we performed bioinformatics analysis on the RNA sequencing results, which were obtained from The Cancer Genome Atlas database. A total of 352 genes were identified as differentially expressed genes (DEGs). The gene ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis suggested that the DEGs were significantly enriched in categories associated with cell division and multiple metabolic progressions. The histological stage was significantly associated with PTEN expression levels. In addition, the PTEN mutation was associated with an abundance of B cells, neutrophils, macrophages, dendritic cells, and CD8+ T cells during tumor infiltration. The results showed that patients with LGGs harboring the PTEN mutation had a poor prognosis and more serious immune cell infiltration occurred depending on the mRNA expression level. These results demonstrated that multiple genes and signaling pathways play a key role in LGG from low grade to high grade, and are associated with PTEN mutations. In this study, we outlined an approach to assess the influence of PTEN mutations on prognosis, overall survival, and messenger RNA (mRNA) expression. Our results provided alternative strategies for the personalized treatment of patients with LGGs harboring the PTEN mutation.
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Affiliation(s)
- Peng Feng
- Xi'an Medical University, Xi'an, China
| | - Zhenqing Li
- Research Center of Clinical Medicine, Affiliated Hospital of Nantong University, Nantong, China
| | - Yuchen Li
- Hengyang Medical College, University of South China, Hengyang, China
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29
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Zhang Y, Wang J, Yang B, Qiao R, Li A, Guo H, Ding J, Li H, Ye H, Wu D, Cui L, Yang S. Transfer of MicroRNA-216a-5p From Exosomes Secreted by Human Urine-Derived Stem Cells Reduces Renal Ischemia/Reperfusion Injury. Front Cell Dev Biol 2020; 8:610587. [PMID: 33415108 PMCID: PMC7783217 DOI: 10.3389/fcell.2020.610587] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2020] [Accepted: 11/23/2020] [Indexed: 12/19/2022] Open
Abstract
Human urine-derived stem cells (USCs) protect rats against kidney ischemia/reperfusion (I/R) injury. Here we investigated the role of USCs exosomes (USCs-Exos) in protecting tubular endothelial cells and miRNA transfer in the kidney. Human USCs and USCs-Exos were isolated and verified by morphology and specific biomarkers. USC-Exos played a protective role in human proximal tubular epithelial cells (HK-2) exposed to hypoxia/reoxygenation (H/R). USCs-Exos were rich in miR-216a-5p, which targeted phosphatase and tensin homolog (PTEN) and regulated cell apoptosis through the Akt pathway. In HK-2 cells exposed to H/R, incubation with USC-Exos increased miR-216-5p, decreased PTEN levels, and stimulated Akt phosphorylation. Exposure of hypoxic HK-2 cells to USCs-Exos pretreated with anti-miR-216a-5p can prevent the increase of miR-216-5p and Akt phosphorylation levels, restore PTEN expression, and promote apoptosis. The dual-luciferase reported gene assay in HK-2 cells confirmed that miR-216a-5p targeted PTEN. In rats with I/R injury, intravenous infusion of USCs-Exos can effectively induce apoptosis suppression and functional protection, which is associated with decreased PTEN. Infusion of exosomes from anti-miR-216a-5p-transfected USCs weakened the protective effect in the I/R model. Therefore, USCs-Exos can reduce renal I/R injury by transferring miR-216a-5p targeting PTEN. Potentially, USCs-Exos rich in miR-216a-5p can serve as a promising therapeutic option for AKI.
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Affiliation(s)
- Yinmei Zhang
- Department of Laboratory Medicine, Peking University Third Hospital, Beijing, China
| | - Junxiong Wang
- Department of Gastroenterology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Boxin Yang
- Department of Laboratory Medicine, Peking University Third Hospital, Beijing, China
| | - Rui Qiao
- Department of Laboratory Medicine, Peking University Third Hospital, Beijing, China
| | - Aiwei Li
- Department of Laboratory Medicine, Peking University Third Hospital, Beijing, China
| | - Han Guo
- Department of Laboratory Medicine, Peking University Third Hospital, Beijing, China
| | - Jie Ding
- Department of Laboratory Medicine, Peking University Third Hospital, Beijing, China
| | - Hui Li
- Department of Laboratory Medicine, Peking University Third Hospital, Beijing, China
| | - Hong Ye
- Department of Laboratory Medicine, Peking University Third Hospital, Beijing, China
| | - Di Wu
- Department of Laboratory Medicine, Peking University Third Hospital, Beijing, China
| | - Liyan Cui
- Department of Laboratory Medicine, Peking University Third Hospital, Beijing, China
| | - Shuo Yang
- Department of Laboratory Medicine, Peking University Third Hospital, Beijing, China
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30
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Nunes-Souza E, Silveira ME, Mendes MC, Nagashima S, de Paula CBV, da Silva GGVC, Barbosa GS, Martins JB, de Noronha L, Lenzi L, Barbosa JRS, Donin RDF, de Moura JF, Custódio G, Machado-Souza C, Lalli E, de Figueiredo BC. From adrenarche to aging of adrenal zona reticularis: precocious female adrenopause onset. Endocr Connect 2020; 9:1212-1220. [PMID: 33112833 PMCID: PMC7774755 DOI: 10.1530/ec-20-0416] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Accepted: 10/14/2020] [Indexed: 01/10/2023]
Abstract
OBJECTIVE Adaptive changes in DHEA and sulfated-DHEA (DHEAS) production from adrenal zona reticularis (ZR) have been observed in normal and pathological conditions. Here we used three different cohorts to assess timing differences in DHEAS blood level changes and characterize the relationship between early blood DHEAS reduction and cell number changes in women ZR. MATERIALS AND METHODS DHEAS plasma samples (n = 463) were analyzed in 166 healthy prepubertal girls before pubarche (<9 years) and 324 serum samples from 268 adult females (31.9-83.8 years) without conditions affecting steroidogenesis. Guided by DHEAS blood levels reduction rate, we selected the age range for ZR cell counting using DHEA/DHEAS and phosphatase and tensin homolog (PTEN), tumor suppressor and cell stress marker, immunostaining, and hematoxylin stained nuclei of 14 post-mortem adrenal glands. RESULTS We confirmed that overweight girls exhibited higher and earlier DHEAS levels and no difference was found compared with the average European and South American girls with a similar body mass index (BMI). Adrenopause onset threshold (AOT) defined as DHEAS blood levels <2040 nmol/L was identified in >35% of the females >40 years old and associated with significantly reduced ZR cell number (based on PTEN and hematoxylin signals). ZR cell loss may in part account for lower DHEA/DHEAS expression, but most cells remain alive with lower DHEA/DHEAS biosynthesis. CONCLUSION The timely relation between significant reduction of blood DHEAS levels and decreased ZR cell number at the beginning of the 40s suggests that adrenopause is an additional burden for a significant number of middle-aged women, and may become an emergent problem associated with further sex steroids reduction during the menopausal transition.
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Affiliation(s)
- Emanuelle Nunes-Souza
- Pelé Pequeno Príncipe Research Institute, Água Verde, Curitiba, Parana, Brazil
- Faculdades Pequeno Príncipe, Rebouças, Curitiba, Parana, Brazil
- Centro de Genética Molecular e Pesquisa do Câncer em Crianças (CEGEMPAC) at Universidade Federal do Paraná, Agostinho Leão Jr., Glória, Curitiba, Parana, Brazil
| | - Mônica Evelise Silveira
- Laboratório Central de Análises Clínicas, Hospital de Clínicas, Universidade Federal do Paraná, Centro, Curitiba, Paraná, Brazil
| | - Monalisa Castilho Mendes
- Pelé Pequeno Príncipe Research Institute, Água Verde, Curitiba, Parana, Brazil
- Faculdades Pequeno Príncipe, Rebouças, Curitiba, Parana, Brazil
- Centro de Genética Molecular e Pesquisa do Câncer em Crianças (CEGEMPAC) at Universidade Federal do Paraná, Agostinho Leão Jr., Glória, Curitiba, Parana, Brazil
| | - Seigo Nagashima
- Serviço de Anatomia Patológica, Hospital de Clínicas, Universidade Federal do Paraná, General Carneiro, Alto da Glória, Curitiba, Parana, Brazil
- Departamento de Medicina, PUC-PR, Prado Velho, Curitiba, Parana, Brazil
| | - Caroline Busatta Vaz de Paula
- Serviço de Anatomia Patológica, Hospital de Clínicas, Universidade Federal do Paraná, General Carneiro, Alto da Glória, Curitiba, Parana, Brazil
- Departamento de Medicina, PUC-PR, Prado Velho, Curitiba, Parana, Brazil
| | - Guilherme Guilherme Vieira Cavalcante da Silva
- Serviço de Anatomia Patológica, Hospital de Clínicas, Universidade Federal do Paraná, General Carneiro, Alto da Glória, Curitiba, Parana, Brazil
- Departamento de Medicina, PUC-PR, Prado Velho, Curitiba, Parana, Brazil
| | - Giovanna Silva Barbosa
- Serviço de Anatomia Patológica, Hospital de Clínicas, Universidade Federal do Paraná, General Carneiro, Alto da Glória, Curitiba, Parana, Brazil
- Departamento de Medicina, PUC-PR, Prado Velho, Curitiba, Parana, Brazil
| | - Julia Belgrowicz Martins
- Pelé Pequeno Príncipe Research Institute, Água Verde, Curitiba, Parana, Brazil
- Faculdades Pequeno Príncipe, Rebouças, Curitiba, Parana, Brazil
| | - Lúcia de Noronha
- Serviço de Anatomia Patológica, Hospital de Clínicas, Universidade Federal do Paraná, General Carneiro, Alto da Glória, Curitiba, Parana, Brazil
- Departamento de Medicina, PUC-PR, Prado Velho, Curitiba, Parana, Brazil
| | - Luana Lenzi
- Departamento de Análises Clínicas, Universidade Federal do Paraná, Curitiba, Paraná, Brazil
| | - José Renato Sales Barbosa
- Pelé Pequeno Príncipe Research Institute, Água Verde, Curitiba, Parana, Brazil
- Centro de Genética Molecular e Pesquisa do Câncer em Crianças (CEGEMPAC) at Universidade Federal do Paraná, Agostinho Leão Jr., Glória, Curitiba, Parana, Brazil
| | - Rayssa Danilow Fachin Donin
- Centro de Genética Molecular e Pesquisa do Câncer em Crianças (CEGEMPAC) at Universidade Federal do Paraná, Agostinho Leão Jr., Glória, Curitiba, Parana, Brazil
| | - Juliana Ferreira de Moura
- Pós Graduação em Microbiologia, Parasitologia e Patologia, Departamento de Patologia Básica – UFPR, Curitiba, Brazil
| | - Gislaine Custódio
- Faculdades Pequeno Príncipe, Rebouças, Curitiba, Parana, Brazil
- Laboratório Central de Análises Clínicas, Hospital de Clínicas, Universidade Federal do Paraná, Centro, Curitiba, Paraná, Brazil
| | - Cleber Machado-Souza
- Pelé Pequeno Príncipe Research Institute, Água Verde, Curitiba, Parana, Brazil
- Faculdades Pequeno Príncipe, Rebouças, Curitiba, Parana, Brazil
- Centro de Genética Molecular e Pesquisa do Câncer em Crianças (CEGEMPAC) at Universidade Federal do Paraná, Agostinho Leão Jr., Glória, Curitiba, Parana, Brazil
| | - Enzo Lalli
- Institut de Pharmacologie Moléculaire et Cellulaire CNRS, Sophia Antipolis, Valbonne, France
| | - Bonald Cavalcante de Figueiredo
- Pelé Pequeno Príncipe Research Institute, Água Verde, Curitiba, Parana, Brazil
- Faculdades Pequeno Príncipe, Rebouças, Curitiba, Parana, Brazil
- Centro de Genética Molecular e Pesquisa do Câncer em Crianças (CEGEMPAC) at Universidade Federal do Paraná, Agostinho Leão Jr., Glória, Curitiba, Parana, Brazil
- Departamento de Saúde Coletiva, Universidade Federal do Paraná, Curitiba, Paraná, Brazil
- Correspondence should be addressed to B C de Figueiredo:
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Chen S, He Z, Zhu C, Liu Y, Li L, Deng L, Wang J, Yu C, Sun C. TRIM37 Mediates Chemoresistance and Maintenance of Stemness in Pancreatic Cancer Cells via Ubiquitination of PTEN and Activation of the AKT-GSK-3β-β-Catenin Signaling Pathway. Front Oncol 2020; 10:554787. [PMID: 33194618 PMCID: PMC7651862 DOI: 10.3389/fonc.2020.554787] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Accepted: 09/24/2020] [Indexed: 12/13/2022] Open
Abstract
Purpose The tripartite motif-containing family member TRIM37 is involved in a number of important biological and pathological processes, and it has recently been shown to be an essential regulator of protein ubiquitination and a contributor to tumorigenesis. We previously showed that TRIM37 is overexpressed in and promotes the proliferation and invasion of pancreatic cancer (PC). Methods Sphere formation, flow cytometric, qRT-PCR, western blot, colony formation, EdU incorporation, mouse xenograft model, TUNEL and IHC assays were performed to detect the role of TRIM37 in stemness and chemoresistance of PC in vitro and in vivo. Bioinformatics analysis and dual-luciferase reporter assays were used to determine which intracellular pathways might mediate the effects of TRIM37 in PC cells. Immunofluorescent(IF) staining, co-immunoprecipitation(CO-IP), protein stability and ubiquitination assays were performed to investigate the relationship between TRIM37 and PTEN. Results TRIM37 modulates the ubiquitination and degradation of the tumor suppressor phosphatase and tensin homolog (PTEN), which negatively regulates the AKT–GSK-3β–β-catenin signaling pathway, thereby sustaining aberrant activation of PC cells. High expression of TRIM37 combined with low expression of PTEN correlates with poor survival of PC patients. Conclusions Collectively, our results suggest that inhibition of the TRIM37–AKT–GSK-3β–β-catenin axis may be a promising strategy for treatment of PC.
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Affiliation(s)
- Shiyu Chen
- School of Basic Medical Sciences, Guizhou Medical University, Guiyang, China.,Department of Hepatobiliary Surgery, The Affiliated Hospital of Guizhou Medical University, Guiyang, China.,Guizhou Provincial Institute of Hepatobiliary, Pancreatic and Splenic Diseases, Guiyang, China.,Key Laboratory of Liver, Gallbladder, Pancreas and Spleen of Guizhou Medical University, Guiyang, China
| | - Zhiwei He
- Department of Hepatobiliary Surgery, The Affiliated Hospital of Guizhou Medical University, Guiyang, China.,Guizhou Provincial Institute of Hepatobiliary, Pancreatic and Splenic Diseases, Guiyang, China.,Key Laboratory of Liver, Gallbladder, Pancreas and Spleen of Guizhou Medical University, Guiyang, China
| | - Changhao Zhu
- School of Basic Medical Sciences, Guizhou Medical University, Guiyang, China.,Department of Hepatobiliary Surgery, The Affiliated Hospital of Guizhou Medical University, Guiyang, China.,Guizhou Provincial Institute of Hepatobiliary, Pancreatic and Splenic Diseases, Guiyang, China.,Key Laboratory of Liver, Gallbladder, Pancreas and Spleen of Guizhou Medical University, Guiyang, China
| | - Yanqing Liu
- School of Basic Medical Sciences, Guizhou Medical University, Guiyang, China.,Department of Hepatobiliary Surgery, The Affiliated Hospital of Guizhou Medical University, Guiyang, China.,Guizhou Provincial Institute of Hepatobiliary, Pancreatic and Splenic Diseases, Guiyang, China.,Key Laboratory of Liver, Gallbladder, Pancreas and Spleen of Guizhou Medical University, Guiyang, China
| | - Lin Li
- Department of Hepatobiliary Surgery, The Affiliated Hospital of Guizhou Medical University, Guiyang, China.,Guizhou Provincial Institute of Hepatobiliary, Pancreatic and Splenic Diseases, Guiyang, China.,Key Laboratory of Liver, Gallbladder, Pancreas and Spleen of Guizhou Medical University, Guiyang, China
| | - Lu Deng
- Department of Hepatobiliary Surgery, The Affiliated Hospital of Guizhou Medical University, Guiyang, China.,Guizhou Provincial Institute of Hepatobiliary, Pancreatic and Splenic Diseases, Guiyang, China.,Key Laboratory of Liver, Gallbladder, Pancreas and Spleen of Guizhou Medical University, Guiyang, China
| | - Jun Wang
- Reproductive Medicine Center, The Affiliated Hospital of Guizhou Medical University, Guiyang, China
| | - Chao Yu
- Department of Hepatobiliary Surgery, The Affiliated Hospital of Guizhou Medical University, Guiyang, China.,Guizhou Provincial Institute of Hepatobiliary, Pancreatic and Splenic Diseases, Guiyang, China.,Key Laboratory of Liver, Gallbladder, Pancreas and Spleen of Guizhou Medical University, Guiyang, China
| | - Chengyi Sun
- Department of Hepatobiliary Surgery, The Affiliated Hospital of Guizhou Medical University, Guiyang, China.,Guizhou Provincial Institute of Hepatobiliary, Pancreatic and Splenic Diseases, Guiyang, China.,Key Laboratory of Liver, Gallbladder, Pancreas and Spleen of Guizhou Medical University, Guiyang, China
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Fu Y, Wang Y, Bi K, Yang L, Sun Y, Li B, Liu Z, Zhang F, Li Y, Feng C, Bi Z. MicroRNA-208a-3p promotes osteosarcoma progression via targeting PTEN. Exp Ther Med 2020; 20:255. [PMID: 33178353 PMCID: PMC7651880 DOI: 10.3892/etm.2020.9385] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Accepted: 06/11/2020] [Indexed: 12/17/2022] Open
Abstract
Osteosarcoma (OS) is a malignant bone tumor with a poor prognosis. Accumulated evidence has suggested that microRNAs (miRNAs/miRs) may function as either oncogenes or tumor suppressors, which are associated with tumorigenesis and the progression of different types of cancer. In the present study, the role of miR-208a-3p in OS was investigated. The expression levels of miR-208a-3p in OS tissues and cell lines were determined via reverse transcription-quantitative PCR (RT-qPCR). MTT and colony formation assays were performed to verify the proliferation rate of OS cells. In addition, the effects of miR-208a-3p on the migration and invasion of OS cells were revealed using wound-healing and Transwell assays, respectively. Furthermore, the association between miR-208a-3p and phosphatase and tensin homolog (PTEN) 3'-untranslated region was determined via luciferase reporter assays, western blot and RT-qPCR analysis. The results indicated that miR-208a-3p was upregulated in OS tissues and cell lines compared with adjacent normal tissues and human osteoblastic cells, respectively. miR-208a-3p overexpression promoted and miR-208a-3p knockdown inhibited OS cells proliferation and metastatic potential. Additionally, PTEN was validated as a direct target of miR-208a-3p and its expression was negatively associate with that of miR-208a-3p in OS cells. Taken together, these results may suggest that miR-208a-3p promoted OS cells proliferation and metastatic potential via targeting PTEN. Therefore, miR-208a-3p may be considered as a diagnostic biomarker for OS.
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Affiliation(s)
- Yutuo Fu
- Department of Orthopedics, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150000, P.R. China.,Department of Orthopedics, Heilongjiang Provincial Hospital, Harbin, Heilongjiang 150000, P.R. China
| | - Yan Wang
- Department of Orthopedics, Heilongjiang Provincial Hospital, Harbin, Heilongjiang 150000, P.R. China
| | - Ke Bi
- Department of Orthopedics, Heilongjiang Provincial Hospital, Harbin, Heilongjiang 150000, P.R. China
| | - Lei Yang
- Department of Orthopedics, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150000, P.R. China
| | - Yi Sun
- Department of Orthopedics, The Second Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150000, P.R. China
| | - Boyuan Li
- Department of Orthopedics, Heilongjiang Provincial Hospital, Harbin, Heilongjiang 150000, P.R. China
| | - Zhenzhong Liu
- Department of Orthopedics, Heilongjiang Provincial Hospital, Harbin, Heilongjiang 150000, P.R. China
| | - Fulin Zhang
- Department of Orthopedics, Heilongjiang Provincial Hospital, Harbin, Heilongjiang 150000, P.R. China
| | - Yuan Li
- Department of Pharmacology, The State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, College of Pharmacy, Harbin Medical University, Harbin, Heilongjiang 150000, P.R. China
| | - Chao Feng
- Department of Pharmacology, The State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, College of Pharmacy, Harbin Medical University, Harbin, Heilongjiang 150000, P.R. China
| | - Zhenggang Bi
- Department of Orthopedics, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150000, P.R. China
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Chen Y, Yang JL, Xue ZZ, Cai QC, Hou C, Li HJ, Zhao LX, Zhang Y, Gao CW, Cong L, Wang TZ, Chen DM, Li GS, Luo SQ, Yao Q, Yang CJ, Zhu QS, Cao CH. Effects and mechanism of microRNA‑218 against lung cancer. Mol Med Rep 2020; 23:28. [PMID: 33179084 PMCID: PMC7673340 DOI: 10.3892/mmr.2020.11666] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Accepted: 07/08/2020] [Indexed: 12/22/2022] Open
Abstract
Lung cancer is the most prevalent and observed type of cancer in Xuanwei County, Yunnan, South China. Lung cancer in this area is called Xuanwei lung cancer. However, its pathogenesis remains largely unknown. To date, a number of studies have shown that microRNA (miR)‑218 functions as a tumor suppressor in multiple types of cancer. However, the role of miR‑218 and its regulatory gene network in Xuanwei lung cancer have yet to be investigated. The current study identified that the expression levels of miR‑218 in XWLC‑05 cells were markedly lower compared with those in immortalized lung epithelial BEAS‑2B cells. The present study also demonstrated that overexpression of miR‑218 could decrease cell proliferation, invasion, viability and migration in Xuanwei lung cancer cell line XWLC‑05 and NSCLC cell line NCI‑H157. Additionally, the results revealed that overexpression of miR‑218 could induce XWLC‑05 and NCI‑H157 cell apoptosis by arresting the cell cycle at G2/M phase. Finally, the present study demonstrated that overexpression of miR‑218 could lead to a significant increase in phosphatase and tensin homolog (<em>PTEN</em>) and YY1 transcription factor (<em>YY1</em>), and a decrease in B‑cell lymphoma 2 (<em>BCL‑2</em>) and BMI1 proto‑oncogene, polycomb ring finger (<em>BMI‑1</em>) at the mRNA and protein level in XWLC‑05 and NCI‑H157 cell lines. However, we did not observe any remarkable difference in the roles of miR‑218 and miR‑218‑mediated regulation of <em>BCL‑2</em>, <em>BMI‑1</em>, <em>PTEN</em> and <em>YY1</em> expression in the progression of Xuanwei lung cancer. In conclusion, miR‑218 could simultaneously suppress cell proliferation and tumor invasiveness and induce cell apoptosis by increasing <em>PTEN</em> and <em>YY1</em> expression, while decreasing <em>BCL‑2</em> and <em>BMI‑1</em> in Xuanwei lung cancer. The results demonstrated that miR‑218 might serve a vital role in tumorigenesis and progression of Xuanwei lung cancer and overexpression of miR‑218 may be a novel approach for the treatment of Xuanwei lung cancer.
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Affiliation(s)
- Yan Chen
- School of Life Sciences, Yunnan University, Kunming, Yunnan 650091, P.R. China
| | - Ji-Lin Yang
- The First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650031, P.R. China
| | - Zhen-Zhen Xue
- School of Life Sciences, Yunnan University, Kunming, Yunnan 650091, P.R. China
| | - Qiu-Chen Cai
- School of Life Sciences, Yunnan University, Kunming, Yunnan 650091, P.R. China
| | - Chun Hou
- School of Life Sciences, Yunnan University, Kunming, Yunnan 650091, P.R. China
| | - Hong-Juan Li
- School of Life Sciences, Yunnan University, Kunming, Yunnan 650091, P.R. China
| | - Liu-Xin Zhao
- School of Life Sciences, Yunnan University, Kunming, Yunnan 650091, P.R. China
| | - Yin Zhang
- School of Life Sciences, Yunnan University, Kunming, Yunnan 650091, P.R. China
| | - Cheng-Wei Gao
- School of Chemical Science and Technology, Yunnan University, Kunming, Yunnan 650091, P.R. China
| | - Li Cong
- YinMore Biotech Co., Ltd., Kunming, Yunnan 650224, P.R. China
| | - Tian-Zuo Wang
- School of Life Sciences, Yunnan University, Kunming, Yunnan 650091, P.R. China
| | - Dong-Mei Chen
- School of Life Sciences, Yunnan University, Kunming, Yunnan 650091, P.R. China
| | - Guo-Sheng Li
- School of Life Sciences, Yunnan University, Kunming, Yunnan 650091, P.R. China
| | - Shi-Qing Luo
- School of Life Sciences, Yunnan University, Kunming, Yunnan 650091, P.R. China
| | - Qian Yao
- Yunnan Cancer Hospital and The Third Affiliated Hospital of Kunming Medical University and Yunnan Cancer Center, Kunming, Yunnan 650118, P.R. China
| | - Chan-Juan Yang
- YinMore Biotech Co., Ltd., Kunming, Yunnan 650224, P.R. China
| | - Qi-Shun Zhu
- School of Life Sciences, Yunnan University, Kunming, Yunnan 650091, P.R. China
| | - Chuan-Hai Cao
- Byrd Alzheimer's Institute, University of South Florida, Tampa, FL 33613, USA
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Aksan H, Kundaktepe BP, Sayili U, Velidedeoglu M, Simsek G, Koksal S, Gelisgen R, Yaylim I, Uzun H. Circulating miR-155, let-7c, miR-21, and PTEN levels in differential diagnosis and prognosis of idiopathic granulomatous mastitis and breast cancer. Biofactors 2020; 46:955-962. [PMID: 32941675 DOI: 10.1002/biof.1676] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Accepted: 08/06/2020] [Indexed: 12/13/2022]
Abstract
This study investigates whether the circulating miR-155, let-7c, miR-21, and PTEN levels to be used in the differential diagnosis of patients with idiopathic granulomatous mastitis (IGM) and breast cancer (BC). Forty-five patients with BC, 50 patients with IGM, and 48 healthy volunteers were included in the study. Serum miR-21 expression was significantly higher in BC (fold change = 2.42) and IGM group (fold change = 1.33) compared to control (p < .001). Serum miR-155 and let-7c expression levels were significantly lower in both groups compared to the control group (p < .001). miR-21 expression in BC was significantly higher than IGM (fold change = 1.976; p < .001). PTEN levels in BC were significantly higher than IGM (p < .001) and significantly lower than the control group (p < .001); the IGM group was significantly lower than the control group (p < .001). In addition to radiological data, serum miR-21 and PTEN levels may be noninvasive biomarkers that can help differentiate IGM from BC. The results of the study will lead to future studies in the differential diagnosis of IGM and BC.
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Affiliation(s)
- Hulya Aksan
- Department of Molecular Medicine, Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey
- Department of Medical Biochemistry, Faculty of Medicine, Haliç University, Istanbul, Turkey
| | - Berrin Papila Kundaktepe
- Department of General Surgery, Cerrahpasa Faculty of Medicine, Istanbul University - Cerrahpasa, Istanbul, Turkey
| | - Ugurcan Sayili
- Department of Public Health, Cerrahpasa Faculty of Medicine, Istanbul University - Cerrahpasa, Istanbul, Turkey
| | - Mehmet Velidedeoglu
- Department of General Surgery, Cerrahpasa Faculty of Medicine, Istanbul University - Cerrahpasa, Istanbul, Turkey
| | - Gonul Simsek
- Department of Physiology, Cerrahpasa Faculty of Medicine, Istanbul University - Cerrahpasa, Istanbul, Turkey
| | - Selcuk Koksal
- Department of Public Health, Cerrahpasa Faculty of Medicine, Istanbul University - Cerrahpasa, Istanbul, Turkey
| | - Remise Gelisgen
- Department of Medical Biochemistry, Cerrahpasa Faculty of Medicine, Istanbul University - Cerrahpasa, Istanbul, Turkey
| | - Ilhan Yaylim
- Department of Molecular Medicine, Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey
| | - Hafize Uzun
- Department of Medical Biochemistry, Cerrahpasa Faculty of Medicine, Istanbul University - Cerrahpasa, Istanbul, Turkey
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Li W, Guan X, Sun L. Phosphatase and Tensin Homolog (PTEN) of Japanese Flounder-Its Regulation by miRNA and Role in Autophagy, Apoptosis and Pathogen Infection. Int J Mol Sci 2020; 21:E7725. [PMID: 33086544 DOI: 10.3390/ijms21207725] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Revised: 10/14/2020] [Accepted: 10/14/2020] [Indexed: 12/11/2022] Open
Abstract
MicroRNAs (miRNAs) are small non-coding RNAs with important roles in diverse biological processes including immunity. Japanese flounder (Paralichthys olivaceus) is an aquaculture fish species susceptible to the infection of bacterial and viral pathogens including Edwardsiella tarda. In a previous study, pol-miR-novel_547, a novel miRNA of flounder with unknown function, was found to be induced by E. tarda. In the present study, we investigated the regulation and function of pol-miR-novel_547 and its target gene. We found that pol-miR-novel_547 was regulated differently by E. tarda and the viral pathogen megalocytivirus, and pol-miR-novel_547 repressed the expression of PTEN (phosphatase and tensin homolog) of flounder (PoPTEN). PoPTEN is ubiquitously expressed in multiple tissues of flounder and responded to bacterial and viral infections. Interference with PoPTEN expression in flounder cells directly or via pol-miR-novel_547 promoted E. tarda invasion. Consistently, in vivo knockdown of PoPTEN enhanced E. tarda dissemination in flounder tissues, whereas in vivo overexpression of PoPTEN attenuated E. tarda dissemination but facilitated megalocytivirus replication. Further in vitro and in vivo studies showed that PoPTEN affected autophagy activation via the AKT/mTOR pathway and also modulated the process of apoptosis. Together these results reveal for the first time a critical role of fish PTEN and its regulatory miRNA in pathogen infection, autophagy, and apoptosis.
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Zhu H, Du F, Cao C. Restoration of circPSMC3 sensitizes gefitinib-resistant esophageal squamous cell carcinoma cells to gefitinib by regulating miR-10a-5p/PTEN axis. Cell Biol Int 2020; 45:107-116. [PMID: 32997362 DOI: 10.1002/cbin.11473] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 09/21/2020] [Accepted: 09/26/2020] [Indexed: 12/13/2022]
Abstract
Circular RNAs (circRNAs) has been shown to play an important role in the progression of various cancers. However, the function and underlying mechanisms of circRNAs affecting chemotherapy resistance in esophageal squamous cell carcinoma (ESCC) remain largely unknown. In this study, we used gefitinib-resistant (GR) ESCC cells to investigate the function of circPSMC3 and clarify the underlying mechanism in chemotherapy resistance in ESCC. The results suggested that circPSMC3 expression was downregulated, but miR-10a-5p was upregulated in ESCC tissues and cells, as well as in GR ESCC cells. CircPSMC3 overexpression increased the sensitivity of ESCC cells to gefitinib, as indicated by reduced half maximal inhibitory concentration value, increased apoptosis rate and cleaved caspase-3 protein expression. CircPSMC3 directly interacted with miR-10a-5p and inhibited the expression of miR-10a-5p. Phosphatase and tensin homolog (PTEN) was a direct target of miR-10a-5p and circPSMC3 promoted PTEN expression via decreasing miR-10a-5p level. Moreover, the effect of circPSMC3 on resistance of GR ESCC cells to gefitinib was remarkably reduced by restoration of miR-10a-5p and downregultion of PTEN. Taken together, these observations suggested that upregulation of circPSMC3 overcame resistance of GR ESCC cells to gefitinib by modulating the miR-10a-5p/PTEN axis, which provide a new therapeutic strategy for overcoming gefitinib resistance in ESCC.
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Affiliation(s)
- Han Zhu
- Department of Clinical Laboratory, Huaihe Hospital of Henan University, Kaifeng, Henan, China
| | - Fang Du
- Department of Hematology and Oncology, No. 988 Hospital of Joint Logistic Support Force of the Chinese People's Liberation Army, Zhengzhou, Henan, China
| | - Chenghua Cao
- Translational Research Institute, School of Basic Medical Sciences, Henan University, Kaifeng, Henan, China
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Narayan B, Urs AB, Augustine J, Singh H. Role of phosphatase and tensin homolog in pathogenesis of ameloblastoma: An immunohistochemical study. J Cancer Res Ther 2020; 16:513-516. [PMID: 32719259 DOI: 10.4103/jcrt.jcrt_528_18] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Background Altered molecular signaling pathways in ameloblastoma have been identified to play a pivotal role in the mechanism of oncogenesis, differentiation, and tumor progression. Phosphatidylinositol 3-kinase/protein kinase B/mammalian target of rapamycin pathway is one of the signaling pathways that are associated with the pathogenesis of ameloblastoma. Phosphatase and tensin homolog (PTEN) controls cell migration and proliferation. It monitors the level of the Akt and maintains cellular integrity. The present study was aimed to study the immunoexpression of PTEN in ameloblastoma to understand its role in the pathogenesis of ameloblastoma. Materials and Methods Twenty cases of ameloblastoma and ten cases of normal tooth germ were subjected to immunohistochemical staining against PTEN. Results Strong PTEN immunopositivity was seen in the tooth germs, while weak positivity was seen in the ameloblastoma. The immunoscore for PTEN was calculated by adding the percentage score and the intensity score. Seventeen cases showed the reduced PTEN expression in the epithelial component of ameloblastoma. The unpaired t-test showed a statistically significant difference in the mean PTEN immunoscore in tooth germ and ameloblastoma. Conclusion The study showed reduced PTEN immunoreactivity, which plays a role in the pathogenesis of ameloblastoma, through Akt pathway.
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Affiliation(s)
- Bhaskar Narayan
- Department of Oral Pathology and Microbiology, Maulana Azad Institute of Dental Sciences, New Delhi, India
| | - Aadithya B Urs
- Department of Oral Pathology and Microbiology, Maulana Azad Institute of Dental Sciences, New Delhi, India
| | - Jeyaseelan Augustine
- Department of Oral Pathology and Microbiology, Maulana Azad Institute of Dental Sciences, New Delhi, India
| | - Hanspal Singh
- Department of Oral Pathology and Microbiology, Maulana Azad Institute of Dental Sciences, New Delhi, India
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Abstract
Cardiac hypertrophy (CH) is closely related to a range of cardiovascular diseases, including heart failure and sudden cardiac death. The present study aimed to elucidate the role of long non-coding RNA (lncRNA) ZEB2 antisense RNA 1 (ZEB2-AS1) in regulating the hypertrophic process of cardiomyocytes and the potential underlying mechanism. An in vivo CH mouse model was established by performing transverse aortic constriction procedures. An in vitro CH model was established in primary cardiomyocytes isolated from mice by phenylephrine (PE) treatment. The relative protein levels of BNP, ANP and PTEN in cells with different groups (CH group and control group) were determined by western blotting. Relative expression levels of ZEB2-AS1, natriuretic peptide A (ANP) and brain natriuretic peptide (BNP) were determined in both in vivo and in vitro CH models. The regulatory effects of ZEB2-AS1/phosphatase and tensin homolog (PTEN) on cell surface area, and the relative expression levels of ANP and BNP were explored. ZEB2-AS1, ANP and BNP expression levels were increased in both in vivo and in vitro CH models compared with the sham and negative control groups, respectively. ZEB2-AS1 knockdown decreased cell surface area, and downregulated ANP and BNP expression levels in PE-treated primary cardiomyocytes. Similarly, PTEN overexpression reduced cell surface area, and downregulated ANP and BNP expression levels in PE-treated primary cardiomyocytes. Moreover, PTEN reversed the regulatory effects of ZEB2-AS1 on hypertrophic cardiomyocytes. Therefore, the present study suggested that lncRNA ZEB2-AS1 may influence the progression of CH by downregulating PTEN.
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Affiliation(s)
- Zhi Cheng
- Cardiovascular Center, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210003, P.R. China
| | - Lingyun Liu
- Cardiovascular Center, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210003, P.R. China
| | - Qingguo Li
- Cardiovascular Center, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210003, P.R. China
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Yuan B, Sun R, Du Y, Jia Z, Yao W, Yang J. STAT3-Induced Upregulation of lncRNA CASC9 Promotes the Progression of Bladder Cancer by Interacting with EZH2 and Affecting the Expression of PTEN. Onco Targets Ther 2020; 13:9147-9157. [PMID: 32982303 PMCID: PMC7502394 DOI: 10.2147/ott.s248006] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2020] [Accepted: 07/29/2020] [Indexed: 12/12/2022] Open
Abstract
Objective Long non-coding RNA (lncRNA) cancer susceptibility candidate 9 (CASC9) has been reported to play a vital role in tumorigenesis. This study explored the biological role of CASC9 and its regulation mechanism in bladder cancer (BC). Methods Gene expression was evaluated using quantitative reverse transcription polymerase chain reaction and Western blot. The functional role of CASC9 in BC was studied using Cell Counting Kit-8, colony formation assay, scratch wound healing assay, transwell invasion assay, and xenograft tumor assay. In addition, the mechanism of CASC9 function in BC was determined using RNA immunoprecipitation assay and chromatin immunoprecipitation assay. Results CASC9 was upregulated in BC tissues and cell lines, and correlated with the staging and metastasis in BC. Knockdown of CASC9 inhibited the proliferation, migration, and invasion of BC cells. Similarly, silencing of CASC9 inhibited tumor growth in vivo. Signal transducer and activator of transcription 3 (STAT3) was upregulated in BC tissues and cell lines, and positively correlated with CASC9 in BC tissues. Moreover, CASC9 was shown to be regulated by STAT3 in BC cells. Furthermore, CASC9 regulated phosphatase and tensin homolog (PTEN) expression by interacting with enhancer of zeste homolog 2 (EZH2). More significantly, CASC9 silencing-mediated inhibition of BC progression was partly reversed by EZH2 overexpression or PTEN inhibition. Conclusion Upregulation of CASC9 induced by STAT3 promoted the progression of BC by interacting with EZH2 and affecting the expression of PTEN, representing a novel regulatory mechanism for BC progression.
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Affiliation(s)
- Bo Yuan
- Intensive Care Unit, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province 450052, People's Republic of China
| | - Rongqing Sun
- Intensive Care Unit, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province 450052, People's Republic of China
| | - Yuming Du
- Intensive Care Unit, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province 450052, People's Republic of China
| | - Zhankui Jia
- Urinary Surgery Department, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province 450052, People's Republic of China
| | - Wencheng Yao
- Urinary Surgery Department, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province 450052, People's Republic of China
| | - Jinjian Yang
- Urinary Surgery Department, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province 450052, People's Republic of China
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Xia Q, Ali S, Liu L, Li Y, Liu X, Zhang L, Dong L. Role of Ubiquitination in PTEN Cellular Homeostasis and Its Implications in GB Drug Resistance. Front Oncol 2020; 10:1569. [PMID: 32984016 PMCID: PMC7492558 DOI: 10.3389/fonc.2020.01569] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Accepted: 07/21/2020] [Indexed: 12/15/2022] Open
Abstract
Glioblastoma (GB) is the most common and aggressive brain malignancy, characterized by heterogeneity and drug resistance. PTEN, a crucial tumor suppressor, exhibits phosphatase-dependent (PI3K-AKT-mTOR pathway)/independent (nucleus stability) activities to maintain the homeostatic regulation of numerous physiological processes. Premature and absolute loss of PTEN activity usually tends to cellular senescence. However, monoallelic loss of PTEN is frequently observed at tumor inception, and absolute loss of PTEN activity also occurs at the late stage of gliomagenesis. Consequently, aberrant PTEN homeostasis, mainly regulated at the post-translational level, renders cells susceptible to tumorigenesis and drug resistance. Ubiquitination-mediated degradation or deregulated intracellular localization of PTEN hijacks cell growth rheostat control for neoplastic remodeling. Functional inactivation of PTEN mediated by the overexpression of ubiquitin ligases (E3s) renders GB cells adaptive to PTEN loss, which confers resistance to EGFR tyrosine kinase inhibitors and immunotherapies. In this review, we discuss how glioma cells develop oncogenic addiction to the E3s-PTEN axis, promoting their growth and proliferation. Antitumor strategies involving PTEN-targeting E3 ligase inhibitors can restore the tumor-suppressive environment. E3 inhibitors collectively reactivate PTEN and may represent next-generation treatment against deadly malignancies such as GB.
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Affiliation(s)
- Qin Xia
- School of Life Sciences, Beijing Institute of Technology, Beijing, China
| | - Sakhawat Ali
- School of Life Sciences, Beijing Institute of Technology, Beijing, China
| | - Liqun Liu
- School of Life Sciences, Beijing Institute of Technology, Beijing, China
| | - Yang Li
- School of Life Sciences, Beijing Institute of Technology, Beijing, China
| | - Xuefeng Liu
- School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing, China
| | - Lingqiang Zhang
- State Key Laboratory of Proteomics, National Center for Protein Sciences, Beijing Institute of Lifeomics, Beijing, China
| | - Lei Dong
- School of Life Sciences, Beijing Institute of Technology, Beijing, China
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He P, Ma J, Liu Y, Deng H, Dong W. Hesperetin Promotes Cisplatin-Induced Apoptosis of Gastric Cancer In Vitro and In Vivo by Upregulating PTEN Expression. Front Pharmacol 2020; 11:1326. [PMID: 32973533 PMCID: PMC7482524 DOI: 10.3389/fphar.2020.01326] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2019] [Accepted: 08/10/2020] [Indexed: 12/24/2022] Open
Abstract
As one of the most common malignant gastrointestinal tumors, gastric cancer (GC) has a high incidence and poor prognosis. Cisplatin (DDP) is often used as chemotherapy for advanced GC; however, the high incidence of drug resistance remains a problem. The use of several anti-tumor drugs as combined chemotherapy is an effective strategy. Hesperetin has anti-tumor ability via its pro-apoptotic effect on various human cancers, both in vitro and in vivo, with no significant toxicity. However, a combination of DDP and hesperetin in GC has not been reported. The present study aimed to investigate the in vitro and in vivo chemosensitization effect and mechanism of hesperetin-augmented DDP-induced apoptosis of GC. The proliferation of GC ty -60cells was inhibited significantly in a time and dose-dependent manner by combined treatment of DDP with hesperetin. Hesperetin markedly increased DDP-induced apoptosis of GC cell lines. In a xenograft tumor mouse model, markedly better tumor suppression was observed after treatment with DDP plus hesperetin compared with that of either agent alone. Additionally, the combination of DDP and hesperetin remarkably increased the expression levels of phosphatase and tensin homolog (PTEN) and Cytochrome C (Cyt C), and significantly decreased the levels of phosphorylated protein kinase B (p-AKT) and CyclinD1. DDP and hesperetin also induced significant increases in apoptosis inducing factor (AIF), BCL2 associated X, apoptosis regulator (BAX), cleaved caspase-9, and cleaved caspase-3, and decreased B-cell lymphoma 2 (BCL2), caspase-9, and caspase-3 levels. Thus, we demonstrated that hesperetin could inhibit the phosphatidylinositol-4,5-bisphosphate 3-kinase (PI3K)/AKT signaling pathway and induce the mitochondrial pathway via upregulating PTEN expression, thereby significantly enhancing DDP’s anti-tumor effect on GC. Hesperetin is a potential chemotherapeutic agent for GC and merits further clinical investigation.
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Affiliation(s)
- Pengzhan He
- Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan, China.,Central Laboratory, Renmin Hospital of Wuhan University, Wuhan, China.,Key Laboratory of Hubei Province for Digestive System Disease, Wuhan, China
| | - Jingjing Ma
- Department of Geriatrics, Renmin Hospital of Wuhan University, Wuhan, China
| | - Yinghui Liu
- Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan, China.,Central Laboratory, Renmin Hospital of Wuhan University, Wuhan, China.,Key Laboratory of Hubei Province for Digestive System Disease, Wuhan, China
| | - Huan Deng
- Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan, China.,Central Laboratory, Renmin Hospital of Wuhan University, Wuhan, China.,Key Laboratory of Hubei Province for Digestive System Disease, Wuhan, China
| | - Weiguo Dong
- Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan, China
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Abstract
Diabetes mellitus (DM) is a prevalent metabolic disorder with complications including nephropathy, neuropathy, retinopathy and peripheral vascular disease. Crocin is a water soluble carotenoid that exhibits strong antioxidant activity. I investigated the potential hypoglycemic and reno-protective effects of crocin for type 1 diabetic male rats using periodic acid-Schiff and hematoxylin staining; metalloproteinase-7 (MMP-7), phosphatase and tensin homolog (PTEN) and phospho-Akt (p-Akt) immunohistochemistry; measurement of blood glucose, malondialdehyde (MDA), superoxide dismutase (SOD), total antioxidant and total oxidant status; and oxidative stress index. I used four groups of rats: control (saline treated), diabetic (single dose of 65 mg/kg streptozotocin), crocin (treated with 50 mg/kg) and diabetic + crocin. Crocin decreased levels of MDA, SOD, oxidative stress index and glucose significantly in diabetic animals. Renal damage from DM also was decreased by crocin treatment. MMP-7 and p-Akt immunoreactivity were stronger in the diabetic group compared to other groups, but PTEN immunoreactivity was weaker. Crocin treatment returned MMP-7 and PTEN expression to near normal. The ameliorative effect of crocin is attributed to its stimulation of the antioxidant defense system and its ability to regulate the MMP-7/PTEN/Akt signaling cascade.
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Affiliation(s)
- Ayşegül Kapucu
- Department of Biology, Faculty of Science, Istanbul University , Istanbul, Turkey
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43
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Nunes-Santos CJ, Uzel G, Rosenzweig SD. PI3K pathway defects leading to immunodeficiency and immune dysregulation. J Allergy Clin Immunol 2020; 143:1676-1687. [PMID: 31060715 DOI: 10.1016/j.jaci.2019.03.017] [Citation(s) in RCA: 85] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Revised: 03/26/2019] [Accepted: 03/26/2019] [Indexed: 12/16/2022]
Abstract
The phosphatidylinositol 3-kinase (PI3K) signaling pathway is involved in a broad range of cellular processes, including growth, metabolism, differentiation, proliferation, motility, and survival. The PI3Kδ enzyme complex is primarily present in the immune system and comprises a catalytic (p110δ) and regulatory (p85α) subunit. Dynamic regulation of PI3Kδ activity is required to ensure normal function and differentiation of immune cells. In the last decade, discovery of germline mutations in genes involved in the PI3Kδ pathway (PIK3CD, PIK3R1, or phosphatase and tensin homolog [PTEN]) proved that both overactivation and underactivation (gain of function and loss of function, respectively) of PI3Kδ lead to impaired and dysregulated immunity. Although a small group of patients reported to underactivate PI3Kδ show predominantly humoral defects and autoimmune features, more than 200 patients have been described with overactivation of PI3Kδ, presenting with a much more complex phenotype of combined immunodeficiency and immune dysregulation. The clinical and immunologic characterization, as well as current pathophysiologic understanding and specific therapies for PI3K pathway defects leading to immunodeficiency and immune dysregulation, are reviewed here.
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Affiliation(s)
- Cristiane J Nunes-Santos
- Immunology Service, Department of Laboratory Medicine, National Institutes of Health (NIH) Clinical Center, Bethesda, Md; Faculdade de Medicina, Instituto da Crianca, Universidade de São Paulo, São Paulo, Brazil
| | - Gulbu Uzel
- Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, Md
| | - Sergio D Rosenzweig
- Immunology Service, Department of Laboratory Medicine, National Institutes of Health (NIH) Clinical Center, Bethesda, Md.
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Mak HK, Yung JSY, Weinreb RN, Ng SH, Cao X, Ho TYC, Ng TK, Chu WK, Yung WH, Choy KW, Wang CC, Lee TL, Leung CKS. MicroRNA-19a-PTEN Axis Is Involved in the Developmental Decline of Axon Regenerative Capacity in Retinal Ganglion Cells. Mol Ther Nucleic Acids 2020; 21:251-263. [PMID: 32599451 PMCID: PMC7327411 DOI: 10.1016/j.omtn.2020.05.031] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Revised: 04/15/2020] [Accepted: 05/28/2020] [Indexed: 11/23/2022]
Abstract
Irreversible blindness from glaucoma and optic neuropathies is attributed to retinal ganglion cells (RGCs) losing the ability to regenerate axons. While several transcription factors and proteins have demonstrated enhancement of axon regeneration after optic nerve injury, mechanisms contributing to the age-related decline in axon regenerative capacity remain elusive. In this study, we show that microRNAs are differentially expressed during RGC development and identify microRNA-19a (miR-19a) as a heterochronic marker; developmental decline of miR-19a relieves suppression of phosphatase and tensin homolog (PTEN), a key regulator of axon regeneration, and serves as a temporal indicator of decreasing axon regenerative capacity. Intravitreal injection of miR-19a promotes axon regeneration after optic nerve crush in adult mice, and it increases axon extension in RGCs isolated from aged human donors. This study uncovers a previously unrecognized involvement of the miR-19a-PTEN axis in RGC axon regeneration, and it demonstrates therapeutic potential of microRNA-mediated restoration of axon regenerative capacity in optic neuropathies.
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Affiliation(s)
- Heather K Mak
- Department of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Hong Kong, PRC
| | - Jasmine S Y Yung
- Department of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Hong Kong, PRC
| | - Robert N Weinreb
- Hamilton Glaucoma Center, Shiley Eye Institute, University of California, San Diego, La Jolla, CA, USA; Department of Ophthalmology, University of California, San Diego, La Jolla, CA, USA
| | - Shuk Han Ng
- Department of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Hong Kong, PRC
| | - Xu Cao
- Department of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Hong Kong, PRC
| | - Tracy Y C Ho
- Department of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Hong Kong, PRC
| | - Tsz Kin Ng
- Department of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Hong Kong, PRC
| | - Wai Kit Chu
- Department of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Hong Kong, PRC
| | - Wing Ho Yung
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, PRC; Gerald Choa Neuroscience Centre, The Chinese University of Hong Kong, Hong Kong, PRC
| | - Kwong Wai Choy
- Department of Obstetrics and Gynecology, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong, PRC
| | - Chi Chiu Wang
- Department of Obstetrics and Gynecology, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong, PRC
| | - Tin Lap Lee
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, PRC
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Mohamed MZ, Baky MAE, Hassan OA, Mohammed HH, Abdel-Aziz AM. PTEN/PI3K/VEGF signaling pathway involved in the protective effect of xanthine oxidase inhibitor febuxostat against endometrial hyperplasia in rats. Hum Exp Toxicol 2020; 39:1224-1234. [PMID: 32228192 DOI: 10.1177/0960327120914977] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Endometrial hyperplasia (EH) is a medical condition that affects many females as it increases their uterine carcinogenic potential. EH results from entangling hormonal imbalance and inflammatory response. The study examined the role of a xanthine oxidase inhibitor, febuxostat, in a rat model of EH. Adult female Wistar albino rats were subjected to estradiol valerate (EV) 2 mg/kg for 10 days to induce EH. Another group was treated concomitantly with febuxostat 10 mg/kg for the same period. The uterine malondialdehyde, reduced glutathione (GSH), and superoxide dismutase (SOD) were assessed by chemical methods. Gene expressions of phosphatidylinositol-3-kinase (PI3K), Akt, and hypoxia-inducible factor 1 alpha were assessed by the quantitative real-time polymerase chain reaction. Moreover, the vascular endothelial growth factor (VEGF) and interleukin-6 (IL-6) were measured by enzyme-linked immunosorbent assay. Histopathology and immunohistochemical techniques were used for the detection of phosphatase and tensin homolog (PTEN). The results revealed that EV administration induced complex EH with focal atypia and loss of PTEN expression by the histological examination. Uteri of the EV group showed a significant drop in GSH content and SOD activity and rise in the expressions of PI3K, Akt, VEGF, and IL-6. Febuxostat administration significantly improved the uterine GSH and SOD levels. It decreased the expressions of PI3K, Akt, VEGF, and IL-6. The endometrium showed a regression of the proliferative epithelium with the restoration of PTEN expression and the absence of the atypical features. In conclusion, febuxostat protected the endometrium against estrogen-induced EH and may be beneficial in the management along with the hormonal therapy.
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Affiliation(s)
- M Z Mohamed
- Department of Pharmacology, Faculty of Medicine, Minia University, Minia, Egypt
| | - Mf Abed El Baky
- Department of Biochemistry, Faculty of Medicine, Minia University, Minia, Egypt
| | - O A Hassan
- Department of Obstetrics and Gynecology, Faculty of Medicine, Al-Azhar University, Assuit, Egypt
| | - H H Mohammed
- Department of Histology, Faculty of Medicine, Minia University, Minia, Egypt
| | - A M Abdel-Aziz
- Department of Pharmacology, Faculty of Medicine, Minia University, Minia, Egypt
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Chen W, Zhang YN, Jia QQ, Ji A, Shao SX, Zhang L, Gong M, Yin Q, Huang XL. MicroRNA-214 protects L6 skeletal myoblasts against hydrogen peroxide-induced apoptosis. Free Radic Res 2020; 54:162-172. [PMID: 32131653 DOI: 10.1080/10715762.2020.1730828] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
MicroRNAs (miRNAs) have been reported as key gene regulators, and they control many fundamental biological processes. Previously, we demonstrated that miR-214 had a protective effect against myocardial apoptosis and myocardial fibrosis. In this study, we sought to investigate the expression of miR-214 in L6 skeletal myoblast (SKM), the regulatory effect of miR-214 on hydrogen peroxide (H2O2) induced cell apoptosis and the underlying mechanisms of the antiapoptotic effect. MiR-214 expression was up-regulated by H2O2 in a dose and time-dependent manner in L6 SKMs. To investigate the regulatory effects of miR-214 on L6 SKM, both gain-of-function and loss-of-function approaches were applied. The results showed that miR-214 improved cell survival and inhibited cell apoptosis, and blockage of miR-214 abrogated the protective effect on cell survival and resistance to apoptosis. Phosphatase and tensin homolog (PTEN) was negatively regulated by miR-214, and PTEN inhibitor obviously reversed the effect of miR-214 blockage on enhancing cell apoptosis. In addition, miR-214 up-regulated antiapoptotic protein Bcl-2, down-regulated proapoptotic protein Bax, prevented release of cytochrome c and inhibited caspase-3 activation. In summary, H2O2-induced injury increases miR-214 expression in L6 SKM, and miR-214 contributes to the protection of L6 SKM against apoptosis via lowering PTEN and subsequently inhibiting the mitochondrial-mediated caspase-dependent apoptotic signaling pathway.
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Affiliation(s)
- Wei Chen
- Department of Histology and Embryology, Hebei Medical University, Shijiazhuang, Hebei, China
| | - Ya-Nan Zhang
- Department of Histology and Embryology, Hebei Medical University, Shijiazhuang, Hebei, China
| | - Qiong-Qiong Jia
- Department of Emergency, People's Hospital of Zhengding, Shijiazhuang, Hebei, China
| | - An Ji
- Department of Histology and Embryology, Hebei Medical University, Shijiazhuang, Hebei, China
| | - Su-Xia Shao
- Department of Histology and Embryology, Hebei Medical University, Shijiazhuang, Hebei, China
| | - Lei Zhang
- Department of Histology and Embryology, Hebei Medical University, Shijiazhuang, Hebei, China
| | - Miao Gong
- Department of Histology and Embryology, Hebei Medical University, Shijiazhuang, Hebei, China
| | - Qing Yin
- Department of Histology and Embryology, Hebei Medical University, Shijiazhuang, Hebei, China
| | - Xin-Li Huang
- Department of Pathophysiology, Hebei Medical University, Shijiazhuang, Hebei, China
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Qin H, Qin C. Downregulation of long non-coding RNA NR2F2-AS1 inhibits proliferation and induces apoptosis of nasopharyngeal carcinoma cells by upregulating the expression of PTEN. Oncol Lett 2020; 19:1145-1150. [PMID: 31966043 PMCID: PMC6955651 DOI: 10.3892/ol.2019.11211] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Accepted: 10/22/2019] [Indexed: 11/12/2022] Open
Abstract
The novel long non-coding RNA NR2F2-AS1 has been characterized as an oncogene in lung cancer. The present study aimed to investigate the role of NR2F2-AS1 in nasopharyngeal carcinoma (NPC). The results demonstrated that expression of NR2F2-AS1 and phosphatase and tensin homolog (PTEN) were negatively associated with each other in NPC tissues. Furthermore, upregulated NR2F2-AS1 expression levels and downregulated PTEN expression levels in NPC tissues predicted less favorable survival outcomes in patients with NPC. Transfection of NPC cells with NR2F2-AS1 small interfering RNA resulted in increased expression of PTEN. In addition, NR2F2-AS1 silencing and PTEN overexpression resulted in decreased proliferation and an increase in the apoptotic rate of NPC cells. In conclusion, NR2F2-AS1 downregulation decreased proliferation and increased apoptosis of NPC cells via upregulation of PTEN.
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Affiliation(s)
- He Qin
- Department of Otolaryngology, Head and Neck Surgery, Beijing Tsinghua Changgung Hospital, School of Clinical Medicine, Tsinghua University, Changping, Beijing 102218, P.R. China
| | - Chong Qin
- Department of Emergency, Dongying Shengli Hospital, Dongying, Shandong 257055, P.R. China
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Xia C, Zeng H, Zheng Y. Low‑intensity ultrasound enhances the antitumor effects of doxorubicin on hepatocellular carcinoma cells through the ROS‑miR‑21‑PTEN axis. Mol Med Rep 2020; 21:989-998. [PMID: 32016465 PMCID: PMC7003057 DOI: 10.3892/mmr.2020.10936] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Accepted: 03/06/2019] [Indexed: 12/14/2022] Open
Abstract
Hepatocellular carcinoma (HCC) is a type of liver cancer and is a leading cause of cancer-associated mortality. In China, ~466,000 patients are diagnosed with HCC and it is responsible for ~422,000 cases of mortality each year. Surgery is the most effective treatment available; however it is only suitable for patients with early-stage HCC. Chemotherapy has been confirmed as a necessary treatment for patients with advanced HCC, although drug resistance may limit its clinical outcome. Low intensity ultrasound (LIUS) represents a novel therapeutic approach to treat patients with HCC; however, its underlying molecular mechanism remains unclear. In the present study, cell viability, apoptosis and reactive oxygen species (ROS) generation were determined via Cell Counting Kit-8, flow cytometry and 2′,7′-dichlorofluorescein diacetate assays, respectively. The expression of miRNA in HCC cells following exposure to LIUS and doxorubicin (Dox) was analyzed using a microarray and reverse transcription-quantitative polymerase chain reaction analysis. It was revealed treatment with LIUS in combination with Dox was able to induce apoptosis of Huh7 cells, increasing the intracellular levels of reactive oxygen species (ROS) and malondialdehyde. Glutathione peroxidase and superoxide dismutase 1 are ROS-scavenging enzymes, which serve important roles in the oxidative balance, preventing oxidative stress. The protein expression levels of these two enzymes were significantly decreased following treatment with LIUS combined with Dox. The present results suggested that LIUS may decrease Dox resistance in HCC cells and that LIUS may be combined with chemotherapy to treat HCC. By performing microarray analysis, the expression levels of microRNA-21 (miR-21) were decreased following treatment with LIUS combined with Dox. Functional experiments showed that knockdown of miR-21 enhanced the antitumor activity of Dox, whereas overexpression of miR-21 reversed these effects. Phosphatase and tensin homolog (PTEN), a well-known tumor suppressor, was revealed to be a direct target of miR-21, and its translation was suppressed by miR-21. Finally, it was determined that combined treatment of LIUS and Dox induced anticancer effects by blocking the activation of the AKT/mTOR pathway, as demonstrated by the downregulation of phosphorylated (p-)AKT and p-mTOR; N-acetylcysteine, a general ROS inhibitor reversed the suppressive effects on the AKT/mTOR pathway mediated by LIUS and Dox. Collectively, the present results suggested that LIUS increased cell sensitivity to Dox via the ROS/miR-21/PTEN pathway. Chemotherapy combined with LIUS may represent a novel effective therapeutic strategy to treat patients with advanced HCC.
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Affiliation(s)
- Chunhua Xia
- Department of Ultrasound, Suqian Obstetrics and Gynecology Hospital, Suqian, Jiangsu 223800, P.R. China
| | - Huabei Zeng
- Department of Ultrasound, Suqian Obstetrics and Gynecology Hospital, Suqian, Jiangsu 223800, P.R. China
| | - Yanfen Zheng
- Department of Ultrasound, School of Imaging of Baotou Medical College, Inner Mongolia University of Science and Technology, Baotou, Inner Mongolia 014060, P.R. China
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Liang Y, Lin B, Ye Z, Chen S, Yu H, Chen C, Zhang X, Zhou K, Zeng J. Triple-high expression of phosphatase and tensin homolog (PTEN), estrogen receptor (ER) and progesterone receptor (PR) may predict favorable prognosis for patients with Type I endometrial carcinoma. J Cancer 2020; 11:1436-1445. [PMID: 32047550 PMCID: PMC6995374 DOI: 10.7150/jca.33720] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Accepted: 11/19/2019] [Indexed: 01/30/2023] Open
Abstract
Endometrial carcinoma (EC) is the most common malignant tumors in female derived from the endometrial epithelium. Several previous studies have described estrogen receptors (ER), progesterone Receptor (PR) and phosphatase and tensin homolog (PTEN) are associated with clinicopathological factors and prognosis in EC patients. However, during EC patients follow-up, we found that some EC patients with down-regulation of PTEN, but up-regulation of ER or PR , and some EC patients with down-regulation of ER or PR, but up-regulation of PTEN also had a poor prognosis. Therefore, to reveal the prognosis of EC patients with different phenotypes based on PTEN, ER and PR expression, 120 cases formalin-fixed paraffin-embedded EC tissues and 543 cases uterine corpus endometrial carcinoma (UCEC) patients from the cancer genome atlas (TCGA) UCEC datasets were analyzed. Results showed that EC tissues can be classified to PTENLERLPRL, PTENHERLPRL, PTENHERHPRH, PTENLERHPRH, PTENHERHPRL, PTENHERLPRH, and PTENLERHPRL phenotypes basing on IHC analysis. Additionally, EC patients with PTENLERLPRL showed high malignancy, while patients with PTENHERHPRH showed low malignancy. Therefore, combined detection of PTEN, ER, PR may help identify a small subset of EC with more aggressive behavior and may aid in risk stratification.
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Affiliation(s)
- Yanfang Liang
- Department of Pathology, Dongguan Hospital Affiliated to Medical College of Jinan University, The Fifth People's Hospital of Dongguan, Dongguan 523905, China
| | - Bihua Lin
- Dongguan Key Laboratory of Medical Bioactive Molecular Developmental and Translational Research, Guangdong Provincial Key Laboratory of Medical Molecular Diagnostics, Guangdong Medical University, Dongguan, Guangdong 523808, China
| | - Ziyu Ye
- Dongguan Key Laboratory of Medical Bioactive Molecular Developmental and Translational Research, Guangdong Provincial Key Laboratory of Medical Molecular Diagnostics, Guangdong Medical University, Dongguan, Guangdong 523808, China
| | - Shasha Chen
- Dongguan Key Laboratory of Medical Bioactive Molecular Developmental and Translational Research, Guangdong Provincial Key Laboratory of Medical Molecular Diagnostics, Guangdong Medical University, Dongguan, Guangdong 523808, China
| | - Haibo Yu
- Dongguan Key Laboratory of Medical Bioactive Molecular Developmental and Translational Research, Guangdong Provincial Key Laboratory of Medical Molecular Diagnostics, Guangdong Medical University, Dongguan, Guangdong 523808, China
| | - Can Chen
- Department of Pathology, Dongguan Hospital Affiliated to Medical College of Jinan University, The Fifth People's Hospital of Dongguan, Dongguan 523905, China
| | - Xin Zhang
- Clinical Experimental Center, Jiangmen Central Hospital, Affiliated Jiangmen Hospital of Sun Yat-sen University, Jiangmen 529030, China
| | - Keyuan Zhou
- Dongguan Key Laboratory of Medical Bioactive Molecular Developmental and Translational Research, Guangdong Provincial Key Laboratory of Medical Molecular Diagnostics, Guangdong Medical University, Dongguan, Guangdong 523808, China
| | - Jincheng Zeng
- Dongguan Key Laboratory of Medical Bioactive Molecular Developmental and Translational Research, Guangdong Provincial Key Laboratory of Medical Molecular Diagnostics, Guangdong Medical University, Dongguan, Guangdong 523808, China
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50
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Zhu B, Wei Y. Antitumor activity of celastrol by inhibition of proliferation, invasion, and migration in cholangiocarcinoma via PTEN/PI3K/Akt pathway. Cancer Med 2020; 9:783-796. [PMID: 31957323 PMCID: PMC6970044 DOI: 10.1002/cam4.2719] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Revised: 10/02/2019] [Accepted: 10/30/2019] [Indexed: 12/12/2022] Open
Abstract
AIM Cholangiocarcinoma is a malignant tumor originating from bile duct epithelium. Currently, the treatment strategy is very limited and the prognosis is poor. Recent studies reported celastrol exhibits antigrowth and antimetastasis properties in many tumors. Our study aimed to assess the anti-CCA effects of cholangiocarcinoma (CCA) and the mechanisms involved in it. METHODS In this study, the long-term and short-term antiproliferation effects was determined using colony formation and Cell Counting Kit-8 (CCK-8) assays, respectively. Flow cytometry was performed to quantify apoptosis. Furthermore, wound healing and transwell assays were performed to determine the cell migration and invasion capabilities, respectively. To further find the mechanism involved in the celastrol-induced biological functions, LY204002, a PI3K/Akt signaling inhibitor, and an Akt-1 overexpression plasmid were employed to find whether PI3K/Akt pathway was involved in the celastrol-induced CCA cell inhibition. Additionally, short interfering RNA (siRNA) was also used to investigate the mechanism involved in the celastrol-induced PI3K/Akt signaling inhibition. Western blotting and immunofluorescence assays were also performed to detect the degree of relative proteins. Moreover, we validated the antiproliferation and antimetastasis effects of celastrol in vivo by constructing subcutaneous and lung metastasis nude mice models. RESULTS We discovered that celastrol effectively induced apoptotic cell death and inhibited the capacity of migration and invasion in CCA cells. Further mechanistic study identified that celastrol regulated the PI3K/Akt signaling pathway, and the antitumor efficacy was likely due to the upregulation of PTEN, a negative regulator of PI3K/Akt. Blockage of PTEN abolished the celastrol-induced PI3K/Akt signaling inhibition. Additionally, in vivo experiments conformed celastrol inhibited the tumor growth and lung metastasis with no serious side effects. CONCLUSIONS Overall, our study elucidated a mechanistic framework for the anti-CCA effects of celastrol via PTEN/PI3K/Akt pathway.
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Affiliation(s)
- Biqiang Zhu
- Department of Oncology and Laparoscopy SurgeryThe First Affiliated Hospital of Harbin Medical UniversityHarbinHeilongjiangChina
- Translational Medicine Research and Cooperation Center of Northern ChinaHarbinHeilongjiangChina
| | - Yunwei Wei
- Department of Oncology and Laparoscopy SurgeryThe First Affiliated Hospital of Harbin Medical UniversityHarbinHeilongjiangChina
- Translational Medicine Research and Cooperation Center of Northern ChinaHarbinHeilongjiangChina
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