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Saegusa S, Fukaya M, Kakegawa W, Tanaka M, Katsumata O, Sugawara T, Hara Y, Itakura M, Okubo T, Sato T, Yuzaki M, Sakagami H. Mice lacking EFA6C/Psd2, a guanine nucleotide exchange factor for Arf6, exhibit lower Purkinje cell synaptic density but normal cerebellar motor functions. PLoS One 2019; 14:e0216960. [PMID: 31095630 PMCID: PMC6522047 DOI: 10.1371/journal.pone.0216960] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Accepted: 05/01/2019] [Indexed: 11/18/2022] Open
Abstract
ADP ribosylation factor 6 (Arf6) is a small GTPase that regulates various neuronal events including formation of the axon, dendrites and dendritic spines, and synaptic plasticity through actin cytoskeleton remodeling and endosomal trafficking. EFA6C, also known as Psd2, is a guanine nucleotide exchange factor for Arf6 that is preferentially expressed in the cerebellar cortex of adult mice, particularly in Purkinje cells. However, the roles of EFA6C in cerebellar development and functions remain unknown. In this study, we generated global EFA6C knockout (KO) mice using the CRISPR/Cas9 system and investigated their cerebellar phenotypes by histological and behavioral analyses. Histological analyses revealed that EFA6C KO mice exhibited normal gross anatomy of the cerebellar cortex, in terms of the thickness and cellularity of each layer, morphology of Purkinje cells, and distribution patterns of parallel fibers, climbing fibers, and inhibitory synapses. Electron microscopic observation of the cerebellar molecular layer revealed that the density of asymmetric synapses of Purkinje cells was significantly lower in EFA6C KO mice compared with wild-type control mice. However, behavioral analyses using accelerating rotarod and horizontal optokinetic response tests failed to detect any differences in motor coordination, learning or adaptation between the control and EFA6C KO mice. These results suggest that EFA6C plays ancillary roles in cerebellar development and motor functions.
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Affiliation(s)
- Shintaro Saegusa
- Department of Anatomy, Kitasato University School of Medicine, Sagamihara, Kanagawa, Japan
| | - Masahiro Fukaya
- Department of Anatomy, Kitasato University School of Medicine, Sagamihara, Kanagawa, Japan
| | - Wataru Kakegawa
- Department of Physiology, Keio University School of Medicine, Tokyo, Japan
| | - Manabu Tanaka
- Bio-imaging Center, Kitasato University School of Medicine, Sagamihara, Kanagawa, Japan
| | - Osamu Katsumata
- Department of Anatomy, Kitasato University School of Medicine, Sagamihara, Kanagawa, Japan
| | - Takeyuki Sugawara
- Department of Anatomy, Kitasato University School of Medicine, Sagamihara, Kanagawa, Japan
| | - Yoshinobu Hara
- Department of Anatomy, Kitasato University School of Medicine, Sagamihara, Kanagawa, Japan
| | - Makoto Itakura
- Department of Biochemistry, Kitasato University School of Medicine, Sagamihara, Kanagawa, Japan
| | - Tadashi Okubo
- Department of Laboratory Animal Science, Kitasato University School of Medicine, Sagamihara, Kanagawa, Japan
| | - Toshiya Sato
- Department of Laboratory Animal Science, Kitasato University School of Medicine, Sagamihara, Kanagawa, Japan
| | - Michisuke Yuzaki
- Department of Physiology, Keio University School of Medicine, Tokyo, Japan
| | - Hiroyuki Sakagami
- Department of Anatomy, Kitasato University School of Medicine, Sagamihara, Kanagawa, Japan
- * E-mail:
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Katsumata O, Mori M, Sawane Y, Niimura T, Ito A, Okamoto H, Fukaya M, Sakagami H. Cellular and subcellular localization of ADP-ribosylation factor 6 in mouse peripheral tissues. Histochem Cell Biol 2017; 148:577-596. [PMID: 28748255 DOI: 10.1007/s00418-017-1599-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/19/2017] [Indexed: 01/30/2023]
Abstract
ADP-ribosylation factor 6 (Arf6) is a small GTPase that regulates endosomal trafficking and actin cytoskeleton remodeling. In the present study, we comprehensively examined the cellular and subcellular localization of Arf6 in adult mouse peripheral tissues by immunofluorescence and immunoelectron microscopy using the heat-induced antigen retrieval method with Tris-EDTA buffer (pH 9.0). Marked immunolabeling of Arf6 was observed particularly in epithelial cells of several tissues including the esophagus, stomach, small and large intestines, trachea, kidney, epididymis, oviduct, and uterus. In most epithelial cells of simple or pseudostratified epithelia, Arf6 exhibited predominant localization to the basolateral membrane and a subpopulation of endosomes. At an electron microscopic level, Arf6 was localized along the basolateral membrane, with dense accumulation at interdigitating processes and infoldings. Arf6 was present in a ring-like appearance at intercellular bridges in spermatogonia and spermatocytes in the testis and at the Flemming body of cytokinetic somatic cells in the ovarian follicle, thymus, and spleen. The present study provides anatomical clues to help understand the physiological roles of Arf6 at the whole animal level.
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Affiliation(s)
- Osamu Katsumata
- Department of Anatomy, Kitasato University School of Medicine, Sagamihara, Kanagawa, 252-0374, Japan
| | - Momoko Mori
- Department of Anatomy, Kitasato University School of Medicine, Sagamihara, Kanagawa, 252-0374, Japan
| | - Yusuke Sawane
- Department of Anatomy, Kitasato University School of Medicine, Sagamihara, Kanagawa, 252-0374, Japan
| | - Tomoko Niimura
- Department of Anatomy, Kitasato University School of Medicine, Sagamihara, Kanagawa, 252-0374, Japan
| | - Akiko Ito
- Department of Anatomy, Kitasato University School of Medicine, Sagamihara, Kanagawa, 252-0374, Japan.,Department of Anesthesiology, Kitasato University School of Medicine, Sagamihara, Kanagawa, 252-0374, Japan
| | - Hirotsugu Okamoto
- Department of Anesthesiology, Kitasato University School of Medicine, Sagamihara, Kanagawa, 252-0374, Japan
| | - Masahiro Fukaya
- Department of Anatomy, Kitasato University School of Medicine, Sagamihara, Kanagawa, 252-0374, Japan
| | - Hiroyuki Sakagami
- Department of Anatomy, Kitasato University School of Medicine, Sagamihara, Kanagawa, 252-0374, Japan.
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Sakagami H, Katsumata O, Hara Y, Sasaoka T, Fukaya M. BRAG2a, a Guanine Nucleotide Exchange Factor for Arf6, Is a Component of the Dystrophin-Associated Glycoprotein Complex at the Photoreceptor Terminal. ACTA ACUST UNITED AC 2017; 58:3795-3803. [DOI: 10.1167/iovs.17-21746] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Affiliation(s)
- Hiroyuki Sakagami
- Department of Anatomy, Kitasato University School of Medicine, Sagamihara, Kanagawa, Japan
| | - Osamu Katsumata
- Department of Anatomy, Kitasato University School of Medicine, Sagamihara, Kanagawa, Japan
| | - Yoshinobu Hara
- Department of Anatomy, Kitasato University School of Medicine, Sagamihara, Kanagawa, Japan
| | - Toshikuni Sasaoka
- Department of Comparative and Experimental Medicine, Brain Research Institute, Niigata University, Niigata, Japan
| | - Masahiro Fukaya
- Department of Anatomy, Kitasato University School of Medicine, Sagamihara, Kanagawa, Japan
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Abstract
Heat-induced antigen retrieval (HIAR) is an essential technique for current immunohistochemistry. We describe the mechanisms of HIAR and its protocols for formalin-fixed, paraffin-embedded specimens and frozen sections, which are the most popular materials for immunohistochemistry using light microscopy. In addition, we describe the antigen retrieval method for highly masked epitopes and double immunostaining using the horseradish peroxidase (HRP)-labeled antibody method and immunofluorescence method in this chapter.
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Affiliation(s)
- Shuji Yamashita
- Department of Pathology, School of Medicine, Keio University, 35-Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan.
| | - Osamu Katsumata
- Department of Anatomy, Kitasato University School of Medicine, 1-15-1 Kitasato, Sagamihara, Kanagawa, 228-8555, Japan
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Sakagami H, Katsumata O, Hara Y, Tamaki H, Fukaya M. Preferential localization of type I phosphatidylinositol 4-phosphate 5-kinase γ at the periactive zone of mouse photoreceptor ribbon synapses. Brain Res 2014; 1586:23-33. [PMID: 25152467 DOI: 10.1016/j.brainres.2014.08.051] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Revised: 08/12/2014] [Accepted: 08/16/2014] [Indexed: 01/22/2023]
Abstract
Type I phosphatidylinositol 4-phosphate 5 kinase γ (PIP5KIγ) constitutes a major pathway for the generation of phosphatidylinositol 4,5-bisphosphate (PtdIns(4,5)P2) that regulates a variety of neuronal functions at both presynaptic and postsynaptic compartments. In this study, we examined the expression and localization of PIP5KIγ in the adult mouse retina. RT-PCR analysis revealed that PIP5KIγ_v2 was predominantly expressed in the retina while PIP5KIγ_v3 was also expressed faintly. Immunostaining of the adult mouse retina revealed intense PIP5KIγ-immunoreactivity in the inner and outer plexiform layers in a punctate manner. In the photoreceptor ribbon synapse, PIP5KIγ was highly concentrated at the periactive zone. These findings suggest that PIP5KIγ, especially PIP5KIγ_i2, is localized at the periactive zone, a functionally suitable compartment for the endocytosis of synaptic vesicles in photoreceptor ribbon synapses.
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Affiliation(s)
- Hiroyuki Sakagami
- Department of Anatomy, Kitasato University School of Medicine, Sagamihara, Kanagawa 252-0374, Japan.
| | - Osamu Katsumata
- Department of Anatomy, Kitasato University School of Medicine, Sagamihara, Kanagawa 252-0374, Japan
| | - Yoshinobu Hara
- Department of Anatomy, Kitasato University School of Medicine, Sagamihara, Kanagawa 252-0374, Japan
| | - Hideaki Tamaki
- Department of Anatomy, Kitasato University School of Medicine, Sagamihara, Kanagawa 252-0374, Japan
| | - Masahiro Fukaya
- Department of Anatomy, Kitasato University School of Medicine, Sagamihara, Kanagawa 252-0374, Japan
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Yamamori S, Itakura M, Sugaya D, Katsumata O, Sakagami H, Takahashi M. Differential expression of SNAP-25 family proteins in the mouse brain. J Comp Neurol 2011; 519:916-32. [PMID: 21280044 DOI: 10.1002/cne.22558] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Soluble N-ethylmaleimide-sensitive factor attachment protein (SNAP)-25 is a neuronal SNARE protein essential for neurotransmitter release from presynaptic terminals. Three palmitoylated SNAP-25 family proteins: SNAP-25a, SNAP-25b, and SNAP-23, are expressed in the brain, but little is known about their distributions and functions. In the present study, we generated specific antibodies to distinguish these three homologous proteins. Immunoblot and immunohistochemical analyses revealed that SNAP-25b was distributed in synapse-enriched regions throughout almost the entire brain, whereas SNAP-25a and SNAP-23 were expressed in relatively specific brain regions with partially complementary expression patterns. SNAP-25a and SNAP-25b, but not SNAP-23, were also present in the axoplasm of nerve fibers. The intracellular localization was also different, and although SNAP-25b and SNAP-23 were found primarily in membrane and lipid raft-enriched fractions of mouse brain homogenates, a substantial amount of SNAP-25a was recovered in soluble fractions. In PC12 cells, SNAP-25b was localized to the plasma membrane, but SNAP-25a and SNAP-23 were distributed throughout the cytoplasm. The expression and distribution of these three proteins were also differentially regulated in the early postnatal period. These results indicate that the three SNAP-25 family proteins display a differential distribution in the brain as well as in neuronal cells, and possibly play distinct roles.
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Affiliation(s)
- Saori Yamamori
- Department of Biochemistry, Kitasato University School of Medicine, Sagamihara, Kanagawa, Japan
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Fukaya M, Kamata A, Hara Y, Tamaki H, Katsumata O, Ito N, Takeda S, Hata Y, Suzuki T, Watanabe M, Harvey RJ, Sakagami H. SynArfGEF is a guanine nucleotide exchange factor for Arf6 and localizes preferentially at post-synaptic specializations of inhibitory synapses. J Neurochem 2011; 116:1122-37. [PMID: 21198641 DOI: 10.1111/j.1471-4159.2010.07167.x] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
SynArfGEF, also known as BRAG3 or IQSEC3, is a member of the brefeldin A-resistant Arf-GEF/IQSEC family and was originally identified by screening for mRNA species associated with the post-synaptic density fraction. In this study, we demonstrate that synArfGEF activates Arf6, using Arf pull down and transferrin incorporation assays. Immunohistochemical analysis reveals that synArfGEF is present in somata and dendrites as puncta in close association with inhibitory synapses, whereas immunoelectron microscopic analysis reveals that synArfGEF localizes preferentially at post-synaptic specializations of symmetric synapses. Using yeast two-hybrid and pull down assays, we show that synArfGEF is able to bind utrophin/dystrophin and S-SCAM/MAGI-2 scaffolding proteins that localize at inhibitory synapses. Double immunostaining reveals that synArfGEF co-localizes with dystrophin and S-SCAM in cultured hippocampal neurons and cerebellar cortex, respectively. Both β-dystroglycan and S-SCAM were immunoprecipitated from brain lysates using anti-synArfGEF IgG. Taken together, these findings suggest that synArfGEF functions as a novel regulator of Arf6 at inhibitory synapses and associates with the dystrophin-associated glycoprotein complex and S-SCAM.
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Affiliation(s)
- Masahiro Fukaya
- Department of Anatomy, Kitasato University School of Medicine, Sagamihara, Kanagawa, Japan
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Yoshida T, Katsumata O, Nakazato K, Adachi E. [Type IV collagen: structure, function, and its clinical significance]. Nihon Rinsho 2010; 68 Suppl 9:414-418. [PMID: 21667496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
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Katsumata O, Ohara N, Tamaki H, Niimura T, Naganuma H, Watanabe M, Sakagami H. IQ-ArfGEF/BRAG1 is associated with synaptic ribbons in the mouse retina. Eur J Neurosci 2009; 30:1509-16. [PMID: 19811534 DOI: 10.1111/j.1460-9568.2009.06943.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
IQ-ArfGEF/BRAG1 is a guanine nucleotide exchange factor for ADP ribosylation factors (Arfs), which are implicated in membrane trafficking and actin cytoskeleton dynamics. In this study, we examined the immunohistochemical localization of IQ-ArfGEF/BRAG1 in the adult mouse retina using light and electron microscopy. IQ-ArfGEF/BRAG1 was distributed in a punctate manner and colocalized well with RIBEYE in both the outer and inner plexiform layers. Immunoelectron microscopic analysis showed that IQ-ArfGEF/BRAG1 was localized at the synaptic ribbons of photoreceptors. When heterologously expressed in HeLa cells, IQ-ArfGEF/BRAG1 was recruited to RIBEYE-containing clusters and formed an immunoprecipitable complex with RIBEYE. Furthermore, immunoprecipitation analysis showed that anti-IQ-ArfGEF/BRAG1 antibody efficiently pulled down RIBEYE from retinal lysates. These findings indicate that IQ-ArfGEF/BRAG1 is a novel component of retinal synaptic ribbons and forms a protein complex with RIBEYE.
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Affiliation(s)
- Osamu Katsumata
- Department of Anatomy, Kitasato University School of Medicine, Sagamihara, Kanagawa 228-8555, Japan
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Yamashita S, Katsumata O, Okada Y. Establishment of a standardized post-embedding method for immunoelectron microscopy by applying heat-induced antigen retrieval. J Electron Microsc (Tokyo) 2009; 58:267-279. [PMID: 19332863 DOI: 10.1093/jmicro/dfp017] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We have developed a new standardized method for the post-embedding immunoelectron microscopy using the same fixation, antigen retrieval and image contrasting procedures. Tissues were fixed with 4% formaldehyde containing 2.5 mM CaCl(2), 1.25 mM MgCl(2) in a 0.1 M 4-(2-hydroxyethyl)-piperazineethanesulfonic acid (HEPES) buffer (pH 7.4) for 2 h and then with the same fixative composition in 0.1 M HEPES buffer (pH 8.5) overnight at room temperature. Vehicle osmolarity of fixatives was adjusted to 300-330 mOsm by adding glucose. The specimens were dehydrated with dimethylformamide on ice and embedded in LR-White resin. Ultrathin sections were heated in a 20 mM Tris-HCl buffer (pH 9.0) for 1-2 h at 95 degrees C. After immuno-gold labeling, the sections were treated with 2% glutaraldehyde containing 0.05% tannic acid in a 0.1 M phosphate buffer (pH 5.5) for 5 min and with a 1% OsO(4)/0.1 M phosphate buffer (pH 7.4) for 5 min, and then they were double stained with uranyl acetate and lead citrate. The standardized method yielded strong and reproducible immunoreactions for soluble, membrane-bound and filamentous proteins showing an excellent image contrast without destruction of the fine structures.
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Affiliation(s)
- Shuji Yamashita
- Electron Microscope Laboratory, School of Medicine, Keio University, Shinjuku-ku, Tokyo, Japan.
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Katsumata O, Sato YI, Sakai Y, Yamashina S. Intercalated duct cells in the rat parotid gland may behave as tissue stem cells. Anat Sci Int 2009; 84:148-54. [DOI: 10.1007/s12565-009-0019-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2008] [Accepted: 08/04/2008] [Indexed: 10/20/2022]
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Aoh QL, Castle AM, Hubbard CH, Katsumata O, Castle JD. SCAMP3 negatively regulates epidermal growth factor receptor degradation and promotes receptor recycling. Mol Biol Cell 2009; 20:1816-32. [PMID: 19158374 DOI: 10.1091/mbc.e08-09-0894] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
The epidermal growth factor receptor (EGFR) is targeted for lysosomal degradation by ubiquitin-mediated interactions with the ESCRTs (endosomal-sorting complexes required for transport) in multivesicular bodies (MVBs). We show that secretory carrier membrane protein, SCAMP3, localizes in part to early endosomes and negatively regulates EGFR degradation through processes that involve its ubiquitylation and interactions with ESCRTs. SCAMP3 is multimonoubiquitylated and is able to associate with Nedd4 HECT ubiquitin ligases and the ESCRT-I subunit Tsg101 via its PY and PSAP motifs, respectively. SCAMP3 also associates with the ESCRT-0 subunit Hrs. Depletion of SCAMP3 in HeLa cells by inhibitory RNA accelerated degradation of EGFR and EGF while inhibiting recycling. Conversely, overexpression enhanced EGFR recycling unless ubiquitylatable lysines, PY or PSAP motifs in SCAMP3 were mutated. Notably, dual depletions of SCAMP3 and ESCRT subunits suggest that SCAMP3 has a distinct function in parallel with the ESCRTs that regulates receptor degradation. This function may affect trafficking of receptors from prelysosomal compartments as SCAMP3 depletion appeared to sustain the incidence of EGFR-containing MVBs detected by immunoelectron microscopy. Together, our results suggest that SCAMP3, its modification with ubiquitin, and its interactions with ESCRTs coordinately regulate endosomal pathways and affect the efficiency of receptor down-regulation.
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Affiliation(s)
- Quyen L Aoh
- Department of Cell Biology, University of Virginia, Charlottesville, VA 22908, USA
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Sanda M, Kamata A, Katsumata O, Fukunaga K, Watanabe M, Kondo H, Sakagami H. The postsynaptic density protein, IQ-ArfGEF/BRAG1, can interact with IRSp53 through its proline-rich sequence. Brain Res 2008; 1251:7-15. [PMID: 19083995 DOI: 10.1016/j.brainres.2008.11.061] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2008] [Revised: 11/11/2008] [Accepted: 11/15/2008] [Indexed: 10/21/2022]
Abstract
IQ-ArfGEF/BRAG1, a guanine nucleotide exchange factor for Arf1 and Arf6, is localized at the postsynaptic density (PSD) and interacts with PSD-95. In this study, we identified a novel interaction of IQ-ArfGEF/BRAG1 with insulin receptor tyrosine kinase substrate of 53 kDa (IRSp53), also known as brain-specific angiogenesis inhibitor 1-associated protein 2. The interaction was mediated by the binding of the C-terminal proline-rich sequence of IQ-ArfGEF/BRAG1 to the SH3 domain of IRSp53. IQ-ArfGEF/BRAG1 and IRSp53 were colocalized at the PSD of excitatory synapses of certain neuronal populations. Our present findings suggest that IQ-ArfGEF/BRAG1 may play roles downstream of NMDA receptors through the interaction with multivalent PSD proteins such as IRSp53 and PSD-95.
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Affiliation(s)
- Masashi Sanda
- Department of Anatomy, Kitasato University School of Medicine, 1-15-1 Kitasato, Sagamihara, Kanagawa 228-8555, Japan
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Katsumata O, Fujita-Yoshigaki J, Hara-Yokoyama M, Yanagishita M, Furuyama S, Sugiya H. Syntaxin6 separates from GM1a-rich membrane microdomain during granule maturation. Biochem Biophys Res Commun 2007; 357:1071-7. [PMID: 17459336 DOI: 10.1016/j.bbrc.2007.04.053] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2007] [Accepted: 04/10/2007] [Indexed: 01/01/2023]
Abstract
Since it was reported that components of immature secretory granules (ISGs) are different from those of mature secretory granules (MSGs) in rat parotid acinar cells, we have been considering that components of secretory granules (SGs) change dynamically during granule maturation. As the first step to understand the mechanism of granule maturation, we separated low-density detergent-resistant membrane fractions (DRMs) from purified SGs of rat parotid gland. When SGs were lysed by the detergent Brij-58, syntaxin6 and VAMP4 were found in DRMs that were different from the GM1a-rich DRMs containing VAMP2. Because syntaxin6 and VAMP4 are known to be related to granule formation, we attempted to separate DRMs from ISGs. To enrich for ISGs, glands were removed from rats 5h after intraperitoneal injection of isoproterenol and used to purify the newly synthesized granules. Compared to mature granules prepared without injection, these newly formed granules were lower in density and contained higher concentrations of syntaxin6, VAMP4, and gamma-adaptin. This composition is consistent with the characterizations of ISGs. DRMs isolated from the newly formed granules were GM1a-rich and contained syntaxin6, VAMP4, and VAMP2 together. Thus, our findings suggest that syntaxin6 and VAMP4 associate with a GM1a-rich membrane microdomain during granule formation but enter a separate membrane microdomain before transport from granules during maturation.
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Affiliation(s)
- Osamu Katsumata
- Department of Physiology and Research Institute of Oral Science, Nihon University School of Dentistry at Matsudo, 2-870-1 Sakaecho-Nishi, Matsudo, Chiba 271-8587, Japan
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Qi B, Fujita-Yoshigaki J, Michikawa H, Satoh K, Katsumata O, Sugiya H. Differences in claudin synthesis in primary cultures of acinar cells from rat salivary gland are correlated with the specific three-dimensional organization of the cells. Cell Tissue Res 2007; 329:59-70. [PMID: 17347813 DOI: 10.1007/s00441-007-0389-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2006] [Accepted: 01/31/2007] [Indexed: 01/10/2023]
Abstract
Tight junctions are essential for the maintenance of epithelial cell polarity. We have previously established a system for the primary culture of salivary parotid acinar cells that retain their ability to generate new secretory granules and to secrete proteins in a signal-dependent manner. Because cell polarity and cell-cell adhesion are prerequisites for the formation of epithelial tissues, we have investigated the structure of the tight junctions in these cultures. We have found two types of cellular organization in the culture: monolayers and semi-spherical clusters. Electron microscopy has revealed tight junctions near the apical region of the lateral membranes between cells in the monolayers and cells at the surface of the clusters. The cells in the interior of the clusters also have tight junctions and are organized around a central lumen. These interior cells retain more secretory granules than the surface or monolayer cells, suggesting that they maintain their original character as acinar cells. The synthesis of claudin-4 increases during culture, although it is not detectable in the cells immediately after isolation from the glands. Immunofluorescence microscopy has shown that claudin-4 is synthesized in the monolayers and at the surface of the clusters, but not inside the clusters. Only claudin-3, which is present in the original acinar cells following isolation and in the intact gland, has been detected inside the clusters. These results suggest that differences in claudin expression are related to the three-dimensional structures of the cell cultures and reflect their ability to function as acinar cells.
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Affiliation(s)
- Bing Qi
- Department of Physiology, Nihon University School of Dentistry at Matsudo, Sakaecho-nishi 2-870-1, Matsudo, Chiba, 271-8587, Japan
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Fujita-Yoshigaki J, Katsumata O, Matsuki M, Yoshigaki T, Furuyama S, Sugiya H. Difference in distribution of membrane proteins between low- and high-density secretory granules in parotid acinar cells. Biochem Biophys Res Commun 2006; 344:283-92. [PMID: 16630574 DOI: 10.1016/j.bbrc.2006.03.130] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2006] [Accepted: 03/17/2006] [Indexed: 10/24/2022]
Abstract
Secretory granules (SGs) are considered to be generated as immature granules and to mature by condensation of their contents. In this study, SGs of parotid gland were separated into low-, medium-, and high-density granule fractions by Percoll-density gradient centrifugation, since it was proposed that the density corresponds to the degree of maturation. The observation with electron microscopy showed that granules in the three fractions were very similar. The average diameter of high-density granules was a little but significantly larger than that of low-density granules. Although the three fractions contained amylase, suggesting that they are all SGs, distribution of membrane proteins was markedly different. Syntaxin6 and VAMP4 were localized in the low-density granule fraction, while VAMP2 was concentrated in the high-density granule fraction. Immunoprecipitation with anti-syntaxin6 antibody caused coprecipitation of VAMP2 from the medium-density granule fraction without solubilization, but not from Triton X-100-solubilized fraction, while VAMP4 was coprecipitated from both fractions. Therefore, VAMP2 is present on the same granules, but is separated from syntaxin6 and VAMP4, which are expected to be removed from immature granules. These results suggest that the medium-density granules are intermediates from low- to high-density granules, and that the membrane components of SGs dynamically change by budding and fusion during maturation.
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Affiliation(s)
- Junko Fujita-Yoshigaki
- Department of Physiology, Nihon University School of Dentistry at Matsudo, Matsudo, Chiba 271-8587, Japan.
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17
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Yamamoto Y, Katsumata O, Furuyama S, Sugiya H. Ca2+, calmodulin and phospholipids regulate nitricoxide synthase activity in the rabbit submandibular gland. J Comp Physiol B 2004; 174:593-9. [PMID: 15449090 DOI: 10.1007/s00360-004-0448-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/26/2004] [Indexed: 10/26/2022]
Abstract
Nitric oxide (NO) plays an important role as an intra- and intercellular signaling molecule in mammalian tissues. In the submandibular gland, NO has been suggested to be involved in the regulation of secretion and in blood flow. NO is produced by activation of NO synthase (NOS). Here, we have investigated the regulation of NOS activity in the rabbit submandibular gland. NOS activity was detected in both the cytosolic and membrane fractions. Characteristics of NOS in the cytosolic and partially purified membrane fractions, such as Km values for l-arginine and EC(50) values for calmodulin and Ca(2+), were similar. A protein band that cross-reacted with anti-nNOS antibody was detected in both the cytosolic and membrane fractions. The membrane-fraction NOS activity increased 1.82-fold with treatment of Triton X-100, but the cytosolic-fraction NOS activity did not. The NOS activity was inhibited by phosphatidic acid (PA) and phosphatidylinositol 4,5-bisphosphate (PIP(2)). The inhibitory effects of phospholipids on the NOS activity were relieved by an increase in Ca(2+) concentrations. These results suggest that the Ca(2+)- and calmodulin-regulating enzyme nNOS occurs in cytosolic and membrane fractions, and PA and PIP(2) regulate the NOS activity in the membrane site by regulating the effect of Ca(2+) in the rabbit submandibular gland.
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Affiliation(s)
- Y Yamamoto
- Department of Physiology, Nihon University School of Dentistry at Matsudo, 271-8587 Chiba, Japan
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18
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Katsumata O, Kimura T, Nagatsuka Y, Hirabayashi Y, Sugiya H, Furuyama S, Yanagishita M, Hara-Yokoyama M. Charge-based separation of detergent-resistant membranes of mouse splenic B cells. Biochem Biophys Res Commun 2004; 319:826-31. [PMID: 15184057 DOI: 10.1016/j.bbrc.2004.05.058] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2004] [Indexed: 02/04/2023]
Abstract
Current biochemical characterization for cholesterol- and glycolipid-rich membrane microdomains largely depends on analysis of detergent-resistant membranes (DRMs). In the present study, we succeeded in separation of DRMs of similar density-based on their electrical charge using free-flow electrophoresis (FFE). After crosslinking of B cell receptor (BCR), mouse splenic B cells were lysed with 1% Brij-58 and the resulting lysate was subjected to sucrose density gradient ultracentrifugation. The low-density fraction that recovered a part of DRMs containing IgM together with those enriched in GM1a, the Src family protein tyrosine kinase Lyn, and the alpha subunit of inhibitory heterotrimeric GTP-binding protein was further resolved by FFE. FFE separated the former into more cathodally deflected fractions than the latter. In addition, FFE revealed an anodal shift of DRMs containing a transmembrane protein CD38 upon BCR-crosslinking. The results demonstrate the effectiveness of FFE for the charge-based separation of DRMs.
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Affiliation(s)
- Osamu Katsumata
- Department of Physiology, Nihon University School of Dentistry at Matsudo, 2-870-1 Sakae-cho Nishi, Matsudo, Chiba 271-8587, Japan
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19
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Katsumata O, Yokoyama M. [Association of Fc gamma receptor with low-density detergent-resistant membranes is important for crosslinking-dependent initiation of the tyrosine phosphorylation pathway and superoxide generation]. Tanpakushitsu Kakusan Koso 2002; 47:379-84. [PMID: 11915330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
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20
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Katsumata O, Hara-Yokoyama M, Sautès-Fridman C, Nagatsuka Y, Katada T, Hirabayashi Y, Shimizu K, Fujita-Yoshigaki J, Sugiya H, Furuyama S. Association of FcgammaRII with low-density detergent-resistant membranes is important for cross-linking-dependent initiation of the tyrosine phosphorylation pathway and superoxide generation. J Immunol 2001; 167:5814-23. [PMID: 11698455 DOI: 10.4049/jimmunol.167.10.5814] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
IgG immune complexes trigger humoral immune responses by cross-linking of FcRs for IgG (FcgammaRs). In the present study, we investigated role of lipid rafts, glycolipid- and cholesterol-rich membrane microdomains, in the FcgammaR-mediated responses. In retinoic acid-differentiated HL-60 cells, cross-linking of FcgammaRs resulted in a marked increase in the tyrosine phosphorylation of FcgammaRIIa, p58(lyn), and p120(c-cbl), which was inhibited by a specific inhibitor of Src family protein tyrosine kinases. After cross-linking, FcgammaRs and tyrosine-phosphorylated proteins including p120(c-cbl) were found in the low-density detergent-resistant membrane (DRM) fractions isolated by sucrose-density gradient ultracentrifugation. The association of FcgammaRs as well as p120(c-cbl) with DRMs did not depend on the tyrosine phosphorylation. When endogenous cholesterol was reduced with methyl-beta-cyclodextrin, the cross-linking did not induce the association of FcgammaRs as well as p120(c-cbl) with DRMs. In addition, although the physical association between FcgammaRIIa and p58(lyn) was not impaired, the cross-linking did not induce the tyrosine phosphorylation. In human neutrophils, superoxide generation induced by opsonized zymosan or chemoattractant fMLP was not affected or increased, respectively, after the methyl-beta-cyclodextrin treatment, but the superoxide generation induced by the insoluble immune complex via FcgammaRII was markedly reduced. Accordingly, we conclude that the cross-linking-dependent association of FcgammaRII to lipid rafts is important for the activation of FcgammaRII-associated Src family protein tyrosine kinases to initiate the tyrosine phosphorylation cascade leading to superoxide generation.
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Affiliation(s)
- O Katsumata
- Department of Physiology, Nihon University School of Dentistry, Matsudo, Japan
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21
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Abstract
Although the triple-helical structure of fibrillar collagen is regarded in general as being quite similar, each type of collagen molecule has inherent characteristics in the triple-helical domain. Few studies have ever been performed in terms of the aggregate structure of the triple-helical domain of fibrillar collagen. Reconstituted aggregates from the purified triple-helical domain of each type of fibrillar collagen might amplify the subtle differences in the structural characteristics of each type of collagen molecule. In this study, the reconstituted aggregate structure of pepsin-treated type V collagen (type Vp collagen), that is, virtually its triple-helical domain was characterized by transmission electron microscopy. Pepsin-treated type I (type Ip) and type II (type IIp) collagen were compared with type Vp collagen. Unique features of the aggregate structure of the triple-helical domain of the type V collagen can be summarized as follows:These results suggested that the lateral packing of the triple-helical domain of type V collagen is determined by its molecular structure. The characteristics of type Vp collagen fibrils might be explained by their characteristic amino acid composition. A significant feature of the triple-helical domain of type V collagen is the high content of glycosylated hydroxylysine residues. Molecular model building of the collagenous structure suggests that a change in surface roughness is conspicuous by incorporating the glycosylated hydroxylysine residues. More than a ten-fold content of bulky glycosylated hydroxylysine residues in type V collagen compared to that of type I might have a significant influence on both the intermolecular and interfibrillar interactions of the triple-helical domain of type V collagen molecule.
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Affiliation(s)
- K Mizuno
- Department of Life Sciences, Graduate School of Arts and Sciences, The University of Tokyo, Komaba, Meguro-ku, 153-8902, Tokyo, Japan.
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22
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Hara-Yokoyama M, Nagatsuka Y, Katsumata O, Irie F, Kontani K, Hoshino S, Katada T, Ono Y, Fujita-Yoshigaki J, Sugiya H, Furuyama S, Hirabayashi Y. Complex gangliosides as cell surface inhibitors for the ecto-NAD+ glycohydrolase of CD38. Biochemistry 2001; 40:888-95. [PMID: 11170409 DOI: 10.1021/bi0012080] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Leukocyte cell surface antigen CD38 is a single-transmembrane protein whose extracellular domain has catalytic activity for NAD(+) glycohydrolase (NADase). We previously reported that b-series gangliosides inhibit the NADase activity of the extracellular domain of CD38 expressed as a fusion protein [Hara-Yokoyama, M., Kukimoto, I., Nishina, H., Kontani, K., Hirabayashi, Y., Irie, F., Sugiya, H., Furuyama, S., and Katada, T. (1996) J. Biol. Chem. 271, 12951-12955]. In the present study, we examined the effect of exogenous gangliosides on the NADase activity of CD38 on the surface of retinoic acid-treated human leukemic HL60 cells and CD38-transfected THP-1 cells. After incubation of the cells with G(T1b), inhibition of NADase activity was observed. The time course of inhibition was slower than that of the incorporation of G(T1b) into the cells, suggesting that incorporation into the cell membranes is a prerequisite for inhibition. Inhibition occurred efficiently when G(T1b) and CD38 were present on the same cells (cis interaction) rather than on different cells (trans interaction). Although gangliosides may affect localization of cell surface proteins, indirect immunofluorescence intensity due to CD38 was not affected after G(T1b) treatment. Comparison of the effect of G(T1b) and G(D1a) indicates that the tandem sialic acid residues linked to the internal galactose residue of the gangliotetraose core are crucial to the inhibition. These results suggest a novel role of complex gangliosides for the first time as cell surface inhibitors of CD38 through specific and cis interaction between the oligosaccharide moiety and the extracellular domain.
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Affiliation(s)
- M Hara-Yokoyama
- Department of Physiology, Nihon University School of Dentistry at Matsudo, 2-870-1 Sakae-cho Nishi, Matsudo, Chiba 271-8587, Japan.
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Yamashina S, Tamaki H, Katsumata O. Review article fine structure of the exocrine cells of rat sublingual gland revealed by rapid freezing and freeze substitution method. Eur J Morphol 2000; 38:213-8. [PMID: 10980670 DOI: 10.1076/0924-3860(200010)38:4;1-o;ft213] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The ultrastructure of mucous cells of rat sublingual gland processed by rapid freezing, followed by freeze substitution, was compared with that obtained by the standard chemical fixation technique. The rapid freezing method gave a very good preservation of membrane structure with round and discrete mucous droplets (granules) not showing any sign of coalescence. The cisterns of the Golgi apparatus and the trans Golgi network also were well preserved. Upon secretory stimulation by pilocarpine, mucous droplets were discharged by the usual mechanism of exocytosis. From all these findings it emerged that mucous cells had the same structural characteristics as serous cells. In the endpieces of rat sublingual gland prepared by the rapid freezing method, serous cells aligned with mucous cells around the central lumen, and no cap-like arrangement of serous cells (demilunes) was observed. Furthermore, computer reconstruction of stereo images from serial section light micrographs prepared by the rapid freezing method showed that, within a given endpiece, all serous cells had direct access to the lumen and that they were disseminated throughout it and not only in its fundus. From our observations it seems very likely that, at least in rat sublingual gland, serous demilunes are an artificial product caused by the compression exerted on serous cells by the mucous cells distended during the conventional fixation procedure.
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Affiliation(s)
- S Yamashina
- Department of Anatomy, Kitasato University School of Medicine, Sagamihara, Japan.
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24
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Aoyama N, Yamashina S, Katsumata O, Kohno K, Nakahata J, Izumi T, Soma K, Ohwada T. Development of the rat heart conduction system in malformed hearts induced by hyperthermia: Origin of the atrial conduction system differs from that of ventricular one. Eur J Heart Fail 2000. [DOI: 10.1016/s1388-9842(00)80003-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Affiliation(s)
- N. Aoyama
- Emergency & Clitical Care Medicine; Kitasato University School of Medicine; Sagamihara Japan
| | - S. Yamashina
- Anatomy, Kitasato Universuty School of Medicine; Sagamihara Japan
| | - O. Katsumata
- Anatomy, Kitasato Universuty School of Medicine; Sagamihara Japan
| | - K. Kohno
- Internal Medicine; Kitasato University School of Medicine; Sagamihara Japan
| | - J. Nakahata
- Emergency & Clitical Care Medicine; Kitasato University School of Medicine; Sagamihara Japan
| | - T. Izumi
- Internal Medicine; Kitasato University School of Medicine; Sagamihara Japan
| | - K. Soma
- Emergency & Clitical Care Medicine; Kitasato University School of Medicine; Sagamihara Japan
| | - T. Ohwada
- Emergency & Clitical Care Medicine; Kitasato University School of Medicine; Sagamihara Japan
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25
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Abstract
To evaluate the usefulness of the atomic force microscope (AFM) for structural analysis of biomedical samples and to determine suitable sample preparation methods for AFM observation, the membrane of human erythrocytes prepared by various methods for electron microscopy was examined by the AFM. Strand-like elevations with 20-50 nm in width, 30-80 nm in length and 3-5 nm in height were observed, which formed networks composed of squares, pentagons and hexagons on the cytoplasmic or back surface of the erythrocyte membrane. Using colloidal gold labelled antibody, this network was found to contain spectrin molecules. Therefore it was very likely that the undercoat molecules of the plasma membrane were imaged by AFM. A large number of gentle elevations 300-400 nm in diameter and 2 nm in height were found to be distributed uniformly on the extracellular or true surface of intact erythrocyte, presumably reflecting the presence of undercoat membrane skeleton on the cytoplasmic surface. However, no structure that seemed to be derived from glycocalyces was discernible on the true surface. Structure corresponding to the unit membrane or lipid bilayer structure observable by electron microscopy was not demonstrated in the cross-section of the membrane. In freeze-fractured samples, a large number of small particles that corresponded to the intramembranous particle were also demonstrated on the membrane halves. Since AFM allows depiction of the fine structures of biological samples with very simple sample processing at a resolution comparable to or exceeding that of SEM, imaging technology using AFM can be applied to obtain biomedical information. However, several problems have to be solved in future development of the equipment.
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Affiliation(s)
- S Yamashina
- Department of Anatomy, Kitasato University School of Medicine, Sagamihara, Japan.
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26
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Yamashina S, Tamaki H, Katsumata O. The serous demilune of rat sublingual gland is an artificial structure produced by conventional fixation. Arch Histol Cytol 1999; 62:347-54. [PMID: 10596945 DOI: 10.1679/aohc.62.347] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The ultrastructure of the secretory end-piece of the rat sublingual gland was examined in samples prepared by rapid freezing and freeze-substitution method, and results were analyzed in combination with 3-D images reconstructed by computer graphics from light micrographs of serial sections. Fixation by rapid freezing followed by freeze-substitution preserved cellular ultrastructures, especially the membrane structure, in perfect condition, and demonstrated the terminal portion of the sublingual gland to be a compound branched tubulo-alveolar gland with serous cells distributed throughout the end-pieces. All the serous cells aligned with mucous cells to surround a common lumen, leaving no demilune structure. In contrast, samples fixed by the conventional immersion method showed distended mucous cells displacing the serous cells toward the basal portion of the acinus to form the demilune structure. The luminal space was also compressed and appeared disconnected from the serous cells. From these observations, the serous demilune that for more than 130 years has been believed to be an actual histological entity was proved to be an artificial structure produced through compression by the hydrated and expanded mucous cells during immersion fixation.
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Affiliation(s)
- S Yamashina
- Department of Anatomy, Kitasato University School of Medicine, Sagamihara, Japan.
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27
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Adachi E, Katsumata O, Yamashina S, Prockop DJ, Fertala A. Collagen II containing a Cys substitution for Arg-alpha1-519. Analysis by atomic force microscopy demonstrates that mutated monomers alter the topography of the surface of collagen II fibrils. Matrix Biol 1999; 18:189-96. [PMID: 10372559 DOI: 10.1016/s0945-053x(99)00011-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A recombinant human procollagen II was prepared that contained a substitution of Cys for Arg at alpha1-519 and that was found in five families with early onset generalized osteoarthritis with or without features of a mild chondrodysplasia. Previously, the presence of mutated monomers in mixtures with wildtype collagen II was shown to increase the lag period for fibril assembly. Also, the fibrils were more loosely packed and some thick fibrils lacked a D-periodic banding pattern. Here we re-examined the fibrils using a combination of transmission electron microscopy and atomic force microscopy. The presence of the mutated monomers increased the diameter of the thin filaments that were consistently formed in association with the thick fibrils of collagen II. In addition, the presence of the mutated monomers increased the depth of the gap regions in all fibrils with a distinct D-periodic banding pattern. The results, therefore, may indicate that the mutated monomers formed two or three additional outer layers of monomers in 0D-period staggers on the surface of the fibrils. Apparently, the mutated monomers were bound on the surface through intermolecular disulfide bonds.
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Affiliation(s)
- E Adachi
- Department of Anatomy, Kitasato University, School of Medicine, Sagamihara, Japan
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28
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Zhou X, Kudo A, Kawakami H, Hirano H, FAYED M, MAKITA T, SUZAKI E, KATAOKA K, Katsumata O, Fujimoto K, Yamashina S, USUDA N, JOHKURA K, SUGANUMA T, SAWAGUCHI A, NAGAIKE R, KAWANO JI, OINUMA T, Izumi SI, Iwamoto M, Shin M, Nakano PK, Ueda T, Ishikawa Y, Kubo E, Miyoshi N, Fukuda M, Akagi Y, Miki H, Nakajima M, Yuge K, Taomoto M, Tsubura A, Shikata N, Senzaki H, MASUDA A, NAGAOKA T, OYAMADA M, TAKAMATSU T, Furuta H, Hata Y, Yokoyama K, Takamatsu T, Itoh J, Takumi I, Kawai K, Serizawa A, Sanno N, Teramoto A, Osamura R, MATSUTA M, MATSUTA M, I N, TAKAHASHI S, KAWABE K, LIEBER MM, JENKINS RB, SASANO HIRONOBU, IINO KAZUMI, SUZUKI TAKASHI, NAGURA HIROSHI, Ge YB, Ohmori J, Tsuyama S, Yang DH, Murata F, JOHKURA K, LIANG Y, MATSUI T, NAKAZAWA A, HIGUCHI S, MATSUSHITA Y, Naritaka H, Kameya T, Sato Y, Inoue H, Otani M, Kawase T, KUROOKA Y, NASU K, KAMEYAMA S, MORIYAMA N, YANO J, TSUJIMOTO G, Matsushita T, Oyamada M, YAMAMOTO H, MATSUURA J, NOMURA T, SASAKI J, NAWA T, KITAZAWA R, KITAZAWA S, KASIMOTO H, MAEDA S, WATANABE J, Mino K, KONDO K, KANAMURA S, Ueki T, Takeuchi T, Nishimatsu H, Kajiwara T, Moriyama N, Kawabe K, Tominaga T, Kobayashi KI, Minei S, Okada Y, Yamanaka Y, Ichinose T, Hachiya T, Hirano D, Ishida H, Okada K, HASEGAWA H, WATANABE K, ITOH J, HASEGAWA H, UMEMURA S, YASUDA M, TAKEKOSHI S, OSAMURA R, WATANABE K, TAKEDA K, HOSHI T, KATO K, OHARA S, KONNO R, ASAKI S, TOYOTA T, TATENO H, NISHIKAWA S, SASAKI F, Ito Y, Matsumoto K, Daikoku E, Otsuki Y, SANO M, UMEZAWA A, ABE H, FUKUMA M, SUZUKI A, ANDO T, HATA JI. Abstracts. Acta Histochem Cytochem 1998. [DOI: 10.1267/ahc.31.143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
| | | | | | | | - M.H. FAYED
- Department of Anatomy, Faculty of Veterinary Medicine Tanta University
- Department of Veterinary Anatomy, Faculty of Agriculture, Yamaguchi University
| | - T. MAKITA
- Department of Veterinary Anatomy, Faculty of Agriculture, Yamaguchi University
| | - Etsuko SUZAKI
- Department of Anatomy, Hiroshima University School of Medicine
| | - Katsuko KATAOKA
- Department of Anatomy, Hiroshima University School of Medicine
| | | | | | | | - Nobuteru USUDA
- Department of Anatomy and Cell Biology, Shinshu University School of Medicine
| | - Kohhei JOHKURA
- Department of Anatomy and Cell Biology, Shinshu University School of Medicine
| | | | | | | | | | | | - Shin-ichi Izumi
- Department of Histology and Coll Biology, Nmgmeaki University School of Medicine
| | | | - Masashi Shin
- Department of Histology and Coll Biology, Nmgmeaki University School of Medicine
| | | | | | | | | | | | | | | | - H. Miki
- Department of Ophthalmology and Pathology, Kansai Medical University
| | - M. Nakajima
- Department of Ophthalmology and Pathology, Kansai Medical University
| | - K. Yuge
- Department of Ophthalmology and Pathology, Kansai Medical University
| | - M. Taomoto
- Department of Ophthalmology and Pathology, Kansai Medical University
| | - A. Tsubura
- Department of Ophthalmology and Pathology, Kansai Medical University
| | - N. Shikata
- Department of Ophthalmology and Pathology, Kansai Medical University
| | - H. Senzaki
- Department of Ophthalmology and Pathology, Kansai Medical University
| | - Atsushi MASUDA
- Department of Pathology and Cell Regulation, Kyoto Prefectural University of Medicine
| | - Takanori NAGAOKA
- Department of Pathology and Cell Regulation, Kyoto Prefectural University of Medicine
| | - Masahito OYAMADA
- Department of Pathology and Cell Regulation, Kyoto Prefectural University of Medicine
| | - Tetsuro TAKAMATSU
- Department of Pathology and Cell Regulation, Kyoto Prefectural University of Medicine
| | - Hirokazu Furuta
- Department of Pathology and Cell Regulation, Kyoto Prefectural University of Medicine
| | - Yoshinobu Hata
- Department of Pathology and Cell Regulation, Kyoto Prefectural University of Medicine
| | - Keiichi Yokoyama
- Department of Pathology and Cell Regulation, Kyoto Prefectural University of Medicine
| | - Tetsuro Takamatsu
- Department of Pathology and Cell Regulation, Kyoto Prefectural University of Medicine
| | | | | | - K. Kawai
- Div of Diag Pathol Tokai Univ Sch of Med
| | | | | | | | | | | | | | - Nishiya I
- Departments of Obstetrics and Gynecology
| | - Satoru TAKAHASHI
- Department of Urology, Faculty of Medicine, The University of Tokyo
| | - Kazuki KAWABE
- Department of Urology, Faculty of Medicine, The University of Tokyo
| | | | | | - HIRONOBU SASANO
- Department of Pathology, Tohoku University School of Medicine
| | - KAZUMI IINO
- Department of Pathology, Tohoku University School of Medicine
| | - TAKASHI SUZUKI
- Department of Pathology, Tohoku University School of Medicine
| | - HIROSHI NAGURA
- Department of Pathology, Tohoku University School of Medicine
| | - Y-B Ge
- Department of Anatomy, Faculty of Medicine, Kagoshima University
| | - J. Ohmori
- Department of Anatomy, Faculty of Medicine, Kagoshima University
| | - S. Tsuyama
- Department of Anatomy, Faculty of Medicine, Kagoshima University
| | - D-H Yang
- Department of Anatomy, Faculty of Medicine, Kagoshima University
| | - F. Murata
- Department of Anatomy, Faculty of Medicine, Kagoshima University
| | - Kohei JOHKURA
- Department of Anatomy and Cell Biology, Shinshu University School of Medicine
| | - Yan LIANG
- Department of Anatomy and Cell Biology, Shinshu University School of Medicine
| | - Toshifumi MATSUI
- Department of Geriatric Medicine, Tohoku University School of Medicine
| | - Ayami NAKAZAWA
- Department of Anatomy and Cell Biology, Shinshu University School of Medicine
| | - Susumu HIGUCHI
- National Institute of Alcoholism, National Kurihama Hospital
| | | | - Heiji Naritaka
- Department of Pathology, Kitasato University, Department of Neurosurgery, Keio University
| | - Toru Kameya
- Department of Pathology, Kitasato University, Department of Neurosurgery, Keio University
| | - Yuichi Sato
- Department of Pathology, Kitasato University, Department of Neurosurgery, Keio University
| | - Hiroshi Inoue
- Department of Pathology, Kitasato University, Department of Neurosurgery, Keio University
| | - Mitsuhiro Otani
- Department of Pathology, Kitasato University, Department of Neurosurgery, Keio University
| | - Takeshi Kawase
- Department of Pathology, Kitasato University, Department of Neurosurgery, Keio University
| | - Yuji KUROOKA
- Department of Uroloby, Faculty of Medicine, The University of Tokyo
| | - Kimio NASU
- Department of Molecular Biology, Reserch Laboratories, Nippon Shinyaku Co. Ltd
| | - Shuji KAMEYAMA
- Department of Uroloby, Faculty of Medicine, The University of Tokyo
| | - Nobuo MORIYAMA
- Department of Uroloby, Faculty of Medicine, The University of Tokyo
| | - Junichi YANO
- Department of Molecular Biology, Reserch Laboratories, Nippon Shinyaku Co. Ltd
| | - Gozo TSUJIMOTO
- Division of Pediatric Pharmacology, National Children's Medical Reserch Center
| | - Tsutomu Matsushita
- Department of Pathology and Cell Regulation, Kyoto Prefectural University of Medicine
| | - Masahito Oyamada
- Department of Pathology and Cell Regulation, Kyoto Prefectural University of Medicine
| | - Hitoshi YAMAMOTO
- Department of Oral Anatomy, School of Dentistry, Iwate Medical University
| | - Junko MATSUURA
- Department of Anatomy, Okayama University Medical School
| | - Takako NOMURA
- Department of Anatomy, Okayama University Medical School
| | - Junzo SASAKI
- Department of Anatomy, Okayama University Medical School
| | - Tokio NAWA
- Department of Oral Anatomy, School of Dentistry, Iwate Medical University
| | | | | | - Hideyoshi KASIMOTO
- Department of Pathology
- Department of Orthopaedic Surgery, Kobe University School of Medicine
| | | | - Jun WATANABE
- Department of Anatomy, Kansai Medical University
| | - Kazuto Mino
- Department of Anatomy, Kansai Medical University
| | | | | | - Tetsuo Ueki
- Department of Urology, Faculty of Medicine, The University of Tokyo Department of Urology, Mitsui Memorial Hospital
| | - Takumi Takeuchi
- Department of Urology, Faculty of Medicine, The University of Tokyo Department of Urology, Mitsui Memorial Hospital
| | - Hiroaki Nishimatsu
- Department of Urology, Faculty of Medicine, The University of Tokyo Department of Urology, Mitsui Memorial Hospital
| | - Takahiro Kajiwara
- Department of Urology, Faculty of Medicine, The University of Tokyo Department of Urology, Mitsui Memorial Hospital
| | - Nobuo Moriyama
- Department of Urology, Faculty of Medicine, The University of Tokyo Department of Urology, Mitsui Memorial Hospital
| | - Kazuki Kawabe
- Department of Urology, Faculty of Medicine, The University of Tokyo Department of Urology, Mitsui Memorial Hospital
| | - Takashi Tominaga
- Department of Urology, Faculty of Medicine, The University of Tokyo Department of Urology, Mitsui Memorial Hospital
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - M. YASUDA
- Dept of Pathol Tokai Univ Sch of Med
| | | | | | | | - Kazuo TAKEDA
- Department of Anatomy, Kansai Medical University
| | - Tatsuya HOSHI
- Departments of Pathology, Medicine and Obstetrics and Gynecology, the Tohoku University School of Medicine
| | - Katsuaki KATO
- Departments of Pathology, Medicine and Obstetrics and Gynecology, the Tohoku University School of Medicine
| | - Shuichi OHARA
- Departments of Pathology, Medicine and Obstetrics and Gynecology, the Tohoku University School of Medicine
| | - Ryo KONNO
- Departments of Pathology, Medicine and Obstetrics and Gynecology, the Tohoku University School of Medicine
| | - Shigeru ASAKI
- Departments of Pathology, Medicine and Obstetrics and Gynecology, the Tohoku University School of Medicine
| | - Takayoshi TOYOTA
- Departments of Pathology, Medicine and Obstetrics and Gynecology, the Tohoku University School of Medicine
| | - Hiroo TATENO
- Departments of Pathology, Medicine and Obstetrics and Gynecology, the Tohoku University School of Medicine
| | - Sumio NISHIKAWA
- Department of Biology, Tsurumi University School of Dental Medicine
| | - Fumie SASAKI
- Department of Biology, Tsurumi University School of Dental Medicine
| | - Yuko Ito
- Department of Anatomy and Biology, Osaka Medical College
| | | | - Eriko Daikoku
- Department of Anatomy and Biology, Osaka Medical College
| | | | - Makoto SANO
- Department of Pathology, Keio University School of Medicine
| | | | - Hitoshi ABE
- Department of Pathology, Keio University School of Medicine
| | - Mariko FUKUMA
- Department of Pathology, Keio University School of Medicine
| | - Atsushi SUZUKI
- Department of Pathology, Keio University School of Medicine
| | - Takashi ANDO
- Department of Pathology, Keio University School of Medicine
| | - Jun-ichi HATA
- Department of Pathology, Keio University School of Medicine
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Majima M, Isono M, Ikeda Y, Hayashi I, Hatanaka K, Harada Y, Katsumata O, Yamashina S, Katori M, Yamamoto S. Significant roles of inducible cyclooxygenase (COX)-2 in angiogenesis in rat sponge implants. Jpn J Pharmacol 1997; 75:105-14. [PMID: 9414024 DOI: 10.1254/jjp.75.105] [Citation(s) in RCA: 72] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Angiogenesis in rat sponge implants, as determined from the concentration of hemoglobin in the sponge granuloma tissues, was gradually increased over a 14-day experimental period. The inducible cyclooxygenase COX-2 was detected in the sponge granuloma tissues at day 4 by Western blot analysis using specific mouse COX-2 antibody. Angiogenesis in the sponge implants was enhanced by daily topical injections of human recombinant basic fibroblast growth factor (bFGF) or human recombinant epidermal growth factor (EGF) (100 or 1000 ng/sponge/day) for 4 days. These treatments clearly enhanced the expression of COX-2 in the sponge granuloma tissues. In immunohistochemical studies, COX-2-positive staining was mainly observed in the endothelial cells of the neovasculature and in the fibroblasts of the granuloma capsule. Administration of the selective COX-2 inhibitor NS-398 (p.o., 3 mg/kg, 3 times a day) for 14 days significantly inhibited the angiogenesis. The angiogenesis enhanced with bFGF or EGF (day 4) was inhibited by administration of indomethacin or NS-398, both in the above regimen, and fell to the level obtained without growth factor treatment. These results suggest that COX-2 induced in the sponge granuloma tissues may participate in neovascularization through prostaglandin formation.
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Affiliation(s)
- M Majima
- Department of Pharmacology, Kitasato University School of Medicine, Kanagawa, Japan
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30
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Kadoya Y, Katsumata O, Yamashina S. Substructures of the acinar basement membrane of rat submandibular gland as shown by alcian blue staining and cryo-fixation followed by freeze-substitution. J Electron Microsc (Tokyo) 1997; 46:405-412. [PMID: 9394453 DOI: 10.1093/oxfordjournals.jmicro.a023536] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The ultrastructure of the epithelial basement membrane was studied in the acinar cells of adult rat submandibular glands after: (i) immersion fixation in 0.1 M sodium cacodylate buffer (CB, pH 7.2) containing 2.5% glutaraldehyde (GA) and alcian blue (0.5%) in conjunction with microwave irradiation, (ii) perfusion fixation with 2.5% GA in CB, (iii) rapid freezing followed by freeze-substitution (RF-FS) with 1% GA in acetone, and (iv) RF-FS with 2% OsO4 in acetone. The specimens were post-fixed with 1% OsO4 in CB after methods (i) and (ii) but not (iii) and (iv). Fixed specimens were embedded in epoxy resin and the ultrathin sections were cut, stained with both lead and uranium, and observed under a transmission electron microscope. Various substructural components could be seen in the acinar basement membrane. In the specimens processed by method (iv), a clear meshwork structure could be found just beneath the basal plasma membrane. This meshwork could not be seen in the specimens processed by method (iii) but thin filaments of approximately 100 nm in length extending from the epithelial base toward the connective tissue space were evident. By methods (i) and (ii), an electron dense 30-75 nm layer could be seen subjacent to basal cell membranes. By method (ii), particularly, thick threads connecting this layer to collagen fibres in the connective tissue were stained with alcian blue. Lamina lucida was not identified.
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Affiliation(s)
- Y Kadoya
- Department of Anatomy, Kitasato University School of Medicine, Sagamihara, Japan
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31
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Majima M, Adachi K, Ohno T, Ogino M, Saito M, Kizuki K, Katsumata O, Yamashina S, Katori M. Failure of the oxytocin-induced increase in secretion of urinary kallikrein in young spontaneously hypertensive rats. Jpn J Pharmacol 1996; 71:11-9. [PMID: 8791167 DOI: 10.1254/jjp.71.11] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Urinary kallikrein excretion during oxytocin (OT) infusion were studied in anesthetized (sodium pentobarbital, 50 mg/kg, i.p.) young (4-weeks-old) spontaneously hypertensive rats (SHR) and Wistar Kyoto rats (WKY). OT-infusion (30 nmol/kg/30 min) to WKY significantly increased urinary excretion of the active kallikrein from the basal levels (25.4 +/- 5.6 10(-2) x AU/15 min, n = 5) to 37.3 +/- 5.0 10(-2) x AU/15 min (P < 0.05, n = 5) and 50.7 +/- 17.1 10(-2) x AU/15 min (P < 0.05, n = 5) 15 and 30 min after the start of OT-infusion, respectively. In SHR, OT-infusion did not increase the urinary excretion of active kallikrein, but did decrease the urine volume and sodium excretion. The concentration of the active kallikrein in the kidney of WKY was not changed by OT-infusion, but that of SHR was slightly increased. The OT-infusion resulted in significantly higher concentrations of the active kallikrein in SHR kidney than in WKY kidney. These results suggest that less excretion of urinary kallikrein in SHR during OT-infusion may be attributable to a lower response in the secretion of kallikrein from the kidney.
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Affiliation(s)
- M Majima
- Department of Pharmacology, Kitasato University School of Medicine, Kanagawa, Japan
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32
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Iwano M, Yokomura EI, IWATSUKI H, IYAMA KI, HIRAKI Y, TANAKA H, INOUE H, KONDO J, KAMIZONO A, SUZUKI F, USUKU G, SUGAHARA K, KAMADA Y, IWAMASA T, KAMI K, SATO N, ISHIKAWA M, NAKAI M, KASHIO N, TSUYAMA S, IHIDA K, MURATA F, KATO K, YOKOSE S, TAJIMA Y, KATOH R, IIDA Y, SUZUKI K, KAWAOI A, Kato S, Katsumata O, Tamaki H, Yamashina S, KATSURA A, YAMADA H, KUROKAWA K, OCHI J, KAWACHI H, TAKAMATSU T, MINAMIKAWA T, FUJITA S, KAWAHARA S, HIRANO Y, ITO N, HIROTA T, NAKAJIMA M, KAWAI N, KIKUCHI K, KOISO K, KOYAMA A, SANO M, SHIGEMATSU S, Kimura N, Watanabe K, Tagawa M, Murakoshi M, Karasawa H, Tani N, Miwa T, KINOSHITA T, MINAMI Y, AIMI Y, KIMURA H, KISHIMOTO M, UEDA K, NAKATA M, MATSUMOTO M, ASHIKARA T, KITAMURA H, NAGAI-TAKITA K, NAKAMURA M, Kitamura T, Tominaga T, Aso Y, KITO S, MIYOSHI R, KOBAYASHI T, SEGUCHI H, KOH T, KOJIMA Y, MAEDA T, KOMIYA M, FUKUSHIMA O, YAMASHITA H, KOMORI K, FUJII T, TAKEUCHI T, KARASAWA N, YAMADA K, NAGATSU I, KONG Y, USUDA N, HAMAI T, MORITA T, NAGATA T, KUMAMOTO T, HIROHATA T, Kunikata M, Yamada K, Mori M, KUNIKATA M, YAMADA K, SUMITOMO S, MORI M, Kunitake T, Minowada S, Shinohara M, Nagase Y, Moriyama N, Higashihara E, Aso Y, KURIMOTO S, NAGASE Y, UEKI T, MORIYAMA N, TAJIMA A, DOI N, HIGASHIHARA E, KURODA K, SHIRAI M, KURODA M, KUSHIMA R, KUSHIMA M, HATTORI T, MATSUI H, OGUNI M, HATTA T, HASHIMOTO R, TANAKA O. GENERAL SESSION. Acta Histochem Cytochem 1991. [DOI: 10.1267/ahc.24.517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
| | | | | | | | - Yuji HIRAKI
- Dept. of Biochemistry, Faculty of Dentistry, Osaka Univ
| | | | | | - Jun KONDO
- Research Center, Mitsubishi Kasei Corp
| | | | - Fujio SUZUKI
- Dept. of Biochemistry, Faculty of Dentistry, Osaka Univ
| | | | | | | | - Teruo IWAMASA
- Department of Pathology, Ryukyu University School of Medicine
| | - Koji KAMI
- Dep Human Morphol & Physiol, Tokiwa Univ
| | | | | | | | - Nobuyuki KASHIO
- Department of Anatomy, Faculty of Medicine. Kagoshima University
| | | | - Kaori IHIDA
- Department of Anatomy, Faculty of Medicine. Kagoshima University
| | - Fusayoshi MURATA
- Department of Anatomy, Faculty of Medicine. Kagoshima University
| | - Kohtaro KATO
- Departments of Clinical Laboratory, Meikai University School of Dentistry
| | - Satoshi YOKOSE
- Departments of Oral Pathology, Meikai University School of Dentistry
| | - Yoshifumi TAJIMA
- Departments of Oral Pathology, Meikai University School of Dentistry
| | - Ryohei KATOH
- Department of Pathology, Yamanashi Medical college
| | - Yoji IIDA
- Department of Pathology, Yamanashi Medical college
| | | | - Akira KAWAOI
- Department of Pathology, Yamanashi Medical college
| | - Seiji Kato
- Department of Anatomy, Medical College of Oita
| | - Osamu Katsumata
- Department of Anatomy, Kitasato University School of Medicine
| | - Hideaki Tamaki
- Department of Anatomy, Kitasato University School of Medicine
| | | | | | - Hisao YAMADA
- Department of Anatomy, Shiga University of Medical Science
| | | | - Junzo OCHI
- Department of Anatomy, Shiga University of Medical Science
| | - Hideyuki KAWACHI
- Department of Pathology, Kyoto Prefectural University of Medicine
| | | | | | - Setsuya FUJITA
- Department of Pathology, Kyoto Prefectural University of Medicine
| | - Shingo KAWAHARA
- Department of Legal Medicine and Pediatrics, Nara Medical University
| | - Yoshinari HIRANO
- Department of Legal Medicine and Pediatrics, Nara Medical University
| | - Nobuaki ITO
- Department of Legal Medicine and Pediatrics, Nara Medical University
| | - Tadaomi HIROTA
- Department of Legal Medicine and Pediatrics, Nara Medical University
| | - Mitsuru NAKAJIMA
- Department of Legal Medicine and Pediatrics, Nara Medical University
| | - Norio KAWAI
- Department of Anatomy, Aichi Medical University
| | | | | | - Akio KOYAMA
- Department of Nephrology, Tsukuba University
| | - Motoaki SANO
- Department of Internal Medicine, Teikyo University
| | | | - Norio Kimura
- Tokai Univ. School of Medicine Department of Internal Medicine
| | | | - Masashi Tagawa
- Tokai Univ. School of Medicine Department of Internal Medicine
| | | | | | - Norio Tani
- Tokai Univ. School of Medicine Department of Internal Medicine
| | - Takeshi Miwa
- Tokai Univ. School of Medicine Department of Internal Medicine
| | - Takashi KINOSHITA
- Insitute of Molecular Neurobiology, Shiga University of Medical Science
| | - Yoshihiko MINAMI
- Insitute of Molecular Neurobiology, Shiga University of Medical Science
| | - Yoshinari AIMI
- Insitute of Molecular Neurobiology, Shiga University of Medical Science
| | - Hiroshi KIMURA
- Insitute of Molecular Neurobiology, Shiga University of Medical Science
| | - Mitsuo KISHIMOTO
- The First Department of Pathology, Kyoto Prefectural University of Medicine
| | - Kazushige UEDA
- The First Department of Pathology, Kyoto Prefectural University of Medicine
| | - Masashi NAKATA
- The Second Department of Surgery, Kyoto Prefectural University of Medicine
| | - Masafumi MATSUMOTO
- The Third Department of Internal Medicine, Kyoto Prefectural University of Medicine
| | - Tsukasa ASHIKARA
- The First Department of Pathology, Kyoto Prefectural University of Medicine
| | | | | | | | - Tadaichi Kitamura
- Department of Urology, Branch Hospital, Faculty of Medicine, the University of Tokyo
| | | | - Yoshio Aso
- Department of Urology, Faculty of Medicine, the University of Tokyo
| | - Shozo KITO
- Division of Health Sciences, University of the Air
| | - Rie MIYOSHI
- Department of Pharmacology, Tokyo Women's Medical College
| | | | | | - Teizen KOH
- Departments of Ophthalmology and Anatomy, Shiga University of Medical Science
| | - Yasuji KOJIMA
- Departments of Ophthalmology and Anatomy, Shiga University of Medical Science
| | - Toshihiro MAEDA
- Departments of Ophthalmology and Anatomy, Shiga University of Medical Science
| | | | | | | | - Kaoru KOMORI
- Department of Anatomy, school of Medicine, Fujita Health University
| | - Tetsuya FUJII
- Department of Anatomy, school of Medicine, Fujita Health University
| | - Terumi TAKEUCHI
- Department of Anatomy, school of Medicine, Fujita Health University
| | | | - Keiki YAMADA
- Department of Anatomy, school of Medicine, Fujita Health University
| | - Ikuko NAGATSU
- Department of Anatomy, school of Medicine, Fujita Health University
| | - Yongli KONG
- Department of Anatomy and Cell Biology, Shinshu University School of Medicine
| | - Nobuteru USUDA
- Department of Anatomy and Cell Biology, Shinshu University School of Medicine
| | - Toru HAMAI
- Department of Anatomy and Cell Biology, Shinshu University School of Medicine
| | - Takashi MORITA
- Department of Anatomy and Cell Biology, Shinshu University School of Medicine
| | - Tetsuji NAGATA
- Department of Anatomy and Cell Biology, Shinshu University School of Medicine
| | | | | | - M. Kunikata
- Department of Oral & Mamilofacial Surgery, Asahi University School of Dentistry
| | - K. Yamada
- Department of Oral & Mamilofacial Surgery, Asahi University School of Dentistry
| | - M. Mori
- Department of Oral & Mamilofacial Surgery, Asahi University School of Dentistry
| | - M. KUNIKATA
- Oral Surgery, Asahi University School of Dentistry
| | - K. YAMADA
- Oral Surgery, Asahi University School of Dentistry
| | - S. SUMITOMO
- Oral Surgery, Asahi University School of Dentistry
| | - M. MORI
- Oral Surgery, Asahi University School of Dentistry
| | | | | | | | | | | | | | - Yoshio Aso
- Department of urology, Tokyo university hospital
| | | | | | - Tetsuo UEKI
- Department of Urology, The University of Tokyo
| | | | - Atsushi TAJIMA
- Branch Hospital, Faculty of Medicine, The University of Tokyo
| | - Naoto DOI
- Department of Urology, The University of Tokyo
| | | | - Kanami KURODA
- Department of Urology and Anatomy, Toho University School of Medicine
| | - Masafumi SHIRAI
- Department of Urology and Anatomy, Toho University School of Medicine
| | - Masaru KURODA
- Department of Urology and Anatomy, Toho University School of Medicine
| | | | | | | | | | - Masami OGUNI
- Department of Ophthalmology, Shimane Medical University
| | | | | | - Osamu TANAKA
- Department of Anatomy, Shimane Medical University
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Yamashina S, Katsumata O, Tamaki H, Takatsuki A. Morphological effects of brefeldin A on the intracellular transport of secretory materials in parotid acinar cells. Cell Struct Funct 1990; 15:31-7. [PMID: 2340587 DOI: 10.1247/csf.15.31] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
The morphological effects of Brefeldin A (BFA) on the parotid acinar cells of a rat were investigated at the stage of active resynthesis of secretory materials following administration of the secretogogue, isoproterenol. Incubation with BFA resulted in: a) marked dilation of the rough endoplasmic reticulum (RER), b) involution of the Golgi complex to rudimentary forms which disseminated throughout the cytoplasm, and c) agenesis of secretion granules. It appears that the primary action of BFA is inhibition of the export of secretory materials from the RER toward the Golgi complexes. Histochemical staining indicated the thiamine pyrophosphatase (TPPase) positive saccules of the Golgi stack to undergo degradation in autophagic vacuoles. In contrast, small vesicles showing the osmium reducing activity characteristic of cis elements, including osmium negative vesicles, continued to be present throughout a 4-h period of investigation, indicating the cis and, most likely, medial elements to be the components of the rudimentary Golgi complexes. On removal of the drug, a large number of transport vesicles appeared immediately from the RER and carried secretory materials to the rudimentary Golgi complex, so that the organelles were rapidly reconstructed within 30-60 min, followed by the reaccumulation of secretory granules by 90 min. It is thus indicated that the size and configuration of the Golgi complex is regulated by a dynamic equilibrium of the transport of secretory materials, and that the rudimentary Golgi complex containing cis and probably medial elements may function as the smallest units of the Golgi complex for full development as seen under normal conditions.
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Affiliation(s)
- S Yamashina
- Department of Anatomy, Kitasato University School of Medicine, Sagamihara, Japan
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Yamashina S, Katsumata O, Wada I, Kato K. Electron microscopic localization of 5'-nucleotidase in rat salivary glands. Comparative enzyme- and immunohistochemical studies. Histochemistry 1986; 84:231-6. [PMID: 3011709 DOI: 10.1007/bf00495787] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The localization of 5'-nucleotidase in rat parotid and submandibular glands was investigated at the electron microscope level by an immunohistochemical technique using a highly specific antibody, and the results were compared with those obtained using the newley developed cerium method for enzyme histochemistry. Both methods demonstrated that 5'-nucleotidase is located on the external surface of the luminal plasma membranes of acinar cells as well as on intercalated and striated ductal cells. In the basolateral membranes of these cells, the portions adjacent to myoepithelial cells exhibited intense reaction products, but the other areas of plasma membranes contained only trace amounts of the reaction products. Both cerium-based enzyme histochemistry and immunohistochemistry showed that myoepithelial cells retain the enzyme on their plasma membranes. Neither method produced reaction products in the intracytoplasmic structure of constitutive cells of the salivary glands. We discuss the usefulness of the cerium-ion method for the demonstration of 5'-nucleotidase activity and compare it with the traditional lead-ion method.
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