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Noda S, Harai N, Komai S, Inukai T, Watanabe T, Hosokawa T, Antoku A, Muroi Y, Hayashida R, Okuma H, Suzuki Y, Tsuchiya K. Rapid improvement of severe fatty liver in a case of fulminant type 1 diabetes following insulin treatment. Diabetol Int 2024; 15:297-301. [PMID: 38524939 PMCID: PMC10959847 DOI: 10.1007/s13340-023-00675-5] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Accepted: 11/13/2023] [Indexed: 03/26/2024]
Abstract
A 36-year-old woman presented to the emergency room with a consciousness disorder after developing abdominal pain with diarrhea for 2 days. She presented with marked hyperglycemia, ketoacidosis, and increased serum free fatty acid (FFA) levels; however, no elevation in the glycated hemoglobin (HbA1c) levels was observed. Based on the marked depletion of insulin secretion, the patient was diagnosed as diabetic ketoacidosis attributed to fulminant type 1 diabetes (FT1D). Computed tomography on admission revealed severe fatty liver (FL), which improved 17 h following insulin treatment. Insulin treatment also suppressed the serum FFA levels. Some cases of FT1D with FL and liver dysfunction have been reported previously; however, its pathogenesis and clinical course remain unclear. Compared to previous reports, this case reported the shortest time for FL improvement. In this case, rapid and severe insulin deficiency led to a markedly high FFA level and significant accumulation of triglycerides in the hepatocytes, resulting in severe FL. A rapid and large dose of insulin was administered when systemic insulin sensitivity was nearly maximal owing to insulin deficiency, increased insulin efficacy, early reduction of FFA, suppressed triglyceride accumulation in the hepatocytes, and increased triglyceride excretion from the liver. All these factors could have contributed to the rapid improvement in FL.
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Affiliation(s)
- Sonomi Noda
- Department of Diabetes and Endocrinology, University of Yamanashi Hospital, 1110 Shimokato, Chuo-shi, Yamanashi, 4093898 Japan
| | - Nozomi Harai
- Department of Diabetes and Endocrinology, University of Yamanashi Hospital, 1110 Shimokato, Chuo-shi, Yamanashi, 4093898 Japan
| | - Saki Komai
- Department of Diabetes and Endocrinology, University of Yamanashi Hospital, 1110 Shimokato, Chuo-shi, Yamanashi, 4093898 Japan
| | - Takahiko Inukai
- Department of Diabetes and Endocrinology, University of Yamanashi Hospital, 1110 Shimokato, Chuo-shi, Yamanashi, 4093898 Japan
| | - Tomomi Watanabe
- Department of Diabetes and Endocrinology, University of Yamanashi Hospital, 1110 Shimokato, Chuo-shi, Yamanashi, 4093898 Japan
| | - Tadatsugu Hosokawa
- Department of Diabetes and Endocrinology, University of Yamanashi Hospital, 1110 Shimokato, Chuo-shi, Yamanashi, 4093898 Japan
| | - Airi Antoku
- Department of Diabetes and Endocrinology, University of Yamanashi Hospital, 1110 Shimokato, Chuo-shi, Yamanashi, 4093898 Japan
| | - Yuko Muroi
- Department of Diabetes and Endocrinology, University of Yamanashi Hospital, 1110 Shimokato, Chuo-shi, Yamanashi, 4093898 Japan
| | - Ryosuke Hayashida
- Department of Diabetes and Endocrinology, University of Yamanashi Hospital, 1110 Shimokato, Chuo-shi, Yamanashi, 4093898 Japan
| | - Hideyuki Okuma
- Department of Diabetes and Endocrinology, University of Yamanashi Hospital, 1110 Shimokato, Chuo-shi, Yamanashi, 4093898 Japan
| | - Yuichiro Suzuki
- Department of Gastroenterology Faculty of Medicine, University of Yamanashi Hospital, 1110 Shimokato, Chuo-shi, Yamanashi, 4093898 Japan
| | - Kyoichiro Tsuchiya
- Department of Diabetes and Endocrinology, University of Yamanashi Hospital, 1110 Shimokato, Chuo-shi, Yamanashi, 4093898 Japan
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Inukai T, Harai N, Nakagawa Y, Hosokawa T, Antoku A, Muroi Y, Ogiwara M, Tsuchiya K. Subclinical Cushing's Disease with High-Molecular-Weight Forms of Adrenocorticotropic Hormone Production. Case Rep Endocrinol 2024; 2024:8721614. [PMID: 38566858 PMCID: PMC10985640 DOI: 10.1155/2024/8721614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 12/28/2023] [Accepted: 02/24/2024] [Indexed: 04/04/2024] Open
Abstract
Production of the high-molecular-weight forms of adrenocorticotropic hormone (big-ACTH) has been reported in a small number of ectopic ACTH syndrome and ACTH-producing pituitary macroadenoma. However, perioperative changes in big-ACTH in patients with subclinical Cushing's disease have not been reported. A 63-year-old woman presented 25 × 20 × 20-mm-sized macroadenoma in the pituitary gland. Her early morning plasma ACTH and cortisol levels were 111 pg/mL and 11.6 μg/dL, respectively. Cushingoid features and diurnal variation in plasma cortisol levels were not observed. The patient's urinary free cortisol (UFC) was 59.3 μg/day. The corticotropin-releasing hormone (CRH) test showed that plasma ACTH levels were 1.5 times higher than the preload value. The overnight dexamethasone suppression test (DST) showed that the plasma cortisol level was not suppressed by 0.5 mg of dexamethasone (DEX) but was suppressed by 8 mg of DEX. Inferior pyramidal sinus sampling was consistent with Cushing's disease. Taken together, the patient was clinically diagnosed with subclinical Cushing's disease caused by an ACTH-producing pituitary adenoma. Endoscopic transsphenoidal adenomectomy was performed. In the postoperative CRH test, plasma ACTH levels showed six-fold increase. The postoperative DST showed cortisol suppression at 0.5 mg of DEX. The UFC levels decreased to 35.1 μg/day. Pituitary contrast-enhanced MRI revealed no residual tumor, and plasma ACTH and cortisol levels remained within normal ranges. Gel filtration of preoperative and postoperative plasma ACTH was performed, and a high molecular weight fraction of ACTH was detected, which markedly decreased postoperatively. The absence of Cushingoid features and the lack of significant cortisol hypersecretion in this case were thought to be due in part to big-ACTH, which has low bioactivity. By careful evaluation of laboratory and clinical findings, we identified it as a big-ACTH-producing adenoma. This is the first report of a case in which the big-ACTH transition was observed perioperative and is a valuable case.
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Affiliation(s)
- Takahiko Inukai
- Department of Diabetes and Endocrinology, University of Yamanashi Hospital, Yamanashi, Japan
| | - Nozomi Harai
- Department of Diabetes and Endocrinology, University of Yamanashi Hospital, Yamanashi, Japan
| | - Yukie Nakagawa
- Department of Diabetes and Endocrinology, University of Yamanashi Hospital, Yamanashi, Japan
| | - Tadatsugu Hosokawa
- Department of Diabetes and Endocrinology, University of Yamanashi Hospital, Yamanashi, Japan
| | - Airi Antoku
- Department of Diabetes and Endocrinology, University of Yamanashi Hospital, Yamanashi, Japan
| | - Yuko Muroi
- Department of Diabetes and Endocrinology, University of Yamanashi Hospital, Yamanashi, Japan
| | - Masakazu Ogiwara
- Department of Neurosurgery, University of Yamanashi Hospital, Yamanashi, Japan
| | - Kyoichiro Tsuchiya
- Department of Diabetes and Endocrinology, University of Yamanashi Hospital, Yamanashi, Japan
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Brozmanova M, Svajdova S, Pavelkova N, Muroi Y, Undem B, Kollarik M. The voltage-gated sodium channel NaV1.8 blocker A-803467 inhibits cough in the guinea pig. Respir Physiol Neurobiol 2019; 270:103267. [DOI: 10.1016/j.resp.2019.103267] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Revised: 07/17/2019] [Accepted: 08/05/2019] [Indexed: 10/26/2022]
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Abstract
Compressive stress may be involved in temporomandibular joint (TMJ) synovitis, but its mechanism has not been fully elucidated. We hypothesized that mechanical stress to the synovial cells of the TMJ potentially causes degenerative changes in temporomandibular joint disease. We examined the effect of cyclic compressive loading on three-dimensionally engineered constructs using human TMJ synovium-derived cells in vitro. Human TMJ synovium-derived cells were cultured onto collagen scaffolds, resulting in three-dimensional constructs. Cyclic compression loading was applied to the constructs by means of a custom-designed apparatus. DNA amount, apoptotic cells, and mRNA levels for inflammatory cytokines were analyzed. The protein expression and activity of MMPs were examined. DNA amount or apoptotic cell number was unchanged by loading. MMP-2, -3, and IL-8 mRNA expression was up-regulated by the compression, and both MMP-1 and -3 protein expression and MMP-2 activity were detected. Thus, compression of human TMJ synovium-derived cells appears to modulate inflammatory cytokines.
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Affiliation(s)
- Y Muroi
- Second Department of Oral and Maxillofacial Surgery, Osaka Dental University, 1-5-17, Otemae, Chuo-ku, Osaka, 540-0008, Japan.
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Muroi M, Muroi Y, Ito N, Rice N, Suzuki T. Effects of protease inhibitors on LPS-mediated activation of a mouse macrophage cell line (J774). ACTA ACUST UNITED AC 2016. [DOI: 10.1177/096805199500200504] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Pretreatment (1 h) of a mouse macrophage-like cell line, J774, with the protease inhibitor, phenylalanine-chloromethyl ketone (PCK) or its structural analogue, tosylphenylalanine chloromethyl ketone (TPCK) was found to cause substantial inhibition of LPS-triggered activation of NF-κB. Pretreatment of cells with other types of protease inhibitors or their various structural analogues had no effect. PCK or TPCK appeared to exert its inhibitory effect by: (i) partially preventing LPS-triggered degradation of IκBα protein; (ii) preventing LPS-triggered nuclear translocation of NF-κB proteins (p50, RelA and Rel); and (iii) inhibiting the DNA-binding activities of NF-κB proteins. Pretreatment of cells with PCK or TPCK also resulted in the total or partial inhibition of LPS activatable (AP-1 or CREB) or constitutively-existing (Oct-1) transcription factors, but not of another constitutively-expressed transcription factor (SP-1). Pretreatment of J774 cells with PCK was found to substantially suppress LPS-induced expression of mRNAs specific for cytokine genes (TNFα, IL-1α and β, and IL-6), inducible nitric oxide synthase (iNOS) gene and IκBα gene, but not NF-κB1 p105 gene or β-actin gene. Furthermore, PCK pretreatment inhibited, in a dose-dependent manner, LPS-triggered production of nitric oxide production and tumoricidal activity.
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Affiliation(s)
- M. Muroi
- Department of Microbiology, Molecular Genetics and Immunology, University of Kansas Medical Center, Kansas City, Kansas, Laboratory of Molecular Virology and Carcinogenesis, ABL-Basic Research Program, NCI-Frederick Cancer Research and Development Center, Frederick, Maryland, USA
| | - Y. Muroi
- Department of Microbiology, Molecular Genetics and Immunology, University of Kansas Medical Center, Kansas City, Kansas, Laboratory of Molecular Virology and Carcinogenesis, ABL-Basic Research Program, NCI-Frederick Cancer Research and Development Center, Frederick, Maryland, USA
| | - N. Ito
- Department of Microbiology, Molecular Genetics and Immunology, University of Kansas Medical Center, Kansas City, Kansas, Laboratory of Molecular Virology and Carcinogenesis, ABL-Basic Research Program, NCI-Frederick Cancer Research and Development Center, Frederick, Maryland, USA
| | - N.R. Rice
- Department of Microbiology, Molecular Genetics and Immunology, University of Kansas Medical Center, Kansas City, Kansas, Laboratory of Molecular Virology and Carcinogenesis, ABL-Basic Research Program, NCI-Frederick Cancer Research and Development Center, Frederick, Maryland, USA
| | - T. Suzuki
- Department of Microbiology, Molecular Genetics and Immunology, University of Kansas Medical Center, Kansas City, Kansas, Laboratory of Molecular Virology and Carcinogenesis, ABL-Basic Research Program, NCI-Frederick Cancer Research and Development Center, Frederick, Maryland, USA
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Inaba A, Komori Y, Muroi Y, Kinoshita K, Ishii T. Neuropeptide Y signaling in the dorsal raphe nucleus inhibits male sexual behavior in mice. Neuroscience 2016; 320:140-8. [DOI: 10.1016/j.neuroscience.2016.01.069] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Revised: 01/28/2016] [Accepted: 01/30/2016] [Indexed: 12/22/2022]
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Kollarik M, Carr MJ, Ru F, Ring CJA, Hart VJ, Murdock P, Myers AC, Muroi Y, Undem BJ. Transgene expression and effective gene silencing in vagal afferent neurons in vivo using recombinant adeno-associated virus vectors. J Physiol 2010; 588:4303-15. [PMID: 20736420 DOI: 10.1113/jphysiol.2010.192971] [Citation(s) in RCA: 23] [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] [Indexed: 12/11/2022] Open
Abstract
Vagal afferent fibres innervating thoracic structures such as the respiratory tract and oesophagus are diverse, comprising several subtypes of functionally distinct C-fibres and A-fibres. Both morphological and functional studies of these nerve subtypes would be advanced by selective, effective and long-term transduction of vagal afferent neurons with viral vectors. Here we addressed the hypothesis that vagal sensory neurons can be transduced with adeno-associated virus (AAV) vectors in vivo, in a manner that would be useful for morphological assessment of nerve terminals, using enhanced green fluorescent protein (eGFP), as well as for the selective knock-down of specific genes of interest in a tissue-selective manner. We found that a direct microinjection of AAV vectors into the vagal nodose ganglia in vivo leads to selective, effective and long-lasting transduction of the vast majority of primary sensory vagal neurons without transduction of parasympathetic efferent neurons. The transduction of vagal neurons by pseudoserotype AAV2/8 vectors in vivo is sufficiently efficient such that it can be used to functionally silence TRPV1 gene expression using short hairpin RNA (shRNA). The eGFP encoded by AAV vectors is robustly transported to both the central and peripheral terminals of transduced vagal afferent neurons allowing for bright imaging of the nerve endings in living tissues and suitable for structure-function studies of vagal afferent nerve endings. Finally, the AAV2/8 vectors are efficiently taken up by the vagal nerve terminals in the visceral tissue and retrogradely transported to the cell body, allowing for tissue-specific transduction.
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Affiliation(s)
- M Kollarik
- The Johns Hopkins School of Medicine, Baltimore, MD 21224, USA
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Muroi Y, Ishii T, Komori S, Kitamura N, Nishimura M. Volatile female odors activate the accessory olfactory system of male mice without physical contact. Neuroscience 2006; 141:551-558. [PMID: 16735093 DOI: 10.1016/j.neuroscience.2006.04.026] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [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: 11/03/2005] [Revised: 03/18/2006] [Accepted: 04/16/2006] [Indexed: 01/18/2023]
Abstract
We previously reported that male mice are more attracted to volatile odors from intact female mice than from ovariectomized female mice. In the present study, we investigated male attraction to volatile odors from soiled bedding collected from the cages of estrous or ovariectomized female mice. There was no difference in the total time spent sniffing volatile odors from estrous and ovariectomized female mice, suggesting that female mice emit volatile odors which are not excreted into bedding. To test this possibility, we investigated c-Fos expression in the mitral cell layer and granule cell layer of the accessory olfactory bulb 60 min after exposure of male mice to volatile odors without physical contact. Volatile odors from an estrous female mouse significantly increased the total number of c-Fos positive cells in each of the rostral and caudal granule cell layer, but not in the mitral cell layer. After exposure to volatile odors from estrous bedding, the total number of c-Fos positive cells did not increase. Volatile odors from a male mouse did not increase the total number of c-Fos positive cells. Volatile odors from an ovariectomized female mouse increased c-Fos expression only in the caudal granule cell layer. These results suggest that female mice emit specific volatile odors which are not excreted into bedding, and that the volatile odors activate the accessory olfactory system of male mice without physical contact. To characterize the female-specific volatile odors, we conducted habituation-dishabituation tests. Whereas sham-operated male mice discriminated between volatile odors of estrous and ovariectomized female mice, vomeronasal organ-removed male mice did not. These results suggest that male mice discriminated whether or not female mice were ovariectomized, by volatile odors via the accessory olfactory system, and that the female-specific volatile odors are involved in reproduction.
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Affiliation(s)
- Y Muroi
- Department of Pathogenetic Veterinary Science, The United Graduate School of Veterinary Sciences, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan.
| | - T Ishii
- Department of Pathogenetic Veterinary Science, The United Graduate School of Veterinary Sciences, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan; The Laboratory of Pharmacology, Department of Pathobiological Science, School of Veterinary Science, Faculty of Animal Husbandry, Obihiro University of Agriculture and Veterinary Medicine, Obihiro Hokkaido 080-8555, Japan
| | - S Komori
- Department of Pathogenetic Veterinary Science, The United Graduate School of Veterinary Sciences, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan; Department of Veterinary Medicine, Faculty of Applied Biological Sciences, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - N Kitamura
- Department of Basic Veterinary Science, The United Graduate School of Veterinary Sciences, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan; The Laboratory of Anatomy, Department of Basic Veterinary Science, School of Veterinary Science, Faculty of Animal Husbandry, Obihiro University of Agriculture and Veterinary Medicine, Obihiro Hokkaido 080-8555, Japan
| | - M Nishimura
- Department of Pathogenetic Veterinary Science, The United Graduate School of Veterinary Sciences, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan; The Laboratory of Pharmacology, Department of Pathobiological Science, School of Veterinary Science, Faculty of Animal Husbandry, Obihiro University of Agriculture and Veterinary Medicine, Obihiro Hokkaido 080-8555, Japan
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Katakai D, Fujie H, Muroi Y, Nakata K. Mechanical properties of synovial cell-seeded 3-D constructs for cartilage regeneration: Effects of cyclic compressive stress. J Biomech 2006. [DOI: 10.1016/s0021-9290(06)83813-3] [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: 10/24/2022]
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Muroi Y, Nakata K, Nakamura N, Ando W, Tateishi K, Yoshikawa H, Kakudo K. Development and characterization of three-dimensional culture system of the synovium-derived stem cells in a collagen scaffold with collagen gel for tissue engineering and reproductive medicine. Int J Oral Maxillofac Surg 2005. [DOI: 10.1016/s0901-5027(05)81438-9] [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: 10/24/2022]
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Muroi M, Muroi Y, Suzuki T. The binding of immobilized IgG2a to Fc gamma 2a receptor activates NF-kappa B via reactive oxygen intermediates and tumor necrosis factor-alpha 1. J Biol Chem 1994; 269:30561-8. [PMID: 7982975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
The macrophage-like cell line, J774, was found to respond to immobilized mouse monoclonal IgG2a proteins, but not to soluble forms of IgG2a or IgG2b or to immobilized F(ab')2 of IgG2a, by the increase in the nuclear proteins of two different types of NF-kappa B proteins which differed in their electrophoretic mobilities. Fc gamma 2a receptor-mediated activation of NF-kappa B was blocked by the presence of pyrrolidinedithiocarbamate, neutralizing anti-tumor necrosis factor (TNF)-alpha antibodies, various protein kinase inhibitors (H-89, genistein, or heparin) or intracellular calcium chelator (1,2-bis(O-aminophenoxy)-ethane-N,N,N',N'-tetraacetic acid tetra-(acetoxymethyl)-ester, BAPTA/AM) during stimulation. J774 cells were also found to respond to immobilized IgG2a, but not IgG2b, by the increased production of superoxide, H2O2, and TNF-alpha. Fc gamma 2aR-induced production of H2O2 was inhibited by pretreatment of the cells with pyrrolidinedithiocarbamate, H-89, genistein, heparin, or BAPTA/AM, but not with anti-TNF-alpha antibody. Fc gamma 2aR-induced production of TNF-alpha was, on the other hand, not inhibited by pretreatment of the cells with BAPTA/AM. Although J774 cells responded to exogenously added rTNF-alpha, but not to H2O2, by activation of NF-kappa B, the recombinant TNF-alpha-mediated NF-kappa B activation was enhanced by simultaneous presence of H2O2. These results thus suggest that macrophages respond to the stimulation of Fc gamma 2aR by the production of both reactive oxygen intermediates and TNF-alpha and that endogenous TNF-alpha activates NF-kappa B via the pathway involving reactive oxygen intermediates.
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Affiliation(s)
- M Muroi
- Department of Microbiology, Molecular Genetics and Immunology, University of Kansas Medical Center, Kansas City 66160-7420
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Muroi M, Muroi Y, Suzuki T. The binding of immobilized IgG2a to Fc gamma 2a receptor activates NF-kappa B via reactive oxygen intermediates and tumor necrosis factor-alpha 1. J Biol Chem 1994. [DOI: 10.1016/s0021-9258(18)43850-1] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Muroi M, Muroi Y, Yamamoto K, Suzuki T. Influence of 3' half-site sequence of NF-kappa B motifs on the binding of lipopolysaccharide-activatable macrophage NF-kappa B proteins. J Biol Chem 1993; 268:19534-9. [PMID: 8366097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
Lipopolysaccharide treatment of mouse macrophage-like J774 cells was found to result in the activation of three different nuclear proteins which specifically bind to oligonucleotide containing the NF-kappa B motif of the human immunodeficiency virus (HIV) gene. These are designated as NF-kappa B1, -kappa B2, and -kappa B3, according to their electrophoretic mobilities (fast, intermediate, and slow, respectively). Immunological and UV cross-linking studies showed that NF-kappa B1 consists of only p50 subunit, whereas both NF-kappa B2 and -kappa B3 contain NF-kappa B p65 subunit and c-Rel. In addition, NF-kappa B2 was also found to contain p50 subunit of NF-kappa B. The binding of three types of NF-kappa B proteins to HIV NF-kappa B motif was effectively inhibited by other NF-kappa B motifs, whose 3' half-site nucleotide sequences are T/A-T-T/C-CC (HIV, interleukin-6, interferon (INF)-beta, H2-Kb, I-E alpha d, and TNF-alpha 2 (nucleotide position -510)) and much less effectively by NF-kappa B motifs with 3' half-site sequences of TGCCC (TNF-alpha 3, nucleotide position -610), ATCTC (G-CSF), TATTC (Fc gamma R), or TCCTT (TNF-alpha 1, nucleotide position -850). Our data also suggested that NF-kappa B1 and -kappa B2 which contain p50 subunit of NF-kappa B bind with the higher preference for NF-kappa B motif of H2-Kb gene promoter than that of INF-beta, whereas NF-kappa B3 which does not contain p50 subunit appears to preferentially bind to NF-kappa B sites of IFN-beta.
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Affiliation(s)
- M Muroi
- Department of Microbiology, University of Kansas Medical Center, Kansas City 66160-7420
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Muroi M, Muroi Y, Yamamoto K, Suzuki T. Influence of 3' half-site sequence of NF-kappa B motifs on the binding of lipopolysaccharide-activatable macrophage NF-kappa B proteins. J Biol Chem 1993. [DOI: 10.1016/s0021-9258(19)36548-2] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Fujihara M, Muroi M, Muroi Y, Ito N, Suzuki T. Mechanism of lipopolysaccharide-triggered junB activation in a mouse macrophage-like cell line (J774). J Biol Chem 1993; 268:14898-905. [PMID: 8392062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
The effect of lipopolysaccharide (LPS) on the activation of junB in a mouse macrophage cell line (J774) was investigated. J774 cells responded to either phorbol 12-myristate 13-acetate (PMA) or LPS by the transient increase in the expression levels of c-jun and junB mRNA, but not of junD mRNA. The prior depletion of protein kinase C from J774 cells blocked the action of PMA, but not of LPS, to activate junB. Pretreatment of cells with H-89 or H-7, but not with HA1004, W-7, ML-7, or tyrphostin 47, inhibited LPS-triggered junB activation. Treatment with forskolin also activated junB of J774 cells through an H-89- or H-7-sensitive pathway. Since cAMP-dependent protein kinase activity of J774 cells was inhibited by H-89, but not by H-7, LPS appears to activate junB through a cascade involving two steps, the one sensitive to H-89 and the other to H-7. Western blot analysis showed that LPS-triggered junB activation is accompanied by the increased expression of JunB proteins in the cell lysate as well as in the nuclear extract. JunB in nuclear fraction appears to specifically bind to 12-O-tetradecanoylphorbol-13-acetate-response element (TRE), since preincubation of nuclear extracts with anti-JunB serum reduced the amount of TRE-binding proteins and since the amount of JunB, but not of c-Jun or JunD, immunoprecipitated from TRE-cross-linked nuclear proteins increased in response to LPS. Thus, JunB may play an important role in LPS-triggered gene activation.
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Affiliation(s)
- M Fujihara
- Department of Microbiology, Molecular Genetics, and Immunology, University of Kansas Medical Center, Kansas City 66160-7420
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Fujihara M, Muroi M, Muroi Y, Ito N, Suzuki T. Mechanism of lipopolysaccharide-triggered junB activation in a mouse macrophage-like cell line (J774). J Biol Chem 1993. [DOI: 10.1016/s0021-9258(18)82418-8] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Kawahara H, Nagano H, Muroi Y. [Case of epidermoid cyst originating from the cauda equina]. Seikei Geka 1969; 20:1579-82. [PMID: 5390967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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