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van Ingen E, Engbers PA, Woudenberg T, van der Bent ML, Mei H, Wojta J, Quax P, Nossent AY. C/D box snoRNA SNORD113-6 guides 2´-O-methylation and protects against site-specific fragmentation of tRNALeu(TAA) in vascular remodelling. Molecular Therapy - Nucleic Acids 2022; 30:162-172. [PMID: 36250206 PMCID: PMC9547152 DOI: 10.1016/j.omtn.2022.09.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Accepted: 09/15/2022] [Indexed: 11/27/2022]
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Abstract
Purpose of Review Small non-coding RNAs regulate gene expression and are highly implicated in heart failure. Recently, an additional level of post-transcriptional regulation has been identified, referred to as the epitranscriptome, which encompasses the body of post-transcriptional modifications that are placed on RNA molecules. In this review, we summarize the current knowledge on the small non-coding RNA epitranscriptome in heart failure. Recent Findings With the rise of new methods to study RNA modifications, epitranscriptome research has begun to take flight. Over the past 3 years, the number of publications on the epitranscriptome in heart failure has significantly increased, and we expect many more highly relevant publications to come out over the next few years. Summary Currently, at least six modifications on small non-coding RNAs have been investigated in heart failure-relevant studies, namely N6-adenosine, N5-cytosine and N7-guanosine methylation, 2’-O-ribose-methylation, adenosine-to-inosine editing, and isomiRs. Their potential role in heart failure is discussed.
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Affiliation(s)
- Tamar Woudenberg
- Department of Surgery, Leiden University Medical Center, D6-P, PO Box 9600, 2300 RC, Leiden, the Netherlands.,Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, the Netherlands
| | - Nyika D Kruyt
- Department of Neurology, Leiden University Medical Center, Leiden, the Netherlands
| | - Paul H A Quax
- Department of Surgery, Leiden University Medical Center, D6-P, PO Box 9600, 2300 RC, Leiden, the Netherlands.,Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, the Netherlands
| | - A Yaël Nossent
- Department of Surgery, Leiden University Medical Center, D6-P, PO Box 9600, 2300 RC, Leiden, the Netherlands. .,Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, the Netherlands.
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3
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Aardoom JJ, Hilt AD, Woudenberg T, Chavannes NH, Atsma DE. A Preoperative Virtual Reality App for Patients Scheduled for Cardiac Catheterization: Pre–Post Questionnaire Study Examining Feasibility, Usability, and Acceptability. JMIR Cardio 2022; 6:e29473. [PMID: 35191839 PMCID: PMC8905473 DOI: 10.2196/29473] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 07/30/2021] [Accepted: 12/29/2021] [Indexed: 11/16/2022] Open
Abstract
Background Pre- and postoperative anxiety is a common phenomenon associated with negative postoperative outcomes. Symptoms of posttraumatic stress disorder, such as fear, nightmares, and sleep deprivation, are prevalent in approximately 30% to 50% of patients following discharge from intensive care units after cardiac surgery. Preliminary evidence suggests a promising role of virtual reality (VR) in preventing stress-related reactions using stress inoculation training. Such training enables cognitive preparation of individuals for stressful situations, thereby becoming more tolerant and resistant to stress, subsequently reducing the risk of potential negative psychological consequences. This study investigated a preoperative VR app—Pre-View—aimed at better informing and preparing patients for cardiac catheterization. Objective This study aims to assess the feasibility, usability, and acceptability of Pre-View in patients undergoing cardiac catheterization. Methods Eligible participants were adults scheduled for elective cardiac catheterization. Pre-View comprised an interactive virtual representation of the whole care process related to cardiac catheterization, from entering the hospital for admission to postprocedural stay and discharge. These processes were represented through 360° videos and interactive photos. Self-report questionnaires were completed at baseline (ie, before catheterization and after undergoing the VR experience) and after cardiac catheterization. Outcome measures included user experience and satisfaction, VR presence and immersive tendencies, and user friendliness. The perceived effectiveness was assessed exploratively. Results A total of 8 individuals, with a mean age of 67 (SD 7.5) years, participated in this study. Half of them underwent the VR experience at the hospital and the other half at home. Participants reported high levels of presence in the virtual environment (Presence Questionnaire score: mean 129.1, SD 13.4). The usability of Pre-View was well evaluated (System Usability Scale score: mean 89.1, SD 12.0), and patient satisfaction was high (Client Satisfaction Questionnaire score: mean 27.1, SD 3.2). Usability and satisfaction scores were higher for participants who underwent Pre-View at home versus those who underwent Pre-View at the hospital, although the latter group was significantly older; 72.8 versus 61.3, respectively. All participants reported Pre-View to be effective in terms of feeling better informed about the care process of cardiac catheterization. Most participants (7/8, 88%) reported Pre-View to be effective in terms of feeling better prepared for cardiac catheterization, acknowledging the potential of Pre-View in reducing negative psychological consequences after catheterization. Conclusions The results provide initial support for the feasibility and acceptability of a preoperative VR app, creating a virtual environment that supports patient education and preparation for upcoming cardiac catheterization. More studies are needed to further investigate the effects of VR as a tool to better prepare patients for medical procedures, its effectiveness in reducing negative patient outcomes (eg, anxiety, stress, and postoperative recovery outcomes), and the generalizability of effects across different settings and patient populations.
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Affiliation(s)
- Jiska J Aardoom
- Department of Public Health and Primary Care, Leiden University Medical Center, Leiden, Netherlands
- National eHealth Living Lab, Leiden, Netherlands
| | - Alexander D Hilt
- Department of Cardiology, Leiden University Medical Center, Leiden, Netherlands
| | - Tamar Woudenberg
- Department of Cardiology, Leiden University Medical Center, Leiden, Netherlands
- Department of Surgery, Leiden University Medical Center, Leiden, Netherlands
| | - Niels H Chavannes
- Department of Public Health and Primary Care, Leiden University Medical Center, Leiden, Netherlands
- National eHealth Living Lab, Leiden, Netherlands
| | - Douwe E Atsma
- National eHealth Living Lab, Leiden, Netherlands
- Department of Cardiology, Leiden University Medical Center, Leiden, Netherlands
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van Ingen E, Foks AC, Woudenberg T, van der Bent ML, de Jong A, Hohensinner PJ, Wojta J, Bot I, Quax PHA, Nossent AY. Inhibition of microRNA-494-3p activates Wnt signaling and reduces proinflammatory macrophage polarization in atherosclerosis. Mol Ther Nucleic Acids 2021; 26:1228-1239. [PMID: 34853722 PMCID: PMC8607137 DOI: 10.1016/j.omtn.2021.10.027] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Revised: 09/24/2021] [Accepted: 10/28/2021] [Indexed: 12/31/2022]
Abstract
We have previously shown that treatment with third-generation antisense oligonucleotides against miR-494-3p (3GA-494) reduces atherosclerotic plaque progression and stabilizes lesions, both in early and established plaques, with reduced macrophage content in established plaques. Within the plaque, different subtypes of macrophages are present. Here, we aimed to investigate whether miR-494-3p directly influences macrophage polarization and activation. Human macrophages were polarized into either proinflammatory M1 or anti-inflammatory M2 macrophages and simultaneously treated with 3GA-494 or a control antisense (3GA-ctrl). We show that 3GA-494 treatment inhibited miR-494-3p in M1 macrophages and dampened M1 polarization, while in M2 macrophages miR-494-3p expression was induced and M2 polarization enhanced. The proinflammatory marker CCR2 was reduced in 3GA-494-treated atherosclerosis-prone mice. Pathway enrichment analysis predicted an overlap between miR-494-3p target genes in macrophage polarization and Wnt signaling. We demonstrate that miR-494-3p regulates expression levels of multiple Wnt signaling components, such as LRP6 and TBL1X. Wnt signaling appears activated upon treatment with 3GA-494, both in cultured M1 macrophages and in plaques of hypercholesterolemic mice. Taken together, 3GA-494 treatment dampened M1 polarization, at least in part via activated Wnt signaling, while M2 polarization was enhanced, which is both favorable in reducing atherosclerotic plaque formation and increasing plaque stability.
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Affiliation(s)
- Eva van Ingen
- Department of Surgery, Leiden University Medical Center, 2300 RC Leiden, the Netherlands.,Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, 2300 RC Leiden, the Netherlands.,Division of BioTherapeutics, LACDR, Leiden University, 2333 CC Leiden, The Netherlands
| | - Amanda C Foks
- Division of BioTherapeutics, LACDR, Leiden University, 2333 CC Leiden, The Netherlands
| | - Tamar Woudenberg
- Department of Surgery, Leiden University Medical Center, 2300 RC Leiden, the Netherlands.,Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, 2300 RC Leiden, the Netherlands
| | - M Leontien van der Bent
- Department of Surgery, Leiden University Medical Center, 2300 RC Leiden, the Netherlands.,Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, 2300 RC Leiden, the Netherlands
| | - Alwin de Jong
- Department of Surgery, Leiden University Medical Center, 2300 RC Leiden, the Netherlands.,Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, 2300 RC Leiden, the Netherlands
| | - Philipp J Hohensinner
- Department of Internal Medicine II, Medical, University of Vienna, 1090 Vienna, Austria
| | - Johann Wojta
- Department of Internal Medicine II, Medical, University of Vienna, 1090 Vienna, Austria.,Ludwig Boltzmann Institute for Cardiovascular Research, 1090 Vienna, Austria
| | - Ilze Bot
- Division of BioTherapeutics, LACDR, Leiden University, 2333 CC Leiden, The Netherlands
| | - Paul H A Quax
- Department of Surgery, Leiden University Medical Center, 2300 RC Leiden, the Netherlands.,Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, 2300 RC Leiden, the Netherlands
| | - Anne Yaël Nossent
- Department of Surgery, Leiden University Medical Center, 2300 RC Leiden, the Netherlands.,Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, 2300 RC Leiden, the Netherlands.,Department of Internal Medicine II, Medical, University of Vienna, 1090 Vienna, Austria.,Department of Laboratory Medicine, University of Vienna, 1090 Vienna, Austria
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Böhm S, Woudenberg T, Chen D, Marosevic DV, Böhmer MM, Hansen L, Wallinga J, Sing A, Katz K. Epidemiology and transmission characteristics of early COVID-19 cases, 20 January-19 March 2020, in Bavaria, Germany. Epidemiol Infect 2021; 149:e65. [PMID: 33650470 PMCID: PMC7985897 DOI: 10.1017/s0950268821000510] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 01/13/2021] [Accepted: 02/25/2021] [Indexed: 01/18/2023] Open
Abstract
Severe acute respiratory syndrome-coronavirus-2 (SARS-CoV-2) led to a significant disease burden and disruptions in health systems. We describe the epidemiology and transmission characteristics of early coronavirus disease 2019 (COVID-19) cases in Bavaria, Germany. Cases were reverse transcription polymerase chain reaction (RT-PCR)-confirmed SARS-CoV-2 infections, reported from 20 January-19 March 2020. The incubation period was estimated using travel history and date of symptom onset. To estimate the serial interval, we identified pairs of index and secondary cases. By 19 March, 3546 cases were reported. A large proportion was exposed abroad (38%), causing further local transmission. Median incubation period of 256 cases with exposure abroad was 3.8 days (95%CI: 3.5-4.2). For 95% of infected individuals, symptom onset occurred within 10.3 days (95%CI: 9.1-11.8) after exposure. The median serial interval, using 53 pairs, was 3.5 days (95%CI: 3.0-4.2; mean: 3.9, s.d.: 2.2). Travellers returning to Germany had an important influence on the spread of SARS-CoV-2 infections in Bavaria in early 2020. Especially in times of low incidence, public health agencies should identify holiday destinations, and areas with ongoing local transmission, to monitor potential importation of SARS-CoV-2 infections. Travellers returning from areas with ongoing community transmission should be advised to quarantine to prevent re-introductions of COVID-19.
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Affiliation(s)
- S. Böhm
- Bavarian Health and Food Safety Authority, Oberschleissheim, Germany
- ECDC Fellowship Programme, Field Epidemiology path (EPIET), European Centre for Disease Prevention and Control (ECDC), Stockholm, Sweden
- Postgraduate Training for Applied Epidemiology (PAE), Robert Koch Institute, Berlin, Germany
| | - T. Woudenberg
- Bavarian Health and Food Safety Authority, Oberschleissheim, Germany
- ECDC Fellowship Programme, Field Epidemiology path (EPIET), European Centre for Disease Prevention and Control (ECDC), Stockholm, Sweden
| | - D. Chen
- National Institute for Public Health and the Environment (RIVM), Bilthoven, Netherlands
| | - D. V. Marosevic
- Bavarian Health and Food Safety Authority, Oberschleissheim, Germany
| | - M. M. Böhmer
- Bavarian Health and Food Safety Authority, Oberschleissheim, Germany
- Institute of Social Medicine and Health Systems Research, Otto-von-Guericke-University Magdeburg, Magdeburg, Germany
| | - L. Hansen
- ECDC Fellowship Programme, Field Epidemiology path (EPIET), European Centre for Disease Prevention and Control (ECDC), Stockholm, Sweden
- National Institute for Public Health and the Environment (RIVM), Bilthoven, Netherlands
| | - J. Wallinga
- National Institute for Public Health and the Environment (RIVM), Bilthoven, Netherlands
- Department of Biomedical Data Sciences, Leiden University Medical Center, Leiden, Netherlands
| | - A. Sing
- Bavarian Health and Food Safety Authority, Oberschleissheim, Germany
| | - K. Katz
- Bavarian Health and Food Safety Authority, Oberschleissheim, Germany
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van Dam A, Woudenberg T, de Melker H, Wallinga J, Hahné S. Effect of vaccination on severity and infectiousness of measles during an outbreak in the Netherlands, 2013-2014. Epidemiol Infect 2020; 148:e81. [PMID: 32200773 PMCID: PMC7189345 DOI: 10.1017/s0950268820000692] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Revised: 01/28/2020] [Accepted: 03/04/2020] [Indexed: 11/17/2022] Open
Abstract
An outbreak of measles in the Netherlands in 2013-2014 provided an opportunity to assess the effect of MMR vaccination on severity and infectiousness of measles.Measles is notifiable in the Netherlands. We used information on vaccination, hospitalisation, complications, and most likely source(s) of infection from cases notified during the outbreak. When a case was indicated as a likely source for at least one other notified case, we defined it as infectious. We estimated the age-adjusted effect of vaccination on severity and infectiousness with logistic regression.Of 2676 notified cases, 2539 (94.9%) were unvaccinated, 121 (4.5%) were once-vaccinated and 16 (0.6%) were at least twice-vaccinated; 328 (12.3%) cases were reported to have complications and 172 (6.4%) cases were hospitalised. Measles in twice-vaccinated cases led less often to complications and/or hospitalisation than measles in unvaccinated cases (0% and 14.5%, respectively, aOR 0.1 (95% CI 0-0.89), P = 0.03). Of unvaccinated, once-vaccinated and twice-vaccinated cases, respectively, 194 (7.6%), seven (5.1%) and 0 (0%) were infectious. These differences were not statistically significant (P > 0.05).Our findings suggest a protective effect of vaccination on the occurrence of complications and/or hospitalisation as a result of measles and support the WHO recommendation of a two-dose MMR vaccination schedule.
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Affiliation(s)
- A.S.G. van Dam
- Department of infectious diseases, GGD Hart voor Brabant, ‘s-Hertogenbosch, The Netherlands
- National Institute for Public Health and the Environment (RIVM), Bilthoven, The Netherlands
- European Programme for Intervention Epidemiology Training (EPIET), European Centre for Disease Prevention and Control (ECDC), Stockholm, Sweden
| | - T. Woudenberg
- National Institute for Public Health and the Environment (RIVM), Bilthoven, The Netherlands
| | - H.E. de Melker
- National Institute for Public Health and the Environment (RIVM), Bilthoven, The Netherlands
| | - J. Wallinga
- National Institute for Public Health and the Environment (RIVM), Bilthoven, The Netherlands
- Leiden University Medical Center, Leiden, The Netherlands
| | - S.J.M. Hahné
- National Institute for Public Health and the Environment (RIVM), Bilthoven, The Netherlands
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van der Kwast RVCT, Woudenberg T, Quax PHA, Nossent AY. MicroRNA-411 and Its 5'-IsomiR Have Distinct Targets and Functions and Are Differentially Regulated in the Vasculature under Ischemia. Mol Ther 2019; 28:157-170. [PMID: 31636041 DOI: 10.1016/j.ymthe.2019.10.002] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Revised: 09/24/2019] [Accepted: 10/02/2019] [Indexed: 02/06/2023] Open
Abstract
MicroRNAs are posttranscriptional regulators of gene expression. As microRNAs can target many genes simultaneously, microRNAs can regulate complex multifactorial processes, including post-ischemic neovascularization, a major recovery pathway in cardiovascular disease. MicroRNAs select their target mRNAs via full complementary binding with their seed sequence, i.e., nucleotides 2-8 from the 5' end of a microRNA. The exact sequence of a mature microRNA, and thus of its 5' and 3' ends, is determined by two sequential cleavage steps of microRNA precursors, Drosha/DGCR8 and Dicer. When these cleavage steps result in nucleotide switches at the 5' end, forming a so-called 5'-isomiR, this results in a shift in the mature microRNA's seed sequence. The role of 5'-isomiRs in cardiovascular diseases is still unknown. Here, we characterize the expression and function of the 5'-isomiR of miR-411 (ISO-miR-411). ISO-miR-411 is abundantly expressed in human primary vascular cells. ISO-miR-411 has a different "targetome" from WT-miR-411, with only minor overlap. The ISO-miR-411/WT-miR-411 ratio is downregulated under acute ischemia, both in cells and a murine ischemia model, but is upregulated instead in chronically ischemic human blood vessels. ISO-miR-411 negatively influences vascular cell migration, whereas WT-miR-411 does not. Our data demonstrate that isomiR formation is a functional pathway that is actively regulated during ischemia.
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Affiliation(s)
- Reginald V C T van der Kwast
- Department of Surgery, Leiden University Medical Center, Leiden 2333ZA, the Netherlands; Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden 2333ZA, the Netherlands
| | - Tamar Woudenberg
- Department of Surgery, Leiden University Medical Center, Leiden 2333ZA, the Netherlands; Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden 2333ZA, the Netherlands
| | - Paul H A Quax
- Department of Surgery, Leiden University Medical Center, Leiden 2333ZA, the Netherlands; Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden 2333ZA, the Netherlands
| | - A Yaël Nossent
- Department of Surgery, Leiden University Medical Center, Leiden 2333ZA, the Netherlands; Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden 2333ZA, the Netherlands; Department of Laboratory Medicine, Medical University of Vienna, Vienna 1090, Austria; Department of Internal Medicine II, Medical University of Vienna, Vienna 1090, Austria.
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van der Maas NAT, Woudenberg T, Hahné SJM, de Melker HE. Tolerability of Early Measles-Mumps-Rubella Vaccination in Infants Aged 6-14 Months During a Measles Outbreak in The Netherlands in 2013-2014. J Infect Dis 2015; 213:1466-71. [PMID: 26690343 PMCID: PMC4813742 DOI: 10.1093/infdis/jiv756] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Accepted: 12/14/2015] [Indexed: 12/12/2022] Open
Abstract
Background. In 2013–2014, a measles outbreak spread through the Netherlands. To protect young infants, measles-mumps-rubella (MMR) vaccination was offered to those aged 6–14 months in municipalities with routine first-dose MMR vaccine coverage of <90%. We assessed the tolerability of this early administration of MMR vaccine. Methods. After study entry (n = 1866), parents of eligible infants (n = 10 097) completed a questionnaire (n = 1304). For infants who received an early MMR vaccine dose (n = 962), we asked for information about adverse events (AEs) associated with the dose. AE frequencies were compared between infants aged 6–8, 9–11, and 12–14 months. Using multivariable logistic regression, we assessed the association between the risk of AEs and age at early MMR vaccination. Results. The response rate was 13%. Parents of 59 infants (6.1%) and 350 infants (36.4%) who received early MMR vaccination reported local and systemic AEs, respectively. Parents of infants vaccinated at 6–8 months of age reported systemic AEs less frequently (32%) than parents of children vaccinated at 9–11 months (45%) and 12–14 months (43%) of age (P = <.001). For local AEs, there were no differences (5%, 7%, and 10%, respectively; P = .08). Compared with vaccination at 6 months, all older infants except those aged 14 months showed an increased risk for any AE and for systemic AEs starting 5–12 days after vaccination. Conclusions. Early MMR vaccination is well tolerated, with the lowest AE frequencies found in infants aged 6–8 months. It is a safe intervention for protecting young infants against measles.
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Affiliation(s)
- Nicoline A T van der Maas
- Center for Infectious Disease Control, National Institute for Public Health and the Environment, Bilthoven, The Netherlands
| | - T Woudenberg
- Center for Infectious Disease Control, National Institute for Public Health and the Environment, Bilthoven, The Netherlands
| | - S J M Hahné
- Center for Infectious Disease Control, National Institute for Public Health and the Environment, Bilthoven, The Netherlands
| | - H E de Melker
- Center for Infectious Disease Control, National Institute for Public Health and the Environment, Bilthoven, The Netherlands
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DiCesare J, Grossman B, Katz E, Picozza E, Ragusa R, Woudenberg T. A high-sensitivity electrochemiluminescence-based detection system for automated PCR product quantitation. Biotechniques 1993; 15:152-7. [PMID: 8363832] [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: 01/30/2023] Open
Abstract
A high-sensitivity nonisotopic system has been developed for post-PCR product detection. The probe-based detection system exploits a chemiluminescent reaction that takes place on the electrode surface in an electrochemical cell. The detection system incorporates a biotin-streptavidin capture reaction onto a solid support that permits fast post-PCR product detection at the attomole level. The system precision is within 5% relative standard deviation over a linear dynamic range of greater than three orders of magnitude. In this paper, the principles and features of the electrochemiluminescent-based detection system, together with its application to PCR product quantitation, are described in detail.
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Affiliation(s)
- J DiCesare
- Perkin-Elmer Corporation, Wilton, CT 06897
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Haff L, Atwood JG, DiCesare J, Katz E, Picozza E, Williams JF, Woudenberg T. A high-performance system for automation of the polymerase chain reaction. Biotechniques 1991; 10:102-3, 106-12. [PMID: 2003915] [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: 12/29/2022] Open
Abstract
A high-performance PCR system has been developed which reduces the time required for PCR, increases the throughput, reduces reagent consumption and ensures reproducibility of amplification. Integration of sophisticated temperature control with optimally designed vessels has resulted in an amplification system which produces unique benefits. These include rapid amplification, the elimination of the need for oil, even for small volumes, and a microplate format which provides liquid handling automation benefits.
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Affiliation(s)
- L Haff
- Perkin-Elmer Corporation, Norwalk, CT 06859-0251
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