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Endo S, Yamada T, Kobayashi T, Naganawa Y, Tabuchi T, Shinmoto H. Tomato endo beta-mannanase: A candidate of potential tomato allergen protein detected with human monoclonal antibody established from a patient suffered from Japanese cedar pollinosis. Hum Antibodies 2018; 27:125-128. [PMID: 30594924 DOI: 10.3233/hab-180357] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Peripheral blood lymphocytes from a patient allergic to Japanese cedar pollens were transformed by Epstein-Barr virus infection. Some transformed B-lymphoblastoid cells (BLCs) secreted IgM class antibodies to cedar pollen extracts and tomato fruit extracts. One stable human-mouse hybridoma clone Y-22-3-3 secreting IgM class monoclonal antibody to tomato fruit extracts was established by cell fusion of BLCs with mouse myeloma cells. Western blot analysis of tomato extracts showed Y-22-3-3 monoclonal antibody recognized a tomato protein with a molecular weight of 40 kDa. The CBB-stained 40 kDa protein from antibody-affinity chromatography was analyzed by MALDI-TOF/TOF, and identified as tomato endo-beta-mannanase, which was previously reported as one of the potential candidates for tomato allergens.
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Naganawa Y, Ohsugi K, Kase R, Date I, Sakuraba H, Sakuragawa N. In Vitro Study of Encapsulation Therapy for Fabry Disease Using Genetically Engineered CHO Cell Line. Cell Transplant 2017. [DOI: 10.3727/000000002783985846] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Fabry disease is an X-linked recessive disorder caused by a deficiency of the lysosomal hydrolase α-galac-tosidase A (α-gal). The deficiency of this enzyme leads to the systemic deposition of ceramide trihexoside (CTH) in various tissues and organs. Enzyme replacement using IV doses of recombinant human α-gal produced in CHO cells or in human fibroblasts is currently being evaluated in clinical trials as a potential therapy for this disease. However, it requires lifelong therapy involving a large amount of purified α-gal. As a novel approach for treatment of Fabry disease we used polymer encapsulated Chinese hamster ovary (CHO) cells genetically modified to express α-gal. The secreted high levels of α-gal passed through the semipermeable polymeric membrane. Using coculture system with Fabry fibroblasts, the secreted enzyme was taken up in cells, resulting in reduced accumulation of CTH in Fabry fibroblasts. This in vitro study demonstrated that an encapsulated α-gal-secreting cell line can be used to treat Fabry mice by transplantation in vivo. Judging from the protection against immune rejection by a semipermeable synthetic membrane, this novel approach may be applied to treat patients with Fabry disease and other lysosomal storage diseases.
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Affiliation(s)
- Y. Naganawa
- Department of Inherited Metabolic Disease, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Kodiara, Tokyo 187-8502, Japan
| | - K. Ohsugi
- Department of Inherited Metabolic Disease, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Kodiara, Tokyo 187-8502, Japan
| | - R. Kase
- Department of Clinical Genetics, Tokyo Metropolitan Institute of Medical Science, Tokyo Metropolitan Organization for Medical Research, Tokyo 113-8613, Japan
| | - I. Date
- Department of Neurological Surgery, Okayama University Medical School, Okayama 700-8558, Japan
| | - H. Sakuraba
- Department of Clinical Genetics, Tokyo Metropolitan Institute of Medical Science, Tokyo Metropolitan Organization for Medical Research, Tokyo 113-8613, Japan
| | - N. Sakuragawa
- Department of Inherited Metabolic Disease, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Kodiara, Tokyo 187-8502, Japan
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Chiba S, Yokoyama H, Kumazawa A, Shimmoto M, Naganawa Y, Shinmoto H. Epitope analysis of Japanese cedar pollen allergen Cry j2 with a human IgM class monoclonal antibody 404-117. Hum Antibodies 2016; 25:17-21. [PMID: 27858705 DOI: 10.3233/hab-160301] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Japanese cedar pollen allergen Cry j2 is a causal allergen of seasonal pollinosis in Japan. To analyze B cell epitopes of Cry j2, we established two human-mouse hybridomas secreting IgM class human monoclonal antibodies to Cry j2. A pin-peptide enzyme-linked immunosorbent assay with synthesized icosa peptides showed that 404-117 monoclonal antibody bound to peptides #11-13 with cry j2 amino acid sequence of 101F-L140. Detailed analysis with octa peptides and alanine substituted peptides indicated that an amino acid sequence of 118FKVD121 was an essential for antibody binding. When K119 (Asn) was substituted with alanine, 404-117 monoclonal antibody did not bind to the alanine substituted peptide. We concluded that the 118FKVD121 sequence might have a very important role in early recognition by Cry j2-specific B cells, which could act as antigen presenting cells.
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Affiliation(s)
- Seiya Chiba
- Tamagawa University, College of Agriculture, Machida, Tokyo, Japan
| | - Haruka Yokoyama
- Tamagawa University, College of Agriculture, Machida, Tokyo, Japan
| | - Ayane Kumazawa
- Tamagawa University, College of Agriculture, Machida, Tokyo, Japan
| | - Michie Shimmoto
- Tokyo Metropolitan Institute of Medical Science, Setagaya-ku, Tokyo, Japan
| | | | - Hiroshi Shinmoto
- Tamagawa University, College of Agriculture, Machida, Tokyo, Japan
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Shinmoto H, Yamaguchi Y, Ito M, Hoshizaki R, Naganawa Y. Anti-Adipogenic Activity of Berberine in 3T3-L1 Pre-Adipocytes Cultured in High-Glucose Medium. J JPN SOC FOOD SCI 2016. [DOI: 10.3136/nskkk.63.474] [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: 11/03/2022]
Affiliation(s)
| | | | - Manami Ito
- School of Agriculture, Tamagawa University
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Shinmoto H, Ichikawa Y, Nagata S, Miura M, Naganawa Y, Takano-Ishikawa Y. PAGE-Analysis of Milk Allergens after Heating on Stainless Steel Tray. J JPN SOC FOOD SCI 2013. [DOI: 10.3136/nskkk.60.233] [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: 11/03/2022]
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Naganawa Y, Takeda M, Shimmoto M, Shinmoto H. Epitope analysis of Japanese cedar pollen allergen Cry j1 with the human monoclonal antibody 4701-1. Hum Antibodies 2013; 22:73-6. [PMID: 24961865 DOI: 10.3233/hab-140273] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
We obtained a stable human-mouse hybridoma clone 4701-1 secreting IgM class human monoclonal antibody to Japanese cedar pollen allergen Cry j1. A pin-peptide enzyme-linked immunosorbent assay (ELISA) with synthesized pentadeca peptides showed a peptide with an amino acid sequence of LYTVT NSDDD PVNPA was found to be positive. Detailed analysis with deca to tetra peptides indicated that an amino acid sequence of TVTN was an essential sequence for antibody binding. When N (Asn) was substituted with A (Ala) of the TVTN epitope, the resulting peptide did not have antibody binding ability. We concluded that the TVTN sequence might have a very important role in early recognition of Cry j1 allergen by Cry j1-specific B cells, which act as antigen presenting cells.
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Affiliation(s)
| | - Mio Takeda
- College of Agriculture, Tamagawa University, Machida, Tokyo, Japan
| | - Michie Shimmoto
- Tokyo Metropolitan Institute of Medical Science, Setagaya-ku, Tokyo, Japan
| | - Hiroshi Shinmoto
- College of Agriculture, Tamagawa University, Machida, Tokyo, Japan
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Shinmoto H, Takeda M, Matsuo Y, Naganawa Y, Tomita S, Takano-Ishikawa Y. Epitope analysis of peanut allergen Ara h1 with human monoclonal IgM antibody clone #86. Hum Antibodies 2010; 19:101-105. [PMID: 21178281 DOI: 10.3233/hab-2010-0233] [Citation(s) in RCA: 3] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A human-mouse hybridoma clone #86 secreting IgM-class human monoclonal antibody to peanut allergen protein Ara h1 was newly established. To detect an antibody-binding sequence (epitope) on Ara h1, the monoclonal antibody #86 was reacted with multi-pin apparatus with a series of peptides synthesized from the amino acid sequence of Ara h1. The antibody #86 was found to bind to a peptide with amino acid sequence of 481EEEEDEDEEEEGSNREVRRY500. Further analysis with shorter pin-peptides with ten amino acid-long showed that the peptides reacted with the antibody #86 contained a sequence of 485DEDEEEE491. This might be an essential linear sequence of this epitope. When the 485DED487 part of the peptide was replaced by alanine, decreased binding of antibody #86 was observed.
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Shinmoto H, Takase M, Naganawa Y, Takano-Ishikawa Y. Production of IgE antibody to Japanese cedar pollen allergen Cry j1 by short term culture of human peripheral blood lymphocytes. Hum Antibodies 2009; 18:41-43. [PMID: 19478398 DOI: 10.3233/hab-2009-0197] [Citation(s) in RCA: 1] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Peripheral blood lymphocytes (PBL) from a patient allergic to Japanese cedar pollens, were stimulated with IL-4, IL-13, CD40-Ligand and/or hydrocortisone in the presence of Epstein-Barr virus in 96-well round bottomed culture plates, and the secretion of IgE-class antibody against a Japanese cedar pollen allergen Cry j1 in the supernatants were examined. PBL cultured with IL-4, and IL-4 + CD40-Ligand showed the highest IgE secretion and the cultures were maintained for 30 days. However, we failed to expand the culture with high IgE secretion. It was suggested that patient's PBL stimulated with IL-4 were useful for short term IgE production to Cry j1.
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Affiliation(s)
- Hiroshi Shinmoto
- School of Agriculture, Tamagawa University, Machida, Tokyo, Japan.
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Naganawa Y, Shimmoto M, Maleki SJ, Takase M, Shinmoto H. Epitope analysis of peanut allergen Ara h1 with oligoclonal IgM antibody from human B-lymphoblastoid cells. Cytotechnology 2008; 57:177-80. [PMID: 19003163 DOI: 10.1007/s10616-008-9142-3] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2007] [Accepted: 03/11/2008] [Indexed: 11/29/2022] Open
Abstract
To analyze epitopes of peanut allergen Ara h1, Epstein-Barr virus-transformed human peripheral oligoclonal B-cells were cultured to obtain antibodies to Ara h1. The combined reaction pattern with six oligoclonal antibodies showed there were six antibody binding areas named a to f in Ara h1. We found the novel antibody binding area named "area c" (171-230aa).
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Affiliation(s)
- Yasunori Naganawa
- Nagahama Institute of Bio-Science and Technology, 1266 Tamura-cho, Nagahama, Shiga, 526-0829, Japan,
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Shinmoto H, Naganawa Y, Shimmoto M, Maleki SJ. Generation of mouse-human hybridomas secreting antibodies against peanut allergen Ara h1. Cytotechnology 2005; 46:19-23. [PMID: 19003255 DOI: 10.1007/s10616-005-1578-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2004] [Accepted: 01/24/2005] [Indexed: 11/26/2022] Open
Abstract
Two clones of mouse-human hybridomas, secreting human monoclonal antibodies to a peanut allergen Ara h1, were generated from human peripheral blood lymphocytes transformed with Epstein--Barr virus, followed by cell fusion with mouse myeloma cells. Epitope analysis with overlapping peptides synthesized on a multi-pin apparatus revealed antibody-binding sequences of Ara h1 protein.
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Affiliation(s)
- Hiroshi Shinmoto
- National Food Research Institute, 2-1-12 Kannondai, Tsukuba, Ibaraki, 305-8642, Japan,
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Naganawa Y, Shinmoto H, Shimmoto M. Generation of mouse-human hybridomas secreting human monoclonal antibodies to Japanese cedar pollen allergen Cry j1. Hum Antibodies 2005; 14:27-31. [PMID: 16424598] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Peripheral blood lymphocytes from 13 donors were transformed with Epstein-Barr virus (EBV) to establish immortalized human B-cells secreting antibodies to Japanese cedar (Cryptomeria japonica) pollen allergens. EBV-transformed B-lymphocytes were then fused with mouse myeloma SP2/O3, and three clones of mouse-human hybridomas secreting human IgM class monoclonal antibodies to a cedar pollen allergen Cry j1 were established.
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Affiliation(s)
- Yasunori Naganawa
- National Food Research Institute, 2-1-12 Kannondai, Tsukuba, Ibaraki, 305-8642, Japan
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Naganawa Y, Ohsugi K, Kase R, Date I, Sakuraba H, Sakuragawa N. In vitro study of encapsulation therapy for Fabry disease using genetically engineered CHO cell line. Cell Transplant 2003; 11:325-9. [PMID: 12162373] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/26/2023] Open
Abstract
Fabry disease is an X-linked recessive disorder caused by a deficiency of the lysosomal hydrolase alpha-galactosidase A (alpha-gal). The deficiency of this enzyme leads to the systemic deposition of ceramide trihexoside (CTH) in various tissues and organs. Enzyme replacement using IV doses of recombinant human alpha-gal produced in CHO cells or in human fibroblasts is currently being evaluated in clinical trials as a potential therapy for this disease. However, it requires lifelong therapy involving a large amount of purified alpha-gal. As a novel approach for treatment of Fabry disease we used polymer encapsulated Chinese hamster ovary (CHO) cells genetically modified to express alpha-gal. The secreted high levels of alpha-gal passed through the semipermeable polymeric membrane. Using coculture system with Fabry fibroblasts, the secreted enzyme was taken up in cells, resulting in reduced accumulation of CTH in Fabry fibroblasts. This in vitro study demonstrated that an encapsulated alpha-gal-secreting cell line can be used to treat Fabry mice by transplantation in vivo. Judging from the protection against immune rejection by a semipermeable synthetic membrane, this novel approach may be applied to treat patients with Fabry disease and other lysosomal storage diseases.
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Affiliation(s)
- Y Naganawa
- Department of Inherited Metabolic Disease, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Kodiara, Tokyo, Japan
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Itoh K, Naganawa Y, Matsuzawa F, Aikawa S, Doi H, Sasagasako N, Yamada T, Kira JI, Kobayashi T, Pshezhetsky AV, Sakuraba H. Novel missense mutations in the human lysosomal sialidase gene in sialidosis patients and prediction of structural alterations of mutant enzymes. J Hum Genet 2002; 47:29-37. [PMID: 11829139 DOI: 10.1007/s10038-002-8652-7] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [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
Three novel missense mutations in the human lysosomal sialidase gene causing amino acid substitutions (P80L, W240R. and P316S) in the coding region were identified in two Japanese sialidosis patients. One patient with a severe, congenital form of type 2 sialidosis was a compound heterozygote for 239C-to-T (P80L) and 718T-to-C (W240R). The other patient with a mild juvenile-onset phenotype (type 1) was a homozygote for the base substitution of 946C-to-T (P316S). None of these mutant cDNA products showed enzymatic activity toward an artificial substrate when coexpressed in galactosialidosis fibroblastic cells together with protective protein/cathepsin A (PPCA). All mutants showed a reticular immunofluorescence distribution when coexpressed with the PPCA gene in COS-1 cells, suggesting that the gene products were retained in the endoplasmic reticulum/Golgi area or rapidly degraded in the lysosomes. Homology modeling of the structural changes introduced by the mutations predicted that the P80L and P316S transversions cause large conformational changes including the active site residues responsible for binding the sialic acid carboxylate group. The W240R substitution was deduced to influence the molecular surface structure of a limited region of the constructed models, which was also influenced by previously identified V217M and G243R transversions.
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Affiliation(s)
- Kohji Itoh
- Department of Clinical Genetics, The Tokyo Metropolitan Institute of Medical Science, Tokyo Metropolitan Organization for Medical Research, Japan.
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Seishima M, Oyama Z, Shimizu H, Naganawa Y, Yoshimura T, Yamazaki F. Pemphigus of the eyelids. Eur J Dermatol 2001; 11:141-3. [PMID: 11275814] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
We report the case of a 56-year-old woman who presented with a 2-month history of widespread oral erosion and a 3-day history of small papules on the lower eyelids. No other skin involvement was found. Histopathological examination revealed suprabasal cleft and acantholysis in the lower epidermis of the papule on the lower eyelid and in the lower mucous membrane of the oral mucosa. Intercellular deposits of IgG and C3 were seen in the whole epidermis of the specimen from the papule on the right lower eyelid by direct immunofluorescence study. These deposits were also observed in the biopsy specimen from erosion on the left buccal membrane. Indirect immunofluorescence study using normal human skin as a substrate showed intercellular antibodies directed to the cell surface of the whole epidermis with a titer of 1:40. The titers of antibodies to desmoglein 3 and 1 were 118 and 25.9, respectively, by enzyme-linked immunosorbent assay. The patient was treated with an oral administration of prednisolone (0.75 mg/kg/day) for 9 days, which improved the skin eruptions and oral erosion. The dose of prednisolone was gradually tapered and it took 10 weeks to cease this treatment. These findings suggest that this patient is an unusual case of pemphigus vulgaris (mucosal dominant type) diagnosed from the clinical and histopathological findings, with positive antibodies to desmoglein 3 and 1.
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Affiliation(s)
- M Seishima
- Department of Dermatology, Ogaki Municipal Hospital, Minaminokawa-cho 4-86, Ogaki, 503-8502, Japan.
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Naganawa Y, Itoh K, Shimmoto M, Takiguchi K, Doi H, Nishizawa Y, Kobayashi T, Kamei S, Lukong KE, Pshezhetsky AV, Sakuraba H. Molecular and structural studies of Japanese patients with sialidosis type 1. J Hum Genet 2000; 45:241-9. [PMID: 10944856 DOI: 10.1007/s100380070034] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.1] [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: 10/27/2022]
Abstract
To gain insight into the pathogenesis of sialidosis type 1, we performed molecular investigations of two unrelated Japanese patients. Both of them are compound heterozygotes for base substitutions of 649G-to-A and 727G-to-A, which result in amino acid alterations V217M and G243R, respectively. Using homology modeling, the structure of human lysosomal neuraminidase was constructed and the structural changes caused by these missense mutations were deduced. The predicted change due to V217M was smaller than that caused by G243R, the latter resulting in a drastic, widespread alteration. The overexpressed gene products containing these mutations had the same molecular weight as that of the wild type, although the amounts of the products were moderately decreased. A biochemical study demonstrated that the expressed neuraminidase containing a V217M mutation was partly transported to lysosomes and showed residual enzyme activity, although a G243R mutant was retained in the endoplasmic reticulum/Golgi area and had completely lost the enzyme activity. Considering the data, we surmise that the V217M substitution may be closely associated with the phenotype of sialidosis type 1 with a late onset and moderate clinical course.
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Affiliation(s)
- Y Naganawa
- Department of Clinical Genetics, Tokyo Metropolitan Institute of Medical Science, Tokyo Metropolitan Organization for Medical Research, Japan
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Naganawa Y, Itoh K, Shimmoto M, Kamei S, Takiguchi K, Doi H, Sakuraba H. Stable expression of protective protein/cathepsin A-green fluorescent protein fusion genes in a fibroblastic cell line from a galactosialidosis patient. Model system for revealing the intracellular transport of normal and mutated lysosomal enzymes. Biochem J 1999; 340 ( Pt 2):467-74. [PMID: 10333491 PMCID: PMC1220273 DOI: 10.1042/bj3400467] [Citation(s) in RCA: 5] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Fibroblastic cell lines derived from a galactosialidosis patient, stably expressing the chimaeric green fluorescent protein variant (EGFP) gene fused to the wild-type and mutant human lysosomal protective protein/cathepsin A (PPCA) cDNA, were first established as a model system for revealing the sorting and processing of lysosomal enzymes and for investigating the molecular bases of their deficiencies. In the cell line expressing the wild-type PPCA-EGFP chimaera gene (EGFP-PPwild), an 81 kDa form (27 kDa EGFP fused to the C-terminus of the 54 kDa PPCA precursor) was produced, then processed into the mature 32/20 kDa two-chain form free of the EGFP domain. The intracellular cathepsin A, alpha-N-acetylneuraminidase and beta-galactosidase activities, which are deficient in the parent fibroblastic cells, could also be significantly restored in the cells. In contrast with the uniform and strong fluorescence throughout the cytoplasm and nucleus in the mock-cell line expressing only EGFP cDNA, weak reticular and punctate fluorescence was distributed throughout the EGFP-PPwild cell line. Bafilomycin A1, a potent inhibitor of vacuolar ATPase and intracellular acidification, induced the distribution of Golgi-like perinuclear fluorescence throughout the living and fixed cells, in which only the 81 kDa product was detected. After removal of the agent, time-dependent transport of the chimaeric protein from the Golgi apparatus to the prelysosomal structure in living cells was monitored with a confocal laser scanning microscope system. Leupeptin caused the distribution of lysosome-like granular fluorescence throughout the cytoplasm in the fixed cells, although it was hardly observed in living cells. The latter agent also dose-dependently induced an increase in the intracellular amount of the 81 kDa product containing the EGFP domain and inhibited the restoration of cathepsin A activity in the EGFP-PPwild cells after the removal of bafilomycin A1. In parallel, both the mature two-chain form and PPCA function disappeared. These results suggested that the chimaera gene product was transported to acidic compartments (endosomes/lysosomes), where proteolytic processing of the PPCA precursor/zymogen, quenching of the fluorescence, and random degradation of the EGFP portion occurred. A cell line stably expressing a chimaeric gene with a mutant PPCA cDNA containing an A1184-->G (Y395C) mutation, commonly detected in Japanese severe early-infantile type of galactosialidosis patients, showed an endoplasmic reticulum (ER)-like reticular fluorescence pattern. The PPCA-immunoreactive gene product was hardly detected in this cell line. The mutant chimaeric product was suggested to be degraded rapidly in the ER before transport to post-ER compartments. A cell line expressing the chimaeric gene with a T746-->A (Y249N) PPCA mutation exhibited both ER-like reticular and granular fluorescence on the reticular structure that was stronger than that in the EGFP-PPwild cells. Some of them contained large fluorescent inclusion-body-like structures. The ineffectiveness of transport inhibitors in the distribution changes in the two mutant chimaeric proteins suggested that they were not delivered to acidic compartments. Therefore this expression system can possibly be applied to the direct analysis of the sorting defects of mutant gene products in living cells and will be useful for the molecular investigation of lysosomal diseases, including galactosialidosis.
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Affiliation(s)
- Y Naganawa
- Department of Clinical Genetics, The Tokyo Metropolitan Institute of Medical Science, Honkomagome 3-18-22, Bunkyo-ku, Tokyo 113-8613, Japan
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Itoh K, Naganawa Y, Kamei S, Shimmoto M, Sakuraba H. Stabilizing effect of lysosomal beta-galactosidase on the catalytic activity of protective protein/cathepsin A secreted by human platelets. Biochem Biophys Res Commun 1998; 253:228-34. [PMID: 9878520 DOI: 10.1006/bbrc.1998.9696] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The 32/20-kDa two-chain form of protective protein/cathepsin A (CathA) secreted by human platelets was thermostable in the aggregation supernatant at acidic pH, but was denatured at neutral pH. Leupeptin partly protected the CathA against denaturation, which was not observed in the supernatant after depletion of the cosecreted lysosomal acid beta-galactosidase (beta-Gal) by affinity separation with p-aminophenylthiogalactose (PATG)-agarose beads even at pH 4.8. The purified recombinant human beta-Gal proteins, the 84-kDa precursor and 64-kDa mature-like enzyme (the tryptic product of the 84-kDa precursor), also protected the CathA against denaturation at neutral pH in part. Biospecific interaction analysis revealed that the CathA secreted by platelets dose dependently bound to the immobilized recombinant beta-Gal proteins. The association rate constant of CathA with the 64-kDa mature-like beta-Gal was 4.0 x 10(6) (M-1 s-1) at acidic pH, which was three times larger than that with the 84-kDa beta-Gal precursor. The calculated affinity constants for the enzyme molecules at acidic pH were approximately 1 x 10(9) (M-1), and those at neutral pH were two orders lower. These results first demonstrated that beta-Gal stabilizes the catalytic activity of CathA through direct binding in vitro. The affinity was shown to increase with removal of the carboxy-terminal domain of the beta-Gal precursor.
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Affiliation(s)
- K Itoh
- Department of Clinical Genetics, The Tokyo Metropolitan Institute of Medical Science, Japan.
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Kato T, Ochiai Y, Naganawa Y, Maki I, Ozawa Y, Ohnishi M, Hata T. [Anesthetic management for partial tongue resection in a patient with Beckwith-Wiedemann syndrome]. Masui 1992; 41:861-3. [PMID: 1608168] [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] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A 14-month-old baby weighing 4300 g was a giant infant with macroglossia. Exomphalos was not present, but diastasis recti abdominis was observed. The patient was therefore diagnosed as having Beckwith-Wiedemann syndrome (EMG syndrome). Other characteristic signs such as neonatal hypoglycemia, hemihypertrophy, and a small ventricular septal defect were also recognized, but nephromegaly or hepatomegaly was not present. Tongue reduction by wedge resection was performed under general anesthesia. Some of the problems associated with anesthetic management in this syndrome are hypoglycemia, airway obstruction and cardiovascular status. After induction with increasing concentration of halothane (0.5-4.0%) and 66% nitrous oxide in oxygen, a nasotracheal tube was inserted. Endotracheal intubation was easy without using a neuromuscular blocking agent. Anesthetic maintenance was accomplished with nitrous oxide 66% in oxygen and halothane 0.5-1.0% and no neuromuscular blocking agent was used. The plasma glucose level was kept within normal ranges during and after the operation by infusion of acetate Ringer's solution with 5% glucose. The postoperative progress was uneventful.
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Affiliation(s)
- T Kato
- Department of Anesthesiology, Toyokawa City Hospital
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Onishi M, Naganawa Y, Aoki K, Ito H, Oda H. [Analgesic effects of McN-2783 to post-extraction pain--preliminary test for the determination of proper dosage]. Shikai Tenbo 1982; 59:199-206. [PMID: 6950534] [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: 01/22/2023]
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Hinoshita M, Ohnishi M, Hashimoto O, Naganawa Y, Narita T, Kitaoka Y, Aso M, Kawai T. [The application of xeroradiography in oral surgery (author's transl)]. Aichi Gakuin Daigaku Shigakkai Shi 1981; 19:91-7. [PMID: 6948528] [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: 01/22/2023]
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Naganawa Y, Ohtsuji K, Nabetani H, Hotta F, Tatematsu M, Oka M, Kameyama Y. [An ameloblastoma in anterior mandible of child (author's transl)]. Aichi Gakuin Daigaku Shigakkai Shi 1979; 17:94-9. [PMID: 297440] [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: 12/14/2022]
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Hotta F, Oka M, Naganawa Y, Ohtsuji K. [Dental treatment of handicapped children under general anesthesia (author's transl)]. Aichi Gakuin Daigaku Shigakkai Shi 1979; 17:33-7. [PMID: 162032] [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: 12/13/2022]
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Kitayama S, Umemura N, Naganawa Y, Ise N, Kurita K, Oriya S, Sugimura T, Ootsuji K, Miyata T. [Surgical correction with Köle method of mandibular prognathism (author's transl)]. Aichi Gakuin Daigaku Shigakkai Shi 1979; 17:38-44. [PMID: 297437] [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: 12/14/2022]
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Ohtsuji K, Naganawa Y, Tomi T, Hotta F, Oka M. [Clinical observation on the jaw fracture in patients in Ohgaki City Hospital from 1972 to 1977 (author's transl)]. Aichi Gakuin Daigaku Shigakkai Shi 1979; 17:27-32. [PMID: 297436] [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: 12/14/2022]
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