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Shi K, Xiao Y, Qu M, Xie Y, Wang Y, Ke C, Qu L, Liu Y. Atractylodin modulates ASAH3L to improve galactose metabolism and inflammation to alleviate acute lung injury. iScience 2024; 27:110751. [PMID: 39351199 PMCID: PMC11440247 DOI: 10.1016/j.isci.2024.110751] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2024] [Revised: 05/30/2024] [Accepted: 08/13/2024] [Indexed: 10/04/2024] Open
Abstract
Acute lung injury (ALI) is a lung disease characterized by an excessive inflammatory response and damage to lung epithelial cells. Atractylodin (ATL) has good anti-inflammatory activity and protects the integrity of the epithelial cell barrier. However, the efficacy of ATL in the treatment of ALI and its mechanism is unclear. We investigated the efficacy of ATL in treating ALI and explored its targets and mechanisms. The results showed that ATL significantly reduced the wet-dry ratio of lungs of rats with ALI, improved the pathological changes, and lowered the expression of the inflammatory factors. Combined metabolomic and transcriptomic analyses showed that ATL can reduce inflammation by inhibiting and activating the HIF-1 signaling pathway and modulating ASAH3L to improve galactose metabolism, thereby alleviating ALI. In conclusion, ATL may be a potential drug for the treatment of acute lung injury.
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Affiliation(s)
- Kun Shi
- College of Pharmacy, Hubei University of Chinese Medicine, Wuhan 430065, China
- Center for Hubei TCM Processing Technology Engineering, Wuhan 430065, China
- Hubei Shizhen Laboratory, Wuhan 430065, China
| | - Yangxin Xiao
- College of Pharmacy, Hubei University of Chinese Medicine, Wuhan 430065, China
- Center for Hubei TCM Processing Technology Engineering, Wuhan 430065, China
- Hubei Shizhen Laboratory, Wuhan 430065, China
| | - Mumujiang Qu
- College of Pharmacy, Hubei University of Chinese Medicine, Wuhan 430065, China
| | - Ying Xie
- College of Pharmacy, Hubei University of Chinese Medicine, Wuhan 430065, China
| | - Yan Wang
- College of Pharmacy, Hubei University of Chinese Medicine, Wuhan 430065, China
| | - Chang Ke
- College of Pharmacy, Hubei University of Chinese Medicine, Wuhan 430065, China
| | - Linghang Qu
- College of Pharmacy, Hubei University of Chinese Medicine, Wuhan 430065, China
- Center for Hubei TCM Processing Technology Engineering, Wuhan 430065, China
- Hubei Shizhen Laboratory, Wuhan 430065, China
| | - Yanju Liu
- College of Pharmacy, Hubei University of Chinese Medicine, Wuhan 430065, China
- Center for Hubei TCM Processing Technology Engineering, Wuhan 430065, China
- Hubei Shizhen Laboratory, Wuhan 430065, China
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2
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An SY, Yoon HK, Kim KS, Kim HD, Cho JH, Kim HJ, Kim CH, Lee YC. Upregulation of human GD3 synthase (hST8Sia I) gene expression during serum starvation-induced osteoblastic differentiation of MG-63 cells. PLoS One 2023; 18:e0293321. [PMID: 37917776 PMCID: PMC10621931 DOI: 10.1371/journal.pone.0293321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Accepted: 10/09/2023] [Indexed: 11/04/2023] Open
Abstract
In this study, we have firstly elucidated that serum starvation augmented the levels of human GD3 synthase (hST8Sia I) gene and ganglioside GD3 expression as well as bone morphogenic protein-2 and osteocalcin expression during MG-63 cell differentiation using RT-PCR, qPCR, Western blot and immunofluorescence microscopy. To evaluate upregulation of hST8Sia I gene during MG-63 cell differentiation by serum starvation, promoter area of the hST8Sia I gene was functionally analyzed. Promoter analysis using luciferase reporter assay system harboring various constructs of the hST8Sia I gene proved that the cis-acting region at -1146/-646, which includes binding sites of the known transcription factors AP-1, CREB, c-Ets-1 and NF-κB, displays the highest level of promoter activity in response to serum starvation in MG-63 cells. The -731/-722 region, which contains the NF-κB binding site, was proved to be essential for expression of the hST8Sia I gene by serum starvation in MG-63 cells by site-directed mutagenesis, NF-κB inhibition, and chromatin immunoprecipitation (ChIP) assay. Knockdown of hST8Sia I using shRNA suggested that expressions of hST8Sia I and GD3 have no apparent effect on differentiation of MG-63 cells. Moreover, the transcriptional activation of hST8Sia I gene by serum starvation was strongly hindered by SB203580, a p38MAPK inhibitor in MG-63 cells. From these results, it has been suggested that transcription activity of hST8Sia I gene by serum starvation in human osteosarcoma MG-63 cells is regulated by p38MAPK/NF-κB signaling pathway.
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Affiliation(s)
- So-Young An
- Department of Medicinal Biotechnology, College of Health Sciences, Dong-A University, Busan, South Korea
| | - Hyun-Kyoung Yoon
- Department of Medicinal Biotechnology, College of Health Sciences, Dong-A University, Busan, South Korea
| | - Kyoung-Sook Kim
- Department of Medicinal Biotechnology, College of Health Sciences, Dong-A University, Busan, South Korea
| | - Hee-Do Kim
- Molecular and Cellular Glycobiology Unit, Department of Biological Sciences, SungKyunKwan University, Kyunggi-Do, South Korea
| | - Jong-Hyun Cho
- Department of Medicinal Biotechnology, College of Health Sciences, Dong-A University, Busan, South Korea
| | - Hyeon-Jun Kim
- Department of Orthopaedic Surgery, College of Medicine, Dong-A University, Busan, South Korea
| | - Cheorl-Ho Kim
- Molecular and Cellular Glycobiology Unit, Department of Biological Sciences, SungKyunKwan University, Kyunggi-Do, South Korea
| | - Young-Choon Lee
- Department of Medicinal Biotechnology, College of Health Sciences, Dong-A University, Busan, South Korea
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Lipidomic Analysis of Hand Skin Surface Lipids Reveals Smoking-Related Skin Changes. Metabolites 2023; 13:metabo13020254. [PMID: 36837873 PMCID: PMC9963340 DOI: 10.3390/metabo13020254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 02/04/2023] [Accepted: 02/06/2023] [Indexed: 02/12/2023] Open
Abstract
Smoking contributes to the formation of skin wrinkles and reduces skin function, but the mechanism is not yet fully proven. This study aims to compare and analyze the effects of smoking on skin lipids and to further investigate the harmful effects of smoking on the skin. A total of 40 subjects (20 male smokers and 20 healthy control males) were recruited for this study. Measurement of hand skin-surface lipids (SSLs) in smoking and healthy control groups was undertaken using ultra-performance liquid chromatography quadrupole time-of-flight mass spectrometry (UPLC-Q-TOF-MS). Multivariate data analysis was used to investigate the differences in SSLs between the two groups. There were 1230 lipids detected in the two groups and significant differences in SSLs' composition were observed between them. Under selected conditions, 26 types of lipid with significant differences were observed between the two groups (p < 0.05). Sphingolipids (SP) and glycerolipids (GL) were significantly increased, and sterol lipids (ST) were significantly reduced. Smoking causes changes in skin lipids that disrupt skin homeostasis, making the skin more fragile and more susceptible to skin aging and diseases.
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Avraham R, Melamed S, Achdout H, Erez N, Israeli O, Barlev-Gross M, Pasmanik-Chor M, Paran N, Israely T, Vitner EB. Antiviral activity of glucosylceramide synthase inhibitors in alphavirus infection of the central nervous system. Brain Commun 2023; 5:fcad086. [PMID: 37168733 PMCID: PMC10165247 DOI: 10.1093/braincomms/fcad086] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 12/23/2022] [Accepted: 03/23/2023] [Indexed: 05/13/2023] Open
Abstract
Virus-induced CNS diseases impose a considerable human health burden worldwide. For many viral CNS infections, neither antiviral drugs nor vaccines are available. In this study, we examined whether the synthesis of glycosphingolipids, major membrane lipid constituents, could be used to establish an antiviral therapeutic target. We found that neuroinvasive Sindbis virus altered the sphingolipid levels early after infection in vitro and increased the levels of gangliosides GA1 and GM1 in the sera of infected mice. The alteration in the sphingolipid levels appears to play a role in neuroinvasive Sindbis virus replication, as treating infected cells with UDP-glucose ceramide glucosyltransferase (UGCG) inhibitors reduced the replication rate. Moreover, the UGCG inhibitor GZ-161 increased the survival rates of Sindbis-infected mice, most likely by reducing the detrimental immune response activated by sphingolipids in the brains of Sindbis virus-infected mice. These findings suggest a role for glycosphingolipids in the host immune response against neuroinvasive Sindbis virus and suggest that UGCG inhibitors should be further examined as antiviral therapeutics for viral infections of the CNS.
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Affiliation(s)
- Roy Avraham
- Department of Infectious Diseases, Israel Institute for Biological Research, 7410001 Ness-Ziona, Israel
| | - Sharon Melamed
- Department of Infectious Diseases, Israel Institute for Biological Research, 7410001 Ness-Ziona, Israel
| | - Hagit Achdout
- Department of Infectious Diseases, Israel Institute for Biological Research, 7410001 Ness-Ziona, Israel
| | - Noam Erez
- Department of Infectious Diseases, Israel Institute for Biological Research, 7410001 Ness-Ziona, Israel
| | - Ofir Israeli
- Department of Biochemistry and Molecular Genetics, Israel Institute for Biological Research, 7410001 Ness-Ziona, Israel
| | - Moria Barlev-Gross
- Department of Infectious Diseases, Israel Institute for Biological Research, 7410001 Ness-Ziona, Israel
| | - Metsada Pasmanik-Chor
- Bioinformatics Unit, George S. Wise Faculty of Life Science, Tel Aviv University, 6997801 Tel Aviv, Israel
| | - Nir Paran
- Department of Infectious Diseases, Israel Institute for Biological Research, 7410001 Ness-Ziona, Israel
| | - Tomer Israely
- Department of Infectious Diseases, Israel Institute for Biological Research, 7410001 Ness-Ziona, Israel
| | - Einat B Vitner
- Correspondence to: Einat B. Vitner Department of Infectious Diseases Israel Institute for Biological Research P.O.B 19, 7410001 Ness-Ziona, Israel E-mail:
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Kasprowicz A, Sophie GD, Lagadec C, Delannoy P. Role of GD3 Synthase ST8Sia I in Cancers. Cancers (Basel) 2022; 14:cancers14051299. [PMID: 35267607 PMCID: PMC8909605 DOI: 10.3390/cancers14051299] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 02/27/2022] [Accepted: 02/28/2022] [Indexed: 12/31/2022] Open
Abstract
Simple Summary The carbohydrate moiety of cell surface glycolipids is modified in cancers of neuro–ectoderm origin, leading to the expression of more complex structures with two or more sialic acid residues. These alterations result from the upregulation of the ST8SIA1 gene that encodes GD3 synthase, the enzyme controlling the biosynthesis of complex gangliosides, and are usually associated with a more aggressive phenotype and a poor outcome for patients, making GD3 synthase an interesting target for cancer therapy. This review reports our general knowledge of GD3 synthase gene expression and regulation, its role in both epithelial–mesenchymal transition (EMT) and cancer progression, and the different approaches targeting GD3S expression in cancers. Abstract GD3 synthase controls the biosynthesis of complex gangliosides, bearing two or more sialic acid residues. Disialylated gangliosides GD3 and GD2 are tumor-associated carbohydrate antigens (TACA) in neuro–ectoderm-derived cancers, and are directly involved in cell malignant properties, i.e., migration, invasion, stemness, and epithelial–mesenchymal transition. Since GD3 and GD2 levels are directly linked to GD3 synthase expression and activity, targeting GD3 synthase appears to be a promising strategy through which to interfere with ganglioside-associated malignant properties. We review here the current knowledge on GD3 synthase expression and regulation in cancers, and the consequences of complex ganglioside expression on cancer cell signaling and properties, highlighting the relationships between GD3 synthase expression and epithelial–mesenchymal transition and stemness. Different strategies were used to modulate GD3 synthase expression in cancer cells in vitro and in animal models, such as inhibitors or siRNA/lncRNA, which efficiently reduced cancer cell malignant properties and the proportion of GD2 positive cancer stem cells, which are associated with high metastatic properties, resistance to therapy, and cancer relapse. These data show the relevance of targeting GD3 synthase in association with conventional therapies, to decrease the number of cancer stem cells in tumors.
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Affiliation(s)
- Angelina Kasprowicz
- University of Lille, CNRS, UMR 8576-UGSF-Unité de Glycosylation Structurale et Fonctionnelle, F-59000 Lille, France;
| | - Groux-Degroote Sophie
- University of Lille, CNRS, UMR 8576-UGSF-Unité de Glycosylation Structurale et Fonctionnelle, F-59000 Lille, France;
- Correspondence: (G.-D.S.); (P.D.)
| | - Chann Lagadec
- University of Lille, CNRS, Inserm, CHU Lille UMR9020-U1277-CANTHER Cancer Heterogeneity, Plasticity and Resistance to Therapies, F-59000 Lille, France;
| | - Philippe Delannoy
- University of Lille, CNRS, UMR 8576-UGSF-Unité de Glycosylation Structurale et Fonctionnelle, F-59000 Lille, France;
- Correspondence: (G.-D.S.); (P.D.)
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Araki E, Hane M, Hatanaka R, Kimura R, Tsuda K, Konishi M, Komura N, Ando H, Kitajima K, Sato C. Analysis of biochemical features of ST8 α-N-acetyl-neuraminide α2,8-sialyltransferase (St8sia) 5 isoforms. Glycoconj J 2022; 39:291-302. [PMID: 34982351 DOI: 10.1007/s10719-021-10034-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Revised: 11/24/2021] [Accepted: 12/08/2021] [Indexed: 12/11/2022]
Abstract
Gangliosides are important components of the membrane and are involved in many biological activities. St8sia5 is an α2,8-sialyltransferase involved in ganglioside synthesis, and has three isoforms. In this study, we analyzed the features of three isoforms, St8sia5-S, -M, and -L that had not been analyzed, and found that only St8sia5-L was localized in the Golgi, while the majority of St8sia5-M and -S were localized in the ER. The localization of Golgi of St8sia5 depended on the stem region. In addition, the incorporation of exogenous GD3 was upregulated only in St8sia5-L expressing cells. Taken together, the localization of St8sia5 is important for the activity of the enzyme.
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Affiliation(s)
- Erino Araki
- Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Nagoya, 464-8601, Japan
- Bioscience and Biotechnology Center, Nagoya University, Chikusa, Nagoya, 464-8601, Japan
| | - Masaya Hane
- Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Nagoya, 464-8601, Japan
- Bioscience and Biotechnology Center, Nagoya University, Chikusa, Nagoya, 464-8601, Japan
- Glyco-BioMedical Research Center (iGMED), Institute for Glyco-core Research (iGCORE), Nagoya University, Chikusa, Nagoya, 464-8601, Japan
| | - Rina Hatanaka
- Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Nagoya, 464-8601, Japan
- Bioscience and Biotechnology Center, Nagoya University, Chikusa, Nagoya, 464-8601, Japan
| | - Ryota Kimura
- Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Nagoya, 464-8601, Japan
- Bioscience and Biotechnology Center, Nagoya University, Chikusa, Nagoya, 464-8601, Japan
| | - Kana Tsuda
- Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Nagoya, 464-8601, Japan
- Bioscience and Biotechnology Center, Nagoya University, Chikusa, Nagoya, 464-8601, Japan
| | - Miku Konishi
- Institute for Glyco-Core Research (iGCORE), Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan
| | - Naoko Komura
- Institute for Glyco-Core Research (iGCORE), Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan
| | - Hiromune Ando
- Institute for Glyco-Core Research (iGCORE), Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan
| | - Ken Kitajima
- Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Nagoya, 464-8601, Japan
- Bioscience and Biotechnology Center, Nagoya University, Chikusa, Nagoya, 464-8601, Japan
- Glyco-BioMedical Research Center (iGMED), Institute for Glyco-core Research (iGCORE), Nagoya University, Chikusa, Nagoya, 464-8601, Japan
| | - Chihiro Sato
- Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Nagoya, 464-8601, Japan.
- Bioscience and Biotechnology Center, Nagoya University, Chikusa, Nagoya, 464-8601, Japan.
- Glyco-BioMedical Research Center (iGMED), Institute for Glyco-core Research (iGCORE), Nagoya University, Chikusa, Nagoya, 464-8601, Japan.
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Husson H, Bukanov NO, Moreno S, Smith MM, Richards B, Zhu C, Picariello T, Park H, Wang B, Natoli TA, Smith LA, Zanotti S, Russo RJ, Madden SL, Klinger KW, Modur V, Ibraghimov-Beskrovnaya O. Correction of cilia structure and function alleviates multi-organ pathology in Bardet-Biedl syndrome mice. Hum Mol Genet 2021; 29:2508-2522. [PMID: 32620959 PMCID: PMC7471507 DOI: 10.1093/hmg/ddaa138] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Revised: 06/22/2020] [Accepted: 07/01/2020] [Indexed: 12/21/2022] Open
Abstract
Bardet–Biedl syndrome (BBS) is a pleiotropic autosomal recessive ciliopathy affecting multiple organs. The development of potential disease-modifying therapy for BBS will require concurrent targeting of multi-systemic manifestations. Here, we show for the first time that monosialodihexosylganglioside accumulates in Bbs2−/− cilia, indicating impairment of glycosphingolipid (GSL) metabolism in BBS. Consequently, we tested whether BBS pathology in Bbs2−/− mice can be reversed by targeting the underlying ciliary defect via reduction of GSL metabolism. Inhibition of GSL synthesis with the glucosylceramide synthase inhibitor Genz-667161 decreases the obesity, liver disease, retinal degeneration and olfaction defect in Bbs2−/− mice. These effects are secondary to preservation of ciliary structure and signaling, and stimulation of cellular differentiation. In conclusion, reduction of GSL metabolism resolves the multi-organ pathology of Bbs2−/− mice by directly preserving ciliary structure and function towards a normal phenotype. Since this approach does not rely on the correction of the underlying genetic mutation, it might translate successfully as a treatment for other ciliopathies.
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Affiliation(s)
- Hervé Husson
- Rare and Neurologic Diseases Research, Sanofi, Framingham, MA 01701, USA
| | - Nikolay O Bukanov
- Rare and Neurologic Diseases Research, Sanofi, Framingham, MA 01701, USA
| | - Sarah Moreno
- Rare and Neurologic Diseases Research, Sanofi, Framingham, MA 01701, USA
| | - Mandy M Smith
- Rare and Neurologic Diseases Research, Sanofi, Framingham, MA 01701, USA
| | | | - Cheng Zhu
- Translational Sciences, Sanofi, Framingham, MA 01701, USA
| | - Tyler Picariello
- Rare and Neurologic Diseases Research, Sanofi, Framingham, MA 01701, USA
| | - Hyejung Park
- Pre-Development Sciences, Sanofi, Waltham, MA 02451, USA
| | - Bing Wang
- Pre-Development Sciences, Sanofi, Waltham, MA 02451, USA
| | - Thomas A Natoli
- Rare and Neurologic Diseases Research, Sanofi, Framingham, MA 01701, USA
| | - Laurie A Smith
- Rare and Neurologic Diseases Research, Sanofi, Framingham, MA 01701, USA
| | - Stefano Zanotti
- Rare and Neurologic Diseases Research, Sanofi, Framingham, MA 01701, USA
| | - Ryan J Russo
- Rare and Neurologic Diseases Research, Sanofi, Framingham, MA 01701, USA
| | | | | | - Vijay Modur
- Rare Diseases Development, Sanofi, Cambridge, MA 02142, USA
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Hp-s1 Ganglioside Suppresses Proinflammatory Responses by Inhibiting MyD88-Dependent NF-κB and JNK/p38 MAPK Pathways in Lipopolysaccharide-Stimulated Microglial Cells. Mar Drugs 2020; 18:md18100496. [PMID: 33003399 PMCID: PMC7600735 DOI: 10.3390/md18100496] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 09/21/2020] [Accepted: 09/23/2020] [Indexed: 02/06/2023] Open
Abstract
Hp-s1 ganglioside is isolated from the sperm of sea urchin (Hemicentrotus pulcherrimus). In addition to neuritogenic activity, the biological function of Hp-s1 in neuroinflammation is unknown. In this study, we investigated the anti-neuroinflammatory effect of Hp-s1 on lipopolysaccharide (LPS)-stimulated microglial cells. MG6 microglial cells were stimulated with LPS in the presence or absence of different Hp-s1 concentrations. The anti-inflammatory effect and underlying mechanism of Hp-s1 in LPS-activated microglia cells were assessed through a Cell Counting kit-8 assay, Western blot analysis, and immunofluorescence. We found that Hp-s1 suppressed not only the expression of inducible nitric oxide synthase and cyclooxygenase-2 but also the expression of proinflammatory cytokines, such as TNF-α, IL-1β, and IL-6. Hp-s1 inhibited the LPS-induced NF-κB signaling pathway by attenuating the phosphorylation and translocation of NF-κB p65 and by disrupting the degradation and phosphorylation of inhibitor κB-α (IκBα). Moreover, Hp-s1 inhibited the LPS-induced phosphorylation of p38 mitogen-activated protein kinase (MAPK) and c-Jun N-terminal kinase (JNK). Hp-s1 also reduced the expression of myeloid differentiation factor 88 (MyD88) and TNF receptor-associated factors 6 (TRAF6), which are prerequisites for NF-κB and MAPKs activation. These findings indicated that Hp-s1 alleviated LPS-induced proinflammatory responses in microglial cells by downregulating MyD88-mediated NF-κB and JNK/p38 MAPK signaling pathways, suggesting further evaluation as a new anti-neuroinflammatory drug.
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9
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Hamamura K, Hotta H, Murakumo Y, Shibuya H, Kondo Y, Furukawa K. SSEA-3 and 4 are not essential for the induction or properties of mouse iPS cells. J Oral Sci 2020; 62:393-396. [PMID: 32684574 DOI: 10.2334/josnusd.19-0513] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
Stage-specific embryonic antigens (SSEA-1, 3, and 4) are carbohydrate antigens that have been used as markers of embryonic stem (ES) cells. However, the roles of these antigens in the establishment and maintenance of stemness of ES and induced pluripotent stem (iPS) cells are still poorly understood. This study investigated the biological and functional significance of globo-series glycolipids such as SSEA-3 and 4 in mouse iPS cells induced from tail-tip fibroblasts (TTFs) of α1,4Gal-T-knockout mice (lacking SSEA-3 and 4). These iPS cells were induced by retroviral transduction of four factors (Oct3/4, Sox2, Klf4, and c-Myc) into TTFs, and colonies were picked up. Morphologically, the colonies resembled ES cells and were positive for alkaline phosphatase and ES cell markers. Furthermore, in vitro-differentiated induction experiments after embryoid body formation revealed that some colonies derived from α1, 4Gal-T knockout mice were able to differentiate into three germ layers. Three germ layers were also observed in teratomas from iPS cells derived from α1,4Gal-T-knockout mice. These results suggest that SSEA-3 and 4 are not essential, at least for the establishment and maintenance of stemness of mouse iPS cells.
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Affiliation(s)
- Kazunori Hamamura
- Department of Pharmacology, School of Dentistry, Aichi Gakuin University
| | - Hiroshi Hotta
- Department of Biochemistry II, Nagoya University Graduate School of Medicine
| | | | - Hidenobu Shibuya
- Department of Biochemistry II, Nagoya University Graduate School of Medicine
| | - Yuji Kondo
- Department of Biochemistry II, Nagoya University Graduate School of Medicine
| | - Koichi Furukawa
- Department of Biochemistry II, Nagoya University Graduate School of Medicine.,Department of Biomedical Sciences, Chubu University College of Life and Health Sciences
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10
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Furukawa K, Ohmi Y, Yesmin F, Tajima O, Kondo Y, Zhang P, Hashimoto N, Ohkawa Y, Bhuiyan RH, Furukawa K. Novel Molecular Mechanisms of Gangliosides in the Nervous System Elucidated by Genetic Engineering. Int J Mol Sci 2020; 21:ijms21061906. [PMID: 32168753 PMCID: PMC7139306 DOI: 10.3390/ijms21061906] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Revised: 02/29/2020] [Accepted: 03/06/2020] [Indexed: 12/13/2022] Open
Abstract
Acidic glycosphingolipids, i.e., gangliosides, are predominantly and consistently expressed in nervous tissues of vertebrates at high levels. Therefore, they are considered to be involved in the development and function of nervous systems. Recent studies involving genetic engineering of glycosyltransferase genes have revealed novel aspects of the roles of gangliosides in the regulation of nervous tissues. In this review, novel findings regarding ganglioside functions and their modes of action elucidated mainly by studies of gene knockout mice are summarized. In particular, the roles of gangliosides in the regulation of lipid rafts to maintain the integrity of nervous systems are reported with a focus on the roles in the regulation of neuro-inflammation and neurodegeneration via complement systems. In addition, recent advances in studies of congenital neurological disorders due to genetic mutations of ganglioside synthase genes and also in the techniques for the analysis of ganglioside functions are introduced.
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Affiliation(s)
- Koichi Furukawa
- Department of Biomedical Sciences, Chubu University College of Life and Health Sciences, 1200 Matsumoto, Kasugai, Aichi 487-8501, Japan; (F.Y.); (O.T.); (P.Z.); (R.H.B.); (K.F.)
- Department of Biochemistry II, Nagoya University Graduate School of Medicine, 65 Tsurumai, Showa-ku, Nagoya 466-0065, Japan;
- Correspondence: ; Tel./Fax: +81-568-51-9512
| | - Yuhsuke Ohmi
- Department of Medical Technology, Chubu University College of Life and Health Sciences, 1200 Matsumoto, Kasugai, Aichi 487-8501, Japan;
| | - Farhana Yesmin
- Department of Biomedical Sciences, Chubu University College of Life and Health Sciences, 1200 Matsumoto, Kasugai, Aichi 487-8501, Japan; (F.Y.); (O.T.); (P.Z.); (R.H.B.); (K.F.)
- Department of Biochemistry II, Nagoya University Graduate School of Medicine, 65 Tsurumai, Showa-ku, Nagoya 466-0065, Japan;
| | - Orie Tajima
- Department of Biomedical Sciences, Chubu University College of Life and Health Sciences, 1200 Matsumoto, Kasugai, Aichi 487-8501, Japan; (F.Y.); (O.T.); (P.Z.); (R.H.B.); (K.F.)
| | - Yuji Kondo
- Department of Biochemistry II, Nagoya University Graduate School of Medicine, 65 Tsurumai, Showa-ku, Nagoya 466-0065, Japan;
| | - Pu Zhang
- Department of Biomedical Sciences, Chubu University College of Life and Health Sciences, 1200 Matsumoto, Kasugai, Aichi 487-8501, Japan; (F.Y.); (O.T.); (P.Z.); (R.H.B.); (K.F.)
- Department of Biochemistry II, Nagoya University Graduate School of Medicine, 65 Tsurumai, Showa-ku, Nagoya 466-0065, Japan;
| | - Noboru Hashimoto
- Department of Tissue Regeneration, Tokushima University Graduate School of Biomedical Sciences, 3-18-5, Kuramoto-cho, Tokushima 770-8504, Japan;
| | - Yuki Ohkawa
- Department of Glycooncology, Osaka International Cancer Institute, Osaka 541-8567, Japan;
| | - Robiul H. Bhuiyan
- Department of Biomedical Sciences, Chubu University College of Life and Health Sciences, 1200 Matsumoto, Kasugai, Aichi 487-8501, Japan; (F.Y.); (O.T.); (P.Z.); (R.H.B.); (K.F.)
| | - Keiko Furukawa
- Department of Biomedical Sciences, Chubu University College of Life and Health Sciences, 1200 Matsumoto, Kasugai, Aichi 487-8501, Japan; (F.Y.); (O.T.); (P.Z.); (R.H.B.); (K.F.)
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11
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Mass Spectrometry Imaging of Lipids in Human Skin Disease Model Hidradenitis Suppurativa by Laser Desorption Ionization from Silicon Nanopost Arrays. Sci Rep 2019; 9:17508. [PMID: 31767918 PMCID: PMC6877612 DOI: 10.1038/s41598-019-53938-0] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Accepted: 10/11/2019] [Indexed: 12/20/2022] Open
Abstract
Neutral lipids have been implicated in a host of potentially debilitating human diseases, such as heart disease, type-2 diabetes, and metabolic syndrome. Matrix-assisted laser desorption ionization (MALDI), the method-of-choice for mass spectrometry imaging (MSI), has led to remarkable success in imaging several lipid classes from biological tissue sections. However, due to ion suppression by phospholipids, MALDI has limited ability to efficiently ionize and image neutral lipids, such as triglycerides (TGs). To help overcome this obstacle, we have utilized silicon nanopost arrays (NAPA), a matrix-free laser desorption ionization (LDI) platform. Hidradenitis suppurativa (HS) is a chronic, recurrent inflammatory skin disease of the apocrine sweat glands. The ability of NAPA to efficiently ionize lipids is exploited in the analysis of human skin samples from sufferers of HS. Ionization by LDI from NAPA allows for the detection and imaging of a number of neutral lipid species, including TGs comprised of shorter, odd-chain fatty acids, which strongly suggests an increased bacterial load within the host tissue, as well as hexosylceramides (HexCers) and galabiosyl-/lactosylceramides that appear to be correlated with the presence of HS. Our results demonstrate that NAPA-LDI-MSI is capable of imaging and potentially differentiating healthy and diseased human skin tissues based on changes in detected neutral lipid composition.
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12
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Noda A, Kato M, Miyazaki S, Kyogashima M. Separation of glycosphingolipids with titanium dioxide. Glycoconj J 2018; 35:493-498. [PMID: 30284662 DOI: 10.1007/s10719-018-9844-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2017] [Revised: 09/19/2018] [Accepted: 09/20/2018] [Indexed: 12/20/2022]
Abstract
We introduce the principle of a new technique to isolate glycosphingolipids (GSLs) from phospholipids. Neutral and acidic GSLs in organic solvent bind to titanium dioxide under neutral pH and can be eluted with 5 mg/ml of 2,5-dihydroxybenzoic acid in methanol. This special property is applicable for eliminating phospholipids, including sphingomyelin, which cannot be eliminated by a typical mild alkaline treatment. By using this technique, we demonstrated the rapid separation of minor components of GSLs, namely sulfatide and gangliosides from rabbit serum and liver, respectively. The minor GSL components were effectively purified despite both sources containing tremendous amount of phospholipids and simple lipids such as cholesterol, cholesteryl esters and triglycerides.
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Affiliation(s)
- Ayaka Noda
- Division of Microbiology and Molecular Cell Biology, Nihon Pharmaceutical University, 10281 Komuro, Inamachi, Saitama, 362-0806, Japan
| | - Miki Kato
- Division of Microbiology and Molecular Cell Biology, Nihon Pharmaceutical University, 10281 Komuro, Inamachi, Saitama, 362-0806, Japan
| | - Shota Miyazaki
- GL Sciences Inc., 237-2 Sayamagahara, Iruma, Saitama, 358-0032, Japan
| | - Mamoru Kyogashima
- Division of Microbiology and Molecular Cell Biology, Nihon Pharmaceutical University, 10281 Komuro, Inamachi, Saitama, 362-0806, Japan.
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13
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Gangliosides in Inflammation and Neurodegeneration. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2018; 156:265-287. [PMID: 29747817 DOI: 10.1016/bs.pmbts.2018.01.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Gangliosides play roles in the regulation of cell signaling that are mediated via membrane microdomains, lipid rafts. In this review, functions of gangliosides in the maintenance of nervous systems with a focus on regulation of inflammation and neurodegeneration are addressed. During analyses of various ganglioside-lacking mutant mice, we demonstrated that nervous tissues exhibited inflammatory reactions and subsequent neurodegeneration. Among inflammation-related genes, factors of the complement system showed up-regulation with aging. Analyses of architectures and compositions of lipid rafts in nervous tissues from these mutant mice revealed that dysfunctions of complement regulatory proteins based on disrupted lipid rafts were main factors to induce the inflammatory reactions resulting in neurodegeneration. Ganglioside changes in development and senescence, and implication of them in the integrity of cell membranes and cellular phenotypes in physiological and pathological conditions including Alzheimer disease have been summarized. Novel directions to further analyze mechanisms for ganglioside functions in membrane microdomains have been also addressed.
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14
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Shishido F, Uemura S, Kashimura M, Inokuchi JI. Identification of a new B4GalNAcT1 (GM2/GD2/GA2 synthase) isoform, and regulation of enzyme stability and intracellular transport by arginine-based motif. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2017; 1859:2001-2011. [PMID: 28709807 DOI: 10.1016/j.bbamem.2017.07.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2017] [Revised: 06/17/2017] [Accepted: 07/10/2017] [Indexed: 11/26/2022]
Abstract
Glycosphingolipids (GSLs) are abundant in plasma membranes of mammalian cells, and their synthesis is strictly regulated in the Golgi apparatus. Disruption of GSL homeostasis is the cause of numerous diseases. Hundreds of molecular species of GSLs exist, and the detailed mechanisms underlying their homeostasis remain unclear. We investigated the physiological significance of isoform production for β1,4-N-acetyl-galactosaminyl transferase 1/B4GALNT1 (B4GN1), an enzyme involved in synthesis of ganglio-series GSLs GM2/GD2/GA2. We discovered a new mRNA variant (termed variant 2) of B4GN1 through EST clone search. A new isoform, M1-B4GN1, which has an NH2-terminal cytoplasmic tail longer than that of previously-known isoform M2-B4GN1, is translated from variant 2. M1-B4GN1 has R-based motif (a retrograde transport signal) in the cytoplasmic tail. M1-B4GN1 is partially localized in the endoplasmic reticulum (ER) depending on the R-based motif, whereas M2-B4GN1 is localized in the Golgi. Stability of M1-B4GN1 is higher than that of M2-B4GN1 because of the R-based motif. M2-B4GN1 forms a homodimer via disulfide bonding. When M1-B4GN1 and M2-B4GN1 were co-expressed in CHO-K1 cells, the two isoforms formed a heterodimer. The M1/M2-B4GN1 heterodimer was more stable than the M2-B4GN1 homodimer, but the heterodimer was not transported from the Golgi to the ER. Our findings indicate that stabilization of M1-B4GN1 homodimer and M1/M2-B4GN1 heterodimer by R-based motif is related to prolongation of Golgi retention, but not to retrograde transport from the Golgi to the ER. Coexistence of several B4GN1 isoforms having distinctive characteristics presumably helps maintain overall enzyme stability and GSL homeostasis.
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Affiliation(s)
- Fumi Shishido
- Division of Glycopathology, Institute of Molecular Biomembrane and Glycobiology, Tohoku Medical and Pharmaceutical University, 4-4-1, Komatsushima, Aoba-ku, Sendai, Miyagi 981-8558, Japan
| | - Satoshi Uemura
- Division of Medical Biochemistry, Faculty of Medicine, Tohoku Medical and Pharmaceutical University, 4-4-1, Komatsushima, Aoba-ku, Sendai, Miyagi 981-8558, Japan; Division of Chemistry and Biological Science, College of Science and Engineering, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa 252-5258, Japan.
| | - Madoka Kashimura
- Division of Glycopathology, Institute of Molecular Biomembrane and Glycobiology, Tohoku Medical and Pharmaceutical University, 4-4-1, Komatsushima, Aoba-ku, Sendai, Miyagi 981-8558, Japan
| | - Jin-Ichi Inokuchi
- Division of Glycopathology, Institute of Molecular Biomembrane and Glycobiology, Tohoku Medical and Pharmaceutical University, 4-4-1, Komatsushima, Aoba-ku, Sendai, Miyagi 981-8558, Japan.
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15
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Nel M, Jalali Sefid Dashti M, Gamieldien J, Heckmann JM. Exome sequencing identifies targets in the treatment-resistant ophthalmoplegic subphenotype of myasthenia gravis. Neuromuscul Disord 2017; 27:816-825. [PMID: 28673556 DOI: 10.1016/j.nmd.2017.06.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Revised: 06/13/2017] [Accepted: 06/14/2017] [Indexed: 12/25/2022]
Abstract
Treatment-resistant ophthalmoplegia (OP-MG) is not uncommon in individuals with African genetic ancestry and myasthenia gravis (MG). To identify OP-MG susceptibility genes, extended whole exome sequencing was performed using extreme phenotype sampling (11 OP-MG vs 4 control-MG) all with acetylcholine receptor-antibody positive MG. This approach identified 356 variants that were twice as frequent in OP-MG compared to control-MG individuals. After performing probability test estimates and filtering variants according to those 'suggestive' of association with OP-MG (p < 0.05), only three variants remained which were expressed in extraocular muscles. Validation in 25 OP-MG and 50 control-MG cases supported the association of DDX17delG (p = 0.014) and SPTLC3insACAC (p = 0.055) with OP-MG, but ST8SIA1delCCC could not be verified by Sanger sequencing. A parallel approach, using a semantic model informed by current knowledge of MG-pathways, identified an African-specific interleukin-6 receptor (IL6R) variant, IL6R c.*3043 T>C, that was more frequent in OP-MG compared to control-MG cases (p = 0.069) and population controls (p = 0.043). A weighted genetic risk score, derived from the odds ratios of association of these variants with OP-MG, correlated with the OP-MG phenotype as opposed to control MG. This unbiased approach implicates several potentially functional gene variants in the gangliosphingolipid and myogenesis pathways in the development of the OP-MG subphenotype.
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Affiliation(s)
- Melissa Nel
- Neurology Division, Department of Medicine, University of Cape Town, Cape Town, South Africa
| | | | - Junaid Gamieldien
- South African National Bioinformatics Institute, University of the Western Cape, Bellville, South Africa
| | - Jeannine M Heckmann
- Neurology Division, Department of Medicine, University of Cape Town, Cape Town, South Africa.
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16
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Nakamura H, Moriyama Y, Watanabe K, Tomizawa S, Yamazaki R, Takahashi H, Murayama T. Lactosylceramide-Induced Phosphorylation Signaling to Group IVA Phospholipase A 2 via Reactive Oxygen Species in Tumor Necrosis Factor-α-Treated Cells. J Cell Biochem 2017; 118:4370-4382. [PMID: 28444900 DOI: 10.1002/jcb.26091] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Accepted: 04/24/2017] [Indexed: 12/16/2022]
Abstract
The activity of α-type cytosolic phospholipase A2 (cPLA2 α, group IVA PLA2 ), which releases arachidonic acid (AA), is mainly regulated by the Ca2+ -induced intracellular translocation/attachment of the enzyme to substrate membranes and its phosphorylation. We previously reported that tumor necrosis factor-α (TNFα) stimulated the formation of lactosylceramide (LacCer) in L929 fibroblast cells, and this lipid directly bound with and activated cPLA2 α [Nakamura et al. [2013] J. Biol. Chem. 288:23264-23272]. We herein investigated the role of phosphorylation signaling in the TNFα/LacCer-induced activation of cPLA2 α in cells. TNFα-treated L929 cells released AA via the phosphorylation of extracellular signal-regulated kinase 1/2 (ERK1/2) and cPLA2 α, while a treatment with LacCer alone released AA in a similar manner. The TNFα-induced responses including release of AA were decreased by the inhibition of LacCer synthesis. The treatment with TNFα and LacCer increased the levels of reactive oxygen species (ROS), and the reduction/scavenging of ROS decreased the phosphorylation cascade and release of AA in TNFα/LacCer-treated L929 cells. In the cell line CHO, the treatment with LacCer stimulated the phosphorylation cascade and release of AA via the formation of ROS. Treatments with the anti-LacCer antibody and 4β-phorbol 12-myristate 13-acetate stimulated the phosphorylation cascade, but did not release AA by itself. When combined with the Ca2+ ionophore A23187, treatments with the anti-LacCer antibody and 4β-phorbol 12-myristate 13-acetate released AA. These results, including our previous findings, showed that LacCer alone simultaneously stimulates two processes to activate cPLA2 α: a phosphorylation signal and attachment of the enzyme to substrate membranes. J. Cell. Biochem. 118: 4370-4382, 2017. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
- Hiroyuki Nakamura
- Laboratory of Chemical Pharmacology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, 260-8675, Japan
| | - Yuta Moriyama
- Laboratory of Chemical Pharmacology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, 260-8675, Japan
| | - Kazuaki Watanabe
- Laboratory of Chemical Pharmacology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, 260-8675, Japan
| | - Satoshi Tomizawa
- Laboratory of Chemical Pharmacology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, 260-8675, Japan
| | - Risa Yamazaki
- Laboratory of Chemical Pharmacology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, 260-8675, Japan
| | - Hiromasa Takahashi
- Laboratory of Chemical Pharmacology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, 260-8675, Japan
| | - Toshihiko Murayama
- Laboratory of Chemical Pharmacology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, 260-8675, Japan
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17
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Kempf SJ, Metaxas A, Ibáñez-Vea M, Darvesh S, Finsen B, Larsen MR. An integrated proteomics approach shows synaptic plasticity changes in an APP/PS1 Alzheimer's mouse model. Oncotarget 2016; 7:33627-48. [PMID: 27144524 PMCID: PMC5085108 DOI: 10.18632/oncotarget.9092] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Accepted: 04/19/2016] [Indexed: 02/07/2023] Open
Abstract
The aim of this study was to elucidate the molecular signature of Alzheimer's disease-associated amyloid pathology.We used the double APPswe/PS1ΔE9 mouse, a widely used model of cerebral amyloidosis, to compare changes in proteome, including global phosphorylation and sialylated N-linked glycosylation patterns, pathway-focused transcriptome and neurological disease-associated miRNAome with age-matched controls in neocortex, hippocampus, olfactory bulb and brainstem. We report that signalling pathways related to synaptic functions associated with dendritic spine morphology, neurite outgrowth, long-term potentiation, CREB signalling and cytoskeletal dynamics were altered in 12 month old APPswe/PS1ΔE9 mice, particularly in the neocortex and olfactory bulb. This was associated with cerebral amyloidosis as well as formation of argyrophilic tangle-like structures and microglial clustering in all brain regions, except for brainstem. These responses may be epigenetically modulated by the interaction with a number of miRNAs regulating spine restructuring, Aβ expression and neuroinflammation.We suggest that these changes could be associated with development of cognitive dysfunction in early disease states in patients with Alzheimer's disease.
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Affiliation(s)
- Stefan J. Kempf
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense M, Denmark
| | - Athanasios Metaxas
- Institute of Molecular Medicine, University of Southern Denmark, Odense C, Denmark
| | - María Ibáñez-Vea
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense M, Denmark
| | - Sultan Darvesh
- Department of Medical Neuroscience, Dalhousie University, Halifax, NS, Canada
- Department of Medicine (Neurology and Geriatric Medicine), Dalhousie University, Halifax, NS, Canada
| | - Bente Finsen
- Institute of Molecular Medicine, University of Southern Denmark, Odense C, Denmark
| | - Martin R. Larsen
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense M, Denmark
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18
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Torretta E, Fania C, Vasso M, Gelfi C. HPTLC-MALDI MS for (glyco)sphingolipid multiplexing in tissues and blood: A promising strategy for biomarker discovery and clinical applications. Electrophoresis 2016; 37:2036-49. [DOI: 10.1002/elps.201600094] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Revised: 04/29/2016] [Accepted: 05/02/2016] [Indexed: 12/17/2022]
Affiliation(s)
- Enrica Torretta
- Department of Biomedical Sciences for Health; University of Milan; Milan Italy
- IRCCS Policlinico San Donato; Piazza Edmondo Malan; San Donato Milanese Milan Italy
| | - Chiara Fania
- IRCCS Policlinico San Donato; Piazza Edmondo Malan; San Donato Milanese Milan Italy
| | - Michele Vasso
- Institute of Molecular Bioimaging and Physiology (IBFM); CNR Milan Italy
| | - Cecilia Gelfi
- Department of Biomedical Sciences for Health; University of Milan; Milan Italy
- IRCCS Policlinico San Donato; Piazza Edmondo Malan; San Donato Milanese Milan Italy
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19
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Steil D, Schepers CL, Pohlentz G, Legros N, Runde J, Humpf HU, Karch H, Müthing J. Shiga toxin glycosphingolipid receptors of Vero-B4 kidney epithelial cells and their membrane microdomain lipid environment. J Lipid Res 2015; 56:2322-36. [PMID: 26464281 DOI: 10.1194/jlr.m063040] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2015] [Indexed: 12/12/2022] Open
Abstract
Shiga toxins (Stxs) are produced by enterohemorrhagic Escherichia coli (EHEC), which cause human infections with an often fatal outcome. Vero cell lines, derived from African green monkey kidney, represent the gold standard for determining the cytotoxic effects of Stxs. Despite their global use, knowledge about the exact structures of the Stx receptor glycosphingolipids (GSLs) and their assembly in lipid rafts is poor. Here we present a comprehensive structural analysis of Stx receptor GSLs and their distribution to detergent-resistant membranes (DRMs), which were prepared from Vero-B4 cells and used as lipid raft equivalents. We identified globotriaosylceramide (Gb3Cer) and globotetraosylceramide (Gb4Cer) as the GSL receptors for Stx1a, Stx2a, and Stx2e subtypes using TLC overlay detection combined with MS. The uncommon Stx receptor, globopentaosylceramide (Gb5Cer, Galβ3GalNAcβ3Galα4Galβ4Glcβ1Cer), which was specifically recognized (in addition to Gb3Cer and Gb4Cer) by Stx2e, was fully structurally characterized. Lipoforms of Stx receptor GSLs were found to mainly harbor ceramide moieties composed of sphingosine (d18:1) and C24:0/C24:1 or C16:0 fatty acid. Moreover, co-occurrence with lipid raft markers, SM and cholesterol, in DRMs suggested GSL association with membrane microdomains. This study provides the basis for further exploring the functional impact of lipid raft-associated Stx receptors for toxin-mediated injury of Vero-B4 cells.
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Affiliation(s)
- Daniel Steil
- Institutes for Hygiene University of Münster, D-48149 Münster, Germany
| | | | | | - Nadine Legros
- Institutes for Hygiene University of Münster, D-48149 Münster, Germany
| | - Jana Runde
- Food Chemistry, University of Münster, D-48149 Münster, Germany
| | | | - Helge Karch
- Institutes for Hygiene University of Münster, D-48149 Münster, Germany
| | - Johannes Müthing
- Institutes for Hygiene University of Münster, D-48149 Münster, Germany Interdisciplinary Center for Clinical Research (IZKF), University of Münster, D-48149 Münster, Germany
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