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Tezuka T, Higuchi R, Hagiya K, Saji M, Takamisawa I, Shimizu J, Iguchi N, Takanashi S, Doi S, Okazaki S, Sato K, Tamura H, Takayama M. The effect of underweight on mid-term outcome following transcatheter aortic valve implantation: an insight from multicenter registry. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.1942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Obesity has the adverse prognostic impact in the general population, whereas paradoxical effect of obesity has been reported in patients with heart failure. Several studies have suggested the same obesity paradox in patients undergoing transcatheter aortic valve implantation (TAVI), however, they included limited number of underweight patients.
Purpose
The aim of this study was to clarify the effect of underweight on outcome following TAVI.
Methods
We retrospectively analyzed consecutive 1,027 patients undergoing TAVI between April 2010 and June 2019. The patients were categorized according to body mass index (BMI) as follows: underweight (<18.5 kg/m2, n=150), normal weight (18.5 to 25 kg/m2, n=657), and overweight (>25 kg/m2, n=220). BMI was defined as body weight (kg) divided by the square of body height (m) measured at the hospital admission. We compared the short- and mid-term outcome after TAVI among three groups, and all clinical events were accordance with Valve Academic Research Consortium-2 criteria.
Results
Underweight patients were more often female, and had a higher prevalence of hypertension, dyslipidemia, peripheral artery disease, anemia, and hypoalbuminemia. They also presented lower ejection fraction, smaller aortic valve area, and higher surgical risk score. In procedural findings, device unsuccess and major vascular complication more occurred in underweight patients, but 30-day mortality was equivalent among three groups. The mid-term survival of the underweight was inferior to the other two groups (figure).In the multivariate analysis, female (hazard ratio [HR] 0.52, 95% confidence interval [CI] 0.37–0.73, P=0.0002), atrial fibrillation (HR 2.22, 95% CI 1.56–3.17, P<0.0001), albumin value (HR 0.37 per 1-g/dl increase, 95% CI 0.25–0.55, P<0.0001), Society of Thoracic Surgeons score (HR 1.06 per 1% increase, 95% CI 1.02–1.06, P=0.0039), 30-day combined endpoint (HR 2.12, 95% CI 1.33–3.38, P=0.0017), and underweight (HR 1.59, 95% CI 1.04–2.37, P=0.026) were associated with the survival after TAVI.
Conclusion
The underweight had a worse mid-term prognosis, representing the obesity paradox in the TAVI population.
Kaplan-Meier curves
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- T Tezuka
- Sakakibara heart institute, Fucyu Tokyo, Japan
| | - R Higuchi
- Sakakibara heart institute, Fucyu Tokyo, Japan
| | - K Hagiya
- Sakakibara heart institute, Fucyu Tokyo, Japan
| | - M Saji
- Sakakibara heart institute, Fucyu Tokyo, Japan
| | | | - J Shimizu
- Sakakibara heart institute, Fucyu Tokyo, Japan
| | - N Iguchi
- Sakakibara heart institute, Fucyu Tokyo, Japan
| | - S Takanashi
- Kawasaki Saiwai Hospital, Cardiovascular Surgery, Kawasaki City, Japan
| | - S Doi
- Juntendo university graduate school of medicine, Cardiovascular Medicine, bunkyo-ku, Japan
| | - S Okazaki
- Juntendo university graduate school of medicine, Cardiovascular Medicine, bunkyo-ku, Japan
| | - K Sato
- Mie university hospital, Cardiology, Tsu, Japan
| | - H Tamura
- Yamagata University, Cardiology, Pulmonology and Nephrology, Yamagata, Japan
| | - M Takayama
- Sakakibara heart institute, Fucyu Tokyo, Japan
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Kumagai K, Harigane K, Kusayama Y, Tezuka T, Choe H, Inaba Y, Saito T. Effects of once-monthly minodronate versus risedronate in osteoporosis patients with rheumatoid arthritis: a 12-month randomized head-to-head comparison. Osteoporos Int 2018; 29:1637-1642. [PMID: 29574518 DOI: 10.1007/s00198-018-4494-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Accepted: 03/19/2018] [Indexed: 01/01/2023]
Abstract
UNLABELLED A head-to-head comparison of once-monthly oral bisphosphonates minodronate (MIN) and risedronate (RIS) in patients with rheumatoid arthritis (RA) demonstrated that MIN has the same effect as RIS on increase in bone mineral density (BMD) and a stronger effect on inhibition of bone resorption than RIS, suggesting that MIN is a promising treatment option for osteoporosis patients with RA. INTRODUCTION To evaluate the effect of once-monthly oral MIN in patients with RA, a prospective, randomized, open-label, head-to-head comparison with once-monthly oral RIS was conducted. METHODS A total of 83 patients with RA were randomly assigned to either once-monthly oral MIN 50 mg (n = 42) or once-monthly oral RIS 75 mg (n = 41). Serial BMD and bone turnover markers were measured and compared between the treatment groups. RESULTS BMD (lumbar spine, total hip, femoral neck) increased significantly after 12 months of treatment with MIN (3.8, 2.0, and 2.2%, respectively, P < 0.05) and RIS (3.6, 1.9, and 1.9%, respectively, P < 0.05). There were no significant differences between the treatment groups. Percent changes of bone turnover markers from baseline to 12 months in the MIN group were significantly greater than those in the RIS group (TRACP-5b: - 36.3 vs - 19.3%, P < 0.05; NTX: - 27.1 vs - 17.3%, P < 0.05; BAP: -30.2 vs -19.4%, P < 0.05). CONCLUSIONS The present study of RA patients demonstrated that MIN has the same effect as RIS on increase in BMD and a stronger effect on inhibition of bone resorption than RIS. The results suggest that MIN is a promising treatment option for osteoporosis patients with RA.
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Affiliation(s)
- K Kumagai
- Department of Orthopaedic Surgery, Graduate School of Medicine, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama, 236-0004, Japan.
| | - K Harigane
- Department of Orthopaedic Surgery, Graduate School of Medicine, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama, 236-0004, Japan
| | - Y Kusayama
- Department of Orthopaedic Surgery, Graduate School of Medicine, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama, 236-0004, Japan
| | - T Tezuka
- Department of Orthopaedic Surgery, Graduate School of Medicine, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama, 236-0004, Japan
| | - H Choe
- Department of Orthopaedic Surgery, Graduate School of Medicine, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama, 236-0004, Japan
| | - Y Inaba
- Department of Orthopaedic Surgery, Graduate School of Medicine, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama, 236-0004, Japan
| | - T Saito
- Department of Orthopaedic Surgery, Graduate School of Medicine, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama, 236-0004, Japan
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Oba M, Inaba Y, Kobayashi N, Ike H, Tezuka T, Saito T. Effect of femoral canal shape on mechanical stress distribution and adaptive bone remodelling around a cementless tapered-wedge stem. Bone Joint Res 2016; 5:362-9. [PMID: 27601435 PMCID: PMC5017138 DOI: 10.1302/2046-3758.59.2000525] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Accepted: 06/23/2016] [Indexed: 02/04/2023] Open
Abstract
OBJECTIVES In total hip arthroplasty (THA), the cementless, tapered-wedge stem design contributes to achieving initial stability and providing optimal load transfer in the proximal femur. However, loading conditions on the femur following THA are also influenced by femoral structure. Therefore, we determined the effects of tapered-wedge stems on the load distribution of the femur using subject-specific finite element models of femurs with various canal shapes. PATIENTS AND METHODS We studied 20 femurs, including seven champagne flute-type femurs, five stovepipe-type femurs, and eight intermediate-type femurs, in patients who had undergone cementless THA using the Accolade TMZF stem at our institution. Subject-specific finite element (FE) models of pre- and post-operative femurs with stems were constructed and used to perform FE analyses (FEAs) to simulate single-leg stance. FEA predictions were compared with changes in bone mineral density (BMD) measured for each patient during the first post-operative year. RESULTS Stovepipe models implanted with large-size stems had significantly lower equivalent stress on the proximal-medial area of the femur compared with champagne-flute and intermediate models, with a significant loss of BMD in the corresponding area at one year post-operatively. CONCLUSIONS The stovepipe femurs required a large-size stem to obtain an optimal fit of the stem. The FEA result and post-operative BMD change of the femur suggest that the combination of a large-size Accolade TMZF stem and stovepipe femur may be associated with proximal stress shielding.Cite this article: M. Oba, Y. Inaba, N. Kobayashi, H. Ike, T. Tezuka, T. Saito. Effect of femoral canal shape on mechanical stress distribution and adaptive bone remodelling around a cementless tapered-wedge stem. Bone Joint Res 2016;5:362-369. DOI: 10.1302/2046-3758.59.2000525.
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Affiliation(s)
- M Oba
- Department of Orthopaedic Surgery, Yokohama City University, s3-9, Fukuura, Kanazawa-ku, Yokohama-city, Kanagawa, 236-0004, Japan
| | - Y Inaba
- Department of Orthopaedic Surgery, Yokohama City University, s3-9, Fukuura, Kanazawa-ku, Yokohama-city, Kanagawa, 236-0004, Japan
| | - N Kobayashi
- Department of Orthopaedic Surgery, Yokohama City University, s3-9, Fukuura, Kanazawa-ku, Yokohama-city, Kanagawa, 236-0004, Japan
| | - H Ike
- Department of Orthopaedic Surgery, Yokohama City University, s3-9, Fukuura, Kanazawa-ku, Yokohama-city, Kanagawa, 236-0004, Japan
| | - T Tezuka
- Department of Orthopaedic Surgery, Yokohama City University, s3-9, Fukuura, Kanazawa-ku, Yokohama-city, Kanagawa, 236-0004, Japan
| | - T Saito
- Department of Orthopaedic Surgery, Yokohama City University, s3-9, Fukuura, Kanazawa-ku, Yokohama-city, Kanagawa, 236-0004, Japan
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Tezuka T, Hirai R. The synthesis of the cystine-rich proteins in rat epidermis: I. Analysis by [35S]cystine incorporation. Curr Probl Dermatol 2015; 10:255-67. [PMID: 7238093 DOI: 10.1159/000396294] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Three-day-old Sprague-Dawley rats were injected intraperitoneally with 100 muCi of [35S]cystine. They were then sacrificed at 30 minutes, 2, 4, and 10 hours. The skins were epilated by the beeswax-resin procedure and the epidermis was separated by soaking in NH4Cl solution. Neither hair with hair follicles nor hair sheath was attached to the epidermal sheets after the epilation. Keratohyalin granules were solubilized after the freezing and thawing procedure. Living cell layers were separated from stratum corneum following further incubation in NH4Cl solution. Both the living cell layers and the stratum corneum were extracted with 8 M alkaline urea. Seventy-two to 92% of the total radioactivity incorporated into epidermal proteins was found in the urea-insoluble fraction of the stratum corneum. Only 2.4 to 6.4% of the total radioactivity was incorporated into the keratohyalin granular fraction. The specific radioactivity which was incorporated into the urea-insoluble fraction of the stratum corneum was still increasing 10 hours after injection, though the radioactivity in other fractions was decreasing at 10 hours following injection. The highest specific radioactivity of [35S]cystine was found in the urea-soluble fraction of the living cell layers, and was being rapidly turned over.
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Ogawa H, Azuma M, Muto S, Nishioka Y, Honjo A, Tezuka T, Uehara H, Izumi K, Itai A, Sone S. IκB kinase β inhibitor IMD-0354 suppresses airway remodelling in a Dermatophagoides pteronyssinus-sensitized mouse model of chronic asthma. Clin Exp Allergy 2011; 41:104-15. [PMID: 20573155 DOI: 10.1111/j.1365-2222.2010.03564.x] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND Nuclear factor (NF)-κB is a transcription factor that regulates cytokine and chemokine production in various inflammatory diseases, including bronchial asthma. IκB kinase (IKK) β is important for NF-κB activation in inflammatory conditions, and is possibly related to airway remodelling. Thus, inhibition of the IKKβ-NF-κB pathway may be an ideal strategy for the management of airway remodelling. OBJECTIVE We examined the effects of a newly synthesized IKKβ inhibitor, IMD-0354, in a chronic allergen exposure model of bronchial asthma in mice. METHODS A chronic mouse model was generated by challenge with house dust mite antigen (Dermatophagoides pteronyssinus). IMD-0354 was administrated intraperitoneally in therapeutic groups. Lung histopathology, hyperresponsiveness and the concentrations of mediators and molecules in supernatants of lung homogenates were determined. RESULTS NF-κB activation was inhibited by prolonged periods of IMD-0354 administration. IMD-0354 reduced the numbers of bronchial eosinophils. IMD-0354 also inhibited the pathological features of airway remodelling, including goblet cell hyperplasia, subepithelial fibrosis, collagen deposition and smooth muscle hypertrophy. Inhibition of these structural changes by IMD-0354 was the result of the suppressing the production and activation of remodelling-related mediators, such as TGF-β, via inhibition of IKKβ. IMD-0354 inhibited IL-13 and IL-1β production, and it restored the production of IFN-γ. It also ameliorated airway hyperresponsiveness. CONCLUSION IKKβ plays crucial roles in airway inflammation and remodelling in a chronic mouse model of asthma. A specific IKKβ inhibitor, IMD-0354, may be therapeutically beneficial for treating airway inflammation and remodelling in chronic asthma.
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Affiliation(s)
- H Ogawa
- Department of Respiratory Medicine & Rheumatology Department of Molecular and Environmental Pathology, Institute of Health Biosciences, University of Tokushima Graduate School, Tokushima, Japan.
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Suzuki M, Koda K, Yamazaki M, Tezuka T, Kosugi C, Imai K, Hirano A, Nakagawa R, Adachi K, Shirakami R, Yasuda H. Abstract P4-10-11: Nobel Approach for Breast Conserving Surgery after Primary Systemic Therapy: Real-Time Virtual Navigation. Cancer Res 2010. [DOI: 10.1158/0008-5472.sabcs10-p4-10-11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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
Abstract
Background:
Breast-conserving surgery after primary systemic therapy (PST) has become a widely acceptable procedure for locally advanced breast cancers. Sometimes it is difficult to determine the appropriate resection-line at the time of surgical operation because of tumor size reduction or indistinct boundary of the tumor. Moreover we cannot detect tumors in cases with complete response. That was why we developed a new navigation technique using real-time image reconstruction.
Materials and methods: Multi-detector row computed tomography (MD-CT) has been performed for all breast cancer patients in our institute. DICOM images of MD-CT were analyzed by image processing software ‘OsiriX'. OsiriX is an open source software which anyone can download from website (http://www. osirix-viewer.com). OsiriX has been specifically designed for navigation and visualization of multimodality and multidimensional images. We used 3D volume rendering images. At the time of surgery, pre-PST volume rendering images ware superimposed directly on the patients’ skin from projector which was connected to a personal computer in the operating room.
Results: We could see ‘real-time’ rendering images (from skin to organ by layer to layer) on the patient's body. By using pre-PST imaging data, we could recognize precise tumor area and could perform breast conserving surgery safer and easier than before.
Conclusion: Using 3D reconstruction MD-CT images which were obtained before PST, ‘real-time’ virtual navigation was helpful to determine the resection-line for clear surgical margin in breast-conserving surgery after PST. This new technique does not need some expensive equipments and easily performed by surgeon. Ordinary personal computer and projector make it possible to demonstrate a new environment in surgical operation.
Citation Information: Cancer Res 2010;70(24 Suppl):Abstract nr P4-10-11.
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Affiliation(s)
- M Suzuki
- Teikyo University Chiba Medical Center, Ichihara City, Chiba, Japan
| | - K Koda
- Teikyo University Chiba Medical Center, Ichihara City, Chiba, Japan
| | - M Yamazaki
- Teikyo University Chiba Medical Center, Ichihara City, Chiba, Japan
| | - T Tezuka
- Teikyo University Chiba Medical Center, Ichihara City, Chiba, Japan
| | - C Kosugi
- Teikyo University Chiba Medical Center, Ichihara City, Chiba, Japan
| | - K Imai
- Teikyo University Chiba Medical Center, Ichihara City, Chiba, Japan
| | - A Hirano
- Teikyo University Chiba Medical Center, Ichihara City, Chiba, Japan
| | - R Nakagawa
- Teikyo University Chiba Medical Center, Ichihara City, Chiba, Japan
| | - K Adachi
- Teikyo University Chiba Medical Center, Ichihara City, Chiba, Japan
| | - R Shirakami
- Teikyo University Chiba Medical Center, Ichihara City, Chiba, Japan
| | - H. Yasuda
- Teikyo University Chiba Medical Center, Ichihara City, Chiba, Japan
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Saito T, Tezuka T, Konno R, Fujii N. Protective effects of metallothionein I and II against metal- and ultraviolet radiation-induced damage in cultured lens epithelial cells. Jpn J Ophthalmol 2010; 54:486-93. [DOI: 10.1007/s10384-010-0844-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2009] [Accepted: 03/30/2010] [Indexed: 10/18/2022]
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Machino Y, Ohta H, Suzuki E, Higurashi S, Tezuka T, Nagashima H, Kohroki J, Masuho Y. Effect of immunoglobulin G (IgG) interchain disulfide bond cleavage on efficacy of intravenous immunoglobulin for immune thrombocytopenic purpura (ITP). Clin Exp Immunol 2010; 162:415-24. [PMID: 21029072 DOI: 10.1111/j.1365-2249.2010.04255.x] [Citation(s) in RCA: 15] [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: 02/02/2023] Open
Abstract
Intravenous immunoglobulin (IVIG) has been used widely to treat immune thrombocytopenic purpura (ITP), but the mechanisms of its action remain unclear. We investigated the affinity for Fcγ receptors (FcγRs) and the thrombocytopenia-ameliorating effect of S-sulfonated gammaglobulin (SGG) and S-alkylated gammaglobulin (AGG), in comparison with unmodified gammaglobulin (GG), in a mouse ITP model. Cleavage of immunoglobulin (Ig)G interchain disulfide bonds by either S-sulfonation or S-alkylation did not decrease the affinity for FcγRIIA (CD32A) and FcγRIIB (CD32B), but did decrease the affinity for FcγRIA (CD64A) and FcγRIIIA (CD16A), presumably because of changes in H-chain configuration. The interchain disulfide bond cleavage decreased the affinity much more for mouse FcγRIV than for mouse FcγRIIB. The ability of AGG to ameliorate ITP was greatly diminished, while SGG, whose disulfide bonds are reconstituted in vivo, was as effective as GG. These results suggest that the interchain disulfide bonds are important for therapeutic effect. It is also suggested that the interaction of IVIG with the inhibitory receptor FcγRIIB is insufficient for effective amelioration of ITP and that, at least in this model, direct binding of IVIG to FcγRIIIA is also required.
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Affiliation(s)
- Y Machino
- Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda, Chiba, Japan
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Kageyama H, Ueda H, Tezuka T, Ogasawara A, Narita Y, Kageyama T, Ichinose M. Differences in the P1' substrate specificities of pepsin A and chymosin. J Biochem 2009; 147:167-74. [DOI: 10.1093/jb/mvp158] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Rodríguez S, Bátiz LF, Ortloff AR, Vío K, Muñoz RI, DeGraff LM, Graves JP, Stumpo DJ, Blackshear PJ, Zeldin DC, Goto J, Tezuka T, Yamamoto T, Rodríguez EM. Lack of formation of Reissner fiber leads to hydrocephalus. Cerebrospinal Fluid Res 2007. [DOI: 10.1186/1743-8454-4-s1-s25] [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: 11/10/2022] Open
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Higashino A, Fukuhara R, Tezuka T, Kageyama T. Molecular cloning and gene expression of endoplasmic reticulum stress proteins in Japanese monkey, Macaca fuscata. J Med Primatol 2007; 35:376-83. [PMID: 17214666 DOI: 10.1111/j.1600-0684.2006.00186.x] [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: 11/28/2022]
Abstract
BACKGROUND Immunoglobulin heavy-chain binding protein (BiP), calreticulin (Crt), and protein disulfide isomerase (PDI), are major resident endoplasmic reticulum (ER) stress proteins which are involved in diverse roles relating to successful folding, assembly, intracellular localization, and degradation of other proteins. METHODS In this study, we molecular cloned cDNAs for BiP, Crt, and PDI from Japanese monkey (Macaca fuscata), and analyzed tissue-specific expression of respective genes. RESULTS AND CONCLUSIONS The lengths of protein-coding regions of these cDNAs for BiP, Crt and PDI are 1965, 1254, and 1533 bp, respectively. Each protein has a signal peptide and a KDEL motif in N- and C-terminal parts respectively, showing its intracellular localization to be the lumen of the ER. These stress proteins are highly conserved, showing that their similarities among mammals are more than 90% in the level of amino acid. The expression of the genes for stress proteins differed among the monkey tissues examined. BiP and PDI gene expression was predominant in secretory tissues such as liver and kidney, and brain tissues. But Crt gene expressed rather ubiquitously in a variety of tissues.
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Affiliation(s)
- A Higashino
- Center for Human Evolution Modeling Research, Primate Research Institute, Kyoto University, Inuyama, Japan.
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Goi K, Sugita K, Tezuka T, Sato H, Uno K, Inukai T, Hamada Y, Nakazawa S. A successful case of allogeneic bone marrow transplantation for osteosarcoma with multiple metastases of lung and bone. Bone Marrow Transplant 2006; 37:115-6. [PMID: 16258530 DOI: 10.1038/sj.bmt.1705209] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Tezuka T, Marubashi W. Hybrid lethality in interspecific hybrids between Nicotiana tabacum and N. suaveolens: evidence that the Q chromosome causes hybrid lethality based on Q-chromosome-specific DNA markers. Theor Appl Genet 2006; 112:1172-8. [PMID: 16456655 DOI: 10.1007/s00122-006-0219-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2005] [Accepted: 01/06/2006] [Indexed: 05/06/2023]
Abstract
Hybrid seedlings from the cross Nicotiana tabacum x N. suaveolens express lethality at 28 degrees C. We carried out a cross between monosomic lines of N. tabacum lacking the Q chromosome and N. suaveolens by test-tube pollination and ovule culture at 28 degrees C. To suppress hybrid lethality, hybrid seedlings obtained were transferred to 36 degrees C immediately after germination and cultured. We determined whether Q-chromosome-specific DNA markers were detected among hybrid seedlings. When hybrid seedlings cultured at 36 degrees C were transferred to 28 degrees C, hybrid seedlings in which Q-chromosome-specific DNA markers were detected expressed hybrid lethality, while hybrid seedlings in which Q-chromosome-specific DNA markers were not detected did not express hybrid lethality. From these results, we concluded that the presence of the Q chromosome of N. tabacum is related to hybrid lethality observed in crosses between N. tabacum and N. suaveolens. This is the first report that clearly demonstrates the relationship between a certain chromosome and hybrid lethality in the genus Nicotiana using chromosome-specific DNA markers. Additionally, we confirmed that the Q chromosome belongs to the S subgenome because Q-chromosome-specific DNA markers were detected only in N. sylvestris.
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Affiliation(s)
- T Tezuka
- School of Agriculture, Ibaraki University, 300-0393 Ami, Ibaraki, Japan
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Takahashi M, Horiuchi Y, Tezuka T. Large haematoxylin-stainable keratohyaline granules in solar keratoses: immunohistochemical comparison using anti-Ted-H-1 antibody and antiloricrin antibody. Br J Dermatol 2005; 153:976-80. [PMID: 16225609 DOI: 10.1111/j.1365-2133.2005.06866.x] [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: 11/28/2022]
Abstract
BACKGROUND Our previous study showed that large keratohyaline granules (KHG) in molluscum contagiosum that stained with haematoxylin also reacted with anti-Ted-H-1 monoclonal antibody (mAb), but not with antifilaggrin mAb or antiloricrin polyclonal antibody (pAb). This finding indicated that the Ted-H-1 antigenic protein is a haematoxylin-stainable protein in KHG. OBJECTIVES To clarify the identity of the major component protein of the large KHG in solar keratosis, another disorder in which large KHG are observed. METHODS An enzyme immunohistochemical study was performed using antifilaggrin mAb, anti-Ted-H-1 mAb and antiloricrin pAb. Immunofluorescent double staining and immunoelectron microscopic analyses were performed using anti-Ted-H-1 mAb and antiloricrin pAb. RESULTS Antifilaggrin mAb, anti-Ted-H-1 mAb and antiloricrin pAb reacted with normal KHG in nonlesional skin of solar keratosis, while only anti-Ted-H-1 mAb reacted with the large KHG in the lesions of solar keratosis. Antifilaggrin mAb did not react with large KHG. Antiloricrin pAb reacted with the cell membrane of the stratum granulosum, but not with large KHG. CONCLUSIONS These findings suggest that the haematoxylin-stainable protein in the large KHG would be a Ted-H-1 antigen protein which was neither filaggrin nor loricrin.
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Affiliation(s)
- M Takahashi
- Department of Dermatology, Kinki University School of Medicine, 377-2 Ohno-Higashi, Osaka-Sayama, Osaka 589-8511, Japan.
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Saeki H, Iizuka H, Mori Y, Akasaka T, Takagi H, Kitajima Y, Tezuka T, Tanaka T, Hide M, Yamamoto S, Hirose Y, Kodama H, Urabe K, Furue M, Kasagi F, Torii H, Nakamura K, Morita E, Tsunemi Y, Tamaki K. Prevalence of atopic dermatitis in Japanese elementary schoolchildren. Br J Dermatol 2005; 152:110-4. [PMID: 15656810 DOI: 10.1111/j.1365-2133.2004.06271.x] [Citation(s) in RCA: 55] [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: 11/27/2022]
Abstract
BACKGROUND Although there have been several reports on the prevalence of atopic dermatitis (AD) in Japanese schoolchildren based on questionnaires, there has been no nation-wide study of the frequency of this condition diagnosed by dermatologists in regular health check-ups of schoolchildren. OBJECTIVES The objective of this work was to evaluate precisely the prevalence of AD in elementary schoolchildren in Japan based on regular health check-ups by dermatologists. METHODS In 2001/2, elementary schoolchildren: first graders (age 6-7 years) and sixth graders (age 11-12 years) were examined by dermatologists in eight prefectures of Japan (Hokkaido, Iwate, Tokyo, Gifu, Osaka, Hiroshima, Kochi and Fukuoka). In each prefecture, public elementary schools were randomly selected from urban and rural districts. We planned to examine about 700 schoolchildren in each of urban first, urban sixth, rural first and rural sixth grades from the eight areas, a total of 22 400 children (700 x 4 x 8). AD was diagnosed by the dermatologists based on the Japanese Dermatological Association criteria for the disease. RESULTS The point prevalence of AD was 11.2% overall (2664 of 23 719) ranging from 7.4% (Iwate) to 15.0% (Fukuoka) in the eight areas. Seventy-four per cent, 24%, 1.6% and 0.3% of those afflicted were in the mild, moderate, severe and very severe groups, respectively. Overall, the prevalence of first graders was slightly higher than that of sixth graders (11.8% vs. 10.5%, P < 0.01). There was no apparent difference in prevalence between urban and rural districts, or between boys and girls. CONCLUSIONS The prevalence of AD in Japanese elementary schoolchildren was about 10%, three-quarters of those being mildly affected. This is the first nation-wide study made of Japanese elementary schoolchildren examined by dermatologists to evaluate the frequency of AD.
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Affiliation(s)
- H Saeki
- Department of Dermatology, Faculty of Medicine, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-8655, Japan.
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16
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Fujii N, Takeuchi N, Fujii N, Tezuka T, Kuge K, Takata T, Kamei A, Saito T. Comparison of post-translational modifications of alpha A-crystallin from normal and hereditary cataract rats. Amino Acids 2003; 26:147-52. [PMID: 15042443 DOI: 10.1007/s00726-003-0050-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2003] [Accepted: 10/06/2003] [Indexed: 10/26/2022]
Abstract
In order to investigate the relationship between lens opacities and the various modifications of lens proteins, we analyzed and compared the properties of lens proteins of 85-day old normal Wistar rats and the hereditary cataract model, ICR/f rats. The present study identified many differences between normal and mutant lens proteins. In the ICR/f mutant rats, the relative amounts of gamma-crystallin decreased and high molecular weight (HMW) protein increased. Racemization and isomerization of Asp-151 of alpha A-crystallin was observed in the mutant ICR/f rats, and Met-1 of alpha A-crystallin was oxidized to methionine sulfoxide. These modifications were not found in the age-matched normal rats. These tendencies are consistent with aged and cataractous human lenses.
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Affiliation(s)
- N Fujii
- Research Reactor Institute, Kyoto University, Kumatori, Sennan, Osaka, Japan.
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17
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Matsukura M, Yajima A, Yamazaki F, Yudate T, Yamada H, Tezuka T. Epinastine Inhibits Eosinophil Chemotaxis and Adhesion Molecules in Atopic Dermatitis. Skin Pharmacol Physiol 2003; 16:405-10. [PMID: 14528065 DOI: 10.1159/000072936] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2001] [Indexed: 11/19/2022]
Abstract
PURPOSE To investigate the effects of epinastine on eosinophil chemotaxis and changes in eosinophil adhesion molecules induced by epinastine and three other antiallergic agents, using eosinophils of atopic dermatitis (AD) patients. RESULTS Epinastine reduced eosinophil chemotaxis toward eotaxin when the eosinophils had been prestimulated with interleukin (IL)-5, but given alone it did not alter eosinophil chemotaxis toward IL-5. CD11b expression was inhibited when peripheral blood was prestimulated with IL-5, but eosinophil adhesion molecule expression was not altered. CONCLUSIONS Epinastine suppresses allergic inflammation not only through its strong antihistamine and antimediator effects, but also by inhibiting eosinophilic chemotaxis and the expression of adhesion molecules involved in chemotaxis, especially CD11b.
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Affiliation(s)
- M Matsukura
- Department of Dermatology, Kinki University School of Medicine, Osaka, Japan.
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18
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Amada N, Tezuka T, Mayeda A, Araki K, Takei N, Todokoro K, Nawa H. A novel rat orthologue and homologue for the Drosophila crooked neck gene in neural stem cells and their immediate descendants. J Biochem 2003; 133:615-23. [PMID: 12801913 DOI: 10.1093/jb/mvg079] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [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: 11/13/2022] Open
Abstract
The crooked neck (crn) gene of Drosophila melanogaster encodes a scaffold protein carrying multiple tetratricopeptide repeat (TPR) motifs, and its mutation results in a reduction in the number of neuroblasts and lethality during larval stages. Here, we isolated two structurally related genes from a rat embryonic brain cDNA library. One gene is the rat orthologue of crn, which encodes 690 amino acids including 16 copies of TPR. The other gene, ATH55, encodes an 855 amino acid protein including 21 TPR motifs, which presumably represents a rat crn homologue and an orthologue of human XAB2. Both genes are highly expressed in embryonic brain but their expressions decrease during development. ATH55-like immunoreactivity is present in the ventricular zone and newly formed cortical plate, while CRN-like immunoreactivity is more abundant in a younger ventricular zone. In agreement, both proteins were found to be enriched in cultured neural stem cells and to decrease in response to cell differentiation signals. As indicated for the yeast CRN-like protein, ATH55 and CRN immunoreactivities were both recovered in the nuclear fraction and detected in the splicing complex carrying pre-mRNA. These findings suggest that both TPR-motif-containing proteins are involved in RNA processing of mammalian neural stem cells and their immediate descendants.
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Affiliation(s)
- Naoki Amada
- Molecular Neurobiology, Brain Research Institute, Niigata University, Asahimachi-dori 1-757, Niigata 951-8585, Japan
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19
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Affiliation(s)
- T Suzuki
- Department of Dermatology, Kinki University School of Medicine, Ohno-Higashi 377-2, Osaka-Sayama City, Osaka 589-8511, Japan
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20
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Maeda A, Aragane Y, Ueno K, Yamazaki F, Kawada A, Tezuka T. A case of naevus lipomatosus cutaneus superficialis of the scalp associated with pedunculated basal cell carcinoma. Br J Dermatol 2003; 148:1084-6. [PMID: 12786865 DOI: 10.1046/j.1365-2133.2003.05196.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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21
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Umezawa Y, Ozawa A, Kawasima T, Shimizu H, Terui T, Tagami H, Ikeda S, Ogawa H, Kawada A, Tezuka T, Igarashi A, Harada S. Therapeutic guidelines for the treatment of generalized pustular psoriasis (GPP) based on a proposed classification of disease severity. Arch Dermatol Res 2003; 295 Suppl 1:S43-54. [PMID: 12677432 DOI: 10.1007/s00403-002-0371-6] [Citation(s) in RCA: 95] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Generalized pustular psoriasis (GPP) is a rare but notoriously recalcitrant cutaneous diseases. Therefore, there have been few reports of more than ten patients with GPP who were treated at the same institution. The severity of this disease and its response to each therapeutic modality vary among patients. In some GPP is life-threatening, but in others it may show a benign, chronic course for a long period of time. Before starting treatment, a knowledge of the therapeutic efficacy and side effects of each drug used in the treatment of GPP is necessary. In our multicenter study, we compared the effectiveness of and adverse reactions to several systemically administered drugs. Following the development of a unique classification of the disease severity based on scoring the clinical symptoms and the laboratory findings, we propose here therapeutic guidelines for the treatment of GPP.
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Affiliation(s)
- Y Umezawa
- Department of Dermatology, Sensorium and Cutaneous Medicine, Tokai University School of Medicine, Isehara, Japan.
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22
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Aragane Y, Okamoto T, Yajima A, Isogai R, Kawada A, Tezuka T. Hydroxyurea-induced foot ulcer successfully treated with a topical basic fibroblast growth factor product. Br J Dermatol 2003; 148:599-600. [PMID: 12653764 DOI: 10.1046/j.1365-2133.2003.05209_7.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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23
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Tsutsui T, Tezuka T, Mikasa Y, Sugisawa H, Kirihara N, Hori T, Kawakami E. Artificial insemination with canine semen stored at a low temperature. J Vet Med Sci 2003; 65:307-12. [PMID: 12679558 DOI: 10.1292/jvms.65.307] [Citation(s) in RCA: 23] [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: 11/22/2022] Open
Abstract
Cooled canine semen solutions for storage were investigated with three stock solutions: egg yolk-citrate-glycine-glucose solution, egg yolk Tris-fructose citrate solution (EYT-FC), and egg yolk sodium citrate dihydrate solution (EYCD). For the control group, the second fraction of semen was examined. Nine male beagles and 37 female (47 experimental cases) beagles for artificial insemination (AI) were used. The qualities of semen stored at 4 degrees C deteriorated earlier in the control and EYCD groups. In the other two groups, sperm motility was 60% or higher after storage for 6 days and 20% or higher after storage for 12 days. On a comparison of these two groups, the sperm motility and viability were slightly higher in the EYT-FC group. A high conception rate was obtained by AI using semen stored at a low temperature for a maximum of two days in the control group and four days in the EYT-FC group.
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Affiliation(s)
- Toshihiko Tsutsui
- Department of Reproduction, Nippon Veterinary and Animal Science University, Tokyo, Japan
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24
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Affiliation(s)
- R Isogai
- Department of Dermatology, Kinki University School of Medicine, Ohno-Higashi 377-2, Osaka-Sayama, Osaka 589-8511, Japan
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25
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Ito K, Yoshida K, Sato K, Takahashi H, Kamata M, Higuchi H, Shimizu T, Itoh K, Inoue K, Tezuka T, Suzuki T, Ohkubo T, Sugawara K, Otani K. A variable number of tandem repeats in the serotonin transporter gene does not affect the antidepressant response to fluvoxamine. Psychiatry Res 2002; 111:235-9. [PMID: 12374640 DOI: 10.1016/s0165-1781(02)00141-5] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A variable number of tandem repeats (VNTR) in the second intron of the serotonin transporter gene (STin2) has been studied in association with the susceptibility to affective disorders. Recently, it was reported that selective serotonin reuptake inhibitors were more effective in patients with major depressive disorder having the homozygous allele pair (12-copy/12-copy) of VNTR in the STin2 than in ones having other allele combinations. As the study had methodological problems, further studies are needed to confirm the above finding. Therefore, the authors investigated whether the allelic variation of VNTR in the STin2 was associated with the antidepressant response to fluvoxamine in 66 patients with major depressive disorder. Fluvoxamine was prescribed up to 200 mg/day in the dosing protocol for 6 weeks. The present study showed no significant association between the polymorphism of VNTR in the STin2 and the treatment response to fluvoxamine.
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Affiliation(s)
- K Ito
- Department of Psychiatry, Akita University School of Medicine, Akita, Japan.
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26
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Tezuka T, Kikuchi O, Houk KN, Paddon-Row MN, Santiago CM, Rondan NG, Williams JC, Gandour RW. A sudden-polarization model to predict regioselectivities and periselectivities of the 1,7-sigmatropic shifts and electrocyclizations of singlet excited states of cycloheptatrienes. J Am Chem Soc 2002. [DOI: 10.1021/ja00396a012] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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28
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Tezuka T, Narita N. Hydroxylation of benzene with .alpha.-azohydroperoxide. A novel route for generation of hydroxyl radical and its reaction in anhydrous media. J Am Chem Soc 2002. [DOI: 10.1021/ja00518a053] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Tezuka T, Miyamoto R, Mukai T, Kabuto C, Kitahara Y. Novel photochemical rearrangement of aryl-6,7-dioxabicyclo[3.2.2]nona-3,8-dien-2-one into tricyclic lactone. J Am Chem Soc 2002. [DOI: 10.1021/ja00781a078] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Takahashi M, Tezuka T, Katunuma N. Phosphorylated cystatin α is a natural substrate of epidermal transglutaminase for formation of skin cornified envelope. FEBS Lett 2002; 308:79-82. [PMID: 1353732 DOI: 10.1016/0014-5793(92)81055-q] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Both keratohyalin granules (KHG) and cornified envelopes were stained histochemically in an indirect immunofluorescent study by antiphosphorylated cystatin alpha antibody, indicating that phosphorylated cystatin alpha is a component of the cornified envelope proteins. When phosphorylated cystatin alpha (P-cystatin alpha) was incubated with epidermal transglutaminase (TGase) and Ca2+ ions, polymerized protein was produced by formation of epsilon-(gamma-glutamyl)lysine cross-linking peptide bonds between lysine residues of cystatin alpha and glutamine residues of suitable protein(s) in the enzyme preparation. However, phosphorylated and non-phosphorylated cystatins were polymerized to similar extents by the TGase. Immunofluorescent and immunoelectron microscopic observations revealed that P-cystatin alpha could be detected in vivo in the KHG and cornified envelopes. Treatment of sphingosine, a specific inhibitor of protein kinase C, markedly suppressed the incorporation of cystatin alpha into KHG. Thus phosphorylation of cystatin alpha by protein kinase C may play an important role in targeting cystatin alpha into KHG.
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Affiliation(s)
- M Takahashi
- Department of Dermatology, Kinki University School of Medicine, Osaka, Japan
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32
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Itoh K, Tezuka T, Inoue K, Tada H, Suzuki T. Different binding property of verotoxin-1 and verotoxin-2 against their glycolipid receptor, globotriaosylceramide. TOHOKU J EXP MED 2001; 195:237-43. [PMID: 11908825 DOI: 10.1620/tjem.195.237] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
We determined the binding of verotoxin-1 (VT1) and verotoxin-2 (VT2) against globotriaosylceramide (Gb3) by a monoclonal antibody (mAb)-based enzyme-linked immunosorbent assay (ELISA). Ethanolic solution of Gb3 containing cholesterol and phosphatidylcholine was passively adsorbed onto the wells of microtiter plate, and Gb3-bound VT1 and VT2 were detected by anti-VT1 and anti-VT2 mAbs, respectively. Although both VT1 and VT2 reacted with Gb3 in a concentration dependent manner, terminal galactose requirement for Gb3 binding was also different from each other. Pretreatment of VT1 showed the inhibitory effect on the binding of VT2 to Gb3, while the VT2-pretreatment showed no inhibitory effect on VT1 binding to Gb3. This was not due to the replacement of Gb3-bound VT2 with post-treated VT1. These results suggest that the binding sites of VT1 and VT2 on Gb3 are not identical to each other.
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Affiliation(s)
- K Itoh
- Department of Pharmaceutical Science, Akita University Hospital, Japan
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Abstract
'Sarcoidosis-lymphoma syndrome' is known as an association of sarcoidosis with malignant lymphoma. We report a 56-year-old woman with systemic sarcoidosis who was seropositive for antibody against human T cell lymphoma/leukemia virus type I (HTLV-I). This patient showed integration of HTLV-I proviral DNA within cutaneous sarcoid nodules, but not in peripheral blood mononuclear cells. Neither atypical lymphocytes nor a T cell receptor beta1 gene rearrangement were observed in peripheral blood mononuclear cells or in cutaneous nodules, indicating that the patient did not have a smouldering type of adult T cell lymphoma/leukemia. Detection of integration of HTLV-I proviral DNA in cutaneous sarcoid nodules could suggest that the sarcoid nodules might have been generated as a protective response to chronic stimuli of HTLV-I.
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Affiliation(s)
- A Yajima
- Department of Dermatology, Kinki University School of Medicine, Osaka, Japan
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34
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Abstract
The elongation of pollen tubes in Lilium longiflorum cv. Hinomoto after self-incompatible pollination stopped halfway, but that after cross-compatible pollination (cross with cv. Georgia) did not. The elongation of pollen tubes after self-pollination was enhanced by exogenous cAMP and by pertussis toxin or cholera toxin, which activates adenylate cyclase. The level of endogenous cAMP in pistils after self-pollination was approximately one half of that after cross-pollination. Furthermore, the activity of adenylate cyclase in pistils after self-pollination was also approximately one half of that after cross-pollination. By contrast, cAMP phosphodiesterase in pistils after self-pollination was approximately 2 times as high as that after cross-pollination. A possible correlation between self-incompatibility and the low level of endogenous cAMP in lily pistils is discussed on the basis of these results.
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Affiliation(s)
- A Tsuruhara
- Division of Informatics for Natural Sciences, Graduate School of Human Informatics, Nagoya University, Chikusa-ku, Nagoya, 464-8601 Japan
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Abstract
BACKGROUND Despite the increasing incidence of basal cell carcinoma (BCC), its pathogenesis has remained largely unknown. Recently, it was reported that genes involved in tissue morphogenesis, such as sonic hedgehog or patched, were found to be mutated in BCC, suggesting the involvement of those molecules in the pathogenesis of this tumour. Furthermore, there is evidence that the Wnt-mediated signalling pathway may be one of the downstream targets of sonic hedgehog-mediated signalling, which has led us to focus on molecular events on the Wnt pathway in BCC. Among the signal transducers involved in the Wnt pathway, it is clear that beta-catenin plays a pivotal role in the promotion of morphogenesis and cell growth. In respect to this, it has been reported that, in particular circumstances, as in colorectal cancers, beta-catenin migrates to the nuclei, where it exerts an ability to activate the transcription of various genes. OBJECTIVES To investigate the cellular distribution of beta-catenin in skin tumours, in particular, in BCC. METHODS Twenty skin biopsy specimens derived from BCC, 10 from inflammatory skin diseases and five from squamous cell carcinomas were immunostained with an antibody directed against beta-catenin. RESULTS Fourteen of the 20 BCC samples tested showed nuclear localization of beta-catenin, while none of the other samples gave rise to positive nuclear staining. CONCLUSIONS Nuclear localization of beta-catenin is a characteristic feature of BCC; this suggests its tumorigenic role in this tumour. This gives us a further insight into the molecular pathogenesis of BCC.
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Affiliation(s)
- F Yamazaki
- Department of Dermatology, Kinki University School of Medicine, 377-2 Ohnohigashi, Osakasayama-shi, 589-8511 Osaka, Japan
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36
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Miyamoto N, Sugita K, Goi K, Inukai T, Lijima K, Tezuka T, Kojika S, Nakamura M, Kagami K, Nakazawa S. The JAK2 inhibitor AG490 predominantly abrogates the growth of human B-precursor leukemic cells with 11q23 translocation or Philadelphia chromosome. Leukemia 2001; 15:1758-68. [PMID: 11681418 DOI: 10.1038/sj.leu.2402260] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.9] [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: 11/09/2022]
Abstract
The Janus kinase (JAK) family is one of intracellular protein tyrosine kinases (PTKs) present in hematopoietic and lymphoid cells and has been shown to play a crucial role in a variety of biological responses. It was reported that a human B-precursor leukemic cell line was potently inhibited in its proliferation by one of synthetic PTK inhibitors (tyrphostins), AG490, via anti-JAK2 activity. However, no extensive studies about it have been performed. In the present study, we tested 16 human lymphoid leukemic cell lines (B-precursor, 12; T cell, four) for their sensitivity to AG490 using 3H-thymidine incorporation and colony formation assays, and found that B-precursor cell lines with 11q23 translocation or Philadelphia chromosome (Ph1) whose JAK2 proved to be constitutively phosphorylated were predominantly sensitive to AG490 at a concentration that has few inhibitory effect on normal hematopoiesis. We first revealed the association of JAK2 with BCR-ABL in Ph1-positive cell lines and with Bruton's tyrosine kinase (BTK) in cell lines with 11q23 translocation by coimmunoprecipitation experiments. Of interest, AG490 markedly down-regulated phosphorylation of JAK2, but rather transiently up-regulated phosphorylation of BCR-ABL and BTK, suggesting direct implication of AG490 in the process of the JAK2 dephosphorylation. These results indicate that AG490 exerts a potent inhibitory activity to B-precursor leukemia with specific chromosomal abnormalities, and a therapeutic approach using AG490 is expected.
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MESH Headings
- Antineoplastic Agents/pharmacology
- Cell Division/drug effects
- Chromosomes, Human, Pair 11
- DNA, Neoplasm/biosynthesis
- Dose-Response Relationship, Drug
- Enzyme Inhibitors/pharmacology
- Fusion Proteins, bcr-abl/metabolism
- Humans
- Janus Kinase 2
- Leukemia, Lymphoid/genetics
- Leukemia, Lymphoid/metabolism
- Leukemia, Lymphoid/pathology
- Philadelphia Chromosome
- Phosphorylation
- Precursor B-Cell Lymphoblastic Leukemia-Lymphoma/genetics
- Precursor B-Cell Lymphoblastic Leukemia-Lymphoma/metabolism
- Precursor B-Cell Lymphoblastic Leukemia-Lymphoma/pathology
- Protein-Tyrosine Kinases/antagonists & inhibitors
- Protein-Tyrosine Kinases/metabolism
- Proto-Oncogene Proteins
- Translocation, Genetic
- Tumor Cells, Cultured
- Tumor Stem Cell Assay
- Tyrphostins/pharmacology
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Affiliation(s)
- N Miyamoto
- Department of Pediatrics, Yamanashi Medical University, Japan
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37
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Tezuka T, Sugita K, Sato H, Uno K, Yamakawa N, Goi K, Inukai T, Nakazawa S. [Transient myelodysplasia associated with human parvovirus B19 infection in a child without underlying disease]. Rinsho Ketsueki 2001; 42:1096-100. [PMID: 11808077] [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: 02/23/2023]
Abstract
Human parvovirus B19 (HPV-B19) infection is known to frequently induce aplastic crisis in patients with hemolytic anemia, but rarely causes hematological disorders in healthy subjects. We report a 5-year-old boy who showed transient myelodysplasia associated with HPV-B19 infection. He was admitted with severe nasal bleeding, and laboratory data showed marked thrombocytopenia (1,000/microliter), anemia (Hb: 8.4 g/dl), and mild leukopenia (3,000/microliter). A bone marrow smear revealed myelodysplastic changes in three cell lineages, but no giant proerythroblasts or megakaryocytes. The pancytopenia and myelodysplastic changes were resolved spontaneously within a week without any medication other than transfusion of red blood cells and platelets. Serological examination revealed an elevation of IgG antibody against HPV-B19 on days 15 and 120 and its subsequent decrease thereafter, although HPV-B19-specific DNA was not detected in the serum at onset. The clinical course and laboratory data suggest an etiologic role of HPV-B19 infection in the occurrence of transient myelodysplasia.
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Affiliation(s)
- T Tezuka
- Department of Pediatrics, Yamanashi Medical University
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38
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Maeda A, Aragane Y, Kawada A, Isogai R, Orita T, Tezuka T. A case of acral lentginous melanoma: the correlation between CD95L expression on melanoma cells and apoptosis of tumor infiltrating lymphocytes. J Dermatol 2001; 28:499-504. [PMID: 11603392 DOI: 10.1111/j.1346-8138.2001.tb00019.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
There is an increasing amount of evidence that melanoma cells express the ligand for CD95 (CD95L), a potent inducer of apoptosis which contributes to creating the immune privileged circumstances of tumor sites. However, it still remains to be demonstrated whether the capacity of melanoma cells to express CD95L is acquired during the progression. We addressed this question with a case of acral lentiginous melanoma by employing immunostaining using an antibody directed against CD95L as well as by in situ TUNEL staining. H&E-staining of tumor specimens revealed that there were two different growth patterns. The central part of the tumor showed a deeper invasion into the dermis (Breslow thickness >4 -mm). The horizontally growing edge of the tumor proliferated more superficially (Breslow thickness<3-mm). Relatively fewer lymphocytes were observed around the melanoma nests in central areas, which expressed detectable amounts of CD95L. In contrast, more lymphocytes were observed among the melanoma cells in the peripheral lesion, where CD95L was not detected. To evaluate the relevance of the CD95L expression, in situ TUNEL staining was performed. This indicated a significant correlation of lymphocyte apoptosis with CD95L expression on melanoma cells. Together the data suggest that expression of CD95L is turned on depending on the level of melanoma, and that it may tribute to creating immune privileged circumstances by initiating apoptosis of tumor filrating lymphocytes.
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Affiliation(s)
- A Maeda
- Department of Dermatology Kinki University School of Medicine, Osaka, Japan
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Affiliation(s)
- M Asai
- Department of Dermatology, Kinki University School of Medicine, Ohno-Higashi 377-2, Osaka-Sayama City, Osaka 589-8511, Japan
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40
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Affiliation(s)
- A Kawada
- Department of Dermatology, Kinki University School of Medicine, Ohno-Higashi 377-2, Osaka-Sayama City, Osaka 589-8511, Japan
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41
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Abstract
Diffuse neonatal hemangiomatosis is a rare disease with the distinctive features of multiple hemangiomas of the skin and visceral organs. These lesions have been treated with systemic corticosteroids, interferon-alpha, and their combination. We report a patient with diffuse neonatal hemangiomatosis who had multiple cutaneous and hepatic hemangiomas. Single therapy with the flashlamp pulsed dye laser was effective for cutaneous hemangiomas, whereas the hemangiomas of the liver remained stable and no liver dysfunction or hemorrhage has occurred so far, even with no treatment.
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Affiliation(s)
- H Endo
- Department of Dermatology, Kinki University School of Medicine, Osaka, Japan
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42
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Affiliation(s)
- A Kawada
- Department of Dermatology, Kinki University School of Medicine, Osaka, Japan
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Aragane Y, Kawada A, Maeda A, Isogai R, Isogai N, Tezuka T. Disseminated scleroderma of a Japanese patient successfully treated with bath PUVA photochemotherapy. J Cutan Med Surg 2001; 5:135-9. [PMID: 11443486 DOI: 10.1007/bf02737868] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [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: 11/30/2022]
Abstract
BACKGROUND Localized scleroderma is known to be resistant to therapies. Recently, it has been reported that bath PUVA photochemotherapy is effective for treating this dermatosis. OBJECTIVES Although according in earlier reports mainly white populations have been treated successfully with bath PUVA therapy, there is little knowledge of whether it is effective in treating colored populations. We treated a 64-year-old Japanese woman suffering from disseminated scleroderma with bath PUVA photochemotherapy to see its effects. CONCLUSION Although rather high cumulative UVA doses were required for this patient compared with those needed in earlier reports, no adverse effects were observed. The lesions were markedly improved, suggesting that this therapeutic modality is well-tolerated and useful for colored patients such as the Japanese. Furthermore, it turns out that the thermographical assessment is useful to estimate clinical improvement of this sclerosing skin disorder.
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Affiliation(s)
- Y Aragane
- Department of Dermatology, Kinki University School of Medicine, Osakasayama-shi, Osaka, Japan.
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44
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Affiliation(s)
- A Kawada
- Department of Dermatology, Kinki University School of Medicine, Osaka-Sayama City, Osaka, Japan
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45
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Nakazawa T, Komai S, Tezuka T, Hisatsune C, Umemori H, Semba K, Mishina M, Manabe T, Yamamoto T. Characterization of Fyn-mediated tyrosine phosphorylation sites on GluR epsilon 2 (NR2B) subunit of the N-methyl-D-aspartate receptor. J Biol Chem 2001; 276:693-9. [PMID: 11024032 DOI: 10.1074/jbc.m008085200] [Citation(s) in RCA: 376] [Impact Index Per Article: 16.3] [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: 01/06/2023] Open
Abstract
The N-methyl-d-aspartate (NMDA) receptors play critical roles in synaptic plasticity, neuronal development, and excitotoxicity. Tyrosine phosphorylation of NMDA receptors by Src-family tyrosine kinases such as Fyn is implicated in synaptic plasticity. To precisely address the roles of NMDA receptor tyrosine phosphorylation, we identified Fyn-mediated phosphorylation sites on the GluR epsilon 2 (NR2B) subunit of NMDA receptors. Seven out of 25 tyrosine residues in the C-terminal cytoplasmic region of GluR epsilon 2 were phosphorylated by Fyn in vitro. Of these 7 residues, Tyr-1252, Tyr-1336, and Tyr-1472 in GluR epsilon 2 were phosphorylated in human embryonic kidney fibroblasts when co-expressed with active Fyn, and Tyr-1472 was the major phosphorylation site in this system. We then generated rabbit polyclonal antibodies specific to Tyr-1472-phosphorylated GluR epsilon 2 and showed that Tyr-1472 of GluR epsilon 2 was indeed phosphorylated in murine brain using the antibodies. Importantly, Tyr-1472 phosphorylation was greatly reduced in fyn mutant mice. Moreover, Tyr-1472 phosphorylation became evident when hippocampal long term potentiation started to be observed, and its magnitude became larger in murine brain. Finally, Tyr-1472 phosphorylation was significantly enhanced after induction of long term potentiation in the hippocampal CA1 region. These data suggest that Tyr-1472 phosphorylation of GluR epsilon 2 is important for synaptic plasticity.
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Affiliation(s)
- T Nakazawa
- Department of Oncology, Institute of Medical Science, University of Tokyo, Tokyo 108-8639, Japan
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46
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Nakayama T, Fujisawa R, Yamada H, Horikawa T, Kawasaki H, Hieshima K, Izawa D, Fujiie S, Tezuka T, Yoshie O. Inducible expression of a CC chemokine liver- and activation-regulated chemokine (LARC)/macrophage inflammatory protein (MIP)-3 alpha/CCL20 by epidermal keratinocytes and its role in atopic dermatitis. Int Immunol 2001; 13:95-103. [PMID: 11133838 DOI: 10.1093/intimm/13.1.95] [Citation(s) in RCA: 150] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Liver-and activation-regulated chemokine (LARC)/macrophage inflammatory protein (MIP)-3alpha/CCL20 is a CC chemokine which is constitutively expressed by follicle-associated epithelial cells in the mucosa, and attracts cells expressing CCR6 such as immature dendritic cells and alpha(4)beta(7)(high) intestine-seeking memory T cells. Here, we examine LARC/CCL20 expression in the skin. LARC/CCL20 mRNA and protein were induced in primary human keratinocytes upon stimulation with proinflammatory cytokines such as IL-1alpha and tumor necrosis factor (TNF)-alpha. In mice, intradermal injection of IL-1alpha and TNF-alpha rapidly induced a local accumulation of transcripts for LARC/CCL20 and its receptor CCR6 with a lag of several hours in the latter. In humans, immunostaining of LARC/CCL20 was weak if any in normal skin tissues but strongly augmented in lesional skin tissues with atopic dermatitis. Furthermore, massive infiltration of cells with markers such as CD1a, CD3 or HLA-DR was present in atopic skin lesions. Many infiltrating cells were also found to be CCR6(+) by a newly generated monoclonal anti-CCR6. However, Langerhans cells residing within the epidermis were hardly stained by anti-CCR6 in normal and atopic skin tissues. Furthermore, plasma levels of LARC/CCL20 were found to be elevated in patients with atopic dermatitis. Collectively, our results suggest that epidermal keratinocytes produce LARC/CCL20 upon stimulation with proinflammatory cytokines such as IL-1alpha and TNF-alpha, and attract CCR6-expressing immature dendritic cells and memory/effector T cells into the dermis of inflamed skin such as atopic dermatitis. LARC/CCL20 may not, however, play a major role in homeostatic migration of Langerhans cells into the skin.
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MESH Headings
- Adult
- Animals
- Cell Line
- Cells, Cultured
- Chemokine CCL20
- Chemokines, CC/biosynthesis
- Chemokines, CC/blood
- Chemokines, CC/genetics
- Chemotaxis, Leukocyte/immunology
- Dermatitis, Atopic/immunology
- Dermatitis, Atopic/metabolism
- Dermatitis, Atopic/pathology
- Female
- Humans
- Injections, Intradermal
- Interleukin-1/administration & dosage
- Keratinocytes/immunology
- Keratinocytes/metabolism
- Macrophage Inflammatory Proteins/biosynthesis
- Macrophage Inflammatory Proteins/blood
- Macrophage Inflammatory Proteins/genetics
- Male
- Mice
- Mice, Inbred BALB C
- RNA, Messenger/biosynthesis
- Receptors, CCR6
- Receptors, Chemokine/metabolism
- Skin/immunology
- Skin/metabolism
- Tumor Necrosis Factor-alpha/administration & dosage
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Affiliation(s)
- T Nakayama
- Department of Bacteriology, Kinki University School of Medicine, Osaka-Sayama 589-8511, Japan
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Abstract
Interaction of CD95 ligand with its cognate receptor CD95 induces apoptotic cell death. Alterations in this pathway within tumor cells can result in escape from apoptosis and from immune surveillance. Melanoma cells recently were found to escape an immune attack via high expression of CD95 ligand, thereby inducing apoptosis of activated T lymphocytes. When screening four human melanoma cell lines for expression of CD95 and CD95 ligand, respectively, an inverse correlation was found, i.e., cells expressing high levels for CD95 ligand (CD95L(high)) were almost negative for CD95 and vice versa. Since coexpression of CD95 and CD95 ligand may lead to apoptosis by autocrine suicide or fratricide, it was tested whether overexpression of CD95 in CD95L(high) melanoma cells results in apoptotic cell death. Upon transfection with a cytomegalovirus-promoter-driven expression vector encoding the CD95 gene, CD95L(high) melanoma cells underwent apoptosis at a much higher level than CD95L(low) melanoma cells. Apoptosis appeared to be due to the activation of CD95 as cell death was inhibited by cotransfection with a dominant negative mutant for the CD95 signaling protein, Fas-associated protein with death domain. Tumor progression of CD95L(high) melanoma cells transplanted into nude mice was significantly reduced when recipient animals were injected with liposomes containing the CD95 expression vector. As demonstrated by immunohistochemistry and TUNEL staining, in vivo transfected tumor cells expressed CD95 and underwent apoptotic cell death. Hence, this study indicates that delivery of the CD95 gene inhibits tumor growth in vivo and thus might be a therapeutic strategy to treat tumor cells that express high levels of CD95 ligand. J Invest Dermatol 115:1008-1014 2000
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Affiliation(s)
- Y Aragane
- Department of Dermatology, Kinki University School of Medicine, Osakasayama, Japan
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Kanno T, Kawada A, Yamanouchi J, Yosida-Noro C, Yoshiki A, Shiraiwa M, Kusakabe M, Manabe M, Tezuka T, Takahara H. Human peptidylarginine deiminase type III: molecular cloning and nucleotide sequence of the cDNA, properties of the recombinant enzyme, and immunohistochemical localization in human skin. J Invest Dermatol 2000; 115:813-23. [PMID: 11069618 DOI: 10.1046/j.1523-1747.2000.00131.x] [Citation(s) in RCA: 103] [Impact Index Per Article: 4.3] [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: 11/20/2022]
Abstract
Peptidylarginine deiminase catalyzes the post-translational modification of proteins through the conversion of arginine to citrulline in the presence of calcium ions. In rodents, peptidylarginine deiminase has been classified into four isoforms, types I, II, III, and IV, which are distinct in their molecular weights, substrate specificities, and tissue localization. Of these isoforms, only type III was detected in epidermis and hair follicles. Although the role of this enzyme in these tissues is not yet clear, indirect data have shown that several structural proteins such as filaggrin, trichohyalin, and keratin are substrates for peptidylarginine deiminase. In this study, we cloned the full-length cDNA of human peptidylarginine deiminase type III (3142 bp) from cultured human keratinocytes by reverse transcription-polymerase chain reaction and by rapid amplification of cDNA ends methods. This cDNA contained a 1995 bp open reading frame encoding 664 amino acids (Mr = 74 770). To explore the physicochemical and enzymatic properties of human peptidylarginine deiminase type III, we constructed a plasmid for producing a recombinant human peptidylarginine deiminase type III in bacteria. The enzymatic characteristics of the recombinant enzyme were very similar to those of the rodent peptidylarginine deiminase type III. The recombinant enzyme showed the catalytic activities toward structural proteins of epidermis and hair follicle, filaggrin and trichohyalin, in which the deiminations maxima of about 60% and 13% arginine residues were observed in filaggrin and trichohyalin, respectively. An immunohistochemical study of human scalp skin with a monospecific anti-peptidyl-arginine deiminase type III antibody revealed that the type III enzyme was localized to the inner root sheath and outer root sheath of hair follicles. Peptidylarginine deiminase type III in the inner root sheath was notable between supramatrix and keratogenous zone and was scarcely detected in cornified hair zone. The enzyme was also expressed in the cuticle layer of hair. On the other hand, expression of the enzyme in the epidermis was very low. These data imply that human peptidylarginine deiminase type III is the predominant isoform in hair follicles and may function as a modulator of hair structural proteins, including trichohyalin during hair and hair follicle formation.
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Affiliation(s)
- T Kanno
- Department of Applied Biological Resource Science, School of Agriculture, Ibaraki University, Ami-machi, Inashiki-gun, Ibaraki, Japan; Department of Dermatology, School of Medicine, Kinki University, Oonohigashi, Osakasayama-shi, Osak
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49
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Iijima K, Sugita K, Inukai T, Goi K, Tezuka T, Uno K, Sato H, Kagami K, Nakazawa S. Expression of thrombopoietin receptor and its functional role in human B-precursor leukemia cells with 11q23 translocation or Philadelphia chromosome. Leukemia 2000; 14:1598-605. [PMID: 10995006 DOI: 10.1038/sj.leu.2401893] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Thrombopoietin (TPO) is a hematopoietic growth factor which plays a central role in normal megakaryocytopoiesis and thrombopoiesis. Although the interaction between TPO and its receptor c-Mpl encoded by the c-mpl gene is now known to be implicated in the proliferation and/or differentiation of abnormal myeloid cells and normal hematopoietic stem cells, little is known about a role of the TPO/c-Mpl system in lymphoid leukemia cells. In the present study, we first examined the expression of c-mpl/c-Mpl in 23 human lymphoid leukemic cell lines (T-lineage 4, B-lineage 19) using three distinct methods. The c-mpl mRNA was detectable in as many as 20 cell lines (T-lineage 3, B-lineage 17) by reverse transcriptase-polymerase chain reaction, but its translated product, c-Mpl, was demonstrable by Western blot only in B-lineage cell lines. Flow cytometric analysis revealed the surface c-Mpl expression in 13 of 17 B-lineage cell lines, but its higher expression (>40%) was restricted in nine B-precursor cell lines, eight of which had 11q23 translocation or Philadelphia chromosome (Ph1). We also demonstrated that two of eight cell lines with 11q23 translocation or Ph1 exhibited a significant proliferative response to TPO in the 3H-thymidine uptake and colony-forming assays. Triggering of these cell lines by TPO transiently up-regulated tyrosine phosphorylation of JAK-2 and Shc, indicating that their receptor is functional. Primary leukemia cells separated from patients with B-precursor acute lymphoblastic leukemia with Ph1 or 11q23 translocation also showed the surface c-Mpl expression and a significant responsiveness to TPO. These results suggest that the TPO/c-Mpl interaction may play a physiological role in the growth regulation of B-precursor leukemia cells particularly with specific chromosomal abnormalities.
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MESH Headings
- Antigens, Surface/biosynthesis
- Chromosome Mapping
- Chromosomes, Human, Pair 11
- DNA/biosynthesis
- Gene Expression
- Humans
- Leukemia, Lymphoid/genetics
- Leukemia, Lymphoid/metabolism
- Neoplasm Proteins
- Philadelphia Chromosome
- Phosphorylation
- Proto-Oncogene Proteins/biosynthesis
- Proto-Oncogene Proteins/genetics
- Proto-Oncogene Proteins/metabolism
- RNA, Messenger/metabolism
- Receptors, Cytokine
- Receptors, Thrombopoietin
- Thrombopoietin/metabolism
- Thymidine/metabolism
- Translocation, Genetic
- Tritium
- Tumor Cells, Cultured
- Tumor Stem Cell Assay
- Tyrosine/metabolism
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Affiliation(s)
- K Iijima
- Department of Pediatrics, Yamanashi Medical University, Japan
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50
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Inukai T, Sugita K, Mitsui K, Iijima K, Goi K, Tezuka T, Kojika S, Kagami K, Mori T, Kinoshita A, Suzuki T, Okazaki-Koyama T, Nakazawa S. Participation of granulocyte colony-stimulating factor in the growth regulation of leukemia cells from Philadelphia chromosome-positive acute leukemia and blast crisis of chronic myeloid leukemia. Leukemia 2000; 14:1386-95. [PMID: 10942233 DOI: 10.1038/sj.leu.2401837] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Granulocyte colony-stimulating factor (G-CSF) has been shown to support the growth of multipotential hematopoietic stem cells in addition to the cells of neutrophilic lineage. Philadelphia chromosome (Ph1)-positive leukemia has its origin in the hematopoietic stem cell. In the present study, we demonstrated that the proliferation of leukemic cells from chronic myeloid leukemia in blast crisis (CML-BC) and Ph1-positive acute lymphoblastic leukemia (ALL) cases is frequently stimulated with G-CSF in vitro. We next studied a total of 12 leukemic cell lines established from CML-BC (n= 6) and Ph1-positive acute leukemia (n= 6): four 'myeloid', five 'biphenotypic', and three 'lymphoid' types. All cell lines expressed G-CSF receptor (G-CSFR) in flow cytometric analysis, but their proliferative response to G-CSF in 3H-thymidine incorporation assay varied. The 'biphenotypic' cell lines expressed G-CSFR at higher levels and showed the most pronounced response to G-CSF. The 'lymphoid' cell lines showed intermediate G-CSFR expression with the modest response to G-CSF. Unexpectedly, 'myeloid' cell lines showed lower G-CSFR expression and lower G-CSF response compared with 'biphenotypic' cell lines. In three of four 'myeloid' cell lines, proliferation was partially inhibited by an addition of anti-G-CSF neutralizing monoclonal antibody into culture medium. Further, the % inhibition of 3H-thymidine uptake of cell lines positively correlated with the amount of their intracellular G-CSF measured by enzyme immunoassay, suggesting an autocrine growth mechanism via the G-CSF/G-CSFR interaction. These results suggest that G-CSF play an important role in the growth regulation of leukemia cells from Ph1-positive acute leukemia and CML-BC.
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Affiliation(s)
- T Inukai
- Department of Pediatrics, Yamanashi Medical University, Japan
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