1
|
Shang C, Lai J, Haque M, Chen W, Wang P, Lai R. Nuclear NPM-ALK Protects Myc from Proteasomal Degradation and Contributes to Its High Expression in Cancer Stem-Like Cells in ALK-Positive Anaplastic Large Cell Lymphoma. Int J Mol Sci 2023; 24:14337. [PMID: 37762644 PMCID: PMC10531997 DOI: 10.3390/ijms241814337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Revised: 09/13/2023] [Accepted: 09/16/2023] [Indexed: 09/29/2023] Open
Abstract
In ALK-positive anaplastic large cell lymphoma (ALK+ALCL), a small subset of cancer stem-like (or RR) cells characterized by high Myc expression have been identified. We hypothesize that NPM-ALK contributes to their high Myc expression. While transfection of NPM-ALK into HEK293 cells effectively increased Myc by inhibiting its proteosomal degradation (PD-Myc), this effect was dramatically attenuated when the full-length NPM1 (FL-NPM1) was downregulated using shRNA, highlighting the importance of the NPM-ALK:FL-ALK heterodimers in this context. Consistent with this concept, immunoprecipitation experiments showed that the heterodimers are abundant only in RR cells, in which the half-life of Myc is substantially longer than the bulk cells. Fbw7γ, a key player in PD-Myc, is sequestered by the heterodimers in RR cells, and this finding correlates with a Myc phosphorylation pattern indicative of ineffective PD-Myc. Using confocal microscopy and immunofluorescence staining, we found that the fusion signal between ALK and FL-NPM1, characteristic of the heterodimers, correlates with the Myc level in ALK+ALCL cells from cell lines and patient samples. To conclude, our findings have revealed a novel oncogenic function of NPM-ALK in the nucleus. Specifically, the NPM-ALK:FL-NPM1 heterodimers increase cancer stemness by blocking PD-Myc and promoting Myc accumulation in the cancer stem-like cell subset.
Collapse
Affiliation(s)
- Chuquan Shang
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB T6G 2R3, Canada; (C.S.); (M.H.); (W.C.)
| | - Justine Lai
- Department of Medicine, Division of Hematology, University of Alberta, Edmonton, AB T6G 2R3, Canada; (J.L.); (P.W.)
| | - Moinul Haque
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB T6G 2R3, Canada; (C.S.); (M.H.); (W.C.)
- Department of Pathology, Yale School of Medicine, New Haven, CT 06510, USA
| | - Will Chen
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB T6G 2R3, Canada; (C.S.); (M.H.); (W.C.)
| | - Peng Wang
- Department of Medicine, Division of Hematology, University of Alberta, Edmonton, AB T6G 2R3, Canada; (J.L.); (P.W.)
- Department of Oncology, Cross Cancer Institute, Edmonton, AB T6G 1Z2, Canada
| | - Raymond Lai
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB T6G 2R3, Canada; (C.S.); (M.H.); (W.C.)
- Department of Oncology, Cross Cancer Institute, Edmonton, AB T6G 1Z2, Canada
| |
Collapse
|
2
|
Wang D, Li Y, Liu Y, Cheng S, Liu F, Zuo R, Ding C, Shi S, Liu G. NPM1 promotes cell proliferation by targeting PRDX6 in colorectal cancer. Int J Biochem Cell Biol 2022; 147:106233. [PMID: 35659568 DOI: 10.1016/j.biocel.2022.106233] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Revised: 04/29/2022] [Accepted: 05/29/2022] [Indexed: 10/18/2022]
Abstract
Colorectal cancer is a malignant tumor that begins in the colorectal mucosal epithelium. NPM1 is a nucleolar phosphoprotein that has been linked to tumor progression in humans. NPM1 is significantly overexpressed in a variety of tumors, including colorectal cancer, but its role and mechanism in colorectal cancer remain unknown. Therefore, the purpose of this study was to discover the role of NPM1 in promoting colorectal cancer proliferation via PRDX6 and its molecular mechanism. NPM1 knockdown or overexpression inhibited or promoted the proliferation and cell cycle progression of HCT-116 and HT-29 colorectal cancer cells, respectively, according to our findings. Furthermore, NPM1 knockdown or overexpression increased or decreased intracellular ROS levels. Animal experiments revealed that NPM1 knockdown or overexpression inhibited or promoted the growth of colorectal cancer cells transplanted subcutaneously. NPM1 knockdown or overexpression reduced or increased PRDX6 expression and related enzyme activities, respectively, according to our findings. NPM1 formed a complex with CBX3 as evidenced by immunoprecipitation, and the double luciferase reporter gene assay confirmed that the CBX3-NPM1 complex promoted PRDX6 transcription. Our data support the role of NPM1 in promoting the proliferation of colorectal cancer, which may be accomplished by CBX3 promoting the expression of the antioxidant protein PRDX6 and thus inhibiting intracellular ROS levels. NPM1 and PRDX6 are potential colorectal cancer therapeutic targets.
Collapse
Affiliation(s)
- Dan Wang
- Institute of Gastrointestinal Oncology, School of Medicine, Xiamen University, Xiamen, Fujian 361102, China
| | - Yin Li
- Department of Medical Examination, Xiamen International Travel Healthcare Center, Xiamen 361000, Fujian, China
| | - Yanling Liu
- School of Pharmaceutical Sciences Xiamen University, Xiamen, Fujian 361102, China
| | - Shuyu Cheng
- Institute of Gastrointestinal Oncology, School of Medicine, Xiamen University, Xiamen, Fujian 361102, China
| | - Fan Liu
- Department of Basic Medicine, Medical College of Xiamen University, Xiamen, Fujian 361002, China
| | - Renjie Zuo
- Institute of Gastrointestinal Oncology, School of Medicine, Xiamen University, Xiamen, Fujian 361102, China
| | - Chenchun Ding
- Institute of Gastrointestinal Oncology, School of Medicine, Xiamen University, Xiamen, Fujian 361102, China
| | - Songlin Shi
- Department of Basic Medicine, Medical College of Xiamen University, Xiamen, Fujian 361002, China.
| | - Guoyan Liu
- Department of Gastrointestinal Surgery, Zhongshan Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, Fujian 361002, China; Institute of Gastrointestinal Oncology, School of Medicine, Xiamen University, Xiamen, Fujian 361102, China; School of Pharmaceutical Sciences Xiamen University, Xiamen, Fujian 361102, China.
| |
Collapse
|
3
|
Identification of gene signatures for COAD using feature selection and Bayesian network approaches. Sci Rep 2022; 12:8761. [PMID: 35610288 PMCID: PMC9130243 DOI: 10.1038/s41598-022-12780-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Accepted: 05/03/2022] [Indexed: 12/13/2022] Open
Abstract
The combination of TCGA and GTEx databases will provide more comprehensive information for characterizing the human genome in health and disease, especially for underlying the cancer genetic alterations. Here we analyzed the gene expression profile of COAD in both tumor samples from TCGA and normal colon tissues from GTEx. Using the SNR-PPFS feature selection algorithms, we discovered a 38 gene signatures that performed well in distinguishing COAD tumors from normal samples. Bayesian network of the 38 genes revealed that DEGs with similar expression patterns or functions interacted more closely. We identified 14 up-DEGs that were significantly correlated with tumor stages. Cox regression analysis demonstrated that tumor stage, STMN4 and FAM135B dysregulation were independent prognostic factors for COAD survival outcomes. Overall, this study indicates that using feature selection approaches to select key gene signatures from high-dimensional datasets can be an effective way for studying cancer genomic characteristics.
Collapse
|
4
|
Gene Expression Profiling of Mycosis Fungoides in Early and Tumor Stage-A Proof-of-Concept Study Using Laser Capture/Single Cell Microdissection and NanoString Analysis. Cells 2021; 10:cells10113190. [PMID: 34831413 PMCID: PMC8621072 DOI: 10.3390/cells10113190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 11/02/2021] [Accepted: 11/08/2021] [Indexed: 11/17/2022] Open
Abstract
A subset of patients with mycosis fungoides (MF) progress to the tumor stage, which correlates with a worse clinical outcome. The molecular events driving this progression are not well-understood. To identify the key molecular drivers, we performed gene expression profiling (GEP) using NanoString. Ten formalin-fixed/paraffin-embedded skin biopsies from six patients (six non-tumor and four tumor MF) were included; non-tumor and tumor samples were available in three patients. Laser capture/single cell microdissection of epidermotropic MF cells was used for non-tumor cases. We found that the RNA extracted from 700-800 single cells was consistently sufficient for GEP, provided that multiplexed target enrichment amplification was used. An un-supervised/hierarchical analysis revealed clustering of non-tumor and tumor cases. Many of the most upregulated or downregulated genes are implicated in the PI3K, RAS, cell cycle/apoptosis and MAPK pathways. Two of the targets, HMGA1 and PTPN11 (encodes SHP2), were validated using immunohistochemistry. HMGA1 was positive in six out of six non-tumor MF samples and negative in five out of five tumor MF samples. An opposite pattern was seen with SHP2. Our study has provided a proof-of-concept that single-cell microdissection/GEP can be applied to archival tissues. Some of our identified gene targets might be key drivers of the disease progression of MF.
Collapse
|
5
|
Wang L, Yang B, Xu Z, Song X, Gong Z, Xue S, Kong L. NRF1-regulated CircNSUN2 promotes lymphoma progression through activating Wnt signaling pathway via stabilizing HMGA1. Cell Cycle 2021; 20:819-828. [PMID: 33858292 DOI: 10.1080/15384101.2021.1897272] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Lymphoma is the malignant tumor in the lymphatic system. Circular RNAs (circRNAs) are non-coding RNAs with closed structure, which have been reported to perform critical functions in various tumor progressions. However, the role of circNSUN2 in lymphoma has not been well explored. Quantitative reverse transcription real-time polymerase chain reaction (RT-qPCR) assay was performed to test the expression of circNSUN2 in malignant lymphoma tissues and normal lymph tissues, as well as in human peripheral blood lymphocyte cell line and malignant lymphoma cell lines. Cell counting kit-8 (CCK-8) assay and Transwell assays were used to evaluate the function of circNSUN2 on lymphoma cell proliferation, migration and invasion. DNA pull-down assay, chromatin immunoprecipitation (ChIP) and luciferase reporter assay were employed to test the interaction between circNSUN2 and NRF1. TOP/FOP flash reporter assay was performed to detect influence of circNSUN2 on Wnt pathway. Luciferase reporter assay and RNA pull-down assay were performed to explore interaction between HMGA1 and circNSUN2 through Wnt pathway. CircNSUN2 expression was abnormally high in malignant lymphoma tissues and cell lines. CircNSUN2 inhibition could reduce proliferation and invasion of lymphoma. Bioinformatic analysis, DNA pull-down, ChIP and luciferase reporter experiments confirmed that circNSUN2 could be modulated by transcription factor NRF1. Through RT-qPCR, western blot and luciferase reporter assays, circNSUN2 was proved to influence Wnt pathway by modulating HMGA1. CircNSUN2 regulated by transcription factor NRF1 could promote lymphoma progression through activating Wnt pathway via stabilizing HMGA1.[Figure: see text].
Collapse
Affiliation(s)
- Lifu Wang
- Department of Pathology, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Bo Yang
- Department of Medical Detection, The Third Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Ziguang Xu
- Department of Pathology, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Xiaoxia Song
- Department of Pathology, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Zhiquan Gong
- Department of Pathology, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Shuang Xue
- Department of Pathology, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Lingfei Kong
- Department of Pathology, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan, China
| |
Collapse
|
6
|
Mohan CD, Rangappa S, Preetham HD, Chandra Nayaka S, Gupta VK, Basappa S, Sethi G, Rangappa KS. Targeting STAT3 signaling pathway in cancer by agents derived from Mother Nature. Semin Cancer Biol 2020; 80:157-182. [DOI: 10.1016/j.semcancer.2020.03.016] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 03/23/2020] [Accepted: 03/28/2020] [Indexed: 02/07/2023]
|
7
|
Chen Y, Hu J. Nucleophosmin1 (NPM1) abnormality in hematologic malignancies, and therapeutic targeting of mutant NPM1 in acute myeloid leukemia. Ther Adv Hematol 2020; 11:2040620719899818. [PMID: 32071709 PMCID: PMC6997955 DOI: 10.1177/2040620719899818] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Accepted: 12/18/2019] [Indexed: 01/07/2023] Open
Abstract
Nucleophosmin (NPM1) is an abundant nucleolar protein that is
implicated in a variety of biological processes and in the pathogenesis of
several human malignancies. For hematologic malignancies, approximately
one-third of anaplastic large-cell non-Hodgkin’s lymphomas were found to express
a fusion between NPM1 and the catalytic domain of anaplastic
lymphoma receptor tyrosine kinase. About 50–60% of acute myeloid leukemia
patients with normal karyotype carry NPM1 mutations, which are
characterized by cytoplasmic dislocation of the NPM1 protein.
Nevertheless, NPM1 is overexpressed in various hematologic and
solid tumor malignancies. NPM1 overexpression is considered a
prognostic marker of recurrence and progression of cancer. Thus,
NPM1 abnormalities play a critical role in several types of
hematologic malignancies. This has led to intense interest in the development of
an NPM1 targeting strategy for cancer therapy. The aim of this
review is to summarize present knowledge on NPM1 origin,
pathogenesis, and therapeutic interventions in hematologic malignancies.
Collapse
Affiliation(s)
- Yingyu Chen
- Department of Hematology, Fujian Institute of Hematology, Fujian Medical University Union Hospital, No.29 Xinquan Road, Fuzhou, Fujian 350001, China
| | - Jianda Hu
- Department of Hematology, Fujian Institute of Hematology, Fujian Medical University Union Hospital, Fuzhou, Fujian, China
| |
Collapse
|