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Okada K, Furusyo N, Kainuma M, Ogawa E, Mukae H, Toyoda K, Murata M, Hayashi J. Raloxifene improves arterial stiffness and the carotid IMT progression in postmenopausal osteopenia/osteoporosis women over 12 months. Atherosclerosis 2015. [DOI: 10.1016/j.atherosclerosis.2015.04.503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Ogawa E, Ito A, Arai T. Immediate response and cytotoxicity effect on myocardial cells by extracellular photosensitization reaction varying irradiance. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2015; 2014:5316-9. [PMID: 25571194 DOI: 10.1109/embc.2014.6944826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
We investigated the extracellular photosensitization effect on myocardial cells using talaporfin sodium at various irradiance measuring cell lethality dependence on talaporfin sodium concentration and immediate response of intracellular Ca(2+) as a fundamental study of the application for tachyarrhythmia treatment. The myocardial cell lethality was measured 2 h after the photosensitization reaction by WST assay varying the irradiance from 0.12 to 0.66 W/cm(2). The intracellular Ca(2+) of myocardial cell was observed during and until 10 min after the extracellular photosensitization reaction using fluo-4 AM and a confocal microscope varying the irradiance. The linear increasing behavior of the myocardial cell lethality with talaporfin sodium concentration was similarly obtained in the case of 0.12 and 0.29 W/cm(2) in irradiance. The photocytotoxicity was not obtained in the case of 0.46 and 0.66 W/cm(2) in irradiance. The time response of necrosis occurrence after the beginning of the extracellular photosensitization reaction was decreased with the irradiance increasing. We prospect that it may be caused by oxygen depletion in our in vitro system using 96 well plate since the irradiance and talaporfin sodium concentration were higher comparing the in vitro conditions of the general PDT for cancer.
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Gu YH, Kodama H, Ogawa E, Sato Y, Motoyama K, Yagi M, Yoshida S, Ohkubo T. Changes in body weight and height in survivors of Menkes disease. J Trace Elem Med Biol 2014; 28:470-3. [PMID: 25150085 DOI: 10.1016/j.jtemb.2014.07.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
OBJECTIVE To explore the changes in the body weight and height of Menkes disease (MNK) patients treated with long-term copper-histidine. METHODS A survey involving a retrospective review of medical records or summaries of MNK patients was conducted. Patients were 44 males born after 1994, and their feeding method and genetic analysis of the ATP7A gene were reviewed. We compared the data of body weight and height from birth until 6 years between classical MNK patients and the general population obtained from national data and between patients who received early treatment and patients who received late treatment. RESULTS Although five patients who received early treatment reached some developmental milestones, the body weight and height did not differ from patients who received late treatment in the mode of oral nutrition, and were lower in comparison to the national data (<3 percentile). CONCLUSION We reported changes in the body weight and height of MNK patients who received early and late treatment. Although early treatment with copper-histidine had favorable effects on neurological development, it did not result in improvements in body weight and height. We suggest that the establishment of sufficient nutritional support is necessary along with early parenteral copper treatment to improve whole body condition in MNK patients.
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Mikoshiba Y, Ogawa E, Uchiyama R, Uchiyama A, Uhara H, Okuyama R. 5-Hydroxymethylcytosine is a useful marker to differentiate between dermatofibrosarcoma protuberans and dermatofibroma. J Eur Acad Dermatol Venereol 2014; 30:130-1. [PMID: 25087918 DOI: 10.1111/jdv.12614] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Urano F, Ono S, Tanaka T, Ueno K, Ogawa E, Mamehara A, Suzuki S, Tanaka H. THU0078 Hla-B27 Prevalence in Patients with Ankylosing Spondylitis in A Province of Japan, Compared with Tokyo. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.1214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Ogawa E, Furusyo N, Hayashi J. Commentary: Triple therapy for patients with chronic hepatitis C and advanced fibrosis? Authors' reply. Aliment Pharmacol Ther 2013; 38:1408. [PMID: 24206375 DOI: 10.1111/apt.12539] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2013] [Accepted: 10/08/2013] [Indexed: 12/19/2022]
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Ogawa E, Furusyo N, Murata M, Ikezaki H, Ihara T, Hayashi T, Toyoda K, Okada K, Kainuma M, Kajiwara E, Takahashi K, Satoh T, Hayashi J. Valuable antiviral therapeutic options for the treatment of chronic hepatitis C patients with thrombocytopenia. J Viral Hepat 2013; 20:838-46. [PMID: 24304453 DOI: 10.1111/jvh.12109] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2012] [Accepted: 02/21/2013] [Indexed: 01/22/2023]
Abstract
Thrombocytopenia in patients with chronic hepatitis C may represent an obstacle for the initiation of antiviral treatment. The aim of this study was to evaluate factors predictive of successful pegylated interferon (PEG-IFN) α2b and ribavirin (RBV) treatment for patients with thrombocytopenia with no history of splenectomy or partial splenic embolization. One hundred and fifty-one chronic hepatitis C patients (genotype 1: n = 110, genotype 2: n = 41) with TCP (<100 × 10(9) /L) at baseline were enrolled. Pretreatment variables included interleukin 28B (IL28B) genotype (rs8099917) and homoeostasis model assessment of insulin resistance score (HOMA-IR). The kinetics of haemoglobin and platelets according to the inosine triphosphatase (ITPA) genotype (rs1127354) were investigated. Sustained virological response (SVR) was significantly more frequent in hepatitis C virus (HCV) genotype 2 (65.9%) than in genotype 1 (34.5%) patients (P < 0.0001). Multiple logistic regression analysis of HCV genotype 1 extracted IL28B TT genotype [odds ratio (OR) 5.97, P = 0.006] and HOMA-IR <2.5 (OR 7.14, P = 0.0016) as significant independent pretreatment predictors of SVR. The analyses of HCV genotype 2 showed that HOMA-IR was significantly related to SVR, but IL28B genotype was not. Patients with ITPA CC genotype showed a significant haemoglobin reduction and lower degree of platelets decrease than those with ITPA CA/AA genotypes. The most common reason for premature discontinuation of treatment was the development of hepatocellular carcinoma (n = 8, 5.3%). In conclusion, HOMA-IR is a useful predictor of SVR for patients with thrombocytopenia infected with HCV genotype 1 or 2 treated with PEG-IFNα2b and RBV. The inclusion of IL28B, ITPA genotypes and HOMA-IR adds valuable therapeutic information.
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Ogawa E, Furusyo N, Nakamuta M, Kajiwara E, Nomura H, Dohmen K, Takahashi K, Satoh T, Azuma K, Kawano A, Tanabe Y, Kotoh K, Shimoda S, Hayashi J. Telaprevir-based triple therapy for chronic hepatitis C patients with advanced fibrosis: a prospective clinical study. Aliment Pharmacol Ther 2013; 38:1076-85. [PMID: 24099469 DOI: 10.1111/apt.12494] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2013] [Revised: 07/27/2013] [Accepted: 08/29/2013] [Indexed: 12/20/2022]
Abstract
BACKGROUND Antiviral treatment is recommended for chronic hepatitis C patients with advanced fibrosis to reduce and prevent cirrhosis-related complications. AIM To evaluate the efficacy and safety of telaprevir (TVR)-based triple therapy for patients with advanced fibrosis in a clinical practice setting. METHODS This prospective, multicentre study consisted of 102 patients with advanced fibrosis (METAVIR score F3-4) who were infected with HCV genotype 1b. All received 12 weeks of TVR in combination with 24 weeks of pegylated interferon (PEG-IFN) α2b and ribavirin (RBV). RESULTS The sustained virological response (SVR) rate was 69.6% (71 of 102). Notably, for treatment-naïve and prior relapse patients the SVR rate was over 80%. Previous treatment response, interleukin 28B polymorphism (rs8099917) and rapid virological response (undetectable HCV RNA at week 4) were independently associated with SVR. To achieve SVR, an adequate dosage of PEG-IFNα2b (≥1.2 μg/kg/week) and RBV (≥7.5 mg/kg/day) is preferable; however, the mean weight-adjusted TVR dosage had little impact on treatment outcome. Although severe blood cytopaenia and a dermatological disorder were frequently found, the rate of discontinuation due to adverse effects was 12.7%. The inosine triphosphatase CC allele (rs1127354) was independently associated with the development of severe anaemia, and lower serum albumin level (<35 g/L) was associated with the occurrence of infection. CONCLUSIONS The great gain in the SVR rate by telaprevir-based triple therapy offsets the problems with adverse effects; thus, it should be considered as a potent treatment protocol for patients with advanced fibrosis, especially for those with treatment-naïve and prior relapse.
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Fukatsu K, Ogawa E, Yanagawa M, Murakoshi S, Fukushima R, Yasuhara H. PP066-SUN SEVERE GUT ISCHEMIA REPERFUSION CAUSES PROLONGED REDUCTION OF HEPATIC MONONUCLEAR CELL NUMBER IN MICE. Clin Nutr 2013. [DOI: 10.1016/s0261-5614(13)60111-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Fukuda T, Fukatsu K, Ogawa E, Mitsui T, Yasuhara H, Seto Y. PP053-MON INTRAPERITONEAL INJECTION OF ADIPOSE-DERIVED MESENCHYMAL STEM CELLS IMPROVES SURVIVAL AFTER GUT ISCHEMIA-REPERFUSION WITH CYTOKINE MODULATION. Clin Nutr 2013. [DOI: 10.1016/s0261-5614(13)60365-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Kimura T, Takatsuki S, Miyoshi S, Fukumoto K, Ito A, Takahashi M, Ogawa E, Motohashi S, Arai T, Fukuda K. Non-thermal photodynamic therapy: a radical and reliable approach to cardiac catheter ablation. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht308.1909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Katsushima Y, Sato T, Yamada C, Ito M, Suzuki Y, Ogawa E, Sukegawa I, Sukegawa J, Fukunaga K, Yanagisawa T. Interaction of PICK1 with C-terminus of growth hormone-releasing hormone receptor (GHRHR) modulates trafficking and signal transduction of human GHRHR. J Pharmacol Sci 2013; 122:193-204. [PMID: 23823934 DOI: 10.1254/jphs.12287fp] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
Abstract
Release of growth hormone (GH) from the somatotroph is regulated by binding GH-releasing hormone (GHRH) to its cognate receptor (GHRHR), one of the members of the G protein-coupled receptor (GPCR) superfamily. Proteins bound to the carboxy (C)-terminus of GPCR have been reported to regulate intracellular trafficking and function of the receptor; however, no functionally significant protein associated with GHRHR has been reported. We have identified a protein interacting with C-kinase 1 (PICK1) as a binding partner of GHRHR. In vitro binding assay revealed the PDZ-domain of PICK1 and the last four amino acid residues of GHRHR were prerequisite for the interaction. Further, in vivo association of these proteins was confirmed. Immunostaining data of a stable cell line expressing GHRHR with or without PICK1 suggested the C-terminus of GHRHR promoted cell surface expression of GHRHR and PICK1 affected the kinetics of the cell surface expression of GHRHR. Furthermore, cAMP production assay showed the C-terminus of GHRHR is involved in the regulation of receptor activation, and the interaction of GHRHR with PICK1 may influence intensities of the signal response after ligand stimulation. Thus, the interaction of the C-terminus of GHRHR with PICK1 has a profound role in regulating the trafficking and the signaling of GHRHR. [Supplementary Figure: available only at http://dx.doi.org/10.1254/jphs.12287FP].
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Arinuma Y, Kikuchi H, Ogawa E, Wada T, Nagai T, Tanaka S, Hirohata S. FRI0327 Brain mri findings in patients with diffuse psychiatric/neuropsychological syndromes in systemic lupus erythematosus. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.1454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Furusyo N, Murata M, Ogawa E, Nomura H, Hayashi J. P277 Significant factors for incidence of hepatocellular carcinoma after sustained virological response to antiviral treatment for chronic hepatitis C. Int J Antimicrob Agents 2013. [DOI: 10.1016/s0924-8579(13)70518-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Furusyo N, Murata M, Ogawa E, Nomura H, Hayashi J. P279 Reduction of hepatocellular carcinoma recurrence by pegylated interferon alpha-2b plus ribavirin treatment for chronic hepatitis C patients. Int J Antimicrob Agents 2013. [DOI: 10.1016/s0924-8579(13)70520-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Yoshitoshi EY, Yoshizawa A, Ogawa E, Kaneshiro M, Takada N, Okamoto S, Fujimoto Y, Sakamoto S, Masuda S, Matsuura M, Nakase H, Chiba T, Tsuruyama T, Haga H, Uemoto S, Uemoto S. The challenge of acute rejection in intestinal transplantation. Pediatr Surg Int 2012; 28:855-9. [PMID: 22760434 DOI: 10.1007/s00383-012-3110-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 05/30/2012] [Indexed: 10/28/2022]
Abstract
Early diagnosis and treatment of acute cellular rejection (ACR) after intestinal transplantation (ITx) is challenging. We report the outcome of three patients: two presented mild ACR improved with steroids. One presented steroid-resistant severe rejection, improved after rabbit anti-thymocyte globulin (r-ATG), but unfortunately died for encephalitis caused by opportunistic infections.
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Bhadhprasit W, Kodama H, Fujisawa C, Hiroki T, Ogawa E. Effect of copper and disulfiram combination therapy on the macular mouse, a model of Menkes disease. J Trace Elem Med Biol 2012; 26:105-8. [PMID: 22664332 DOI: 10.1016/j.jtemb.2012.05.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/01/2012] [Accepted: 04/30/2012] [Indexed: 11/20/2022]
Abstract
Menkes disease (MD) is a genetic neurodegenerative disorder characterized by copper deficiency due to a defect in ATP7A. Standard treatment involves parenteral copper-histidine administration. However, the treatment is ineffective if initiated after two months of age, because the administered copper accumulates in the blood-brain barrier and is not transported to neurons. To resolve this issue, we investigated the effects of a combination therapy comprising copper and disulfiram, a lipophilic chelator, in the macular mouse, an animal model of MD. Seven-day-old macular mice treated subcutaneously with 50 μg of CuCl(2) on postnatal day 4 were used. The mice were given a subcutaneous injection of CuCl(2) (10 μg) with oral administration of disulfiram (0.3mg/g body weight) twice a week until eight weeks of age, and then sacrificed. Copper concentrations in the cerebellum, liver, and serum of treated macular mice were significantly higher than those of control macular mice, which received only copper. Mice treated with the combination therapy exhibited higher cytochrome c oxidase activity in the brain. The ratios of noradrenaline and adrenaline to dopamine in the brain were also increased by the treatment, suggesting that dopamine β-hydroxylase activity was improved by the combination therapy. Liver and renal functions were almost normal, although renal copper concentration was higher in treated macular mice than in controls. These results suggest that disulfiram facilitates the passage of copper across the blood-brain barrier and that copper-disulfiram combination therapy may be an effective treatment for MD patients.
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Ogawa E, Kodama H. Effects of disulfiram treatment in patients with Menkes disease and occipital horn syndrome. J Trace Elem Med Biol 2012; 26:102-4. [PMID: 22575542 DOI: 10.1016/j.jtemb.2012.04.017] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/02/2012] [Accepted: 04/02/2012] [Indexed: 01/11/2023]
Abstract
The clinical and biochemical effects of disulfiram were evaluated in three boys with the disorders characterized by copper deficiency due to the defect of ATP7A. Two suffered from Menkes disease (MD) and one from occipital horn syndrome. Disulfiram was orally given, in addition to a parenteral administration of copper-histidine in the case of MD patients. Serum levels of copper and ceruloplasmin slightly increased in one MD patient, and he showed favorable emotional expression and behavior more often than before according to his caretakers. However, no obvious changes were observed in the other two patients. Serum ratios of noradrenaline to dopamine, and adrenaline to dopamine, which are thought to be the indicators of dopamine β-hydroxylase activity, one of the copper requiring enzymes, were unaltered after disulfiram treatment. No adverse effects were recognized during the treatment period in all patients. Although the major improvement was not observed clinically or biochemically by disulfiram treatment so far, the trial will be continued to see the possible effects in these disorders with copper transport defect.
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Chiba N, Takenaka K, Nagata K, Ogawa E, Miyake M. [Lung cancer accompanied by active pulmonary tuberculosis]. KYOBU GEKA. THE JAPANESE JOURNAL OF THORACIC SURGERY 2012; 65:401-404. [PMID: 22569500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We report 2 patients with lung cancer accompanied by active pulmonary tuberculosis. Case1 was a 82-year-old woman with stage I A bronchioloalveolar carcinoma and tuberculosis in right upper lobe. Right upper lobectomy was performed after the histological diagnosis of lung cancer by intraoperative frozen section. Case2 was a 69-year-old man with papillary adenocarcinoma in right lower lobe and tuberculosis in bilateral upper lobe. Partial resection in right lower lobe was performed for diagnosis of lung cancer. Smear-positive tuberculosis was diagnosed by sputum examination after the operation. Post-operative anti-tuberculosis chemotherapy was added in both patients.
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Furusyo N, Murata M, Ogawa E, Toyoda K, Ihara T, Ikezaki H, Hayashi T, Koga T, Kainuma M, Hayashi J. Ribavirin concentration in the later stages of 48 week pegylated interferon- 2b plus ribavirin therapy for chronic hepatitis C is useful for predicting virological response. J Antimicrob Chemother 2011; 66:1127-1139. [DOI: 10.1093/jac/dkr034] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/30/2023] Open
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Kishi M, Ohta K, Ohta M, Tateno F, Ogawa E, Sakakibara R. P34-23 Mepps amplitude depression and recovery in passive transfer model of MuSK antibody positive MG Experimental model of simple plasma exchange therapy. Clin Neurophysiol 2010. [DOI: 10.1016/s1388-2457(10)61267-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Ikehata H, Okuyama R, Ogawa E, Nakamura S, Usami A, Mori T, Tanaka K, Aiba S, Ono T. Influences of p53 deficiency on the apoptotic response, DNA damage removal and mutagenesis in UVB-exposed mouse skin. Mutagenesis 2010; 25:397-405. [DOI: 10.1093/mutage/geq019] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
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Katsumata N, Ogawa E, Fujiwara I, Fujikura K. Novel CYP17A1 mutation in a Japanese patient with combined 17alpha-hydroxylase/17,20-lyase deficiency. Metabolism 2010; 59:275-8. [PMID: 19793597 DOI: 10.1016/j.metabol.2009.07.024] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/11/2009] [Revised: 07/10/2009] [Accepted: 07/27/2009] [Indexed: 11/16/2022]
Abstract
Combined 17alpha-hydroxylase/17,20-lyase deficiency is caused by a defect of P450c17 that catalyzes both 17alpha-hydroxylase and 17,20-lyase reactions in adrenal glands and gonads. In the present study, we analyzed the CYP17A1 gene in a Japanese girl with 17alpha-hydroxylase/17,20-lyase deficiency. The patient was referred to us for clitoromegaly at the age of 3 years. The karyotype was 46,XY. The patient was diagnosed as having 17alpha-hydroxylase/17,20-lyase deficiency based on the clinical and laboratory findings. Analysis of the CYP17A1 gene revealed a compound heterozygous mutation. One mutation was a deletion of codon 53 or 54 encoding Phe (TTC) in exon 1 (DeltaF54) on a maternal allele, which has been previously shown to partially abolish both 17alpha-hydroxylase and 17,20-lyase activities. The other was a novel missense mutation resulting in a substitution of Asn (AAC) for His (CAC) at codon 373 in exon 6 (H373N) on a paternal allele. Functional expression study demonstrated that the H373N mutation almost completely eliminates enzymatic activity. Previous studies have demonstrated that replacement of histidine by leucine at position 373 causes complete loss of both 17alpha-hydroxylase and 17,20-lyase activities with a defect in heme binding due to a global alteration of P450c17 structure, indicating the importance of H373 for P450c17 structure and function. Together, these results indicate that the patient is a compound heterozygote for the DeltaF54 and H383N mutations and that these mutations inactivate both 17alpha-hydroxylase and 17,20-lyase activities and give rise to clinically manifest combined 17alpha-hydroxylase/17,20-lyase deficiency.
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Ogawa E, Sakakibara R, Kishi M, Shirai K. Exercise-induced hypertension in pure autonomic failure. Eur J Neurol 2009; 16:e151-2. [DOI: 10.1111/j.1468-1331.2009.02719.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Ohta M, Okuyama R, Ogawa E, Kisu K, Sato H, Aoki M, Aiba S. Cutaneous accumulation of abnormal polyglutamine proteins of patients with dentatorubral-pallidoluysian atrophy. Eur J Neurol 2009; 16:1246-9. [PMID: 19469833 DOI: 10.1111/j.1468-1331.2009.02658.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND AND PURPOSE Dentatorubral-pallidoluysian atrophy (DRPLA) is a hereditary spinocerebellar degeneration caused by expansion of a trinucleotide CAG repeat encoding a polyglutamine tract in a disease protein atrophin-1. The clinical features include ataxia, choreoathetosis, and dementia, which result from neural degeneration caused by the mutant atrophin-1. METHODS We performed skin biopsy in two patients with DRPLA. RESULTS We found multiple clear cells in the epidermis, which were positive for proteins containing an expanded polyglutamine stretches. The clear cells were p63 (+), S-100 (-), and cytokeratin 20 (-), showing that they were keratinocytes. Negative or weak signals of pan-cytokeratin were consistent with the finding of decreased tonofilaments at the electron microscopic level. CONCLUSIONS The presence of clear keratincoytes showed that the mutant proteins interfered in cellular functions not only in neural cells but also in keratinocytes. The skin is accessible by biopsy, making it important in the diagnosis. Furthermore, the polyglutamine staining in the skin may be useful for evaluation of therapeutic modalities for DRPLA and other polyglutamine diseases.
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