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Arita R, Yabusaki K, Hirono T, Yamauchi T, Ichihashi T, Fukuoka S, Morishige N. Automated Measurement of Tear Meniscus Height with the Kowa DR-1α Tear Interferometer in Both Healthy Subjects and Dry Eye Patients. Invest Ophthalmol Vis Sci 2019; 60:2092-2101. [PMID: 31091317 DOI: 10.1167/iovs.18-24850] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Purpose To develop and assess a method for quantitation of lower tear meniscus height (TMH) with the Kowa DR-1α tear interferometer. Methods Sixty-nine eyes of 49 men and 20 women (36 healthy volunteers, 33 patients with aqueous-deficient dry eye [ADDE]; mean age ± SD, 50.0 ± 14.0 years) were enrolled. TMH of each subject was measured by two observers both with DR-1α and newly developed software and with anterior-segment swept-source optical coherence tomography (SS-OCT). Intraoperator repeatability and interoperator and intersession reproducibility of measurements were assessed based on the within-subject SD (Sw), coefficient of variation (CV), and intraclass correlation coefficient (ICC). Agreement between the two devices was assessed by regression and Bland-Altman analysis. Results The CV for system repeatability of DR-1α was <2.0%. The CV for intraoperator repeatability and interoperator and intersession reproducibility for DR-1α measurements was ≤9.6%, ≤4.5%, and ≤4.4% in healthy subjects, respectively, and ≤16.8%, ≤9.8%, and ≤10.3% in ADDE patients. All corresponding ICC values were ≥0.87 in healthy subjects and ≥0.48 in ADDE patients. Bland-Altman plots indicated a high level of agreement between the two devices. Schirmer test value was significantly correlated with interferometric TMH in both healthy subjects (β = 0.59, P < 0.001) and ADDE patients (β = 0.47, P = 0.017). Conclusions Tear interferometry allows measurement of TMH as reliably as does SS-OCT. DR-1α may inform not only the diagnosis of dry eye disease but also identification of disease subtype.
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Affiliation(s)
- Reiko Arita
- Itoh Clinic, Saitama, Japan.,Lid and Meibomian Gland Working Group (LIME), Tokyo, Japan
| | | | | | | | | | - Shima Fukuoka
- Lid and Meibomian Gland Working Group (LIME), Tokyo, Japan.,Omiya Hamada Eye Clinic, Saitama, Japan
| | - Naoyuki Morishige
- Lid and Meibomian Gland Working Group (LIME), Tokyo, Japan.,Division of Cornea and Ocular Surface, Ohshima Eye Hospital, Fukuoka, Japan
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Yabusaki K, Hutcheson JD, Vyas P, Bertazzo S, Body SC, Aikawa M, Aikawa E. Quantification of Calcified Particles in Human Valve Tissue Reveals Asymmetry of Calcific Aortic Valve Disease Development. Front Cardiovasc Med 2016; 3:44. [PMID: 27867942 PMCID: PMC5095138 DOI: 10.3389/fcvm.2016.00044] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Accepted: 10/14/2016] [Indexed: 12/17/2022] Open
Abstract
Recent studies indicated that small calcified particles observable by scanning electron microscopy (SEM) may initiate calcification in cardiovascular tissues. We hypothesized that if the calcified particles precede gross calcification observed in calcific aortic valve disease (CAVD), they would exhibit a regional asymmetric distribution associated with CAVD development, which always initiates at the base of aortic valve leaflets adjacent to the aortic outflow in a region known as the fibrosa. Testing this hypothesis required counting the calcified particles in histological sections of aortic valve leaflets. SEM images, however, do not provide high contrast between components within images, making the identification and quantification of particles buried within tissue extracellular matrix difficult. We designed a new unique pattern-matching based technique to allow for flexibility in recognizing particles by creating a gap zone in the detection criteria that decreased the influence of non-particle image clutter in determining whether a particle was identified. We developed this flexible pattern particle-labeling (FpPL) technique using synthetic test images and human carotid artery tissue sections. A conventional image particle counting method (preinstalled in ImageJ) did not properly recognize small calcified particles located in noisy images that include complex extracellular matrix structures and other commonly used pattern-matching methods failed to detect the wide variation in size, shape, and brightness exhibited by the particles. Comparative experiments with the ImageJ particle counting method demonstrated that our method detected significantly more (p < 2 × 10-7) particles than the conventional method with significantly fewer (p < 0.0003) false positives and false negatives (p < 0.0003). We then applied the FpPL technique to CAVD leaflets and showed a significant increase in detected particles in the fibrosa at the base of the leaflets (p < 0.0001), supporting our hypothesis. The outcomes of this study are twofold: (1) development of a new image analysis technique that can be adapted to a wide range of applications and (2) acquisition of new insight on potential early mediators of calcification in CAVD.
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Affiliation(s)
- Katsumi Yabusaki
- Division of Cardiovascular Medicine, Center for Interdisciplinary Cardiovascular Sciences (CICS), Brigham and Women's Hospital, Harvard Medical School , Boston, MA , USA
| | - Joshua D Hutcheson
- Division of Cardiovascular Medicine, Center for Interdisciplinary Cardiovascular Sciences (CICS), Brigham and Women's Hospital, Harvard Medical School , Boston, MA , USA
| | - Payal Vyas
- Division of Cardiovascular Medicine, Center for Interdisciplinary Cardiovascular Sciences (CICS), Brigham and Women's Hospital, Harvard Medical School , Boston, MA , USA
| | - Sergio Bertazzo
- Department of Medical Physics and Biomedical Engineering, University College London , London , UK
| | - Simon C Body
- Center for Perioperative Genomics, Brigham and Women's Hospital, Boston, MA, USA; Department of Anesthesiology, Brigham and Women's Hospital, Boston, MA, USA
| | - Masanori Aikawa
- Division of Cardiovascular Medicine, Center for Interdisciplinary Cardiovascular Sciences (CICS), Brigham and Women's Hospital, Harvard Medical School , Boston, MA , USA
| | - Elena Aikawa
- Division of Cardiovascular Medicine, Center for Interdisciplinary Cardiovascular Sciences (CICS), Brigham and Women's Hospital, Harvard Medical School , Boston, MA , USA
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Hutcheson JD, Goettsch C, Bertazzo S, Maldonado N, Ruiz JL, Goh W, Yabusaki K, Faits T, Bouten C, Franck G, Quillard T, Libby P, Aikawa M, Weinbaum S, Aikawa E. Genesis and growth of extracellular-vesicle-derived microcalcification in atherosclerotic plaques. Nat Mater 2016; 15:335-43. [PMID: 26752654 PMCID: PMC4767675 DOI: 10.1038/nmat4519] [Citation(s) in RCA: 254] [Impact Index Per Article: 31.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2014] [Accepted: 11/24/2015] [Indexed: 05/26/2023]
Abstract
Clinical evidence links arterial calcification and cardiovascular risk. Finite-element modelling of the stress distribution within atherosclerotic plaques has suggested that subcellular microcalcifications in the fibrous cap may promote material failure of the plaque, but that large calcifications can stabilize it. Yet the physicochemical mechanisms underlying such mineral formation and growth in atheromata remain unknown. Here, by using three-dimensional collagen hydrogels that mimic structural features of the atherosclerotic fibrous cap, and high-resolution microscopic and spectroscopic analyses of both the hydrogels and of calcified human plaques, we demonstrate that calcific mineral formation and maturation results from a series of events involving the aggregation of calcifying extracellular vesicles, and the formation of microcalcifications and ultimately large calcification areas. We also show that calcification morphology and the plaque's collagen content-two determinants of atherosclerotic plaque stability-are interlinked.
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Affiliation(s)
- Joshua D. Hutcheson
- Center for Interdisciplinary Cardiovascular Sciences, Cardiovascular Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, USA
| | - Claudia Goettsch
- Center for Interdisciplinary Cardiovascular Sciences, Cardiovascular Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, USA
| | - Sergio Bertazzo
- Department of Medical Physics & Biomedical Engineering, University College London, London, UK
| | - Natalia Maldonado
- Center for Interdisciplinary Cardiovascular Sciences, Cardiovascular Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, USA
| | - Jessica L. Ruiz
- Center for Interdisciplinary Cardiovascular Sciences, Cardiovascular Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, USA
| | - Wilson Goh
- Center for Interdisciplinary Cardiovascular Sciences, Cardiovascular Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, USA
| | - Katsumi Yabusaki
- Center for Interdisciplinary Cardiovascular Sciences, Cardiovascular Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, USA
| | - Tyler Faits
- Center for Interdisciplinary Cardiovascular Sciences, Cardiovascular Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, USA
| | - Carlijn Bouten
- Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Gregory Franck
- Center for Excellence in Vascular Biology, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, USA
| | - Thibaut Quillard
- Center for Excellence in Vascular Biology, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, USA
| | - Peter Libby
- Center for Excellence in Vascular Biology, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, USA
| | - Masanori Aikawa
- Center for Interdisciplinary Cardiovascular Sciences, Cardiovascular Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, USA
- Center for Excellence in Vascular Biology, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, USA
| | - Sheldon Weinbaum
- Department of Biomedical Engineering, City College of New York, New York, NY, USA
| | - Elena Aikawa
- Center for Interdisciplinary Cardiovascular Sciences, Cardiovascular Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, USA
- Center for Excellence in Vascular Biology, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, USA
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Ricchiuto P, Iwata H, Yabusaki K, Yamada I, Pieper B, Sharma A, Aikawa M, Singh SA. mIMT-visHTS: A novel method for multiplexing isobaric mass tagged datasets with an accompanying visualization high throughput screening tool for protein profiling. J Proteomics 2015; 128:132-40. [PMID: 26232111 DOI: 10.1016/j.jprot.2015.07.024] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2014] [Revised: 06/26/2015] [Accepted: 07/20/2015] [Indexed: 12/12/2022]
Abstract
Isobaric mass tagging (IMT) methods enable the analysis of thousands of proteins simultaneously. We used tandem mass tagging reagents (TMT™) to monitor the relative changes in the proteome of the mouse macrophage cell line RAW264.7 at the same six time points after no stimulation (baseline phenotype), stimulation with interferon gamma (pro-inflammatory phenotype) or stimulation with interleukin-4 (anti-inflammatory phenotype). The combined TMT datasets yielded nearly 12,000 protein profiles for comparison. To facilitate this large analysis, we developed a novel method that combines or multiplexes the separate IMT (mIMT) datasets into a single super dataset for subsequent model-based clustering and co-regulation analysis. Specially designed visual High Throughput Screening (visHTS) software screened co-regulated proteins. visHTS generates an interactive and visually intuitive color-coded bullseye plot that enables users to browse the cluster outputs and identify co-regulated proteins.
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Affiliation(s)
- Piero Ricchiuto
- Center for Interdisciplinary Cardiovascular Sciences, Division of Cardiovascular Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Hiroshi Iwata
- Center for Interdisciplinary Cardiovascular Sciences, Division of Cardiovascular Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Katsumi Yabusaki
- Center for Interdisciplinary Cardiovascular Sciences, Division of Cardiovascular Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Iwao Yamada
- Center for Interdisciplinary Cardiovascular Sciences, Division of Cardiovascular Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Brett Pieper
- Center for Interdisciplinary Cardiovascular Sciences, Division of Cardiovascular Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Amitabh Sharma
- Channing Division of Network Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Masanori Aikawa
- Center for Interdisciplinary Cardiovascular Sciences, Division of Cardiovascular Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA; Channing Division of Network Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Sasha A Singh
- Center for Interdisciplinary Cardiovascular Sciences, Division of Cardiovascular Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA.
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Sasaki Y, Ohta M, Desai D, Figueiredo JL, Whelan MC, Sugano T, Yamabi M, Yano W, Faits T, Yabusaki K, Zhang H, Mlynarchik AK, Inoue K, Mizuno K, Aikawa M. Angiopoietin Like Protein 2 (ANGPTL2) Promotes Adipose Tissue Macrophage and T lymphocyte Accumulation and Leads to Insulin Resistance. PLoS One 2015; 10:e0131176. [PMID: 26132105 PMCID: PMC4489192 DOI: 10.1371/journal.pone.0131176] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2015] [Accepted: 05/31/2015] [Indexed: 02/07/2023] Open
Abstract
OBJECTIVES Angiopoietin-like protein 2 (ANGPTL2), a recently identified pro-inflammatory cytokine, is mainly secreted from the adipose tissue. This study aimed to explore the role of ANGPTL2 in adipose tissue inflammation and macrophage activation in a mouse model of diabetes. METHODOLOGY/PRINCIPAL FINDINGS Adenovirus mediated lacZ (Ad-LacZ) or human ANGPTL2 (Ad-ANGPTL2) was delivered via tail vein in diabetic db/db mice. Ad-ANGPTL2 treatment for 2 weeks impaired both glucose tolerance and insulin sensitivity as compared to Ad-LacZ treatment. Ad-ANGPTL2 treatment significantly induced pro-inflammatory gene expression in white adipose tissue. We also isolated stromal vascular fraction from epididymal fat pad and analyzed adipose tissue macrophage and T lymphocyte populations by flow cytometry. Ad-ANGPTL2 treated mice had more adipose tissue macrophages (F4/80+CD11b+) and a larger M1 macrophage subpopulation (F4/80+CD11b+CD11c+). Moreover, Ad-ANGPTL2 treatment increased a CD8-positive T cell population in adipose tissue, which preceded increased macrophage accumulation. Consistent with our in vivo results, recombinant human ANGPTL2 protein treatment increased mRNA levels of pro-inflammatory gene products and production of TNF-α protein in the human macrophage-like cell line THP-1. Furthermore, Ad-ANGPTL2 treatment induced lipid accumulation and increased fatty acid synthesis, lipid metabolism related gene expression in mouse liver. CONCLUSION ANGPTL2 treatment promotes macrophage accumulation and activation. These results suggest potential mechanisms for insulin resistance.
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Affiliation(s)
- Yusuke Sasaki
- Center for Interdisciplinary Cardiovascular Sciences, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
- Tokyo New Drug Research Laboratories, Kowa Company, Ltd., Tokyo, Japan
| | - Masayuki Ohta
- Center for Interdisciplinary Cardiovascular Sciences, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
- Tokyo New Drug Research Laboratories, Kowa Company, Ltd., Tokyo, Japan
| | - Dhruv Desai
- Center for Interdisciplinary Cardiovascular Sciences, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Jose-Luiz Figueiredo
- Center for Interdisciplinary Cardiovascular Sciences, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Mary C. Whelan
- Center for Interdisciplinary Cardiovascular Sciences, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Tomohiro Sugano
- Center for Interdisciplinary Cardiovascular Sciences, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
- Tokyo New Drug Research Laboratories, Kowa Company, Ltd., Tokyo, Japan
| | - Masaki Yamabi
- Center for Interdisciplinary Cardiovascular Sciences, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
- Tokyo New Drug Research Laboratories, Kowa Company, Ltd., Tokyo, Japan
| | - Wataru Yano
- Center for Interdisciplinary Cardiovascular Sciences, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
- Tokyo New Drug Research Laboratories, Kowa Company, Ltd., Tokyo, Japan
| | - Tyler Faits
- Center for Interdisciplinary Cardiovascular Sciences, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Katsumi Yabusaki
- Center for Interdisciplinary Cardiovascular Sciences, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
- Tokyo New Drug Research Laboratories, Kowa Company, Ltd., Tokyo, Japan
| | - Hengmin Zhang
- Center for Interdisciplinary Cardiovascular Sciences, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Andrew K. Mlynarchik
- Center for Interdisciplinary Cardiovascular Sciences, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Keisuke Inoue
- Center for Interdisciplinary Cardiovascular Sciences, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
- Tokyo New Drug Research Laboratories, Kowa Company, Ltd., Tokyo, Japan
| | - Ken Mizuno
- Center for Interdisciplinary Cardiovascular Sciences, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
- Tokyo New Drug Research Laboratories, Kowa Company, Ltd., Tokyo, Japan
| | - Masanori Aikawa
- Center for Interdisciplinary Cardiovascular Sciences, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
- * E-mail:
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Yabusaki K, Faits T, McMullen E, Figueiredo JL, Aikawa M, Aikawa E. A novel quantitative approach for eliminating sample-to-sample variation using a hue saturation value analysis program. PLoS One 2014; 9:e89627. [PMID: 24595280 PMCID: PMC3940696 DOI: 10.1371/journal.pone.0089627] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2013] [Accepted: 01/21/2014] [Indexed: 12/22/2022] Open
Abstract
OBJECTIVES As computing technology and image analysis techniques have advanced, the practice of histology has grown from a purely qualitative method to one that is highly quantified. Current image analysis software is imprecise and prone to wide variation due to common artifacts and histological limitations. In order to minimize the impact of these artifacts, a more robust method for quantitative image analysis is required. METHODS AND RESULTS Here we present a novel image analysis software, based on the hue saturation value color space, to be applied to a wide variety of histological stains and tissue types. By using hue, saturation, and value variables instead of the more common red, green, and blue variables, our software offers some distinct advantages over other commercially available programs. We tested the program by analyzing several common histological stains, performed on tissue sections that ranged from 4 µm to 10 µm in thickness, using both a red green blue color space and a hue saturation value color space. CONCLUSION We demonstrated that our new software is a simple method for quantitative analysis of histological sections, which is highly robust to variations in section thickness, sectioning artifacts, and stain quality, eliminating sample-to-sample variation.
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Affiliation(s)
- Katsumi Yabusaki
- Center for Interdisciplinary Cardiovascular Sciences, Division of Cardiovascular Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Tyler Faits
- Center for Interdisciplinary Cardiovascular Sciences, Division of Cardiovascular Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Eri McMullen
- Center for Interdisciplinary Cardiovascular Sciences, Division of Cardiovascular Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Jose Luiz Figueiredo
- Center for Interdisciplinary Cardiovascular Sciences, Division of Cardiovascular Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Masanori Aikawa
- Center for Interdisciplinary Cardiovascular Sciences, Division of Cardiovascular Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
- Center for Excellence in Vascular Biology, Division of Cardiovascular Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Elena Aikawa
- Center for Interdisciplinary Cardiovascular Sciences, Division of Cardiovascular Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
- Center for Excellence in Vascular Biology, Division of Cardiovascular Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
- * E-mail:
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New SE, Goettsch C, Aikawa M, Marchini JF, Shibasaki M, Yabusaki K, Libby P, Shanahan CM, Croce K, Aikawa E. Macrophage-derived matrix vesicles: an alternative novel mechanism for microcalcification in atherosclerotic plaques. Circ Res 2013; 113:72-7. [PMID: 23616621 PMCID: PMC3703850 DOI: 10.1161/circresaha.113.301036] [Citation(s) in RCA: 310] [Impact Index Per Article: 28.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
RATIONALE We previously showed that early calcification of atherosclerotic plaques associates with macrophage accumulation. Chronic renal disease and mineral imbalance accelerate calcification and the subsequent release of matrix vesicles (MVs), precursors of microcalcification. OBJECTIVE We tested the hypothesis that macrophage-derived MVs contribute directly to microcalcification. METHODS AND RESULTS Macrophages associated with regions of calcified vesicular structures in human carotid plaques (n=136 patients). In vitro, macrophages released MVs with high calcification and aggregation potential. MVs expressed exosomal markers (CD9 and TSG101) and contained S100A9 and annexin V. Silencing S100A9 in vitro and genetic deficiency in S100A9-/- mice reduced MV calcification, whereas stimulation with S100A9 increased calcification potential. Externalization of phosphatidylserine after Ca/P stimulation and interaction of S100A9 and annexin V indicated that a phosphatidylserine-annexin V-S100A9 membrane complex facilitates hydroxyapatite nucleation within the macrophage-derived MV membrane. CONCLUSIONS Our results support the novel concept that macrophages release calcifying MVs enriched in S100A9 and annexin V, which contribute to accelerated microcalcification in chronic renal disease.
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Affiliation(s)
- Sophie E. New
- Center for Interdisciplinary Cardiovascular Sciences, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA
| | - Claudia Goettsch
- Center for Interdisciplinary Cardiovascular Sciences, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA
| | - Masanori Aikawa
- Center for Interdisciplinary Cardiovascular Sciences, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA
- Cardiovascular Division and Center for Excellence in Vascular Biology, Cardiovascular Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA
| | - Julio F. Marchini
- Cardiovascular Division and Center for Excellence in Vascular Biology, Cardiovascular Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA
| | - Manabu Shibasaki
- Center for Interdisciplinary Cardiovascular Sciences, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA
| | - Katsumi Yabusaki
- Center for Interdisciplinary Cardiovascular Sciences, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA
| | - Peter Libby
- Cardiovascular Division and Center for Excellence in Vascular Biology, Cardiovascular Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA
| | | | - Kevin Croce
- Cardiovascular Division and Center for Excellence in Vascular Biology, Cardiovascular Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA
| | - Elena Aikawa
- Center for Interdisciplinary Cardiovascular Sciences, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA
- Cardiovascular Division and Center for Excellence in Vascular Biology, Cardiovascular Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA
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Yabusaki K, Aoyagi H. Simplified preparation of crude and functional coagulogen by thermal inactivation of serine proteases in Limulus amebocyte lysate and its application for rapid endotoxin determination. J Biosci Bioeng 2012; 113:406-11. [DOI: 10.1016/j.jbiosc.2011.11.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2011] [Revised: 11/01/2011] [Accepted: 11/02/2011] [Indexed: 11/15/2022]
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Asano T, Yabusaki K, Wang PC, Iwasaki A. Determination of lead(II) in fly ash leachate using a newly developed simple spectrophotometric method. Spectrochim Acta A Mol Biomol Spectrosc 2010; 75:819-824. [PMID: 20042364 DOI: 10.1016/j.saa.2009.12.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2009] [Revised: 11/24/2009] [Accepted: 12/01/2009] [Indexed: 05/28/2023]
Abstract
A new simple method for the spectrophotometric determination of Pb(II) in fly ash leachates was developed. These leachates tend to contain a large amount of Ca(II) and Zn(II); this interferes with spectrophotometric determination of Pb(II) when conventional colorimetric agents are used. A copolymer consisting of protoporphyrin IX disodium salt and acrylamide was synthesized as a colorimetric agent. A measuring reagent containing ethylenediamine-N,N'-dipropionic acid (EDDP) as a masking agent for Zn(II) and an appropriate amount of Ca(II) together with the copolymer was applied to determine Pb(II). The temporal change in the absorption spectrum of the measuring reagent was acquired with a newly developed portable spectrophotometer for this method. The composition of EDDP and Ca(II) in the measuring reagent was optimized to measure leachates contaminated with Ca(II) and Zn(II). The detection limit and relative standard deviation of Pb(II) measured using the optimized method were 0.05 mg L(-1) and 2.3%, respectively. The tolerance limits for Ca(II) and Zn(II) contaminants, where errors of less than 10% were allowed at a concentration of 0.5 mg L(-1) Pb(II), were 4000 and 4 mg L(-1), respectively. The determination of Pb(II) in various samples of actual leachates from incinerator fly ash was examined with this method. The obtained values correlated well with those obtained by flame atomic absorption spectroscopy.
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Affiliation(s)
- Takaharu Asano
- Kowa Research Institute, Kowa Co., Ltd., 1-25-5 Kannondai, Tsukuba, Ibaraki 305-0856, Japan.
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Mitsumoto K, Yabusaki K, Kobayashi K, Shirasawa Y, Obata T. Novel endotoxin assay by laser light-scattering particle-counting method. J Clin Lab Anal 2009; 23:117-24. [PMID: 19288445 DOI: 10.1002/jcla.20300] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
Exposure of Limulus amoebocyte lysate to endotoxin under stirring produced light-reflective particles that appeared to be coagulin polymers. A laser light-scattering particle counter, the PA-200, detected these particles sensitively. The PA-200 detected endotoxin at a concentration as low as 0.00015 EU/ml in 71 min, whereas the minimum endotoxin concentration measured by a turbidimeter, ET-2000, was 0.0005 EU/ml in 138 min. Moreover, PA-200 was much less affected by the presence of colored substances and refractive materials than was ET-2000. We propose that the high sensitivity, speed, and high interference tolerance of the laser light-scattering particle-counting method make it more useful than the widely used turbidimetric method for quantitative endotoxin assay.
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Affiliation(s)
- Kotaro Mitsumoto
- Electronics and Optics Research Laboratories, Kowa Company Ltd., 3-3-1 Chofugaoka, Chofu, Tokyo, Japan.
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Mitsumoto K, Yabusaki K, Aoyagi H. Classification of pollen species using autofluorescence image analysis. J Biosci Bioeng 2009; 107:90-4. [DOI: 10.1016/j.jbiosc.2008.10.001] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2008] [Accepted: 10/27/2008] [Indexed: 11/30/2022]
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Hara C, Empey‐Campora C, Yabusaki K, Kuribayashi T, Siu N, Hokama Y. “Acute Phase Lipids” associated with phospholipids of Cardiolipins in sera of patients with Chronic Fatigue Syndrome (CFS) and other diseases. FASEB J 2007. [DOI: 10.1096/fasebj.21.6.a767-c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Cynthia Hara
- Department of PathologyJohn A. Burns School of Medicine1960 East‐West Rd.HonoluluHI96822
| | - C. Empey‐Campora
- Department of PathologyJohn A. Burns School of Medicine1960 East‐West Rd.HonoluluHI96822
| | - K. Yabusaki
- Department of PathologyJohn A. Burns School of Medicine1960 East‐West Rd.HonoluluHI96822
| | - T. Kuribayashi
- Department of PathologyJohn A. Burns School of Medicine1960 East‐West Rd.HonoluluHI96822
| | - N. Siu
- Department of PathologyJohn A. Burns School of Medicine1960 East‐West Rd.HonoluluHI96822
| | - Y. Hokama
- Department of PathologyJohn A. Burns School of Medicine1960 East‐West Rd.HonoluluHI96822
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Abstract
Hypertrophy is induced in skeletal muscle when mechanical overload, for example repetitive stretching, is presented. This is a well-known phenomenon and the molecular mechanism involved has been investigated from various aspects. In this study, with a system that enables periodic stretching of cultured skeletal muscle cells, myotubes, along the long cellular axis uni-directionally at a constant frequency, we examined the effects of stretching on skeletal muscle using mouse C2 myotubes in culture as a model. Significant hypertrophy was observed in the myotubes after several days of periodic stretching and this was accompanied by the accumulation of a protein of about 67kDa. This protein was identified with albumin, which was present in the culture medium, based on its antigenicity, size and pI. When bovine serum albumin tagged with biotin was added to the culture medium, it became detectable in the cytoplasm of the stretched myotubes. mRNA encoding albumin was not detectable in the myotubes by northern blotting irrespective of their stretching or non-stretching, indicating that transcription of the albumin gene was not induced in the stretched muscle cells. From these results, we conclude that the accumulation of albumin in stretched myotubes was due to uptake of the protein from the culture medium not to de novo synthesis of the protein in myotubes. We suggest that albumin uptake may be involved in skeletal muscular hypertrophy.
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MESH Headings
- Animals
- Blotting, Northern
- Blotting, Western
- Cells, Cultured
- Culture Media
- Electrophoresis, Polyacrylamide Gel
- Mice
- Muscle Fibers, Skeletal/cytology
- Muscle Fibers, Skeletal/metabolism
- Muscle Fibers, Skeletal/physiology
- Muscle, Skeletal/cytology
- Muscle, Skeletal/metabolism
- Muscle, Skeletal/physiology
- Muscular Diseases/physiopathology
- RNA, Messenger/analysis
- Serum Albumin/pharmacokinetics
- Stress, Mechanical
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Affiliation(s)
- Ryota Adachi
- Department of Biology, Faculty of Science, Chiba University
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Nagahashi H, Yabusaki K, Matsui H, Hirono T, Yokokawa N, Satake M, Tadokoro K, Juji T. Improved sensitivity in the measurement of residual leukocytes in platelet products using an automated leukocyte counter. Vox Sang 2001; 79:34-9. [PMID: 10971212 DOI: 10.1159/000031203] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
BACKGROUND AND OBJECTIVES Leukocytes remaining in platelet concentrates may be responsible for side effects caused by platelet transfusion. A simple method of high sensitivity for determining trace numbers of leukocytes is currently needed. MATERIALS AND METHODS An automated leukocyte counter, the LD-1000, the principle of which is a combination of spinning down on the observation field of stained nuclei derived from a 100 microl neat sample and image digitization with a charge coupled device camera, was newly developed and tested for sensitivity and reproducibility. RESULTS While the theoretical lower limit of detection was 0.01 cells/microl, the limit of detection of the LD-1000 was verified to be 0.2 cells/microl. A good correlation (r = 0.86) was observed between the results obtained using the Nageotte method and the LD-1000. Repeated measurements also confirmed satisfactory reproducibility. CONCLUSIONS The instrument provides a new method of enumerating residual leukocytes in platelet products with better sensitivity and easier procedure compared to the Nageotte method and will be useful for quality assurance purposes at blood centers.
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Affiliation(s)
- H Nagahashi
- Japanese Red Cross Central Blood Center, Tokyo, Japan
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Nagahasi H, Yabusaki K, Matsui H, Hirono T, Yokokawa N, Satake M, Tadokoro K, Juji T. Improved Sensitivity in the Measurement of Residual Leukocytes in Platelet Products Using an Automated Leukocyte Counter. Vox Sang 2000. [DOI: 10.1046/j.1423-0410.2000.7910034.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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16
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Hayakawa K, Hosokawa A, Yabusaki K, Obinata T. Orientation of Smooth Muscle-Derived A10 Cells in Culture by Cyclic Stretching: Relationship between Stress Fiber Rearrangement and Cell Reorientation. Zoolog Sci 2000; 17:617-24. [DOI: 10.2108/zsj.17.617] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/1999] [Accepted: 01/20/2000] [Indexed: 11/17/2022]
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17
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Yabusaki K. [Analysis of manganese-induced platelet aggregation]. Rinsho Byori 1997; Suppl 104:89-98. [PMID: 9128369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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18
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Oda A, Miyakawa Y, Druker BJ, Ozaki K, Yabusaki K, Shirasawa Y, Handa M, Kato T, Miyazaki H, Shimosaka A, Ikeda Y. Thrombopoietin primes human platelet aggregation induced by shear stress and by multiple agonists. Blood 1996; 87:4664-70. [PMID: 8639835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Recombinant thrombopoietin has been reported to stimulate megakaryocytopoiesis and thrombopoiesis and it may be quite useful to treat patients with low platelet counts after chemotherapy. As little is known regarding the possible activation of platelets by thrombopoietin, we examined the effects of thrombopoietin on platelet aggregation induced by shear stress and various agonists in native plasma. Using hirudin as an anticoagulant, thrombopoietin (1 to 100 ng/mL) enhanced platelet aggregation induced by 2 micromol/L adenosine-diphosphate (ADP) in a dose dependent fashion. The enhancement was not affected by treatment of platelets with 1 mmol/L aspirin plus SQ-29548 (a thromboxane antagonist, 1 micromol/L) but was inhibited by a soluble form of the thrombopoietin receptor, suggesting that the enhancement was mediated by the specific receptors and does not require thromboxane production. Epinephrine (1 micromol/L), which does not induce platelet aggregation in hirudin platelet rich plasma (PRP), did so in the presence of thrombopoietin (10 ng/mL). Thrombopoietin (10 ng/mL) also enhanced or primed platelet aggregation induced by collagen (0.5 micron.mL),. thrombin, serotonin, and vasopressin. Thrombopoietin does not induce any rise in cytosolic ionized calcium concentration nor activation of protein kinase C, as estimated by phosphorylation of preckstrin, indicating that the priming effects of thrombopoietin does not require those processes. The ADP- or thrombin-induced rise in cytosolic ionized calcium concentration was not enhanced by thrombopoietin (100 ng/mL). Further, shear (ca. 90 dyn/cm2)-induced platelet aggregation was also potentiated by thrombopoietin. The priming effect on epinephrine-induced platelet aggregation in hirudin PRP was unique to thrombopoietin, with no effects seen using interleukin-6 (IL-6), IL-11, IL-3, erythropoietin, granulocyte-colony stimulating factor, granulocyte macrophage-colony stimulating factor, or c-kit ligand. These data indicate that monitoring of platelet functions may be necessary in the clinical trials of thrombopoietin.
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Affiliation(s)
- A Oda
- Division of Hematology, Department of Internal Medicine, Keio University, Tokyo, Japan
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Kaji T, Mishima A, Machida M, Yabusaki K, Suzuki M, Yamamoto C, Fujiwara Y, Sakamoto M, Kozuka H. Comparative cytotoxicity of exogenous cadmium-metallothionein and cadmium ion in cultured vascular endothelial cells. Bull Environ Contam Toxicol 1995; 54:501-506. [PMID: 7767026 DOI: 10.1007/bf00192591] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Affiliation(s)
- T Kaji
- Hokuriku University, Kanazawa, Japan
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