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Torre KW, de Graaf J. Hydrodynamic lubrication in colloidal gels. Soft Matter 2023; 19:7388-7398. [PMID: 37740405 PMCID: PMC10548787 DOI: 10.1039/d3sm00784g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Accepted: 09/15/2023] [Indexed: 09/24/2023]
Abstract
Colloidal gels are elasto-plastic materials composed of an out-of-equilibrium, self-assembled network of micron-sized (solid) particles suspended in a fluid. Recent work has shown that far-field hydrodynamic interactions do not change gel structure, only the rate at which the network forms and ages. However, during gel formation, the interplay between short-ranged attractions leading to gelation and equally short-ranged hydrodynamic lubrication interactions remains poorly understood. Here, we therefore study gelation using a range of hydrodynamic descriptions: from single-body (Brownian Dynamics), to pairwise (Rotne-Prager-Yamakawa), to (non-)lubrication-corrected many-body (Stokesian Dynamics). We confirm the current understanding informed by simulations accurate in the far-field. Yet, we find that accounting for lubrication can strongly impact structure at low colloid volume fraction. Counterintuitively, strongly dissipative lubrication interactions also accelerate the aging of a gel, irrespective of colloid volume fraction. Both elements can be explained by lubrication forces facilitating collective dynamics and therefore phase-separation. Our findings indicate that despite the computational cost, lubricated hydrodynamic modeling with many-body far-field interactions is needed to accurately capture the evolution of the gel structure.
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Affiliation(s)
- K W Torre
- Institute for Theoretical Physics, Center for Extreme Matter and Emergent Phenomena, Utrecht University, Princetonplein 5, 3584 CC Utrecht, The Netherlands.
| | - J de Graaf
- Institute for Theoretical Physics, Center for Extreme Matter and Emergent Phenomena, Utrecht University, Princetonplein 5, 3584 CC Utrecht, The Netherlands.
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2
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Torre KW, de Graaf J. Structuring colloidal gels via micro-bubble oscillations. Soft Matter 2023; 19:2771-2779. [PMID: 36988352 PMCID: PMC10091832 DOI: 10.1039/d2sm01450e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Accepted: 03/09/2023] [Indexed: 06/19/2023]
Abstract
Locally (re)structuring colloidal gels - micron-sized particles forming a connected network with arrested dynamics - can enable precise tuning of the micromechanical and -rheological properties of the system. A recent experimental study [B. Saint-Michel, G. Petekidis, and V. Garbin, Soft Matter, 2022, 18, 2092] showed that local ordering can be rapidly induced by acoustically modulating an embedded microbubble. Here, we perform Brownian dynamics simulations to understand the mechanical effect of an oscillating microbubble on the next-to-bubble structure of the embedding colloidal gel. Our simulations reveal hexagonal-close-packed structures over a range that is comparable to the amplitude of the oscillations. However, we were unable to reproduce the unexpectedly long-ranged modification of the gel structure - dozens of amplitudes - observed in experiment. This suggests including long-ranged effects, such as fluid flow, should be considered in future computational work.
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Affiliation(s)
- K W Torre
- Institute for Theoretical Physics, Center for Extreme Matter and Emergent Phenomena, Utrecht University, Princetonplein 5, 3584 CC Utrecht, The Netherlands.
| | - J de Graaf
- Institute for Theoretical Physics, Center for Extreme Matter and Emergent Phenomena, Utrecht University, Princetonplein 5, 3584 CC Utrecht, The Netherlands.
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3
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Bus CL, van der Gulden R, Bolk M, de Graaf J, van den Hurk M, Scherpbier-de Haan NND, Fluit CRMG, Kuijer-Siebelink W, Looman N. Adaptability and learning Intraprofessional collaboration of residents during the COVID-19 pandemic. BMC Med Educ 2022; 22:782. [PMID: 36371177 PMCID: PMC9652594 DOI: 10.1186/s12909-022-03868-9] [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: 06/10/2022] [Accepted: 11/07/2022] [Indexed: 06/16/2023]
Abstract
CONTEXT The COVID-19 pandemic created a worldwide public health emergency, in which hospitals created new COVID departments and doctors from different disciplines had to work together. In the Netherlands, a large proportion of doctors in these departments were residents. With knowledge of the disease developing only gradually, the influx of COVID-19 patients called for adaptability, innovative work behavior, and intraprofessional collaboration (intraPC) between residents and between residents and medical specialists. RESEARCH GOAL This study investigates how the delivery of COVID-19 care in hospital settings altered the way residents develop their sense of adaptability and intraPC during their training. METHODS Sixteen semi-structured interviews were conducted with residents and medical specialists from various disciplines who worked at a COVID department or Intensive Care Unit (ICU) during the COVID pandemic in the Netherlands, focusing on adaptability and intraPC learning. Transcripts were analyzed using (thematic) template analysis. RESULTS Four themes that influenced learning during COVID care were identified: collective uncertainty, social cohesion and a sense of safety, the need for adaptive performance and intraPC learning. During the first wave, collective uncertainty about the unknown disease and the continuation of the crisis urged residents to adapt in order to take care of patients with a disease that was as yet unknown. The combination of collective uncertainty, social cohesion and a sense of safety, and the presence of different disciplines in one department promoted residents' intraPC learning. However, intraPC learning was not always the matter of course due to the scope of the crisis and the huge numbers of new patients. CONCLUSION Collective uncertainty affected the residents' adaptability. The combination of collective uncertainty, social cohesion, and the presence of different disciplines in one department promoted the residents' intraPC learning. An important facilitating factor for both adaptability and intraPC learning is a high level of social cohesion and safety. The physical and psychological proximity of supervisors is an important factor contributing to a safe learning environment. This study provides implications for practice for learning during postgraduate training in non-crisis settings.
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Affiliation(s)
- C L Bus
- Radboudumc Health Academy, Department of Research on Learning and Education, Radboud University Medical Centre, Nijmegen, the Netherlands.
- School of Education, Department of Research on responsive vocational and professional education, HAN University of Applied Sciences, Nijmegen, the Netherlands.
| | - R van der Gulden
- Radboud Institute for Health Sciences, Department of Primary and Community Care, Radboud University Medical Center, Nijmegen, the Netherlands
| | - M Bolk
- Dutch Association of Medical Specialists, Utrecht, the Netherlands
| | - J de Graaf
- Radboudumc Health Academy, Division of Post Graduate Medical Education, Radboud University Medical Centre, Nijmegen, the Netherlands
| | - M van den Hurk
- Department of Educational Sciences, Faculty of Social Sciences, Radboud University, Nijmegen, the Netherlands
| | - N N D Scherpbier-de Haan
- Department of General Practice and Elderly Care Medicine, University Medical Centre Groningen, Groningen, the Netherlands
| | - C R M G Fluit
- Radboudumc Health Academy, Department of Research on Learning and Education, Radboud University Medical Centre, Nijmegen, the Netherlands
| | - W Kuijer-Siebelink
- Radboudumc Health Academy, Department of Research on Learning and Education, Radboud University Medical Centre, Nijmegen, the Netherlands
- School of Education, Department of Research on responsive vocational and professional education, HAN University of Applied Sciences, Nijmegen, the Netherlands
| | - N Looman
- Radboud Institute for Health Sciences, Department of Primary and Community Care, Radboud University Medical Center, Nijmegen, the Netherlands
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Narinder N, Bos MF, Abaurrea-Velasco C, de Graaf J, Bechinger C. Understanding enhanced rotational dynamics of active probes in rod suspensions. Soft Matter 2022; 18:6246-6253. [PMID: 35946318 PMCID: PMC9400583 DOI: 10.1039/d2sm00583b] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Accepted: 07/20/2022] [Indexed: 06/01/2023]
Abstract
Active Brownian particles (APs) have recently been shown to exhibit enhanced rotational diffusion (ERD) in complex fluids. Here, we experimentally observe ERD and numerically corroborate its microscopic origin for a quasi-two-dimensional suspension of colloidal rods. At high density, the rods form small rafts, wherein they perform small-amplitude, high-frequency longitudinal displacements. Activity couples AP-rod contacts to reorientation, with the variance therein leading to ERD. This is captured by a local, rather than a global relaxation time, as used in previous phenomenological modeling. Our result should prove relevant to the microrheological characterization of complex fluids and furthering our understanding of the dynamics of microorganisms in such media.
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Affiliation(s)
- N Narinder
- Fachbereich Physik, Universität Konstanz, 78464, Konstanz, Germany.
| | - M F Bos
- Institute for Theoretical Physics, Center for Extreme Matter and Emergent Phenomena, Utrecht University, Princetonplein 5, Utrecht, 3584 CC, The Netherlands
| | - C Abaurrea-Velasco
- Institute for Theoretical Physics, Center for Extreme Matter and Emergent Phenomena, Utrecht University, Princetonplein 5, Utrecht, 3584 CC, The Netherlands
| | - J de Graaf
- Institute for Theoretical Physics, Center for Extreme Matter and Emergent Phenomena, Utrecht University, Princetonplein 5, Utrecht, 3584 CC, The Netherlands
| | - C Bechinger
- Fachbereich Physik, Universität Konstanz, 78464, Konstanz, Germany.
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5
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Rietbergen T, Marang-van de Mheen PJ, de Graaf J, Diercks RL, Janssen RPA, van der Linden-van der Zwaag HMJ, van den Akker-van Marle ME, Steyerberg EW, Nelissen RGHH, van Bodegom-Vos L, Hofstee DJ, van Geenen RCI, Koenraadt KLM, Onderwater JPAH, Kleinlugtenbelt YV, Gosens T, Klos TVS, Rijk PC, Dijkstra B, Zeegers AVCM, Hoogeslag RAG, Veld MHAHI, Polak AA, Pereira NRP, Vervest TMJS, van der Veen HC, Lopuhaä N. A tailored intervention does not reduce low value MRI's and arthroscopies in degenerative knee disease when the secular time trend is taken into account: a difference-in-difference analysis. Knee Surg Sports Traumatol Arthrosc 2022; 30:4134-4143. [PMID: 35391552 PMCID: PMC9668785 DOI: 10.1007/s00167-022-06949-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Accepted: 03/15/2022] [Indexed: 10/18/2022]
Abstract
PURPOSE To evaluate the effectiveness of a tailored intervention to reduce low value MRIs and arthroscopies among patients ≥ 50 years with degenerative knee disease in 13 Dutch orthopaedic centers (intervention group) compared with all other Dutch orthopaedic centers (control group). METHODS All patients with degenerative knee disease ≥ 50 years admitted to Dutch orthopaedic centers from January 2016 to December 2018 were included. The tailored intervention included participation of clinical champions, education on the Dutch Choosing Wisely recommendation for MRI's and arthroscopies in degenerative knee disease, training of orthopaedic surgeons to manage patient expectations, performance feedback, and provision of a patient brochure. A difference-in-difference analysis was used to compare the time trend before (admitted January 2016-June 2017) and after introduction of the intervention (July 2017-December 2018) between intervention and control hospitals. Primary outcome was the monthly percentage of patients receiving a MRI or knee arthroscopy, weighted by type of hospital. RESULTS 136,446 patients were included, of whom 32,163 were treated in the intervention hospitals. The weighted percentage of patients receiving a MRI on average declined by 0.15% per month (β = - 0.15, P < 0.001) and by 0.19% per month for arthroscopy (β = - 0.19, P < 0.001). However, these changes over time did not differ between intervention and control hospitals, neither for MRI (β = - 0.74, P = 0.228) nor arthroscopy (β = 0.13, P = 0.688). CONCLUSIONS The extent to which patients ≥ 50 years with degenerative knee disease received a MRI or arthroscopy declined significantly over time, but could not be attributed to the tailored intervention. This secular downward time trend may reflect anoverall focus of reducing low value care in The Netherlands. LEVEL OF EVIDENCE III.
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Affiliation(s)
- T. Rietbergen
- grid.10419.3d0000000089452978Department of Biomedical Data Sciences, Section Medical Decision Making, Leiden University Medical Center, Postzone J10-s, P.O. Box 9600, 2300 RC Leiden, The Netherlands
| | - P. J. Marang-van de Mheen
- grid.10419.3d0000000089452978Department of Biomedical Data Sciences, Section Medical Decision Making, Leiden University Medical Center, Postzone J10-s, P.O. Box 9600, 2300 RC Leiden, The Netherlands
| | - J. de Graaf
- grid.10419.3d0000000089452978Department of Biomedical Data Sciences, Section Medical Decision Making, Leiden University Medical Center, Postzone J10-s, P.O. Box 9600, 2300 RC Leiden, The Netherlands
| | - R. L. Diercks
- grid.4494.d0000 0000 9558 4598Department of Orthopaedics, University Medical Center Groningen, Groningen, The Netherlands
| | - R. P. A. Janssen
- grid.414711.60000 0004 0477 4812Department of Orthopaedic Surgery and Trauma, Maxima Medical Center, Eindhoven, The Netherlands ,grid.6852.90000 0004 0398 8763Orthopaedic Biomechanics, Department Of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands ,grid.448801.10000 0001 0669 4689Chair Value-Based Health Care, Fontys University of Applied Sciences, Eindhoven, The Netherlands
| | | | - M. E. van den Akker-van Marle
- grid.10419.3d0000000089452978Department of Biomedical Data Sciences, Section Medical Decision Making, Leiden University Medical Center, Postzone J10-s, P.O. Box 9600, 2300 RC Leiden, The Netherlands
| | - E. W. Steyerberg
- grid.10419.3d0000000089452978Department of Biomedical Data Sciences, Section Medical Decision Making, Leiden University Medical Center, Postzone J10-s, P.O. Box 9600, 2300 RC Leiden, The Netherlands
| | - R. G. H. H. Nelissen
- grid.10419.3d0000000089452978Department of Orthopaedics, Leiden University Medical Center, Leiden, The Netherlands
| | - L. van Bodegom-Vos
- grid.10419.3d0000000089452978Department of Biomedical Data Sciences, Section Medical Decision Making, Leiden University Medical Center, Postzone J10-s, P.O. Box 9600, 2300 RC Leiden, The Netherlands
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6
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van der Voort S, de Graaf J, de Blok K, Sekkat M. Persevering syndrome of inappropriate antidiuretic hormone secretion after traumatic brain injury. Neth J Med 2020; 78:290-293. [PMID: 33093255] [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: 06/11/2023]
Abstract
The syndrome of inappropriate antidiuretic hormone secretion (SIADH) is a known cause of hyponatremia, caused by excessive ADH secretion which, in turn, leads to water retention. SIADH has been associated with multiple etiologies, one of which is traumatic brain injury (TBI). Most cases of SIADH after TBI describe a course in which hyponatraemia develops several days to weeks after the trauma and then resolves within a few weeks. We demonstrate a case of SIADH after TBI, which persisted several years after initial presentation, but eventually did resolve spontaneously after five years.
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7
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Van Den Munckhof I, Horst RT, Schraa K, Stienstra R, de Graaf J, Riksen N, Joosten L, Netea M, Rutten J. Il-18 Binding Protein: A Novel Biomarker In Obesity-Related Atherosclerosis That Modulates Lipoprotein Metabolism. Atherosclerosis 2019. [DOI: 10.1016/j.atherosclerosis.2019.06.217] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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8
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van den Munckhof ICL, Kurilshikov A, Ter Horst R, Riksen NP, Joosten LAB, Zhernakova A, Fu J, Keating ST, Netea MG, de Graaf J, Rutten JHW. Role of gut microbiota in chronic low-grade inflammation as potential driver for atherosclerotic cardiovascular disease: a systematic review of human studies. Obes Rev 2018; 19:1719-1734. [PMID: 30144260 DOI: 10.1111/obr.12750] [Citation(s) in RCA: 152] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Revised: 06/25/2018] [Accepted: 06/26/2018] [Indexed: 12/11/2022]
Abstract
A hallmark of obesity is chronic low-grade inflammation, which plays a major role in the process of atherosclerotic cardiovascular disease (ACVD). Gut microbiota is one of the factors influencing systemic immune responses, and profound changes have been found in its composition and metabolic function in individuals with obesity. This systematic review assesses the association between the gut microbiota and markers of low-grade inflammation in humans. We identified 14 studies which were mostly observational and relatively small (n = 10 to 471). The way in which the microbiome is analysed differed extensively between these studies. Lower gut microbial diversity was associated with higher white blood cell counts and high sensitivity C-reactive protein (hsCRP) levels. The abundance of Bifidobacterium, Faecalibacterium, Ruminococcus and Prevotella were inversely related to different markers of low-grade inflammation such as hsCRP and interleukin (IL)-6. In addition, this review speculates on possible mechanisms through which the gut microbiota can affect low-grade inflammation and thereby ACVD. We discuss the associations between the microbiome and the inflammasome, the innate immune system, bile acids, gut permeability, the endocannabinoid system and TMAO. These data reinforce the importance of human research into the gut microbiota as potential diagnostic and therapeutic strategy to prevent ACVD.
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Affiliation(s)
- I C L van den Munckhof
- Department of Internal Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
| | - A Kurilshikov
- Department of Genetics, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - R Ter Horst
- Department of Internal Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
| | - N P Riksen
- Department of Internal Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
| | - L A B Joosten
- Department of Internal Medicine, Radboud University Medical Center, Nijmegen, The Netherlands.,Department of Medical Genetics, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - A Zhernakova
- Department of Genetics, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands.,Department of Pediatrics, University of Groningen and University Medical Center Groningen, Groningen, The Netherlands
| | - J Fu
- Department of Genetics, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands.,Department of Pediatrics, University of Groningen and University Medical Center Groningen, Groningen, The Netherlands
| | - S T Keating
- Department of Internal Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
| | - M G Netea
- Department of Internal Medicine, Radboud University Medical Center, Nijmegen, The Netherlands.,Department for Genomics and Immunoregulation, Life and Medical Sciences Institute (LIMES), University of Bonn, Bonn, Germany
| | - J de Graaf
- Department of Internal Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
| | - J H W Rutten
- Department of Internal Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
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9
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Janssen M, Sagasser G, Laro E, de Graaf J, Scherpbier-de Haan N. Learning intraprofessional collaboration by participating in a consultation programme: What and how did primary and secondary care trainees learn? Education for Primary Care 2017. [DOI: 10.1080/14739879.2017.1345651] [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: 10/19/2022]
Affiliation(s)
- M. Janssen
- Department of Internal medicine, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - G. Sagasser
- GP-training Organisation, Utrecht, The Netherlands
| | - E. Laro
- Department of Primary and Community Care, Radboud University Medical Centre, The Netherlands
| | - J. de Graaf
- Department of Internal medicine, Radboud University Medical Centre, Nijmegen, The Netherlands
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10
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Galesloot TE, Vermeulen SH, Swinkels DW, de Vegt F, Franke B, den Heijer M, de Graaf J, Verbeek ALM, Kiemeney LALM. Cohort Profile: The Nijmegen Biomedical Study (NBS). Int J Epidemiol 2017; 46:1099-1100j. [PMID: 28082374 PMCID: PMC5837647 DOI: 10.1093/ije/dyw268] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/25/2016] [Indexed: 01/23/2023] Open
Affiliation(s)
- Tessel E Galesloot
- Radboud university medical center, Radboud Institute for Health Sciences, Nijmegen, The Netherlands
| | - Sita H Vermeulen
- Radboud university medical center, Radboud Institute for Health Sciences, Nijmegen, The Netherlands
| | - Dorine W Swinkels
- Radboud university medical center, Radboud Institute for Molecular Life Sciences, Nijmegen, The Netherlands
| | - F de Vegt
- Radboud university medical center, Radboud Institute for Health Sciences, Nijmegen, The Netherlands
| | - B Franke
- Radboud university medical center, Donders Institute for Brain, Cognition and Behaviour, Departments of Human Genetics and Psychiatry, Nijmegen, The Netherlands
| | - M den Heijer
- Department of Internal Medicine, VU Medical Centre, Amsterdam, The Netherlands
| | - J de Graaf
- Radboud university medical center, Radboud Institute for Health Sciences, Nijmegen, The Netherlands
| | - André LM Verbeek
- Radboud university medical center, Radboud Institute for Health Sciences, Nijmegen, The Netherlands
| | - Lambertus ALM Kiemeney
- Radboud university medical center, Radboud Institute for Health Sciences, Nijmegen, The Netherlands
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11
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Gaudet D, Saheb S, Bruckert E, de Graaf J, Langslet G, Tardif J, Bergheanu S, Steinberg A, Choi Y, Martin R, McWherter C, Kastelein J, Boudes P. A pilot study of MBX-8025 in the treatment of homozygous familial hypercholesterolemia (HoFH). Atherosclerosis 2016. [DOI: 10.1016/j.atherosclerosis.2016.07.068] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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12
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Bekkering S, van den Munckhof I, Nielen T, Rutten J, de Graaf J, Joosten L, Netea M, Gomes M, Riksen N. Innate immune cell activation in symptomatic and asymptomatic atherosclerosis in humans in vivo. Atherosclerosis 2016. [DOI: 10.1016/j.atherosclerosis.2016.07.077] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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13
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Heinhuis B, Damen M, Holewijn S, de Graaf J, Fransen J, Popa C, Joosten L. SAT0011 An IL-32 Promoter SNP Associated with Lower HDL and Anti-CCP Promoting Atherosclerosis in RA. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.5183] [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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14
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Koopal C, Retterstøl K, Sjouke B, Hovingh G, Ros E, de Graaf J, Dullaart R, Bertolini S, Visseren F. Vascular risk factors, vascular disease, lipids and lipid targets in patients with familial dysbetalipoproteinemia: A European cross-sectional study. Atherosclerosis 2015; 240:90-7. [DOI: 10.1016/j.atherosclerosis.2015.02.046] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2014] [Revised: 01/28/2015] [Accepted: 02/23/2015] [Indexed: 11/24/2022]
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15
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de Graaf J, Jarrassé N, Nicol C, Touillet A, Paysant J. Neuromuscular reorganization after arm amputation revealed by stump EMG evoked by different phantom movements. Ann Phys Rehabil Med 2014. [DOI: 10.1016/j.rehab.2014.03.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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16
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Brouwers MCGJ, Konrad RJ, van Himbergen TM, Isaacs A, Otokozawa S, Troutt JS, Schaefer EJ, van Greevenbroek MMJ, Stalenhoef AFH, de Graaf J. Plasma proprotein convertase subtilisin kexin type 9 levels are related to markers of cholesterol synthesis in familial combined hyperlipidemia. Nutr Metab Cardiovasc Dis 2013; 23:1115-1121. [PMID: 23333725 DOI: 10.1016/j.numecd.2012.11.008] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/22/2012] [Revised: 10/13/2012] [Accepted: 11/24/2012] [Indexed: 02/05/2023]
Abstract
BACKGROUND AND AIMS Two recent independent studies showed that patients with familial combined hyperlipidemia (FCHL) have elevated plasma levels of proprotein convertase subtilisin kexin type 9 (PCSK9) and markers of cholesterol synthesis. Both PCSK9 expression and cholesterol synthesis are downstream effects of hepatic activation of sterol regulatory element binding protein 2 (SREBP2). The present study was conducted to study the relationship between plasma PCSK9 and markers of cholesterol synthesis in FCHL. METHODS AND RESULTS Markers of cholesterol synthesis (squalene, desmosterol, lathosterol), cholesterol absorption (campesterol, sitosterol, cholestanol) and PCSK9 were measured in plasma of FCHL patients (n = 103) and their normolipidemic relatives (NLR; n = 240). Plasma PCSK9, lathosterol and desmosterol levels were higher in FCHL patients than their NLR (p < 0.001, age and sex adjusted). Heritability calculations demonstrated that 35% of the variance in PCSK9 levels could be explained by additive genetic effects (p < 0.001). Significant age- and sex-adjusted correlations were observed for the relationship between PCSK9 and lathosterol, both unadjusted and adjusted for cholesterol, in the overall FCHL population (both p < 0.001). Multivariate regression analyses, with PCSK9 as the dependent variable, showed that the regression coefficient for FCHL status decreased by 25% (from 0.8 to 0.6) when lathosterol was included. Nevertheless, FCHL status remained an independent contributor to plasma PCSK9 (p < 0.001). CONCLUSIONS The present study confirms the previously reported high and heritable PCSK9 levels in FCHL patients. Furthermore, we now show that high PCSK9 levels are, in part, explained by plasma lathosterol, suggesting that SREBP2 activation partly accounts for elevated PCSK9 levels in FCHL.
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Affiliation(s)
- M C G J Brouwers
- Department of Internal Medicine, divisions of General Internal Medicine and Endocrinology, Cardiovascular Research Institute Maastricht, Maastricht University Medical Centre, PO Box 5800, 6202 AZ Maastricht, The Netherlands.
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den Ruijter HM, Peters SAE, Groenewegen KA, Anderson TJ, Britton AR, Dekker JM, Engström G, Eijkemans MJ, Evans GW, de Graaf J, Grobbee DE, Hedblad B, Hofman A, Holewijn S, Ikeda A, Kavousi M, Kitagawa K, Kitamura A, Koffijberg H, Ikram MA, Lonn EM, Lorenz MW, Mathiesen EB, Nijpels G, Okazaki S, O'Leary DH, Polak JF, Price JF, Robertson C, Rembold CM, Rosvall M, Rundek T, Salonen JT, Sitzer M, Stehouwer CDA, Witteman JC, Moons KG, Bots ML. Common carotid intima-media thickness does not add to Framingham risk score in individuals with diabetes mellitus: the USE-IMT initiative. Diabetologia 2013; 56:1494-502. [PMID: 23568273 PMCID: PMC4523149 DOI: 10.1007/s00125-013-2898-9] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [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] [Received: 12/18/2012] [Accepted: 03/08/2013] [Indexed: 12/30/2022]
Abstract
AIMS/HYPOTHESIS The aim of this work was to investigate whether measurement of the mean common carotid intima-media thickness (CIMT) improves cardiovascular risk prediction in individuals with diabetes. METHODS We performed a subanalysis among 4,220 individuals with diabetes in a large ongoing individual participant data meta-analysis involving 56,194 subjects from 17 population-based cohorts worldwide. We first refitted the risk factors of the Framingham heart risk score on the individuals without previous cardiovascular disease (baseline model) and then expanded this model with the mean common CIMT (CIMT model). The absolute 10 year risk for developing a myocardial infarction or stroke was estimated from both models. In individuals with diabetes we compared discrimination and calibration of the two models. Reclassification of individuals with diabetes was based on allocation to another cardiovascular risk category when mean common CIMT was added. RESULTS During a median follow-up of 8.7 years, 684 first-time cardiovascular events occurred among the population with diabetes. The C statistic was 0.67 for the Framingham model and 0.68 for the CIMT model. The absolute 10 year risk for developing a myocardial infarction or stroke was 16% in both models. There was no net reclassification improvement with the addition of mean common CIMT (1.7%; 95% CI -1.8, 3.8). There were no differences in the results between men and women. CONCLUSIONS/INTERPRETATION There is no improvement in risk prediction in individuals with diabetes when measurement of the mean common CIMT is added to the Framingham risk score. Therefore, this measurement is not recommended for improving individual cardiovascular risk stratification in individuals with diabetes.
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Affiliation(s)
- H M den Ruijter
- Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX, Utrecht, the Netherlands
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Jaspers G, Booij A, de Graaf J, de Lange J. Long-term results of maxillomandibular advancement surgery in patients with obstructive sleep apnoea syndrome. Br J Oral Maxillofac Surg 2013; 51:e37-9. [DOI: 10.1016/j.bjoms.2012.03.013] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2012] [Accepted: 03/06/2012] [Indexed: 10/28/2022]
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Marijnissen R, Smits J, Schoevers R, van den Brink R, Holewijn S, Franke B, de Graaf J, Oude Voshaar R. 1034 – The metabolic syndrome and late-life depression. Eur Psychiatry 2013. [DOI: 10.1016/s0924-9338(13)76160-1] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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Azimi A, Kuznecovs S, Kuznecovs J, Blazejczyk A, Switalska M, Chlopicki S, Marcinek A, Gebicki J, Wietrzyk J, Egyhazi S, Azimi A, Ghasghgaei S, Frostvik Stolt M, Hertzman Johansson C, Hansson J, Delage JD, Li H, Lu H, Cazin LH, Vannier JP, Drouet L, Dupuy E, Soria J, Varin R, Soria C, Castle J, Kreiter S, Diekmann J, Lower M, van der Roemer N, de Graaf J, Selmi S, Diken M, Boegel S, Paret C, Koslowski M, Kuhn AN, Britten CM, Huber C, Tureci O, Sahin U, Procopio G, Verzoni E, Testa I, de Braud F, Misale S, Yaeger R, Hobor S, Scala E, Janakiraman M, Liska D, Valtorta E, Schiavo R, Buscarino M, Siravergna G, Bencardino K, Cercek A, Chen C, Veronese S, Zanon C, Sartore-Bianchi A, Gambacorta M, Gallicchio M, Vakiani E, Boscaro V, Medico E, Weiser M, Siena S, di Nicolantonio F, Solit D, Bardelli A, Burbridge MF, Dovat SP, Song C, Payne KJ, Yang L, Cree A, Glaysher M, Bolton L, Johnson P, Atkey N, Torrance C, Bogush TA, Dudko EA, Shaturova AS, Tikhomirov MV, Bogush EA, Polotsky BE, Tjulandin SA, Davydov MI, Hertzman Johansson C, Azimi A, Pernemalm M, Pawitan Y, Frostvik Stolt M, Lazar V, Lundeberg J, Lehtio J, Egyhazi S, Hansson J, Rasul A, Ma T, Dyshlovoy SA, Naeth I, Venz S, Fedorov SN, Shubina LK, Stonik VA, Balabanov S, Honecker F, Kongpracha P, Tohtong R, Demidkina V, Kudryavtsev VA, Kabakov AE, Golan T, Atias D, Barshack I, Avivi C, Goldstein RS, Berger R, Ben-Arieh S, Urban D, Maimon N, Leibowitz-Amit R, Keizman D, Biran H, Mishaeli M, Onn A, Gottfried M, Saraswati S, Agrawal SS, Raval P, Patel M, Ganure L, Hanen JH, Sonia BHK, Aya M, Zohra H, Touhami M, Cheng X, Shi TY, Yang L, Yang G, Tu XY, Wu XH, Wei QY, Benboubker H, Zheng BQ, Shi YQ, He XH, Liang LH, Saied GM. Therapeutics. Ann Oncol 2012. [DOI: 10.1093/annonc/mds162] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Boullart A, de Graaf J, Stalenhoef A. Serum triglycerides and risk of cardiovascular disease. Biochim Biophys Acta Mol Cell Biol Lipids 2012; 1821:867-75. [DOI: 10.1016/j.bbalip.2011.10.002] [Citation(s) in RCA: 105] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2011] [Revised: 09/15/2011] [Accepted: 10/03/2011] [Indexed: 12/15/2022]
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Bus BAA, Marijnissen RM, Holewijn S, Franke B, Purandare N, de Graaf J, den Heijer M, Buitelaar JK, Voshaar RCO. Depressive symptom clusters are differentially associated with atherosclerotic disease. Psychol Med 2011; 41:1419-1428. [PMID: 21144110 DOI: 10.1017/s0033291710002151] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND Depression increases the risk of subsequent vascular events in both cardiac and non-cardiac patients. Atherosclerosis, the underlying process leading to vascular events, has been associated with depression. This association, however, may be confounded by the somatic-affective symptoms being a consequence of cardiovascular disease. While taking into account the differentiation between somatic-affective and cognitive-affective symptoms of depression, we examined the association between depression and atherosclerosis in a community-based sample. METHOD In 1261 participants of the Nijmegen Biomedical Study (NBS), aged 50-70 years and free of stroke and dementia, we measured the intima-media thickness (IMT) of the carotid artery as a measure of atherosclerosis and we assessed depressive symptoms using the Beck Depression Inventory (BDI). Principal components analysis (PCA) of the BDI items yielded two factors, representing a cognitive-affective and a somatic-affective symptom cluster. While correcting for confounders, we used separate multiple regression analyses to test the BDI sum score and both depression symptom clusters. RESULTS We found a significant correlation between the BDI sum score and the IMT. Cognitive-affective, but not somatic-affective, symptoms were also associated with the IMT. When we stratified for coronary artery disease (CAD), the somatic-affective symptom cluster correlated significantly with depression in both patients with and patients without CAD. CONCLUSIONS The association between depressive symptoms and atherosclerosis is explained by the somatic-affective symptom cluster of depression. Subclinical vascular disease thus may inflate depressive symptom scores and may explain why treatment of depression in cardiac patients hardly affects vascular outcome.
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Affiliation(s)
- B A A Bus
- Department of Psychiatry, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands.
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Holewijn S, den Heijer M, Stalenhoef AFH, de Graaf J. Non-invasive measurements of atherosclerosis (NIMA): current evidence and future perspectives. Neth J Med 2010; 68:388-399. [PMID: 21209464] [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: 05/30/2023]
Abstract
In clinical practice, cardiovascular (CV) risk stratification is based on the assessment of individual risk factors. Still many cardiovascular deaths occur in individuals who were not at high risk according to the current CV risk stratification models as the Systematic COronary Risk Evaluation chart (SCORE) and Framingham Risk Score. By measuring morphological and÷or functional abnormalities in the arterial wall directly, the impact of all CV risk factors together can be determined. In this review, the current status for the use of a panel of non-invasive measurements of atherosclerosis (NIMA) in CV risk prediction in clinical practice is discussed. Some of these NIMA showed predictive value for CV disease, such as intima-media thickness, pulse wave velocity, and ankle-brachial index, both in patients and in healthy and community-based populations. Recommendations have been made to include these NIMA in CV risk stratification in secondary prevention. However, the additional value of NIMA in CV risk stratification in primary prevention settings remains to be determined. Furthermore, the main determinants of NIMA are still unclear. Also the use of different combinations of NIMA should be evaluated, since different NIMA likely reflect different stages and aspects of the atherosclerotic process that leads to CV events. Future prospective studies should focus on repeated measures of NIMA to reveal the main determinants of the different NIMA and evaluate the predictive value of baseline versus repeated measurements.
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Affiliation(s)
- S Holewijn
- Department of General Internal Medicine, Division of Vascular Meicine, Radboud University Nijmegen Medical Centre, Nijmegen, the Netherlands.
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Holewijn S, den Heijer M, Swinkels DW, Stalenhoef AFH, de Graaf J. Apolipoprotein B, non-HDL cholesterol and LDL cholesterol for identifying individuals at increased cardiovascular risk. J Intern Med 2010; 268:567-77. [PMID: 21091808 DOI: 10.1111/j.1365-2796.2010.02277.x] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
BACKGROUND To compare apolipoprotein B (apoB), non-high-density lipoprotein-cholesterol (non-HDL-c) and low-density lipoprotein-cholesterol (LDL-c) for identifying individuals with a deteriorated cardiovascular (CV) risk profile, including a panel of subclinical atherosclerosis measurements and prevalent cardiovascular disease (CVD) in a Dutch population-based cohort. METHODS Clinical and biochemical measurements and a panel of noninvasive parameters of subclinical atherosclerosis were determined in 1517 individuals, aged 50-70 years. RESULTS Both men and women with increasing levels of apoB and non-HDL-c were more obese, had higher blood pressure and fasting glucose levels, and a more atherogenic lipid profile. Furthermore, compared to the reference group (composed of those with apoB, non-HDL-c and LDL-c levels in the bottom quartiles), participants with high apoB and high non-HDL-c levels had a lower ankle-brachial index at rest (-3.5% and -3.1%, respectively) and after exercise (-6.3% and -4.7%, respectively), a thicker near wall (+4.8% and +4.2%, respectively), far wall (both +6.2%), and mean intima-media thickness (+5.7% and +5.3%, respectively) and more plaques (+54.2% and +54.3%, respectively). In addition, they also showed increased stiffness parameters (e.g. pulse wave velocity both +3.6%). Less clear differences in CV risk profile and subclinical atherosclerosis parameters were observed when participants were stratified by LDL-c level. Furthermore, apoB but not LDL-c detected prevalent CVD, and non-HDL-c only detected prevalent CVD in men. The discriminatory power for prevalent CVD expressed as area under the receiver operating characteristic curve was 0.60 (P < 0.001) for apoB, 0.57 (P = 0.001) for non-HDL-c and 0.54 (P = 0.108) for LDL-c. CONCLUSION Our data support the use of first apoB and secondly non-HDL-c above LDL-c for identifying individuals from the general population with a compromised CV phenotype.
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Affiliation(s)
- S Holewijn
- Division of Vascular Medicine, Department of General Internal Medicine, Radboud University, Nijmegen Medical Centre, Nijmegen, The Netherlands.
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Holewijn S, den Heijer M, van Tits LJ, Swinkels DW, Stalenhoef AFH, de Graaf J. Impact of waist circumference versus adiponectin level on subclinical atherosclerosis: a cross-sectional analysis in a sample from the general population. J Intern Med 2010; 267:588-98. [PMID: 20210840 DOI: 10.1111/j.1365-2796.2009.02192.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
OBJECTIVE Waist circumference is a clinical marker of obesity and an established risk factor for cardiovascular (CV) disease. Adiponectin, an adipocyte-derived hormone and new biomarker of obesity, was recently proposed as the missing link between obesity and increased cardiovascular risk. We evaluated waist and adiponectin in a middle-aged population-based cohort to compare the impact of both obesity-markers on subclinical atherosclerosis, in relation to other CV risk factors. DESIGN, SETTING & SUBJECTS: Seven noninvasive measurements of atherosclerosis (NIMA), as surrogate markers of (subclinical) atherosclerosis, were determined in 1517 participants of the Nijmegen Biomedical Study, aged 50-70 years, who were drawn from the Dutch community. RESULTS Both men and women with a high waist (M >104 cm; F >95 cm) showed increased pulse wave velocity (PWV) (M: +9.4%; F: +8.3%) and thicker intima-media thickness (IMT) (M: +7.3%; F: +4.3%) and women also showed increased plaque thickness (+16.6%). After adjustment for other CV risk factors both men and women showed increased IMT (M: +4.8%; F: +2.8%) and men also showed increased PWV (+9.6%). Both men and women with a low adiponectin level (M <2.2 mg L(-1); F <3.5 mg L(-1)) showed a decreased ankle-brachial index after exercise (M: -9.5%; F: -3.9%) and increased IMT (M: +3.7%; F: +3.6%) and women also showed increased PWV (+6.8%), but after adjustment for other CV risk factors low adiponectin level was no longer associated with deteriorated outcomes of NIMA. CONCLUSIONS Waist circumference showed independent associations with noninvasive measurements of subclinical atherosclerosis, whereas the association of adiponectin level with subclinical atherosclerosis was not independent of other CV risk factors. Prospective studies are needed to elucidate, if the atherogenic effect of a low adiponectin level is mediated by other CV risk factors and not by low adiponectin level intrinsically.
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Affiliation(s)
- S Holewijn
- Department of General Internal Medicine, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands.
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Holewijn S, Sniderman A, den Heijer M, Swinkels D, Stalenhoef A, de Graaf J. P303 THE DIAGNOSTIC ALGORITHM FOR apoB DYSLIPOPROTEINEMIAS APPLIED TO THE DUTCH POPULATION. ATHEROSCLEROSIS SUPP 2010. [DOI: 10.1016/s1567-5688(10)70370-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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de Graaf J. Host status of avocado ('Hass') to Ceratitis capitata, Ceratitis rosa, and Ceratitis cosyra (Diptera: Tephritidae) in South Africa. J Econ Entomol 2009; 102:1448-1459. [PMID: 19736756 DOI: 10.1603/029.102.0408] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Ceratitis capitata (Wiedemann), Ceratitis rosa Karsch, and Ceratitis cosyra (Walker) (Diptera: Tephritidae) are pests potentially associated with avocado (Persea americana Mill.) in South Africa. The aim of the study was to determine the host status of 'Hass' avocado to these tephritid pests over 4 yr. Unpunctured harvested avocado was exposed to fruit flies in the laboratory under no-choice conditions for 24 h. In field studies, each species was exposed for 48 h under no-choice conditions to avocado attached to the tree. Fruit was harvested immediately, 4, 8 and 18 d after exposure. In all the experiments, the fruit was incubated at 25 degrees C for 49 d after harvest. Hass avocado fruit was sourced from pack-houses throughout the avocado production areas and inspected for any internal pests. Similar inspections were done from 2005 to 2008 at arrival in Europe following standard export procedures. Analysis indicated that Hass avocado is a conditional nonhost for C. capitata and a poor but potential host for C. rosa and C. cosyra. No requirement for a risk mitigation treatment for C. capitata on South African Hass avocado was found. Fruit sampling data did not produce any infested fruit, suggesting that natural conditions and/or existing procedures functioning in a systems approach are likely to mitigate the quarantine risks of C. rosa and C. cosyra on Hass avocado in South Africa.
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Affiliation(s)
- J de Graaf
- South African Subtropical Growers Association, P.O. Box 866, Tzaneen 0850, South Africa.
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Holewijn S, den Heijer M, Swinkels DW, Stalenhoef AFH, de Graaf J. Brachial artery diameter is related to cardiovascular risk factors and intima-media thickness. Eur J Clin Invest 2009; 39:554-60. [PMID: 19453648 DOI: 10.1111/j.1365-2362.2009.02152.x] [Citation(s) in RCA: 27] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND Previous reports showed inconsistent results about the potential role of flow-mediated dilatation (FMD) in cardiovascular(CV) risk prediction. Few data are available about the role of nitroglycerin-mediated dilatation (NMD), but recently, brachial artery diameter(BAD) appeared to have predictive value in CV risk prediction.We determined the relation of FMD, BAD and NMD with known CV risk factors and intima-media thickness (IMT), a well-established surrogate marker of atherosclerosis, in a community-based population, the Nijmegen Biomedical Study (NBS). MATERIALS AND METHODS FMD, BAD and NMD were measured in the brachial, and IMT in the common carotid artery ultrasononically in 337 participants, aged 50-70 years. Traditional clinical and biochemical parameters were determined. RESULTS Both FMD and NMD were not correlated with most CV risk factors or prevalent CVD. However, both IMT and BAD did show significant correlations with CV risk factors. In accordance, both IMT and BAD were significantly correlated with prevalent CVD (r=0.62 and r=-0.37, respectively) . Furthermore, FMD was not correlated with IMT and did hardly (R2=1.1%) improve the prediction of IMT by CV risk factors in regression analysis. However, both BAD and NMD did correlate with IMT (r=-0.29 and r=0.25, respectively). CONCLUSION In our study, FMD and NMD were not related to known CV risk factors and prevalent CVD, and FMD was not correlated with IMT, a surrogate marker of atherosclerosis. Most intriguingly, BAD was significantly correlated with some CV risk factors, prevalent CVD and IMT. So, BAD is a potential valuable tool in CV risk prediction in middle-aged low-risk populations, whereas FMD is not.
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Affiliation(s)
- S Holewijn
- Department of General Internal Medicine, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands.
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van Himbergen T, Schaefer E, Matthan N, de Graaf J, Stalenhoef A. Abstract: 47 EVIDENCE OF INCREASED CHOLESTEROL SYNTHESIS IN FAMILIAL COMBINED HYPERLIPIDEMIA. ATHEROSCLEROSIS SUPP 2009. [DOI: 10.1016/s1567-5688(09)70206-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Bonnard M, Spieser L, Meziane H, de Graaf J, Pailhous J. How cognition can influence the excitability of the primary motor cortex? A TMS-EEG study. Brain Stimul 2008. [DOI: 10.1016/j.brs.2008.06.229] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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van Tits LJH, Jacobs EMG, Swinkels DW, Lemmers HLM, van der Vleuten GM, de Graaf J, Stalenhoef AFH. Non-transferrin-bound iron is associated with plasma level of soluble intercellular adhesion molecule-1 but not with in vivo low-density lipoprotein oxidation. Atherosclerosis 2007; 194:272-8. [PMID: 16963052 DOI: 10.1016/j.atherosclerosis.2006.08.012] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/07/2006] [Revised: 07/18/2006] [Accepted: 08/02/2006] [Indexed: 11/18/2022]
Abstract
BACKGROUND Excess body iron is associated with increased cardiovascular disease risk, possibly via non-transferrin-bound iron (NTBI)-mediated enhancement of inflammation and oxidation of low-density lipoprotein (LDL). METHODS We assessed this proposed atherosclerotic mechanism of body iron by determining the relationship of levels of serum iron parameters, including NTBI, with plasma markers of inflammation and LDL oxidation in 232 subjects who visited the outpatient clinic for hemochromatosis family screening. RESULTS Plasma level of soluble intercellular adhesion molecule-1 (sICAM-1) was positively related to ferritin (standardized beta coefficient 0.16) and to NTBI (0.185) and negatively to total iron-binding capacity (TIBC, -0.166). Significant higher levels of sICAM-1 were found for subjects in the highest quartile of NTBI compared to the lowest quartile of NTBI (122 microg/L (107-141) and 106 microg/L (89-125), median (interquartile range), p<0.001). Odds ratio of subjects having sICAM-1 level above 134 microg/L (75th percentile) in the highest and lowest quartile of NTBI amounted 2.3. White blood cell count was positively related to ferritin (0.149). High-sensitivity C-reactive protein, interleukin-6, interleukin-8, oxidized LDL, oxidized LDL/apolipoprotein B and IgG and IgM antibodies to oxidized LDL were not related to any of the markers of iron status. CONCLUSION Excess body iron, reflected by elevated serum ferritin and NTBI and decreased TIBC, is associated with increased plasma level of sICAM-1 but not with markers of in vivo LDL oxidation.
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Affiliation(s)
- L J H van Tits
- Department of General Internal Medicine, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands.
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van Tits L, van Heerde W, van der Vleuten G, de Graaf J, Grobbee D, van de Vijver L, Stalenhoef A, Princen H. PO10-274 RATIO OF PLASMA OXIDIZED LOW-DENSITY LIPOPROTEIN AND ANNEXIN A5 POSITIVELY RELATES TO SEVERITY OF CARDIOVASCULAR DISEASE. ATHEROSCLEROSIS SUPP 2007. [DOI: 10.1016/s1567-5688(07)71284-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Brouwers M, van Greevenbroek M, de Graaf J, Georgieva A, van der Kallen C, ter Avest E, Stehouwer C, Stalenhoef A, de Bruin T. PO3-81 PARABOLIC RELATION BETWEEN PLASMA TRIGLYCERIDES AND LDL-CHOLESTEROL IN FAMILIAL COMBINED HYPERLIPIDEMIA: THE MULTIPLE-TYPE HYPERLIPIDEMIA EXPLAINED? ATHEROSCLEROSIS SUPP 2007. [DOI: 10.1016/s1567-5688(07)71091-7] [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: 11/16/2022]
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Abstract
BACKGROUND Familial combined hyperlipidaemia (FCH) is characterized by dyslipidaemia, visceral obesity and insulin resistance, and is associated with an increased intima-media thickness (IMT) and an increased risk for cardiovascular disease. In the present study, we investigated whether FCH is associated with early functional vascular wall changes, as represented by endothelial dysfunction, and we determined whether endothelial function in FCH is related to any of the cardiovascular risk factors associated with the FCH phenotype, or to the (increased) IMT. DESIGN In 98 patients with FCH [mean age 51 (48-54) years, 43% male] and 230 unaffected relatives [mean age 44 (42-46) years, 48% male], venous blood was drawn in the fasting state after discontinuation of lipid lowering drugs for at least 4 weeks (if used). IMT was measured by B-mode ultrasound and endothelial function was assessed by determination of flow mediated dilation (FMD) and by measurement of plasma concentrations of various soluble adhesion molecules, including soluble vascular cell adhesion molecule (sVCAM), soluble intercellular adhesion molecule (sICAM) and soluble E-selectin. RESULTS There were no significant differences between FCH patients and their non-affected relatives in FMD [2.9 (2.3-3.6%) vs. 2.8 (2.5-3.2%)] or in the plasma concentrations of the various adhesion molecules. None of the individual clinical and biochemical cardiovascular risk factors was an independent predictor of endothelial function in patients with FCH, nor was IMT. However, subgroup analysis revealed that IMT was an independent and powerful predictor of FMD in subjects with carotid artery plaques (St. beta = 4.11, P < 0.004), whereas IMT was no significant predictor in subjects without plaques. CONCLUSIONS FCH patients have no impaired endothelial function when compared to their unaffected relatives. IMT is an important predictor of FMD when advanced morphological wall changes are present. Our results question the value of FMD measurements for cardiovascular risk stratification in populations with an anticipated high cardiovascular risk.
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Affiliation(s)
- E Ter Avest
- Radboud University, Nijmegen Medical Centre, Nijmegen, The Netherlands
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Holewijn S, de Graaf J, den Heijer M, Stalenhoef A. P.058 ENDOTHELIAL DYSFUNCTION AS MEASURED BY FLOW MEDIATED DILATATION (FMD) IN CARDIOVASCULAR RISK ASSESSMENT. Artery Res 2007. [DOI: 10.1016/j.artres.2007.07.115] [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] Open
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Vermeulen SHHM, van der Vleuten GM, de Graaf J, Hermus AR, Blom HJ, Stalenhoef AFH, den Heijer M. A genome-wide linkage scan for homocysteine levels suggests three regions of interest. J Thromb Haemost 2006; 4:1303-7. [PMID: 16706975 DOI: 10.1111/j.1538-7836.2006.01977.x] [Citation(s) in RCA: 14] [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: 11/28/2022]
Abstract
BACKGROUND An elevated plasma total homocysteine (tHcy) level is a risk factor for many clinical conditions, including vascular disease and venous thrombosis. The tHcy levels are partly determined by genetic factors. Extensive candidate gene studies have identified several genetic variants, including the MTHFR 677C>T, that influence tHcy levels, but so far only part of the genetic variation in tHcy can be explained. OBJECTIVE In order to identify chromosomal regions that influence tHcy levels, a genome-wide linkage analysis was conducted. PATIENTS/METHODS Our study population consisted of 13 pedigrees and 469 subjects with data on fasting plasma tHcy levels. A set of 377 markers covering the genome was genotyped in 275 subjects. The variance component linkage method (SOLAR version 2.1.3) was used for the two-point and multipoint linkage analyses. RESULTS The heritability of the age- and sex-adjusted homocysteine levels was 44%. The multipoint linkage analysis identified one region with suggestive linkage on chromosome 16q (LOD score 1.76; nominal P = 0.0024). Weaker evidence of linkage was found for regions on chromosome 12q (LOD score 1.57; nominal P = 0.0036) and chromosome 13q (LOD score 1.52; nominal P = 0.0041). CONCLUSIONS In our families the plasma tHcy level was highly heritable. The multipoint linkage analysis identified three regions that showed weak to suggestive linkage to tHcy levels.
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Affiliation(s)
- S H H M Vermeulen
- Department of Endocrinology, Radboud University Nijmegen Medical Centre, Nijmegen, Netherlands.
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Barter PJ, Ballantyne CM, Carmena R, Castro Cabezas M, Chapman MJ, Couture P, de Graaf J, Durrington PN, Faergeman O, Frohlich J, Furberg CD, Gagne C, Haffner SM, Humphries SE, Jungner I, Krauss RM, Kwiterovich P, Marcovina S, Packard CJ, Pearson TA, Reddy KS, Rosenson R, Sarrafzadegan N, Sniderman AD, Stalenhoef AF, Stein E, Talmud PJ, Tonkin AM, Walldius G, Williams KMS. Apo B versus cholesterol in estimating cardiovascular risk and in guiding therapy: report of the thirty-person/ten-country panel. J Intern Med 2006; 259:247-58. [PMID: 16476102 DOI: 10.1111/j.1365-2796.2006.01616.x] [Citation(s) in RCA: 339] [Impact Index Per Article: 18.8] [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: 12/23/2022]
Abstract
There is abundant evidence that the risk of atherosclerotic vascular disease is directly related to plasma cholesterol levels. Accordingly, all of the national and transnational screening and therapeutic guidelines are based on total or LDL cholesterol. This presumes that cholesterol is the most important lipoprotein-related proatherogenic risk variable. On the contrary, risk appears to be more directly related to the number of circulating atherogenic particles that contact and enter the arterial wall than to the measured concentration of cholesterol in these lipoprotein fractions. Each of the atherogenic lipoprotein particles contains a single molecule of apolipoprotein (apo) B and therefore the concentration of apo B provides a direct measure of the number of circulating atherogenic lipoproteins. Evidence from fundamental, epidemiological and clinical trial studies indicates that apo B is superior to any of the cholesterol indices to recognize those at increased risk of vascular disease and to judge the adequacy of lipid-lowering therapy. On the basis of this evidence, we believe that apo B should be included in all guidelines as an indicator of cardiovascular risk. In addition, the present target adopted by the Canadian guideline groups of an apo B <90 mg dL(-1) in high-risk patients should be reassessed in the light of the new clinical trial results and a new ultra-low target of <80 mg dL(-1) be considered. The evidence also indicates that the apo B/apo A-I ratio is superior to any of the conventional cholesterol ratios in patients without symptomatic vascular disease or diabetes to evaluate the lipoprotein-related risk of vascular disease.
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Affiliation(s)
- P J Barter
- Heart Research Institute, Camperdown, Sydney, NSW, Australia
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van der Vleuten GM, Kluijtmans LA, Hijmans A, Blom HJ, Stalenhoef AFH, de Graaf J. The Gln223Arg polymorphism in the leptin receptor is associated with familial combined hyperlipidemia. Int J Obes (Lond) 2006; 30:892-8. [PMID: 16432543 DOI: 10.1038/sj.ijo.0803234] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
OBJECTIVE Familial combined hyperlipidemia (FCH) is characterized by elevated levels of total cholesterol (TC), triglycerides (TG) and apolipoprotein B (apo B) and is associated with premature cardiovascular disease (CVD). Other features of FCH are obesity and insulin resistance. Serum leptin levels have also been associated with obesity, insulin resistance and atherosclerosis. Leptin exerts its effect through the leptin receptor (LEPR). The aim of this study is to determine whether the Gln223Arg polymorphism in the LEPR gene contributes to FCH and its associated phenotypes. METHODS The study population consists of 37 families, comprising 644 subjects, of whom 158 subjects were diagnosed as FCH. The FCH diagnosis was based on plasma TC and TG levels, adjusted for age and gender, and absolute apo B levels, according to our recently published nomogram. The Gln223Arg polymorphism was studied by restriction fragment length polymorphism-PCR. RESULTS Carriers of one or two Arg alleles had an increased risk of FCH, compared to subjects homozygous for the Gln allele (OR=1.6 [95% CI 1.0-2.4]). A difference in high-density lipoprotein cholesterol (HDL-c) levels was present between carriers and non-carriers of an Arg allele, 1.21 vs 1.28 mmol/l, respectively (P=0.04), but no differences in obesity, insulin resistance and other lipid parameters were found. CONCLUSION The Gln223Arg polymorphism in the LEPR gene is associated with FCH, which is supported by a significant association between HDL-c levels and the LEPR gene.
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Affiliation(s)
- G M van der Vleuten
- Department of Medicine, Division of General Internal Medicine, Nijmegen, The Netherlands.
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van der Vleuten G, Isaacs A, Zeng W, Talmud P, van Duijn C, Stalenhoef A, de Graaf J. We-W30:6 The APOAV gene is associated with familial combined hyperlipidemia and dyslipidemia. ATHEROSCLEROSIS SUPP 2006. [DOI: 10.1016/s1567-5688(06)81231-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Himbergen TM, van Tits LJH, Voorbij HAM, de Graaf J, Stalenhoef AFH, Roest M. The effect of statin therapy on plasma high-density lipoprotein cholesterol levels is modified by paraoxonase-1 in patients with familial hypercholesterolaemia. J Intern Med 2005; 258:442-9. [PMID: 16238680 DOI: 10.1111/j.1365-2796.2005.01557.x] [Citation(s) in RCA: 12] [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: 11/30/2022]
Abstract
OBJECTIVES Statins reduce low-density lipoprotein cholesterol (LDL-C) and can raise high-density lipoprotein cholesterol (HDL-C). HDL-bound paraoxonase-1 (PON1) is associated with variations in plasma HDL-C, and may, therefore, contribute to changes of HDL-C during statin therapy. DESIGN The effects of baseline PON1 status to HDL-C changes because of statin therapy were investigated. PON1 status was determined with (i) PON1 -107C>T and 192Q>R genotype, (ii) PON1 levels and (iii) PON1 paraoxonase, diazoxonase and arylesterase activity. SETTING Radboud University Nijmegen Medical Centre, Nijmegen, the Netherlands. SUBJECTS A total of 134 familial hypercholesterolaemia (FH) patients undergoing atorvastatin or simvastatin therapy. RESULTS PON1 levels and activities significantly modified the HDL-C increment (P=0.002 for PON1 levels and arylesterase activity and P=0.001 for diazoxonase activity). The effects were even more evident amongst subgroup classifications based on PON1 status and baseline HDL-C concentrations: the HDL-C increment was more pronounced in subgroups of -107CT/TT or 192QR/RR genotype combined with low baseline HDL-C (+13.9%, P<0.001, respectively+15.4%, P<0.001). In contrast, the -107CC or 192QQ genotype in combination with high baseline HDL-C, did not show a significant increase of HDL-C. CONCLUSIONS PON1 status in conjunction with baseline HDL-C levels predicts HDL-C increment during statin therapy in FH patients.
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Affiliation(s)
- T M Himbergen
- Research Laboratory of the Department of Clinical Chemistry, University Medical Centre Utrecht, Utrecht, the Netherlands.
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Abstract
BACKGROUND By influencing the mevalonate pathway, statins may have multiple effects besides lipid lowering. This study was designed to evaluate the effect of rosuvastatin on serum lipids and insulin sensitivity in nondiabetic subjects with familial combined hyperlipidaemia (FCH), a population characterized by decreased insulin sensitivity. METHODS In a double-blind randomized crossover study, 18 subjects with FCH (without evident cardiovascular disease, mean age 54 +/- 7 years) were randomized to rosuvastatin 40 mg day(-1) or placebo for 12 weeks. Blood samples were taken at baseline and after 4, 8 and 12 weeks of both treatment periods. Insulin sensitivity was determined with euglycaemic-hyperinsulinaemic clamp after 12 weeks of both treatment periods. RESULTS Serum lipids and lipoproteins improved significantly. Mean total cholesterol after the rosuvastatin treatment period was 44% lower compared to the placebo treatment period (triglycerides -28%; LDL-c -50%; VLDL-c -56%, VLDL-TG -39%) and both parameters of low-grade inflammation (as measured by hsCRP, -16%) and oxidative stress (as measured by plasma-oxLDL, -55%) decreased markedly after rosuvastatin therapy as compared to placebo. However, the insulin sensitivity index was unchanged (41.7 +/- 17.4 vs. 40.6 +/- 11.1 L kg(-1) min(-1), placebo vs. rosuvastatin, P = 0.71). CONCLUSION Despite marked improvements in lipid and lipoprotein values, low-grade inflammation and oxidative stress, a relatively high dose of rosuvastatin did not change insulin sensitivity in subjects with FCH.
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Affiliation(s)
- E ter Avest
- Department of Medicine, Radboud University Nijmegen, Medical Centre, The Netherlands
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van Tits LJH, van Himbergen TM, Lemmers HLM, de Graaf J, Stalenhoef AFH. Proportion of oxidized LDL relative to plasma apolipoprotein B does not change during statin therapy in patients with heterozygous familial hypercholesterolemia. Atherosclerosis 2005; 185:307-12. [PMID: 16005883 DOI: 10.1016/j.atherosclerosis.2005.06.006] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/07/2005] [Revised: 05/25/2005] [Accepted: 06/02/2005] [Indexed: 11/22/2022]
Abstract
OBJECTIVE Circulating oxidized low-density lipoprotein (LDL) has been shown to be a useful marker for identifying patients with coronary heart disease (CHD) and persons at high cardiovascular risk. The effect of cholesterol-lowering therapy on plasma level of oxidized LDL is not clear. METHODS AND RESULTS We investigated effects of cholesterol lowering by therapeutic intervention (2 years) with atorvastatin (80 mg daily) and simvastatin (40 mg daily) on circulating oxidized LDL (absolute level and in proportion to plasma apolipoprotein B) in relation to atherosclerosis progression (carotid intima-media thickness, carotid IMT) and to inflammation (high-sensitivity C-reactive protein, hsCRP) in 115 stable patients with heterozygous familial hypercholesterolemia (FH). Atorvastatin and simvastatin reduced plasma-oxidized LDL (-43 and -35%, respectively) in proportion to the decrease in plasma apolipoprotein B. Neither absolute nor relative level of oxidized LDL correlated with carotid IMT or hsCRP at baseline. Also changes in levels of circulating oxidized LDL were not related to changes in carotid IMT and hsCRP. CONCLUSIONS In familial hypercholesterolemia-oxidized LDL carried in plasma is strongly associated with apolipoprotein B but not with inflammation nor with carotid IMT, and statin treatment does not reduce oxidized LDL relative to apolipoprotein B.
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Affiliation(s)
- L J H van Tits
- Radboud University Nijmegen Medical Centre, Department of General Internal Medicine 564, Geert Grooteplein Zuid 8, P.O. Box 9101, 6500 HB Nijmegen, The Netherlands.
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Abstract
OBJECTIVE Insulin resistance is associated with increased triglyceride levels, low high-density lipoprotein cholesterol, small dense low-density lipoprotein (LDL), and increased apolipoprotein B (apoB) levels, all characteristics of familial combined hyperlipidemia (FCH). Therefore, we explored the role of insulin resistance in FCH lipid phenotype expression. METHODS AND RESULTS FCH was defined by traditional diagnostic criteria including plasma total cholesterol or triglyceride levels >90th percentile. Insulin resistance was assessed by the Homeostasis Model Assessment (HOMA) index. In total, 132 subjects with FCH, 350 normolipidemic relatives, and 81 spouses who referenced as controls were studied. FCH subjects were significantly more insulin resistant compared with controls and normolipidemic relatives (HOMA index 2.9 [95% CI, 2.6 to 3.2], 2.2 [95% CI, 2.0 to 2.5], and 2.0 [95% CI, 1.9 to 2.2], respectively), even after correction for sex, age, and body mass index (BMI). The degree of insulin resistance was associated with the lipid phenotype expression, and a change in insulin-resistant state was associated with a change in lipid phenotype expression over 5 years. For any level of insulin resistance and degree of obesity, FCH subjects had increased levels of apoB and more small dense LDL compared with controls. CONCLUSIONS Insulin resistance is a characteristic feature of FCH, which is not fully explained by their increased BMI and is associated with (change in) lipid phenotype expression. Furthermore, our results support the concept of genetic origin of high apoB and small dense LDL in FCH, which is modulated by insulin resistance and obesity.
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Affiliation(s)
- M J Veerkamp
- Department of Medicine, Division of General Internal Medicine, University Medical Center Nijmegen, Nijmegen, The Netherlands
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ter Avest E, Abbink E, de Graaf J, Tack C, Stalenhoef A. W16-P-087 Effects of rosuvastatin on insulin sensitivity in patients with familial combined hyperlipidemia (FCH). ATHEROSCLEROSIS SUPP 2005. [DOI: 10.1016/s1567-5688(05)80483-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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van der Vleuten G, van Tits L, den Heijer M, Hak-Lemmers H, Stalenhoef A, de Graaf J. W08-O-002 Decreased adiponectin levels in patients with familial combined hyperlipidemia. ATHEROSCLEROSIS SUPP 2005. [DOI: 10.1016/s1567-5688(05)80115-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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van Tits L, van der Vleuten G, de Graaf J, Grobbee D, van de Vijver L, Stalenhoef A, Princen H. W12-P-082 Subjects presenting with clinical suspect symptoms for CAD but having normal angiogram and lipid profile exhibit elevated plasma oxidized LDL. ATHEROSCLEROSIS SUPP 2005. [DOI: 10.1016/s1567-5688(05)80325-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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de Lange J, de Graaf J, Veldhuijzen van Zanten L, Waalkens HA. [Treatment of snoring and sleep apnea. Maxillo-mandibular advancement osteotomy]. Ned Tijdschr Tandheelkd 2004; 111:287-90. [PMID: 15315109] [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: 04/30/2023]
Abstract
In this article, a patient is presented who was treated by a maxillo-mandibular advancement osteotomy, in order to increase the volume of the oropharynx as a final treatment of the obstructive sleep apnea syndrome. This syndrome is a common affliction, characterized by excessive daytime sleepiness and unintentionally falling asleep. It can be diagnosed by patient history and polysomnography. Nasal-continuous positive airway pressure is the golden standard of treatment. However, in mild to moderate cases of the syndrome, treatment with a mandibular reposition appliance is also an option. The extraoral device of the first treatment option as well as the intraoral appliance of the second treatment option are demanding patients' compliance. Therefore, research into other treatments is necessary. The initial results of the advancement osteotomy among six patients were very good and in accordance with other literature reports. These results justify further research to clarify the importance of this treatment option of the obstructive sleep apnea syndrome.
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Affiliation(s)
- J de Lange
- Afdeling Mondziekten en Kaakchirurgie, Isala Klinieken, Zwolle.
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Voorbij H, van Himbergen T, de Graaf J, Hattori H, Kastelein J, van Tits L, Stalenhoef A, Roest M. W14.396 The effects of paraoxonase on cholesterol lowering by simvastatin and atorvastatin. ATHEROSCLEROSIS SUPP 2004. [DOI: 10.1016/s1567-5688(04)90395-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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