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Ma XX, Zhou XY, Feng MG, Ji YT, Song FF, Tang QC, He Q, Zhang YF. Dual Role of IGF2BP2 in Osteoimmunomodulation during Periodontitis. J Dent Res 2024; 103:208-217. [PMID: 38193302 DOI: 10.1177/00220345231216115] [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] [Indexed: 01/10/2024] Open
Abstract
Periodontitis is a complex disease characterized by distinct inflammatory stages, with a peak of inflammation in the early phase and less prominent inflammation in the advanced phase. The insulin-like growth factor 2-binding proteins 2 (IGF2BP2) has recently been identified as a new m6A reader that protects m6A-modified messenger RNAs (mRNAs) from decay, thus participating in multiple biological processes. However, its role in periodontitis remains unexplored. Here, we investigated the role of IGF2BP2 in inflammation and osteoclast differentiation using a ligature-induced periodontitis model. Our findings revealed that IGF2BP2 responded to bacterial-induced inflammatory stimuli and exhibited differential expression patterns in early and advanced periodontitis stages, suggesting its dual role in regulating this disease. Depletion of Igf2bp2 contributed to increased release of inflammatory cytokines, thereby exacerbating periodontitis after 3 d of ligature while suppressing osteoclast differentiation and ameliorating periodontitis after 14 d of ligature. Mechanistically, we demonstrated that IGF2BP2 directly interacted with Cd5l and Cd36 mRNA via RNA immunoprecipitation assay. Overexpression of CD36 or recombinant CD5L rescued the osteoclast differentiation ability of Igf2bp2-null cells upon lipopolysaccharide stimulus, and thus the downregulation of Cd36 and Cd5l effectively reversed periodontitis in the advanced stage. Altogether, this study deepens our understanding of the potential mechanistic link among the dysregulated m6A reader IGF2BP2, immunomodulation, and osteoclastogenesis during different stages of periodontitis.
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Affiliation(s)
- X X Ma
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, Key Laboratory of Oral Biomedicine Ministry of Education, Hubei Key Laboratory of Stomatology, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - X Y Zhou
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, Key Laboratory of Oral Biomedicine Ministry of Education, Hubei Key Laboratory of Stomatology, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - M G Feng
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, Key Laboratory of Oral Biomedicine Ministry of Education, Hubei Key Laboratory of Stomatology, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Y T Ji
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, Key Laboratory of Oral Biomedicine Ministry of Education, Hubei Key Laboratory of Stomatology, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - F F Song
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, Key Laboratory of Oral Biomedicine Ministry of Education, Hubei Key Laboratory of Stomatology, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Q C Tang
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, Key Laboratory of Oral Biomedicine Ministry of Education, Hubei Key Laboratory of Stomatology, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Q He
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, Key Laboratory of Oral Biomedicine Ministry of Education, Hubei Key Laboratory of Stomatology, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Y F Zhang
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, Key Laboratory of Oral Biomedicine Ministry of Education, Hubei Key Laboratory of Stomatology, School & Hospital of Stomatology, Wuhan University, Wuhan, China
- Medical Research Institute, School of Medicine, Wuhan University, Wuhan, China
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Zou D, Lv M, Chen Y, Niu T, Ma C, Shi C, Huang Z, Wu Y, Yang S, Wang Y, Wu N, Zhang Y, Ouyang G, Mu Q. Down-regulation of Musashi-2 exerts antileukemic effects on acute lymphoblastic leukemia cells and increases sensitivity to dexamethasone. Ann Hematol 2024; 103:141-151. [PMID: 37749318 DOI: 10.1007/s00277-023-05468-z] [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: 12/06/2022] [Accepted: 09/18/2023] [Indexed: 09/27/2023]
Abstract
Musashi-2 (MSI2), implicated in the oncogenesis and propagation of a broad array of malignancies, inclusive of certain leukemia, remains a nascent field of study within the context of acute lymphoblastic leukemia (ALL). Using lentiviral transfection, ALL cells with stable MSI2 knockdown were engineered. A suite of analytic techniques - a CCK-8 assay, flow cytometry, qRT-PCR, and western blotting - were employed to evaluate cellular proliferation, cell cycle arrest, and apoptosis and to confirm differential gene expression. The suppression of MSI2 expression yielded significant results: inhibition of cell proliferation, G0/G1 cell cycle arrest, and induced apoptosis in ALL cell lines. Furthermore, it was noted that MSI2 inhibition heightened the responsiveness of ALL cells to dexamethasone. Significantly, the depletion of MSI2 prompted the translocation of GR from the cytoplasm to the nucleus upon dexamethasone treatment, consequently leading to enhanced sensitivity. Additionally, the FOXO1/4 signaling pathway contributed to the biological effects of ALL cells evoked by MSI2 silencing. Our study offers novel insight into the inhibitory effects of MSI2 suppression on ALL cells, positing MSI2 as a promising therapeutic target in the treatment of ALL.
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Affiliation(s)
- Duobing Zou
- Laboratory of Stem Cell Transplantation, Ningbo First Hospital, Ningbo, Zhejiang, 315000, People's Republic of China
| | - Mei Lv
- Department of Hematology, Ningbo Chinese Medical Hospital, Ningbo, Zhejiang, 315000, People's Republic of China
| | - Ying Chen
- Laboratory of Stem Cell Transplantation, Ningbo First Hospital, Ningbo, Zhejiang, 315000, People's Republic of China
| | - Tingting Niu
- Laboratory of Stem Cell Transplantation, Ningbo First Hospital, Ningbo, Zhejiang, 315000, People's Republic of China
| | - Chao Ma
- Laboratory of Stem Cell Transplantation, Ningbo First Hospital, Ningbo, Zhejiang, 315000, People's Republic of China
| | - Cong Shi
- Laboratory of Stem Cell Transplantation, Ningbo First Hospital, Ningbo, Zhejiang, 315000, People's Republic of China
| | - Zhenya Huang
- Laboratory of Stem Cell Transplantation, Ningbo First Hospital, Ningbo, Zhejiang, 315000, People's Republic of China
| | - Ying Wu
- Laboratory of Stem Cell Transplantation, Ningbo First Hospital, Ningbo, Zhejiang, 315000, People's Republic of China
| | - Shujun Yang
- Department of Hematology, Ningbo First Hospital, Ningbo, Zhejiang, 315000, People's Republic of China
| | - Yun Wang
- Laboratory of Stem Cell Transplantation, Ningbo First Hospital, Ningbo, Zhejiang, 315000, People's Republic of China
| | - Ningning Wu
- Laboratory of Stem Cell Transplantation, Ningbo First Hospital, Ningbo, Zhejiang, 315000, People's Republic of China
| | - Yi Zhang
- Laboratory of Stem Cell Transplantation, Ningbo First Hospital, Ningbo, Zhejiang, 315000, People's Republic of China
| | - Guifang Ouyang
- Department of Hematology, Ningbo First Hospital, Ningbo, Zhejiang, 315000, People's Republic of China.
| | - Qitian Mu
- Laboratory of Stem Cell Transplantation, Ningbo First Hospital, Ningbo, Zhejiang, 315000, People's Republic of China.
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Jiang M, Song Y, Ren MX, He RC, Dong XH, Li XH, Lu ZF, Li S, Wu J, Bei YR, Liu F, Long Y, Wu SG, Liu XH, Wu LM, Yang HL, McVey DG, Dai XY, Ye S, Hu YW. LncRNA NIPA1-SO confers atherosclerotic protection by suppressing the transmembrane protein NIPA1. J Adv Res 2023; 54:29-42. [PMID: 36736696 DOI: 10.1016/j.jare.2023.01.017] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Revised: 10/10/2022] [Accepted: 01/20/2023] [Indexed: 02/05/2023] Open
Abstract
Long non-coding RNAs (lncRNAs) are emerging as important players in gene regulation and cardiovascular diseases. However, the roles of lncRNAs in atherosclerosis are poorly understood. In the present study, we found that the levels of NIPA1-SO were decreased while those of NIPA1 were increased in human atherosclerotic plaques. Furthermore, NIPA1-SO negatively regulated NIPA1 expression in human umbilical vein endothelial cells (HUVECs). Mechanistically, NIPA1-SO interacted with the transcription factor FUBP1 and the NIPA1 gene. The effect of NIPA1-SO on NIPA1 protein levels was reversed by the knockdown of FUBP1. NIPA1-SO overexpression increased, whilst NIPA1-SO knockdown decreased BMPR2 levels; these effects were enhanced by the knockdown of NIPA1. The overexpression of NIPA1-SO reduced while NIPA1-SO knockdown increased monocyte adhesion to HUVECs; these effects were diminished by the knockdown of BMPR2. The lentivirus-mediated-overexpression of NIPA1-SO or gene-targeted knockout of NIPA1 in low-density lipoprotein receptor-deficient mice reduced monocyte-endothelium adhesion and atherosclerotic lesion formation. Collectively, these findings revealed a novel anti-atherosclerotic role for the lncRNA NIPA1-SO and highlighted its inhibitory effects on vascular inflammation and intracellular cholesterol accumulation by binding to FUBP1 and consequently repressing NIPA1 expression.
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Affiliation(s)
- Min Jiang
- Department of Clinical Laboratory, Guangzhou Women & Children Medical Center, Guangzhou Medical University, Guangzhou 510620, China
| | - Yu Song
- Department of Clinical Laboratory, Guangzhou Women & Children Medical Center, Guangzhou Medical University, Guangzhou 510620, China
| | - Mei-Xia Ren
- Shengli Clinical Medical College of Fujian Medical University, Fujian Medical University, Fuzhou 350001, China; Department of Geriatric Medicine, Fujian Provincial Hospital, Fujian Key Laboratory of Geriatrics, Fujian Provincial Center for Geriatrics, Fuzhou 350013, China
| | - Run-Chao He
- Department of Clinical Laboratory, Guangzhou Women & Children Medical Center, Guangzhou Medical University, Guangzhou 510620, China
| | - Xian-Hui Dong
- Department of Clinical Laboratory, Guangzhou Women & Children Medical Center, Guangzhou Medical University, Guangzhou 510620, China
| | - Xue-Heng Li
- Laboratory Medicine Center, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Zhi-Feng Lu
- Laboratory Medicine Center, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Shu Li
- Department of Clinical Laboratory, Guangzhou Women & Children Medical Center, Guangzhou Medical University, Guangzhou 510620, China
| | - Jia Wu
- Department of Clinical Laboratory, Guangzhou Women & Children Medical Center, Guangzhou Medical University, Guangzhou 510620, China
| | - Yan-Rou Bei
- Laboratory Medicine Center, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Fei Liu
- Department of Clinical Laboratory, Guangzhou Women & Children Medical Center, Guangzhou Medical University, Guangzhou 510620, China
| | - Yan Long
- Department of Clinical Laboratory, Guangzhou Women & Children Medical Center, Guangzhou Medical University, Guangzhou 510620, China
| | - Shao-Guo Wu
- Department of Clinical Laboratory, Guangzhou Twelfth People's Hospital, Guangzhou 510620, China
| | - Xue-Hui Liu
- Department of Clinical Laboratory, Guangzhou Twelfth People's Hospital, Guangzhou 510620, China
| | - Li-Mei Wu
- Department of Clinical Laboratory, Guangzhou Twelfth People's Hospital, Guangzhou 510620, China
| | - Hong-Ling Yang
- Department of Clinical Laboratory, Guangzhou Women & Children Medical Center, Guangzhou Medical University, Guangzhou 510620, China
| | - David G McVey
- Department of Cardiovascular Sciences & NIHR Leicester Biomedical Research Centre, University of Leicester, Leicester LE3 9QP, UK
| | - Xiao-Yan Dai
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences, Guangzhou Medical University, Guangzhou, Guangdong 511436, China.
| | - Shu Ye
- Cardiovascular Translational Research Programme, National University of Singapore, Singapore; Shantou University Medical College, Shantou, China.
| | - Yan-Wei Hu
- Department of Clinical Laboratory, Guangzhou Women & Children Medical Center, Guangzhou Medical University, Guangzhou 510620, China; Laboratory Medicine Center, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China.
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Hu Z, Zhang F, Brenner M, Jacob A, Wang P. The protective effect of H151, a novel STING inhibitor, in renal ischemia-reperfusion-induced acute kidney injury. Am J Physiol Renal Physiol 2023; 324:F558-F567. [PMID: 37102684 PMCID: PMC10228668 DOI: 10.1152/ajprenal.00004.2023] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 04/12/2023] [Accepted: 04/24/2023] [Indexed: 04/28/2023] Open
Abstract
Renal ischemia-reperfusion (RIR)-induced acute kidney injury (AKI) is a common renal functional disorder with high morbidity and mortality. Stimulator of interferon (IFN) genes (STING) is the cytosolic DNA-activated signaling pathway that mediates inflammation and injury. Our recent study showed that extracellular cold-inducible RNA-binding protein (eCIRP), a newly identified damage-associated molecular pattern, activates STING and exacerbates hemorrhagic shock. H151 is a small molecule that selectively binds to STING and inhibits STING-mediated activity. We hypothesized that H151 attenuates eCIRP-induced STING activation in vitro and inhibits RIR-induced AKI in vivo. In vitro, renal tubular epithelial cells incubated with eCIRP showed increased levels of IFN-β, STING pathway downstream cytokine, IL-6, tumor necrosis factor-α, and neutrophil gelatinase-associated lipocalin, whereas coincubation with eCIRP and H151 diminished those increases in a dose-dependent manner. In vivo, 24 h after bilateral renal ischemia-reperfusion, glomerular filtration rate was decreased in RIR-vehicle-treated mice, whereas glomerular filtration rate was unchanged in RIR-H151-treated mice. In contrast to sham, serum blood urea nitrogen, creatinine, and neutrophil gelatinase-associated lipocalin were increased in RIR-vehicle, but in RIR-H151, these levels were significantly decreased from RIR-vehicle. In contrast to sham, kidney IFN-β mRNA, histological injury score, and TUNEL staining were also increased in RIR-vehicle, but in RIR-H151, these levels were significantly decreased from RIR-vehicle. Importantly, in contrast to sham, in a 10-day survival study, survival decreased to 25% in RIR-vehicle, but RIR-H151 had a survival of 63%. In conclusion, H151 inhibits eCIRP-induced STING activation in renal tubular epithelial cells. Therefore, STING inhibition by H151 can be a promising therapeutic intervention for RIR-induced AKI.NEW & NOTEWORTHY Renal ischemia-reperfusion (RIR)-induced acute kidney injury (AKI) is a common renal functional disorder with a high morbidity and mortality rate. Stimulator of interferon genes (STING) is the cytosolic DNA-activated signaling pathway responsible for mediating inflammation and injury. Extracellular cold-inducible RNA-binding protein (eCIRP) activates STING and exacerbates hemorrhagic shock. H151, a novel STING inhibitor, attenuated eCIRP-induced STING activation in vitro and inhibited RIR-induced AKI. H151 shows promise as a therapeutic intervention for RIR-induced AKI.
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Affiliation(s)
- Zhijian Hu
- Center for Immunology and Inflammation, Feinstein Institutes for Medical Research, Manhasset, New York, United States
| | - Fangming Zhang
- Center for Immunology and Inflammation, Feinstein Institutes for Medical Research, Manhasset, New York, United States
| | - Max Brenner
- Center for Immunology and Inflammation, Feinstein Institutes for Medical Research, Manhasset, New York, United States
- Department of Surgery, Zucker School of Medicine at Hofstra/Northwell, Hempstead, New York, United States
- Department of Molecular Medicine, Zucker School of Medicine at Hofstra/Northwell, Hempstead, New York, United States
| | - Asha Jacob
- Center for Immunology and Inflammation, Feinstein Institutes for Medical Research, Manhasset, New York, United States
- Department of Surgery, Zucker School of Medicine at Hofstra/Northwell, Hempstead, New York, United States
| | - Ping Wang
- Center for Immunology and Inflammation, Feinstein Institutes for Medical Research, Manhasset, New York, United States
- Department of Surgery, Zucker School of Medicine at Hofstra/Northwell, Hempstead, New York, United States
- Department of Molecular Medicine, Zucker School of Medicine at Hofstra/Northwell, Hempstead, New York, United States
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Zhou SM, Li JZ, Chen HQ, Zeng Y, Yuan WB, Shi Y, Wang N, Fan J, Zhang Z, Xu Y, Cao J, Liu WB. FTO-Nrf2 axis regulates bisphenol F-induced leydig cell toxicity in an m6A-YTHDF2-dependent manner. Environ Pollut 2023; 325:121393. [PMID: 36878272 DOI: 10.1016/j.envpol.2023.121393] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 02/19/2023] [Accepted: 03/02/2023] [Indexed: 06/18/2023]
Abstract
Studies have shown that Bisphenol F (BPF) as an emerging bisphenol pollutant also has caused many hazards to the reproductive systems of humans and animals. However, its specific mechanism is still unclear. The mouse TM3 Leydig cell was used to explore the mechanism of BPF-induced reproductive toxicity in this study. The results showed BPF (0, 20, 40 and 80 μM) exposure for 72 h significantly increased cell apoptosis and decreased cell viability. Correspondingly, BPF increased the expression of P53 and BAX, and decreased the expression of BCL2. Moreover, BPF significantly increased the intracellular ROS level in TM3 cells, and significantly decreased oxidative stress-related molecule Nrf2. BPF decreased the expression of FTO and YTHDF2, and increased the total cellular m6A level. ChIP results showed that AhR transcriptionally regulated FTO. Differential expression of FTO revealed that FTO reduced the apoptosis rate of BPF-exposed TM3 cells and increased the expression of Nrf2, MeRIP confirmed that overexpression of FTO reduced the m6A of Nrf2 mRNA. After differential expression of YTHDF2, it was found that YTHDF2 enhanced the stability of Nrf2, and RIP assay showed that YTHDF2 was bound to Nrf2 mRNA. Nrf2 agonist enhanced the protective effect of FTO on TM3 cells exposure to BPF. Our study is the first to demonstrate that AhR transcriptionally regulated FTO, and then FTO regulated Nrf2 in a m6A-modified manner through YTHDF2, thereby affecting apoptosis in BPF-exposed TM3 cells to induce reproductive damage. It provides new insights into the importance of FTO-YTHDF2-Nrf2 signaling axis in BPF-induced reproductive toxicity and provided a new idea for the prevention of male reproductive injury.
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Affiliation(s)
- Shi-Meng Zhou
- Institute of Toxicology, College of Preventive Medicine, Third Military Medical University, Chongqing, 400038, China; School of Public Health, China Medical University, Shenyang, Liaoning, 110122, China
| | - Jing-Zhi Li
- Institute of Toxicology, College of Preventive Medicine, Third Military Medical University, Chongqing, 400038, China
| | - Hong-Qiang Chen
- Institute of Toxicology, College of Preventive Medicine, Third Military Medical University, Chongqing, 400038, China; Department of Environmental Health, College of Preventive Medicine, Third Military Medical University, Chongqing, 400038, China
| | - Yong Zeng
- Institute of Toxicology, College of Preventive Medicine, Third Military Medical University, Chongqing, 400038, China; Department of Environmental Health, College of Preventive Medicine, Third Military Medical University, Chongqing, 400038, China
| | - Wen-Bo Yuan
- Institute of Toxicology, College of Preventive Medicine, Third Military Medical University, Chongqing, 400038, China
| | - Yu Shi
- Department of Environmental Health, College of Preventive Medicine, Third Military Medical University, Chongqing, 400038, China; College of Pharmacy & Bioengineering, Chongqing University of Technology, Chongqing, 400054, China
| | - Na Wang
- Department of Environmental Health, College of Preventive Medicine, Third Military Medical University, Chongqing, 400038, China; School of Public Health, Guizhou Medical University, Guiyang, Guizhou, 550025, China
| | - Jun Fan
- Institute of Toxicology, College of Preventive Medicine, Third Military Medical University, Chongqing, 400038, China
| | - Zhe Zhang
- Institute of Toxicology, College of Preventive Medicine, Third Military Medical University, Chongqing, 400038, China
| | - Yuanyuan Xu
- School of Public Health, China Medical University, Shenyang, Liaoning, 110122, China
| | - Jia Cao
- Institute of Toxicology, College of Preventive Medicine, Third Military Medical University, Chongqing, 400038, China
| | - Wen-Bin Liu
- Institute of Toxicology, College of Preventive Medicine, Third Military Medical University, Chongqing, 400038, China; Department of Environmental Health, College of Preventive Medicine, Third Military Medical University, Chongqing, 400038, China.
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Quintiens J, De Roover A, Cornelis FMF, Escribano-Núñez A, Sermon A, Pazmino S, Monteagudo S, Lories RJ. Hypoxia and Wnt signaling inversely regulate expression of chondroprotective molecule ANP32A in articular cartilage. Osteoarthritis Cartilage 2023; 31:507-518. [PMID: 36370958 DOI: 10.1016/j.joca.2022.10.019] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 09/30/2022] [Accepted: 10/21/2022] [Indexed: 11/11/2022]
Abstract
OBJECTIVES ANP32A is a key protector of cartilage health, via preventing oxidative stress and Wnt hyper-activation. We aimed to unravel how ANP32A is regulated in cartilage. METHODS A bioinformatics pipeline was applied to identify regulators of ANP32A. Pathways of interest were targeted to study their impact on ANP32A in in vitro cultures of the human chondrocyte C28/I2 cell-line and primary human articular chondrocytes (hACs) from up to five different donors, using Wnt-activator CHIR99021, hypoxia-mimetic IOX2 and a hypoxia chamber. ANP32A was evaluated using real-time quantitative polymerase chain reaction (RT-qPCR) and Western blot. In vivo, the effect of hypoxia was examined by immunohistochemistry in mice injected intra-articularly with IOX2 after destabilization of the medial meniscus. Effects of Wnt hyper-activation were investigated using Frzb-knockout mice and wild-type mice treated intra-articularly with CHIR99021. Wnt inhibition effects were assessed upon intra-articular injection of XAV939. RESULTS The hypoxia and Wnt signaling pathways were identified as networks controlling ANP32A expression. In vitro and in vivo experiments demonstrated increases in ANP32A upon hypoxic conditions (1.3-fold in hypoxia in C28/I2 cells with 95% confidence interval (CI) [1.11-1.54] and 1.90-fold in hACs [95% CI: 1.56-2] and 1.67-fold in ANP32A protein levels after DMM surgery with IOX2 injections [95% CI: 1.33-2.08]). Wnt hyper-activation decreased ANP32A in chondrocytes in vitro (1.23-fold decrease [95% CI: 1.02-1.49]) and in mice (1.45-fold decrease after CHIR99021 injection [95% CI: 1.22-1.72] and 1.41-fold decrease in Frzb-knockout mice [95% CI: 1.00-1.96]). Hypoxia and Wnt modulated ataxia-telangiectasia mutated serine/threonine kinase (ATM), an ANP32A target gene, in hACs (1.89-fold increase [95% CI: 1.38-2.60] and 1.41-fold decrease [95% CI: 1.02-1.96]). CONCLUSIONS Maintaining hypoxia and limiting Wnt activation sustain ANP32A and protect against osteoarthritis.
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Affiliation(s)
- J Quintiens
- Laboratory of Tissue Homeostasis and Disease, Skeletal Biology and Engineering Research Center, Department of Development and Regeneration, KU Leuven, Leuven, Belgium; Department of Rheumatology, University Hospitals Leuven, Leuven, Belgium.
| | - A De Roover
- Laboratory of Tissue Homeostasis and Disease, Skeletal Biology and Engineering Research Center, Department of Development and Regeneration, KU Leuven, Leuven, Belgium.
| | - F M F Cornelis
- Laboratory of Tissue Homeostasis and Disease, Skeletal Biology and Engineering Research Center, Department of Development and Regeneration, KU Leuven, Leuven, Belgium.
| | - A Escribano-Núñez
- Laboratory of Tissue Homeostasis and Disease, Skeletal Biology and Engineering Research Center, Department of Development and Regeneration, KU Leuven, Leuven, Belgium.
| | - A Sermon
- Department of Trauma Surgery, University Hospitals Leuven, Leuven, Belgium; Trauma Research and Innovation Center, Department of Development and Regeneration, KU Leuven, Leuven, Belgium.
| | - S Pazmino
- Clinical Research Unit, Skeletal Biology and Engineering Research Center, Department of Development and Regeneration, KU Leuven, Leuven, Belgium.
| | - S Monteagudo
- Laboratory of Tissue Homeostasis and Disease, Skeletal Biology and Engineering Research Center, Department of Development and Regeneration, KU Leuven, Leuven, Belgium.
| | - R J Lories
- Laboratory of Tissue Homeostasis and Disease, Skeletal Biology and Engineering Research Center, Department of Development and Regeneration, KU Leuven, Leuven, Belgium; Department of Rheumatology, University Hospitals Leuven, Leuven, Belgium.
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7
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Li JZ, Zhou SM, Yuan WB, Chen HQ, Zeng Y, Fan J, Zhang Z, Wang N, Cao J, Liu WB. RNA binding protein YTHDF1 mediates bisphenol S-induced Leydig cell damage by regulating the mitochondrial pathway of BCL2 and the expression of CDK2-CyclinE1. Environ Pollut 2023; 321:121144. [PMID: 36702435 DOI: 10.1016/j.envpol.2023.121144] [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] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 01/18/2023] [Accepted: 01/22/2023] [Indexed: 06/18/2023]
Abstract
Bisphenol S (BPS) causes reproductive adverse effects on humans and animals. However, the detailed mechanism is still unclear. This research aimed to clarify the role of RNA binding protein YTHDF1 in Leydig cell damage induced by BPS. The mouse TM3 Leydig cells were exposed to BPS of 0, 20, 40, and 80 μmol/L for 72 h. Results showed that TM3 Leydig cells apoptosis rate markedly increased in BPS exposure group. Meanwhile, the apoptosis-related molecule BCL2 protein level decreased significantly, and Caspase9, Caspase3, and BAX increased significantly. Moreover, the cell cycle was blocked in the G1/S phase, CDK2 and CyclinE1 were considerably down-regulated in BPS exposure groups, and the protein level of RNA binding protein YTHDF1 decreased sharply. Furthermore, after overexpression of YTHDF1, the cell viability significantly increased, and the apoptosis rate significantly decreased in TM3 Leydig cells. In the meantime, BCL2, CDK2, and CyclinE1 were significantly up-regulated, and BAX, Caspase9, and Caspase3 were significantly down-regulated. Conversely, interference with YTHDF1 decreased cell proliferation and promoted apoptosis. Importantly, overexpression of YTHDF1 alleviated the cell viability decrease induced by BPS, and interference with YTHDF1 exacerbated the situation. RIP assays showed that the binding of YTHDF1 to CDK2, CyclinE1, and BCL2 significantly increased after overexpressing YTHDF1. Collectively, our study suggested that YTHDF1 plays an essential role in BPS-induced TM3 Leydig cell damage by regulating CDK2-CyclinE1 and BCL2 mitochondrial pathway at the translational level.
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Affiliation(s)
- Jing-Zhi Li
- Institute of Toxicology, College of Preventive Medicine, Third Military Medical University (Army Medical University), Chongqing, 400038, China
| | - Shi-Meng Zhou
- Institute of Toxicology, College of Preventive Medicine, Third Military Medical University (Army Medical University), Chongqing, 400038, China; School of Public Health, China Medical University, Shenyang, Liaoning, 110122, China
| | - Wen-Bo Yuan
- Institute of Toxicology, College of Preventive Medicine, Third Military Medical University (Army Medical University), Chongqing, 400038, China
| | - Hong-Qiang Chen
- Institute of Toxicology, College of Preventive Medicine, Third Military Medical University (Army Medical University), Chongqing, 400038, China; Department of Environmental Health, College of Preventive Medicine, Third Military Medical University (Army Medical University), Chongqing, 400038, China
| | - Yong Zeng
- Institute of Toxicology, College of Preventive Medicine, Third Military Medical University (Army Medical University), Chongqing, 400038, China; Department of Environmental Health, College of Preventive Medicine, Third Military Medical University (Army Medical University), Chongqing, 400038, China
| | - Jun Fan
- Institute of Toxicology, College of Preventive Medicine, Third Military Medical University (Army Medical University), Chongqing, 400038, China
| | - Zhe Zhang
- Institute of Toxicology, College of Preventive Medicine, Third Military Medical University (Army Medical University), Chongqing, 400038, China
| | - Na Wang
- Department of Environmental Health, College of Preventive Medicine, Third Military Medical University (Army Medical University), Chongqing, 400038, China; School of Public Health, Guizhou Medical University, Guiyang, Guizhou, 550025, China
| | - Jia Cao
- Institute of Toxicology, College of Preventive Medicine, Third Military Medical University (Army Medical University), Chongqing, 400038, China
| | - Wen-Bin Liu
- Institute of Toxicology, College of Preventive Medicine, Third Military Medical University (Army Medical University), Chongqing, 400038, China; Department of Environmental Health, College of Preventive Medicine, Third Military Medical University (Army Medical University), Chongqing, 400038, China.
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8
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Zhang L, Jiang Z, Yang X, Qian Y, Wang M, Wu S, Li L, Jia F, Wang Z, Hu Z, Zhao M, Tang X, Li G, Shang H, Chen X, Wang W. A Totipotent "All-In-One" Peptide Sequentially Blocks Immune Checkpoint and Reverses the Immunosuppressive Tumor Microenvironment. Adv Mater 2023; 35:e2207330. [PMID: 36259590 DOI: 10.1002/adma.202207330] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Revised: 09/27/2022] [Indexed: 06/16/2023]
Abstract
Immune checkpoint blockade combined with reversal of the immunosuppressive tumor microenvironment (TME) can dramatically enhance anti-tumor immunity, which can be achieved by using multiple-agent therapy. However, the optimal dose and order of administration of different agents remain elusive. To address this dilemma, multiple agents are often grafted together to construct "all-in-one" totipotent drugs, but this usually comes at the cost of a lack of synergy between the agents. Herein, by comprehensively analyzing the conserved sites of the immune checkpoint and TME drug targets, peptide secondary structures, assembly properties, and other physicochemical properties, a high-content peptide library is designed. By using the "3D-molecular-evolution" screening strategy, an efficient and totipotent "all-in-one" peptide (TAP) is obtained, which possesses the abilities of self-assembling, blocking the PD-1/PD-L1 axis, inhibiting Rbm38-eIF4E complex formation, and activating p53. It is shown that in mice treated with TAP, with either subcutaneous tumors or patient-derived xenografts, PD-L1 is blocked, with increased activation of both T and NK cells whilst reversing the immunosuppressive TME. Moreover, TAP can mitigate tumor activity and suppress tumor growth, showing superior therapeutic effect over antibody-based drugs.
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Affiliation(s)
- Limin Zhang
- Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering, Ministry of Industry and Information Technology, Key Laboratory of Cluster Science of Ministry of Education, Beijing Key Laboratory of Photoelectronic/Electro-photonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081, P. R. China
| | - Zhenqi Jiang
- Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering, Ministry of Industry and Information Technology, Key Laboratory of Cluster Science of Ministry of Education, Beijing Key Laboratory of Photoelectronic/Electro-photonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081, P. R. China
- School of Medical Technology, Beijing Institute of Technology, Beijing, 100081, P.R. China
| | - Xi Yang
- Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering, Ministry of Industry and Information Technology, Key Laboratory of Cluster Science of Ministry of Education, Beijing Key Laboratory of Photoelectronic/Electro-photonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081, P. R. China
- Cancer Institute, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, P. R. China
| | - Yixia Qian
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
| | - Minxuan Wang
- Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering, Ministry of Industry and Information Technology, Key Laboratory of Cluster Science of Ministry of Education, Beijing Key Laboratory of Photoelectronic/Electro-photonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081, P. R. China
| | - Shang Wu
- Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering, Ministry of Industry and Information Technology, Key Laboratory of Cluster Science of Ministry of Education, Beijing Key Laboratory of Photoelectronic/Electro-photonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081, P. R. China
| | - Lingyun Li
- Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering, Ministry of Industry and Information Technology, Key Laboratory of Cluster Science of Ministry of Education, Beijing Key Laboratory of Photoelectronic/Electro-photonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081, P. R. China
| | - Fei Jia
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
| | - Zihua Wang
- Centre for Neuroscience Research, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, Fujian, 350108, P. R. China
| | - Zhiyuan Hu
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
| | - Minzhi Zhao
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
| | - Xiaoying Tang
- Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering, Ministry of Industry and Information Technology, Key Laboratory of Cluster Science of Ministry of Education, Beijing Key Laboratory of Photoelectronic/Electro-photonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081, P. R. China
| | - Gang Li
- Gastrointestinal Surgery, Shanxi Hospital of Traditional Chinese Medicine, Taiyuan, 030012, P. R. China
| | - Hanbing Shang
- Department of Surgery, Ruijin Hospital, Shanghai Jiaotong University, Shanghai, 200025, P. R. China
| | - Xiaoyuan Chen
- Engineering, Yong Loo Lin School of Medicine and Faculty of Engineering, National University of Singapore, Singapore, 119074, Singapore
- Clinical Imaging Research Centre, Centre for Translational Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117599, Singapore
- Nanomedicine Translational Research Program, NUS Center for Nanomedicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117597, Singapore
| | - Weizhi Wang
- Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering, Ministry of Industry and Information Technology, Key Laboratory of Cluster Science of Ministry of Education, Beijing Key Laboratory of Photoelectronic/Electro-photonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081, P. R. China
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9
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van der Linden RJ, Gerritsen JS, Liao M, Widomska J, Pearse RV, White FM, Franke B, Young-Pearse TL, Poelmans G. RNA-binding protein ELAVL4/HuD ameliorates Alzheimer's disease-related molecular changes in human iPSC-derived neurons. Prog Neurobiol 2022; 217:102316. [PMID: 35843356 PMCID: PMC9912016 DOI: 10.1016/j.pneurobio.2022.102316] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 05/18/2022] [Accepted: 07/12/2022] [Indexed: 11/26/2022]
Abstract
The RNA binding protein ELAVL4/HuD regulates the translation and splicing of multiple Alzheimer's disease (AD) candidate genes. We generated ELAVL4 knockout (KO) human induced pluripotent stem cell-derived neurons to study the effect that ELAVL4 has on AD-related cellular phenotypes. ELAVL4 KO significantly increased the levels of specific APP isoforms and intracellular phosphorylated tau, molecular changes that are related to the pathological hallmarks of AD. Overexpression of ELAVL4 in wild-type neurons and rescue experiments in ELAVL4 KO cells showed opposite effects and also led to a reduction of the extracellular amyloid-beta (Aβ)42/40 ratio. All these observations were made in familial AD (fAD) and fAD-corrected neurons. To gain insight into the molecular cascades involved in neuronal ELAVL4 signaling, we conducted pathway and upstream regulator analyses of transcriptomic and proteomic data from the generated neurons. These analyses revealed that ELAVL4 affects multiple biological pathways linked to AD, including those involved in synaptic function, as well as gene expression downstream of APP and tau signaling. The analyses also suggest that ELAVL4 expression is regulated by insulin receptor-FOXO1 signaling in neurons. Taken together, ELAVL4 expression ameliorates AD-related molecular changes in neurons and affects multiple synaptic pathways, making it a promising target for novel drug development.
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Affiliation(s)
- Robert J van der Linden
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, the Netherlands; Ann Romney Center for Neurologic Diseases, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Jacqueline S Gerritsen
- Koch Institute for Integrative Cancer Research; Center for Precision Cancer Medicine; Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Meichen Liao
- Ann Romney Center for Neurologic Diseases, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Joanna Widomska
- Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Richard V Pearse
- Ann Romney Center for Neurologic Diseases, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Forest M White
- Koch Institute for Integrative Cancer Research; Center for Precision Cancer Medicine; Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Barbara Franke
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, the Netherlands; Donders Institute for Brain, Cognition and Behaviour, Nijmegen, the Netherlands; Department of Psychiatry, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Tracy L Young-Pearse
- Ann Romney Center for Neurologic Diseases, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA.
| | - Geert Poelmans
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, the Netherlands.
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DING J, XING Y, CHEN Z, CHEN W, MA Z, XIE Y, ZHOU L. Qilan preparation inhibits proliferation and induces apoptosis by down-regulating microRNA-21 in human Tca8113 tongue squamous cell carcinoma cells. J TRADIT CHIN MED 2022; 42:693-700. [PMID: 36083475 PMCID: PMC9924750 DOI: 10.19852/j.cnki.jtcm.2022.05.003] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/16/2023]
Abstract
OBJECTIVE The aim of this study was to examine the antitumor effects of Qilan preparation on oral squamous cell carcinoma (OSCC) and to investigate its underlying mechanisms of action. METHODS Cell proliferation, cell cycle distribution and apoptosis were examined using cell counting kit-8 (CCK8) and flow cytometry (FCM). The expression of PTEN and PDCD4 were determined by western blot. Changes in miR-21 levels were quantified using TaqMan stem-loop real-time PCR. After miR-21 was transiently transfected into Tca8113 cells using Lipofectamine®3000, cell proliferation, apoptosis and miR-21 and PDCD4 expression levels were measured. RESULTS Qilan preparation inhibited Tca8113 cell growth in a dose- and time-dependent manner by inducing apoptosis and cell cycle arrest in S-phase, decreasing miR-21 levels and increasing PTEN and PDCD4 expression. MiR-21 overexpression reversed the Qilan preparation-induced suppression of cell proliferation and induction of apoptosis while also blocking the increase in PDCD4. CONCLUSIONS Our study revealed, for the first time, the ability of Qilan preparation to suppress TSCC cell growth and elucidated that Qilan preparation elicits its anti-cancer actions either the miR-21/PDCD4 or PTEN pathway.
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Affiliation(s)
- Jiamin DING
- 1 Department of Oral Mucosal Diseases, Affiliated Stomatological Hospital of Fujian Medical University, Fuzhou 350000, China
| | - Yifeng XING
- 2 School and Hospital of Stomatology, Fujian Medical University, Fuzhou 350000, China
| | - Zuoliang CHEN
- 3 Department of Oral Mucosal Diseases, Xiamen Stomatological Hospital, School of Stomatology, Fujian Medical University, Xiamen 361003, China
| | - Wanlu CHEN
- 1 Department of Oral Mucosal Diseases, Affiliated Stomatological Hospital of Fujian Medical University, Fuzhou 350000, China
| | - Zhongxiong MA
- 1 Department of Oral Mucosal Diseases, Affiliated Stomatological Hospital of Fujian Medical University, Fuzhou 350000, China
| | - Yunde XIE
- 1 Department of Oral Mucosal Diseases, Affiliated Stomatological Hospital of Fujian Medical University, Fuzhou 350000, China
| | - Lin ZHOU
- 4 Department of Implantology, Affiliated Stomatological Hospital of Fujian Medical University, Fuzhou 350001, China
- ZHOU Lin, Department of Implantology, Affiliated Stomatological Hospital of Fujian Medical University, Fuzhou 350001, China. : +86-591-83754882
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11
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Sun YT, Cai JH, Bao S. Overexpression of lncRNA HCP5 in human umbilical cord mesenchymal stem cell-derived exosomes promoted the proliferation and inhibited the apoptosis of ovarian granulosa cells via the musashi RNA-binding protein 2/oestrogen receptor alpha 1 axis. Endocr J 2022; 69:1117-1129. [PMID: 35545536 DOI: 10.1507/endocrj.ej21-0653] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
HCP5 has been reported to be downregulated in ovarian granulosa cells (OGCs) and to facilitate cell proliferation. Human umbilical cord mesenchymal stem cell exosome (hucMSCs-exo) treatment can prevent OGCs apoptosis in vitro. However, the functional mechanism of HCP5 and hucMSCs-exo requires further exploration. Fluorescence-activated cell sorting (FACS) was performed to measure the expression of markers related to hucMSCs. The osteogenic and adipogenic potential of hucMSCs was measured by alkaline phosphatase (ALP) and Alizarin red and by oil red-O staining, respectively. Real-time quantitative polymerase chain reaction (RT-qPCR) and Western blotting were used to detect the mRNA and protein levels, respectively. Cell proliferation and apoptosis were measured by Cell Counting Kit-8 (CCK-8) assay, colony formation assay and flow cytometry. The interaction of HCP5/musashi RNA-binding protein 2 (MSI2) and oestrogen receptor alpha 1 (ESR1) mRNA was analysed using RNA pulldown and RIP assays. HucMSCs and exosomes were successfully isolated and identified. HucMSC-derived exosomes promoted the proliferation of OGCs and ESR1 expression and inhibited cell apoptosis. HCP5 overexpression in exosomes further enhanced these effects. MSI2 knockdown led to the opposite results. HCP5 targeted MSI2, and MSI2 knockdown reduced the decreases in HCP5 and ESR1 expression. Mechanistically, HCP5 in HucMSC-derived exosomes promoted ESR1 expression by binding to MSI2, which promoted the proliferation of OGCs.
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Affiliation(s)
- Yu-Ting Sun
- Hainan Medical University, Haikou 571199, Hainan Province, China
| | - Jun-Hong Cai
- Central Laboratory, Hainan General Hospital/Hainan Affiliated Hospital of Hainan Medical University, Haikou 570311, Hainan Province, China
| | - Shan Bao
- Department of Gynaecology and Obstetrics, Hainan Affiliated Hospital of Hainan Medical University/Hainan General Hospital, Haikou 570311, Hainan Province, China
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12
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Xue G, Braczyk K, Gonçalves-Carneiro D, Dawidziak DM, Sanchez K, Ong H, Wan Y, Zadrozny KK, Ganser-Pornillos BK, Bieniasz PD, Pornillos O. Poly(ADP-ribose) potentiates ZAP antiviral activity. PLoS Pathog 2022; 18:e1009202. [PMID: 35130321 PMCID: PMC8853533 DOI: 10.1371/journal.ppat.1009202] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Revised: 02/17/2022] [Accepted: 01/12/2022] [Indexed: 12/13/2022] Open
Abstract
Zinc-finger antiviral protein (ZAP), also known as poly(ADP-ribose) polymerase 13 (PARP13), is an antiviral factor that selectively targets viral RNA for degradation. ZAP is active against both DNA and RNA viruses, including important human pathogens such as hepatitis B virus and type 1 human immunodeficiency virus (HIV-1). ZAP selectively binds CpG dinucleotides through its N-terminal RNA-binding domain, which consists of four zinc fingers. ZAP also contains a central region that consists of a fifth zinc finger and two WWE domains. Through structural and biochemical studies, we found that the fifth zinc finger and tandem WWEs of ZAP combine into a single integrated domain that binds to poly(ADP-ribose) (PAR), a cellular polynucleotide. PAR binding is mediated by the second WWE module of ZAP and likely involves specific recognition of an adenosine diphosphate-containing unit of PAR. Mutation of the PAR binding site in ZAP abrogates the interaction in vitro and diminishes ZAP activity against a CpG-rich HIV-1 reporter virus and murine leukemia virus. In cells, PAR facilitates formation of non-membranous sub-cellular compartments such as DNA repair foci, spindle poles and cytosolic RNA stress granules. Our results suggest that ZAP-mediated viral mRNA degradation is facilitated by PAR, and provides a biophysical rationale for the reported association of ZAP with RNA stress granules.
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Affiliation(s)
- Guangai Xue
- Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, Virginia, United States of America
| | - Klaudia Braczyk
- Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, Virginia, United States of America
| | - Daniel Gonçalves-Carneiro
- Laboratory of Retrovirology, Howard Hughes Medical Institute, The Rockefeller University, New York, New York, United States of America
| | - Daria M. Dawidziak
- Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, Virginia, United States of America
| | - Katarzyna Sanchez
- Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, Virginia, United States of America
| | - Heley Ong
- Laboratory of Retrovirology, Howard Hughes Medical Institute, The Rockefeller University, New York, New York, United States of America
| | - Yueping Wan
- Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, Virginia, United States of America
| | - Kaneil K. Zadrozny
- Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, Virginia, United States of America
| | - Barbie K. Ganser-Pornillos
- Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, Virginia, United States of America
| | - Paul D. Bieniasz
- Laboratory of Retrovirology, Howard Hughes Medical Institute, The Rockefeller University, New York, New York, United States of America
| | - Owen Pornillos
- Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, Virginia, United States of America
- * E-mail:
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Wang X, Li Y, Li J, Li S, Wang F. Mechanism of METTL3-Mediated m6A Modification in Cardiomyocyte Pyroptosis and Myocardial Ischemia–Reperfusion Injury. Cardiovasc Drugs Ther 2022; 37:435-448. [PMID: 35066738 DOI: 10.1007/s10557-021-07300-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 12/08/2021] [Indexed: 12/18/2022]
Abstract
OBJECTIVE Myocardial ischemia/reperfusion (MI/R) injury is a complicated pathophysiological process associated with cardiomyocyte pyroptosis. Methyltransferase-like protein 3 (METTL3) catalyzes the formation of N6-methyl-adenosine (m6A) and participates in various biological processes. This study probed into the mechanism of METTL3 in cardiomyocyte pyroptosis in MI/R injury. METHODS A rat model of MI/R was established. Rat cardiomyocytes were subjected to oxygen-glucose deprivation/reoxygenation (OGD/R) treatment for the establishment of a cell model in vitro. METTL3 expression in myocardial tissues of MI/R rats and OGD/R-treated cardiomyocytes was determined using RT-qPCR and Western blot. The pathological changes of rat myocardial tissues were observed using hematoxylin and eosin staining. The positive expression of NLRP3 in myocardial tissues or cardiomyocytes was observed through immunohistochemistry or immunofluorescence. The activity of caspase-1 was measured using the colorimetric method. The expressions of GSDMD and cleaved caspase-1, as well as the levels of IL-1β and IL-18 in rat myocardial tissues or cardiomyocytes were determined. m6A modification level was quantified. The binding relationship between pri-miR-143-3p and DGCR8 and the enrichment of m6A on pri-miR-143-3p were detected. The binding relationship between miR-143-3p and protein kinase C epsilon (PRKCE) was verified. RESULTS METTL3 expression was elevated in MI/R rats and OGD/R cardiomyocytes. METTL3 silencing alleviated myocardial injury, reduced the number of NLRP3-positive cardiomyocytes, suppressed caspase-1 activity, decreased the protein levels of GSDMD-N and cleaved caspase-1, and decreased IL-1β and IL-18 levels. METTL3 increased the total m6A level in MI/R rats and injured cardiomyocytes, promoted DGCR8 binding to pri-miR-143-3p, and enhanced miR-143-3p expression. miR-143-3p suppressed PRKCE transcription, and miR-143-3p overexpression reversed the inhibitory effect of METTL3 silencing on cardiomyocyte pyroptosis. CONCLUSION METTL3 promoted DGCR8 binding to pri-miR-143-3p through m6A modification, thus enhancing miR-143-3p expression to inhibit PRKCE transcription and further aggravating cardiomyocyte pyroptosis and MI/R injury.
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Affiliation(s)
- Xiang Wang
- Department of Cardiology, Institute of Geriatric Medicine, Beijing Hospital, National Center of Gerontology, Chinese Academy of Medical Sciences, Beijing, 100730, China
- Graduate School of Peking Union Medical College, Chinese Academy of Medical Science, Beijing, 100730, China
| | - Yi Li
- Department of Cardiology, Institute of Geriatric Medicine, Beijing Hospital, National Center of Gerontology, Chinese Academy of Medical Sciences, Beijing, 100730, China
- Fifth School of Clinical Medicine, Peking University, Beijing Hospital, Beijing, 100730, China
| | - Jiahan Li
- The First Mobile Corps of People's Armed Police, Beijing, 101100, China
| | - Shiguo Li
- Department of Structural Heart Disease Center, National Center for Cardiovascular Diseases, Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100037, China.
| | - Fang Wang
- Department of Cardiology, Institute of Geriatric Medicine, Beijing Hospital, National Center of Gerontology, Chinese Academy of Medical Sciences, Beijing, 100730, China.
- Graduate School of Peking Union Medical College, Chinese Academy of Medical Science, Beijing, 100730, China.
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14
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Zhu Y, Zhou B, Hu X, Ying S, Zhou Q, Xu W, Feng L, Hou T, Wang X, Zhu L, Jin H. LncRNA LINC00942 promotes chemoresistance in gastric cancer by suppressing MSI2 degradation to enhance c-Myc mRNA stability. Clin Transl Med 2022; 12:e703. [PMID: 35073459 PMCID: PMC8785984 DOI: 10.1002/ctm2.703] [Citation(s) in RCA: 38] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 12/20/2021] [Accepted: 12/29/2021] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Chemoresistance to cisplatin (DDP) remains a major challenge in advanced gastric cancer (GC) treatment. Although accumulating evidence suggests an association between dysregulation of long non-coding RNAs (lncRNAs) and chemoresistance, the regulatory functions and complexities of lncRNAs in modulating DDP-based chemotherapy in GC remain under-investigated. This study was designed to explore the critical chemoresistance-related lncRNAs in GC and identify novel therapeutic targets for patients with chemoresistant GC. METHODS Chemoresistance-related lncRNAs were identified through microarray and verified through a quantitative real-time polymerase chain reaction (qRT-PCR). Proteins bound by lncRNAs were identified through a human proteome array and validated through RNA immunoprecipitation (RIP) and RNA pull-down assays. Co-immunoprecipitation and ubiquitination assays were performed to explore the molecular mechanisms of the Musashi2 (MSI2) post-modification. The effects of LINC00942 (LNC942) and MSI2 on DDP-based chemotherapy were investigated through MTS, apoptosis assays and xenograft tumour formation in vivo. RESULTS LNC942 was found to be up-regulated in chemoresistant GC cells, and its high expression was positively correlated with the poor prognosis of patients with GC. Functional studies indicated that LNC942 confers chemoresistance to GC cells by impairing apoptosis and inducing stemness. Mechanically, LNC942 up-regulated the MSI2 expression by preventing its interaction with SCFβ-TRCP E3 ubiquitin ligase, eventually inhibiting ubiquitination. Then, LNC942 stabilized c-Myc mRNA in an N6-methyladenosine (m6 A)-dependent manner. As a potential m6 A recognition protein, MSI2 stabilized c-Myc mRNA with m6 A modifications. Moreover, inhibition of the LNC942-MSI2-c-Myc axis was found to restore chemosensitivity both in vitro and in vivo. CONCLUSIONS These results uncover a chemoresistant accelerating function of LNC942 in GC, and disrupting the LNC942-MSI2-c-Myc axis could be a novel therapeutic strategy for GC patients undergoing chemoresistance.
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Affiliation(s)
- Yiran Zhu
- Laboratory of Cancer Biology, Key Laboratory of Biotherapy in Zhejiang ProvinceCancer Center of Zhejiang University, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang UniversityHangzhouChina
| | - Bingluo Zhou
- Laboratory of Cancer Biology, Key Laboratory of Biotherapy in Zhejiang ProvinceCancer Center of Zhejiang University, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang UniversityHangzhouChina
| | - Xinyang Hu
- Laboratory of Cancer Biology, Key Laboratory of Biotherapy in Zhejiang ProvinceCancer Center of Zhejiang University, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang UniversityHangzhouChina
| | - Shilong Ying
- Laboratory of Cancer Biology, Key Laboratory of Biotherapy in Zhejiang ProvinceCancer Center of Zhejiang University, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang UniversityHangzhouChina
| | - Qiyin Zhou
- Department of Medical Oncology, Sir Run Run Shaw Hospital, School of MedicineZhejiang UniversityHangzhouChina
| | - Wenxia Xu
- Laboratory of Cancer Biology, Key Laboratory of Biotherapy in Zhejiang ProvinceCancer Center of Zhejiang University, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang UniversityHangzhouChina
| | - Lifeng Feng
- Laboratory of Cancer Biology, Key Laboratory of Biotherapy in Zhejiang ProvinceCancer Center of Zhejiang University, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang UniversityHangzhouChina
| | - Tianlun Hou
- Department of Clinical MedicineWenzhou Medical UniversityWenzhouChina
| | - Xian Wang
- Department of Medical Oncology, Sir Run Run Shaw Hospital, School of MedicineZhejiang UniversityHangzhouChina
| | - Liyuan Zhu
- Laboratory of Cancer Biology, Key Laboratory of Biotherapy in Zhejiang ProvinceCancer Center of Zhejiang University, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang UniversityHangzhouChina
| | - Hongchuan Jin
- Laboratory of Cancer Biology, Key Laboratory of Biotherapy in Zhejiang ProvinceCancer Center of Zhejiang University, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang UniversityHangzhouChina
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15
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Kmiec D, Lista MJ, Ficarelli M, Swanson CM, Neil SJD. S-farnesylation is essential for antiviral activity of the long ZAP isoform against RNA viruses with diverse replication strategies. PLoS Pathog 2021; 17:e1009726. [PMID: 34695163 PMCID: PMC8568172 DOI: 10.1371/journal.ppat.1009726] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 11/04/2021] [Accepted: 10/07/2021] [Indexed: 11/18/2022] Open
Abstract
The zinc finger antiviral protein (ZAP) is a broad inhibitor of virus replication. Its best-characterized function is to bind CpG dinucleotides present in viral RNAs and, through the recruitment of TRIM25, KHNYN and other cofactors, target them for degradation or prevent their translation. The long and short isoforms of ZAP (ZAP-L and ZAP-S) have different intracellular localization and it is unclear how this regulates their antiviral activity against viruses with different sites of replication. Using ZAP-sensitive and ZAP-insensitive human immunodeficiency virus type I (HIV-1), which transcribe the viral RNA in the nucleus and assemble virions at the plasma membrane, we show that the catalytically inactive poly-ADP-ribose polymerase (PARP) domain in ZAP-L is essential for CpG-specific viral restriction. Mutation of a crucial cysteine in the C-terminal CaaX box that mediates S-farnesylation and, to a lesser extent, the residues in place of the catalytic site triad within the PARP domain, disrupted the activity of ZAP-L. Addition of the CaaX box to ZAP-S partly restored antiviral activity, explaining why ZAP-S lacks antiviral activity for CpG-enriched HIV-1 despite conservation of the RNA-binding domain. Confocal microscopy confirmed the CaaX motif mediated localization of ZAP-L to vesicular structures and enhanced physical association with intracellular membranes. Importantly, the PARP domain and CaaX box together jointly modulate the interaction between ZAP-L and its cofactors TRIM25 and KHNYN, implying that its proper subcellular localisation is required to establish an antiviral complex. The essential contribution of the PARP domain and CaaX box to ZAP-L antiviral activity was further confirmed by inhibition of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) replication, which replicates in double-membrane vesicles derived from the endoplasmic reticulum. Thus, compartmentalization of ZAP-L on intracellular membranes provides an essential effector function in ZAP-L-mediated antiviral activity against divergent viruses with different subcellular replication sites.
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Affiliation(s)
- Dorota Kmiec
- Department of Infectious Diseases, King’s College London, London, United Kingdom
| | - María José Lista
- Department of Infectious Diseases, King’s College London, London, United Kingdom
| | - Mattia Ficarelli
- Department of Infectious Diseases, King’s College London, London, United Kingdom
| | - Chad M. Swanson
- Department of Infectious Diseases, King’s College London, London, United Kingdom
| | - Stuart J. D. Neil
- Department of Infectious Diseases, King’s College London, London, United Kingdom
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Liao HQ, Zhou J, Cao Y, Nie YL, Li MQ, Zhou J. Vigilin interacts with ER-β to protect against palmitic acid-induced granulosa cells apoptosis via inhibiting calcineurin-mediated Drp1 signaling pathway. Steroids 2020; 163:108699. [PMID: 32687845 DOI: 10.1016/j.steroids.2020.108699] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Revised: 06/12/2020] [Accepted: 07/11/2020] [Indexed: 11/28/2022]
Abstract
BACKGROUND Hypercholesterolemia is one of the causes of female infertility, and as a common fatty acid in follicular fluid, palmitic acid (PA) level plays a vital role in granule cell which is closely related to the developmental potential of follicle. METHODS The ovarian granulosa cell-like human granulosa (KGN) cell line and the immortalized normal ovarian surface epithelial cell line (IOSE80) were used to verify the effect of PA on cell viability and apoptosis by MTT and flow cytometry assay, respectively. Then mitochondria damage was confirmed by mitochondrial membrane potential, mitochondrial ROS detection assay and western blot in KGN cells. Thorough luciferase reporter assay and RIP-qPCR, the relationship between vigilin and ER-β was investigated. RESULTS In our study, PA induced mitochondrial damage-mediated cell apoptosis of KGN cells was dose-dependently, while PA shown no effects on in IOSE80 cells. Then the role of calcineurin (CnA)-mediated Drp1 signaling pathway on KGN cells was confirmed by treating with Mdivi-1 or FK506T. In addition, the changed level of vigilin and ER-β was observed in cell apoptosis of KGN cells induced by PA. By transfecting vigilin vector or ER-β vector into KGN cells, respectively, vigilin and ER-β were demonstrated to regulate the apoptosis of KGN cells. And vigilin was a binding protein of ER-β mRNA. CONCLUSION Vigilin could interact with ER-β mRNA to promote ER-β expression. And Vigilin/ ER-β relieve the mitochondrial damage and cell apoptosis induced by PA through regulating CnA-mediated Drp1 signaling pathway, which revealed the mechanism and strategy of hypercholesterolemia in female infertility.
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Affiliation(s)
- Hong-Qing Liao
- The Second Affiliated Hospital of South China University, Hengyang 421001, PR China; Hengyang Nanhua-Xinghui Reproductive Health Hospital, Hengyang 421001, PR China
| | - Jun Zhou
- The Second Affiliated Hospital of South China University, Hengyang 421001, PR China; Hengyang Nanhua-Xinghui Reproductive Health Hospital, Hengyang 421001, PR China
| | - Yang Cao
- Hunan University of Technology and Business, Changsha 410205, PR China
| | - Yu-Lin Nie
- Hengyang Nanhua-Xinghui Reproductive Health Hospital, Hengyang 421001, PR China
| | - Mei-Qing Li
- The Second Affiliated Hospital of South China University, Hengyang 421001, PR China; Hengyang Nanhua-Xinghui Reproductive Health Hospital, Hengyang 421001, PR China
| | - Jing Zhou
- The Second Affiliated Hospital of South China University, Hengyang 421001, PR China; Hengyang Nanhua-Xinghui Reproductive Health Hospital, Hengyang 421001, PR China.
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Rungrojcharoenkit K, Sunintaboon P, Ellison D, Macareo L, Midoeng P, Chaisuwirat P, Fernandez S, Ubol S. Development of an adjuvanted nanoparticle vaccine against influenza virus, an in vitro study. PLoS One 2020; 15:e0237218. [PMID: 32760143 PMCID: PMC7410248 DOI: 10.1371/journal.pone.0237218] [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] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Accepted: 07/22/2020] [Indexed: 12/02/2022] Open
Abstract
Influenza is an infectious respiratory illness caused by influenza viruses. Despite yearly updates, the efficacy of influenza vaccines is significantly curtailed by the virus antigenic drift and antigenic shift. These constant changes to the influenza virus make-up also challenge the development of a universal flu vaccine, which requires conserved antigenic regions shared by influenza viruses of different subtypes. We propose that it is possible to bypass these challenges by the development of an influenza vaccine based on conserved proteins delivered in an adjuvanted nanoparticle system. In this study, we generated influenza nanoparticle constructs using trimethyl chitosan nanoparticles (TMC nPs) as the carrier of recombinant influenza hemagglutinin subunit 2 (HA2) and nucleoprotein (NP). The purified HA2 and NP recombinant proteins were encapsulated into TMC nPs to form HA2-TMC nPs and NP-TMC nPs, respectively. Primary human intranasal epithelium cells (HNEpCs) were used as an in vitro model to measure immunity responses. HA2-TMC nPs, NP-TMC nPs, and HA2-NP-TMC nPs (influenza nanoparticle constructs) showed no toxicity in HNEpCs. The loading efficiency of HA2 and NP into the TMC nPs was 97.9% and 98.5%, respectively. HA2-TMC nPs and NP-TMC nPs more efficiently delivered HA2 and NP proteins to HNEpCs than soluble HA2 and NP proteins alone. The induction of various cytokines and chemokines was more evident in influenza nanoparticle construct-treated HNEpCs than in soluble protein-treated HNEpCs. In addition, soluble factors secreted by influenza nanoparticle construct-treated HNEpCs significantly induced MoDCs maturation markers (CD80, CD83, CD86 and HLA-DR), as compared to soluble factors secreted by protein-treated HNEpCs. HNEpCs treated with the influenza nanoparticle constructs significantly reduced influenza virus replication in an in vitro challenge assay. The results indicate that TMC nPs can be used as influenza vaccine adjuvants and carriers capable of delivering HA2 and NP proteins to HNEpCs.
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Affiliation(s)
- Kamonthip Rungrojcharoenkit
- Department of Microbiology, Faculty of Science, Mahidol University, Bangkok, Thailand
- Department of Virology, Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand
| | - Panya Sunintaboon
- Department of Chemistry, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Damon Ellison
- Department of Virology, Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand
| | - Louis Macareo
- Department of Virology, Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand
| | - Panuwat Midoeng
- Division of Pathology, Army Institute of Pathology, Phramongkutklao Hospital, Bangkok, Thailand
| | - Preamrudee Chaisuwirat
- Division of Pathology, Army Institute of Pathology, Phramongkutklao Hospital, Bangkok, Thailand
| | - Stefan Fernandez
- Department of Virology, Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand
- * E-mail: (SF); (SU)
| | - Sukathida Ubol
- Department of Microbiology, Faculty of Science, Mahidol University, Bangkok, Thailand
- * E-mail: (SF); (SU)
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18
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Lee DD, Hochstetler A, Murphy C, Lowe CW, Schwarz MA. A distinct transcriptional profile in response to endothelial monocyte activating polypeptide II is partially mediated by JAK-STAT3 in murine macrophages. Am J Physiol Cell Physiol 2019; 317:C449-C456. [PMID: 31216192 PMCID: PMC6766611 DOI: 10.1152/ajpcell.00277.2018] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Revised: 06/11/2019] [Accepted: 06/16/2019] [Indexed: 12/24/2022]
Abstract
Macrophages are important responders to environmental changes such as secreted factors. Among the secreted factors in injured tissues, the highly conserved endothelial monocyte activating polypeptide II (EMAP II) has been characterized to limit vessel formation, to be locally expressed near sites of injury labeling it a "find-me" signal, and to recruit macrophages and neutrophils. The molecular mechanisms mediated by EMAP II within macrophages once they are recruited are unknown. In this study, using a model of partially activated, recruited thioglycollate-elicited peritoneal macrophages, a transient, transcription profile of key functional genes in macrophages exposed to EMAP II was characterized. We found that EMAP II-mediated changes were elicited mainly through signal transducer and activator of transcription 3 (STAT3) as evidenced by increased Y705 phosphorylation and changes in activity and upstream of it, Janus associated kinase (JAK)1/2 upstream. Both inhibition of JAK1/2 and knockdown of Stat3 abrogated a subset of genes that are upregulated by EMAP II. Our results identify a rapid EMAP II-mediated STAT3 activation that coincides with altered pro- and anti-inflammatory gene expression in macrophages.
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Affiliation(s)
- Daniel D Lee
- Department of Cellular and Integrative Physiology and Department of Pediatrics, Indiana University School of Medicine, South Bend, Indiana
| | - Alexandra Hochstetler
- Department of Cellular and Integrative Physiology and Department of Pediatrics, Indiana University School of Medicine, South Bend, Indiana
| | - Christina Murphy
- Department of Biological Sciences, University of Notre Dame, South Bend, Indiana
| | - Chinn-Woan Lowe
- Department of Cellular and Integrative Physiology and Department of Pediatrics, Indiana University School of Medicine, South Bend, Indiana
| | - Margaret A Schwarz
- Department of Cellular and Integrative Physiology and Department of Pediatrics, Indiana University School of Medicine, South Bend, Indiana
- Department of Chemistry and Biochemistry, University of Notre Dame, South Bend, Indiana
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19
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Law LMJ, Razooky BS, Li MMH, You S, Jurado A, Rice CM, MacDonald MR. ZAP's stress granule localization is correlated with its antiviral activity and induced by virus replication. PLoS Pathog 2019; 15:e1007798. [PMID: 31116799 PMCID: PMC6548403 DOI: 10.1371/journal.ppat.1007798] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Revised: 06/04/2019] [Accepted: 04/29/2019] [Indexed: 11/24/2022] Open
Abstract
Cellular antiviral programs encode molecules capable of targeting multiple steps in the virus lifecycle. Zinc-finger antiviral protein (ZAP) is a central and general regulator of antiviral activity that targets pathogen mRNA stability and translation. ZAP is diffusely cytoplasmic, but upon infection ZAP is targeted to particular cytoplasmic structures, termed stress granules (SGs). However, it remains unclear if ZAP’s antiviral activity correlates with SG localization, and what molecular cues are required to induce this localization event. Here, we use Sindbis virus (SINV) as a model infection and find that ZAP’s localization to SGs can be transient. Sometimes no apparent viral infection follows ZAP SG localization but ZAP SG localization always precedes accumulation of SINV non-structural protein, suggesting virus replication processes trigger SG formation and ZAP recruitment. Data from single-molecule RNA FISH corroborates this finding as the majority of cells with ZAP localization in SGs contain low levels of viral RNA. Furthermore, ZAP recruitment to SGs occurred in ZAP-expressing cells when co-cultured with cells replicating full-length SINV, but not when co-cultured with cells replicating a SINV replicon. ZAP recruitment to SGs is functionally important as a panel of alanine ZAP mutants indicate that the anti-SINV activity is correlated with ZAP’s ability to localize to SGs. As ZAP is a central component of the cellular antiviral programs, these data provide further evidence that SGs are an important cytoplasmic antiviral hub. These findings provide insight into how antiviral components are regulated upon virus infection to inhibit virus spread. Organisms encode immune programs, present in most somatic cells, to combat pathogens. The components of these antiviral programs are both constitutively expressed and highly upregulated upon pathogen recognition. Interestingly, a broadly acting antiviral factor is the zinc-finger antiviral protein (ZAP). ZAP is a primarily cytoplasmic protein that upon various cellular stresses, such as virus infection, can localize to specific cytoplasmic complexes termed stress granules (SGs). SGs are hubs that regulate mRNA stability and translation. Here, we show that SG localization is (i) correlated with ZAP’s antiviral function, (ii) most likely triggered during the early stages of virus replication, and (iii) a highly dynamic and transient process. Collectively, our data highlight the genetic and dynamic components of ZAP-mediated antiviral activity.
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Affiliation(s)
- Lok Man John Law
- The Laboratory of Virology and Infectious Disease, The Rockefeller University, New York, NY, United States of America
| | - Brandon S. Razooky
- The Laboratory of Virology and Infectious Disease, The Rockefeller University, New York, NY, United States of America
| | - Melody M. H. Li
- The Laboratory of Virology and Infectious Disease, The Rockefeller University, New York, NY, United States of America
| | - Shihyun You
- The Laboratory of Virology and Infectious Disease, The Rockefeller University, New York, NY, United States of America
| | - Andrea Jurado
- The Laboratory of Virology and Infectious Disease, The Rockefeller University, New York, NY, United States of America
| | - Charles M. Rice
- The Laboratory of Virology and Infectious Disease, The Rockefeller University, New York, NY, United States of America
| | - Margaret R. MacDonald
- The Laboratory of Virology and Infectious Disease, The Rockefeller University, New York, NY, United States of America
- * E-mail:
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20
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Yeap WC, Namasivayam P, Ooi TEK, Appleton DR, Kulaveerasingam H, Ho CL. EgRBP42 from oil palm enhances adaptation to stress in Arabidopsis through regulation of nucleocytoplasmic transport of stress-responsive mRNAs. Plant Cell Environ 2019; 42:1657-1673. [PMID: 30549047 DOI: 10.1111/pce.13503] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Accepted: 12/11/2018] [Indexed: 06/09/2023]
Abstract
Abiotic stress reduces plant growth and crop productivity. However, the mechanism underlying posttranscriptional regulations of stress response remains elusive. Herein, we report the posttranscriptional mechanism of nucleocytoplasmic RNA transport of stress-responsive transcripts mediated by EgRBP42, a heterogeneous nuclear ribonucleoprotein-like RNA-binding protein from oil palm, which could be necessary for rapid protein translation to confer abiotic stress tolerance in plants. Transgenic Arabidopsis overexpressing EgRBP42 showed early flowering through alteration of gene expression of flowering regulators and exhibited tolerance towards heat, cold, drought, flood, and salinity stresses with enhanced poststress recovery response by increasing the expression of its target stress-responsive genes. EgRBP42 harbours nucleocytoplasmic shuttling activity mediated by the nuclear localization signal and the M9-like domain of EgRBP42 and interacts directly with regulators in the nucleus, membrane, and the cytoplasm. EgRBP42 regulates the nucleocytoplasmic RNA transport of target stress-responsive transcripts through direct binding to their AG-rich motifs. Additionally, EgRBP42 transcript and protein induction by environmental stimuli are regulated at the transcriptional and posttranscriptional levels. Taken together, the posttranscriptional regulation of RNA transport mediated by EgRBP42 may change the stress-responsive protein profiles under abiotic stress conditions leading to a better adaptation of plants to environmental changes.
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Affiliation(s)
- Wan-Chin Yeap
- Sime Darby Plantation Berhad, Research and Development, Biotechnology and Breeding, Sime Darby Technology Centre Sdn. Bhd., Serdang, Malaysia
| | - Parameswari Namasivayam
- Department of Cell and Molecular Biology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, Serdang, Malaysia
| | - Tony Eng Keong Ooi
- Sime Darby Plantation Berhad, Research and Development, Biotechnology and Breeding, Sime Darby Technology Centre Sdn. Bhd., Serdang, Malaysia
| | - David Ross Appleton
- Sime Darby Plantation Berhad, Research and Development, Biotechnology and Breeding, Sime Darby Technology Centre Sdn. Bhd., Serdang, Malaysia
| | - Harikrishna Kulaveerasingam
- Sime Darby Plantation Berhad, Research and Development, Sime Darby Research Sdn Bhd, R&D Centre-Upstream, Kuala Langat, Malaysia
| | - Chai-Ling Ho
- Department of Cell and Molecular Biology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, Serdang, Malaysia
- Institute of Plantation Studies, Universiti Putra Malaysia, Serdang, Malaysia
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21
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McGinn JT, Aziz M, Zhang F, Yang WL, Nicastro JM, Coppa GF, Wang P. Cold-inducible RNA-binding protein-derived peptide C23 attenuates inflammation and tissue injury in a murine model of intestinal ischemia-reperfusion. Surgery 2018; 164:1191-1197. [PMID: 30154017 PMCID: PMC6261788 DOI: 10.1016/j.surg.2018.06.048] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Revised: 06/05/2018] [Accepted: 06/22/2018] [Indexed: 02/07/2023]
Abstract
BACKGROUND Cold-inducible RNA-binding protein is a novel damage-associated molecular pattern that causes inflammation. C23, a short peptide derived from cold-inducible RNA-binding protein, has been found to have efficacy in blocking cold-inducible RNA-binding protein's activity. We hypothesized that C23 reduces inflammation and tissue injury induced by intestinal ischemia-reperfusion. METHODS Male C57BL/6 mice were subjected to 60 minutes of intestinal ischemia by clamping the superior mesenteric artery. Immediately after reperfusion, either normal saline (vehicle) or C23 peptide (8 mg/kg body weight) was injected intraperitoneally. Four hours after reperfusion, blood, intestinal, and lung tissues were collected for analysis of inflammatory and tissue injury parameters. RESULTS Cold-inducible RNA-binding protein levels in the intestinal tissues were significantly increased following intestinal ischemia-reperfusion. Histologic examination of the intestine revealed a significant reduction in injury score in the C23 group by 48% as compared with the vehicles after intestinal ischemia-reperfusion. The serum levels of lactate dehydrogenase and aspartate aminotransferase were increased in animals that underwent vehicle-treated intestinal ischemia-reperfusion, whereas C23-treated animals exhibited significant reductions by 48% and 53%, respectively. The serum and intestinal tissue levels of tumor necrosis factor α were elevated in vehicle-treated intestinal ischemia-reperfusion mice but decreased by 72% and 69%, respectively, in C23-treated mice. Interleukin-6 mRNA levels in the lungs were reduced by 86% in the C23-treated group in comparison to the vehicle-treated group after intestinal ischemia-reperfusion. Expression of macrophage inflammatory protein 2 and level of myeloperoxidase activity in the lungs were dramatically increased after intestinal ischemia-reperfusion and significantly reduced by 91% and 25%, respectively, in the C23-treated group. CONCLUSION C23 has potential to be developed into a possible therapy for reperfusion injury after mesenteric ischemia and reperfusion.
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Affiliation(s)
- Joseph T McGinn
- Department of Surgery and Molecular Medicine, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Manhasset, New York
| | - Monowar Aziz
- Center for Immunology and Inflammation, The Feinstein Institute for Medical Research, Manhasset, New York
| | - Fangming Zhang
- Center for Immunology and Inflammation, The Feinstein Institute for Medical Research, Manhasset, New York
| | - Weng-Lang Yang
- Department of Surgery and Molecular Medicine, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Manhasset, New York; Center for Immunology and Inflammation, The Feinstein Institute for Medical Research, Manhasset, New York
| | - Jeffrey M Nicastro
- Department of Surgery and Molecular Medicine, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Manhasset, New York
| | - Gene F Coppa
- Department of Surgery and Molecular Medicine, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Manhasset, New York
| | - Ping Wang
- Department of Surgery and Molecular Medicine, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Manhasset, New York; Center for Immunology and Inflammation, The Feinstein Institute for Medical Research, Manhasset, New York.
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Vandghanooni S, Eskandani M, Barar J, Omidi Y. AS1411 aptamer-decorated cisplatin-loaded poly(lactic-co-glycolic acid) nanoparticles for targeted therapy of miR-21-inhibited ovarian cancer cells. Nanomedicine (Lond) 2018; 13:2729-2758. [PMID: 30394201 DOI: 10.2217/nnm-2018-0205] [Citation(s) in RCA: 74] [Impact Index Per Article: 12.3] [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] [Indexed: 12/31/2022] Open
Abstract
AIM The overexpression of miRNA-21 correlates with the cisplatin (CIS) resistance in the ovarian cancers. METHODS AS1411 antinucleolin aptamer-decorated PEGylated poly(lactic-co-glycolic acid) nanoparticles containing CIS (Ap-CIS-NPs) and anti-miR-21 (Ap-anti-miR-21-NPs) were prepared, physicochemically investigated and their cancer-targeting ability was confirmed. CIS-resistant A2780 cells (A2780 R) were infected with anti-miR-21 using Ap-anti-miR-21-NPs to decrease the drug resistance and sensitize the cells to CIS. Afterward, miR-21-inhibited cells were exposed to the Ap-CIS-NPs. RESULTS Ap-anti-miR-21-NPs could infect the A2780 R cells mainly through nucleolin-mediated endocytosis and inhibit the endogenous miR-21. Targeted delivery of CIS using Ap-CIS-NPs into the miR-21-inhibited cells caused an enhanced mortality. CONCLUSION The targeted delivery of chemotherapeutics to the oncomiR-inhibited cells may find a robust application in cancer chemo/gene therapy.
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Affiliation(s)
- Somayeh Vandghanooni
- Research Center for Pharmaceutical Nanotechnology, Biomedicine Institute, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Morteza Eskandani
- Research Center for Pharmaceutical Nanotechnology, Biomedicine Institute, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Jaleh Barar
- Research Center for Pharmaceutical Nanotechnology, Biomedicine Institute, Tabriz University of Medical Sciences, Tabriz, Iran
- Department of Pharmaceutics, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Yadollah Omidi
- Research Center for Pharmaceutical Nanotechnology, Biomedicine Institute, Tabriz University of Medical Sciences, Tabriz, Iran
- Department of Pharmaceutics, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
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23
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Dhez AC, Benedetti E, Antonosante A, Panella G, Ranieri B, Florio TM, Cristiano L, Angelucci F, Giansanti F, Di Leandro L, d'Angelo M, Melone M, De Cola A, Federici L, Galzio R, Cascone I, Raineri F, Cimini A, Courty J, Giordano A, Ippoliti R. Targeted therapy of human glioblastoma via delivery of a toxin through a peptide directed to cell surface nucleolin. J Cell Physiol 2018; 233:4091-4105. [PMID: 28941284 DOI: 10.1002/jcp.26205] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [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: 05/15/2017] [Accepted: 09/20/2017] [Indexed: 11/06/2022]
Abstract
Targeted anticancer therapies demand discovery of new cellular targets to be exploited for the delivery of toxic molecules and drugs. In this perspective, in the last few years, nucleolin has been identified as an interesting surface marker to be used for the therapy of glioblastoma. In this study, we investigated whether a synthetic antagonist of cell-surface nucleolin known as N6L, previously reported to decrease both tumor growth and tumor angiogenesis in several cancer cell lines, including glioblastoma cells, as well as endothelial cells proliferation, could be exploited to deliver a protein toxin (saporin) to glioblastoma cells. The pseudopeptide N6L cross-linked to saporin-S6 induced internalization of the toxin inside glioblastoma cancer cells. Our results in vitro demonstrated the effectiveness of this conjugate in inducing cell death, with an ID50 four orders of magnitude lower than that observed for free N6L. Furthermore, the preliminary in vivo study demonstrated efficiency in reducing the tumor mass in an orthotopic mouse model of glioblastoma.
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Affiliation(s)
- Anne-Chloé Dhez
- Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
- Université Paris-Est, UPEC, Créteil, France
- CNRS, ERL 9215, Laboratoire de Recherche sur la Croissance Cellulaire, la Réparation et la Régénération Tissulaires (CRRET), Créteil, France
| | - Elisabetta Benedetti
- Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
| | - Andrea Antonosante
- Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
| | - Gloria Panella
- Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
| | - Brigida Ranieri
- Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
| | - Tiziana M Florio
- Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
| | - Loredana Cristiano
- Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
| | - Francesco Angelucci
- Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
| | - Francesco Giansanti
- Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
| | - Luana Di Leandro
- Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
| | - Michele d'Angelo
- Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
| | - Marina Melone
- Department of Biology, Sbarro Institute for Cancer Research and Molecular Medicine, Temple University, Philadelphia, Pennsylvania
- Department of Medical, Surgical, Neurological, Metabolic Sciences and Aging, 2nd Division of Neurology, Center for Rare Diseases and InterUniversity Center for Research in Neurosciences, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - Antonella De Cola
- Department of Experimental and Clinical Sciences, University of Chieti 'G. D'Annunzio', Chieti, Italy
| | - Luca Federici
- Department of Experimental and Clinical Sciences, University of Chieti 'G. D'Annunzio', Chieti, Italy
| | - Renato Galzio
- Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
| | - Ilaria Cascone
- Université Paris-Est, UPEC, Créteil, France
- CNRS, ERL 9215, Laboratoire de Recherche sur la Croissance Cellulaire, la Réparation et la Régénération Tissulaires (CRRET), Créteil, France
| | - Fabio Raineri
- Université Paris-Est, UPEC, Créteil, France
- CNRS, ERL 9215, Laboratoire de Recherche sur la Croissance Cellulaire, la Réparation et la Régénération Tissulaires (CRRET), Créteil, France
| | - Annamaria Cimini
- Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
- Department of Biology, Sbarro Institute for Cancer Research and Molecular Medicine, Temple University, Philadelphia, Pennsylvania
- National Institute for Nuclear Physics (INFN), Gran Sasso National Laboratory (LNGS), Assergi, Italy
| | - José Courty
- Université Paris-Est, UPEC, Créteil, France
- CNRS, ERL 9215, Laboratoire de Recherche sur la Croissance Cellulaire, la Réparation et la Régénération Tissulaires (CRRET), Créteil, France
| | - Antonio Giordano
- Department of Biology, Sbarro Institute for Cancer Research and Molecular Medicine, Temple University, Philadelphia, Pennsylvania
- Department of Medicine, Surgery and Neuroscience, University of Siena, Siena, Italy
| | - Rodolfo Ippoliti
- Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
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24
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Li F, Lu J, Liu J, Liang C, Wang M, Wang L, Li D, Yao H, Zhang Q, Wen J, Zhang ZK, Li J, Lv Q, He X, Guo B, Guan D, Yu Y, Dang L, Wu X, Li Y, Chen G, Jiang F, Sun S, Zhang BT, Lu A, Zhang G. A water-soluble nucleolin aptamer-paclitaxel conjugate for tumor-specific targeting in ovarian cancer. Nat Commun 2017; 8:1390. [PMID: 29123088 PMCID: PMC5680242 DOI: 10.1038/s41467-017-01565-6] [Citation(s) in RCA: 153] [Impact Index Per Article: 21.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Accepted: 09/27/2017] [Indexed: 12/05/2022] Open
Abstract
Paclitaxel (PTX) is among the most commonly used first-line drugs for cancer chemotherapy. However, its poor water solubility and indiscriminate distribution in normal tissues remain clinical challenges. Here we design and synthesize a highly water-soluble nucleolin aptamer-paclitaxel conjugate (NucA-PTX) that selectively delivers PTX to the tumor site. By connecting a tumor-targeting nucleolin aptamer (NucA) to the active hydroxyl group at 2' position of PTX via a cathepsin B sensitive dipeptide bond, NucA-PTX remains stable and inactive in the circulation. NucA facilitates the uptake of the conjugated PTX specifically in tumor cells. Once inside cells, the dipeptide bond linker of NucA-PTX is cleaved by cathepsin B and then the conjugated PTX is released for action. The NucA modification assists the selective accumulation of the conjugated PTX in ovarian tumor tissue rather than normal tissues, and subsequently resulting in notably improved antitumor activity and reduced toxicity.
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Affiliation(s)
- Fangfei Li
- Institute of Precision Medicine and Innovative Drug Discovery (PMID), School of Chinese Medicine, Hong Kong Baptist University, Hong Kong SAR, 999077, China
| | - Jun Lu
- Institute of Precision Medicine and Innovative Drug Discovery (PMID), School of Chinese Medicine, Hong Kong Baptist University, Hong Kong SAR, 999077, China
| | - Jin Liu
- Institute for Advancing Translational Medicine in Bone and Joint Diseases (TMBJ), School of Chinese Medicine, Hong Kong Baptist University, Hong Kong SAR, 999077, China
| | - Chao Liang
- Institute of Precision Medicine and Innovative Drug Discovery (PMID), School of Chinese Medicine, Hong Kong Baptist University, Hong Kong SAR, 999077, China
- Institute for Advancing Translational Medicine in Bone and Joint Diseases (TMBJ), School of Chinese Medicine, Hong Kong Baptist University, Hong Kong SAR, 999077, China
| | - Maolin Wang
- Institute of Integrated Bioinfomedicine and Translational Science (IBTS), School of Chinese Medicine, Hong Kong Baptist University, Hong Kong SAR, 999077, China
| | - Luyao Wang
- Institute of Precision Medicine and Innovative Drug Discovery (PMID), School of Chinese Medicine, Hong Kong Baptist University, Hong Kong SAR, 999077, China
- Institute for Advancing Translational Medicine in Bone and Joint Diseases (TMBJ), School of Chinese Medicine, Hong Kong Baptist University, Hong Kong SAR, 999077, China
| | - Defang Li
- Institute for Advancing Translational Medicine in Bone and Joint Diseases (TMBJ), School of Chinese Medicine, Hong Kong Baptist University, Hong Kong SAR, 999077, China
| | - Houzong Yao
- Institute of Precision Medicine and Innovative Drug Discovery (PMID), School of Chinese Medicine, Hong Kong Baptist University, Hong Kong SAR, 999077, China
| | - Qiulong Zhang
- Institute of Precision Medicine and Innovative Drug Discovery (PMID), School of Chinese Medicine, Hong Kong Baptist University, Hong Kong SAR, 999077, China
| | - Jia Wen
- College of Science, Northwest Agriculture and Forestry University, Yangling, 712100, Shaanxi, P.R. China
| | - Zong-Kang Zhang
- School of Chinese Medicine, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, 999077, China
| | - Jie Li
- School of Chinese Medicine, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, 999077, China
| | - Quanxia Lv
- Institute of Precision Medicine and Innovative Drug Discovery (PMID), School of Chinese Medicine, Hong Kong Baptist University, Hong Kong SAR, 999077, China
| | - Xiaojuan He
- Institute for Advancing Translational Medicine in Bone and Joint Diseases (TMBJ), School of Chinese Medicine, Hong Kong Baptist University, Hong Kong SAR, 999077, China
| | - Baosheng Guo
- Institute for Advancing Translational Medicine in Bone and Joint Diseases (TMBJ), School of Chinese Medicine, Hong Kong Baptist University, Hong Kong SAR, 999077, China
| | - Daogang Guan
- Institute of Integrated Bioinfomedicine and Translational Science (IBTS), School of Chinese Medicine, Hong Kong Baptist University, Hong Kong SAR, 999077, China
| | - Yuanyuan Yu
- Institute for Advancing Translational Medicine in Bone and Joint Diseases (TMBJ), School of Chinese Medicine, Hong Kong Baptist University, Hong Kong SAR, 999077, China
| | - Lei Dang
- Institute of Precision Medicine and Innovative Drug Discovery (PMID), School of Chinese Medicine, Hong Kong Baptist University, Hong Kong SAR, 999077, China
| | - Xiaohao Wu
- Institute for Advancing Translational Medicine in Bone and Joint Diseases (TMBJ), School of Chinese Medicine, Hong Kong Baptist University, Hong Kong SAR, 999077, China
| | - Yongshu Li
- Institute for Advancing Translational Medicine in Bone and Joint Diseases (TMBJ), School of Chinese Medicine, Hong Kong Baptist University, Hong Kong SAR, 999077, China
| | - Guofen Chen
- Department of Orthopaedics and Traumatology, Nanfang Hospital, Guangzhou, 510515, China
| | - Feng Jiang
- Institute of Precision Medicine and Innovative Drug Discovery (PMID), School of Chinese Medicine, Hong Kong Baptist University, Hong Kong SAR, 999077, China
| | - Shiguo Sun
- College of Science, Northwest Agriculture and Forestry University, Yangling, 712100, Shaanxi, P.R. China
| | - Bao-Ting Zhang
- School of Chinese Medicine, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, 999077, China.
| | - Aiping Lu
- Institute of Precision Medicine and Innovative Drug Discovery (PMID), School of Chinese Medicine, Hong Kong Baptist University, Hong Kong SAR, 999077, China.
- Institute for Advancing Translational Medicine in Bone and Joint Diseases (TMBJ), School of Chinese Medicine, Hong Kong Baptist University, Hong Kong SAR, 999077, China.
- Institute of Integrated Bioinfomedicine and Translational Science (IBTS), School of Chinese Medicine, Hong Kong Baptist University, Hong Kong SAR, 999077, China.
| | - Ge Zhang
- Institute of Precision Medicine and Innovative Drug Discovery (PMID), School of Chinese Medicine, Hong Kong Baptist University, Hong Kong SAR, 999077, China.
- Institute for Advancing Translational Medicine in Bone and Joint Diseases (TMBJ), School of Chinese Medicine, Hong Kong Baptist University, Hong Kong SAR, 999077, China.
- Institute of Integrated Bioinfomedicine and Translational Science (IBTS), School of Chinese Medicine, Hong Kong Baptist University, Hong Kong SAR, 999077, China.
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25
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Hwang YS, Ahn SY, Moon S, Zheng Z, Cha IH, Kim J, Zhang X. Insulin-like growth factor-II mRNA binding protein-3 and podoplanin expression are associated with bone invasion and prognosis in oral squamous cell carcinoma. Arch Oral Biol 2016; 69:25-32. [PMID: 27232357 DOI: 10.1016/j.archoralbio.2016.05.008] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [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: 05/21/2015] [Revised: 03/30/2016] [Accepted: 05/08/2016] [Indexed: 11/19/2022]
Abstract
OBJECTIVE This study aimed to evaluate the prognostic implications of insulin-like growth factor-II mRNA binding protein-3 (IMP3) and podoplanin (PDPN) as therapeutic targets against oral squamous cell carcinoma (OSCC) with bone invasion. STUDY DESIGN We elucidated the correlation of IMP3 and PDPN expression with bone invasion in 160 OSCC tissue specimens, and assessed a mouse calvarium xenograft model using an IMP3- and PDPN-depleted OSCC cell line. RESULTS The retrospective analysis revealed that the expression of IMP3 and PDPN is significantly correlated with T stage, lymph node metastasis, and the overall survival of OSCC patients. In addition, the dual expression of IMP3 and PDPN but not the single expression of either IMP3 or PDPN was associated with bone invasion and the number of osteoclasts in patients with OSCC. In support of these findings, IMP3 or PDPN depletion inhibited the invasive capacity of OSCC cells in a three-dimensional culture system, tumorigenesis, and regional bone destruction in a xenograft mouse model. In addition, IMP3 or PDPN depletion inhibited the expression of interleukin (IL)-6 and IL-8 in OSCC cells, and decreased the expression of receptor activator of NF-κB ligand (RANKL) in xenograft tumor tissues of OSCC. CONCLUSIONS These results suggest that IMP3 and PDPN may have strong influence on the pathogenesis of OSCC, especially in bone invasion, and may serve as novel therapeutic targets with prognostic implications for bone-invasive OSCC.
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Affiliation(s)
- Young Sun Hwang
- Department of Dental Hygiene, College of Health Science, Eulji University, Seoul, Korea
| | - Sung Yong Ahn
- Department of Oral Pathology, Graduate School, Yonsei University College of Dentistry, Seoul, Korea; Oral Cancer Research Institute, Yonsei University College of Dentistry, Seoul, Korea
| | - Sook Moon
- Department of Oral Pathology, Graduate School, Yonsei University College of Dentistry, Seoul, Korea
| | - Zhenlong Zheng
- Department of Dermatology, Yanbian University Hospital, Yanji City, Jilin province, China
| | - In-Ho Cha
- Oral Cancer Research Institute, Yonsei University College of Dentistry, Seoul, Korea
| | - Jin Kim
- Department of Oral Pathology, Graduate School, Yonsei University College of Dentistry, Seoul, Korea; Oral Cancer Research Institute, Yonsei University College of Dentistry, Seoul, Korea
| | - Xianglan Zhang
- Department of Pathology, Yanbian University Hospital, Yanji City, Jilin province, China; Oral Cancer Research Institute, Yonsei University College of Dentistry, Seoul, Korea.
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26
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Jiang B, Li Y, Liang P, Liu Y, Huang X, Tong Z, Zhang P, Huang X, Liu Y, Liu Z. Nucleolin enhances the proliferation and migration of heat-denatured human dermal fibroblasts. Wound Repair Regen 2015; 23:807-18. [PMID: 26148015 DOI: 10.1111/wrr.12339] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2015] [Accepted: 06/15/2015] [Indexed: 01/24/2023]
Abstract
Denatured dermis, a part of dermis in burned skin, has the ability to restore its normal morphology and functions after their surrounding microenvironment is improved. However, the cellular and molecular mechanisms by which the denatured dermis could improve wound healing are still unclear. This study aimed to investigate the role of nucleolin during the recovery of heat-denatured human dermal fibroblasts. Nucleolin mRNA and protein expression were significantly increased time-dependently during the recovery of heat-denatured human dermal fibroblasts (52 °C, 30 seconds). Heat-denaturation promoted a time-dependent cell proliferation, migration, chemotaxis, and scratched wound healing during the recovery of human dermal fibroblasts. These effects were prevented by knockdown of nucleolin expression with small interference RNA (siRNA), whereas overexpression of nucleolin enhanced cell proliferation, migration, and chemotaxis of human dermal fibroblasts with heat-denaturation. In addition, the expression of transforming growth factor-beta 1(TGF-β1) was significantly increased during the recovery of heat-denatured dermis and human dermal fibroblasts. TGF-β1 expression was up-regulated by nucleolin in human dermal fibroblasts. The results suggest that nucleolin expression is up-regulated, and play an important role in promoting cell proliferation, migration, and chemotaxis of human dermal fibroblasts during the recovery of heat-denatured dermis with a mechanism probably related to TGF-β1.
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Affiliation(s)
- Bimei Jiang
- Department of Pathophysiology, Xiangya School of Medicine, Central South University, Changsha, Hunan, 410008, People's Republic of China
| | - Yuanbin Li
- Department of Pathophysiology, Xiangya School of Medicine, Central South University, Changsha, Hunan, 410008, People's Republic of China
| | - Pengfei Liang
- Department of Burns and Plastic Surgery, Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China
| | - Yanjuan Liu
- Department of Pathophysiology, Xiangya School of Medicine, Central South University, Changsha, Hunan, 410008, People's Republic of China
| | - Xu Huang
- Department of Burns and Plastic Surgery, Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China
| | - Zhongyi Tong
- Department of Pathophysiology, Xiangya School of Medicine, Central South University, Changsha, Hunan, 410008, People's Republic of China
| | - Pihong Zhang
- Department of Burns and Plastic Surgery, Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China
| | - Xiaoyuan Huang
- Department of Burns and Plastic Surgery, Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China
| | - Ying Liu
- Dorothy M. Davis Heart and Lung Research Institute, Division of Cardiovascular Medicine, Department of Internal Medicine, The Ohio State University Wexner Medical Center, Columbus, OH, USA
| | - Zhenguo Liu
- Dorothy M. Davis Heart and Lung Research Institute, Division of Cardiovascular Medicine, Department of Internal Medicine, The Ohio State University Wexner Medical Center, Columbus, OH, USA
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27
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Neupert B, Müllner E, Rothenberger S, Seiser C, Teixeira S, Thompson NA, Emery-Goodman A, Kühn LC. Expression of human transferrin receptor. Curr Stud Hematol Blood Transfus 2015:109-14. [PMID: 1954758 DOI: 10.1159/000419348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- B Neupert
- Swiss Institute for Experimental Cancer Research, Epalinges s/Lausanne
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28
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Dorofeyeva NA, Kotsuruba AV, Mogilnitskaya LA, Malyna AE, Kornelyuk AI, Sagach VF. [ENDOTHELIAL MONOCYTEACTIVATING FACTOR II CANCELS OXIDATIVE STRESS, CONSTITUTIVE NOS UNCOUPLING AND INDUCED VIOLATIONS OF CARDIAC HEMODYNAMICS IN HYPERTENSION (PART II)]. Fiziol Zh (1994) 2015; 61:11-18. [PMID: 26495731 DOI: 10.15407/fz61.03.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The purpose of this study was to investigate the effect of EMAP II on free radical state of the heart and blood vessels, to restore cNOS coupling and cardiac hemodynamics in spontaneously hypertensive rats. It was found that, due to the combined inhibition of oxidative and nitrosative stress, EMAP I quickly restores impaired in hypertension constitutive de novo synthesis of NO by restoring cNOS coupling. Restoration by EMAP II of constitutive de novo synthesis NO abolished cardiac and endothelial dysfunction in spontaneously hypertensive rats. In hypertension, the introduction of EMAP II helped to improve the performance of the pumping function of the heart (stroke volume increased by 18.2 %, cardiac output -22 %), an arterial stiffness decreased by 23.2 %, process of relaxation of the left ventricle improved, due to decreased in 4,7 times myocardial end-diastolic stiffness.
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29
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Bhuiyan MIH, Lee JH, Kim SY, Cho KO. Expression of exogenous LIN28 contributes to proliferation and survival of mouse primary cortical neurons in vitro. Neuroscience 2013; 248:448-58. [PMID: 23806711 DOI: 10.1016/j.neuroscience.2013.06.023] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [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: 12/19/2012] [Revised: 06/13/2013] [Accepted: 06/14/2013] [Indexed: 01/29/2023]
Abstract
LIN28, an RNA-binding protein, is known to be involved in the regulation of many cellular processes, such as embryonic stem cell proliferation, cell fate succession, developmental timing, and oncogenesis. In this study, we investigated the effect of constitutively expressing exogenous LIN28 on neuronal cell proliferation and viability in vitro. Plasmids containing LIN28-green fluorescent protein (GFP) or GFP were introduced into the embryonic mouse brains at E14.5 by in utero electroporation. Two days after electroporation, embryonic cortices were harvested and cultured. It was found that transfected cells stably overexpressed LIN28 in vitro. Viability curve from live cell imaging showed that the number of GFP-expressing cells decreased over time in line with naive primary cortical neurons. In contrast, the number of LIN28-GFP-overexpressing neurons initially increased and remained high at later time-points in culture than GFP-expressing cells. Double immunofluorescence showed that at an early time in culture, the number of Ki-67/GFP double-positive cells was higher in the LIN28-GFP group than that of controls. Moreover, there were significantly lower numbers of condensed nuclei/GFP- and cleaved caspase-3/GFP-positive cells in the LIN28-GFP groups compared to control GFP. Furthermore, it was confirmed that the LIN28-GFP-expressing cells at days in vitro (DIV)13 were neuronal nuclei (NeuN)-positive mature neurons. Finally, the expression of insulin-like growth factor 2 (IGF-2) was induced in LIN28-expressing primary cortical neurons, which was not detected in controls. Taken together, our results indicate that the expression of exogenous LIN28 can promote the proliferation of neural progenitor cells and exert prosurvival effect on primary cortical neurons by inhibiting caspase-dependent apoptosis, possibly via upregulation of IGF-2.
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Affiliation(s)
- M I H Bhuiyan
- Department of Pharmacology, Cell Death Disease Research Center, College of Medicine, The Catholic University of Korea, 505 Banpo-dong, Socho-gu, Seoul 137-701, South Korea
| | - J-H Lee
- Department of Biochemistry, College of Medicine, The Catholic University of Korea, 505 Banpo-dong, Socho-gu, Seoul 137-701, South Korea
| | - S Y Kim
- Department of Pharmacology, Cell Death Disease Research Center, College of Medicine, The Catholic University of Korea, 505 Banpo-dong, Socho-gu, Seoul 137-701, South Korea
| | - K-O Cho
- Department of Pharmacology, Cell Death Disease Research Center, College of Medicine, The Catholic University of Korea, 505 Banpo-dong, Socho-gu, Seoul 137-701, South Korea.
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30
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Green LA, Petrusca D, Rajashekhar G, Gianaris T, Schweitzer KS, Wang L, Justice MJ, Petrache I, Clauss M. Cigarette smoke-induced CXCR3 receptor up-regulation mediates endothelial apoptosis. Am J Respir Cell Mol Biol 2012; 47:807-14. [PMID: 22936405 PMCID: PMC3547093 DOI: 10.1165/rcmb.2012-0132oc] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2012] [Accepted: 07/30/2012] [Indexed: 11/24/2022] Open
Abstract
Endothelial monocyte-activating polypeptide II (EMAP II) and interferon-inducible protein (IP)-10 are proinflammatory mediators, which in addition to their chemokine activities, selectively induce apoptosis in endothelial cells and are up-regulated in the lungs of cigarette smoke-exposed humans. Previously, we showed that EMAP II is an essential mediator of cigarette smoke-induced lung emphysema in mice linking endothelial cell apoptosis with inflammation. Here we addressed the role of the CXCR3 receptor in EMAP II-induced and IP-10-induced apoptosis in endothelial cells and its regulation by cigarette smoke. We found that both neutralizing antibodies and small inhibitory RNA to CXCR3 abrogated EMAP II-induced and IP-10-induced endothelial caspase-3 activation and DNA fragmentation. CXCR3 receptor surface expression in human lung microvascular endothelial cells and in lung tissue endothelium was up-regulated by exposure to cigarette smoke. In tissue culture conditions, EMAP II-induced and IP-10-induced apoptosis was enhanced by preincubation with cigarette smoke extract. Interestingly, serum starvation also induced CXCR3 up-regulation and enhanced EMAP II-induced endothelial apoptosis. Signal transduction via p38 mitogen-activated protein kinase activation was essential for CXCR3-induced cell death, but not for CXCR3 receptor up-regulation by cigarette smoke. In turn, protein nitration was required for CXCR3 receptor up-regulation by cigarette smoke and consequently for subsequent CXCR3-induced cell death. In conclusion, the concerted up-regulation of proinflammatory EMAP II, IP-10, and CXCR3 by cigarette smoke could sustain a cascade of cell death that may promote the alveolar tissue loss noted in human emphysema.
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Affiliation(s)
- Linden A. Green
- Department of Cellular and Integrative Physiology, Indiana University School of Medicine
- R.L. Roudebush Veterans Affairs Medical Center, Indianapolis, Indiana
| | - Daniela Petrusca
- Department of Pulmonary and Critical Care Medicine, Indiana University School of Medicine, and
| | - Gangaraju Rajashekhar
- Department of Cellular and Integrative Physiology, Indiana University School of Medicine
| | - Tom Gianaris
- Indiana University School of Medicine, Indianapolis, Indiana; and
| | - Kelly S. Schweitzer
- Department of Pulmonary and Critical Care Medicine, Indiana University School of Medicine, and
| | - Liang Wang
- R.L. Roudebush Veterans Affairs Medical Center, Indianapolis, Indiana
| | - Matthew J. Justice
- Department of Pulmonary and Critical Care Medicine, Indiana University School of Medicine, and
- Indiana University School of Medicine, Indianapolis, Indiana; and
| | - Irina Petrache
- Department of Pulmonary and Critical Care Medicine, Indiana University School of Medicine, and
- R.L. Roudebush Veterans Affairs Medical Center, Indianapolis, Indiana
| | - Matthias Clauss
- Department of Cellular and Integrative Physiology, Indiana University School of Medicine
- R.L. Roudebush Veterans Affairs Medical Center, Indianapolis, Indiana
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Heptinstall S. Platelet activation by an extracellular adherence protein from Staphylococcus aureus acting via modulation of sulfhydryl groups on platelets. Arterioscler Thromb Vasc Biol 2012; 32:1751-2. [PMID: 22815338 DOI: 10.1161/atvbaha.112.252460] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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32
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Lylo VV, Matsevich LL, Kotsarenko EV, Babenko LA, Korneliuk AI, Sukhorada EM, Lukash LL. [Induction of repair enzyme O6-methylguanine-DNA methyltransferase gene expression under the influence of cytokine EMAP II in human cells in vitro]. Tsitol Genet 2011; 45:53-60. [PMID: 22329163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The aim of our study was to investigate the effect of recombinant human cytokine EMAP II (endothelial monocyte-activating polypeptide II) on the expression of MGMT gene, encoding repair enzyme O6-methylguanine-DNA methyltransferase (MGMT) in human cell cultures. The influence of EMAP II on cell proliferation was performed using routine MTT assay. Identification of MGMT in cell extracts was performed using Western blot analysis. We used cell lines: A102 (fibroblasts), CB-1 (umbilical cord blood stromal cells), 4BL6 (cells derived from peripheral blood). It was shown that cytokine EMAP II caused induction of MGMT expression in studied human cell lines. There was a decrease in cell number at high concentrations of this cytokine. It was found that the presence of cytokine EMAP II in serum-free growth medium leads to increasing of repair enzyme MGMT expression level in human cells in vitro.
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33
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Naknukool S, Hayakawa S, Ogawa M. Multiple biological functions of novel basic proteins isolated from duck egg white: duck basic protein small 1 (dBPS1) and 2 (dBPS2). J Agric Food Chem 2011; 59:5081-5086. [PMID: 21425855 DOI: 10.1021/jf2004404] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Biological functions of duck basic protein small 1 (dBPS(1)) and 2 (dBPS(2)) were investigated by in vitro experiments. Results of agarose gel retardation assay indicated that dBPS(1) and dBPS(2) associate with RNA. Addition of NaCl or urea induced partial dissociation of dBPS(1)/dBPS(2)-RNA complex, implying that electrostatic interaction, hydrophobic interaction, and hydrogen bonds are involved in the association of dBPS(1)/dBPS(2) to RNA. dBPS(1) and dBPS(2) inhibited pancreatic lipase activity with the fifty percent inhibitory concentration (IC(50)) of 250 and 100 μg/mL, respectively. Peptic hydrolysates of dBPS(1) and those of dBPS(2) showed a potent angiotensin I-converting enzyme (ACE) inhibition with an IC(50) of 22.5 and 49.6 mg/L. The most potent ACE-inhibitory peptide was a nanopeptide (EKKGFCAGY) from dBPS(1) and an octapeptide (KYCPKVGY) from dBPS(2). These multiple biological functions of dBPS(1) and dBPS(2) may contribute to reducing the risk of lifestyle diseases.
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Affiliation(s)
- Supaporn Naknukool
- Department of Applied Biological Science, Faculty of Agriculture, Kagawa University, Ikenobe, Miki, Kagawa, Japan
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34
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Reznikov OH, Chaĭkovs'ka LV, Poliakova LI, Sachyns'ka OV. [Effects of cytokine-like polypeptide EMAP II and flutamide on the testosterone-stimulated prostate of castrated rats]. Fiziol Zh (1994) 2011; 57:12-20. [PMID: 22164405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The effects of separate and combined administration of cytokine-like polypeptide EMAP II and flutamide, a nonsteroid antiandrogen, on morphology and function of the accessory sexual glands in castrated rats stimulated with testosterone propionate were studied. We found antiangiogenic, procoagulating and proapoptotic effects of EMAP II in the ventral prostate. Combined administration of the preparations enhanced their antiprostatic effects, which were manifested in inhibition of the androgen-dependent processes in prostate tissues, changes in proliferation and apoptosis, DNA, RNA and protein contents. We conclude that combined administration of EMAP II and flutamide can be used for development of new therapeutic modalities in prostate cancer.
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35
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Jiang B, Zhang B, Liang P, Song J, Deng H, Tu Z, Deng G, Xiao X. Nucleolin/C23 mediates the antiapoptotic effect of heat shock protein 70 during oxidative stress. FEBS J 2010; 277:642-52. [PMID: 20050922 DOI: 10.1111/j.1742-4658.2009.07510.x] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Although heat shock protein 70 (Hsp70) has been shown to markedly inhibit H(2)O(2)-induced apoptosis in C2C12 cells, and nucleolin/C23 has also been implicated in apoptosis, the relationship of these two molecules is still largely unknown. The aim of the current study was to investigate the potential involvement of nucleolin/C23 in the antiapoptotic mechanism of Hsp70. We found that primary cultures of neonatal rat cardiomyocytes underwent apoptosis upon H(2)O(2) treatment, and in these cells nucleolin/C23 protein was highly unstable and had a half-life of less than 4 h. However, transfection with Hsp70 greatly stabilized nucleolin/C23 and also protected the cells from H(2)O(2)-induced apoptosis. When nucleolin/C23 was knocked down with an antisense oligomer, H(2)O(2)-induced apoptosis became more severe, even in Hsp70-overexpressed cells, demonstrating an essential role of nucleolin/C23 in the antiapoptotic effects of Hsp70. Similar results were obtained by both nuclear morphology observation and caspase-3 activity assay. Therefore, these data provide evidence that nucleolin/C23 is an essential downstream effecter of Hsp70 in the protection of cardiomyocytes against oxidative stress-induced apoptosis.
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Affiliation(s)
- Bimei Jiang
- Department of Pathophysiology, Xiangya School of Medicine, Central South University, Changsha, Hunan, China
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Reznikov AG, Chaykovskaya LV, Polyakova LI, Kornelyuk AI. Antitumor effect of endothelial monocyte-activating polypeptide-II on human prostate adenocarcinoma in mouse xenograft model. Exp Oncol 2007; 29:267-271. [PMID: 18199981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
UNLABELLED Endothelial monocyte-activating polypeptide-II (EMAP-II) is a novel proinflammatory cytokine with anti-angiogenic properties. The aim of this work was to evaluate in vivo antitumor activity of EMAP-II in growing human prostate adenocarcinoma xenograft mouse model. MATERIALS AND METHODS Recombinant human EMAP-II was expressed in Escherichia coli and purified after cleavage with enterokinase (EMAP-II e). EMAP-II preparations were injected to CBA mice bearing subrenal capsule xenografts of human prostate adenocarcinoma. After 3-days treatment, the xenografts were isolated and weighed, then the transplants exposed to EMAP II e (100 or 200 microg/kg b. w.) were examined histologically. RESULTS EMAP-II administered daily at a dose of 100 or 200 microg/kg b. w. caused striking retardation of local tumor progression as compared to the controls. Low dose (10 microg/kg) was effective in some cases. CONCLUSION EMAP II exhibits significant antitumor activity in vivo in human prostate adenocarcinoma xenografts in mouse model.
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Affiliation(s)
- A G Reznikov
- VP Komisarenko Institute of Endocrinology and Metabolism, Academy of Medical Sciences of Ukraine, Kyiv, Ukraine.
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Faisal W, Symonds P, Panjwani S, Heng Y, Murray JC. Cell-surface associated p43/endothelial-monocyte-activating-polypeptide-II in hepatocellular carcinoma cells induces apoptosis in T-lymphocytes. Asian J Surg 2007; 30:13-22. [PMID: 17337366 DOI: 10.1016/s1015-9584(09)60122-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
OBJECTIVE The novel, proinflammatory cytokine endothelial-monocyte-activating-polypeptide-II (EMAP-II) was first found in tumour cell supernatants and is closely related or identical to the p43 component of the mammalian multisynthetase complex. In its secreted form, EMAP-II has multiple cytokine-like activities in vitro, including chemotactic, procoagulant and antiangiogenic properties. We recently showed that neoplastic but not normal hepatocytes expresses the 34-kDa molecule on the cell surface in vitro and the cell-surface expression is upregulated by treatment with tumour necrosis factor (TNF)-alpha/interferon (IFN)-gamma and/or hypoxia. We hypothesized an immune-regulatory role of EMAP-II within neoplastic tissues and investigated its effects on lymphocytes. METHODS To study the role of EMAP-II in tumour cell-induced lymphocyte killing, Jurkat T-cells were co-cultured with a range of hepatocellular carcinoma (HCC) cell monolayers (HuH-7, HepG2 and Alexander cells), which were either untreated or treated with TNF-alpha/IFN-gamma under normoxic and hypoxic conditions over a period of 16-24 hours. Flow cytometric analysis of apoptosis in Jurkat cells was performed using the annexin-V-FITC/propidium iodide technique. RESULTS rEMAP-II caused a dose-dependent apoptosis in Jurkat T-cells. Co-culture of Jurkat cells with HCC cell monolayers induced significant apoptosis of the Jurkat cells. In general, under normoxic conditions, cytokine-treated HCC cell monolayer caused more apoptosis than untreated cells. This effect was enhanced by hypoxia. Critically, native EMAP-II expressed on the surface of the HCC cells also induced activation of caspase-8 and apoptosis in Jurkat cells, which was partially but significantly blocked by addition of polyclonal antibodies against EMAP-II to the incubation mixture. CONCLUSION Our data suggest that membrane-bound EMAP-II is cytotoxic to lymphocytes and, therefore, might constitute a component of a novel, immunosuppressive pathway by which HCC cells may eliminate attacking T-cells and evade the immune system. The mechanism by which it does so is currently under investigation.
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Affiliation(s)
- Wasek Faisal
- Wolfson Digestive Diseases Centre, University Hospital, University of Nottingham, Nottingham, UK.
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Otake Y, Soundararajan S, Sengupta TK, Kio EA, Smith JC, Pineda-Roman M, Stuart RK, Spicer EK, Fernandes DJ. Overexpression of nucleolin in chronic lymphocytic leukemia cells induces stabilization of bcl2 mRNA. Blood 2007; 109:3069-75. [PMID: 17179226 PMCID: PMC1852223 DOI: 10.1182/blood-2006-08-043257] [Citation(s) in RCA: 171] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2006] [Accepted: 11/08/2006] [Indexed: 01/29/2023] Open
Abstract
B-cell chronic lymphocytic leukemia (CLL) is characterized by the accumulation of clonal B cells that are resistant to apoptosis as a result of bcl2 oncogene overexpression. Studies were done to determine the mechanism for the up-regulation of bcl-2 protein observed in CD19+ CLL cells compared with CD19+ B cells from healthy volunteers. The 11-fold higher level of bcl-2 protein in CLL cells was positively correlated with a 26-fold elevation in the cytosolic level of nucleolin, a bcl2 mRNA-stabilizing protein. Measurements of the bcl2 heterogeneous nuclear/bcl2 mRNA (hnRNA)/mRNA ratios and the rates of bcl2 mRNA decay in cell extracts indicated that the 3-fold higher steady-state level of bcl2 mRNA in CLL cells was the result of increased bcl2 mRNA stability. Nucleolin was present throughout the nucleus and cytoplasm of CLL cells, whereas in normal B cells nucleolin was only detected in the nucleus. The addition of recombinant human nucleolin to extracts of normal B cells markedly slowed the rate of bcl2 mRNA decay. SiRNA knockdown of nucleolin in MCF-7 cells resulted in decreased levels of bcl2mRNA and protein but no change in beta-actin. These results indicate that bcl-2 overexpression in CLL cells is related to stabilization of bcl2 mRNA by nucleolin.
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MESH Headings
- B-Lymphocytes/drug effects
- B-Lymphocytes/metabolism
- Cell Line, Tumor
- Cell Nucleus/metabolism
- Cytoplasm/metabolism
- Female
- Gene Expression
- Genes, bcl-2
- Humans
- In Vitro Techniques
- Leukemia, Lymphocytic, Chronic, B-Cell/genetics
- Leukemia, Lymphocytic, Chronic, B-Cell/metabolism
- Male
- Phosphoproteins/antagonists & inhibitors
- Phosphoproteins/genetics
- Phosphoproteins/metabolism
- Phosphoproteins/pharmacology
- RNA Stability
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- RNA, Small Interfering/genetics
- RNA-Binding Proteins/antagonists & inhibitors
- RNA-Binding Proteins/genetics
- RNA-Binding Proteins/metabolism
- RNA-Binding Proteins/pharmacology
- Recombinant Proteins/genetics
- Recombinant Proteins/pharmacology
- Nucleolin
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Affiliation(s)
- Yoko Otake
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC 29425, USA
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van Horssen R, Rens JAP, Schipper D, Eggermont AMM, ten Hagen TLM. EMAP-II facilitates TNF-R1 apoptotic signalling in endothelial cells and induces TRADD mobilization. Apoptosis 2007; 11:2137-45. [PMID: 17051333 DOI: 10.1007/s10495-006-0284-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Endothelial monocyte-activating polypeptide-II (EMAP-II), a proinflammatory cytokine with antiangiogenic properties, renders tumours sensitive to tumour necrosis factor-alpha (TNF) treatment. The exact mechanisms for this effect remain unclear. Here we show that human endothelial cells (EC) are insensitive to TNF-induced apoptosis but after a short pre-treatment with EMAP-II, EC quickly undergo TNF-induced apoptosis. We further analysed this EMAP-II pre-treatment effect and found no increase of TNF-R1 protein expression but rather an induction of TNF-R1 redistribution from Golgi storage pools to cell membranes. In addition, we observed EMAP-II induced mobilization and membrane expression of the TNF-R1-Associated Death Domain (TRADD) protein. Immunofluorescence co-staining experiments revealed that these two effects occurred at the same time in the same cell but TNF-R1 and TRADD were localized in different vesicles. These findings suggest that EMAP-II sensitises EC to apoptosis by facilitating TNF-R1 apoptotic signalling via TRADD mobilization and introduce a molecular and antiangiogenic explanation for the TNF sensitising properties of EMAP-II in tumours.
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Affiliation(s)
- Remco van Horssen
- Laboratory of Experimental Surgical Oncology, Department of Surgical Oncology, 3000 Daniel den Hoed Cancer Centre, Erasmus MC-Room Ee 0104, PO Box 1738, Rotterdam, The Netherlands
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40
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Abstract
Arrays of >5,000 Saccharomyces cerevisiae proteins were screened to identify proteins that can preferentially bind a small RNA hairpin that contains a clamped adenine motif (CAM). A CAM is required for the replication of Brome Mosaic Virus (BMV), a plant-infecting RNA virus that can replicate in S. cerevisiae. Several hits were selected for further characterization in Nicotiana benthamiana. Pseudouridine Synthase 4 (Pus4) and the Actin Patch Protein 1 (App1) modestly reduced BMV genomic plus-strand RNA accumulation, but dramatically inhibited BMV systemic spread in plants. Pus4 also prevented the encapsidation of a BMV RNA in plants and the reassembly of BMV virions in vitro. These results demonstrate the feasibility of using proteome arrays to identify specific RNA-binding proteins for antiviral activities. Furthermore, the effects of Pus4 suggest that the CAM-containing RNA motif provides a regulatory link between RNA replication and encapsidation.
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Affiliation(s)
- Jian Zhu
- *Department of Pharmacology and Molecular Sciences and
- High Throughput Biology Center, Johns Hopkins University School of Medicine, Baltimore, MD 21205; and
| | - Kodetham Gopinath
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX 77843
| | - Ayaluru Murali
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX 77843
| | - Guanghui Yi
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX 77843
| | | | - Heng Zhu
- *Department of Pharmacology and Molecular Sciences and
- High Throughput Biology Center, Johns Hopkins University School of Medicine, Baltimore, MD 21205; and
| | - Cheng Kao
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX 77843
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Leupold JH, Yang HS, Colburn NH, Asangani I, Post S, Allgayer H. Tumor suppressor Pdcd4 inhibits invasion/intravasation and regulates urokinase receptor (u-PAR) gene expression via Sp-transcription factors. Oncogene 2007; 26:4550-62. [PMID: 17297470 DOI: 10.1038/sj.onc.1210234] [Citation(s) in RCA: 130] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Tumor suppressor Pdcd4 has recently been shown to inhibit invasion by activating activator protein-1 (AP-1); however, little is known of the functionally significant Pdcd4-target genes. The urokinase receptor (u-PAR) promotes invasion/metastasis, and is associated with poor cancer-patient survival. The present study was conducted (1) to investigate a role for Pdcd4 in intravasation, invasion and u-PAR regulation, and (2) to describe mechanisms by which this is achieved. Fourteen cell lines showed reciprocal expression of u-PAR/Pdcd4. Resected tumor/normal tissues of 29 colorectal cancer patients demonstrated a significant inverse correlation between Pdcd4/u-PAR. siRNA-Pdcd4-transfected GEO cells significantly increased endogenous u-PAR mRNA/protein. A u-PAR-promoter-chloramphenicol acetyl transferase (CAT)-reporter was reduced in activity with increasing Pdcd4 expression in RKO. Deletion of a putative Sp-1-binding site (-402/-350) inhibited u-PAR promoter regulation by Pdcd4, this being paralleled by a reduction of Sp1 binding to this region in pdcd4-transfected cells. Pdcd4-transfected cells showed an increase in Sp3 binding to u-PAR promoter region -152/-135, the deletion of which reduces the ability of Pdcd4 to suppress u-PAR promoter activity. Surprisingly, the u-PAR-AP-1 site was not targeted by Pdcd4. Finally, RKO cells overexpressing Pdcd4 showed an inhibition of invasion/intravasation (chicken embryo metastasis assay). These data suggest Pdcd4 as a new negative regulator of intravasation, and qas the invasion-related gene u-PAR. It is the first study to implicate Pdcd4 regulation of gene expression via Sp1/Sp3.
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Affiliation(s)
- J H Leupold
- The Department of Experimental Surgery and Molecular Oncology of Solid Tumors, Medical Faculty Mannheim, University Heidelberg and DKFZ Heidelberg, Germany
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Abstract
Cytoplasmic polyadenylation element-binding protein (CPEB) is a sequence-specific RNA-binding protein that promotes polyadenylation-induced translation. While a CPEB knockout (KO) mouse is sterile but overtly normal, embryo fibroblasts derived from this mouse (MEFs) do not enter senescence in culture as do wild-type MEFs, but instead are immortal. Exogenous CPEB restores senescence in the KO MEFs and also induces precocious senescence in wild-type MEFs. CPEB cannot stimulate senescence in MEFs lacking the tumor suppressors p53, p19ARF, or p16(INK4A); however, the mRNAs encoding these proteins are unlikely targets of CPEB since their expression is the same in wild-type and KO MEFs. Conversely, Ras cannot induce senescence in MEFs lacking CPEB, suggesting that it may lie upstream of CPEB. One target of CPEB regulation is myc mRNA, whose unregulated translation in the KO MEFs may cause them to bypass senescence. Thus, CPEB appears to act as a translational repressor protein to control myc translation and resulting cellular senescence.
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Affiliation(s)
- Irina Groisman
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, Massachusetts 01605, USA
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Sobke ACS, Selimovic D, Orlova V, Hassan M, Chavakis T, Athanasopoulos AN, Schubert U, Hussain M, Thiel G, Preissner KT, Herrmann M. The extracellular adherence protein fromStaphylococcus aureusabrogates angiogenic responses of endothelial cells by blocking Ras activation. FASEB J 2006; 20:2621-3. [PMID: 17077291 DOI: 10.1096/fj.06-5764fje] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The extracellular adherence protein (Eap), a broad-spectrum adhesin secreted by Staphylococcus aureus, was previously shown to curb acute inflammatory responses, presumably through its binding to endothelial cell (EC) ICAM-1. Examining the effect of Eap on endothelial function in more detail, we here show that, in addition, Eap functions as a potent angiostatic agent. Concomitant treatment of EC with purified Eap resulted in the complete blockage of the mitogenic and sprouting responses elicited by vascular endothelial growth factor (VEGF)165 or basic fibroblast growth factor (bFGF). Moreover, the induction of tissue factor and decay-accelerating factor were repressed by Eap, as determined by qRT-polymerase chain reaction (qRT-PCR), with a corresponding reduction in Egr-1 protein up-regulation seen. This angiostatic activity was accompanied by a corresponding inhibition in ERK1/2 phosphorylation, while activation of p38 was not affected. Inhibition occurred downstream of tyrosine kinase receptor activation, as comparable effects were seen on TPA-induced ERK1/2 phosphorylation. Similar to previously described angiostatic agents like angiopoietin-1 or the 16-kDa prolactin fragment, Eap blockage of the Ras/Raf/MEK/ERK cascade was localized by pull-down assay at the level of Ras activation. Eap's combined anti-inflammatory and antiangiogenic properties render this bacterial protein not only an important virulence factor during S. aureus infection but open new perspectives for therapeutic applications in pathological neovascularization.
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Affiliation(s)
- Astrid C S Sobke
- Institute of Medical Microbiology and Hygiene, University of Saarland Hospital, D-66421 Homburg/Saar, Germany.
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44
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Hou Y, Plett PA, Ingram DA, Rajashekhar G, Orschell CM, Yoder MC, March KL, Clauss M. The epidemiology of fungal infections in patients with hematologic malignancies: the SEIFEM-2004 study. Haematologica 2006; 34:1125-32. [PMID: 16863920 DOI: 10.1016/j.exphem.2006.05.021] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2006] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND AND OBJECTIVES The aim of this study was to evaluate the incidence and outcome of invasive fungal infections (IFI) in patients with hematologic malignancies. DESIGN AND METHODS This was a retrospective cohort study of patients admitted between 1999 and 2003 to 18 hematology wards in Italy. Each participating center provided information on all patients with newly diagnosed hematologic malignancies admitted during the survery period and on all episodes of IFI experienced by these patients. RESULTS The cohort was formed of 11,802 patients with hematologic malignacies: acute leukemia (myeloid 3012, lymphoid 1173), chronic leukemia (myeloid 596, lymphoid 1104), lymphoma (Hodgkin's 844, non-Hodgkin's 3457), or multiple myeloma (1616). There were 538 proven or probable IFI (4.6%); 373 (69%) occurred in patients with acute myeloid leukemia. Over half (346/538) were caused by molds (2.9%), in most cases Aspergillus spp. (310/346). The 192 yeast infections (1.6%) included 175 cases of candidemia. Overall and IFI-attributable mortality rates were 2% (209/11802) and 39% (209/538), respectively. The highest IFI-attributable mortality rates were associated with zygomycosis (64%) followed by fusariosis (53%), aspergillosis (42%), and candidemia (33%). INTERPRETATION AND CONCLUSIONS Patients with hematologic malignancies are currently at higher risk of IFI caused by molds than by yeasts, and the incidence of IFI is highest among patients with acute myeloid leukemia. Aspergillus spp are still the most common pathogens, followed by Candida spp. Other agents are rare. The attributable mortality rate for aspergillosis has dropped from 60-70% to approximately 40%. Candidemia-related mortality remains within the 30-40% range reported in literature although the incidence has decreased.
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Affiliation(s)
- Yonghao Hou
- Department of Cellular and Integrative Physiology and Indiana Center for Vascular Biology and Medicine, Indiana University School of Medicine, Indianapolis, IN 46202, USA
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45
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Nemunaitis J, Meyers T, Senzer N, Cunningham C, West H, Vallieres E, Anthony S, Vukelja S, Berman B, Tully H, Pappen B, Sarmiento S, Arzaga R, Duniho S, Engardt S, Meagher M, Cheever MA. Phase I Trial of Sequential Administration of Recombinant DNA and Adenovirus Expressing L523S Protein in Early Stage Non-Small-Cell Lung Cancer. Mol Ther 2006; 13:1185-91. [PMID: 16581300 DOI: 10.1016/j.ymthe.2006.01.013] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2005] [Revised: 01/27/2006] [Accepted: 01/31/2006] [Indexed: 11/29/2022] Open
Abstract
L523S is an immunogenic lung cancer antigen that has demonstrated preclinical safety when the gene is injected intramuscularly as an expressive plasmid (pVAX/L523S) and when delivered following incorporation into an E1B-deleted adenovirus (Ad/L523S). We performed a phase I clinical trial in 13 stage IB, IIA, and IIB non-small-cell lung cancer patients. pVAX/L523S (8 mg on days 0 and 14 in all cohorts) and Ad/L523S (1, 20, 400 x 10(9) vp on days 28 and 56, cohorts 1, 2, and 3, respectively) were administered to 3 patients in each of three cohorts. No significant toxic effect was identified. All but 1 patient demonstrated greater than or equal to twofold elevation in anti-adenovirus antibodies. One of 10 evaluable patients demonstrated L523S-specific antibody by direct IgG ELISA. Two patients developed disease recurrence and all remain alive after a median of 290 days follow-up. Results suggest a high level of safety but evidence of L523S-directed immune activation was limited, suggesting a need for modification of dose, schedule, and site of vaccination (i.e., intradermal) with further clinical testing.
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Affiliation(s)
- John Nemunaitis
- Mary Crowley Medical Research Center, Texas Oncology PA, Dallas, TX 75201, USA.
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Athanasopoulos AN, Economopoulou M, Orlova VV, Sobke A, Schneider D, Weber H, Augustin HG, Eming SA, Schubert U, Linn T, Nawroth PP, Hussain M, Hammes HP, Herrmann M, Preissner KT, Chavakis T. The extracellular adherence protein (Eap) of Staphylococcus aureus inhibits wound healing by interfering with host defense and repair mechanisms. Blood 2006; 107:2720-7. [PMID: 16317095 PMCID: PMC1895382 DOI: 10.1182/blood-2005-08-3140] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2005] [Accepted: 11/14/2005] [Indexed: 12/21/2022] Open
Abstract
Staphylococcus aureus is a major human pathogen interfering with host-cell functions. Impaired wound healing is often observed in S aureus-infected wounds, yet, the underlying mechanisms are poorly defined. Here, we identify the extracellular adherence protein (Eap) of S aureus to be responsible for impaired wound healing. In a mouse wound-healing model wound closure was inhibited in the presence of wild-type S aureus and this effect was reversible when the wounds were incubated with an isogenic Eap-deficient strain. Isolated Eap also delayed wound closure. In the presence of Eap, recruitment of inflammatory cells to the wound site as well as neovascularization of the wound were prevented. In vitro, Eap significantly reduced intercellular adhesion molecule 1 (ICAM-1)-dependent leukocyte-endothelial interactions and diminished the consequent activation of the proinflammatory transcription factor nuclear factor kappaB (NFkappaB) in leukocytes associated with a decrease in expression of tissue factor. Moreover, Eap blocked alphav-integrin-mediated endothelial-cell migration and capillary tube formation, and neovascularization in matrigels in vivo. Collectively, the potent anti-inflammatory and antiangiogenic properties of Eap provide an underlying mechanism that may explain the impaired wound healing in S aureus-infected wounds. Eap may also serve as a lead compound for new anti-inflammatory and antiangiogenic therapies in several pathologies.
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Schwarz MA, Zheng H, Liu J, Corbett S, Schwarz RE. Endothelial-monocyte activating polypeptide II alters fibronectin based endothelial cell adhesion and matrix assembly via alpha5 beta1 integrin. Exp Cell Res 2005; 311:229-39. [PMID: 16248999 DOI: 10.1016/j.yexcr.2005.09.008] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2005] [Revised: 09/07/2005] [Accepted: 09/07/2005] [Indexed: 10/25/2022]
Abstract
Mature Endothelial-Monocyte Activating Polypeptide (mEMAP) II functions as a potent antiangiogenic peptide. Although the anti-tumor effect of mEMAP II has been described, little is known regarding its mechanism of action. Observations that mEMAP II induced apoptosis only in a subset of migrating and proliferating endothelial cells (EC) suggests a targeted effect on cells engaged in angiogenic activities which are known to rely upon cell adhesion and migration. Indeed, we demonstrate that mEMAP II inhibited fibronectin (FN) dependent microvascular EC (MEC) adhesion and spreading and we show that this depends upon the alpha5 beta1 integrin. Immunofluorescence analysis demonstrated that mEMAP II-dependent blockade of FN-alpha5 beta1 interactions was associated with disassembly of both actin stress fiber networks and FN matrix. These findings suggest that mEMAP II blocks MEC adhesion and spreading on fibronectin, via a direct interaction with the integrin alpha5 beta1, thus implicating that alpha5 integrin may be a mediator of mEMAP II's antiangiogenic function.
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Affiliation(s)
- Margaret A Schwarz
- Department of Surgery, University of Medicine and Dentistry of New Jersey-Robert Wood Johnson Medical School, 125 Paterson Street, CAB 7319, New Brunswick, NJ 08903, USA.
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48
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Abstract
Translation and mRNA degradation are affected by a key transition where eukaryotic mRNAs exit translation and assemble an mRNP state that accumulates into processing bodies (P bodies), cytoplasmic sites of mRNA degradation containing non-translating mRNAs, and mRNA degradation machinery. We identify the decapping activators Dhh1p and Pat1p as functioning as translational repressors and facilitators of P body formation. Strains lacking both Dhh1p and Pat1p show strong defects in mRNA decapping and P body formation and are blocked in translational repression. Contrastingly, overexpression of Dhh1p or Pat1p causes translational repression, P body formation, and arrests cell growth. Dhh1p, and its human homolog, RCK/p54, repress translation in vitro, and Dhh1p function is bypassed in vivo by inhibition of translational initiation. These results identify a broadly acting mechanism of translational repression that targets mRNAs for decapping and functions in translational control. We propose this mechanism is competitively balanced with translation, and shifting this balance is an important basis of translational control.
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Affiliation(s)
- Jeff Coller
- Howard Hughes Medical Institute, Department of Molecular and Cellular Biology University of Arizona Tucson, Arizona 85721
| | - Roy Parker
- Howard Hughes Medical Institute, Department of Molecular and Cellular Biology University of Arizona Tucson, Arizona 85721
- *Correspondence:
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Hofweber R, Horn G, Langmann T, Balbach J, Kremer W, Schmitz G, Kalbitzer HR. The influence of cold shock proteins on transcription and translation studied in cell-free model systems. FEBS J 2005; 272:4691-702. [PMID: 16156790 DOI: 10.1111/j.1742-4658.2005.04885.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Cold shock proteins (CSPs) form a family of highly conserved bacterial proteins capable of single-stranded nucleic acid binding. They are suggested to act as RNA chaperones during cold shock inhibiting the formation of RNA secondary structures, which are unfavourable for transcription and translation. To test this commonly accepted theory, isolated CSPs from a mesophilic, thermophilic and a hyperthermophilic bacterium (Bacillus subtilis, Bacillus caldolyticus and Thermotoga maritima) were studied in an Escherichia coli based cell free expression system on their capability of enhancing protein expression by reduction of mRNA secondary structures. The E. coli based expression of chloramphenicol acetyltransferase and of H-Ras served as model systems. We observed a concentration-dependent suppression of transcription and translation by the different CSPs which makes the considered addition of CSPs for enhancing the protein expression in in vitro translation systems obsolete. Protein expression was completely inhibited at CSP concentrations present under cold shock conditions. The CSP concentrations necessary for 50% inhibition were lowest (140 microm) for the protein of the hyperthermophilic and increased when the thermophilic (215 microm) or even the mesophilic protein (451 microm) was used. Isolated in vitro transcription under the influence of CSPs showed that the transcriptory effect is independent from the rest of the cell. It could be shown in a control experiment that the inhibition of protein expression can be removed by addition of hepta-2'-desoxy-thymidylate (dT7); a heptanucleotide that competitively binds to CSP. The data are in line with a hypothesis that CSPs act on bulk protein expression not as RNA chaperones but inhibit their transcription and translation by rather unspecific nucleic acid binding.
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Affiliation(s)
- Roland Hofweber
- Institut für Biophysik und Physikalische Biochemie, Universität Regensburg, Germany
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50
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Haggar A, Shannon O, Norrby-Teglund A, Flock JI. Dual Effects of Extracellular Adherence Protein fromStaphylococcus aureuson Peripheral Blood Mononuclear Cells. J Infect Dis 2005; 192:210-7. [PMID: 15962215 DOI: 10.1086/430948] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2004] [Accepted: 02/24/2005] [Indexed: 11/03/2022] Open
Abstract
Extracellular adherence protein (Eap) has been suggested as an important virulence factor of Staphylococcus aureus because it enhances bacterial adherence and internalization into eukaryotic cells, interference with T cells, and neutrophil adherence to endothelial cells. We demonstrate that Eap has dual effects on peripheral blood mononuclear cells, depending on its concentration. At low concentrations (up to 9 microg/mL), Eap induces a proliferative response; at higher concentrations, it causes a significant inhibition of T cell proliferation induced by S. aureus supernatants toxic shock syndrome toxin-1 or phytohemagglutinin. A marked increase in apoptotic (i.e., Annexin V and propidium iodide positive) T and B cells could be demonstrated after exposure to the inhibitory concentration of Eap. Human anti-Eap antibodies prepared from polyspecific immunoglobulin G (IgG) blocked the immunomodulatory effects of Eap. Our results demonstrate novel immunomodulatory activities of Eap and identify potential mechanisms of action of intravenous IgG therapy in the treatment of S. aureus infections.
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Affiliation(s)
- Axana Haggar
- Department of Laboratory Medicine, Karolinska Institutet, Huddinge University Hospital, Stockholm, Sweden
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