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Kita A, Ishida Y, Shimosaka T, Michimori Y, Makarova K, Koonin E, Atomi H, Miki K. Crystal structure of GTP-dependent dephospho-coenzyme A kinase from the hyperthermophilic archaeon, Thermococcus kodakarensis. Proteins 2024; 92:768-775. [PMID: 38235908 DOI: 10.1002/prot.26666] [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: 10/04/2023] [Revised: 12/17/2023] [Accepted: 01/01/2024] [Indexed: 01/19/2024]
Abstract
The biosynthesis pathways of coenzyme A (CoA) in most archaea involve several unique enzymes including dephospho-CoA kinase (DPCK) that converts dephospho-CoA to CoA in the final step of CoA biosynthesis in all domains of life. The archaeal DPCK is unrelated to the analogous bacterial and eukaryotic enzymes and shows no significant sequence similarity to any proteins with known structures. Unusually, the archaeal DPCK utilizes GTP as the phosphate donor although the analogous bacterial and eukaryotic enzymes are ATP-dependent kinases. Here, we report the crystal structure of DPCK and its complex with GTP and a magnesium ion from the archaeal hyperthermophile Thermococcus kodakarensis. The crystal structure demonstrates why GTP is the preferred substrate of this kinase. We also report the activity analyses of site-directed mutants of crucial residues determined based on sequence conservation and the crystal structure. From these results, the key residues involved in the reaction of phosphoryl transfer and the possible dephospho-CoA binding site are inferred.
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Affiliation(s)
- Akiko Kita
- Institute for Integrated Radiation and Nuclear Science, Kyoto University, Osaka, Japan
| | - Yuna Ishida
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, Japan
| | - Takahiro Shimosaka
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, Japan
| | - Yuta Michimori
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, Japan
| | - Kira Makarova
- National Center for Biotechnology Information, National Library of Medicine, NIH, Bethesda, Maryland, USA
| | - Eugene Koonin
- National Center for Biotechnology Information, National Library of Medicine, NIH, Bethesda, Maryland, USA
| | - Haruyuki Atomi
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, Japan
| | - Kunio Miki
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto, Japan
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2
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Aliaga Fandino AC, Jelínková A, Marhava P, Petrášek J, Hardtke CS. Ectopic assembly of an auxin efflux control machinery shifts developmental trajectories. Plant Cell 2024; 36:1791-1805. [PMID: 38267818 DOI: 10.1093/plcell/koae023] [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] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Revised: 12/05/2023] [Accepted: 01/18/2024] [Indexed: 01/26/2024]
Abstract
Polar auxin transport in the Arabidopsis (Arabidopsis thaliana) root tip maintains high auxin levels around the stem cell niche that gradually decrease in dividing cells but increase again once they transition toward differentiation. Protophloem differentiates earlier than other proximal tissues and employs a unique auxin "canalization" machinery that is thought to balance auxin efflux with retention. It consists of a proposed activator of PIN-FORMED (PIN) auxin efflux carriers, the cAMP-, cGMP- and Calcium-dependent (AGC) kinase PROTEIN KINASE ASSOCIATED WITH BRX (PAX); its inhibitor, BREVIS RADIX (BRX); and PHOSPHATIDYLINOSITOL-4-PHOSPHATE-5-KINASE (PIP5K) enzymes, which promote polar PAX and BRX localization. Because of a dynamic PAX-BRX-PIP5K interplay, the net cellular output of this machinery remains unclear. In this study, we deciphered the dosage-sensitive regulatory interactions among PAX, BRX, and PIP5K by their ectopic expression in developing xylem vessels. The data suggest that the dominant collective output of the PAX-BRX-PIP5K module is a localized reduction in PIN abundance. This requires PAX-stimulated clathrin-mediated PIN endocytosis upon site-specific phosphorylation, which distinguishes PAX from other AGC kinases. An ectopic assembly of the PAX-BRX-PIP5K module is sufficient to cause cellular auxin retention and affects root growth vigor by accelerating the trajectory of xylem vessel development. Our data thus provide direct evidence that local manipulation of auxin efflux alters the timing of cellular differentiation in the root.
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Affiliation(s)
| | - Adriana Jelínková
- Institute of Experimental Botany, Czech Academy of Sciences, Prague 165 02, Czech Republic
| | - Petra Marhava
- Department of Plant Molecular Biology, University of Lausanne, Lausanne CH-1015, Switzerland
| | - Jan Petrášek
- Institute of Experimental Botany, Czech Academy of Sciences, Prague 165 02, Czech Republic
| | - Christian S Hardtke
- Department of Plant Molecular Biology, University of Lausanne, Lausanne CH-1015, Switzerland
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Ghosh C, Kakar R, Hoyle RG, Liu Z, Guo C, Li J, Wang XY, Sun Y. Type I gamma phosphatidylinositol phosphate 5-kinase i5 controls cell sensitivity to interferon. Dev Cell 2024; 59:1028-1042.e5. [PMID: 38452758 DOI: 10.1016/j.devcel.2024.02.005] [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: 07/08/2023] [Revised: 12/21/2023] [Accepted: 02/09/2024] [Indexed: 03/09/2024]
Abstract
The interferon signaling pathway is critical for host defense by serving diverse functions in both innate and adaptive immune responses. Here, we show that type I gamma phosphatidylinositol phosphate 5-kinase i5 (PIPKIγi5), an enzyme that synthesizes phosphatidylinositol-4,5-bisphosphate (PI4,5P2), controls the sensitivity to interferon in both human and mouse cells. PIPKIγi5 directly binds to the interferon-gamma (IFN-γ) downstream effector signal transducer and activator of transcription 1 (STAT1), which suppresses the STAT1 dimerization, IFN-γ-induced STAT1 nuclear translocation, and transcription of IFN-γ-responsive genes. Depletion of PIPKIγi5 significantly enhances IFN-γ signaling and strengthens an antiviral response. In addition, PIPKIγi5-synthesized PI4,5P2 can bind to STAT1 and promote the PIPKIγi5-STAT1 interaction. Similar to its interaction with STAT1, PIPKIγi5 is capable of interacting with other members of the STAT family, including STAT2 and STAT3, thereby suppressing the expression of genes mediated by these transcription factors. These findings identify the function of PIPKIγi5 in immune regulation.
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Affiliation(s)
- Chinmoy Ghosh
- Department of Oral and Craniofacial Molecular Biology, Philips Institute for Oral Health Research, School of Dentistry, Virginia Commonwealth University, Richmond, VA 23298, USA
| | - Ruchi Kakar
- Department of Oral and Craniofacial Molecular Biology, Philips Institute for Oral Health Research, School of Dentistry, Virginia Commonwealth University, Richmond, VA 23298, USA
| | - Rosalie G Hoyle
- Department of Medicinal Chemistry, Institute for Structural Biology, Drug Discovery and Development, School of Pharmacy, Virginia Commonwealth University, Richmond, VA 23298, USA
| | - Zheng Liu
- Department of Human and Molecular Genetics, School of Medicine, Virginia Commonwealth University, Richmond, VA 23298, USA
| | - Chunqing Guo
- Department of Human and Molecular Genetics, School of Medicine, Virginia Commonwealth University, Richmond, VA 23298, USA
| | - Jiong Li
- Department of Medicinal Chemistry, Institute for Structural Biology, Drug Discovery and Development, School of Pharmacy, Virginia Commonwealth University, Richmond, VA 23298, USA; Massey Cancer Center, Virginia Commonwealth University, Richmond, VA 23298, USA
| | - Xiang-Yang Wang
- Department of Human and Molecular Genetics, School of Medicine, Virginia Commonwealth University, Richmond, VA 23298, USA; Massey Cancer Center, Virginia Commonwealth University, Richmond, VA 23298, USA
| | - Yue Sun
- Department of Oral and Craniofacial Molecular Biology, Philips Institute for Oral Health Research, School of Dentistry, Virginia Commonwealth University, Richmond, VA 23298, USA; Massey Cancer Center, Virginia Commonwealth University, Richmond, VA 23298, USA.
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Xiong T, Zhang Z, Fan T, Ye F, Ye Z. Origin, evolution, and diversification of inositol 1,4,5-trisphosphate 3-kinases in plants and animals. BMC Genomics 2024; 25:350. [PMID: 38589807 PMCID: PMC11000326 DOI: 10.1186/s12864-024-10257-7] [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: 01/25/2024] [Accepted: 03/26/2024] [Indexed: 04/10/2024] Open
Abstract
BACKGROUND In Eukaryotes, inositol polyphosphates (InsPs) represent a large family of secondary messengers and play crucial roes in various cellular processes. InsPs are synthesized through a series of pohophorylation reactions catalyzed by various InsP kinases in a sequential manner. Inositol 1,4,5-trisphosphate 3-kinase (IP3 3-kinase/IP3K), one member of InsP kinase, plays important regulation roles in InsPs metabolism by specifically phosphorylating inositol 1,4,5-trisphosphate (IP3) to inositol 1,3,4,5-tetrakisphosphate (IP4) in animal cells. IP3Ks were widespread in fungi, plants and animals. However, its evolutionary history and patterns have not been examined systematically. RESULTS A total of 104 and 31 IP3K orthologues were identified across 57 plant genomes and 13 animal genomes, respectively. Phylogenetic analyses indicate that IP3K originated in the common ancestor before the divergence of fungi, plants and animals. In most plants and animals, IP3K maintained low-copy numbers suggesting functional conservation during plant and animal evolution. In Brassicaceae and vertebrate, IP3K underwent one and two duplication events, respectively, resulting in multiple gene copies. Whole-genome duplication (WGD) was the main mechanism for IP3K duplications, and the IP3K duplicates have experienced functional divergence. Finally, a hypothetical evolutionary model for the IP3K proteins is proposed based on phylogenetic theory. CONCLUSION Our study reveals the evolutionary history of IP3K proteins and guides the future functions of animal, plant, and fungal IP3K proteins.
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Affiliation(s)
- Tao Xiong
- School of Life and Health Science, Huzhou College, Huzhou, Zhejiang, China
- College of Life Science, Xinyang Normal University, Xinyang, Henan, China
| | - Zaibao Zhang
- School of Life and Health Science, Huzhou College, Huzhou, Zhejiang, China.
- College of Life Science, Xinyang Normal University, Xinyang, Henan, China.
| | - Tianyu Fan
- School of Life and Health Science, Huzhou College, Huzhou, Zhejiang, China
| | - Fan Ye
- College of Forestry and Biotechnology, Zhejiang A & F University, Hangzhou, Zhejiang, China
| | - Ziyi Ye
- School of Life and Health Science, Huzhou College, Huzhou, Zhejiang, China
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Dong W, Li Q, Lu X, Lan J, Qiu Z, Wang X, Wang J, Zheng X, Chen S, Zhang C, Jin J. Ceramide kinase-mediated C1P metabolism attenuates acute liver injury by inhibiting the interaction between KEAP1 and NRF2. Exp Mol Med 2024; 56:946-958. [PMID: 38556546 DOI: 10.1038/s12276-024-01203-4] [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: 10/05/2023] [Revised: 01/17/2024] [Accepted: 01/22/2024] [Indexed: 04/02/2024] Open
Abstract
Acute liver injury is the basis of the pathogenesis of diverse liver diseases. However, the mechanism underlying liver injury is complex and not completely understood. In our study, we revealed that CERK, which phosphorylates ceramide to produce ceramide-1-phosphate (C1P), was the sphingolipid pathway-related protein that had the most significantly upregulated expression during acute liver injury. A functional study confirmed that CERK and C1P attenuate hepatic injury both in vitro and in vivo through antioxidant effects. Mechanistic studies have shown that CERK and C1P positively regulate the protein expression of NRF2, which is a crucial protein that helps maintain redox homeostasis. Furthermore, our results indicated that C1P disrupted the interaction between NRF2 and KEAP1 by competitively binding to KEAP1, which allowed for the nuclear translocation of NRF2. In addition, pull-down assays and molecular docking analyses revealed that C1P binds to the DGR domain of KEAP1, which allows it to maintain its interaction with NRF2. Importantly, these findings were verified in human primary hepatocytes and a mouse model of hepatic ischemia‒reperfusion injury. Taken together, our findings demonstrated that CERK-mediated C1P metabolism attenuates acute liver injury via the binding of C1P to the DGR domain of KEAP1 and subsequently the release and nuclear translocation of NRF2, which activates the transcription of cytoprotective and antioxidant genes. Our study suggested that the upregulation of CERK and C1P expression may serve as a potential antioxidant strategy to alleviate acute liver injury.
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Affiliation(s)
- Wei Dong
- Guangxi Key Laboratory of Molecular Medicine in Liver Injury and Repair, the Affiliated Hospital of Guilin Medical University, Guilin, Guangxi, China
- Department of Hepatobiliary and Pancreatic Surgery, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
- Xiangya Hospital, Central South University, Changsha, Hunan, China
- Guangxi Health Commission Key Laboratory of Basic Research in Sphingolipid Metabolism Related Diseases, the Affiliated Hospital of Guilin Medical University, Guilin, Guangxi, China
| | - Qing Li
- Guangxi Key Laboratory of Molecular Medicine in Liver Injury and Repair, the Affiliated Hospital of Guilin Medical University, Guilin, Guangxi, China
- Guangxi Health Commission Key Laboratory of Basic Research in Sphingolipid Metabolism Related Diseases, the Affiliated Hospital of Guilin Medical University, Guilin, Guangxi, China
- China-USA Lipids in Health and Disease Research Center, Guilin Medical University, Guilin, Guangxi, China
| | - Xing Lu
- Guangxi Key Laboratory of Molecular Medicine in Liver Injury and Repair, the Affiliated Hospital of Guilin Medical University, Guilin, Guangxi, China
- Guangxi Health Commission Key Laboratory of Basic Research in Sphingolipid Metabolism Related Diseases, the Affiliated Hospital of Guilin Medical University, Guilin, Guangxi, China
- China-USA Lipids in Health and Disease Research Center, Guilin Medical University, Guilin, Guangxi, China
| | - Jianfeng Lan
- Guangxi Key Laboratory of Molecular Medicine in Liver Injury and Repair, the Affiliated Hospital of Guilin Medical University, Guilin, Guangxi, China
- Guangxi Health Commission Key Laboratory of Basic Research in Sphingolipid Metabolism Related Diseases, the Affiliated Hospital of Guilin Medical University, Guilin, Guangxi, China
- China-USA Lipids in Health and Disease Research Center, Guilin Medical University, Guilin, Guangxi, China
| | - Zhidong Qiu
- Guangxi Key Laboratory of Molecular Medicine in Liver Injury and Repair, the Affiliated Hospital of Guilin Medical University, Guilin, Guangxi, China
- Xiangya Hospital, Central South University, Changsha, Hunan, China
- Guangxi Health Commission Key Laboratory of Basic Research in Sphingolipid Metabolism Related Diseases, the Affiliated Hospital of Guilin Medical University, Guilin, Guangxi, China
- China-USA Lipids in Health and Disease Research Center, Guilin Medical University, Guilin, Guangxi, China
| | - Xuehong Wang
- Guangxi Key Laboratory of Molecular Medicine in Liver Injury and Repair, the Affiliated Hospital of Guilin Medical University, Guilin, Guangxi, China
- Xiangya Hospital, Central South University, Changsha, Hunan, China
- Guangxi Health Commission Key Laboratory of Basic Research in Sphingolipid Metabolism Related Diseases, the Affiliated Hospital of Guilin Medical University, Guilin, Guangxi, China
- China-USA Lipids in Health and Disease Research Center, Guilin Medical University, Guilin, Guangxi, China
| | - Junnan Wang
- Guangxi Key Laboratory of Molecular Medicine in Liver Injury and Repair, the Affiliated Hospital of Guilin Medical University, Guilin, Guangxi, China
- Guangxi Health Commission Key Laboratory of Basic Research in Sphingolipid Metabolism Related Diseases, the Affiliated Hospital of Guilin Medical University, Guilin, Guangxi, China
- China-USA Lipids in Health and Disease Research Center, Guilin Medical University, Guilin, Guangxi, China
| | - Xiaojiao Zheng
- Center for Translational Medicine and Shanghai Key Laboratory of Diabetes Mellitus, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Sifan Chen
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Guangdong-Hong Kong Joint Laboratory for RNA Medicine, Medical Research Center, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, Guangdong, China
- Nanhai Translational Innovation Center of Precision Immunology, Sun Yat-Sen Memorial Hospital, Foshan, Guangdong, China
| | - Chong Zhang
- Guangxi Key Laboratory of Molecular Medicine in Liver Injury and Repair, the Affiliated Hospital of Guilin Medical University, Guilin, Guangxi, China.
- Guangxi Health Commission Key Laboratory of Basic Research in Sphingolipid Metabolism Related Diseases, the Affiliated Hospital of Guilin Medical University, Guilin, Guangxi, China.
- China-USA Lipids in Health and Disease Research Center, Guilin Medical University, Guilin, Guangxi, China.
| | - Junfei Jin
- Guangxi Key Laboratory of Molecular Medicine in Liver Injury and Repair, the Affiliated Hospital of Guilin Medical University, Guilin, Guangxi, China.
- Xiangya Hospital, Central South University, Changsha, Hunan, China.
- Guangxi Health Commission Key Laboratory of Basic Research in Sphingolipid Metabolism Related Diseases, the Affiliated Hospital of Guilin Medical University, Guilin, Guangxi, China.
- China-USA Lipids in Health and Disease Research Center, Guilin Medical University, Guilin, Guangxi, China.
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Nataf S, Guillen M, Pays L. The Immunometabolic Gene N-Acetylglucosamine Kinase Is Uniquely Involved in the Heritability of Multiple Sclerosis Severity. Int J Mol Sci 2024; 25:3803. [PMID: 38612613 PMCID: PMC11011344 DOI: 10.3390/ijms25073803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2024] [Revised: 03/22/2024] [Accepted: 03/26/2024] [Indexed: 04/14/2024] Open
Abstract
The clinical severity of multiple sclerosis (MS), an autoimmune disorder of the central nervous system, is thought to be determined by environmental and genetic factors that have not yet been identified. In a recent genome-wide association study (GWAS), a single nucleotide polymorphism (SNP), rs10191329, has been associated with MS severity in two large independent cohorts of patients. Different approaches were followed by the authors to prioritize the genes that are transcriptionally regulated by such an SNP. It was concluded that the identified SNP regulates a group of proximal genes involved in brain resilience and cognitive abilities rather than immunity. Here, by conducting an alternative strategy for gene prioritization, we reached the opposite conclusion. According to our re-analysis, the main target of rs10191329 is N-Acetylglucosamine Kinase (NAGK), a metabolic gene recently shown to exert major immune functions via the regulation of the nucleotide-binding oligomerization domain-containing protein 2 (NOD2) pathway. To gain more insights into the immunometabolic functions of NAGK, we analyzed the currently known list of NAGK protein partners. We observed that NAGK integrates a dense network of human proteins that are involved in glucose metabolism and are highly expressed by classical monocytes. Our findings hold potentially major implications for the understanding of MS pathophysiology.
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Affiliation(s)
- Serge Nataf
- Bank of Tissues and Cells, Hospices Civils de Lyon, Hôpital Edouard Herriot, Place d’Arsonval, F-69003 Lyon, France
- Stem-Cell and Brain Research Institute, 18 Avenue du Doyen Lépine, F-69500 Bron, France
- Lyon-Est School of Medicine, University Claude Bernard Lyon 1, 43 Bd du 11 Novembre 1918, F-69100 Villeurbanne, France
| | - Marine Guillen
- Bank of Tissues and Cells, Hospices Civils de Lyon, Hôpital Edouard Herriot, Place d’Arsonval, F-69003 Lyon, France
- Stem-Cell and Brain Research Institute, 18 Avenue du Doyen Lépine, F-69500 Bron, France
| | - Laurent Pays
- Bank of Tissues and Cells, Hospices Civils de Lyon, Hôpital Edouard Herriot, Place d’Arsonval, F-69003 Lyon, France
- Stem-Cell and Brain Research Institute, 18 Avenue du Doyen Lépine, F-69500 Bron, France
- Lyon-Est School of Medicine, University Claude Bernard Lyon 1, 43 Bd du 11 Novembre 1918, F-69100 Villeurbanne, France
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7
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Giacomini G, Piquet S, Chevallier O, Dabin J, Bai SK, Kim B, Siddaway R, Raught B, Coyaud E, Shan CM, Reid RJD, Toda T, Rothstein R, Barra V, Wilhelm T, Hamadat S, Bertin C, Crane A, Dubois F, Forne I, Imhof A, Bandopadhayay P, Beroukhim R, Naim V, Jia S, Hawkins C, Rondinelli B, Polo SE. Aberrant DNA repair reveals a vulnerability in histone H3.3-mutant brain tumors. Nucleic Acids Res 2024; 52:2372-2388. [PMID: 38214234 PMCID: PMC10954481 DOI: 10.1093/nar/gkad1257] [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: 05/26/2023] [Revised: 12/14/2023] [Accepted: 01/02/2024] [Indexed: 01/13/2024] Open
Abstract
Pediatric high-grade gliomas (pHGG) are devastating and incurable brain tumors with recurrent mutations in histone H3.3. These mutations promote oncogenesis by dysregulating gene expression through alterations of histone modifications. We identify aberrant DNA repair as an independent mechanism, which fosters genome instability in H3.3 mutant pHGG, and opens new therapeutic options. The two most frequent H3.3 mutations in pHGG, K27M and G34R, drive aberrant repair of replication-associated damage by non-homologous end joining (NHEJ). Aberrant NHEJ is mediated by the DNA repair enzyme polynucleotide kinase 3'-phosphatase (PNKP), which shows increased association with mutant H3.3 at damaged replication forks. PNKP sustains the proliferation of cells bearing H3.3 mutations, thus conferring a molecular vulnerability, specific to mutant cells, with potential for therapeutic targeting.
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Affiliation(s)
- Giulia Giacomini
- Epigenetics & Cell Fate Centre, CNRS/Université Paris Cité, Paris, France
| | - Sandra Piquet
- Epigenetics & Cell Fate Centre, CNRS/Université Paris Cité, Paris, France
| | - Odile Chevallier
- Epigenetics & Cell Fate Centre, CNRS/Université Paris Cité, Paris, France
| | - Juliette Dabin
- Epigenetics & Cell Fate Centre, CNRS/Université Paris Cité, Paris, France
| | - Siau-Kun Bai
- Epigenetics & Cell Fate Centre, CNRS/Université Paris Cité, Paris, France
| | - Byungjin Kim
- Arthur and Sonia Labatt Brain Tumour Research Centre, The Hospital for Sick Children, Toronto, Canada
| | - Robert Siddaway
- Arthur and Sonia Labatt Brain Tumour Research Centre, The Hospital for Sick Children, Toronto, Canada
| | - Brian Raught
- Princess Margaret Cancer Centre, University Health Network, 101 College Street, Toronto, ON M5G1L7, Canada
- Department of Medical Biophysics, University of Toronto, Toronto, Canada
| | - Etienne Coyaud
- Princess Margaret Cancer Centre, University Health Network, 101 College Street, Toronto, ON M5G1L7, Canada
- Department of Medical Biophysics, University of Toronto, Toronto, Canada
- Université de Lille, Inserm, CHU Lille, U1192 - Protéomique Réponse Inflammatoire Spectrométrie de Masse - PRISM, F-59000 Lille, France
| | - Chun-Min Shan
- Department of Biological Sciences, Columbia University, New York, NY 10027, USA
| | - Robert J D Reid
- Department of Genetics & Development, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Takenori Toda
- Department of Biological Sciences, Columbia University, New York, NY 10027, USA
| | - Rodney Rothstein
- Department of Genetics & Development, Columbia University Irving Medical Center, New York, NY 10032, USA
- Department of Systems Biology, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Viviana Barra
- CNRS UMR9019 Genome Integrity and Cancers, Université Paris-Saclay, Gustave Roussy Institute, Villejuif, France
| | - Therese Wilhelm
- CNRS UMR9019 Genome Integrity and Cancers, Université Paris-Saclay, Gustave Roussy Institute, Villejuif, France
| | - Sabah Hamadat
- CNRS UMR9019 Genome Integrity and Cancers, Université Paris-Saclay, Gustave Roussy Institute, Villejuif, France
| | - Chloé Bertin
- CNRS UMR9019 Genome Integrity and Cancers, Université Paris-Saclay, Gustave Roussy Institute, Villejuif, France
| | - Alexander Crane
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, USA
| | - Frank Dubois
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, USA
| | - Ignasi Forne
- Protein Analysis Unit, BioMedical Center, Faculty of Medicine, Ludwig-Maximilians-University, Martinsried, Germany
| | - Axel Imhof
- Protein Analysis Unit, BioMedical Center, Faculty of Medicine, Ludwig-Maximilians-University, Martinsried, Germany
| | - Pratiti Bandopadhayay
- Department of Pediatric Oncology, Dana-Farber Boston Children's Cancer and Blood Disorders Center, Boston, USA
| | - Rameen Beroukhim
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, USA
| | - Valeria Naim
- CNRS UMR9019 Genome Integrity and Cancers, Université Paris-Saclay, Gustave Roussy Institute, Villejuif, France
| | - Songtao Jia
- Department of Biological Sciences, Columbia University, New York, NY 10027, USA
| | - Cynthia Hawkins
- Arthur and Sonia Labatt Brain Tumour Research Centre, The Hospital for Sick Children, Toronto, Canada
| | | | - Sophie E Polo
- Epigenetics & Cell Fate Centre, CNRS/Université Paris Cité, Paris, France
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Jairaman A, Badiger VA, Raj S, Nair KV, Balan S, Narayanan DL. A novel homozygous variant in PMVK is associated with enhanced IL1β secretion and a hyper-IgD syndrome-like phenotype. Clin Genet 2024; 105:302-307. [PMID: 38018277 DOI: 10.1111/cge.14451] [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: 08/29/2023] [Revised: 10/26/2023] [Accepted: 10/30/2023] [Indexed: 11/30/2023]
Abstract
The evolutionarily conserved mevalonate pathway plays an important role in the synthesis of cholesterol and isoprenoid compounds. Mevalonate kinase (MVK) and phosphomevalonate kinase (PMVK) enzymes regulate key rate-limiting steps in this pathway by sequentially phosphorylating mevalonic acid to yield downstream metabolites that regulate protein prenylation and cell signaling. Biallelic pathogenic variants in MVK cause a spectrum of rare autoinflammatory disorders that encompass milder forms of hyper-IgD syndrome (HIDS) at one end and the more severe mevalonic aciduria on the other. In contrast, pathogenic variants reported in PMVK are heterozygous and associated with porokeratosis, a skin disorder with no systemic manifestations. Recently, biallelic variants in PMVK were reported as a cause for an autoinflammatory disorder for the first time in two unrelated patients. In this study, we describe a child with recurrent arthritis and a HIDS-like phenotype harboring a novel homozygous variant c.398 C>T (p.Ala133Val) in PMVK. Mononuclear cells isolated from the patient showed significantly elevated production of interleukin 1β, a key cytokine that shapes the inflammatory response in HIDS. Protein modeling studies suggested potential defects in PMVK enzyme activity. These results posit a further expanding of the genotypic spectrum of autoinflammatory disease to include biallelic PMVK variants.
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Affiliation(s)
- Amit Jairaman
- Department of Medical Genetics, Kasturba Medical College, Manipal Academy of Higher Education, Manipal, India
| | - Vaishnavi Ashok Badiger
- Department of Medical Genetics, Kasturba Medical College, Manipal Academy of Higher Education, Manipal, India
| | - Spoorthy Raj
- Department of Rheumatology and Clinical Immunology, Amrita Institute of Medical Sciences, Kochi, India
| | - Karthik Vijay Nair
- Department of Medical Genetics, Kasturba Medical College, Manipal Academy of Higher Education, Manipal, India
| | - Suma Balan
- Department of Rheumatology and Clinical Immunology, Amrita Institute of Medical Sciences, Kochi, India
| | - Dhanya Lakshmi Narayanan
- Department of Medical Genetics, Kasturba Medical College, Manipal Academy of Higher Education, Manipal, India
- DBT-Wellcome Trust India Alliance Early Career Clinical and Public Health Research Fellow, Hyderabad, India
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Chang CH, See Too WC, Lim BH, Few LL. Identification and Characterization of Entamoeba histolytica Choline Kinase. Acta Parasitol 2024; 69:426-438. [PMID: 38172465 DOI: 10.1007/s11686-023-00763-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Accepted: 11/22/2023] [Indexed: 01/05/2024]
Abstract
PURPOSE Entamoeba histolytica is one of the death-causing parasites in the world. Study on its lipid composition revealed that it is predominated by phosphatidylcholine and phosphatidylethanolamine. Further study revealed that its phosphorylated metabolites might be produced by the Kennedy pathway. Here, we would like to report on the characterizations of enzymes from this pathway that would provide information for the design of novel inhibitors against these enzymes in future. METHODOLOGY E. histolytica HM-1:IMSS genomic DNA was isolated and two putative choline/ethanolamine kinase genes (EhCK1 and EhCK2) were cloned and expressed from Escherichia coli BL21 strain. Enzymatic characterizations were further carried out on the purified enzymes. RESULTS EhCK1 and EhCK2 were identified from E. histolytica genome. The deduced amino acid sequences were more identical to its homologues in human (35-48%) than other organisms. The proteins were clustered as ethanolamine kinase in the constructed phylogeny tree. Sequence analysis showed that they possessed all the conserved motifs in choline kinase family: ATP-binding loop, Brenner's phosphotransferase motif, and choline kinase motif. Here, the open reading frames were cloned, expressed, and purified to apparent homogeneity. EhCK1 showed activity with choline but not ethanolamine. The biochemical characterization showed that it had a Vmax of 1.9 ± 0.1 µmol/min/mg. Its Km for choline and ATP was 203 ± 26 µM and 3.1 ± 0.4 mM, respectively. In contrast, EhCK2 enzymatic activity was only detected when Mn2+ was used as the co-factor instead of Mg2+ like other choline/ethanolamine kinases. Highly sensitive and specific antibody against EhCK1 was developed and used to confirm the endogenous EhCK1 expression using immunoblotting. CONCLUSIONS With the understanding of EhC/EK importance in phospholipid metabolism and their unique characteristic, EhC/EK could be a potential target for future anti-amoebiasis study.
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Affiliation(s)
- Chiat Han Chang
- School of Health Sciences, Health Campus, Universiti Sains Malaysia, 16150, Kubang Kerian, Kelantan, Malaysia
| | - Wei Cun See Too
- School of Health Sciences, Health Campus, Universiti Sains Malaysia, 16150, Kubang Kerian, Kelantan, Malaysia.
| | - Boon Huat Lim
- School of Health Sciences, Health Campus, Universiti Sains Malaysia, 16150, Kubang Kerian, Kelantan, Malaysia
| | - Ling Ling Few
- School of Health Sciences, Health Campus, Universiti Sains Malaysia, 16150, Kubang Kerian, Kelantan, Malaysia.
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10
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Bao HN, Yin J, Wang LY, Wang RH, Huang LQ, Chen YL, Wu JX, Sun JQ, Liu WW, Yao N, Li J. Aberrant accumulation of ceramides in mitochondria triggers cell death by inducing autophagy in Arabidopsis. J Exp Bot 2024; 75:1314-1330. [PMID: 38069660 DOI: 10.1093/jxb/erad456] [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] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Accepted: 12/05/2023] [Indexed: 02/29/2024]
Abstract
Sphingolipids are membrane lipids and play critical roles in signal transduction. Ceramides are central components of sphingolipid metabolism that are involved in cell death. However, the mechanism of ceramides regulating cell death in plants remains unclear. Here, we found that ceramides accumulated in mitochondria of accelerated cell death 5 mutant (acd5), and expression of mitochondrion-localized ceramide kinase (ACD5) suppressed mitochondrial ceramide accumulation and the acd5 cell death phenotype. Using immuno-electron microscopy, we observed hyperaccumulation of ceramides in acer acd5 double mutants, which are characterized by mutations in both ACER (alkaline ceramidase) and ACD5 genes. The results confirmed that plants with specific ceramide accumulation exhibited localization of ceramides to mitochondria, resulting in an increase in mitochondrial reactive oxygen species production. Interestingly, when compared with the wild type, autophagy-deficient mutants showed stronger resistance to ceramide-induced cell death. Lipid profiling analysis demonstrated that plants with ceramide accumulation exhibited a significant increase in phosphatidylethanolamine levels. Furthermore, exogenous ceramide treatment or endogenous ceramide accumulation induces autophagy. When exposed to exogenous ceramides, an increase in the level of the autophagy-specific ubiquitin-like protein, ATG8e, associated with mitochondria, where it directly bound to ceramides. Taken together, we propose that the accumulation of ceramides in mitochondria can induce cell death by regulating autophagy.
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Affiliation(s)
- He-Nan Bao
- State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, P. R. China
| | - Jian Yin
- State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, P. R. China
- College of JunCao Science and Ecology and Center for Horticultural Biology and Metabolomics, Fujian Agriculture and Forestry University, Fuzhou, Fujian, P. R. China
| | - Ling-Yan Wang
- State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, P. R. China
| | - Rui-Hua Wang
- State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, P. R. China
| | - Li-Qun Huang
- State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, P. R. China
| | - Yi-Li Chen
- State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, P. R. China
| | - Jian-Xin Wu
- State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, P. R. China
| | - Jia-Qi Sun
- State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, P. R. China
| | - Wei-Wei Liu
- State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, P. R. China
| | - Nan Yao
- State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, P. R. China
| | - Jian Li
- State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, P. R. China
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement & Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
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11
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Chou S, Alain S, Cervera C, Chemaly RF, Kotton CN, Lundgren J, Papanicolaou GA, Pereira MR, Wu JJ, Murray RA, Buss NE, Fournier M. Drug Resistance Assessed in a Phase 3 Clinical Trial of Maribavir Therapy for Refractory or Resistant Cytomegalovirus Infection in Transplant Recipients. J Infect Dis 2024; 229:413-421. [PMID: 37506264 PMCID: PMC10873177 DOI: 10.1093/infdis/jiad293] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [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: 05/31/2023] [Revised: 07/18/2023] [Accepted: 07/27/2023] [Indexed: 07/30/2023] Open
Abstract
BACKGROUND This drug resistance analysis of a randomized trial includes 234 patients receiving maribavir and 116 receiving investigator-assigned standard therapy (IAT), where 56% and 24%, respectively, cleared cytomegalovirus DNA at week 8 (treatment responders). METHODS Baseline and posttreatment plasma samples were tested for mutations conferring drug resistance in viral genes UL97, UL54, and UL27. RESULTS At baseline, genotypic testing revealed resistance to ganciclovir, foscarnet, or cidofovir in 56% of patients receiving maribavir and 68% receiving IAT, including 9 newly phenotyped mutations. Among them, 63% (maribavir) and 21% (IAT) were treatment responders. Detected baseline maribavir resistance mutations were UL27 L193F (n = 1) and UL97 F342Y (n = 3). Posttreatment, emergent maribavir resistance mutations were detected in 60 (26%) of those randomized to maribavir, including 49 (48%) of 103 nonresponders and 25 (86%) of the 29 nonresponders where viral DNA initially cleared then rebounded while on maribavir. The most common maribavir resistance mutations were UL97 T409M (n = 34), H411Y (n = 26), and C480F (n = 21), first detected 26 to 130 (median 56) days after starting maribavir. CONCLUSIONS Baseline maribavir resistance was rare. Drug resistance to standard cytomegalovirus antivirals did not preclude treatment response to maribavir. Rebound in plasma cytomegalovirus DNA while on maribavir strongly suggests emerging drug resistance. CLINICAL TRIALS REGISTRATION NCT02931539.
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Affiliation(s)
- Sunwen Chou
- Division of Infectious Diseases, Oregon Health and Science University, Portland, Oregon, USA
- Research and Development Service, Veterans Affairs Portland Health Care System, Portland, Oregon, USA
| | - Sophie Alain
- Department of Virology and National Reference Center for Herpesviruses, Limoges University Hospital, UMR Inserm 1092, University of Limoges, Limoges, France
| | - Carlos Cervera
- Division of Infectious Diseases, Department of Medicine, University of Alberta, Edmonton, Alberta, Canada
| | - Roy F Chemaly
- Department of Infectious Diseases, Infection Control, and Employee Health, University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Camille N Kotton
- Transplant and Immunocompromised Host Infectious Diseases, Infectious Diseases Division, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Jens Lundgren
- Centre for Health and Infectious Disease Research, Department of Infectious Diseases, Rigshospitalitet, University of Copenhagen, Copenhagen, Denmark
| | - Genovefa A Papanicolaou
- Infectious Disease Service, Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York, USA
- Department of Medicine, Weill Cornell Medicine, New York, New York, USA
| | - Marcus R Pereira
- Department of Medicine, Columbia University Medical Center, New York, New York, USA
| | - Jingyang J Wu
- Takeda Development Center Americas, Inc., Lexington, Massachusetts, USA
| | - Rose Ann Murray
- Takeda Development Center Americas, Inc., Lexington, Massachusetts, USA
| | - Neil E Buss
- Medical Expressions, Büren, Solothurn, Switzerland
| | - Martha Fournier
- Takeda Development Center Americas, Inc., Lexington, Massachusetts, USA
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12
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Nie D, Tang X, Deng H, Yang X, Tao J, Xu F, Liu Y, Wu K, Wang K, Mei Z, Huang A, Tang N. Metabolic Enzyme SLC27A5 Regulates PIP4K2A pre-mRNA Splicing as a Noncanonical Mechanism to Suppress Hepatocellular Carcinoma Metastasis. Adv Sci (Weinh) 2024; 11:e2305374. [PMID: 38059827 PMCID: PMC10837360 DOI: 10.1002/advs.202305374] [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] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 10/24/2023] [Indexed: 12/08/2023]
Abstract
Solute carrier family 27 member 5, a key enzyme in fatty acid transport and bile acid metabolism in the liver, is frequently expressed in low quantities in patients with hepatocellular carcinoma, resulting in poor prognosis. However, it is unclear whether SLC27A5 plays non-canonical functions and regulates HCC progression. Here, an unexpected non-canonical role of SLC27A5 is reported: regulating the alternative splicing of mRNA to inhibit the metastasis of HCC independently of its metabolic enzyme activity. Mechanistically, SLC27A5 interacts with IGF2BP3 to prevent its translocation into the nucleus, thereby inhibiting its binding to target mRNA and modulating PIP4K2A pre-mRNA splicing. Loss of SLC27A5 results in elevated levels of the PIP4K2A-S isoform, thus positively regulating phosphoinositide 3-kinase signaling via enhanced p85 stability in HCC. SLC27A5 restoration by AAV-Slc27a5 or IGF2BP3 RNA decoy oligonucleotides exerts an inhibitory effect on HCC metastasis with reduced expression of the PIP4K2A-S isoform. Therefore, PIP4K2A-S may be a novel target for treating HCC with SLC27A5 deficiency.
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Affiliation(s)
- Dan Nie
- Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education)Institute for Viral HepatitisDepartment of Infectious DiseasesThe Second Affiliated HospitalChongqing Medical UniversityChongqing400010China
- Department of GastroenterologyThe Chongqing Hospital of Traditional Chinese MedicineChongqing Academy of Traditional Chinese MedicineChongqing400016China
| | - Xin Tang
- Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education)Institute for Viral HepatitisDepartment of Infectious DiseasesThe Second Affiliated HospitalChongqing Medical UniversityChongqing400010China
| | - Haijun Deng
- Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education)Institute for Viral HepatitisDepartment of Infectious DiseasesThe Second Affiliated HospitalChongqing Medical UniversityChongqing400010China
| | - Xiaojun Yang
- Department of GastroenterologyThe Chongqing Hospital of Traditional Chinese MedicineChongqing Academy of Traditional Chinese MedicineChongqing400016China
| | - Junji Tao
- Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education)Institute for Viral HepatitisDepartment of Infectious DiseasesThe Second Affiliated HospitalChongqing Medical UniversityChongqing400010China
| | - Fengli Xu
- Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education)Institute for Viral HepatitisDepartment of Infectious DiseasesThe Second Affiliated HospitalChongqing Medical UniversityChongqing400010China
| | - Yi Liu
- Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education)Institute for Viral HepatitisDepartment of Infectious DiseasesThe Second Affiliated HospitalChongqing Medical UniversityChongqing400010China
| | - Kang Wu
- Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education)Institute for Viral HepatitisDepartment of Infectious DiseasesThe Second Affiliated HospitalChongqing Medical UniversityChongqing400010China
| | - Kai Wang
- Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education)Institute for Viral HepatitisDepartment of Infectious DiseasesThe Second Affiliated HospitalChongqing Medical UniversityChongqing400010China
| | - Zhechuan Mei
- Department of GastroenterologyThe Second Affiliated HospitalChongqing Medical UniversityChongqing400016China
| | - Ailong Huang
- Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education)Institute for Viral HepatitisDepartment of Infectious DiseasesThe Second Affiliated HospitalChongqing Medical UniversityChongqing400010China
| | - Ni Tang
- Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education)Institute for Viral HepatitisDepartment of Infectious DiseasesThe Second Affiliated HospitalChongqing Medical UniversityChongqing400010China
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13
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Chou S, Watanabe J. Ganciclovir and maribavir cross-resistance revisited: Relative drug susceptibilities of canonical cytomegalovirus mutants. Antiviral Res 2024; 222:105792. [PMID: 38163624 PMCID: PMC10922325 DOI: 10.1016/j.antiviral.2023.105792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 12/26/2023] [Accepted: 12/27/2023] [Indexed: 01/03/2024]
Abstract
Therapeutic use of maribavir for human cytomegalovirus infection has renewed attention to the extent of cross-resistance with ganciclovir as the existing standard therapy. Each drug selects in vivo for a characteristic set of resistance mutations in the viral UL97 kinase gene. To improve the calibration of relative susceptibilities to each drug, genetic variants at relevant UL97 codons were extensively phenotyped using the same baseline viral clone, cell culture conditions and growth readout. Ganciclovir-selected mutations at codons 460, 520, 592, 594, 595 and 603 conferred 2.8-fold (C603Y) to 12-fold (M460I) increases in ganciclovir 50% inhibitory concentrations (EC50) over wild type baseline, while conferring maribavir EC50 fold changes ranging from 0.21-fold (M460I) to 1.9-fold (A594V). Maribavir-selected mutations at codons 409, 411 and 480 conferred maribavir EC50 fold changes ranging from 17 (H411Y) to 210 (C480F), while conferring ganciclovir EC50 fold changes ranging from 0.7 (H411Y) to 2.3 (C480F). The P-loop substitution F342Y, selected by either drug, is confirmed to confer 4.7-fold and 6-fold increases in maribavir and ganciclovir EC50s respectively, and suggests this part of the ATP-binding domain of UL97 to be involved in moderate resistance to both drugs. The maribavir hypersensitivity of M460I and M460V may be advantageous.
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Affiliation(s)
- Sunwen Chou
- Department of Veterans Affairs Medical Center, Portland, OR, USA; Division of Infectious Diseases, Oregon Health and Science University, USA.
| | - Justin Watanabe
- Department of Veterans Affairs Medical Center, Portland, OR, USA
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14
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Chau L, Nael A, Sato M, Crawford JR. Rare AGK-BRAF gene fusion in an adolescent with supratentorial pleomorphic xanthoastrocytoma. BMJ Case Rep 2024; 17:e258878. [PMID: 38238163 PMCID: PMC10806860 DOI: 10.1136/bcr-2023-258878] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2024] Open
Affiliation(s)
- Lianne Chau
- School of Medicine, University of California San Diego, La Jolla, California, USA
| | - Ali Nael
- Department of Pathology, Children's Hospital of Orange County, Orange, California, USA
- Pathology, University of California Irvine Medical Center, Orange, California, USA
| | - Mariko Sato
- Pediatrics, Children's Hospital Orange County, Orange, California, USA
| | - John Ross Crawford
- Pediatrics, Children's Hospital Orange County, Orange, California, USA
- Pediatrics, University of California Irvine, Irvine, California, USA
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15
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Semnic I, Ristic T, Koprivsek K. PNKP mutation in a child: is there a firm line between MCSZ and AOA4 phenotype? Neurol Neurochir Pol 2024; 58:207-209. [PMID: 38230758 DOI: 10.5603/pjnns.97269] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Revised: 11/03/2023] [Accepted: 12/19/2023] [Indexed: 01/18/2024]
Affiliation(s)
- Isidora Semnic
- Medical Faculty of Novi Sad, Clinical Centre of Vojvodina, Novi Sad, Serbia.
| | - Tamara Ristic
- Child Neurology Department, Institute for Child and Youth Healthcare of Vojvodina, Novi Sad, Serbia
| | - Katarina Koprivsek
- Radiology Department, Institute for Child and Youth Healthcare of Vojvodina, Novi Sad, Serbia
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16
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Subramanian C, Frank MW, Sukhun R, Henry CE, Wade A, Harden ME, Rao S, Tangallapally R, Yun MK, White SW, Lee RE, Sinha U, Rock CO, Jackowski S. Pantothenate Kinase Activation Restores Brain Coenzyme A in a Mouse Model of Pantothenate Kinase-Associated Neurodegeneration. J Pharmacol Exp Ther 2024; 388:171-180. [PMID: 37875310 DOI: 10.1124/jpet.123.001919] [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: 09/07/2023] [Accepted: 09/28/2023] [Indexed: 10/26/2023] Open
Abstract
Pantothenate kinase-associated neurodegeneration (PKAN) is characterized by a motor disorder with combinations of dystonia, parkinsonism, and spasticity, leading to premature death. PKAN is caused by mutations in the PANK2 gene that result in loss or reduction of PANK2 protein function. PANK2 is one of three kinases that initiate and regulate coenzyme A biosynthesis from vitamin B5, and the ability of BBP-671, an allosteric activator of pantothenate kinases, to enter the brain and elevate coenzyme A was investigated. The metabolic stability, protein binding, and membrane permeability of BBP-671 all suggest that it has the physical properties required to cross the blood-brain barrier. BBP-671 was detected in plasma, liver, cerebrospinal fluid, and brain following oral administration in rodents, demonstrating the ability of BBP-671 to penetrate the brain. The pharmacokinetic and pharmacodynamic properties of orally administered BBP-671 evaluated in cannulated rats showed that coenzyme A (CoA) concentrations were elevated in blood, liver, and brain. BBP-671 elevation of whole-blood acetyl-CoA served as a peripheral pharmacodynamic marker and provided a suitable method to assess target engagement. BBP-671 treatment elevated brain coenzyme A concentrations and improved movement and body weight in a PKAN mouse model. Thus, BBP-671 crosses the blood-brain barrier to correct the brain CoA deficiency in a PKAN mouse model, resulting in improved locomotion and survival and providing a preclinical foundation for the development of BBP-671 as a potential treatment of PKAN. SIGNIFICANCE STATEMENT: The blood-brain barrier represents a major hurdle for drugs targeting brain metabolism. This work describes the pharmacokinetic/pharmacodynamic properties of BBP-671, a pantothenate kinase activator. BBP-671 crosses the blood-brain barrier to correct the neuron-specific coenzyme A (CoA) deficiency and improve motor function in a mouse model of pantothenate kinase-associated neurodegeneration. The central role of CoA and acetyl-CoA in intermediary metabolism suggests that pantothenate kinase activators may be useful in modifying neurological metabolic disorders.
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Affiliation(s)
- Chitra Subramanian
- Departments of Infectious Diseases (C.S., M.W.F., C.O.R., S.J.), Chemical Biology and Therapeutics (R.T., R.E.L.), Structural Biology (M.-K.Y., S.W.W.), and St. Jude Graduate School of Biomedical Sciences (S.W.W.), St. Jude Children's Research Hospital, Memphis, Tennessee; Department of Microbiology, Immunology, and Biochemistry, University of Tennessee Health Science Center, Memphis, Tennessee (S.W.W., C.O.R.); and CoA Therapeutics, Inc., a BridgeBio Pharma, Inc. Company, Palo Alto, California (R.S., C.E.H., A.W., M.E.H., S.R., U.S.)
| | - Matthew W Frank
- Departments of Infectious Diseases (C.S., M.W.F., C.O.R., S.J.), Chemical Biology and Therapeutics (R.T., R.E.L.), Structural Biology (M.-K.Y., S.W.W.), and St. Jude Graduate School of Biomedical Sciences (S.W.W.), St. Jude Children's Research Hospital, Memphis, Tennessee; Department of Microbiology, Immunology, and Biochemistry, University of Tennessee Health Science Center, Memphis, Tennessee (S.W.W., C.O.R.); and CoA Therapeutics, Inc., a BridgeBio Pharma, Inc. Company, Palo Alto, California (R.S., C.E.H., A.W., M.E.H., S.R., U.S.)
| | - Rajaa Sukhun
- Departments of Infectious Diseases (C.S., M.W.F., C.O.R., S.J.), Chemical Biology and Therapeutics (R.T., R.E.L.), Structural Biology (M.-K.Y., S.W.W.), and St. Jude Graduate School of Biomedical Sciences (S.W.W.), St. Jude Children's Research Hospital, Memphis, Tennessee; Department of Microbiology, Immunology, and Biochemistry, University of Tennessee Health Science Center, Memphis, Tennessee (S.W.W., C.O.R.); and CoA Therapeutics, Inc., a BridgeBio Pharma, Inc. Company, Palo Alto, California (R.S., C.E.H., A.W., M.E.H., S.R., U.S.)
| | - Christopher E Henry
- Departments of Infectious Diseases (C.S., M.W.F., C.O.R., S.J.), Chemical Biology and Therapeutics (R.T., R.E.L.), Structural Biology (M.-K.Y., S.W.W.), and St. Jude Graduate School of Biomedical Sciences (S.W.W.), St. Jude Children's Research Hospital, Memphis, Tennessee; Department of Microbiology, Immunology, and Biochemistry, University of Tennessee Health Science Center, Memphis, Tennessee (S.W.W., C.O.R.); and CoA Therapeutics, Inc., a BridgeBio Pharma, Inc. Company, Palo Alto, California (R.S., C.E.H., A.W., M.E.H., S.R., U.S.)
| | - Anna Wade
- Departments of Infectious Diseases (C.S., M.W.F., C.O.R., S.J.), Chemical Biology and Therapeutics (R.T., R.E.L.), Structural Biology (M.-K.Y., S.W.W.), and St. Jude Graduate School of Biomedical Sciences (S.W.W.), St. Jude Children's Research Hospital, Memphis, Tennessee; Department of Microbiology, Immunology, and Biochemistry, University of Tennessee Health Science Center, Memphis, Tennessee (S.W.W., C.O.R.); and CoA Therapeutics, Inc., a BridgeBio Pharma, Inc. Company, Palo Alto, California (R.S., C.E.H., A.W., M.E.H., S.R., U.S.)
| | - Mallory E Harden
- Departments of Infectious Diseases (C.S., M.W.F., C.O.R., S.J.), Chemical Biology and Therapeutics (R.T., R.E.L.), Structural Biology (M.-K.Y., S.W.W.), and St. Jude Graduate School of Biomedical Sciences (S.W.W.), St. Jude Children's Research Hospital, Memphis, Tennessee; Department of Microbiology, Immunology, and Biochemistry, University of Tennessee Health Science Center, Memphis, Tennessee (S.W.W., C.O.R.); and CoA Therapeutics, Inc., a BridgeBio Pharma, Inc. Company, Palo Alto, California (R.S., C.E.H., A.W., M.E.H., S.R., U.S.)
| | - Satish Rao
- Departments of Infectious Diseases (C.S., M.W.F., C.O.R., S.J.), Chemical Biology and Therapeutics (R.T., R.E.L.), Structural Biology (M.-K.Y., S.W.W.), and St. Jude Graduate School of Biomedical Sciences (S.W.W.), St. Jude Children's Research Hospital, Memphis, Tennessee; Department of Microbiology, Immunology, and Biochemistry, University of Tennessee Health Science Center, Memphis, Tennessee (S.W.W., C.O.R.); and CoA Therapeutics, Inc., a BridgeBio Pharma, Inc. Company, Palo Alto, California (R.S., C.E.H., A.W., M.E.H., S.R., U.S.)
| | - Rajendra Tangallapally
- Departments of Infectious Diseases (C.S., M.W.F., C.O.R., S.J.), Chemical Biology and Therapeutics (R.T., R.E.L.), Structural Biology (M.-K.Y., S.W.W.), and St. Jude Graduate School of Biomedical Sciences (S.W.W.), St. Jude Children's Research Hospital, Memphis, Tennessee; Department of Microbiology, Immunology, and Biochemistry, University of Tennessee Health Science Center, Memphis, Tennessee (S.W.W., C.O.R.); and CoA Therapeutics, Inc., a BridgeBio Pharma, Inc. Company, Palo Alto, California (R.S., C.E.H., A.W., M.E.H., S.R., U.S.)
| | - Mi-Kyung Yun
- Departments of Infectious Diseases (C.S., M.W.F., C.O.R., S.J.), Chemical Biology and Therapeutics (R.T., R.E.L.), Structural Biology (M.-K.Y., S.W.W.), and St. Jude Graduate School of Biomedical Sciences (S.W.W.), St. Jude Children's Research Hospital, Memphis, Tennessee; Department of Microbiology, Immunology, and Biochemistry, University of Tennessee Health Science Center, Memphis, Tennessee (S.W.W., C.O.R.); and CoA Therapeutics, Inc., a BridgeBio Pharma, Inc. Company, Palo Alto, California (R.S., C.E.H., A.W., M.E.H., S.R., U.S.)
| | - Stephen W White
- Departments of Infectious Diseases (C.S., M.W.F., C.O.R., S.J.), Chemical Biology and Therapeutics (R.T., R.E.L.), Structural Biology (M.-K.Y., S.W.W.), and St. Jude Graduate School of Biomedical Sciences (S.W.W.), St. Jude Children's Research Hospital, Memphis, Tennessee; Department of Microbiology, Immunology, and Biochemistry, University of Tennessee Health Science Center, Memphis, Tennessee (S.W.W., C.O.R.); and CoA Therapeutics, Inc., a BridgeBio Pharma, Inc. Company, Palo Alto, California (R.S., C.E.H., A.W., M.E.H., S.R., U.S.)
| | - Richard E Lee
- Departments of Infectious Diseases (C.S., M.W.F., C.O.R., S.J.), Chemical Biology and Therapeutics (R.T., R.E.L.), Structural Biology (M.-K.Y., S.W.W.), and St. Jude Graduate School of Biomedical Sciences (S.W.W.), St. Jude Children's Research Hospital, Memphis, Tennessee; Department of Microbiology, Immunology, and Biochemistry, University of Tennessee Health Science Center, Memphis, Tennessee (S.W.W., C.O.R.); and CoA Therapeutics, Inc., a BridgeBio Pharma, Inc. Company, Palo Alto, California (R.S., C.E.H., A.W., M.E.H., S.R., U.S.)
| | - Uma Sinha
- Departments of Infectious Diseases (C.S., M.W.F., C.O.R., S.J.), Chemical Biology and Therapeutics (R.T., R.E.L.), Structural Biology (M.-K.Y., S.W.W.), and St. Jude Graduate School of Biomedical Sciences (S.W.W.), St. Jude Children's Research Hospital, Memphis, Tennessee; Department of Microbiology, Immunology, and Biochemistry, University of Tennessee Health Science Center, Memphis, Tennessee (S.W.W., C.O.R.); and CoA Therapeutics, Inc., a BridgeBio Pharma, Inc. Company, Palo Alto, California (R.S., C.E.H., A.W., M.E.H., S.R., U.S.)
| | - Charles O Rock
- Departments of Infectious Diseases (C.S., M.W.F., C.O.R., S.J.), Chemical Biology and Therapeutics (R.T., R.E.L.), Structural Biology (M.-K.Y., S.W.W.), and St. Jude Graduate School of Biomedical Sciences (S.W.W.), St. Jude Children's Research Hospital, Memphis, Tennessee; Department of Microbiology, Immunology, and Biochemistry, University of Tennessee Health Science Center, Memphis, Tennessee (S.W.W., C.O.R.); and CoA Therapeutics, Inc., a BridgeBio Pharma, Inc. Company, Palo Alto, California (R.S., C.E.H., A.W., M.E.H., S.R., U.S.)
| | - Suzanne Jackowski
- Departments of Infectious Diseases (C.S., M.W.F., C.O.R., S.J.), Chemical Biology and Therapeutics (R.T., R.E.L.), Structural Biology (M.-K.Y., S.W.W.), and St. Jude Graduate School of Biomedical Sciences (S.W.W.), St. Jude Children's Research Hospital, Memphis, Tennessee; Department of Microbiology, Immunology, and Biochemistry, University of Tennessee Health Science Center, Memphis, Tennessee (S.W.W., C.O.R.); and CoA Therapeutics, Inc., a BridgeBio Pharma, Inc. Company, Palo Alto, California (R.S., C.E.H., A.W., M.E.H., S.R., U.S.)
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17
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Thuresson A, Brazina J, Akram T, Albrecht J, Dahl N, Soussi Zander C, Caldecott KW. Novel PNKP mutations associated with reduced DNA single-strand break repair and severe microcephaly, seizures, and developmental delay. Mol Genet Genomic Med 2024; 12:e2295. [PMID: 37916443 PMCID: PMC10767416 DOI: 10.1002/mgg3.2295] [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: 03/16/2023] [Revised: 08/18/2023] [Accepted: 09/19/2023] [Indexed: 11/03/2023] Open
Abstract
BACKGROUND Microcephaly with early-onset seizures (MCSZ) is a neurodevelopmental disorder caused by pathogenic variants in the DNA strand break repair protein, polynucleotide kinase 3'-phosphatase (PNKP). METHODS We have used whole genome sequencing and Sanger sequencing to identify disease-causing variants, followed by a minigene assay, Western blotting, alkaline comet assay, γH2AX, and ADP-ribose immunofluorescence. RESULTS Here, we describe a patient with compound heterozygous variants in PNKP, including a missense variant in the DNA phosphatase domain (T323M) and a novel splice acceptor site variant within the DNA kinase domain that we show leads to exon skipping. We show that primary fibroblasts derived from the patient exhibit greatly reduced levels of PNKP protein and reduced rates of DNA single-strand break repair, confirming that the mutated PNKP alleles are dysfunctional. CONCLUSION The data presented show that the detected compound heterozygous variants result in reduced levels of PNKP protein, which affect the repair of both oxidative and TOP1-induced single-strand breaks, and most likely causes MCSZ in this patient.
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Affiliation(s)
- Ann‐Charlotte Thuresson
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory UppsalaUppsala UniversityUppsalaSweden
| | - Jan Brazina
- Genome Damage and Stability CentreUniversity of SussexBrightonUK
| | - Talia Akram
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory UppsalaUppsala UniversityUppsalaSweden
- Present address:
Departments of Pediatrics, Neurology and PhysiologyNorthwestern University Feinberg School of Medicine, Ann & Robert H. Lurie Children's Hospital of ChicagoChicagoIllinoisUSA
| | | | - Niklas Dahl
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory UppsalaUppsala UniversityUppsalaSweden
| | - Cecilia Soussi Zander
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory UppsalaUppsala UniversityUppsalaSweden
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18
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Carter J, Hulse M, Sivakumar M, Burtell J, Thodima V, Wang M, Agarwal A, Vykuntam K, Spruance J, Bhagwat N, Rager J, Ruggeri B, Scherle P, Ito K. PRMT5 Inhibitors Regulate DNA Damage Repair Pathways in Cancer Cells and Improve Response to PARP Inhibition and Chemotherapies. Cancer Res Commun 2023; 3:2233-2243. [PMID: 37861290 PMCID: PMC10627093 DOI: 10.1158/2767-9764.crc-23-0070] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 08/04/2023] [Accepted: 10/10/2023] [Indexed: 10/21/2023]
Abstract
Expression of protein arginine methyltransferase 5 (PRMT5) is highly positively correlated to DNA damage repair (DDR) and DNA replication pathway genes in many types of cancer cells, including ovarian and breast cancer. In the current study, we investigated whether pharmacologic inhibition of PRMT5 downregulates DDR/DNA replication pathway genes and sensitizes cancer cells to chemotherapy and PARP inhibition. Potent and selective PRMT5 inhibitors significantly downregulate expression of multiple DDR and DNA replication genes in cancer cells. Mechanistically, PRMT5 inhibition reduces the presence of PRMT5 and H4R3me2s on promoter regions of DDR genes such as BRCA1/2, RAD51, and ATM. PRMT5 inhibition also promotes global alternative splicing changes. Our data suggest that PRMT5 inhibition regulates expression of FANCA, PNKP, and ATM by promoting exon skipping and intron retention. Combining C220 or PRT543 with olaparib or chemotherapeutic agents such as cisplatin demonstrates a potent synergistic interaction in breast and ovarian cancer cells in vitro. Moreover, combination of PRT543 with olaparib effectively inhibits the growth of patient-derived breast and ovarian cancer xenografts. Furthermore, PRT543 treatment significantly inhibits growth of olaparib-resistant tumors in vivo. These studies reveal a novel mechanism of PRMT5 inhibition and suggest beneficial combinatorial effects with other therapies, particularly in patients with tumors that are resistant to therapies dependent on DNA damage as their mechanism of action. SIGNIFICANCE Patients with advanced cancers frequently develop resistance to chemotherapy or PARP inhibitors mainly due to circumvention and/or restoration of the inactivated DDR pathway genes. We demonstrate that inhibition of PRMT5 significantly downregulates a broad range of the DDR and DNA replication pathway genes. PRMT5 inhibitors combined with chemotherapy or PARP inhibitors demonstrate synergistic suppression of cancer cell proliferation and growth in breast and ovarian tumor models, including PARP inhibitor-resistant tumors.
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Affiliation(s)
- Jack Carter
- Prelude Therapeutics Incorporated, Wilmington, Delaware
| | - Michael Hulse
- Prelude Therapeutics Incorporated, Wilmington, Delaware
| | | | | | | | - Min Wang
- Prelude Therapeutics Incorporated, Wilmington, Delaware
| | | | | | | | - Neha Bhagwat
- Prelude Therapeutics Incorporated, Wilmington, Delaware
| | - Joseph Rager
- Prelude Therapeutics Incorporated, Wilmington, Delaware
| | - Bruce Ruggeri
- Prelude Therapeutics Incorporated, Wilmington, Delaware
| | - Peggy Scherle
- Prelude Therapeutics Incorporated, Wilmington, Delaware
| | - Koichi Ito
- Prelude Therapeutics Incorporated, Wilmington, Delaware
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19
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Jung IR, Ahima RS, Kim SF. Inositol polyphosphate multikinase modulates free fatty acids-induced insulin resistance in primary mouse hepatocytes. J Cell Biochem 2023; 124:1695-1704. [PMID: 37795573 DOI: 10.1002/jcb.30478] [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: 06/07/2023] [Revised: 08/28/2023] [Accepted: 09/12/2023] [Indexed: 10/06/2023]
Abstract
Insulin resistance is a critical mediator of the development of nonalcoholic fatty liver disease (NAFLD). An excess influx of fatty acids to the liver is thought to be a pathogenic cause of insulin resistance and the development of NAFLD. Although elevated levels of free fatty acids (FFA) in plasma contribute to inducing insulin resistance and NAFLD, the molecular mechanism is not completely understood. This study aimed to determine whether inositol polyphosphate multikinase (IPMK), a regulator of insulin signaling, plays any role in FFA-induced insulin resistance in primary hepatocytes. Here, we show that excess FFA decreased IPMK expression, and blockade of IPMK decrease attenuated the FFA-induced suppression of protein kinase B (Akt) phosphorylation in primary mouse hepatocytes (PMH). Moreover, overexpression of IPMK prevented the FFA-induced suppression of Akt phosphorylation by insulin, while knockout of IPMK exacerbated insulin resistance in PMH. In addition, treatment with MG132, a proteasomal inhibitor, inhibits FFA-induced decrease in IPMK expression and Akt phosphorylation in PMH. Furthermore, treatment with the antioxidant N-acetyl cysteine (NAC) significantly attenuated the FFA-induced reduction of IPMK and restored FFA-induced insulin resistance in PMH. In conclusion, our findings suggest that excess FFA reduces IPMK expression and contributes to the FFA-induced decrease in Akt phosphorylation in PMH, leading to insulin resistance. Our study highlights IPMK as a potential therapeutic target for preventing insulin resistance and NAFLD.
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Affiliation(s)
- Ik-Rak Jung
- Department of Medicine, Division of Endocrinology, Diabetes and Metabolism, Johns Hopkins University, Baltimore, Maryland, USA
| | - Rexford S Ahima
- Department of Medicine, Division of Endocrinology, Diabetes and Metabolism, Johns Hopkins University, Baltimore, Maryland, USA
| | - Sangwon F Kim
- Department of Medicine, Division of Endocrinology, Diabetes and Metabolism, Johns Hopkins University, Baltimore, Maryland, USA
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20
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Tran VK, Vu CD, Tran HA, Lien NTK, Tung NV, Lan NN, Tran HT, Hoang NH. The first Vietnamese patient who presented late onset of pantothenate kinase-associated neurodegeneration diagnosed by whole exome sequencing: A case report. Medicine (Baltimore) 2023; 102:e34853. [PMID: 37904482 PMCID: PMC10615552 DOI: 10.1097/md.0000000000034853] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Accepted: 07/19/2023] [Indexed: 11/01/2023] Open
Abstract
RATIONALE Pantothenate kinase-associated neurodegeneration (PKAN), also called Hallervorden-Spatz syndrome, is a rare autosomal recessive disease associated with brain iron accumulation and characterized by progressive dystonia, dementia, and dysarthria symptoms. PKAN, caused by a defective pantothenate kinase 2 (PANK2) gene, is the most common neurodegeneration with a brain iron accumulation (NBIA) group. The "eye of the tiger" sign in the magnetic resonance imaging demonstrated a bilateral hyperintense signal in the basal ganglia region on T2-weighted images, which is a characteristic feature of the diagnosis. PKAN is classified into 2 main types. The early-onset type (classic type) with rapid progression is characterized by symptoms of gait impairment and dystonia leading to loss of ambulation in early childhood. In the later-onset type (atypical type), slow progression usually takes place in the second decade of life with symptoms of neurodegeneration, dystonia, dysarthria, rigidity, choreoathetosis, and motor impairment. Until now, PKAN patients have only been reported in a few countries in Asia such as China, Korea, India, Iran, Taiwan, and Thailand. PATIENT CONCERNS Here we report the first case of PKAN in Vietnam. The patient had a late onset but the disease progresses rapidly with symptoms of dyskinesia, dysphagia, and difficulty speaking. DIAGNOSES Pantothenate kinase-associated neurodegeneration. INTERVENTIONS Whole exome sequencing was performed to identify heterozygous mutations in the PANK2 gene (NM_153638.4) (c.856C>T, p.Arg286Cys and c.1351C>T, p.Arg451Ter) that has been confirmed as the cause of the disease. OUTCOMES In this study, the first Vietnamese patient with late-onset PKAN was diagnosed by the whole exome sequencing method. LESSONS The patient's case marks an important milestone for the first case in Vietnam. The results of the study will provide a scientific basis for clinicians in the diagnosis and genetic counseling of patients.
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Affiliation(s)
| | - Chi Dung Vu
- The Center of Endocrinology, Metabolism, Genetics, and Molecular Therapy, Vietnam National Children’s Hospital, Hanoi, Vietnam
| | | | - Nguyen Thi Kim Lien
- Institute of Genome Research, Vietnam Academy of Science and Technology, Hanoi, Vietnam
| | - Nguyen Van Tung
- Institute of Genome Research, Vietnam Academy of Science and Technology, Hanoi, Vietnam
| | - Nguyen Ngoc Lan
- Institute of Genome Research, Vietnam Academy of Science and Technology, Hanoi, Vietnam
| | | | - Nguyen Huy Hoang
- Institute of Genome Research, Vietnam Academy of Science and Technology, Hanoi, Vietnam
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Hanoi, Vietnam
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21
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García-Arroyo R, Domènech EB, Herrera-Úbeda C, Asensi MA, Núñez de Arenas C, Cuezva JM, Garcia-Fernàndez J, Pallardó FV, Mirra S, Marfany G. Exacerbated response to oxidative stress in the Retinitis Pigmentosa Cerkl KD/KO mouse model triggers retinal degeneration pathways upon acute light stress. Redox Biol 2023; 66:102862. [PMID: 37660443 PMCID: PMC10491808 DOI: 10.1016/j.redox.2023.102862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 08/22/2023] [Accepted: 08/25/2023] [Indexed: 09/05/2023] Open
Abstract
The retina is particularly vulnerable to genetic and environmental alterations that generate oxidative stress and cause cellular damage in photoreceptors and other retinal neurons, eventually leading to cell death. CERKL (CERamide Kinase-Like) mutations cause Retinitis Pigmentosa and Cone-Rod Dystrophy in humans, two disorders characterized by photoreceptor degeneration and progressive vision loss. CERKL is a resilience gene against oxidative stress, and its overexpression protects cells from oxidative stress-induced apoptosis. Besides, CERKL contributes to stress granule-formation and regulates mitochondrial dynamics in the retina. Using the CerklKD/KO albino mouse model, which recapitulates the human disease, we aimed to study the impact of Cerkl knockdown on stress response and activation of photoreceptor death mechanisms upon light/oxidative stress. After acute light injury, we assessed immediate or late retinal stress response, by combining both omic and non-omic approaches. Our results show that Cerkl knockdown increases ROS levels and causes a basal exacerbated stress state in the retina, through alterations in glutathione metabolism and stress granule production, overall compromising an adequate response to additional oxidative damage. As a consequence, several cell death mechanisms are triggered in CerklKD/KO retinas after acute light stress. Our studies indicate that Cerkl gene is a pivotal player in regulating light-challenged retinal homeostasis and shed light on how mutations in CERKL lead to blindness by dysregulation of the basal oxidative stress response in the retina.
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Affiliation(s)
- Rocío García-Arroyo
- Department of Genetics, Microbiology and Statistics, Universitat de Barcelona, Barcelona, Spain; Institut de Biomedicina de la Universitat de Barcelona - Institut de Recerca Sant Joan de Déu (IBUB-IRSJD), Barcelona, Spain; Centro de Investigación Biomédica En Red (CIBER) de Enfermedades Raras (CIBERER), ISCIII, Madrid, Spain
| | - Elena B Domènech
- Department of Genetics, Microbiology and Statistics, Universitat de Barcelona, Barcelona, Spain; Institut de Biomedicina de la Universitat de Barcelona - Institut de Recerca Sant Joan de Déu (IBUB-IRSJD), Barcelona, Spain; Centro de Investigación Biomédica En Red (CIBER) de Enfermedades Raras (CIBERER), ISCIII, Madrid, Spain
| | - Carlos Herrera-Úbeda
- Department of Genetics, Microbiology and Statistics, Universitat de Barcelona, Barcelona, Spain; Institut de Biomedicina de la Universitat de Barcelona - Institut de Recerca Sant Joan de Déu (IBUB-IRSJD), Barcelona, Spain
| | - Miguel A Asensi
- Centro de Investigación Biomédica En Red (CIBER) de Enfermedades Raras (CIBERER), ISCIII, Madrid, Spain; Department of Physiology, University of Valencia-INCLIVA, Valencia, Spain
| | - Cristina Núñez de Arenas
- Centro de Investigación Biomédica En Red (CIBER) de Enfermedades Raras (CIBERER), ISCIII, Madrid, Spain; Departament of Molecular Biology, Centro de Biología Molecular Severo Ochoa, Consejo Superior de Investigaciones Científicas-Universidad Autónoma de Madrid (CSIC-UAM), Madrid, Spain; Instituto de Investigación Hospital 12 de Octubre, Madrid, Spain
| | - José M Cuezva
- Centro de Investigación Biomédica En Red (CIBER) de Enfermedades Raras (CIBERER), ISCIII, Madrid, Spain; Departament of Molecular Biology, Centro de Biología Molecular Severo Ochoa, Consejo Superior de Investigaciones Científicas-Universidad Autónoma de Madrid (CSIC-UAM), Madrid, Spain; Instituto de Investigación Hospital 12 de Octubre, Madrid, Spain
| | - Jordi Garcia-Fernàndez
- Department of Genetics, Microbiology and Statistics, Universitat de Barcelona, Barcelona, Spain; Institut de Biomedicina de la Universitat de Barcelona - Institut de Recerca Sant Joan de Déu (IBUB-IRSJD), Barcelona, Spain
| | - Federico V Pallardó
- Centro de Investigación Biomédica En Red (CIBER) de Enfermedades Raras (CIBERER), ISCIII, Madrid, Spain; Department of Physiology, University of Valencia-INCLIVA, Valencia, Spain
| | - Serena Mirra
- Department of Genetics, Microbiology and Statistics, Universitat de Barcelona, Barcelona, Spain; Institut de Biomedicina de la Universitat de Barcelona - Institut de Recerca Sant Joan de Déu (IBUB-IRSJD), Barcelona, Spain; Centro de Investigación Biomédica En Red (CIBER) de Enfermedades Raras (CIBERER), ISCIII, Madrid, Spain.
| | - Gemma Marfany
- Department of Genetics, Microbiology and Statistics, Universitat de Barcelona, Barcelona, Spain; Institut de Biomedicina de la Universitat de Barcelona - Institut de Recerca Sant Joan de Déu (IBUB-IRSJD), Barcelona, Spain; Centro de Investigación Biomédica En Red (CIBER) de Enfermedades Raras (CIBERER), ISCIII, Madrid, Spain.
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22
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Zhang X, He J, Ren D. Commentary on: The actin bundling activity of ITPKA mainly accounts for its migration-promoting effect in lung cancer cells. Biosci Rep 2023; 43:BSR20230057. [PMID: 37664985 PMCID: PMC10500224 DOI: 10.1042/bsr20230057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 08/24/2023] [Accepted: 09/01/2023] [Indexed: 09/05/2023] Open
Abstract
1,4,5-triphosphate 3-kinase A (ITPKA) was first described and characterized by Irvine et al. in 1986 and cloned by Takazawa et al. in 1990. It is one of the components of the Ca2+ and calmodulin signaling pathway and a substrate for cAMP-dependent kinase (PKA) and protein kinase C (PKC), and is mainly involved in the regulation of intracellular inositol polyphosphate signaling molecules. Through a series of studies, Sabine's team has found that ITPKA expression was up-regulated in a variety of cancer cells, and silencing ITPKA inhibited while overexpressing ITPKA promoted cancer cell migration in vitro and metastasis in vivo. The latest research from Sabine's team has demonstrated that in H1299 lung cancer cells, the mechanism by which ITPKA promoted migration and invasion was predominantly depending on the ability of binding to F-actin, which will induce cancer cells to form a tight flexible actin networks. Small molecule compounds targeting the IP3 kinase activity of ITPKA protein may only inhibit the migration and invasion of cancer cells caused by the enhanced ITPKA kinase activity under ATP stimulation, but not the cytoskeletal remodeling caused by the binding of ITPKA protein to F-actin and the driven migration and invasion of cancer cells. Therefore, targeted therapeutic strategy focusing on blocking the binding of ITPKA to F-actin is indispensable when designing the inhibitors targeting ITPKA protein.
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Affiliation(s)
- Xin Zhang
- Postdoctoral Innovation Practice Base, Postdoctoral Research Center of Jiangmen Central Hospital, Southern Medical University, Jiangmen 529030, China
- Clinical Experimental Center, Jiangmen Key Laboratory of Clinical Biobank and Translational Research, Jiangmen Central Hospital, Jiangmen 529030, China
| | - Jiadi He
- Clinical Experimental Center, Jiangmen Key Laboratory of Clinical Biobank and Translational Research, Jiangmen Central Hospital, Jiangmen 529030, China
| | - Dong Ren
- Department of Pathology, University of California Irvine Medical Center, Orange, CA 92868, U.S.A
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23
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Chen H, Luo S, Chen H, Zhang C. ATF3 regulates SPHK1 in cardiomyocyte injury via endoplasmic reticulum stress. Immun Inflamm Dis 2023; 11:e998. [PMID: 37773702 PMCID: PMC10540145 DOI: 10.1002/iid3.998] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 07/19/2023] [Accepted: 08/19/2023] [Indexed: 10/01/2023] Open
Abstract
AIM Endoplasmic reticulum (ER) stress is common in different human pathologies, including cardiac diseases. Sphingosine kinase-1 (SPHK1) represents an important player in cardiac growth and function. Nevertheless, its function in cardiomyocyte ER stress remains vague. This study sought to evaluate the mechanism through which SPHK1 might influence ER stress during myocardial infarction (MI). METHODS MI-related GEO data sets were queried to screen differentially expressed genes. Murine HL-1 cells exposed to oxygen-glucose deprivation (OGD) and mice with MI were induced, followed by gene expression manipulation using short hairpin RNAs and overexpression vectors. The activating transcription factor 3 (ATF3) and SPHK1 expression was examined in cells and tissues. Cell counting kit-8, TUNEL, DHE, HE, and Masson's staining were conducted in vitro and in vivo. The inflammatory factor concentrations in mouse serum were measured using ELISA. Finally, the transcriptional regulation of SPHK1 by ATF3 was validated. RESULTS ATF3 and SPHK1 were upregulated in vivo and in vitro. ATF3 downregulation reduced the SPHK1 transcription. ATF3 and SPHK1 downregulation increased the viability of OGD-treated HL-1 cells and decreased apoptosis, oxidative stress, and ER stress. ATF3 and SPHK1 downregulation narrowed the infarction area and attenuated myocardial fibrosis in mice, along with reduced inflammation in the serum and ER stress in the myocardium. In contrast, SPHK1 reduced the protective effect of ATF3 downregulation in vitro and in vivo. CONCLUSIONS ATF3 downregulation reduced SPHK1 expression to attenuate cardiomyocyte injury in MI.
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Affiliation(s)
- Huiling Chen
- Division of CardiologyThe First Affiliated Hospital of Chongqing Medical UniversityChongqingP.R. China
| | - Suxin Luo
- Division of CardiologyThe First Affiliated Hospital of Chongqing Medical UniversityChongqingP.R. China
| | - Huamei Chen
- Division of CardiologyThe First Affiliated Hospital of Kunming Medical UniversityKunmingYunnanP.R. China
| | - Cong Zhang
- Department of EmergencyThe People's Hospital of ChuXiong YiZu Autonomous PrefectureChuxiongYunnanP.R. China
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24
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Zhang CX, Lin YL, Lu FF, Yu LN, Liu Y, Zhou JD, Kong N, Li D, Yan GJ, Sun HX, Cao GY. Krüppel-like factor 12 regulates aging ovarian granulosa cell apoptosis by repressing SPHK1 transcription and sphingosine-1-phosphate (S1P) production. J Biol Chem 2023; 299:105126. [PMID: 37543362 PMCID: PMC10463260 DOI: 10.1016/j.jbc.2023.105126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 07/21/2023] [Accepted: 07/26/2023] [Indexed: 08/07/2023] Open
Abstract
Oxidative stress triggered by aging, radiation, or inflammation impairs ovarian function by inducing granulosa cell (GC) apoptosis. However, the mechanism inducing GC apoptosis has not been characterized. Here, we found that ovarian GCs from aging patients showed increased oxidative stress, enhanced reactive oxygen species activity, and significantly decreased expression of the known antiapoptotic factor sphingosine-1-phosphate/sphingosine kinase 1 (SPHK1) in GCs. Interestingly, the expression of Krüppel-like factor 12 (KLF12) was significantly increased in the ovarian GCs of aging patients. Furthermore, we determined that KLF12 was significantly upregulated in hydrogen peroxide-treated GCs and a 3-nitropropionic acid-induced in vivo model of ovarian oxidative stress. This phenotype was further confirmed to result from inhibition of SPHK1 by KLF12. Interestingly, when endogenous KLF12 was knocked down, it rescued oxidative stress-induced apoptosis. Meanwhile, supplementation with SPHK1 partially reversed oxidative stress-induced apoptosis. However, this function was lost in SPHK1 with deletion of the binding region to the KLF12 promoter. SPHK1 reversed apoptosis caused by hydrogen peroxide-KLF12 overexpression, a result further confirmed in an in vitro ovarian culture model and an in vivo 3-nitropropionic acid-induced ovarian oxidative stress model. Overall, our study reveals that KLF12 is involved in regulating apoptosis induced by oxidative stress in aging ovarian GCs and that sphingosine-1-phosphate/SPHK1 can rescue GC apoptosis by interacting with KLF12 in negative feedback.
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Affiliation(s)
- Chun-Xue Zhang
- Center for Reproductive Medicine and Obstetrics and Gynecology, Nanjing Drum Tower Hospital Clinical College of Nanjing Medical University, Nanjing, China
| | - Yu-Ling Lin
- Center for Reproductive Medicine and Obstetrics and Gynecology, Nanjing Drum Tower Hospital Clinical College of Nanjing Medical University, Nanjing, China; State Key Laboratory of Reproductive Medicine and Offspring Health, Nanjing Medical University, Nanjing, China
| | - Fei-Fei Lu
- Center for Reproductive Medicine and Obstetrics and Gynecology, Nanjing Drum Tower Hospital Clinical College of Nanjing Medical University, Nanjing, China
| | - Li-Na Yu
- Center for Reproductive Medicine and Obstetrics and Gynecology, Nanjing Drum Tower Hospital Clinical College of Nanjing Medical University, Nanjing, China
| | - Yang Liu
- Center for Reproductive Medicine and Obstetrics and Gynecology, Nanjing Drum Tower Hospital Clinical College of Nanjing Medical University, Nanjing, China
| | - Ji-Dong Zhou
- Center for Reproductive Medicine and Obstetrics and Gynecology, Nanjing Drum Tower Hospital Clinical College of Nanjing Medical University, Nanjing, China
| | - Na Kong
- Center for Reproductive Medicine and Obstetrics and Gynecology, Nanjing Drum Tower Hospital Clinical College of Nanjing Medical University, Nanjing, China
| | - Dong Li
- Center for Reproductive Medicine and Obstetrics and Gynecology, Nanjing Drum Tower Hospital Clinical College of Nanjing Medical University, Nanjing, China
| | - Gui-Jun Yan
- Center for Reproductive Medicine and Obstetrics and Gynecology, Nanjing Drum Tower Hospital Clinical College of Nanjing Medical University, Nanjing, China; State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, China.
| | - Hai-Xiang Sun
- Center for Reproductive Medicine and Obstetrics and Gynecology, Nanjing Drum Tower Hospital Clinical College of Nanjing Medical University, Nanjing, China; State Key Laboratory of Reproductive Medicine and Offspring Health, Nanjing Medical University, Nanjing, China.
| | - Guang-Yi Cao
- Center for Reproductive Medicine and Obstetrics and Gynecology, Nanjing Drum Tower Hospital Clinical College of Nanjing Medical University, Nanjing, China.
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Zhang Y, Xie H, Liang G, Qin Y, Wei X, Ning S, Liang Y, Liang X, Xie Y, Lin Z, Zhu D, Lin J, Xiong F, Xu X, Shang X. A novel gain-of-function PIP4K2A mutation elevates the expression of β-globin and aggravates the severity of α-thalassemia. Br J Haematol 2023; 202:1018-1023. [PMID: 37423903 DOI: 10.1111/bjh.18967] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 06/21/2023] [Accepted: 06/26/2023] [Indexed: 07/11/2023]
Abstract
Haemoglobin H (Hb H) disease (intermediate status of α-thalassemia) shows marked phenotypic variability from asymptomatic to severe anaemia. Apart from the combined β-thalassemia allele ameliorating clinical severity, reports of genetic modifier genes affecting the phenotype of Hb H disease are scarce which bring inconvenience to precise diagnosis and genetic counselling of the patients. Here, we present a novel mutation (c.948C>A, p.S316R) in the PIP4K2A gene in a female Hb H disease patient who displayed moderate anaemia and a relatively high Hb H level. Haematological analysis in her family members revealed that individuals carrying this mutation have upregulated β-globin expression, leading to a more imbalanced β/α-globin ratio and more Hb H inclusion bodies in peripheral red blood cells. According to functional experiments, the mutant PIP4K2A protein exhibits enhanced protein stability, increased kinase activity and a stronger regulatory effect on downstream proteins, suggesting a gain-of-function mutation. Moreover, introduction of the S316R mutation into HUDEP-2 cells increased expression of β-globin, further inhibiting erythroid differentiation and terminal enucleation. Thus, the S316R mutation is a novel genetic factor associated with β-globin expression, and the PIP4K2A gene is a new potential modifier gene affecting the α-thalassemia phenotype.
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Affiliation(s)
- Yanxia Zhang
- Department of Medical Genetics, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
| | - Hongting Xie
- Department of Medical Genetics, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
| | - Guanxia Liang
- Department of Medical Genetics, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
| | - Yunrong Qin
- Department of Clinical Laboratory, Yulin Women and Children Health Care Hospital, Yulin, China
| | - Xiaofeng Wei
- Department of Medical Genetics, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
| | - Sisi Ning
- Department of Clinical Laboratory, Yulin Women and Children Health Care Hospital, Yulin, China
| | - Yi Liang
- Department of Clinical Laboratory, Yulin Women and Children Health Care Hospital, Yulin, China
| | - Xiongda Liang
- Department of Medical Genetics, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
| | - Yuling Xie
- Department of Clinical Laboratory, Yulin Women and Children Health Care Hospital, Yulin, China
| | - Zezhang Lin
- Department of Medical Genetics, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
| | - Dina Zhu
- Department of Medical Genetics, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
| | - Jiaqiong Lin
- Department of Medical Genetics, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
| | - Fu Xiong
- Department of Medical Genetics, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
| | - Xiangming Xu
- Department of Medical Genetics, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
- Innovation Center for Diagnostics and Treatment of Thalassemia, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Xuan Shang
- Department of Medical Genetics, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
- Innovation Center for Diagnostics and Treatment of Thalassemia, Nanfang Hospital, Southern Medical University, Guangzhou, China
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26
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Yang X, Wang J, Li S, Li X, Gong J, Yan Z, Zhou H, Wu C, Liu X. Structural and biochemical insights into the molecular mechanism of TRPT1 for nucleic acid ADP-ribosylation. Nucleic Acids Res 2023; 51:7649-7665. [PMID: 37334830 PMCID: PMC10415124 DOI: 10.1093/nar/gkad525] [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: 09/30/2022] [Accepted: 06/06/2023] [Indexed: 06/21/2023] Open
Abstract
Nucleic acid ADP-ribosylation has been established as a novel modification found in a wide diversity of prokaryotic and eukaryotic organisms. tRNA 2'-phosphotransferase 1 (TRPT1/TPT1/KptA) possesses ADP-ribosyltransferase (ART) activity and is able to ADP-ribosylate nucleic acids. However, the underlying molecular mechanism remains elusive. Here, we determined crystal structures of TRPT1s in complex with NAD+ from Homo sapiens, Mus musculus and Saccharomyces cerevisiae. Our results revealed that the eukaryotic TRPT1s adopt common mechanisms for both NAD+ and nucleic acid substrate binding. The conserved SGR motif induces a significant conformational change in the donor loop upon NAD+ binding to facilitate the catalytic reaction of ART. Moreover, the nucleic acid-binding residue redundancy provides structural flexibility to accommodate different nucleic acid substrates. Mutational assays revealed that TRPT1s employ different catalytic and nucleic acid-binding residues to perform nucleic acid ADP-ribosylation and RNA 2'-phosphotransferase activities. Finally, cellular assays revealed that the mammalian TRPT1 is able to promote endocervical HeLa cell survival and proliferation. Together, our results provide structural and biochemical insights into the molecular mechanism of TRPT1 for nucleic acid ADP-ribosylation.
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Affiliation(s)
- Xiaoyun Yang
- College of Life Sciences, Hebei Innovation Center for Bioengineering and Biotechnology, Institute of Life Sciences and Green Development, Hebei University, Baoding 071002, Hebei, China
- School of Life Sciences, Southern University of Science and Technology, Shenzhen 518055, Guangdong, China
| | - Jiaxu Wang
- College of Life Sciences, Hebei Innovation Center for Bioengineering and Biotechnology, Institute of Life Sciences and Green Development, Hebei University, Baoding 071002, Hebei, China
| | - Simin Li
- College of Life Sciences, Hebei Innovation Center for Bioengineering and Biotechnology, Institute of Life Sciences and Green Development, Hebei University, Baoding 071002, Hebei, China
| | - Xiaobing Li
- College of Life Sciences, Hebei Innovation Center for Bioengineering and Biotechnology, Institute of Life Sciences and Green Development, Hebei University, Baoding 071002, Hebei, China
| | - Jingjing Gong
- College of Life Sciences, Hebei Innovation Center for Bioengineering and Biotechnology, Institute of Life Sciences and Green Development, Hebei University, Baoding 071002, Hebei, China
| | - Zhenzhen Yan
- College of Life Sciences, Hebei Innovation Center for Bioengineering and Biotechnology, Institute of Life Sciences and Green Development, Hebei University, Baoding 071002, Hebei, China
| | - Huan Zhou
- Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, China
| | - Chen Wu
- College of Life Sciences, Hebei Innovation Center for Bioengineering and Biotechnology, Institute of Life Sciences and Green Development, Hebei University, Baoding 071002, Hebei, China
| | - Xiuhua Liu
- College of Life Sciences, Hebei Innovation Center for Bioengineering and Biotechnology, Institute of Life Sciences and Green Development, Hebei University, Baoding 071002, Hebei, China
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Cao X, Lenk GM, Meisler MH. Altered phenotypes due to genetic interaction between the mouse phosphoinositide biosynthesis genes Fig4 and Pip4k2c. G3 (Bethesda) 2023; 13:jkad007. [PMID: 36691351 PMCID: PMC10411592 DOI: 10.1093/g3journal/jkad007] [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] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Accepted: 01/02/2023] [Indexed: 01/25/2023]
Abstract
Loss-of-function mutations of FIG4 are responsible for neurological disorders in human and mouse that result from reduced abundance of the signaling lipid PI(3,5)P2. In contrast, loss-of-function mutations of the phosphoinositide kinase PIP4K2C result in elevated abundance of PI(3,5)P2. These opposing effects on PI(3,5)P2 suggested that we might be able to compensate for deficiency of FIG4 by reducing expression of PIP4K2C. To test this hypothesis in a whole animal model, we generated triallelic mice with genotype Fig 4-/-, Pip4k2c+/-; these mice are null for Fig 4 and haploinsufficient for Pip4k2c. The neonatal lethality of Fig 4 null mice in the C57BL/6J strain background was rescued by reduced expression of Pip4k2c. The lysosome enlargement characteristic of Fig 4 null cells was also reduced by heterozygous loss of Pip4k2c. The data demonstrate interaction between these two genes, and suggest that inhibition of the kinase PIPK4C2 could be a target for treatment of FIG4 deficiency disorders such as Charcot-Marie-Tooth Type 4J and Yunis-Varón Syndrome.
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Affiliation(s)
- Xu Cao
- Department of Human Genetics, University of Michigan, Ann Arbor, MI 48109-5618, USA
| | - Guy M Lenk
- Department of Human Genetics, University of Michigan, Ann Arbor, MI 48109-5618, USA
| | - Miriam H Meisler
- Department of Human Genetics, University of Michigan, Ann Arbor, MI 48109-5618, USA
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Huang L, Han F, Huang Y, Liu J, Liao X, Cao Z, Li W. Sphk1 deficiency induces apoptosis and developmental defects and premature death in zebrafish. Fish Physiol Biochem 2023; 49:737-750. [PMID: 37464180 DOI: 10.1007/s10695-023-01215-3] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Accepted: 06/24/2023] [Indexed: 07/20/2023]
Abstract
The sphk1 gene plays a crucial role in cell growth and signal transduction. However, the developmental functions of the sphk1 gene during early vertebrate zebrafish embryo remain not completely understood. In this study, we constructed zebrafish sphk1 mutants through CRISPR/Cas9 to investigate its role in zebrafish embryonic development. Knockout of the sphk1 gene was found to cause abnormal development in zebrafish embryos, such as darkening and atrophy of the head, trunk deformities, pericardial edema, retarded yolk sac development, reduced heart rate, and premature death. The acetylcholinesterase activity was significantly increased after the knockout of sphk1, and some of the neurodevelopmental genes and neurotransmission system-related genes were expressed abnormally. The deletion of sphk1 led to abnormal expression of immune genes, as well as a significant decrease in the number of hematopoietic stem cells and neutrophils. The mRNA levels of cardiac development-related genes were significantly decreased. In addition, cell apoptosis increases in the sphk1 mutants, and the proliferation of head cells decreases. Therefore, our study has shown that the sphk1 is a key gene for zebrafish embryonic survival and regulation of organ development. It deepened our understanding of its physiological function. Our study lays the foundation for investigating the mechanism of the sphk1 gene in early zebrafish embryonic development.
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Affiliation(s)
- Ling Huang
- Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture and Rural Affairs, Jimei University, Xiamen, China
| | - Fang Han
- Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture and Rural Affairs, Jimei University, Xiamen, China
| | - Ying Huang
- Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture and Rural Affairs, Jimei University, Xiamen, China
| | - Jieping Liu
- Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture and Rural Affairs, Jimei University, Xiamen, China
| | - Xinjun Liao
- Jiangxi Engineering Laboratory of Zebrafish Modeling and Drug Screening for Human Diseases, Jiangxi Key Laboratory of Developmental Biology of Organs, College of Life Sciences, Jinggangshan University, Ji'an, China
| | - Zigang Cao
- Jiangxi Engineering Laboratory of Zebrafish Modeling and Drug Screening for Human Diseases, Jiangxi Key Laboratory of Developmental Biology of Organs, College of Life Sciences, Jinggangshan University, Ji'an, China.
| | - Wanbo Li
- Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture and Rural Affairs, Jimei University, Xiamen, China.
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Recio V, González I, Tarragó D. Cytomegalovirus drug resistance mutations in transplant recipients with suspected resistance. Virol J 2023; 20:153. [PMID: 37464399 PMCID: PMC10355059 DOI: 10.1186/s12985-023-02127-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Accepted: 07/11/2023] [Indexed: 07/20/2023] Open
Abstract
Resistant CMV infections are challenging complications after SOT and HSCT. Prompt recognition of ARMs is imperative for appropriate therapy. 108 plasma samples from 96 CMV + transplant recipients with suspected resistance were analysed in CNM in a retrospective nationwide study from January 2018 to July 2022 for resistance genotyping. ARMs in UL97 and UL54 were found in 26.87% (18/67) and 10.60% (7/66) of patients, respectively. Patients' ARM distribution in UL97 was as follows: L595S n = 3; L595S/M460I n = 1; L595S/N510S n = 1; L595W n = 1; C603W n = 4; A594V n = 3; A594E n = 1; C607Y n = 1; L397R/T409M/H411L/M460I n = 1; L397I n = 1; H520Q n = 1; four patients showed ARMs in UL54 as well (F412C n = 1; T503I n = 2; P522S n = 1), whereas three patients exhibited ARMs in UL54 only (L501I/T503I/L516R/A834P n = 1; A987G n = 2). L516R in UL54 and L397R/I and H411L in UL97 have been found for the first time in a clinical sample. L595S/W was the most prevalent ARM found to lend resistance to GCV. In UL54 all ARMs lent resistance to GCV and CDV. In addition, A834P, found in one patient, also lent resistance to FOS. CMV load did not differ significantly in patients with or without ARMs, and no differences were found either between patients with ARMs in UL97 or in UL97 and UL54. Despite extensive use of classical antivirals for the treatment of CMV infection after HSCT and SOT, ARMs occurred mainly in viral UL97 kinase, which suggests that CDV and mostly FOS continue to be useful alternatives to nucleoside analogues after genotypic detection of ARMs.
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Affiliation(s)
- Vanessa Recio
- Centro Nacional de Microbiología, Instituto de Salud Carlos III, Majadahonda- Pozuelo km 2, Madrid, 28220, Spain
| | - Irene González
- Centro Nacional de Microbiología, Instituto de Salud Carlos III, Majadahonda- Pozuelo km 2, Madrid, 28220, Spain
| | - David Tarragó
- Centro Nacional de Microbiología, Instituto de Salud Carlos III, Majadahonda- Pozuelo km 2, Madrid, 28220, Spain.
- CIBER Epidemiology and Public Health (CIBERESP), Madrid, Spain.
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Meyers TJ, Yin J, Herrera VA, Pressman AR, Hoffmann TJ, Schaefer C, Avins AL, Choquet H. Transcriptome-wide association study identifies novel candidate susceptibility genes for migraine. HGG Adv 2023; 4:100211. [PMID: 37415806 PMCID: PMC10319829 DOI: 10.1016/j.xhgg.2023.100211] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Accepted: 06/05/2023] [Indexed: 07/08/2023] Open
Abstract
Genome-wide association studies (GWASs) have identified more than 130 genetic susceptibility loci for migraine; however, how most of these loci impact migraine development is unknown. To identify novel genes associated with migraine and interpret the transcriptional products of those genes, we conducted a transcriptome-wide association study (TWAS). We performed tissue-specific and multi-tissue TWAS analyses to assess associations between imputed gene expression from 53 tissues and migraine susceptibility using FUSION software. Meta-analyzed GWAS summary statistics from 26,052 migraine cases and 487,214 controls, all of European ancestry and from two cohorts (the Kaiser Permanente GERA and the UK Biobank), were used. We evaluated the associations for genes after conditioning on variant-level effects from GWAS, and we tested for colocalization of GWAS migraine-associated loci and expression quantitative trait loci (eQTLs). Across tissue-specific and multi-tissue analyses, we identified 53 genes for which genetically predicted gene expression was associated with migraine after correcting for multiple testing. Of these 53 genes, 10 (ATF5, CNTNAP1, KTN1-AS1, NEIL1, NEK4, NNT, PNKP, RUFY2, TUBG2, and VAT1) did not overlap known migraine-associated loci identified from GWAS. Tissue-specific analysis identified 45 gene-tissue pairs and cardiovascular tissues represented the highest proportion of the Bonferroni-significant gene-tissue pairs (n = 22 [49%]), followed by brain tissues (n = 6 [13%]), and gastrointestinal tissues (n = 4 [9%]). Colocalization analyses provided evidence of shared genetic variants underlying eQTL and GWAS signals in 18 of the gene-tissue pairs (40%). Our TWAS reports novel genes for migraine and highlights the important contribution of brain, cardiovascular, and gastrointestinal tissues in migraine susceptibility.
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Affiliation(s)
- Travis J. Meyers
- Division of Research, Kaiser Permanente Northern California, Oakland, CA 94612, USA
| | - Jie Yin
- Division of Research, Kaiser Permanente Northern California, Oakland, CA 94612, USA
| | - Victor A. Herrera
- Division of Research, Kaiser Permanente Northern California, Oakland, CA 94612, USA
| | - Alice R. Pressman
- Department of Epidemiology and Biostatistics, University of California, San Francisco, San Francisco, CA 94158, USA
- Sutter Health, San Francisco, CA 94107, USA
| | - Thomas J. Hoffmann
- Department of Epidemiology and Biostatistics, University of California, San Francisco, San Francisco, CA 94158, USA
- Institute for Human Genetics, University of California, San Francisco, San Francisco, CA 94143, USA
| | - Catherine Schaefer
- Division of Research, Kaiser Permanente Northern California, Oakland, CA 94612, USA
| | - Andrew L. Avins
- Division of Research, Kaiser Permanente Northern California, Oakland, CA 94612, USA
- Department of Epidemiology and Biostatistics, University of California, San Francisco, San Francisco, CA 94158, USA
| | - Hélène Choquet
- Division of Research, Kaiser Permanente Northern California, Oakland, CA 94612, USA
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Zhang L, Song W, Li T, Mu Y, Zhang P, Hu J, Lin H, Zhang J, Gao H, Zhang L. Redox switching mechanism of the adenosine 5'-phosphosulfate kinase domain (APSK2) of human PAPS synthase 2. Structure 2023; 31:826-835.e3. [PMID: 37207644 DOI: 10.1016/j.str.2023.04.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 03/24/2023] [Accepted: 04/24/2023] [Indexed: 05/21/2023]
Abstract
Adenosine 5'-phosphosulfate kinase (APSK) catalyzes the rate-limiting biosynthetic step of the universal sulfuryl donor 3'-phosphoadenosine-5'-phosphosulfate (PAPS). In higher eukaryotes, the APSK and ATP sulfurylase (ATPS) domains are fused in a single chain. Humans have two bifunctional PAPS synthetase isoforms: PAPSS1 with the APSK1 domain and PAPSS2 containing the APSK2 domain. APSK2 displays a distinct higher activity for PAPSS2-mediated PAPS biosynthesis during tumorigenesis. How APSK2 achieves excess PAPS production has remained unclear. APSK1 and APSK2 lack the conventional redox-regulatory element present in plant PAPSS homologs. Here we elucidate the dynamic substrate recognition mechanism of APSK2. We discover that APSK1 contains a species-specific Cys-Cys redox-regulatory element that APSK2 lacks. The absence of this element in APSK2 enhances its enzymatic activity for excess PAPS production and promotes cancer development. Our results help to understand the roles of human PAPSSs during cell development and may facilitate PAPSS2-specific drug discovery.
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Affiliation(s)
- Lin Zhang
- Department of Pharmacology and Chemical Biology, State Key Laboratory of Oncogenes and Related Genes, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Wenyan Song
- Department of Pharmacology and Chemical Biology, State Key Laboratory of Oncogenes and Related Genes, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Tingting Li
- Department of Pharmacology and Chemical Biology, State Key Laboratory of Oncogenes and Related Genes, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Yajuan Mu
- Department of Pharmacology and Chemical Biology, State Key Laboratory of Oncogenes and Related Genes, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Pan Zhang
- Department of Pharmacology and Chemical Biology, State Key Laboratory of Oncogenes and Related Genes, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Jingyan Hu
- Department of Pharmacology and Chemical Biology, State Key Laboratory of Oncogenes and Related Genes, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Houwen Lin
- Research Centre for Marine Drugs, State Key Laboratory of Oncogene and Related Genes, Department of Pharmacy, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China; Institute of Marine Biomedicine, Shenzhen Polytechnic, Shenzhen 518055, China
| | - Jian Zhang
- Medicinal Bioinformatics Center, Shanghai JiaoTong University School of Medicine, Shanghai China
| | - Hai Gao
- Key Laboratory of Medical Epigenetics and Metabolism, Institutes of Biomedical Sciences, Shanghai Medical College, Fudan University, Shanghai 200032, China.
| | - Liang Zhang
- Department of Pharmacology and Chemical Biology, State Key Laboratory of Oncogenes and Related Genes, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China.
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Zhang R, Zhang K. Mitochondrial NAD kinase in health and disease. Redox Biol 2023; 60:102613. [PMID: 36689815 PMCID: PMC9873681 DOI: 10.1016/j.redox.2023.102613] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Revised: 01/12/2023] [Accepted: 01/16/2023] [Indexed: 01/19/2023] Open
Abstract
Nicotinamide adenine dinucleotide phosphate (NADP), a co-enzyme and an electron carrier, plays crucial roles in numerous biological functions, including cellular metabolism and antioxidation. Because NADP is subcellular-membrane impermeable, eukaryotes compartmentalize NAD kinases (NADKs), the NADP biosynthetic enzymes. Mitochondria are fundamental organelles for energy production through oxidative phosphorylation. Ten years after the discovery of the mitochondrial NADK (known as MNADK or NADK2), a significant amount of knowledge has been obtained regarding its functions, mechanism of action, human biology, mouse models, crystal structures, and post-translation modifications. NADK2 phosphorylates NAD(H) to generate mitochondrial NADP(H). NADK2-deficient patients suffered from hyperlysinemia, elevated plasma C10:2-carnitine (due to the inactivity of relevant NADP-dependent enzymes), and neuronal development defects. Nadk2-deficient mice recapitulate key features of NADK2-deficient patients, including metabolic and neuronal abnormalities. Crystal structures of human NADK2 show a dimer, with the NADP+-binding site located at the dimer interface. NADK2 activity is highly regulated by post-translational modifications, including S188 phosphorylation, K76 and K304 acetylation, and C193 S-nitrosylation; mutations in each site affect NADK2 activity and function. In mice, hepatic Nadk2 functions as a major metabolic regulator upon increased energy demands by regulating sirtuin 3 activity and fatty acid oxidation. Hopefully, future research on NADK2 will not only elucidate its functional roles in health and disease but will also pave the way for novel therapeutics for both rare and common diseases, including NADK2 deficiency and metabolic syndrome.
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Affiliation(s)
- Ren Zhang
- Center for Molecular Medicine and Genetics, Wayne State University School of Medicine, Detroit, MI, 48201, USA.
| | - Kezhong Zhang
- Center for Molecular Medicine and Genetics, Wayne State University School of Medicine, Detroit, MI, 48201, USA
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Chakraborty A, Tapryal N, Islam A, Sarker AH, Manohar K, Mitra J, Hegde ML, Hazra T. Human DNA polymerase η promotes RNA-templated error-free repair of DNA double-strand breaks. J Biol Chem 2023; 299:102991. [PMID: 36758800 PMCID: PMC10011834 DOI: 10.1016/j.jbc.2023.102991] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 01/20/2023] [Accepted: 01/31/2023] [Indexed: 02/10/2023] Open
Abstract
A growing body of evidence indicates that RNA plays a critical role in orchestrating DNA double-strand break repair (DSBR). Recently, we showed that homologous nascent RNA can be used as a template for error-free repair of double-strand breaks (DSBs) in the transcribed genome and to restore the missing sequence at the break site via the transcription-coupled classical nonhomologous end-joining (TC-NHEJ) pathway. TC-NHEJ is a complex multistep process in which a reverse transcriptase (RT) is essential for synthesizing the DNA strand from template RNA. However, the identity of the RT involved in the TC-NHEJ pathway remained unknown. Here, we report that DNA polymerase eta (Pol η), known to possess RT activity, plays a critical role in TC-NHEJ. We found that Pol η forms a multiprotein complex with RNAP II and other TC-NHEJ factors, while also associating with nascent RNA. Moreover, purified Pol η, along with DSBR proteins PNKP, XRCC4, and Ligase IV can fully repair RNA templated 3'-phosphate-containing gapped DNA substrate. In addition, we demonstrate here that Pol η deficiency leads to accumulation of R-loops and persistent strand breaks in the transcribed genes. Finally, we determined that, in Pol η depleted but not in control cells, TC-NHEJ-mediated repair was severely abrogated when a reporter plasmid containing a DSB with several nucleotide deletion within the E. coli lacZ gene was introduced for repair in lacZ-expressing mammalian cells. Thus, our data strongly suggest that RT activity of Pol η is required in error-free DSBR.
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Affiliation(s)
- Anirban Chakraborty
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Internal Medicine, Sealy Center for Molecular Medicine, University of Texas Medical Branch, Galveston, Texas, USA
| | - Nisha Tapryal
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Internal Medicine, Sealy Center for Molecular Medicine, University of Texas Medical Branch, Galveston, Texas, USA
| | - Azharul Islam
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Internal Medicine, Sealy Center for Molecular Medicine, University of Texas Medical Branch, Galveston, Texas, USA
| | - Altaf H Sarker
- Life Sciences Division, Department of Cancer and DNA Damage Responses, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Kodavati Manohar
- Department of Neurosurgery, Center for Neuroregeneration, The Houston Methodist Research Institute, Houston, Texas, USA
| | - Joy Mitra
- Department of Neurosurgery, Center for Neuroregeneration, The Houston Methodist Research Institute, Houston, Texas, USA
| | - Muralidhar L Hegde
- Department of Neurosurgery, Center for Neuroregeneration, The Houston Methodist Research Institute, Houston, Texas, USA
| | - Tapas Hazra
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Internal Medicine, Sealy Center for Molecular Medicine, University of Texas Medical Branch, Galveston, Texas, USA.
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Weigel C, Maczis MA, Palladino END, Green CD, Maceyka M, Guo C, Wang XY, Dozmorov MG, Milstien S, Spiegel S. Sphingosine Kinase 2 in Stromal Fibroblasts Creates a Hospitable Tumor Microenvironment in Breast Cancer. Cancer Res 2023; 83:553-567. [PMID: 36541910 PMCID: PMC9931683 DOI: 10.1158/0008-5472.can-22-1638] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 11/08/2022] [Accepted: 12/16/2022] [Indexed: 12/24/2022]
Abstract
Reciprocal interactions between breast cancer cells and the tumor microenvironment (TME) are important for cancer progression and metastasis. We report here that the deletion or inhibition of sphingosine kinase 2 (SphK2), which produces sphingosine-1-phosphate (S1P), markedly suppresses syngeneic breast tumor growth and lung metastasis in mice by creating a hostile microenvironment for tumor growth and invasion. SphK2 deficiency decreased S1P and concomitantly increased ceramides, including C16-ceramide, in stromal fibroblasts. Ceramide accumulation suppressed activation of cancer-associated fibroblasts (CAF) by upregulating stromal p53, which restrained production of tumor-promoting factors to reprogram the TME and to restrict breast cancer establishment. Ablation of p53 in SphK2-deficient fibroblasts reversed these effects, enabled CAF activation and promoted tumor growth and invasion. These data uncovered a novel role of SphK2 in regulating non-cell-autonomous functions of p53 in stromal fibroblasts and their transition to tumor-promoting CAFs, paving the way for the development of a strategy to target the TME and to enhance therapeutic efficacy. SIGNIFICANCE Sphingosine kinase 2 (SphK2) facilitates the activation of stromal fibroblasts to tumor-promoting cancer-associated fibroblasts by suppressing host p53 activity, revealing SphK2 as a potential target to reprogram the TME.
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Affiliation(s)
- Cynthia Weigel
- Department of Biochemistry and Molecular Biology and the Massey Cancer Center, Virginia Commonwealth University School of Medicine, Richmond, VA 23298
| | - Melissa A. Maczis
- Department of Biochemistry and Molecular Biology and the Massey Cancer Center, Virginia Commonwealth University School of Medicine, Richmond, VA 23298
| | - Elisa N. D. Palladino
- Department of Biochemistry and Molecular Biology and the Massey Cancer Center, Virginia Commonwealth University School of Medicine, Richmond, VA 23298
| | - Christopher D. Green
- Department of Biochemistry and Molecular Biology and the Massey Cancer Center, Virginia Commonwealth University School of Medicine, Richmond, VA 23298
| | - Michael Maceyka
- Department of Biochemistry and Molecular Biology and the Massey Cancer Center, Virginia Commonwealth University School of Medicine, Richmond, VA 23298
| | - Chunqing Guo
- Department of Human and Molecular Genetics, Virginia Commonwealth University School of Medicine, Richmond, VA 23298
| | - Xiang-Yang Wang
- Department of Human and Molecular Genetics, Virginia Commonwealth University School of Medicine, Richmond, VA 23298
| | - Mikhail G. Dozmorov
- Departments of Biostatistics and Pathology, Virginia Commonwealth University School of Medicine, Richmond, VA 23298
| | - Sheldon Milstien
- Department of Biochemistry and Molecular Biology and the Massey Cancer Center, Virginia Commonwealth University School of Medicine, Richmond, VA 23298
| | - Sarah Spiegel
- Department of Biochemistry and Molecular Biology and the Massey Cancer Center, Virginia Commonwealth University School of Medicine, Richmond, VA 23298
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Li R, Rao JN, Smith AD, Chung HK, Xiao L, Wang JY, Turner DJ. miR-542-5p targets c-myc and negates the cell proliferation effect of SphK1 in intestinal epithelial cells. Am J Physiol Cell Physiol 2023; 324:C565-C572. [PMID: 36622069 PMCID: PMC9942902 DOI: 10.1152/ajpcell.00145.2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Revised: 12/22/2022] [Accepted: 12/28/2022] [Indexed: 01/10/2023]
Abstract
Intestinal epithelial barrier defects occur commonly during a variety of pathological conditions, though their underlying mechanisms are not completely understood. Sphingosine-1-phosphate (S1P) has been shown to be a critical regulator of proliferation and of maintenance of an intact intestinal epithelial barrier, as is also sphingosine kinase 1 (SphK1), the rate-limiting enzyme for S1P synthesis. SphK1 has been shown to modulate its effect on intestinal epithelial proliferation through increased levels of c-myc. We conducted genome-wide profile analysis to search for differential microRNA expression related to overexpressed SphK1 demonstrating adjusted expression of microRNA 542-5p (miR-542-5p). Here, we show that miR-542-5p is regulated by SphK1 activity and is an effector of c-myc translation that ultimately serves as a critical regulator of the intestinal epithelial barrier. miR-542-5p directly regulates c-myc translation through direct binding to the c-myc mRNA. Exogenous S1P analogs administered in vivo protect murine intestinal barrier from damage due to mesenteric ischemia reperfusion, and damaged intestinal tissue had increased levels of miR-542-5p. These results indicate that miR-542-5p plays a critical role in the regulation of S1P-mediated intestinal barrier function, and may highlight a novel role in potential therapies.
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Affiliation(s)
- Ruiyun Li
- Cell Biology Group, Department of Surgery, University of Maryland School of Medicine, Baltimore, Maryland
- Baltimore VA Medical Center, Baltimore, Maryland
| | - Jaladanki N Rao
- Cell Biology Group, Department of Surgery, University of Maryland School of Medicine, Baltimore, Maryland
- Baltimore VA Medical Center, Baltimore, Maryland
| | - Alexis D Smith
- Cell Biology Group, Department of Surgery, University of Maryland School of Medicine, Baltimore, Maryland
| | - Hee Kyoung Chung
- Cell Biology Group, Department of Surgery, University of Maryland School of Medicine, Baltimore, Maryland
- Baltimore VA Medical Center, Baltimore, Maryland
| | - Lan Xiao
- Cell Biology Group, Department of Surgery, University of Maryland School of Medicine, Baltimore, Maryland
- Baltimore VA Medical Center, Baltimore, Maryland
| | - Jian-Ying Wang
- Cell Biology Group, Department of Surgery, University of Maryland School of Medicine, Baltimore, Maryland
- Baltimore VA Medical Center, Baltimore, Maryland
- Cell Biology Group, Department of Pathology, University of Maryland School of Medicine, Baltimore, Maryland
| | - Douglas J Turner
- Cell Biology Group, Department of Surgery, University of Maryland School of Medicine, Baltimore, Maryland
- Baltimore VA Medical Center, Baltimore, Maryland
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Yıldız Ç, Gezgin Yıldırım D, Inci A, Tümer L, Cengiz Ergin FB, Sunar Yayla ENS, Esmeray Şenol P, Karaçayır N, Eğritaş Gürkan Ö, Okur I, Ezgü FS, Bakkaloğlu SA. A possibly new autoinflammatory disease due to compound heterozygous phosphomevalonate kinase gene mutation. Joint Bone Spine 2023; 90:105490. [PMID: 36410683 DOI: 10.1016/j.jbspin.2022.105490] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 10/28/2022] [Accepted: 11/07/2022] [Indexed: 11/19/2022]
Abstract
BACKGROUND Mevalonate kinase (MVK) plays a role in cholesterol and non-sterol isoprenoid biosynthesis and its deficiency-related diseases are caused by bi-allelic pathogenic mutations in the MVK gene, (MVK), which leads to rare hereditary autoinflammatory diseases. The disease may manifest different clinical phenotypes depending on the degree of the deficiency in the enzyme activity. The complete deficiency of the enzyme activity results in the severe metabolic disease called mevalonic aciduria, while a partial deficiency results in a broad spectrum of clinical presentations called hyper-immunoglobulin D syndrome (HIDS). Serum immunoglobulin (Ig) D and urine mevalonic acid levels may be increased during inflammatory attacks of HIDS. CASE PRESENTATION Herein, for the first time in the literature, we present a 6-year-old male patient who suffered from recurrent episodes of fever, polyarthritis, skin rash, diarrhea, abdominal pain, and inflammatory bowel disease-like manifestations with elevated levels of serum IgD, and urine mevalonic acid. Eventually we detected compound heterozygous mutations in the phosphomevalonate kinase (PMVK) gene coding the second enzyme after mevalonate kinase in the mevalonate pathway. CONCLUSION For patients presenting with HIDS-like findings, disease exacerbations and persistent chronic inflammation, and having high urinary mevalonic acid and serum IgD levels, raising suspicion in terms of MVK deficiency (MVKD), it is recommended to study all mevalonate pathway enzymes, even if there is no mutation in the MVK gene. It should be kept in mind that novel mutations might be seen such as PMVK gene.
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Affiliation(s)
- Çisem Yıldız
- Department of Pediatric Rheumatology, Gazi University Faculty of Medicine, Ankara 06560, Turkey
| | - Deniz Gezgin Yıldırım
- Department of Pediatric Rheumatology, Gazi University Faculty of Medicine, Ankara 06560, Turkey
| | - Asli Inci
- Department of Pediatric Metabolism and Nutrition, Gazi University Faculty of Medicine, Ankara, Turkey
| | - Leyla Tümer
- Department of Pediatric Metabolism and Nutrition, Gazi University Faculty of Medicine, Ankara, Turkey
| | - Filiz Basak Cengiz Ergin
- Department of Pediatric Metabolism and Nutrition, Gazi University Faculty of Medicine, Ankara, Turkey
| | | | - Pelin Esmeray Şenol
- Department of Pediatric Rheumatology, Gazi University Faculty of Medicine, Ankara 06560, Turkey
| | - Nihal Karaçayır
- Department of Pediatric Rheumatology, Gazi University Faculty of Medicine, Ankara 06560, Turkey
| | - Ödül Eğritaş Gürkan
- Department of Pediatric Gastroenterology and Hepatology, Gazi University Faculty of Medicine, Ankara, Turkey
| | - Ilyas Okur
- Department of Pediatric Metabolism and Nutrition, Gazi University Faculty of Medicine, Ankara, Turkey
| | - Fatih S Ezgü
- Department of Pediatric Metabolism and Nutrition, Gazi University Faculty of Medicine, Ankara, Turkey
| | - Sevcan A Bakkaloğlu
- Department of Pediatric Rheumatology, Gazi University Faculty of Medicine, Ankara 06560, Turkey.
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Laha NP, Giehl RFH, Riemer E, Qiu D, Pullagurla NJ, Schneider R, Dhir YW, Yadav R, Mihiret YE, Gaugler P, Gaugler V, Mao H, Zheng N, von Wirén N, Saiardi A, Bhattacharjee S, Jessen HJ, Laha D, Schaaf G. INOSITOL (1,3,4) TRIPHOSPHATE 5/6 KINASE1-dependent inositol polyphosphates regulate auxin responses in Arabidopsis. Plant Physiol 2022; 190:2722-2738. [PMID: 36124979 PMCID: PMC9706486 DOI: 10.1093/plphys/kiac425] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Accepted: 08/13/2022] [Indexed: 06/15/2023]
Abstract
The combinatorial phosphorylation of myo-inositol results in the generation of different inositol phosphates (InsPs), of which phytic acid (InsP6) is the most abundant species in eukaryotes. InsP6 is also an important precursor of the higher phosphorylated inositol pyrophosphates (PP-InsPs), such as InsP7 and InsP8, which are characterized by a diphosphate moiety and are also ubiquitously found in eukaryotic cells. While PP-InsPs regulate various cellular processes in animals and yeast, their biosynthesis and functions in plants has remained largely elusive because plant genomes do not encode canonical InsP6 kinases. Recent work has shown that Arabidopsis (Arabidopsis thaliana) INOSITOL (1,3,4) TRIPHOSPHATE 5/6 KINASE1 (ITPK1) and ITPK2 display in vitro InsP6 kinase activity and that, in planta, ITPK1 stimulates 5-InsP7 and InsP8 synthesis and regulates phosphate starvation responses. Here we report a critical role of ITPK1 in auxin-related processes that is independent of the ITPK1-controlled regulation of phosphate starvation responses. Those processes include primary root elongation, root hair development, leaf venation, thermomorphogenic and gravitropic responses, and sensitivity to exogenously applied auxin. We found that the recombinant auxin receptor complex, consisting of the F-Box protein TRANSPORT INHIBITOR RESPONSE1 (TIR1), ARABIDOPSIS SKP1 HOMOLOG 1 (ASK1), and the transcriptional repressor INDOLE-3-ACETIC ACID INDUCIBLE 7 (IAA7), binds to anionic inositol polyphosphates with high affinity. We further identified a physical interaction between ITPK1 and TIR1, suggesting a localized production of 5-InsP7, or another ITPK1-dependent InsP/PP-InsP isomer, to activate the auxin receptor complex. Finally, we demonstrate that ITPK1 and ITPK2 function redundantly to control auxin responses, as deduced from the auxin-insensitive phenotypes of itpk1 itpk2 double mutant plants. Our findings expand the mechanistic understanding of auxin perception and suggest that distinct inositol polyphosphates generated near auxin receptors help to fine-tune auxin sensitivity in plants.
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Affiliation(s)
| | - Ricardo F H Giehl
- Department of Physiology & Cell Biology, Leibniz-Institute of Plant Genetics and Crop Plant Research, Gatersleben 06466, Germany
| | - Esther Riemer
- Department of Plant Nutrition, Institute of Crop Science and Resource Conservation, Rheinische Friedrich-Wilhelms-Universität Bonn, Bonn 53115, Germany
| | - Danye Qiu
- Department of Chemistry and Pharmacy & CIBSS–The Center for Biological Signalling Studies, University of Freiburg, Freiburg 79104, Germany
| | - Naga Jyothi Pullagurla
- Department of Biochemistry, Indian Institute of Science, Bengaluru 560012, Karnataka, India
| | - Robin Schneider
- Department of Plant Nutrition, Institute of Crop Science and Resource Conservation, Rheinische Friedrich-Wilhelms-Universität Bonn, Bonn 53115, Germany
| | | | - Ranjana Yadav
- Department of Biochemistry, Indian Institute of Science, Bengaluru 560012, Karnataka, India
| | - Yeshambel Emewodih Mihiret
- Department of Plant Nutrition, Institute of Crop Science and Resource Conservation, Rheinische Friedrich-Wilhelms-Universität Bonn, Bonn 53115, Germany
| | - Philipp Gaugler
- Department of Plant Nutrition, Institute of Crop Science and Resource Conservation, Rheinische Friedrich-Wilhelms-Universität Bonn, Bonn 53115, Germany
| | - Verena Gaugler
- Department of Plant Nutrition, Institute of Crop Science and Resource Conservation, Rheinische Friedrich-Wilhelms-Universität Bonn, Bonn 53115, Germany
| | - Haibin Mao
- Department of Pharmacology, Howard Hughes Medical Institute, University of Washington, Seattle, Washington 98195, USA
| | - Ning Zheng
- Department of Pharmacology, Howard Hughes Medical Institute, University of Washington, Seattle, Washington 98195, USA
| | - Nicolaus von Wirén
- Department of Physiology & Cell Biology, Leibniz-Institute of Plant Genetics and Crop Plant Research, Gatersleben 06466, Germany
| | - Adolfo Saiardi
- Medical Research Council Laboratory for Molecular Cell Biology (MRC-LMCB), University College London, London WC1E 6BT, UK
| | - Saikat Bhattacharjee
- Laboratory of Signal Transduction and Plant Resistance, Regional Centre for Biotechnology, NCR-Biotech Science Cluster, Faridabad 121001, Haryana, India
| | - Henning J Jessen
- Department of Chemistry and Pharmacy & CIBSS–The Center for Biological Signalling Studies, University of Freiburg, Freiburg 79104, Germany
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38
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Gihaz S, Gareiss P, Choi JY, Renard I, Pal AC, Surovsteva Y, Chiu JE, Thekkiniath J, Plummer M, Hungerford W, Montgomery ML, Hosford A, Adams EM, Lightfoot JD, Fox D, Ojo KK, Staker BL, Fuller K, Ben Mamoun C. High-resolution crystal structure and chemical screening reveal pantothenate kinase as a new target for antifungal development. Structure 2022; 30:1494-1507.e6. [PMID: 36167065 PMCID: PMC10042587 DOI: 10.1016/j.str.2022.09.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 07/28/2022] [Accepted: 09/01/2022] [Indexed: 01/22/2023]
Abstract
Fungal infections are the leading cause of mortality by eukaryotic pathogens, with an estimated 150 million severe life-threatening cases and 1.7 million deaths reported annually. The rapid emergence of multidrug-resistant fungal isolates highlights the urgent need for new drugs with new mechanisms of action. In fungi, pantothenate phosphorylation, catalyzed by PanK enzyme, is the first step in the utilization of pantothenic acid and coenzyme A biosynthesis. In all fungi sequenced so far, this enzyme is encoded by a single PanK gene. Here, we report the crystal structure of a fungal PanK alone as well as with high-affinity inhibitors from a single chemotype identified through a high-throughput chemical screen. Structural, biochemical, and functional analyses revealed mechanisms governing substrate and ligand binding, dimerization, and catalysis and helped identify new compounds that inhibit the growth of several Candida species. The data validate PanK as a promising target for antifungal drug development.
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Affiliation(s)
- Shalev Gihaz
- Section of Infectious Diseases, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Peter Gareiss
- Yale Center for Molecular Discovery, Yale West Campus, West Haven, CT 06516, USA
| | - Jae-Yeon Choi
- Section of Infectious Diseases, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Isaline Renard
- Section of Infectious Diseases, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Anasuya Chattopadhyay Pal
- Section of Infectious Diseases, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Yulia Surovsteva
- Yale Center for Molecular Discovery, Yale West Campus, West Haven, CT 06516, USA
| | - Joy E Chiu
- Section of Infectious Diseases, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Jose Thekkiniath
- Section of Infectious Diseases, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Mark Plummer
- Section of Infectious Diseases, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT 06520, USA
| | - William Hungerford
- Yale Center for Molecular Discovery, Yale West Campus, West Haven, CT 06516, USA
| | - Micaela L Montgomery
- Department of Microbiology and Immunology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
| | - Alanah Hosford
- Department of Microbiology and Immunology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA; Department of Ophthalmology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
| | - Emily M Adams
- Department of Microbiology and Immunology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA; Department of Ophthalmology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
| | - Jorge D Lightfoot
- Department of Microbiology and Immunology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA; Department of Ophthalmology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
| | - David Fox
- Seattle Structural Genomics Center for Infectious Disease (SSGCID), Seattle, WA 98109, USA; Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, WA 98109, USA; UCB Pharma, 7869 NE Day Road West, Bainbridge Island, WA 98110, USA
| | - Kayode K Ojo
- Center for Emerging & Re-emerging Infectious Disease, Division of Allergy & Infectious Disease, Department of Medicine, University of Washington, Seattle, WA 98109, USA
| | - Bart L Staker
- Seattle Structural Genomics Center for Infectious Disease (SSGCID), Seattle, WA 98109, USA; Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, WA 98109, USA
| | - Kevin Fuller
- Department of Microbiology and Immunology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA; Department of Ophthalmology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
| | - Choukri Ben Mamoun
- Section of Infectious Diseases, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT 06520, USA.
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Abstract
Studies aimed at supporting different treatment approaches for pantothenate kinase-associated neurodegeneration (PKAN) have revealed the complexity of coenzyme A (CoA) metabolism and the limits of our current knowledge about disease pathogenesis. Here we offer a foundation for critically evaluating the myriad approaches, argue for the importance of unbiased disease models, and highlight some of the outstanding questions that are central to our understanding and treating PKAN.
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Affiliation(s)
- Susan J Hayflick
- Departments of Molecular & Medical Genetics, Pediatrics, and Neurology, Oregon Health & Science University, Portland, OR 97239, USA.
| | - Suh Young Jeong
- Department of Molecular & Medical Genetics, Oregon Health & Science University, Portland, OR 97239, USA
| | - Ody C M Sibon
- Department of Biomedical Sciences of Cells and Systems, University Medical Center Groningen, University of Groningen, 9713 AV, the Netherlands
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Xie D, Hu G, Chen C, Ahmadinejad F, Wang W, Li PL, Gewirtz DA, Li N. Loss of sphingosine kinase 2 protects against cisplatin-induced kidney injury. Am J Physiol Renal Physiol 2022; 323:F322-F334. [PMID: 35834271 PMCID: PMC9394771 DOI: 10.1152/ajprenal.00229.2021] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 06/23/2022] [Accepted: 07/07/2022] [Indexed: 01/01/2023] Open
Abstract
Cisplatin is an established chemotherapeutic drug for treatment of solid-organ cancers and is the primary drug used in the treatment of head and neck cancer; however, cisplatin-induced nephrotoxicity largely limits its clinical use. Inhibition of sphingosine kinase 2 (SphK2) has been demonstrated to alleviate various kidney diseases. Therefore, we hypothesized that inhibition of SphK2 could also protect against cisplatin-induced nephrotoxicity. Results from the present study showed that the SphK2 inhibitor ABC294640 or knockdown of SphK2 by siRNA blocked the cisplatin-induced increase of cellular injury markers (neutrophil gelatinase-associated lipocalin, kidney injury molecule-1, and cleaved caspase-3) by Western blot analysis in HK-2 cells, a human renal tubular cell line. In addition, SphK2 inhibition blocked cisplatin-induced activation of NF-κB by Western blot analysis and immunostaining analysis. Furthermore, SphK2 inhibition suppressed cisplatin-induced increases of proinflammatory markers (NLR family pyrin domain containing 3, interleukin-1β, and interleukin-6). Genetic deletion of the SphK2 gene in mice further confirmed that inhibition of SphK2 protected against cisplatin-induced kidney damage in vivo. Compared with wild-type mice, SphK2 knockout mice exhibited less renal dysfunction and reduced promotion of kidney injury markers, inflammatory factors, tubular morphology damage, and fibrotic staining. At the same time, the SphK2 inhibitor ABC294640 failed to interfere with the activity of cisplatin or radiation in two cell culture models of head and neck cancer. It is concluded that inhibition of Sphk2 protects against cisplatin-induced kidney injury. SphK2 may be used as a potential therapeutic target for the prevention or treatment of cisplatin-induced kidney injury.NEW & NOTEWORTHY The present study provides new findings that sphingosine kinase 2 (SphK2) is highly expressed in renal tubules, cisplatin treatment increases the expression of SphK2 in proximal tubular cells and kidneys, and inhibition of SphK2 alleviates cisplatin-induced kidney injury by suppressing the activation of NF-κB, production of inflammatory factors, and apoptosis. SphK2 may serve as a potential therapeutic target for the prevention or treatment of cisplatin-induced nephrotoxicity.
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Affiliation(s)
- Dengpiao Xie
- Department of Pharmacology and Toxicology, Virginia Commonwealth University School of Medicine, Richmond, Virginia
- Department of Nephrology, Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Gaizun Hu
- Department of Pharmacology and Toxicology, Virginia Commonwealth University School of Medicine, Richmond, Virginia
| | - Chaoling Chen
- Department of Pharmacology and Toxicology, Virginia Commonwealth University School of Medicine, Richmond, Virginia
| | - Fereshteh Ahmadinejad
- Department of Pharmacology and Toxicology, Virginia Commonwealth University School of Medicine, Richmond, Virginia
| | - Weili Wang
- Department of Pharmacology and Toxicology, Virginia Commonwealth University School of Medicine, Richmond, Virginia
| | - Pin-Lan Li
- Department of Pharmacology and Toxicology, Virginia Commonwealth University School of Medicine, Richmond, Virginia
| | - David A Gewirtz
- Department of Pharmacology and Toxicology, Virginia Commonwealth University School of Medicine, Richmond, Virginia
| | - Ningjun Li
- Department of Pharmacology and Toxicology, Virginia Commonwealth University School of Medicine, Richmond, Virginia
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Li L, Wang D, Xin S, Ren X, Zhang J. Sphingosine Kinase 1 Acts as a Hypoxia-Upregulated Oncogene to Regulate Cell Invasion and Resistance to NK Cell Killing in Bladder Carcinoma Cells. Ann Clin Lab Sci 2022; 52:763-771. [PMID: 36261193] [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] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
OBJECTIVE Hypoxia facilitates an aggressive phenotype and immune evasion in solid tumors including bladder cancer (BC). Sphingosine kinase 1 (SphK1) is aberrantly expressed and correlated with poor prognosis in BC patients. However, its roles in hypoxia-evoked malignancies and immune evasion in BC remain elusive. METHODS The expression of SphK1 in BC tissues was analysed using a bioinformatics database. BC cells were transfected with si-SphK1 or recombinant HIF-1α plasmids under hypoxic conditions. The mRNA level, activity and protein expression of SphK1 were determined. Transwell assay was performed to evaluate cell invasion. After co-culture with natural killer (NK) cells, NK cell cytotoxicity to BC cells was assessed. The involvement of sphingosine-1-phosphate (S1P)/HIF-1α signaling was analysed by ELISA, qRT-PCR and western blot. RESULTS UALCAN and GEPIA database confirmed high expression of SphK1 in BC tissues. Moreover, hypoxia increased the expression and activity of SphK1. Loss of SphK1 inhibited hypoxia-induced cell invasion. IL-2 induced NK cell activation by secreting TNF-α and IFN-γ. Hypoxia antagonized NK cell activation-evoked cytotoxicity to BC cells. Intriguingly, SphK1 knockdown reversed hypoxia-induced cell resistance to NK cell killing. Mechanically, SphK1 loss inhibited hypoxia-activated the S1P/HIF-1α signaling. However, S1P addition reversed the inhibitory effects of SphK1 down-regulation on hypoxia-activated S1P/HIF-1α signaling. Notably, reactivating HIF-1α overturned the suppressive roles of SphK1 loss in decreasing hypoxia-induced cell invasion and resistance to NK cell cytotoxicity. CONCLUSIONS Targeting SphK1 may inhibit hypoxia-evoked invasion and immune evasion via the S1P/HIF-1α signaling, indicating a promising therapeutic target for BC.
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Affiliation(s)
- Liangliang Li
- Department of Urology, the First Affiliated Hospital of Henan University of Science and Technology, Luoyang, China
| | - Dandan Wang
- School of Basic Medical Sciences, Henan University of Science and Technology, Luoyang, China
| | - Shiyong Xin
- Department of Urology, the First Affiliated Hospital of Henan University of Science and Technology, Luoyang, China
| | - Xiaoqiang Ren
- Department of Urology, the First Affiliated Hospital of Henan University of Science and Technology, Luoyang, China
| | - Jianguo Zhang
- Department of Urology, the First Affiliated Hospital of Henan University of Science and Technology, Luoyang, China
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Arora S, Singh P, Tabassum G, Dohare R, Syed MA. miR-495-3p regulates sphingolipid metabolic reprogramming to induce Sphk1/ceramide mediated mitophagy and apoptosis in NSCLC. Free Radic Biol Med 2022; 189:71-84. [PMID: 35853537 DOI: 10.1016/j.freeradbiomed.2022.07.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 06/30/2022] [Accepted: 07/03/2022] [Indexed: 12/15/2022]
Abstract
Sphingolipid metabolism is the forefront area of cancer research, but the underlying mechanisms are not fully explored yet. Sphingolipid metabolites [ceramide, sphingosine-1-phosphate (S1P)] are critical players in cell growth and apoptosis. Sphk1 is a key enzyme, catalyzing the phosphorylation of sphingosine to S1P, favoring cell proliferation and survival. Contrarily, ceramide induces cell cycle arrest and apoptosis. Sphk1 also exerts regulatory roles in numerous cellular processes, wherein microRNAs (miRNAs) play a momentous role. However, miR-mediated regulation of Sphk1 in Non-small cell lung cancer (NSCLC), continues to be elusive. miR-495 is highly downregulated and worsens NSCLC prognosis. The present study demonstrates Sphk1 upregulation and poor prognosis in NSCLC. However, miR-495-3p directly targets Sphk1, and possesses tumor-suppressive roles by decreasing cell proliferation, wound healing, colony formation, LDH-A activity, and inducing G0/G1 phase cell cycle arrest upon restoration. Besides, we also found ceramide accretion upon Sphk1 inhibition, leading to mitochondrial dysregulation. We found a cogent upregulation of Drp-1, PARK2 and LC3β, along with degradation of PINK1 and Mfn2, demonstrating an imbalance in mitochondrial fission/fusion and induction of mitophagy, even during PINK1 deficiency. Later, we found a reduction in mitochondrial energy homeostasis, mitochondrial membrane potential, increased ROS generation and ultimately initiation of apoptosis, upon miR-495-3p overexpression. Overall, we showed that miR-495-3p reprograms sphingolipid rheostat towards ceramide by targeting Sphk1 and induces lethal mitophagy to suppress NSCLC tumorigenesis. The study identified a miR-mediated mechanism of sphingolipid reprogramming that could be beneficial in designing novel therapeutic strategies for NSCLC.
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Affiliation(s)
- Shweta Arora
- Translational Research Lab, Department of Biotechnology, Faculty of Natural Sciences, Jamia Millia Islamia, New Delhi, 110025, India.
| | - Prithvi Singh
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi, 110025, India.
| | - Gulnaz Tabassum
- Translational Research Lab, Department of Biotechnology, Faculty of Natural Sciences, Jamia Millia Islamia, New Delhi, 110025, India.
| | - Ravins Dohare
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi, 110025, India.
| | - Mansoor Ali Syed
- Translational Research Lab, Department of Biotechnology, Faculty of Natural Sciences, Jamia Millia Islamia, New Delhi, 110025, India.
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Zong G, Shears SB, Wang H. Structural and catalytic analyses of the InsP 6 kinase activities of higher plant ITPKs. FASEB J 2022; 36:e22380. [PMID: 35635723 PMCID: PMC9202514 DOI: 10.1096/fj.202200393r] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 05/04/2022] [Accepted: 05/16/2022] [Indexed: 09/21/2023]
Abstract
Inositol phosphate signaling in plants is of substantial agricultural interest, with a considerable focus on the inositol tris/tetrakisphosphate kinase (ITPK) family of inositol phosphate kinases. Historically, the 4-6 isoforms of ITPKs that higher plants each express have been studied for their multiplexing a metabolic pathway to synthesize inositol hexakisphosphate (ie InsP6 or phytate), through the phosphorylation and dephosphorylation of multiple inositol phosphates, including Ins(1,3,4,5,6)P5 (inositol-1,3,4,5,6-pentakisphosphate). A more recent discovery is ITPK-catalyzed phosphorylation of InsP6 to inositol pyrophosphates, which regulate plant immunity and phosphate homeostasis. However, a molecular-based explanation for these alternate catalytic activities has been missing, because no plant ITPK structure has previously been solved. Herein, we provide biochemical and structural analyses of ITPKs from Zea mays and Glycine max. For this work we introduce a simple, enzyme-coupled microplate-based assay of InsP6 kinase activity that should promote more general access to this important field. Furthermore, a ZmITPK1/InsP6 crystal complex is described at a resolution of 2.6 Å, which identifies a number of catalytically important residues; their functionality is confirmed by mutagenesis. We further demonstrate that ZmITPK1 adds a β-phosphate to the 3-position of Ins(1,2,3,4,5)P5 , yielding a candidate signal for regulating phosphate homeostasis. An impactful discovery is our description of a 29-residue catalytic specificity element; by interchanging this element between GmITPK1 and GmITPK2, we demonstrate how its isoform-specific sequence specifically determines whether the host protein phosphorylates InsP6 , without substantially affecting Ins(1,3,4,5,6)P5 metabolism. Our structural rationalization of key catalytic differences between alternate ITPK isoforms will complement future research into their functional diversity.
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Affiliation(s)
- Guangning Zong
- Inositol Signaling Section, Signal Transduction Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC 27709 USA
| | - Stephen B. Shears
- Inositol Signaling Section, Signal Transduction Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC 27709 USA
| | - Huanchen Wang
- Inositol Signaling Section, Signal Transduction Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC 27709 USA
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Huang S, Xiang C, Song Y. Identification of the shared gene signatures and pathways between sarcopenia and type 2 diabetes mellitus. PLoS One 2022; 17:e0265221. [PMID: 35271662 PMCID: PMC8912249 DOI: 10.1371/journal.pone.0265221] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Accepted: 02/25/2022] [Indexed: 12/14/2022] Open
Abstract
Background Sarcopenia is characterized by the age-associated loss of skeletal muscle mass and strength that develops progressively and plays an important role in the disability of the elderly. It has received growing attention over the last decade and has been implicated as both a cause and consequence of type 2 diabetes mellitus (T2DM). The existence of T2DM could increase the risk of developing sarcopenia through multiple mechanisms including advanced glycation end-product accumulation. Meanwhile, sarcopenia would alter glucose disposal and may contribute to the development and progression of T2DM due to reduced muscle mass. Methods We implemented transcriptomic analysis of skeletal muscle biopsy specimens in sarcopenia patients and proliferating myoblasts or differentiated myotubes from individuals with T2DM. Related microarray data were selected from Gene Expression Omnibus (GEO) to screen the genes, which were differentially expressed for sarcopenia and T2DM. Multiple combinatorial statistical methods and bioinformatics tools were used to analyze the common DEGs. Meanwhile, functional enrichment analysis was also carried out. Furthermore, we constructed the protein-protein interaction (PPI), as well as transcription factor (TF)-gene interactions network and TF-miRNA coregulatory network. Finally, based on the common DEGs, drug compounds were speculated using the Drug Signatures database (DSigDB). Results A total of 1765 and 2155 DEGs of sarcopenia and T2DM were screened, respectively. 15 common genes (LXN, CIB2, PEA15, KANK2, FGD1, NMRK1, PLCB1, SEMA4G, ADARB1, UPF3A, CSTB, COL3A1, CD99, ETV3, FJX1) correlated with sarcopenia and T2DM simultaneously were then identified, and 3 genes (UPF3A, CSTB and PEA15) of them were regarded as hub genes. Functional enrichment analysis revealed several shared pathways between two diseases. In addition, according to the TF-gene interactions network and TF-miRNA coregulatory network, part of TF and miRNA may be identified as key regulator in sarcopenia and T2DM at the same time (e.g., CREM and miR-155). Notably, drug compounds for T2DM and sarcopenia were also suggested, such as coenzyme Q10. Conclusion This study revealed that sarcopenia and T2DM may share similar pathogenesis and provided new biological targets and ideas for early diagnosis and effective treatment of sarcopenia and T2DM.
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Affiliation(s)
- Shiyuan Huang
- Department of Geriatrics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Chunhua Xiang
- Department of Geriatrics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yi Song
- Department of Geriatrics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- * E-mail:
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Tanaka A, Anada K, Yasue M, Honda T, Nakamura H, Murayama T. Ceramide kinase knockout ameliorates multiple sclerosis-like behaviors and demyelination in cuprizone-treated mice. Life Sci 2022; 296:120446. [PMID: 35245521 DOI: 10.1016/j.lfs.2022.120446] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 02/11/2022] [Accepted: 02/26/2022] [Indexed: 12/18/2022]
Abstract
Changes in sphingolipid metabolism regulate and/or alter many cellular functions in the brain. Ceramide, a central molecule of sphingolipid metabolism, is phosphorylated to ceramide-1-phosphate (C1P) by ceramide kinase (CerK). CerK and C1P were reported to regulate many cellular responses, but their roles in immune-related diseases in vivo have not been well elucidated. Thus, we investigated the effects of CerK knockout on the onset/progression of multiple sclerosis (MS), which is a chronic neurodegenerative disease accompanied by the loss of myelin sheaths in the brain. MS-model mice were prepared using a diet containing the copper chelator cuprizone (CPZ). Treatment of 8-week-old mice with 0.2% CPZ for 8 weeks resulted in motor dysfunction based on the Rota-rod test, and caused the loss of myelin-related proteins (MRPs) in the brain and demyelination in the corpus callosum without affecting synaptophysin levels. CerK knockout, which did not affect developmental changes in MRPs, ameliorated the motor dysfunction, loss of MRPs, and demyelination in the brain in CPZ-treated mice. Loss of tail tonus, another marker of motor dysfunction, was detected at 1 week without demyelination after CPZ treatment in a CerK knockout-independent manner. CPZ-induced loss of tail tonus progressed, specifically in female mice, to 6-8 weeks, and the loss was ameliorated by CerK knockout. Activities of ceramide metabolic enzymes including CerK in the lysates of the brain were not affected by CPZ treatment. Inhibition of CerK as a candidate for MS treatment was discussed.
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Affiliation(s)
- Ai Tanaka
- Laboratory of Chemical Pharmacology, Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Kohei Anada
- Laboratory of Chemical Pharmacology, Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Masataka Yasue
- Laboratory of Chemical Pharmacology, Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Takuya Honda
- Laboratory of Chemical Pharmacology, Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Hiroyuki Nakamura
- Laboratory of Chemical Pharmacology, Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan.
| | - Toshihiko Murayama
- Laboratory of Chemical Pharmacology, Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan
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Brito T, Banganho D, Pedrosa C, Farela Neves J. Homozygous V377I mutation causing mevalonate kinase. BMJ Case Rep 2022; 15:e249135. [PMID: 35387795 PMCID: PMC8987701 DOI: 10.1136/bcr-2022-249135] [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] [Accepted: 03/24/2022] [Indexed: 06/14/2023] Open
Abstract
Hyperimmunoglobulinaemia D syndrome (HIDS) is a rare autosomal recessive disorder caused by mutations in the mevalonate kinase (MVK) gene, located on chromosome 12. The most common mutation identified in MVK gene so far is V377I. Compound heterozygotes that include this variant may exhibit a more severe phenotype of the disease and homozygotes are rarely found in clinical practice probably they express a milder phenotype. HIDS is a chronic autoinflammatory disease characterised by recurrent febrile episodes, associated with lymphadenopathies, abdominal pain, rash and arthritis. These flares can be triggered by vaccination, minor trauma, surgery and stress.We report a case of a 2-year-old girl who had recurrent attacks of fever associated with cervical lymphadenopathy, macular erythematous skin rash, abdominal pain and aphthous ulcers in the mouth. The patient was found to excrete elevated amounts of urinary mevalonic acid and a homozygous V337I mutation in the MVK gene was identified.
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Affiliation(s)
- Teresa Brito
- Pediatrics Department, Hospital de São Bernardo, Centro Hospitalar de Setúbal, EPE, Setubal, Portugal
| | - Denise Banganho
- Pediatrics Department, Hospital de São Bernardo, Centro Hospitalar de Setúbal, EPE, Setubal, Portugal
| | - Cristina Pedrosa
- Pediatrics Department, Hospital de São Bernardo, Centro Hospitalar de Setúbal, EPE, Setubal, Portugal
| | - João Farela Neves
- Primary Immunodeficiencies Unit, Hospital Dona Estefânia, Centro Hospitalar Universitário de Lisboa Central, EPE, Setubal, Portugal
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Maus KD, Stephenson DJ, Ali AN, MacKnight HP, Huang HJ, Serrats J, Kim M, Diegelmann RF, Chalfant CE. Ceramide kinase regulates acute wound healing by suppressing 5-oxo-ETE biosynthesis and signaling via its receptor OXER1. J Lipid Res 2022; 63:100187. [PMID: 35219746 PMCID: PMC8980959 DOI: 10.1016/j.jlr.2022.100187] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 02/18/2022] [Accepted: 02/21/2022] [Indexed: 01/10/2023] Open
Abstract
The sphingolipid, ceramide-1-phosphate (C1P), has been shown to promote the inflammatory phase and inhibit the proliferation and remodeling stages of wound repair via direct interaction with group IVA cytosolic phospholipase A2, a regulator of eicosanoid biosynthesis that fine-tunes the behaviors of various cell types during wound healing. However, the anabolic enzyme responsible for the production of C1P that suppresses wound healing as well as bioactive eicosanoids and target receptors that drive enhanced wound remodeling have not been characterized. Herein, we determined that decreasing C1P activity via inhibitors or genetic ablation of the anabolic enzyme ceramide kinase (CERK) significantly enhanced wound healing phenotypes. Importantly, postwounding inhibition of CERK enhanced the closure rate of acute wounds, improved the quality of healing, and increased fibroblast migration via a "class switch" in the eicosanoid profile. This switch reduced pro-inflammatory prostaglandins (e.g., prostaglandin E2) and increased levels of 5-hydroxyeicosatetraenoic acid and the downstream metabolite 5-oxo-eicosatetraenoic acid (5-oxo-ETE). Moreover, dermal fibroblasts from mice with genetically ablated CERK showed enhanced wound healing markers, while blockage of the murine 5-oxo-ETE receptor (oxoeicosanoid receptor 1) inhibited the enhanced migration phenotype of these cell models. Together, these studies reinforce the vital roles eicosanoids play in the wound healing process and demonstrate a novel role for CERK-derived C1P as a negative regulator of 5-oxo-ETE biosynthesis and the activation of oxoeicosanoid receptor 1 in wound healing. These findings provide foundational preclinical results for the use of CERK inhibitors to shift the balance from inflammation to resolution and increase the wound healing rate.
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Affiliation(s)
- Kenneth D Maus
- Department of Cell Biology, Microbiology, and Molecular Biology, University of South Florida, Tampa, FL, USA
| | - Daniel J Stephenson
- Department of Cell Biology, Microbiology, and Molecular Biology, University of South Florida, Tampa, FL, USA
| | - Anika N Ali
- Department of Cell Biology, Microbiology, and Molecular Biology, University of South Florida, Tampa, FL, USA
| | - Henry Patrick MacKnight
- Department of Cell Biology, Microbiology, and Molecular Biology, University of South Florida, Tampa, FL, USA
| | - Huey-Jing Huang
- Neuroscience Drug Discovery Unit, Takeda California, San Diego, CA, USA
| | - Jordi Serrats
- Neuroscience Drug Discovery Unit, Takeda California, San Diego, CA, USA
| | - Minjung Kim
- Department of Cell Biology, Microbiology, and Molecular Biology, University of South Florida, Tampa, FL, USA
| | - Robert F Diegelmann
- Department of Biochemistry and Molecular Biology, Virginia Commonwealth University-School of Medicine, Richmond, VA, USA
| | - Charles E Chalfant
- Department of Cell Biology, Microbiology, and Molecular Biology, University of South Florida, Tampa, FL, USA; Cancer Biology and Evolution Program, The Moffitt Cancer Center, Tampa, FL, USA; Research Service, James A. Haley Veterans Hospital, Tampa, FL, USA; Division of Hematology & Oncology, Department of Medicine, University of Virginia, Charlottesville, VA, USA; Department of Cell Biology, University of Virginia, Charlottesville, VA, USA; Program in Cancer Biology, University of Virginia Cancer Center, Charlottesville, VA, USA; Research Service, Hunter Holmes McGuire Veterans Administration Medical Center, Richmond, VA, USA.
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Techarang T, Jariyapong P, Punsawad C. Role of sphingosine kinase and sphingosine-1-phosphate receptor in the liver pathology of mice infected with Plasmodium berghei ANKA. PLoS One 2022; 17:e0266055. [PMID: 35333897 PMCID: PMC8956183 DOI: 10.1371/journal.pone.0266055] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Accepted: 03/14/2022] [Indexed: 11/19/2022] Open
Abstract
Decreased serum sphingosine 1-phosphate (S1P) has been reported in severe malaria patients, but the expression of receptors and enzymes associated with S1P has not been investigated in the liver of malaria patients. Therefore, this study aimed to investigate the expression of sphingosine kinase (SphK) and S1P receptors (S1PRs) in the liver of malaria-infected mice. C57BL/6 male mice were divided into a control group (n = 10) and a Plasmodium berghei (PbA)-infected group (n = 10). Mice in the malaria group were intraperitoneally injected with 1×106P. berghei ANKA-infected red blood cells, whereas control mice were intraperitoneally injected with normal saline. Liver tissues were collected on Day 13 of the experiment to evaluate histopathological changes by hematoxylin and eosin staining and to investigate SphK and S1PR expression by immunohistochemistry and real-time PCR. Histological examination of liver tissues from the PbA-infected group revealed sinusoidal dilatation, hemozoin deposition, portal tract inflammation and apoptotic hepatocytes, which were absent in the control group. Immunohistochemical staining showed significant increases in the expression of SphK1 and SphK2 and significant decreases in the expression of S1PR1, S1PR2, and S1PR3 in the endothelium, hepatocytes, and Kupffer cells in liver tissue from the PbA-infected group compared with the control group. Real-time PCR analysis showed the upregulation of SphK1 and the downregulation of S1PR1, S1PR2, and S1PR3 in the liver in the PbA-infected group compared with the control group. In conclusion, this study demonstrates for the first time that SphK1 mRNA expression is upregulated and that S1PR1, S1PR2, and S1PR3 expression is decreased in the liver tissue of PbA-infected mice. Our findings suggest that the decreased levels of S1PR1, S1PR2, and S1PR3 might play an important role in liver injury during malaria infection.
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Affiliation(s)
- Tachpon Techarang
- Department of Medical Science, School of Medicine, Walailak University, Nakhon Si Thammarat, Thailand
| | - Pitchanee Jariyapong
- Department of Medical Science, School of Medicine, Walailak University, Nakhon Si Thammarat, Thailand
| | - Chuchard Punsawad
- Department of Medical Science, School of Medicine, Walailak University, Nakhon Si Thammarat, Thailand
- Research Center in Tropical Pathobiology, Walailak University, Nakhon Si Thammarat, Thailand
- * E-mail:
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Yuan J, Zhanga C, Qiao S, Wang A, Zhang S. Novel Compound Heterozygous Mutation in PANK2 in a Patient with an Atypical Form of Pantothenate Kinase Associated Neurodegeneration and His Family. Neurol India 2022; 70:737-739. [PMID: 35532650 DOI: 10.4103/0028-3886.344682] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Pantothenate kinase-associated neurodegeneration (PKAN) is an autosomal-recessive disease characterized by iron accumulation in the brain due to PANK2 gene mutation. The typical "eye-of-the-tiger" sign is the characteristic manifestation of brain magnetic resonance imaging (MRI). We report a Chinese patient with atypical PKAN whose brain MRI scans displayed the typical "eye-of-the-tiger" sign in bilateral pallidum. Genetic analysis identified a compound heterozygous mutation (c. 629-2A > T, c. 1130T > C) for the PANK2 gene. These two mutations were further demonstrated in his parents and other relatives.
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Affiliation(s)
- Jing Yuan
- Department of Neurology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Jinan, China
| | - Canling Zhanga
- Nursing Department, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Jinan, China
| | - Shan Qiao
- Department of Neurology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Jinan, China
| | - Aihua Wang
- Department of Neurology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Jinan, China
| | - Shanchao Zhang
- Department of Neurology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Jinan, China
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Younis NS, Mohamed ME, Alolayan AA, Alhussain GY, Al-Mousa HA, Alshamrani JA, AlMutayib MM, AlQahtani MM, Alhaddad ZA, Alfarhan ZS, AlOmran ZA, Almostafa MM. Identification of epilepsy concomitant candidate genes recognized in Saudi epileptic patients. Eur Rev Med Pharmacol Sci 2022; 26:2143-2157. [PMID: 35363364 DOI: 10.26355/eurrev_202203_28362] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Saudi Genome program is a revolutionary nationwide transformation initiative of Saudi Vision 2030. The program goals are to recognize and reduce the incidence of genetic diseases in the Kingdom of Saudi Arabia (KSA). Accordingly, the program will establish the foundation for personalized and genomic medicine in the KSA. Epilepsy has a high prevalence in KSA reaching around 6.54 of 1000 individuals with a subsequent massive financial burden. One of the main risk factors for this high prevalence and associated with increased risk of epilepsy development is consanguinity marriage, which is traditional in KSA. In this review, we executed a comprehensive state-of-art literature review regarding epilepsy genetics to offer a perception into the genes associated with epilepsy recognized in Saudi epileptic patients. Several genes' mutations were incorporated in this review including AFG3L2, ASPM, ATN1, ATP1A2, BMP5, CCDC88A, C12orf57, DNAJA1, EML1, ERLIN2, FRRS1L, GABRG3, NRXN3, MDH1, KCNJ10, KCNMA1, KCNT1, KIAA0226, OPHN1, PCCA, PCCB, PEX, PGAP2, PI4K2A, PODXL, PRICKLE1, PNKP, RELN, SCN2A, SCN1B, SLC2A1, SLC19A3, SLC25, SIAH1, SYNJ1, SZT2, TBCK, TMX2, TSC1, TSC2, TSEN, WDR45B, WWOX, UBR, UGDH, and YIF1B. For each of these genes, we tried to explain a little about the gene associated proteins and their roles in epilepsy development.
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Affiliation(s)
- N S Younis
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa, Saudi Arabia.
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