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Effects of empagliflozin on progression of chronic kidney disease: a prespecified secondary analysis from the empa-kidney trial. Lancet Diabetes Endocrinol 2024; 12:39-50. [PMID: 38061371 PMCID: PMC7615591 DOI: 10.1016/s2213-8587(23)00321-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 10/24/2023] [Accepted: 10/25/2023] [Indexed: 12/23/2023]
Abstract
BACKGROUND Sodium-glucose co-transporter-2 (SGLT2) inhibitors reduce progression of chronic kidney disease and the risk of cardiovascular morbidity and mortality in a wide range of patients. However, their effects on kidney disease progression in some patients with chronic kidney disease are unclear because few clinical kidney outcomes occurred among such patients in the completed trials. In particular, some guidelines stratify their level of recommendation about who should be treated with SGLT2 inhibitors based on diabetes status and albuminuria. We aimed to assess the effects of empagliflozin on progression of chronic kidney disease both overall and among specific types of participants in the EMPA-KIDNEY trial. METHODS EMPA-KIDNEY, a randomised, controlled, phase 3 trial, was conducted at 241 centres in eight countries (Canada, China, Germany, Italy, Japan, Malaysia, the UK, and the USA), and included individuals aged 18 years or older with an estimated glomerular filtration rate (eGFR) of 20 to less than 45 mL/min per 1·73 m2, or with an eGFR of 45 to less than 90 mL/min per 1·73 m2 with a urinary albumin-to-creatinine ratio (uACR) of 200 mg/g or higher. We explored the effects of 10 mg oral empagliflozin once daily versus placebo on the annualised rate of change in estimated glomerular filtration rate (eGFR slope), a tertiary outcome. We studied the acute slope (from randomisation to 2 months) and chronic slope (from 2 months onwards) separately, using shared parameter models to estimate the latter. Analyses were done in all randomly assigned participants by intention to treat. EMPA-KIDNEY is registered at ClinicalTrials.gov, NCT03594110. FINDINGS Between May 15, 2019, and April 16, 2021, 6609 participants were randomly assigned and then followed up for a median of 2·0 years (IQR 1·5-2·4). Prespecified subgroups of eGFR included 2282 (34·5%) participants with an eGFR of less than 30 mL/min per 1·73 m2, 2928 (44·3%) with an eGFR of 30 to less than 45 mL/min per 1·73 m2, and 1399 (21·2%) with an eGFR 45 mL/min per 1·73 m2 or higher. Prespecified subgroups of uACR included 1328 (20·1%) with a uACR of less than 30 mg/g, 1864 (28·2%) with a uACR of 30 to 300 mg/g, and 3417 (51·7%) with a uACR of more than 300 mg/g. Overall, allocation to empagliflozin caused an acute 2·12 mL/min per 1·73 m2 (95% CI 1·83-2·41) reduction in eGFR, equivalent to a 6% (5-6) dip in the first 2 months. After this, it halved the chronic slope from -2·75 to -1·37 mL/min per 1·73 m2 per year (relative difference 50%, 95% CI 42-58). The absolute and relative benefits of empagliflozin on the magnitude of the chronic slope varied significantly depending on diabetes status and baseline levels of eGFR and uACR. In particular, the absolute difference in chronic slopes was lower in patients with lower baseline uACR, but because this group progressed more slowly than those with higher uACR, this translated to a larger relative difference in chronic slopes in this group (86% [36-136] reduction in the chronic slope among those with baseline uACR <30 mg/g compared with a 29% [19-38] reduction for those with baseline uACR ≥2000 mg/g; ptrend<0·0001). INTERPRETATION Empagliflozin slowed the rate of progression of chronic kidney disease among all types of participant in the EMPA-KIDNEY trial, including those with little albuminuria. Albuminuria alone should not be used to determine whether to treat with an SGLT2 inhibitor. FUNDING Boehringer Ingelheim and Eli Lilly.
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T, Tamori Y, Tamura R, Tamura Y, Tan CHH, Tan EZZ, Tanabe A, Tanabe K, Tanaka A, Tanaka A, Tanaka N, Tang S, Tang Z, Tanigaki K, Tarlac M, Tatsuzawa A, Tay JF, Tay LL, Taylor J, Taylor K, Taylor K, Te A, Tenbusch L, Teng KS, Terakawa A, Terry J, Tham ZD, Tholl S, Thomas G, Thong KM, Tietjen D, Timadjer A, Tindall H, Tipper S, Tobin K, Toda N, Tokuyama A, Tolibas M, Tomita A, Tomita T, Tomlinson J, Tonks L, Topf J, Topping S, Torp A, Torres A, Totaro F, Toth P, Toyonaga Y, Tripodi F, Trivedi K, Tropman E, Tschope D, Tse J, Tsuji K, Tsunekawa S, Tsunoda R, Tucky B, Tufail S, Tuffaha A, Turan E, Turner H, Turner J, Turner M, Tuttle KR, Tye YL, Tyler A, Tyler J, Uchi H, Uchida H, Uchida T, Uchida T, Udagawa T, Ueda S, Ueda Y, Ueki K, Ugni S, Ugwu E, Umeno R, Unekawa C, Uozumi K, Urquia K, Valleteau A, Valletta C, van Erp R, Vanhoy C, Varad V, Varma R, Varughese A, Vasquez P, Vasseur A, Veelken R, Velagapudi C, Verdel K, Vettoretti S, Vezzoli G, Vielhauer V, Viera R, Vilar E, Villaruel S, Vinall L, Vinathan J, Visnjic M, Voigt E, von-Eynatten M, Vourvou M, Wada J, Wada J, Wada T, Wada Y, Wakayama K, Wakita Y, Wallendszus K, Walters T, Wan Mohamad WH, Wang L, Wang W, Wang X, Wang X, Wang Y, Wanner C, Wanninayake S, Watada H, Watanabe K, Watanabe K, Watanabe M, Waterfall H, Watkins D, Watson S, Weaving L, Weber B, Webley Y, Webster A, Webster M, Weetman M, Wei W, Weihprecht H, Weiland L, Weinmann-Menke J, Weinreich T, Wendt R, Weng Y, Whalen M, Whalley G, Wheatley R, Wheeler A, Wheeler J, Whelton P, White K, Whitmore B, Whittaker S, Wiebel J, Wiley J, Wilkinson L, Willett M, Williams A, Williams E, Williams K, Williams T, Wilson A, Wilson P, Wincott L, Wines E, Winkelmann B, Winkler M, Winter-Goodwin B, Witczak J, Wittes J, Wittmann M, Wolf G, Wolf L, Wolfling R, Wong C, Wong E, Wong HS, Wong LW, Wong YH, Wonnacott A, Wood A, Wood L, Woodhouse H, Wooding N, Woodman A, Wren K, Wu J, Wu P, Xia S, Xiao H, Xiao X, Xie Y, Xu C, Xu Y, Xue H, Yahaya H, Yalamanchili H, Yamada A, Yamada N, Yamagata K, Yamaguchi M, Yamaji Y, Yamamoto A, Yamamoto S, Yamamoto S, Yamamoto T, Yamanaka A, Yamano T, Yamanouchi Y, Yamasaki N, Yamasaki Y, Yamasaki Y, Yamashita C, Yamauchi T, Yan Q, Yanagisawa E, Yang F, Yang L, Yano S, Yao S, Yao Y, Yarlagadda S, Yasuda Y, Yiu V, Yokoyama T, Yoshida S, Yoshidome E, Yoshikawa H, Young A, Young T, Yousif V, Yu H, Yu Y, Yuasa K, Yusof N, Zalunardo N, Zander B, Zani R, Zappulo F, Zayed M, Zemann B, Zettergren P, Zhang H, Zhang L, Zhang L, Zhang N, Zhang X, Zhao J, Zhao L, Zhao S, Zhao Z, Zhong H, Zhou N, Zhou S, Zhu D, Zhu L, Zhu S, Zietz M, Zippo M, Zirino F, Zulkipli FH. Impact of primary kidney disease on the effects of empagliflozin in patients with chronic kidney disease: secondary analyses of the EMPA-KIDNEY trial. Lancet Diabetes Endocrinol 2024; 12:51-60. [PMID: 38061372 DOI: 10.1016/s2213-8587(23)00322-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 10/24/2023] [Accepted: 10/25/2023] [Indexed: 12/23/2023]
Abstract
BACKGROUND The EMPA-KIDNEY trial showed that empagliflozin reduced the risk of the primary composite outcome of kidney disease progression or cardiovascular death in patients with chronic kidney disease mainly through slowing progression. We aimed to assess how effects of empagliflozin might differ by primary kidney disease across its broad population. METHODS EMPA-KIDNEY, a randomised, controlled, phase 3 trial, was conducted at 241 centres in eight countries (Canada, China, Germany, Italy, Japan, Malaysia, the UK, and the USA). Patients were eligible if their estimated glomerular filtration rate (eGFR) was 20 to less than 45 mL/min per 1·73 m2, or 45 to less than 90 mL/min per 1·73 m2 with a urinary albumin-to-creatinine ratio (uACR) of 200 mg/g or higher at screening. They were randomly assigned (1:1) to 10 mg oral empagliflozin once daily or matching placebo. Effects on kidney disease progression (defined as a sustained ≥40% eGFR decline from randomisation, end-stage kidney disease, a sustained eGFR below 10 mL/min per 1·73 m2, or death from kidney failure) were assessed using prespecified Cox models, and eGFR slope analyses used shared parameter models. Subgroup comparisons were performed by including relevant interaction terms in models. EMPA-KIDNEY is registered with ClinicalTrials.gov, NCT03594110. FINDINGS Between May 15, 2019, and April 16, 2021, 6609 participants were randomly assigned and followed up for a median of 2·0 years (IQR 1·5-2·4). Prespecified subgroupings by primary kidney disease included 2057 (31·1%) participants with diabetic kidney disease, 1669 (25·3%) with glomerular disease, 1445 (21·9%) with hypertensive or renovascular disease, and 1438 (21·8%) with other or unknown causes. Kidney disease progression occurred in 384 (11·6%) of 3304 patients in the empagliflozin group and 504 (15·2%) of 3305 patients in the placebo group (hazard ratio 0·71 [95% CI 0·62-0·81]), with no evidence that the relative effect size varied significantly by primary kidney disease (pheterogeneity=0·62). The between-group difference in chronic eGFR slopes (ie, from 2 months to final follow-up) was 1·37 mL/min per 1·73 m2 per year (95% CI 1·16-1·59), representing a 50% (42-58) reduction in the rate of chronic eGFR decline. This relative effect of empagliflozin on chronic eGFR slope was similar in analyses by different primary kidney diseases, including in explorations by type of glomerular disease and diabetes (p values for heterogeneity all >0·1). INTERPRETATION In a broad range of patients with chronic kidney disease at risk of progression, including a wide range of non-diabetic causes of chronic kidney disease, empagliflozin reduced risk of kidney disease progression. Relative effect sizes were broadly similar irrespective of the cause of primary kidney disease, suggesting that SGLT2 inhibitors should be part of a standard of care to minimise risk of kidney failure in chronic kidney disease. FUNDING Boehringer Ingelheim, Eli Lilly, and UK Medical Research Council.
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Mizushima I, Saeki T, Kobayashi D, Hayashi H, Taniguchi Y, Nakata H, Matsui S, Nagasawa T, Yanagita M, Kawano M. POS1349 IMMUNOGLOBULIN G4-RELATED KIDNEY DISEASE’S PREDISPOSITION TO CHRONIC RENAL DYSFUNCTION, COMPLICATIONS OF MALIGNANCY, AND MORTALITY: A LONG-TERM NATIONWIDE MULTICENTER STUDY IN JAPAN. Ann Rheum Dis 2022. [DOI: 10.1136/annrheumdis-2022-eular.3015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BackgroundIn immunoglobulin G4-related kidney disease (IgG4-RKD), persistent renal insufficiency may be observed despite the good initial response to glucocorticoids[1, 2]. However, its long-term prognosis in relation to renal function as well as malignancy and mortality has not been well clarified.ObjectivesTo clarify the long-term renal prognosis, complications of malignancy, mortality, and factors related to those outcomes in IgG4-RKD.MethodsWe retrospectively reviewed the medical records of patients with IgG4-RKD diagnosed by the expert members of the IgG4-RKD working group in the Japanese Society of Nephrology. We investigated clinical, radiological, and histopathological features at baseline and course of renal function, complications of malignancy, and mortality during the long-term observation periods (median 71 months) in 75 patients. Using collected data, we calculated the crude incidence rates (IR) of chronic kidney disease (CKD) status, malignancy, and death. Cox regression analyses were performed to assess CKD-related factors. Additionally, we calculated the standardized incidence ratio (SIR) of malignancy and standardized mortality ratio (SMR) using national Japan statistics.ResultsFifty-nine patients were male, and 16 were female (median age 70 years). At diagnosis, their median eGFR was 45.1 mL/min/1.73m2 (interquartile range [IQR] 28.6-69.9). Seventy-two patients (96%) were treated with prednisolone at a median initial dose of 30 (IQR 30-39) mg/day, leading to a reasonable initial improvement of renal function. The IR of CKD was 30.2/100 person-years, and 66.7% (50/75) of the patients showed CKD at the last visit. Age- and sex-adjusted Cox regression analyses indicated that lower eGFR (per 10 mL/min/1.73m2, hazard ratio [HR] 0.70, 95% confidence interval [CI] 0.61-0.80), pre-existing hypertension (HR 2.39, 95% CI 1.32-4.34), and wider areas with inflammation (>50% vs. <10%, HR 2.55, 95% CI 1.07-6.08) or fibrosis (>50% vs. <5%, HR 2.84, 95% CI 1.18-6.85) in the biopsied renal specimens at treatment initiation had a significant impact on the time to CKD. Eight patients (10.7%) died during follow-up due to malignancy, severe infection, cerebral hemorrhage, or myocardial infarction. The crude mortality rate was 1.76/100 person-years, and a SMR calculated according to national Japan statistics was 0.97 (95% CI 0.42-1.90). On the other hand, 15 patients were diagnosed as having malignancies during follow-up. The IR of malignancy was 3.71/100 person-years, and the SIR of malignancy was 1.80 (95% CI 1.03-2.93).ConclusionThis study suggests that pre-treated renal insufficiency and extensive renal inflammatory and fibrotic lesions are related to CKD under glucocorticoid therapy in IgG4-RKD. Similarly with the whole IgG4-related disease, IgG4-RKD may have an increased incidence of malignancy but a mortality rate equivalent to the age- and sex-matched Japanese population.References[1]Saeki T et al. The clinical course of patients with IgG4-related kidney disease. Kidney Int. 2013 Oct;84(4):826-33.[2]Mizushima I et al. Factors related to renal cortical atrophy development after glucocorticoid therapy in IgG4-related kidney disease: a retrospective multicenter study. Arthritis Res Ther. 2016 Nov 25;18(1):273.Disclosure of InterestsNone declared
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Ito K, Nakagawa M, Hori K, Tashima L, Goto M, Yanagida S, Suzuki J, Kaya R, Kawabata A, Park J, Nasu H, Nishio S, Kondo E, Kaneda M, Tsubamoto H, Arakawa A, Nagasawa T, Yamada K. 834P A phase II study of gemcitabine, cisplatin, and bevacizumab for first recurrent and refractory ovarian clear-cell carcinoma (KCOG-G1601 trial). Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.08.973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Saeki T, Kawano M, Nagasawa T, Ubara Y, Taniguchi Y, Yanagita M, Nishi S, Nagata M, Yamaguchi Y, Saito T, Nakashima H. FRI0503 VALIDATION OF THE 2019 ACR/EULAR CLASSIFICATION CRITERIA FOR IGG4-RELATED DISEASE IN A JAPANESE KIDNEY DISEASE COHORT: A MULTI-CENTER RETROSPECTIVE STUDY BY THE IGG4-RELATED KIDNEY DISEASE (IGG4-RKD) WORKING GROUP OF THE JAPANESE SOCIETY OF NEPHROLOGY. Ann Rheum Dis 2020. [DOI: 10.1136/annrheumdis-2020-eular.1097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Background:The 2019 ACR/EULAR classification criteria for IgG4-RD have recently been published1). In the criteria, patients with an inclusion criteria score of >20 without exclusion criteria are classified as having IgG4-RD.Objectives:To validate the 2019 ACR/EULAR classification criteria for IgG4-RD in a Japanese kidney disease cohort.Methods:The study involved Japanese patients diagnosed as having kidney disease between April 2012 and May 2019, for whom sufficient clinical information and data on serum IgG4 values and/or immunohistological staining for IgG4 in renal biopsy samples were known. These patients were classified as having IgG4-RKD or non-IgG4-RKD (mimickers) based on the 2019 ACR/EULAR classification criteria for IgG4-RD, and the results were evaluated by expert opinion.Results:Among 105 included patients, the expert panel diagnosed 55 as having true IgG4-RKD and 50 as mimickers. The final diagnoses among the mimickers were vasculitis (n=11), idiopathic tubulointerstitial nephritis (TIN) (n=5), drug-induced TIN (n=5), Sjögren’s syndrome (n=4) and others. Among the 55 true IgG4-RKD patients, 4 had exclusion criteria, and 50 of the remaining 51 had an inclusion criteria score of ≥20 points (sensitivity 90.9%). On the other hand, 49 of the 50 mimickers were classified as having non-IgG4-RKD (specificity 98.0%) (Table 1).Table 1.General characteristics and prevalence of individual items of true IgG4-RKD and non-IgG4-RKD (mimicker)IgG4-RKD(true IgG4-RKD)(n=55)Non-IgG4-RKD(mimicker)(n=50)PAge at diagnosis,mean ±SD (years)69.9 ± 9.456.7 ± 17.4<0.001Male (%)76.4440.001Elevated serum IgG454/55 (98.2%)18/50 (36.0%)<0.001Serum IgG4 (mg/dl), mean±SD1028 ± 796226 ± 261<0.001Dense IgG4+Plasma cells (>10/hpf) in the kidney biopsy48/51 (94.1%)13/40 (32.5%)<0.001Storiform fibrosis in the kidney biopsy28/51 (54.9%)3/50 (6%)<0.001Hypocomplementemia39/55 (70.1%)7/42 (16.7%)<0.001Renal pelvis thickening/soft tissue5/55 (9%)1/50 (2%)0.20Bilateral renal cortex low-density areas29/55 (52.7%)7/50 (14.0%)<0.001Exclusion criteria present4/55 (7.3%)22/50 (44%)<0.001Total inclusion criteria points >20 without exclusion criteria50/55 (90.9%)1/50 (2%)<0.001Conclusion:The 2019 ACR/EULAR classification criteria for IgG4-RD showed good agreement with expert classification in this Japanese kidney disease cohort.References:[1] Wallace ZS, et al. The 2019 American College of Rheumatology/European League Against Rheumatism classification criteria for IgG4-related disease. Ann Rheum Dis. 79:77-87, 2020Disclosure of Interests:None declared
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Fujimura S, Nagasawa T, Kawamura M, Sato T, Sato T. The sterilization effect against Staphylococcus aureus and Pseudomonas aeruginosa on the contact lens using the Ultraviolet C irradiation. J Infect Public Health 2020. [DOI: 10.1016/j.jiph.2020.01.119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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Swain DK, Narzary A, Singh AK, Chandra A, Nagasawa T, Yamamoto S, Mitsuishi M, Rath S. Observation of self-polarization in BSA protected Au 20 clusters. Nanotechnology 2017; 28:445704. [PMID: 28820424 DOI: 10.1088/1361-6528/aa8718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Bovine serum albumin (BSA)-protected gold clusters (atomicity ∼ 20), prepared using a wet chemical route, show strong dipolar radiative transition with a gap energy of 1.93 eV due to the high oscillator strength, as confirmed by the emission studies. Self-arrangement of the clusters with fixed atomicity yields a low dispersive dielectric and electric self-polarization nature. The electrical hysteresis loop measurements returned a remanent polarization of 0.05 μC cm-2, which can be correlated with the dipolar orientation (activation energy ∼ 45.32 meV), originating from the structure-dependent deformation of the charge density.
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Affiliation(s)
- D K Swain
- School of Basic Sciences, Indian Institute of Technology Bhubaneswar, Jatni, 752050, Odisha, India
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Takeuchi S, Kagabu M, Nagasawa T, Omi H, Nitta Y, Itamochi H, Sugiyama T. Phase 1/2 trials of peptides cocktail vaccine for resistant cervical and ovarian cancer: Qol analysis. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx372.040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Tatsumi J, Tatsumi Y, Tatsumi N, Nagasawa T. Influences of red cell deformability on trapped plasma volume. Clin Hemorheol Microcirc 2016. [DOI: 10.3233/ch-1984-4604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- J. Tatsumi
- Osaka City University Medical School, Department of Laboratory Medicine, Abeno, Osaka, Japan
| | - Y. Tatsumi
- Osaka City University Medical School, Department of Laboratory Medicine, Abeno, Osaka, Japan
| | - N. Tatsumi
- Osaka City University Medical School, Department of Laboratory Medicine, Abeno, Osaka, Japan
| | - T. Nagasawa
- Osaka City University Medical School, Department of Physiology, Abeno, Osaka, Japan
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Watanabe H, Tanaka N, Inuta T, Kanamori T, Nagasawa T, Koseki S, Yanagi H. Recovery of walking ability using a hybrid assistive limb in persons with subacute stroke: a randomized controlled pilot study. Physiotherapy 2015. [DOI: 10.1016/j.physio.2015.03.1620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Goto R, Tanaka N, Kanamori T, Nagasawa T, Koseki S, Yanagi H. Factors associated with independence in activities of daily living in elderly people with disuse syndrome. Physiotherapy 2015. [DOI: 10.1016/j.physio.2015.03.3261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Ishikawa K, Nagasawa T, Nakabayashi K, Fukui H, Shimada H. An influence of hemodialysis upon electrocardiographic waveforms. Adv Cardiol 2015; 21:210-3. [PMID: 619541 DOI: 10.1159/000400451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Nagasawa T. Speech rehabilitation in Japan. Adv Otorhinolaryngol 2015; 29:209-15. [PMID: 6837373 DOI: 10.1159/000407494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Shimizu S, Momozawa Y, Takahashi A, Nagasawa T, Ashikawa K, Terada Y, Izumi Y, Kobayashi H, Tsuji M, Kubo M, Furuichi Y. A Genome-wide Association Study of Periodontitis in a Japanese Population. J Dent Res 2015; 94:555-61. [DOI: 10.1177/0022034515570315] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Periodontitis is a multifactorial disease in which bacterial, lifestyle, and genetic factors are involved. Although previous genetic association studies identified several susceptibility genes for periodontitis in European populations, there is little information for Asian populations. Here, we conducted a genome-wide association study and a replication study consisting of 2,760 Japanese periodontitis patients and 15,158 Japanese controls. Although single-nucleotide polymorphisms that surpassed a stringent genome-wide significance threshold ( P < 5 × 10−8) were not identified, we found 2 suggestive loci for periodontitis: KCNQ5 on chromosome 6q13 (rs9446777, P = 4.83 × 10−6, odds ratio = 0.82) and GPR141-NME8 at chromosome 7p14.1 (rs2392510, P = 4.17 × 10−6, odds ratio = 0.87). A stratified analysis indicated that the GPR141-NME8 locus had a strong genetic effect on the susceptibility to generalized periodontitis in Japanese individuals with a history of smoking. In conclusion, this study identified 2 suggestive loci for periodontitis in a Japanese population. This study should contribute to a further understanding of genetic factors for enhanced susceptibility to periodontitis.
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Affiliation(s)
- S. Shimizu
- Laboratory for Genotyping Development, Center for Integrative Medical Sciences, RIKEN, Yokohama, Japan
- Department of Oral Rehabilitation, Division of Periodontology and Endodontology, School of Dentistry, Health Sciences University of Hokkaido, Tobetsu-cho, Ishikari, Hokkaido, Japan
| | - Y. Momozawa
- Laboratory for Genotyping Development, Center for Integrative Medical Sciences, RIKEN, Yokohama, Japan
| | - A. Takahashi
- Laboratory for Statistical Analysis, Center for Integrative Medical Sciences, RIKEN, Yokohama, Japan
| | - T. Nagasawa
- Research Institute of Personalized Health Sciences, Health Sciences University of Hokkaido, Tobetsu-cho, Ishikari, Hokkaido, Japan
| | - K. Ashikawa
- Laboratory for Genotyping Development, Center for Integrative Medical Sciences, RIKEN, Yokohama, Japan
| | - Y. Terada
- Division of General Dentistry, University Hospital, Health Sciences University of Hokkaido, Ainosato, Sapporo, Hokkaido, Japan
| | - Y. Izumi
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - H. Kobayashi
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - M. Tsuji
- Division of Internal Medicine, University Hospital, Health Sciences University of Hokkaido, Ainosato, Sapporo, Hokkaido, Japan
| | - M. Kubo
- Laboratory for Genotyping Development, Center for Integrative Medical Sciences, RIKEN, Yokohama, Japan
| | - Y. Furuichi
- Department of Oral Rehabilitation, Division of Periodontology and Endodontology, School of Dentistry, Health Sciences University of Hokkaido, Tobetsu-cho, Ishikari, Hokkaido, Japan
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Mukai H, Yoshino T, Osera S, Sasaki M, Shimizu C, Yonemori K, Koudaira M, Tanabe Y, Matsuda N, Mizutani N, Mori Y, Hashigaki S, Nagasawa T, Umeyama Y, Randolph S, Tamura K. Safety, Pharmacokinetics (Pk) and Efficacy of Cyclin-Dependent Kinase (Cdk) 4 and 6 Inhibitor, Palbociclib (Pd-0332991): Results from a Phase 1 Study in Japanese Patients (Pts). Ann Oncol 2014. [DOI: 10.1093/annonc/mdu331.21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Nakatsuka Y, Nagasawa T, Yumoto Y, Nakazawa F, Furuichi Y. Inhibitory effects of sword bean extract on alveolar bone resorption induced in rats by Porphyromonas gingivalis infection. J Periodontal Res 2014; 49:801-9. [PMID: 24494651 DOI: 10.1111/jre.12166] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/13/2013] [Indexed: 12/01/2022]
Abstract
BACKGROUND The domesticated legume, Canavalia gladiata (commonly called the sword bean), is known to contain canavanine. The fruit is used in Chinese and Japanese herbal medicine for treating the discharge of pus, but its pharmacological mechanisms are still unclear. OBJECTIVES This study examined the effect of sword bean extract (SBE) on (i) oral bacteria and human oral epithelial cells in vitro, and (ii) the initiation and progression of experimental Porphyromonas gingivalis-induced alveolar bone resorption in rats. MATERIAL AND METHODS A high-performance liquid chromatography/ultraviolet method was applied to quantitate canavanine in SBE. By assessing oral bacterial growth, we estimated the minimum inhibitory concentration and minimum bactericidal concentration of SBE, canavanine, chlorhexidine gluconate (CHX) solution. The cytotoxicity of SBE, canavanine, CHX, leupeptin and cystatin for KB cells was determined using a trypan blue assay. The effects of SBE, canavanine, leupeptin and cystatin on Arg-gingipain (Rgp) and Lys-gingipain (Kgp) were evaluated by colorimetric assay using synthetic substrates. To examine its effects on P. gingivalis-associated periodontal tissue breakdown, SBE was orally administered to P. gingivalis-infected rats. RESULT Sword bean extract contained 6.4% canavanine. SBE and canavanine inhibited the growth of P. gingivalis and Fusobacterium nucleatum. The cytotoxicity of SBE, canavanine and cystatin on KB cells was significantly lower than that of CHX. Inhibition of Rgp with SBE was comparable to that with leupeptin, a known Rgp inhibitor, and inhibition of Kgp with SBE was significantly higher than that with leupeptin at 500 μg/mL ( p < 0.05). P. gingivalis-induced alveolar bone resorption was significantly suppressed by administration of SBE, with bone levels remaining comparable to non-infected animals ( p < 0.05). CONCLUSION The present study suggests that SBE might be effective against P. gingivalis-associated alveolar bone resorption.
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Affiliation(s)
- Y Nakatsuka
- Division of Periodontology and Endodontology, Department of Oral Rehabilitation, School of Dentistry, Health Sciences University of Hokkaido, Hokkaido, Japan
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Kudo C, Naruishi K, Maeda H, Abiko Y, Hino T, Iwata M, Mitsuhashi C, Murakami S, Nagasawa T, Nagata T, Yoneda S, Nomura Y, Noguchi T, Numabe Y, Ogata Y, Sato T, Shimauchi H, Yamazaki K, Yoshimura A, Takashiba S. Assessment of the Plasma/Serum IgG Test to Screen for Periodontitis. J Dent Res 2012; 91:1190-5. [DOI: 10.1177/0022034512461796] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Chronic periodontitis is a silent infectious disease prevalent worldwide and affects lifestyle-related diseases. Therefore, efficient screening of patients is essential for general health. This study was performed to evaluate prospectively the diagnostic utility of a blood IgG antibody titer test against periodontal pathogens. Oral examination was performed, and IgG titers against periodontal pathogens were measured by ELISA in 1,387 individuals. The cut-off value of the IgG titer was determined in receiver operating characteristic curve analysis, and changes in periodontal clinical parameters and IgG titers by periodontal treatment were evaluated. The relationships between IgG titers and severity of periodontitis were analyzed. The best cut-off value of IgG titer against Porphyromonas gingivalis for screening periodontitis was 1.682. Both clinical parameters and IgG titers decreased significantly under periodontal treatment. IgG titers of periodontitis patients were significantly higher than those of healthy controls, especially in those with sites of probing pocket depth over 4 mm. Multiplied cut-off values were useful to select patients with severe periodontitis. A blood IgG antibody titer test for Porphyromonas gingivalis is useful to screen hitherto chronic periodontitis patients (ClinicalTrials.gov number NCT01658475).
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Affiliation(s)
- C. Kudo
- Department of Periodontics and Endodontics, Okayama University Hospital, Okayama, Japan
| | - K. Naruishi
- Department of Periodontics and Endodontics, Okayama University Hospital, Okayama, Japan
- currently, Division of Endodontology, Iwate Medical University, Department of Conservative Dentistry and Oral Rehabilitation, Iwate, Japan
| | - H. Maeda
- Department of Pathophysiology - Periodontal Science, Okayama, University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Y. Abiko
- Department of Biochemistry and Molecular Biology, Nihon University School of Dentistry at Matsudo, Chiba, Japan
| | - T. Hino
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical Sciences, Hiroshima, Japan
| | - M. Iwata
- Toyota Motor Corporation, Tokyo/Aichi, Japan
| | | | - S. Murakami
- Department of Periodontology, Division of Oral Biology and Disease Control, Osaka University Graduate School of Dentistry, Osaka, Japan
| | - T. Nagasawa
- Department of Hard Tissue Engineering, Tokyo Medical and Dental University Graduate School, Tokyo, Japan
- currently, Department of Oral Rehabilitation, Division of Periodontology and Endodontology, School of Dentistry, Health Sciences University of Hokkaido, Hokkaido, Japan
| | - T. Nagata
- Department of Periodontology and Endodontology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - S. Yoneda
- Department of Periodontology and Endodontology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - Y. Nomura
- Department of Translational Research, School of Dental Medicine, Tsurumi University, Kanagawa, Japan
| | - T. Noguchi
- Department of Periodontology, School of Dentistry, Aichi-Gakuin University, Aichi, Japan
| | - Y. Numabe
- Department of Periodontology, School of Life Dentistry at Tokyo, Nippon Dental University, Tokyo, Japan
| | - Y. Ogata
- Department of Periodontology, Nihon University School of Dentistry at Matsudo, Chiba, Japan
| | - T. Sato
- Department of Oral Health, School of Life Dentistry at Tokyo, Nippon Dental University, Tokyo, Japan
| | - H. Shimauchi
- Department of Oral Biology, Division of Periodontology and Endodontology, Tohoku University Graduate School of Dentistry, Miyagi, Japan
| | - K. Yamazaki
- Laboratory of Periodontology and Immunology, Department of Oral Health and Welfare, Niigata University Faculty of Dentistry, Niigata, Japan
| | - A. Yoshimura
- Department of Periodontology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - S. Takashiba
- Department of Pathophysiology - Periodontal Science, Okayama, University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
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Hamazaki T, Nagasawa T, Hamazaki K, Itomura M. Inhibitory effect of 5,8,11-eicosatrienoic acid on angiogenesis. Prostaglandins Leukot Essent Fatty Acids 2012; 86:221-4. [PMID: 22521862 DOI: 10.1016/j.plefa.2012.04.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2011] [Revised: 12/21/2011] [Accepted: 04/03/2012] [Indexed: 10/28/2022]
Abstract
INTRODUCTION Cartilage contains high levels of n-9 eicosatrienoic acid (20:3n-9) but no blood vessels. 20:3n-9 might inhibit angiogenesis. MATERIALS AND METHODS Angiogenesis was measured in human umbilical vein endothelial cells and diploid fibroblasts. Co-culture was performed with vascular endothelial growth factor-A (VEGF-A, 10 ng/mL) and fatty acids (0.1-10 μmol/L). After 10 days of incubation and immunostaining for endothelial cells, vessel areas were calculated with image analyser software. RESULTS Addition of 20:3n-9 and n-3 eicosatrienoic acid (20:3n-3) dose dependently inhibited VEGF-A-stimulated angiogenesis (more than the positive control suramin). Arachidonic, eicosapentaenoic, dihomo-γ-linolenic (20:3n-6) and oleic acids did not affect VEGF-A-stimulated angiogenesis even at 10 μmol/L. Arachidonic and dihomo-γ-linolenic acids enhanced angiogenesis without VEGF-A. DISCUSSION AND CONCLUSIONS We suggest that the presence of 20:3n-9 in cartilage may be related to its vessel-free status and that 20:3n-9 may be useful for the treatment of disorders with excessive vasculature. ACKNOWLEDGEMENTS This work was partly supported by Polyene Project, Inc.
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Affiliation(s)
- T Hamazaki
- Department of Clinical Sciences, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama City, Toyama, Japan.
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Mitarai S, Okumura M, Toyota E, Yoshiyama T, Aono A, Sejimo A, Azuma Y, Sugahara K, Nagasawa T, Nagayama N, Yamane A, Yano R, Kokuto H, Morimoto K, Ueyama M, Kubota M, Yi R, Ogata H, Kudoh S, Mori T. Evaluation of a simple loop-mediated isothermal amplification test kit for the diagnosis of tuberculosis. Int J Tuberc Lung Dis 2011; 15:1211-7, i. [DOI: 10.5588/ijtld.10.0629] [Citation(s) in RCA: 87] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Affiliation(s)
- S. Mitarai
- Department of Mycobacterium Reference and Research, Bacteriology Division, Research Institute of Tuberculosis, Japan Anti-Tuberculosis Association, Tokyo, Japan
| | - M. Okumura
- Department of Respiratory and Internal Medicine, Double-Barred Cross Hospital, Japan Anti-Tuberculosis Association, Tokyo, Japan
| | - E. Toyota
- Department of Respiratory and Internal Medicine, National Hospital Organisation, Tokyo Hospital, Tokyo, Japan
| | - T. Yoshiyama
- Department of Respiratory and Internal Medicine, Double-Barred Cross Hospital, Japan Anti-Tuberculosis Association, Tokyo, Japan
| | - A. Aono
- Microbiology Laboratory, Double-Barred Cross Hospital, Japan Anti-Tuberculosis Association, Tokyo, Japan
| | - A. Sejimo
- Microbiology Laboratory, National Hospital Organisation, Tokyo Hospital, Tokyo, Japan
| | - Y. Azuma
- Microbiology Laboratory, Double-Barred Cross Hospital, Japan Anti-Tuberculosis Association, Tokyo, Japan
| | - K. Sugahara
- Microbiology Laboratory, National Hospital Organisation, Tokyo Hospital, Tokyo, Japan
| | - T. Nagasawa
- Microbiology Laboratory, National Hospital Organisation, Tokyo Hospital, Tokyo, Japan
| | - N. Nagayama
- Department of Respiratory and Internal Medicine, National Hospital Organisation, Tokyo Hospital, Tokyo, Japan
| | - A. Yamane
- Department of Respiratory and Internal Medicine, National Hospital Organisation, Tokyo Hospital, Tokyo, Japan
| | - R. Yano
- Department of Respiratory and Internal Medicine, Double-Barred Cross Hospital, Japan Anti-Tuberculosis Association, Tokyo, Japan
| | - H. Kokuto
- Department of Respiratory and Internal Medicine, Double-Barred Cross Hospital, Japan Anti-Tuberculosis Association, Tokyo, Japan
| | - K. Morimoto
- Department of Respiratory and Internal Medicine, Double-Barred Cross Hospital, Japan Anti-Tuberculosis Association, Tokyo, Japan
| | - M. Ueyama
- Department of Respiratory and Internal Medicine, Double-Barred Cross Hospital, Japan Anti-Tuberculosis Association, Tokyo, Japan
| | - M. Kubota
- Department of Respiratory and Internal Medicine, Double-Barred Cross Hospital, Japan Anti-Tuberculosis Association, Tokyo, Japan
| | - R. Yi
- Department of Respiratory and Internal Medicine, Double-Barred Cross Hospital, Japan Anti-Tuberculosis Association, Tokyo, Japan
| | - H. Ogata
- Department of Respiratory and Internal Medicine, Double-Barred Cross Hospital, Japan Anti-Tuberculosis Association, Tokyo, Japan
| | - S. Kudoh
- Department of Respiratory and Internal Medicine, Double-Barred Cross Hospital, Japan Anti-Tuberculosis Association, Tokyo, Japan
| | - T. Mori
- Department of Mycobacterium Reference and Research, Bacteriology Division, Research Institute of Tuberculosis, Japan Anti-Tuberculosis Association, Tokyo, Japan
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Tamura T, Mitsumori K, Muto S, Kasahara H, Kobayashi S, Okuhara Y, Hayashi M, Nagasawa T, Onozato T, Kuroda J. Fifty-two week chronic toxicity of enzymatically decomposed rutin in Wistar rats. Food Chem Toxicol 2010; 48:2312-8. [DOI: 10.1016/j.fct.2010.05.065] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2009] [Revised: 04/30/2010] [Accepted: 05/24/2010] [Indexed: 10/19/2022]
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Mathew CD, Nagasawa T, Kobayashi M, Yamada H. Nitrilase-Catalyzed Production of Nicotinic Acid from 3-Cyanopyridine in Rhodococcus rhodochrous J1. Appl Environ Microbiol 2010; 54:1030-2. [PMID: 16347598 PMCID: PMC202591 DOI: 10.1128/aem.54.4.1030-1032.1988] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The nitrilase which occurs abundantly in cells of Rhodococcus rhodochrous J1 catalyzes the direct hydrolysis of 3-cyanopyridine to nicotinic acid without forming nicotinamide. By using resting cells, the reaction conditions for nicotinic acid production were optimized. Under the optimum conditions, 100% of the added 3-cyanopyridine could be converted to nicotinic acid, the highest yield achieved being 172 mg of nicotinic acid per 1.0 ml of reaction mixture containing 2.89 mg (dry weight) of cells in 26 h.
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Affiliation(s)
- C D Mathew
- Department of Agricultural Chemistry, Kyoto University, Kitashirakawa, Oiwake-cho, Sakyo-ku, Kyoto 606, Japan
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22
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Maeda K, Noguchi Y, Matsumoto F, Nagasawa T. Quantitative fetal heart rate evaluation without pattern classification: FHR score and artificial neural network analysis. Network 2010; 21:127-141. [PMID: 21138362 DOI: 10.3109/0954898x.2010.529396] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Affiliation(s)
- K Maeda
- Department of Obstetrics & Gynecology, Seirei Hospitals, Hamamatsu, Japan.
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23
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Okada M, Kita Y, Nakajima T, Kanamaru N, Hashimoto S, Nishida Y, Nakatani H, Takao K, Kishigami C, Nishimatsu S, Sekine Y, Inoue Y, Nagasawa T, Kaneda Y, Yoshida S, Matsumoto M, Paul S, Tan EV, Cruz ECD, N McMurray D, Sakatani M. A Novel Therapeutic and Prophylactic Vaccine (HVJ-Envelope / Hsp65 DNA + IL-12 DNA) against Tuberculosis Using the Cynomolgus Monkey Model. Procedia Vaccinol 2010; 2:34-39. [PMID: 32288910 PMCID: PMC7129898 DOI: 10.1016/j.provac.2010.03.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
We have developed a novel tuberculosis (TB) vaccine; a combination of the DNA vaccines expressing mycobacterial heat shock protein 65 (HSP65) and interleukin 12 (IL-12) delivered by the hemagglutinating virus of Japan (HVJ)-envelope and -liposome (HSP65 + IL-12/HVJ). An IL-12 expression vector (IL-12DNA) encoding single-chain IL-12 proteins comprised of p40 and p35 subunits were constructed. This vaccine provided remarkable protective efficacy in mouse and guinea pig models compared to the BCG vaccine on the basis of C.F.U of number of TB, survival, an induction of the CD8 positive CTL activity and improvement of the histopathological tuberculosis lesions. This vaccine also provided therapeutic efficacy against multi-drug resistant TB (MDR-TB) and extremely drug resistant TB (XDR-TB) (prolongation of survival time and the decrease in the number of TB in the lung) in murine models. Furthermore, we extended our studies to a cynomolgus monkey model, which is currently the best animal model of human tuberculosis. This novel vaccine provided a higher level of the protective efficacy than BCG based upon the assessment of mortality, the ESR, body weight, chest X-ray findings and immune responses. All monkeys in the control group (saline) died within 8 months, while 50% of monkeys in the HSP65+hIL-12/HVJ group survived more than 14 months post-infection (the termination period of the experiment). Furthermore, the BCG priming and HSP65 + IL-12/HVJ vaccine (booster) by the priming-booster method showed a synergistic effect in the TB-infected cynomolgus monkey (100% survival). In contrast, 33% of monkeys from BCG Tokyo alone group were alive (33% survival). Furthermore, this vaccine exerted therapeutic efficacy (100% survival) and augmentation of immune responses in the TB-infected monkeys. These data indicate that our novel DNA vaccine might be useful against Mycobacterium tuberculosis including XDR-TB and MDR-TB for human therapeutic clinical trials.
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Affiliation(s)
- M Okada
- Clinical Research Center, National Hospital Organization Kinki-chuo Chest Medical Center, 1180 Nagasone, Kitaku, Sakai, Osaka 591-8555, Japan
| | - Y Kita
- Clinical Research Center, National Hospital Organization Kinki-chuo Chest Medical Center, 1180 Nagasone, Kitaku, Sakai, Osaka 591-8555, Japan
| | - T Nakajima
- Ikeda Laboratory, GenomIdea Inc.,1-8-31, Midorigaoka, Ikeda, Osaka 530-0043, Japan
| | - N Kanamaru
- Clinical Research Center, National Hospital Organization Kinki-chuo Chest Medical Center, 1180 Nagasone, Kitaku, Sakai, Osaka 591-8555, Japan
| | - S Hashimoto
- Clinical Research Center, National Hospital Organization Kinki-chuo Chest Medical Center, 1180 Nagasone, Kitaku, Sakai, Osaka 591-8555, Japan
| | - Y Nishida
- Clinical Research Center, National Hospital Organization Kinki-chuo Chest Medical Center, 1180 Nagasone, Kitaku, Sakai, Osaka 591-8555, Japan
| | - H Nakatani
- Clinical Research Center, National Hospital Organization Kinki-chuo Chest Medical Center, 1180 Nagasone, Kitaku, Sakai, Osaka 591-8555, Japan
| | - K Takao
- Clinical Research Center, National Hospital Organization Kinki-chuo Chest Medical Center, 1180 Nagasone, Kitaku, Sakai, Osaka 591-8555, Japan
| | - C Kishigami
- Clinical Research Center, National Hospital Organization Kinki-chuo Chest Medical Center, 1180 Nagasone, Kitaku, Sakai, Osaka 591-8555, Japan
| | - S Nishimatsu
- Clinical Research Center, National Hospital Organization Kinki-chuo Chest Medical Center, 1180 Nagasone, Kitaku, Sakai, Osaka 591-8555, Japan
| | - Y Sekine
- Clinical Research Center, National Hospital Organization Kinki-chuo Chest Medical Center, 1180 Nagasone, Kitaku, Sakai, Osaka 591-8555, Japan
| | - Y Inoue
- Clinical Research Center, National Hospital Organization Kinki-chuo Chest Medical Center, 1180 Nagasone, Kitaku, Sakai, Osaka 591-8555, Japan
| | - T Nagasawa
- Ikeda Laboratory, GenomIdea Inc.,1-8-31, Midorigaoka, Ikeda, Osaka 530-0043, Japan
| | - Y Kaneda
- Division of Gene Therapy Science, Graduate School of Medicine, Osaka University, 2-2, Yamadaoka, Suita, Osaka 565-0871, Japan
| | - S Yoshida
- Department of Medical Zoology, Jichi-Med.Sch, 3311-1, Yakushiji, Minamikawachi-machi, Tochigi 329-0498, Japan
| | - M Matsumoto
- Otsuka Pharmaceutical Co. Ltd., 463-10 Kagasuno, Kawauchi-cho, Tokushima 771-0192, Japan
| | - Saunderson Paul
- Leonard Wood Memorial, Jagobiao, Mandaue City, Cebu 6000, Philippines
| | - E V Tan
- Leonard Wood Memorial, Jagobiao, Mandaue City, Cebu 6000, Philippines
| | - E C Dela Cruz
- Leonard Wood Memorial, Jagobiao, Mandaue City, Cebu 6000, Philippines
| | - D N McMurray
- Texas A & M University, System Health Science Center, College of Medicine, College Station, TX 77843-1114, USA
| | - M Sakatani
- Clinical Research Center, National Hospital Organization Kinki-chuo Chest Medical Center, 1180 Nagasone, Kitaku, Sakai, Osaka 591-8555, Japan
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Mizuguchi K, Hoshino H, Nagasawa T, Kubota M. Extracorporeal membrane oxygenation in a patient with propionic acidaemia: a therapeutic option for cardiac failure. J Inherit Metab Dis 2009; 32 Suppl 1:S37-40. [PMID: 19408133 DOI: 10.1007/s10545-009-1029-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2008] [Revised: 03/23/2009] [Accepted: 03/24/2009] [Indexed: 11/30/2022]
Abstract
We report a Japanese girl affected with a neonatal-onset form of propionic acidaemia (PA). She developed severe metabolic crisis after dehydration at 2 years of age. Bradycardia with complete atrioventricular block responded to haemodiafiltration, but severe cardiac failure was refractory to inotropic treatment. She was diagnosed with acute cardiac dysfunction caused by PA-induced metabolic crisis. Extracorporeal membrane oxygenation (ECMO), a technique for providing mechanical circulatory support, was required. This is the first case report of a PA patient who recovered from a life-threatening metabolic crisis with cardiac failure by ECMO. Cardiac failure may be a cause of death, but it is occasionally an under-recognized complication. Mitochondrial dysfunction in the myocardium due to propionyl-CoA could contribute to the pathomechanism of cardiac complications of PA. We believe that ECMO should be attempted in PA patients with cardiac failure, in addition to haemodiafiltration and other therapeutic measures, because doing so may lead to the recovery of cardiac dysfunction, as was evident in our patient. In conclusion, prompt investigations and management of cardiac complications should be performed immediately during PA-induced metabolic crises.
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Affiliation(s)
- K Mizuguchi
- Division of Child Neurology, National Center of Child Health and Development, Okura 2-10-1, Setagaya-ku, Tokyo, 157-8504, Japan.
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Suda T, Nagasawa T, Wara-aswapati N, Kobayashi H, Iwasaki K, Yashiro R, Hormdee D, Nitta H, Ishikawa I, Izumi Y. Regulatory roles of β-catenin and AP-1 on osteoprotegerin production in interleukin-1α-stimulated periodontal ligament cells. ACTA ACUST UNITED AC 2009; 24:384-9. [DOI: 10.1111/j.1399-302x.2009.00529.x] [Citation(s) in RCA: 12] [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: 01/24/2023]
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Mitsukura K, Shimizu M, Matsushita K, Yoshida T, Nagasawa T. Characteristics and function of Alcaligenes sp. NBRC 14130 esterase catalysing the stereo-selective hydrolysis of ethyl chrysanthemate. J Appl Microbiol 2009; 108:1263-70. [PMID: 19778353 DOI: 10.1111/j.1365-2672.2009.04522.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
AIMS Alcaligenes sp. NBRC 14130 was found as a strain hydrolysing a mixture of (+/-)-trans- and (+/-)-cis ethyl chrysanthemates to (1R,3R)-(+)-trans-chrysanthemic acid. The Alcaligenes cells also have hydrolytic activity for 6-aminohexanoate-cyclic dimer (6-AHCD, 1,8-diazacyclotetradecane-2,9-dione). The correlation of function on the enzyme from the Alcaligenes strain with hydrolysis activities for both ethyl chrysanthemate and 6-AHCD was demonstrated. METHODS AND RESULTS The esterase was purified to homogeneity. The purified esterase hydrolysed 20 mmol l(-1) ester including the four stereoisomers to the corresponding (+)-trans acid with a 37% molar conversion of ethyl (+)-trans chrysanthemate. The esterase showed high hydrolytic activity for various short-chain fatty acid esters, n-hexane amide and 6-AHCD. The amino acid sequence of the Alcaligenes esterase was identical to that of Arthrobacter 6-AHCD hydrolase (EC 3.5.2.12) and similar to that of fatty acid amide hydrolase (EC 3.5.1.4) from Rattus norvegicus, having both serine and lysine residues of the catalytic site and the consensus motif Gly-X-Ser-X-Gly. CONCLUSION The stereo-selective hydrolytic activity was found in Alcaligenes sp. NBRC14130 by screening of ethyl chrysanthemate-hydrolysing activity in micro-organisms, and the purified esterase also acted on fatty acid esters and amides. SIGNIFICANCE AND IMPACT OF THE STUDY This study has demonstrated that there are great differences in the enzymatic properties, amino acid sequence and catalytic motif of esterases in both Alcaligenes and Arthrobacter globiformis with excellent stereo-selectivity for (+)-trans-ethyl chrysanthemate, but the amino acid sequence of Alcaligenes esterase is identical to that of Arthrobacter 6-AHCD hydrolase.
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Affiliation(s)
- K Mitsukura
- Department of Biomolecular Science, Faculty of Engineering, Gifu University, Gifu, Japan.
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27
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Katagiri S, Nitta H, Nagasawa T, Uchimura I, Izumiyama H, Inagaki K, Kikuchi T, Noguchi T, Kanazawa M, Matsuo A, Chiba H, Nakamura N, Kanamura N, Inoue S, Ishikawa I, Izumi Y. Multi-center intervention study on glycohemoglobin (HbA1c) and serum, high-sensitivity CRP (hs-CRP) after local anti-infectious periodontal treatment in type 2 diabetic patients with periodontal disease. Diabetes Res Clin Pract 2009; 83:308-15. [PMID: 19168253 DOI: 10.1016/j.diabres.2008.10.016] [Citation(s) in RCA: 77] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2008] [Revised: 10/14/2008] [Accepted: 10/21/2008] [Indexed: 01/03/2023]
Abstract
The purpose of this study was to examine whether periodontal treatment incorporating topical antibiotic therapy affects on levels of glycohemoglobin (HbA1c) and serum high-sensitivity C-reactive protein (hs-CRP) in type 2 diabetic patients with periodontal disease, and to explore the relationship between CRP and glycemic control. The whole intervention group (n=32), which underwent anti-infectious periodontal treatment, showed only transient reduction in HbA1c levels without any change in hs-CRP, while the control group (n=17) did not show any changes in HbA1c or hs-CRP. Multiple regression analysis of all subjects revealed that BMI and change in hs-CRP correlated significantly with the reduction of HbA1c at 6 months after the periodontal treatment. Based on the results of multiple regression analysis, the intervention group was subdivided into two groups: those in which hs-CRP levels decreased (CRP-D group), and those in which hs-CRP levels unchanged or increased (CRP-N group) (n=16, respectively), and re-analysis was conducted based upon these subgroups. In the CRP-D subgroup, HbA1c was significantly reduced at the end of the study, but it did not decrease in the CRP-N subgroup. The decrease of HbA1c in the CRP-D subgroup following periodontal treatment was significantly greater than that in the CRP-N subgroup. BMI of each group remained unchanged in this study at the end of the study. Thus, the results suggested that periodontal treatment with topical antibiotics improves HbA1c through reduction of CRP, which may relate to amelioration of insulin resistance, in type 2 diabetic patients with periodontal disease.
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Affiliation(s)
- S Katagiri
- Periodontology, Department of Hard Tissue Engineering, Tokyo Medical and Dental University Graduate School, Tokyo, Japan
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Kozuma Y, Yuki S, Ninomiya H, Nagasawa T, Kojima H. Caspase activation is involved in early megakaryocyte differentiation but not in platelet production from megakaryocytes. Leukemia 2009; 23:1080-6. [DOI: 10.1038/leu.2009.7] [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: 11/09/2022]
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Morita K, Tamate T, Sugimoto Y, Tago Y, Watanabe T, Konaka H, Sato M, Miyauchi Y, Ohkuma K, Nagasawa T. Latitudinal variation in egg size and number in anadromous masu salmon Oncorhynchus masou. J Fish Biol 2009; 74:699-705. [PMID: 20735590 DOI: 10.1111/j.1095-8649.2008.02150.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Latitudinal variation in egg size and number in anadromous masu salmon Oncorhynchus masou was examined. Relatively greater variation in egg size occurred among rivers than among females within rivers or within females. Egg size was generally greater and egg number generally lower at more northerly latitudes.
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Affiliation(s)
- K Morita
- Hokkaido National Fisheries Research Institute, Kushiro, Japan.
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Nagata T, Kikuzawa Y, Nagasawa T, Allakhverdiev SI. Single-Molecular Quinone Pools: A Synthetic Model of Biochemical Energy Transducer. ACTA ACUST UNITED AC 2009. [DOI: 10.14723/tmrsj.34.505] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- T. Nagata
- Institute for Molecular Science (IMS)
- Department of Structural Molecular Science, the Graduate University for Advanced Studies
| | - Y. Kikuzawa
- Institute for Molecular Science (IMS)
- Department of Structural Molecular Science, the Graduate University for Advanced Studies
| | - T. Nagasawa
- Institute for Molecular Science (IMS)
- Department of Structural Molecular Science, the Graduate University for Advanced Studies
| | - Suleyman I. Allakhverdiev
- Institute for Molecular Science (IMS)
- Institute of Basic Biological Problems, Russian Academy of Sciences (RAS)
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Wang D, Nagasawa T, Chen Y, Ushida Y, Kobayashi H, Takeuchi Y, Umeda M, Izumi Y. Molecular mimicry of Aggregatibacter actinomycetemcomitans with beta2 glycoprotein I. ACTA ACUST UNITED AC 2008; 23:401-5. [PMID: 18793363 DOI: 10.1111/j.1399-302x.2008.00442.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
INTRODUCTION beta2-Glycoprotein I (beta 2GPI) is important in the suppression of coagulation, and antibodies against TLRVYK peptides on the beta 2GPI molecule are related to thrombosis. According to the Swiss-Prot database, Aggregatibacter actinomycetemcomitans leukotoxin c has sequences (SIRVYK) that are homologous to the TLRVYK peptides. The aim of this study was to investigate the effects of A. actinomycetemcomitans infection on the antibody response against SIRVYK peptides in patients with periodontitis. METHODS Serum immunoglobulin G (IgG) antibody and IgG subclass antibody titers against SIRVYK or TLRVYK peptides were measured by enzyme-linked immunosorbent assay in 46 patients with aggressive periodontitis (eight with localized disease, 38 with generalized disease), 28 patients with chronic periodontitis, and 20 periodontally healthy subjects. The presence of A. actinomycetemcomitans in plaque and saliva samples was determined using polymerase chain reaction. RESULTS The level of anti-SIRVYK antibodies was significantly higher in patients who were A. actinomycetemcomitans-positive than in A. actinomycetemcomitans-negative patients (P < 0.05) in the chronic periodontitis group. A similar trend was found in the antibody response to TLRVYK peptide; however, no statistically significant difference was seen between A. actinomycetemcomitans-positive and -negative patients. The A. actinomycetemcomitans-positive patients displayed significantly higher levels of anti-SIRVYK IgG2 and IgG3 antibodies than A. actinomycetemcomitans-negative patients (P < 0.05 and P < 0.05, respectively). The level of IgG2 was highest among the four IgG subclasses and it predominantly increased in patients who were A. actinomycetemcomitans-positive. Anti-TLRVYK antibody levels were significantly correlated with anti-SIRVYK IgG antibody levels. CONCLUSION The results suggest that A. actinomycetemcomitans infection may elicit anti-SIRVYK IgG antibodies and modify the anti-TLRVYK antibody response in patients with periodontitis by molecular mimicry with beta2GPI.
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Affiliation(s)
- D Wang
- Department of Hard Tissue Engineering, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
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Sakaguchi M, Takezawa M, Nakazawa R, Nozawa K, Kusakawa T, Nagasawa T, Sugahara Y, Kawakita M. Role of Disulphide Bonds in a Thermophilic Serine Protease Aqualysin I from Thermus aquaticus YT-1. J Biochem 2008; 143:625-32. [DOI: 10.1093/jb/mvn007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Abstract
Erythropoietin gene expression is stimulated by hypoxia-inducible factor 1 and inhibited by GATA. Thus, drugs that attenuate the action of GATA and/or potentiate the action of HIF-1 may increase Epo production and hemoglobin concentration. The effects of such drugs on endurance performance and the potential mechanisms by which they may exert effects are unclear. In Hep3B cells, we showed that K-11706 inhibits GATA binding activity, but enhances HIF-1 binding activity. However, the expression levels of GATA and HIF-1 protein were not changed by the addition of K-11706. We investigated the effects of K-11706 on Epo and Hb concentrations, hematocrit and endurance performance of mice (total number of mice = 40). K-11706 was dissolved in polyethylene glycol and administered via oral tube feeding to mice for either five or eight days. Endurance performance was assessed using a treadmill. Muscle fibers from the quadriceps muscles of mice were stained with ATPase. Administration of 3 mg/kg K-11706 for five or eight days significantly increased erythropoietin concentrations, hemoglobin concentrations, hematocrit and endurance performance, but the diameters of cross-sections and ratios of type I, IIA and IIB muscle fibers were not affected.
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Affiliation(s)
- S Imagawa
- Doctoral Program of Sports Medicine, GSCHS, University of Tsukuba, Tsukuba, Japan.
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Chen YW, Umeda M, Nagasawa T, Takeuchi Y, Huang Y, Inoue Y, Iwai T, Izumi Y, Ishikawa I. Periodontitis may increase the risk of peripheral arterial disease. Eur J Vasc Endovasc Surg 2007; 35:153-8. [PMID: 17964192 DOI: 10.1016/j.ejvs.2007.08.016] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2007] [Accepted: 08/26/2007] [Indexed: 12/23/2022]
Abstract
OBJECTIVES The aim of this case control study was to evaluate whether periodontitis was associated with peripheral arterial disease (PAD). SUBJECTS AND METHODS Twenty-five patients diagnosed with aorto-iliac and/or femoro-popliteal occlusive disease and thirty-two generally healthy control subjects were enrolled in this study. Polymerase chain reaction (PCR) was used to identify Porphyromonas gingivalis, Treponema denticola, Actinobacillus actinomycetemcomitans, Prevotella intermedia, Cytomegalovirus (CMV), Chlamydia pneumoniae, and Helicobacter pylori in tissue specimens taken from the anastomotic site of distal bypasses. Periodontal status was evaluated; serum IgG titres against the four listed bacteria were measured. RESULTS Periodontopathic bacteria were detected in 13/25 (52%) atherosclerotic specimens. CMV or C. pneumoniae was detected in 1/25 (4%) specimens; H. pylori was not detected from any of these specimens. Fontaine grade III or IV patients showed higher detection frequency of P. gingivalis than Fontaine grade II patients (57.1% vs 22.2%, P=0.09). After adjusting for age, gender, diabetes and smoking, periodontitis increased 5-fold the risk of having PAD (OR 5.45). There were preliminary indications that periodontitis was associated with increased serum IL-6 and TNF-alpha concentrations. CONCLUSIONS This study suggests that periodontitis may be associated with an increased risk of PAD. This association could result from the increased concentration of serum inflammatory cytokines in those with periodontitis.
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Affiliation(s)
- Y-W Chen
- Periodontology, Department of Hard Tissue Engineering, Graduate School, Tokyo Medical and Dental University, Yushima, Tokyo, Japan.
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Higashima M, Tsukada T, Nagasawa T, Komai Y, Okamoto T, Koshino Y. Event-related desynchronization of alpha activity and P300 during performance of an auditory oddball task for patients with schizophrenia. Clin Neurophysiol 2007. [DOI: 10.1016/j.clinph.2007.05.054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Kiji M, Nagasawa T, Hormdee D, Yashiro R, Kobayashi H, Noguchi K, Nitta H, Izumi Y, Ishikawa I. Internal prostaglandin synthesis augments osteoprotegerin production in human gingival fibroblasts stimulated by lipopolysaccharide. Clin Exp Immunol 2007; 149:327-34. [PMID: 17550374 PMCID: PMC1941953 DOI: 10.1111/j.1365-2249.2007.03414.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [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] [Accepted: 04/13/2007] [Indexed: 11/30/2022] Open
Abstract
Periodontitis is an inflammatory bone disease caused by Gram-negative anaerobic bacteria. Osteoclast differentiation is regulated by the balance between receptor activator of nuclear factor kappa B ligand (RANKL) and osteoprotegerin (OPG). The purpose of this study was to examine the mechanism of OPG production in human gingival fibroblasts (HGF) stimulated by lipopolysaccharide (LPS) from periodontopathic bacteria. The expressions of Toll-like receptor 2 (TLR-2) and TLR-4 in HGF were examined using flow-cytometry. HGF were stimulated with whole cell extracts or LPS from Actinobacillus actinomycetemcomitans and Porphyromonas gingivalis with or without polymyxin B, a LPS inhibitor. In addition, HGF were stimulated with LPS, prostaglandin E(2) (PGE(2)), various agonists of PGE receptors (EP1, EP2, EP3 and EP4 agonists) with or without indomethacin (IND), a prostaglandin synthesis inhibitor. OPG and PGE(2) production was measured using an enzyme-linked immunosorbent assay (ELISA). HGF expressed both TLR-2 and TLR-4. Both A. actinomycetemcomitans and P. gingivalis LPS augmented OPG expression in HGF. Whole cell extracts from A. actinomycetemcomitans and P. gingivalis augmented OPG production by HGF; the augmentation was suppressed by polymyxin B. IND suppressed OPG production in LPS-stimulated HGF. PGE(2) stimulated HGF to produce OPG. EP1 and EP2 agonists, but not EP3 and EP4 agonists, increased OPG production by HGF. These results suggest that LPS-induced OPG production by HGF is regulated via EP1 and/or EP2 receptors by endogenously generated PGE(2).
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Affiliation(s)
- M Kiji
- Periodontology, Department of Hard Tissue Engineering, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
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Kozuma Y, Kojima H, Yuki S, Suzuki H, Nagasawa T. Continuous expression of Bcl-xL protein during megakaryopoiesis is post-translationally regulated by thrombopoietin-mediated Akt activation, which prevents the cleavage of Bcl-xL. J Thromb Haemost 2007; 5:1274-82. [PMID: 17389006 DOI: 10.1111/j.1538-7836.2007.02546.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
BACKGROUND One of the important biological activities of thrombopoietin (TPO) is to prevent the apoptosis of megakaryocytes. As the antiapoptotic protein Bcl-xL, which has been proven to be indispensable for erythroid differentiation, is also abundantly expressed in megakaryocytes, it is assumed that Bcl-xL plays an important role in megakaryopoiesis. OBJECTIVES We investigated the expression of Bcl-xL during megakaryopoiesis and the underlying regulatory mechanism. METHODS AND RESULTS In stem cell-derived megakaryocytes, expression of Bcl-xL increased in the early and mid-stages of the differentiation. Both in vitro in cell culture and in vivo in an animal model, expression of Bcl-xL protein was maintained until the platelet-producing stage. TPO depletion caused significant decrease in Bcl-xL protein level without affecting its mRNA in both megakaryocytes and TPO-dependent megakaryocytic UT-7/TPO cells, suggesting that Bcl-xL protein level in TPO-dependent cells is post-translationally regulated. In agreement with this finding, we recognized the appearance of a 12-kD fragment of Bcl-xL upon TPO depletion. This cleavage of Bcl-xL was inhibited by a caspase-3-specific inhibitor. Furthermore, pretreatment of UT-7/TPO with a phosphatidylinositol 3-kinase (PI3 K) inhibitor resulted in the cleavage of Bcl-xL even in the presence of TPO. We thus hypothesized that PI3 K inhibits the activation of caspase-3 and consequent cleavage of Bcl-xL. To prove this, we prepared UT-7/TPO cells transfected with constitutively active Akt-1. When TPO was depleted, the transfectant was significantly less liable to caspase-3 activation and Bcl-xL cleavage. CONCLUSIONS Bcl-xL protein is expressed throughout megakaryopoiesis until platelets are produced, and its expression level is at least in part post-translationally regulated through TPO-mediated Akt activation.
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Affiliation(s)
- Y Kozuma
- Division of Hematology, Institute of Clinical Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
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Mitsukura K, Uno T, Yoshida T, Nagasawa T. Microbial asymmetric oxidation of 2-butyl-1,3-propanediol. Appl Microbiol Biotechnol 2007; 76:61-5. [PMID: 17453192 DOI: 10.1007/s00253-007-0974-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2007] [Revised: 03/24/2007] [Accepted: 03/25/2007] [Indexed: 10/23/2022]
Abstract
Microbial asymmetric oxidation of 2-butyl-1,3-propanediol was investigated for an efficient synthesis of S- and R-enantiomers of 2-hydroxymethylhexanoic acid (2-HMHA). From an intensive survey of the stocked bacterial strains, Acetobacter pasteurianus IAM 12073 and Pseudomonas putida IFO 3738 were found to show the highest S- and R-2-HMHA-producing activity, respectively. Under optimized conditions, A. pasteurianus (351 mg dry cell weight) and P. putida (642 mg dry cell weight) cells produced 12.0 g l(-1) S-2-HMHA with 89% enantiomeric excess (e.e.) at 24 h of incubation and 5.1 g l(-1) R-2-HMHA with 94% e.e. at 35 h of incubation from 2-butyl-1,3-propanediol.
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Affiliation(s)
- K Mitsukura
- Department of Biomolecular Science, Faculty of Engineering, Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan
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Machino T, Okoshi Y, Kaneko S, Obara N, Mukai HY, Suzukawa K, Hasegawa Y, Yamashita Y, Mori N, Kojima H, Nagasawa T. Hepatosplenic αβ T-cell lymphoma successfully treated with allogeneic bone marrow transplantation. Bone Marrow Transplant 2007; 39:513-4. [PMID: 17310131 DOI: 10.1038/sj.bmt.1705615] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Uno K, Homma S, Satoh T, Nakanishi K, Abe D, Matsumoto K, Oki A, Tsunoda H, Yamaguchi I, Nagasawa T, Yoshikawa H, Aonuma K. Tissue factor expression as a possible determinant of thromboembolism in ovarian cancer. Br J Cancer 2007; 96:290-5. [PMID: 17211468 PMCID: PMC2359996 DOI: 10.1038/sj.bjc.6603552] [Citation(s) in RCA: 120] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Ovarian cancer, and clear cell carcinoma in particular, reportedly increases the risk of venous thromboembolism (VTE). However, the mechanisms remain unclear. Tissue factor (TF) supposedly represents a major factor in the procoagulant activities of cancer cells. The present study examined the involvement of TF expression in VTE for patients with ovarian cancer. Subjects comprised 32 consecutive patients (mean age 49.8 years) with histologically confirmed ovarian cancer. Presence of VTE was examined using a combination of clinical features, D-dimer levels and venous ultrasonography. Immunohistochemical analysis was used to evaluate TF expression into 4 degrees. Venous thromboembolism was identified in 10 of the 32 patients (31%), including five of the 11 patients with clear cell carcinoma. Tissue factor expression was detected in cancer tissues from 24 patients and displayed significant correlations with VTE development (P=0.0003), D-dimer concentration (P=0.003) and clear cell carcinoma (P<0.05). Multivariate analysis identified TF expression as an independent predictive factor of VTE development (P<0.05). Tissue factor (TF) expression is a possible determinant of VTE development in ovarian cancer. In particular, clear cell carcinoma may produce excessive levels of TF and is more likely to develop VTE.
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Affiliation(s)
- K Uno
- Cardiovascular Division, Institute of Clinical Medicine, Graduate School of Comprehensive Human Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan
| | - S Homma
- Cardiovascular Division, Institute of Clinical Medicine, Graduate School of Comprehensive Human Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan
- Cardiovascular Division, Institute of Clinical Medicine, Graduate School of Comprehensive Human Science, University of Tsukuba, 305-8575 Japan. E-mail:
| | - T Satoh
- Department of Obstetrics and Gynecology, Institute of Clinical Medicine, Graduate School of Comprehensive Human Science, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - K Nakanishi
- Cardiovascular Division, Institute of Clinical Medicine, Graduate School of Comprehensive Human Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan
| | - D Abe
- Cardiovascular Division, Institute of Clinical Medicine, Graduate School of Comprehensive Human Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan
| | - K Matsumoto
- Department of Obstetrics and Gynecology, Institute of Clinical Medicine, Graduate School of Comprehensive Human Science, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - A Oki
- Department of Obstetrics and Gynecology, Institute of Clinical Medicine, Graduate School of Comprehensive Human Science, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - H Tsunoda
- Department of Obstetrics and Gynecology, Institute of Clinical Medicine, Graduate School of Comprehensive Human Science, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - I Yamaguchi
- Cardiovascular Division, Institute of Clinical Medicine, Graduate School of Comprehensive Human Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan
| | - T Nagasawa
- Department of Clinical and Experimental Hematology, Major of Advanced Biomedical Applications, Graduate School of Comprehensive Human Science, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - H Yoshikawa
- Department of Obstetrics and Gynecology, Institute of Clinical Medicine, Graduate School of Comprehensive Human Science, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - K Aonuma
- Cardiovascular Division, Institute of Clinical Medicine, Graduate School of Comprehensive Human Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan
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Abstract
Caramelization of a 1% sucrose solution at 180 degrees C accompanied characteristic changes in pH, Mr, UV-absorbance, and fluorescence values as well as increased reducing power activity after 40-60 min. Similar changes occurred to sucrose heated at 150 degrees C, after 150-240 min. Bioactivity of caramelized sucrose samples was tested for mutagenic activity, using Salmonella typhimurium strains TA-98 and TA-100, respectively, as well as the Saccharomyces D7 yeast strain for mitotic recombination and Chinese hamster ovary cells (CHO) to assess clastogenicity. Caramelized sucrose expressed no mutagenicity in the TA-98 strain, but gave positive (p < 0.05) results with the TA-100, base-pair substitution strain. Similarly, mitotic recombination in the Saccharomyces D7 yeast strain and clastogenic activity in CHO cells were induced when exposed to caramelized sucrose. In the all cases, preincubation with S-9 reduced (p < 0.05) the mutagenic activities of caramelized sucrose. Fractionation of the caramelized sucrose into volatile and nonvolatile compounds was performed and tested for clastogenicity using CHO cells. Volatile components contributed approximately 10% to total clastogenicity, which was enhanced by the presence of S-9. Nonvolatile components recovered, consisting of relatively lower Mr, gave highest (p < 0.05) clastogenic activity, denoting that higher Mr caramel colors are relatively free of this property.
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Affiliation(s)
- David D Kitts
- Food Nutrition and Health, University of British Columbia, Vancouver, BC, Canada.
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Takeuchi Y, Aramaki M, Nagasawa T, Umeda M, Oda S, Ishikawa I. Immunoglobulin G subclass antibody profiles in Porphyromonas gingivalis-associated aggressive and chronic periodontitis patients. ACTA ACUST UNITED AC 2006; 21:314-8. [PMID: 16922931 DOI: 10.1111/j.1399-302x.2006.00296.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND/AIMS The immunoglobulin G (IgG) antibody response is considered to be protective and beneficial for the control of periodontal lesions. This study analysed IgG subclass antibody levels of Porphyromonas gingivalis in patients with both aggressive periodontitis (AgP) and chronic periodontitis (CP). METHODS Subgingival plaque and peripheral blood samples were collected from patients with localized AgP (n = 13), generalized AgP (n = 28) and generalized CP (n = 27) and from 14 periodontally healthy controls. P. gingivalis was identified in subgingival pockets using a polymerase chain reaction. Simultaneously, serum IgG subclass antibody against P. gingivalis whole cells/P. gingivalis fimbriae were measured using enzyme-linked immunosorbent assay. RESULTS P. gingivalis was frequently detected in periodontitis patients. Anti-P. gingivalis whole cell IgG1 was elevated in all P. gingivalis-positive patients in the three periodontitis groups. Although increased anti-P. gingivalis IgG1 was also observed in the bacterium-positive healthy controls, the level was lower than that found in the three periodontitis groups. Levels of IgG1, IgG2, IgG3 and IgG4 to P. gingivalis did not differ among bacterium-positive patients in the three periodontitis groups; a significant increase of IgG2 level was not observed in localized AgP. Anti-fimbriae IgG subclass levels of IgG1, IgG2 and IgG4 did not differ among bacterium-positive subjects in all groups, while the anti-fimbriae IgG3 level in generalized CP was significantly higher than that in localized and generalized AgP. CONCLUSIONS P. gingivalis infection elicited an IgG subclass antibody response in both periodontitis patients and healthy subjects, while higher anti-P. gingivalis IgG1 levels were found in the three periodontitis groups compared with the healthy control group.
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Affiliation(s)
- Y Takeuchi
- Section of Periodontology, Department of Hard Tissue Engineering, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan.
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Kojima H, Moroi M, Jung SM, Goto S, Tamura N, Kozuma Y, Suzukawa K, Nagasawa T. Characterization of a patient with glycoprotein (GP) VI deficiency possessing neither anti-GPVI autoantibody nor genetic aberration. J Thromb Haemost 2006; 4:2433-42. [PMID: 17059472 DOI: 10.1111/j.1538-7836.2006.02173.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND There have been only seven reported cases of glycoprotein (GP) VI deficiency. However, the pathogenesis of this disorder has not been well-elucidated. OBJECTIVES We characterized a novel patient with GPVI deficiency and used these platelets to investigate the role of GPVI in normal hemostasis. PATIENT A 31-year-old female with immune thrombocytopenic purpura who had been suffering from mild bleeding diathesis even after recovery from thrombocytopenia. RESULTS AND CONCLUSION The patient's platelets did not aggregate in response to either convulxin or collagen-related peptide. Immunoblotting revealed complete absence of the GPVI molecule, whereas a significantly reduced but substantial amount of Fc receptor (FcR) gamma-chain was expressed. Platelet stimulation with convulxin did not induce tyrosine-phosphorylation of FcR gamma-chain, indicating a defect in GPVI-mediated signaling. Concerning the underlying pathogenesis, we found normal level of GPVI-mRNA expression, no aberration of the sequence of the entire coding region of GPVI, and presence of degraded GPVI in her plasma. However, no anti-GPVI autoantibody was detected either by the binding assay to GPVI-Fc2 fusion protein or by immunoblotting/immunoprecipitation using the patient's immunoglobulin. We thus consider that either a short-time exposure to anti-GPVI autoantibody or a continuous exposure to low titers of the autoantibody has resulted in persistent GPVI deficiency. Under high shear flow, the patient's platelets could not form large aggregates, although initial platelet attachment was obviously observed. These results suggest that GPVI deficiency in this patient resulted in defective platelet thrombi development, manifesting as bleeding diathesis. Furthermore, our observations indicate that coordination of GPVI with integrin alpha2beta1 is essential for physiological platelet thrombus formation.
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Affiliation(s)
- H Kojima
- Division of Hematology, Institute of Clinical Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan.
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Kuwana M, Kurata Y, Fujimura K, Fujisawa K, Wada H, Nagasawa T, Nomura S, Kojima T, Yagi H, Ikeda Y. Preliminary laboratory based diagnostic criteria for immune thrombocytopenic purpura: evaluation by multi-center prospective study. J Thromb Haemost 2006; 4:1936-43. [PMID: 16961601 DOI: 10.1111/j.1538-7836.2006.02091.x] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND We proposed diagnostic criteria for immune thrombocytopenic purpura (ITP) by modifying the existing guidelines for diagnosis of ITP and by incorporating laboratory tests found useful for predicting its diagnosis, for example erythrocyte count, leukocyte count, anti-GPIIb/IIIa antibody-producing B cells, platelet-associated anti-GPIIb/IIIa antibodies, percentage of reticulated platelets, and plasma thrombopoietin. OBJECTIVE AND METHODS To validate our criteria, we conducted a multi-center prospective study involving 112 patients with thrombocytopenia and a morphologically normal peripheral blood film at the first visit. Each patient underwent a physical examination, routine laboratory tests, and specialized tests for the anti-GPIIb/IIIa antibody response and platelet turnover. RESULTS Ninety-one patients (81%) satisfied the proposed criteria at first visit. Clinical diagnosis was made by skilled hematologists > 6 months after the first visit; ITP was diagnosed in 88 patients and non-ITP disorders in 24. The proposed criteria had 98% sensitivity, 79% specificity, a 95% positive predictive value, and a 90% negative predictive value. A relatively low specificity appears to be attributed to a few patients who had both ITP and aplastic anemia or myelodysplastic syndrome. CONCLUSIONS Our preliminary diagnostic criteria based on ITP-associated laboratory findings were useful for the differential diagnosis of ITP, but additional evaluations and modifications will be necessary to develop criteria that can be used routinely.
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Affiliation(s)
- M Kuwana
- Department of Internal Medicine, Keio University School of Medicine, Tokyo, Japan.
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Yamagata K, Onizawa K, Yanagawa T, Hasegawa Y, Kojima H, Nagasawa T, Yoshida H. A prospective study to evaluate a new dental management protocol before hematopoietic stem cell transplantation. Bone Marrow Transplant 2006; 38:237-42. [PMID: 16850033 DOI: 10.1038/sj.bmt.1705429] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.8] [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: 11/09/2022]
Abstract
Pre-hematopoietic stem cell transplantation (HSCT) dental treatment is essential to prevent serious infections from oral sources during immunosuppression, in patients who undergo HSCT therapy. This study was planned to establish a dental management protocol for such patients. Forty-one patients scheduled for HSCT to treat hematological malignancies were consecutively enrolled in the prospective trial. The dental status of all patients was evaluated by clinical and radiographic examination at a median of 47 days before the commencement of HSCT therapy. Thirty-six patients had one or more dental diseases; the remaining five had none. Caries was found in 26 patients, apical periodontitis in 19, marginal periodontitis in 24 and a partially erupted third molar in 11. Our policy is to preserve patients' teeth whenever possible, and therefore minimal dental intervention was planned. Treatment was completed for all 36 patients with dental pathologies, before the conditioning regimen began. All patients received the scheduled HSCT therapy without alteration, interruption or delay, and did not show any signs or symptoms associated with odontogenic infection while they were immunosuppressed. This protocol, therefore, appears to be appropriate for the pre-HSCT dental treatment of patients with hematological diseases.
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Affiliation(s)
- K Yamagata
- Department of Oral and Maxillofacial Surgery, Institute of Clinical Medicine, University of Tsukuba, Tsukuba, Japan
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Fujii Y, Khoshnoodi J, Takenaka H, Hosoyamada M, Nakajo A, Bessho F, Kudo A, Takahashi S, Arimura Y, Yamada A, Nagasawa T, Ruotsalainen V, Tryggvason K, Lee AS, Yan K. The effect of dexamethasone on defective nephrin transport caused by ER stress: a potential mechanism for the therapeutic action of glucocorticoids in the acquired glomerular diseases. Kidney Int 2006; 69:1350-9. [PMID: 16531978 DOI: 10.1038/sj.ki.5000317] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The mechanism by which glucocorticoids govern antiproteinuric effect in nephrotic syndrome remains unknown. Present study examined the protective role of dexamethasone (DEX) in the intracellular trafficking of nephrin under endoplasmic reticulum (ER) stress. Human embryonic kidney-293 cell line expressing a full-length human nephrin was cultured in mediums containing 5.5 or 25 mM glucose with or without DEX. The result revealed that glucose starvation evoked a rapid ER stress leading to formation of underglycosylated nephrin that was remained in the ER as a complex with calreticulin/calnexin. DEX rescued this interfered trafficking through binding to its receptor and stimulating the mitochondrial transcripts and adenosine 5' triphosphate (ATP) production, leading to synthesis of fully glycosylated nephrin. These results suggest that ER-stress in podocytes may cause alteration of nephrin N-glycosylation, which may be an underlying factor in the pathomechanism of the proteinuria in nephrotic syndrome. DEX may restore this imbalance by stimulating expression of mitochondrial genes, resulted in the production of ATP that is essential factor for proper folding machinery aided by the ER chaperones.
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Affiliation(s)
- Y Fujii
- Department of Internal Medicine, Kyorin University School of Medicine, Mitaka, Tokyo, Japan
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Hamano Y, Yoshida T, Kito M, Nakamori S, Nagasawa T, Takagi H. Biological function of the pld gene product that degrades -poly-l-lysine in Streptomyces albulus. Appl Microbiol Biotechnol 2006; 72:173-181. [PMID: 16568315 DOI: 10.1007/s00253-006-0396-4] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2005] [Revised: 02/22/2006] [Accepted: 02/27/2006] [Indexed: 11/25/2022]
Abstract
Epsilon-poly-L-lysine (epsilon-PL) is one of the few naturally occurring biopolymers and is characterized by a peptide bond between the alpha-carboxyl and epsilon-amino groups. Previously, we purified and characterized the epsilon-PL-degrading enzyme (Pld) from Streptomyces albulus, which is an epsilon-PL producer, and this enzyme was expected to confer self-resistance to the epsilon-PL produced by the organism itself. The gene encoding Pld was cloned based on the N-terminal amino acid sequence determined in this study, and a sequencing analysis revealed eight open reading frames (ORFs), i.e., ORF1 to ORF8 in the flanking region surrounding the pld gene (present in ORF5). To investigate the biological function of Pld, we constructed a knockout mutant in which the pld gene is inactivated. Studies on epsilon-PL susceptibility, epsilon-PL-degrading activity, and epsilon-PL productivity demonstrated that the pld gene does play a partial role in self-resistance and that S. albulus was found to produce other epsilon-PL-degrading enzyme(s) in addition to Pld. To the best of our knowledge, this is the first report on a self-resistance gene for a biopolymer possessing antibacterial activity.
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Affiliation(s)
- Y Hamano
- Department of Bioscience, Fukui Prefectural University, Fukui, 910-1195, Japan
| | - T Yoshida
- Department of Biomolecular Science, Gifu University, Gifu, 501-1193, Japan
| | - M Kito
- Department of Biomolecular Science, Gifu University, Gifu, 501-1193, Japan
| | - S Nakamori
- Department of Bioscience, Fukui Prefectural University, Fukui, 910-1195, Japan
| | - T Nagasawa
- Department of Biomolecular Science, Gifu University, Gifu, 501-1193, Japan.
| | - H Takagi
- Department of Bioscience, Fukui Prefectural University, Fukui, 910-1195, Japan.
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Yashiro R, Nagasawa T, Kiji M, Hormdee D, Kobayashi H, Koshy G, Nitta H, Ishikawa I. Transforming growth factor-beta stimulates Interleukin-11 production by human periodontal ligament and gingival fibroblasts. J Clin Periodontol 2006; 33:165-71. [PMID: 16489941 DOI: 10.1111/j.1600-051x.2006.00898.x] [Citation(s) in RCA: 21] [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: 11/29/2022]
Abstract
BACKGROUND Transforming growth factor (TGF)-beta is a potent multifunctional polypeptide, abundant in the bone matrix. Interleukin (IL)-11 is a pleiotropic cytokine with effects on multiple cell types. The present study was performed to evaluate the regulatory effects of TGF-beta on IL-11 production by human periodontal ligament cells (PDL) and human gingival fibroblasts (HGF). MATERIAL AND METHODS The expression of TGF-beta receptor in PDL and HGF were observed using flow cytometry. PDL and HGF were stimulated with TGF-beta with or without protein kinase C (PKC) inhibitors and activator. IL-11, bone morphogenetic protein-2 (BMP-2) and TGF-beta mRNA expression was quantified by real-time polymerase chain reaction (PCR). IL-11 production was measured using enzyme-linked immunosorbent assay. RESULTS PDL and HGF expressed both TGF-beta receptor I and TGF-beta receptor II on the cell surfaces. IL-11 mRNA expression and IL-11 production were augmented by TGF-beta in both PDL and HGF, with higher values in PDL. PKC inhibitors partially suppressed TGF-beta-induced IL-11 production in PDL and HGF, whereas activator enhanced it. TGF-beta mRNA and BMP-2 mRNA expression were up-regulated by TGF-beta in PDL. CONCLUSION These results suggest that PDL produce IL-11 in response to TGF-beta.
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Affiliation(s)
- R Yashiro
- Periodontology, Department of Hard Tissue Engineering, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan.
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Yamaguchi Y, Nagasawa T, Kitagawa A, Nakamura N, Matsumoto K, Uchiwa H, Hirata K, Igarashi R. New nanotechnology for the guided tissue regeneration of skin--potential of lyotropic liquid crystals. Pharmazie 2006; 61:112-6. [PMID: 16526557] [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: 05/07/2023]
Abstract
Tissue in body must quickly recognize injury to response to the rapid pace of epidermal growth. In skin, the epidermal cells must also react to danger signals from the surrounding extracellular lipid of the stratum corneum spaces and immediately participate by initiating the wound repair process. The topical administration of the lyotropic liquid crystal nanocube to stratum corneum rapidly broke down the lipid lamella structure which would be recognized as a wound without organ-change. This can activate a variety of biological processes. This study set out to determine whether the phase transition of the lipid to a neighbouring different physicochemical structure can stimulate keratinocyte cells and what mechanism is responsible for this response. Using small angle x-ray scattering (SAXS) analysis, a response to the transient structural change of lipid was detected which might result from the diffusion of oil and/or water from nanocube liquid crystal towards the lipid lamella phase. Simultaneously, a significant increase in growth factors and inflammatory cytokines was detected after administration of nanocube. Not only the excess expression of cytokines but also the extent of TEWL as a barrier marker of skin increased. These observations suggest that a structural change in lipid can stimulate and trigger recognition of a slight injury in the wound defence and a repair response as homeostasis. This method actually succeeded in improving photo-induced hyperpigmentation on a human face.
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Affiliation(s)
- Y Yamaguchi
- Institute of Medical Science, St. Marianna University, School of Medicine, Sugao 2-16-1 Miyamae-ku, Kawasaki-sh, Kanagawa-ken 216-8512, Japan.
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