1
|
Maines LW, Keller SN, Smith RA, Schrecengost RS, Smith CD. Opaganib Downregulates N-Myc Expression and Suppresses In Vitro and In Vivo Growth of Neuroblastoma Cells. Cancers (Basel) 2024; 16:1779. [PMID: 38730731 PMCID: PMC11082966 DOI: 10.3390/cancers16091779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2024] [Revised: 04/25/2024] [Accepted: 04/29/2024] [Indexed: 05/13/2024] Open
Abstract
Neuroblastoma (NB), the most common cancer in infants and the most common solid tumor outside the brain in children, grows aggressively and responds poorly to current therapies. We have identified a new drug (opaganib, also known as ABC294640) that modulates sphingolipid metabolism by inhibiting the synthesis of sphingosine 1-phosphate (S1P) by sphingosine kinase-2 and elevating dihydroceramides by inhibition of dihydroceramide desaturase. The present studies sought to determine the potential therapeutic activity of opaganib in cell culture and xenograft models of NB. Cytotoxicity assays demonstrated that NB cells, including cells with amplified MYCN, are effectively killed by opaganib concentrations well below those that accumulate in tumors in vivo. Opaganib was shown to cause dose-dependent decreases in S1P and hexosylceramide levels in Neuro-2a cells, while concurrently elevating levels of dihydroceramides. As with other tumor cells, opaganib reduced c-Myc and Mcl-1 protein levels in Neuro-2a cells, and also reduced the expression of the N-Myc protein. The in vivo growth of xenografts of human SK-N-(BE)2 cells with amplified MYCN was suppressed by oral administration of opaganib at doses that are well tolerated in mice. Combining opaganib with temozolomide plus irinotecan, considered the backbone for therapy of relapsed or refractory NB, resulted in increased antitumor activity in vivo compared with temozolomide plus irinotecan or opaganib alone. Mice did not lose additional weight when opaganib was combined with temozolomide plus irinotecan, indicating that the combination is well tolerated. Opaganib has additive antitumor activity toward Neuro-2a tumors when combined with the checkpoint inhibitor anti-CTLA-4 antibody; however, the combination of opaganib with anti-PD-1 or anti-PD-L1 antibodies did not provide increased antitumor activity over that seen with opaganib alone. Overall, the data demonstrate that opaganib modulates sphingolipid metabolism and intracellular signaling in NB cells and inhibits NB tumor growth alone and in combination with other anticancer drugs. Amplified MYCN does not confer resistance to opaganib, and, in fact, the drug attenuates the expression of both c-Myc and N-Myc. The safety of opaganib has been established in clinical trials with adults with advanced cancer or severe COVID-19, and so opaganib has excellent potential for treating patients with NB, particularly in combination with temozolomide and irinotecan or anti-CTLA-4 antibody.
Collapse
Affiliation(s)
| | | | | | | | - Charles D. Smith
- Apogee Biotechnology Corporation, 1214 Research Blvd, Suite 2015, Hummelstown, PA 17036, USA
| |
Collapse
|
2
|
The unfolding role of ceramide in coordinating retinoid-based cancer therapy. Biochem J 2021; 478:3621-3642. [PMID: 34648006 DOI: 10.1042/bcj20210368] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 09/02/2021] [Accepted: 09/03/2021] [Indexed: 12/30/2022]
Abstract
Sphingolipid-mediated regulation in cancer development and treatment is largely ceramide-centered with the complex sphingolipid metabolic pathways unfolding as attractive targets for anticancer drug discovery. The dynamic interconversion of sphingolipids is tightly controlled at the level of enzymes and cellular compartments in response to endogenous or exogenous stimuli, such as anticancer drugs, including retinoids. Over the past two decades, evidence emerged that retinoids owe part of their potency in cancer therapy to modulation of sphingolipid metabolism and ceramide generation. Ceramide has been proposed as a 'tumor-suppressor lipid' that orchestrates cell growth, cell cycle arrest, cell death, senescence, autophagy, and metastasis. There is accumulating evidence that cancer development is promoted by the dysregulation of tumor-promoting sphingolipids whereas cancer treatments can kill tumor cells by inducing the accumulation of endogenous ceramide levels. Resistance to cancer therapy may develop due to a disrupted equilibrium between the opposing roles of tumor-suppressor and tumor-promoter sphingolipids. Despite the undulating effect and complexity of sphingolipid pathways, there are emerging opportunities for a plethora of enzyme-targeted therapeutic interventions that overcome resistance resulting from perturbed sphingolipid pathways. Here, we have revisited the interconnectivity of sphingolipid metabolism and the instrumental role of ceramide-biosynthetic and degradative enzymes, including bioactive sphingolipid products, how they closely relate to cancer treatment and pathogenesis, and the interplay with retinoid signaling in cancer. We focused on retinoid targeting, alone or in combination, of sphingolipid metabolism nodes in cancer to enhance ceramide-based therapeutics. Retinoid and ceramide-based cancer therapy using novel strategies such as combination treatments, synthetic retinoids, ceramide modulators, and delivery formulations hold promise in the battle against cancer.
Collapse
|
3
|
Mimiroglu D, Yanik T, Ercan B. Nanophase surface arrays on poly (lactic-co-glycolic acid) upregulate neural cell functions. J Biomed Mater Res A 2021; 110:64-75. [PMID: 34245100 DOI: 10.1002/jbm.a.37266] [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] [Received: 02/08/2021] [Revised: 06/14/2021] [Accepted: 06/29/2021] [Indexed: 01/07/2023]
Abstract
Nerve guidance channels (NGCs) promote cell-extracellular matrix (ECM) interactions occurring within the nanoscale. However, studies focusing on the effects of nanophase topography on neural cell functions are limited, and mostly concentrated on the sub-micron level (>100 nm) surface topography. Therefore, the aim of this study was to fabricate <100 nm sized structures on poly lactic-co-glycolic acid (PLGA) films used in NGC applications to assess the effects of nanophase topography on neural cell functions. For this purpose, nanopit surface arrays were fabricated on PLGA surfaces via replica molding method. The results showed that neural cell proliferation increased up to 65% and c-fos protein expression increased up to 76% on PLGA surfaces having nanophase surface arrays compared to the control samples. It was observed that neural cells spread to a greater extend and formed more neurite extensions on the nanoarrayed surfaces compared to the control samples. These results were correlated with increased hydrophilicity and roughness of the nanophase PLGA surfaces, and point toward the promise of using nanoarrayed surfaces in NGC applications.
Collapse
Affiliation(s)
- Didem Mimiroglu
- Biochemistry, Graduate School of Natural and Applied Science, Middle East Technical University, Ankara, Turkey.,Biochemistry, Faculty of Science, Sivas Cumhuriyet University, Sivas, Turkey
| | - Tulin Yanik
- Biochemistry, Graduate School of Natural and Applied Science, Middle East Technical University, Ankara, Turkey.,Department of Biological Sciences, Middle East Technical University, Ankara, Turkey
| | - Batur Ercan
- Department of Metallurgical and Materials Engineering, Middle East Technical University, Ankara, Turkey.,BIOMATEN, Center of Excellence in Biomaterials and Tissue Engineering, Middle East Technical University, Ankara, Turkey
| |
Collapse
|
4
|
Sugiyama T, Yamamoto H, Kon T, Chaya T, Omori Y, Suzuki Y, Abe K, Watanabe D, Furukawa T. The potential role of Arhgef33 RhoGEF in foveal development in the zebra finch retina. Sci Rep 2020; 10:21450. [PMID: 33293601 PMCID: PMC7722920 DOI: 10.1038/s41598-020-78452-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Accepted: 11/17/2020] [Indexed: 01/11/2023] Open
Abstract
The fovea is a pit formed in the center of the retina that enables high-acuity vision in certain vertebrate species. While formation of the fovea fascinates many researchers, the molecular mechanisms underlying foveal development are poorly understood. In the current study, we histologically investigated foveal development in zebra finch (Taeniopygia guttata) and found that foveal pit formation begins just before post-hatch day 14 (P14). We next performed RNA-seq analysis to compare gene expression profiles between the central (foveal and parafoveal) and peripheral retina in zebra finch at P14. We found that the Arhgef33 expression is enriched in the middle layer of the inner nuclear layer at the parafovea, suggesting that Arhgef33 is dominantly expressed in Müller glial cells in the developing parafovea. We then performed a pull-down assay using Rhotekin-RBD and observed GEF activity of Arhgef33 against RhoA. We found that overexpression of Arhgef33 in HEK293 cells induces cell contraction and that Arhgef33 expression inhibits neurite extension in Neuro 2A cells, which is partially recovered by a Rho-kinase (ROCK) inhibitor. Taken together, we used zebra finch as a model animal to investigate foveal development and identified Arhgef33 as a candidate protein possibly involved in foveal development through modulating RhoA activity.
Collapse
Affiliation(s)
- Takefumi Sugiyama
- Laboratory for Molecular and Developmental Biology, Institute for Protein Research, Osaka University, 3-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Haruka Yamamoto
- Laboratory for Molecular and Developmental Biology, Institute for Protein Research, Osaka University, 3-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Tetsuo Kon
- Laboratory for Molecular and Developmental Biology, Institute for Protein Research, Osaka University, 3-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Taro Chaya
- Laboratory for Molecular and Developmental Biology, Institute for Protein Research, Osaka University, 3-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Yoshihiro Omori
- Laboratory for Molecular and Developmental Biology, Institute for Protein Research, Osaka University, 3-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Yutaka Suzuki
- Department of Computational Biology and Medical Sciences, Graduate School of Frontier Sciences, The University of Tokyo, Chiba, 277-8562, Japan
| | - Kentaro Abe
- Laboratory of Brain Development, Graduate School of Life Sciences, Tohoku University, Miyagi, 980-8577, Japan.,Department of Biological Sciences, Graduate School of Medicine, Kyoto University, Kyoto, 606-8501, Japan
| | - Dai Watanabe
- Department of Biological Sciences, Graduate School of Medicine, Kyoto University, Kyoto, 606-8501, Japan
| | - Takahisa Furukawa
- Laboratory for Molecular and Developmental Biology, Institute for Protein Research, Osaka University, 3-2 Yamadaoka, Suita, Osaka, 565-0871, Japan.
| |
Collapse
|
5
|
Chiricozzi E, Maggioni M, di Biase E, Lunghi G, Fazzari M, Loberto N, Elisa M, Scalvini FG, Tedeschi G, Sonnino S. The Neuroprotective Role of the GM1 Oligosaccharide, II 3Neu5Ac-Gg 4, in Neuroblastoma Cells. Mol Neurobiol 2019; 56:6673-6702. [PMID: 30911934 DOI: 10.1007/s12035-019-1556-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Accepted: 03/13/2019] [Indexed: 01/19/2023]
Abstract
Recently, we demonstrated that the GM1 oligosaccharide, II3Neu5Ac-Gg4 (OligoGM1), administered to cultured murine Neuro2a neuroblastoma cells interacts with the NGF receptor TrkA, leading to the activation of the ERK1/2 downstream pathway and to cell differentiation. To understand how the activation of the TrkA pathway is able to trigger key biochemical signaling, we performed a proteomic analysis on Neuro2a cells treated with 50 μM OligoGM1 for 24 h. Over 3000 proteins were identified. Among these, 324 proteins were exclusively expressed in OligoGM1-treated cells. Interestingly, several proteins expressed only in OligoGM1-treated cells are involved in biochemical mechanisms with a neuroprotective potential, reflecting the GM1 neuroprotective effect. In addition, we found that the exogenous administration of OligoGM1 reduced the cellular oxidative stress in Neuro2a cells and conferred protection against MPTP neurotoxicity. These results confirm and reinforce the idea that the molecular mechanisms underlying the GM1 neurotrophic and neuroprotective effects depend on its oligosaccharide chain, suggesting the activation of a positive signaling starting at plasma membrane level.
Collapse
Affiliation(s)
- Elena Chiricozzi
- Department of Medical Biotechnology and Translational Medicine, University of Milan, Via Fratelli Cervi 93, 20090, Segrate, MI, Italy.
| | - Margherita Maggioni
- Department of Medical Biotechnology and Translational Medicine, University of Milan, Via Fratelli Cervi 93, 20090, Segrate, MI, Italy
| | - Erika di Biase
- Department of Medical Biotechnology and Translational Medicine, University of Milan, Via Fratelli Cervi 93, 20090, Segrate, MI, Italy
| | - Giulia Lunghi
- Department of Medical Biotechnology and Translational Medicine, University of Milan, Via Fratelli Cervi 93, 20090, Segrate, MI, Italy
| | - Maria Fazzari
- Department of Medical Biotechnology and Translational Medicine, University of Milan, Via Fratelli Cervi 93, 20090, Segrate, MI, Italy
| | - Nicoletta Loberto
- Department of Medical Biotechnology and Translational Medicine, University of Milan, Via Fratelli Cervi 93, 20090, Segrate, MI, Italy
| | - Maffioli Elisa
- Department of Veterinary Medicine, University of Milan, via Celoria 10, 20133, Milan, Italy
| | | | - Gabriella Tedeschi
- Department of Veterinary Medicine, University of Milan, via Celoria 10, 20133, Milan, Italy
- Fondazione Unimi, v.le Ortles 22/4, 20139, Milan, Italy
| | - Sandro Sonnino
- Department of Medical Biotechnology and Translational Medicine, University of Milan, Via Fratelli Cervi 93, 20090, Segrate, MI, Italy.
| |
Collapse
|
6
|
Kurz J, Parnham MJ, Geisslinger G, Schiffmann S. Ceramides as Novel Disease Biomarkers. Trends Mol Med 2019; 25:20-32. [DOI: 10.1016/j.molmed.2018.10.009] [Citation(s) in RCA: 79] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Revised: 10/23/2018] [Accepted: 10/24/2018] [Indexed: 02/07/2023]
|
7
|
Wepy JA, Galligan JJ, Kingsley PJ, Xu S, Goodman MC, Tallman KA, Rouzer CA, Marnett LJ. Lysophospholipases cooperate to mediate lipid homeostasis and lysophospholipid signaling. J Lipid Res 2018; 60:360-374. [PMID: 30482805 DOI: 10.1194/jlr.m087890] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Revised: 11/05/2018] [Indexed: 12/20/2022] Open
Abstract
Lysophospholipids (LysoPLs) are bioactive lipid species involved in cellular signaling processes and the regulation of cell membrane structure. LysoPLs are metabolized through the action of lysophospholipases, including lysophospholipase A1 (LYPLA1) and lysophospholipase A2 (LYPLA2). A new X-ray crystal structure of LYPLA2 compared with a previously published structure of LYPLA1 demonstrated near-identical folding of the two enzymes; however, LYPLA1 and LYPLA2 have displayed distinct substrate specificities in recombinant enzyme assays. To determine how these in vitro substrate preferences translate into a relevant cellular setting and better understand the enzymes' role in LysoPL metabolism, CRISPR-Cas9 technology was utilized to generate stable KOs of Lypla1 and/or Lypla2 in Neuro2a cells. Using these cellular models in combination with a targeted lipidomics approach, LysoPL levels were quantified and compared between cell lines to determine the effect of losing lysophospholipase activity on lipid metabolism. This work suggests that LYPLA1 and LYPLA2 are each able to account for the loss of the other to maintain lipid homeostasis in cells; however, when both are deleted, LysoPL levels are dramatically increased, causing phenotypic and morphological changes to the cells.
Collapse
Affiliation(s)
- James A Wepy
- A. B. Hancock Jr. Memorial Laboratory for Cancer Research, Departments of Chemistry, Vanderbilt University School of Medicine, Nashville, TN 37232-0146
| | - James J Galligan
- Departments of Biochemistry, Vanderbilt University School of Medicine, Nashville, TN 37232-0146
| | - Philip J Kingsley
- Departments of Biochemistry, Vanderbilt University School of Medicine, Nashville, TN 37232-0146
| | - Shu Xu
- Departments of Biochemistry, Vanderbilt University School of Medicine, Nashville, TN 37232-0146
| | - Michael C Goodman
- A. B. Hancock Jr. Memorial Laboratory for Cancer Research, Departments of Chemistry, Vanderbilt University School of Medicine, Nashville, TN 37232-0146
| | - Keri A Tallman
- A. B. Hancock Jr. Memorial Laboratory for Cancer Research, Departments of Chemistry, Vanderbilt University School of Medicine, Nashville, TN 37232-0146.,Departments of Pharmacology, Vanderbilt University School of Medicine, Nashville, TN 37232-0146
| | - Carol A Rouzer
- Vanderbilt Institute of Chemical Biology, Vanderbilt University School of Medicine, Nashville, TN 37232-0146.,Vanderbilt-Ingram Cancer Center, Vanderbilt University School of Medicine, Nashville, TN 37232-0146
| | - Lawrence J Marnett
- A. B. Hancock Jr. Memorial Laboratory for Cancer Research, Departments of Chemistry, Vanderbilt University School of Medicine, Nashville, TN 37232-0146 .,Departments of Biochemistry, Vanderbilt University School of Medicine, Nashville, TN 37232-0146.,Departments of Pharmacology, Vanderbilt University School of Medicine, Nashville, TN 37232-0146.,Vanderbilt Institute of Chemical Biology, Vanderbilt University School of Medicine, Nashville, TN 37232-0146.,Vanderbilt-Ingram Cancer Center, Vanderbilt University School of Medicine, Nashville, TN 37232-0146
| |
Collapse
|
8
|
Baek A, Park EJ, Kim SY, Nam BG, Kim JH, Jun SW, Kim SH, Cho SR. High-Frequency Repetitive Magnetic Stimulation Enhances the Expression of Brain-Derived Neurotrophic Factor Through Activation of Ca 2+-Calmodulin-Dependent Protein Kinase II-cAMP-Response Element-Binding Protein Pathway. Front Neurol 2018; 9:285. [PMID: 29867712 PMCID: PMC5949612 DOI: 10.3389/fneur.2018.00285] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2017] [Accepted: 04/12/2018] [Indexed: 12/12/2022] Open
Abstract
Repetitive transcranial magnetic stimulation (rTMS) can be used in various neurological disorders. However, neurobiological mechanism of rTMS is not well known. Therefore, in this study, we examined the global gene expression patterns depending on different frequencies of repetitive magnetic stimulation (rMS) in both undifferentiated and differentiated Neuro-2a cells to generate a comprehensive view of the biological mechanisms. The Neuro-2a cells were randomly divided into three groups—the sham (no active stimulation) group, the low-frequency (0.5 Hz stimulation) group, and high-frequency (10 Hz stimulation) group—and were stimulated 10 min for 3 days. The low- and high-frequency groups of rMS on Neuro-2a cells were characterized by transcriptome array. Differentially expressed genes were analyzed using the Database of Annotation Visualization and Integrated Discovery program, which yielded a Kyoto Encyclopedia of Genes and Genomes pathway. Amphetamine addiction pathway, circadian entrainment pathway, long-term potentiation (LTP) pathway, neurotrophin signaling pathway, prolactin signaling pathway, and cholinergic synapse pathway were significantly enriched in high-frequency group compared with low-frequency group. Among these pathways, LTP pathway is relevant to rMS, thus the genes that were involved in LTP pathway were validated by quantitative real-time polymerase chain reaction and western blotting. The expression of glutamate ionotropic receptor N-methyl d-aspartate 1, calmodulin-dependent protein kinase II (CaMKII) δ, and CaMKIIα was increased, and the expression of CaMKIIγ was decreased in high-frequency group. These genes can activate the calcium (Ca2+)–CaMKII–cAMP-response element-binding protein (CREB) pathway. Furthermore, high-frequency rMS induced phosphorylation of CREB, brain-derived neurotrophic factor (BDNF) transcription via activation of Ca2+–CaMKII–CREB pathway. In conclusion, high-frequency rMS enhances the expression of BDNF by activating Ca2+–CaMKII–CREB pathway in the Neuro-2a cells. These findings may help clarify further therapeutic mechanisms of rTMS.
Collapse
Affiliation(s)
- Ahreum Baek
- Department of Rehabilitation Medicine, Yonsei University Wonju College of Medicine, Wonju, South Korea.,Department and Research Institute of Rehabilitation Medicine, Yonsei University College of Medicine, Seoul, South Korea
| | - Eun Jee Park
- Department of Rehabilitation Medicine, The Graduate School Yonsei University Wonju College of Medicine, Wonju, South Korea
| | - Soo Yeon Kim
- Department of Medicine, Yonsei University Wonju College of Medicine, Wonju, South Korea
| | - Bae-Geun Nam
- Department and Research Institute of Rehabilitation Medicine, Yonsei University College of Medicine, Seoul, South Korea.,Graduate Program of NanoScience and Technology, Yonsei University, Seoul, South Korea
| | - Ji Hyun Kim
- Department of Rehabilitation Medicine, Yonsei University Wonju College of Medicine, Wonju, South Korea
| | - Sang Woo Jun
- Department of Biomedical Clinical Engineering, Yonsei University Wonju College of Medicine, Wonju, South Korea
| | - Sung Hoon Kim
- Department of Rehabilitation Medicine, Yonsei University Wonju College of Medicine, Wonju, South Korea
| | - Sung-Rae Cho
- Department and Research Institute of Rehabilitation Medicine, Yonsei University College of Medicine, Seoul, South Korea.,Graduate Program of NanoScience and Technology, Yonsei University, Seoul, South Korea.,Brain Korea 21 PLUS Project for Medical Science, Yonsei University, Seoul, South Korea.,Yonsei Stem Cell Center, Avison Biomedical Research Center, Yonsei University College of Medicine, Seoul, South Korea.,Rehabilitation Institute of Neuromuscular Disease, Yonsei University College of Medicine, Seoul, South Korea
| |
Collapse
|
9
|
Jia Y, Gan Y, He C, Chen Z, Zhou C. The mechanism of skin lipids influencing skin status. J Dermatol Sci 2017; 89:112-119. [PMID: 29174114 DOI: 10.1016/j.jdermsci.2017.11.006] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Accepted: 11/14/2017] [Indexed: 02/06/2023]
Abstract
Skin lipids, compose of sebocyte-, keratinocyte-, and microbe- derived lipids, dramatically influence skin status by different mechanisms. (I) Physical chemistry function: They are "mortar" to establish the physico-chemical barrier function of skin; (II) Biochemistry function: They function as signals in the complex signaling network originating at the epidermal level; (III) Microecology function: Sebocyte- and keratinocyte-derived lipids vary the composition of microbial skin flora, and microorganisms metabolize them to produce lipids as signal starting signaling transduction. Importantly, further research needs lipidiomics, more powerful analytical ability and high-throughput manner, to identify skin lipid components into individual species. The validation of lipid structure and function to research the process that lipid species involved in. Additional, the integration of lipidomics data with other omics strategies can develop the power to study the mechanism of skin lipids influencing skin status.
Collapse
Affiliation(s)
- Yan Jia
- Beijing Key Laboratory of Plant Resources Research and Development, School of Science, Beijing Technology and Business University, Beijing 100048, China.
| | - Yao Gan
- Beijing Key Laboratory of Plant Resources Research and Development, School of Science, Beijing Technology and Business University, Beijing 100048, China
| | - Congfen He
- Beijing Key Laboratory of Plant Resources Research and Development, School of Science, Beijing Technology and Business University, Beijing 100048, China
| | - Zhou Chen
- Department of Dermatology, Peking University People's Hospital, Beijing, China
| | - Cheng Zhou
- Department of Dermatology, Peking University People's Hospital, Beijing, China
| |
Collapse
|
10
|
Boyden LM, Vincent NG, Zhou J, Hu R, Craiglow BG, Bayliss SJ, Rosman IS, Lucky AW, Diaz LA, Goldsmith LA, Paller AS, Lifton RP, Baserga SJ, Choate KA. Mutations in KDSR Cause Recessive Progressive Symmetric Erythrokeratoderma. Am J Hum Genet 2017; 100:978-984. [PMID: 28575652 DOI: 10.1016/j.ajhg.2017.05.003] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2017] [Accepted: 05/08/2017] [Indexed: 11/18/2022] Open
Abstract
The discovery of new genetic determinants of inherited skin disorders has been instrumental to the understanding of epidermal function, differentiation, and renewal. Here, we show that mutations in KDSR (3-ketodihydrosphingosine reductase), encoding an enzyme in the ceramide synthesis pathway, lead to a previously undescribed recessive Mendelian disorder in the progressive symmetric erythrokeratoderma spectrum. This disorder is characterized by severe lesions of thick scaly skin on the face and genitals and thickened, red, and scaly skin on the hands and feet. Although exome sequencing revealed several of the KDSR mutations, we employed genome sequencing to discover a pathogenic 346 kb inversion in multiple probands, and cDNA sequencing and a splicing assay established that two mutations, including a recurrent silent third base change, cause exon skipping. Immunohistochemistry and yeast complementation studies demonstrated that the mutations cause defects in KDSR function. Systemic isotretinoin therapy has achieved nearly complete resolution in the two probands in whom it has been applied, consistent with the effects of retinoic acid on alternative pathways for ceramide generation.
Collapse
Affiliation(s)
- Lynn M Boyden
- Department of Genetics, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Nicholas G Vincent
- Department of Microbiology, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Jing Zhou
- Department of Dermatology, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Ronghua Hu
- Department of Dermatology, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Brittany G Craiglow
- Department of Dermatology, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Susan J Bayliss
- Division of Dermatology, Washington University School of Medicine, Saint Louis, MO 63110, USA
| | - Ilana S Rosman
- Division of Dermatology, Washington University School of Medicine, Saint Louis, MO 63110, USA
| | - Anne W Lucky
- Dermatologists of Southwest Ohio, Cincinnatti, OH 45247, USA
| | - Luis A Diaz
- Department of Dermatology, University of North Carolina School of Medicine, Chapel Hill, NC 27516, USA
| | - Lowell A Goldsmith
- Department of Dermatology, University of North Carolina School of Medicine, Chapel Hill, NC 27516, USA
| | - Amy S Paller
- Department of Dermatology, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA
| | - Richard P Lifton
- Department of Genetics, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Susan J Baserga
- Department of Genetics, Yale University School of Medicine, New Haven, CT 06510, USA; Department of Therapeutic Radiology, Yale University School of Medicine, New Haven, CT 06510, USA; Department of Molecular Biophysics and Biochemistry, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Keith A Choate
- Department of Genetics, Yale University School of Medicine, New Haven, CT 06510, USA; Department of Dermatology, Yale University School of Medicine, New Haven, CT 06510, USA; Department of Pathology, Yale University School of Medicine, New Haven, CT 06510, USA.
| |
Collapse
|
11
|
Garcia-Gil M, Pierucci F, Vestri A, Meacci E. Crosstalk between sphingolipids and vitamin D3: potential role in the nervous system. Br J Pharmacol 2017; 174:605-627. [PMID: 28127747 DOI: 10.1111/bph.13726] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Revised: 12/16/2016] [Accepted: 01/18/2017] [Indexed: 12/14/2022] Open
Abstract
Sphingolipids are both structural and bioactive compounds. In particular, ceramide and sphingosine 1-phosphate regulate cell fate, inflammation and excitability. 1-α,25-dihydroxyvitamin D3 (1,25(OH)2 D3 ) is known to play an important physiological role in growth and differentiation in a variety of cell types, including neural cells, through genomic actions mediated by its specific receptor, and non-genomic effects that result in the activation of specific signalling pathways. 1,25(OH)2 D3 and sphingolipids, in particular sphingosine 1-phosphate, share many common effectors, including calcium regulation, growth factors and inflammatory cytokines, but it is still not known whether they can act synergistically. Alterations in the signalling and concentrations of sphingolipids and 1,25(OH)2 D3 have been found in neurodegenerative diseases and fingolimod, a structural analogue of sphingosine, has been approved for the treatment of multiple sclerosis. This review, after a brief description of the role of sphingolipids and 1,25(OH)2 D3 , will focus on the potential crosstalk between sphingolipids and 1,25(OH)2 D3 in neural cells.
Collapse
Affiliation(s)
- Mercedes Garcia-Gil
- Department of Biology, University of Pisa, Pisa, Italy.,Interdepartmental Research Center Nutrafood 'Nutraceuticals and Food for Health', University of Pisa, Pisa, Italy
| | - Federica Pierucci
- Department of Experimental and Clinical Biomedical Sciences 'Mario Serio', Molecular and Applied Biology Research Unit, University of Florence, Florence, Italy.,Interuniversitary Miology Institutes, Italy
| | - Ambra Vestri
- Department of Experimental and Clinical Biomedical Sciences 'Mario Serio', Molecular and Applied Biology Research Unit, University of Florence, Florence, Italy.,Interuniversitary Miology Institutes, Italy
| | - Elisabetta Meacci
- Department of Experimental and Clinical Biomedical Sciences 'Mario Serio', Molecular and Applied Biology Research Unit, University of Florence, Florence, Italy.,Interuniversitary Miology Institutes, Italy
| |
Collapse
|
12
|
Silva DES, Cali MP, Pazin WM, Carlos-Lima E, Salles Trevisan MT, Venâncio T, Arcisio-Miranda M, Ito AS, Carlos RM. Luminescent Ru(II) Phenanthroline Complexes as a Probe for Real-Time Imaging of Aβ Self-Aggregation and Therapeutic Applications in Alzheimer’s Disease. J Med Chem 2016; 59:9215-9227. [DOI: 10.1021/acs.jmedchem.6b01130] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Debora E. S. Silva
- Departamento
de Química, Universidade Federal de São Carlos, São
Carlos, São Paulo 13565-905, Brazil
| | - Mariana P. Cali
- Departamento
de Química, Universidade Federal de São Carlos, São
Carlos, São Paulo 13565-905, Brazil
| | - Wallance M. Pazin
- Departamento de
Física, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, USP, Ribeirão Preto, São Paulo 14040-901, Brazil
| | - Estevão Carlos-Lima
- Departamento
de Biofísica, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, São Paulo 04023-062, Brazil
| | - Maria Teresa Salles Trevisan
- Departamento
de Química Orgânica e Inorgânica, Universidade Federal do Ceará, Ceará Fortaleza, 60451-970, Brazil
| | - Tiago Venâncio
- Departamento
de Química, Universidade Federal de São Carlos, São
Carlos, São Paulo 13565-905, Brazil
| | - Manoel Arcisio-Miranda
- Departamento
de Biofísica, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, São Paulo 04023-062, Brazil
| | - Amando S. Ito
- Departamento de
Física, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, USP, Ribeirão Preto, São Paulo 14040-901, Brazil
| | - Rose M. Carlos
- Departamento
de Química, Universidade Federal de São Carlos, São
Carlos, São Paulo 13565-905, Brazil
| |
Collapse
|
13
|
Arastoo M, Hacker C, Popovics P, Lucocq JM, Stewart AJ. Phospholipase C-η2 interacts with nuclear and cytoplasmic LIMK-1 during retinoic acid-stimulated neurite growth. Histochem Cell Biol 2015; 145:163-73. [PMID: 26671787 PMCID: PMC4735258 DOI: 10.1007/s00418-015-1390-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/24/2015] [Indexed: 01/22/2023]
Abstract
Neurite growth is central to the formation and differentiation of functional neurons, and recently, an essential role for phospholipase C-η2 (PLCη2) in neuritogenesis was revealed. Here we investigate the function of PLCη2 in neuritogenesis using Neuro2A cells, which upon stimulation with retinoic acid differentiate and form neurites. We first investigated the role of the PLCη2 calcium-binding EF-hand domain, a domain that is known to be required for PLCη2 activation. To do this, we quantified neurite outgrowth in Neuro2A cells, stably overexpressing wild-type PLCη2 and D256A (EF-hand) and H460Q (active site) PLCη2 mutants. Retinoic acid-induced neuritogenesis was highly dependent on PLCη2 activity, with the H460Q mutant exhibiting a strong dominant-negative effect. Expression of the D256A mutant had little effect on neurite growth relative to the control, suggesting that calcium-directed activation of PLCη2 is not essential to this process. We next investigated which cellular compartments contain endogenous PLCη2 by comparing immunoelectron microscopy signals over control and knockdown cell lines. When signals were analyzed to reveal specific labeling for PLCη2, it was found to be localized predominantly over the nucleus and cytosol. Furthermore in these compartments (and also in growing neurites), a proximity ligand assay revealed that PLCη2 specifically interacts with LIMK-1 in Neuro2A cells. Taken together, these data emphasize the importance of the PLCη2 EF-hand domain and articulation of PLCη2 with LIMK-1 in regulating neuritogenesis.
Collapse
Affiliation(s)
- Mohammed Arastoo
- School of Medicine, Medical and Biological Sciences Building, North Haugh, University of St Andrews, St Andrews, Fife, KY16 9TF, UK
| | - Christian Hacker
- School of Medicine, Medical and Biological Sciences Building, North Haugh, University of St Andrews, St Andrews, Fife, KY16 9TF, UK
- Bioimaging Centre, Geoffrey Pope Building, College of Life and Environmental Sciences, University of Exeter, Exeter, EX4 4QD, UK
| | - Petra Popovics
- School of Medicine, Medical and Biological Sciences Building, North Haugh, University of St Andrews, St Andrews, Fife, KY16 9TF, UK
- Veterans Affairs Medical Center, Miami, FL, 33125, USA
| | - John M Lucocq
- School of Medicine, Medical and Biological Sciences Building, North Haugh, University of St Andrews, St Andrews, Fife, KY16 9TF, UK
| | - Alan J Stewart
- School of Medicine, Medical and Biological Sciences Building, North Haugh, University of St Andrews, St Andrews, Fife, KY16 9TF, UK.
| |
Collapse
|
14
|
TRPM2, a Susceptibility Gene for Bipolar Disorder, Regulates Glycogen Synthase Kinase-3 Activity in the Brain. J Neurosci 2015; 35:11811-23. [PMID: 26311765 DOI: 10.1523/jneurosci.5251-14.2015] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
UNLABELLED Bipolar disorder (BD) is a psychiatric disease that causes mood swings between manic and depressed states. Although genetic linkage studies have shown an association between BD and TRPM2, a Ca(2+)-permeable cation channel, the nature of this association is unknown. Here, we show that D543E, a mutation of Trpm2 that is frequently found in BD patients, induces loss of function. Trpm2-deficient mice exhibited BD-related behavior such as increased anxiety and decreased social responses, along with disrupted EEG functional connectivity. Moreover, the administration of amphetamine in wild-type mice evoked a notable increase in open-field activity that was reversed by the administration of lithium. However, the anti-manic action of lithium was not observed in the Trpm2(-/-) mice. The brains of Trpm2(-/-) mice showed a marked increase in phosphorylated glycogen synthase kinase-3 (GSK-3), a key element in BD-like behavior and a target of lithium. In contrast, activation of TRPM2 induced the dephosphorylation of GSK-3 via calcineurin, a Ca(2+)-dependent phosphatase. Importantly, the overexpression of the D543E mutant failed to induce the dephosphorylation of GSK-3. Therefore, we conclude that the genetic dysfunction of Trpm2 causes uncontrolled phosphorylation of GSK-3, which may lead to the pathology of BD. Our findings explain the long-sought etiologic mechanism underlying the genetic link between Trpm2 mutation and BD. SIGNIFICANCE STATEMENT Bipolar disorder (BD) is a mental disorder that causes changes in mood and the etiology is still unknown. TRPM2 is highly associated with BD; however, its involvement in the etiology of BD is still unknown. We show here that TRPM2 plays a central role in causing the pathology of BD. We found that D543E, a mutation of Trpm2 frequently found in BD patients, induces the loss of function. Trpm2-deficient mice exhibited mood disturbances and impairments in social cognition. TRPM2 actively regulates the phosphorylation of GSK-3, which is a main target of lithium, a primary medicine for treating BD. Therefore, abnormal regulation of GSK-3 by hypoactive TRPM2 mutants accounts for the pathology of BD, providing the possible link between BD and TRPM2.
Collapse
|
15
|
Pritzl CJ, Seo YJ, Xia C, Vijayan M, Stokes ZD, Hahm B. A ceramide analogue stimulates dendritic cells to promote T cell responses upon virus infections. THE JOURNAL OF IMMUNOLOGY 2015; 194:4339-49. [PMID: 25810392 DOI: 10.4049/jimmunol.1402672] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2014] [Accepted: 02/24/2015] [Indexed: 12/20/2022]
Abstract
The ceramide family of lipids plays important roles in both cell structure and signaling in a diverse array of cell types, including immune cells. However, very little is known regarding how ceramide affects the activation of dendritic cells (DCs) in response to viral infection. In this study, we demonstrate that a synthetic ceramide analog (C8) stimulates DCs to increase the expansion of virus-specific T cells upon virus infection. Exogenously supplied C8 ceramide elevated the expression of DC maturation markers such as MHC class I and costimulatory molecules following infection with the clone 13 strain of lymphocytic choriomeningitis virus (LCMV) or influenza virus. Importantly, ceramide-conditioned, LCMV-infected DCs displayed an increased ability to promote expansion of virus-specific CD8(+) T cells when compared with virus-infected DCs. Furthermore, a locally instilled ceramide analog significantly increased virus-reactive T cell responses in vivo to both LCMV and influenza virus infections. Collectively, these findings provide new insights into ceramide-mediated regulation of DC responses against virus infection and help us establish a foundation for novel immune-stimulatory therapeutics.
Collapse
Affiliation(s)
- Curtis J Pritzl
- Department of Surgery, University of Missouri, Columbia, MO 65212; andDepartment of Molecular Microbiology and Immunology, University of Missouri, Columbia, MO 65212
| | - Young-Jin Seo
- Department of Surgery, University of Missouri, Columbia, MO 65212; andDepartment of Molecular Microbiology and Immunology, University of Missouri, Columbia, MO 65212
| | - Chuan Xia
- Department of Surgery, University of Missouri, Columbia, MO 65212; andDepartment of Molecular Microbiology and Immunology, University of Missouri, Columbia, MO 65212
| | - Madhuvanthi Vijayan
- Department of Surgery, University of Missouri, Columbia, MO 65212; andDepartment of Molecular Microbiology and Immunology, University of Missouri, Columbia, MO 65212
| | - Zachary D Stokes
- Department of Surgery, University of Missouri, Columbia, MO 65212; andDepartment of Molecular Microbiology and Immunology, University of Missouri, Columbia, MO 65212
| | - Bumsuk Hahm
- Department of Surgery, University of Missouri, Columbia, MO 65212; andDepartment of Molecular Microbiology and Immunology, University of Missouri, Columbia, MO 65212
| |
Collapse
|
16
|
Sabourdy F, Astudillo L, Colacios C, Dubot P, Mrad M, Ségui B, Andrieu-Abadie N, Levade T. Monogenic neurological disorders of sphingolipid metabolism. Biochim Biophys Acta Mol Cell Biol Lipids 2015; 1851:1040-51. [PMID: 25660725 DOI: 10.1016/j.bbalip.2015.01.010] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2014] [Revised: 01/10/2015] [Accepted: 01/12/2015] [Indexed: 10/24/2022]
Abstract
Sphingolipids comprise a wide variety of molecules containing a sphingoid long-chain base that can be N-acylated. These lipids are particularly abundant in the central nervous system, being membrane components of neurons as well as non-neuronal cells. Direct evidence that these brain lipids play critical functions in brain physiology is illustrated by the dramatic consequences of genetic disturbances of their metabolism. Inherited defects of both synthesis and catabolism of sphingolipids are now identified in humans. These monogenic disorders are due to mutations in the genes encoding for the enzymes that catalyze either the formation or degradation of simple sphingolipids such as ceramides, or complex sphingolipids like glycolipids. They cause varying degrees of central nervous system dysfunction, quite similarly to the neurological disorders induced in mice by gene disruption of the corresponding enzymes. Herein, the enzyme deficiencies and metabolic alterations that underlie these diseases are reviewed. Their possible pathophysiological mechanisms and the functions played by sphingolipids one can deduce from these conditions are discussed. This article is part of a Special Issue entitled Brain Lipids.
Collapse
Affiliation(s)
- Frédérique Sabourdy
- Institut National de la Santé et de la Recherche Médicale (INSERM) UMR1037, Toulouse, France; Equipe Labellisée Ligue Nationale Contre le Cancer 2013, Centre de Recherches en Cancérologie de Toulouse (CRCT), Université de Toulouse-III Paul Sabatier, Toulouse, France; Laboratoire de Biochimie Métabolique, Institut Fédératif de Biologie, CHU Purpan, Toulouse, France
| | - Leonardo Astudillo
- Institut National de la Santé et de la Recherche Médicale (INSERM) UMR1037, Toulouse, France; Equipe Labellisée Ligue Nationale Contre le Cancer 2013, Centre de Recherches en Cancérologie de Toulouse (CRCT), Université de Toulouse-III Paul Sabatier, Toulouse, France; Service de Médecine Interne, CHU Purpan, Toulouse, France
| | - Céline Colacios
- Institut National de la Santé et de la Recherche Médicale (INSERM) UMR1037, Toulouse, France; Equipe Labellisée Ligue Nationale Contre le Cancer 2013, Centre de Recherches en Cancérologie de Toulouse (CRCT), Université de Toulouse-III Paul Sabatier, Toulouse, France
| | - Patricia Dubot
- Laboratoire de Biochimie Métabolique, Institut Fédératif de Biologie, CHU Purpan, Toulouse, France
| | - Marguerite Mrad
- Institut National de la Santé et de la Recherche Médicale (INSERM) UMR1037, Toulouse, France; Equipe Labellisée Ligue Nationale Contre le Cancer 2013, Centre de Recherches en Cancérologie de Toulouse (CRCT), Université de Toulouse-III Paul Sabatier, Toulouse, France
| | - Bruno Ségui
- Institut National de la Santé et de la Recherche Médicale (INSERM) UMR1037, Toulouse, France; Equipe Labellisée Ligue Nationale Contre le Cancer 2013, Centre de Recherches en Cancérologie de Toulouse (CRCT), Université de Toulouse-III Paul Sabatier, Toulouse, France
| | - Nathalie Andrieu-Abadie
- Institut National de la Santé et de la Recherche Médicale (INSERM) UMR1037, Toulouse, France; Equipe Labellisée Ligue Nationale Contre le Cancer 2013, Centre de Recherches en Cancérologie de Toulouse (CRCT), Université de Toulouse-III Paul Sabatier, Toulouse, France
| | - Thierry Levade
- Institut National de la Santé et de la Recherche Médicale (INSERM) UMR1037, Toulouse, France; Equipe Labellisée Ligue Nationale Contre le Cancer 2013, Centre de Recherches en Cancérologie de Toulouse (CRCT), Université de Toulouse-III Paul Sabatier, Toulouse, France; Laboratoire de Biochimie Métabolique, Institut Fédératif de Biologie, CHU Purpan, Toulouse, France.
| |
Collapse
|
17
|
Dutagaci B, Becker-Baldus J, Faraldo-Gómez JD, Glaubitz C. Ceramide-lipid interactions studied by MD simulations and solid-state NMR. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2014; 1838:2511-9. [PMID: 24882733 DOI: 10.1016/j.bbamem.2014.05.024] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2014] [Revised: 05/20/2014] [Accepted: 05/21/2014] [Indexed: 01/08/2023]
Abstract
Ceramides play a key modulatory role in many cellular processes, which results from their effect on the structure and dynamics of biological membranes. In this study, we investigate the influence of C16-ceramide (C16) on the biophysical properties of DMPC lipid bilayers using solid-state NMR and atomistic molecular dynamics (MD) simulations. MD simulations and NMR measurements were carried out for a pure DMPC bilayer and for a 20% DMPC-C16 mixture. Calculated key structural properties, namely area per lipid, chain order parameters, and mass density profiles, indicate that C16 has an ordering effect on the DMPC bilayer. Furthermore, the simulations predict that specific hydrogen-bonds form between DMPC and C16 molecules. Multi-nuclear solid-state NMR was used to verify these theoretical predictions. Chain order parameters extracted from (13)C(1)H dipole couplings were measured for both lipid and ceramide and follow the trend suggested by the MD simulations. Furthermore, (1)H-MAS NMR experiments showed a direct contact between ceramide and lipids.
Collapse
Affiliation(s)
- Bercem Dutagaci
- Institute of Biophysical Chemistry, J.W. Goethe-University, Max-von-Laue-Str. 9, 60438 Frankfurt, Germany
| | - Johanna Becker-Baldus
- Institute of Biophysical Chemistry, J.W. Goethe-University, Max-von-Laue-Str. 9, 60438 Frankfurt, Germany
| | - José D Faraldo-Gómez
- Theoretical Molecular Biophysics Section, National Heart, Lung & Blood Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Clemens Glaubitz
- Institute of Biophysical Chemistry, J.W. Goethe-University, Max-von-Laue-Str. 9, 60438 Frankfurt, Germany.
| |
Collapse
|
18
|
Noguchi S, Sumida T, Ogawa H, Tada M, Takahata K. Effects of Oxygenated Carotenoid β-Cryptoxanthin on Morphological Differentiation and Apoptosis in Neuro2a Neuroblastoma Cells. Biosci Biotechnol Biochem 2014; 67:2467-9. [PMID: 14646211 DOI: 10.1271/bbb.67.2467] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Beta-Cryptoxanthin (beta Cx) was investigated for cell functions in neuroblastoma Neuro2a cells. The following results were obtained. 1. Beta-Cx induced neurite outgrowth. 2. Beta-Cx inhibited the etoposide-induced activation of caspase-3 activity in a dose-dependent manner. These data suggest a bioregulatry function of beta Cx in the control of differentiation and apoptosis in Neuro2a cells.
Collapse
Affiliation(s)
- Satoko Noguchi
- Graduate School of Natural Science and Technology, Okayama University, Japan
| | | | | | | | | |
Collapse
|
19
|
Tsioras K, Papastefanaki F, Politis PK, Matsas R, Gaitanou M. Functional Interactions between BM88/Cend1, Ran-binding protein M and Dyrk1B kinase affect cyclin D1 levels and cell cycle progression/exit in mouse neuroblastoma cells. PLoS One 2013; 8:e82172. [PMID: 24312406 PMCID: PMC3842983 DOI: 10.1371/journal.pone.0082172] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2013] [Accepted: 10/31/2013] [Indexed: 12/22/2022] Open
Abstract
BM88/Cend1 is a neuronal-lineage specific modulator with a pivotal role in coordination of cell cycle exit and differentiation of neuronal precursors. In the current study we identified the signal transduction scaffolding protein Ran-binding protein M (RanBPM) as a BM88/Cend1 binding partner and showed that BM88/Cend1, RanBPM and the dual specificity tyrosine-phosphorylation regulated kinase 1B (Dyrk1B) are expressed in mouse brain as well as in cultured embryonic cortical neurons while RanBPM can form complexes with either of the two other proteins. To elucidate a potential mechanism involving BM88/Cend1, RanBPM and Dyrk1B in cell cycle progression/exit, we transiently co-expressed these proteins in mouse neuroblastoma Neuro 2a cells. We found that the BM88/Cend1-dependent or Dyrk1B-dependent down-regulation of cyclin D1 is reversed following their functional interaction with RanBPM. More specifically, functional interaction of RanBPM with either BM88/Cend1 or Dyrk1B stabilizes cyclin D1 in the nucleus and promotes 5-bromo-2'-deoxyuridine (BrdU) incorporation as a measure of enhanced cell proliferation. However, the RanBPM-dependent Dyrk1B cytosolic retention and degradation is reverted in the presence of Cend1 resulting in cyclin D1 destabilization. Co-expression of RanBPM with either BM88/Cend1 or Dyrk1B also had a negative effect on Neuro 2a cell differentiation. Our results suggest that functional interactions between BM88/Cend1, RanBPM and Dyrk1B affect the balance between cellular proliferation and differentiation in Neuro 2a cells and indicate that a potentially similar mechanism may influence cell cycle progression/exit and differentiation of neuronal precursors.
Collapse
Affiliation(s)
- Konstantinos Tsioras
- Laboratory of Cellular and Molecular Neurobiology, Hellenic Pasteur Institute, Athens, Greece
| | - Florentia Papastefanaki
- Laboratory of Cellular and Molecular Neurobiology, Hellenic Pasteur Institute, Athens, Greece
| | - Panagiotis K. Politis
- Center for Basic Research, Biomedical Research Foundation, Academy of Athens, Athens, Greece
| | - Rebecca Matsas
- Laboratory of Cellular and Molecular Neurobiology, Hellenic Pasteur Institute, Athens, Greece
| | - Maria Gaitanou
- Laboratory of Cellular and Molecular Neurobiology, Hellenic Pasteur Institute, Athens, Greece
| |
Collapse
|
20
|
Uchida Y. Ceramide signaling in mammalian epidermis. Biochim Biophys Acta Mol Cell Biol Lipids 2013; 1841:453-62. [PMID: 24055887 DOI: 10.1016/j.bbalip.2013.09.003] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2013] [Revised: 09/05/2013] [Accepted: 09/06/2013] [Indexed: 12/12/2022]
Abstract
Ceramide, the backbone structure of all sphingolipids, as well as a minor component of cellular membranes, has a unique role in the skin, by forming the epidermal permeability barrier at the extracellular domains of the outermost layer of the skin, the stratum corneum, which is required for terrestrial mammalian survival. In contrast to the role of ceramide in forming the permeability barrier, the signaling roles of ceramide and its metabolites have not yet been recognized. Ceramide and/or its metabolites regulate proliferation, differentiation, and apoptosis in epidermal keratinocytes. Recent studies have further demonstrated that a ceramide metabolite, sphingosine-1-phosphate, modulates innate immune function. Ceramide has already been applied to therapeutic approaches for treatment of eczema associated with attenuated epidermal permeability barrier function. Pharmacological modulation of ceramide and its metabolites' signaling can also be applied to cutaneous disease prevention and therapy. The author here describes the signaling roles of ceramide and its metabolites in mammalian cells and tissues, including the epidermis. This article is part of a Special Issue entitled The Important Role of Lipids in the Epidermis and their Role in the Formation and Maintenance of the Cutaneous Barrier. Guest Editors: Kenneth R. Feingold and Peter Elias.
Collapse
Affiliation(s)
- Yoshikazu Uchida
- Department of Dermatology, University of California, San Francisco, CA, USA; School of Medicine, University of California, San Francisco, CA, USA; Dermatology Service and Research Unit, Veterans Affairs Medical Center, San Francisco, CA, USA; Northern California Institute for Research and Education, San Francisco, CA, USA.
| |
Collapse
|
21
|
Georganta EM, Tsoutsi L, Gaitanou M, Georgoussi Z. δ-opioid receptor activation leads to neurite outgrowth and neuronal differentiation via a STAT5B-Gαi/o pathway. J Neurochem 2013; 127:329-41. [DOI: 10.1111/jnc.12386] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2013] [Revised: 06/27/2013] [Accepted: 07/29/2013] [Indexed: 12/25/2022]
Affiliation(s)
- Eirini-Maria Georganta
- Laboratory of Cellular Signalling and Molecular Pharmacology; Institute of Biosciences and Applications; National Centre for Scientific Research “Demokritos”; Athens Greece
| | - Lambrini Tsoutsi
- Laboratory of Cellular Signalling and Molecular Pharmacology; Institute of Biosciences and Applications; National Centre for Scientific Research “Demokritos”; Athens Greece
| | - Maria Gaitanou
- Laboratory of Cellular and Molecular Neurobiology; Hellenic Pasteur Institute; Athens Greece
| | - Zafiroula Georgoussi
- Laboratory of Cellular Signalling and Molecular Pharmacology; Institute of Biosciences and Applications; National Centre for Scientific Research “Demokritos”; Athens Greece
| |
Collapse
|
22
|
Kawaminami S, Breakspear S, Saga Y, Noecker B, Masukawa Y, Tsuchiya M, Oguri M, Inoue Y, Ishikawa K, Okamoto M. Deletion of theSox21gene drastically affects hair lipids. Exp Dermatol 2012; 21:974-6. [DOI: 10.1111/exd.12050] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/10/2012] [Indexed: 01/26/2023]
Affiliation(s)
- Shunro Kawaminami
- Analytical Science Research Laboratories; Kao Corporation; Tochigi; Japan
| | | | - Yumiko Saga
- Division of Mammalian Development; National Institute of Genetics; Shizuoka; Japan
| | | | - Yoshinori Masukawa
- Analytical Science Research Laboratories; Kao Corporation; Tochigi; Japan
| | | | - Masashi Oguri
- Analytical Science Research Laboratories; Kao Corporation; Tochigi; Japan
| | - Yosuke Inoue
- Analytical Science Research Laboratories; Kao Corporation; Tochigi; Japan
| | - Kazutaka Ishikawa
- Analytical Science Research Laboratories; Kao Corporation; Wakayama; Japan
| | - Masayuki Okamoto
- Analytical Science Research Laboratories; Kao Corporation; Wakayama; Japan
| |
Collapse
|
23
|
Tanaka K, Tamiya-Koizumi K, Hagiwara K, Ito H, Takagi A, Kojima T, Suzuki M, Iwaki S, Fujii S, Nakamura M, Banno Y, Kannagi R, Tsurumi T, Kyogashima M, Murate T. Role of down-regulated neutral ceramidase during all-trans retinoic acid-induced neuronal differentiation in SH-SY5Y neuroblastoma cells. ACTA ACUST UNITED AC 2012; 151:611-20. [DOI: 10.1093/jb/mvs033] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
|
24
|
Xu H, Bae M, Tovar-y-Romo LB, Patel N, Bandaru VVR, Pomerantz D, Steiner JP, Haughey NJ. The human immunodeficiency virus coat protein gp120 promotes forward trafficking and surface clustering of NMDA receptors in membrane microdomains. J Neurosci 2011; 31:17074-90. [PMID: 22114277 PMCID: PMC3254245 DOI: 10.1523/jneurosci.4072-11.2011] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2011] [Revised: 09/28/2011] [Accepted: 09/29/2011] [Indexed: 11/21/2022] Open
Abstract
Infection by the human immunodeficiency virus (HIV) can result in debilitating neurological syndromes collectively known as HIV-associated neurocognitive disorders. Although the HIV coat protein gp120 has been identified as a potent neurotoxin that enhances NMDA receptor function, the exact mechanisms for this effect are not known. Here we provide evidence that gp120 activates two separate signaling pathways that converge to enhance NMDA-evoked calcium flux by clustering NMDA receptors in modified membrane microdomains. gp120 enlarged and stabilized the structure of lipid microdomains on dendrites by mechanisms that involved a redox-regulated translocation of a sphingomyelin hydrolase (neutral sphingomyelinase-2) to the plasma membrane. A concurrent pathway was activated that accelerated the forward traffic of NMDA receptors by a PKA-dependent phosphorylation of the NR1 C-terminal serine 897 (masks an ER retention signal), followed by a PKC-dependent phosphorylation of serine 896 (important for surface expression). NMDA receptors were preferentially targeted to synapses and clustered in modified membrane microdomains. In these conditions, NMDA receptors were unable to laterally disperse and did not internalize, even in response to strong agonist induction. Focal NMDA-evoked calcium bursts were enhanced by threefold in these regions. Inhibiting membrane modification or NR1 phosphorylation prevented gp120 from accelerating the surface localization of NMDA receptors. Disrupting the structure of membrane microdomains after gp120 treatments restored the ability of NMDA receptors to disperse and internalize. These findings demonstrate that gp120 contributes to synaptic dysfunction in the setting of HIV infection by interfering with NMDA receptor trafficking.
Collapse
Affiliation(s)
- Hangxiu Xu
- Departments of Neurology, Richard T. Johnson Division of Neuroimmunology and Neurological Infections and
| | - Mihyun Bae
- Departments of Neurology, Richard T. Johnson Division of Neuroimmunology and Neurological Infections and
| | - Luis B. Tovar-y-Romo
- Departments of Neurology, Richard T. Johnson Division of Neuroimmunology and Neurological Infections and
| | - Neha Patel
- Departments of Neurology, Richard T. Johnson Division of Neuroimmunology and Neurological Infections and
| | | | - Daniel Pomerantz
- Departments of Neurology, Richard T. Johnson Division of Neuroimmunology and Neurological Infections and
| | - Joseph P. Steiner
- Departments of Neurology, Richard T. Johnson Division of Neuroimmunology and Neurological Infections and
| | - Norman J. Haughey
- Departments of Neurology, Richard T. Johnson Division of Neuroimmunology and Neurological Infections and
- Psychiatry, The Johns Hopkins University School of Medicine, Baltimore, Maryland 21287
| |
Collapse
|
25
|
Choi JM, Chu SJ, Ahn KH, Kim SK, Ji JE, Won JH, Kim HC, Back MJ, Kim DK. C(6)-ceramide enhances phagocytic activity of Kupffer cells through the production of endogenous ceramides. Mol Cells 2011; 32:325-31. [PMID: 21874540 PMCID: PMC3887646 DOI: 10.1007/s10059-011-1034-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2011] [Revised: 06/15/2011] [Accepted: 07/11/2011] [Indexed: 12/11/2022] Open
Abstract
Ceramide has been suggested to be not only a tumor-suppressive lipid but also a regulator of phagocytosis. We examined whether exogenous cell-permeable C(6)-ceramide enhances the phagocytic activity of Kupffer cells (KCs) and affects the level of cellular ceramides. Rat KCs were isolated by collagenase digestion and differential centrifugation, using Percoll system. Phagocytic activity was measured by FACS analysis after incubating KCs with fluorescence-conjugated latex beads, and the level of cellular ceramide was analyzed by liquid chromatography tandem-mass spectrometry (LC-MS/MS). In this study we found that permeable C(6)-ceramide increases the cellular levels of endogenous ceramides via a sphingosine-recycling pathway leading to enhanced phagocytosis by KCs.
Collapse
Affiliation(s)
- Jong Min Choi
- Department of Environmental and Health Chemistry, College of Pharmacy, Chung-Ang University, Seoul 156-756, Korea
- These authors contributed equally to this work
| | - So Jung Chu
- Department of Environmental and Health Chemistry, College of Pharmacy, Chung-Ang University, Seoul 156-756, Korea
- These authors contributed equally to this work
| | - Kyong Hoon Ahn
- Department of Environmental and Health Chemistry, College of Pharmacy, Chung-Ang University, Seoul 156-756, Korea
| | - Seok Kyun Kim
- Department of Environmental and Health Chemistry, College of Pharmacy, Chung-Ang University, Seoul 156-756, Korea
| | - Jung Eun Ji
- Department of Environmental and Health Chemistry, College of Pharmacy, Chung-Ang University, Seoul 156-756, Korea
| | - Jong Hoon Won
- Department of Environmental and Health Chemistry, College of Pharmacy, Chung-Ang University, Seoul 156-756, Korea
| | - Hyung Chul Kim
- Department of Environmental and Health Chemistry, College of Pharmacy, Chung-Ang University, Seoul 156-756, Korea
| | - Moon Jung Back
- Department of Environmental and Health Chemistry, College of Pharmacy, Chung-Ang University, Seoul 156-756, Korea
| | - Dae Kyong Kim
- Department of Environmental and Health Chemistry, College of Pharmacy, Chung-Ang University, Seoul 156-756, Korea
| |
Collapse
|
26
|
Yamane M, Miyazawa K, Moriya S, Abe A, Yamane S. D,L-Threo-1-phenyl-2-decanoylamino-3-morpholino-1-propanol (DL-PDMP) increases endoplasmic reticulum stress, autophagy and apoptosis accompanying ceramide accumulation via ceramide synthase 5 protein expression in A549 cells. Biochimie 2011; 93:1446-59. [DOI: 10.1016/j.biochi.2011.04.016] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2010] [Accepted: 04/20/2011] [Indexed: 11/26/2022]
|
27
|
Paintlia AS, Paintlia MK, Singh AK, Orak JK, Singh I. Activation of PPAR-γ and PTEN cascade participates in lovastatin-mediated accelerated differentiation of oligodendrocyte progenitor cells. Glia 2011; 58:1669-85. [PMID: 20578043 DOI: 10.1002/glia.21039] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Previously, we and others documented that statins including-lovastatin (LOV) promote the differentiation of oligodendrocyte progenitor cells (OPCs) and remyelination in experimental autoimmune encephalomyelitis (EAE), an multiple sclerosis (MS) model. Conversely, some recent studies demonstrated that statins negatively influence oligodendrocyte (OL) differentiation in vitro and remyelination in a cuprizone-CNS demyelinating model. Therefore, herein, we first investigated the cause of impaired differentiation of OLs by statins in vitro settings. Our observations indicated that the depletion of cholesterol was detrimental to LOV treated OPCs under cholesterol/serum-deprived culture conditions similar to that were used in conflicting studies. However, the depletion of geranylgeranyl-pp under normal cholesterol homeostasis conditions enhanced the phenotypic commitment and differentiation of LOV-treated OPCs ascribed to inhibition of RhoA-Rho kinase. Interestingly, this effect of LOV was associated with increased activation and expression of both PPAR-γ and PTEN in OPCs as confirmed by various pharmacological and molecular based approaches. Furthermore, PTEN was involved in an inhibition of OPCs proliferation via PI3K-Akt inhibition and induction of cell cycle arrest at G1 phase, but without affecting their cell survival. These effects of LOV on OPCs in vitro were absent in the CNS of normal rats chronically treated with LOV concentrations used in EAE indicating that PPAR-γ induction in normal brain may be tightly regulated-providing evidences that statins are therapeutically safe for humans. Collectively, these data provide initial evidence that statin-mediated activation of the PPAR-γ-PTEN cascade participates in OL differentiation, thus suggesting new therapeutic-interventions for MS or related CNS-demyelinating diseases.
Collapse
Affiliation(s)
- Ajaib S Paintlia
- Department of Pediatrics, Darby Children's Research Institute, Medical University of South Carolina, South Carolina, USA
| | | | | | | | | |
Collapse
|
28
|
Beuster G, Zarse K, Kaleta C, Thierbach R, Kiehntopf M, Steinberg P, Schuster S, Ristow M. Inhibition of alanine aminotransferase in silico and in vivo promotes mitochondrial metabolism to impair malignant growth. J Biol Chem 2011; 286:22323-30. [PMID: 21540181 PMCID: PMC3121379 DOI: 10.1074/jbc.m110.205229] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Cancer cells commonly exhibit increased nonoxidative d-glucose metabolism whereas induction of mitochondrial metabolism may impair malignant growth. We have first used an in silico method called elementary mode analysis to identify inhibition of ALAT (l-alanine aminotransferase) as a putative target to promote mitochondrial metabolism. We then experimentally show that two competitive inhibitors of ALAT, l-cycloserine and β-chloro-l-alanine, inhibit l-alanine production and impair d-glucose uptake of LLC1 Lewis lung carcinoma cells. The latter inhibition is linked to an initial energy deficit, as quantified by decreased ATP content, which is then followed by an activation of AMP-activated protein kinase and subsequently increased respiration rates and mitochondrial production of reactive oxygen species, culminating in ATP replenishment in ALAT-inhibited LLC1 cells. Moreover, we observe altered phosphorylation of p38 MAPK (mitogen-activated protein kinase 14), ERK (extracellular signal-regulated kinase 1/2), and Rb1 (retinoblastoma 1) proteins, as well as decreased expression of Cdc25a (cell decision cycle 25 homolog A) and Cdk4 (cyclin-dependent kinase 4). Importantly, these sequelae of ALAT inhibition culminate in similarly reduced anchorage-dependent and anchorage-independent growth rates of LLC1 cells, together suggesting that inhibition of ALAT efficiently impairs cancer growth by counteracting the Warburg effect due to compensatory activation of mitochondrial metabolism.
Collapse
Affiliation(s)
- Gregor Beuster
- Department of Human Nutrition, Institute of Nutrition, University of Jena, Jena D-07743, Germany
| | | | | | | | | | | | | | | |
Collapse
|
29
|
Lee JH, Jang S, Jeong HS, Park JS. Effects of sphingosine-1-phosphate on neural differentiation and neurite outgrowth in neuroblastoma cells. Chonnam Med J 2011; 47:27-30. [PMID: 22111053 PMCID: PMC3214862 DOI: 10.4068/cmj.2011.47.1.27] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2010] [Accepted: 03/16/2011] [Indexed: 11/29/2022] Open
Abstract
Sphingosine-1-phosphate (S1P) is emerging as a new class of second messenger involved in cellular proliferation, differentiation, and apoptosis and is implicated in diverse physiological functions. Despite many studies on the biological functions of S1P, however, little is known about its role in neuronal differentiation. By use of reverse transcription-polymerase chain reaction and immunostaining, this study aimed to explore whether S1P can differentiate neuroblastoma cells into neural cells. After incubation with 1 uM or 10 uM S1P, the number of neurite-bearing cells increased. Furthermore, the neuroblastoma cells revealed immunoreactivity for neural-specific markers such as GAP43, NFH, and SYP by immunostaining. The expression of NFH, MAP2, SYP, NeuroD1, and SYT mRNA, which is specific for neurons, was increased as shown by RT-PCR studies. The results of this study suggest that that S1P can induce neuronal differentiation and may be a good candidate for the treatment of neurodegenerative diseases.
Collapse
Affiliation(s)
- Jae-Hyuk Lee
- Department of Pathology, Chonnam National University Medical School, Gwangju, Korea
| | | | | | | |
Collapse
|
30
|
Ji JE, Kim SK, Ahn KH, Choi JM, Jung SY, Jung KM, Jeon HJ, Kim DK. Ceramide induces serotonin release from RBL-2H3 mast cells through calcium mediated activation of phospholipase A2. Prostaglandins Other Lipid Mediat 2011; 94:88-95. [DOI: 10.1016/j.prostaglandins.2011.01.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2010] [Revised: 12/28/2010] [Accepted: 01/04/2011] [Indexed: 11/30/2022]
|
31
|
van Smeden J, Hoppel L, van der Heijden R, Hankemeier T, Vreeken RJ, Bouwstra JA. LC/MS analysis of stratum corneum lipids: ceramide profiling and discovery. J Lipid Res 2011; 52:1211-1221. [PMID: 21444759 DOI: 10.1194/jlr.m014456] [Citation(s) in RCA: 173] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Ceramides (CERs) in the upper layer of the skin, the stratum corneum (SC), play a key role in the skin barrier function. In human SC, the literature currently reports 11 CER subclasses that have been identified. In this paper, a novel quick and robust LC/MS method is presented that allows the separation and analysis of all known human SC CER subclasses using only limited sample preparation. Besides all 11 known and identified subclasses, a 3D multi-mass chromatogram shows the presence of other lipid subclasses. Using LC/MS/MS with an ion trap (IT) system, a Fourier transform-ion cyclotron resonance system, and a triple quadrupole system, we were able to identify one of these lipid subclasses as a new CER subclass: the ester-linked ω-hydroxy fatty acid with a dihydrosphingosine base (CER [EOdS]). Besides the identification of a new CER subclass, this paper also describes the applicability and robustness of the developed LC/MS method by analyzing three (biological) SC samples: SC from human dermatomed skin, human SC obtained by tape stripping, and SC from full-thickness skin explants. All three biological samples showed all known CER subclasses and slight differences were observed in CER profile.
Collapse
Affiliation(s)
- Jeroen van Smeden
- Division of Drug Delivery Technology, Leiden/Amsterdam Center for Drug Research, Leiden, The Netherlands
| | - Louise Hoppel
- Division of Analytical Biosciences, Leiden/Amsterdam Center for Drug Research, Leiden, The Netherlands
| | - Rob van der Heijden
- Division of Analytical Biosciences, Leiden/Amsterdam Center for Drug Research, Leiden, The Netherlands
| | - Thomas Hankemeier
- Division of Analytical Biosciences, Leiden/Amsterdam Center for Drug Research, Leiden, The Netherlands; Netherlands Metabolomics Centre, Leiden/Amsterdam Center for Drug Research, Leiden, The Netherlands
| | - Rob J Vreeken
- Division of Analytical Biosciences, Leiden/Amsterdam Center for Drug Research, Leiden, The Netherlands; Netherlands Metabolomics Centre, Leiden/Amsterdam Center for Drug Research, Leiden, The Netherlands
| | - Joke A Bouwstra
- Division of Drug Delivery Technology, Leiden/Amsterdam Center for Drug Research, Leiden, The Netherlands.
| |
Collapse
|
32
|
Sphingolipid metabolism and analysis in metabolic disease. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2011; 721:1-17. [PMID: 21910079 DOI: 10.1007/978-1-4614-0650-1_1] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
Abstract
Sphingolipids are an important class of structural and signaling molecules within the cell. As sphingolipids have been implicated in the development and pathogenesis of insulin resistance and the metabolic syndrome, it is important to understand their regulation and metabolism. Although these lipids are initially produced through a common pathway, there is no "generic" sphingolipid. Indeed, the biophysical and signaling properties of lipids may be manipulated by the subunit composition or isoform of their synthetic enzymes, via regulation of substrate integration. Functionally distinct pools of chemically-equivalent lipids may also be generated by de novo synthesis and recycling of existing complex sphingolipids. The highly integrated metabolism of the many bioactive sphingolipids means that manipulation of one enzyme or metabolite can result in a ripple effect, causing unforeseen changes in metabolite levels, enzyme activities, and cellular programmes. Fortunately, a suite of techniques, ranging from thin-layer chromatography to liquid chromatography-mass spectrometry approaches, allows investigators to undertake a functional characterization of all or part of the sphingolipidome in their systems of interest.
Collapse
|
33
|
Ueda O, Uchiyama T, Nakashima M. Distribution and metabolism of sphingosine in skin after oral administration to mice. Drug Metab Pharmacokinet 2010; 25:456-65. [PMID: 20877136 DOI: 10.2133/dmpk.dmpk-10-rg-038] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In this study, (3)H- or (13)C(2),D(2)-sphingosine (SPH) was orally administered to mice to assess absorption, mass balance, tissue distribution, and metabolites in the skin. The blood concentration of (3)H-SPH showed a Tmax of 10.7 hr. The radioactivity in the skin reached 763.4 ng eq./g tissue at 12 hr, and decreased to 181.7 ng eq./g tissue at 168 hr. The concentration of radioactivity at 12 hr was 577.6 and 100.7 ng eq./g tissue in the dermis and epidermis, respectively. Thereafter, the dermis concentration decreased to 158.5 ng eq./g tissue, while the epidermis concentration increased to 298.8 ng eq./g tissue, suggesting that radioactivity moves from the dermis to the epidermis. Unchanged SPH along with lipophilic metabolites was detected in the skin of mice exposed orally to (3)H- or (13)C(2),D(2)-SPH. Moreover, in an in vitro study using human skin keratinocytes, a (13)C(2),D(2)-SPH-treatment resulted in the intracellular production of glucosylceramides (GlcCer) and ceramides (Cer) containing labeled-SPH. These results indicate the followings: first, that SPH is absorbed through the digestive tract and distributed to the skin; second, it is transferred from the dermis to the epidermis; and third, SPH is partly distributed to the skin in an unchanged form, and some of the distributed compounds are converted into GlcCer and Cer by biosynthesis.
Collapse
Affiliation(s)
- Osamu Ueda
- Functional Food Research & Development Center, Shiseido Co., Ltd, Yokohama, Japan. osamu.ueda@to.shiseido.co.jp
| | | | | |
Collapse
|
34
|
Rotstein NP, Miranda GE, Abrahan CE, German OL. Regulating survival and development in the retina: key roles for simple sphingolipids. J Lipid Res 2010; 51:1247-62. [PMID: 20100817 PMCID: PMC3035489 DOI: 10.1194/jlr.r003442] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2009] [Revised: 01/25/2010] [Indexed: 12/28/2022] Open
Abstract
Many sphingolipids have key functions in the regulation of crucial cellular processes. Ceramide (Cer) and sphingosine (Sph) induce growth arrest and cell death in multiple situations of cellular stress. On the contrary, sphingosine-1-phosphate (S1P), the product of Sph phosphorylation, promotes proliferation, differentiation, and survival in different cell systems. This review summarizes the roles of these simple sphingolipids in different tissues and then analyzes their possible functions in the retina. Alterations in proliferation, neovascularization, differentiation, and cell death are critical in major retina diseases and collective evidence points to a role for sphingolipids in these processes. Cer induces inflammation and apoptosis in endothelial and retinal pigmented epithelium cells, leading to several retinopathies. S1P can prevent this death but also promotes cell proliferation that might lead to neovascularization and fibrosis. Recent data support Cer and Sph as crucial mediators in the induction of photoreceptor apoptosis in diverse models of oxidative damage and neurodegeneration, and suggest that regulating their metabolism can prevent this death. New evidence proposes a central role for S1P controlling photoreceptor survival and differentiation. Finally, this review discusses the ability of trophic factors to regulate sphingolipid metabolism and transactivate S1P signaling pathways to control survival and development in retina photoreceptors.
Collapse
Affiliation(s)
- Nora P Rotstein
- Instituto de Investigaciones Bioquímicas de Bahía Blanca, Universidad Nacional del Sur-CONICET, Bahía Blanca, Buenos Aires, Argentina.
| | | | | | | |
Collapse
|
35
|
Mencarelli C, Losen M, Hammels C, De Vry J, Hesselink MKC, Steinbusch HWM, De Baets MH, Martínez-Martínez P. The ceramide transporter and the Goodpasture antigen binding protein: one protein--one function? J Neurochem 2010; 113:1369-86. [PMID: 20236389 DOI: 10.1111/j.1471-4159.2010.06673.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The Goodpasture antigen-binding protein (GPBP) and its splice variant the ceramide transporter (CERT) are multifunctional proteins that have been found to play important roles in brain development and biology. However, the function of GPBP and CERT is controversial because of their involvement in two apparently unrelated research fields: GPBP was initially isolated as a protein associated with collagen IV in patients with the autoimmune disease Goodpasture syndrome. Subsequently, a splice variant lacking a serine-rich domain of 26 amino acids (GPBPDelta26) was found to mediate the cytosolic transport of ceramide and was therefore (re)named CERT. The two splice forms likely carry out different functions in specific sub-cellular localizations. Selective GPBP knockdown induces extensive apoptosis and tissue loss in the brain of zebrafish. GPBP/GPBPDelta26 knock-out mice die as a result of structural and functional defects in endoplasmic reticulum and mitochondria. Because both mitochondria and ceramide play an important role in many biological events that regulate neuronal differentiation, cellular senescence, proliferation and cell death, we propose that GPBP and CERT are pivotal in neurodegenerative processes. In this review, we discuss the current state of knowledge on GPBP and CERT, including the molecular and biochemical characterization of GPBP in the field of autoimmunity as well as the fundamental research on CERT in ceramide transport, biosynthesis, localization, metabolism and cell homeostasis.
Collapse
Affiliation(s)
- Chiara Mencarelli
- Department of Neuroscience, School for Mental Health and Neuroscience, Faculty of Health, Medicine and Life Sciences, Maastricht University, Maastricht, The Netherlands
| | | | | | | | | | | | | | | |
Collapse
|
36
|
Kang MS, Ahn KH, Kim SK, Jeon HJ, Ji JE, Choi JM, Jung KM, Jung SY, Kim DK. Hypoxia-induced neuronal apoptosis is mediated by de novo synthesis of ceramide through activation of serine palmitoyltransferase. Cell Signal 2009; 22:610-8. [PMID: 19932170 DOI: 10.1016/j.cellsig.2009.11.015] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2009] [Accepted: 11/13/2009] [Indexed: 02/07/2023]
Abstract
Cellular hypoxia can lead to cell death or adaptation and has important effects on development, physiology, and pathology. Here, we investigated the role and regulation of ceramide in hypoxia-induced apoptosis of SH-SY5Y neuroblastoma cells. Hypoxia increased the ceramide concentration; subsequently, we observed biochemical changes indicative of apoptosis, such as DNA fragmentation, nuclear staining, and poly ADP-ribose polymerase (PARP) cleavage. The hypoxic cell death was potently inhibited by a caspase inhibitor, zVAD-fmk (benzyloxycarbonyl-Val-Ala-Asp-fluoromethyl ketone). l-Cycloserine, a serine palmitoyltransferase (SPT) inhibitor, and fumonisin B(1) (FB(1)), a ceramide synthase inhibitor, inhibited the hypoxia-induced increase in ceramide, indicating that the increase occurred via the de novo pathway. Hypoxia increased the activity and protein levels of SPT2, suggesting that the hypoxia-induced increase in ceramide is due to the transcriptional up-regulation of SPT2. Specific siRNA of SPT2 prevented hypoxia-induced cell death and ceramide production. However, hypoxia also increased the cellular level of glucosylceramide, which was inhibited by a glucosylceramide synthase (GCS) inhibitor and specific siRNA, but not a ceramidase inhibitor. The increase in glucosylceramide was accompanied by increases in both PARP cleavage and DNA fragmentation. Together, the current results suggest that both SPT and GCS may regulate the cellular level of ceramide, and thus may be critical enzymes for deciding the fate of the cells exposed to hypoxia.
Collapse
Affiliation(s)
- Mi Sun Kang
- Department of Environmental & Health Chemistry, College of Pharmacy, Chung-Ang University, 221 Huksuk-Dong, Dongjak-Ku, Seoul 156-756, South Korea
| | | | | | | | | | | | | | | | | |
Collapse
|
37
|
Huang HC, Chang PY, Chang K, Chen CY, Lin CW, Chen JH, Mou CY, Chang ZF, Chang FH. Formulation of novel lipid-coated magnetic nanoparticles as the probe for in vivo imaging. J Biomed Sci 2009; 16:86. [PMID: 19772552 PMCID: PMC2758848 DOI: 10.1186/1423-0127-16-86] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2008] [Accepted: 09/21/2009] [Indexed: 11/15/2022] Open
Abstract
Background Application of superparamagnetic iron oxide nanoparticles (SPIOs) as the contrast agent has improved the quality of magnetic resonance (MR) imaging. Low efficiency of loading the commercially available iron oxide nanoparticles into cells and the cytotoxicity of previously formulated complexes limit their usage as the image probe. Here, we formulated new cationic lipid nanoparticles containing SPIOs feasible for in vivo imaging. Methods Hydrophobic SPIOs were incorporated into cationic lipid 1,2-dioleoyl-3-(trimethylammonium) propane (DOTAP) and polyethylene-glycol-2000-1,2-distearyl-3-sn-phosphatidylethanolamine (PEG-DSPE) based micelles by self-assembly procedure to form lipid-coated SPIOs (L-SPIOs). Trace amount of Rhodamine-dioleoyl-phosphatidylethanolamine (Rhodamine-DOPE) was added as a fluorescent indicator. Particle size and zeta potential of L-SPIOs were determined by Dynamic Light Scattering (DLS) and Laser Doppler Velocimetry (LDV), respectively. HeLa, PC-3 and Neuro-2a cells were tested for loading efficiency and cytotoxicity of L-SPIOs using fluorescent microscopy, Prussian blue staining and flow cytometry. L-SPIO-loaded CT-26 cells were tested for in vivo MR imaging. Results The novel formulation generates L-SPIOs particle with the average size of 46 nm. We showed efficient cellular uptake of these L-SPIOs with cationic surface charge into HeLa, PC-3 and Neuro-2a cells. The L-SPIO-loaded cells exhibited similar growth potential as compared to unloaded cells, and could be sorted by a magnet stand over ten-day duration. Furthermore, when SPIO-loaded CT-26 tumor cells were injected into Balb/c mice, the growth status of these tumor cells could be monitored using optical and MR images. Conclusion We have developed a novel cationic lipid-based nanoparticle of SPIOs with high loading efficiency, low cytotoxicity and long-term imaging signals. The results suggested these newly formulated non-toxic lipid-coated magnetic nanoparticles as a versatile image probe for cell tracking.
Collapse
Affiliation(s)
- Huey-Chung Huang
- Institute of Biochemistry and Molecular Biology, College of Medicine, National Taiwan University, Taipei, Taiwan.
| | | | | | | | | | | | | | | | | |
Collapse
|
38
|
Evangelopoulos ME, Weis J, Krüttgen A. Mevastatin-induced neurite outgrowth of neuroblastoma cells via activation of EGFR. J Neurosci Res 2009; 87:2138-44. [DOI: 10.1002/jnr.22025] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
|
39
|
Schulte JH, Pentek F, Hartmann W, Schramm A, Friedrichs N, Øra I, Koster J, Versteeg R, Kirfel J, Buettner R, Eggert A. The low-affinity neurotrophin receptor, p75, is upregulated in ganglioneuroblastoma/ganglioneuroma and reduces tumorigenicity of neuroblastoma cells in vivo. Int J Cancer 2009; 124:2488-94. [PMID: 19142969 DOI: 10.1002/ijc.24204] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Neuroblastoma, the most common extracranial tumor of childhood, is derived from neural crest progenitor cells that fail to differentiate along their predefined route to sympathetic neurons or sympatho-adrenergic adrenal cells. Although expression of the high-affinity neurotrophin receptors, TrkA and TrkB, is of major importance in neuroblastoma, the significance of the expression of the low-affinity neurotrophin receptor, p75, is unclear. Here, we analyzed immunohistochemically expression of p75 on a tissue microarray of 93 primary neuroblastic tumors and assessed the functional consequences of p75 expression in neuroblastoma cell lines. We found the p75 receptor protein to be expressed in neuroblastic cells of ganglioneuromas/ganglioneuroblastomas as well as differentiating neuroblastomas, but not in poorly differentiated neuroblastomas. In an unrelated cohort of 110 neuroblastic tumors, p75 mRNA expression levels correlated with differentiation, and patients with tumors that expressed p75 at high levels had an increased event-free and overall survival. In addition, we did not detect p75 expression in 8 established neuroblastoma cell lines examined with FACS analysis. These cell lines exhibited an undifferentiated morphology, and were all derived from aggressive, high-stage neuroblastomas. Ectopic p75 expression in the SH-SY5Y neuroblastoma cell line significantly reduced proliferation, increased the fraction of apoptotic cells in vitro and resulted in a loss of tumorigenicity in nude mice. Taken together, our data suggest that expression of the p75 low-affinity neurotrophin receptor is correlated with a reduced level of tumorigenicity, and that induction of p75 expression may be an option to revert features of an aggressive tumor phenotype.
Collapse
Affiliation(s)
- Johannes H Schulte
- Department of Pediatric Oncology and Haematology, University Children's Hospital Essen, 45122 Essen, Germany.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
40
|
Study of Complexes of C 2- and C 6-dihydroceramides with Transition Metal Ions Using Electrospray Ionization Tandem Mass Spectrometry (ESI-MS/MS). B KOREAN CHEM SOC 2009. [DOI: 10.5012/bkcs.2009.30.2.397] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
41
|
Barbosa-Barros L, de la Maza A, López-Iglesias C, López O. Ceramide effects in the bicelle structure. Colloids Surf A Physicochem Eng Asp 2008. [DOI: 10.1016/j.colsurfa.2007.11.044] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
42
|
Bruno JG, Carrillo MP, Phillips T, King B. Development of DNA aptamers for cytochemical detection of acetylcholine. In Vitro Cell Dev Biol Anim 2008; 44:63-72. [PMID: 18311508 DOI: 10.1007/s11626-008-9086-0] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2007] [Accepted: 01/29/2008] [Indexed: 11/27/2022]
Abstract
This report describes a novel approach to the detection of acetylcholine using DNA aptamers. Aptamers were developed by eight rounds of acetylcholine affinity column chromatography and polymerase chain reaction (PCR) amplification. Sequences from rounds 5 and 8 were screened by colorimetric enzyme-based microtiter plate assays and found to bind acetylcholine and related compounds, but not unrelated compounds. One of the highest affinity aptamers, designated ACh 6R, was further tested in aptamer-peroxidase and aptamer-fluorescence staining protocols. Using Neuro-2a murine neuroblastoma cells induced to differentiate in the presence of 1 muM all-trans-retinoic acid for 5-7 d, ACh 6R detected cholinergic cells by both the peroxidase and fluorescence methods. Unrelated DNA aptamers did not stain the cells using either method. Fixation with cold 2% paraformaldehyde was compared to cold alkaline allyl alcohol plus glutaraldehyde for immobilization of acetylcholine in situ and appeared to enable detection of greater numbers of cholinergic cells, although differences in levels of differentiation may have been a factor as well. Acetylcholine generally appeared to be distributed throughout the differentiated Neuro-2a cell bodies. However, in some cells, punctate staining along neurite outgrowths and near the termini of cellular processes suggested detection of acetylcholine in discrete vesicles.
Collapse
Affiliation(s)
- John G Bruno
- Operational Technologies Corporation, 4100 NW Loop 410, Suite 230, San Antonio, TX 78229, USA.
| | | | | | | |
Collapse
|
43
|
Shevchenko VP, Nagaev IY, Myasoedov NF. Methods for the synthesis of tritium-labelled fatty acids and their derivatives, oxylipins and steroids. RUSSIAN CHEMICAL REVIEWS 2007. [DOI: 10.1070/rc1999v068n10abeh000528] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
44
|
Son JH, Yoo HH, Kim DH. Activation of de novo synthetic pathway of ceramides is responsible for the initiation of hydrogen peroxide-induced apoptosis in HL-60 cells. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2007; 70:1310-8. [PMID: 17654249 DOI: 10.1080/15287390701434364] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Sphingolipid metabolites in HL-60 cells were analyzed to gain an understanding of their roles in early events underlying hydrogen peroxide (H2O2)-induced apoptosis. Incubation of cells with H2O2 increased the intracellular levels of ceramides and sphinganine, but decreased those of ceramide 1-phosphates (ceramide 1-P) and sphingosine. The levels of sphingomyelins and sphingomyelinase (SMase) activities were not affected by H2O2 treatment. These results were similar to the profiles induced by daunorubicin, an activator of serine palmitoyl CoA transferase (SPT), suggesting that H2O2 stimulated the de novo synthetic pathway of ceramides. L-cycloserine and fumonisin B1 (FB1), specific inhibitors of de novo ceramide biosynthesis, suppressed the elevation of ceramides and sphinganine induced by H2O2, which consequently reduced apoptotic cell death. Collectively, these results demonstrated that H2O2 increased the intracellular concentrations of ceramides via activation of a de novo biosynthetic pathway, and the enhanced ceramides might initiate apoptosis in HL-60 cells.
Collapse
Affiliation(s)
- Jung Hyun Son
- Bioanalysis and Biotransformation Research Center, Korea Institute of Science and Technology, Seoul, Republic of Korea
| | | | | |
Collapse
|
45
|
Murakami M, Ichihara M, Sobue S, Kikuchi R, Ito H, Kimura A, Iwasaki T, Takagi A, Kojima T, Takahashi M, Suzuki M, Banno Y, Nozawa Y, Murate T. RET signaling-induced SPHK1 gene expression plays a role in both GDNF-induced differentiation and MEN2-type oncogenesis. J Neurochem 2007; 102:1585-1594. [PMID: 17555548 DOI: 10.1111/j.1471-4159.2007.04673.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
RET, the receptor of glial cell line-derived neurotrophic factor (GDNF) family ligands, is important for the development of kidney and peripheral neurons. GDNF promotes survival and differentiation of neurons. Mutation of RET leads to the constitutive signal activation causing papillary thyroid carcinoma and multiple endocrine neoplasia type 2 (MEN2). In this study, we report that GDNF/RET signaling up-regulates sphingosine kinase (SPHK) enzyme activity, SPHK1 protein and SPHK1 message in TGW human neuroblastoma cells. Silencing of SPHK1 using siRNA inhibited GDNF-induced neurite formation, GAP43 expression, and cell growth, suggesting the important role of SPHK1 in GDNF signal transduction. Furthermore, NIH3T3 cells transfected with MEN2A type mutated RET but not c-RET demonstrated the up-regulation of SPHK activity, SPHK1 protein and SPHK1 message compared with NIH3T3 cells. The cell growth and anchorage-independent colony formation of MEN2A-NIH3T3 was inhibited with siRNA of SPHK1, while no effect of scramble siRNA was observed. These results suggest the oncogenic role of SPHK1 in MEN2A type tumor. Promoter analysis showed that activator protein 2 and specificity protein 1 binding motif of the 5' promoter region of SPHK1 gene is important for its induction by GDNF. Furthermore, we demonstrated that ERK1/2 and PI3 kinase are involved in GDNF-induced SPHK1 transcription by using specific inhibitors.
Collapse
Affiliation(s)
- Masashi Murakami
- Department of Medical Technology, Nagoya University Graduate School of Health Sciences, Nagoya, JapanDepartment of Pathology, Nagoya University School of Medicine, Nagoya, JapanDepartment of Molecular Carcinogenesis, Nagoya University Graduate School of Medicine, Nagoya, JapanDepartment of Cell Signaling, Gifu University School of Medicine, Gifu, JapanGifu International Institute of Biotechnology, Kakamigahara, Japan
| | - Masatoshi Ichihara
- Department of Medical Technology, Nagoya University Graduate School of Health Sciences, Nagoya, JapanDepartment of Pathology, Nagoya University School of Medicine, Nagoya, JapanDepartment of Molecular Carcinogenesis, Nagoya University Graduate School of Medicine, Nagoya, JapanDepartment of Cell Signaling, Gifu University School of Medicine, Gifu, JapanGifu International Institute of Biotechnology, Kakamigahara, Japan
| | - Sayaka Sobue
- Department of Medical Technology, Nagoya University Graduate School of Health Sciences, Nagoya, JapanDepartment of Pathology, Nagoya University School of Medicine, Nagoya, JapanDepartment of Molecular Carcinogenesis, Nagoya University Graduate School of Medicine, Nagoya, JapanDepartment of Cell Signaling, Gifu University School of Medicine, Gifu, JapanGifu International Institute of Biotechnology, Kakamigahara, Japan
| | - Ryosuke Kikuchi
- Department of Medical Technology, Nagoya University Graduate School of Health Sciences, Nagoya, JapanDepartment of Pathology, Nagoya University School of Medicine, Nagoya, JapanDepartment of Molecular Carcinogenesis, Nagoya University Graduate School of Medicine, Nagoya, JapanDepartment of Cell Signaling, Gifu University School of Medicine, Gifu, JapanGifu International Institute of Biotechnology, Kakamigahara, Japan
| | - Hiromi Ito
- Department of Medical Technology, Nagoya University Graduate School of Health Sciences, Nagoya, JapanDepartment of Pathology, Nagoya University School of Medicine, Nagoya, JapanDepartment of Molecular Carcinogenesis, Nagoya University Graduate School of Medicine, Nagoya, JapanDepartment of Cell Signaling, Gifu University School of Medicine, Gifu, JapanGifu International Institute of Biotechnology, Kakamigahara, Japan
| | - Ami Kimura
- Department of Medical Technology, Nagoya University Graduate School of Health Sciences, Nagoya, JapanDepartment of Pathology, Nagoya University School of Medicine, Nagoya, JapanDepartment of Molecular Carcinogenesis, Nagoya University Graduate School of Medicine, Nagoya, JapanDepartment of Cell Signaling, Gifu University School of Medicine, Gifu, JapanGifu International Institute of Biotechnology, Kakamigahara, Japan
| | - Takashi Iwasaki
- Department of Medical Technology, Nagoya University Graduate School of Health Sciences, Nagoya, JapanDepartment of Pathology, Nagoya University School of Medicine, Nagoya, JapanDepartment of Molecular Carcinogenesis, Nagoya University Graduate School of Medicine, Nagoya, JapanDepartment of Cell Signaling, Gifu University School of Medicine, Gifu, JapanGifu International Institute of Biotechnology, Kakamigahara, Japan
| | - Akira Takagi
- Department of Medical Technology, Nagoya University Graduate School of Health Sciences, Nagoya, JapanDepartment of Pathology, Nagoya University School of Medicine, Nagoya, JapanDepartment of Molecular Carcinogenesis, Nagoya University Graduate School of Medicine, Nagoya, JapanDepartment of Cell Signaling, Gifu University School of Medicine, Gifu, JapanGifu International Institute of Biotechnology, Kakamigahara, Japan
| | - Tetsuhito Kojima
- Department of Medical Technology, Nagoya University Graduate School of Health Sciences, Nagoya, JapanDepartment of Pathology, Nagoya University School of Medicine, Nagoya, JapanDepartment of Molecular Carcinogenesis, Nagoya University Graduate School of Medicine, Nagoya, JapanDepartment of Cell Signaling, Gifu University School of Medicine, Gifu, JapanGifu International Institute of Biotechnology, Kakamigahara, Japan
| | - Masahide Takahashi
- Department of Medical Technology, Nagoya University Graduate School of Health Sciences, Nagoya, JapanDepartment of Pathology, Nagoya University School of Medicine, Nagoya, JapanDepartment of Molecular Carcinogenesis, Nagoya University Graduate School of Medicine, Nagoya, JapanDepartment of Cell Signaling, Gifu University School of Medicine, Gifu, JapanGifu International Institute of Biotechnology, Kakamigahara, Japan
| | - Motoshi Suzuki
- Department of Medical Technology, Nagoya University Graduate School of Health Sciences, Nagoya, JapanDepartment of Pathology, Nagoya University School of Medicine, Nagoya, JapanDepartment of Molecular Carcinogenesis, Nagoya University Graduate School of Medicine, Nagoya, JapanDepartment of Cell Signaling, Gifu University School of Medicine, Gifu, JapanGifu International Institute of Biotechnology, Kakamigahara, Japan
| | - Yoshiko Banno
- Department of Medical Technology, Nagoya University Graduate School of Health Sciences, Nagoya, JapanDepartment of Pathology, Nagoya University School of Medicine, Nagoya, JapanDepartment of Molecular Carcinogenesis, Nagoya University Graduate School of Medicine, Nagoya, JapanDepartment of Cell Signaling, Gifu University School of Medicine, Gifu, JapanGifu International Institute of Biotechnology, Kakamigahara, Japan
| | - Yoshinori Nozawa
- Department of Medical Technology, Nagoya University Graduate School of Health Sciences, Nagoya, JapanDepartment of Pathology, Nagoya University School of Medicine, Nagoya, JapanDepartment of Molecular Carcinogenesis, Nagoya University Graduate School of Medicine, Nagoya, JapanDepartment of Cell Signaling, Gifu University School of Medicine, Gifu, JapanGifu International Institute of Biotechnology, Kakamigahara, Japan
| | - Takashi Murate
- Department of Medical Technology, Nagoya University Graduate School of Health Sciences, Nagoya, JapanDepartment of Pathology, Nagoya University School of Medicine, Nagoya, JapanDepartment of Molecular Carcinogenesis, Nagoya University Graduate School of Medicine, Nagoya, JapanDepartment of Cell Signaling, Gifu University School of Medicine, Gifu, JapanGifu International Institute of Biotechnology, Kakamigahara, Japan
| |
Collapse
|
46
|
Abstract
Neurotrophin stimulation of tropomyosin-related kinase (Trk) and p75 receptors influences cellular processes such as proliferation, growth, differentiation, and other cell-specific functions, as well as regeneration. In contrast to Trk receptors, which have a well-defined trophic role, p75 has activities ranging from trophism to apoptosis. Continued neurotrophin stimulation of differentiating neurons transforms the initially trophic character of p75 signaling into negative growth control and overstimulation leads to apoptosis. This function shift reflects the signaling effects of ceramide that is generated upon stimulation of p75. The use of ceramide signaling by p75 may provide a key to understanding the cell-biological role of p75. The review presents arguments that the control of cell shape formation and cell selection can serve as an organizing principle of p75 signaling. Concurrent stimulation by neurotrophins of p75 and Trk receptors constitutes a dual growth control with antagonistic and synergistic elements aimed at optimal morphological and functional integration of cells and cell populations into their context.
Collapse
Affiliation(s)
- A Blöchl
- Biochemie II, Fakultät Chemie und Biochemie, Ruhr-Universität Bochum, Bochum, Germany.
| | | |
Collapse
|
47
|
Krebs S, Medugorac I, Röther S, Strässer K, Förster M. A missense mutation in the 3-ketodihydrosphingosine reductase FVT1 as candidate causal mutation for bovine spinal muscular atrophy. Proc Natl Acad Sci U S A 2007; 104:6746-51. [PMID: 17420465 PMCID: PMC1868895 DOI: 10.1073/pnas.0607721104] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
The bovine form of the autosomal recessive neurodegenerative disease spinal muscular atrophy (SMA) shows striking similarity to the human form of the disease. It has, however, been mapped to a genomic region not harboring the bovine orthologue of the SMN gene, mutation of which causes human SMA. After refinement of the mapping results we analyzed positional and functional candidate genes. One of three candidate genes, FVT1, encoding 3-ketodihydrosphingosine reductase, which catalyzes a crucial step in the glycosphingolipid metabolism, showed a G-to-A missense mutation that changes Ala-175 to Thr. The identified mutation is limited to SMA-affected animals and carriers and always appears in context of the founder haplotype. The Ala variant found in healthy animals showed the expected 3-ketodihydrosphingosine reductase activity in an in vitro enzyme assay. Importantly, the Thr variant found in SMA animals showed no detectable activity. Surprisingly, in an in vivo assay the mutated gene complements the growth defect of a homologous yeast knockout strain as well as the healthy variant. This finding explains the viability of affected newborn calves and the later neuron-specific onset of the disease, which might be due to the high sensitivity of these neurons to changes in housekeeping functions. Taken together, the described mutation in FVT1 is a strong candidate for causality of SMA in cattle. This result provides an animal model for understanding the underlying mechanisms of the development of SMA and will allow efficient selection against the disease in cattle.
Collapse
Affiliation(s)
- Stefan Krebs
- *Institute for Animal Breeding, Faculty of Veterinary Medicine, Ludwig Maximilians University, Veterinärstrasse 13, 80539 Munich, Germany; and
| | - Ivica Medugorac
- *Institute for Animal Breeding, Faculty of Veterinary Medicine, Ludwig Maximilians University, Veterinärstrasse 13, 80539 Munich, Germany; and
- To whom correspondence should be addressed. E-mail:
| | - Susanne Röther
- Gene Center, Laboratory of Molecular Biology, and Department of Chemistry and Biochemistry, Ludwig Maximilians University, Feodor-Lynen-Strasse 25, 81377 Munich, Germany
| | - Katja Strässer
- Gene Center, Laboratory of Molecular Biology, and Department of Chemistry and Biochemistry, Ludwig Maximilians University, Feodor-Lynen-Strasse 25, 81377 Munich, Germany
| | - Martin Förster
- *Institute for Animal Breeding, Faculty of Veterinary Medicine, Ludwig Maximilians University, Veterinärstrasse 13, 80539 Munich, Germany; and
| |
Collapse
|
48
|
Yamane M, Yamane S. The induction of colonocyte differentiation in CaCo-2 cells by sodium butyrate causes an increase in glucosylceramide synthesis in order to avoid apoptosis based on ceramide. Arch Biochem Biophys 2007; 459:159-68. [PMID: 17303065 DOI: 10.1016/j.abb.2007.01.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2006] [Revised: 01/05/2007] [Accepted: 01/06/2007] [Indexed: 10/23/2022]
Abstract
To examine the relationship between apoptosis accompanying differentiation and sphingolipid-metabolism, CaCo-2 cells were used as a model of human intestinal epithelial cells and the variation in cellular Cer/GlcCer-content and related enzyme activities during butyrate-induced differentiation were investigated. The simultaneous administration of PDMP as a GlcCer synthase inhibitor caused a significant increase in the amount of Cers, especially palmitoyl-Cer. Butyrate caused an increase in the amount of GlcCers, especially alpha-hydroxy fatty acid-GlcCers, and in cellular GlcCer synthase activity. Cellular Cer content related to apoptosis was mainly regulated by the GlcCer synthase-based metabolism of Cers.
Collapse
Affiliation(s)
- Mototeru Yamane
- Department of Biochemistry, Tokyo Medical University, 6-1-1 Shinjuku, Shinjuku-ku, Tokyo 160, Japan.
| | | |
Collapse
|
49
|
Nakata H. Mitogen-activated protein kinase signaling is involved in suramin-induced neurite outgrowth in a neuronal cell line. Biochem Biophys Res Commun 2007; 355:842-8. [PMID: 17321499 DOI: 10.1016/j.bbrc.2007.02.045] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2007] [Accepted: 02/09/2007] [Indexed: 11/16/2022]
Abstract
Suramin is a well-known antitrypanosomal drug and a novel experimental agent for the treatment of several cancers. Previous study showed that suramin is an activator of extracellular signal-regulated kinase (ERK1/2) signaling in several cell lines including Chinese hamster ovary cells, although the physiological relevance of this activation remains uncertain. Here, it was shown that suramin enhances neurite outgrowth concomitant with activation of ERK1/2 in Neuro-2a cells, a neuronal cell line. These neurite outgrowth and ERK1/2 activation were significantly inhibited by PD98059, an inhibitor of mitogen-activated protein kinase kinase, as well as by activation of endogenous adenosine A2A receptors. The suramin-induced phosphorylation of ERK1/2 was also inhibited by inhibitors of Src family kinases. This attenuation of ERK1/2 activity was accompanied by a significant decrease in suramin-induced neurite outgrowth. These results suggest that suramin activates the Src/ERK1/2 signaling pathway that induces neurite outgrowth, both of which are negatively regulated by cAMP produced in response to activation of endogenous adenosine A2A receptors.
Collapse
Affiliation(s)
- Hiroyasu Nakata
- Department of Molecular Cell Signaling, Tokyo Metropolitan Institute for Neuroscience, Fuchu, Tokyo 183-8526, Japan.
| |
Collapse
|
50
|
Valaperta R, Valsecchi M, Rocchetta F, Aureli M, Prioni S, Prinetti A, Chigorno V, Sonnino S. Induction of axonal differentiation by silencing plasma membrane-associated sialidase Neu3 in neuroblastoma cells. J Neurochem 2007; 100:708-19. [PMID: 17176265 DOI: 10.1111/j.1471-4159.2006.04279.x] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A reduction of 70% of the plasma membrane-associated sialidase Neu3 activity, due to a corresponding reduction of the enzyme expression by transducing cells with a short hairpin RNA encoding a sequence target (complementary messenger of mouse Neu3), caused neurite elongation in Neuro2a murine neuroblastoma cells. The differentiation process was accompanied in parallel by an increase of the acetylcholinesterase activity, a moderate increase of the c-Src expression and by the presence of the axonal marker tau protein on the neurites. The sphingolipid pattern and turnover in transduced and control cells were characterized by thin layer chromatography, mass spectrometry and metabolic radiolabeling after feeding cells with tritiated sphingosine. Control cells contained about 2 nmol of gangliosides/mg cell protein. GM2 was the main compound, followed by GD1a, GM3 and GM1. In Neu3 silenced cells, the total ganglioside content remained quite similar, but GM2 increased by 54%, GM3 remain constant, and GM1 and GD1a decreased by 66% and 50%, respectively. Within the organic phase sphingolipids, ceramide decreased by 50%, whereas the sphingomyelin content did not change in Neu3 silenced cells.
Collapse
Affiliation(s)
- Rea Valaperta
- Department of Medical Chemistry, Biochemistry and Biotechnology, and Center of Excellence on Neurodegenerative Diseases, University of Milan, Segrate, Italy
| | | | | | | | | | | | | | | |
Collapse
|