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Ramani K, Robinson AE, Berlind J, Fan W, Abeynayake A, Binek A, Barbier-Torres L, Noureddin M, Nissen NN, Yildirim Z, Erbay E, Mato JM, Van Eyk JE, Lu SC. S-adenosylmethionine inhibits la ribonucleoprotein domain family member 1 in murine liver and human liver cancer cells. Hepatology 2022; 75:280-296. [PMID: 34449924 PMCID: PMC8766892 DOI: 10.1002/hep.32130] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [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: 03/30/2021] [Revised: 07/22/2021] [Accepted: 08/09/2021] [Indexed: 02/03/2023]
Abstract
BACKGROUND AND AIMS Methionine adenosyltransferase 1A (MAT1A) is responsible for S-adenosylmethionine (SAMe) biosynthesis in the liver. Mice lacking Mat1a have hepatic SAMe depletion and develop NASH and HCC spontaneously. Several kinases are activated in Mat1a knockout (KO) mice livers. However, characterizing the phospho-proteome and determining whether they contribute to liver pathology remain open for study. Our study aimed to provide this knowledge. APPROACH AND RESULTS We performed phospho-proteomics in Mat1a KO mice livers with and without SAMe treatment to identify SAMe-dependent changes that may contribute to liver pathology. Our studies used Mat1a KO mice at different ages treated with and without SAMe, cell lines, in vitro translation and kinase assays, and human liver specimens. We found that the most striking change was hyperphosphorylation and increased content of La-related protein 1 (LARP1), which, in the unphosphorylated form, negatively regulates translation of 5'-terminal oligopyrimidine (TOP)-containing mRNAs. Consistently, multiple TOP proteins are induced in KO livers. Translation of TOP mRNAs ribosomal protein S3 and ribosomal protein L18 was enhanced by LARP1 overexpression in liver cancer cells. We identified LARP1-T449 as a SAMe-sensitive phospho-site of cyclin-dependent kinase 2 (CDK2). Knocking down CDK2 lowered LARP1 phosphorylation and prevented LARP1-overexpression-mediated increase in translation. LARP1-T449 phosphorylation induced global translation, cell growth, migration, invasion, and expression of oncogenic TOP-ribosomal proteins in HCC cells. LARP1 expression is increased in human NASH and HCC. CONCLUSIONS Our results reveal a SAMe-sensitive mechanism of LARP1 phosphorylation that may be involved in the progression of NASH to HCC.
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Affiliation(s)
- Komal Ramani
- Karsh Division of Gastroenterology and Hepatology, Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA 90048
| | - Aaron E. Robinson
- Department of Genetics, Stanford University School of Medicine, Stanford, CA 94305
- Smidt Heart Institute and Advanced Clinical Biosystems Research Institute, Cedars-Sinai Medical Center, Los Angeles, CA 90048
| | - Joshua Berlind
- Stem Cell Biology and Regenerative Medicine, University of Southern California, Los Angeles, CA 90033
| | - Wei Fan
- Karsh Division of Gastroenterology and Hepatology, Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA 90048
| | - Aushinie Abeynayake
- Karsh Division of Gastroenterology and Hepatology, Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA 90048
| | - Aleksandra Binek
- Smidt Heart Institute and Advanced Clinical Biosystems Research Institute, Cedars-Sinai Medical Center, Los Angeles, CA 90048
| | - Lucía Barbier-Torres
- Karsh Division of Gastroenterology and Hepatology, Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA 90048
| | - Mazen Noureddin
- Karsh Division of Gastroenterology and Hepatology, Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA 90048
- Comprehensive Transplant Center, Cedars-Sinai Medical Center, Los Angeles, CA 90048
| | - Nicholas N. Nissen
- Comprehensive Transplant Center, Cedars-Sinai Medical Center, Los Angeles, CA 90048
- Department of Surgery, Cedars-Sinai Medical Center, Los Angeles, CA 90048
| | - Zehra Yildirim
- Department of Cardiology, Department of Biomedical Sciences and Smidt Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA 90048
| | - Ebru Erbay
- Department of Cardiology, Department of Biomedical Sciences and Smidt Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA 90048
| | - José M. Mato
- CIC bioGUNE, Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (Ciberehd), Technology, Derio, Bizkaia 48160, Spain
| | - Jennifer E. Van Eyk
- Smidt Heart Institute and Advanced Clinical Biosystems Research Institute, Cedars-Sinai Medical Center, Los Angeles, CA 90048
| | - Shelly C. Lu
- Karsh Division of Gastroenterology and Hepatology, Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA 90048
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Hsu AY, Wang D, Liu S, Lu J, Syahirah R, Bennin DA, Huttenlocher A, Umulis DM, Wan J, Deng Q. Phenotypical microRNA screen reveals a noncanonical role of CDK2 in regulating neutrophil migration. Proc Natl Acad Sci U S A 2019; 116:18561-18570. [PMID: 31451657 PMCID: PMC6744913 DOI: 10.1073/pnas.1905221116] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [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] [Indexed: 12/18/2022] Open
Abstract
Neutrophil migration is essential for inflammatory responses to kill pathogens; however, excessive neutrophilic inflammation also leads to tissue injury and adverse effects. To discover novel therapeutic targets that modulate neutrophil migration, we performed a neutrophil-specific microRNA (miRNA) overexpression screen in zebrafish and identified 8 miRNAs as potent suppressors of neutrophil migration. Among those, miR-199 decreases neutrophil chemotaxis in zebrafish and human neutrophil-like cells. Intriguingly, in terminally differentiated neutrophils, miR-199 alters the cell cycle-related pathways and directly suppresses cyclin-dependent kinase 2 (Cdk2), whose known activity is restricted to cell cycle progression and cell differentiation. Inhibiting Cdk2, but not DNA replication, disrupts cell polarity and chemotaxis of zebrafish neutrophils without inducing cell death. Human neutrophil-like cells deficient in CDK2 fail to polarize and display altered signaling downstream of the formyl peptide receptor. Chemotaxis of primary human neutrophils is also reduced upon CDK2 inhibition. Furthermore, miR-199 overexpression or CDK2 inhibition significantly improves the outcome of lethal systemic inflammation challenges in zebrafish. Our results therefore reveal previously unknown functions of miR-199 and CDK2 in regulating neutrophil migration and provide directions in alleviating systemic inflammation.
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Affiliation(s)
- Alan Y Hsu
- Department of Biological Sciences, Purdue University, West Lafayette, IN 47907
| | - Decheng Wang
- Department of Biological Sciences, Purdue University, West Lafayette, IN 47907
- The Institute of Infection and Inflammation, Medical College of China Three Gorges University, 443002 Yichang, Hubei, People's Republic of China
| | - Sheng Liu
- Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, IN 46202
- Collaborative Core for Cancer Bioinformatics, Indiana University Simon Cancer Center, Indianapolis, IN 46202
| | - Justice Lu
- Department of Biological Sciences, Purdue University, West Lafayette, IN 47907
| | - Ramizah Syahirah
- Department of Biological Sciences, Purdue University, West Lafayette, IN 47907
| | - David A Bennin
- Department of Medical Microbiology and Immunology, University of Wisconsin-Madison, Madison, WI 53706
| | - Anna Huttenlocher
- Department of Medical Microbiology and Immunology, University of Wisconsin-Madison, Madison, WI 53706
- Department of Pediatrics, University of Wisconsin-Madison, Madison, WI 53706
| | - David M Umulis
- Department of Agricultural and Biological Engineering, Purdue University, West Lafayette, IN 47907
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN 47907
| | - Jun Wan
- Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, IN 46202
- Collaborative Core for Cancer Bioinformatics, Indiana University Simon Cancer Center, Indianapolis, IN 46202
- Center for Computational Biology and Bioinformatics, Indiana University School of Medicine, Indianapolis, IN 46202
| | - Qing Deng
- Department of Biological Sciences, Purdue University, West Lafayette, IN 47907;
- Purdue Institute for Inflammation, Immunology, & Infectious Disease, Purdue University, West Lafayette, IN 47907
- Purdue University Center for Cancer Research, Purdue University, West Lafayette, IN 47907
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Zhang Z, Liu Q, Leskov KS, Wu X, Duan J, Zhang GL, Hall M, Rosenbaum JT. Roscovitine suppresses CD4+ T cells and T cell-mediated experimental uveitis. PLoS One 2013; 8:e81154. [PMID: 24260551 PMCID: PMC3832440 DOI: 10.1371/journal.pone.0081154] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2013] [Accepted: 10/09/2013] [Indexed: 12/31/2022] Open
Abstract
Background T cells are essential for the development of uveitis and other autoimmune diseases. After initial activation, CD4+ lymphocytes express the co-stimulatory molecule OX40 that plays an important role in T cell proliferation. Cyclin dependent kinase 2 (CdK2) plays a pivotal role in the cell cycle transition from G1 to S phase. In addition, recent research has implicated CdK2 in T cell activation. Thus, we sought to test the immunosuppressive effect of roscovitine, a potent CdK2 inhibitor, on CD4+ T cell activation, proliferation, and function. Design and Methods Mouse CD4+ T cells were activated by anti-CD3 and anti-CD28 antibodies. The expression of OX40, CD44, and CdK2 were analyzed by flow cytometry. In addition, cell cycle progression and apoptosis of control and roscovitine-treated T lymphocytes were measured by BrdU incorporation and annexin V assay, respectively. Furthermore, the immunoregulatory effect of roscovitine was evaluated in both ovalbumin-induced uveitis and experimental autoimmune uveitis (EAU) models. Results In this study, we found that T cell activation induced OX40 expression. Cell cycle analysis showed that more CD4+OX40+ cells entered S phase than OX40- T cells. Concurrently, CD4+OX40+ cells had a higher level of CdK2 expression. Roscovitine treatment blocked activated CD4+ cells from entering S phase. In addition, roscovitine not only reduced the viability of CD4+ lymphocytes but also suppressed T cell activation and cytokine production. Finally, roscovitine significantly attenuated the severity of T cell-dependent, OX40-enhanced uveitis. Conclusion These results implicate CdK2 in OX40-augmented T cell response and expansion. Furthermore, this study suggests that roscovitine is a novel, promising, therapeutic agent for treating T cell-mediated diseases such as uveitis.
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Affiliation(s)
- Zili Zhang
- Department of Pediatrics, Case Western Reserve University, Cleveland, Ohio, United States of America
- Department of Pediatrics, Oregon Health & Science University, Portland, Oregon, United States of America
- * E-mail:
| | - Qi Liu
- Department of Pediatrics, Case Western Reserve University, Cleveland, Ohio, United States of America
| | - Konstantin S. Leskov
- Department of Pediatrics, Case Western Reserve University, Cleveland, Ohio, United States of America
| | - Xiumei Wu
- Department of Pediatrics, Oregon Health & Science University, Portland, Oregon, United States of America
| | - Jie Duan
- Department of Pediatrics, Oregon Health & Science University, Portland, Oregon, United States of America
| | - Gary L. Zhang
- Department of Pediatrics, Oregon Health & Science University, Portland, Oregon, United States of America
| | - Mark Hall
- Department of Pediatrics, Oregon Health & Science University, Portland, Oregon, United States of America
| | - James T. Rosenbaum
- Departments of Medicine and Ophthalmology, Oregon Health & Science University, Portland, Oregon, United States of America
- Devers Eye Institute, Legacy Health System, Portland, Oregon, United States of America
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Tegla CA, Cudrici C, Patel S, Trippe R, Rus V, Niculescu F, Rus H. Membrane attack by complement: the assembly and biology of terminal complement complexes. Immunol Res 2012; 51:45-60. [PMID: 21850539 DOI: 10.1007/s12026-011-8239-5] [Citation(s) in RCA: 187] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Complement system activation plays an important role in both innate and acquired immunity. Activation of the complement and the subsequent formation of C5b-9 channels (the membrane attack complex) on the cell membranes lead to cell death. However, when the number of channels assembled on the surface of nucleated cells is limited, sublytic C5b-9 can induce cell cycle progression by activating signal transduction pathways and transcription factors and inhibiting apoptosis. This induction by C5b-9 is dependent upon the activation of the phosphatidylinositol 3-kinase/Akt/FOXO1 and ERK1 pathways in a Gi protein-dependent manner. C5b-9 induces sequential activation of CDK4 and CDK2, enabling the G1/S-phase transition and cellular proliferation. In addition, it induces RGC-32, a novel gene that plays a role in cell cycle activation by interacting with Akt and the cyclin B1-CDC2 complex. C5b-9 also inhibits apoptosis by inducing the phosphorylation of Bad and blocking the activation of FLIP, caspase-8, and Bid cleavage. Thus, sublytic C5b-9 plays an important role in cell activation, proliferation, and differentiation, thereby contributing to the maintenance of cell and tissue homeostasis.
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Affiliation(s)
- Cosmin A Tegla
- Department of Neurology, School of Medicine, University of Maryland, 655 W. Baltimore Street, BRB 12-033, Baltimore, MD 21201, USA
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Abstract
Hsp90 and its cochaperone Cdc37 cooperate to provide requisite support to numerous protein kinases involved in cellular signal transduction. In this report, we studied the interactions of Hsp90 and Cdc37 with the cyclin-dependent kinase, Cdk2. Treatment of K562 cells with the Hsp90 inhibitor, geldanamycin, caused a 75% reduction in Cdk2 levels and reduced the levels of its activating kinase, Cdk7, by more than 60%, suggesting that both of these kinases may be Hsp90 clients. Using classical pull-down assays and the Hsp90 inhibitory agents geldanamycin and molybdate, Cdk2 is shown to be a genuine client of the Hsp90 chaperone complex. Subsequently, pull-down assays directed at helix alphaC of Cdk2 are shown to disrupt Hsp90 and Cdc37 binding and explain the initial difficulties in demonstrating these interactions. Mutant constructs containing deletions of secondary structural elements from the N- and C-termini of Cdk2 were prepared and assayed for their ability to coadsorb Hsp90 and Cdc37 in a salt-stable high-affinity manner with and without the addition of molybdate. Consistent with similar work done with the cyclin-dependent kinase relative Cdk4, the presence of the G-box motif of Cdk2 was shown to be critical for Cdc37 binding, whereas consistent with work done with the Src-family tyrosine kinase Lck, the presence of helix alphaC and the stabilization of helix alphaE were shown to be needed for Hsp90 binding.
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Affiliation(s)
- Thomas Prince
- Department of Biochemistry and Molecular Biology, Oklahoma State University, Stillwater, Oklahoma 74078-3035, USA
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