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Saverino A, Qu X, Mendoza RG, Raha S, Manna D, Ermi AG, Subler MA, Windle JJ, Liu J, Sarkar D. Spatial Transcriptomics unravels palmitoylation and zonation-dependent gene regulation by AEG-1 in mouse liver. J Biol Chem 2024:107322. [PMID: 38677511 DOI: 10.1016/j.jbc.2024.107322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Revised: 04/10/2024] [Accepted: 04/16/2024] [Indexed: 04/29/2024] Open
Abstract
Obesity-induced metabolic dysfunction-associated steatohepatitis (MASH) leads to hepatocellular carcinoma (HCC). Astrocyte-elevated gene-1/Metadherin (AEG-1/MTDH) plays a key role in promoting MASH and HCC. AEG-1 is palmitoylated at residue cysteine 75 (Cys75) and a knock-in mouse representing mutated Cys75 to serine (AEG-1-C75S) showed activation of MASH- and HCC-promoting gene signature when compared to wild-type littermates (AEG-1-WT). The liver consists of 3 zones, periportal, midlobular and pericentral, and zone-specific dysregulated gene expression impairs metabolic homeostasis in the liver, contributing to MASH and HCC. Here, to elucidate how palmitoylation influences AEG-1-mediated gene regulation in regards to hepatic zonation, we performed spatial transcriptomics (ST) in the livers of AEG-1-WT and AEG-1-C75S littermates. ST identified six different clusters in livers and using zone- and cell type-specific markers we attributed specific zones and cell types to specific clusters. Ingenuity Pathway Analysis (IPA) of differentially expressed genes in each cluster unraveled activation of pro-inflammatory and MASH- and HCC-promoting pathways, mainly in periportal and pericentral hepatocytes, in AEG-1-C75S liver compared to AEG-1-WT. Interestingly, in AEG-1-C75S liver, the midlobular zone exhibited widespread inhibition of xenobiotic metabolism pathways and inhibition of PXR/RXR and LXR/RXR activation, vs AEG-1-WT. In conclusion, AEG-1-C75S mutant exhibited zone-specific differential gene expression, which might contribute to metabolic dysfunction and dysregulated drug metabolism leading to MASH and HCC.
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Affiliation(s)
| | | | | | | | | | | | | | - Jolene J Windle
- Department of Human and Molecular Genetics; Massey Comprehensive Cancer Center
| | - Jinze Liu
- Massey Comprehensive Cancer Center; Department of Biostatistics, Virginia Commonwealth University, Richmond, VA 23298, USA
| | - Devanand Sarkar
- Department of Human and Molecular Genetics; Massey Comprehensive Cancer Center; VCU Institute of Molecular Medicine, Virginia Commonwealth University, Richmond, VA 23298, USA.
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2
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Manna D, Reghupaty SC, Camarena MDC, Mendoza RG, Subler MA, Koblinski JE, Martin R, Dozmorov MG, Mukhopadhyay ND, Liu J, Qu X, Das SK, Lai Z, Windle JJ, Fisher PB, Sarkar D. Melanoma differentiation associated gene-9/syndecan binding protein promotes hepatocellular carcinoma. Hepatology 2023; 78:1727-1741. [PMID: 36120720 DOI: 10.1002/hep.32797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 09/13/2022] [Accepted: 09/15/2022] [Indexed: 12/08/2022]
Abstract
BACKGROUND AND AIMS The oncogene Melanoma differentiation associated gene-9/syndecan binding protein (MDA-9/SDCBP) is overexpressed in many cancers, promoting aggressive, metastatic disease. However, the role of MDA-9 in regulating hepatocellular carcinoma (HCC) has not been well studied. APPROACH AND RESULTS To unravel the function of MDA-9 in HCC, we generated and characterized a transgenic mouse with hepatocyte-specific overexpression of MDA-9 (Alb/MDA-9). Compared with wild-type (WT) littermates, Alb/MDA-9 mice demonstrated significantly higher incidence of N-nitrosodiethylamine/phenobarbital-induced HCC, with marked activation and infiltration of macrophages. RNA sequencing (RNA-seq) in naive WT and Alb/MDA-9 hepatocytes identified activation of signaling pathways associated with invasion, angiogenesis, and inflammation, especially NF-κB and integrin-linked kinase signaling pathways. In nonparenchymal cells purified from naive livers, single-cell RNA-seq showed activation of Kupffer cells and macrophages in Alb/MDA-9 mice versus WT mice. A robust increase in the expression of Secreted phosphoprotein 1 (Spp1/osteopontin) was observed upon overexpression of MDA-9. Inhibition of NF-κB pathway blocked MDA-9-induced Spp1 induction, and knock down of Spp1 resulted in inhibition of MDA-9-induced macrophage migration, as well as angiogenesis. CONCLUSIONS Alb/MDA-9 is a mouse model with MDA-9 overexpression in any tissue type. Our findings unravel an HCC-promoting role of MDA-9 mediated by NF-κB and Spp1 and support the rationale of using MDA-9 inhibitors as a potential treatment for aggressive HCC.
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Affiliation(s)
- Debashri Manna
- Department of Human and Molecular Genetics , Virginia Commonwealth University , Richmond , Virginia , USA
| | - Saranya Chidambaranathan Reghupaty
- C. Kenneth and Dianne Wright Center for Clinical and Translational Research , Virginia Commonwealth University , Richmond , Virginia , USA
| | - Maria Del Carmen Camarena
- C. Kenneth and Dianne Wright Center for Clinical and Translational Research , Virginia Commonwealth University , Richmond , Virginia , USA
| | - Rachel G Mendoza
- Department of Human and Molecular Genetics , Virginia Commonwealth University , Richmond , Virginia , USA
| | - Mark A Subler
- Department of Human and Molecular Genetics , Virginia Commonwealth University , Richmond , Virginia , USA
| | - Jennifer E Koblinski
- Massey Cancer Center , Virginia Commonwealth University , Richmond , Virginia , USA
- Department of Pathology , Virginia Commonwealth University , Richmond , Virginia , USA
| | - Rebecca Martin
- Massey Cancer Center , Virginia Commonwealth University , Richmond , Virginia , USA
- Department of Microbiology and Immunology , Virginia Commonwealth University , Richmond , Virginia , USA
| | - Mikhail G Dozmorov
- Department of Biostatistics , Virginia Commonwealth University , Richmond , Virginia , USA
| | - Nitai D Mukhopadhyay
- Department of Biostatistics , Virginia Commonwealth University , Richmond , Virginia , USA
| | - Jinze Liu
- Department of Biostatistics , Virginia Commonwealth University , Richmond , Virginia , USA
| | - Xufeng Qu
- Massey Cancer Center , Virginia Commonwealth University , Richmond , Virginia , USA
| | - Swadesh K Das
- Department of Human and Molecular Genetics , Virginia Commonwealth University , Richmond , Virginia , USA
- Massey Cancer Center , Virginia Commonwealth University , Richmond , Virginia , USA
- Virginia Commonwealth University Institute of Molecular Medicine (VIMM) , Virginia Commonwealth University , Richmond , Virginia , USA
| | - Zhao Lai
- Greehey Children's Cancer Research Institute , University of Texas Health Science Center San Antonio , San Antonio , Texas , USA
| | - Jolene J Windle
- Department of Human and Molecular Genetics , Virginia Commonwealth University , Richmond , Virginia , USA
- Massey Cancer Center , Virginia Commonwealth University , Richmond , Virginia , USA
- Virginia Commonwealth University Institute of Molecular Medicine (VIMM) , Virginia Commonwealth University , Richmond , Virginia , USA
| | - Paul B Fisher
- Department of Human and Molecular Genetics , Virginia Commonwealth University , Richmond , Virginia , USA
- Massey Cancer Center , Virginia Commonwealth University , Richmond , Virginia , USA
- Virginia Commonwealth University Institute of Molecular Medicine (VIMM) , Virginia Commonwealth University , Richmond , Virginia , USA
| | - Devanand Sarkar
- Department of Human and Molecular Genetics , Virginia Commonwealth University , Richmond , Virginia , USA
- Massey Cancer Center , Virginia Commonwealth University , Richmond , Virginia , USA
- Virginia Commonwealth University Institute of Molecular Medicine (VIMM) , Virginia Commonwealth University , Richmond , Virginia , USA
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3
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Reghupaty SC, Kanwal S, Mendoza RG, Davis E, Li H, Lai Z, Dozmorov MG, Faison MO, Siddiqui RA, Sarkar D. Dysregulation of Type I Interferon (IFN-I) Signaling: A Potential Contributor to Racial Disparity in Hepatocellular Carcinoma (HCC). Cancers (Basel) 2023; 15:4283. [PMID: 37686559 PMCID: PMC10486472 DOI: 10.3390/cancers15174283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 08/23/2023] [Accepted: 08/25/2023] [Indexed: 09/10/2023] Open
Abstract
African-American (AA)/Black hepatocellular carcinoma (HCC) patients have increased incidence and decreased survival rates compared to non-Hispanic (White) patients, the underlying molecular mechanism of which is not clear. Analysis of existing RNA-sequencing (RNA-seq) data in The Cancer Genome Atlas (TCGA) and in-house RNA-sequencing of 14 White and 18 AA/Black HCC patients revealed statistically significant activation of type I interferon (IFN-I) signaling pathway in AA/Black patients. A four-gene signature of IFN-stimulated genes (ISGs) showed increased expression in AA/Black HCC tumors versus White. HCC is a disease of chronic inflammation, and IFN-Is function as pro-inflammatory cytokines. We tested efficacy of ginger extract (GE), a dietary compound known for anti-inflammatory properties, on HCC cell lines derived from White (HepG2), AA/Black (Hep3B and O/20) and Asian (HuH-7) patients. GE exhibited a significantly lower IC50 on Hep3B and O/20 cells than on HepG2 and HuH-7 cells. The GE treatment inhibited the activation of downstream mediators of IFN-I signaling pathways and expression of ISGs in all four HCC cells. Our data suggest that ginger can potentially attenuate IFN-I-mediated signaling pathways in HCC, and cells from AA/Black HCC patients may be more sensitive to ginger. AA/Black HCC patients might benefit from a holistic diet containing ginger.
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Affiliation(s)
| | - Sadia Kanwal
- Food and Nutrition Science Laboratory, College of Agriculture, Virginia State University, Petersburg, VA 23806, USA; (S.K.); (H.L.)
| | - Rachel G. Mendoza
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, VA 23298, USA;
| | - Eva Davis
- Department of Microbiology and Immunology, Virginia Commonwealth University, Richmond, VA 23298, USA;
| | - Haiwen Li
- Food and Nutrition Science Laboratory, College of Agriculture, Virginia State University, Petersburg, VA 23806, USA; (S.K.); (H.L.)
| | - Zhao Lai
- Greehey Children’s Cancer Research Institute, University of Texas Health Science Center San Antonio, San Antonio, TX 78229, USA;
| | - Mikhail G. Dozmorov
- Department of Biostatistics and Pathology, Virginia Commonwealth University, Richmond, VA 23298, USA;
| | - Milton Omar Faison
- Department of Biology, Virginia State University, Petersburg, VA 23806, USA;
| | - Rafat Ali Siddiqui
- Food and Nutrition Science Laboratory, College of Agriculture, Virginia State University, Petersburg, VA 23806, USA; (S.K.); (H.L.)
| | - Devanand Sarkar
- Department of Human and Molecular Genetics, Massey Cancer Center, VCU Institute of Molecular Medicine (VIMM), Virginia Commonwealth University, Richmond, VA 23298, USA
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4
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Rajesh Y, Reghupaty SC, Mendoza RG, Manna D, Banerjee I, Subler MA, Weldon K, Lai Z, Giashuddin S, Fisher PB, Sanyal AJ, Martin RK, Dozmorov MG, Windle JJ, Sarkar D. Dissecting the Balance Between Metabolic and Oncogenic Functions of Astrocyte-Elevated Gene-1/Metadherin. Hepatol Commun 2022; 6:561-575. [PMID: 34741448 PMCID: PMC8870024 DOI: 10.1002/hep4.1834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 09/18/2021] [Accepted: 10/02/2021] [Indexed: 12/02/2022] Open
Abstract
Obesity is an enormous global health problem, and obesity-induced nonalcoholic steatohepatitis (NASH) is contributing to a rising incidence and mortality for hepatocellular carcinoma (HCC). Increase in de novo lipogenesis and decrease in fatty acid β-oxidation (FAO) underlie hepatic lipid accumulation in NASH. Astrocyte-elevated gene-1/metadherin (AEG-1) overexpression contributes to both NASH and HCC. AEG-1 harbors an LXXLL motif through which it blocks activation of peroxisome proliferator activated receptor α (PPARα), a key regulator of FAO. To better understand the role of LXXLL motif in mediating AEG-1 function, using clustered regularly interspaced short palindromic repeats (CRISPR)/Cas9 technology, we generated a mouse model (AEG-1-L24K/L25H) in which the LXXLL motif in AEG-1 was mutated to LXXKH. We observed increased activation of PPARα in AEG-1-L24K/L25H livers providing partial protection from high-fat diet-induced steatosis. Interestingly, even with equal gene dosage levels, compared with AEG-1-wild-type livers, AEG-1-L24K/L25H livers exhibited increase in levels of lipogenic enzymes, mitogenic activity and inflammation, which are attributes observed when AEG-1 is overexpressed. These findings indicate that while LXXLL motif favors steatotic activity of AEG-1, it keeps in check inflammatory and oncogenic functions, thus maintaining a homeostasis in AEG-1 function. AEG-1 is being increasingly appreciated as a viable target for ameliorating NASH and NASH-HCC, and as such, in-depth understanding of the functions and molecular attributes of this molecule is essential. Conclusion: The present study unravels the unique role of the LXXLL motif in mediating the balance between the metabolic and oncogenic functions of AEG-1.
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Affiliation(s)
- Yetirajam Rajesh
- Department of Human and Molecular GeneticsVirginia Commonwealth UniversityRichmondVAUSA
| | | | - Rachel G Mendoza
- Department of Human and Molecular GeneticsVirginia Commonwealth UniversityRichmondVAUSA
| | - Debashri Manna
- Department of Human and Molecular GeneticsVirginia Commonwealth UniversityRichmondVAUSA
| | - Indranil Banerjee
- Department of Human and Molecular GeneticsVirginia Commonwealth UniversityRichmondVAUSA
| | - Mark A Subler
- Department of Human and Molecular GeneticsVirginia Commonwealth UniversityRichmondVAUSA
| | - Korri Weldon
- Greehey Children's Cancer Research InstituteUniversity of Texas Health Science Center San AntonioSan AntonioTXUSA
| | - Zhao Lai
- Greehey Children's Cancer Research InstituteUniversity of Texas Health Science Center San AntonioSan AntonioTXUSA
| | - Shah Giashuddin
- Department of Pathology and Laboratory MedicineNew York Presbyterian Health System at Weill Cornell Medical CollegeNew YorkNYUSA
| | - Paul B Fisher
- Department of Human and Molecular GeneticsVirginia Commonwealth UniversityRichmondVAUSA.,Massey Cancer CenterVirginia Commonwealth UniversityRichmondVAUSA.,VCU Institute of Molecular MedicineVirginia Commonwealth UniversityRichmondVAUSA
| | - Arun J Sanyal
- Department of Internal MedicineVirginia Commonwealth UniversityRichmondVAUSA
| | - Rebecca K Martin
- Department of Microbiology and ImmunologyVirginia Commonwealth UniversityRichmondVAUSA
| | - Mikhail G Dozmorov
- Department of BiostatisticsVirginia Commonwealth UniversityRichmondVAUSA
| | - Jolene J Windle
- Department of Human and Molecular GeneticsVirginia Commonwealth UniversityRichmondVAUSA.,Massey Cancer CenterVirginia Commonwealth UniversityRichmondVAUSA
| | - Devanand Sarkar
- Department of Human and Molecular GeneticsVirginia Commonwealth UniversityRichmondVAUSA.,Massey Cancer CenterVirginia Commonwealth UniversityRichmondVAUSA.,VCU Institute of Molecular MedicineVirginia Commonwealth UniversityRichmondVAUSA
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5
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Jariwala N, Mendoza RG, Garcia D, Lai Z, Subler MA, Windle JJ, Mukhopadhyay ND, Fisher PB, Chen Y, Sarkar D. Posttranscriptional Inhibition of Protein Tyrosine Phosphatase Nonreceptor Type 23 by Staphylococcal Nuclease and Tudor Domain Containing 1: Implications for Hepatocellular Carcinoma. Hepatol Commun 2019; 3:1258-1270. [PMID: 31497746 PMCID: PMC6719750 DOI: 10.1002/hep4.1400] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Accepted: 06/16/2019] [Indexed: 01/12/2023] Open
Abstract
Oncoprotein staphylococcal nuclease and tudor domain containing 1 (SND1) regulates gene expression at a posttranscriptional level in multiple cancers, including hepatocellular carcinoma (HCC). Staphylococcal nuclease (SN) domains of SND1 function as a ribonuclease (RNase), and the tudor domain facilitates protein–oligonucleotide interaction. In the present study, we aimed to identify RNA interactome of SND1 to obtain enhanced insights into gene regulation by SND1. RNA interactome was identified by immunoprecipitation (IP) of RNA using anti‐SND1 antibody from human HCC cells followed by RNA immunoprecipitation sequencing (RIP‐Seq). Among RNA species that showed more than 10‐fold enrichment over the control, we focused on the tumor suppressor protein tyrosine phosphatase nonreceptor type 23 (PTPN23) because its regulation by SND1 and its role in HCC are not known. PTPN23 levels were down‐regulated in human HCC cells versus normal hepatocytes and in human HCC tissues versus normal adjacent liver, as revealed by immunohistochemistry. In human HCC cells, knocking down SND1 increased and overexpression of SND1 decreased PTPN23 protein. RNA binding and degradation assays revealed that SND1 binds to and degrades the 3′‐untranslated region (UTR) of PTPN23 messenger RNA (mRNA). Tetracycline‐inducible PTPN23 overexpression in human HCC cells resulted in significant inhibition in proliferation, migration, and invasion and in vivo tumorigenesis. PTPN23 induction caused inhibition in activation of tyrosine‐protein kinase Met (c‐Met), epidermal growth factor receptor (EGFR), Src, and focal adhesion kinase (FAK), suggesting that, as a putative phosphatase, PTPN23 inhibits activation of these oncogenic kinases. Conclusion: PTPN23 is a novel target of SND1, and our findings identify PTPN23 as a unique tumor suppressor for HCC. PTPN23 might function as a homeostatic regulator of multiple kinases, restraining their activation.
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Affiliation(s)
- Nidhi Jariwala
- Department of Human and Molecular Genetics Virginia Commonwealth University Richmond VA
| | - Rachel G Mendoza
- Department of Human and Molecular Genetics Virginia Commonwealth University Richmond VA
| | - Dawn Garcia
- Greehey Children's Cancer Research Institute University of Texas Health Science Center San Antonio San Antonio TX
| | - Zhao Lai
- Greehey Children's Cancer Research Institute University of Texas Health Science Center San Antonio San Antonio TX
| | - Mark A Subler
- Department of Human and Molecular Genetics Virginia Commonwealth University Richmond VA
| | - Jolene J Windle
- Department of Human and Molecular Genetics Virginia Commonwealth University Richmond VA.,Massey Cancer Center Virginia Commonwealth University Richmond VA
| | | | - Paul B Fisher
- Department of Human and Molecular Genetics Virginia Commonwealth University Richmond VA.,Massey Cancer Center Virginia Commonwealth University Richmond VA.,Virginia Commonwealth University Institute of Molecular Medicine Virginia Commonwealth University Richmond VA
| | - Yidong Chen
- Greehey Children's Cancer Research Institute University of Texas Health Science Center San Antonio San Antonio TX.,Department of Epidemiology and Biostatistics University of Texas Health Science Center San Antonio San Antonio TX
| | - Devanand Sarkar
- Department of Human and Molecular Genetics Virginia Commonwealth University Richmond VA.,Massey Cancer Center Virginia Commonwealth University Richmond VA.,Virginia Commonwealth University Institute of Molecular Medicine Virginia Commonwealth University Richmond VA
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6
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Robertson CL, Mendoza RG, Jariwala N, Dozmorov M, Mukhopadhyay ND, Subler MA, Windle JJ, Lai Z, Fisher PB, Ghosh S, Sarkar D. Astrocyte Elevated Gene-1 Regulates Macrophage Activation in Hepatocellular Carcinogenesis. Cancer Res 2018; 78:6436-6446. [PMID: 30181179 PMCID: PMC6239947 DOI: 10.1158/0008-5472.can-18-0659] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Revised: 07/25/2018] [Accepted: 08/28/2018] [Indexed: 01/22/2023]
Abstract
Chronic inflammation is a known hallmark of cancer and is central to the onset and progression of hepatocellular carcinoma (HCC). Hepatic macrophages play a critical role in the inflammatory process leading to HCC. The oncogene Astrocyte elevated gene-1 (AEG-1) regulates NFκB activation, and germline knockout of AEG-1 in mice (AEG-1-/-) results in resistance to inflammation and experimental HCC. In this study, we developed conditional hepatocyte- and myeloid cell-specific AEG-1-/- mice (AEG-1ΔHEP and AEG-1ΔMAC, respectively) and induced HCC by treatment with N-nitrosodiethylamine (DEN) and phenobarbital (PB). AEG-1ΔHEP mice exhibited a significant reduction in disease severity compared with control littermates, while AEG-1ΔMAC mice were profoundly resistant. In vitro, AEG-1-/- hepatocytes exhibited increased sensitivity to stress and senescence. Notably, AEG-1-/- macrophages were resistant to either M1 or M2 differentiation with significant inhibition in migration, endothelial adhesion, and efferocytosis activity, indicating that AEG-1 ablation renders macrophages functionally anergic. These results unravel a central role of AEG-1 in regulating macrophage activation and indicate that AEG-1 is required in both tumor cells and tumor microenvironment to stimulate hepatocarcinogenesis.Significance: These findings distinguish a novel role of macrophage-derived oncogene AEG-1 from hepatocellular AEG-1 in promoting inflammation and driving tumorigenesis. Cancer Res; 78(22); 6436-46. ©2018 AACR.
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Affiliation(s)
- Chadia L Robertson
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, Virginia
| | - Rachel G Mendoza
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, Virginia
| | - Nidhi Jariwala
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, Virginia
| | - Mikhail Dozmorov
- Department of Biostatistics, Virginia Commonwealth University, Richmond, Virginia
- Massey Cancer Center, Virginia Commonwealth University, Richmond, Virginia
| | - Nitai D Mukhopadhyay
- Department of Biostatistics, Virginia Commonwealth University, Richmond, Virginia
- Massey Cancer Center, Virginia Commonwealth University, Richmond, Virginia
| | - Mark A Subler
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, Virginia
| | - Jolene J Windle
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, Virginia
- Massey Cancer Center, Virginia Commonwealth University, Richmond, Virginia
| | - Zhao Lai
- Greehey Children's Cancer Research Institute, University of Texas Health Science Center San Antonio, San Antonio, Texas
| | - Paul B Fisher
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, Virginia
- Massey Cancer Center, Virginia Commonwealth University, Richmond, Virginia
- VCU Institute of Molecular Medicine (VIMM), Virginia Commonwealth University, Richmond, Virginia
| | - Shobha Ghosh
- Department of Internal Medicine, Virginia Commonwealth University, Richmond, Virginia
| | - Devanand Sarkar
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, Virginia.
- Massey Cancer Center, Virginia Commonwealth University, Richmond, Virginia
- VCU Institute of Molecular Medicine (VIMM), Virginia Commonwealth University, Richmond, Virginia
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7
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Jariwala NH, Mendoza RG, Dawn G, Zhao L, Subler MA, Windle JJ, Fisher PB, Yidong C, Sarkar D. Abstract 4445: Post-transcriptional inhibition of PTPN23 by SND1: Potential mechanism for hepatocellular carcinoma. Cancer Res 2018. [DOI: 10.1158/1538-7445.am2018-4445] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Oncoprotein SND1 regulates gene expression at a post-transcriptional level in multiple cancers including hepatocellular carcinoma (HCC). Staphylococcal nuclease domains of SND1 function as an RNAse and tudor domain facilitates protein-oligonucleotide interaction. In the present study, we aimed to identify RNA interactome of SND1 to obtain better insights into gene regulation by SND1. RNA interactome was identified by immunoprecipitation of RNA using anti-SND1 antibody from human HCC cells followed by RNA-sequencing (RIP-Seq). With an adjusted p value of <0.01 and >2-fold enrichment over control, 282 mRNAs were identified to significantly associate with SND1 protein. We focused on the tumor suppressor PTPN23 because its regulation by SND1 and its role in HCC are not known. PTPN23 levels were downregulated in human HCC cells versus normal hepatocytes and in human HCC tissues versus normal adjacent liver as revealed by immunohistochemistry. In human HCC cells, knocking down SND1 increased and overexpression of SND1 decreased PTPN23 protein. RNA binding and degradation assays revealed that SND1 specifically binds to and degrades 3'-UTR of PTPN23 mRNA. Tetracycline-inducible PTPN23 overexpression in human HCC cells resulted in significant inhibition in proliferation, migration and invasion and in vivo tumorigenesis. PTPN23 induction caused inhibition in activation of c-Met, EGFR, Src and FAK, suggesting that as a phosphatase PTPN23 inhibits activation of these oncogenic kinases. The present study unravels a novel function of SND1 in targeting PTPN23 and identifies PTPN23 as a unique tumor suppressor for HCC. PTPN23 might function as a homeostatic regulator of multiple kinases restraining their activation.
Citation Format: Nidhi H. Jariwala, Rachel G. Mendoza, Garcia Dawn, Lai Zhao, Mark A. Subler, Jolene J. Windle, Paul B. Fisher, Chen Yidong, Devanand Sarkar. Post-transcriptional inhibition of PTPN23 by SND1: Potential mechanism for hepatocellular carcinoma [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2018; 2018 Apr 14-18; Chicago, IL. Philadelphia (PA): AACR; Cancer Res 2018;78(13 Suppl):Abstract nr 4445.
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Affiliation(s)
| | | | - Garcia Dawn
- 2University of Texas Health Science Center, San Antonio, TX
| | - Lai Zhao
- 2University of Texas Health Science Center, San Antonio, TX
| | | | | | | | - Chen Yidong
- 2University of Texas Health Science Center, San Antonio, TX
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8
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Akiel M, Guo C, Li X, Rajasekaran D, Mendoza RG, Robertson CL, Jariwala N, Yuan F, Subler MA, Windle J, Garcia DK, Lai Z, Chen HIH, Chen Y, Giashuddin S, Fisher PB, Wang XY, Sarkar D. IGFBP7 Deletion Promotes Hepatocellular Carcinoma. Cancer Res 2017; 77:4014-4025. [PMID: 28619711 DOI: 10.1158/0008-5472.can-16-2885] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2016] [Revised: 03/17/2017] [Accepted: 06/05/2017] [Indexed: 01/03/2023]
Abstract
Activation of IGF signaling is a major oncogenic event in diverse cancers, including hepatocellular carcinoma (HCC). In this setting, the insulin-like growth factor binding protein IGFBP7 inhibits IGF signaling by binding the IGF1 receptor (IGF1R), functioning as a candidate tumor suppressor. IGFBP7 abrogates tumors by inhibiting angiogenesis and inducing cancer-specific senescence and apoptosis. Here, we report that Igfbp7-deficient mice exhibit constitutively active IGF signaling, presenting with proinflammatory and immunosuppressive microenvironments and spontaneous liver and lung tumors occurring with increased incidence in carcinogen-treated subjects. Igfbp7 deletion increased proliferation and decreased senescence of hepatocytes and mouse embryonic fibroblasts, effects that were blocked by treatment with IGF1 receptor inhibitor. Significant inhibition of genes regulating immune surveillance was observed in Igfbp7-/- murine livers, which was associated with a marked inhibition in antigen cross-presentation by Igfbp7-/- dendritic cells. Conversely, IGFBP7 overexpression inhibited growth of HCC cells in syngeneic immunocompetent mice. Depletion of CD4+ or CD8+ T lymphocytes abolished this growth inhibition, identifying it as an immune-mediated response. Our findings define an immune component of the pleiotropic mechanisms through which IGFBP7 suppresses HCC. Furthermore, they offer a genetically based preclinical proof of concept for IGFBP7 as a therapeutic target for immune management of HCC. Cancer Res; 77(15); 4014-25. ©2017 AACR.
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Affiliation(s)
- Maaged Akiel
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, Virginia
| | - Chunqing Guo
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, Virginia
| | - Xia Li
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, Virginia
| | - Devaraja Rajasekaran
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, Virginia
| | - Rachel G Mendoza
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, Virginia
| | - Chadia L Robertson
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, Virginia
| | - Nidhi Jariwala
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, Virginia
| | - Fang Yuan
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, Virginia
| | - Mark A Subler
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, Virginia
| | - Jolene Windle
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, Virginia
| | - Dawn K Garcia
- Greehey Children's Cancer Research Institute, Virginia Commonwealth University, Richmond, Virginia
| | - Zhao Lai
- Greehey Children's Cancer Research Institute, Virginia Commonwealth University, Richmond, Virginia
| | - Hung-I Harry Chen
- Greehey Children's Cancer Research Institute, Virginia Commonwealth University, Richmond, Virginia
| | - Yidong Chen
- Greehey Children's Cancer Research Institute, Virginia Commonwealth University, Richmond, Virginia.,Department of Epidemiology and Biostatistics, University of Texas Health Science Center San Antonio, San Antonio, Texas
| | - Shah Giashuddin
- Department of Pathology, New York Presbyterian Health System at Weill Cornell Medical College, New York, New York
| | - Paul B Fisher
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, Virginia.,VCUMassey Cancer Center, Virginia Commonwealth University, Richmond, Virginia.,VCU Institute of Molecular Medicine (VIMM), Virginia Commonwealth University, Richmond, Virginia
| | - Xiang-Yang Wang
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, Virginia.,VCUMassey Cancer Center, Virginia Commonwealth University, Richmond, Virginia.,VCU Institute of Molecular Medicine (VIMM), Virginia Commonwealth University, Richmond, Virginia
| | - Devanand Sarkar
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, Virginia. .,VCUMassey Cancer Center, Virginia Commonwealth University, Richmond, Virginia.,VCU Institute of Molecular Medicine (VIMM), Virginia Commonwealth University, Richmond, Virginia
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9
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Jariwala N, Rajasekaran D, Mendoza RG, Shen XN, Siddiq A, Akiel MA, Robertson CL, Subler MA, Windle JJ, Fisher PB, Sanyal AJ, Sarkar D. Oncogenic Role of SND1 in Development and Progression of Hepatocellular Carcinoma. Cancer Res 2017; 77:3306-3316. [PMID: 28428278 DOI: 10.1158/0008-5472.can-17-0298] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Revised: 03/29/2017] [Accepted: 04/14/2017] [Indexed: 12/22/2022]
Abstract
SND1, a subunit of the miRNA regulatory complex RISC, has been implicated as an oncogene in hepatocellular carcinoma (HCC). In this study, we show that hepatocyte-specific SND1 transgenic mice (Alb/SND1 mice) develop spontaneous HCC with partial penetrance and exhibit more highly aggressive HCC induced by chemical carcinogenesis. Livers from Alb/SND1 mice exhibited a relative increase in inflammatory markers and spheroid-generating tumor-initiating cells (TIC). Mechanistic investigations defined roles for Akt and NF-κB signaling pathways in promoting TIC formation in Alb/SND1 mice. In human xenograft models of subcutaneous or orthotopic HCC, administration of the selective SND1 inhibitor 3', 5'-deoxythymidine bisphosphate (pdTp), inhibited tumor formation without effects on body weight or liver function. Our work establishes an oncogenic role for SND1 in promoting TIC formation and highlights pdTp as a highly selective SND1 inhibitor as a candidate therapeutic lead to treat advanced HCC. Cancer Res; 77(12); 3306-16. ©2017 AACR.
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Affiliation(s)
- Nidhi Jariwala
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, Virginia
| | - Devaraja Rajasekaran
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, Virginia
| | - Rachel G Mendoza
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, Virginia
| | - Xue-Ning Shen
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, Virginia
| | - Ayesha Siddiq
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, Virginia
| | - Maaged A Akiel
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, Virginia
| | - Chadia L Robertson
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, Virginia
| | - Mark A Subler
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, Virginia
| | - Jolene J Windle
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, Virginia
| | - Paul B Fisher
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, Virginia.,VCU Massey Cancer Center, Virginia Commonwealth University, Richmond, Virginia.,VCU Institute of Molecular Medicine (VIMM), Virginia Commonwealth University, Richmond, Virginia
| | - Arun J Sanyal
- Department of Internal Medicine, Virginia Commonwealth University, Richmond, Virginia
| | - Devanand Sarkar
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, Virginia. .,VCU Massey Cancer Center, Virginia Commonwealth University, Richmond, Virginia.,VCU Institute of Molecular Medicine (VIMM), Virginia Commonwealth University, Richmond, Virginia
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10
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Akiel MA, Santhekadur PK, Mendoza RG, Siddiq A, Fisher PB, Sarkar D. Tetraspanin 8 mediates AEG-1-induced invasion and metastasis in hepatocellular carcinoma cells. FEBS Lett 2016; 590:2700-8. [PMID: 27339400 DOI: 10.1002/1873-3468.12268] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Accepted: 06/20/2016] [Indexed: 01/05/2023]
Abstract
Astrocyte-elevated gene-1 (AEG-1) positively regulates tumor progression and metastasis. Here, we document that AEG-1 upregulates transcription of the membrane protein tetraspanin 8 (TSPAN8). Knocking down TSPAN8 in AEG-1-overexpressing human hepatocellular carcinoma (HCC) cells markedly inhibited invasion and migration without affecting proliferation. TSPAN8 knockdown profoundly abrogated AEG-1-induced primary tumor and intrahepatic metastasis in an orthopic xenograft model in athymic nude mice. Coculture of TSPAN8 knockdown cells with human umbilical vein endothelial cells (HUVEC) markedly inhibited HUVEC tube formation indicating that inhibition of angiogenesis might cause reduction in primary tumor size. TSPAN8 inhibition might be a potential therapeutic strategy for metastatic HCC.
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Affiliation(s)
- Maaged A Akiel
- Departments of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, VA, USA
| | - Prasanna K Santhekadur
- Departments of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, VA, USA
| | - Rachel G Mendoza
- Departments of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, VA, USA
| | - Ayesha Siddiq
- Departments of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, VA, USA
| | - Paul B Fisher
- Departments of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, VA, USA.,VCU Massey Cancer Center, Virginia Commonwealth University, Richmond, VA, USA.,VCU Institute of Molecular Medicine (VIMM), Virginia Commonwealth University, Richmond, VA, USA
| | - Devanand Sarkar
- Departments of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, VA, USA.,VCU Massey Cancer Center, Virginia Commonwealth University, Richmond, VA, USA.,VCU Institute of Molecular Medicine (VIMM), Virginia Commonwealth University, Richmond, VA, USA
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11
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Rajasekaran D, Jariwala N, Mendoza RG, Robertson CL, Akiel MA, Dozmorov M, Fisher PB, Sarkar D. Staphylococcal Nuclease and Tudor Domain Containing 1 (SND1 Protein) Promotes Hepatocarcinogenesis by Inhibiting Monoglyceride Lipase (MGLL). J Biol Chem 2016; 291:10736-46. [PMID: 26997225 DOI: 10.1074/jbc.m116.715359] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [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: 01/12/2016] [Indexed: 12/16/2022] Open
Abstract
Staphylococcal nuclease and tudor domain containing 1 (SND1) is overexpressed in multiple cancers, including hepatocellular carcinoma (HCC), and functions as an oncogene. This study was carried out to identify novel SND1-interacting proteins to better understand its molecular mechanism of action. SND1-interacting proteins were identified by a modified yeast two-hybrid assay. Protein-protein interaction was confirmed by co-immunoprecipitation analysis. Monoglyceride lipase (MGLL) expression was analyzed by quantitative RT-PCR, Western blot, and immunohistochemistry. MGLL-overexpressing clones were analyzed for cell proliferation and cell cycle analysis and in vivo tumorigenesis in nude mice. MGLL was identified as an SND1-interacting protein. Interaction of SND1 with MGLL resulted in ubiquitination and proteosomal degradation of MGLL. MGLL expression was detected in normal human hepatocytes and mouse liver, although it was undetected in human HCC cell lines. An inverse correlation between SND1 and MGLL levels was identified in a human HCC tissue microarray as well as in the TCGA database. Forced overexpression of MGLL in human HCC cells resulted in marked inhibition in cell proliferation with a significant delay in cell cycle progression and a marked decrease in tumor growth in nude mouse xenograft assays. MGLL overexpression inhibited Akt activation that is independent of enzymatic activity of MGLL and overexpression of a constitutively active Akt rescued cells from inhibition of proliferation and restored normal cell cycle progression. This study unravels a novel mechanism of SND1 function and identifies MGLL as a unique tumor suppressor for HCC. MGLL might function as a homeostatic regulator of Akt restraining its activation.
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Affiliation(s)
| | - Nidhi Jariwala
- From the Departments of Human and Molecular Genetics and
| | | | | | - Maaged A Akiel
- From the Departments of Human and Molecular Genetics and
| | | | - Paul B Fisher
- From the Departments of Human and Molecular Genetics and Massey Cancer Center, and VCU Institute of Molecular Medicine, Virginia Commonwealth University, Richmond, Virginia 23298
| | - Devanand Sarkar
- From the Departments of Human and Molecular Genetics and Massey Cancer Center, and VCU Institute of Molecular Medicine, Virginia Commonwealth University, Richmond, Virginia 23298
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12
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Mendoza RG, Wooding CH. Subarachnoid hemorrhage in children. J Natl Med Assoc 1966; 58:163-4. [PMID: 5932285 PMCID: PMC2611089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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