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Jiang W, Hu Y, Wang X, Zhang Q, Guo X, Cheng S, Chen L, Ying J, Zhang L, Jiang B. miR-125b-5p-MAPK1-C/EBPα feedback loop regulates all-trans retinoic acid resistance in acute promyelocytic leukemia. Gene 2023; 889:147806. [PMID: 37717613 DOI: 10.1016/j.gene.2023.147806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Revised: 08/29/2023] [Accepted: 09/14/2023] [Indexed: 09/19/2023]
Abstract
BACKGROUND Various studies have highlighted the significance of miR-125b-5p in tumour chemotherapy resistance; However, whether miR-125b-5p is associated with all-trans retinoic acid (ATRA) resistance in acute promyelocytic leukemia (APL) has not been reported. METHODS Drug-resistance-related factors in APL were predicted using the DRESIS database. The expression levels of miR-125b-5p in ATRA-sensitive and ATRA-resistant APL cells were determined using quantitative reverse transcription polymerase chain reaction (qRT-PCR). A nitrotetrazolium blue (NBT) reduction assay and flow cytometry (FCM) were used to detect the effect of miR-125b-5p on ATRA resistance in APL cells. An APL xenograft tumour mouse model was established to determine the effect of miR-125b-5p on ATRA resistance. A dual-luciferase gene reporter assay, qRT-PCR, and western blotting verified the regulation by miR-125b-5p of its target gene, MAPK1, and the MAPK1 downstream factor, C/EBPα. An NBT reduction assay and FCM were used to detect the effect of C/EBPα on ATRA resistance in APL cells. Western blotting and qRT-PCR were used to assess the regulation of miR-125b-5p and MAPK1 by C/EBPα. RESULTS miR-125b-5p expression levels were dramatically increased in ATRA-resistant APL cells. Both in vitro and in vivo experiments revealed that miR-125b-5p overexpression enhanced ATRA resistance in APL. miR-125b-5p promoted ATRA resistance by sponging MAPK1. C/EBPα was negatively regulated by miR-125b-5p, which in addition, regulated ATRA resistance in APL cells. C/EBPα also regulated the miR-125b-5p-MAPK1 axis. CONCLUSION The findings of this study indicate that the miR-125b-5p-MAPK1-C/EBPα feedback loop regulated ATRA resistance in APL. Thus, miR-125b-5p may be a promising target for treating ATRA resistance in APL.
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Affiliation(s)
- Wenjuan Jiang
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Yongkang Hu
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Xian Wang
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Qi Zhang
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Xinlong Guo
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Siyu Cheng
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Langqun Chen
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Jiahui Ying
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Liang Zhang
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China.
| | - Baoping Jiang
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China.
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C/EBPα Regulates PxTreh1 and PxTreh2 Trehalase-Related Bt Resistance in Plutella xylostella (L.). INSECTS 2022; 13:insects13040340. [PMID: 35447782 PMCID: PMC9024946 DOI: 10.3390/insects13040340] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/26/2022] [Revised: 03/29/2022] [Accepted: 03/29/2022] [Indexed: 11/17/2022]
Abstract
Simple Summary The diamondback moth (Plutella xylostella) is a major agricultural pest of cruciferous vegetables and crops worldwide, causing economic losses of up to USD 5 billion annually. The long-term use of insecticides leads to the rapid evolution of resistance in insects, which greatly increases the difficulty of controlling pests. Trehalase regulates energy metabolism in insects by converting trehalose into two glucose molecules. The existence of trehalase is critical for insect flight and larval stress resistance. However, whether trehalase participates in the development of pesticide resistance remains unclear. In this study, we found that the activity of trehalase and the levels of gene expression in Bt-resistant and field populations of P. xylostella were significantly higher than they were in the susceptible strains. By analyzing the promoter sequences of PxTreh1 and PxTreh2, we confirmed the interaction between C/EBPα and the PxTreh2 promoter. The findings of this study suggest that C/EBPα mediates the adaptability of P. xylostella to adverse environmental stressors by regulating the expression of trehalase. Abstract Trehalase regulates energy metabolism in insects by converting trehalose into two glucose molecules. High amounts of trehalase are critical for insect flight and larval stress resistance. However, whether trehalase participates in the development of pesticide resistance remains unclear. In this study, we explored this phenomenon and the mechanism that underlies the regulation of Trehalase transcription. We found that overexpression of PxTreh1 and PxTreh2 induced Bacillus thuringiensis (Bt) resistance in Plutella xylostella. The promoter sequences of PxTreh1 and PxTreh2 were also cloned and identified. The dual-luciferase reporter system and RNA interference technology revealed that the expression of PxTreh1 and PxTreh2 genes is possibly regulated by the CCAAT enhancer-binding protein (C/EBPα). A yeast one-hybrid experiment confirmed the interaction between C/EBPα and the PxTreh2 promoter. The findings of this study suggest that C/EBPα mediates the adaptability of P. xylostella to adverse environmental stressors by regulating the expression of trehalase.
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Shanmuganathan N, Branford S. The Hidden Pathogenesis of CML: Is BCR-ABL1 the First Event? Curr Hematol Malig Rep 2020; 14:501-506. [PMID: 31696382 DOI: 10.1007/s11899-019-00549-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
PURPOSE OF REVIEW Identification of the BCR-ABL1 fusion oncogene in patients diagnosed with chronic myeloid leukemia (CML) led to the development of targeted therapy responsible for the dramatic survival benefits observed in the past two decades. However, despite these revolutionary findings, there remains marked disparity in patient outcomes. Why do some patients present de novo while others evolve to the more aggressive stages of CML? Why can select patients successfully discontinue therapy as part of a treatment-free remission attempt whereas others fail to meet specific molecular milestones? RECENT FINDINGS BCR-ABL1 kinase mutations are only identified in approximately 50% of patients with poor responses and disease progression, suggesting the presence of alternative resistance mechanisms. Numerous institutions have identified the presence of additional genomic events in addition to BCR-ABL1 with the increasing availability of next-generation sequencing. We explore the potential pathways and events that may cooperate with BCR-ABL1 to answer these questions but also challenge the fundamental tenet that BCR-ABL1 is always the sole event initiating CML.
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Affiliation(s)
- Naranie Shanmuganathan
- Department of Genetics and Molecular Pathology, SA Pathology, Adelaide, Australia. .,Precision Medicine Theme, South Australian Health and Medical Research Institute, Adelaide, Australia. .,School of Medicine, University of Adelaide, Adelaide, Australia. .,Department of Haematology, Royal Adelaide Hospital and SA Pathology, Adelaide, Australia. .,School of Health Sciences, University of South Australia, Adelaide, Australia.
| | - Susan Branford
- Department of Genetics and Molecular Pathology, SA Pathology, Adelaide, Australia.,Precision Medicine Theme, South Australian Health and Medical Research Institute, Adelaide, Australia.,School of Medicine, University of Adelaide, Adelaide, Australia.,School of Pharmacy and Medical Science, University of South Australia, Adelaide, Australia.,School of Biological Sciences, University of Adelaide, Adelaide, Australia
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Chandran RK, Geetha N, Sakthivel KM, Kumar RS, Krishna KMNJ, Sreedharan H. Differential gene expression changes and their implication on the disease progression in patients with Chronic Myeloid Leukemia. Blood Cells Mol Dis 2019; 77:51-60. [PMID: 30959263 DOI: 10.1016/j.bcmd.2019.03.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2019] [Revised: 03/21/2019] [Accepted: 03/21/2019] [Indexed: 12/26/2022]
Abstract
The molecular mechanisms responsible for disease progression of CML are not conclusive. The main functional changes associated with disease evolution in CML was high proliferation rate, decreased apoptosis, blockade of differentiation, and strong resistance to chemotherapeutic agents. The current study analyzed the relative expressional profiles of genes related with proliferation, apoptosis, differentiation, and resistance to chemotherapeutic agents such as c-MYC, BAD, BCL-2, C/EBPα/-β and ABCB1 respectively in different clinical stages of CML by SYBR Green I quantitative real-time (qRT) PCR. We selected a total of 183 CML patients and 30 healthy control samples. The study populations were classified into four groups, including de novo CML-CP (50/183), CML-AP (32/183), CML-BC (51/183) and Imatinib Mesylate or IM resistant CML-CP (50/183) groups. qRT PCR analysis revealed that significant overexpression of c-MYC, ABCB1 and BCL-2 was observed in advanced phases and IM resistant CP of CML compared to healthy controls. Likewise, the mean expression level of BAD, C/EBPα/-β genes were found to be significantly down regulated. Present study concluded that the complex interplay of several candidate genes like overexpression of c-MYC, ABCB1, BCL-2 and down regulation of BAD, C/EBPα/-β played a significant role in the disease evolution and development of drug resistant in CML.
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Affiliation(s)
- Ramachandran Krishna Chandran
- Laboratory of Cytogenetics and Molecular Diagnostics, Division of Cancer Research, Regional Cancer Centre, Medical College Post, Trivandrum 695011, Kerala, India
| | - Narayanan Geetha
- Division of Medical Oncology, Regional Cancer Centre, Medical College Post, Trivandrum 695011, Kerala, India
| | - Kunnathur Murugesan Sakthivel
- Laboratory of Cytogenetics and Molecular Diagnostics, Division of Cancer Research, Regional Cancer Centre, Medical College Post, Trivandrum 695011, Kerala, India; Department of Biochemistry, PSG College of Arts and Science, Civil Aerodrome Post, Coimbatore 641014, India
| | - Raveendran Suresh Kumar
- Laboratory of Cytogenetics and Molecular Diagnostics, Division of Cancer Research, Regional Cancer Centre, Medical College Post, Trivandrum 695011, Kerala, India
| | | | - Hariharan Sreedharan
- Laboratory of Cytogenetics and Molecular Diagnostics, Division of Cancer Research, Regional Cancer Centre, Medical College Post, Trivandrum 695011, Kerala, India.
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Sun A, Zhang H, Pang F, Niu G, Chen J, Chen F, Zhang J. Essential genes of the macrophage response to Staphylococcus aureus exposure. Cell Mol Biol Lett 2018; 23:25. [PMID: 29849669 PMCID: PMC5966896 DOI: 10.1186/s11658-018-0090-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Accepted: 05/06/2018] [Indexed: 12/15/2022] Open
Abstract
Background Although significant advances have been made in understanding the mechanisms of macrophage response to Staphylococcus aureus infection, the molecular details are still elusive. Identification of the essential genes and biological processes of macrophages that are specifically changed at different durations of S. aureus exposure is of great clinical significance. Methods We aimed to identify the significantly changed genes and biological processes of S. aureus-exposed macrophages. We systematically analyzed the macrophage gene expression profile GSE 13670 database with 8 h, 24 h or 48 h S. aureus infection. The results were further confirmed by western blot and quantitative polymerase chain reaction (qPCR) analyses. Results After 8 h of S. aureus infection, the expression of 624 genes was significantly changed. Six hundred thirteen differentially expressed genes (DEGs) were identified after 24 h of S. aureus infection. Two hundred fifty-three genes were significantly changed after 48 h of S. aureus infection. STAT1 was consistently up-regulated in these three treatments. TP53, JAK2, CEBPA, STAT3, MYC, CTNNB1 and PRKCA were only identified in the 8 h or 24 h S. aureus infection groups. CTNNB1 and PRKCA were for the first time identified as potential essential genes in S. aureus infection of macrophages. In the Gene Ontology (GO) term analysis, the defense response was shown to be the most significantly changed biological process among all processes; KEGG pathway analysis identified the JAK-STAT signaling pathway involved in early infection. Conclusions Our systematic analysis identified unique gene expression profiles and specifically changed biological processes of the macrophage response to different S. aureus exposure times.
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Affiliation(s)
- Aixia Sun
- 1Department of Clinical Laboratory, Liaocheng People's Hospital, 67 West Dongchang Road, Liaocheng, 252000 Shandong Province People's Republic of China
| | - Hongwei Zhang
- 1Department of Clinical Laboratory, Liaocheng People's Hospital, 67 West Dongchang Road, Liaocheng, 252000 Shandong Province People's Republic of China
| | - Feng Pang
- 1Department of Clinical Laboratory, Liaocheng People's Hospital, 67 West Dongchang Road, Liaocheng, 252000 Shandong Province People's Republic of China
| | - Guifen Niu
- 2Department of Endocrinology, Liaocheng People's Hospital, 67 West Dongchang Road, Liaocheng, 252000 Shandong Province People's Republic of China
| | - Jianzhong Chen
- 3Department of Clinical Pharmacy, Liaocheng People's Hospital, 67 West Dongchang Road, Liaocheng, 252000 Shandong Province People's Republic of China
| | - Fei Chen
- 3Department of Clinical Pharmacy, Liaocheng People's Hospital, 67 West Dongchang Road, Liaocheng, 252000 Shandong Province People's Republic of China
| | - Jian Zhang
- Outpatient Vaccination Service, Center for Disease Control and Prevention of Liaocheng, Liaocheng, 252000 Shandong Province People's Republic of China
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Guo Y, Ma Y, Hu X, Song R, Zhu L, Zhong M. Long non-coding RNA CEBPA-AS1 correlates with poor prognosis and promotes tumorigenesis via CEBPA/Bcl2 in oral squamous cell carcinoma. Cancer Biol Ther 2018; 19:205-213. [PMID: 29281558 DOI: 10.1080/15384047.2017.1416276] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Abstract
Oral squamous cell carcinoma (OSCC) is one of the most aggressive and lethal malignancies affecting the head and neck region with a general 5-year survival rate about 50%. Long non-coding RNAs (lncRNAs) are believed to participate in diverse biological processes and are emerging as convenient and minimally invasive diagnostic/prognostic/therapeutic markers. The aim of this study was to explore CEBPA-AS1 role and mechanism in OSCC tumorigenesis. In this study, CEBPA-AS1 localized in the cytoplasm and the peri-nuclear cellular compartment functioning as a potential oncogene up-regulated in OSCC was correlated with poor differentiation, lymph node metastasis and high clinical stage, which made it considered to be a prognostic biomarker. Silence of CEBPA-AS1 inhibited OSCC cells proliferation and induced cells apoptosis, migration and invasion by targeting CEBPA and via a novel pathway CEBPA/Bcl2. Our findings provided the first evidence for the lncRNA CEBPA-AS1 regulatory network in OSCC tumorigenesis, which might be helpful to improve the effects of clinical treatment in OSCC.
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Affiliation(s)
- Yan Guo
- a Department of Central Laboratory , School of Stomatology, China Medical University , Shenyang , Liaoning , China.,b Key laboratory of Oral Disease Liaoning Province , Shenyang , Liaoning , China.,c Department of Oral Biology , School of Stomatology, China Medical University , Shenyang , Liaoning , China
| | - Yuji Ma
- a Department of Central Laboratory , School of Stomatology, China Medical University , Shenyang , Liaoning , China.,b Key laboratory of Oral Disease Liaoning Province , Shenyang , Liaoning , China.,c Department of Oral Biology , School of Stomatology, China Medical University , Shenyang , Liaoning , China
| | - Xuanhao Hu
- d Department of Neurobiology , China Medical University , Shenyang , Liaoning , China
| | - Rongbo Song
- a Department of Central Laboratory , School of Stomatology, China Medical University , Shenyang , Liaoning , China.,b Key laboratory of Oral Disease Liaoning Province , Shenyang , Liaoning , China.,c Department of Oral Biology , School of Stomatology, China Medical University , Shenyang , Liaoning , China
| | - Li Zhu
- a Department of Central Laboratory , School of Stomatology, China Medical University , Shenyang , Liaoning , China.,b Key laboratory of Oral Disease Liaoning Province , Shenyang , Liaoning , China.,c Department of Oral Biology , School of Stomatology, China Medical University , Shenyang , Liaoning , China
| | - Ming Zhong
- a Department of Central Laboratory , School of Stomatology, China Medical University , Shenyang , Liaoning , China.,b Key laboratory of Oral Disease Liaoning Province , Shenyang , Liaoning , China
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Zhang G, Dong F, Luan C, Zhang X, Shao H, Liu J, Sun C. Overexpression of CCAAT Enhancer-Binding Protein α Inhibits the Growth of K562 Cells via the Foxo3a-Bim Pathway. Acta Haematol 2016; 136:65-70. [PMID: 27161125 DOI: 10.1159/000444517] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2015] [Accepted: 02/07/2016] [Indexed: 11/19/2022]
Abstract
We aimed to investigate the role of CCAAT enhancer-binding protein α (C/EBPα) in the pathogenesis of chronic myeloid leukemia (CML) and the mechanism underlying its effect. Bone marrow specimens from 50 patients with CML and peripheral blood specimens from 20 healthy individuals were collected. K562 cells were treated with imatinib. Subsequently, a stable cell line, K562-C/EBPα, was constructed. Cell proliferation was assayed with cell counting kit-8, and mRNA levels of C/EBPα, forkhead transcription factor FKHRL1 (Foxo3a) and Bim were detected by semiquantitative PCR. The correlation of C/EBPα and BCR-ABL was assessed by Spearman's correlation analysis. The results showed that C/EBPα mRNA levels were significantly reduced in CML patients compared with healthy subjects (p < 0.001) and were negatively correlated with BCR-ABL1 (r = -0.5046, p < 0.01). Additionally, imatinib enhanced the expression of C/EBPα in K562 cells compared with untreated cells (p < 0.05). Overexpression of C/EBPα significantly decreased cell proliferation and upregulated the expressions of the apoptosis-related genes Foxo3a (p < 0.01) and Bim (p < 0.05) in K562 cells. In conclusion, C/EBPα expression was decreased in patients with CML. Imatinib enhances the expression of C/EBPα in K562 cells, and the overexpression of C/EBPα inhibits cell proliferation and increases apoptosis via the Foxo3a-Bim pathway.
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Affiliation(s)
- Guili Zhang
- Department of Laboratory, Yantai Yuhuangding Hospital, Medical College, Qingdao University, Yantai, China
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