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Ogata Y, Fujieda Y, Oku K, Tsutsumi A. A case of Hashimoto's thyroiditis presented with heliotrope-like skin rash. Scand J Rheumatol 2022; 51:525-526. [PMID: 35658785 DOI: 10.1080/03009742.2022.2070971] [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: 10/18/2022]
Affiliation(s)
- Y Ogata
- Takikawa Municipal Hospital, Takikawa, Japan
| | - Y Fujieda
- Department of Rheumatology, Endocrinology, and Nephrology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - K Oku
- Department of Rheumatology and Infectious Diseases, Kitasato University School of Medicine, Sagamihara, Japan
| | - A Tsutsumi
- Takikawa Municipal Hospital, Takikawa, Japan
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Isojima S, Yajima N, Yanai R, Miura Y, Fukuma S, Kaneko K, Fujio K, Oku K, Matsushita M, Miyamae T, Wada T, Kaneko Y, Tanaka Y, Nakajima A, Murashima A. POS0734 THE CLINICAL JUDGMENT FOR THE ACCEPTABILITY OF PREGNANCY IN PATIENTS WITH SEROLOGICALLY ACTIVE SLE IN JAPAN: A NATIONWIDE ONLINE SURVEY FROM THE VIGNETTE STUDY. Ann Rheum Dis 2022. [DOI: 10.1136/annrheumdis-2022-eular.1397] [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: 11/03/2022]
Abstract
BackgroundThe risk of pregnancy complications, such as gestational hypertension is high in pregnancies with SLE. In addition, the risk of flare is elevated if pregnancy occurs during the high disease activity. The EULAR recommendation provides a checklist for preconception counseling, in which patients with SLE desiring pregnancy were required the condition that the disease activity prior to pregnancy should be stable for 6-12 months in terms of serological activity (1). However, it does not provide specific criteria for serological activity so that physicians should evaluate the risk of pregnancy in each case by their clinical intuitions.ObjectivesIn order to uncover the present clinical situation for the acceptability of pregnancy in patients with SLE, we performed questionnaire survey to physicians regarding to the degree of serological activity.MethodsThis cross-sectional study was performed to physicians registered with the Japanese College of Rheumatology from December 2020 to January 2021 using the online survey. The questionnaire asked about the characteristics of physicians, facilities and the permission of pregnancies with SLE using vignette scenarios. In this study, data from vignettes of women visiting a regular outpatient clinic were used. The vignettes varied in age (28 or 35 years), duration of stable disease and serological activity. Analysis methods were descriptive statistics, chi-square test. generalized estimating equations (GEE) was performed to investigate the relationship between the determining permission for pregnancy and the scenario patient’s characteristics (age, period of stable disease, titer of anti ds-DNA antibody)ResultsThe questionnaire was distributed to 4946 physicians, and 463 responded. Completion rate (ratio agreed to participate/finished survey) of survey was 91.1%. The median age of physicians was 46 (interquartile range (IQR) 2-10). The specialty was rheumatology (84.9%), other internal medicine (8%), and pediatrics (5.6%). There were no significant differences in patient’s age about the acceptability of pregnancy (coeffficianet -0.02, 95% CI -0.17 -0.01, p=0.42). Case who had been stable for 6 months were more tolerant of pregnancy than case who had been stable for 3 months (coeffficianet 0.12, 95% CI 0.09-0.15, P<0.001) Pregnancy was not allowed in case with mild or high serological activity (mild: coefficient -0.49, 95% CI -0.29- -0.22, p <0.001, high: -0.64, 95% CI -0.65 - -0.61, p <0.001). In contrast, as many as 92 (19.2%) physicians tolerated pregnancy even in the presence of residual high anti ds-DNA antibody titers. Female physicians are significantly more cautious about pregnancy than male when patients have a serologically high activity (12% vs 37.5%, p<0.001). There were no significant differences in specialty status or clinical experience.ConclusionWe found that even mild serological activity alone had a significant negative effect on the physician’s decision to allow pregnancy. We conclude that current physicians make cautious decisions about pregnancies of patients with SLE following the recommendation. On the other hand, an additional investigation should be performed about the results of pregnancies in patients with serological abnormalities, since there are some physicians who thought that pregnancy may be acceptable for patients with only serological abnormalities if the clinical symptoms are stable.References[1]Ann Rheum Dis.2017 Mar;76(3):476-485AcknowledgementsI would like to express my gratitude to the members of Japan College of Rheumatology who cooperated in filling out the questionnaire.Disclosure of InterestsSakiko Isojima: None declared, Nobuyuki Yajima: None declared, Ryo Yanai: None declared, Yoko Miura: None declared, Shingo Fukuma: None declared, Kayoko Kaneko: None declared, Keishi Fujio: None declared, Kenji Oku: None declared, Masakazu Matsushita: None declared, Takako Miyamae: None declared, Takashi Wada: None declared, Yuko Kaneko: None declared, Yoshiya Tanaka Speakers bureau: Y. Tanaka has received speaking fees and/or honoraria from Gilead, Abbvie, Behringer-Ingelheim, Eli Lilly, Mitsubishi-Tanabe, Chugai, Amgen, YL Biologics, Eisai, Astellas, Bristol-Myers, Astra-Zeneca, Grant/research support from: Y. Tanaka has received research grants from Asahi-Kasei, Abbvie, Chugai, Mitsubishi-Tanabe, Eisai, Takeda, Corrona, Daiichi-Sankyo, Kowa, Behringer-Ingelheim, and consultant fee from Eli Lilly, Daiichi-Sankyo, Taisho, Ayumi, Sanofi, GSK, Abbvie., Ayako Nakajima: None declared, ATSUKO MURASHIMA: None declared
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Ninagawa K, Kato M, Kono M, Fujieda Y, Oku K, Atsumi T. POS0863 DIFFERENTIATING THE DOMINANCE OF PULMONARY VASCULAR DISEASE OR INTERSTITIAL LUNG DISEASE ON HEMODYNAMIC ABNORMALITIES IN SYSTEMIC SCLEROSIS AND CLARIFYING EACH CHARACTERISTIC BY USING QUANTITATIVE EVALUATION OF CHEST CT. Ann Rheum Dis 2021. [DOI: 10.1136/annrheumdis-2021-eular.2569] [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:Group 1 and 3 pulmonary hypertension (PH) develop through different pathological mechanisms but have similar hemodynamic abnormalities. Systemic sclerosis (SSc) is associated with both pulmonary vascular disease (PVD) and interstitial lung disease (ILD), making it challenging to differentiate group 1 and 3 PH in those patients. A previous study using quantitative evaluation of chest computed tomography (CT) demonstrated that normal lung volume was inversely correlated with mean pulmonary arterial pressure (mPAP) in patients with group 3 PH (1).Objectives:In this study, we aimed to assess the dominance of PVD or ILD in SSc patients by quantitative evaluation of chest CT and to evaluate each characteristic.Methods:A total of 76 SSc patients who underwent right heart catheterization (RHC) were included. Chest CT was evaluated by using a software (Synapse Vincent Ver.3.0, Fujifilm) which quantified normal and total area of the lung. Then, we calculated abnormal area by drawing normal area from total area in the lung (%). Pulmonary function test (PFT) and serum biomarkers, such as KL-6 and LDH, were also evaluated. The dominance of PVD or ILD was defined as divergent or parallel change between the first and last assessments, respectively, in mPAP and abnormal area in the lung calculated using the software. Increase or decrease by over 10% in the last assessment compared to the first assessment was considered as a significant change in mPAP or abnormal area in the lung. P values were calculated by Mann-Whitney U test, and correlation coefficients were calculated by direct regression variance.Results:The median [range] values of mPAP and abnormal area in the lung at baseline were 23 [9-65] mmHg and 30.2 [0-100] %, respectively. Of 37 SSc and PH patients, 18 were defined as having PVD dominance while 19 as ILD dominance. Abnormal area in the lung at baseline was greater in patients with ILD dominance compared to those with PVD dominance (39.1 [16.3-98.3] v.s. 14.0 [0-99] %, p=0.002), whereas mPAP was higher in patients with PVD dominance than those with ILD dominance (42.5 [23.0-65.0] v.s. 26.0 [16.0-42.0] mmHg, p=0.002). PFT parameters including forced vital capacity were not different between the two groups. The ratio of mPAP/KL-6 showed a great difference between the two groups with its significant elevation in patients with PVD dominance (p=0.007).Conclusion:Quantitative evaluation of chest CT showed great efficiency in differentiating the dominance of PVD or ILD in patients with SSc and PH. In addition, the ratio of mPAP/KL-6 may easily be used as a parameter for dominance evaluation.References:[1]Iwasawa T, Kato S, Ogura T, Kusakawa Y, Iso S, Baba T, et al. Low-normal lung volume correlates with pulmonary hypertension in fibrotic idiopathic interstitial pneumonia: computer-aided 3D quantitative analysis of chest CT. AJR Am J Roentgenol. 2014;203(2):W166-73.Disclosure of Interests:None declared
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Sugawara M, Fujieda Y, Noguchi A, Tanimura S, Shimizu Y, Nakagawa I, Kono M, Kato M, Oku K, Atsumi T. SAT0057 PREDICTING INADEQUATE RESPONSE TO JAK INHIBITORS BY CLUSTER ANALYSIS IN PATIENTS WITH RHEUMATOID ARTHRITIS. Ann Rheum Dis 2020. [DOI: 10.1136/annrheumdis-2020-eular.2267] [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:Oral Janus kinase inhibitors (JAKi) have dramatically altered outcomes in patients with rheumatoid arthritis (RA). However, there remains some proportion of patients who respond to inadequately JAKi treatment (JAKi-IR) [1,2]. The characteristics in RA patients associated with JAKi-IR have not been fully demonstrated.Objectives:To clarify the characteristics of JAKi-IR in patients with RA by cluster analysis.Methods:This retrospective study comprised 120 RA patients who were treated with JAKi (Tofacitinib or Baricitinib) between July 2013 and September 2019 in five facilities. The disease status at the baseline, at 12 weeks after JAKi treatment and at the time point of withdrawing JAKi was assessed using the Disease Activity Score (DAS28) and the American College of Rheumatology (ACR) response criteria. JAKi-IR was defined as follows, primary non-response at 12 weeks after JAKi treatment: withdrawal of JAKi with ACR20 non-response or non-improvement in DAS28-CRP (ΔDAS28-CRP<1.2 from baseline), secondary non-response: withdrawal of JAKi without clinical remission after 12 weeks. Hierarchical cluster analysis was performed with the following variables: gender, age, disease duration, bone erosion, ACR functional classification (Class ≥3), comcomitant rheumatoid arthritis related interstitial lung disease (RA-ILD) or other autoimmune disease (AID), anti-citrullinated protein antibody (ACPA) positivity, rheumatoid factor (RF) at baseline, use/dose of methotrexate (MTX) and prednisolone (PSL), serum ESR/CRP, tender/swollen joint counts (TJC/SJC), visual analog scale by patients (VAS-Pt), and prior of biologic DMARDs.Results:The 120 enrolled patients were classified into 4 groups by cluster analysis(Figure1), The characteristics of each group are as follows, Group A(n=21): female + bone erosion + RF/ACPA positive + AID + MTX non-user, Group B(n=36): male + older age + RA-ILD + RF/ACPA positive + MTX non-user, Group C(n=35): RF/ACPA positive + absence of RA-ILD + MTX user, Group D (n=28): seronegative + MTX user + absence of RA-ILD + history of biologic DMARDs failure. The rate of JAKi-IR was A:9%, B:8%, C:20%, D:32%, and the significant difference between Group B and D was identified (p=0.02). In multiple comparison of 4 groups, no significant difference was identified (p=0.06) (Figure2).Conclusion:JAKi-IR would be more likely to be seronegative, MTX use, absence of RA-ILD and history of biologic DMARDs failure. Cluster analysis is an exploratory tool that aids in the analysis of huge amount of data.References:[1] Takeuchi T, Yamanaka H, Yamaoka K, Arai S, Toyoizumi S, DeMasi R, et al. Efficacy and safety of tofacitinib in Japanese patients with rheumatoid arthritis by background methotrexate dose: A post hoc analysis of clinical trial data. Mod Rheumatol. 2019;29(5):756-66.[2] Tanaka Y, Atsumi T, Amano K, Harigai M, Ishii T, Kawaguchi O, et al. Efficacy and safety of baricitinib in Japanese patients with rheumatoid arthritis: Subgroup analyses of four multinational phase 3 randomized trials. Mod Rheumatol. 2018;28(4):583-91.Disclosure of Interests:Masanari Sugawara: None declared, Yuichiro Fujieda: None declared, Atsushi Noguchi: None declared, Shun Tanimura: None declared, Yuka Shimizu: None declared, Ikuma Nakagawa: None declared, Michihito Kono: None declared, Masaru Kato: None declared, Kenji Oku: None declared, Tatsuya Atsumi Grant/research support from: Eli Lily Japan K.K., Alexion Pharmaceuticals, Inc., Bristol-Myers Squibb Co., AbbVie Inc., Daiichi Sankyo Co., Ltd., Pfizer Inc., Chugai Pharmaceutical Co., Ltd., Mitsubishi Tanabe Pharma Co., Astellas Pharma Inc., Consultant of: Gilead Sciences, Inc., Eli Lilly Japan K.K., UCB Japan Co. Ltd., AbbVie Inc., Daiichi Sankyo Co., Ltd., Pfizer Inc., Chugai Pharmaceutical Co., Ltd., Speakers bureau: Eli Lilly Japan K.K., UCB Japan Co. Ltd., Bristol-Myers Squibb Co., AbbVie Inc., Eisai Co. Ltd., Otsuka Pharmaceutical Co., Ltd., Daiichi Sankyo Co., Ltd., Pfizer Inc., Chugai Pharmaceutical Co., Ltd., Mitsubishi Tanabe Pharma Co., Takeda Pharmaceutical Co., Ltd., Astellas Pharma Inc.
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Sato T, Nakamura H, Fujieda Y, Ohnishi N, Abe N, Kono M, Kato M, Oku K, Bohgaki T, Amengual O, Yasuda S, Atsumi T. Factor Xa inhibitors for preventing recurrent thrombosis in patients with antiphospholipid syndrome: a longitudinal cohort study. Lupus 2019; 28:1577-1582. [PMID: 31635559 DOI: 10.1177/0961203319881200] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
OBJECTIVE The objective of this study was to clarify the efficacy and safety of factor Xa inhibitors for antiphospholipid syndrome patients in real world utilization. METHODS This is a retrospective cohort study comprised of all consecutive patients with antiphospholipid syndrome in our department over a period of 28 years. Patients treated with factor Xa inhibitors were extracted from the cohort. As a control group, patients treated with warfarin were selected from the same cohort with matched age, gender, coexistence of systemic lupus erythematosus, and the presence of antiplatelet therapy, after which we used a propensity score for each of the risk factors as an additional covariate in multivariate Cox proportional hazard regression. The primary endpoint was set as thrombotic and hemorrhagic event-free survival for five years. RESULTS Among 206 patients with antiphospholipid syndrome, 18 had a history of anti-Xa therapy (five rivaroxaban, 12 edoxaban, one apixaban). Fourteen out of 18 patients on anti-Xa therapy had switched to factor Xa inhibitors from warfarin. Event-free survival was significantly shorter during anti-Xa therapy than that during warfarin therapy (hazard ratio: 12.1, 95% confidence interval: 1.73-248, p = 0.01) ( Figure 1(a) ). Similarly, event-free survival in patients treated with factor Xa inhibitors was significantly shorter compared with controls (hazard ratio: 4.62, 95% confidence interval: 1.54-13.6, p = 0.0075). In the multivariate Cox proportional hazard model, event-free survival in patients with anti-Xa therapy remained significantly shorter (hazard ratio: 11.9, 95% confidence interval: 2.93-56.0, p = 0.0005). CONCLUSIONS Factor Xa inhibitors may not be recommended for antiphospholipid syndrome.
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Affiliation(s)
- T Sato
- Department of Rheumatology, Endocrinology and Nephrology, Hokkaido University, Sapporo, Japan
| | - H Nakamura
- Department of Rheumatology, Endocrinology and Nephrology, Hokkaido University, Sapporo, Japan
| | - Y Fujieda
- Department of Rheumatology, Endocrinology and Nephrology, Hokkaido University, Sapporo, Japan
| | - N Ohnishi
- Department of Rheumatology, Endocrinology and Nephrology, Hokkaido University, Sapporo, Japan
| | - N Abe
- Department of Rheumatology, Endocrinology and Nephrology, Hokkaido University, Sapporo, Japan
| | - M Kono
- Department of Rheumatology, Endocrinology and Nephrology, Hokkaido University, Sapporo, Japan
| | - M Kato
- Department of Rheumatology, Endocrinology and Nephrology, Hokkaido University, Sapporo, Japan
| | - K Oku
- Department of Rheumatology, Endocrinology and Nephrology, Hokkaido University, Sapporo, Japan
| | - T Bohgaki
- Department of Rheumatology, Endocrinology and Nephrology, Hokkaido University, Sapporo, Japan
| | - O Amengual
- Department of Rheumatology, Endocrinology and Nephrology, Hokkaido University, Sapporo, Japan
| | - S Yasuda
- Department of Rheumatology, Endocrinology and Nephrology, Hokkaido University, Sapporo, Japan
| | - T Atsumi
- Department of Rheumatology, Endocrinology and Nephrology, Hokkaido University, Sapporo, Japan
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Sugawara E, Kato M, Fujieda Y, Oku K, Bohgaki T, Yasuda S, Umazume T, Morikawa M, Watari H, Atsumi T. Pregnancy outcomes in women with rheumatic diseases: a real-world observational study in Japan. Lupus 2019; 28:1407-1416. [PMID: 31551035 DOI: 10.1177/0961203319877258] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
OBJECTIVES We aimed to evaluate the obstetric complications and the risk factors for these events in pregnant women with rheumatic diseases (RDs). METHODS A single-center retrospective study of women with RDs at Hokkaido University Hospital between 2007 and 2016 was conducted. Clinical features and maternal and fetal outcomes were retrospectively collected. The rate of pregnancy complications was compared with the general obstetric population (GOP) in Japan. RESULTS Overall, 132 pregnancies in 95 women with RDs were recorded. Underlying RDs were systemic erythematosus (SLE) (n = 57), antiphospholipid syndrome (APS) (n = 35), rheumatoid arthritis (n = 9), and other RDs (n = 31). Antiphospholipid antibodies (aPL) were detected in 44 pregnancies (32%). Glucocorticoid was used in 82 pregnancies (62%), and tacrolimus in 20 pregnancies (15%). There were 24 disease flares (18%), but no RD-related death was documented. We recorded 112 live births, 6 abortions, 8 miscarriages, and 6 stillbirths. Pregnancies with RDs appeared to have frequent, emergency cesarean sections and preterm deliveries compared with GOP (30% vs 15% and 21% vs 14%, respectively). The median [interquartile range] birthweight in SLE and APS was lower than GOP (2591 [2231-2958] g and 2600 [2276-2920] g vs 2950 [2650-3250] g, respectively). In pregnancies with SLE, low complement levels presented the risk of maternal complications (odds ratio [95% CI]; 3.9 [1.0-14.9], p = 0.046) and anti-DNA antibody positivity was significantly correlated with the risk of fetal complications (3.5 [1.1-11.2], p = 0.036). In pregnancies with APS, maternal age over 35 years and duration of disease longer than 9 years (7.4 [1.3-40.8], p = 0.021, and 11.16 [1.1-118.8], p = 0.046, respectively) were significantly correlated with the risk of fetal complications. CONCLUSION Pregnancies with RDs were at increased risk of having both maternal complications and adverse neonatal outcomes, indicating these pregnancies should be closely monitored.
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Affiliation(s)
- E Sugawara
- Department of Rheumatology, Endocrinology and Nephrology, Hokkaido University Faculty and Graduate School of Medicine, Sapporo, Japan
| | - M Kato
- Department of Rheumatology, Endocrinology and Nephrology, Hokkaido University Faculty and Graduate School of Medicine, Sapporo, Japan
| | - Y Fujieda
- Department of Rheumatology, Endocrinology and Nephrology, Hokkaido University Faculty and Graduate School of Medicine, Sapporo, Japan
| | - K Oku
- Department of Rheumatology, Endocrinology and Nephrology, Hokkaido University Faculty and Graduate School of Medicine, Sapporo, Japan
| | - T Bohgaki
- Department of Rheumatology, Endocrinology and Nephrology, Hokkaido University Faculty and Graduate School of Medicine, Sapporo, Japan
| | - S Yasuda
- Department of Rheumatology, Endocrinology and Nephrology, Hokkaido University Faculty and Graduate School of Medicine, Sapporo, Japan
| | - T Umazume
- Department of Obstetrics and Gynecology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - M Morikawa
- Department of Obstetrics and Gynecology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - H Watari
- Department of Obstetrics and Gynecology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - T Atsumi
- Department of Rheumatology, Endocrinology and Nephrology, Hokkaido University Faculty and Graduate School of Medicine, Sapporo, Japan
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Sutter A, Travers LM, Oku K, L. Delaney K, J. Store S, Price TAR, Wedell N. Flexible polyandry in female flies is an adaptive response to infertile males. Behav Ecol 2019. [DOI: 10.1093/beheco/arz140] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Abstract
Infertility is common in nature despite its obvious cost to individual fitness. Rising global temperatures are predicted to decrease fertility, and male sterility is frequently used in attempts to regulate pest or disease vector populations. When males are infertile, females may mate with multiple males to ensure fertilization, and changes in female mating behavior in turn could intensify selection on male fertility. Fertility assurance is a potentially wide-spread explanation for polyandry, but whether and how it actually contributes to the evolution of polyandry is not clear. Moreover, whether a drop in male fertility would lead to a genetic increase in polyandry depends on whether females respond genetically or through behavioral plasticity to male infertility. Here, we experimentally manipulate male fertility through heat-exposure in Drosophila pseudoobscura, and test female discrimination against infertile males before and after mating. Using isogenic lines, we compare the roles of behaviorally plastic versus genetically fixed polyandry. We find that heat-exposed males are less active and attractive, and that females are more likely to remate after mating with these males. Remating rate increases with reduced reproductive output, indicating that females use current sperm storage threshold to make dynamic remating decisions. After remating with fertile males, females restore normal fecundity levels. Our results suggest that male infertility could explain the evolution of adaptively flexible polyandry, but is less likely to cause an increase in genetic polyandry.
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Affiliation(s)
- Andreas Sutter
- Centre for Ecology and Conservation, College of Life and Environmental Sciences, University of Exeter, Penryn Campus, Penryn, UK
- School of Biological Sciences, Norwich Research Park, University of East Anglia, Norwich, UK, and
| | - Laura M Travers
- Centre for Ecology and Conservation, College of Life and Environmental Sciences, University of Exeter, Penryn Campus, Penryn, UK
- School of Biological Sciences, Norwich Research Park, University of East Anglia, Norwich, UK, and
| | - Keiko Oku
- Centre for Ecology and Conservation, College of Life and Environmental Sciences, University of Exeter, Penryn Campus, Penryn, UK
| | - Kynan L. Delaney
- Centre for Ecology and Conservation, College of Life and Environmental Sciences, University of Exeter, Penryn Campus, Penryn, UK
| | - Stefan J. Store
- Centre for Ecology and Conservation, College of Life and Environmental Sciences, University of Exeter, Penryn Campus, Penryn, UK
| | - Tom A R Price
- Institute of Integrative Biology, University of Liverpool, Liverpool, UK
| | - Nina Wedell
- Centre for Ecology and Conservation, College of Life and Environmental Sciences, University of Exeter, Penryn Campus, Penryn, UK
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Sutter A, Travers LM, Weedon M, Oku K, Price TAR, Wedell N. No selection for change in polyandry under experimental evolution. J Evol Biol 2019; 32:717-730. [PMID: 30970158 DOI: 10.1111/jeb.13476] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Revised: 04/04/2019] [Accepted: 04/05/2019] [Indexed: 12/11/2022]
Abstract
What drives mating system variation is a major question in evolutionary biology. Female multiple mating (polyandry) has diverse evolutionary consequences, and there are many potential benefits and costs of polyandry. However, our understanding of its evolution is biased towards studies enforcing monandry in polyandrous species. What drives and maintains variation in polyandry between individuals, genotypes, populations and species remains poorly understood. Genetic variation in polyandry may be actively maintained by selection, or arise by chance if polyandry is selectively neutral. In Drosophila pseudoobscura, there is genetic variation in polyandry between and within populations. We used isofemale lines to found replicate populations with high or low initial levels of polyandry and tracked polyandry under experimental evolution over seven generations. Polyandry remained relatively stable, reflecting the starting frequencies of the experimental populations. There were no clear fitness differences between high versus low polyandry genotypes, and there was no signature of balancing selection. We confirmed these patterns in direct comparisons between evolved and ancestral females and found no consequences of polyandry for female fecundity. The absence of differential selection even when initiating populations with major differences in polyandry casts some doubt on the importance of polyandry for female fitness.
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Affiliation(s)
- Andreas Sutter
- Centre for Ecology and Conservation, College of Life and Environmental Sciences, University of Exeter, Penryn, UK.,School of Biological Sciences, University of East Anglia, Norwich, UK
| | - Laura M Travers
- Centre for Ecology and Conservation, College of Life and Environmental Sciences, University of Exeter, Penryn, UK.,School of Biological Sciences, University of East Anglia, Norwich, UK
| | - Melanie Weedon
- Centre for Ecology and Conservation, College of Life and Environmental Sciences, University of Exeter, Penryn, UK
| | - Keiko Oku
- Centre for Ecology and Conservation, College of Life and Environmental Sciences, University of Exeter, Penryn, UK
| | - Thomas A R Price
- Institute of Integrative Biology, University of Liverpool, Liverpool, UK
| | - Nina Wedell
- Centre for Ecology and Conservation, College of Life and Environmental Sciences, University of Exeter, Penryn, UK
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Abstract
Abstract
Immunity is an important mechanism of protection against pathogens and parasites. One factor that can influence immunity is mating. During mating, male-derived materials are transferred to females, and the physical contact also involves the potential risk of sexually transmitted infections, and wounding. Thus, mating can challenge a female’s immune system. This review focuses on exploring how immunity and mating interact in female insects. Although mating has been shown to cause female immune responses in several species, the responses do not always match the observed resistance to pathogens/parasites. Mating up-regulates female immune responses while female resistance is reduced compared to virgin females in some species, and vice versa in other taxa. We discuss why mismatches occur and why post-mating female resistance differs among species, and suggest that measured immune responses may not correlate with female resistance. Also, the mating system will play a major role. Polyandrous mating systems can generate intense post-mating sexual conflict, which can impose high costs of mating on females. Reduced female post-mating resistance may be due to direct suppression of female immunity by males. Alternatively, polyandry may increase the risk of sexually transmitted infections. If this is the major factor driving female post-mating resistance, females of polyandrous species should have higher post-mating immunity. To date, there are insufficient numbers of studies to fully answer the question ‘does mating negatively affect female immune defences in insects?’ To elucidate the links between immunity and mating in females, we need more studies in more species with varied mating systems.
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Affiliation(s)
- Keiko Oku
- 1Centre for Ecology and Conservation, University of Exeter, Cornwall Campus, Penryn TR10 9FE, UK
| | - Tom A.R. Price
- 2Institute of Integrative Biology, University of Liverpool, Biosciences Building, Crown Street, Liverpool L69 7ZB, UK
| | - Nina Wedell
- 1Centre for Ecology and Conservation, University of Exeter, Cornwall Campus, Penryn TR10 9FE, UK
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Oku K, Poelman EH, de Jong PW, Dicke M. Female response to predation risk alters conspecific male behaviour during pre-copulatory mate guarding. Ethology 2017. [DOI: 10.1111/eth.12710] [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: 11/29/2022]
Affiliation(s)
- Keiko Oku
- Laboratory of Entomology; Wageningen University; Wageningen The Netherlands
- National Agriculture and Food Research Organization, Agricultural Research Center; Tsukuba Ibaraki Japan
| | - Erik H. Poelman
- Laboratory of Entomology; Wageningen University; Wageningen The Netherlands
| | - Peter W. de Jong
- Laboratory of Entomology; Wageningen University; Wageningen The Netherlands
| | - Marcel Dicke
- Laboratory of Entomology; Wageningen University; Wageningen The Netherlands
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Hisada R, Kato M, Sugawara E, Fujieda Y, Oku K, Bohgaki T, Amengual O, Yasuda S, Atsumi T. Thrombotic risk stratification by platelet count in patients with antiphospholipid antibodies: a longitudinal study. J Thromb Haemost 2017; 15:1782-1787. [PMID: 28662299 DOI: 10.1111/jth.13763] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [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] [Received: 03/23/2017] [Indexed: 08/30/2023]
Abstract
Essentials Thrombotic risk stratification is an unmet need in antiphospholipid antibody carriers. Platelet count and antiphospholipid score (aPL-S) were combined to predict thrombotic events. Patients with high aPL-S are at high thrombotic risk regardless of platelet count. If platelet count is low, patients with low aPL-S are also on high thrombotic risk. SUMMARY Background Thrombocytopenia is a non-criteria clinical manifestation of antiphospholipid syndrome. However, it remains to be elucidated whether thrombocytopenia increases thrombotic risk in antiphospholipid antibody (aPL) carriers. Objectives To investigate the impact of platelet count in terms of predicting thrombotic events in aPL carriers, and to stratify the thrombotic risk by combining platelet count and antiphospholipid score (aPL-S), which represents a quantification of aPL varieties and titers. Patients/methods A single-center, retrospective, longitudinal study comprising 953 consecutive patients who were suspected of having autoimmune disease between January 2002 and December 2006 was performed. Low platelet count was defined as a count of < 150 × 103 μL-1 at the time of aPL testing. Results A negative correlation was observed between aPL-S and platelet count (r = - 0.2477). Among aPL-positive patients, those with a low platelet count developed thrombosis more frequently than those without (hazard ratio [HR] 2.95, 95% confidence interval [CI] 1.11-7.88). Among aPL-negative patients, no difference was found in the predictive value of thrombosis regardless of platelet count. Patients with aPLs were further divided into two subgroups according to aPL-S. Among low-aPL-S patients, those with low platelet counts developed thrombosis more frequently than those without (HR 3.44, 95% CI 1.05-11.2). In contrast, high-aPL-S patients developed thrombosis frequently regardless of platelet count. Conclusions aPL carriers with low platelet counts are at high risk of developing thrombosis. In particular, 'low-aPL-S carriers' may be stratified by platelet count in terms of predicting future thrombotic events.
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Affiliation(s)
- R Hisada
- Department of Rheumatology, Endocrinology and Nephrology, Graduate School of Medicine and Faculty of Medicine, Hokkaido University, Sapporo, Japan
| | - M Kato
- Department of Rheumatology, Endocrinology and Nephrology, Graduate School of Medicine and Faculty of Medicine, Hokkaido University, Sapporo, Japan
| | - E Sugawara
- Department of Rheumatology, Endocrinology and Nephrology, Graduate School of Medicine and Faculty of Medicine, Hokkaido University, Sapporo, Japan
| | - Y Fujieda
- Department of Rheumatology, Endocrinology and Nephrology, Graduate School of Medicine and Faculty of Medicine, Hokkaido University, Sapporo, Japan
| | - K Oku
- Department of Rheumatology, Endocrinology and Nephrology, Graduate School of Medicine and Faculty of Medicine, Hokkaido University, Sapporo, Japan
| | - T Bohgaki
- Department of Rheumatology, Endocrinology and Nephrology, Graduate School of Medicine and Faculty of Medicine, Hokkaido University, Sapporo, Japan
| | - O Amengual
- Department of Rheumatology, Endocrinology and Nephrology, Graduate School of Medicine and Faculty of Medicine, Hokkaido University, Sapporo, Japan
| | - S Yasuda
- Department of Rheumatology, Endocrinology and Nephrology, Graduate School of Medicine and Faculty of Medicine, Hokkaido University, Sapporo, Japan
| | - T Atsumi
- Department of Rheumatology, Endocrinology and Nephrology, Graduate School of Medicine and Faculty of Medicine, Hokkaido University, Sapporo, Japan
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Watanabe T, Oku K, Amengual O, Hisada R, Ohmura K, Nakagawa I, Shida H, Bohgaki T, Horita T, Yasuda S, Atsumi T. Effects of statins on thrombosis development in patients with systemic lupus erythematosus and antiphospholipid antibodies. Lupus 2017; 27:225-234. [DOI: 10.1177/0961203317716787] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- T Watanabe
- Division of Rheumatology, Endocrinology and Nephrology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - K Oku
- Division of Rheumatology, Endocrinology and Nephrology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - O Amengual
- Division of Rheumatology, Endocrinology and Nephrology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - R Hisada
- Division of Rheumatology, Endocrinology and Nephrology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - K Ohmura
- Division of Rheumatology, Endocrinology and Nephrology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - I Nakagawa
- Division of Rheumatology, Endocrinology and Nephrology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - H Shida
- Division of Rheumatology, Endocrinology and Nephrology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - T Bohgaki
- Division of Rheumatology, Endocrinology and Nephrology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - T Horita
- Division of Rheumatology, Endocrinology and Nephrology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - S Yasuda
- Division of Rheumatology, Endocrinology and Nephrology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - T Atsumi
- Division of Rheumatology, Endocrinology and Nephrology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
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Oku K, van den Beuken TPG. Male behavioural plasticity depends on maternal mating status in the two-spotted spider mite. Exp Appl Acarol 2017; 71:319-327. [PMID: 28432470 PMCID: PMC5437173 DOI: 10.1007/s10493-017-0127-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Accepted: 04/09/2017] [Indexed: 06/07/2023]
Abstract
In haplodiploid organisms including the two-spotted spider mite, Tetranychus urticae (Acari: Tetranychidae), both unmated and mated females can produce male offspring. A previous study reported that males produced by unmated females (UM males) find pre-reproductive females more quickly than males produced by mated females (M males) in T. urticae. However, it remains unclear what factors cause the difference. We investigated effects of maternal mating status on mate-searching behaviour of their sons by changing the sons' developmental environment. In T. urticae, the primary sex ratio of mated-female colonies is female-biased. For both UM and M males, half of individuals were reared with males to imitate unmated-female colonies, whereas the rest were reared with females to imitate mated-female colonies. In UM males, individuals that had developed with males found pre-reproductive females more quickly than those that had developed with females. However, such a difference was not observed in M males. This indicates that behavioural response to the developmental environment differs between UM and M males. It means that the behavioural plasticity depends on maternal mating status. When males were individually reared, however, there was no significant difference in the mate-searching behaviour between UM and M males, indicating that maternal mating status does not independently affect their sons' mate-searching behaviour. This study showed that male mate-searching behaviour is changed by their developmental environment and maternal mating status. This behavioural plasticity depending on maternal mating status is the first reported in haplodiploid organisms.
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Affiliation(s)
- Keiko Oku
- National Agriculture and Food Research Organization (NARO), Agricultural Research Center, Tsukuba, Japan.
- Laboratory of Entomology, Wageningen University, P. O. Box 16, 6700 AA, Wageningen, The Netherlands.
| | - Tom P G van den Beuken
- Laboratory of Entomology, Wageningen University, P. O. Box 16, 6700 AA, Wageningen, The Netherlands
- Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, P. O. Box 94248, 1090 GE, Amsterdam, The Netherlands
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14
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Nakamura H, Amengual O, Horita T, Kato M, Oku K, Bohgaki T, Yasuda S, Atsumi T. Acute aortic thrombosis related to antiphospholipid antibodies. Lupus 2016; 26:783-784. [PMID: 27852934 DOI: 10.1177/0961203316678672] [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: 11/17/2022]
Affiliation(s)
- H Nakamura
- Division of Rheumatology, Endocrinology and Nephrology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - O Amengual
- Division of Rheumatology, Endocrinology and Nephrology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - T Horita
- Division of Rheumatology, Endocrinology and Nephrology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - M Kato
- Division of Rheumatology, Endocrinology and Nephrology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - K Oku
- Division of Rheumatology, Endocrinology and Nephrology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - T Bohgaki
- Division of Rheumatology, Endocrinology and Nephrology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - S Yasuda
- Division of Rheumatology, Endocrinology and Nephrology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - T Atsumi
- Division of Rheumatology, Endocrinology and Nephrology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
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Amengual O, Forastiero R, Sugiura-Ogasawara M, Otomo K, Oku K, Favas C, Delgado Alves J, Žigon P, Ambrožič A, Tomšič M, Ruiz-Arruza I, Ruiz-Irastorza G, Bertolaccini ML, Norman GL, Shums Z, Arai J, Murashima A, Tebo AE, Gerosa M, Meroni PL, Rodriguez-Pintó I, Cervera R, Swadzba J, Musial J, Atsumi T. Evaluation of phosphatidylserine-dependent antiprothrombin antibody testing for the diagnosis of antiphospholipid syndrome: results of an international multicentre study. Lupus 2016; 26:266-276. [PMID: 27510605 DOI: 10.1177/0961203316660203] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Objective A task force of scientists at the International Congress on Antiphospholipid Antibodies recognized that phosphatidylserine-dependent antiprothrombin antibodies (aPS/PT) might contribute to a better identification of antiphospholipid syndrome (APS). Accordingly, initial and replication retrospective, cross-sectional multicentre studies were conducted to ascertain the value of aPS/PT for APS diagnosis. Methods In the initial study (eight centres, seven countries), clinical/laboratory data were retrospectively collected. Serum/plasma samples were tested for IgG aPS/PT at Inova Diagnostics (Inova) using two ELISA kits. A replication study (five centres, five countries) was carried out afterwards. Results In the initial study ( n = 247), a moderate agreement between the IgG aPS/PT Inova and MBL ELISA kits was observed ( k = 0.598). IgG aPS/PT were more prevalent in APS patients (51%) than in those without (9%), OR 10.8, 95% CI (4.0-29.3), p < 0.0001. Sensitivity, specificity, positive (LR+) and negative (LR-) likelihood ratio of IgG aPS/PT for APS diagnosis were 51%, 91%, 5.9 and 0.5, respectively. In the replication study ( n = 214), a moderate/substantial agreement between the IgG aPS/PT results obtained with both ELISA kits was observed ( k = 0.630). IgG aPS/PT were more prevalent in APS patients (47%) than in those without (12%), OR 6.4, 95% CI (2.6-16), p < 0.0001. Sensitivity, specificity, LR + and LR- for APS diagnosis were 47%, 88%, 3.9 and 0.6, respectively. Conclusions IgG aPS/PT detection is an easily performed laboratory parameter that might contribute to a better and more complete identification of patients with APS.
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Affiliation(s)
- O Amengual
- 1 Division of Rheumatology, Endocrinology and Nephrology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - R Forastiero
- 2 Instituto de Medicina Traslacional, Trasplante y Bioingeniería (IMeTTyB), Universidad Favaloro-CONICET, Departamento de Fisiologia, Hemostasia y Trombosis, Buenos Aires, Argentina
| | - M Sugiura-Ogasawara
- 3 Department of Obstetrics and Gynecology, Nagoya City University, Graduated School of Medical Sciences, Nagoya, Japan
| | - K Otomo
- 1 Division of Rheumatology, Endocrinology and Nephrology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - K Oku
- 1 Division of Rheumatology, Endocrinology and Nephrology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - C Favas
- 4 Department of Medicine IV, Fernando Fonseca Hospital, Amadora and CEDOC/NOVA Medical School, Lisbon, Portugal
| | - J Delgado Alves
- 4 Department of Medicine IV, Fernando Fonseca Hospital, Amadora and CEDOC/NOVA Medical School, Lisbon, Portugal
| | - P Žigon
- 5 Department of Rheumatology, University Medical Centre Ljubljana, Ljubljana, Slovenia
| | - A Ambrožič
- 5 Department of Rheumatology, University Medical Centre Ljubljana, Ljubljana, Slovenia
| | - M Tomšič
- 5 Department of Rheumatology, University Medical Centre Ljubljana, Ljubljana, Slovenia
| | - I Ruiz-Arruza
- 6 Autoimmune Diseases Research Unit, Department of Internal Medicine, Biocruces Health Research Institute, Hospital Universitario Cruces, University of The Basque Country, Spain
| | - G Ruiz-Irastorza
- 6 Autoimmune Diseases Research Unit, Department of Internal Medicine, Biocruces Health Research Institute, Hospital Universitario Cruces, University of The Basque Country, Spain
| | - M L Bertolaccini
- 7 Academic Department of Vascular Surgery, Cardiovascular Division, King's College London, UK
| | - G L Norman
- 8 Inova Diagnostics Inc., San Diego, CA, USA
| | - Z Shums
- 8 Inova Diagnostics Inc., San Diego, CA, USA
| | - J Arai
- 9 Medical and Biological Laboratories, Co. Ltd, Nagano, Japan
| | - A Murashima
- 10 Center of Maternal-Fetal, Neonatal and Reproductive Medicine, National Center for Child Health and Development, Tokyo, Japan
| | - A E Tebo
- 11 Department of Pathology, University of Utah and ARUP Laboratories, Salt Lake City, UT, USA
| | - M Gerosa
- 12 Department of Clinical Sciences and Community Health, Istituto Auxologico Italiano, University of Milan, Milan, Italy
| | - P L Meroni
- 12 Department of Clinical Sciences and Community Health, Istituto Auxologico Italiano, University of Milan, Milan, Italy
| | - I Rodriguez-Pintó
- 13 Department of Autoimmune Diseases, Hospital Clínic, University of Barcelona, Barcelona, Catalonia, Spain
| | - R Cervera
- 13 Department of Autoimmune Diseases, Hospital Clínic, University of Barcelona, Barcelona, Catalonia, Spain
| | - J Swadzba
- 14 Department of Medicine Jagiellonian University, Cracow, Poland
| | - J Musial
- 14 Department of Medicine Jagiellonian University, Cracow, Poland
| | - T Atsumi
- 1 Division of Rheumatology, Endocrinology and Nephrology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
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Hisada R, Kato M, Sugawara E, Ohmura K, Nakagawa I, Oku K, Bohgaki T, Amengual O, Horita T, Yasuda S, Atsumi T. THU0354 Thrombocytopenia in Patients with Antiphospholipid Antibodies: A Paradoxical Thrombotic Risk Factor. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.1838] [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: 11/04/2022]
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Otomo K, Amengual O, Fujieda Y, Nakagawa H, Kato M, Oku K, Horita T, Yasuda S, Matsumoto M, Nakayama KI, Hatakeyama S, Koike T, Atsumi T. Role of apolipoprotein B100 and oxidized low-density lipoprotein in the monocyte tissue factor induction mediated by anti-β2 glycoprotein I antibodies. Lupus 2016; 25:1288-98. [PMID: 26964561 DOI: 10.1177/0961203316638165] [Citation(s) in RCA: 7] [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] [Received: 12/10/2015] [Accepted: 02/12/2016] [Indexed: 01/23/2023]
Abstract
OBJECTIVE The objective of this paper is to elucidate the not yet known plasma molecule candidates involved in the induction of tissue factor (TF) expression mediated by β2GPI-dependent anticardiolipin antibody (aCL/β2GPI) on monocytes. METHODS Human serum incubated with FLAG-β2GPI was applied for affinity chromatography with anti- FLAG antibody. Immunopurified proteins were analyzed by a liquid chromatography coupled with mass spectrometry (LC-MS). TF mRNA induced by the identified molecules on monocytes was also analyzed. RESULTS Apolipoprotein B100 (APOB) was the only identified serum molecule in the MS search. Oxidized LDL, containing APOB as well as ox-Lig1 (a known ligand of β2GPI), was revealed as a β2GPI-binding molecule in the immunoprecipitation assay. TF mRNA was markedly induced by oxidized LDL/β2GPI complexes with either WBCAL-1 (monoclonal aCL/β2GPI) or purified IgG from APS patients. The activities of lipoprotein-associated phospholipase A2, one of the component molecules of oxidized LDL, were significantly higher in serum from APS patients than in those from controls. CONCLUSION APOB (or oxidized LDL) was detected as a major β2GPI binding serum molecule by LC-MS search. Oxidized LDL/aCL/β2GPI complexes significantly induced TF expressions on monocytes. These data suggest that complexes of oxidized LDL and aCL/β2GPI may have a crucial role in the pathophysiology of APS.
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Affiliation(s)
- K Otomo
- Division of Rheumatology, Endocrinology and Nephrology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - O Amengual
- Division of Rheumatology, Endocrinology and Nephrology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Y Fujieda
- Division of Rheumatology, Endocrinology and Nephrology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - H Nakagawa
- Division of Rheumatology, Endocrinology and Nephrology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - M Kato
- Division of Rheumatology, Endocrinology and Nephrology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - K Oku
- Division of Rheumatology, Endocrinology and Nephrology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - T Horita
- Division of Rheumatology, Endocrinology and Nephrology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - S Yasuda
- Division of Rheumatology, Endocrinology and Nephrology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - M Matsumoto
- Division of Proteomics, Multi-scale Research Center for Prevention of Medical Science, Medical Institute of Bioregulation, Kyushu University, Fukuoka, Japan
| | - K I Nakayama
- Division of Proteomics, Multi-scale Research Center for Prevention of Medical Science, Medical Institute of Bioregulation, Kyushu University, Fukuoka, Japan
| | - S Hatakeyama
- Department of Biochemistry, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - T Koike
- Sapporo Medical Center NTT EC, Sapporo, Japan
| | - T Atsumi
- Division of Rheumatology, Endocrinology and Nephrology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
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Oku K. Precopulatory mate guarding influences the development of quiescent deutonymph females in the two-spotted spider mite (Acari: Tetranychidae). Exp Appl Acarol 2016; 68:33-38. [PMID: 26530990 DOI: 10.1007/s10493-015-9983-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2015] [Accepted: 10/22/2015] [Indexed: 06/05/2023]
Abstract
Individuals of some organisms have a specific stage sensitive to environmental cues that initiate developmental plasticity which subsequently influences their entire development. Females may use male behaviour such as precopulatory mate guarding as an environmental cue to change their developmental rate. In the two-spotted spider mite Tetranychus urticae (Acari: Tetranychidae), only the first insemination results in fertilization and males guard quiescent deutonymph females. As quiescent individuals take on a silvery appearance before moulting, the period of the quiescent stage can be divided into two parts: from entering the quiescent stage to becoming silvery (1st period) and from becoming silvery to moulting (2nd period). Females may be sensitive to precopulatory mate guarding immediately before moulting (i.e. 2nd period). Thus, I examined whether precopulatory mate guarding during either period affects the total developmental duration of quiescent deutonymph females. When guarded by a male, the whole developmental duration of the quiescent deutonymph females became significantly shorter (by 3-5%) than that of solitary ones, regardless whether the guarding occurred during the 1st period, the 2nd period or both periods. In conclusion, quiescent deutonymph T. urticae females use precopulatory mate guarding by conspecific males as an environmental cue for their developmental rate, although they are sensitive to the mate guarding not only immediately before moulting.
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Affiliation(s)
- Keiko Oku
- Laboratory of Entomology, Wageningen University, P.O. Box 16, 6700 AA, Wageningen, The Netherlands.
- National Agriculture and Food Research Organization (NARO), Agricultural Research Center, Tsukuba, Ibaraki, 305-8666, Japan.
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Noguchi A, Yasuda S, Kono M, Kato M, Oku K, Bohgaki T, Amengual O, Horita T, Sato T, Tsujino I, Nishimura M, Atsumi T. AB0677 Cardiac Magnetic Resonance Imaging Detects Disease-Specific Biventricular Involvement in Patients with Systemic Sclerosis-Associated Pulmonary Arterial Hypertension. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.3651] [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: 11/03/2022]
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Amengual O, Fujita D, Ota E, Carmona L, Oku K, Sugiura-Ogasawara M, Murashima A, Atsumi T. Primary prophylaxis to prevent obstetric complications in asymptomatic women with antiphospholipid antibodies: a systematic review. Lupus 2015; 24:1135-42. [PMID: 25813871 DOI: 10.1177/0961203315578765] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2014] [Accepted: 03/02/2015] [Indexed: 01/08/2023]
Abstract
OBJECTIVE Obstetric complications are common in patients with antiphospholipid syndrome. However, the impact of antiphosholipid antibodies (aPL) in the pregnancy outcomes of asymptomatic aPL carriers is uncertain. The aim of this systematic review is to assess whether primary prophylaxis is beneficial to prevent obstetric complications during pregnancy in asymptomatic women positive for aPL who have no history of recurrent pregnancy loss or intrauterine fetal death. METHODS Studies evaluating the effect of prophylactic treatment versus no treatment in asymptomatic pregnant aPL carriers were identified in an electronic database search. Design, population and outcome homogeneity of studies was assessed and meta-analysis was performed. The pooled Mantel-Haenszel relative risk of specific pregnancy outcomes was obtained using random effects models. Heterogeneity was measured with the I(2) statistic. All analyses were conducted using Review Manager 5.3. RESULTS Data from five studies involving 154 pregnancies were included and three studies were meta-analysed. The risk ratio and 95% confidence interval (CI) of live birth rates, preterm birth, low birth weight and overall pregnancy complications in treated and untreated pregnancies were 1.14 (0.18-7.31); 1.71 (0.32-8.98); 0.98 (0.07-13.54) and 2.15 (0.63-7.33),respectively. Results from the meta-analysis revealed that prophylactic treatment with aspirin is not superior to placebo to prevent pregnancy complications in asymptomatic aPL carriers. CONCLUSION This systematic review did not find evidence of the superiority of prophylactic treatment with aspirin compared to placebo or usual care to prevent unfavourable obstetric outcomes in otherwise healthy women with aPL during the first pregnancy.
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Affiliation(s)
- O Amengual
- Division of Rheumatology, Endocrinology and Nephrology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - D Fujita
- Department of Obstetrics and Gynecology, Osaka Medical College, Takatsuki City, Osaka, Japan
| | - E Ota
- Department of Health Policy, National Center for Child Health and Development, Tokyo, Japan
| | - L Carmona
- Institute for Musculoskeletal Health, Madrid, Spain
| | - K Oku
- Division of Rheumatology, Endocrinology and Nephrology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | | | - A Murashima
- Department of Rheumatology, Center of Maternal-Fetal, Neonatal and Reproductive Medicine, National Center for Child Health and Development, Tokyo, Japan
| | - T Atsumi
- Division of Rheumatology, Endocrinology and Nephrology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
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Oku K, Weldegergis BT, Poelman EH, De Jong PW, Dicke M. Altered volatile profile associated with precopulatory mate guarding attracts spider mite males. J Chem Ecol 2015; 41:187-93. [PMID: 25612522 DOI: 10.1007/s10886-015-0547-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2014] [Revised: 12/15/2014] [Accepted: 01/08/2015] [Indexed: 12/01/2022]
Abstract
Proximate factors affecting animal behavior include stimuli generated by conspecifics. In spider mites of the genus Tetranychus (Acari: Tetranychidae), males guard pre-reproductive quiescent females, because only the first mating results in fertilization. In a dual-choice experiment, more adult males of T. urticae were attracted to females guarded by a male than to solitary females. Because spider mites are known to perceive volatiles, we hypothesized that guarded and solitary females differ in the volatile blends emitted. To test this hypothesis, headspace volatiles of guarded females, solitary females, and solitary males were collected, respectively. GC/MS analysis detected octanal, methyl salicylate, ethyl 4-ethoxybenzoate, and methyl cis-dihydrojasmonate in all of the groups. Orthogonal Projection to Latent Structures Discriminant Analysis (OPLS-DA) of the blends clearly discriminated guarded females from solitary females, supporting our hypothesis. Individual compounds did not show significant difference in emission rates for guarded females vs. solitary females, suggesting that differences lay in the total blend composition. OPLS-DA did not discriminate between the blends emitted by guarded females and solitary males. In conclusion, the differences in the volatile blends are likely to mediate male discrimination between guarded and solitary females.
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Affiliation(s)
- Keiko Oku
- Laboratory of Entomology, Wageningen University, P.O. Box 8031, 6700 EH, Wageningen, The Netherlands,
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Oku K, Amengual O, Bohgaki T, Horita T, Yasuda S, Atsumi T. An independent validation of the Global Anti-Phospholipid Syndrome Score in a Japanese cohort of patients with autoimmune diseases. Lupus 2014; 24:774-5. [DOI: 10.1177/0961203314561284] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2014] [Accepted: 11/04/2014] [Indexed: 11/15/2022]
Affiliation(s)
- K Oku
- Department of Rheumatology, Endocrinology and Nephrology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - O Amengual
- Department of Rheumatology, Endocrinology and Nephrology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - T Bohgaki
- Department of Rheumatology, Endocrinology and Nephrology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - T Horita
- Department of Rheumatology, Endocrinology and Nephrology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - S Yasuda
- Department of Rheumatology, Endocrinology and Nephrology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - T Atsumi
- Department of Rheumatology, Endocrinology and Nephrology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
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Archer CR, Duffy E, Hosken DJ, Mokkonen M, Okada K, Oku K, Sharma MD, Hunt J. Sex‐specific effects of natural and sexual selection on the evolution of life span and ageing in
Drosophila simulans. Funct Ecol 2014. [DOI: 10.1111/1365-2435.12369] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- C. Ruth Archer
- Centre for Ecology and Conservation College of Life and Environmental Sciences University of Exeter Penryn CampusTR10 9EZ UK
- Max Planck Research Group Modelling the Evolution of Ageing Max Planck Institute for Demographic Research Konrad‐Zuse‐Str. 1 18057 Rostock Germany
| | - Eoin Duffy
- Centre for Ecology and Conservation College of Life and Environmental Sciences University of Exeter Penryn CampusTR10 9EZ UK
- Institute of Environmental Science Jagiellonian University Gronostajowa 730‐387 Krakow Poland
| | - David J. Hosken
- Centre for Ecology and Conservation College of Life and Environmental Sciences University of Exeter Penryn CampusTR10 9EZ UK
| | - Mikael Mokkonen
- Centre for Ecology and Conservation College of Life and Environmental Sciences University of Exeter Penryn CampusTR10 9EZ UK
- Department of Biological and Environmental Science University of Jyväskylä P.O. Box 35 (YA)FI‐40014 Jyväskylä Finland
| | - Kensuke Okada
- Centre for Ecology and Conservation College of Life and Environmental Sciences University of Exeter Penryn CampusTR10 9EZ UK
- Laboratory of Evolutionary Ecology Graduate School of Environmental Sciences Okayama University Tsushima‐naka 1‐1‐1Okayama Japan
| | - Keiko Oku
- Centre for Ecology and Conservation College of Life and Environmental Sciences University of Exeter Penryn CampusTR10 9EZ UK
- Laboratory of Entomology Wageningen University P.O. Box 80316700 EH Wageningen The Netherlands
| | - Manmohan D. Sharma
- Centre for Ecology and Conservation College of Life and Environmental Sciences University of Exeter Penryn CampusTR10 9EZ UK
| | - John Hunt
- Centre for Ecology and Conservation College of Life and Environmental Sciences University of Exeter Penryn CampusTR10 9EZ UK
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Abstract
Recently our group introduced the “antiphospholipid score” (aPL-S), a quantitative marker that represents aPL profile. We have validated its efficacy for the diagnosis of antiphospholipid syndrome (APS) and predictive value for thrombosis. The study comprised two independent sets of patients with autoimmune diseases. In the first set of patients ( n = 233), the aPL-S was established by analyzing aPL profiles. In the second set of patients ( n = 411), the predictive value of the aPL-S for thrombosis was evaluated. To define aPL-S, we calculated the relative risks (approximated by odds ratios (ORs)) of having APS manifestations (thrombosis and/or pregnancy morbidity) for each of the aPL tests and devised an original formula in which aPL-S was determined by OR: aPL-S = 5 × exp ([OR] −5)/4. The receiver operating characteristic (ROC) curve showed a hyperbolic pattern and the area under the ROC curve value was 0.752 (0.686 for revised Sapporo criteria), implying that aPL-S is a potential quantitative marker for APS diagnosis. The OR for thrombosis in patients with a high aPL-S (≥30) was 5.27 (95% confidence interval (95% CI) 2.32–11.95, p < 0.0001). By multivariate analysis, an aPL-S of ≥30 appeared to be an independent risk factor for thrombosis (hazard ratio 3.144 (95% CI 1.383–7.150), p = 0.006). The aPL-S is a useful quantitative index for diagnosing APS and may be a predictive marker for thrombosis in autoimmune diseases.
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Affiliation(s)
- K Oku
- Department of Rheumatology, Endocrinology and Nephrology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - O Amengual
- Department of Rheumatology, Endocrinology and Nephrology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - T Atsumi
- Department of Rheumatology, Endocrinology and Nephrology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
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Matsugi A, Uehara S, Kamata N, Mori N, Oku K, Mukai K, Nagano K. P694: Task dependency of long latency facilitatory effect on soleus H-reflex by cerebellar transcranial magnetic stimulation. Clin Neurophysiol 2014. [DOI: 10.1016/s1388-2457(14)50788-2] [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: 11/30/2022]
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Amengual O, Forastiero R, Sugiura-Ogasawara M, Oku K, Otomo K, Alves J, Favas C, Žigon P, Ambrožič A, Tomšič M, Ruiz-Irastorza G, Ruiz-Arruza I, Bertolaccini M, Norman G, Shums Z, Arai J, Atsumi T. SAT0202 International Multi-Centre Study to Evaluate the Clinical Significance of Phosphatidylserine-Dependent Antiprothrombin Antibodies for the Diagnosis of Antiphospholipid Syndrome. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.2426] [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: 11/03/2022]
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27
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Niwa H, Kato H, Hobo S, Kinoshita Y, Ueno T, Katayama Y, Hariu K, Oku K, Senoh M, Kuroda T, Nakai K. Postoperative Clostridium difficile infection with PCR ribotype 078 strain identified at necropsy in five Thoroughbred racehorses. Vet Rec 2013; 173:607. [PMID: 24336792 DOI: 10.1136/vr.101960] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Clostridium difficile is an important cause of acute enterocolitis in horses. We describe five cases of C difficile infection occurring postoperatively in Thoroughbred racehorses. Following diarrhoea or colic accompanied by a marked increase in packed cell volume (to ≥60 per cent) and leucopenia (≤4000 cells/μl) within two to four days after surgery in all five horses, four of them died or were euthanased because of colitis or severe diarrhoea. In these four horses, necrotising entero-typhlo-colitis was revealed by postmortem examination, and C difficile was recovered from the contents of the small and/or large intestine. The remaining horse was euthanased because of marked decline in general condition and the presence of a lung abscess, from which C difficile was isolated. The horse had had severe postoperative diarrhoea before the onset of respiratory disorder; laboratory tests for C difficile were not performed on the faeces. All C difficile isolates were toxin-A-positive, toxin-B-positive and actin-specific ADP-ribosyltransferase (CDT)-positive. The isolates were indistinguishable by pulsed field gel electrophoresis analysis, PCR ribotyping, and slpA sequence typing, and the slpA sequences and PCR ribotype patterns were identical to those of known PCR type 078. This case sequence might have been healthcare-associated infection, although there was about a four-month interval between each disease onset.
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Affiliation(s)
- H Niwa
- Microbiology Division, Epizootic Research Center, Equine Research Institute, Japan Racing Association, Shiba 1400-4, Shimotsuke, Tochigi 329-0412, Japan
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Oku K, Shimoda T. Indirect evidence that guarded quiescent deutonymph females invest energy to attract conspecific males in the Kanzawa spider mite (Acari: Tetranychidae)? Exp Appl Acarol 2013; 60:445-449. [PMID: 23404179 DOI: 10.1007/s10493-013-9662-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2012] [Accepted: 01/30/2013] [Indexed: 06/01/2023]
Abstract
Because only the first mating results in fertilization in Tetranychus kanzawai (Acari: Tetranychidae), adult males guard quiescent deutonymph females (i.e., precopulatory mate guarding). A previous study reported that quiescent deutonymph females guarded by a male attract more conspecific males than solitary females and then hypothesized that guarded females release more chemical signals than solitary ones to attract males. Quiescent deutonymph females do not feed. If the hypothesis is appropriate, guarded females should invest energy in attracting males at the expense of investment in other activities, such as egg production. Therefore, we compared oviposition rates immediately after adult emergence between guarded females and solitary females. On the first day, the oviposition rate of guarded females was lower than that of solitary females. On the second day, however, there was no significant difference between female groups. These results suggest that guarded females invest energy in activities other than egg production before adult emergence and that the energetic cost is easily recoverable. We believe that our finding indirectly supports the hypothesis that guarded females release more chemical signals than solitary females to attract conspecific males.
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Affiliation(s)
- Keiko Oku
- National Agriculture and Food Research Organization, Agricultural Research Center, Tsukuba 305-8666, Japan.
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Kato M, Atsumi T, Oku K, Amengual O, Nakagawa H, Fujieda Y, Otomo K, Horita T, Yasuda S, Koike T. The involvement of CD36 in monocyte activation by antiphospholipid antibodies. Lupus 2013; 22:761-71. [DOI: 10.1177/0961203313490242] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Background CD36, known as a scavenger receptor, is a transmembrane glycoprotein expressed on monocytes, platelets and endothelial cells, recognizes multiple ligands, including phosphatidylserine, and regulates atherogenesis and thrombosis. The objective of this study is to investigate the possible involvement of CD36 in the pathophysiology of thrombosis in patients with antiphospholipid syndrome (APS). Methods First, rs3765187, a missense mutation linked to CD36 deficiency, was investigated by TaqMan polymerase chain reaction (PCR) genotyping method in 819 Japanese, including 132 patients with APS, 265 with systemic lupus erythematosus (SLE) in the absence of APS, and 422 healthy subjects. Then, the involvement of CD36 in antiphospholipid antibody (aPL)-induced tissue factor (TF) expression was examined using CD36-null mice or anti-CD36. Purified IgG from patients with APS and a monoclonal phosphatidylserine-dependent antiprothrombin antibody were used in these experiments. TF expression was tested by real-time PCR and flow cytometry. Results Minor allele carrier of rs3765187 was less frequent in patients with APS (3.8% p = 0.032), but not in patients with SLE in the absence of APS (7.9% p = 0.32), compared with healthy subjects (10.2%). The aPL-induced TF expression was significantly suppressed on peritoneal macrophages from CD36-null mice compared to wild type and significantly inhibited by anti-CD36 on human monocytes. Conclusions The gene mutation linked to CD36 deficiency was less frequent in patients with APS. The deficient or suppressed CD36 function significantly reduced aPL-induced TF expression in vitro. Taken together, in a susceptible background CD36 scavenger receptor function may be involved in the thrombotic pathophysiology in patients with APS.
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Affiliation(s)
- M Kato
- Department of Medicine II, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - T Atsumi
- Department of Medicine II, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - K Oku
- Department of Medicine II, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - O Amengual
- Department of Medicine II, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - H Nakagawa
- Department of Medicine II, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Y Fujieda
- Department of Medicine II, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - K Otomo
- Department of Medicine II, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - T Horita
- Department of Medicine II, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - S Yasuda
- Department of Medicine II, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - T Koike
- Department of Medicine II, Hokkaido University Graduate School of Medicine, Sapporo, Japan
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Watanabe T, Oku K, Amengual O, Shimamura S, Nakagawa I, Noguchi A, Kanetsuka Y, Kono M, Kurita T, Fujieda Y, Bohgaki T, Yasuda S, Horita T, Atsumi T. FRI0319 The analysis of risk and protective factors for thrombosis in systemic lupus erythematosus with or without antiphospholipid antibodies. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.1446] [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: 11/03/2022]
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Niwa H, Hobo S, Kinoshita Y, Muranaka M, Katayama Y, Oku K, Hariu K. The possibility of aneurism of the anterior mesenteric artery with parasitic infection as a site of Salmonella Abortusequi carriage. J Equine Vet Sci 2012. [DOI: 10.1016/j.jevs.2012.08.153] [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: 11/29/2022]
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Fujieda Y, Atsumi T, Amengual O, Odani T, Otomo K, Kato M, Oku K, Kon Y, Horita T, Yasuda S, Koike T. Predominant prevalence of arterial thrombosis in Japanese patients with antiphospholipid syndrome. Lupus 2012; 21:1506-14. [DOI: 10.1177/0961203312458469] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Objective: To study the clinical and immunological manifestations of antiphospholipid syndrome (APS) in the Japanese population by a single-centre registration. Methods: In this retrospective cohort study, 141 consecutive patients with APS, fulfilling the Sydney revised Sapporo criteria for definite APS, who visited our autoimmune clinic from 1988 to 2010, were recruited and followed up. All the patients were interviewed and underwent a general physical examination by qualified rheumatologists on the day of blood sampling. Results: The population comprised 119 woman and 22 men with a mean age at diagnosis of 44 years (range 9–79 years). Seventy patients (49.6%) had primary APS, and 71 (50.4%) had systemic lupus erythematosus. The prevalence of thrombosis was 85.8 per cent, arterial thrombosis was found in 93 patients (66.0%) and venous thrombosis was found in 46 patients (32.6%). The most common thrombosis was cerebral infarction [86/141 (61.0%)] followed by deep vein thrombosis [33/141 (23.4%)]. Among 70 pregnant women, 45 (64.3%) had obstetric complications. Lupus anticoagulant was detected in 116 patients (82.3%), anticardiolipin antibodies in 83 (58.9%), anti-β2 glycoprotein I antibodies in 73 (51.8%) and phosphatidylserine-dependent antiprothrombin antibodies in 98 (69.5%). Conclusion: High prevalence of arterial thrombosis was noted in Japanese patients with APS. The profile of heterogeneous and complex clinical manifestations was substantiated in Japanese patients with APS.
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Affiliation(s)
- Y Fujieda
- Department of Medicine II, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - T Atsumi
- Department of Medicine II, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - O Amengual
- Department of Medicine II, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - T Odani
- Department of Medicine II, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - K Otomo
- Department of Medicine II, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - M Kato
- Department of Medicine II, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - K Oku
- Department of Medicine II, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Y Kon
- Department of Medicine II, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - T Horita
- Department of Medicine II, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - S Yasuda
- Department of Medicine II, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - T Koike
- Department of Medicine II, Hokkaido University Graduate School of Medicine, Sapporo, Japan
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Kato M, Kataoka H, Odani T, Fujieda Y, Otomo K, Oku K, Horita T, Yasuda S, Atsumi T, Ohira H, Tsujino I, Nishimura M, Koike T. The short-term role of corticosteroid therapy for pulmonary arterial hypertension associated with connective tissue diseases: report of five cases and a literature review. Lupus 2011; 20:1047-56. [PMID: 21676917 DOI: 10.1177/0961203311403347] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Pulmonary arterial hypertension (PAH) is a life-threatening complication in connective tissue diseases (CTD). It remains controversial whether immunosuppressive therapy is useful for PAH associated with CTD (PAH-CTD). The Dana Point algorithm does not refer such treatments in patients with PAH-CTD due to the lack of evidence. However, some case reports have shown the potential efficacy of immunosuppression for PAH-CTD. Here we report five cases of PAH-CTD treated with corticosteroids and discuss the current management of PAH-CTD with immunosuppressive agents. Our cases consisted of three active systemic lupus erythematosus (SLE), a quiescent SLE and an active polymyositis. WHO functional classes at baseline were class III in three cases and class II in two. Median follow-up period was 44 (28-92) weeks. PAH was diagnosed by right heart catheterization in all cases (median pulmonary arterial pressure was 45 (29-49) mmHg). All patients received 1 mg/kg of prednisolone (PSL) for 2-4 weeks, followed by appropriate dose reduction. Methylprednisolone pulse therapy was performed in patients resistant to the high dosage of PSL. Four patients received vasodilators in combination. The therapy as above improved WHO functional class 4 weeks after the initiation of PSL in all the patients. Two patients required dose increase or additional administration of vasodilators due to the dose reduction of PSL. Corticosteroid therapy may be effective for PAH-CTD at least in the short term, even in low general activity of CTD or moderate PAH. Our experience suggests that corticosteroid therapy, by itself or in conjunction with standard vasodilators, is effective for PAH-CTD patients.
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Affiliation(s)
- M Kato
- Department of Medicine II, Hokkaido University Graduate School of Medicine, Sapporo, Japan
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Oku K. Males of the two-spotted spider mite attempt to copulate with mated females: effects of double mating on fitness of either sex. Exp Appl Acarol 2010; 50:107-113. [PMID: 19760507 DOI: 10.1007/s10493-009-9306-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2009] [Accepted: 08/28/2009] [Indexed: 05/28/2023]
Abstract
In Tetranychus urticae (Acari: Tetranychidae), when the intervals between first and second copulation are more than 24 h, only the first copulation is effective for females. Therefore, adult males should copulate only with virgin females, but not with females that copulated more than 1 day ago. Indeed, T. urticae males preferred virgin females to mated females under dual choice conditions. In the absence of virgin females, however, 60% of males copulated with mated females (n = 30). Therefore, the effects of male copulation behaviour on male and mated-female fitness were examined, respectively. Since T. urticae is arrhenotokous (i.e., only daughters have genes derived from their father), the proportion of females among the offspring was used as an index of male fitness. After males had lived with/without a mated female, the males were allowed to copulate with a virgin female. The proportion of females among the offspring did not differ between males with and without a female. On the other hand, when mated females lived with an adult male, their egg production was lower than mated females without a male. These results suggest that males do not seem to obtain fitness benefit from the copulation behaviour and that mated females incur a fitness cost due to the male behaviour.
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Affiliation(s)
- Keiko Oku
- Laboratory of Entomology, Wageningen University, P.O. Box 8031, 6700 EH Wageningen, The Netherlands.
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Oku K, Magalhães S, Dicke M. The presence of webbing affects the oviposition rate of two-spotted spider mites, Tetranychus urticae (Acari: Tetranychidae). Exp Appl Acarol 2009; 49:167-172. [PMID: 19221881 DOI: 10.1007/s10493-009-9252-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2008] [Accepted: 02/04/2009] [Indexed: 05/27/2023]
Abstract
Several species of tetranychid mites including Tetranychus urticae Koch (Acari: Tetranychidae) construct complicated three-dimensional webs on plant leaves. These webs provide protection against biotic and abiotic stress. As producing web is likely to entail a cost, mites that arrive on a leaf with web are expected to refrain from producing it, because they will gain the benefit of protection from the existing web. Mites that produce less web may then allocate resources that are not spent on web construction to other fitness-enhancing activities, such as laying eggs. To test this, the oviposition rate of T. urticae adult females was examined on leaves with web. As a control, we used leaves where the web had been removed, hence both types of leaves had been exposed to conspecifics previously and were thus damaged. On leaves with web, the oviposition rate of T. urticae females was higher than on leaves where the web had been removed. Therefore, the presence of web constructed by conspecifics enhanced the oviposition rate of T. urticae females. This provides indirect evidence that mites use the web constructed by conspecifics and thereby save resources that can be allocated to other traits that enhance reproductive success.
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Affiliation(s)
- Keiko Oku
- Laboratory of Entomology, Wageningen University, P.O. Box 8031, 6700, EH, Wageningen, The Netherlands.
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de Jong PW, Breuker CJ, de Vos H, Vermeer KM, Oku K, Verbaarschot P, Nielsen JK, Brakefield PM. Genetic differentiation between resistance phenotypes in the phytophagous flea beetle, Phyllotreta nemorum. J Insect Sci 2009; 9:1-8. [PMID: 20053124 PMCID: PMC3011967 DOI: 10.1673/031.009.6901] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/25/2007] [Accepted: 11/15/2008] [Indexed: 05/28/2023]
Abstract
The flea beetle Phyllotreta nemorum L. (Coleoptera: Chrysomelidae) is genetically polymorphic for resistance against the defences of one of its host plants, Barbarea vulgaris R.Br. (Brassicales: Brassicaceae). Whereas resistant flea beetles are able to use B. vulgaris as well as other cruciferous plants as food, non-resistant beetles cannot survive on B. vulgaris. This limitation to host plant use of non-resistant beetles could potentially lead to asymmetric gene flow and some degree of genetic isolation between the different resistance-genotypes. Therefore, we studied the extent of genetic differentiation at neutral allozyme loci between samples of flea beetles that were collected at different locations and first tested for resistance phenotype. Since earlier work has shown a weak, but significant, effect of geographical distance between the samples on their genetic differentiation, in the present study variation at the neutral allozyme loci in P. nemorum was partitioned between geographical distance and resistance-phenotype. Both sources independently contributed statistically significantly to population differentiation. Thus, there appears to be a limitation to genetic exchange between the resistant and non-resistant flea beetles when corrections are made for their geographic differentiation. This is consistent with the presence of some degree of host race formation in this flea beetle.
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Affiliation(s)
- Peter W. de Jong
- Laboratory of Entomology, Wageningen University, PO Box 8031, 6700 EH Wageningen, The Netherlands
| | - Casper J. Breuker
- Evolutionary Developmental Biology Research Group, School of Life Sciences, Oxford Brookes University, Gipsy Lane, Headington, Oxford, OX3 OBP, UK
| | - Helene de Vos
- Institute of Biology Leiden, section Evolutionary Biology, University of Leiden, PO Box 9516, 2300 RA Leiden, The Netherlands
| | - Kim M.C.A Vermeer
- Laboratory of Entomology, Wageningen University, PO Box 8031, 6700 EH Wageningen, The Netherlands
| | - Keiko Oku
- Rice Bug Management Research Team, National Agricultural Research Center, Tsukuba, lbaraki 305-8666, Japan
| | - Patrick Verbaarschot
- Laboratory of Entomology, Wageningen University, PO Box 8031, 6700 EH Wageningen, The Netherlands
| | - Jens Kvist Nielsen
- Department of Natural Sciences/Bioorganic Chemistry, University of Copenhagen, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Denmark
| | - Paul M. Brakefield
- Institute of Biology Leiden, section Evolutionary Biology, University of Leiden, PO Box 9516, 2300 RA Leiden, The Netherlands
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Fukaya S, Yasuda S, Hashimoto T, Oku K, Kataoka H, Horita T, Atsumi T, Koike T. Clinical features of haemophagocytic syndrome in patients with systemic autoimmune diseases: analysis of 30 cases. Rheumatology (Oxford) 2008; 47:1686-91. [PMID: 18782855 DOI: 10.1093/rheumatology/ken342] [Citation(s) in RCA: 203] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
OBJECTIVES Haemophagocytic syndrome (HPS) is known as a relatively rare complication in autoimmune diseases. Here we analysed the clinical features of HPS in patients with systemic autoimmune diseases. METHODS One thousand and fourteen patients with systemic autoimmune diseases admitted to Hokkaido University Hospital from 1997 to 2007 were recruited [350 SLE, 136 RA, 98 polymyositis/dermatomyositis (PM/DM), 88 SSc, 91 vasculitis syndrome, 37 primary SS, 26 adult onset Still's disease (AOSD) and 188 other diseases]. Clinical features and treatment outcomes were retrospectively analysed. RESULTS Thirty cases (3.0%) fulfilled HPS criteria (progressive cytopenia in two or more lineages and haemophagocytosis in reticuloendothelial systems). Underlying diseases were SLE (18), RA (2), PM/DM (2), SSc (2), vasculitis (1), SS (2) and AOSD (3). Nineteen patients were diagnosed as having autoimmune-associated HPS, eight infection-associated, one drug-induced and one developed HPS after haematopoietic stem cell transplantation. For the treatment of HPS, high-dose corticosteroid monotherapy was given in 26 cases, being effective in 12 (46%). Ten out of 15 patients with corticosteroid-resistant autoimmune-associated HPS were treated with CsA, cyclophosphamide or tacrolimus, leading to the remission in 80%. The overall mortality rate was 20%. Multivariate analysis showed that the presence of infections and CRP level >50 mg/l on HPS related with poor prognosis. CONCLUSIONS The prevalence of HPS among in-hospital patients with systemic autoimmunity is not ignorable. Administration of immunosuppressants was effective in cases with autoimmune-associated HPS, whereas prognosis was poor in infection-associated HPS.
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Affiliation(s)
- S Fukaya
- Department of Medicine II, Hokkaido University Graduate School of Medicine, Sapporo 060-8638, Japan
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40
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Oku K, Atsumi T, Bohgaki M, Amengual O, Kataoka H, Horita T, Yasuda S, Koike T. Complement activation in patients with primary antiphospholipid syndrome. Ann Rheum Dis 2008; 68:1030-5. [PMID: 18625630 DOI: 10.1136/ard.2008.090670] [Citation(s) in RCA: 164] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
OBJECTIVE To investigate the significance of complement activation in patients with primary antiphospholipid syndrome (APS). METHODS Thirty-six patients with primary APS, 42 control patients with non-systemic lupus erythematosus (SLE) connective tissue diseases, and 36 healthy volunteers were analysed retrospectively. Serum complement levels (C3, C4, CH(50)) and anaphylatoxins (C3a, C4a, C5a) were examined in all subjects, and serum complement regulatory factors (factor H and factor I) were measured in patients with primary APS. Plasma anticoagulant activity was determined in a mixing test using the activated partial thromboplastin time. RESULTS Serum complement levels were significantly lower in patients with primary APS than in patients with non-SLE connective tissue diseases (mean (SD) C3: 81.07 (17.86) vs 109.80 (22.76) mg/dl, p<0.001; C4: 13.04 (8.49) vs 21.70 (6.96) mg/dl, p<0.001; CH(50): 31.32 (8.76) vs 41.40 (7.70) U/ml, p<0.001) or healthy volunteers. Only two healthy subjects with low serum C4 levels showed hypocomplementaemia, whereas most patients with primary APS showed raised serum C3a and C4a. No subjects showed raised C5a. Patients with primary APS with low serum C3 or C4 had significantly higher levels of C3a or C4a than healthy controls. No patients had low serum complement regulatory factors. Among patients with primary APS, hypocomplementaemia was significantly more common in those with high anticoagulant activity than in those with low or normal activity. CONCLUSION Hypocomplementaemia is common in patients with primary APS, reflecting complement activation and consumption, and was correlated with anticoagulant activity, suggesting that antiphospholipid antibodies may activate monocytes and macrophages via anaphylatoxins produced in complement activation.
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Affiliation(s)
- K Oku
- Department of Medicine II, Hokkaido University Graduate School of Medicine, Sapporo, Japan
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Oku K. Is only the first mating effective for females in the Kanzawa spider mite, Tetranychus kanzawai (Acari: Tetranychidae)? Exp Appl Acarol 2008; 45:53-57. [PMID: 18523849 DOI: 10.1007/s10493-008-9157-7] [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] [Subscribe] [Scholar Register] [Received: 02/04/2008] [Accepted: 05/06/2008] [Indexed: 05/26/2023]
Abstract
Although only the first mating is effective for females in Tetranychus urticae (Acari: Tetranychidae), it remains unclear whether this is also true for closely related species, such as T. kanzawai. To address this question, I analyzed paternity in the progeny of T. kanzawai females that had been observed to copulate with two males by using a microsatellite DNA marker. In this study, mating was allowed to take place without experimental interruption. The results show that progenies were sired by both males in only 1 of 14 families, whereas progeny were sired only by the first males in the other families. This result suggests that only the first mating would be, by and large, effective in T. kanzawai.
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Affiliation(s)
- Keiko Oku
- Laboratory of Evolutionary Ecology, Graduate School of Environmental Science, Okayama University, Okayama, 700-8530, Japan.
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Matsumoto T, Aoba T, Oku K, Asai T, Abe D, Takahashi Y, Sonoda M, Inoue D. The prevention of the cervical spinal cord injury by the start diving at the Masters swimming meet in Japan. J Sci Med Sport 2006. [DOI: 10.1016/j.jsams.2006.12.091] [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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Oku K, Yano S, Takafuji A. Host plant acceptance by the phytophagous mite Tetranychus kanzawai Kishida is affected by the availability of a refuge on the leaf surface. Ecol Res 2005. [DOI: 10.1007/s11284-005-0141-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Abstract
When a predatory mite, Amblyseius womersleyi is present, Tetranychus kanzawai takes refuge on its webs during a quiescent stage. To examine the factors responsible for the antipredator behavior of T. kanzawai, we exposed T. kanzawai to the odor of conspecifics, A. womersleyi, and both T. kanzawai and A. womersleyi. The proportion of T. kanzawai females that took refuge was significantly higher when they were exposed to the odor of 'both T. kanzawai and A. womersleyi.' Furthermore, the proportion of T. kanzawai females that took refuge was significantly higher when they were exposed to injured conspecifics than to intact conspecifics. These results suggest that T. kanzawai assesses predation risk, at least in part, by using the odor of injured conspecifics.
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Affiliation(s)
- Keiko Oku
- Laboratory of Ecological Information, Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan.
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45
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Oku K, Atsumi T, Furukawa S, Horita T, Sakai Y, Jodo S, Amasaki Y, Ichikawa K, Amengual O, Koike T. Cerebral imaging by magnetic resonance imaging and single photon emission computed tomography in systemic lupus erythematosus with central nervous system involvement. Rheumatology (Oxford) 2003; 42:773-7. [PMID: 12730538 DOI: 10.1093/rheumatology/keg216] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.8] [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: 11/14/2022] Open
Abstract
OBJECTIVE To assess the significance of magnetic resonance imaging (MRI) and single photon emission computed tomography (SPECT) abnormalities in patients with systemic lupus erythematosus (SLE). METHODS Forty-four patients with SLE were retrospectively analysed. Patients were classified into three groups [1 and 2: patients with central nervous system (CNS) manifestations before and after starting high-dose steroid therapy, respectively; 3: patients without CNS manifestations. MRI was performed in all 44 patients and SPECT in 31. RESULTS Abnormal findings in MRI were found in 19 patients. MRI abnormalities were significantly more frequent in patients with CNS manifestations than in those without [71 vs 17%, odds ratio (OR) 11.9, confidence interval (CI) 2.8-49.9, P=0.0003]. After the initiation of steroid therapy, patients with CNS manifestations also had an increased frequency of abnormal MRI. No correlation was found between SPECT findings and CNS manifestations. However, patients with CNS manifestations after starting steroids showed a markedly increased frequency of abnormal MRI and SPECT compared with those without CNS manifestations (80 vs 7%; OR 56, CI 4.4-719, P=0.0003). The positive predictive value of abnormality in both techniques in developing CNS manifestations after starting steroids was 89%. CONCLUSION MRI findings correlated with CNS manifestations in SLE. Where there is a high suspicion of CNS involvement, the combination of MRI and SPECT may be useful in predicting CNS manifestations after starting steroid therapy.
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Affiliation(s)
- K Oku
- Department of Medicine II, Hokkaido University School of Medicine, N15 W7, Kita-ku, Sapporo 060-8638, Japan
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Izumi Y, Kaneko A, Oku K, Kimura M, Tanaka S, Tada H, Tatsumi K, Takano T, Hidaka Y, Amino N. Development of liver dysfunction after delivery is possibly due to postpartum autoimmune hepatitis. A report of three cases. J Intern Med 2002; 252:361-7. [PMID: 12366609 DOI: 10.1046/j.1365-2796.2002.01047.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Autoimmune diseases, especially autoimmune thyroid disease, frequently develop after delivery due to the immune rebound mechanism. Most cases involve transient dysfunction of affected organs. We examined three patients who developed liver dysfunction after delivery. They were all diagnosed with definite or probable autoimmune hepatitis using the scoring system of the International Autoimmune Hepatitis Group. Moreover, all of them had anti-CYP2D6 antibodies detected by a sensitive radioligand assay. Our findings strongly suggest that liver dysfunction is induced by postpartum autoimmune hepatitis, and clinicians should be aware of this disease.
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Affiliation(s)
- Y Izumi
- Department of Laboratory Medicine, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka 565-0871, Japan.
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Yamanaka T, Oku K, Koyama H, Mizuno Y. Time-related changes of the cardiovascular system during maintenance anesthesia with sevoflurane and isoflurane in horses. J Vet Med Sci 2001; 63:527-32. [PMID: 11411498 DOI: 10.1292/jvms.63.527] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [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: 11/22/2022] Open
Abstract
To clarify time-related changes in equine cardiovascular system during maintenance anesthesia (180 min, 1.2 minimum alveolar concentration) with sevoflurane (Sev-group) compared to isoflurane (Iso-group) as the basis for clinical use of Sev, horses were examined for the heart rate (HR), mean arterial pressure (MAP), cardiac index (CI), systemic vascular resistance (SVR) and pre-ejection period (PEP)/ejection time (ET) that is an index of the cardiac contractility. The HR was almost 30 beats/min in both groups without significant temporal change. MAP was significantly elevated with time but there was no significant difference between the groups. In the Sev-group, CI remained unchanged but the significant increase of CI with time was observed in the Iso-group. In the Sev-group SVR was significantly higher than that of the Iso-group and increased with time. No significant difference of PEP/ET was seen between the groups, but PEP/ET lowered with time in the Iso-group in association with prolonged ET. The results indicated that the time-dependent elevation of MAP in the Sev-group reflected increased SVR without increase of CI and that it reflected increased CI resulting from increased stroke volume in the Iso-group in association with lowered PEP/ET, that is, increased cardiac contractility.
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Affiliation(s)
- T Yamanaka
- Racehorse Clinic, Japan Racing Association Miho Training Center, Ibaraki
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Abstract
Microscopic polyangiitis (MPA) is associated with renal dysfunction, in most cases, and occasionally with pulmonary hemorrhage. However, massive intestinal bleeding is a rare manifestation. We report a case of MPA in a man who developed arterial bleeding in the small intestine. A 74-year-old man was admitted after enduring a fever for 4 weeks. Laboratory examination revealed leucocytosis with neutrophil predominance, and renal dysfunction was noted. He did not respond to treatment with antibiotics, and the worsened renal function soon required hemodialysis. On the seventh hospital day, he suddenly developed massive melena. A colonoscopic examination suggested bleeding in the small intestine, and abdominal angiography demonstrated that the bleeding originated in a branch of the ileal artery. Hemostasis was achieved by transarterial embolization (TAE), but the patient suffered a massive pulmonary hemorrhage 2 days after the TAE. Although he responded well to a combination treatment with corticosteroid and cyclophosphamide, recurrence of pulmonary hemorrhage led to death, on the 87th hospital day. MPA in this patient was associated with three serious complications; deteriorating renal function, massive melena, and pulmonary hemorrhage. Of the various manifestations associated with MPA, arterial bleeding in the gastrointestinal tract, although rare, should be considered as one of the serious complications in MPA.
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Affiliation(s)
- S Ueda
- Department of Internal Medicine, Nara Prefectural Gojo Hospital, Japan
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Abstract
Eighty-five thoroughbred racehorses with various types of fracture were subjected to arthroscopic surgery (44 horses) or internal fixation (41 horses) under sevoflurane anesthesia. The mean end-tidal sevoflurane concentration during anesthesia ranged from 2.5 to 2.8%. PaCO2 was maintained between 50 and 65 mmHg by controlled ventilation. The mean arterial blood pressure was maintained above 65 mmHg by infusion of dobutamine and fluids, however, heart rate significantly increased with time. Recovery from anesthesia was calm and smooth in almost all cases. No apparent complication was observed during and after anesthesia in all cases. Therefore, sevoflurane anesthesia is considered to be safe and useful for orthopedic surgery in racehorses.
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Affiliation(s)
- M Ohta
- Racehorse Clinic, Japan Racing Association Miho Training Center, Ibaraki-ken
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Saito Y, Ito M, Ozawa Y, Obonai T, Kobayashi Y, Washizawa K, Ohsone Y, Takami T, Oku K, Takashima S. Changes of neurotransmitters in the brainstem of patients with respiratory-pattern disorders during childhood. Neuropediatrics 1999; 30:133-40. [PMID: 10480208 DOI: 10.1055/s-2007-973478] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
We examined neuropathologically and immunohistochemically the respiratory centers in the brainstem of two patients with Joubert syndrome (JS), three patients with congenital central hypoventilation syndrome (CCHS) and a patient with apneustic breathing (prolonged inspiratory pause) due to unknown etiology. Immunoreactivity (IR) of tryptophan hydroxylase (TPH) was decreased in the dorsal raphe nuclei of two patients with JS compared with age-matched controls, as well as in two patients with Dandy-Walker malformation. The two JS patients showed vermian defect and elongated cerebellar peduncles, and peculiar vascularities in the midline of the whole brainstem were also noted in one of these patients. These findings, as a whole, confirm that the midline structures of brainstem are disordered both structurally and functionally in JS, conceivably resulting in respiratory patterns and psychomotor deficits. IR of serotonin 1A receptor showed no significant changes in the medulla oblongata of these patients, however. In the parabrachial complex, IR of substance P was increased in two patients with CCHS, and one with apneustic breathing. IR of tyrosine hydroxylase was also increased in the latter. The brainstem of these patients showed reactive astrogliosis. These findings suggest preceding hypoxic episodes as well as an increased activity in the parabrachial complex which plays an important role in conducting the driving force to the medullary respiratory neurons from ascending sensory pathways.
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Affiliation(s)
- Y Saito
- Department of Mental Retardation and Birth Defect Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Kodaira, Tokyo, Japan
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