1
|
Zhuang W, Liu C, Hong Y, Zheng Y, Huang M, Tang H, Zhao L, Huang Z, Tu M, Yu L, Chen J, Zhang Y, Chen X, Lin F, Gao Q, Yu C, Huang Y. Tumor-suppressive miR-4732-3p is sorted into fucosylated exosome by hnRNPK to avoid the inhibition of lung cancer progression. J Exp Clin Cancer Res 2024; 43:123. [PMID: 38654325 PMCID: PMC11036635 DOI: 10.1186/s13046-024-03048-1] [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: 12/19/2023] [Accepted: 04/16/2024] [Indexed: 04/25/2024] Open
Abstract
BACKGROUND Aberrant fucosylation observed in cancer cells contributes to an augmented release of fucosylated exosomes into the bloodstream, where miRNAs including miR-4732-3p hold promise as potential tumor biomarkers in our pilot study. However, the mechanisms underlying the sorting of miR-4732-3p into fucosylated exosomes during lung cancer progression remain poorly understood. METHODS A fucose-captured strategy based on lentil lectin-magnetic beads was utilized to isolate fucosylated exosomes and evaluate the efficiency for capturing tumor-derived exosomes using nanoparticle tracking analysis (NTA). Fluorescence in situ hybridization (FISH) and qRT-PCR were performed to determine the levels of miR-4732-3p in non-small cell lung cancer (NSCLC) tissue samples. A co-culture system was established to assess the release of miRNA via exosomes from NSCLC cells. RNA immunoprecipitation (RIP) and miRNA pull-down were applied to validate the interaction between miR-4732-3p and heterogeneous nuclear ribonucleoprotein K (hnRNPK) protein. Cell functional assays, cell derived xenograft, dual-luciferase reporter experiments, and western blot were applied to examine the effects of miR-4732-3p on MFSD12 and its downstream signaling pathways, and the impact of hnRNPK in NSCLC. RESULTS We enriched exosomes derived from NSCLC cells using the fucose-captured strategy and detected a significant upregulation of miR-4732-3p in fucosylated exosomes present in the serum, while its expression declined in NSCLC tissues. miR-4732-3p functioned as a tumor suppressor in NSCLC by targeting 3'UTR of MFSD12, thereby inhibiting AKT/p21 signaling pathway to induce cell cycle arrest in G2/M phase. NSCLC cells preferentially released miR-4732-3p via exosomes instead of retaining them intracellularly, which was facilitated by the interaction of miR-4732-3p with hnRNPK protein for selective sorting into fucosylated exosomes. Moreover, knockdown of hnRNPK suppressed NSCLC cell proliferation, with the elevated levels of miR-4732-3p in NSCLC tissues but the decreased expression in serum fucosylated exosomes. CONCLUSIONS NSCLC cells escape suppressive effects of miR-4732-3p through hnRNPK-mediated sorting of them into fucosylated exosomes, thus supporting cell malignant properties and promoting NSCLC progression. Our study provides a promising biomarker for NSCLC and opens a novel avenue for NSCLC therapy by targeting hnRNPK to prevent the "exosome escape" of tumor-suppressive miR-4732-3p from NSCLC cells.
Collapse
Affiliation(s)
- Wanzhen Zhuang
- Shengli Clinical Medical College, Fujian Medical University, Fuzhou, 350001, China
- Department of Clinical Laboratory, Fujian Provincial Hospital, Fuzhou, 350001, China
| | - Chengxiu Liu
- State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Signaling Network, School of Life Sciences, Xiamen University, Xiamen, 361102, China
- Institute of Future Technology, Beijing Hotgen Biotech Co., Ltd, Beijing, 102600, China
| | - Yilin Hong
- State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Signaling Network, School of Life Sciences, Xiamen University, Xiamen, 361102, China
| | - Yue Zheng
- Shengli Clinical Medical College, Fujian Medical University, Fuzhou, 350001, China
- Department of Clinical Laboratory, Fujian Provincial Hospital, Fuzhou, 350001, China
| | - Minjian Huang
- Shengli Clinical Medical College, Fujian Medical University, Fuzhou, 350001, China
- Center for Experimental Research in Clinical Medicine, Fujian Provincial Hospital, Fuzhou, 350001, China
| | - Haijun Tang
- Shengli Clinical Medical College, Fujian Medical University, Fuzhou, 350001, China
- Center for Experimental Research in Clinical Medicine, Fujian Provincial Hospital, Fuzhou, 350001, China
| | - Lilan Zhao
- Shengli Clinical Medical College, Fujian Medical University, Fuzhou, 350001, China
- Department of Thoracic Surgery, Fujian Provincial Hospital, Fuzhou, 350001, China
| | - Zhixin Huang
- Department of Clinical Laboratory, Fujian Provincial Hospital, Fuzhou, 350001, China
- Integrated Chinese and Western Medicine College, Fujian University of Traditional Chinese Medicine, Fuzhou, 350108, China
| | - Mingshu Tu
- Shengli Clinical Medical College, Fujian Medical University, Fuzhou, 350001, China
- Department of Clinical Laboratory, Fujian Provincial Hospital, Fuzhou, 350001, China
| | - Lili Yu
- Shengli Clinical Medical College, Fujian Medical University, Fuzhou, 350001, China
- Department of Clinical Laboratory, Fujian Provincial Hospital, Fuzhou, 350001, China
| | - Jianlin Chen
- Shengli Clinical Medical College, Fujian Medical University, Fuzhou, 350001, China
- Department of Clinical Laboratory, Fujian Provincial Hospital, Fuzhou, 350001, China
| | - Yi Zhang
- Shengli Clinical Medical College, Fujian Medical University, Fuzhou, 350001, China
- Department of Clinical Laboratory, Fujian Provincial Hospital, Fuzhou, 350001, China
| | - Xiongfeng Chen
- Shengli Clinical Medical College, Fujian Medical University, Fuzhou, 350001, China
- Department of Scientific Research, Fujian Provincial Hospital, Fuzhou, 350001, China
| | - Fan Lin
- Department of Geriatric Medicine, Fujian Provincial Hospital, Fuzhou, 350001, China
- Fujian Provincial Center for Geriatrics, Fujian Provincial Hospital, Fuzhou, 350001, China
| | - Qi Gao
- Institute of Future Technology, Beijing Hotgen Biotech Co., Ltd, Beijing, 102600, China
| | - Chundong Yu
- Shengli Clinical Medical College, Fujian Medical University, Fuzhou, 350001, China.
- State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Signaling Network, School of Life Sciences, Xiamen University, Xiamen, 361102, China.
- Center for Experimental Research in Clinical Medicine, Fujian Provincial Hospital, Fuzhou, 350001, China.
| | - Yi Huang
- Shengli Clinical Medical College, Fujian Medical University, Fuzhou, 350001, China.
- Department of Clinical Laboratory, Fujian Provincial Hospital, Fuzhou, 350001, China.
- Center for Experimental Research in Clinical Medicine, Fujian Provincial Hospital, Fuzhou, 350001, China.
- Fujian Provincial Center for Geriatrics, Fujian Provincial Hospital, Fuzhou, 350001, China.
- Central Laboratory, Fujian Provincial Hospital, Fuzhou, 350001, China.
- Fujian Provincial Key Laboratory of Critical Care Medicine, Fujian Provincial Key Laboratory of Cardiovascular Disease, Fuzhou, 350001, China.
| |
Collapse
|
2
|
Wu S, Dai X, Zhu Z, Fan D, Jiang S, Dong Y, Chen B, Xie Q, Yao Z, Li Q, Thorne RF, Lu Y, Gu H, Hu W. Reciprocal regulation of lncRNA MEF and c-Myc drives colorectal cancer tumorigenesis. Neoplasia 2024; 49:100971. [PMID: 38301392 PMCID: PMC10847691 DOI: 10.1016/j.neo.2024.100971] [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: 08/23/2023] [Revised: 01/09/2024] [Accepted: 01/09/2024] [Indexed: 02/03/2024]
Abstract
More than half of all cancers demonstrate aberrant c-Myc expression, making this arguably the most important human oncogene. Deregulated long non-coding RNAs (lncRNAs) are also commonly implicated in tumorigenesis, and some limited examples have been established where lncRNAs act as biological tuners of c-Myc expression and activity. Here, we demonstrate that the lncRNA denoted c-Myc Enhancing Factor (MEF) enjoys a cooperative relationship with c-Myc, both as a transcriptional target and driver of c-Myc expression. Mechanistically, MEF functions by binding to and stabilizing the expression of hnRNPK in colorectal cancer cells. The MEF-hnRNPK interaction serves to disrupt binding between hnRNPK and the E3 ubiquitin ligase TRIM25, which attenuates TRIM25-dependent hnRNPK ubiquitination and proteasomal destruction. In turn, the stabilization of hnRNPK through MEF enhances c-Myc expression by augmenting the translation c-Myc. Moreover, modulating the expression of MEF in shRNA-mediated knockdown and overexpression studies revealed that MEF expression is essential for colorectal cancer cell proliferation and survival, both in vitro and in vivo. From the clinical perspective, we show that MEF expression is differentially increased in colorectal cancer tissues compared to normal adjacent tissues. Further, correlations exist between MEF, c-Myc, and hnRNPK suggesting the MEF-c-Myc positive feedback loop is active in patients. Together these data demonstrate that MEF is a pivotal partner of the c-Myc network and propose MEF as a valuable therapeutic target for colorectal cancer.
Collapse
Affiliation(s)
- Shuang Wu
- Department of Immunology, School of Basic Medical Sciences, Anhui Medical University, Hefei 230027, China
| | - Xiangyu Dai
- Department of Immunology, School of Basic Medical Sciences, Anhui Medical University, Hefei 230027, China; Translational Research Institute, People's Hospital of Zhengzhou University, Academy of Medical Science, Henan International Joint Laboratory of Non-coding RNA and Metabolism in Cancer, Tianjian Laboratory of Advanced Biomedical Sciences, State Key Laboratory of Esophageal Cancer Prevention and Treatment, Zhengzhou University, Zhengzhou, 450003, China
| | - Zhipu Zhu
- Translational Research Institute, People's Hospital of Zhengzhou University, Academy of Medical Science, Henan International Joint Laboratory of Non-coding RNA and Metabolism in Cancer, Tianjian Laboratory of Advanced Biomedical Sciences, State Key Laboratory of Esophageal Cancer Prevention and Treatment, Zhengzhou University, Zhengzhou, 450003, China
| | - Dianhui Fan
- Department of Immunology, School of Basic Medical Sciences, Anhui Medical University, Hefei 230027, China
| | - Su Jiang
- Department of Immunology, School of Basic Medical Sciences, Anhui Medical University, Hefei 230027, China
| | - Yi Dong
- Translational Research Institute, People's Hospital of Zhengzhou University, Academy of Medical Science, Henan International Joint Laboratory of Non-coding RNA and Metabolism in Cancer, Tianjian Laboratory of Advanced Biomedical Sciences, State Key Laboratory of Esophageal Cancer Prevention and Treatment, Zhengzhou University, Zhengzhou, 450003, China
| | - Bing Chen
- Translational Research Institute, People's Hospital of Zhengzhou University, Academy of Medical Science, Henan International Joint Laboratory of Non-coding RNA and Metabolism in Cancer, Tianjian Laboratory of Advanced Biomedical Sciences, State Key Laboratory of Esophageal Cancer Prevention and Treatment, Zhengzhou University, Zhengzhou, 450003, China
| | - Qi Xie
- Translational Research Institute, People's Hospital of Zhengzhou University, Academy of Medical Science, Henan International Joint Laboratory of Non-coding RNA and Metabolism in Cancer, Tianjian Laboratory of Advanced Biomedical Sciences, State Key Laboratory of Esophageal Cancer Prevention and Treatment, Zhengzhou University, Zhengzhou, 450003, China
| | - Zhihui Yao
- Translational Research Institute, People's Hospital of Zhengzhou University, Academy of Medical Science, Henan International Joint Laboratory of Non-coding RNA and Metabolism in Cancer, Tianjian Laboratory of Advanced Biomedical Sciences, State Key Laboratory of Esophageal Cancer Prevention and Treatment, Zhengzhou University, Zhengzhou, 450003, China
| | - Qun Li
- Department of Immunology, School of Basic Medical Sciences, Anhui Medical University, Hefei 230027, China
| | - Rick Francis Thorne
- Translational Research Institute, People's Hospital of Zhengzhou University, Academy of Medical Science, Henan International Joint Laboratory of Non-coding RNA and Metabolism in Cancer, Tianjian Laboratory of Advanced Biomedical Sciences, State Key Laboratory of Esophageal Cancer Prevention and Treatment, Zhengzhou University, Zhengzhou, 450003, China
| | - Yao Lu
- Department of Anesthesiology, the First Affiliated of Anhui Medical University, Anhui Medical University, Hefei 230022, China.
| | - Hao Gu
- Department of Immunology, School of Basic Medical Sciences, Anhui Medical University, Hefei 230027, China.
| | - Wanglai Hu
- Department of Immunology, School of Basic Medical Sciences, Anhui Medical University, Hefei 230027, China; Translational Research Institute, People's Hospital of Zhengzhou University, Academy of Medical Science, Henan International Joint Laboratory of Non-coding RNA and Metabolism in Cancer, Tianjian Laboratory of Advanced Biomedical Sciences, State Key Laboratory of Esophageal Cancer Prevention and Treatment, Zhengzhou University, Zhengzhou, 450003, China.
| |
Collapse
|
3
|
Arendt-Tranholm A, Mwirigi JM, Price TJ. RNA isoform expression landscape of the human dorsal root ganglion (DRG) generated from long read sequencing. bioRxiv 2023:2023.10.28.564535. [PMID: 37961262 PMCID: PMC10634934 DOI: 10.1101/2023.10.28.564535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2023]
Abstract
Splicing is a post-transcriptional RNA processing mechanism that enhances genomic complexity by creating multiple isoforms from the same gene. Diversity in splicing in the mammalian nervous system is associated with neuronal development, synaptic function and plasticity, and is also associated with diseases of the nervous system ranging from neurodegeneration to chronic pain. We aimed to characterize the isoforms expressed in the human peripheral nervous system, with the goal of creating a resource to identify novel isoforms of functionally relevant genes associated with somatosensation and nociception. We used long read sequencing (LRS) to document isoform expression in the human dorsal root ganglia (hDRG) from 3 organ donors. Isoforms were validated in silico by confirming expression in hDRG short read sequencing (SRS) data from 3 independent organ donors. 19,547 isoforms of protein-coding genes were detected using LRS and validated with SRS and strict expression cutoffs. We identified 763 isoforms with at least one previously undescribed splice-junction. Previously unannotated isoforms of multiple pain-associated genes, including ASIC3, MRGPRX1 and HNRNPK were identified. In the novel isoforms of ASIC3, a region comprising ~35% of the 5'UTR was excised. In contrast, a novel splice-junction was utilized in isoforms of MRGPRX1 to include an additional exon upstream of the start-codon, consequently adding a region to the 5'UTR. Novel isoforms of HNRNPK were identified which utilized previously unannotated splice-sites to both excise exon 14 and include a sequence in the 5' end of exon 13. The insertion and deletion in the coding region was predicted to excise a serine-phosphorylation site favored by cdc2, and replace it with a tyrosine-phosphorylation site potentially phosphorylated by SRC. We also independently confirm a recently reported DRG-specific splicing event in WNK1 that gives insight into how painless peripheral neuropathy occurs when this gene is mutated. Our findings give a clear overview of mRNA isoform diversity in the hDRG obtained using LRS. Using this work as a foundation, an important next step will be to use LRS on hDRG tissues recovered from people with a history of chronic pain. This should enable identification of new drug targets and a better understanding of chronic pain that may involve aberrant splicing events.
Collapse
Affiliation(s)
- Asta Arendt-Tranholm
- School of Behavioral and Brain Sciences, Department of Neuroscience and Center for Advanced Pain Studies, The University of Texas at Dallas, 800 W Campbell Rd, Richardson, Texas, 75080
| | - Juliet M. Mwirigi
- School of Behavioral and Brain Sciences, Department of Neuroscience and Center for Advanced Pain Studies, The University of Texas at Dallas, 800 W Campbell Rd, Richardson, Texas, 75080
| | - Theodore J. Price
- School of Behavioral and Brain Sciences, Department of Neuroscience and Center for Advanced Pain Studies, The University of Texas at Dallas, 800 W Campbell Rd, Richardson, Texas, 75080
| |
Collapse
|
4
|
Zhuang LP, Gao WJ, Fang LL, Zeng GR, Ye QY, Dai XM, Zhang J, Chen XC. HnRNPK is involved in stress-induced depression-like behavior via ERK-BDNF pathway in mice. Neurochem Int 2023; 169:105589. [PMID: 37543308 DOI: 10.1016/j.neuint.2023.105589] [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: 06/08/2023] [Revised: 07/26/2023] [Accepted: 07/30/2023] [Indexed: 08/07/2023]
Abstract
As a ubiquitous RNA-binding protein, heterogeneous nuclear ribonucleoprotein K (hnRNPK) interacts with numerous nucleic acids and proteins and is involved in various cellular functions. Available literature indicates that it can regulate dendritic spine density through the extracellular signal-regulating kinase (ERK) - brain-derived neurotrophic factor (BDNF) pathway, which is crucial to retain the synaptic plasticity in patients with major depressive disorder (MDD) and mouse depression models. However, ERK upstream regulatory kinase has not been fully elucidated. Furthermore, it remains unexplored whether hnRNPK may impact the depressive condition via the ERK pathway. The present study addressed this issue by integrating approaches of genetics, molecular biology, behavioral testing. We found that hnRNPK in the brain was mainly distributed in the hippocampal neurons; that it was significantly downregulated in mice that displayed stress-induced depression-like behaviors; and that the level of hnRNPK markedly decreased in MDD patients from the GEO database. Further in vivo and in vitro analyses revealed that the changes in the expressions of BDNF and PSD95 and in the phosphorylation of ERK (Thr202/Tyr204) paralleled the variation of hnRNPK levels in the ventral hippocampal neurons in mice with depression-like behaviors. Finally, esketamine treatment significantly increased the level of hnRNPK in mice. These findings evidence that hnRNPK involved in the pathogenesis of depression via the ERK-BDNF pathway, pinpointing hnRNPK as a potential therapeutic target in treating MDD patients.
Collapse
Affiliation(s)
- Lv-Ping Zhuang
- Department of Neurology, Fujian Medical University Union Hospital, Fujian Key Laboratory of Molecular Neurology and Institute of Neuroscience, Fujian Medical University; Fuzhou, China
| | - Wei-Jie Gao
- Department of Neurology, Fujian Medical University Union Hospital, Fujian Key Laboratory of Molecular Neurology and Institute of Neuroscience, Fujian Medical University; Fuzhou, China
| | - Liu-Lv Fang
- Department of Neurology, Fujian Medical University Union Hospital, Fujian Key Laboratory of Molecular Neurology and Institute of Neuroscience, Fujian Medical University; Fuzhou, China
| | - Gui-Rong Zeng
- Department of Neurology, Fujian Medical University Union Hospital, Fujian Key Laboratory of Molecular Neurology and Institute of Neuroscience, Fujian Medical University; Fuzhou, China
| | - Qin-Yong Ye
- Department of Neurology, Fujian Medical University Union Hospital, Fujian Key Laboratory of Molecular Neurology and Institute of Neuroscience, Fujian Medical University; Fuzhou, China
| | - Xiao-Man Dai
- Department of Neurology, Fujian Medical University Union Hospital, Fujian Key Laboratory of Molecular Neurology and Institute of Neuroscience, Fujian Medical University; Fuzhou, China
| | - Jing Zhang
- Department of Neurology, Fujian Medical University Union Hospital, Fujian Key Laboratory of Molecular Neurology and Institute of Neuroscience, Fujian Medical University; Fuzhou, China.
| | - Xiao-Chun Chen
- Department of Neurology, Fujian Medical University Union Hospital, Fujian Key Laboratory of Molecular Neurology and Institute of Neuroscience, Fujian Medical University; Fuzhou, China.
| |
Collapse
|
5
|
Jin L, Li T, Hong Y, Mao R, Li X, Zhu C, Mu J, Zhou J, Pan L, Que Y, Xia Y, Zhang Y, Li S. Activation of NLRP2 in Triple-Negative Breast Cancer sensitizes chemotherapeutic therapy through facilitating hnRNPK function. Biochem Pharmacol 2023; 215:115703. [PMID: 37499769 DOI: 10.1016/j.bcp.2023.115703] [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: 04/28/2023] [Revised: 07/21/2023] [Accepted: 07/24/2023] [Indexed: 07/29/2023]
Abstract
Nucleotide-binding oligomerization domain (NOD)-like receptor type 2 protein (NLRP2) was reported to inhibit NF-κB in response to inflammatory stimuli, but its role in tumors remains elusive. We screened out NLRP2 from mouse models of breast cancer metastasis. Bioinformatics analysis showed NLRP2 expression was positively correlated with survival rate and negatively correlated with the potential of cancer metastasis. Its significance in Triple-Negative Breast Cancer (TNBC) was investigated by gain- and loss-of-function studies in vivo and vitro. Re-expression of NLRP2 dramatically inhibited the growth and metastasis of the xenograft model of MDA-MB-231 cells. Mechanically, NLRP2 confined hnRNPK within cytoplasm, which in turn blocked vimentin mRNA production. Not only that, NLRP2 further enhanced the H2O2-induced high level of p53&Bax and hence dramatically increased the apoptosis rate (fivefold). Likewise, carboplatin-treated cells showed decreased cell viability, suggesting that patients of TNBC with high level of NLRP2 respond well to chemotherapeutics. Under the stimulus of H2O2, NLRP2-hnRNPK no longer stayed in the cytoplasm, but entered the nucleus to increase the expression of p53 and hence enhanced corresponding apoptosis effect, increasing Bax expression. It suggested that NLRP2 helps p53 enter the nucleus to induce apoptosis. This study revealed a novel function of NLRP2 that modulated oncogenic and anti-oncogenic characteristics of hnRNPK, and provided a new biomarker for TNBC chemotherapy.
Collapse
Affiliation(s)
- Lai Jin
- Department of Pharmacology, Nanjing Medical University, Nanjing 211116, PR China.
| | - Tiantian Li
- Department of Pharmacology, Nanjing Medical University, Nanjing 211116, PR China
| | - Yali Hong
- Department of Pharmacology, Nanjing Medical University, Nanjing 211116, PR China
| | - Rongchen Mao
- Department of Pharmacology, Nanjing Medical University, Nanjing 211116, PR China
| | - Xu Li
- Department of Pharmacology, Nanjing Medical University, Nanjing 211116, PR China
| | - Chao Zhu
- Department of Pharmacology, Nanjing Medical University, Nanjing 211116, PR China
| | - Junyu Mu
- Department of Pharmacology, Nanjing Medical University, Nanjing 211116, PR China
| | - Jun Zhou
- Department of Pharmacology, Nanjing Medical University, Nanjing 211116, PR China
| | - Lihua Pan
- Department of Pharmacology, Nanjing Medical University, Nanjing 211116, PR China
| | - Yuhui Que
- Department of Pharmacology, Nanjing Medical University, Nanjing 211116, PR China
| | - Yidong Xia
- Department of Pharmacology, Nanjing Medical University, Nanjing 211116, PR China
| | - Yuheng Zhang
- Department of Pharmacology, Nanjing Medical University, Nanjing 211116, PR China
| | - Shengnan Li
- Department of Pharmacology, Nanjing Medical University, Nanjing 211116, PR China.
| |
Collapse
|
6
|
Zhang T, Leng Y, Duan M, Li Z, Ma Y, Huang C, Shi Q, Wang Y, Wang C, Liu D, Zhao X, Cheng S, Liu A, Zhou Y, Liu J, Pan Z, Zhang H, Shen L, Zhao H. LncRNA GAS5- hnRNPK axis inhibited ovarian cancer progression via inhibition of AKT signaling in ovarian cancer cells. Discov Oncol 2023; 14:157. [PMID: 37639158 PMCID: PMC10462600 DOI: 10.1007/s12672-023-00764-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2023] [Accepted: 08/04/2023] [Indexed: 08/29/2023] Open
Abstract
BACKGROUND The incidence of ovarian cancer ranks third among gynecologic malignancies, but the mortality rate ranks first. METHODS The expression of GAS5 is low in ovarian cancer and is associated with the low survival of ovarian cancer patients according to public ovarian cancer databases. GAS5 overexpression inhibited ovarian malignancy by affecting the proliferation and migratory abilities in OVCAR3 and A2780 cells. GAS5 overexpression increased the rate of cell apoptosis, and the cells were blocked in the G1 phase as assessed by flow cytometry. RESULTS We found that hnRNPK was a potential target gene, which was regulated negatively by GAS5 based on RNA-pulldown and mass spectrometry analysis. Mechanistically, GAS5 affected the inhibition of the PI3K/AKT/mTOR pathways and bound the protein of hnRNPK, which influenced hnRNPK stability. Furthermore, rescue assays demonstrated hnRNPK was significantly involved in the progression of ovarian cancer. CONCLUSIONS Our study showed one of the mechanisms that GAS5 inhibited ovarian cancer metastasis by down-regulating hnRNPK expression, and GAS5 can be used to predict the prognosis of ovarian cancer patients.
Collapse
Affiliation(s)
- Te Zhang
- Hubei Key Laboratory of Embryonic Stem Cell Research, Hubei University of Medicine, Shiyan, Hubei, China
- Biomedical Research Institute, Hubei University of Medicine, 442000, Shiyan, Hubei, China
| | - Yahui Leng
- Hubei Key Laboratory of Embryonic Stem Cell Research, Hubei University of Medicine, Shiyan, Hubei, China
| | - Mengjing Duan
- Hubei Key Laboratory of Embryonic Stem Cell Research, Hubei University of Medicine, Shiyan, Hubei, China
- Hengdian Central Health Center, Huangpi District, Wuhan, Hubei, China
| | - Zihang Li
- Hubei Key Laboratory of Embryonic Stem Cell Research, Hubei University of Medicine, Shiyan, Hubei, China
| | - Yongqing Ma
- Hubei Key Laboratory of Embryonic Stem Cell Research, Hubei University of Medicine, Shiyan, Hubei, China
| | - Chengyang Huang
- Hubei Key Laboratory of Embryonic Stem Cell Research, Hubei University of Medicine, Shiyan, Hubei, China
| | - Qin Shi
- Hubei Key Laboratory of Embryonic Stem Cell Research, Hubei University of Medicine, Shiyan, Hubei, China
| | - Yi Wang
- Hubei Key Laboratory of Embryonic Stem Cell Research, Hubei University of Medicine, Shiyan, Hubei, China
| | - Chengcheng Wang
- Hubei Key Laboratory of Embryonic Stem Cell Research, Hubei University of Medicine, Shiyan, Hubei, China
| | - Dandan Liu
- Hubei Key Laboratory of Embryonic Stem Cell Research, Hubei University of Medicine, Shiyan, Hubei, China
| | - Xuan Zhao
- The Second Clinical College, Xi'an Medical University, Xi'an, Shaanxi, China
| | - Shuang Cheng
- Hubei Key Laboratory of Embryonic Stem Cell Research, Hubei University of Medicine, Shiyan, Hubei, China
| | - Ao Liu
- Hubei Key Laboratory of Embryonic Stem Cell Research, Hubei University of Medicine, Shiyan, Hubei, China
| | - Yang Zhou
- Hubei Key Laboratory of Embryonic Stem Cell Research, Hubei University of Medicine, Shiyan, Hubei, China
| | - Jiaqi Liu
- Hubei Key Laboratory of Embryonic Stem Cell Research, Hubei University of Medicine, Shiyan, Hubei, China
| | - Zhongqiu Pan
- Hubei Key Laboratory of Embryonic Stem Cell Research, Hubei University of Medicine, Shiyan, Hubei, China
| | - Huimei Zhang
- Hubei Key Laboratory of Embryonic Stem Cell Research, Hubei University of Medicine, Shiyan, Hubei, China
| | - Li Shen
- Hubei Key Laboratory of Embryonic Stem Cell Research, Hubei University of Medicine, Shiyan, Hubei, China.
- Department of Clinical Oncology, Taihe Hospital, Hubei University of Medicine, 30 South Renmin Road, 442000, Shiyan, Hubei, China.
| | - Hongyan Zhao
- Hubei Key Laboratory of Embryonic Stem Cell Research, Hubei University of Medicine, Shiyan, Hubei, China.
- Department of Obstetrics and Gynecology, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China.
| |
Collapse
|
7
|
Su Y, Guo Y, Guo J, Zeng T, Wang T, Liu W. Study of FOXO1-interacting proteins using TurboID-based proximity labeling technology. BMC Genomics 2023; 24:146. [PMID: 36964488 PMCID: PMC10039511 DOI: 10.1186/s12864-023-09238-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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Accepted: 03/09/2023] [Indexed: 03/26/2023] Open
Abstract
BACKGROUND Protein‒protein interactions (PPIs) are the foundation of the life activities of cells. TurboID is a biotin ligase with higher catalytic efficiency than BioID or APEX that reduces the required labeling time from 18 h to 10 min. Since many proteins participate in binding and catalytic events that are very short-lived, it is theoretically possible to find relatively novel binding proteins using the TurboID technique. Cell proliferation, apoptosis, autophagy, oxidative stress and metabolic disorders underlie many diseases, and forkhead box transcription factor 1 (FOXO1) plays a key role in these physiological and pathological processes. RESULTS The FOXO1-TurboID fusion gene was transfected into U251 astrocytes, and a cell line stably expressing FOXO1 was constructed. While constructing the FOXO1 overexpression plasmid, we also added the gene sequence of TurboID to perform biotin labeling experiments in the successfully fabricated cell line to look for FOXO1 reciprocal proteins. Label-free mass spectrometry analysis was performed, and 325 interacting proteins were found. A total of 176 proteins were identified in the FOXO1 overexpression group, and 227 proteins were identified in the Lipopolysaccharide -treated group (Lipopolysaccharide, LPS). Wild-type U251 cells were used to exclude interference from nonspecific binding. The FOXO1-interacting proteins hnRNPK and RBM14 were selected for immunoprecipitation and immunofluorescence verification. CONCLUSION The TurboID technique was used to select the FOXO1-interacting proteins, and after removing the proteins identified in the blank group, a large number of interacting proteins were found in both positive groups. This study lays a foundation for further study of the function of FOXO1 and the regulatory network in which it is involved.
Collapse
Affiliation(s)
- Yanting Su
- School of Basic Medical Sciences, Xianning Medical College, Hubei University of Science and Technology, Xianning, Hubei, 437000, China
| | - Yuanyuan Guo
- School of Pharmacy, Xianning Medical College, Hubei University of Science and Technology, Xianning, Hubei, 437000, China
| | - Jieyu Guo
- School of Pharmacy, Xianning Medical College, Hubei University of Science and Technology, Xianning, Hubei, 437000, China
| | - Ting Zeng
- School of Pharmacy, Xianning Medical College, Hubei University of Science and Technology, Xianning, Hubei, 437000, China
| | - Ting Wang
- Department of Pediatric Neurology, Maternal and Child Health Hospital of Hubei Province, Wuhan, Hubei, 430000, China.
| | - Wu Liu
- Medicine Research Institute, Hubei Key Laboratory of Diabetes and Angiopathy, Xianning Medical College, Hubei University of Science and Technology, Xianning, Hubei, 437000, China.
| |
Collapse
|
8
|
Li Y, Zhao H, Li N, Yuan C, Dong N, Wen J, Li Z, Wang Q, Wang L, Mao H. BBOX1-AS1 mediates trophoblast cells dysfunction via regulating hnRNPK/GADD45A axis†. Biol Reprod 2023; 108:408-422. [PMID: 36617174 DOI: 10.1093/biolre/ioad002] [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: 11/01/2022] [Revised: 12/20/2022] [Accepted: 01/01/2023] [Indexed: 01/09/2023] Open
Abstract
Recurrent pregnancy loss (RPL) is a common pathological problem during pregnancy, and its clinical etiology is complex and unclear. Dysfunction of trophoblasts may cause a series of pregnancy complications, including preeclampsia, fetal growth restriction, and RPL. Recently, lncRNAs have been found to be closely related to the occurrence and regulation of pregnancy-related diseases, but few studies have focused on their role in RPL. In this study, we identified a novel lncRNA BBOX1-AS1 that was significantly upregulated in villous tissues and serum of RPL patients. Functionally, BBOX1-AS1 inhibited proliferation, migration, invasion, tube formation and promoted apoptosis of trophoblast cells. Mechanistically, overexpression of BBOX1-AS1 activated the p38 and JNK MAPK signaling pathways by upregulating GADD45A expression. Further studies indicated that BBOX1-AS1 could increase the stability of GADD45A mRNA by binding hnRNPK and ultimately cause abnormal trophoblast function. Collectively, our study highlights that the BBOX1-AS1/hnRNPK/GADD45A axis plays an important role in trophoblast-induced RPL and that BBOX1-AS1 may serve as a potential target for the diagnosis of RPL.
Collapse
Affiliation(s)
- Yali Li
- Department of Clinical Laboratory, The Second Hospital of Shandong University, Jinan, Shandong, China
| | - Hui Zhao
- Department of Clinical Laboratory, The Second Hospital of Shandong University, Jinan, Shandong, China
| | - Ning Li
- Department of Clinical Laboratory, The Second Hospital of Shandong University, Jinan, Shandong, China
| | - Chao Yuan
- Department of Clinical Laboratory, The Second Hospital of Shandong University, Jinan, Shandong, China
| | - Nana Dong
- Department of Clinical Laboratory, The Second Hospital of Shandong University, Jinan, Shandong, China
| | - Jin Wen
- Department of Clinical Laboratory, The Second Hospital of Shandong University, Jinan, Shandong, China
| | - Zihui Li
- Department of Clinical Laboratory, The Second Hospital of Shandong University, Jinan, Shandong, China
| | - Qun Wang
- Key Laboratory of Infection and Immunity of Shandong Province, Department of Immunology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
| | - Lina Wang
- Department of Clinical Laboratory, The Second Hospital of Shandong University, Jinan, Shandong, China
| | - Haiting Mao
- Department of Clinical Laboratory, The Second Hospital of Shandong University, Jinan, Shandong, China
| |
Collapse
|
9
|
Maulik A, Bandopadhyay D, Singh M. A cytosine-patch sequence motif identified in the conserved region of lincRNA-p21 interacts with the KH3 domain of hnRNPK. Curr Res Struct Biol 2023; 5:100099. [PMID: 36941955 PMCID: PMC10023864 DOI: 10.1016/j.crstbi.2023.100099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Revised: 12/07/2022] [Accepted: 02/28/2023] [Indexed: 03/05/2023] Open
Abstract
Long Intergenic Non-coding RNAs (lincRNAs) are the largest class of long non-coding RNAs in eukaryotes, originating from the genome's intergenic regions. A ∼4 kb long lincRNA-p21 is derived from a transcription unit next to the p21/Cdkn1a gene locus. LincRNA-p21 plays regulatory roles in p53-dependent transcriptional and translational repression through its physical association with proteins such as hnRNPK and HuR. It is also involved in the aberrant gene expression in different cancers. In this study, we have carried out a bioinformatics-based gene analysis and annotation of lincRNA-p21 to show that it is highly conserved in primates and identified two conserved domains in its sequence at the 5' and 3' terminal regions. hnRNPK has previously been shown to interact specifically with the 5' conserved region of lincRNA-p21. hnRNPK is known to bind preferentially to the pyrimidine-rich (poly C) nucleotide sequences in RNAs. Interestingly, we observed a single occurrence of a cytosine-rich patch (C-patch) consisting of a CUCCCGC sequence in the 5' conserved region of human lincRNA-p21, making it a putative hnRNPK binding motif. Using NMR and ITC experiments, we showed that the single-stranded C-patch containing RNA sequence motif interacts specifically with the KH3 domain of hnRNPK.
Collapse
|
10
|
Yokoi S, Ito T, Sahashi K, Nakatochi M, Nakamura R, Tohnai G, Fujioka Y, Ishigaki S, Udagawa T, Izumi Y, Morita M, Kano O, Oda M, Sone T, Okano H, Atsuta N, Katsuno M, Okada Y, Sobue G. The SYNGAP1 3'UTR Variant in ALS Patients Causes Aberrant SYNGAP1 Splicing and Dendritic Spine Loss by Recruiting HNRNPK. J Neurosci 2022; 42:8881-8896. [PMID: 36261283 PMCID: PMC9698725 DOI: 10.1523/jneurosci.0455-22.2022] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 08/28/2022] [Accepted: 10/06/2022] [Indexed: 12/29/2022] Open
Abstract
Fused in sarcoma (FUS) is a pathogenic RNA-binding protein in amyotrophic lateral sclerosis (ALS). We previously reported that FUS stabilizes Synaptic Ras-GTPase activating protein 1 (Syngap1) mRNA at its 3' untranslated region (UTR) and maintains spine maturation. To elucidate the pathologic roles of this mechanism in ALS patients, we identified the SYNGAP1 3'UTR variant rs149438267 in seven (four males and three females) out of 807 ALS patients at the FUS binding site from a multicenter cohort in Japan. Human-induced pluripotent stem cell (hiPSC)-derived motor neurons with the SYNGAP1 variant showed aberrant splicing, increased isoform α1 levels, and decreased isoform γ levels, which caused dendritic spine loss. Moreover, the SYNGAP1 variant excessively recruited FUS and heterogeneous nuclear ribonucleoprotein K (HNRNPK), and antisense oligonucleotides (ASOs) blocking HNRNPK altered aberrant splicing and ameliorated dendritic spine loss. These data suggest that excessive recruitment of RNA-binding proteins, especially HNRNPK, as well as changes in SYNGAP1 isoforms, are crucial for spine formation in motor neurons.SIGNIFICANCE STATEMENT It is not yet known which RNAs cause the pathogenesis of amyotrophic lateral sclerosis (ALS). We previously reported that Fused in sarcoma (FUS), a pathogenic RNA-binding protein in ALS, stabilizes synaptic Ras-GTPase activating protein 1 (Syngap1) mRNA at its 3' untranslated region (UTR) and maintains dendritic spine maturation. To elucidate whether this mechanism is crucial for ALS, we identified the SYNGAP1 3'UTR variant rs149438267 at the FUS binding site. Human-induced pluripotent stem cell (hiPSC)-derived motor neurons with the SYNGAP1 variant showed aberrant splicing, which caused dendritic spine loss along with excessive recruitment of FUS and heterogeneous nuclear ribonucleoprotein K (HNRNPK). Our findings that dendritic spine loss is because of excess recruitment of RNA-binding proteins provide a basis for the future exploration of ALS-related RNA-binding proteins.
Collapse
Affiliation(s)
- Satoshi Yokoi
- Department of Neurology, Nagoya University Graduate School of Medicine, Nagoya 466-8550, Japan
| | - Takuji Ito
- Department of Neurology, Aichi Medical University School of Medicine, Aichi 480-1195, Japan
- Department of Neural iPSC Research, Institute for Medical Science of Aging, Aichi Medical University, Aichi 480-1195, Japan
| | - Kentaro Sahashi
- Department of Neurology, Nagoya University Graduate School of Medicine, Nagoya 466-8550, Japan
| | - Masahiro Nakatochi
- Public Health Informatics Unit, Department of Integrated Health Sciences, Nagoya University Graduate School of Medicine, Nagoya 461-8673, Japan
| | - Ryoichi Nakamura
- Department of Neurology, Nagoya University Graduate School of Medicine, Nagoya 466-8550, Japan
- Department of Neurology, Aichi Medical University School of Medicine, Aichi 480-1195, Japan
| | - Genki Tohnai
- Division of ALS Research, Aichi Medical University, Aichi 480-1195, Japan
| | - Yusuke Fujioka
- Department of Neurology, Nagoya University Graduate School of Medicine, Nagoya 466-8550, Japan
| | - Shinsuke Ishigaki
- Department of Neurology, Nagoya University Graduate School of Medicine, Nagoya 466-8550, Japan
- Research Division of Dementia and Neurodegenerative Disease, Nagoya University Graduate School of Medicine, Nagoya 466-8550, Japan
| | - Tsuyoshi Udagawa
- Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya 467-8603, Japan
| | - Yuishin Izumi
- Department of Neurology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima 770-8503, Japan
| | - Mitsuya Morita
- Division of Neurology, Department of Internal Medicine, Jichi Medical University, Shimotsuke 329-0498, Japan
| | - Osamu Kano
- Department of Neurology, Toho University Faculty of Medicine, Tokyo 143-8540, Japan
| | - Masaya Oda
- Department of Neurology, Vihara Hananosato Hospital, Miyoshi 728-0001, Japan
| | - Takefumi Sone
- Department of Physiology, Keio University School of Medicine, Tokyo 160-0016, Japan
| | - Hideyuki Okano
- Department of Physiology, Keio University School of Medicine, Tokyo 160-0016, Japan
| | - Naoki Atsuta
- Department of Neurology, Nagoya University Graduate School of Medicine, Nagoya 466-8550, Japan
- Department of Neurology, Aichi Medical University School of Medicine, Aichi 480-1195, Japan
| | - Masahisa Katsuno
- Department of Neurology, Nagoya University Graduate School of Medicine, Nagoya 466-8550, Japan
| | - Yohei Okada
- Department of Neurology, Aichi Medical University School of Medicine, Aichi 480-1195, Japan
- Department of Neural iPSC Research, Institute for Medical Science of Aging, Aichi Medical University, Aichi 480-1195, Japan
| | - Gen Sobue
- Research Division of Dementia and Neurodegenerative Disease, Nagoya University Graduate School of Medicine, Nagoya 466-8550, Japan
- Aichi Medical University, Aichi 480-1195, Japan
| |
Collapse
|
11
|
Lee WJ, Ji H, Jeong SD, Pandey PR, Gorospe M, Kim HH. LINC00162 regulates cell proliferation and apoptosis by sponging PAQR4-targeting miR-485-5p. J Cell Physiol 2022; 237:2943-2960. [PMID: 35491694 PMCID: PMC9846112 DOI: 10.1002/jcp.30758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Revised: 03/30/2022] [Accepted: 04/06/2022] [Indexed: 01/21/2023]
Abstract
Growing evidence indicates that long intergenic noncoding RNAs play an important role in cancer progression by affecting gene regulation at the transcriptional and posttranscriptional levels. Recent studies have shown that long intergenic noncoding RNA functions as a competitive endogenous RNA, which can interact with and mitigate the function of microRNA. In this study, we investigated the molecular mechanism by which LINC00162 regulates cell proliferation and apoptotic cell death. By analyzing RNA sequencing data, LINC00162 was identified to be a target of heterogeneous nuclear ribonucleoprotein K (hnRNPK). HnRNPK positively regulated LINC00162 expression through p38 mitogen-activated protein kinase. Lowering the level of either hnRNPK or LINC00162 decreased proliferation and colony formation while it increased apoptotic cell death. Small RNA sequencing followed by the antisense oligonucleotide pulldown, revealed that LINC00162 interacts directly with miR-485-5p which exhibited tumor-suppressing effects by suppressing cell proliferation and colony formation, and increasing apoptotic cell death. Through the bioinformatic approaches, progestin and adipoQ receptor 4 (PAQR4) was selected as a common target of LINC00162 and miR-485-5p. miR-485-5p decreased the expression of PAQR4 by directly binding to the 3'-untranslated region of PAQR4 messenger RNA. Knockdown of hnRNPK and LINC00162 increased the level of functional miR-485-5p, indicating that LINC00162 may compete for miR-485-5p, thereby derepressing PAQR4 expression. Overexpression of either hnRNPK or LINC00162, or inhibition of miR-485-5p, protected cells against etoposide-induced apoptotic death. Our findings demonstrate that a regulatory paradigm implicating hnRNPK, LINC00162, miR-485-5p, and PAQR4 plays an important role in cell proliferation and apoptosis, and is a promising target for cancer therapeutics.
Collapse
Affiliation(s)
- Woo Joo Lee
- Department of Health Sciences and Technology, Samsung Advanced Institute for Health Sciences and Technology, Sungkyunkwan University, Seoul 06351, Republic of Korea
| | - Haein Ji
- Department of Health Sciences and Technology, Samsung Advanced Institute for Health Sciences and Technology, Sungkyunkwan University, Seoul 06351, Republic of Korea
| | - Seong Dong Jeong
- Department of Health Sciences and Technology, Samsung Advanced Institute for Health Sciences and Technology, Sungkyunkwan University, Seoul 06351, Republic of Korea,Department of Biopharmaceutical Convergence, Sungkyunkwan University, Seoul 06351, Republic of Korea
| | - Poonam R Pandey
- Laboratory of Genetics and Genomics, National Institute on Aging Intramural Research Program, National Institutes of Health, Baltimore, MD 21224, USA
| | - Myriam Gorospe
- Laboratory of Genetics and Genomics, National Institute on Aging Intramural Research Program, National Institutes of Health, Baltimore, MD 21224, USA
| | - Hyeon Ho Kim
- Department of Health Sciences and Technology, Samsung Advanced Institute for Health Sciences and Technology, Sungkyunkwan University, Seoul 06351, Republic of Korea,Research Institute for Future Medicine, Samsung Medical Center, Seoul 06351, Republic of Korea,Correspondence: Department of Health Sciences and Technology, Samsung Advanced Institute for Health Sciences and Technology, Sungkyunkwan University, 81 Irwon-ro, Gangnam-gu, Seoul 06351, Republic of Korea. Phone: +82-2-3410-1039; Fax: +82-2-3410-0534;
| |
Collapse
|
12
|
Pan X, Liu S, Liu L, Zhang X, Yao H, Tan B. Case Report: Exome and RNA Sequencing Identify a Novel de novo Missense Variant in HNRNPK in a Chinese Patient With Au-Kline Syndrome. Front Genet 2022; 13:853028. [PMID: 35422839 PMCID: PMC9001983 DOI: 10.3389/fgene.2022.853028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Accepted: 03/14/2022] [Indexed: 02/05/2023] Open
Abstract
Au-Kline syndrome is a severe multisystemic syndrome characterized by several congenital defects, including intellectual disability. Loss-of-function and missense variants in the HNRNPK gene are associated with a range of dysmorphic features. This report describes an eleven-year-old Chinese boy with intellectual disability and developmental delays. Family-based whole-exome and Sanger sequencing identified a de novo missense variant in HNRNPK (NM_002140.3: c.143T > A, p. Leu48Val). In silico analysis predicted that this variant would be damaged in a highly conserved residue in the K homology 1 (KH1) domain. Bioinformatic analysis showed that the affinity change (ΔΔG) caused by this variant was -0.033 kcal/mol, indicating that it would have reduced affinity for RNA binding. Transcript analysis of the peripheral blood from this case found 42 aberrantly expressed and 86 aberrantly spliced genes (p-value <0.01). Functional enrichment analysis confirmed that the biological functions of these genes, including protein binding and transcriptional regulation, are associated with HNRNPK. In summary, this study identifies the first Chinese patient with a novel de novo heterozygous HNRNPK gene variant that contributes to Au-Kline syndrome and expands current knowledge of the clinical spectrum of HNRNPK variants.
Collapse
Affiliation(s)
- Xin Pan
- Department of Gynecology and Obstetrics, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Sihan Liu
- Institute of Rare Diseases, West China Hospital of Sichuan University, Chengdu, China
| | - Li Liu
- Department of Gynecology and Obstetrics, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Xu Zhang
- Department of Gynecology and Obstetrics, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Hong Yao
- Department of Gynecology and Obstetrics, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Bo Tan
- Department of Gynecology and Obstetrics, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| |
Collapse
|
13
|
Zhang J, Liu X, Yin C, Zong S. hnRNPK/Beclin1 signaling regulates autophagy to promote imatinib resistance in Philadelphia chromosome-positive acute lymphoblastic leukemia cells. Exp Hematol 2022; 108:46-54. [PMID: 35038545 DOI: 10.1016/j.exphem.2022.01.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [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: 09/17/2021] [Revised: 12/28/2021] [Accepted: 01/09/2022] [Indexed: 11/20/2022]
Abstract
BACKGROUND This study sought to clarify the role of hnRNPK as a regulator of imatinib resistance in Philadelphia chromosome-positive acute lymphoblastic leukemia (Ph+ ALL). METHODS The expression of hnRNPK was assessed in Ph+ ALL leukemia cells in vitro and in vivo, while imatinib susceptibility was assessed via CCK-8 assay. In cells in which hnRNPK levels had or had not been modulated, LC3Ⅰ/Ⅱ and mTOR/p-ERK/Beclin1levels were assessed via western blotting, while electron microscopy was used to evaluate autophagic vacuole formation. Interactions between hnRNPK and Beclin1 were assessed through an RNA binding protein immunoprecipitation assay. RESULTS Imatinib-resistant Ph+ ALL cell lines and patient bone marrow samples exhibited significant hnRNPK overexpression. The knockdown of hnRNPK increased the imatinib sensitivity of these tumor cells and decreased in vivo tumor burden in a xenograft model system as evidenced by a reduction in tumor volume. Levels of LC3Ⅰ/Ⅱand Beclin1, but not p-ERK and mTOR, were consistent with the regulatory activity of hnRNPK.Electronmicroscopy revealed that imatinib-resistant cells harbored significantly more autophagic vacuoles relative to wild-type cells, while hnRNPK knockdown reduced the number of these vacuoles. In an RNA binding protein immunoprecipitation assay, anti-hnRNPK was able to precipitate the Beclin1 mRNA. CONCLUSIONS These results suggest that the hnRNPK/Beclin1 signaling pathway may play a role in shaping imatinib resistance in Ph+ ALL cells.
Collapse
Affiliation(s)
- JinFang Zhang
- Department of Paediatric Hematology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong Province, China.
| | - XiaoLi Liu
- Department of Hematology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong Province, China
| | - ChangXin Yin
- Department of Hematology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong Province, China
| | - Sa Zong
- Department of Paediatric Hematology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong Province, China
| |
Collapse
|
14
|
Zhang M, Wu J, Zhong W, Zhao Z, He W. DNA-methylation-induced silencing of DIO3OS drives non-small cell lung cancer progression via activating hnRNPK-MYC-CDC25A axis. Mol Ther Oncolytics 2021; 23:205-19. [PMID: 34761103 DOI: 10.1016/j.omto.2021.09.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Accepted: 09/24/2021] [Indexed: 11/22/2022]
Abstract
DNA methylation is a class of epigenetic modification manner, which is responsible for the inactivation of various tumor suppressors. Recently, long non-coding RNAs (lncRNAs) were revealed to be implicated in a variety of malignancies, including non-small cell lung cancer (NSCLC). However, the contributions of lncRNAs to DNA-methylation-induced oncogenic effects in NSCLC remain largely unknown. In this study, we identified a DNA-methylation-repressed lncRNA DIO3 opposite strand upstream RNA (DIO3OS) in NSCLC. DIO3OS is downregulated in NSCLC, and its low expression is related to poor prognosis. Ectopic expression of DIO3OS repressed NSCLC cell growth and motility and promoted NSCLC cell apoptosis in vitro. DIO3OS also repressed NSCLC tumorigenesis and metastasis in vivo. DIO3OS knockdown exhibited opposite biological effects. DIO3OS competitively bound heterogeneous nuclear ribonucleoprotein K (hnRNPK), repressed the binding of hnRNPK to MYC DNA and MYC mRNA, reduced the promoting roles of hnRNPK on MYC transcription and translation, led to the repression of MYC transcription and translation, and therefore remarkably decreased the expression of MYC and CDC25A, a downstream target of MYC. Additionally, depletion of hnRNPK blocked the tumor-suppressive roles of DIO3OS in NSCLC. In conclusion, these findings identified DIO3OS as an important protective factor against NSCLC via modulating hnRNPK-MYC-CDC25A axis.
Collapse
|
15
|
Natarajan K, Sundaramoorthy A, Shanmugam N. HnRNPK and lysine specific histone demethylase-1 regulates IP-10 mRNA stability in monocytes. Eur J Pharmacol 2021; 920:174683. [PMID: 34914972 DOI: 10.1016/j.ejphar.2021.174683] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 11/26/2021] [Accepted: 12/02/2021] [Indexed: 12/27/2022]
Abstract
Altered mRNA metabolism is a feature of many inflammatory diseases. Post transcriptional regulation of interferon-γ-inducible protein (IP)-10 has been uncharacterized in diabetes conditions. RNA-affinity capture method and RNA immuno-precipitation revealed S100b treatment increased the binding of heterogeneous nuclear ribonucleoprotein (hnRNP)K to the IP-10 3'UTR and increased IP-10 mRNA accumulation. Luciferase activity assay using reporter plasmids showed involvement of IP-10 3'UTR. Knocking down of hnRNPK destabilized S100b induced IP-10 mRNA accumulation. S100b promoted the translocation of hnRNPK from nucleus to the cytoplasm and this was confirmed by phosphomimetic S284/353D mutant and non-phosphatable S284/353A hnRNPK mutant. S100b treatment demethylates hnRNPK at Lys219 by Lysine Specific Demethylase (LSD)-1. HnRNPKK219I, a demethylation defective mutant increased IP-10 mRNA stability. Apparently, triple mutant hnRNPKK219I/S284D/353D promoted IP-10 mRNA stability. Interestingly, knocking down LSD-1 abolished S100b induced IP-10 mRNA accumulation. These observations show for the first time that IP-10 mRNA stability is dynamically regulated by Lysine demethylation of hnRNPK by LSD-1. These results indicate that hnRNPK plays an important role in IP-10 mRNA stability induced by S100b which could exacerbate monocyte activation, relevant to the pathogenesis of diabetic complications like atherosclerosis.
Collapse
Affiliation(s)
- Kartiga Natarajan
- Diabetes and Cardiovascular Research Laboratory, Department of Biomedical Science, Bharathidasan University, Tiruchirappalli, 620 024, Tamilnadu, India
| | - Arun Sundaramoorthy
- Diabetes and Cardiovascular Research Laboratory, Department of Biomedical Science, Bharathidasan University, Tiruchirappalli, 620 024, Tamilnadu, India.
| | - Narkunaraja Shanmugam
- Diabetes and Cardiovascular Research Laboratory, Department of Biomedical Science, Bharathidasan University, Tiruchirappalli, 620 024, Tamilnadu, India.
| |
Collapse
|
16
|
Song S, He X, Wang J, Wang R, Wang L, Zhao W, Wang Y, Zhang Y, Yu Z, Miao D, Xue Y. ELF3-AS1 contributes to gastric cancer progression by binding to hnRNPK and induces thrombocytosis in peripheral blood. Cancer Sci 2021; 112:4553-4569. [PMID: 34418240 PMCID: PMC8586678 DOI: 10.1111/cas.15104] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 07/28/2021] [Accepted: 08/06/2021] [Indexed: 01/18/2023] Open
Abstract
Numerous studies have reported that a variety of long noncoding RNAs (lncRNAs) can promote the proliferation, invasion, and migration of different tumor cells. However, different lncRNAs regulate cell functions in various forms, and the exact mechanisms are not clear. Here, we investigated the effect of the lncRNA ELF3-AS1 on gastric cancer (GC) cell function and explored the exact mechanism. Quantitative real-time polymerase chain reaction was used to detect the expression of ELF3-AS1 in GC tissues and adjacent nontumor tissues. Knockdown and overexpression of ELF3-AS1 was used to detect the effect of ELF3-AS1 on cell function. Potential downstream target genes were identified using RNA transcriptome sequencing, while RNA immunoprecipitation, chromatin immunoprecipitation, and Western blotting were performed to explore the tumor promotion mechanisms of ELF3-AS1. We observed that ELF3-AS1 was highly expressed in GC tissues, and high ELF3-AS1 expression predicted poor prognosis. The knockdown of ELF3-AS1 significantly inhibited cell proliferation, migration, and epithelial-mesenchymal transition and promoted apoptosis. Mechanistic investigations revealed that ELF3-AS1 may regulate the downstream target gene, C-C motif chemokine 20, by binding with the RNA-binding protein hnRNPK. Additionally, we found that high ELF3-AS1 expression was associated with thrombocytosis. Interleukin-6 and thrombopoietin may be involved in ELF3-AS1-induced paraneoplastic thrombocytosis. Together, our results demonstrate that aberrantly expressed ELF3-AS1 in GC may play important roles in oncogenesis and progression and is expected to become a new target for the diagnosis and treatment of GC.
Collapse
Affiliation(s)
- Shubin Song
- Department of gastrointestinal surgeryHarbin Medical University Cancer HospitalHarbinChina
- Department of Breast SurgeryShandong Cancer Hospital and InstituteShandong First Medical University and Shandong Academy of Medical SciencesJinanChina
| | - Xuezhi He
- Department of Nutrition and Food HygieneSchool of Public HealthNanjing Medical UniversityNanjingChina
| | - Jing Wang
- Department of Anatomy, Histology and EmbryologyState Key Laboratory of Reproductive MedicineThe Research Center for Bone and Stem CellsNanjing Medical UniversityNanjingChina
| | - Rong Wang
- Department of Anatomy, Histology and EmbryologyThe Research Center for Bone and Stem CellsNanjing Medical UniversityNanjingChina
| | - Leilei Wang
- Department of Breast SurgeryShandong Cancer Hospital and InstituteShandong First Medical University and Shandong Academy of Medical SciencesJinanChina
| | - Wei Zhao
- Department of Breast SurgeryShandong Cancer Hospital and InstituteShandong First Medical University and Shandong Academy of Medical SciencesJinanChina
| | - Yimin Wang
- Department of gastrointestinal surgeryHarbin Medical University Cancer HospitalHarbinChina
| | - Yongle Zhang
- Department of gastrointestinal surgeryHarbin Medical University Cancer HospitalHarbinChina
| | - Zhiyong Yu
- Department of Breast SurgeryShandong Cancer Hospital and InstituteShandong First Medical University and Shandong Academy of Medical SciencesJinanChina
| | - Dengshun Miao
- The Research Center for AgingFriendship Affiliated Plastic Surgery Hospital of Nanjing Medical UniversityNanjingChina
| | - Yingwei Xue
- Department of gastrointestinal surgeryHarbin Medical University Cancer HospitalHarbinChina
| |
Collapse
|
17
|
Chen CC, Yang JH, Fu SL, Lin WJ, Lin CH. Arginine Methylation of hnRNPK Inhibits the DDX3-hnRNPK Interaction to Play an Anti-Apoptosis Role in Osteosarcoma Cells. Int J Mol Sci 2021; 22:9764. [PMID: 34575922 DOI: 10.3390/ijms22189764] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 09/03/2021] [Accepted: 09/06/2021] [Indexed: 11/16/2022] Open
Abstract
Heterogeneous nuclear ribonucleoprotein K (hnRNPK) is an RNA/DNA binding protein involved in diverse cell processes; it is also a p53 coregulator that initiates apoptosis under DNA damage conditions. However, the upregulation of hnRNPK is correlated with cancer transformation, progression, and migration, whereas the regulatory role of hnRNPK in cancer malignancy remains unclear. We previously showed that arginine methylation of hnRNPK attenuated the apoptosis of U2OS osteosarcoma cells under DNA damage conditions, whereas the replacement of endogenous hnRNPK with a methylation-defective mutant inversely enhanced apoptosis. The present study further revealed that an RNA helicase, DDX3, whose C-terminus preferentially binds to the unmethylated hnRNPK and could promote such apoptotic enhancement. Moreover, C-terminus-truncated DDX3 induced significantly less apoptosis than full-length DDX3. Notably, we also identified a small molecule that docks at the ATP-binding site of DDX3, promotes the DDX3-hnRNPK interaction, and induces further apoptosis. Overall, we have shown that the arginine methylation of hnRNPK suppresses the apoptosis of U2OS cells via interfering with DDX3-hnRNPK interaction. On the other hand, DDX3-hnRNPK interaction with a proapoptotic role may serve as a target for promoting apoptosis in osteosarcoma cells.
Collapse
|
18
|
Peng C, Tan Y, Yang P, Jin K, Zhang C, Peng W, Wang L, Zhou J, Chen R, Wang T, Jin C, Ji J, Feng Y, Tang J, Sun Y. Circ-GALNT16 restrains colorectal cancer progression by enhancing the SUMOylation of hnRNPK. J Exp Clin Cancer Res 2021; 40:272. [PMID: 34452628 PMCID: PMC8400830 DOI: 10.1186/s13046-021-02074-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [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: 05/07/2021] [Accepted: 08/14/2021] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND Recent studies have investigated the role of circular RNAs (circRNAs) as significant regulatory factors in multiple cancer progression. Nevertheless, the biological functions of circRNAs and the underlying mechanisms by which they regulate colorectal cancer (CRC) progression remain unclear. METHODS A novel circRNA (circ-GALNT16) was identified by microarray and qRT-PCR. A series of in vitro and in vivo phenotype experiments were performed to investigate the role of circ-GALNT16 in CRC. The FISH, RNA pulldown assay, RIP assay, RNA sequencing, coimmunoprecipitation, and ChIP were performed to investigate the molecular mechanisms of circ-GALNT16 in CRC progression. RESULTS Circ-GALNT16 was downregulated in CRC and was negatively correlated with poor prognosis. Circ-GALNT16 suppressed the proliferation and metastatic ability of CRC cells in vitro and in vivo. Mechanistically, circ-GALNT16 could bind to the KH3 domain of heterogeneous nuclear ribonucleoprotein K (hnRNPK), which promoted the SUMOylation of hnRNPK. Additionally, circ-GALNT16 could enhance the formation of the hnRNPK-p53 complex by facilitating the SUMOylation of hnRNPK. RNA sequencing assay identified serpin family E member 1 as the target gene of circ-GALNT16 at the transcriptional level. Rescue assays revealed that circ-GALNT16 regulated the expression of Serpine1 by inhibiting the deSUMOylation of hnRNPK mediated by SUMO-specific peptidase 2 and then regulating the sequence-specific DNA binding ability of the hnRNPK-p53 transcriptional complex. CONCLUSIONS Circ-GALNT16 suppressed CRC progression by inhibiting Serpine1 expression through regulating the sequence-specific DNA binding ability of the SENP2-mediated hnRNPK-p53 transcriptional complex and might function as a biomarker and therapeutic target for CRC.
Collapse
Affiliation(s)
- Chaofan Peng
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Jiangsu, 210029, Nanjing, People's Republic of China
- The First School of Clinical Medicine, Nanjing Medical University, Nanjing, China
- Nanjing Medical University, Nanjing, China
| | - Yuqian Tan
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Jiangsu, 210029, Nanjing, People's Republic of China
- The First School of Clinical Medicine, Nanjing Medical University, Nanjing, China
- Nanjing Medical University, Nanjing, China
| | - Peng Yang
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Jiangsu, 210029, Nanjing, People's Republic of China
- The First School of Clinical Medicine, Nanjing Medical University, Nanjing, China
- Nanjing Medical University, Nanjing, China
| | - Kangpeng Jin
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Jiangsu, 210029, Nanjing, People's Republic of China
- The First School of Clinical Medicine, Nanjing Medical University, Nanjing, China
- Nanjing Medical University, Nanjing, China
| | - Chuan Zhang
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Jiangsu, 210029, Nanjing, People's Republic of China
- The First School of Clinical Medicine, Nanjing Medical University, Nanjing, China
- Nanjing Medical University, Nanjing, China
| | - Wen Peng
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Jiangsu, 210029, Nanjing, People's Republic of China
- The First School of Clinical Medicine, Nanjing Medical University, Nanjing, China
- Nanjing Medical University, Nanjing, China
| | - Lu Wang
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Jiangsu, 210029, Nanjing, People's Republic of China
- The First School of Clinical Medicine, Nanjing Medical University, Nanjing, China
- Nanjing Medical University, Nanjing, China
| | - Jiahui Zhou
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Jiangsu, 210029, Nanjing, People's Republic of China
- The First School of Clinical Medicine, Nanjing Medical University, Nanjing, China
- Nanjing Medical University, Nanjing, China
| | - Ranran Chen
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Jiangsu, 210029, Nanjing, People's Republic of China
- The First School of Clinical Medicine, Nanjing Medical University, Nanjing, China
- Nanjing Medical University, Nanjing, China
| | - Tuo Wang
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Jiangsu, 210029, Nanjing, People's Republic of China
- The First School of Clinical Medicine, Nanjing Medical University, Nanjing, China
- Nanjing Medical University, Nanjing, China
| | - Chi Jin
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Jiangsu, 210029, Nanjing, People's Republic of China
- The First School of Clinical Medicine, Nanjing Medical University, Nanjing, China
- Nanjing Medical University, Nanjing, China
| | - Jiangzhou Ji
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Jiangsu, 210029, Nanjing, People's Republic of China
- The First School of Clinical Medicine, Nanjing Medical University, Nanjing, China
- Nanjing Medical University, Nanjing, China
| | - Yifei Feng
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Jiangsu, 210029, Nanjing, People's Republic of China
- The First School of Clinical Medicine, Nanjing Medical University, Nanjing, China
- Nanjing Medical University, Nanjing, China
| | - Junwei Tang
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Jiangsu, 210029, Nanjing, People's Republic of China.
- The First School of Clinical Medicine, Nanjing Medical University, Nanjing, China.
- Nanjing Medical University, Nanjing, China.
| | - Yueming Sun
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Jiangsu, 210029, Nanjing, People's Republic of China.
- The First School of Clinical Medicine, Nanjing Medical University, Nanjing, China.
- Nanjing Medical University, Nanjing, China.
| |
Collapse
|
19
|
Feng J, Li H, Li J, Meng P, Wang L, Liu C, Zhao S, Sun W, Zhang Y. hnRNPK knockdown alleviates NLRP3 inflammasome priming by repressing FLIP expression in Raw264.7 macrophages. Redox Rep 2021; 25:104-111. [PMID: 33269646 PMCID: PMC7717877 DOI: 10.1080/13510002.2020.1857157] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Objectives: Inflammation is an important predisposing and progressive factor in chronic kidney disease (CKD). Heterogeneous nuclear ribonucleoprotein K (hnRNPK) is associated with many fundamental cellular processes, but in chronic inflammatory pathologies remains unclear. Methods: An in vitro peripheral inflammation model was established using lipopolysaccharide (LPS)-stimulated mouse RAW264.7 macrophages, followed by inflammasome activation by ATP treatment. Knockdown of hnRNPK by sihnRNPK and FLICE-like inhibitory protein (FLIP) by siFLIP transfection were achieved in Raw264.7 macrophages. ELISA was used to determine the expression of IL-1β, IL-18 and TNF-α. Real time PCR was applied to detect the mRNA levels of hnRNPK, NOD-like receptors family pyrin domain-containing 3 (NLRP3), FLIP, Caspase-1, IL-1β and IL-18. Western blot and immunofluorescence were performed to detect relevant protein expressions. Co-immunoprecipitation (Co-IP) was used to assess the interaction of hnRNPK with FLIP. Results: Results showed that LPS plus ATP activated NLRP3 inflammasome, which evidenced by the up-regulation of TNF-α, IL-1β and IL-18. Notably, hnRNPK and FLIP were significantly up-regulated in activated NLRP3 inflammasome of macrophages. HnRNPK or FLIP knockdown significantly suppressed the activation of NLRP3 inflammasome, as reflected by down-regulation of Caspase-1, IL-1β and IL-18. Importantly, hnRNPK could directly bind to FLIP in activated NLRP3 inflammasome. Discussion: Our findings suggest that hnRNPK could promote the activation of NLRP3 inflammasome by directly binding FLIP, which might provide potential new therapeutic targets for CKD.
Collapse
Affiliation(s)
- Junxia Feng
- The Central Laboratory, Affiliated Huadu Hospital, Southern Medical University, Guangzhou, People's Republic of China
| | - Hongyan Li
- Department of nephrology, Affiliated Huadu Hospital, Southern Medical University, Guangzhou, People's Republic of China
| | - Jingchun Li
- The Central Laboratory, Affiliated Huadu Hospital, Southern Medical University, Guangzhou, People's Republic of China
| | - Ping Meng
- The Central Laboratory, Affiliated Huadu Hospital, Southern Medical University, Guangzhou, People's Republic of China
| | - Lina Wang
- Department of nephrology, Affiliated Huadu Hospital, Southern Medical University, Guangzhou, People's Republic of China
| | - Chunli Liu
- The Central Laboratory, Affiliated Huadu Hospital, Southern Medical University, Guangzhou, People's Republic of China
| | - Shili Zhao
- Department of nephrology, Affiliated Huadu Hospital, Southern Medical University, Guangzhou, People's Republic of China
| | - Wei Sun
- The Central Laboratory, Affiliated Huadu Hospital, Southern Medical University, Guangzhou, People's Republic of China
| | - Yunfang Zhang
- Department of nephrology, Affiliated Huadu Hospital, Southern Medical University, Guangzhou, People's Republic of China
| |
Collapse
|
20
|
Lubelsky Y, Zuckerman B, Ulitsky I. High-resolution mapping of function and protein binding in an RNA nuclear enrichment sequence. EMBO J 2021; 40:e106357. [PMID: 33938020 PMCID: PMC8204871 DOI: 10.15252/embj.2020106357] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [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: 07/27/2020] [Revised: 03/14/2021] [Accepted: 03/24/2021] [Indexed: 01/04/2023] Open
Abstract
The functions of long RNAs, including mRNAs and long noncoding RNAs (lncRNAs), critically depend on their subcellular localization. The identity of the sequences that dictate subcellular localization and their high-resolution anatomy remain largely unknown. We used a suite of massively parallel RNA assays and libraries containing thousands of sequence variants to pinpoint the functional features within the SIRLOIN element, which dictates nuclear enrichment through hnRNPK recruitment. In addition, we profiled the endogenous SIRLOIN RNA-nucleoprotein complex and identified the nuclear RNA-binding proteins SLTM and SNRNP70 as novel SIRLOIN binders. Taken together, using massively parallel assays, we identified the features that dictate binding of hnRNPK, SLTM, and SNRNP70 to SIRLOIN and found that these factors are jointly required for SIRLOIN activity. Our study thus provides a roadmap for high-throughput dissection of functional sequence elements in long RNAs.
Collapse
Affiliation(s)
- Yoav Lubelsky
- Department of Biological RegulationWeizmann Institute of ScienceRehovotIsrael
| | - Binyamin Zuckerman
- Department of Biological RegulationWeizmann Institute of ScienceRehovotIsrael
| | - Igor Ulitsky
- Department of Biological RegulationWeizmann Institute of ScienceRehovotIsrael
| |
Collapse
|
21
|
Robinson H, Ruelcke JE, Lewis A, Bond CS, Fox AH, Bharti V, Wani S, Cloonan N, Lai A, Margolin D, Li L, Salomon C, Richards RS, Farrell A, Gardiner RA, Parton RG, Cristino AS, Hill MM. Caveolin-1-driven membrane remodelling regulates hnRNPK-mediated exosomal microRNA sorting in cancer. Clin Transl Med 2021; 11:e381. [PMID: 33931969 PMCID: PMC8031663 DOI: 10.1002/ctm2.381] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 03/15/2021] [Accepted: 03/17/2021] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Caveolae proteins play diverse roles in cancer development and progression. In prostate cancer, non-caveolar caveolin-1 (CAV1) promotes metastasis, while CAVIN1 attenuates CAV1-induced metastasis. Here, we unveil a novel mechanism linking CAV1 to selective loading of exosomes with metastasis-promoting microRNAs. RESULTS We identify hnRNPK as a CAV1-regulated microRNA binding protein. In the absence of CAVIN1, non-caveolar CAV1 drives localisation of hnRPNK to multi-vesicular bodies (MVBs), recruiting AsUGnA motif-containing miRNAs and causing their release within exosomes. This process is dependent on the lipid environment of membranes as shown by cholesterol depletion using methyl-β-cyclodextrin or by treatment with n-3 polyunsaturated fatty acids. Consistent with a role in bone metastasis, knockdown of hnRNPK in prostate cancer PC3 cells abolished the ability of PC3 extracellular vesicles (EV) to induce osteoclastogenesis, and biofluid EV hnRNPK is elevated in metastatic prostate and colorectal cancer. CONCLUSIONS Taken together, these results support a novel pan-cancer mechanism for CAV1-driven exosomal release of hnRNPK and associated miRNA in metastasis, which is modulated by the membrane lipid environment.
Collapse
Affiliation(s)
- Harley Robinson
- The University of Queensland Diamantina InstituteThe University of QueenslandWoolloongabbaQueenslandAustralia
- QIMR Berghofer Medical Research InstituteBrisbaneQueenslandAustralia
| | - Jayde E. Ruelcke
- The University of Queensland Diamantina InstituteThe University of QueenslandWoolloongabbaQueenslandAustralia
| | - Amanda Lewis
- School of Molecular SciencesThe University of Western AustraliaCrawleyWAAustralia
| | - Charles S. Bond
- School of Molecular SciencesThe University of Western AustraliaCrawleyWAAustralia
| | - Archa H. Fox
- School of Molecular SciencesThe University of Western AustraliaCrawleyWAAustralia
- School of Human SciencesThe University of Western AustraliaCrawleyWAAustralia
- The Harry Perkins Institute of Medical ResearchQEII Medical CentreNedlandsWAAustralia
| | - Vandhana Bharti
- QIMR Berghofer Medical Research InstituteBrisbaneQueenslandAustralia
| | - Shivangi Wani
- QIMR Berghofer Medical Research InstituteBrisbaneQueenslandAustralia
| | - Nicole Cloonan
- QIMR Berghofer Medical Research InstituteBrisbaneQueenslandAustralia
| | - Andrew Lai
- University of Queensland Centre for Clinical Research, Royal Brisbane and Women's HospitalThe University of QueenslandBrisbaneQueenslandAustralia
| | - David Margolin
- Maternal‐Fetal Medicine, Department of Obstetrics and GynecologyOchsner Clinic FoundationNew OrleansUSA
| | - Li Li
- Maternal‐Fetal Medicine, Department of Obstetrics and GynecologyOchsner Clinic FoundationNew OrleansUSA
| | - Carlos Salomon
- University of Queensland Centre for Clinical Research, Royal Brisbane and Women's HospitalThe University of QueenslandBrisbaneQueenslandAustralia
- Maternal‐Fetal Medicine, Department of Obstetrics and GynecologyOchsner Clinic FoundationNew OrleansUSA
- Department of Clinical Biochemistry and Immunology, Faculty of PharmacyUniversity of ConcepciónConcepciónChile
| | - Renée S. Richards
- QIMR Berghofer Medical Research InstituteBrisbaneQueenslandAustralia
| | - Aine Farrell
- University of Queensland Centre for Clinical Research, Royal Brisbane and Women's HospitalThe University of QueenslandBrisbaneQueenslandAustralia
| | - Robert A. Gardiner
- University of Queensland Centre for Clinical Research, Royal Brisbane and Women's HospitalThe University of QueenslandBrisbaneQueenslandAustralia
| | - Robert G. Parton
- Institute for Molecular BioscienceThe University of QueenslandSt LuciaQueenslandAustralia
- Centre for Microscopy and MicroanalysisThe University of QueenslandSt LuciaQueenslandAustralia
| | - Alexandre S. Cristino
- The University of Queensland Diamantina InstituteThe University of QueenslandWoolloongabbaQueenslandAustralia
- Griffith Institute for Drug DiscoveryGriffith UniversityBrisbaneQueenslandAustralia
| | - Michelle M. Hill
- The University of Queensland Diamantina InstituteThe University of QueenslandWoolloongabbaQueenslandAustralia
- QIMR Berghofer Medical Research InstituteBrisbaneQueenslandAustralia
| |
Collapse
|
22
|
Iwabuchi E, Miki Y, Suzuki T, Hirakawa H, Ishida T, Sasano H. Heterogeneous Nuclear Ribonucleoprotein K Is Involved in the Estrogen-Signaling Pathway in Breast Cancer. Int J Mol Sci 2021; 22:ijms22052581. [PMID: 33806648 PMCID: PMC7962001 DOI: 10.3390/ijms22052581] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2020] [Revised: 02/24/2021] [Accepted: 03/01/2021] [Indexed: 01/22/2023] Open
Abstract
Heterogeneous nuclear ribonucleoprotein K (hnRNPK) transcripts are abundant in estrogen receptor (ER)- or progesterone receptor (PR)-positive breast cancer. However, the biological functions of hnRNPK in the ER-mediated signaling pathway have remained largely unknown. Therefore, this study analyzes the functions of hnRNPK expression in the ER-mediated signaling pathway in breast cancer. We initially evaluated hnRNPK expression upon treatment with estradiol (E2) and ICI 182,780 in the ERα-positive breast carcinoma cell line MCF-7. The results revealed that E2 increased hnRNPK; however, hnRNPK expression was decreased with ICI 182,780 treatment, indicating estrogen dependency. We further evaluated the effects of hnRNPK knockdown in the ER-mediated signaling pathway in MCF-7 cells using small interfering RNAs. The results revealed that hnRNPK knockdown decreased ERα expression and ERα target gene pS2 by E2 treatment. As hnRNPK interacts with several other proteins, we explored the interaction between hnRNPK and ERα, which was demonstrated using immunoprecipitation and proximity ligation assay. Subsequently, we immunolocalized hnRNPK in patients with breast cancer, which revealed that hnRNPK immunoreactivity was significantly higher in ERα-positive carcinoma cells and significantly lower in Ki67-positive or proliferative carcinoma cells. These results indicated that hnRNPK directly interacted with ERα and was involved in the ER-mediated signaling pathway in breast carcinoma. Furthermore, hnRNPK expression could be an additional target of endocrine therapy in patients with ERα-positive breast cancer.
Collapse
Affiliation(s)
- Erina Iwabuchi
- Department of Pathology, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan;
| | - Yasuhiro Miki
- Department of Disaster Obstetrics and Gynecology, International Research Institute of Disaster Science (IRIDes), Tohoku University, Sendai 980-8575, Japan;
| | - Takashi Suzuki
- Department of Pathology and Histotechnology, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan;
| | - Hisashi Hirakawa
- Department of Surgery, Tohoku Kosai Hospital, Sendai 980-0803, Japan;
| | - Takanori Ishida
- Department of Breast and Endocrine Surgical Oncology, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan;
| | - Hironobu Sasano
- Department of Pathology, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan;
- Correspondence: ; Tel.: +81-22-717-8050
| |
Collapse
|
23
|
Haskell D, Zinovyeva A. KH domain containing RNA-binding proteins coordinate with microRNAs to regulate Caenorhabditis elegans development. G3 (Bethesda) 2021; 11:6114466. [PMID: 33585875 PMCID: PMC8022929 DOI: 10.1093/g3journal/jkab013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Accepted: 12/23/2020] [Indexed: 11/13/2022]
Abstract
MicroRNAs (miRNAs) and RNA-binding proteins (RBPs) regulate gene expression at the post-transcriptional level, but the extent to which these key regulators of gene expression coordinate their activities and the precise mechanisms of this coordination are not well understood. RBPs often have recognizable RNA binding domains that correlate with specific protein function. Recently, several RBPs containing K homology (KH) RNA binding domains were shown to work with miRNAs to regulate gene expression, raising the possibility that KH domains may be important for coordinating with miRNA pathways in gene expression regulation. To ascertain whether additional KH domain proteins functionally interact with miRNAs during Caenorhabditis elegans development, we knocked down twenty-four genes encoding KH-domain proteins in several miRNA sensitized genetic backgrounds. Here, we report that a majority of the KH domain-containing genes genetically interact with multiple miRNAs and Argonaute alg-1. Interestingly, two KH domain genes, predicted splicing factors sfa-1 and asd-2, genetically interacted with all of the miRNA mutants tested, whereas other KH domain genes showed genetic interactions only with specific miRNAs. Our domain architecture and phylogenetic relationship analyses of the C. elegans KH domain-containing proteins revealed potential groups that may share both structure and function. Collectively, we show that many C. elegans KH domain RBPs functionally interact with miRNAs, suggesting direct or indirect coordination between these two classes of post-transcriptional gene expression regulators.
Collapse
Affiliation(s)
- Dustin Haskell
- Division of Biology, Kansas State University, Manhattan, KS 66506, USA
| | - Anna Zinovyeva
- Division of Biology, Kansas State University, Manhattan, KS 66506, USA
| |
Collapse
|
24
|
Peng W, Zhang C, Peng J, Huang Y, Peng C, Tan Y, Ji D, Zhang Y, Zhang D, Tang J, Feng Y, Sun Y. Lnc-FAM84B-4 acts as an oncogenic lncRNA by interacting with protein hnRNPK to restrain MAPK phosphatases-DUSP1 expression. Cancer Lett 2020; 494:94-106. [PMID: 32866608 DOI: 10.1016/j.canlet.2020.08.036] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 08/01/2020] [Accepted: 08/25/2020] [Indexed: 12/11/2022]
Abstract
The mitogen activated protein kinase (MAPK) pathway has been reported to be involved in many cancer developments. Normally, MAPK activity is self-limited between rapid phosphorylation and dephosphorylation. In abnormal conditions, however, this dynamic equilibrium is broken, trigging tumor-suppressing or -promoting roles. While dual-specificity MAPK phosphatases (MKP/DUSPs) are important for cascade control in MAPK pathway, their role in colorectal cancer (CRC) remains largely unknown. Here, we investigated lnc-FAM84B-4 and DUSP1 to systematically elucidate their underlying roles in MAPK singling pathway and functions in CRC. Upregulated lnc-FAM84B-4 was identified by re-mining CRC microarray. Functional assays were performed in vitro and in vivo. RNA-Seq, RNA pull-down, and RIP assays were used to investigate the mechanisms of Lnc-FAM84B-4 in regulating expression of DUSP1. The results indicated that Lnc-FAM84B-4 regulates MAPK pathway by restraining DUSP1 expression. Mechanistically, RNA pull-down followed by mass spectrum determined hnRNPK functions as a binding partner of lnc-FAM84B-4 in mediating DUSP1 expression. Our findings demonstrate the important role of lnc-FAM84B-4-hnRNPK-DUSP1 axis in CRC development, and suggest a therapeutic target for CRC treatment.
Collapse
Affiliation(s)
- Wen Peng
- The First School of Clinical Medicine, Nanjing Medical University, PR China, Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, 210029, PR China
| | - Chuan Zhang
- The First School of Clinical Medicine, Nanjing Medical University, PR China, Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, 210029, PR China
| | - Jianing Peng
- Nanjing Foreign Language School, British Columbia Academy, Nanjing, Jiangsu, 210008, PR China
| | - Yuanjian Huang
- The First School of Clinical Medicine, Nanjing Medical University, PR China, Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, 210029, PR China
| | - Chaofan Peng
- The First School of Clinical Medicine, Nanjing Medical University, PR China, Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, 210029, PR China
| | - Yuqian Tan
- The First School of Clinical Medicine, Nanjing Medical University, PR China, Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, 210029, PR China
| | - Dongjian Ji
- The First School of Clinical Medicine, Nanjing Medical University, PR China, Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, 210029, PR China
| | - Yue Zhang
- The First School of Clinical Medicine, Nanjing Medical University, PR China, Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, 210029, PR China
| | - Dongsheng Zhang
- The First School of Clinical Medicine, Nanjing Medical University, PR China, Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, 210029, PR China
| | - Junwei Tang
- The First School of Clinical Medicine, Nanjing Medical University, PR China, Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, 210029, PR China.
| | - Yifei Feng
- The First School of Clinical Medicine, Nanjing Medical University, PR China, Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, 210029, PR China.
| | - Yueming Sun
- The First School of Clinical Medicine, Nanjing Medical University, PR China, Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, 210029, PR China.
| |
Collapse
|
25
|
Escobar-Hoyos LF, Penson A, Kannan R, Cho H, Pan CH, Singh RK, Apken LH, Hobbs GA, Luo R, Lecomte N, Babu S, Pan FC, Alonso-Curbelo D, Morris JP, Askan G, Grbovic-Huezo O, Ogrodowski P, Bermeo J, Saglimbeni J, Cruz CD, Ho YJ, Lawrence SA, Melchor JP, Goda GA, Bai K, Pastore A, Hogg SJ, Raghavan S, Bailey P, Chang DK, Biankin A, Shroyer KR, Wolpin BM, Aguirre AJ, Ventura A, Taylor B, Der CJ, Dominguez D, Kümmel D, Oeckinghaus A, Lowe SW, Bradley RK, Abdel-Wahab O, Leach SD. Altered RNA Splicing by Mutant p53 Activates Oncogenic RAS Signaling in Pancreatic Cancer. Cancer Cell 2020; 38:198-211.e8. [PMID: 32559497 PMCID: PMC8028848 DOI: 10.1016/j.ccell.2020.05.010] [Citation(s) in RCA: 88] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/26/2019] [Revised: 01/17/2020] [Accepted: 05/11/2020] [Indexed: 12/13/2022]
Abstract
Pancreatic ductal adenocarcinoma (PDAC) is driven by co-existing mutations in KRAS and TP53. However, how these mutations collaborate to promote this cancer is unknown. Here, we uncover sequence-specific changes in RNA splicing enforced by mutant p53 which enhance KRAS activity. Mutant p53 increases expression of splicing regulator hnRNPK to promote inclusion of cytosine-rich exons within GTPase-activating proteins (GAPs), negative regulators of RAS family members. Mutant p53-enforced GAP isoforms lose cell membrane association, leading to heightened KRAS activity. Preventing cytosine-rich exon inclusion in mutant KRAS/p53 PDACs decreases tumor growth. Moreover, mutant p53 PDACs are sensitized to inhibition of splicing via spliceosome inhibitors. These data provide insight into co-enrichment of KRAS and p53 mutations and therapeutics targeting this mechanism in PDAC.
Collapse
Affiliation(s)
- Luisa F Escobar-Hoyos
- David M. Rubenstein Center for Pancreatic Cancer Research, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Department of Therapeutic Radiology, Yale University, School of Medicine, New Haven, CT 06520, USA; Department of Biology, Research Group Genetic Toxicology and Cytogenetics, School of Natural Sciences and Education, Universidad del Cauca, Popayán, Colombia; Department of Pathology, Renaissance School of Medicine, Stony Brook University, New York, NY 11794, USA.
| | - Alex Penson
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Marie-José and Henry R. Kravis Center for Molecular Oncology, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Ram Kannan
- Howard Hughes Medical Institute, Cancer Biology & Genetics Program, Sloan-Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Hana Cho
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Chun-Hao Pan
- Department of Pathology, Renaissance School of Medicine, Stony Brook University, New York, NY 11794, USA
| | - Rohit K Singh
- Institute of Biochemistry, University of Münster, Münster, Germany
| | - Lisa H Apken
- Institute of Molecular Tumor Biology, University of Münster, Münster, Germany
| | - G Aaron Hobbs
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Renhe Luo
- Gerstner Sloan Kettering Graduate School of Biomedical Sciences, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Nicolas Lecomte
- David M. Rubenstein Center for Pancreatic Cancer Research, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Sruthi Babu
- Department of Pathology, Renaissance School of Medicine, Stony Brook University, New York, NY 11794, USA
| | - Fong Cheng Pan
- David M. Rubenstein Center for Pancreatic Cancer Research, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Direna Alonso-Curbelo
- David M. Rubenstein Center for Pancreatic Cancer Research, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Marie-José and Henry R. Kravis Center for Molecular Oncology, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - John P Morris
- David M. Rubenstein Center for Pancreatic Cancer Research, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Marie-José and Henry R. Kravis Center for Molecular Oncology, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Gokce Askan
- David M. Rubenstein Center for Pancreatic Cancer Research, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Olivera Grbovic-Huezo
- David M. Rubenstein Center for Pancreatic Cancer Research, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Marie-José and Henry R. Kravis Center for Molecular Oncology, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Paul Ogrodowski
- Howard Hughes Medical Institute, Cancer Biology & Genetics Program, Sloan-Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Jonathan Bermeo
- David M. Rubenstein Center for Pancreatic Cancer Research, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Joseph Saglimbeni
- David M. Rubenstein Center for Pancreatic Cancer Research, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Cristian D Cruz
- David M. Rubenstein Center for Pancreatic Cancer Research, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Yu-Jui Ho
- Howard Hughes Medical Institute, Cancer Biology & Genetics Program, Sloan-Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Sharon A Lawrence
- David M. Rubenstein Center for Pancreatic Cancer Research, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Jerry P Melchor
- David M. Rubenstein Center for Pancreatic Cancer Research, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Grant A Goda
- Department of Pharmacology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA; Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Karen Bai
- Department of Pathology, Renaissance School of Medicine, Stony Brook University, New York, NY 11794, USA
| | - Alessandro Pastore
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Simon J Hogg
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Srivatsan Raghavan
- Department of Medical Oncology, Dana Farber Cancer Institute, Boston, MA 02215, USA; Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA
| | - Peter Bailey
- Department of General Surgery, University of Heidelberg, Im Neuenheimer Feld 110, Heidelberg, Baden-Württemberg 69120, Germany; Institute of Cancer Sciences, University of Glasgow, Garscube Estate, Switchback Road, Bearsden, G61 1Q, Glasgow, UK
| | - David K Chang
- The Kinghorn Cancer Centre, and the Cancer Research Program, Garvan Institute of Medical Research, Darlinghurst, Sydney, NSW, Australia; Department of Surgery, Bankstown Hospital, Eldridge Road, Bankstown, Sydney, NSW, Australia; South Western Sydney Clinical School, Faculty of Medicine, University of New South Wales, Liverpool, NSW, Australia
| | - Andrew Biankin
- Department of General Surgery, University of Heidelberg, Im Neuenheimer Feld 110, Heidelberg, Baden-Württemberg 69120, Germany; Institute of Cancer Sciences, University of Glasgow, Garscube Estate, Switchback Road, Bearsden, G61 1Q, Glasgow, UK; The Kinghorn Cancer Centre, and the Cancer Research Program, Garvan Institute of Medical Research, Darlinghurst, Sydney, NSW, Australia; Department of Surgery, Bankstown Hospital, Eldridge Road, Bankstown, Sydney, NSW, Australia
| | - Kenneth R Shroyer
- Department of Pathology, Renaissance School of Medicine, Stony Brook University, New York, NY 11794, USA
| | - Brian M Wolpin
- Department of Medical Oncology, Dana Farber Cancer Institute, Boston, MA 02215, USA
| | - Andrew J Aguirre
- Department of Medical Oncology, Dana Farber Cancer Institute, Boston, MA 02215, USA; Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA
| | - Andrea Ventura
- Howard Hughes Medical Institute, Cancer Biology & Genetics Program, Sloan-Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Barry Taylor
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Marie-José and Henry R. Kravis Center for Molecular Oncology, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Departments of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Channing J Der
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA; Department of Pharmacology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Daniel Dominguez
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA; Department of Pharmacology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Daniel Kümmel
- Institute of Biochemistry, University of Münster, Münster, Germany
| | - Andrea Oeckinghaus
- Institute of Molecular Tumor Biology, University of Münster, Münster, Germany
| | - Scott W Lowe
- David M. Rubenstein Center for Pancreatic Cancer Research, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Howard Hughes Medical Institute, Cancer Biology & Genetics Program, Sloan-Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Howard Hughes Medical Institute, Chevy Chase, MD 20815, USA
| | - Robert K Bradley
- Fred Hutchinson Cancer Research Center Seattle, Seattle, WA 98109-1024, USA
| | - Omar Abdel-Wahab
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Steven D Leach
- David M. Rubenstein Center for Pancreatic Cancer Research, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Dartmouth Norris Cotton Cancer Center, Lebanon, NH 03766, USA.
| |
Collapse
|
26
|
Abstract
Heterogeneous nuclear ribonucleoprotein K (hnRNPK), a ubiquitously occurring RNA-binding protein (RBP), can interact with numerous nucleic acids and various proteins and is involved in a number of cellular functions including transcription, translation, splicing, chromatin remodelling, etc. Through its abundant biological functions, hnRNPK has been implicated in cellular events including proliferation, differentiation, apoptosis, DNA damage repair and the stress and immune responses. Thus, it is critical to understand the mechanism of hnRNPK regulation and its downstream effects on cancer and other diseases. A number of recent studies have highlighted that several post-translational modifications (PTMs) possibly play an important role in modulating hnRNPK function. Phosphorylation is the most widely occurring PTM in hnRNPK. For example, in vivo analyses of sites such as S116 and S284 illustrate the purpose of PTM of hnRNPK in altering its subcellular localization and its ability to bind target nucleic acids or proteins. Other PTMs such as methylation, ubiquitination, sumoylation, glycosylation and proteolytic cleavage are increasingly implicated in the regulation of DNA repair, cellular stresses and tumour growth. In this review, we describe the PTMs that impact upon hnRNPK function on gene expression programmes and different disease states. This knowledge is key in allowing us to better understand the mechanism of hnRNPK regulation.
Collapse
Affiliation(s)
- Yongjie Xu
- College of Life Science, Xinyang Normal University , Xinyang 464000 , People's Republic of China
| | - Wei Wu
- College of Life Science, Xinyang Normal University , Xinyang 464000 , People's Republic of China
| | - Qiu Han
- College of Life Science, Xinyang Normal University , Xinyang 464000 , People's Republic of China
| | - Yaling Wang
- College of Life Science, Xinyang Normal University , Xinyang 464000 , People's Republic of China
| | - Cencen Li
- College of Life Science, Xinyang Normal University , Xinyang 464000 , People's Republic of China
| | - Pengpeng Zhang
- College of Life Science, Xinyang Normal University , Xinyang 464000 , People's Republic of China
| | - Haixia Xu
- College of Life Science, Xinyang Normal University , Xinyang 464000 , People's Republic of China
| |
Collapse
|
27
|
Li Y, Chen H, Li S, Li Y, Liu G, Bai J, Luo H, Lan X, He Z. LncSSBP1 Functions as a Negative Regulator of IL-6 Through Interaction With hnRNPK in Bronchial Epithelial Cells Infected With Talaromyces marneffei. Front Immunol 2020; 10:2977. [PMID: 31998294 PMCID: PMC6966331 DOI: 10.3389/fimmu.2019.02977] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Accepted: 12/04/2019] [Indexed: 12/12/2022] Open
Abstract
Talaromyces marneffei (TM) is an important opportunistic pathogenic fungus capable of causing disseminated lethal infection. In our previous study, we identified host lncRNAs and mRNAs that are dysregulated in TM-infected bronchial epithelial cells. In this report, we verified that IL-6, a key factor in acute inflammatory response, is down-regulated in TM pathogenesis. To elucidate the mechanism of IL-6 regulation, we analyzed the coding/non-coding network, and identified lncSSBP1, a novel lncRNA that is up-regulated by TM. Our results demonstrate that overexpression of lncSSBP1 decreases IL-6 mRNA expression, whereas knockdown of lncSSBP1 enhances IL-6 mRNA expression. Though lncSSBP1 is primarily localized to the nucleus, bioinformatics analysis suggests that it is unlikely to function as competing endogenous RNA or to interact with IL-6 transcription factors. Instead, RNA pull down and RNA immunoprecipitation assays showed that lncSSBP1 binds specifically to heterogenous nuclear ribonucleoprotein K (hnRNPK), which is involved in IL-6 mRNA processing. Our findings suggest that lncSSBP1 may affect IL-6 mRNA expression during TM infection through interaction with hnRNPk in bronchial epithelial cells. Our results suggest a novel pathway by which TM may suppress the immune response to its advantage.
Collapse
Affiliation(s)
- Yinghua Li
- Department of Pulmonary and Critical Care Medicine, Second Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Huan Chen
- Department of Pulmonary and Critical Care Medicine, Sixth Affiliated Hospital of Guangxi Medical University, Yulin, China
| | - Shuyi Li
- Guangxi Colleges and Universities Key Laboratory of Preclinical Medicine Research, Guangxi Medical University, Nanning, China
| | - Yu Li
- Department of Pulmonary and Critical Care Medicine, Second Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Guangnan Liu
- Department of Pulmonary and Critical Care Medicine, Second Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Jing Bai
- Department of Pulmonary and Critical Care Medicine, First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Honglin Luo
- School of Basic Medicine, Guangxi Medical University, Nanning, China
| | - Xiuwan Lan
- Guangxi Colleges and Universities Key Laboratory of Preclinical Medicine Research, Guangxi Medical University, Nanning, China
| | - Zhiyi He
- Department of Pulmonary and Critical Care Medicine, First Affiliated Hospital of Guangxi Medical University, Nanning, China
| |
Collapse
|
28
|
Peng WZ, Liu JX, Li CF, Ma R, Jie JZ. hnRNPK promotes gastric tumorigenesis through regulating CD44E alternative splicing. Cancer Cell Int 2019; 19:335. [PMID: 31857793 PMCID: PMC6909542 DOI: 10.1186/s12935-019-1020-x] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Accepted: 11/08/2019] [Indexed: 11/10/2022] Open
Abstract
Background The high prevalence of alternative splicing among genes implies the importance of genomic complexity in regulating normal physiological processes and diseases such as gastric cancer (GC). The standard form of stem cell marker CD44 (CD44S) and its alternatives with additional exons are reported to play important roles in multiple types of tumors, but the regulation mechanism of CD44 alternative splicing is not fully understood. Methods Here the expression of hnRNPK was analyzed among the Cancer Genome Atlas (TCGA) cohort of GC. The function of hnRNPK in GC cells was analyzed and its downstream targeted gene was identified by chromatin immunoprecipitation and dual luciferase report assay. Finally, effect of hnRNPK and its downstream splicing regulator on CD44 alternative splicing was investigated. Results The expression of hnRNPK was significantly increased in GC and its upregulation was associated with tumor stage and metastasis. Loss-of-function studies found that hnRNPK could promote GC cell proliferation, migration, and invasion. The upregulation of hnRNPK activates the expression of the splicing regulator SRSF1 by binding to the first motif upstream the start codon (- 65 to - 77 site), thereby increasing splicing activity and expression of an oncogenic CD44 isoform, CD44E (has additional variant exons 8 to 10, CD44v8-v10). Conclusion These findings revealed the importance of the hnRNPK-SRSF1-CD44E axis in promoting gastric tumorigenesis.
Collapse
Affiliation(s)
- Wei-Zhao Peng
- 1Department of General Surgery, China-Japan Friendship Hospital, Beijing, 100029 China
| | - Ji-Xi Liu
- 2Department of Gastroenterology, China-Japan Friendship Hospital, Beijing, 100029 China
| | - Chao-Feng Li
- 1Department of General Surgery, China-Japan Friendship Hospital, Beijing, 100029 China
| | - Ren Ma
- 1Department of General Surgery, China-Japan Friendship Hospital, Beijing, 100029 China
| | - Jian-Zheng Jie
- 1Department of General Surgery, China-Japan Friendship Hospital, Beijing, 100029 China
| |
Collapse
|
29
|
Wang Z, Qiu H, He J, Liu L, Xue W, Fox A, Tickner J, Xu J. The emerging roles of hnRNPK. J Cell Physiol 2019; 235:1995-2008. [PMID: 31538344 DOI: 10.1002/jcp.29186] [Citation(s) in RCA: 71] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2019] [Accepted: 08/23/2019] [Indexed: 12/15/2022]
Abstract
Heterogeneous nuclear ribonucleoprotein K (hnRNPK) is an DNA/RNA-binding protein and regulates a wide range of biological processes and disease pathogenesis. It contains 3 K-homologous (KH) domains, which are conserved in other RNA-binding proteins, mediate nucleic acid binding activity, and function as an enhancer or repressor of gene transcription. Phosphorylation of the protein alters its regulatory function, which also enables the protein to serve as a docking platform for the signal transduction proteins. In terms of the function of hnRNPK, it is central to many cellular events, including long noncoding RNA (lncRNA) regulation, cancer development and bone homoeostasis. Many studies have identified hnRNPK as an oncogene, where it is overexpressed in cancer tissues compared with the nonneoplastic tissues and its expression level is related to the prognosis of different types of host malignancies. However, hnRNPK has also been identified as a tumour suppressor, as it is important for the activation of the p53/p21 pathway. Recently, the protein is also found to be exclusively related to the regulation of paraspeckles and lncRNAs such as Neat1, Lncenc1 and Xist. Interestingly, hnRNPK has been found to associate with the Kabuki-like syndrome and Au-Kline syndrome with prominent skeletal abnormalities. In vitro study revealed that the hnRNPK protein is essential for the formation of osteoclast, in line with its importance in the skeletal system.
Collapse
Affiliation(s)
- Ziyi Wang
- School of Biomedical Sciences, Faculty of Health and Medical Sciences, The University of Western Australia, Perth, Western Australia, Australia
| | - Heng Qiu
- School of Biomedical Sciences, Faculty of Health and Medical Sciences, The University of Western Australia, Perth, Western Australia, Australia
| | - Jianbo He
- School of Biomedical Sciences, Faculty of Health and Medical Sciences, The University of Western Australia, Perth, Western Australia, Australia.,Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China
| | - Langxia Liu
- Key laboratory of functional protein research of Guangdong higher education institutes, Institute of life and health engineering, Jinan University, Guangzhou, China
| | - Wei Xue
- Department of Biomedical Engineering, Jinan University, Guangzhou, China
| | - Archa Fox
- School of Human Sciences and Molecular Sciences, The University of Western Australia and Harry Perkins Institute of Medical Research, Centre for Medical Research, The University of Western Australia, Perth, Western Australia, Australia
| | - Jennifer Tickner
- School of Biomedical Sciences, Faculty of Health and Medical Sciences, The University of Western Australia, Perth, Western Australia, Australia
| | - Jiake Xu
- School of Biomedical Sciences, Faculty of Health and Medical Sciences, The University of Western Australia, Perth, Western Australia, Australia
| |
Collapse
|
30
|
Xu L, Zhang T, Huang W, Liu X, Lu J, Gao X, Zhang YF, Liu L. YAP mediates the positive regulation of hnRNPK on the lung adenocarcinoma H1299 cell growth. Acta Biochim Biophys Sin (Shanghai) 2019; 51:677-687. [PMID: 31187136 DOI: 10.1093/abbs/gmz053] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Indexed: 01/08/2023] Open
Abstract
Lung cancer is the leading cause of cancer death worldwide, and non-small cell lung cancer (NSCLC) accounts for 80%-85% of diagnostic cases. The molecular mechanisms of NSCLC pathogenesis are not well understood. Heterogeneous nuclear ribonucleoprotein K (hnRNPK) is a multifunctional protein that regulates gene expression and signal transduction and closely associated with tumorigenesis, but its mechanism of action in the pathogenesis of NSCLC is unclear. In this study, we observed that the expression pattern of hnRNPK in H1299 lung adenocarcinoma cells varied depending on the cell density in culture. Moreover, hnRNPK stimulated the ability of proliferation and colony formation of H1299 cells, which is important for the multilayered cell growth in culture. We further investigated whether there is an association between hnRNPK and the elements involved in the cell contact inhibition pathway. By using quantitative reverse transcriptase-polymerase chain reaction assay and a YAP activity reporter system, we found that hnRNPK upregulated the mRNA and protein levels and transcriptional activity of Yes-associated protein 1 (YAP), a master negative regulator of Hippo contact inhibition pathway. Furthermore, YAP knockdown with siRNA abolished the stimulatory effect of hnRNPK on H1299 cell proliferation. These results suggested that YAP could be one of the effectors of hnRNPK. Our data may provide new clues for further understanding the biological functions of hnRNPK, particularly in the context of lung adenocarcinoma oncogenesis.
Collapse
Affiliation(s)
- Lipei Xu
- Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, Jinan University, Guangzhou 510632, China
| | - Tingting Zhang
- Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, Jinan University, Guangzhou 510632, China
| | - Wensi Huang
- Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, Jinan University, Guangzhou 510632, China
| | - Xiaohui Liu
- Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, Jinan University, Guangzhou 510632, China
| | - Junlei Lu
- Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, Jinan University, Guangzhou 510632, China
| | - Xuejuan Gao
- Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, Jinan University, Guangzhou 510632, China
| | - Yun-Fang Zhang
- Center of Kidney Disease, Huadu District People’s Hospital, Southern Medical University, Guangzhou 510800, China
| | - Langxia Liu
- Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, Jinan University, Guangzhou 510632, China
| |
Collapse
|
31
|
Liu XH, Ma J, Feng JX, Feng Y, Zhang YF, Liu LX. Regulation and related mechanism of GSN mRNA level by hnRNPK in lung adenocarcinoma cells. Biol Chem 2019; 400:951-963. [PMID: 30771276 DOI: 10.1515/hsz-2018-0417] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [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: 10/31/2018] [Accepted: 02/11/2019] [Indexed: 01/20/2023]
Abstract
Gelsolin (GSN) is an actin filament-capping protein that plays a key role in cell migration. Here we show that heterogeneous nuclear ribonucleoprotein K (hnRNPK) regulates GSN expression level by binding to the 3'-untranslated region (3'UTR) of GSN mRNA in non-small cell lung cancers (NSCLC) H1299 cells which are highly metastatic and express high level of GSN. We found that hnRNPK overexpression increased the mRNA and protein level of GSN, whereas hnRNPK knockdown by siRNA decreased the mRNA and protein level of GSN in both H1299 and A549 cells, indicating a positive role of hnRNPK in the regulation of GSN expression. Furthermore, hnRNPK knockdown affected the migration ability of H1299 and A549 cells which could be rescued by ectopic expression of GSN in those cells. Conversely, GSN knockdown in hnRNPK-overexpressing cells could abort the stimulatory effect of hnRNPK on the cell migration. These results suggest that hnRNPK function in the regulation of cell migration is GSN-dependent. Taken together, these data unveiled a new mechanism of regulation of the GSN expression by hnRNPK and provides new clues for the discovery of new anti-metastatic therapy.
Collapse
Affiliation(s)
- Xiao-Hui Liu
- Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, 601 Huangpu Avenue West, Guangzhou 510632, China
| | - Jie Ma
- Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, 601 Huangpu Avenue West, Guangzhou 510632, China
| | - Jun-Xia Feng
- Department of Nephrology, Huadu District People's Hospital of Guangzhou, Southern Medical University, Guangzhou 510800, China
| | - Yuan Feng
- Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, 601 Huangpu Avenue West, Guangzhou 510632, China
| | - Yun-Fang Zhang
- Department of Nephrology, Huadu District People's Hospital of Guangzhou, Southern Medical University, Guangzhou 510800, China
| | - Lang-Xia Liu
- Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, 601 Huangpu Avenue West, Guangzhou 510632, China
| |
Collapse
|
32
|
Gu P, Chen X, Xie R, Xie W, Huang L, Dong W, Han J, Liu X, Shen J, Huang J, Lin T. A novel AR translational regulator lncRNA LBCS inhibits castration resistance of prostate cancer. Mol Cancer 2019; 18:109. [PMID: 31221168 PMCID: PMC6585145 DOI: 10.1186/s12943-019-1037-8] [Citation(s) in RCA: 70] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Accepted: 06/11/2019] [Indexed: 12/25/2022] Open
Abstract
Background Progression to a castration resistance state is the main cause of deaths in prostate cancer (PCa) patients. Androgen Receptor (AR) signaling plays the central role in progression of Castration Resistant Prostate Cancer (CRPC), therefore understanding the mechanisms of AR activation in the milieu of low androgen is critical to discover novel approach to treat CRPC. Methods Firstly, we explore the CRPC associated lncRNAs by transcriptome microarray. The expression and clinical features of lnc-LBCS are analyzed in three independent large-scale cohorts. The functional role and mechanism of lnc-LBCS are further investigated by gain and loss of function assays in vitro. Results The expression of Lnc-LBCS was lower in CRPC cells lines and tissues. LBCS downregulation was correlated with higher Gleason Score, T stage and poor prognosis of PCa patients. LBCS overexpression decreases, whereas LBCS knockdown increases, the traits of castration resistance in prostate cancer cells under androgen ablated or AR blocked condition. Moreover, knockdown of LBCS was sufficient to activate AR signaling in the absence of androgen by elevating the translation of AR protein. Mechanistically, LBCS interacted directly with hnRNPK to suppress AR translation efficiency by forming complex with hnRNPK and AR mRNA. Conclusions Lnc-LBCS functions as a novel AR translational regulator that suppresses castration resistance of prostate cancer by interacting with hnRNPK. This sheds a new insight into the regulation of CRPC by lncRNA mediated AR activation and LBCS-hnRNPK-AR axis provides a promising approach to the treatment of CRPC. Electronic supplementary material The online version of this article (10.1186/s12943-019-1037-8) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Peng Gu
- Department of Urology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, 107. W. Yanjiang Road, Guangzhou, 510120, China.,Department of Urology, The 1st Affiliated Hospital of Kunming Medical University, Kunming, 650032, China
| | - Xu Chen
- Department of Urology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, 107. W. Yanjiang Road, Guangzhou, 510120, China. .,Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, 510120, China.
| | - Ruihui Xie
- Department of Urology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, 107. W. Yanjiang Road, Guangzhou, 510120, China.,Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, 510120, China
| | - Weibin Xie
- Department of Urology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, 107. W. Yanjiang Road, Guangzhou, 510120, China
| | - Li Huang
- Department of Urology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, 107. W. Yanjiang Road, Guangzhou, 510120, China
| | - Wen Dong
- Department of Urology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, 107. W. Yanjiang Road, Guangzhou, 510120, China
| | - Jinli Han
- Department of Urology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, 107. W. Yanjiang Road, Guangzhou, 510120, China
| | - Xiaodong Liu
- Department of Urology, The 1st Affiliated Hospital of Kunming Medical University, Kunming, 650032, China
| | - Jihong Shen
- Department of Urology, The 1st Affiliated Hospital of Kunming Medical University, Kunming, 650032, China
| | - Jian Huang
- Department of Urology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, 107. W. Yanjiang Road, Guangzhou, 510120, China.
| | - Tianxin Lin
- Department of Urology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, 107. W. Yanjiang Road, Guangzhou, 510120, China. .,Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, 510120, China. .,RNA Biomedical Institute, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, 510120, China.
| |
Collapse
|
33
|
Xu Y, Wu W, Han Q, Wang Y, Li C, Zhang P, Xu H. New Insights into the Interplay between Non-Coding RNAs and RNA-Binding Protein HnRNPK in Regulating Cellular Functions. Cells 2019; 8:E62. [PMID: 30658384 DOI: 10.3390/cells8010062] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Revised: 01/08/2019] [Accepted: 01/15/2019] [Indexed: 12/15/2022] Open
Abstract
The emerging data indicates that non-coding RNAs (ncRNAs) epresent more than the “junk sequences” of the genome. Both miRNAs and long non-coding RNAs (lncRNAs) are involved in fundamental biological processes, and their deregulation may lead to oncogenesis and other diseases. As an important RNA-binding protein (RBP), heterogeneous nuclear ribonucleoprotein K (hnRNPK) is known to regulate gene expression through the RNA-binding domain involved in various pathways, such as transcription, splicing, and translation. HnRNPK is a highly conserved gene that is abundantly expressed in mammalian cells. The interaction of hnRNPK and ncRNAs defines the novel way through which ncRNAs affect the expression of protein-coding genes and form autoregulatory feedback loops. This review summarizes the interactions of hnRNPK and ncRNAs in regulating gene expression at transcriptional and post-transcriptional levels or by changing the genomic structure, highlighting their involvement in carcinogenesis, glucose metabolism, stem cell differentiation, virus infection and other cellular functions. Drawing connections between such discoveries might provide novel targets to control the biological outputs of cells in response to different stimuli.
Collapse
|
34
|
Kreiter N, Pal A, Lojewski X, Corcia P, Naujock M, Reinhardt P, Sterneckert J, Petri S, Wegner F, Storch A, Hermann A. Age-dependent neurodegeneration and organelle transport deficiencies in mutant TDP43 patient-derived neurons are independent of TDP43 aggregation. Neurobiol Dis 2018; 115:167-81. [PMID: 29630989 DOI: 10.1016/j.nbd.2018.03.010] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Revised: 02/27/2018] [Accepted: 03/23/2018] [Indexed: 01/07/2023] Open
Abstract
TAR DNA-binding protein 43 (TDP43) plays a significant role in familiar and sporadic amyotrophic lateral sclerosis (ALS). The diverse postulated mechanisms by which TDP43 mutations cause the disease are not fully understood. Human wildtype and TDP43 S393L and G294V mutant spinal motor neuron cultures were differentiated from patient-derived iPSCs. Mutant hTDP43 and wildtype motor neuron cultures did not differ in neuron differentiation capacity during early maturation stage. During aging we detected a dramatic neurodegeneration including neuron loss and pathological neurofilament abnormalities only in TDP43 mutant cultures. Additionally mitochondria and lysosomes of aging spinal motor neurons revealed robust TDP43 mutation dependent abnormal phenotypes in size, shape, speed and motility which all appeared without TDP43 mislocalization or aggregation formation. Furthermore, D-sorbitol - known to induce stress granules and cytoplasmic mislocalization of TDP43 - rescued axonal trafficking phenotypes without signs of TDP43 mislocalization or aggregation formation. Our data indicate TDP43 mutation-dependent but cytosolic aggregation-independent mechanisms of motor neuron degeneration in TDP43 ALS.
Collapse
|
35
|
Hammam O, Magdy M, Anas A, Rahim AA, Heedaya M, Helmy A. Expression of hnRNPK & Claudin-4 in HCV-Induced Early HCC and Adjacent Liver Tissue. Open Access Maced J Med Sci 2017; 5:595-602. [PMID: 28932298 PMCID: PMC5591587 DOI: 10.3889/oamjms.2017.092] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2017] [Revised: 06/16/2017] [Accepted: 06/17/2017] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND: HCC in Egypt usually occurs in HCV cirrhotic livers with poor prognosis due to late diagnosis. High hnRNPK & low Claudin-4 profiles indicate Epithelial Mesenchymal Transition (EMT), malignant transformation and high-grade tumours. AIM: We studied the immunohistochemical expression of hnRNPK and Claudin-4 in HCV induced early HCC (eHCC) and adjacent liver tissue in Egyptian patients to improve eHCC detection in cirrhotic livers with better curative therapy options. METHOD: We studied the immunohistochemical expression of hnRNPK and Claudin-4 in 100 Egyptian patients resection specimens of HCV induced early HCC (eHCC) and adjacent liver tissue, in order to improve eHCC detection in cirrhotic livers, thus improving their therapeutic options. RESULTS: Early HCC grade significantly directly correlated with nuclear hnRNPK/5HPFs count and inversely correlated with Claudin-4 expression %, with a converse correlation between hnRNPK and Claudin-4. Moreover in eHCC, combined hnRNPK ≥ 30/5HPFs & Claudin-4 ≥ 40% significantly distinguished low grade eHCC (G1) from high grade eHCC (G2&G3), with sensitivity 97% & specificity 69.7% for hnRNPK ≥ 30/5HPFs, and with sensitivity 70% & specificity 94.3% for Claudin-4 ≥ 40%. Moreover in the adjacent liver, both markers expressions significantly directly correlated with each other and with METAVIR fibrosis score but not with activity. Furthermore, 58% of eHCCs showed hnRNPK ≥ 30 Claudin-4 < 40% profile, indicating EMT type 3, compared to 26% with hnRNPK ≥ 30 Claudin-4 ≤ 10% profile in adjacent cirrhotic/ precirrhotic liver, with significant use of combined hnRNPK ≥ 30/5HPFs & Claudin 4 ≤ 10% as eHCC prediction cut offs in cirrhosis (p < 0.05). CONCLUSION: Combination of hnRNPK and Claudin-4 can indicate early HCC development in HCV cirrhotic livers using hnRNPK ≥ 30/5HPFs & Claudin-4 ≤ 10% cut offs. Also, combination of hnRNPK ≥ 30/5HPFs & Claudin-4 ≥ 40% can distinguish low grade eHCC (G1) from high grade eHCC (G2&G3).
Collapse
Affiliation(s)
- Olfat Hammam
- Department of Pathology Theodor Bilharz Research Institute (TBRI), Imbaba, Giza, Egypt
| | - Mona Magdy
- Department of Pathology Theodor Bilharz Research Institute (TBRI), Imbaba, Giza, Egypt
| | - Amgad Anas
- Department of Hepato-gastroenterology, Theodor Bilharz Research Institute (TBRI), Imbaba, Giza, Egypt
| | - Ali Abdel Rahim
- Department of Hepato-gastroenterology, Theodor Bilharz Research Institute (TBRI), Imbaba, Giza, Egypt
| | - Mohamed Heedaya
- Department of General Surgery, Theodor Bilharz Research Institute (TBRI), Imbaba, Giza, Egypt
| | - Ahmed Helmy
- Department of General Surgery, Theodor Bilharz Research Institute (TBRI), Imbaba, Giza, Egypt
| |
Collapse
|
36
|
Huang WS, Xu FM, Zeng QZ, Liu XH, Gao XJ, Liu LX. ERK1/2-mediated Cytoplasmic Accumulation of hnRNPK Antagonizes TRAIL-induced Apoptosis through Upregulation of XIAP in H1299 Cells. Biomed Environ Sci 2017; 30:473-481. [PMID: 28756806 DOI: 10.3967/bes2017.063] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 03/11/2017] [Accepted: 06/08/2017] [Indexed: 06/07/2023]
Abstract
OBJECTIVE Tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) resistance greatly limits the clinical therapeutic efficacy of TRAIL. Elucidating the molecular mechanism underlying TRAIL resistance will be fundamental to resolving this problem. METHODS Nuclear and cytoplasmic protein extraction and immuno?uorescence (IF) assay were used to detect changes in heterogeneous nuclear ribonucleoprotein K (hnRNPK) localization in H1299 cells. The evaluation of cell apoptosis in cells transfected with GFP-hnRNPK, GFP-hnRNPK S284/353A, or GFP-hnRNPK S284/353D mutant was performed using cleaved caspase-3 antibody. The gene expression of XIAP was tested by quantitative RT-PCR. RESULTS Previously, we reported that hnRNPK antagonized TRAIL-induced apoptosis through inhibition of PKC-mediated GSK3β phosphorylation. In this study, we further demonstrate that TRAIL treatment induces cytoplasmic accumulation of hnRNPK in H1299 cells. The hnRNPK localized in the cytoplasm has a higher capacity to antagonize TRAIL-induced apoptosis. Both ERK1/2 signaling inhibitor U0126 and ERK-phosphoacceptor-site mutant (GFP-hnRNPK S284/353A) diminish cytoplasmic accumulation of hnRNPK induced by TRAIL. Moreover, we show that XIAP is involved in hnRNPK-mediated TRAIL resistance in H1299 cells. CONCLUSION Taken together, these results give new insights into the understanding of the molecular mechanism associated with TRAIL resistance in lung adenocarcinoma.
Collapse
Affiliation(s)
- Wen Si Huang
- Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, Jinan University, Guangzhou 510632, Guangdong, China
| | - Feng Mei Xu
- Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, Jinan University, Guangzhou 510632, Guangdong, China
| | - Qing Zhong Zeng
- Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, Jinan University, Guangzhou 510632, Guangdong, China
| | - Xiao Hui Liu
- Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, Jinan University, Guangzhou 510632, Guangdong, China
| | - Xue Juan Gao
- Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, Jinan University, Guangzhou 510632, Guangdong, China
| | - Lang Xia Liu
- Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, Jinan University, Guangzhou 510632, Guangdong, China
| |
Collapse
|
37
|
Zhu XH, Wang JM, Yang SS, Wang FF, Hu JL, Xin SN, Men H, Lu GF, Lan XL, Zhang D, Wang XY, Liao WT, Ding YQ, Liang L. Down-regulation of DAB2IP promotes colorectal cancer invasion and metastasis by translocating hnRNPK into nucleus to enhance the transcription of MMP2. Int J Cancer 2017; 141:172-183. [PMID: 28335083 DOI: 10.1002/ijc.30701] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2016] [Revised: 01/05/2017] [Accepted: 03/13/2017] [Indexed: 01/05/2023]
Abstract
DOC-2/DAB2 interacting protein (DAB2IP) is a RasGAP protein that shows a suppressive effect on cancer progression. Our previous study showed the involvement of transcription regulation of DAB2IP in metastasis of colorectal cancer (CRC). However, the molecular mechanisms of DAB2IP in regulating the progression of CRC need to be further explored. Here, we identified heterogeneous nuclear ribonucleoprotein K (hnRNPK) and matrix metalloproteinase 2 (MMP2) as vital downstream targets of DAB2IP in CRC cells by two-dimensional fluorescence difference gel electrophoresis and cDNA microassay, respectively. Mechanistically, down-regulation of DAB2IP increased the level of hnRNPK through MAPK/ERK signaling pathway. Subsequently, translocation of hnRNPK into nucleus enhanced the transcription activity of MMP2, and therefore promoted invasion and metastasis of CRC. Down-regulation of DAB2IP correlated negatively with hnRNPK and MMP2 expressions in CRC tissues. In conclusion, our study elucidates a novel mechanism of the DAB2IP/hnRNPK/MMP2 axis in the regulation of CRC invasion and metastasis, which may be a potential therapeutic target.
Collapse
Affiliation(s)
- X H Zhu
- Department of Pathology, Southern Medical University, Guangzhou, Guangdong Province, People's Republic of China.,Guangdong Province Key Laboratory of Molecular Tumor Pathology, Guangzhou, Guangdong Province, People's Republic of China
| | - J M Wang
- Department of Pathology, the Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan Province, China
| | - S S Yang
- Department of Pathology, Southern Medical University, Guangzhou, Guangdong Province, People's Republic of China.,Guangdong Province Key Laboratory of Molecular Tumor Pathology, Guangzhou, Guangdong Province, People's Republic of China
| | - F F Wang
- Department of Pathology, Southern Medical University, Guangzhou, Guangdong Province, People's Republic of China.,Guangdong Province Key Laboratory of Molecular Tumor Pathology, Guangzhou, Guangdong Province, People's Republic of China
| | - J L Hu
- Department of Pathology, Southern Medical University, Guangzhou, Guangdong Province, People's Republic of China.,Guangdong Province Key Laboratory of Molecular Tumor Pathology, Guangzhou, Guangdong Province, People's Republic of China
| | - S N Xin
- Department of Pathology, Southern Medical University, Guangzhou, Guangdong Province, People's Republic of China.,Guangdong Province Key Laboratory of Molecular Tumor Pathology, Guangzhou, Guangdong Province, People's Republic of China
| | - H Men
- Department of Pathology, Southern Medical University, Guangzhou, Guangdong Province, People's Republic of China.,Guangdong Province Key Laboratory of Molecular Tumor Pathology, Guangzhou, Guangdong Province, People's Republic of China
| | - G F Lu
- Department of Pathology, Southern Medical University, Guangzhou, Guangdong Province, People's Republic of China.,Guangdong Province Key Laboratory of Molecular Tumor Pathology, Guangzhou, Guangdong Province, People's Republic of China
| | - X L Lan
- Department of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong Province, People's Republic of China
| | - D Zhang
- Department of Pathology, Southern Medical University, Guangzhou, Guangdong Province, People's Republic of China.,Guangdong Province Key Laboratory of Molecular Tumor Pathology, Guangzhou, Guangdong Province, People's Republic of China
| | - X Y Wang
- Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong Province, People's Republic of China
| | - W T Liao
- Department of Pathology, Southern Medical University, Guangzhou, Guangdong Province, People's Republic of China.,Guangdong Province Key Laboratory of Molecular Tumor Pathology, Guangzhou, Guangdong Province, People's Republic of China
| | - Y Q Ding
- Department of Pathology, Southern Medical University, Guangzhou, Guangdong Province, People's Republic of China.,Guangdong Province Key Laboratory of Molecular Tumor Pathology, Guangzhou, Guangdong Province, People's Republic of China
| | - L Liang
- Department of Pathology, Southern Medical University, Guangzhou, Guangdong Province, People's Republic of China.,Guangdong Province Key Laboratory of Molecular Tumor Pathology, Guangzhou, Guangdong Province, People's Republic of China
| |
Collapse
|
38
|
Chen X, Gu P, Xie R, Han J, Liu H, Wang B, Xie W, Xie W, Zhong G, Chen C, Xie S, Jiang N, Lin T, Huang J. Heterogeneous nuclear ribonucleoprotein K is associated with poor prognosis and regulates proliferation and apoptosis in bladder cancer. J Cell Mol Med 2016; 21:1266-1279. [PMID: 27862976 PMCID: PMC5487918 DOI: 10.1111/jcmm.12999] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2016] [Accepted: 08/27/2016] [Indexed: 12/01/2022] Open
Abstract
Heterogeneous nuclear ribonucleoprotein K (hnRNPK) is an essential RNA- and DNA-binding protein that regulates diverse biological events, especially DNA transcription. hnRNPK overexpression is related to tumorigenesis in several cancers. However, both the expression patterns and biological mechanisms of hnRNPK in bladder cancer are unclear. We investigated hnRNPK expression by immunohistochemistry in 188 patients with bladder cancer, and found that hnRNPK expression levels were significantly increased in bladder cancer tissues and that high-hnRNPK expression was closely correlated with poor prognosis. Loss- and gain-of-function assays demonstrated that hnRNPK promoted proliferation, anti-apoptosis, and chemoresistance in bladder cancer cells in vitro, and hnRNPK knockdown suppressed tumorigenicity in vivo. Mechanistically, hnRNPK regulated various functions in bladder cancer by directly mediating cyclin D1, G0/G1 switch 2 (G0S2), XIAP-associated factor 1, and ERCC excision repair 4, endonuclease catalytic subunit (ERCC4) transcription. In conclusion, we discovered that hnRNPK plays an important role in bladder cancer, suggesting that it is a potential prognostic marker and a promising target for treating bladder cancer.
Collapse
Affiliation(s)
- Xu Chen
- Department of Urology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Peng Gu
- Department of Urology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Ruihui Xie
- Department of Urology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Jinli Han
- Department of Urology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Hao Liu
- Department of Urology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Bo Wang
- Department of Urology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Weibin Xie
- Department of Urology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Weijie Xie
- Department of Urology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Guangzheng Zhong
- Department of Urology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Changhao Chen
- Department of Urology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Shujie Xie
- Department of Urology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Ning Jiang
- Department of Urology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Tianxin Lin
- Department of Urology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Jian Huang
- Department of Urology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| |
Collapse
|
39
|
Zhang L, Feng J, Kong S, Wu M, Xi Z, Zhang B, Fu W, Lao Y, Tan H, Xu H. Nujiangexathone A, a novel compound from Garcinia nujiangensis, suppresses cervical cancer growth by targeting hnRNPK. Cancer Lett 2016; 380:447-456. [PMID: 27424288 DOI: 10.1016/j.canlet.2016.07.005] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Revised: 05/24/2016] [Accepted: 07/06/2016] [Indexed: 12/18/2022]
Abstract
Cervical cancer is among the most frequently diagnosed cancers in females worldwide. Nujiangexathone A (NJXA), a novel compound from Garcinia nujiangensis, has been shown to have anti-cancer potential. In this study, the anti-tumor effects and the underlying mechanisms of NJXA action were investigated. Our results suggested that NJXA induced G0/G1 cell cycle arrest in HeLa and SiHa cells by down-regulating cyclins B1, E1, and A and cyclin-dependent kinases 2, 4 and 6, while selectively restoring p27. Using two-dimensional gel electrophoresis, we showed that NJXA reduced the expression of heterogeneous nuclear ribonucleoprotein K (hnRNPK) by accelerating ubiquitin-proteasome-dependent hnRNPK degradation, which then induced cell cycle arrest through the c-Myc-cyclin/Cdk-Rb-E2F1 pathway. The loss-of-function study showed NJXA induced cell cycle arrest was mediated by down regulation of hnRNPK protein. In vivo results further confirmed the tumor inhibitory effect of NJXA via the down-regulation of hnRNPK, and NJXA induced no apparent toxicity. Our study suggests that NJXA may be a novel anti-cancer drug candidate, especially for treating cancers with abnormally high hnRNPK expression.
Collapse
Affiliation(s)
- Li Zhang
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China; Institute of Arthritis Research, Shanghai Academy of Chinese Medical Sciences, Guanghua Integrative Medicine Hospital, Shanghai University of T.C.M, Shanghai 201203, China; Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai 201203, China
| | - Jiling Feng
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China; Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai 201203, China
| | - Siyuan Kong
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China; Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai 201203, China
| | - Man Wu
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China; Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai 201203, China
| | - Zhichao Xi
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China; Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai 201203, China
| | - Baojun Zhang
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China; Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai 201203, China
| | - Wenwei Fu
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China; Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai 201203, China
| | - Yuanzhi Lao
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China; Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai 201203, China
| | - Hongsheng Tan
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China; Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai 201203, China.
| | - Hongxi Xu
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China; Institute of Arthritis Research, Shanghai Academy of Chinese Medical Sciences, Guanghua Integrative Medicine Hospital, Shanghai University of T.C.M, Shanghai 201203, China; Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai 201203, China.
| |
Collapse
|
40
|
Ziv-Av A, Giladi ND, Lee HK, Cazacu S, Finniss S, Xiang C, Pauker MH, Barda-Saad M, Poisson L, Brodie C. RTVP-1 regulates glioma cell migration and invasion via interaction with N-WASP and hnRNPK. Oncotarget 2015; 6:19826-40. [PMID: 26305187 DOI: 10.18632/oncotarget.4471] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Accepted: 05/22/2015] [Indexed: 11/25/2022] Open
Abstract
Glioblastoma (GBM) are characterized by increased invasion into the surrounding normal brain tissue. RTVP-1 is highly expressed in GBM and regulates the migration and invasion of glioma cells. To further study RTVP-1 effects we performed a pull-down assay using His-tagged RTVP-1 followed by mass spectrometry and found that RTVP-1 was associated with the actin polymerization regulator, N-WASP. This association was further validated by co-immunoprecipitation and FRET analysis. We found that RTVP-1 increased cell spreading, migration and invasion and these effects were at least partly mediated by N-WASP. Another protein which was found by the pull-down assay to interact with RTVP-1 is hnRNPK. This protein has been recently reported to associate with and to inhibit the effect of N-WASP on cell spreading. hnRNPK decreased cell migration, spreading and invasion in glioma cells. Using co-immunoprecipitation we validated the interactions of hnRNPK with N-WASP and RTVP-1 in glioma cells. In addition, we found that overexpression of RTVP-1 decreased the association of N-WASP and hnRNPK. In summary, we report that RTVP-1 regulates glioma cell spreading, migration and invasion and that these effects are mediated via interaction with N-WASP and by interfering with the inhibitory effect of hnRNPK on the function of this protein.
Collapse
|
41
|
Strozynski J, Heim J, Bunbanjerdsuk S, Wiesmann N, Zografidou L, Becker SK, Meierl AM, Gouveris H, Lüddens H, Grus F, Brieger J. Proteomic identification of the heterogeneous nuclear ribonucleoprotein K as irradiation responsive protein related to migration. J Proteomics 2014; 113:154-61. [PMID: 25281771 DOI: 10.1016/j.jprot.2014.09.017] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2014] [Revised: 08/26/2014] [Accepted: 09/20/2014] [Indexed: 01/20/2023]
Abstract
UNLABELLED Irradiation resistance is a major obstacle of head and neck squamous cell carcinoma (HNSCC) therapy, limiting treatment success and patient survival. The aim of our experiments was to identify irradiation-regulated proteins as potential drug targets. Two established HNSCC cell lines (HNSCCUM-01T and HNSCCUM-02T) were treated with a single 8Gy (Gray) fraction of irradiation. Changes in cellular protein expression were studied after 24h by means of 2D-electrophoresis and MALDI-TOF-mass spectrometry. Ninety-four differentially expressed proteins were identified. The expression levels of four proteins were regulated similarly in both cell lines after irradiation treatment, i.e., GRP78, PRDX, ACTC, and the heterogeneous nuclear ribonucleoprotein K (hnRNPK), suggesting a relevant role during irradiation response. hnRNPK as a p53 interacting protein was verified by Western blotting and immunocytochemical staining as well as functionally analyzed. Knock-down by the use of siRNA resulted in only slightly reduced viability, however, migratory activity was strongly reduced. Combined application of siRNA against hnRNPK and irradiation reduced migration almost completely. We conclude that hnRNPK is potentially implicated in the radiogenic response of HNSCC. The inhibition of hnRNPK might reduce the metastasizing potential of HNSCC especially in combination with irradiation and suggest that this molecule should be further evaluated in this context. BIOLOGICAL SIGNIFICANCE We showed completely impaired migration of irradiated hnRNPK-knock-out HNSCC cells, suggesting this molecule as a potential drug target in combined treatment schedules.
Collapse
Affiliation(s)
- Judith Strozynski
- Molecular Tumor Biology, Department of Otorhinolaryngology, Head and Neck Surgery, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Julia Heim
- Molecular Tumor Biology, Department of Otorhinolaryngology, Head and Neck Surgery, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Sacarin Bunbanjerdsuk
- Molecular Tumor Biology, Department of Otorhinolaryngology, Head and Neck Surgery, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Nadine Wiesmann
- Molecular Tumor Biology, Department of Otorhinolaryngology, Head and Neck Surgery, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Lea Zografidou
- Molecular Tumor Biology, Department of Otorhinolaryngology, Head and Neck Surgery, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Simone Katharina Becker
- Molecular Tumor Biology, Department of Otorhinolaryngology, Head and Neck Surgery, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Anna-Maria Meierl
- Molecular Tumor Biology, Department of Otorhinolaryngology, Head and Neck Surgery, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Haralampos Gouveris
- Molecular Tumor Biology, Department of Otorhinolaryngology, Head and Neck Surgery, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Hartmut Lüddens
- Molecular Psychopharmacology, Department of Psychiatry, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Franz Grus
- Experimental Ophthalmology, Dept. of Ophthalmology, University of Mainz, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Jürgen Brieger
- Molecular Tumor Biology, Department of Otorhinolaryngology, Head and Neck Surgery, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany.
| |
Collapse
|
42
|
Almeida LO, Garcia CB, Matos-Silva FA, Curti C, Leopoldino AM. Accumulated SET protein up-regulates and interacts with hnRNPK, increasing its binding to nucleic acids, the Bcl-xS repression, and cellular proliferation. Biochem Biophys Res Commun 2014; 445:196-202. [PMID: 24508256 DOI: 10.1016/j.bbrc.2014.01.175] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2014] [Accepted: 01/28/2014] [Indexed: 12/11/2022]
Abstract
SET and hnRNPK are proteins involved in gene expression and regulation of cellular signaling. We previously demonstrated that SET accumulates in head and neck squamous cell carcinoma (HNSCC); hnRNPK is a prognostic marker in cancer. Here, we postulate that SET and hnRNPK proteins interact to promote tumorigenesis. We performed studies in HEK293 and HNSCC (HN6, HN12, and HN13) cell lines with SET/hnRNPK overexpression and knockdown, respectively. We found that SET and/or hnRNPK protein accumulation increased cellular proliferation. SET accumulation up-regulated hnRNPK mRNA and total/phosphorylated protein, promoted hnRNPK nuclear location, and reduced Bcl-x mRNA levels. SET protein directly interacted with hnRNPK, increasing both its binding to nucleic acids and Bcl-xS repression. We propose that hnRNPK should be a new target of SET and that SET-hnRNPK interaction, in turn, has potential implications in cell survival and malignant transformation.
Collapse
Affiliation(s)
- Luciana O Almeida
- Department of Clinical Analyses, Toxicology and Food Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Cristiana B Garcia
- Department of Clinical Analyses, Toxicology and Food Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Flavia A Matos-Silva
- Department of Clinical Analyses, Toxicology and Food Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Carlos Curti
- Department of Physics and Chemistry, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Andréia M Leopoldino
- Department of Clinical Analyses, Toxicology and Food Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil.
| |
Collapse
|
43
|
Kaur J, Matta A, Kak I, Srivastava G, Assi J, Leong I, Witterick I, Colgan TJ, Macmillan C, Siu KWM, Walfish PG, Ralhan R. S100A7 overexpression is a predictive marker for high risk of malignant transformation in oral dysplasia. Int J Cancer 2013; 134:1379-88. [PMID: 24122701 DOI: 10.1002/ijc.28473] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2012] [Revised: 08/10/2013] [Accepted: 08/21/2013] [Indexed: 12/14/2022]
Abstract
Early detection of oral lesions (OLs) at high risk of cancer development is of utmost importance for intervention. There is an urgent unmet clinical need for biomarkers that allow identification of high-risk OLs. Recently, we identified and verified a panel of five candidate protein biomarkers namely S100A7, prothymosin alpha, 14-3-3ζ, 14-3-3σ and heterogeneous nuclear ribonucleoprotein K using proteomics to distinguish OLs with dysplasia and oral cancers from normal oral tissues. The objective of our study was to evaluate the potential of these candidate protein biomarkers for identification of oral dysplastic lesions at high risk of cancer development. Using immunohistochemistry, we analyzed expressions of these five candidate protein biomarkers in 110 patients with biopsy-proven oral dysplasia and known clinical outcome and determined their correlations with p16 expression and HPV 16/18 status. Kaplan-Meier survival analysis showed reduced oral cancer-free survival (OCFS) of 68.6 months (p = 0.007) in patients showing cytoplasmic S100A7 overexpression when compared to patients with weak or no S100A7 immunostaining in cytoplasm (mean OCFS = 122.8 months). Multivariate Cox regression analysis revealed cytoplasmic S100A7 overexpression as the most significant candidate marker associated with cancer development in dysplastic lesions (p = 0.041, hazard ratio = 2.36). In conclusion, our study suggested the potential of S100A7 overexpression in identifying OLs with dysplasia at high risk of cancer development.
Collapse
Affiliation(s)
- Jatinder Kaur
- Alex and Simona Shnaider Laboratory in Molecular Oncology, Mount Sinai Hospital, Joseph & Wolf Lebovic Health Complex, Toronto, ON, Canada
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
44
|
Mikula M, Bomsztyk K, Goryca K, Chojnowski K, Ostrowski J. Heterogeneous nuclear ribonucleoprotein (HnRNP) K genome-wide binding survey reveals its role in regulating 3'-end RNA processing and transcription termination at the early growth response 1 (EGR1) gene through XRN2 exonuclease. J Biol Chem 2013; 288:24788-98. [PMID: 23857582 DOI: 10.1074/jbc.m113.496679] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
The heterogeneous nuclear ribonucleoprotein K (hnRNPK) is a nucleic acid-binding protein that acts as a docking platform integrating signal transduction pathways to nucleic acid-related processes. Given that hnRNPK could be involved in other steps that compose gene expression the definition of its genome-wide occupancy is important to better understand its role in transcription and co-transcriptional processes. Here, we used chromatin immunoprecipitation followed by deep sequencing (ChIP-Seq) to analyze the genome-wide hnRNPK-DNA interaction in colon cancer cell line HCT116. 9.1/3.6 and 7.0/3.4 million tags were sequenced/mapped, then 1809 and 642 hnRNPK binding sites were detected in quiescent and 30-min serum-stimulated cells, respectively. The inspection of sequencing tracks revealed inducible hnRNPK recruitment along a number of immediate early gene loci, including EGR1 and ZFP36, with the highest densities present at the transcription termination sites. Strikingly, hnRNPK knockdown with siRNA resulted in increased pre-RNA levels transcribed downstream of the EGR1 polyadenylation (A) site suggesting altered 3'-end pre-RNA degradation. Further ChIP survey of hnRNPK knockdown uncovered decreased recruitment of the 5'-3' exonuclease XRN2 along EGR1 and downstream of the poly(A) signal without altering RNA polymerase II density at these sites. Immunoprecipitation of hnRNPK and XRN2 from intact and RNase A-treated nuclear extracts followed by shotgun mass spectrometry revealed the presence of hnRNPK and XRN2 in the same complexes along with other spliceosome-related proteins. Our data suggest that hnRNPK may play a role in recruitment of XRN2 to gene loci thus regulating coupling 3'-end pre-mRNA processing to transcription termination.
Collapse
Affiliation(s)
- Michal Mikula
- Department of Genetics, Maria Sklodowska-Curie Memorial Cancer Center and Institute of Oncology, 02-781 Warsaw, Poland.
| | | | | | | | | |
Collapse
|
45
|
|