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Dzienis M, Cundom J, Fuentes C, Hansen A, Nordlinger M, Pastor A, Oppelt P, Neki A, Gregg R, Lima I, Franke F, da Cunha Junior G, Tseng J, Loree T, Joshi A, Mccarthy J, Naicker N, Sidi Y, Gumuscu B, De Castro G. 651O Pembrolizumab (pembro) + carboplatin (carbo) + paclitaxel (pacli) as first-line (1L) therapy in recurrent/metastatic (R/M) head and neck squamous cell carcinoma (HNSCC): Phase VI KEYNOTE-B10 study. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.07.775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Barney C, Branstetter A, Yaney A, Healy E, Rupert R, Neki A, Walston S, Diavolitsis V, Blakaj D, Wobb J, Mitchell D, Grecula J, Savvides P, Bhatt A. Carboplatin-Based Chemoradiation Improves Outcomes Compared to Cetuximab Bioradiation in Cisplatin Ineligible Locally Advanced p16 Negative Head and Neck cancer. Int J Radiat Oncol Biol Phys 2018. [DOI: 10.1016/j.ijrobp.2017.12.058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Barney CL, Walston S, Zamora P, Healy EH, Nolan N, Diavolitsis VM, Neki A, Rupert R, Savvides P, Agrawal A, Old M, Ozer E, Carrau R, Kang S, Rocco J, Teknos T, Grecula JC, Wobb J, Mitchell D, Blakaj D, Bhatt AD. Clinical outcomes and prognostic factors in cisplatin versus cetuximab chemoradiation for locally advanced p16 positive oropharyngeal carcinoma. Oral Oncol 2018; 79:9-14. [PMID: 29598954 DOI: 10.1016/j.oraloncology.2018.02.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [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: 10/26/2017] [Revised: 01/29/2018] [Accepted: 02/02/2018] [Indexed: 10/18/2022]
Abstract
OBJECTIVES Randomized trials evaluating cisplatin versus cetuximab chemoradiation (CRT) for p16+ oropharyngeal cancer (OPC) have yet to report preliminary data. Meanwhile, as a preemptive step toward morbidity reduction, the off-trial use of cetuximab in p16+ patients is increasing, even in those who could potentially tolerate cisplatin. The purpose of this study was to compare the efficacy of cisplatin versus cetuximab CRT in the treatment of p16+ OPC and to identify prognostic factors and predictors of tumor response. MATERIALS AND METHODS Cases of p16+ OPC treated with cisplatin or cetuximab CRT at our institution from 2010 to 2014 were identified. Recursive partitioning analysis (RPA) classification was used to determine low-risk (LR-RPA) and intermediate-risk (IR-RPA) groups. Log-rank/Kaplan-Meier and Cox Regression methods were used to compare groups. RESULTS We identified 205 patients who received cisplatin (n = 137) or cetuximab (n = 68) CRT in the definitive (n = 178) or postoperative (n = 27) setting. Median follow-up was 3 years. Cisplatin improved 3-year locoregional control (LRC) [92.7 vs 65.4%], distant metastasis-free survival (DMFS) [88.3 vs 71.2%], recurrence-free survival (RFS) [86.6 vs 50.6%], and overall survival (OS) [92.6 vs 72.2%] compared to cetuximab [all p < .001]. Concurrent cisplatin improved 3-year OS for LR-RPA (97.1 vs 80.3%, p < .001) and IR-RPA (97.1 vs 80.3%, p < .001) groupings. CONCLUSION When treating p16+ OPC with CRT, the threshold for substitution of cisplatin with cetuximab should be maintained appropriately high in order to prolong survival times and optimize locoregional and distant tumor control. When cetuximab is used in cisplatin-ineligible patients, altered fractionation RT should be considered in an effort to improve LRC.
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Affiliation(s)
- Christian L Barney
- Department of Radiation Oncology, The Ohio State University Wexner Medical Center, 460 West 10th Avenue, Columbus, OH 43210, USA.
| | - Steve Walston
- Department of Radiation Oncology, The Ohio State University Wexner Medical Center, 460 West 10th Avenue, Columbus, OH 43210, USA.
| | - Pedro Zamora
- Department of Radiation Oncology, The Ohio State University Wexner Medical Center, 460 West 10th Avenue, Columbus, OH 43210, USA.
| | - Erin H Healy
- Department of Radiation Oncology, The Ohio State University Wexner Medical Center, 460 West 10th Avenue, Columbus, OH 43210, USA.
| | - Nicole Nolan
- Department of Radiation Oncology, The Ohio State University Wexner Medical Center, 460 West 10th Avenue, Columbus, OH 43210, USA
| | - Virginia M Diavolitsis
- Department of Radiation Oncology, The Ohio State University Wexner Medical Center, 460 West 10th Avenue, Columbus, OH 43210, USA
| | - Anterpreet Neki
- Division of Medical Oncology, The Ohio State University Wexner Medical Center, 460 West 10th Avenue, Columbus, OH 43210, USA.
| | - Robert Rupert
- Division of Medical Oncology, The Ohio State University Wexner Medical Center, 460 West 10th Avenue, Columbus, OH 43210, USA.
| | - Panos Savvides
- The University of Arizona Cancer Center at Dignity Health St. Joseph's Hospital, 625 N 6th St, Phoenix, AZ 85004, USA
| | - Amit Agrawal
- Department of Otolaryngology-Head and Neck Surgery, The Ohio State University Wexner Medical Center, 460 West 10th Avenue, Columbus, OH 43210, USA.
| | - Matthew Old
- Department of Otolaryngology-Head and Neck Surgery, The Ohio State University Wexner Medical Center, 460 West 10th Avenue, Columbus, OH 43210, USA.
| | - Enver Ozer
- Department of Otolaryngology-Head and Neck Surgery, The Ohio State University Wexner Medical Center, 460 West 10th Avenue, Columbus, OH 43210, USA.
| | - Ricardo Carrau
- Department of Otolaryngology-Head and Neck Surgery, The Ohio State University Wexner Medical Center, 460 West 10th Avenue, Columbus, OH 43210, USA.
| | - Stephen Kang
- Department of Otolaryngology-Head and Neck Surgery, The Ohio State University Wexner Medical Center, 460 West 10th Avenue, Columbus, OH 43210, USA.
| | - James Rocco
- Department of Otolaryngology-Head and Neck Surgery, The Ohio State University Wexner Medical Center, 460 West 10th Avenue, Columbus, OH 43210, USA.
| | - Theodoros Teknos
- Department of Otolaryngology-Head and Neck Surgery, The Ohio State University Wexner Medical Center, 460 West 10th Avenue, Columbus, OH 43210, USA.
| | - John C Grecula
- Department of Radiation Oncology, The Ohio State University Wexner Medical Center, 460 West 10th Avenue, Columbus, OH 43210, USA.
| | - Jessica Wobb
- Department of Radiation Oncology, The Ohio State University Wexner Medical Center, 460 West 10th Avenue, Columbus, OH 43210, USA.
| | - Darrion Mitchell
- Department of Radiation Oncology, The Ohio State University Wexner Medical Center, 460 West 10th Avenue, Columbus, OH 43210, USA.
| | - Dukagjin Blakaj
- Department of Radiation Oncology, The Ohio State University Wexner Medical Center, 460 West 10th Avenue, Columbus, OH 43210, USA.
| | - Aashish D Bhatt
- Department of Radiation Oncology, The Ohio State University Wexner Medical Center, 460 West 10th Avenue, Columbus, OH 43210, USA.
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Barney C, Healy E, Zamora P, Aljabban J, Walston S, Diavolitsis V, Blakaj D, Wobb J, Mitchell D, Grecula J, Neki A, Rupert R, Savvides P, Bhatt A. Carboplatin Versus Cetuximab Chemoradiation in Cisplatin Ineligible Patients with Locally Advanced p16 Negative Head and Neck Squamous Cell Carcinoma. Int J Radiat Oncol Biol Phys 2017. [DOI: 10.1016/j.ijrobp.2017.06.1372] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Bekaii-Saab T, Starodub A, El-Rayes B, O’Neil B, Shahda S, Ciombor K, Noonan A, Hanna W, Sehdev A, Shaib W, Mikhail S, Neki A, Oh C, Li Y, Li W, Borodyansky L, Li C. A phase 1b/II study of cancer stemness inhibitor napabucasin in combination with gemcitabine (gem) & nab-paclitaxel (nabptx) in metastatic pancreatic adenocarcinoma (mpdac) patients (pts). Ann Oncol 2017. [DOI: 10.1093/annonc/mdx302.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Korytko T, Alvarez-Breckenridge C, Mayerson J, Neki A, Wakely P, Young G, Kim E. Intraoperative Radiotherapy Plus External Beam Radiotherapy versus External Beam Radiotherapy Alone for Soft Tissue Sarcoma of the Extremity: A Case Control Study. Int J Radiat Oncol Biol Phys 2008. [DOI: 10.1016/j.ijrobp.2008.06.415] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Kindwall-Keller T, Otterson GA, Young D, Neki A, Criswell T, Nuovo G, Soong R, Diasio R, Villalona-Calero MA. Phase II Evaluation of Docetaxel-Modulated Capecitabine in Previously Treated Patients with Non–Small Cell Lung Cancer. Clin Cancer Res 2005; 11:1870-6. [PMID: 15756012 DOI: 10.1158/1078-0432.ccr-04-1727] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [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: 11/16/2022]
Abstract
PURPOSE Based on the preclinical observation of upregulation of thymidine phosphorylase, the last enzymatic step in the conversion of capecitabine to 5-fluorouracil, by docetaxel along with good clinical tolerability of the combination of docetaxel and capecitabine using an optimized schedule in a previous phase I trial, we conducted this phase II study of this combination in patients with refractory or relapsed non-small cell lung cancer (NSCLC). PATIENTS AND METHODS Patients with NSCLC previously treated with at least one platinum- or paclitaxel-based regimen received docetaxel 36 mg/m(2) on days 1, 8, and 15 and capecitabine 625 mg/m(2) twice daily on days 5 to 18, every 4 weeks. The primary objective of the study was evaluation of progression-free survival (PFS) 26 weeks from initiation of treatment. RESULTS Thirty-six evaluable patients received 104 cycles of the combination. Severe toxicities were infrequent with only one patient requiring toxicity-related hospitalization. The 26-week PFS rate was 25% (95% confidence interval, 12-42) with an intent to treat median survival and 1-year survival rate of 9.1 months and 37%, respectively. Among 31 patients with measurable disease (Response Evaluation Criteria in Solid Tumors criteria), eight (26%; 95% confidence interval, 12-45) achieved partial responses. CONCLUSION The combination of capecitabine and weekly docetaxel is well tolerated in previously treated patients with NSCLC. The relatively high 26-week PFS and 1-year survival, as well as the high response rate observed, encourages further evaluation of this regimen in NSCLC, either in randomized trials for refractory patients or as a potential treatment option for chemotherapy naive patients.
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Affiliation(s)
- Tamila Kindwall-Keller
- Division of Hematology/Oncology, Arthur G. James Cancer Hospital, Ohio State University, 320 West Tenth Avenue, Columbus, OH 43210, USA
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Mion S, Corti C, Neki A, Shigemoto R, Corsi M, Fumagalli G, Ferraguti F. Bidirectional regulation of neurite elaboration by alternatively spliced metabotropic glutamate receptor 5 (mGluR5) isoforms. Mol Cell Neurosci 2001; 17:957-72. [PMID: 11414786 DOI: 10.1006/mcne.2001.0993] [Citation(s) in RCA: 20] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Alternative splicing in the mGluR5 gene generates two different receptor isoforms, of which expression is developmentally regulated. However, little is known about the functional significance of mGluR5 splice variants. We have examined the functional coupling, subcellular targeting, and effect on neuronal differentiation of epitope-tagged mGluR5 isoforms by expression in neuroblastoma NG108-15 cells. We found that both mGluR5 splice variants give rise to comparable [Ca2+]i transients and have similar pharmacological profile. Tagged receptors were shown by immunofluorescence to be inserted in the plasma membrane. In undifferentiated cells the subcellular localization of the two mGluR5 isoforms was partially segregated, whereas in differentiated cells the labeling largely redistributed to the newly formed neurites. Interestingly, we demonstrate that mGluR5 splice variants dramatically influence the formation and maturation of neurites; mGluR5a hinders the acquisition of mature neuronal traits and mGluR5b fosters the elaboration and extension of neurites. These effects are partly inhibited by MPEP.
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Affiliation(s)
- S Mion
- Department of Medicine and Public Health, Pharmacology Section, Universita' di Verona, Policlinico Borgo Roma, Verona, 37134, Italy
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Ishikawa K, Nash SR, Nishimune A, Neki A, Kaneko S, Nakanishi S. Competitive interaction of seven in absentia homolog-1A and Ca2+/calmodulin with the cytoplasmic tail of group 1 metabotropic glutamate receptors. Genes Cells 1999; 4:381-90. [PMID: 10469171 DOI: 10.1046/j.1365-2443.1999.00269.x] [Citation(s) in RCA: 65] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND Group 1 metabotropic glutamate receptors (mGluR1 and mGluR5) are coupled to inositol trisphosphate/Ca2+ signaling via G proteins and play an important role in excitatory synaptic transmission. To explore the regulation of group 1 mGluR function, we applied the yeast two-hybrid system using the intracellular carboxy-terminal domain of group 1 mGluRs (group 1 ct-mGluRs) and attempted to identify novel protein-protein interactions of group 1 mGluRs. RESULTS The two-hybrid screening revealed a specific interaction between group 1 ct-mGluRs and Siah-1A, the mammalian homolog of Drosophila seven in absentia which is involved in photoreceptor cell differentiation via the ubiquitin/proteasome-dependent mechanism. This interaction occurs within a homologous 27-28 amino acid stretch within group 1 ct-mGluRs and requires the latter two-thirds of Siah-1A. Following coexpression in COS-7 cells, myc-tagged Siah-1A was coimmunoprecipitated with the flag-tagged ct-mGluR1 by anti-flag antibody. Furthermore, in vitro binding revealed that Siah-1A and Ca2+/calmodulin (CaM) binding sites overlap, such that Siah-1A binding is competitively inhibited by CaM in a Ca2+-dependent manner. CONCLUSIONS The results demonstrate a direct interaction between group 1 mGluRs and Siah-1A and suggest a novel modulatory mechanism mediated by a competitive interaction between Ca2+/CaM and Siah-1A.
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Affiliation(s)
- K Ishikawa
- Department of Biological Sciences, Kyoto University Faculty of Medicine, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan
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Ohishi H, Neki A, Mizuno N. Distribution of a metabotropic glutamate receptor, mGluR2, in the central nervous system of the rat and mouse: an immunohistochemical study with a monoclonal antibody. Neurosci Res 1998; 30:65-82. [PMID: 9572581 DOI: 10.1016/s0168-0102(97)00120-x] [Citation(s) in RCA: 179] [Impact Index Per Article: 6.9] [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: 02/07/2023]
Abstract
The distribution of a metabotropic glutamate receptor mGluR2 in the central nervous system was immunohistochemically examined in the rat and mouse with a monoclonal antibody raised against an N-terminal sequence of rat mGluR2 (amino acid residues 87-134). Neuronal cell bodies with mGluR2-like immunoreactivity (mGluR2-LI) were clearly shown in the horizontal cells of Cajal in the cerebral cortex, neurons in the triangular septal nucleus and medial mammillary nucleus, Golgi cells and the unipolar brush cells in the cerebellar cortex, and Golgi-like and unipolar brush-like cells in the cochlear nucleus. Neuropil was intensely immunostained in the accessory olfactory bulb, bed nucleus of the accessory olfactory tract, neocortex, cingulate cortex, retrosplenial cortex, subicular and entorhinal cortices, stratum lacunosum-moleculare of CA1 and CA3, molecular layer of the dentate gyrus, periamygdaloid cortex, basolateral amygdaloid nucleus, bed nucleus of the anterior commissure, caudate-putamen, accumbens nucleus, thalamic reticular nucleus, anteroventral and paraventricular thalamic nuclei, granular layer of the cerebellar cortex, anterior and ventral tegmental nuclei, granular layer of the cochlear nucleus, and parvicellular part of the lateral reticular nucleus. Many axons in the white matter and fiber bundles were also immunostained. No glial cells with mGluR2-LI were found. No particular species differences were found in the distribution pattern of mGluR2-LI between the rat and mouse. The results indicate that mGluR2 is expressed not only in somato-dendritic domain, but also in axonal domain of excitatory and inhibitory neurons.
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Affiliation(s)
- H Ohishi
- Department of Morphological Brain Science, Faculty of Medicine, Kyoto University, Japan
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Shigemoto R, Kinoshita A, Wada E, Nomura S, Ohishi H, Takada M, Flor PJ, Neki A, Abe T, Nakanishi S, Mizuno N. Differential presynaptic localization of metabotropic glutamate receptor subtypes in the rat hippocampus. J Neurosci 1997; 17:7503-22. [PMID: 9295396 PMCID: PMC6573434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/1997] [Revised: 07/14/1997] [Accepted: 07/16/1997] [Indexed: 02/05/2023] Open
Abstract
Neurotransmission in the hippocampus is modulated variously through presynaptic metabotropic glutamate receptors (mGluRs). To establish the precise localization of presynaptic mGluRs in the rat hippocampus, we used subtype-specific antibodies for eight mGluRs (mGluR1-mGluR8) for immunohistochemistry combined with lesioning of the three major hippocampal pathways: the perforant path, mossy fiber, and Schaffer collateral. Immunoreactivity for group II (mGluR2) and group III (mGluR4a, mGluR7a, mGluR7b, and mGluR8) mGluRs was predominantly localized to presynaptic elements, whereas that for group I mGluRs (mGluR1 and mGluR5) was localized to postsynaptic elements. The medial perforant path was strongly immunoreactive for mGluR2 and mGluR7a throughout the hippocampus, and the lateral perforant path was prominently immunoreactive for mGluR8 in the dentate gyrus and CA3 area. The mossy fiber was labeled for mGluR2, mGluR7a, and mGluR7b, whereas the Schaffer collateral was labeled only for mGluR7a. Electron microscopy further revealed the spatial segregation of group II and group III mGluRs within presynaptic elements. Immunolabeling for the group III receptors was predominantly observed in presynaptic active zones of asymmetrical and symmetrical synapses, whereas that for the group II receptor (mGluR2) was found in preterminal rather than terminal portions of axons. Target cell-specific segregation of receptors, first reported for mGluR7a (Shigemoto et al,., 1996), was also apparent for the other group III mGluRs, suggesting that transmitter release is differentially regulated by 2-amino-4-phosphonobutyrate-sensitive mGluRs in individual synapses on single axons according to the identity of postsynaptic neurons.
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Affiliation(s)
- R Shigemoto
- Department of Morphological Brain Science, Kyoto University, Kyoto 606, Japan
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Neki A, Ohishi H, Kaneko T, Shigemoto R, Nakanishi S, Mizuno N. Metabotropic glutamate receptors mGluR2 and mGluR5 are expressed in two non-overlapping populations of Golgi cells in the rat cerebellum. Neuroscience 1996; 75:815-26. [PMID: 8951875 DOI: 10.1016/0306-4522(96)00316-8] [Citation(s) in RCA: 81] [Impact Index Per Article: 2.9] [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: 02/03/2023]
Abstract
The metabotropic glutamate receptor subtypes mGluR2 and mGluR5, which are thought to be coupled respectively to the inhibitory cyclic adenosine monophosphate (cAMP) cascade and the phosphatidylinositol hydrolysis/Ca2+ cascade, are known to be expressed on Golgi cells in the granular layer of the rat cerebellar cortex. In the present immunohistochemical study with a monoclonal antibody against mGluR2 and a polyclonal antibody for mGluR5, we examined whether or not mGluR2- and mGluR5-like immunoreactivities were both present in single Golgi cells in the rat cerebellar cortex. In double immunofluorescence histochemistry, no Golgi cells showed mGluR2- and mGluR5-like immunoreactivities simultaneously. Of the total number of Golgi cells immunoreactive for mGluR2 or mGluR5, about 90% were mGluR2-like immunoreactive, and about 10% were mGluR5-like immunoreactive. Golgi cells with mGluR2-like immunoreactivity were distributed evenly in the granular layer of all the cerebellar regions, while those with mGluR5-like immunoreactivity were distributed more frequently in the I, II, VII-X lobules of the vermis and the copula pyramidis of the hemisphere than in other cerebellar regions. The results indicate that Golgi cells containing mGluR2 are segregated from those possessing mGluR5. These two populations of Golgi cells, each equipped with a different metabolic glutamate receptor coupled to a different intracellular signal transduction system, may play different roles in the glutamatergic neuronal circuits in the cerebellar cortex.
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Affiliation(s)
- A Neki
- Department of Biological Sciences, Faculty of Medicine, Kyoto University, Japan
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Kinoshita A, Ohishi H, Neki A, Nomura S, Shigemoto R, Takada M, Nakanishi S, Mizuno N. Presynaptic localization of a metabotropic glutamate receptor, mGluR8, in the rhinencephalic areas: a light and electron microscope study in the rat. Neurosci Lett 1996; 207:61-4. [PMID: 8710211 DOI: 10.1016/0304-3940(96)12489-7] [Citation(s) in RCA: 51] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The present study indicated presynaptic localization of a metabotropic glutamate receptor, mGluR8, in projection neurons of the main olfactory bulb of rat. An antibody was produced by using a peptide corresponding to C-terminal 23 amino acids of mouse mGluR8. It was confirmed that the C-terminal 23 amino acids of rat mGluR8 were the same as those of mouse mGluR8 except for one, and that the antibody specifically recognized mGluR8 in the rat rhinencephalon. In layer Ia of the piriform cortex (a target area of projection fibers from the main olfactory bulb), mGluR8-like immunoreactivity (mGluR8-LI) was reduced after transection of the lateral olfactory tract, and mGluR8-LI was observed in axon terminals which were filled with round synaptic vesicles and made asymmetric synapses with dendritic spines.
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Affiliation(s)
- A Kinoshita
- Department of Morphological Brain Science, Faculty of Medicine, Kyoto University, Japan
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Li JL, Ohishi H, Kaneko T, Shigemoto R, Neki A, Nakanishi S, Mizuno N. Immunohistochemical localization of a metabotropic glutamate receptor, mGluR7, in ganglion neurons of the rat; with special reference to the presence in glutamatergic ganglion neurons. Neurosci Lett 1996; 204:9-12. [PMID: 8929965 DOI: 10.1016/0304-3940(95)12299-0] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Immunoreactivity for the metabotropic glutamate receptor 7 (mGluR7) and that for phosphate-activated glutaminase (PAG) were examined in the trigeminal (TG), dorsal root (DRG), nodose (NG), superior cervical, celiac, and pelvic ganglia of the rat. Virtually all neuronal cell bodies showed mGluR7-like immunoreactivity (mGluR7-LI) in these ganglia. On the other hand, PAG-like immunoreactivity (PAG) was seen in almost all neuronal cell bodies in the TG, DRG and NG, but not in the other ganglia. Co-existence of mGluR7- and PAG-LI in the TG, DRG and NG was confirmed by a double-immunofluorescence immunohistochemical method. The results indicate that virtually all sensory ganglion neurons are glutamatergic and equipped with mGluR7.
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Affiliation(s)
- J L Li
- Department of Morphological Brain Science, Faculty of Medicine, Kyoto University, Japan
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Neki A, Ohishi H, Kaneko T, Shigemoto R, Nakanishi S, Mizuno N. Pre- and postsynaptic localization of a metabotropic glutamate receptor, mGluR2, in the rat brain: an immunohistochemical study with a monoclonal antibody. Neurosci Lett 1996; 202:197-200. [PMID: 8848265 DOI: 10.1016/0304-3940(95)12248-6] [Citation(s) in RCA: 150] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
A monoclonal antibody against a metabotropic glutamate receptor, mGluR2, was produced by using a glutathione S-transferase (GST) fusion protein containing an N-terminal sequence of rat mGluR2. Intense mGluR2-like immunoreactivity (mGluR2-LI) was seen mainly in neuropil of the cerebral cortical regions, hippocampus, olfactory bulb, some diencephalic nuclei, dorsal cochlear nucleus and cerebellar cortex. In the cerebellar cortex, mGluR2-LI was seen only in Golgi cells. In Ammon's horn, mGluR2-LI was marked in the stratum lucidum of CA3 and the stratum lacunosum-moleculare of CA1-CA3, but not detected in the stratum pyramidale. The results indicate that mGluR2 is located not only presynaptically but also postsynaptically.
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Affiliation(s)
- A Neki
- Department of Biological Sciences, Kyoto University, Japan
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Ohishi H, Nomura S, Ding YQ, Shigemoto R, Wada E, Kinoshita A, Li JL, Neki A, Nakanishi S, Mizuno N. Presynaptic localization of a metabotropic glutamate receptor, mGluR7, in the primary afferent neurons: an immunohistochemical study in the rat. Neurosci Lett 1995; 202:85-8. [PMID: 8787837 DOI: 10.1016/0304-3940(95)12207-9] [Citation(s) in RCA: 134] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
An antibody which recognizes specifically a metabotropic glutamate receptor, mGluR7, was produced by using a trpE fusion protein containing a C-terminal sequence of rat mGluR7. Neuropil in laminae I and II of the dorsal horn of the rat, as well as many neuronal cell bodies in the dorsal root ganglion, showed mGluR7-like immunoreactivity; the immunoreactivity in neuropil was seen in axon terminals, which were filled with round synaptic vesicles and constituted axodendritic and axosomatic asymmetric synapses. The mGluR7-like immunoreactivity in laminae I and II in the dorsal horn was reduced after dorsal rhizotomy. The results indicate that some axon terminals of the primary afferent fibers to laminae I and II of the dorsal horn are provided with mGluR7.
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Affiliation(s)
- H Ohishi
- Department of Morphological Brain Science, Kyoto University, Japan
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Abstract
A chymotrypsin-like protease was purified to homogeneity from human tonsils by a series of chromatographic procedures. The purified enzyme gave a single protein band with an apparent molecular mass of 30 kDa on SDS-PAGE. The sequence of the first 21 amino acids at the N-terminus of the enzyme was determined. A cDNA for the enzyme was cloned by PCR amplification from extracted tonsillar mRNA using a supposed N-terminal oligonucleotide primer and a conserved C-terminal primer of the chymase family. The deduced amino acid sequence of the isolated clone was identical to that of human chymase in connective tissue-type mast cells from heart except for a Ser instead of a Cys at the N-terminal 7th position.
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Affiliation(s)
- Y Sukenaga
- Research Laboratories Pharmaceuticals Group, Nippon Kayaku Co., Tokyo, Japan
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18
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Kajihara J, Matsuo K, Aoyama K, Neki A, Enomoto M, Katoh K. The reactivity of monoclonal antibodies against recombinant human superoxide dismutase. Agric Biol Chem 1990; 54:795-6. [PMID: 1368537] [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: 03/25/2023]
Affiliation(s)
- J Kajihara
- Research Laboratories, Nippon Kayaku Co., Ltd., Tokyo, Japan
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