1
|
Schrijver DP, Dreu A, Hofstraat SRJ, Kluza E, Zwolsman R, Deckers J, Anbergen T, Bruin K, Trines MM, Nugraha EG, Ummels F, Röring RJ, Beldman TJ, Teunissen AJP, Fayad ZA, Meel R, Mulder WJM. Nanoengineering Apolipoprotein A1‐Based Immunotherapeutics. ADVANCED THERAPEUTICS 2021. [DOI: 10.1002/adtp.202100083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- David P. Schrijver
- Laboratory of Chemical Biology Department of Biomedical Engineering Eindhoven University of Technology Eindhoven 5612 AZ The Netherlands
| | - Anne Dreu
- Laboratory of Chemical Biology Department of Biomedical Engineering Eindhoven University of Technology Eindhoven 5612 AZ The Netherlands
| | - Stijn R. J. Hofstraat
- Laboratory of Chemical Biology Department of Biomedical Engineering Eindhoven University of Technology Eindhoven 5612 AZ The Netherlands
| | - Ewelina Kluza
- Laboratory of Chemical Biology Department of Biomedical Engineering Eindhoven University of Technology Eindhoven 5612 AZ The Netherlands
| | - Robby Zwolsman
- Laboratory of Chemical Biology Department of Biomedical Engineering Eindhoven University of Technology Eindhoven 5612 AZ The Netherlands
| | - Jeroen Deckers
- Laboratory of Chemical Biology Department of Biomedical Engineering Eindhoven University of Technology Eindhoven 5612 AZ The Netherlands
| | - Tom Anbergen
- Laboratory of Chemical Biology Department of Biomedical Engineering Eindhoven University of Technology Eindhoven 5612 AZ The Netherlands
| | - Koen Bruin
- Laboratory of Chemical Biology Department of Biomedical Engineering Eindhoven University of Technology Eindhoven 5612 AZ The Netherlands
| | - Mirre M. Trines
- Laboratory of Chemical Biology Department of Biomedical Engineering Eindhoven University of Technology Eindhoven 5612 AZ The Netherlands
| | - Eveline G. Nugraha
- Laboratory of Chemical Biology Department of Biomedical Engineering Eindhoven University of Technology Eindhoven 5612 AZ The Netherlands
| | - Floor Ummels
- Laboratory of Chemical Biology Department of Biomedical Engineering Eindhoven University of Technology Eindhoven 5612 AZ The Netherlands
| | - Rutger J. Röring
- Department of Internal Medicine and Radboud Center for Infectious diseases (RCI) Radboud University Nijmegen Medical Center Nijmegen 6525 GA The Netherlands
| | - Thijs J. Beldman
- Department of Internal Medicine and Radboud Center for Infectious diseases (RCI) Radboud University Nijmegen Medical Center Nijmegen 6525 GA The Netherlands
| | - Abraham J. P. Teunissen
- Biomedical Engineering and Imaging Institute Icahn School of Medicine at Mount Sinai New York NY 10029‐6574 USA
| | - Zahi A. Fayad
- Biomedical Engineering and Imaging Institute Icahn School of Medicine at Mount Sinai New York NY 10029‐6574 USA
| | - Roy Meel
- Laboratory of Chemical Biology Department of Biomedical Engineering Eindhoven University of Technology Eindhoven 5612 AZ The Netherlands
| | - Willem J. M. Mulder
- Laboratory of Chemical Biology Department of Biomedical Engineering Eindhoven University of Technology Eindhoven 5612 AZ The Netherlands
- Department of Internal Medicine and Radboud Center for Infectious diseases (RCI) Radboud University Nijmegen Medical Center Nijmegen 6525 GA The Netherlands
| |
Collapse
|
2
|
Lee YB, Choi KM. Diet-Modulated Lipoprotein Metabolism and Vascular Inflammation Evaluated by 18F-fluorodeoxyglucose Positron Emission Tomography. Nutrients 2018; 10:nu10101382. [PMID: 30274193 PMCID: PMC6212959 DOI: 10.3390/nu10101382] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Revised: 09/17/2018] [Accepted: 09/23/2018] [Indexed: 02/06/2023] Open
Abstract
Vascular inflammation plays a central role in atherosclerosis, from initiation and progression to acute thrombotic complications. Modified low-density lipoproteins (LDLs) and apoB-containing particles stimulate plaque inflammation by interacting with macrophages. Loss of function of high-density lipoprotein (HDL) for preventing LDL particles from oxidative modification in dyslipidemic states may amplify modified LDL actions, accelerating plaque inflammation. Diets are one of the most important factors that can affect these processes of lipoprotein oxidation and vascular inflammation. Recently, 18F-fluorodeoxyglucose (FDG) positron emission tomography (PET) has emerged as a reliable noninvasive imaging modality for identifying and quantifying vascular inflammation within atherosclerotic lesions based on the high glycolytic activity of macrophages infiltrating active atherosclerotic plaques. Vascular inflammation evaluated by FDG PET has been positively related to metabolic syndrome components and traditional risk factors of cardiovascular disease, including high-sensitivity C-reactive protein, body mass index, and insulin resistance. A positive association of vascular inflammation with endothelial dysfunction, resistin levels, pericardial adipose tissue, and visceral fat area has also been reported. In contrast, HDL cholesterol and adiponectin have been inversely related to vascular inflammation detected by FDG PET. Because of its reproducibility, serial FDG PET shows potential for tracking the effects of dietary interventions and other systemic and local antiatherosclerotic therapies for plaque inflammation.
Collapse
Affiliation(s)
- You-Bin Lee
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Korea University Guro Hospital, Korea University College of Medicine, 148 Gurodong-ro, Guro-gu, Seoul 08308, Korea.
| | - Kyung Mook Choi
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Korea University Guro Hospital, Korea University College of Medicine, 148 Gurodong-ro, Guro-gu, Seoul 08308, Korea.
| |
Collapse
|
3
|
|
4
|
Abstract
PURPOSE OF REVIEW Increasing interest has focused on the strategies that target the atheroprotective properties of HDL in order to reduce cardiovascular risk. The potential impact of strategies to acutely promote HDL functionality will be reviewed. RECENT FINDINGS Population and animal studies suggest that HDLs have a protective impact on atherosclerotic plaque. However, the failure of recent clinical trials of HDL cholesterol-raising agents has raised concerns that this may not be a viable strategy to reduce cardiovascular risk. Increasing attention has highlighted the importance of the functional quality, as opposed to quantity, of HDL with evidence of impaired HDL function in the setting of acute coronary syndromes (ACSs). The finding that infusing HDL in patients with recent acute ischemic events promotes the rapid regression of coronary atherosclerosis suggests a potentially useful strategy for ACS patients, although this remains to be fully established in large clinical outcome trials. SUMMARY Infusing HDL has favorable effects on coronary atherosclerosis in ACS patients, suggesting a potentially beneficial therapeutic strategy to acutely promote HDL functionality.
Collapse
Affiliation(s)
- MyNgan Duong
- aSouth Australian Health and Medical Research InstitutebDepartment of Medicine, University of Adelaide, Adelaide, South Australia, Australia
| | | | | |
Collapse
|
5
|
Abstract
Cardiovascular disease remains the most pressing healthcare issue for the developed world and is becoming so for developing countries. There are no currently approved therapies that can rapidly reduce the burden of unstable, inflamed plaque in the overall coronary vascular bed. High-density lipoprotein (HDL) has multiple actions that could lead to plaque stabilization, such as rapid removal of large quantities of cholesterol from the vasculature through the process of reverse lipid transport, improvement in endothelial function, protection against oxidative damage, and reduction in inflammation. Short-term infusion of HDL-mimetics in animal models as well as in humans has shown promising effects on the plaque size and morphology. Cerenis Therapeutics has developed CER-001, a negatively charged lipoprotein complex consisting of phospholipid and recombinant human apoA-I that mimics the structure and function of natural HDL. Three clinical trials using CER-001 infusions have demonstrated improvements in the carotid wall thickness of patients with familial hypercholesterolaemia and in patients with hypo-alphalipoproteinaemia, as well as an impact on coronary plaque burden measured by intravascular ultrasonography at the lowest tested dose (3 mg/kg) in post-ACS patients. Here, we reviewed the non-clinical data leading to the demonstration that CER-001 is a full HDL mimetic.
Collapse
|
6
|
Abstract
Low plasma levels of HDL-cholesterol (HDL-C) represent a strong and independent risk factor for cardiovascular disease. HDL particles display a wide spectrum of atheroprotective activities, which include effluxing cellular cholesterol, diminishing cellular death, decreasing vascular constriction, reducing inflammatory response, protecting from pathological oxidation, combating bacterial infection, lessening platelet activation, regulating gene expression by virtue of microRNAs, and improving glucose metabolism. It remains presently indeterminate as to whether some biological activities of HDL are more relevant for the protection of the endothelium from atherogenesis when compared with others. The multitude of such activities raises the question of a proper assay to assess HDL functionality ex vivo. Together with clear understanding of molecular mechanisms underlying atheroprotective properties of HDL, such assay will provide a basis to resolve the ultimate question of the HDL field to allow the development of efficient HDL-targeting therapies.
Collapse
Affiliation(s)
- Anatol Kontush
- National Institute for Health and Medical Research (INSERM), UMR-ICAN 1166, University of Pierre and Marie Curie - Paris 6, Pitié - Salpétrière University Hospital, ICAN, 75651 Paris Cedex 13, France
| |
Collapse
|
7
|
Lane T, Wassef N, Poole S, Mistry Y, Lachmann HJ, Gillmore JD, Hawkins PN, Pepys MB. Infusion of pharmaceutical-grade natural human C-reactive protein is not proinflammatory in healthy adult human volunteers. Circ Res 2013; 114:672-6. [PMID: 24337102 DOI: 10.1161/circresaha.114.302770] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
RATIONALE Baseline circulating concentrations of C-reactive protein (CRP) are significantly associated with cardiovascular disease risk in general populations. This modest association has been inappropriately conflated with causality, and it has been claimed that CRP is proatherogenic. Most of the known causative factors for atherosclerosis stimulate increased CRP production, but comprehensive genetic epidemiology studies provide no support for a pathogenic role of CRP. The reported proinflammatory effects of human CRP preparations on healthy cells in vitro and in healthy animals in vivo have all been produced by poorly characterized CRP preparations, demonstrably caused by impurities, or elicited by CRP made in recombinant Escherichia coli not by humans. None of the in vitro or animal findings have been reproduced with pure natural human CRP. Nevertheless, the strong proinflammatory effects of infusing recombinant bacterial CRP into humans have still been inappropriately ascribed to CRP. OBJECTIVE To investigate the effects of infusion into healthy adult human volunteers of pure natural human CRP. METHODS AND RESULTS Comprehensively characterized, pharmaceutical-grade, endotoxin-free, purified CRP, prepared to GMP standard from pooled normal human donor plasma was infused as an intravenous bolus in 7 healthy adult human volunteers at ≤2 mg/kg to provide circulating CRP concentrations ≤44 mg/L. No recipient showed any significant clinical, hematologic, coagulation, or biochemical changes, or any increase in proinflammatory cytokines or acute phase proteins. CONCLUSIONS The human CRP molecule itself is not proinflammatory in healthy human adults.
Collapse
Affiliation(s)
- Thirusha Lane
- From the Wolfson Drug Discovery Unit, and the National Amyloidosis Centre, Centre for Amyloidosis and Acute Phase Proteins, Division of Medicine, University College London, London, United Kingdom (M.B.P., T.L., H.J.L., J.D.G., P.N.H.); Department of Clinical Biochemistry, Royal Free Hospital, London, United Kingdom (N.W.); and the National Institute for Biological Standards and Control, Potters Bar, Hertfordshire, United Kingdom (S.P., Y.M.)
| | | | | | | | | | | | | | | |
Collapse
|
8
|
Superior in vivo compatibility of hydrophilic polymer coated prosthetic vascular grafts. J Vasc Access 2013; 15:95-101. [PMID: 24170585 DOI: 10.5301/jva.5000166] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/25/2013] [Indexed: 11/20/2022] Open
Abstract
PURPOSE Protein adsorption, cell adhesion and graft patency was compared in hydrophilic versus hydrophobic polymer-coated prosthetic vascular grafts. We hypothesize that in vivo compatibility of hydrophilic polymer-coated prosthetic vascular grafts is superior to in vivo compatibility of hydrophobic grafts. METHODS A pairwise side-to-side common carotid artery interposition graft was placed eight female landrace goats (mean weight 55 kg). Protein adsorption was assessed using Western Blot in two hydrophilic and two hydrophobic grafts harvested after three days. Graft patency was monitored for 28 days in six goats with continuous wave Doppler ultrasonography. Adherence of endothelial cells, leukocytes and platelets was determined with ELISA and compared between the two graft types after 28 days. RESULTS After three days, more ApoA-I, albumin and VEGF and less fibrin adsorbed to hydrophilic grafts. After 28 days, compared to hydrophobic grafts, higher numbers of endothelial cells were present on hydrophilic grafts (P=0.016), and less thrombocytes and leukocytes (P=0.012 and 0.024, respectively). Two out of eight hydrophobic grafts lost patency, while none of the hydrophilic grafts failed (P=0.157). CONCLUSIONS Hydrophilic polymer-coated vascular grafts have superior in vivo compatibility when compared to hydrophobic grafts as characterized by reduced platelet and leukocyte adherence as well as higher endothelialization.
Collapse
|
9
|
van Wijk DF, Boekholdt SM, Wareham NJ, Ahmadi-Abhari S, Kastelein JJP, Stroes ESG, Khaw KT. C-reactive protein, fatal and nonfatal coronary artery disease, stroke, and peripheral artery disease in the prospective EPIC-Norfolk cohort study. Arterioscler Thromb Vasc Biol 2013; 33:2888-94. [PMID: 24072695 DOI: 10.1161/atvbaha.113.301736] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
OBJECTIVE Circulating levels of C-reactive protein (CRP) are associated with an increased risk of coronary artery disease (CAD), stroke, and peripheral artery disease (PAD). Observational and experimental evidence suggest that CRP might differentially predict fatal and nonfatal cardiovascular events. Here, we sought to determine the predictive value of CRP for fatal and nonfatal CAD, stroke, or PAD. APPROACH AND RESULTS CRP levels were measured in 18 450 apparently healthy participants in the European Prospective Investigation into Cancer and Nutrition (EPIC)-Norfolk cohort. Cox proportional hazards models were used to quantify the association between CRP levels and fatal and nonfatal CAD events, strokes, and PAD events. Bootstrapping was applied to test for significant differences between the risk of fatal and nonfatal events. During 208 485 person-years at risk, 2915 CAD events, 361 strokes, and 657 PAD events occurred. CRP was associated with fatal and nonfatal CAD events and nonfatal PAD events. When adding CRP to predictive risk models for fatal and nonfatal events corrected for known cardiovascular risk factors, the net reclassification index was 2.1% for fatal and 1.9% for nonfatal events. Multivariate adjusted hazard ratios for fatal CAD events (hazard ratio, 1.36; 95% confidence interval, 1.27-1.46) differed significantly (mean difference, 13%; 95% confidence interval, 5.1%-21.9%; P<0.001) from the multivariate adjusted hazard ratio for nonfatal CAD events (hazard ratio, 1.21; 95% confidence interval, 1.15-1.26). CONCLUSIONS In the EPIC-Norfolk cohort, CRP was associated with fatal and nonfatal CAD events, as well as nonfatal PAD events. Adding CRP to risk stratification models resulted in a small improvement in classification for both fatal and nonfatal events. Importantly, CRP was significantly more strongly associated with fatal CAD events than with nonfatal CAD events.
Collapse
Affiliation(s)
- Diederik F van Wijk
- From the Department of Vascular Medicine (D.F.v.W., J.J.P.K., E.S.G.S.) and Department of Cardiology (S.M.B.), Academic Medical Center, Amsterdam, The Netherlands; MRC Epidemiology Unit, Addenbrookes Hospital, Cambridge, United Kingdom (N.J.W.); and Department of Public Health and Primary Care, Institute of Public Health, University of Cambridge, Cambridge, United Kingdom (S.A.-A., K.-T.K.)
| | | | | | | | | | | | | |
Collapse
|
10
|
Abstract
The substantial residual risk of cardiovascular events despite the implementation of effective lowering of low-density lipoprotein cholesterol highlights the need to develop additional cardioprotective therapies. Evidence from population and animal studies suggests that high-density lipoproteins (HDLs), the protective lipid particles, may represent a target for therapeutic modification. As a result intensive efforts are in progress to develop new agents that promote HDL activity. Among these different approaches, a range of strategies that target apolipoprotein A-I, the major protein carried on HDL, are being evaluated.
Collapse
|
11
|
Reconstituted high-density lipoprotein shortens cardiac repolarization. J Am Coll Cardiol 2011; 58:40-4. [PMID: 21700087 DOI: 10.1016/j.jacc.2010.11.072] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2010] [Accepted: 11/19/2010] [Indexed: 11/24/2022]
Abstract
OBJECTIVES We hypothesize that increasing high-density lipoprotein cholesterol (HDL-C) shortens cardiac repolarization. BACKGROUND HDL-C is inversely associated with sudden death. The relation between HDL-C and repolarization of the heart is unexplored. METHODS HDL-C was elevated with reconstituted high-density lipoprotein (rHDL). Cardiac repolarization was studied by recording cardiac transmembrane potentials with the patch clamp technique from isolated rabbit cardiomyocytes that were superfused with rHDL. Infusions with rHDL (40 mg/kg body weight) were performed in dyslipidemic patients and healthy volunteers. Electrocardiograms were recorded to assess cardiac repolarization before and 24 h after infusion with rHDL. RESULTS rHDL as well as purified human apolipoprotein AI shortened repolarization of isolated rabbit cardiomyocytes by ∼25% (p < 0.05). rHDL infusion shortened the heart rate-corrected QT interval on surface electrocardiograms in all participants (p < 0.001). CONCLUSIONS rHDL shortens cardiac repolarization. These data provide evidence for a novel mechanism of HDL infusion that may contribute to reduction of sudden cardiac death.
Collapse
|
12
|
Fazio S, Linton MF. High-density lipoprotein therapeutics and cardiovascular prevention. J Clin Lipidol 2010; 4:411-9. [PMID: 21122685 DOI: 10.1016/j.jacl.2010.08.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2010] [Accepted: 08/07/2010] [Indexed: 01/30/2023]
Abstract
The field of cardiovascular prevention has long anticipated the evolution of high-density lipoprotein (HDL) therapy from unproven metabolic tweaking to pillar of risk reduction on par with low-density lipoprotein control. However, the convincing epidemiologic data linking HDL cholesterol (HDL-C) and cardiovascular disease risk in an inverse correlation has not yet translated into clinical trial evidence supporting linearity between HDL-C increases and risk reduction, or identifying obvious goals of therapy. Although HDL-C-increasing lifestyle maneuvers and established HDL drugs such as niacin and fibrates are likely to protect the vasculature, the negative results obtained in trials of a cholesteryl ester transfer protein inhibitor remind us that HDL-C increases are not always beneficial. It is becoming clear that a functional HDL is a more desirable target than simply increasing HDL-C levels. The larger objective of improving HDL functionality (with or without HDL-C level changes) is bound to become the guiding principle for pharmaceutical research in this area. Several new compounds currently being tested bridge the classical aim of increasing HDL-C levels with the novel target of improving HDL function.
Collapse
Affiliation(s)
- Sergio Fazio
- Division of Cardiovascular Medicine, Vanderbilt University Medical Center, Atherosclerosis Research Unit, 383 PRB-2220 Pierce Avenue, Nashville, TN 37232-6300, USA.
| | | |
Collapse
|
13
|
Bisoendial RJ, Stroes ESG, Kastelein JJP, Tak PP. Targeting cardiovascular risk in rheumatoid arthritis: a dual role for statins. Nat Rev Rheumatol 2010; 6:157-64. [PMID: 20142814 DOI: 10.1038/nrrheum.2009.277] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Rheumatoid arthritis (RA) is a prototypical immune-mediated inflammatory disease that is characterized by increased cardiovascular morbidity and mortality, independent of the traditional risk factors for cardiovascular disease. The chronic inflammatory state--a hallmark of RA--is considered to be a driving force for accelerated atherogenesis. Consequently, aggressive control of RA disease activity is thought to be instrumental for cardiovascular risk reduction. Currently, statin-mediated reduction of LDL-cholesterol levels is considered to be the cornerstone of cardiovascular disease prevention. In addition to their lipid-lowering capabilities, statins exert immunomodulatory effects, which could be of dual benefit in the treatment of RA. Guidelines on the reduction of cardiovascular risk in patients with RA are lacking, however, largely owing to the absence of data from randomized controlled trials. This Review focuses on the pathophysiology of cardiovascular events in RA, as well as the need to adjust cardiovascular risk engines to better-accommodate the impact of chronic inflammatory disease over and above the established risk factors to predict cardiovascular risk in patients with RA.
Collapse
Affiliation(s)
- Radjesh J Bisoendial
- Department of Clinical Immunology and Rheumatology, Academic Medical Center, University of Amsterdam, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands.
| | | | | | | |
Collapse
|
14
|
Mikirova NA, Jackson JA, Hunninghake R, Kenyon J, Chan KWH, Swindlehurst CA, Minev B, Patel AN, Murphy MP, Smith L, Alexandrescu DT, Ichim TE, Riordan NH. Circulating endothelial progenitor cells: a new approach to anti-aging medicine? J Transl Med 2009; 7:106. [PMID: 20003528 PMCID: PMC2804590 DOI: 10.1186/1479-5876-7-106] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2009] [Accepted: 12/15/2009] [Indexed: 12/17/2022] Open
Abstract
Endothelial dysfunction is associated with major causes of morbidity and mortality, as well as numerous age-related conditions. The possibility of preserving or even rejuvenating endothelial function offers a potent means of preventing/treating some of the most fearful aspects of aging such as loss of mental, cardiovascular, and sexual function. Endothelial precursor cells (EPC) provide a continual source of replenishment for damaged or senescent blood vessels. In this review we discuss the biological relevance of circulating EPC in a variety of pathologies in order to build the case that these cells act as an endogenous mechanism of regeneration. Factors controlling EPC mobilization, migration, and function, as well as therapeutic interventions based on mobilization of EPC will be reviewed. We conclude by discussing several clinically-relevant approaches to EPC mobilization and provide preliminary data on a food supplement, Stem-Kine, which enhanced EPC mobilization in human subjects.
Collapse
Affiliation(s)
- Nina A Mikirova
- Bio-Communications Research Institute, Wichita, Kansas, USA.
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|