1
|
Okada S, Morimoto T, Ogawa H, Sakuma M, Matsumoto C, Soejima H, Nakayama M, Doi N, Jinnouchi H, Waki M, Masuda I, Saito Y, Miwa K, Akahoshi K, Misumi K, Araki H, Mitsudo Y, Kondo N, Ashihara K, Yumoto S, Horimoto M, Doi O, Doijiri K, Fukami R, Shimabukuro M, Egusa G, Goto K, Hanaoka Y, Kimura Y, Haraguchi Y, Haraguchi O, Hasegawa A, Shioya Y, Shioya Y, Tanaka E, Yamada K, Atsumi T, Tanazawa S, Horio Y, Ichihara S, Yasuda I, Ikeda T, Ikemura M, Imamoto C, Iseri Y, Iwai K, Okamoto S, Sugiyama S, Kamura M, Kan H, Kiyota M, Kawamura K, Ono T, Koga T, Kinuwaki E, Naito H, Kozuma K, Kudou K, Morikami Y, Yasue H, Mizuno Y, Fujimoto H, Matsuyama K, Fujii H, Kamijikkoku S, Kuwahara T, Takaoka K, Machii K, Maeda K, Mahara K, Maki A, Manda N, Marutsuka K, Sameshima N, Gi T, Matsunaga T, Matsuo S, Okubo H, Minagawa F, Minoda K, Miyata J, Matsuo T, Momosaki S, Munakata T, Nakamura T, Nagano H, Goshi K, Sugimoto K, Naomi S, Nasu T, Tanaka H, Sonoda R, Kajiwara K, Odo T, Ogata H, Ogihara M, Ogura T, Oka K, Kawashima E, Oshima E, Ozaki K, Ozawa S, Shono H, Sakamoto Y, Sakurai N, Wakabayashi C, Sawada T, Shibata J, Shimono H, Iemura A, Matsutani A, Suefuji H, Sugiyama H, Hokamaki J, Komori K, Kinoshita Y, Murakami H, Hashiguchi J, Hashiguchi Y, Sawai K, Hifumi A, Seo K, Toihata M, Tokube K, Ogawa H, Tomita F, Taguchi M, Tsubokura T, Tsuchiya T, Tsuda K, Tsurusaki R, Obata K, Watanabe K, Hayasida R, Ishibashi Y, Osamura Y, Yamanaka Y, Sonoda K, Iwaoka T, Yokota H, Yoshinari M, Abe N, Ando N, Bando H, Takami T, Doi M, Fujii Y, Fukuda M, Fukuoka Y, Hamano M, Takaoka M, Hasegawa H, Yabuta I, Higami K, Higami S, Yasuno A, Fujinaga Y, Onishi Y, Yoshimura K, Minami S, Nakashima T, Horie H, Horii K, Matsumura N, Ikuno T, Katsuyama Y, Uemura S, Kikukawa M, Kanauchi M, Kuzuya H, Iwasaki A, Koutani T, Makino H, Miki H, Misugi S, Naito M, Naito M, Nakano Y, Nakatani A, Nakatani F, Horii M, Yabuta M, Seno A, Kawata H, Samejima K, Onoue K, Kawakami R, Nakano T, Ueda T, Soeda T, Kita Y, Inoue F, Yamano S, Iwama H, Sakan H, Suzuki M, Kagoshima T, Nakai T, Hashimoto T, Nishitani Y, Kobayashi Y, Hoda K, Fujiki K, Uejima J, Morikawa Y, Kawano T, Yamada H, Nishimoto K, Ohsumi K, Ote N, Oya A, Nishiura K, Masuda J, Ban K, Kyoda Y, Sawada I, Sawada Y, Okada K, Yazaki A, Hanatani M, Sutani T, Hiramori Y, Tanaka Y, Igaki T, Tomioka Y, Shiiki H, Sugihara K, Hayashi M, Sasaki Y, Matsukura Y, Ueda M, Ueyama M, Uyama H, Yamada H, Yamaga K, Nakajima T, Yoshimoto K, Yoshimura M. Effect of Aspirin on Cancer Chemoprevention in Japanese Patients With Type 2 Diabetes: 10-Year Observational Follow-up of a Randomized Controlled Trial. Diabetes Care 2018; 41:1757-1764. [PMID: 29909377 DOI: 10.2337/dc18-0368] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [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] [Received: 02/19/2018] [Accepted: 05/07/2018] [Indexed: 02/03/2023]
Abstract
OBJECTIVE This study analyzed the efficacy of low-dose aspirin in cancer chemoprevention in patients with diabetes. RESEARCH DESIGN AND METHODS This study was a posttrial follow-up of the Japanese Primary Prevention of Atherosclerosis with Aspirin for Diabetes (JPAD) trial. Participants in the JPAD trial (2,536 Japanese patients with type 2 diabetes and without preexisting cardiovascular disease) were randomly allocated to receive aspirin (81 or 100 mg daily) or no aspirin. After that trial ended in 2008, we followed up with the participants until 2015, with no attempt to change the previously assigned therapy. The primary end point was total cancer incidence. We investigated the effect of low-dose aspirin on cancer incidence. RESULTS During the median follow-up period of 10.7 years, a total of 318 cancers occurred. The cancer incidence was not significantly different between the aspirin and no-aspirin groups (log-rank, P = 0.4; hazard ratio [HR], 0.92; 95% CI, 0.73-1.14; P = 0.4). In subgroup analyses, aspirin did not affect cancer incidence in men, women, or participants aged ≥65 years. However, it decreased cancer incidence in participants aged <65 years (log-rank, P = 0.05; HR, 0.67; 95% CI, 0.44-0.99; P = 0.048). After adjusting for sex, hemoglobin A1c, smoking status, and administration of metformin and statins, aspirin significantly reduced cancer incidence in participants aged <65 years (adjusted HR, 0.66; 95% CI, 0.43-0.99; P = 0.04). CONCLUSIONS Low-dose aspirin did not reduce cancer incidence in Japanese patients with type 2 diabetes.
Collapse
Affiliation(s)
- Sadanori Okada
- Department of Diabetology, Nara Medical University, Kashihara, Nara, Japan
- Department of Cardiovascular Medicine, Nara Medical University, Kashihara, Nara, Japan
| | - Takeshi Morimoto
- Department of Clinical Epidemiology, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan
| | - Hisao Ogawa
- National Cerebral and Cardiovascular Center, Osaka, Japan
| | - Mio Sakuma
- Department of Clinical Epidemiology, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan
| | - Chisa Matsumoto
- Department of Clinical Epidemiology, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan
| | - Hirofumi Soejima
- Department of Cardiology, Graduate School of Medical Science, Kumamoto University, Chuo, Kumamoto, Japan
| | | | - Naofumi Doi
- Department of Cardiovascular Medicine, Nara Prefectural Seiwa Medical Center, Sango, Ikoma, Nara, Japan
| | - Hideaki Jinnouchi
- Department of Internal Medicine, Jinnouchi Hospital Diabetes Care Center, Chuo, Kumamoto, Japan
| | - Masako Waki
- Department of Internal Medicine, Shizuoka City Shizuoka Hospital, Aoi, Shizuoka, Japan
| | - Izuru Masuda
- Medical Examination Center, Takeda Hospital, Shimogyo, Kyoto, Japan
| | - Yoshihiko Saito
- Department of Cardiovascular Medicine, Nara Medical University, Kashihara, Nara, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
2
|
Morita D, Hirabayashi K, Katsuyama Y, Morokawa H, Motobayashi M, Kurata T, Shigemura T, Tanaka M, Inaba Y, Koike K, Nakazawa Y. Viral load and ganciclovir (GCV) concentration in cerebrospinal fluid of patients successfully treated with GCV or valGCV for human herpesvirus 6 encephalitis/myelitis following umbilical cord blood transplantation. Transpl Infect Dis 2016; 18:773-776. [PMID: 27459097 DOI: 10.1111/tid.12579] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2016] [Revised: 03/23/2016] [Accepted: 05/10/2016] [Indexed: 11/26/2022]
Abstract
We describe successful treatment of 3 cases of human herpesvirus 6 (HHV-6) encephalitis/myelitis following cord blood transplantation (CBT). Ganciclovir (GCV) (10 mg/kg/day) reduced HHV-6 load to undetectable levels in cerebrospinal fluid (CSF). Early dose reduction in the presence of HHV-6 detectable in CSF resulted in an increased HHV-6 load. GCV was capably shifted to valganciclovir (VGCV) with an almost equivalent concentration. GCV/VGCV may be effective for HHV-6 encephalitis/myelitis after CBT, although HHV-6 load in CSF should be monitored.
Collapse
Affiliation(s)
- D Morita
- Department of Pediatrics, Shinshu University School of Medicine, Matsumoto, Japan
| | - K Hirabayashi
- Department of Pediatrics, Shinshu University School of Medicine, Matsumoto, Japan
| | - Y Katsuyama
- Department of Pharmacy, Shinshu University Hospital, Matsumoto, Japan
| | - H Morokawa
- Department of Pediatrics, Shinshu University School of Medicine, Matsumoto, Japan
| | - M Motobayashi
- Department of Pediatrics, Shinshu University School of Medicine, Matsumoto, Japan
| | - T Kurata
- Department of Pediatrics, Shinshu University School of Medicine, Matsumoto, Japan
| | - T Shigemura
- Department of Pediatrics, Shinshu University School of Medicine, Matsumoto, Japan
| | - M Tanaka
- Department of Pediatrics, Shinshu University School of Medicine, Matsumoto, Japan
| | - Y Inaba
- Department of Pediatrics, Shinshu University School of Medicine, Matsumoto, Japan
| | - K Koike
- Department of Pediatrics, Shinshu University School of Medicine, Matsumoto, Japan
| | - Y Nakazawa
- Department of Pediatrics, Shinshu University School of Medicine, Matsumoto, Japan.
| |
Collapse
|
3
|
Katsuyama Y, Taira N, Tsuboi T, Yoshioka M, Masaki H, Muraoka O. 3-O-Laurylglyceryl ascorbate reinforces skin barrier function through not only the reduction of oxidative stress but also the activation of ceramide synthesis. Int J Cosmet Sci 2016; 39:49-55. [PMID: 27261166 DOI: 10.1111/ics.12347] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Accepted: 06/02/2016] [Indexed: 12/23/2022]
Abstract
OBJECTIVE A higher trans-epidermal water loss (TEWL) occurs in rough skin, in elder skin and also in atopic dermatitis. An impaired skin barrier function is considered to be caused by an incomplete construction of the intercellular lamellar structure due to the quantitative reduction of ceramides. Since these symptoms coexist with oxidative stress, we hypothesized that impairment of the skin barrier function is accelerated by oxidative stress. Thus, the purpose of this study was to clarify the effect of oxidative stress on ceramide synthesis and to characterize whether antioxidants can improve skin barrier function. 3-O-Laurylglyceryl ascorbate (VC-3LG), which is a newly amphipathic derivative of ascorbic acid, was evaluated as a candidate antioxidant. METHODS We characterized the mRNA expression levels of serine palmitoyltransferase (SPT) in normal human epidermal keratinocytes (NHEKs) treated with H2 O2 using real-time PCR analysis. In order to evaluate the effect of VC-3LG on skin barrier function, we used several assays with reconstructed human epidermis equivalents (RHEEs). RESULTS Ceramide synthesis was down-regulated in NHEKs by oxidative stress. Treatment with VC-3LG abrogated the down-regulation of SPT mRNA in NHEKs caused by oxidative stress, and stimulated SPT mRNA expression levels. In experiments characterizing the antioxidative properties of VC-3LG, VC-3LG reduced oxidative stress in NHEKs by up-regulating catalase mRNA expression. In addition, VC-3LG stimulated the skin barrier function in RHEEs, which had lower TEWL values compared with untreated RHEEs. Furthermore, VC-3LG increased the quantity of ceramide in RHEEs. CONCLUSION Taken together, we conclude that VC-3LG reinforces the skin barrier function due to its reduction of oxidative stress and its promotion of ceramide synthesis.
Collapse
Affiliation(s)
- Y Katsuyama
- Seiwa Kasei Co Ltd, 1-2-14, Nunoichicho, Higashiosaka, Osaka, 579-8004, Japan
| | - N Taira
- Seiwa Kasei Co Ltd, 1-2-14, Nunoichicho, Higashiosaka, Osaka, 579-8004, Japan
| | - T Tsuboi
- Seiwa Kasei Co Ltd, 1-2-14, Nunoichicho, Higashiosaka, Osaka, 579-8004, Japan
| | - M Yoshioka
- Seiwa Kasei Co Ltd, 1-2-14, Nunoichicho, Higashiosaka, Osaka, 579-8004, Japan
| | - H Masaki
- School of Bioscience and Biotechnology, Tokyo University of Technology, 1404-1, Katakuracho, Hachiouji, Tokyo, 192-0982, Japan
| | - O Muraoka
- School of Pharmacy, Kinki University, 3-4-1, Kowakae, Higashiosaka, Osaka, 577-8502, Japan
| |
Collapse
|
4
|
Nozawa Y, Umemura T, Katsuyama Y, Shibata S, Kimura T, Morita S, Joshita S, Komatsu M, Matsumoto A, Yoshizawa K, Ota M, Tanaka E. Genetic polymorphism in IFNL4 and response to pegylated interferon-α and ribavirin in Japanese chronic hepatitis C patients. ACTA ACUST UNITED AC 2014; 83:45-8. [PMID: 24355007 DOI: 10.1111/tan.12264] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2013] [Revised: 09/18/2013] [Accepted: 11/12/2013] [Indexed: 01/18/2023]
Abstract
A genetic polymorphism of the newly discovered interferon-λ 4 (IFNL4) gene was associated with hepatitis C virus (HCV) clearance in individuals of African ancestry. To assess whether a dinucleotide variant of IFNL4 (ss469415590) also affected treatment outcome of antiviral therapy in Japan, we genotyped 213 patients with chronic genotype 1 HCV infection and 176 healthy subjects. The ΔG allele was associated with treatment failure [odds ratio (OR) 4.73, P = 0.019], as was the IFL3 rs8099917 single nucleotide polymorphism (SNP) (OR 5.06, P = 0.068). The correlation between ss469415590 and rs8099917 was high (r(2) = 0.92, D' = 0.98). Multivariate analysis revealed that the rs8099917 SNP was independently associated with treatment failure (OR 5.28, P = 0.009). Therefore, ss469415590 may be another predictive marker of antiviral therapy outcome in the Japanese population.
Collapse
Affiliation(s)
- Y Nozawa
- Department of Medicine, Division of Hepatology and Gastroenterology, Shinshu University School of Medicine, Matsumoto, Japan
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
5
|
Mita A, Ikegami T, Masuda Y, Katsuyama Y, Ohno Y, Urata K, Nakazawa Y, Kobayashi A, Miyagawa S. Optimal Initial Dose of Orally Administered Once-daily Extended-release Tacrolimus Following Intravenous Tacrolimus Therapy After Liver Transplantation. Transplant Proc 2014; 46:794-6. [DOI: 10.1016/j.transproceed.2014.01.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2013] [Revised: 12/27/2013] [Accepted: 01/13/2014] [Indexed: 11/26/2022]
|
6
|
Yoshikawa K, Nakazawa Y, Katsuyama Y, Hirabayashi K, Saito S, Shigemura T, Tanaka M, Yanagisawa R, Sakashita K, Koike K. Safety, tolerability, and feasibility of antifungal prophylaxis with micafungin at 2 mg/kg daily in pediatric patients undergoing allogeneic hematopoietic stem cell transplantation. Infection 2014; 42:639-47. [DOI: 10.1007/s15010-014-0601-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2013] [Accepted: 02/10/2014] [Indexed: 11/28/2022]
|
7
|
Hirabayashi K, Nakazawa Y, Katsuyama Y, Yanagisawa T, Saito S, Yoshikawa K, Shigemura T, Sakashita K, Ichikawa M, Koike K. Successful ganciclovir therapy in a patient with human herpesvirus-6 encephalitis after unrelated cord blood transplantation: usefulness of longitudinal measurements of viral load in cerebrospinal fluid. Infection 2012; 41:219-23. [DOI: 10.1007/s15010-012-0329-3] [Citation(s) in RCA: 12] [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] [Received: 06/05/2012] [Accepted: 08/28/2012] [Indexed: 11/28/2022]
|
8
|
Shiina T, Suzuki S, Ozaki Y, Taira H, Kikkawa E, Shigenari A, Oka A, Umemura T, Joshita S, Takahashi O, Hayashi Y, Paumen M, Katsuyama Y, Mitsunaga S, Ota M, Kulski JK, Inoko H. Super high resolution for single molecule-sequence-based typing of classical HLA loci at the 8-digit level using next generation sequencers. ACTA ACUST UNITED AC 2012; 80:305-16. [PMID: 22861646 DOI: 10.1111/j.1399-0039.2012.01941.x] [Citation(s) in RCA: 120] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2012] [Accepted: 07/03/2012] [Indexed: 01/06/2023]
Abstract
Current human leukocyte antigen (HLA) DNA typing methods such as the sequence-based typing (SBT) and sequence-specific oligonucleotide (SSO) methods generally yield ambiguous typing results because of oligonucleotide probe design limitations or phase ambiguity for HLA allele assignment. Here we describe the development and application of the super high-resolution single-molecule sequence-based typing (SS-SBT) of HLA loci at the 8-digit level using next generation sequencing (NGS). NGS which can determine an HLA allele sequence derived from a single DNA molecule is expected to solve the phase ambiguity problem. Eight classical HLA loci-specific polymerase chain reaction (PCR) primers were designed to amplify the entire gene sequences from the enhancer-promoter region to the 3' untranslated region. Phase ambiguities of HLA-A, -B, -C, -DRB1 and -DQB1 were completely resolved and unequivocally assigned without ambiguity to single HLA alleles. Therefore, the SS-SBT method described here is a superior and effective HLA DNA typing method to efficiently detect new HLA alleles and null alleles without ambiguity.
Collapse
Affiliation(s)
- T Shiina
- Division of Basic Medical Science and Molecular Medicine, Department of Molecular Life Science, Tokai University School of Medicine, Isehara, Kanagawa, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
9
|
Yanagisawa R, Katsuyama Y, Shigemura T, Saito S, Tanaka M, Nakazawa Y, Sakashita K, Shiohara M, Koike K. Engraftment syndrome, but not acute GVHD, younger age, CYP3A5 or MDR1 polymorphisms, increases tacrolimus clearance in pediatric hematopoietic SCT. Bone Marrow Transplant 2010; 46:90-7. [DOI: 10.1038/bmt.2010.64] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
10
|
Horie Y, Meguro A, Ota M, Kitaichi N, Katsuyama Y, Takemoto Y, Namba K, Yoshida K, Song YW, Park KS, Lee EB, Inoko H, Mizuki N, Ohno S. Association of TLR4 polymorphisms with Behcet's disease in a Korean population. Rheumatology (Oxford) 2009; 48:638-42. [DOI: 10.1093/rheumatology/kep077] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
|
11
|
Akiyama M, Yatsu K, Ota M, Katsuyama Y, Kashiwagi K, Mabuchi F, Iijima H, Kawase K, Yamamoto T, Nakamura M, Negi A, Sagara T, Kumagai N, Nishida T, Inatani M, Tanihara H, Ohno S, Inoko H, Mizuki N. Microsatellite analysis of the GLC1B locus on chromosome 2 points to NCK2 as a new candidate gene for normal tension glaucoma. Br J Ophthalmol 2008; 92:1293-6. [DOI: 10.1136/bjo.2008.139980] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
12
|
Ito A, Ota M, Katsuyama Y, Inoko H, Ohno S, Mizuki N. Lack of association of Toll-like receptor 9 gene polymorphism with Beh�et?s disease in Japanese patients. ACTA ACUST UNITED AC 2007; 70:423-6. [PMID: 17854429 DOI: 10.1111/j.1399-0039.2007.00924.x] [Citation(s) in RCA: 12] [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] [Indexed: 11/30/2022]
Abstract
Toll-like receptors (TLRs) play an important role in the induction of defense mechanisms of the innate and adaptive immune responses to microbial pathogens. Genetic polymorphisms within the TLR9 gene have been reported to be associated with a variety of inflammatory and infectious diseases. Behçet's disease (BD) is a chronic inflammatory disease, and the etiology of BD has yet to be fully elucidated. We investigated the potential association of the TLR9 gene with susceptibility to BD by analyzing the frequency of nine single nucleotide polymorphisms (SNPs) in a population of 200 Japanese BD patients and 102 randomized controls. Our results showed that SNPs in the TLR9 gene were not significantly associated with susceptibility to BD.
Collapse
Affiliation(s)
- A Ito
- Department of Ophthalmology, Yokohama City University School of Medicine, Yokohama, Kanagawa, Japan
| | | | | | | | | | | |
Collapse
|
13
|
Meguro A, Ota M, Katsuyama Y, Oka A, Ohno S, Inoko H, Mizuki N. Association of the toll-like receptor 4 gene polymorphisms with Behcet's disease. Ann Rheum Dis 2007; 67:725-7. [DOI: 10.1136/ard.2007.079871] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
|
14
|
Malacrida S, Katsuyama Y, Droma Y, Basnyat B, Angelini C, Ota M, Danieli GA. Association between human polymorphic DNA markers and hypoxia adaptation in Sherpa detected by a preliminary genome scan. Ann Hum Genet 2007; 71:630-8. [PMID: 17359493 DOI: 10.1111/j.1469-1809.2007.00358.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Genetic determinants of resistance to hypobaric hypoxia in the Sherpa are still unknown. Since adaptive gene variants must still be subjected to positive selection, linkage disequilibrium between such variants and specific alleles of flanking DNA markers is expected. Following this line of reasoning, we performed a human genome scan using 998 polymorphic DNA markers in 7 unrelated Sherpa porters living in the Solu-Khumbu area. This minimalist approach succeeded in detecting 8 DNA markers showing homozygosity for the same shared allele. Analysis of additional DNA samples from 2 more Sherpa porters focused our attention on three polymorphic DNA markers (D6S1697, D14S274, D17S1795) showing homozygosity for the same shared allele in 8 out 9 tested individuals. Analysis of DNA samples from Sherpa and non-Sherpa populations of Nepal proved HW equilibrium in both populations for markers D14S274 and D17S1795, while an excess of heterozygotes was observed in the Sherpa population for marker D6S1697. A significant difference in allele frequencies for D14S274 and D17S1795 between the two populations was observed. These findings exclude the possibility that homozygosity for 3 specific loci in 8 unrelated individuals might be ascribed to inbreeding or recent genetic drift. We therefore conclude that the chromosomal segments detected by such DNA markers may include genes involved in adaptation to hypobaric hypoxia.
Collapse
Affiliation(s)
- S Malacrida
- Department of Biology, University of Padua, Italy.
| | | | | | | | | | | | | |
Collapse
|
15
|
Umemura T, Ota M, Hamano H, Katsuyama Y, Kiyosawa K, Kawa S. Genetic association of Fc receptor-like 3 polymorphisms with autoimmune pancreatitis in Japanese patients. Gut 2006; 55:1367-8. [PMID: 16905709 PMCID: PMC1860039 DOI: 10.1136/gut.2006.095059] [Citation(s) in RCA: 105] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
|
16
|
Nagasaki T, Watanabe F, Katsuyama Y, Hamada Y, Ohtani M, Narisada M. Synthesis of [14C]- and [3H]-labelled (+)-[1R-[1α,2α(Z),3β,4α]]-7-[3-[(Phenylsulfonyl)AMINO]BICYCLO[2.2.1]HEPT-2-YL]-5-HEPTENOIC ACID, ((+)-S-145) AND ITS CALCIUM SALT (S-1452). J Labelled Comp Radiopharm 2006. [DOI: 10.1002/jlcr.2580310105] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
17
|
Seo S, Nagasaki T, Katsuyama Y, Matsubara F, Sakata T, Yoshioka M, Makisumi Y. Synthesis of (22R,23R)- and (22S,23S)-[4-14C]-24-EPIBRASSINOLIDE. J Labelled Comp Radiopharm 2006. [DOI: 10.1002/jlcr.2580271205] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
18
|
Nagasaki T, Katsuyama Y, Minato H. Syntheses of radioactive and stable isotope-labelled 1-ethyl-6,7-methylenedioxy-4(1h)-oxocinnoline-3-carboxylic acids (cinoxacin). J Labelled Comp Radiopharm 2006. [DOI: 10.1002/jlcr.2580120311] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
19
|
Minato H, Katsuyama Y, Nagasaki T. Synthesis of 6-chloro-9-[(4-(ethlethyl-1-14C-amino)-1-methylbutyl)amino]-2-methoxyacridine. J Labelled Comp Radiopharm 2006. [DOI: 10.1002/jlcr.2580130408] [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: 11/07/2022]
|
20
|
Minato H, Nagasaki T, Katsuyama Y, Yokoshima T, Suga K, Ueda T. Synthesis of some 14C-labelled aziridine compounds, psychotropic agents. J Labelled Comp Radiopharm 2006. [DOI: 10.1002/jlcr.2580130110] [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: 11/06/2022]
|
21
|
Minato H, Katsuyama Y, Nagasaki T, Irisawa J, Igarashi K. Synthesis of 14C-labelled showdomycin, 3-(β-D-ribofuranosyl)-3-pyrroline-2,5-dione-5-14C. J Labelled Comp Radiopharm 2006. [DOI: 10.1002/jlcr.2580140320] [Citation(s) in RCA: 2] [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: 11/11/2022]
|
22
|
Shichi D, Kikkawa EF, Ota M, Katsuyama Y, Kimura A, Matsumori A, Kulski JK, Naruse TK, Inoko H. The haplotype block, NFKBIL1-ATP6V1G2-BAT1-MICB-MICA, within the class III-class I boundary region of the human major histocompatibility complex may control susceptibility to hepatitis C virus-associated dilated cardiomyopathy. ACTA ACUST UNITED AC 2005; 66:200-8. [PMID: 16101831 DOI: 10.1111/j.1399-0039.2005.00457.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Cardiomyopathy is a heart muscle disease with impaired stretch response that can result in severe heart failure and sudden death. A small proportion of hepatitis C virus (HCV)-infected patients may be predisposed to develop dilated cardiomyopathy (DCM) and hypertrophic cardiomyopathy (HCM). The molecular mechanisms involved in the predisposition remain unknown due in part to the lack of information on their genetic background. Because the human leukocyte antigen (HLA) region has a pivotal role in controlling the susceptibility to HCV-induced liver disease, we hypothesized that particular HLA alleles and/or non-HLA gene alleles within the human major histocompatibility complex (MHC) genomic region might control the predisposition to HCV-associated DCM (HCV-DCM) and/or HCV-associated HCM (HCV-HCM). Here, we present mapping results of the MHC-related susceptibility gene locus for HCV-associated cardiomyopathy by analyzing microsatellite and single nucleotide polymorphism markers. To delineate the susceptibility locus, we genotyped 44 polymorphic markers scattered across the entire MHC region in a total of 59 patients (21 HCV-DCM and 38 HCV-HCM) and 120 controls. We mapped HCV-DCM susceptibility to a non-HLA gene locus spanning from NFKBIL1 to MICA gene loci within the MHC class III-class I boundary region. Our results showed that HCV-DCM was more strongly associated with alleles of the non-HLA genes rather than the HLA genes themselves. In addition, no significant association was found between the MHC markers and HCV-HCM. This marked difference in the MHC-related disease susceptibility for HCV- associated cardiomyopathy strongly suggests that the development of HCV- DCM and HCV-HCM is under the control of different pathogenic mechanisms.
Collapse
Affiliation(s)
- D Shichi
- Department of Basic Medical Science and Molecular Medicine, Tokai University School of Medicine, Isehara, Kanagawa, Japan
| | | | | | | | | | | | | | | | | |
Collapse
|
23
|
Li S, Kawata H, Katsuyama Y, Ota M, Morishima Y, Mano S, Kulski JK, Naruse T, Inoko H. Association of polymorphic MHC microsatellites with GVHD, survival, and leukemia relapse in unrelated hematopoietic stem cell transplant donor/recipient pairs matched at five HLA loci. ACTA ACUST UNITED AC 2004; 63:362-8. [PMID: 15009808 DOI: 10.1111/j.0001-2815.2004.00200.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
In order to determine whether matching/mismatching for microsatellite polymorphism provides useful information on acute graft-vs-host disease (GVHD), survival, and leukemia relapse in hematopoietic stem cell (HSC) transplantation, we genotyped for polymorphisms at 13 microsatellite loci within the major histocompatibility complex (MHC) of 100 unrelated HSC transplant donor-recipient pairs who were matched at five classical human leukocyte antigen (HLA) loci. A high percentage of allele matching was obtained for five microsatellite loci, DQCARII (96%), MICA (93%), MIB (89%), C1-3-1 (93%), and D6S510 (97%), that are localized within 100 kb of the HLA-DR, HLA-DQ, HLA-B, HLA-C, or HLA-A locus. In contrast, the other eight microsatellites are located farther away from the HLA classical loci and have much lower percentages of allele matching [e.g. tumor necrosis factor a (TNFa) (73%), TNFd (74%), D6S273 (64%), C3-2-11 (46%), C5-3-1 (50%), C5-4-5 (63%), C5-2-7 (68%), and D6S265 (81%)]. Therefore, there were at least eight microsatellite markers with relatively high percentages of mismatches in the donor/recipient pairs with acute or chronic GVHD, poor graft survival, and leukemia relapse. However, there were no statistically significant associations between mismatched donor-recipient pairs at the 13 microsatellite loci and acute or chronic GVHD, graft survival, and leukemia relapse. Nevertheless, allele matching at the microsatellite TNFd locus near the TNFa gene was found by the Fisher's exact double-sided test to be significantly associated with decreased survival in the grade III/IV acute GVHD group. Overall, these results suggest that the matching of microsatellite polymorphisms within the HLA region, especially the ones farthest from the classical HLA loci, was not useful indicator for the outcome of HSC transplantation from unrelated donors. In this regard, the future determination of the genome-wide microsatellite genotypes in HLA-matched donor-recipient pairs, outside the MHC, may be a better possibility for identifying minor histocompatibility genes in linkage disequilibria with microsatellites as potential predictive markers for the occurrence of acute GVHD and survival rate in HSC transplantation.
Collapse
Affiliation(s)
- S Li
- Department of Molecular Life Science, Division of Basic Science and Molecular Medicine, Tokai University School of Medicine, Isehara, Kanagawa 259-1193, Japan
| | | | | | | | | | | | | | | | | |
Collapse
|
24
|
Ogino S, Hashikura Y, Katsuyama Y, Ikegami T, Nakazawa Y, Urata K, Terada M, Miyagawa S, Kawasaki S. Conversion from tacrolimus to cyclosporine microemulsion therapy in liver transplant recipients. Transplant Proc 2004; 36:299S-301S. [PMID: 15041357 DOI: 10.1016/j.transproceed.2003.12.037] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
The calcineurin inhibitors cyclosporine and tacrolimus have distinct advantages and drawbacks. Therefore it is important to tailor their use to the patient's tolerance. In some patients, the need to ameliorate the adverse effects of tacrolimus may necessitate a switch to cyclosporine-based therapy. Rescue therapy with a cyclosporine microemulsion (Neoral)-based regimen for transplant patients intolerant of tacrolimus has been evaluated to assess the best method of switching and determine the initial and maintenance doses of Neoral in children and adults. Our aims were to evaluate not only these facets, but also the pharmacokinetics of Neoral in stable patients, including target 2-hour postdose blood concentrations (C2) of cyclosporine in liver transplant recipients. Eighteen liver transplant patients switched from tacrolimus to Neoral underwent a program of cyclosporine blood level monitoring. The conversions were conducted safely; the incidence of acute rejection episodes was low (11.1%). Statistical analysis showed that the C2 correlated with the area under the time-blood concentration curve of cyclosporine for 0 to 4 hours after dosing (R=0.970). We determined the maintenance doses of Neoral for pediatric and adult patients as well as the feasibility of C2 quantitated monitoring in liver transplantation.
Collapse
Affiliation(s)
- S Ogino
- Division of Liver Transplantation, Department of Surgery, Shinshu University School of Medicine, Matsumoto, Japan
| | | | | | | | | | | | | | | | | |
Collapse
|
25
|
Mizuki N, Yabuki K, Ota M, Katsuyama Y, Ando H, Nomura E, Funakoshi K, Davatchi F, Chams H, Nikbin B, Ghaderi AA, Ohno S, Inoko H. Analysis of microsatellite polymorphism around the HLA-B locus in Iranian patients with Behçet's disease. Tissue Antigens 2002; 60:396-9. [PMID: 12492815 DOI: 10.1034/j.1399-0039.2002.600506.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
We have previously suggested that in a Japanese population the susceptible locus for Behçet's disease (BD) is HLA-B51 itself. To confirm this finding in another population, we performed HLA class I typing using the PCR-SSP method and analyzed eight polymorphic markers distributed within 1100 kb around the HLA-B gene using automated sequencer and subsequent automated fragment detection by fluorescent-based technology with the DNA samples of 84 Iranian patients with BD and 87 healthy ethnically matched controls. As a result, three microsatellite alleles (MICA-A6, MIB-348, C1-4-1-217) and HLA-B51 were found to be strongly associated with BD. Of these alleles HLA-B51 is the most strongly associated allele. There were no alleles that were increased in allele frequency at any microsatellite loci centromeric of MICA or telomeric of HLA-B51. Therefore, HLA-B51 was confirmed to be by far the most strongly associated gene with BD in an Iranian population.
Collapse
Affiliation(s)
- N Mizuki
- Department of Ophthalmology, Yokohama City University School of Medicine, Kanagawa, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
26
|
Matsuzaka Y, Makino S, Okamoto K, Oka A, Tsujimura A, Matsumiya K, Takahara S, Okuyama A, Sada M, Gotoh R, Nakatani T, Ota M, Katsuyama Y, Tamiya G, Inoko H. Susceptibility locus for non-obstructive azoospermia is localized within the HLA-DR/DQ subregion: primary role of DQB1*0604. Tissue Antigens 2002; 60:53-63. [PMID: 12366783 DOI: 10.1034/j.1399-0039.2002.600107.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Non-obstructive azoospermia is a male infertility characterized by no or little sperm in semen as a result of a congenital dysfunction in spermatogenesis. Previous studies have reported a higher prevalence of particular human leukocyte antigen (HLA) antigens in non-obstructive azoospermia. As the expression of the RING3 gene located in the HLA class II region was predominant in the testis, mainly around spermatids and pachytene spermatocytes, it is tempting to speculate that RING3 is one of the strong candidate genes responsible for the pathogenesis of the disease. In this study, the genetic polymorphism in the RING3 gene was investigated by the direct sequencing technique. As a result, a total of 14 single nucleotide polymorphisms were identified. Among them, six were localized in the coding region but none of them was accompanied by an amino-acid substitution. No significant difference in the allelic distribution at these 14 polymorphic sites was observed between the patients and healthy controls, suggesting that the susceptible gene for non-obstructive azoospermia is not the RING3 gene. Then, in order to map the susceptibility locus for non-obstructive azoospermia precisely within the HLA region, 11 polymorphic microsatellite markers distributed from the SACM2L gene just outside the HLA class II region (187 kb telomeric of the DPB1 gene) to the OTF3 gene in the HLA class I region were subjected to association analysis in the patients. Statistical analysis of distribution in the allelic frequency at each microsatellite locus demonstrated that the pathogenic gene for non-obstructive azoospermia is located within the HLA-DR/DQ subregion. In fact, DRB1*1302 and DQB1*0604 were found to be strongly associated with non-obstructive azoospermia by polymerase chain reaction-based DNA typing. Further, haplotype analysis suggested that the DQB1*0604 allele may play a decisive role in the pathogenesis of non-obstructive azoospermia.
Collapse
Affiliation(s)
- Y Matsuzaka
- Department of Molecular life Science, Tokai University School of Medicine, Ishehara, Kanagwa, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
27
|
Murata Y, Okado H, Katsuyama Y, Okamura Y, Kubo Y. Primary structure, developmental expression and functional properties of an inward rectifier K+ channel of the tunicate. RECEPTORS & CHANNELS 2002; 7:387-99. [PMID: 11697081] [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: 02/22/2023]
Abstract
A cDNA encoding for a tunicate inward rectifier K+ channel (TuIRK) was isolated. TuIRK exhibited the highest similarity (approximately 50%) with mammalian Kir2 (IRK) subfamily. Maternal RNA of TuIRK was detected by RT-PCR in unfertilized eggs. By in situ hybridization, the transcript was observed at the 32-cell stage, restricted at the 64-cell stage in anterior epidermal cells of a4-2 blastomere lineage, and disappeared at the late gastrula stage. Therefore, TuIRK was identified to be the inward rectifier whose expression was previously reported to change dramatically upon the neural/epidermal cell fate selection. In Xenopus oocytes, TuIRK expressed a strongly inward rectifying K+ current. The basic electrophysiological properties of TuIRK were similar to those of the mouse IRK1 (mIRK1), except that the sensitivity to the block by extracellular Mg2+ was much lower than that of mIRK1. To identify the structural determinant, we made mutants of the pore region, and then of the extracellular loop (N226 of TuIRK, and E125 of mIRK1). In E125N mutant of mIRK1, the sensitivity to the Mg2+ block was decreased significantly, whereas N226E of TuIRK1 did not acquire the sensitivity. These results demonstrate the contribution of this site to the Mg2+ block and the presence of additional determinant(s).
Collapse
Affiliation(s)
- Y Murata
- Department of Physiology, Tokyo Medical and Dental University, Graduate School and Faculty of Medicine, D-566, Yushima 1-5-45, Bunkyo, Tokyo 113-8519, Japan
| | | | | | | | | |
Collapse
|
28
|
Mizuki N, Ota M, Katsuyama Y, Yabuki K, Ando H, Shiina T, Palimeris GD, Kaklamani E, Ito D, Ohno S, Inoko H. Sequencing-based typing of HLA-B*51 alleles and the significant association of HLA-B*5101 and -B*5108 with Behçet's disease in Greek patients. Tissue Antigens 2002; 59:118-21. [PMID: 12028538 DOI: 10.1034/j.1399-0039.2002.590207.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Behçet's disease (BD) is widely known to be strongly associated with human leukocyte antigen (HLA) B51 in many different ethnic groups.Recently, HLA-B51 allele typing of Greek BD patients was performed to study the distribution of B*5101-B*5107 alleles in this Greek population, the B51 antigen strongly associated with BD was found to be predominantly encoded by allele B*5101. As it is now known that the B51 antigen can be encoded by 21 alleles, B*5101-B*5121, we performed HLA-B*51 allele genotyping among 58 Greek patients with BD. After serological HLA typing, typing of HLA-B*51 alleles was performed using the polymerase chain reaction-sequencing-based typing (PCR-SBT) method. The frequency of the B51 antigen was found to be significantly higher in the patient group as compared with the control group (75.9% of patients vs 22.0% of controls. In the genotyping of B51 alleles, 34 out of 44 B51-positive patients possessed B*5101, 13 out of the 44 carried B*5108. In contrast, all of the 9 B51-positive normal controls carried B*5101. This study revealed a strong association between Greeks with BD, both B*5101, B*5108, provided important insights into the molecular mechanism underlying the association between HLA status, this disease.
Collapse
Affiliation(s)
- N Mizuki
- Department of Ophthalmology, Yokohama City University School of Medicine, Japan
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
29
|
Mizuki N, Ota M, Katsuyama Y, Yabuki K, Ando H, Shiina T, Nomura E, Onari K, Ohno S, Inoko H. HLA-B*51 allele analysis by the PCR-SBT method and a strong association of HLA-B*5101 with Japanese patients with Behçet's disease. Tissue Antigens 2001; 58:181-4. [PMID: 11703826 DOI: 10.1034/j.1399-0039.2001.580306.x] [Citation(s) in RCA: 44] [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] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Behçet's disease (BD) is known to be associated with human leukocyte antigen (HLA) B51 in many different ethnic groups. An increased incidence of HLA-B51 in the patient group has also been reported in a Japanese population. Recently, the B51 antigen has been identified to comprise 21 alleles, B*5101-B*5121. Further, not only HLA-B*5101 but also HLA-B*5108 were found to be relatively increased in the patient groups among Italian and Saudi Arabian populations. Therefore, we performed HLA-B*51 allele genotyping by the polymerase chain reaction-sequencing based typing (PCR-SBT) method in order to investigate whether there is any correlation of one particular B51-associated allele with Japanese BD. Ninety-six Japanese patients with BD and 132 healthy Japanese volunteers were enrolled in this study. As a result, the phenotype frequency of the B51 antigen was confirmed to be remarkably increased in the patient group as compared to the ethnically matched control group (59.4% in patients vs. 13.6% in controls; Pc=0.0000000000098, R.R.=9.3). In the B*51 allele genotyping, 56 out of 57 B51-positive patients were defined as B*5101 and the remaining one was B*5102. In contrast, all of 18 B51-positive normal controls were B*5101. None of the Japanese patients and healthy controls carried the HLA-B*5108 allele. This study revealed that B*51 allelic distribution in Japanese was different from those in Italian and Saudi Arabian populations, and that the significantly high incidence of the HLA-B51 antigen in the Japanese BD patient group was mostly caused by the significant increase of the HLA-B*5101 allele.
Collapse
Affiliation(s)
- N Mizuki
- Department of Ophthalmology, Yokohama City University School of Medicine, Kanazawa-ku, Yokohama, Kanagawa, Japan
| | | | | | | | | | | | | | | | | | | |
Collapse
|
30
|
Seki SS, Sugimura K, Ota M, Matsuzawa J, Katsuyama Y, Ishizuka K, Mochizuki T, Suzuki K, Yoneyama O, Mizuki N, Honma T, Inoko H, Asakura H. Stratification analysis of MICA triplet repeat polymorphisms and HLA antigens associated with ulcerative colitis in Japanese. Tissue Antigens 2001; 58:71-6. [PMID: 11696218 DOI: 10.1034/j.1399-0039.2001.580201.x] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
We previously reported a conserved haplotype of HLA B52-DR2 and a significantly high frequency of the major histocompatibility complex (MHC) class I chain-related gene A (MICA) transmembrane-short tandem repeat (TM-STR) 6 allele in Japanese patients with ulcerative colitis (UC). To examine the predominance of the MICA TM-STR 6 allele as a marker of the susceptibility to UC within the susceptible haplotype, the association of each allele with UC was estimated following stratification of the patients to control for any possible confounding effects of other alleles positively associated with UC. Sixty-four patients with UC and 236 unrelated healthy controls were included in this study. All subjects were Japanese. HLA-A, -B, -C, and -DR antigens were determined serologically. A triplet repeat polymorphism of the MICA was determined by direct sequencing. To control for the effect of linkage disequilibrium, Mantel-Haenszel weighed odds ratios were calculated. Significantly higher phenotype frequencies of B52, MICA TM-STR 6, and DR2 were observed in patients with UC. Linkage disequilibria among alleles associated with UC revealed that a B52 - MICA TM-STR 6 - DR2 haplotype was conserved in patients with UC, as in controls. When the association of HLA-B52 was estimated after patient stratification for the possible confounding effect of MICA TM-STR 6 or DR2, a strong significant association of B52 with UC was still observed. In contrast, no association with UC was observed for MICA TM-STR 6 or DR2, after stratification of the possible confounding effect of HLA-B52. These results imply that the significant increase in MICA TM-STR 6 in Japanese patients with UC is attributable to linkage disequilibrium with HLA-B52.
Collapse
Affiliation(s)
- S S Seki
- The 3rd Division, Department of Internal Medicine, Niigata University School of Medicine, Niigata, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
31
|
Ota M, Katsuyama Y, Liu C, Takayanagi K, Asamura H, Fukushima H. Allelic structure and distribution of two STR loci, D8S580 and D22S442, in the Japanese population. Forensic Sci Int 2001; 119:82-6. [PMID: 11348797 DOI: 10.1016/s0379-0738(00)00411-4] [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: 10/18/2022]
Abstract
The allelic frequency and structural characteristics of two STR loci D8S580 and D22S442 were investigated using blood samples from 143 unrelated healthy Japanese individuals. Thirty-eight alleles in D8S580 locus and 13 alleles in D22S442 locus were identified. The discrimination power, heterozygosity, and the polymorphic information content of those loci displayed high values (0.98, 0.88, and 0.87 in D8S580 and 0.97, 0.86 and 0.85 in D22S442), and their frequency distributions met Hardy-Weinberg equilibrium expectations. The allelic pattern of D8S580 was complex and differentiated into three groups (group I: alleles 184-194bp; group II: alleles 203-223, 235, 239, 243, 252 and 255bp; group III: alleles 227-286bp). Most of their alleles contained five categories of repeat units (A: aaaag; B: aaag; C: aagg; D: caag; E: agaa). On the other hand, D22S442 contained only two types of repeat units (A: agga; B: aggg). The present study, hence, proves that both D8S580 and D22S442 are highly polymorphic and represent stable genetic markers applicable to forensic investigations.
Collapse
Affiliation(s)
- M Ota
- Department of Legal Medicine, Shinshu University School of Medicine, Asahi 3-1-1, 390-8621, Matsumoto, Japan.
| | | | | | | | | | | |
Collapse
|
32
|
Okada T, MacIsaac SS, Katsuyama Y, Okamura Y, Meinertzhagen IA. Neuronal form in the central nervous system of the tadpole larva of the ascidian Ciona intestinalis. Biol Bull 2001; 200:252-256. [PMID: 11441967 DOI: 10.2307/1543506] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The dorsal tubular central nervous system (CNS) of the ascidian tadpole larva is a diagnostic feature by which the chordate affinities of this group, as a whole, are recognized. We have used two methods to identify larval neurons of Ciona intestinalis. The first is serial electron microscopy (EM), as part of a dedicated study of the visceral ganglion (1), and the second is the transient transfection of neural plate progeny with green fluorescent protein (GFP) (2), to visualize the soma and its neurites of individual neurons in whole-mounted larvae of C. intestinalis. Our observations reveal that ascidian larval neurons are simple inform, with a single axonal neurite arising from a soma that is either monopolar or has only very few, relatively simple neurites arising from it, as part of a presumed dendritic arbor. Somata in the visceral ganglion giving rise to axons descending in the caudal nerve cord are presumed to be those of motor neurons.
Collapse
Affiliation(s)
- T Okada
- Neuroscience Institute, Life Sciences Centre, Dalhousie University, Halifax, Nova Scotia, Canada
| | | | | | | | | |
Collapse
|
33
|
Mizuki N, Ota M, Katsuyama Y, Yabuki K, Ando H, Yoshida M, Onari K, Nikbin B, Davatchi F, Chams H, Ghaderi AA, Ohno S, Inoko H. HLA class I genotyping including HLA-B*51 allele typing in the Iranian patients with Behçet's disease. Tissue Antigens 2001; 57:457-62. [PMID: 11556970 DOI: 10.1034/j.1399-0039.2001.057005457.x] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
It is well known that Behçet's disease (BD) is strongly associated with human leukocyte antigen (HLA) B51 in many ethnic groups. However, there has been no published report as yet with respect to this association among the Iranian people. Furthermore, since it is now known that the B51 antigen can be encoded by 21 alleles, B*5101-B*5121, we performed HLA-B*51 allele typing as well as HLA class I genotyping of 48 Iranian patients with this disease. As a result, the frequency of the B*51 allele was significantly higher (62.1%) in the patient group as compared with the ethnically matched control group (31.8%) (Pc=0.067, R.R.=3.51). In the genotyping of B*51 alleles, 33 out of the 36 B*51-positive patients possessed B*5101 and the remaining 3 carried B*5108. This study revealed that Iranian patients with BD also had a strong association with HLA-B51. In addition, this significantly high incidence of HLA-B*51 was found to be caused by an increase in both the HLA-B*5101 and HLA-B*5108 alleles. However, there was no significant difference in the HLA-B*51 allelic distribution between the patient and control groups.
Collapse
Affiliation(s)
- N Mizuki
- Department of Ophthalmology, Yokohama City University School of Medicine, Kanazawa-ku, Yokohama, Kanagawa, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
34
|
Tani S, Katsuyama Y, Hayashi T, Suzuki H, Kato M, Gomi K, Kobayashi T, Tsukagoshi N. Characterization of the amyR gene encoding a transcriptional activator for the amylase genes in Aspergillus nidulans. Curr Genet 2001; 39:10-5. [PMID: 11318101 DOI: 10.1007/s002940000175] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.0] [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: 10/27/2022]
Abstract
The Aspergillus nidulans amyR gene and its cDNA were cloned and sequenced. The genomic gene comprised 2,092 bp, interrupted by two short introns, and encoded a cys-6 zinc transcriptional activator (AMYR) of 662 amino acid residues with a calculated molecular mass of 72,862 Da. Disruption of the amyR gene caused defects in the utilization of maltose and starch and abolished expression of the taaG2 gene encoding A. oryzae Taka-amylase A, which is inducibly and abundantly expressed in the wild-type A. nidulans. Expression of the amyR gene was under the control of the carbon catabolite repressor, CREA. The growth defect of the malA1 mutant on maltose was complemented by the amyR gene; and the amyR gene derived from the mutant possessed a single mutation, from A to T, at position 1,483, resulting in a substitution of His478 to Leu. These results indicate that the amyR gene is identical to the genetically defined malA gene. AMYR possessed five domains (Zn and MH1-MH4) homologous to Mal63p, a transcriptional activator for the genes involved in maltose utilization in Saccharomyces cerevisiae. The His478 to Leu substitution lay within the MH3 domain, corresponding to the negative regulatory domain of Mal63p which relieves the inhibitory effect on the activation function in response to maltose.
Collapse
Affiliation(s)
- S Tani
- Department of Biological Mechanisms and Functions, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya-shi, Aichi, Japan
| | | | | | | | | | | | | | | |
Collapse
|
35
|
Ota M, Katsuyama Y, Kimura A, Tsuchiya K, Kondo M, Naruse T, Mizuki N, Itoh K, Sasazuki T, Inoko H. A second susceptibility gene for developing rheumatoid arthritis in the human MHC is localized within a 70-kb interval telomeric of the TNF genes in the HLA class III region. Genomics 2001; 71:263-70. [PMID: 11170743 DOI: 10.1006/geno.2000.6371] [Citation(s) in RCA: 87] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Rheumatoid arthritis (RA) is a chronic inflammatory joint disease with a multifactorial genetic basis. However, pathogenic genes for RA other than the human leukocyte antigen (HLA)-DRB1 gene have yet to be identified. Here, we investigated whether there is a second susceptibility locus for RA within the human major histocompatibility complex using 18 microsatellite markers distributed from the centromeric (HSET) to the telomeric end (P5-15) of the 3.6-Mb HLA region. Statistical studies of associated alleles on each microsatellite locus showed that one pathogenic gene for RA in the HLA region is localized in the DRB1 gene, as expected. Further, a second susceptibility gene of RA was suggested to be present in the HLA class III region, narrowed to 70 kb, that is just telomeric of the TNF gene cluster (TNFA and LTA) and that is located between the microsatellites TNFa and C1-2-A. In this critical segment, four expressed genes have been thus far identified, NFKBIL1 (IkappaBL), ATP6G, BAT1, and MICB, all of which are candidate genes for determining susceptibility to RA. These results exclude the possibility of involvement of the TNFA genes (TNF-alpha) in the development of RA, which was suggested previously to be a strong candidate for RA in the class III region.
Collapse
Affiliation(s)
- M Ota
- Institute of Organ Transplants, Reconstructive Medicine, and Tissue Engineering, Department of Legal Medicine, Shinshu University Graduate School of Medicine, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, Nagano, Japan
| | | | | | | | | | | | | | | | | | | |
Collapse
|
36
|
Mizuki N, Yabuki K, Ota M, Verity D, Katsuyama Y, Ando H, Onari K, Goto K, Imagawa Y, Mandanat W, Fayyad F, Stanford M, Ohno S, Inoko H. Microsatellite mapping of a susceptible locus within the HLA region for Behçet's disease using Jordanian patients. Hum Immunol 2001; 62:186-90. [PMID: 11182230 DOI: 10.1016/s0198-8859(00)00246-9] [Citation(s) in RCA: 16] [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] [Indexed: 10/17/2022]
Abstract
Behçet's disease (BD) has been established to be associated with HLA-B51. However, it has not been revealed whether the HLA-B51 gene itself or another gene located near the HLA-B gene is directly involved in the pathogenesis of BD. Previously, using Japanese BD patients, our group has narrowed down a BD-causative gene to 46 kb between the MICA and HLA-B genes by means of fine mapping analysis with eight microsatellite markers distributed within a 1100 kb segment around the HLA-B gene. To know whether this mapping result is generally observed in BD of another population we have investigated repeat polymorphisms of the same microsatellite markers in Jordanian BD patients. Furthermore, we have evaluated these data by Mantel-Haenzel stratified analysis to find out a primarily associated locus for BD. As a result, HLA-B51 was found to be the most strongly and primarily associated marker. This result suggests that the pathogenic gene of BD is HLA-B51 itself, but unlikely to be other genes located in the vicinity of HLA-B.
Collapse
Affiliation(s)
- N Mizuki
- Department of Opthamology, Yokohama City University School of Medicine, Kanagawa, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
37
|
Liu C, Ota M, Katsuyama Y, Takayanagi K, Asamura H, Fukushima H. The structure, frequency, and forensic application of the STR locus D16S543 in the Japanese population. J Forensic Sci 2001; 46:116-9. [PMID: 11210894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
D16S543 is a complex STR locus consisting of five types of repeat units. The frequency distribution and genetic characteristics of this locus in Japanese were investigated using blood samples from 124 unrelated Japanese and 15 families. Alleles were detected using denatured polyacrylamide gels followed by automated analysis on an ABI 373 sequencer using Genescan software 672. Twenty-one alleles were identified, ranging in size from 281 to 489 bp. An allelic ladder containing the 21 alleles was constructed and used as a typing standard. The repeat unit arrays allowed the 21 alleles to be classified into three distinct groups, including alleles 1 to 7 in group I, alleles 8 to 14 in group II, and alleles 15 to 22 in group III. The alleles in group II were characterized by the insertion of one repeat unit of CAGG, one of AAAG, and three of AAGG, while the group III alleles differed from those of groups I and II by the insertion of a total of 32 repeat units ranging in 5 types. Within each group, the alleles differed from each other only in one 5' side tetranucleotide AAGG. The power of discrimination (Pd) and the estimated heterozygosity were calculated to be 0.989 and 0.934, respectively. Typing of this locus was successfully applied in four old forensic materials. The study presented herein demonstrates that D16S543 is a highly polymorphic and applicable locus in Japanese.
Collapse
Affiliation(s)
- C Liu
- Department of Legal Medicine, Shinshu University School of Medicine, Nagano, Japan
| | | | | | | | | | | |
Collapse
|
38
|
Sugimura K, Ota M, Matsuzawa J, Katsuyama Y, Ishizuka K, Mochizuki T, Mizuki N, Seki SS, Honma T, Inoko H, Asakura H. A close relationship of triplet repeat polymorphism in MHC class I chain-related gene A (MICA) to the disease susceptibility and behavior in ulcerative colitis. Tissue Antigens 2001; 57:9-14. [PMID: 11169253 DOI: 10.1034/j.1399-0039.2001.057001009.x] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Major histocompatibility complex (MHC) class I chain-related gene A (MICA) has been found near the HLA-B gene. The MICA molecule is exclusively expressed on gastrointestinal epithelium and recognized by intestinal epithelial gamma delta T cells, where it exhibits a triplet repeat polymorphism in the transmembrane region. We investigated the possible correlation between MICA genetic polymorphism and ulcerative colitis (UC). Eighty-three patients with UC and 132 unrelated controls were included in this study. All subjects were Japanese. A triplet repeat polymorphism in the transmembrane region of the MICA was determined by direct sequencing procedures after amplification by a polymerase chain reaction. A significantly higher allele and phenotype frequencies of MICA A6 allele were observed in patients with UC than controls (allele frequency: P(c)=0.000011, phenotype frequency: P(c)=0.0049 odds ratio=2.62). A6 homozygous patients with UC showed significantly earlier onset of UC than patients without the A6 allele ((P)c=0.0042). Phenotypes of MICA A6 allele in Japanese are closely related to the disease susceptibility and behavior in UC. Examinations of MICA polymorphism in other ethnic groups may provide important information about the locus of primary responsible gene for UC.
Collapse
Affiliation(s)
- K Sugimura
- Department of Internal Medicine III, Niigata University School of Medicine, Niigata, Japan.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
39
|
Mizuki N, Ota M, Yabuki K, Katsuyama Y, Ando H, Palimeris GD, Kaklamani E, Accorinti M, Pivetti-Pezzi P, Ohno S, Inoko H. Localization of the pathogenic gene of Behçet's disease by microsatellite analysis of three different populations. Invest Ophthalmol Vis Sci 2000; 41:3702-8. [PMID: 11053265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023] Open
Abstract
PURPOSE Behçet's disease (BD) is known to be associated with HLA-B51 in many ethnic groups. However, the pathogenic gene responsible for BD is as yet unknown. To localize the critical region of the pathogenic gene, microsatellite markers distributed around the HLA-B gene were investigated. The BD patients studied were of three ethnic origins: Japanese, Greek, or Italian. METHODS The total group consisted of 172 BD patients, of whom were 95 Japanese, 55 Greek, and 22 Italian. Eight polymorphic microsatellite markers distributed within 1100 kb of the HLA-B gene were analyzed using PCR and subsequent automated fragment detection by fluorescent-based technology. RESULTS Among the eight markers, allele 348 of the MIB microsatellite was remarkably common in all three BD populations (Japanese, PC: = 0.000014; Greek, PC: = 0. 00047; Italian, PC: = 0.11). However, HLA-B51 was found to be the marker most strongly associated with BD in each population (Japanese, PC: = 0.000000000017; Greek, PC: = 0.00000032; Italian, PC: = 0. 0074). In genotypic differentiation between the patients and controls, only HLA-B51 was found to be significantly associated with BD in all three populations. Stratification analysis suggested that significant associations of BD with MICA and other microsatellites resulted from a linkage disequilibrium with HLA-B51. CONCLUSIONS These results suggest that the pathogenic gene of BD is HLA-B51 itself and not other genes located in the vicinity of HLA-B.
Collapse
Affiliation(s)
- N Mizuki
- Department of Ophthalmology, Yokohama City University School of Medicine, Yokohama, Kanagawa, Japan
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
40
|
Tamai K, Semenov M, Kato Y, Spokony R, Liu C, Katsuyama Y, Hess F, Saint-Jeannet JP, He X. LDL-receptor-related proteins in Wnt signal transduction. Nature 2000; 407:530-5. [PMID: 11029007 DOI: 10.1038/35035117] [Citation(s) in RCA: 977] [Impact Index Per Article: 40.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The Wnt family of secreted signalling molecules are essential in embryo development and tumour formation. The Frizzled (Fz) family of serpentine receptors function as Wnt receptors, but how Fz proteins transduce signalling is not understood. In Drosophila, arrow phenocopies the wingless (DWnt-1) phenotype, and encodes a transmembrane protein that is homologous to two members of the mammalian low-density lipoprotein receptor (LDLR)-related protein (LRP) family, LRP5 and LRP6 (refs 12-15). Here we report that LRP6 functions as a co-receptor for Wnt signal transduction. In Xenopus embryos, LRP6 activated Wnt-Fz signalling, and induced Wnt responsive genes, dorsal axis duplication and neural crest formation. An LRP6 mutant lacking the carboxyl intracellular domain blocked signalling by Wnt or Wnt-Fz, but not by Dishevelled or beta-catenin, and inhibited neural crest development. The extracellular domain of LRP6 bound Wnt-1 and associated with Fz in a Wnt-dependent manner. Our results indicate that LRP6 may be a component of the Wnt receptor complex.
Collapse
Affiliation(s)
- K Tamai
- Division of Neuroscience, Children's Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA
| | | | | | | | | | | | | | | | | |
Collapse
|
41
|
Abstract
A 100-kb deletion including the MICA gene was recently reported in the HLA-B48 (B*4801)-associated haplotype in Japanese. Interestingly, this MICA deletion is accompanied by a MICB null allele, MICB0107N. In order to further investigate the universality of the apparent tight linkage between these two events, we present data on high-resolution deletion mapping of eight HLA-B48-homozygous individuals. Among these, five carried the MICA deletion linked to MICB0107N, as originally reported. Conversely, the remaining three possessed an intact MICA gene of MICA008 or MICA010 allelic variant associated this time with a putative expressed MICB allele, MICB0102. These results may imply that the expression of both MICA and MICB molecules is indispensable to viability through a yet-to-be understood mutual interaction in immune surveillance.
Collapse
Affiliation(s)
- M Ota
- Department of Legal Medicine, Shinshu University School of Medicine, Nagano, Japan
| | | | | | | | | | | | | | | |
Collapse
|
42
|
Kimura A, Ota M, Katsuyama Y, Ohbuchi N, Takahashi M, Kobayashi Y, Inoko H, Numano F. Mapping of the HLA-linked genes controlling the susceptibility to Takayasu's arteritis. Int J Cardiol 2000; 75 Suppl 1:S105-10; discussion S111-2. [PMID: 10980346 DOI: 10.1016/s0167-5273(00)00178-9] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
To further define the HLA-linked genes controlling the susceptibility to Takayasu's arteritis, polymorphisms in five microsatellites around the HLA-B and MICA genes, C1-2-A, MIB, C1-4-1, C1-2-5, and C1-3-1, were investigated in 91 Japanese patients with Takayasu's arteritis and 248 healthy Japanese controls. It was found that allele 238 of C1-2-A [60.4% in patients vs. 29.8% in controls, odds ratio (OR)=3.59, P(c)<0.000004], allele 332 of MIB (22.0% vs. 6. 1%, OR=4.32, P(c)<0.0003), allele 208 of C1-2-5 (47.3% vs. 24.6%, OR=2.75, P(c)=0.001), and allele 291 of C1-3-1 (62.6% vs. 44.8%, OR=2.07, P(c)<0.02) were significantly associated with the disease. Combined analyses of polymorphisms in the HLA-B and MICA genes with those in the microsatellites suggest that there are two different disease-susceptible loci for Takayasu's arteritis; one is mapped near the C1-2-A locus and the other is more closely linked to the HLA-B gene than to the MICA gene, because there are at least two different disease-associated HLA-B haplotypes, HLA-B*52 and -B*39.2 haplotypes, in which the disease-associated C1-2-A allele is shared in common.
Collapse
Affiliation(s)
- A Kimura
- Department of Molecular Pathogenesis, Division of Adult Diseases, Medical Research Institute, Tokyo Medical and Dental University, 2-3-10 Kandasurugadai, Chiyoda-ku, 101-0062, Tokyo, Japan.
| | | | | | | | | | | | | | | |
Collapse
|
43
|
Inada H, Yoshizawa K, Ota M, Katsuyama Y, Ichijo T, Umemura T, Tanaka E, Kiyosawa K. T cell repertoire in the liver of patients with primary biliary cirrhosis. Hum Immunol 2000; 61:675-83. [PMID: 10880738 DOI: 10.1016/s0198-8859(00)00129-4] [Citation(s) in RCA: 12] [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: 10/17/2022]
Abstract
Primary biliary cirrhosis (PBC) is an autoimmune chronic liver disease characterized by the destruction of the bile ducts with an accumulation of lymphocytes. To investigate the roles of T cells accumulating around the bile ducts, we analyzed the clonality of alphabeta T cell populations in the livers of patients with PBC by size spectratyping and sequencing of the T cell receptor (TCR) Vbeta transcripts.TCR Vbeta spectratyping of PBC patients showed several skewed complementarity determining region 3 (CDR3) size patterns suggestive of clonal predominance as well as Gaussian-like patterns suggestive of polyclonal expansion. We observed Vbeta4 clones sharing the Gly (G)-G motif in the CDR3 nDn regions and a Vbeta4-Jbeta2.7 combination in three patients bearing HLA-DR2 and -DQ1. G-Leu (L)-Ala (A) or G-L motifs were also seen in the nDn regions of Vbeta17 with Jbeta2.1 of the two patients having HLA-A26. However, there were no whole CDR3-shared clones in any of the patients. In conclusion, we have observed that T cell clones are heterogeneous in each patient, but that they have some common motifs in the TCR Vbeta CDR3. We strongly suggest that these clonally expanded T cells might be involved in the immunopathogenesis of PBC.
Collapse
Affiliation(s)
- H Inada
- Second Department of Internal Medicine, Shinshu University School of Medicine, Asahi, Matsumoto, Japan
| | | | | | | | | | | | | | | |
Collapse
|
44
|
Umemura T, Yoshizawa K, Ota M, Katsuyama Y, Inada H, Tanaka E, Kiyosawa K. Analysis of T cell repertoire in the liver of patients with chronic hepatitis C. Clin Exp Immunol 2000; 121:120-6. [PMID: 10886248 PMCID: PMC1905677 DOI: 10.1046/j.1365-2249.2000.01274.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Many T cells infiltrate into the liver of patients with chronic hepatitis C (CH-C). They are believed to play a crucial role in the immunopathogenesis of hepatic inflammation, but their clonality and specificity are unknown. The aim of this study was to clarify the characteristics of these T cells. We analysed the complementarity-determining region (CDR)3 size lengths of T cell receptor (TCR) beta-chains by size spectratyping, and determined the sequences of Vbeta CDR3 after subcloning Vbeta-specific polymerase chain reaction products. Spectratyping showed clonal expansions in all liver specimens, most of which showed more than two T cell clones. Moreover, many non-clonal T cells also accumulated in the liver. Clonality of the T cells suspected by spectratyping was confirmed by CDR3 sequencing. Although the sequences revealed no whole CDR3-shared clones among different patients, some common motif sequences were observed. Our data suggest that T cells are stimulated by several hepatitis C virus (HCV) epitopes, then accumulate in the liver of CH-C patients. Shared motifs of expanded T cell clones suggest that they might recognize the same regions of HCV peptides, but have differences due to HCV peptide mutational changes. These clones might also interact with non-clonal T cells and play a crucial role in the immunopathogenesis of CH-C.
Collapse
Affiliation(s)
- T Umemura
- Second Department of Internal Medicine, Department of Legal Medicine, Shinshu University School of Medicine, Matsumoto, Japan
| | | | | | | | | | | | | |
Collapse
|
45
|
Naruse TK, Matsuzawa Y, Ota M, Katsuyama Y, Matsumori A, Hara M, Nagai S, Morimoto S, Sasayama S, Inoko H. HLA-DQB1*0601 is primarily associated with the susceptibility to cardiac sarcoidosis. Tissue Antigens 2000; 56:52-7. [PMID: 10958356 DOI: 10.1034/j.1399-0039.2000.560107.x] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Cardiac sarcoidosis occurs in 1-5% of sarcoidosis patients. We previously reported a significant increase of the uncommon TNFA (tumor necrosis factor alpha) allele, TNFA2 with cardiac sarcoidosis in Japanese. In order to precisely localize the susceptible locus for cardiac sarcoidosis within the HLA region, genetic polymorphisms of classical HLA genes, non-classical HLA class II genes such as HLA-DMA and -DMB genes and several genes involved in the class I-mediated antigen presentation pathway (TAP1, TAP2, LMP2 and LMP7) were investigated. Further, association analyses using four polymorphic microsatellite markers located around the TAP1 and TNFA genes were also carried out. As a result, HLA-DQB1*0601 was found to be the most significantly associated allele, being more significantly increased than TNFA2. No significant increase of the DR52-associated DRB1 alleles (DRB1*03, 05, 06 and 08), which was suggested to be primarily associated with lung sarcoidosis, was observed in cardiac sarcoidosis. A primary role of DQB1*0601 in determination of the susceptibility to cardiac sarcoidosis was supported by association analysis using four polymorphic microsatellite markers, in which only the TAP1 microsatellite locus, the nearest marker to the DQB1 gene among the microsatellites tested, displayed a significant positive association with cardiac sarcoidosis. On the other hand, the HLA-DQB1*0501-DQA1*0101-DRB1*0101-B7 haplotype showed a negative association with the disease, as similarly observed in lung sarcoidosis. Thus, molecular mechanism for controlling the development of the disease related to HLA molecules are different between cardiac and lung sarcoidosis, whereas those for conferring a resistant trait may be similar to each other.
Collapse
Affiliation(s)
- T K Naruse
- Department of Genetic Information, Tokai University School of Medicine, Isehara Kanagawa, Japan
| | | | | | | | | | | | | | | | | | | |
Collapse
|
46
|
Kera J, Mizuki N, Ota M, Katsuyama Y, Pivetti-Pezzi P, Ohno S, Inoko H. Significant associations of HLA-B*5101 and B*5108, and lack of association of class II alleles with Behçet's disease in Italian patients. Tissue Antigens 1999; 54:565-71. [PMID: 10674970 DOI: 10.1034/j.1399-0039.1999.540605.x] [Citation(s) in RCA: 59] [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] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Behçet's disease has been known to be strongly associated with human leukocyte antigen (HLA) B51, one of the split antigens of HLA-B5. An increased incidence of HLA-B51 in the patient group has also been reported in an Italian population. Since the B51 antigen has been recently identified to comprise nine alleles, B*5101-B*5109, we performed HLA-B51 allele genotyping by the polymerase chain reaction-sequencing based typing (PCR-SBT) method as well as serological HLA-A and -B typing among 21 Italian patients with Behçet's disease in order to investigate whether there is any correlation of one particular B51-associated allele with Behcet's disease. In addition, HLA class II genotyping was performed by the PCR-restriction fragment length polymorphism (RFLP) method. As a result, only the phenotype frequency of the B51 antigen was found to be significantly increased in the patient group as compared to the ethnically matched control group by the corrected P-value analysis (71.4% in patients vs. 17.9% in controls; chi2 = 14.26, Pc = 0.0042, R.R. = 11.5). In the B51 allele genotyping, 11 out of 15 B51-positive patients were B*5101 and the remaining four were B*5108, whereas all of 5 normal controls were B*5101, showing significant association of each allele with Behçet's disease. No significant difference was observed between the patient and control groups in the HLA class II allelic distribution. This study revealed a strong association of Behçet's disease in Italian with B*5108 as well as B*5101, providing important insight into the molecular mechanism underlying an HLA association with Behçet's disease.
Collapse
Affiliation(s)
- J Kera
- Department of Genetic Information, Tokai University School of Medicine, Bohseidai, Isehara, Kanagawa, Japan
| | | | | | | | | | | | | |
Collapse
|
47
|
Wada S, Katsuyama Y, Saiga H. Anteroposterior patterning of the epidermis by inductive influences from the vegetal hemisphere cells in the ascidian embryo. Development 1999; 126:4955-63. [PMID: 10529414 DOI: 10.1242/dev.126.22.4955] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.2] [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: 11/20/2022]
Abstract
Patterning along the anteroposterior axis is a critical step during animal embryogenesis. Although mechanisms of anteroposterior patterning in the neural tube have been studied in various chordates, little is known about those of the epidermis. To approach this issue, we investigated patterning mechanisms of the epidermis in the ascidian embryo. First we examined expression of homeobox genes (Hrdll-1, Hroth, HrHox-1 and Hrcad) in the epidermis. Hrdll-1 is expressed in the anterior tip of the epidermis that later forms the adhesive papillae, while Hroth is expressed in the anterior part of the trunk epidermis. HrHox-1 and Hrcad are expressed in middle and posterior parts of the epidermis, respectively. These data suggested that the epidermis of the ascidian embryo is patterned anteroposteriorly. In ascidian embryogenesis, the epidermis is exclusively derived from animal hemisphere cells. To investigate regulation of expression of the four homeobox genes in the epidermis by vegetal hemisphere cells, we next performed hemisphere isolation and cell ablation experiments. We showed that removal of the vegetal cells before the late 16-cell stage results in loss of expression of these homeobox genes in the animal hemisphere cells. Expression of Hrdll-1 and Hroth depends on contact with the anterior-vegetal (the A-line) cells, while expression of HrHox-1 and Hrcad requires contact with the posterior-vegetal (the B-line) cells. We also demonstrated that contact with the vegetal cells until the late 32-cell stage is sufficient for animal cells to express Hrdll-1, Hroth and Hrcad, while longer contact is necessary for HrHox-1 expression. Contact with the A-line cells until the late 32-cell stage is also sufficient for formation of the adhesive papillae. Our data indicate that the epidermis of the ascidian embryo is patterned along the anteroposterior axis by multiple inductive influences from the vegetal hemisphere cells and provide the first insight into mechanisms of epidermis patterning in the chordate embryos.
Collapse
Affiliation(s)
- S Wada
- Department of Biological Sciences, Graduate School of Science, Tokyo Metropolitan University, Hachiohji, Tokyo 192-0397, Japan
| | | | | |
Collapse
|
48
|
Oka A, Tamiya G, Tomizawa M, Ota M, Katsuyama Y, Makino S, Shiina T, Yoshitome M, Iizuka M, Sasao Y, Iwashita K, Kawakubo Y, Sugai J, Ozawa A, Ohkido M, Kimura M, Bahram S, Inoko H. Association analysis using refined microsatellite markers localizes a susceptibility locus for psoriasis vulgaris within a 111 kb segment telomeric to the HLA-C gene. Hum Mol Genet 1999; 8:2165-70. [PMID: 10545595 DOI: 10.1093/hmg/8.12.2165] [Citation(s) in RCA: 127] [Impact Index Per Article: 5.1] [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: 11/13/2022] Open
Abstract
The HLA-Cw6 antigen has been associated with psoriasis vulgaris despite racial and ethnic differences. However, it remains unclear whether it is the HLA-Cw6 antigen itself or a closely linked, hitherto unidentified, locus that predisposes to the disease. Here, in order to map the susceptibility locus for psoriasis vulgaris precisely within the HLA class I region, 11 polymorphic microsatellite markers distributed throughout a 1060 kb segment surrounding the HLA-C locus were subjected to association analysis in Japanese psoriasis vulgaris patients. Statistical analyses of the distribution and deviation from Hardy-Weinberg equilibrium of the allelic frequency at each micro-satellite locus revealed that the pathogenic gene for psoriasis vulgaris is located within a reduced interval of 111 kb spanning 89-200 kb telomeric of the HLA-C gene. In addition to three known genes, POU5F1, TCF19 and S, this 111 kb fragment contains four new, expressed genes identified in the course of our genomic sequencing of the entire HLA class I region. Therefore, these seven genes are the potential candidates for susceptibility to psoriasis vulgaris.
Collapse
Affiliation(s)
- A Oka
- Department of Genetic Information, Tokai University School of Medicine,Bohseidai, Kanagawa, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
49
|
Abstract
Although the tail is one of the major characteristics of animals of the phylum Chordata, evolutionary aspects of the molecular mechanisms involved in its formation are not clear. To obtain insights into these issues, we have isolated and investigated the caudal gene of an ascidian, one of the lower animal groups among chordates. Ascidian caudal is expressed from the midgastrula stage onward in the lateral walls of the posterior neural tube cell lineage and also in the posterior epidermal cells from the neurula stage. Thus, ascidian caudal expression is restricted to the ectoderm of a tail-forming region throughout embryogenesis. Suppression of caudal function by an antisense oligonucleotide or a dominant negative construct caused inhibition of the cell movement required for tail formation. Overexpression of wild-type caudal mRNA in an ascidian animal cap, an animal half explant prepared at the eight-cell stage, caused elongation of the cap. Furthermore, Xenopus embryos injected with dominant negative ascidian caudal exhibited defects in elongation, suggesting a conserved caudal function among chordates. These results indicate that caudal function is required for chordate tail formation and may play a key role in its evolution.
Collapse
Affiliation(s)
- Y Katsuyama
- Laboratory of Molecular Neurobiology, NIBH, Higashi 1-1, Tsukuba, 305-8566, Japan
| | | | | | | |
Collapse
|
50
|
Mizuki N, Ota M, Katsuyama Y, Yabuki K, Ando H, Goto K, Nakamura S, Bahram S, Ohno S, Inoko H. Association analysis between the MIC-A and HLA-B alleles in Japanese patients with Behçet's disease. Arthritis Rheum 1999; 42:1961-6. [PMID: 10513813 DOI: 10.1002/1529-0131(199909)42:9<1961::aid-anr23>3.0.co;2-7] [Citation(s) in RCA: 72] [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] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
OBJECTIVE Behçet's disease is known to be strongly associated with HLA-B51 in many different ethnic groups. Recently, by association analysis using refined microsatellite mapping, the critical region for Behçet's disease was identified as a 46-kb segment centromeric to the HLA-B gene. No expressed gene has been detected in this segment to date except the MIC-A (major histocompatibility complex class I chain-related gene A) and HLA-B genes. The present study was undertaken to analyze allelic distribution of the MIC-A gene among Japanese patients with Behçet's disease. METHODS Ninety-five Japanese patients with Behçet's disease and 116 ethnically matched healthy controls were enrolled in this study. MIC-A genotyping was performed by direct sequencing of polymerase chain reaction products from exons 2, 3, and 4 of the MIC-A gene, using an automated DNA sequencer. RESULTS The MIC-A009 allele was significantly more frequent in the patient group (69.5%) compared with the healthy controls (31.0%) (relative risk 5.06, corrected P = 0.00000024). In stratification analysis on the confounding effect of MIC-A009 on HLA-B*51 association and vice versa, Behçet's disease was distinctively associated only with HLA-B*51. Further, MIC-A009 was found to be strongly associated not only with HLA-B51, but also with HLA-B52, which was not increased in the patient group to any degree. CONCLUSION These results imply that the real disease susceptibility gene involved in the development of Behçet's disease is the HLA-B*51 allele itself and that the significant increase of the MIC-A009 allele in the patient group results secondarily from a strong linkage disequilibrium with HLA-B*51.
Collapse
Affiliation(s)
- N Mizuki
- Yokohama City University School of Medicine, Yokohama, Japan
| | | | | | | | | | | | | | | | | | | |
Collapse
|