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Gao J, Xu Z, Song W, Huang J, Liu W, He Z, He L. USP11 regulates proliferation and apoptosis of human spermatogonial stem cells via HOXC5-mediated canonical WNT/β-catenin signaling pathway. Cell Mol Life Sci 2024; 81:211. [PMID: 38722330 PMCID: PMC11082041 DOI: 10.1007/s00018-024-05248-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Revised: 03/23/2024] [Accepted: 04/21/2024] [Indexed: 05/12/2024]
Abstract
Spermatogonial stem cells (SSCs) are capable of transmitting genetic information to the next generations and they are the initial cells for spermatogenesis. Nevertheless, it remains largely unknown about key genes and signaling pathways that regulate fate determinations of human SSCs and male infertility. In this study, we explored the expression, function, and mechanism of USP11 in controlling the proliferation and apoptosis of human SSCs as well as the association between its abnormality and azoospermia. We found that USP11 was predominantly expressed in human SSCs as shown by database analysis and immunohistochemistry. USP11 silencing led to decreases in proliferation and DNA synthesis and an enhancement in apoptosis of human SSCs. RNA-sequencing identified HOXC5 as a target of USP11 in human SSCs. Double immunofluorescence, Co-immunoprecipitation (Co-IP), and molecular docking demonstrated an interaction between USP11 and HOXC5 in human SSCs. HOXC5 knockdown suppressed the growth of human SSCs and increased apoptosis via the classical WNT/β-catenin pathway. In contrast, HOXC5 overexpression reversed the effect of proliferation and apoptosis induced by USP11 silencing. Significantly, lower levels of USP11 expression were observed in the testicular tissues of patients with spermatogenic disorders. Collectively, these results implicate that USP11 regulates the fate decisions of human SSCs through the HOXC5/WNT/β-catenin pathway. This study thus provides novel insights into understanding molecular mechanisms underlying human spermatogenesis and the etiology of azoospermia and it offers new targets for gene therapy of male infertility.
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Affiliation(s)
- Jun Gao
- Department of Urology, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Zhipeng Xu
- Department of Urology, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Weijie Song
- Department of Urology, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Jiwei Huang
- Department of Urology, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Wei Liu
- Key Laboratory of Model Animals and Stem Cell Biology in Hunan Province, School of Medicine, Engineering Research Center of Reproduction and Translational Medicine of Hunan Province, Hunan Normal University, Changsha, Hunan, 410013, China
- Department of Pharmacy, The Third Xiangya Hospital, Central South University, Changsha, 410011, China
| | - Zuping He
- Key Laboratory of Model Animals and Stem Cell Biology in Hunan Province, School of Medicine, Engineering Research Center of Reproduction and Translational Medicine of Hunan Province, Hunan Normal University, Changsha, Hunan, 410013, China.
| | - Leye He
- Department of Urology, The Third Xiangya Hospital, Central South University, Changsha, China.
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2
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Radin DP, Shifman S, Outhwaite IR, Sharma A, Bases R, Seeliger MA, Tsirka SE. Lucanthone, a Potential PPT1 Inhibitor, Perturbs Stemness, Reduces Tumor Microtube Formation, and Slows the Growth of Temozolomide-Resistant Gliomas In Vivo. J Pharmacol Exp Ther 2024; 389:51-60. [PMID: 38296645 PMCID: PMC10949164 DOI: 10.1124/jpet.123.002021] [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] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 12/28/2023] [Accepted: 01/12/2024] [Indexed: 02/02/2024] Open
Abstract
Glioblastoma (GBM) is the most frequently diagnosed primary central nervous system tumor in adults. Despite the standard of care therapy, which includes surgical resection, temozolomide chemotherapy, radiation and the newly added tumor-treating fields, median survival remains only ∼20 months. Unfortunately, GBM has a ∼100% recurrence rate, but after recurrence there are no Food and Drug Administration-approved therapies to limit tumor growth and enhance patient survival, as these tumors are resistant to temozolomide (TMZ). Recently, our laboratory reported that lucanthone slows GBM by inhibiting autophagic flux through lysosome targeting and decreases the number of Olig2+ glioma stem-like cells (GSC) in vitro and in vivo. We now additionally report that lucanthone efficiently abates stemness in patient-derived GSC and reduces tumor microtube formation in GSC, an emerging hallmark of treatment resistance in GBM. In glioma tumors derived from cells with acquired resistance to TMZ, lucanthone retains the ability to perturb tumor growth, inhibits autophagy by targeting lysosomes, and reduces Olig2 positivity. We also find that lucanthone may act as an inhibitor of palmitoyl protein thioesterase 1. Our results suggest that lucanthone may function as a potential treatment option for GBM tumors that are not amenable to TMZ treatment. SIGNIFICANCE STATEMENT: We report that the antischistosome agent lucanthone impedes tumor growth in a preclinical model of temozolomide-resistant glioblastoma and reduces the numbers of stem-like glioma cells. In addition, it acts as an autophagy inhibitor, and its mechanism of action may be via inhibition of palmitoyl protein thioesterase 1. As there are no defined therapies approved for recurrent, TMZ-resistant tumor, lucanthone could emerge as a treatment for glioblastoma tumors that may not be amenable to TMZ both in the newly diagnosed and recurrent settings.
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Affiliation(s)
- Daniel P Radin
- Department of Pharmacological Sciences (D.P.R., S.S., I.R.O., A.S., M.A.S., S.E.T.) and Stony Brook Medical Scientist Training Program (D.P.R., S.S., I.R.O.), Renaissance School of Medicine at Stony Brook University, Stony Brook, New York
| | - Sophie Shifman
- Department of Pharmacological Sciences (D.P.R., S.S., I.R.O., A.S., M.A.S., S.E.T.) and Stony Brook Medical Scientist Training Program (D.P.R., S.S., I.R.O.), Renaissance School of Medicine at Stony Brook University, Stony Brook, New York
| | - Ian R Outhwaite
- Department of Pharmacological Sciences (D.P.R., S.S., I.R.O., A.S., M.A.S., S.E.T.) and Stony Brook Medical Scientist Training Program (D.P.R., S.S., I.R.O.), Renaissance School of Medicine at Stony Brook University, Stony Brook, New York
| | - Aryan Sharma
- Department of Pharmacological Sciences (D.P.R., S.S., I.R.O., A.S., M.A.S., S.E.T.) and Stony Brook Medical Scientist Training Program (D.P.R., S.S., I.R.O.), Renaissance School of Medicine at Stony Brook University, Stony Brook, New York
| | - Robert Bases
- Department of Pharmacological Sciences (D.P.R., S.S., I.R.O., A.S., M.A.S., S.E.T.) and Stony Brook Medical Scientist Training Program (D.P.R., S.S., I.R.O.), Renaissance School of Medicine at Stony Brook University, Stony Brook, New York
| | - Markus A Seeliger
- Department of Pharmacological Sciences (D.P.R., S.S., I.R.O., A.S., M.A.S., S.E.T.) and Stony Brook Medical Scientist Training Program (D.P.R., S.S., I.R.O.), Renaissance School of Medicine at Stony Brook University, Stony Brook, New York
| | - Stella E Tsirka
- Department of Pharmacological Sciences (D.P.R., S.S., I.R.O., A.S., M.A.S., S.E.T.) and Stony Brook Medical Scientist Training Program (D.P.R., S.S., I.R.O.), Renaissance School of Medicine at Stony Brook University, Stony Brook, New York
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3
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Zhou F, Deng Z, Shen D, Lu M, Li M, Yu J, Xiao Y, Wang G, Qian K, Ju L, Wang X. DLGAP5 triggers proliferation and metastasis of bladder cancer by stabilizing E2F1 via USP11. Oncogene 2024; 43:594-607. [PMID: 38182895 DOI: 10.1038/s41388-023-02932-y] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2023] [Revised: 12/15/2023] [Accepted: 12/21/2023] [Indexed: 01/07/2024]
Abstract
Bladder cancer (BLCA) is one of the most widespread malignancies worldwide, and displays significant tumor heterogeneity. Understanding the molecular mechanisms exploitable for treating aggressive BLCA represents a crucial objective. Despite the involvement of DLGAP5 in tumors, its precise molecular role in BLCA remains unclear. BLCA tissues exhibit a substantial increase in DLGAP5 expression compared with normal bladder tissues. This heightened DLGAP5 expression positively correlated with the tumor's clinical stage and significantly affected prognosis negatively. Additionally, experiments conducted in vitro and in vivo revealed that alterations in DLGAP5 expression notably influence cell proliferation and migration. Mechanistically, the findings demonstrated that DLGAP5 was a direct binding partner of E2F1 and that DLGAP5 stabilized E2F1 by preventing the ubiquitination of E2F1 through USP11. Furthermore, as a pivotal transcription factor, E2F1 fosters the transcription of DLGAP5, establishing a positive feedback loop between DLGAP5 and E2F1 that accelerates BLCA development. In summary, this study identified DLGAP5 as an oncogene in BLCA. Our research unveils a novel oncogenic mechanism in BLCA and offers a potential target for both diagnosing and treating BLCA.
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Affiliation(s)
- Fenfang Zhou
- Department of Urology, Laboratory of Precision Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China
- Department of Radiology, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Zhao Deng
- Department of Urology, Laboratory of Precision Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Dexin Shen
- Department of Urology, Laboratory of Precision Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China
- Department of Urology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
| | - Mengxin Lu
- Department of Urology, Laboratory of Precision Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Mingxing Li
- Department of Urology, Laboratory of Precision Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Jingtian Yu
- Department of Urology, Laboratory of Precision Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Yu Xiao
- Department of Urology, Laboratory of Precision Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China
- Department of Biological Repositories, Human Genetic Resources Preservation Center of Hubei Province, Hubei Key Laboratory of Urological Diseases, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Gang Wang
- Department of Biological Repositories, Human Genetic Resources Preservation Center of Hubei Province, Hubei Key Laboratory of Urological Diseases, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Kaiyu Qian
- Department of Biological Repositories, Human Genetic Resources Preservation Center of Hubei Province, Hubei Key Laboratory of Urological Diseases, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Lingao Ju
- Department of Biological Repositories, Human Genetic Resources Preservation Center of Hubei Province, Hubei Key Laboratory of Urological Diseases, Zhongnan Hospital of Wuhan University, Wuhan, China.
| | - Xinghuan Wang
- Department of Urology, Laboratory of Precision Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China.
- Department of Biological Repositories, Human Genetic Resources Preservation Center of Hubei Province, Hubei Key Laboratory of Urological Diseases, Zhongnan Hospital of Wuhan University, Wuhan, China.
- Medical Research Institute, Frontier Science Center for Immunology and Metabolism, Taikang Center for Life and Medical Sciences, Wuhan University, Wuhan, China.
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4
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Ma S, Shi S, Xu B, Liu M, Xie L, Su Y, Li J, Liang Q, Ye S, Wang Y. Host serine protease ACOT2 assists DENV proliferation by hydrolyzing viral polyproteins. mSystems 2024; 9:e0097323. [PMID: 38112462 PMCID: PMC10804956 DOI: 10.1128/msystems.00973-23] [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: 09/11/2023] [Accepted: 11/12/2023] [Indexed: 12/21/2023] Open
Abstract
Dengue fever is a mosquito-borne tropical disease caused by the dengue virus (DENV). The replication of DENV relies on the processing of its genome-encoded polyprotein by both viral protease NS3 (NS3pro) and host proteases. However, the impact of host proteases on DENV proliferation is not well understood. In this study, we utilized fluorophosphonate-based probes (FPs) to investigate the up-regulation of host serine proteases during DENV infection in detail. Among the identified proteases, acyl-CoA thioesterase 2 (ACOT2), an enzyme that hydrolyzes acyl-CoA molecules to generate fatty acids and free CoA, exhibited cleavage activity against DENV polypeptide substrates. Enzymatic assays and virological experiments confirmed that ACOT2 contributes to DENV propagation during the replication stage by cleaving the viral polyprotein. Docking models provided insights into the binding pocket of viral polypeptides and the catalytic mechanism of ACOT2. Notably, this study is the first to demonstrate that ACOT2 functions as a serine protease to hydrolyze protein substrates. These findings offer novel insights into DENV infection, host response, as well as the potential development of innovative antiviral strategies.IMPORTANCEDENV, one of the major pathogens of Dengue fever, remains a significant public health concern in tropical and subtropical regions worldwide. How DENV efficiently hijacks the host and accesses its life cycle with delicate interaction remains to be elucidated. Here, we deconvoluted that the host protease ACOT2 assists the DENV replication and characterized the ACOT2 as a serine protease involved in the hydrolysis of the DENV polypeptide substrate. Our results not only further the understanding of the DENV life cycle but also provide a possibility for the usage of activity-based proteomics to reveal host-virus interactions.
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Affiliation(s)
- Sen Ma
- Frontiers Science Center for Synthetic Biology (Ministry of Education), Tianjin Key Laboratory of Function and Application of Biological Macromolecular Structures, School of Life Sciences, Tianjin University, Tianjin, China
| | - Sai Shi
- Frontiers Science Center for Synthetic Biology (Ministry of Education), Tianjin Key Laboratory of Function and Application of Biological Macromolecular Structures, School of Life Sciences, Tianjin University, Tianjin, China
| | - Binghong Xu
- Frontiers Science Center for Synthetic Biology (Ministry of Education), Tianjin Key Laboratory of Function and Application of Biological Macromolecular Structures, School of Life Sciences, Tianjin University, Tianjin, China
| | - Meijun Liu
- Frontiers Science Center for Synthetic Biology (Ministry of Education), Tianjin Key Laboratory of Function and Application of Biological Macromolecular Structures, School of Life Sciences, Tianjin University, Tianjin, China
| | - Lei Xie
- Frontiers Science Center for Synthetic Biology (Ministry of Education), Tianjin Key Laboratory of Function and Application of Biological Macromolecular Structures, School of Life Sciences, Tianjin University, Tianjin, China
| | - Yang Su
- Center of Basic Molecular Science, Department of Chemistry, Tsinghua University, Beijing, China
| | - Jiachen Li
- Frontiers Science Center for Synthetic Biology (Ministry of Education), Tianjin Key Laboratory of Function and Application of Biological Macromolecular Structures, School of Life Sciences, Tianjin University, Tianjin, China
| | - Qinqin Liang
- Frontiers Science Center for Synthetic Biology (Ministry of Education), Tianjin Key Laboratory of Function and Application of Biological Macromolecular Structures, School of Life Sciences, Tianjin University, Tianjin, China
| | - Sheng Ye
- Frontiers Science Center for Synthetic Biology (Ministry of Education), Tianjin Key Laboratory of Function and Application of Biological Macromolecular Structures, School of Life Sciences, Tianjin University, Tianjin, China
| | - Yaxin Wang
- Frontiers Science Center for Synthetic Biology (Ministry of Education), Tianjin Key Laboratory of Function and Application of Biological Macromolecular Structures, School of Life Sciences, Tianjin University, Tianjin, China
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5
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Fijalkowski I, Wang J, Jin Q, Van Laere J, Serafin V, Crispino JD, Ntziachristos P. A positive feedback loop regulation between NOTCH1 and USP11 in T-cell leukemia. Leukemia 2024; 38:193-197. [PMID: 38007584 PMCID: PMC10776390 DOI: 10.1038/s41375-023-02096-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2023] [Revised: 11/07/2023] [Accepted: 11/15/2023] [Indexed: 11/27/2023]
Affiliation(s)
- Igor Fijalkowski
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium
- Center for Medical Genetics, Ghent University and University Hospital, Ghent, Belgium
- Cancer Research Institute Ghent (CRIG), Ghent, Belgium
| | - Jin Wang
- Health Management Center, Renmin Hospital of Wuhan University, Wuhan, China
| | - Qi Jin
- Department of Biochemistry and Molecular Genetics, Northwestern University, Chicago, IL, USA
- Division of Experimental Hematology, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Jolien Van Laere
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium
- Center for Medical Genetics, Ghent University and University Hospital, Ghent, Belgium
- Cancer Research Institute Ghent (CRIG), Ghent, Belgium
| | - Valentina Serafin
- Pediatric Research Institute Foundation "Città Della Speranza", Padova, Italy
- Cellular Signaling Unit, Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - John D Crispino
- Division of Experimental Hematology, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Panagiotis Ntziachristos
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium.
- Center for Medical Genetics, Ghent University and University Hospital, Ghent, Belgium.
- Cancer Research Institute Ghent (CRIG), Ghent, Belgium.
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6
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Zhao S, Yan F, Liu Y, Sun M, Wang Y, Li J, Zhang X, Yang X, Wang Q. Glycine max acyl-acyl carrier protein thioesterase B gene overexpression alters lipid content and fatty acid profile of Arabidopsis seeds. Funct Plant Biol 2024; 51:FP23001. [PMID: 38228091 DOI: 10.1071/fp23001] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2023] [Accepted: 12/20/2023] [Indexed: 01/18/2024]
Abstract
The fatty acyl-acyl carrier protein thioesterase B (FATB ) gene, involved in the synthesis of saturated fatty acids, plays an important role in the content of fatty acid and composition of seed storage lipids. However, the role of FATB in soybeans (Glycine max ) has been poorly characterised. This paper presents a preliminary bioinformatics and molecular biological investigation of 10 hypothetical FATB members. The results revealed that GmFATB1B , GmFATB2A and GmFATB2B contain many response elements involved in defense and stress responses and meristem tissue expression. Moreover, the coding sequences of GmFATB1A and GmFATB1B were significantly longer than those of the other genes. Their expression varied in different organs of soybean plants during growth, with GmFATB2A and GmFATB2B showing higher relative expression. In addition, subcellular localisation analysis revealed that they were mainly present in chloroplasts. Overexpression of GmFATB1A , GmFATB1B , GmFATB2A and GmFATB2B in transgenic Arabidopsis thaliana plants increased the seed oil content by 10.3%, 12.5%, 7.5% and 8.4%, respectively, compared to that in the wild-type and led to significant increases in palmitic and stearic acid content. Thus, this research has increased our understanding of the FATB family in soybeans and provides a theoretical basis for subsequent improvements in soybean quality.
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Affiliation(s)
- Shihui Zhao
- College of Plant Science, Jilin University, Changchun, China
| | - Fan Yan
- College of Plant Science, Jilin University, Changchun, China
| | - Yajing Liu
- College of Plant Science, Jilin University, Changchun, China
| | - Monan Sun
- College of Plant Science, Jilin University, Changchun, China
| | - Ying Wang
- College of Plant Science, Jilin University, Changchun, China
| | - Jingwen Li
- College of Plant Science, Jilin University, Changchun, China
| | - Xinsheng Zhang
- College of Plant Science, Jilin University, Changchun, China
| | - Xuguang Yang
- College of Plant Science, Jilin University, Changchun, China
| | - Qingyu Wang
- College of Plant Science, Jilin University, Changchun, China
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Bestion E, Rachid M, Tijeras-Raballand A, Roth G, Decaens T, Ansaldi C, Mezouar S, Raymond E, Halfon P. Ezurpimtrostat, A Palmitoyl-Protein Thioesterase-1 Inhibitor, Combined with PD-1 Inhibition Provides CD8 + Lymphocyte Repopulation in Hepatocellular Carcinoma. Target Oncol 2024; 19:95-106. [PMID: 38133710 DOI: 10.1007/s11523-023-01019-8] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/20/2023] [Indexed: 12/23/2023]
Abstract
BACKGROUND Palmitoyl-protein thioesterase-1 (PPT1) is a clinical stage druggable target for inhibiting autophagy in cancer. OBJECTIVE We aimed to determine the cellular and molecular activity of targeting PPT1 using ezurpimtrostat, in combination with an anti-PD-1 antibody. METHODS In this study we used a transgenic immunocompetent mouse model of hepatocellular carcinoma. RESULTS Herein, we revealed that inhibition of PPT1 using ezurpimtrostat decreased the liver tumor burden in a mouse model of hepatocellular carcinoma by inducing the penetration of lymphocytes into tumors when combined with anti-programmed death-1 (PD-1). Inhibition of PPT1 potentiates the effects of anti-PD-1 immunotherapy by increasing the expression of major histocompatibility complex (MHC)-I at the surface of liver cancer cells and modulates immunity through recolonization and activation of cytotoxic CD8+ lymphocytes. CONCLUSIONS Ezurpimtrostat turns cold tumors into hot tumors and, thus, could improve T cell-mediated immunotherapies in liver cancer.
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Affiliation(s)
- Eloïne Bestion
- Genoscience Pharma, 10, Rue d'Iéna, 13006, Marseille, France
| | - Madani Rachid
- Genoscience Pharma, 10, Rue d'Iéna, 13006, Marseille, France
| | | | - Gael Roth
- Centre hospitalouniversitaire Grenoble Alpes/Institute for Advanced Biosciences, Centre national de la recherché scienti-fique, Unité mixte de recherche 5309-Institut national de la santé et de la recherche médicale U1209, University Grenoble Alpes/Hepato-Gastroenterology and Digestive Oncology Department, 38043, Grenoble, France
| | - Thomas Decaens
- Centre hospitalouniversitaire Grenoble Alpes/Institute for Advanced Biosciences, Centre national de la recherché scienti-fique, Unité mixte de recherche 5309-Institut national de la santé et de la recherche médicale U1209, University Grenoble Alpes/Hepato-Gastroenterology and Digestive Oncology Department, 38043, Grenoble, France
| | | | - Soraya Mezouar
- Genoscience Pharma, 10, Rue d'Iéna, 13006, Marseille, France
- Etablissement français du sang, Centre national de la recherche scientifique, Anthropologie bio-culturelle, droit, éthique et santé, "Biologie des Groupes Sanguins", Aix-Marseille University, Marseille, France
| | - Eric Raymond
- Genoscience Pharma, 10, Rue d'Iéna, 13006, Marseille, France
- Oncology Department, Groupe Hospitalier Paris Saint Joseph, Paris, France
| | - Philippe Halfon
- Genoscience Pharma, 10, Rue d'Iéna, 13006, Marseille, France.
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Wang J, Wen Y, Zhao W, Zhang Y, Lin F, Ouyang C, Wang H, Yao L, Ma H, Zhuo Y, Huang H, Shi X, Feng L, Lin D, Jiang B, Li Q. Hepatic conversion of acetyl-CoA to acetate plays crucial roles in energy stress. eLife 2023; 12:RP87419. [PMID: 37902629 PMCID: PMC10615369 DOI: 10.7554/elife.87419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2023] Open
Abstract
Accumulating evidence indicates that acetate is increased under energy stress conditions such as those that occur in diabetes mellitus and prolonged starvation. However, how and where acetate is produced and the nature of its biological significance are largely unknown. We observed overproduction of acetate to concentrations comparable to those of ketone bodies in patients and mice with diabetes or starvation. Mechanistically, ACOT12 and ACOT8 are dramatically upregulated in the liver to convert free fatty acid-derived acetyl-CoA to acetate and CoA. This conversion not only provides a large amount of acetate, which preferentially fuels the brain rather than muscle, but also recycles CoA, which is required for sustained fatty acid oxidation and ketogenesis. We suggest that acetate is an emerging novel 'ketone body' that may be used as a parameter to evaluate the progression of energy stress.
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Affiliation(s)
- Jinyang Wang
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Faculty of Medicine and Life Sciences, Xiamen University, Xiamen, China
| | - Yaxin Wen
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Faculty of Medicine and Life Sciences, Xiamen University, Xiamen, China
| | - Wentao Zhao
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Faculty of Medicine and Life Sciences, Xiamen University, Xiamen, China
| | - Yan Zhang
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Faculty of Medicine and Life Sciences, Xiamen University, Xiamen, China
| | - Furong Lin
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Faculty of Medicine and Life Sciences, Xiamen University, Xiamen, China
| | - Cong Ouyang
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Faculty of Medicine and Life Sciences, Xiamen University, Xiamen, China
| | - Huihui Wang
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Faculty of Medicine and Life Sciences, Xiamen University, Xiamen, China
| | - Lizheng Yao
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Faculty of Medicine and Life Sciences, Xiamen University, Xiamen, China
| | - Huanhuan Ma
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Faculty of Medicine and Life Sciences, Xiamen University, Xiamen, China
| | - Yue Zhuo
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Faculty of Medicine and Life Sciences, Xiamen University, Xiamen, China
| | - Huiying Huang
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Faculty of Medicine and Life Sciences, Xiamen University, Xiamen, China
| | - Xiulin Shi
- Department of Endocrinology and Diabetes, Xiamen Diabetes Institute, Fujian Province Key Laboratory of Translational Research for Diabetes, The First Affiliated Hospital of Xiamen University, Xiamen, China
| | - Liubin Feng
- High-Field NMR Center, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, China
| | - Donghai Lin
- Department of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, China
| | - Bin Jiang
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Faculty of Medicine and Life Sciences, Xiamen University, Xiamen, China
| | - Qinxi Li
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Faculty of Medicine and Life Sciences, Xiamen University, Xiamen, China
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Han Z, Jia Q, Zhang J, Chen M, Wang L, Tong K, He W, Zhang Y, Zhu W, Qin J, Wang T, Liu T, Ma Y, Chen Y, Zha S, Zhang C. Deubiquitylase YOD1 regulates CDK1 stability and drives triple-negative breast cancer tumorigenesis. J Exp Clin Cancer Res 2023; 42:228. [PMID: 37667382 PMCID: PMC10478497 DOI: 10.1186/s13046-023-02781-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Accepted: 07/25/2023] [Indexed: 09/06/2023] Open
Abstract
BACKGROUND Accumulating evidence has demonstrated that aberrant expression of deubiquitinating enzymes is associated with the initiation and progression of Triple-negative breast cancer (TNBC). The publicly available TCGA database of breast cancer data was used to analyze the OTUD deubiquitinating family members that were correlated with survival of breast cancer and ovarian tumor domain-containing 2 (OTUD-2), or YOD1 was identified. The aim of present study was to assess YOD1 expression and function in human TNBC and then explored the underlying molecular events. METHODS We detected the expression of YOD1 in 32 TNBC and 44 NTNBC samples by qRT-PCR, Western blot and immunohistochemistry. Manipulation of YOD1 expression was assessed in vitro and in vivo for TNBC cell proliferation, migration, invasion, cell-cycle and drug resistance, using colony formation assay, transwell assay, CCK8 assay, TUNEL assay, flow cytometric analysis and xenograft tumor assay. Next, proteomic analysis, Western blot, proximity ligation assay, Immunoprecipitation, and Immunofluorescence were conducted to assess downstream targets. RESULTS It was found that YOD1 was significantly upregulated in TNBC tissues compared with non-triple-negative breast cancer (NTNBC), which was positively correlated with poor survival in TNBC patients. Knockdown of YOD1 effectively inhibited TNBC cell migration, proliferation, cell cycle and resistance to cisplatin and paclitaxel. Mechanistically, YOD1 promoted TNBC progression in a manner dependent on its catalytic activity through binding with CDK1, leading to de-polyubiquitylation of CDK1 and upregulation of CDK1 expression. In addition, YOD1 overexpression was found to be correlated with CDK1 overexpression in human TNBC specimens. Finally, in vivo study demonstrated that YOD1 knockdown or YOD1 inhibitor could inhibit CDK1 expression and suppress the growth and metastasis of TNBC tumors. CONCLUSION Our study highlights that YOD1 functions as an oncogene in TNBC via binding to CDK1 and mediated its stability and oncogenic activity. Interfering with YOD1 expression or YOD1 inhibitor could suppress TNBC cells in vitro and in vivo, suggesting that YOD1 may prove to be a promising therapeutic target for TNBC.
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Affiliation(s)
- Zhitao Han
- School of Chinese Medicine, School of Integrated Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China
- Nanjing Hospital of Chinese Medicine, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China
| | - Qi Jia
- Department of Orthopaedic Oncology, Shanghai Changzheng Hospital, The Second Affiliated Hospital of Naval Medical University, Shanghai, China
| | - Jing Zhang
- Department of Orthopaedic Oncology, Shanghai Changzheng Hospital, The Second Affiliated Hospital of Naval Medical University, Shanghai, China
| | - Miaomiao Chen
- Key Laboratory of Digital Technology in Medical Diagnostics of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Lining Wang
- School of Chinese Medicine, School of Integrated Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China
| | - Kai Tong
- Nanjing Hospital of Chinese Medicine, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China
| | - Weiwei He
- Nanjing Hospital of Chinese Medicine, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China
| | - Yajie Zhang
- Central Laboratory, Nanjing Hospital of Chinese Medicine, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China
- Department of Biobank, Nanjing Hospital of Chinese Medicine, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China
| | - Weina Zhu
- Central Laboratory, Nanjing Hospital of Chinese Medicine, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China
- Department of Biobank, Nanjing Hospital of Chinese Medicine, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China
| | - Ju Qin
- Central Laboratory, Nanjing Hospital of Chinese Medicine, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China
| | - Tao Wang
- Department of Orthopedics, Second Hospital of Anhui Medical University, Hefei, Anhui, China
| | - Tielong Liu
- Department of Orthopaedic Oncology, Shanghai Changzheng Hospital, The Second Affiliated Hospital of Naval Medical University, Shanghai, China
| | - Yong Ma
- School of Chinese Medicine, School of Integrated Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China.
| | - Yuanming Chen
- Department of Orthopedics, Second Affiliated Hospital of Guangxi Medical University, 166 East Daxue Road, Nanning, 530000, Guangxi, China.
| | - Siluo Zha
- Department of General Surgery, Shanghai Changzheng Hospital, The Second Affiliated Hospital of Naval Medical University, Shanghai, 200003, China.
| | - Chunlei Zhang
- Nanjing Hospital of Chinese Medicine, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China.
- Department of Orthopedics, Nanjing Hospital of Chinese Medicine Affiliated to Nanjing University of Chinese Medicine, 157 Daming Road, Nanjing, 210023, China.
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Ji T, Zheng L, Wu J, Duan M, Liu Q, Liu P, Shen C, Liu J, Ye Q, Wen J, Dong J, Wang T. The thioesterase APT1 is a bidirectional-adjustment redox sensor. Nat Commun 2023; 14:2807. [PMID: 37198152 PMCID: PMC10192129 DOI: 10.1038/s41467-023-38464-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Accepted: 05/04/2023] [Indexed: 05/19/2023] Open
Abstract
The adjustment of cellular redox homeostasis is essential in when responding to environmental perturbations, and the mechanism by which cells distinguish between normal and oxidized states through sensors is also important. In this study, we found that acyl-protein thioesterase 1 (APT1) is a redox sensor. Under normal physiological conditions, APT1 exists as a monomer through S-glutathionylation at C20, C22 and C37, which inhibits its enzymatic activity. Under oxidative conditions, APT1 senses the oxidative signal and is tetramerized, which makes it functional. Tetrameric APT1 depalmitoylates S-acetylated NAC (NACsa), and NACsa relocates to the nucleus, increases the cellular glutathione/oxidized glutathione (GSH/GSSG) ratio through the upregulation of glyoxalase I expression, and resists oxidative stress. When oxidative stress is alleviated, APT1 is found in monomeric form. Here, we describe a mechanism through which APT1 mediates a fine-tuned and balanced intracellular redox system in plant defence responses to biotic and abiotic stresses and provide insights into the design of stress-resistant crops.
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Affiliation(s)
- Tuo Ji
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, 100193, China
| | - Lihua Zheng
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, 100193, China
| | - Jiale Wu
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, 100193, China
| | - Mei Duan
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, 100193, China
| | - Qianwen Liu
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, 100193, China
| | - Peng Liu
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, 100193, China
| | - Chen Shen
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, 100193, China
| | - Jinling Liu
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, 100193, China
| | - Qinyi Ye
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, 100193, China
| | - Jiangqi Wen
- Institute for Agricultural Biosciences, Oklahoma State University, Ardmore, OK, 73401, USA
- Department of Plant and Soil Sciences, Oklahoma State University, Stillwater, OK, 74078, USA
| | - Jiangli Dong
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, 100193, China.
| | - Tao Wang
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, 100193, China.
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Xiang X, Guo Y, Chen Z, Zhang F, Huang J, Qin Y. A prognostic risk prediction model based on ferroptosis-related long non-coding RNAs in bladder cancer: A bulk RNA-seq research and scRNA-seq validation. Medicine (Baltimore) 2022; 101:e32558. [PMID: 36595859 PMCID: PMC9794272 DOI: 10.1097/md.0000000000032558] [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] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND To construct a prognostic risk model of bladder cancer (BC) from the perspective of long non-coding RNAs (lncRNAs) and ferroptosis, in order to guide clinical prognosis and identify potential therapeutic targets. METHODS In-hours BC samples were collected from 4 patients diagnosed with BC, who underwent radical cystectomy. Single cell transcriptome sequencing was performed and Seurat package were used for quality control and secondary analysis. LncRNAs expression profiles of BC samples were extracted from The Cancer Genome Atlas database. And sex, age, tumor, node, metastasis stage and other clinical data was downloaded at the same time. Ferroptosis-related lncRNAs were identified by co-expression analysis. We constructed a risk model by Cox regression and least absolute shrinkage and selection operator regression analyses. The predictive strength of the risk model for overall survival (OS) of patients with BC was evaluated by the log-rank test and Kaplan-Meier method. Finally, the enrichment analysis was performed and visualized. RESULTS We identified and included 15 prognostic ferroptosis-related lncRNAs (AL356740.1, FOXC2AS1, ZNF528AS1, LINC02535, PSMB8AS1, AL590428.1, AP000347.2, OCIAD1-AS1, AP001347.1, AC104986.2, AC018926.2, LINC00867, AC099518.4, USP30-AS1, and ARHGAP5-AS1), to build our ferroptosis-related lncRNAs risk model. Using this risk model, BC patients were divided into high and low-risk groups, and their respective survival lengths were calculated. The results showed that the OS of the low-risk group was significantly longer than that of the high-risk group. A nomogram was utilized to predict the survival rate of BC patients. As indicated in the nomogram, risk score was the most important indicator of OS in patients with BC. The ferroptosis-related lncRNAs risk model is an independent tool for prognostic risk assessment in patients with BC. Single cell transcriptome sequencing suggests that ferroptosis-related lncRNAs express specifically in BC tumor microenvironment. AL356740.1, LINC02535 and LINC00867 were mainly expressed in tumor cells. CONCLUSION The risk model based on the ferroptosis-related lncRNAs and the genomic clinico-pathological nomogram could be used to accurately predict the prognosis of patients with BC. The lncRNAs used to build this model might become potential therapeutic targets in the future.
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Affiliation(s)
- Xuebao Xiang
- Department of Urology, Affiliated Hospital of Guilin Medical College, Guilin, People’s Republic of China
- Centre for Genomic and Personalized Medicine, Guangxi Medical University, Nanning, People’s Republic of China
| | - Yi Guo
- Centre for Genomic and Personalized Medicine, Guangxi Medical University, Nanning, People’s Republic of China
| | - Zhongyuan Chen
- Centre for Genomic and Personalized Medicine, Guangxi Medical University, Nanning, People’s Republic of China
| | - Fangxin Zhang
- Centre for Genomic and Personalized Medicine, Guangxi Medical University, Nanning, People’s Republic of China
| | - Jiefu Huang
- Department of Urology, Affiliated Hospital of Guilin Medical College, Guilin, People’s Republic of China
| | - Yan Qin
- Department of Health Management, The People’s Hospital of Guangxi Zhuang Autonomous Region & Research center of Health Management, Guangxi Academy of Medical Sciences, Nanning, People’s Republic of China
- * Correspondence: Yan Qin, Department of Health Management, The People’s Hospital of Guangxi Zhuang Autonomous Region & Research center of Health Management, Guangxi Academy of Medical Sciences, Nanning, Guangxi 530021, People’s Republic of China (e-mail: )
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Jensen DM, Han P, Mangala LS, Lopez-Berestein G, Sood AK, Liu J, Kriegel AJ, Usa K, Widlansky ME, Liang M. Broad-acting therapeutic effects of miR-29b-chitosan on hypertension and diabetic complications. Mol Ther 2022; 30:3462-3476. [PMID: 35965413 PMCID: PMC9637778 DOI: 10.1016/j.ymthe.2022.08.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 07/18/2022] [Accepted: 08/09/2022] [Indexed: 11/23/2022] Open
Abstract
MicroRNA miR-29 promotes endothelial function in human arterioles in part by targeting LYPLA1 and increasing nitric oxide production. In addition, miR-29 is a master inhibitor of extracellular matrix gene expression, which may attenuate fibrosis but could also weaken tissue structure. The goal of this study was to test whether miR-29 could be developed as an effective, broad-acting, and safe therapeutic. Substantial accumulation of miR-29b and effective knockdown of Lypla1 in several mouse tissues were achieved using a chitosan-packaged, chemically modified miR-29b mimic (miR-29b-CH-NP) injected systemically at 200 μg/kg body weight. miR-29b-CH-NP, injected once every 3 days, significantly attenuated angiotensin II-induced hypertension. In db/db mice, miR-29b-CH-NP treatment for 12 weeks decreased cardiac and renal fibrosis and urinary albuminuria. In uninephrectomized db/db mice, miR-29b-CH-NP treatment for 20 weeks significantly improved myocardial performance index and attenuated proteinuria. miR-29b-CH-NP did not worsen abdominal aortic aneurysm in ApoE knockout mice treated with angiotensin II. miR-29b-CH-NP caused aortic root fibrotic cap thinning in ApoE knockout mice fed a high-cholesterol and high-fat diet but did not worsen the necrotic zone or mortality. In conclusion, systemic delivery of low-dose miR-29b-CH-NP is an effective therapeutic for several forms of cardiovascular and renal disease in mice.
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Affiliation(s)
- David M Jensen
- Department of Physiology, Center of Systems Molecular Medicine, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - Peng Han
- Department of Physiology, Center of Systems Molecular Medicine, Medical College of Wisconsin, Milwaukee, WI 53226, USA; Department of Urology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, China
| | - Lingegowda S Mangala
- Department of Gynecologic Oncology and Reproductive Medicine, UT MD Anderson Cancer Center, Houston, TX 77030, USA; Center for RNA Interference and Non-Coding RNA, UT MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Gabriel Lopez-Berestein
- Center for RNA Interference and Non-Coding RNA, UT MD Anderson Cancer Center, Houston, TX 77030, USA; Department of Experimental Therapeutics, UT MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Anil K Sood
- Department of Gynecologic Oncology and Reproductive Medicine, UT MD Anderson Cancer Center, Houston, TX 77030, USA; Center for RNA Interference and Non-Coding RNA, UT MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Jing Liu
- Department of Physiology, Center of Systems Molecular Medicine, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - Alison J Kriegel
- Department of Physiology, Center of Systems Molecular Medicine, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - Kristie Usa
- Department of Physiology, Center of Systems Molecular Medicine, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - Michael E Widlansky
- Division of Cardiovascular Medicine, Department of Medicine, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - Mingyu Liang
- Department of Physiology, Center of Systems Molecular Medicine, Medical College of Wisconsin, Milwaukee, WI 53226, USA.
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Paul BD. DUB'ling down uncovers an X-linked vulnerability in Alzheimer's disease. Cell 2022; 185:3854-3856. [PMID: 36240738 PMCID: PMC10029816 DOI: 10.1016/j.cell.2022.09.029] [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] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 09/14/2022] [Accepted: 09/16/2022] [Indexed: 11/07/2022]
Abstract
Although women are at higher risk for Alzheimer's disease and other tauopathies, the underlying mechanisms are unclear. In this issue of Cell, Yan et al. show that aberrantly high activity of X-linked USP11 deubiquitinase in women impairs clearance of tau, the principal component of neurofibrillary tangles in Alzheimer's disease.
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Affiliation(s)
- Bindu D Paul
- Department of Pharmacology and Molecular Sciences, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA; Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA; The Solomon H. Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA; Lieber Institute for Brain Development, Baltimore, MD 21205, USA.
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14
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Johnen P, Zimmermann S, Betz M, Hendriks J, Zimmermann A, Marnet M, De I, Zimmermann G, Kibat C, Cornaciu I, Mariaule V, Pica A, Clavel D, Márquez JA, Witschel M. Inhibition of acyl-ACP thioesterase as site of action of the commercial herbicides cumyluron, oxaziclomefone, bromobutide, methyldymron and tebutam. Pest Manag Sci 2022; 78:3620-3629. [PMID: 35604014 DOI: 10.1002/ps.7004] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 05/18/2022] [Accepted: 05/23/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND Understanding the mode and site of action of a herbicide is key for its efficient development, the evaluation of its toxicological risk, efficient weed control and resistance management. Recently, the mode of action (MoA) of the herbicide cinmethylin was identified in lipid biosynthesis with acyl-ACP thioesterase (FAT) as the site of action (SoA). Cinmethylin was registered for selective use in cereal crops for the control of grass weeds in 2020. RESULTS Here, we present a high-resolution co-crystal structure of FAT in complex with cumyluron identified by a high throughput crystallization screen. We show binding to and inhibition of FAT by cumyluron. Furthermore, in an array of experiments consisting of FAT binding assays, FAT inhibition assays, physiological and metabolic profiling, we tested compounds that are structurally related to cumyluron and identified the commercial herbicides oxaziclomefone, methyldymron, tebutam and bromobutide, with so far unknown sites of action, as FAT inhibitors. Additionally, we show that the previously described FAT inhibitors cinmethylin and methiozolin bind to FAT in a nanomolar range, inhibit FAT enzymatic activity and lead to similar metabolic changes. CONCLUSION Based on presented data, we corroborate cinmethylin and methiozolin as potent FAT inhibitors and identify FAT as the SoA of the herbicides cumyluron, oxaziclomefone, bromobutide, methyldymron and tebutam. © 2022 Society of Chemical Industry.
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Abstract
OBJECTIVE Ovarian cancer (OC) affects nearly 22,000 women annually in the United States and ranks fifth in cancer deaths, largely because of being diagnosed at an advanced stage. Autophagy is the cellular process of self-degrading damaged or degenerate proteins and organelles. Long non-coding RNAs (lncRNAs) are a group of RNA molecules whose transcripts are greater than 200 nt but are not translated into proteins. However, just a small number of autophagy-related lncRNAs have been explored in depth. METHODS We used RNA sequencing data from The Cancer Genome Atlas (TCGA) and autophagy datasets to identify dysfunctional autophagy-related lncRNAs and provide potential useful biomarkers for OC diagnosis and prognosis. RESULTS Seventeen differentially expressed lncRNAs (AC010186.3, AC006001.2, LBX2-AS1, SNHG17, AC011445.1, AC083880.1, MIR193BHG, AC025259.3, HCG14, AC007114.1, AC108673.2, USP30-AS1, AC010336.5, LINC01132, AC006333.2, LINC00665 and AC027348.1) were selected as independent prognostic factors for OC patients. Functional annotation of the data was performed through gene set enrichment analysis (GSEA). The results suggested that the high-risk group was mainly enriched in specific tumor-related and metabolism pathways. CONCLUSION Based on the online databases, we identified novel autophagy-related lncRNAs for the prognosis of ovarian cancer.
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Affiliation(s)
- Chan Meng
- Wuhan Children's Hospital (Wuhan Maternal and Child Healthcare Hospital), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Jie-Qiong Zhou
- Wuhan Children's Hospital (Wuhan Maternal and Child Healthcare Hospital), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
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Abstract
BACKGROUND Ubiquitin-specific protease 22 (USP22) alters histone ubiquitination and is considered to be an oncogenic factor involved in tumor progression. The USP22 aberrance has been implicated in several malignancies, but whether USP22 plays a role in neuroblastoma (NB) remains unclear. To the best of our knowledge, the clinicopathological significance of USP22 expression in NB has not been previously reported in the English-language medical literature. OBJECTIVES The aim of this study was to investigate the role of USP22 and its association with potential targets in patients with NB. MATERIAL AND METHODS The potential clinicopathological significance of USP22 expression in NB was studied using immunohistochemistry, immunohistochemical staining assessment and statistical analyses. RESULTS Based on the immunohistochemical analysis, the USP22 protein was detected more manifestly in NB tissues than in healthy peritumoral tissue. Furthermore, an association between USP22, lymph node metastasis and NB clinical stage was observed, whereby the level of USP22 protein was higher in stage III-IV specimens than in stage I-II specimens (p < 0.05). Furthermore, tumors expressing USP22 were associated with poorer patient prognosis than the USP22-negative tumors. The multivariate Cox regression analysis suggested that the level of USP22 protein is a predictive factor for survival (p < 0.05). CONCLUSIONS Our results indicate a significant association between USP22 level and poor prognosis in NB. Thus, USP22 represents a valuable biomarker for predicting the outcome of patients with NB.
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Affiliation(s)
- Qu Zhibo
- Department of Heptic Surgery, First Affiliated Hospital of Harbin Medical University, China
- Department of General Surgery, Harbin Children's Hospital, China
| | - Liu Lianxin
- Department of Heptic Surgery, First Affiliated Hospital of Harbin Medical University, China
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Wang M, Nie K, Cao H, Xu H, Fang Y, Tan T, Baeyens J, Liu L. Biosynthesis of medium chain length alkanes for bio-aviation fuel by metabolic engineered Escherichia coli. Bioresour Technol 2017; 239:542-545. [PMID: 28550989 DOI: 10.1016/j.biortech.2017.05.101] [Citation(s) in RCA: 4] [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] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Revised: 05/15/2017] [Accepted: 05/16/2017] [Indexed: 06/07/2023]
Abstract
The aim of this work was to study the synthesis of medium-chain length alkanes (MCLA), as bio-aviation product. To control the chain length of alkanes and increase the production of MCLA, Escherichia coli cells were engineered by incorporating (i) a chain length specific thioesterase from Umbellularia californica (UC), (ii) a plant origin acyl carrier protein (ACP) gene and (iii) the whole fatty acid synthesis system (FASs) from Jatropha curcas (JC). The genetic combination was designed to control the product spectrum towards optimum MCLA. Decanoic, lauric and myristic acid were produced at concentrations of 0.011, 0.093 and 1.657mg/g, respectively. The concentration of final products nonane, undecane and tridecane were 0.00062mg/g, 0.0052mg/g, and 0.249mg/g respectively. Thioesterase from UC controlled the fatty acid chain length in a range of 10-14 carbons and the ACP gene with whole FASs from JC significantly increased the production of MCLA.
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Affiliation(s)
- Meng Wang
- Beijing Bioprocess Key Laboratory, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Kaili Nie
- Beijing Bioprocess Key Laboratory, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Hao Cao
- Beijing Bioprocess Key Laboratory, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Haijun Xu
- Beijing Bioprocess Key Laboratory, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, PR China; College of Science, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Yunming Fang
- Beijing Bioprocess Key Laboratory, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Tianwei Tan
- Beijing Bioprocess Key Laboratory, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Jan Baeyens
- Beijing Advanced Innovation Centre for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, PR China; School of Engineering, University of Warwick, Coventry CV47AL, United Kingdom
| | - Luo Liu
- Beijing Bioprocess Key Laboratory, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, PR China.
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Sleat DE, Gedvilaite E, Zhang Y, Lobel P, Xing J. Analysis of large-scale whole exome sequencing data to determine the prevalence of genetically-distinct forms of neuronal ceroid lipofuscinosis. Gene 2016; 593:284-91. [PMID: 27553520 DOI: 10.1016/j.gene.2016.08.031] [Citation(s) in RCA: 26] [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: 05/04/2016] [Revised: 07/11/2016] [Accepted: 08/18/2016] [Indexed: 11/17/2022]
Abstract
The neuronal ceroid lipofuscinoses (NCLs) are a group of fatal, mostly recessive neurodegenerative lysosomal storage diseases. While clinically similar, they are genetically distinct and result from mutations in at least twelve different genes. Estimates of NCL incidence range from 0.6 to 14 per 100,000 live births but vary widely between populations and are influenced by whether patients are classified based upon clinical or genetic criteria. We investigated mutations in twelve NCL genes in ~61,000 individuals represented in the Exome Aggregation Consortium (ExAC) whole exome sequencing database. Variants were extracted from ExAC and pathogenic alleles were differentiated from neutral polymorphisms using annotated variant databases and missense mutation prediction tools. Carrier frequency was dependent on ethnicity, with the highest (1/75) observed for PPT1 in the Finnish. When data are adjusted for ethnic diversity within the USA, PPT1, TPP1 and CLN3 carrier frequencies were found to be the highest of the NCLs, each at ~1/500. Carrier frequencies calculated from ExAC correlated well with incidence estimated from numbers of living NCL patients in the US. In addition, the analysis identified numerous variants that are annotated as pathogenic in public repositories but have a predicted frequency that is not consistent with patient studies. These variants appear to be neutral polymorphisms that are reported as pathogenic without validation. Based upon literature reports, such alleles may be annotated in public databases as pathogenic and this propagates errors that can have clinical consequences.
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Affiliation(s)
- David E Sleat
- Center for Advanced Biotechnology and Medicine, Rutgers, The State University of New Jersey, Piscataway, NJ 08854, USA; Department of Biochemistry and Molecular Biology, Rutgers, The State University of New Jersey, Piscataway, NJ 08854, USA.
| | - Erika Gedvilaite
- Department of Genetics, Rutgers, The State University of New Jersey, Piscataway, NJ 08854, USA; Human Genetics Institute of New Jersey, Rutgers, The State University of New Jersey, Piscataway, NJ 08854, USA.
| | - Yeting Zhang
- Department of Genetics, Rutgers, The State University of New Jersey, Piscataway, NJ 08854, USA; Human Genetics Institute of New Jersey, Rutgers, The State University of New Jersey, Piscataway, NJ 08854, USA.
| | - Peter Lobel
- Center for Advanced Biotechnology and Medicine, Rutgers, The State University of New Jersey, Piscataway, NJ 08854, USA; Department of Biochemistry and Molecular Biology, Rutgers, The State University of New Jersey, Piscataway, NJ 08854, USA.
| | - Jinchuan Xing
- Department of Genetics, Rutgers, The State University of New Jersey, Piscataway, NJ 08854, USA; Human Genetics Institute of New Jersey, Rutgers, The State University of New Jersey, Piscataway, NJ 08854, USA.
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Miller JN, Kovács AD, Pearce DA. The novel Cln1(R151X) mouse model of infantile neuronal ceroid lipofuscinosis (INCL) for testing nonsense suppression therapy. Hum Mol Genet 2015; 24:185-96. [PMID: 25205113 PMCID: PMC4326326 DOI: 10.1093/hmg/ddu428] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2014] [Accepted: 08/19/2014] [Indexed: 11/13/2022] Open
Abstract
The neuronal ceroid lipofuscinoses (NCLs), also known as Batten disease, are a group of autosomal recessive neurodegenerative disorders in children characterized by the progressive onset of seizures, blindness, motor and cognitive decline and premature death. Patients with mutations in CLN1 primarily manifest with infantile NCL (INCL or Haltia-Santavuori disease), which is second only to congenital NCL for its age of onset and devastating progression. CLN1 encodes a lysosomal enzyme, palmitoyl-protein thioesterase 1 (PPT1). Nonsense mutations in CLN1 account for 52.3% of all disease causing alleles in infantile NCL, the most common of which worldwide is the p.R151X mutation. Previously, we have shown how nonsense-mediated decay is involved in the degradation of CLN1 mRNA transcripts containing the p.R151X mutation in human lymphoblast cell lines. We have also shown how the read-through drugs gentamicin and ataluren (PTC124) increase CLN1 (PPT1) enzyme activity. Here, we provide the initial characterization of the novel Cln1(R151X) mouse model of infantile neuronal ceroid lipofuscinosis that we have generated. This nonsense mutation model recapitulates the molecular, histological and behavioral phenotypes of the human disease. Cln1(R151X) mice showed a significant decrease in Cln1 mRNA level and PPT1 enzyme activity, accumulation of autofluorescent storage material, astrocytosis and microglial activation in the brain. Behavioral characterization of Cln1(R151X) mice at 3 and 5 months of age revealed significant motor deficits as measured by the vertical pole and rotarod tests. We also show how the read-through compound ataluren (PTC124) increases PPT1 enzyme activity and protein level in Cln1(R151X) mice in a proof-of-principle study.
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Affiliation(s)
- Jake N Miller
- Division of Basic Biomedical Sciences, Sanford School of Medicine of the University of South Dakota, Vermillion, SD, USA Sanford Children's Health Research Center, Sanford Research, Sioux Falls, SD, USA and
| | - Attila D Kovács
- Sanford Children's Health Research Center, Sanford Research, Sioux Falls, SD, USA and
| | - David A Pearce
- Division of Basic Biomedical Sciences, Sanford School of Medicine of the University of South Dakota, Vermillion, SD, USA Sanford Children's Health Research Center, Sanford Research, Sioux Falls, SD, USA and Department of Pediatrics, Sanford School of Medicine of the University of South Dakota, Sioux Falls, SD, USA
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20
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Aby E, Gumps K, Roth A, Sigmon S, Jenkins SE, Kim JJ, Kramer NJ, Parfitt KD, Korey CA. Mutations in palmitoyl-protein thioesterase 1 alter exocytosis and endocytosis at synapses in Drosophila larvae. Fly (Austin) 2013; 7:267-79. [PMID: 24091420 PMCID: PMC3896500 DOI: 10.4161/fly.26630] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [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: 07/10/2013] [Revised: 09/14/2013] [Accepted: 09/26/2013] [Indexed: 11/19/2022] Open
Abstract
Infantile-onset neuronal ceroid lipofuscinosis (INCL) is a severe pediatric neurodegenerative disorder produced by mutations in the gene encoding palmitoyl-protein thioesterase 1 (Ppt1). This enzyme is responsible for the removal of a palmitate group from its substrate proteins, which may include presynaptic proteins like SNAP-25, cysteine string protein (CSP), dynamin, and synaptotagmin. The fruit fly, Drosophila melanogaster, has been a powerful model system for studying the functions of these proteins and the molecular basis of neurological disorders like the NCLs. Genetic modifier screens and tracer uptake studies in Ppt1 mutant larval garland cells have suggested that Ppt1 plays a role in endocytic trafficking. We have extended this analysis to examine the involvement of Ppt1 in synaptic function at the Drosophila larval neuromuscular junction (NMJ). Mutations in Ppt1 genetically interact with temperature sensitive mutations in the Drosophila dynamin gene shibire, accelerating the paralytic behavior of shibire mutants at 27 °C. Electrophysiological work in NMJs of Ppt1-deficient larvae has revealed an increase in miniature excitatory junctional potentials (EJPs) and a significant depression of evoked EJPs in response to repetitive (10 hz) stimulation. Endocytosis was further examined in Ppt1-mutant larvae using FM1-43 uptake assays, demonstrating a significant decrease in FM1-43 uptake at the mutant NMJs. Finally, Ppt1-deficient and Ppt1 point mutant larvae display defects in locomotion that are consistent with alterations in synaptic function. Taken together, our genetic, cellular, and electrophysiological analyses suggest a direct role for Ppt1 in synaptic vesicle exo- and endocytosis at motor nerve terminals of the Drosophila NMJ.
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Affiliation(s)
- Elizabeth Aby
- Department of Biology; Pomona College; Claremont, CA USA
| | - Katherine Gumps
- Department of Biology; The College of Charleston; Charleston, SC USA
| | - Amalia Roth
- Department of Biology; Pomona College; Claremont, CA USA
| | - Stacey Sigmon
- Department of Biology; The College of Charleston; Charleston, SC USA
| | | | - Joyce J Kim
- Department of Biology; Pomona College; Claremont, CA USA
| | | | - Karen D Parfitt
- Department of Biology; Pomona College; Claremont, CA USA
- Program in Molecular Biology ; Pomona College; Claremont, CA USA
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Pezzini F, Gismondi F, Tessa A, Tonin P, Carrozzo R, Mole SE, Santorelli FM, Simonati A. Involvement of the mitochondrial compartment in human NCL fibroblasts. Biochem Biophys Res Commun 2011; 416:159-64. [PMID: 22100646 DOI: 10.1016/j.bbrc.2011.11.016] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2011] [Accepted: 11/03/2011] [Indexed: 11/17/2022]
Abstract
Neuronal ceroid lipofuscinosis (NCL) are a group of progressive neurodegenerative disorders of childhood, characterized by the endo-lysosomal storage of autofluorescent material. Impaired mitochondrial function is often associated with neurodegeneration, possibly related to the apoptotic cascade. In this study we investigated the possible effects of lysosomal accumulation on the mitochondrial compartment in the fibroblasts of two NCL forms, CLN1 and CLN6. Fragmented mitochondrial reticulum was observed in all cells by using the intravital fluorescent marker Mitotracker, mainly in the perinuclear region. This was also associated with intense signal from the lysosomal markers Lysotracker and LAMP2. Likewise, mitochondria appeared to be reduced in number and shifted to the cell periphery by electron microscopy; moreover the mitochondrial markers VDCA and COX IV were reduced following quantitative Western blot analysis. Whilst there was no evidence of increased cell death under basal condition, we observed a significant increase in apoptotic nuclei following Staurosporine treatment in CLN1 cells only. In conclusion, the mitochondrial compartment is affected in NCL fibroblasts invitro, and CLN1 cells seem to be more vulnerable to the negative effects of stressed mitochondrial membrane than CLN6 cells.
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Affiliation(s)
- Francesco Pezzini
- Department of Neurological, Psychological, Morphological and Motor Sciences, Divisions of Neurology (Child Neurology) and Neuropathology, University of Verona Medical School, Verona, Italy
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22
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Sarkar C, Zhang Z, Mukherjee AB. Stop codon read-through with PTC124 induces palmitoyl-protein thioesterase-1 activity, reduces thioester load and suppresses apoptosis in cultured cells from INCL patients. Mol Genet Metab 2011; 104:338-45. [PMID: 21704547 PMCID: PMC3220191 DOI: 10.1016/j.ymgme.2011.05.021] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2011] [Revised: 05/13/2011] [Accepted: 05/13/2011] [Indexed: 11/26/2022]
Abstract
Infantile neuronal ceroid lipofuscinosis (INCL), a lethal hereditary neurodegenerative lysosomal storage disorder, affects mostly children. It is caused by inactivating mutations in the palmitoyl-protein thioesterase-1(PPT1) gene. Nonsense mutations in a gene generate premature termination codons producing truncated,nonfunctional or deleterious proteins. PPT1 nonsense-mutations account for approximately 31% of INCL patients in the US. Currently, there is no effective treatment for this disease. While aminoglycosides such asgentamycin suppress nonsense mutations, inherent toxicity of aminoglycosides prohibits chronic use inpatients. PTC124 is a non-toxic compound that induces ribosomal read-through of premature termination codons. We sought to determine whether PTC124-treatment of cultured cells from INCL patients carrying nonsense mutations in the PPT1 gene would correct PPT1 enzyme-deficiency with beneficial effects. Our results showed that PTC124-treatment of cultured cells from INCL patients carrying PPT1 nonsense-mutations induced PPT1 enzymatic activity in a dose- and time-dependent manner. This low level of PPT1 enzyme activity induced by PTC124 is virtually identical to that induced by gentamycin-treatment. Even though only a modest increase in PPT1 activity was achieved by PTC124-treatment of INCL cells, this treatment reduced the levels of thioester (constituent of ceroid) load. Our results suggest that PTC124-treatment induces PPT1 enzymatic activity in cultured cells from INCL patients carrying PPT1 nonsense-mutations, and this modest enzymatic activity has demonstrable beneficial effects on these cells. The clinical relevance of these effects may be tested in animal models of INCL carrying nonsense mutations in the PPT1 gene.
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Affiliation(s)
| | | | - Anil B. Mukherjee
- To whom all correspondence should be addressed at: NIH, Bldg. 10, Rm 9D42, 10 Center Drive, Bethesda, MD 20892-1830, Phone: (301) 496-7213; FAX: (301) 402-6632,
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23
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Mueller OT, Coovadia A. Novel human pathological mutations. Gene symbol: PPT1. Disease: neuronal ceroid lipofuscinosis, juvenile. Hum Genet 2010; 127:490. [PMID: 21491624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Affiliation(s)
- O Thomas Mueller
- Pathology and Laboratory Medicine, All Children's Hospital, Saint Petersburg, FL 33701, USA.
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Abstract
Herein, we report on an in vitro kinetic activity analysis that demonstrates that the protein known as the Akt C-terminal modulator protein is a broad-range, high-activity acyl-CoA thioesterase. In vitro tests of possible activity regulation by product inhibition or by Akt1 binding gave negative results. Truncation mutants confined the thioesterase activity to the C-terminal domain, consistent with our threading model. The N-terminal domain of unknown fold and function was found to contribute to solubility.
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Affiliation(s)
- Hong Zhao
- Department of Chemistry and Chemical Biology, University of New Mexico, Albuquerque. New Mexico 87131
| | - Brian M. Martin
- Molecular Structure Unit, Laboratory of Neurotoxicology, National Institute of Mental Health, National Institutes of Health, Bethesda, Maryland 20892–1262
| | - Marco Bisoffi
- Molecular Structure Unit, Laboratory of Neurotoxicology, National Institute of Mental Health, National Institutes of Health, Bethesda, Maryland 20892–1262
| | - Debra Dunaway-Mariano
- Department of Chemistry and Chemical Biology, University of New Mexico, Albuquerque. New Mexico 87131
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25
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Franke TF. Akt-interacting proteins: attractive opposites. focus on "Carboxy-terminal modulator protein induces Akt phosphorylation and activation, thereby enhancing antiapoptotic, glycogen synthetic, and glucose uptake pathways". Am J Physiol Cell Physiol 2007; 293:C1768-70. [PMID: 17913839 DOI: 10.1152/ajpcell.00451.2007] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Thomas F Franke
- Department of Psychiatry, Milhauser Laboratories, NYU School of Medicine, New York, NY 10016, usa.
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26
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Ono H, Sakoda H, Fujishiro M, Anai M, Kushiyama A, Fukushima Y, Katagiri H, Ogihara T, Oka Y, Kamata H, Horike N, Uchijima Y, Kurihara H, Asano T. Carboxy-terminal modulator protein induces Akt phosphorylation and activation, thereby enhancing antiapoptotic, glycogen synthetic, and glucose uptake pathways. Am J Physiol Cell Physiol 2007; 293:C1576-85. [PMID: 17615157 DOI: 10.1152/ajpcell.00570.2006] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Carboxy-terminal modulator protein (CTMP) was identified as binding to the carboxy terminus of Akt and inhibiting the phosphorylation and activation of Akt. In contrast to a previous study, we found CTMP overexpression to significantly enhance Akt phosphorylation at both Thr(308) and Ser(473) as well as the kinase activity of Akt, while phosphatidylinositol 3-kinase (PI3-kinase) activity was unaffected. Translocation of Akt to the membrane fraction was also markedly increased in response to overexpression of CTMP, with no change in the whole cellular content of Akt. Furthermore, the phosphorylations of GSK-3beta and Foxo1, well-known substrates of Akt, were increased by CTMP overexpression. On the other hand, suppression of CTMP with small interfering RNA partially but significantly attenuated this Akt phosphorylation. The cellular activities reportedly mediated by Akt activation were also enhanced by CTMP overexpression. UV-B-induced apoptosis of HeLa cells was significantly reversed not only by overexpression of the active mutant of Akt (myr-Akt) but also by that of CTMP. Increases in glucose transport activity and glycogen synthesis were also induced by overexpression of either myr-Akt or CTMP in 3T3-L1 adipocytes. Taking these results into consideration, it can be concluded that CTMP induces translocation of Akt to the membrane and thereby increases the level of Akt phosphorylation. As a result, CTMP enhances various cellular activities that are principally mediated by the PI3-kinase/Akt pathway.
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Affiliation(s)
- Hiraku Ono
- Department of Endocrinology and Metabolism, Institute for Adult Disease, Asahi Life Foundation, Tokyo
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27
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Barry RE, Allan BB, Cummins EP, Kattla JJ, Giblin A, Scally N, Taylor CT, Brazil DP. Enhanced sensitivity of protein kinase B/Akt to insulin in hypoxia is independent of HIF1α and promotes cell viability. Eur J Cell Biol 2007; 86:393-403. [PMID: 17544543 DOI: 10.1016/j.ejcb.2007.04.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2006] [Revised: 04/25/2007] [Accepted: 04/25/2007] [Indexed: 12/13/2022] Open
Abstract
Maintenance of oxygen homeostasis is a key requirement to ensure normal mammalian cell growth and differentiation. Hypoxia arises when oxygen demand exceeds supply, and is a feature of multiple human diseases including stroke, cancer and renal fibrosis. We have investigated the effect of hypoxia on kidney cells, and observed that insulin-induced cell viability is increased in hypoxia. We have characterized the role of protein kinase B (PKB/Akt) in these cells as a potential mediator of this effect. PKB/Akt activity was increased by low oxygen concentrations in kidney cells, and insulin-stimulated activation of PKB/Akt was stronger, more rapid and more sustained in hypoxia. Reduction of HIF1alpha levels using antimycin-A or siRNA targeting HIF1alpha did not affect PKB/Akt activation in hypoxia. Pharmacologic stabilization of HIF1alpha independent of hypoxia did not increase insulin-stimulated PKB/Akt activation. Although increased insulin-stimulated cell viability was observed in hypoxia, no differences in the degree of insulin-stimulated glucose uptake were observed in L6 muscle cells in hypoxia compared to normoxia. Thus, PKB/Akt may regulate specific cellular responses to growth factors such as insulin under adverse conditions such as hypoxia.
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Affiliation(s)
- Robert E Barry
- UCD School of Medicine and Medical Science, UCD Conway Institute, University College Dublin, Belfield, Dublin 4, Ireland
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28
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Abstract
Infantile neuronal ceroid lipofuscinosis (INCL) is a pediatric neurodegenerative disease caused by mutations in the human CLN1 gene. CLN1 encodes palmitoyl-protein thioesterase 1 (PPT1), suggesting an important role for the regulation of palmitoylation in normal neuronal function. To further elucidate Ppt1 function, we performed a gain-of-function modifier screen in Drosophila using a collection of enhancer-promoter transgenic lines to suppress or enhance the degeneration produced by overexpression of Ppt1 in the adult visual system. Modifier genes identified in our screen connect Ppt1 function to synaptic vesicle cycling, endo-lysosomal trafficking, synaptic development, and activity-dependent remodeling of the synapse. Furthermore, several homologs of the modifying genes are known to be regulated by palmitoylation in other systems and may be in vivo substrates for Ppt1. Our results complement recent work on mouse Ppt1(-/-) cells that shows a reduction in synaptic vesicle pools in primary neuronal cultures and defects in endosomal trafficking in human fibroblasts. The pathways and processes implicated by our modifier loci shed light on the normal cellular function of Ppt1. A greater understanding of Ppt1 function in these cellular processes will provide valuable insight into the molecular etiology of the neuronal dysfunction underlying the disease.
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Affiliation(s)
- Haley Buff
- Department of Biology, The College of Charleston, Charleston, South Carolina 29424, USA
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29
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Ramadan H, Al-Din AS, Ismail A, Balen F, Varma A, Twomey A, Watts R, Jackson M, Anderson G, Green E, Mole SE. Adult neuronal ceroid lipofuscinosis caused by deficiency in palmitoyl protein thioesterase 1. Neurology 2007; 68:387-8. [PMID: 17261688 DOI: 10.1212/01.wnl.0000252825.85947.2f] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- H Ramadan
- Neurology Department, Mid Yorkshire NHS Trust, Wakefield, Yorkshire, UK
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30
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Schick V, Majores M, Engels G, Spitoni S, Koch A, Elger CE, Simon M, Knobbe C, Blümcke I, Becker AJ. Activation of Akt independent of PTEN and CTMP tumor-suppressor gene mutations in epilepsy-associated Taylor-type focal cortical dysplasias. Acta Neuropathol 2006; 112:715-25. [PMID: 17013611 DOI: 10.1007/s00401-006-0128-y] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2006] [Revised: 07/28/2006] [Accepted: 07/28/2006] [Indexed: 01/18/2023]
Abstract
Focal cortical dysplasias (FCD) with Taylor-type balloon cells (FCD(IIb)) are frequently observed in biopsy specimens of patients with pharmacoresistant focal epilepsies. The molecular pathogenesis of FCD(IIb), which lack familial inheritance, is only poorly understood. Due to their highly differentiated, malformative nature and glioneuronal phenotype, FCD(IIb) share neuropathological characteristics with lesions observed in familial disorders such as cortical tubers present in patients with autosomal dominant tuberous sclerosis complex (TSC), related to mutations in the TSC1 or TSC2 genes, and dysplastic gangliocytomas of the cerebellum found in Cowden disease. Current data have indicated distinct allelic variants of TSC1 to accumulate in FCD(IIb). TSC1 represents a tumor suppressor operating in the phosphatidylinositol 3-kinase (PI3K)/insulin pathway. The tumor-suppressor gene PTEN is mutated in Cowden disease. Like PTEN, also carboxyl-terminal modulator protein (CTMP) modulates PI3K-pathway signaling, both via inhibition of Akt/PKB, a kinase inactivating the TSC1/TSC2 complex. Here, we have analyzed alterations of Akt, PTEN and CTMP relevant for insulin signaling upstream of TSC1/TSC2 in FCD(IIb). Immunohistochemistry with antibodies against phosphorylated Akt (phospho-Akt; Ser 473) in FCD(IIb) (n=23) showed strong phospho-Akt expression in dysplastic FCD(IIb) components. We have further studied sequence alterations of PTEN (n=34 FCD(IIb)) and CTMP (n=20 FCD(IIb)) by laser microdissection/single-strand conformation polymorphism analysis. We observed a somatic mutation in an FCD(IIb), i.e., amino-acid exchange at nucleotide position 834 (PTEN cDNA, GenBank AH007803.1) in exon 8 with replacement of phenylalanine by leucine (F278L). We also found several silent polymorphisms of PTEN in exon 2 and exon 8 as well as silent and coding polymorphisms but no mutations in CTMP. No loss of heterozygosity in FCD(IIb) (n=6) at 10q23 was observed. To our knowledge, we here report on the first somatic mutation of a tumor-suppressor gene, i.e., PTEN, in FCD(IIb). However, our study also demonstrates that mutational alterations of PTEN and CTMP do not play major pathogenetic roles for activation of Akt in FCD(IIb). Future studies need to determine the origin of insulin pathway activation upstream of TSC1/TSC2 in FCD(IIb).
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Affiliation(s)
- Volker Schick
- Department of Neuropathology, University of Bonn Medical Center, Sigmund-Freud-Str. 25, 53105, Bonn, Germany
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Bessa C, Teixeira CAF, Mangas M, Dias A, Sá Miranda MC, Guimarães A, Ferreira JC, Canas N, Cabral P, Ribeiro MG. Two novel CLN5 mutations in a Portuguese patient with vLINCL: insights into molecular mechanisms of CLN5 deficiency. Mol Genet Metab 2006; 89:245-53. [PMID: 16814585 DOI: 10.1016/j.ymgme.2006.04.010] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2006] [Revised: 04/09/2006] [Accepted: 04/09/2006] [Indexed: 11/22/2022]
Abstract
The neuronal ceroid-lipofuscinoses are the most common neurodegenerative disorders in childhood characterized by progressive blindness, epilepsy, brain atrophy, and premature death. Based on the age at onset, disease progression and ultrastructural features three classical (infantile, late-infantile, and juvenile) and three variant late-infantile forms are generally distinguished (Finnish variant, Costa Rican variant, and epilepsy with progressive motor retardation). The Finnish variant late-infantile form has been associated with CLN5 gene defects, with only five mutations described to date. We report a patient with vLINCL/CLN5 who represents the first evidence of the disease in the Portuguese population. Mutational screening revealed the previously described missense mutation c.835G>A (D279N) inherited from the mother, and two novel mutations, c.565C>T (Q189X) and c.335G>C (R112P) from paternal and maternal inheritance, respectively. Based on data here reported: (i) the number of possible mutations in CLN5 gene is now 7; (ii) the CLN5 Portuguese case represents the third description of the disease outside northern Europe; (iii) the CLN5/mRNA expression level reduced to 45% supports the existence of one mRNA non-producing allele, further noticeable at the protein level; (iv) Western blotting data using a specific antibody to human CLN5p provided evidence for the presence of four integral membrane isoforms in human fibroblasts; (v) data from differential expression of CLN2, CLN3, and CLN5 suggest down-regulation of CLN3 gene expression in CLN2 and CLN5-deficient human patients and this observation strengths the hypothesis of functional redundancy of the CLN system.
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Affiliation(s)
- C Bessa
- Unidade de Enzimologia, Instituto de Genética Médica Jacinto Magalhães, Porto, Portugal
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32
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Leman AR, Polochock S, Mole SE, Pearce DA, Rothberg PG. Homogeneous PCR nucleobase quenching assays to detect four mutations that cause neuronal ceroid lipofuscinosis: T75P and R151X in CLN1, and IVS5-1G>C and R208X in CLN2. J Neurosci Methods 2006; 157:124-31. [PMID: 16720047 DOI: 10.1016/j.jneumeth.2006.04.015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2005] [Revised: 04/12/2006] [Accepted: 04/12/2006] [Indexed: 11/24/2022]
Abstract
The neuronal ceroid lipofuscinoses (NCLs) are a family of autosomal recessive lysosomal storage diseases characterized by progressive epilepsy, dementia and visual loss. The juvenile form of the disease (onset age 4-8 years with visual loss) is usually caused by mutations in the CLN3 gene, but some cases have been shown to be due to specific mutations in the CLN1 or CLN2 genes, which are usually associated with NCL with onset in infancy or late infancy, respectively. The CLN1 mutations T75P and R151X, and the CLN2 mutations R208X and IVS5-1G>C, are found in many NCL patients with a juvenile presentation that is not due to CLN3 mutation. We have developed and validated a set of assays for these mutations using PCR followed by differential melting of a fluorescently labeled oligo probe, on a Roche LightCycler platform. The nucleobase quenching phenomenon was used to detect probe hybridization. The tests were validated using alternate assays: PCR followed by allele specific restriction enzyme digestion for the CLN1 mutations, and PCR followed by sequencing for the CLN2 mutations. The homogeneous PCR method gave 100% concordance of results with the alternate methods. This new assay, combined with a test for the common 1 kbp deletion in the CLN3 gene, provides a set of DNA-based assays suitable for detection of the most common mutations causing NCL with onset in the juvenile age range.
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Affiliation(s)
- Adam R Leman
- Department of Pathology and Laboratory Medicine, University of Rochester Medical Center, 601 Elmwood Ave., Box 626, Rochester, NY 14642, USA
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33
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Kyttälä A, Lahtinen U, Braulke T, Hofmann SL. Functional biology of the neuronal ceroid lipofuscinoses (NCL) proteins. Biochim Biophys Acta 2006; 1762:920-33. [PMID: 16839750 DOI: 10.1016/j.bbadis.2006.05.007] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2006] [Revised: 05/19/2006] [Accepted: 05/23/2006] [Indexed: 11/28/2022]
Abstract
Neuronal ceroid lipofucinoses (NCLs) are a group of severe neurodegenerative disorders characterized by accumulation of autofluorescent ceroid lipopigment in patients' cells. The different forms of NCL share many similar pathological features but result from mutations in different genes. The genes affected in NCLs encode both soluble and transmembrane proteins and are localized to ER or to the endosomes/lysosomes. Due to selective vulnerability of the central nervous system in the NCL disorders, the corresponding proteins are proposed to have important, tissue specific roles in the brain. The pathological similarities of the different NCLs have led not only to the grouping of these disorders but also to suggestion that the NCL proteins function in the same biological pathway. Despite extensive research, including the development of several model organisms for NCLs and establishment of high-throughput techniques, the precise biological function of many of the NCL proteins has remained elusive. The aim of this review is to summarize the current knowledge of the functions, or proposed functions, of the different NCL proteins.
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Affiliation(s)
- Aija Kyttälä
- National Public Health Institute, Department of Molecular Medicine, Biomedicum Helsinki, Helsinki, Finland.
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34
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Abstract
The neuronal ceroid-lipofuscinoses (NCLs) are inherited lysosomal storage diseases and constitute the most common group of children's progressive encephalopathies. Most childhood forms of NCL are clinically characterized by progressive loss of vision as well as mental and motor deterioration, epileptic seizures, and premature death, while the rare adult forms are dominated by dementia. All forms of NCL share common pathomorphological features. Autofluorescent, periodic acid-Schiff- and Sudan black B-positive granules, resistant to lipid solvents, accumulate in the cytoplasm of most nerve cells, and there is progressive and remarkably selective neuronal degeneration and loss. For a long time, the NCLs were grouped under the heading of the "amaurotic family idiocies" and conceived as lipidoses. However, in the late 1980s and 1990s the NCL storage cytosomes were shown to consist largely of two hydrophobic proteins: either subunit c of mitochondrial ATP synthase or sphingolipid activator proteins A and D. Since 1995 numerous mutations in at least seven different genes have been shown to underlie the multiple human and animal forms of NCL. This review discusses the historical evolution of the NCL concept and the impact of the recent biochemical and molecular genetic findings on our views on the classification and pathogenesis of these devastating brain disorders.
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Affiliation(s)
- Matti Haltia
- Department of Pathology, University of Helsinki and Helsinki University Central Hospital, Helsinki, Finland.
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Siintola E, Lehesjoki AE, Mole SE. Molecular genetics of the NCLs -- status and perspectives. Biochim Biophys Acta Mol Basis Dis 2006; 1762:857-64. [PMID: 16828266 DOI: 10.1016/j.bbadis.2006.05.006] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2006] [Accepted: 05/23/2006] [Indexed: 11/19/2022]
Abstract
The neuronal ceroid lipofuscinoses (NCLs) are a group of inherited neurodegenerative disorders characterized by the accumulation of autofluorescent storage material in many cell types, including neurons. Most NCL subtypes are inherited in an autosomal recessive manner and characterized clinically by epileptic seizures, progressive psychomotor decline, visual failure, variable age of onset, and premature death. To date, seven genes underlying human NCLs have been identified. Most of the mutations in these genes are associated with specific disease subtypes, while some result in variable disease onset, severity and progression. In addition to these, there are still disease subgroups with unknown molecular genetic backgrounds. Although apparent clinical homogeneity exists within some of these subgroups, actual genetic heterogeneity may complicate gene identification. Additional clues to the identification of these unknown genes may come from animal models of NCL and from functional studies of already known genes which may suggest further candidates.
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Affiliation(s)
- Eija Siintola
- Folkhälsan Institute of Genetics, Department of Medical Genetics and Neuroscience Center, Biomedicum Helsinki, University of Helsinki, Finland.
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Wang J, Meers J, Spradbrow PB, Robinson WF. Evaluation of immune effects of fowlpox vaccine strains and field isolates. Vet Microbiol 2006; 116:106-19. [PMID: 16650660 DOI: 10.1016/j.vetmic.2006.03.012] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2006] [Revised: 03/01/2006] [Accepted: 03/17/2006] [Indexed: 10/24/2022]
Abstract
The immune effects of fowlpox virus (FPV) field isolates and vaccine strains were evaluated in chickens infected at the age of 1 day and 6 weeks. The field isolates and the obsolete vaccine strain (FPV S) contained integrated reticuloendotheliosis virus (REV) provirus, while the current vaccine strain (FPVST) carries only REV LTR sequences. An indirect antibody ELISA was used to measure the FPV-specific antibody response. The non-specific humoral response was evaluated by injection of two T-cell-dependent antigens, sheep red blood cells (SRBC) and bovine serum albumin (BSA). There was no significant difference in the antibody response to FPV between chickens infected with FPV various isolates and strains at either age. In contrast, antibody responses to both SRBC and BSA were significantly lower in 1-day-old chickens inoculated with field isolates and FPV S at 2-3 weeks post-inoculation. Furthermore, cell-mediated immune (CMI) responses measured by in vitro lymphocyte proliferation assay and in vivo using a PHA-P skin test were significantly depressed in chickens inoculated with field isolates and FPV S at the same periods. In addition, thymus and bursal weights were lower in infected chickens. These immunosuppressive effects were not observed in chickens inoculated with the current vaccine strain, FPVST, at any time. The results of this study suggest that virulent field isolates and FPV S have immunosuppressive effects when inoculated into young chickens, which appeared in the first 3 weeks post infection. REV integrated in the FPV field isolates and FPV S may have played a central role in the development of immunosuppression.
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Affiliation(s)
- Jianning Wang
- Investigation & Diagnostic Centre-Wallaceville, Biosecurity New Zealand, Ministry of Agriculture & Forestry, Ward Street, Upper Hutt 6007, New Zealand.
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Bonsignore M, Tessa A, Di Rosa G, Piemonte F, Dionisi-Vici C, Simonati A, Calamoneri F, Tortorella G, Santorelli FM. Novel CLN1 mutation in two Italian sibs with late infantile neuronal ceroid lipofuscinosis. Eur J Paediatr Neurol 2006; 10:154-6. [PMID: 16759889 DOI: 10.1016/j.ejpn.2006.04.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2005] [Revised: 04/27/2006] [Accepted: 04/28/2006] [Indexed: 10/24/2022]
Abstract
We detected a novel CLN1 mutation (c.125-15t>g) in two Italian siblings. The clinical phenotype is that of a variant late-infantile neuronal ceroid lipofuscinosis and consisted of early-onset visual loss, psychomotor deterioration, and seizures. Ultrastructurally, granular osmiophilic deposits were found in skin biopsy of both patients. The novel mutation occurs in the acceptor sequences for splicing and leads to skipping of multiple exons. This predicts a protein lacking part or all of the active site of the enzyme and the palmitate-binding pocket. Consequently, biochemical activity of the palmitoyl protein thioesterase-1 enzyme was drastically reduced. The new mutation was not identified in a large set of ethnically matched control chromosomes. Our findings support the notion that CLN1 patients are not rare in Southern Europe and facilitate DNA-based mutation and carrier testing in this family.
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Affiliation(s)
- Maria Bonsignore
- Division of Infantile, Neuropsychiatry, Department of Medical and Surgical Pediatrics, University of Messina, via Consolare Valeria 98125 Messina, Italy.
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Kim SJ, Zhang Z, Lee YC, Mukherjee AB. Palmitoyl-protein thioesterase-1 deficiency leads to the activation of caspase-9 and contributes to rapid neurodegeneration in INCL. Hum Mol Genet 2006; 15:1580-6. [PMID: 16571600 DOI: 10.1093/hmg/ddl078] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.8] [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: 02/01/2023] Open
Abstract
The infantile neuronal ceroid lipofuscinosis (INCL), a rare (one in 100 000 births) but one of the most lethal inherited neurodegenerative storage disorders of childhood, is caused by inactivating mutations in the palmitoyl-protein thioesterase-1 (PPT1) gene. PPT1 cleaves thioester linkages in s-acylated (palmitoylated) proteins and facilitates their degradation and/or recycling. Thus, PPT1-deficiency leads to an abnormal intracellular accumulation of s-acylated proteins causing INCL pathogenesis. Although neuronal apoptosis is the suggested cause of neurodegeneration in this disease, the molecular mechanism(s) remains poorly understood. We recently reported that one of the major pathways of neuronal apoptosis in PPT1-knockout (PPT1-KO) mice that mimic INCL, is mediated by endoplasmic reticulum (ER) stress-induced caspase-12 activation. ER stress also increases the production of reactive oxygen species (ROS), disrupts Ca(2+) homeostasis and increases the potential for destabilizing mitochondrial membrane. Mitochondrial membrane destabilization activates caspase-9 present in this organelle, and can mediate apoptosis. We report here that the levels of superoxide dismutase (SOD), most likely induced by ROS, in human INCL as well as PPT1-KO mouse brain tissues are markedly elevated. Moreover, we demonstrate that activated caspase-3 and cleaved-PARP, indicative of apoptosis, are also increased in these tissues. Using cultured neurospheres from PPT1-KO and wild-type mouse fetuses, we further demonstrate that the levels of ROS, SOD-2, cleaved-caspase-9, activated caspase-3 and cleaved-PARP are elevated. We propose that: (i) ER stress due to PPT1-deficiency increases ROS and disrupts calcium homeostasis activating caspase-9 and (ii) caspase-9 activation mediates caspase-3 activation and apoptosis contributing to rapid neurodegeneration in INCL.
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Affiliation(s)
- Sung-Jo Kim
- Section on Developmental Genetics, Heritable Disorders Branch, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland 20892-1830, USA
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Paulsson K, Békássy AN, Olofsson T, Mitelman F, Johansson B, Panagopoulos I. A novel and cytogenetically cryptic t(7;21)(p22;q22) in acute myeloid leukemia results in fusion of RUNX1 with the ubiquitin-specific protease gene USP42. Leukemia 2006; 20:224-9. [PMID: 16357831 DOI: 10.1038/sj.leu.2404076] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Although many of the chromosomal abnormalities in hematologic malignancies are identifiable cytogenetically, some are only detectable using molecular methods. We describe a novel cryptic t(7;21)(p22;q22) in acute myeloid leukemia (AML). FISH, 3'RACE, and RT-PCR revealed a fusion involving RUNX1 and the ubiquitin-specific protease (USP) gene USP42. The genomic breakpoint was in intron 7 of RUNX1 and intron 1 of USP42. The reciprocal chimera was not detected - neither on the transcriptional nor on the genomic level - and FISH showed that the 5' part of USP42 was deleted. USP42 maps to a 7p22 region characterized by segmental duplications. Notably, 17 kb duplicons are present 1 Mb proximal to USP42 and 3 Mb proximal to RUNX1; these may be important in the genesis of t(7;21). This is the second cryptic RUNX1 translocation in hematologic malignancies and the first in AML. The USPs have not previously been reported to be rearranged in leukemias. The cellular context in which USP42 is active is unknown, but we here show that it is expressed in normal bone marrow, in primary AMLs, and in cancer cell lines. Its involvement in the t(7;21) suggests that deregulation of ubiquitin-associated pathways may be pathogenetically important in AML.
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MESH Headings
- Acute Disease
- Cell Line, Tumor
- Child
- Chromosomes, Human, Pair 21/genetics
- Chromosomes, Human, Pair 7/genetics
- Core Binding Factor Alpha 2 Subunit/genetics
- Cytogenetic Analysis/methods
- Endopeptidases/genetics
- Gene Expression Profiling
- Gene Rearrangement
- Humans
- In Situ Hybridization, Fluorescence/methods
- Leukemia, Myeloid/genetics
- Male
- Oncogene Proteins, Fusion/genetics
- RNA, Messenger/genetics
- Reverse Transcriptase Polymerase Chain Reaction/methods
- Thiolester Hydrolases
- Transcription, Genetic
- Translocation, Genetic
- Ubiquitin-Specific Proteases
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Affiliation(s)
- K Paulsson
- Department of Clinical Genetics, Lund University Hospital, Lund, Sweden.
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Ju W, Wronska A, Moroziewicz DN, Zhong R, Wisniewski N, Jurkiewicz A, Fiory M, Wisniewski KE, Johnston L, Brown WT, Zhong N. Genotype-phenotype analyses of classic neuronal ceroid lipofuscinosis (NCLs): genetic predictions from clinical and pathological findings. Beijing Da Xue Xue Bao Yi Xue Ban 2006; 38:41-8. [PMID: 16415965] [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] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
OBJECTIVE Genotype-phenotype associations were studied in 517 subjects clinically affected by classical neuronal ceroid lipofuscinosis (NCL). METHODS Genetic loci CLN1-3 were analyzed in regard to age of onset, initial neurological symptoms, and electron microscope (EM) profiles. RESULTS The most common initial symptom leading to a clinical evaluation was developmental delay (30%) in NCL1, seizures (42.4%) in NCL2, and vision problems (53.5%) in NCL3. Eighty-two percent of NCL1 cases had granular osmiophilic deposits (GRODs) or mixed-GROD-containing EM profiles; 94% of NCL2 cases had curvilinear (CV) or mixed-CV-containing profiles; and 91% of NCL3 had fingerprint (FP) or mixed-FP-containing profiles. The mixed-type EM profile was found in approximately one-third of the NCL cases. DNA mutations within a specific CLN gene were further correlated with NCL phenotypes. Seizures were noticed to associate with common mutations 523G>A and 636C>T of CLN2 in NCL2 but not with common mutations 223G>A and 451C>T of CLN1 in NCL1. Vision loss was the initial symptom in all types of mutations in NCL3. Surprisingly, our data showed that the age of onset was atypical in 51.3% of NCL1 (infantile form) cases, 19.7% of NCL2 (late-infantile form) cases, and 42.8% of NCL3 (juvenile form) cases. CONCLUSION Our data provide an overall picture regarding the clinical recognition of classical childhood NCLs. This may assist in the prediction and genetic identification of NCL1-3 via their characteristic clinical features.
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Affiliation(s)
- Weina Ju
- SCL-Molecular Neurogenetic Diagnostic Laboratory, New York State Institute for Basic Research in Developmental Disabilities, Staten Island, NY 10314, USA
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Tsukamoto T, Iida J, Dobashi Y, Furukawa T, Konishi F. Overexpression in colorectal carcinoma of two lysosomal enzymes, CLN2 and CLN1, involved in neuronal ceroid lipofuscinosis. Cancer 2006; 106:1489-97. [PMID: 16518810 DOI: 10.1002/cncr.21764] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
BACKGROUND Lysosomal proteases are implicated in cancer progression and metastasis. In the current study, using subtraction cloning for genes that are differentially expressed in metastasis, the authors isolated a clone encoding ceroid lipofuscinosis, neuronal 2 (CLN2), which is a lysosomal serine protease defective in neuronal ceroid lipofuscinosis (NCL). Increased CLN2 activity has been reported in breast carcinoma and the antiapoptotic effect of another causative gene of NCL, ceroid lipofuscinosis, neuronal 1 (CLN1), is known. METHODS The mRNA levels of CLN2, CLN1, and cathepsins B, D, H, and L were investigated in colorectal carcinoma patients with different clinical stages using real-time quantitative reverse transcriptase polymerase chain reaction. A polyclonal antibody was raised against a recombinant CLN2 protein for immunoblotting and immunohistochemistry. RESULTS The mRNA levels of CLN1 and cathepsins B, D, and L were significantly higher in metastatic lesions than in primary tumors. In the primary tumors, mRNA expressions of CLN2 and cathepsin D were associated with advanced clinical stages (P < .015 and P < .031, respectively). Among the lysosomal enzymes examined, only the mRNA expression of CLN2 in both the primary tumors of all patients and the pT3 tumors was correlated with the presence of liver metastases (P < .0049 and P < .029, respectively). The polyclonal antibody prepared in the current study demonstrated CLN2 overexpression by immunoblotting and immunohistochemistry. CONCLUSIONS The results indicate that there is a close correlation between CLN2 and CLN1 expression and colorectal carcinoma progression and metastasis and suggest that they may be potential molecular targets.
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Affiliation(s)
- Toshihiko Tsukamoto
- Department of Biochemistry, School of Pharmaceutical Sciences, Kitasato University, Tokyo, Japan.
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42
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Affiliation(s)
- I Lahortiga
- Department of Human Genetics, Flanders Interuniversity Institute for Biotechnology (VIB), University of Leuven, Leuven, Belgium
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Mole SE, Williams RE, Goebel HH. Correlations between genotype, ultrastructural morphology and clinical phenotype in the neuronal ceroid lipofuscinoses. Neurogenetics 2005; 6:107-26. [PMID: 15965709 DOI: 10.1007/s10048-005-0218-3] [Citation(s) in RCA: 208] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2004] [Accepted: 02/03/2005] [Indexed: 12/23/2022]
Abstract
The neuronal ceroid lipofuscinoses (NCLs) are a group of severe neurodegenerative diseases with onset usually in childhood and characterised by the intracellular accumulation of autofluorescent storage material. Within the last decade, mutations that cause NCL have been found in six human genes (CLN1, CLN2, CLN3, CLN5, CLN6 and CLN8). Mutations in two additional genes cause disease in animal models that share features with NCL-CTSD in sheep and mice and PPT2 in mice. Approximately 160 NCL disease-causing mutations have now been described (listed and fully cited in the NCL Mutation Database, http://www.ucl.ac.uk/ncl/ ). Most mutations result in a classic morphology and disease phenotype, but some mutations are associated with disease that is of later onset, less severe or protracted in its course, or with atypical morphology. Seven common mutations exist, some having a worldwide distribution and others associated with families originating from specific geographical regions. This review attempts to correlate the gene, disease-causing mutation, morphology and clinical phenotype for each type of NCL.
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Affiliation(s)
- Sara E Mole
- MRC Laboratory for Molecular Cell Biology and Department of Paediatrics and Child Health, University College London, Gower Street, London, WC1E 6BT, UK.
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Kohan R, Noher de Halac I, Tapia Anzolini V, Cismondi A, Oller Ramírez AM, Paschini Capra A, de Kremer RD. Palmitoyl Protein Thioesterase1 (PPT1) and Tripeptidyl Peptidase-I (TPP-I) are expressed in the human saliva. A reliable and non-invasive source for the diagnosis of infantile (CLN1) and late infantile (CLN2) neuronal ceroid lipofuscinoses. Clin Biochem 2005; 38:492-4. [PMID: 15820783 DOI: 10.1016/j.clinbiochem.2004.12.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2004] [Revised: 12/17/2004] [Accepted: 12/21/2004] [Indexed: 11/19/2022]
Affiliation(s)
- Romina Kohan
- CEMECO, Hospital de Niños de la Provincia de Córdoba, Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Ferroviarios 1250, Córdoba (5014), Argentina
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Taschner PEM, Losekoot M, Breuning MH, Hofman I, van Diggelen OP. [From gene to disease; from CLN1, CLN2 and CLN3 to neuronal ceroid lipofuscinosis]. Ned Tijdschr Geneeskd 2005; 149:300-3. [PMID: 15730038] [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] [Subscribe] [Scholar Register] [Indexed: 05/01/2023]
Abstract
The neuronal ceroid lipofuscinoses (NCL) are worldwide the most common lysosomal storage disorders of childhood. Clinical features often include progressive visual impairment, seizures, psychomotor deterioration, dementia, and premature death. Most NCL cases are caused by mutations in the CLN1, CLN2 and CLN3 genes, which play an essential role in lysosomal protein degradation. Laboratory diagnostics for a patient suspected of NCL should start with enzyme analysis in the case of INCL and LINCL and investigation of lymphocyte vacuolisation for JNCL. Diagnosis at the protein level is not available for JNCL, but CLN3 mutation analysis is possible. The carrier status of healthy relatives in families with known mutations in either CLN1, CLN2, CLN3 or CLN6 can be determined with certainty by mutation analysis.
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Affiliation(s)
- P E M Taschner
- Leids Universitair Medisch Centrum, Centrum voor Humane en Klinische Genetica, Postbus 9503, 2300 RA Leiden.
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Nanao MH, Tcherniuk SO, Chroboczek J, Dideberg O, Dessen A, Balakirev MY. Crystal structure of human otubain 2. EMBO Rep 2004; 5:783-8. [PMID: 15258613 PMCID: PMC1299112 DOI: 10.1038/sj.embor.7400201] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2004] [Revised: 06/16/2004] [Accepted: 06/16/2004] [Indexed: 01/07/2023] Open
Abstract
Ubiquitylation, the modification of cellular proteins by the covalent attachment of ubiquitin, is critical for diverse biological processes including cell cycle progression, signal transduction and stress response. This process can be reversed and regulated by a group of proteases called deubiquitylating enzymes (DUBs). Otubains are a recently identified family of DUBs that belong to the ovarian tumour (OTU) superfamily of proteins. Here, we report the first crystal structure of an OTU superfamily protein, otubain 2, at 2.1 A resolution and propose a model for otubain-ubiquitin binding on the basis of other DUB structures. Although otubain 2 is a member of the cysteine protease superfamily of folds, its crystal structure shows a novel fold for DUBs. Moreover, the active-site cleft is sterically occluded by a novel loop conformation resulting in an oxyanion hole, which consists uniquely of backbone amides, rather than the composite backbone/side-chain substructures seen in other DUBs and cysteine proteases. Furthermore, the residues that orient and stabilize the active-site histidine of otubain 2 are different from other cysteine proteases. This reorganization of the active-site topology provides a possible explanation for the low turnover and substrate specificity of the otubains.
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Affiliation(s)
- Max H Nanao
- Laboratoire de Cristallographie Macromoléculaire, Institut de Biologie Structurale JP Ebel (CEA/CNRS/UJF), 41 rue Jules Horowitz, 38027 Grenoble, France
| | - Sergey O Tcherniuk
- Laboratoire de Biophysique Moléculaire, Institut de Biologie Structurale JP Ebel (CEA/CNRS/UJF), 41 rue Jules Horowitz, 38027 Grenoble, France
| | - Jadwiga Chroboczek
- Laboratoire de Biophysique Moléculaire, Institut de Biologie Structurale JP Ebel (CEA/CNRS/UJF), 41 rue Jules Horowitz, 38027 Grenoble, France
| | - Otto Dideberg
- Laboratoire de Cristallographie Macromoléculaire, Institut de Biologie Structurale JP Ebel (CEA/CNRS/UJF), 41 rue Jules Horowitz, 38027 Grenoble, France
| | - Andréa Dessen
- Laboratoire de Cristallographie Macromoléculaire, Institut de Biologie Structurale JP Ebel (CEA/CNRS/UJF), 41 rue Jules Horowitz, 38027 Grenoble, France
| | - Maxim Y Balakirev
- Laboratoire de Biophysique Moléculaire, Institut de Biologie Structurale JP Ebel (CEA/CNRS/UJF), 41 rue Jules Horowitz, 38027 Grenoble, France
- Laboratoire Biopuces, Département de Réponse et Dynamique Cellulaires, Commisariat a l'Energie Atomique, 17 rue des Martyrs, 38054 Grenoble, France
- Tel: +33 438782103; Fax: +33 438785917; E-mail:
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Sitter B, Autti T, Tyynelä J, Sonnewald U, Bathen TF, Puranen J, Santavuori P, Haltia MJ, Paetau A, Polvikoski T, Gribbestad IS, Häkkinen AM. High-resolution magic angle spinning and1H magnetic resonance spectroscopy reveal significantly altered neuronal metabolite profiles in CLN1 but not in CLN3. J Neurosci Res 2004; 77:762-9. [PMID: 15352223 DOI: 10.1002/jnr.20123] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The neuronal ceroid lipofuscinoses (NCLs) are among the most severe inherited progressive neurodegenerative disorders of children. The purpose of this study was to compare the in vivo 1.5-T 1H magnetic resonance (MR) and ex vivo 14.3-T high-resolution (HR) magic angle spinning (MAS) 1H MR brain spectra of patients with infantile (CLN1) and juvenile (CLN3) types of NCL, to obtain detailed information about the alterations in the neuronal metabolite profiles in these diseases and to test the suitability of the ex vivo HR MAS (1)H MRS technique in analysis of autopsy brain tissue. Ex vivo spectra from CLN1 autopsy brain tissue (n = 9) significantly differed from those of the control (n = 9) and CLN3 (n = 5) groups, although no differences were found between the CLN3 and the control groups. Principal component analysis of ex vivo data showed that decreased levels of N-acetylaspartate (NAA), gamma-aminobutyric acid (GABA), glutamine, and glutamate as well as increased levels of inositols characterized the CLN1 spectra. Also, the intensity ratio of lipid methylene/methyl protons was decreased in spectra of CLN1 brain tissue compared with CLN3 and control brain tissue. In concordance with the ex vivo data, the in vivo spectra of late-stage patients with CLN1 (n = 3) revealed a dramatic decrease of NAA and a proportional increase of myo-inositol and lipids compared with control subjects. Again, the spectra of patients with CLN3 (n = 13) did not differ from those of controls (n = 15). In conclusion, the ex vivo and in vivo spectroscopic findings were in good agreement within all analyzed groups and revealed significant alterations in metabolite profiles in CLN1 brain tissue but not in CLN3 compared with controls. Furthermore, HR MAS 1H MR spectra facilitated refined detection of neuronal metabolites, including GABA, and composition of lipids in the autopsy brain tissue of NCL patients.
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Knobbe CB, Reifenberger J, Blaschke B, Reifenberger G. Hypermethylation and transcriptional downregulation of the carboxyl-terminal modulator protein gene in glioblastomas. J Natl Cancer Inst 2004; 96:483-6. [PMID: 15026474 DOI: 10.1093/jnci/djh064] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The carboxyl-terminal modulator protein (CTMP) has been identified as a negative regulator of protein kinase B/Akt. Aberrant Akt signaling is frequently observed in glioblastomas, the most common and most malignant glial brain tumors. Because loss of CTMP function and/or expression may remove the inhibitory effects on Akt and promote tumorigenesis, we studied 93 primary glioblastomas and nine glioblastoma cell lines for CTMP deletion, mutation, promoter hypermethylation, and mRNA expression. None of the tumors or cell lines had CTMP-homozygous deletions or coding sequence mutations. However, CTMP mRNA expression was lower by at least 50% relative to non-neoplastic brain tissue in 37 (40%) glioblastomas and six (67%) glioma cell lines. Reduced CTMP mRNA levels were closely associated with hypermethylation of the CTMP promoter. Furthermore, treatment of CTMP-hypermethylated A172 glioma cells with the demethylating agent 5-aza-2'-deoxycytidine and the histone deacetylase inhibitor trichostatin A resulted in partial demethylation of the CTMP promoter and increased CTMP mRNA expression. Thus, epigenetic downregulation of CTMP transcription is a common aberration in glioblastomas.
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Affiliation(s)
- Christiane B Knobbe
- Department of Neuropathology, Heinrich-Heine-University, Düsseldorf, Germany
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49
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Abstract
The neuronal ceroid lipofuscinoses (NCL), also known as Batten disease, are a group of inherited severe neurodegenerative disorders primarily affecting children. They are characterised by the accumulation of autofluorescent storage material in many cells. Children suffer from visual failure, seizures, progressive physical and mental decline and premature death, associated with the loss of cortical neurones. Six genes have been identified that cause human NCL (CLN1, CLN2, CLN3, CLN5, CLN6, CLN8), and approximately 150 mutations have been described. The majority of mutations result in a characteristic disease course for each gene. However, mutations associated with later disease onset or a more protracted disease course have also been described. At least seven common mutations exist, either with a world-wide distribution or associated with families from specific countries. All mutations are described in the NCL Mutation Database (http://www.uc.ac.uk/ncl).
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Affiliation(s)
- Sara E Mole
- Department of Paediatrics and Child Health, Royal Free and University College Medical School, University College, London, United Kingdom.
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Woltjer RL, Maezawa I, Ou JJ, Montine KS, Montine TJ. Advanced glycation endproduct precursor alters intracellular amyloid-beta/A beta PP carboxy-terminal fragment aggregation and cytotoxicity. J Alzheimers Dis 2003; 5:467-76. [PMID: 14757937 DOI: 10.3233/jad-2003-5607] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.4] [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: 11/15/2022]
Abstract
Carbonyl stress from products of lipid peroxidation, such as 4-hydroxynonenal (HNE), and products of sugars in diabetes mellitus, such as methylglyoxal (MG) and glyoxal (G), may contribute to neurodegeneration in Alzheimer's disease (AD). We tested the hypothesis that these carbonyls alter the proposed central pathogenic mechanism of AD, intracellular amyloid-beta (A beta)-mediated cytotoxicity, using a human neuroblastoma cell line that conditionally expresses carboxy-terminal fragments (CTFs) of the amyloid precursor protein. HNE was a potent cytotoxin, whereas G was mildly cytotoxic; cytotoxicity from each was independent of A beta/CTF expression and not altered by alpha-tocopherol. In contrast, MG cytotoxicity was enhanced by the induced expression of A beta/CTFs and suppressed by alpha-tocopherol. alpha-tocopherol cytoprotection was accompanied by decreased A beta/CTF aggregation. G also promoted beta/CTF aggregation but by mechanisms unaffected by alpha-tocopherol treatment. Our findings showed that A beta/CTF aggregation and cytotoxicity may be profoundly altered by aldehydes associated with diabetes and that in the case of MG, this process is suppressed by alpha-tocopherol. Moreover, our results suggest that while intracellular aggregation of A beta/CTFs may be necessary for the development of toxicity attributable to their expression in this model, the presence of high-molecular weight aggregated A beta/CTFs does not invariably lead to cytotoxicity.
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Affiliation(s)
- Randall L Woltjer
- Department of Pathology, University of Washington, Seattle, Washington 98104, USA.
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