1
|
Yin G, Du M, Li R, Li K, Huang X, Duan D, Ai X, Yao F, Zhang L, Hu Z, Wu B. Glia maturation factor beta is required for reactive gliosis after traumatic brain injury in zebrafish. Exp Neurol 2018; 305:129-138. [DOI: 10.1016/j.expneurol.2018.04.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2017] [Revised: 03/22/2018] [Accepted: 04/11/2018] [Indexed: 02/07/2023]
|
2
|
Ito JI, Lu R, Nagayasu Y, Yokoyama S. Apolipoprotein A-I induces tubulin phosphorylation in association with cholesterol release in fetal rat astrocytes. Biochim Biophys Acta Mol Cell Biol Lipids 2014; 1841:1234-40. [DOI: 10.1016/j.bbalip.2014.04.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2014] [Revised: 03/20/2014] [Accepted: 04/29/2014] [Indexed: 10/25/2022]
|
3
|
Ito JI, Nagayasu Y, Miura Y, Yokoyama S, Michikawa M. Astrocyte׳s endogenous apoE generates HDL-like lipoproteins using previously synthesized cholesterol through interaction with ABCA1. Brain Res 2014; 1570:1-12. [DOI: 10.1016/j.brainres.2014.04.037] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2014] [Revised: 04/01/2014] [Accepted: 04/26/2014] [Indexed: 10/25/2022]
|
4
|
Kheirollah A, Nagayasu Y, Ueda H, Yokoyama S, Michikawa M, Ito JI. Involvement of cdc42/Rho kinase in ApoA-I-mediated cholesterol efflux through interaction between cytosolic lipid-protein particles and microtubules in rat astrocytes. J Neurosci Res 2014; 92:455-63. [DOI: 10.1002/jnr.23324] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2013] [Revised: 10/11/2013] [Accepted: 10/15/2013] [Indexed: 11/11/2022]
Affiliation(s)
- Alireza Kheirollah
- Departments of Biochemistry; Nagoya City University Graduate School of Medical Sciences; Nagoya Japan
- Cellular and Molecular Research Center; Ahvaz Jundishapur University of Medical Sciences; Iran
| | - Yuko Nagayasu
- Departments of Biochemistry; Nagoya City University Graduate School of Medical Sciences; Nagoya Japan
| | - Hiroshi Ueda
- Department of Biomolecular Science; Faculty of Engineering; Gifu University; Gifu Japan
| | - Shinji Yokoyama
- Nutritional Health Science Research Center; Chubu University; Kasugai Japan
| | - Makoto Michikawa
- Departments of Biochemistry; Nagoya City University Graduate School of Medical Sciences; Nagoya Japan
| | - Jin-ichi Ito
- Departments of Biochemistry; Nagoya City University Graduate School of Medical Sciences; Nagoya Japan
| |
Collapse
|
5
|
Ito JI, Nagayasu Y, Kheirollah A, Abe-Dohmae S, Yokoyama S. ApoA-I enhances generation of HDL-like lipoproteins through interaction between ABCA1 and phospholipase Cγ in rat astrocytes. Biochim Biophys Acta Mol Cell Biol Lipids 2011; 1811:1062-9. [PMID: 21907307 DOI: 10.1016/j.bbalip.2011.08.016] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2011] [Revised: 08/04/2011] [Accepted: 08/25/2011] [Indexed: 11/15/2022]
Abstract
In the previous paper, we reported that apolipoprotein (apo) A-I enhances generation of HDL-like lipoproteins in rat astrocytes to be accompanied with both increase in tyrosine phosphorylation of phospholipase Cγ (PL-Cγ) and PL-Cγ translocation to cytosolic lipid-protein particles (CLPP) fraction. In this paper, we studied the interaction between apoA-I and ATP-binding cassette transporter A1 (ABCA1) to relate with PL-Cγ function for generation of HDL-like lipoproteins in the apoA-I-stimulated astrocytes. ABCA1 co-migrated with exogenous apoA-I with apparent molecular weight over 260kDa on SDS-PAGE when rat astrocytes were treated with apoA-I and then with a cross-linker, BS3. The solubilized ABCA1 of rat astrocytes was associated with the apoA-I-immobilized Affi-Gel 15. An LXR agonist, To901317, increased the cellular level of ABCA1, association of apoA-I with ABCA1 and apoA-I-mediated lipid release in rat astrocytoma GA-1/Mock cells where ABCA1 expression at baseline is very low. PL-Cγ was co-isolated by apoA-I-immobilized Affi-Gel 15 and co-immunoprecipitated by anti-ABCA1 antibody along with ABCA1 from the solubilized membrane fraction of rat astrocytes. The SiRNA of ABCA1 suppressed not only the PL-Cγ binding to ABCA1 but also the tyrosine phosphorylation of PL-Cγ. A PL-C inhibitor, U73122, prevented generation of apoA-I-mediated HDL-like lipoproteins in rat astrocytes. To901317 increased the association of PL-Cγ with ABCA1 in GA-1/Mock cells dependently on the increase of cellular level of ABCA1 without changing that of PL-Cγ. These findings suggest that the exogenous apoA-I augments the interaction between PL-Cγ and ABCA1 to stimulate tyrosine phosphorylation and activation of PL-Cγ for generation of HDL-like lipoproteins in astrocytes.
Collapse
Affiliation(s)
- Jin-ichi Ito
- Biochemistry, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan. jitoh@@med.nagoya-cu.ac.jp
| | | | | | | | | |
Collapse
|
6
|
Ueno S, Ito JI, Nagayasu Y, Furukawa T, Yokoyama S. An acidic fibroblast growth factor-like factor secreted into the brain cell culture medium upregulates apoE synthesis, HDL secretion and cholesterol metabolism in rat astrocytes. BIOCHIMICA ET BIOPHYSICA ACTA 2002; 1589:261-72. [PMID: 12031793 DOI: 10.1016/s0167-4889(02)00181-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Production and release of apolipoprotein (apo) E and cholesterol were highly upregulated in the astrocytes prepared by 1-week secondary culture after 1-month primary culture of rat fetal brain cells (M/W cells) in comparison to the cells prepared by a conventional method of 1-week primary and 1-week secondary culture (W/W cells). Both cell preparations were mostly composed of astrocytes with small population of other glial cells, except that type-2 astrocyte-like cells accounted for 5-15% of M/W cells indicating more activated and/or matured status. The conditioned medium of the 1-month primary culture stimulated W/W cells to increase the release of apoE and cholesterol into the medium. The treatment of W/W cells by acidic fibroblast growth factor (aFGF) similarly upregulated biosyntheses and release of apoE and cholesterol. The effect of the conditioned medium was completely inhibited by pretreatment with an anti-aFGF antibody. The increase of the aFGF message was demonstrated in the brain cells after 1-month primary culture. The findings suggested that an aFGF-like trophic factor upregulates biosynthesis and secretion of apoE-high density lipoprotein (HDL) in astrocytes probably by autocrine stimulation in this culture system. Since this cytokine is highly expressed in the development or post-injury period of the brain, it putatively activates intercellular cholesterol transport to support construction or recovery of the brain.
Collapse
Affiliation(s)
- Sachiko Ueno
- Psychiatry and Cognitive-Behavioral Science, Nagoya City University Graduate School of Medical Sciences, Kawasumi 1, Mizuho-cho, Japan
| | | | | | | | | |
Collapse
|
7
|
Ito J, Masuda M, Tanaka R. Sialosylcholesterol effects on reconstitution of microfilament and glia filament. J Neurochem 1994; 62:235-9. [PMID: 8263523 DOI: 10.1046/j.1471-4159.1994.62010235.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The effects of alpha-sialosylcholesterol (alpha-SC) on formation of either microfilament or glia filament of rat astrocytes were investigated using a reconstitution system. Polymerization of the depolymerized microfilament preparation that had been extracted from a crude cytoskeletal fraction of rat astrocytes, in the presence of 100 mM KCl and 10 mM MgCl2, was suppressed in a dose-dependent manner by alpha-SC. alpha-SC inhibited polymerization of G-actin in a similar manner. The intensity of alpha-SC inhibition of G-actin polymerization was as great as that of microfilament polymerization, suggesting that the inhibition of microfilament polymerization by alpha-SC was due to the direct action of alpha-SC on actin, the main component of microfilament. alpha-SC depolymerized partly the polymerized microfilament preparation, which resembled F-actin (microfilament-like filaments). alpha-SC suppressed, in a dose-dependent manner, polymerization of a glia filament preparation that had been extracted from astrocyte cytoskeletons in the presence of phalloidin. An increase in the amount of added alpha-SC (up to 15 microM) decreased the amount of the larger glia filament-like filaments, which were 10 nm thick and centrifuged down at 16,000 g for 30 min, and increased that of smaller ones precipitated only after centrifugation at 100,000 g for 1 h. The lower the concentration of the depolymerized glia filament extract, the greater was the inhibition by alpha-SC of the polymerization. alpha-SC repressed polymerization of vimentin, the dominant component of glia filament. Vimentin polymerization was more strongly inhibited by alpha-SC than polymerization of glia filament was.(ABSTRACT TRUNCATED AT 250 WORDS)
Collapse
Affiliation(s)
- J Ito
- Department of Biochemistry, Nagoya City University Medical School, Japan
| | | | | |
Collapse
|
8
|
Wen WN, Chang L. A novel human glioma cell line from pituitaries. IN VITRO CELLULAR & DEVELOPMENTAL BIOLOGY : JOURNAL OF THE TISSUE CULTURE ASSOCIATION 1993; 29A:111-3. [PMID: 8473267 DOI: 10.1007/bf02630939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
|
9
|
Asai K, Hirano T, Kaneko S, Moriyama A, Nakanishi K, Isobe I, Eksioglu YZ, Kato T. A novel glial growth inhibitory factor, gliostatin, derived from neurofibroma. J Neurochem 1992; 59:307-17. [PMID: 1613506 DOI: 10.1111/j.1471-4159.1992.tb08905.x] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Neurofibroma tissue was investigated for the presence of glial growth modulators that would suppress the proliferation of glial cells. A novel endogenous polypeptide inhibitor of proliferation and DNA synthesis in glial cells, gliostatin, was purified from the extracts of neurofibroma by a procedure comprising dye and anion-exchange column chromatography, and HPLC. A monoclonal antibody raised against partially purified gliostatin showed no cross-reactivity with known cytokines, but adsorbed the growth inhibitory activity of gliostatin and immunochemically visualized the putative gliostatin bands on western blot analyses. Although the product showed an apparent M(r) of 100,000 accompanied by an inhibitory activity on gel filtration column chromatography, it migrated at a lower apparent M(r) of 50,000 under the reducing conditions on western blotting, indicating that a homodimeric structure of native gliostatin consisted of 50-kDa subcomponents. Gliostatin was a potent growth inhibitor acting at nanomolar concentrations against all glial tumor cells and glia maturation factor-stimulated astroblasts, but not neuronal cells.
Collapse
Affiliation(s)
- K Asai
- Department of Bioregulation Research, Nagoya City University Medical School, Japan
| | | | | | | | | | | | | | | |
Collapse
|
10
|
Abe-Dohmae S, Ito JI, Kato T, Tanaka R. Growth inhibition by sialosyl cholesterol of rat glioma cells. Neurochem Int 1990; 17:93-100. [DOI: 10.1016/0197-0186(90)90072-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/1989] [Accepted: 01/20/1990] [Indexed: 11/29/2022]
|
11
|
Cytoskeletal regulation of normal rat glioblasts differentiated by glia maturation factor. Neurochem Int 1990; 16:133-40. [DOI: 10.1016/0197-0186(90)90080-d] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/1989] [Accepted: 09/05/1989] [Indexed: 11/18/2022]
|
12
|
Salm AK, McCarthy KD. Expression of beta-adrenergic receptors by astrocytes isolated from adult rat cortex. Glia 1989; 2:346-52. [PMID: 2553600 DOI: 10.1002/glia.440020507] [Citation(s) in RCA: 61] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Astrocytes are the most numerous cell type in the central nervous system. When cultured, these cells express a wide variety of receptors for neurotransmitters. Nonetheless, it has yet to be firmly established that adult astrocytes in situ express receptors for neurotransmitters. In this report the technique of combined receptor autoradiography and immunocytochemistry has been applied to isolated astrocytes from adult animals to examine beta-adrenergic receptor (beta-AR) expression by these cells. It is shown that fibrous and protoplasmic astrocytes isolated from adult rat cerebral cortices specifically bind the beta-AR ligand iodocyanopindolol and that this binding is inhibited by the beta-AR ligands propranolol and isoproterenol. These results indicate that at least two of the major morphological subtypes of adult astrocytes express beta-ARs.
Collapse
Affiliation(s)
- A K Salm
- Department of Pharmacology, School of Medicine, University of North Carolina, Chapel Hill 27599
| | | |
Collapse
|
13
|
Haynes LW. Fibroblast (heparin-binding) growing factors in neuronal development and repair. Mol Neurobiol 1988; 2:263-89. [PMID: 2855976 DOI: 10.1007/bf02935635] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Nearly thirty growth and trophic factors that have been purified from mammalian tissues in the last 15 yr have been found to share chemical identity. The results of their chemical purification and molecular cloning show that they are two distinct polypeptides (Mr 17,400 and 18,400), each of which gives rise to families of smaller size peptides. These peptides share a common affinity for heparin. In view of this property, a common nomenclature for the two principle peptide growth factors (heparin-binding growth factor classes 1 and 2; HBGF-1 and -2) has been proposed. However, the names acidic and basic Fibroblast Growth Factors (aFGF,bFGF), which were applied to them originally to describe their mitogenic activity, are more commonly in use and will therefore be adopted in this review. Brain tissue is one of the richest sources of FGFs. It has been used as a starting point for their chemical purification and to prepare genomic libraries for molecular cloning of the aFGF and bFGF genes. There is increasing evidence that these growth factors, expressed in neurons and glia throughout the mammalian nervous system, are implicated in neuronal cell proliferation, differentiation, and histogenesis. FGFs have a strong affinity not only for heparin, but also for the related heparan sulphate proteoglycans that are abundant in neural tissues. This fact provides a clue to the importance of tissue-associated proteoglycans in mediating the release, sequestration, and activation of FGFs and the modulation of their receptor binding and bioactivity. The relevance of FGFs to neural development and their mechanisms of action in neurons will be considered in light of the existing literature describing their biological properties and activity in mesodermal cell types. Evidence is reviewed showing that FGFs have in vivo biological activity, ameliorating the degeneration of central and peripheral neurons after axotomy. The presence and implications of high levels of FGFs in adult mammalian brain provides a direction for future research into neural regeneration. The bioactivity of FGFs in neural tissue may not depend on the regulation of their expression per se, but on the subregional modification of their interaction with proteoglycans.
Collapse
Affiliation(s)
- L W Haynes
- Department of Zoology, University of Bristol, UK
| |
Collapse
|
14
|
Suzuki F, Kato K, Kato T, Ogasawara N. S-100 protein in clonal astroglioma cells is released by adrenocorticotropic hormone and corticotropin-like intermediate-lobe peptide. J Neurochem 1987; 49:1557-63. [PMID: 2822856 DOI: 10.1111/j.1471-4159.1987.tb01027.x] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
S-100 protein in clonal GA-1 and C6 rat glioma cell lines was released in serum-free medium supplemented with adrenocorticotropic hormone (ACTH). The induction of S-100 protein release by ACTH was dose-dependent, showing a half-maximal release at about 5 microM, and the S-100 protein concentration in the medium increased sharply within 3 min, but slightly during further incubation. The S-100 protein release was apparently accompanied by a decrease in the membrane-bound form of S-100 protein in the cell. The S-100 protein release was induced not by the ACTH1-24 fragment, which exhibits the known effects of ACTH, but by the ACTH18-39 fragment, which is designated as corticotropin-like intermediate-lobe peptide (CLIP). These results indicate that the C-terminal half of ACTH is responsible for the S-100 protein release. The enhancement of S-100 protein release by ACTH was also observed in normal rat glioblasts. The release induced by ACTH was apparently specific to S-100 protein, because little release of the cytoplasmic enzymes, creatine kinase, and enolase was observed under the same conditions. High concentrations (5 mM) of dibutyryl cyclic AMP or dibutyryl cyclic GMP were also found to induce S-100 protein release; however, catecholamines (epinephrine, norepinephrine, isoproterenol, and dopamine), acetylcholine, and glutamic acid did not enhance the release.(ABSTRACT TRUNCATED AT 250 WORDS)
Collapse
Affiliation(s)
- F Suzuki
- Department of Biochemistry, Aichi Prefectural Colony, Japan
| | | | | | | |
Collapse
|
15
|
Kato T, Ito J, Tanaka R. Functional dissociation of dual activities of glia maturation factor: inhibition of glial proliferation and preservation of differentiation by glial growth inhibitory factor. Brain Res 1987; 430:153-6. [PMID: 3594269 DOI: 10.1016/0165-3806(87)90187-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Glial growth inhibitory factor (GGIF), derived from the culture medium of mouse neuroblastoma cell (NAs-1), lowered the DNA synthesis and cell multiplication of normal rat glioblasts induced by glia maturation factor (GMF). The inhibitory action of GGIF depended on the concentration of GMF in the culture medium, and was of an uncompetitive type on kinetic analysis. GGIF showed the inhibitory activity at a late stage of the G1 phase or early stage of the S phase. The factor, however, failed to inhibit the differentiation-promoting activity of GMF. The data strongly suggest that the dual activities of GMF, the promotion of glial proliferation and differentiation, may be elicited by mutually independent intracellular processes.
Collapse
|