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Van den Bulcke L, De Backer A, Ampe B, Maes S, Wittoeck J, Waegeman W, Hostens K, Derycke S. Towards harmonization of DNA metabarcoding for monitoring marine macrobenthos: the effect of technical replicates and pooled DNA extractions on species detection. MBMG 2021. [DOI: 10.3897/mbmg.5.71107] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
DNA-based monitoring methods are potentially faster and cheaper compared to traditional morphological benthic identification. DNA metabarcoding involves various methodological choices which can introduce bias leading to a different outcome in biodiversity patterns. Therefore, it is important to harmonize DNA metabarcoding protocols to allow comparison across studies and this requires a good understanding of the effect of methodological choices on diversity estimates. This study investigated the impact of DNA and PCR replicates on the detection of macrobenthos species in locations with high, medium and low diversity. Our results show that two to three DNA replicates were needed in locations with a high and medium diversity to detect at least 80% of the species found in the six DNA replicates, while three to four replicates were needed in the location with low diversity. In contrast to general belief, larger body size or higher abundance of the species in a sample did not increase its detection prevalence among DNA replicates. However, rare species were less consistently detected across all DNA replicates of the location with high diversity compared to locations with less diversity. Our results further show that pooling of DNA replicates did not significantly alter diversity patterns, although a small number of rare species was lost. Finally, our results confirm high variation in species detection between PCR replicates, especially for the detection of rare species. These results contribute to create reliable, time and cost efficient metabarcoding protocols for the characterization of macrobenthos.
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Vanreusel I, Maes S, De Wolf D, Van Berendoncks A. Percutaneous closure of a secundum atrial septum defect performed under hypnosis: a case report. Acta Cardiol 2021; 76:1078-1082. [PMID: 32964783 DOI: 10.1080/00015385.2020.1822491] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Atrial septal defects (ASDs) are the third most common type of congenital heart diseases with ostium secundum defects (ASDsII) being responsible for approximately 75% of these defects. The treatment consists of either a transcatheter closure or a surgical intervention. The transcatheter approach offers a less invasive alternative for patients who fulfill anatomical and size criteria and is therefore increasingly used as the preferred primary intervention. As general anaesthesia is sometimes contra-indicated for some patients needing ASD or PFO closure and intracardiac echocardiography (ICE) is not always readily available, alternative "supportive" techniques as hypnosis could be of interest. In our case, a relative contra-indication for general anaesthesia was pronounced due to the severely impaired pulmonary function caused by severe deformative torsional scoliosis. Over the years several reviews have been published on hypnotic analgesia used together with usual care suggesting that hypnotic analgesia is a promising non-pharmacologic adjunct treatment for ameliorating pain and surgical distress. Also, various cardiological procedures under hypnosis have already been described in literature, but this is the first time that percutaneous ASD closure under virtual reality (VR) hypnosis is mentioned in literature.
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Affiliation(s)
| | - S. Maes
- Department of Anesthesiology, University Hospital of Antwerp, Edegem, Belgium
| | - D. De Wolf
- Department of Pediatric Cardiology, University Hospital of Ghent, Ghent, Belgium
| | - A. Van Berendoncks
- University of Antwerp, Antwerp, Belgium
- Department of Cardiology, University Hospital of Antwerp, Edegem, Belgium
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De Schrijver L, Sermeus L, Maes S, Camerlynck H, Morrison S. Regional anesthesia combined with virtual reality hypnosis for extended orthopedic surgery: two case reports. Acta Anaest Belg 2020. [DOI: 10.56126/71.3.8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Background : Virtual reality hypnosis is a combination of visual immersion in a virtual reality environment and clinical hypnosis. It can be used in addition to conventional techniques, for sedation and pain management during wound care. Patients undergoing painful and long-lasting procedures under regional anesthesia could also benefit, from this technique alleviating the need for sedative-hypnotic medication.
Case presentation : Two patients with relative contra- indications for general anesthesia underwent lengthy orthopedic surgery of the upper limbs under regional anesthesia with additional virtual reality hypnosis. Written informed consent was obtained from both patients before surgery. A 69-year-old man, with a previous medical history of severe symptomatic aortic valve stenosis (ѳ 0.69cm2, max/mean gradient of 91/58mmHg) sustained a proximal humerus fracture-dislocation and was scheduled to undergo shoulder hemi-arthroplasty. Anesthesia was provided with ultrasound-guided continuous interscalene block at the C5-C6 level (11mL levobupivacaine 0.5%) combined with a single-shot superficial cervical plexus block (6mL levobupivacaine 0.5%). The second case was a 56-year-old man suffering from rheumatoid arthritis with severe restrictive lung function due to interstitial lung disease and bilateral bronchiectasis. He received a unilateral elbow prosthesis.
Continuous infra-clavicular brachial plexus block, per- formed under ultrasound guidance was provided (20 mL mepivacaine 1.5%). Both patients required prolonged immobilization on the operating table. We used virtual reality hypnosis to induce sedation and improve comfort without using medication. This was provided by headphones and head-mounted goggles, showing computer generated images of underwater scenes (Aqua module, Oncomfort ™). Both surgeries were uneventful during which time cardiorespiratory stability was maintained. Patients were comfortable during and satisfied after surgery. No sedative drugs were given before nor during the procedures.
Conclusion : Non-pharmacological sedation can be achieved with virtual reality hypnosis. When com- bined with regional anesthesia, this technique provides satisfactory sedation when pharmacological methods may be hazardous.
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Maes S, Caliari D. Tonsillar Lymphangiomatous Polyps: A Clinicopathological Description of 14 Canine Cases and One Feline Case. J Comp Pathol 2020. [DOI: 10.1016/j.jcpa.2019.10.090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Josue AM, Coll K, Eguia S, Kopecky C, Trejo E, Maes S, Reams D, Saquiton L, Thomas R, Climaco M. Management of Patients with Insulin Pumps in the Perioperative Setting. J Perianesth Nurs 2018. [DOI: 10.1016/j.jopan.2018.06.015] [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: 11/24/2022]
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De Gucht V, Cromm K, Vogt A, Julius U, Hohenstein B, Spitthöver RM, Ramlow W, Schettler VJJ, Maes S. Treatment-related and health-related quality of life in lipoprotein apheresis patients. J Clin Lipidol 2018; 12:1225-1233. [PMID: 29921556 DOI: 10.1016/j.jacl.2018.05.008] [Citation(s) in RCA: 10] [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] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Revised: 03/27/2018] [Accepted: 05/10/2018] [Indexed: 11/17/2022]
Abstract
BACKGROUND There is evidence for beneficial effects of lipoprotein apheresis (LA) in terms of reduction of cardiovascular events and interventions, but quality of life (QOL) in LA patients has only been explored in small samples. OBJECTIVE In this study, both LA- or treatment-related and health-related QOL (HRQOL) were assessed in 206 LA patients. METHODS Mental and physical HRQOL of the LA patients was assessed by means of the SF-12 as well as the EQ-5D. Physical complaints were assessed by the Patient Health Questionnaire-15 and LA- or treatment-related QOL by the Apheresis Quality of Life Form, developed for this study. RESULTS Comparison with general population norms showed that LA patients scored significantly lower on HRQOL and significantly higher on physical complaints. A higher perceived impact of the treatment proved to have a significant negative association with HRQOL and a positive one with physical complaints. CONCLUSION Previous studies reported higher levels of QOL in LA patients. This study showed that treatment-related QOL contributes to HRQOL and physical complaints in LA patients. While many patients do not experience LA as a real burden and report positive effects of the treatment, there is also an important group of patients for whom this is not the case. Although the impact on QOL of LA patients does most probably not outweigh the cardiovascular benefits of the treatment, it is important to screen treatment-related QOL in LA patients to optimize care in a personalized way. Future research is needed to compare QOL in LA with non-LA patients with similar medical conditions.
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Affiliation(s)
- V De Gucht
- Department of Health and Medical Psychology, Leiden University, Leiden, The Netherlands.
| | - K Cromm
- Fresenius Medical Care, Bad Homburg, Germany
| | - A Vogt
- Stoffwechselambulanz, Medizinische Klinik und Poliklinik IV, Klinikum der Universität München, München, Germany
| | - U Julius
- Lipidology, Department of Internal Medicine III, University hospital at the Technische Universität Dresden, Dresden, Germany
| | - B Hohenstein
- Lipidology, Department of Internal Medicine III, University hospital at the Technische Universität Dresden, Dresden, Germany
| | | | - W Ramlow
- Apheresis Center Rostock (ACR), Rostock, Germany
| | | | - S Maes
- Department of Health and Medical Psychology, Leiden University, Leiden, The Netherlands
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De Tender C, Devriese LI, Haegeman A, Maes S, Vangeyte J, Cattrijsse A, Dawyndt P, Ruttink T. Temporal Dynamics of Bacterial and Fungal Colonization on Plastic Debris in the North Sea. Environ Sci Technol 2017; 51:7350-7360. [PMID: 28562015 DOI: 10.1021/acs.est.7b00697/suppl_file/es7b00697_si_001.pdf] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Despite growing evidence that biofilm formation on plastic debris in the marine environment may be essential for its biodegradation, the underlying processes have yet to be fully understood. Thus, far, bacterial biofilm formation had only been studied after short-term exposure or on floating plastic, yet a prominent share of plastic litter accumulates on the seafloor. In this study, we explored the taxonomic composition of bacterial and fungal communities on polyethylene plastic sheets and dolly ropes during long-term exposure on the seafloor, both at a harbor and an offshore location in the Belgian part of the North Sea. We reconstructed the sequence of events during biofilm formation on plastic in the harbor environment and identified a core bacteriome and subsets of bacterial indicator species for early, intermediate, and late stages of biofilm formation. Additionally, by implementing ITS2 metabarcoding on plastic debris, we identified and characterized for the first time fungal genera on plastic debris. Surprisingly, none of the plastics exposed to offshore conditions displayed the typical signature of a late stage biofilm, suggesting that biofilm formation is severely hampered in the natural environment where most plastic debris accumulates.
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Affiliation(s)
- Caroline De Tender
- Institute of Agricultural, Fisheries and Food Research (ILVO) , Burgemeester Van Gansberghelaan 92, 9820 Merelbeke, Belgium
- Ghent University , Department of Applied Mathematics, Computer Sciences and Statistics, Krijgslaan 281 S9, 9000 Ghent, Belgium
| | - Lisa I Devriese
- Institute of Agricultural, Fisheries and Food Research (ILVO) , Burgemeester Van Gansberghelaan 92, 9820 Merelbeke, Belgium
- Department of Environment and Health, Vrije Universiteit Amsterdam , De Boelelaan 1087, 1081 HV Amsterdam, The Netherlands
| | - Annelies Haegeman
- Institute of Agricultural, Fisheries and Food Research (ILVO) , Burgemeester Van Gansberghelaan 92, 9820 Merelbeke, Belgium
| | - Sara Maes
- Institute of Agricultural, Fisheries and Food Research (ILVO) , Burgemeester Van Gansberghelaan 92, 9820 Merelbeke, Belgium
| | - Jürgen Vangeyte
- Institute of Agricultural, Fisheries and Food Research (ILVO) , Burgemeester Van Gansberghelaan 92, 9820 Merelbeke, Belgium
| | - André Cattrijsse
- Flanders Marine Institute , InnovOcean site, Wandelaarkaai 7, 8400 Oostende, Belgium
| | - Peter Dawyndt
- Ghent University , Department of Applied Mathematics, Computer Sciences and Statistics, Krijgslaan 281 S9, 9000 Ghent, Belgium
| | - Tom Ruttink
- Institute of Agricultural, Fisheries and Food Research (ILVO) , Burgemeester Van Gansberghelaan 92, 9820 Merelbeke, Belgium
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De Tender C, Devriese LI, Haegeman A, Maes S, Vangeyte J, Cattrijsse A, Dawyndt P, Ruttink T. Temporal Dynamics of Bacterial and Fungal Colonization on Plastic Debris in the North Sea. Environ Sci Technol 2017; 51:7350-7360. [PMID: 28562015 DOI: 10.1021/acs.est.7b00697] [Citation(s) in RCA: 159] [Impact Index Per Article: 22.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Despite growing evidence that biofilm formation on plastic debris in the marine environment may be essential for its biodegradation, the underlying processes have yet to be fully understood. Thus, far, bacterial biofilm formation had only been studied after short-term exposure or on floating plastic, yet a prominent share of plastic litter accumulates on the seafloor. In this study, we explored the taxonomic composition of bacterial and fungal communities on polyethylene plastic sheets and dolly ropes during long-term exposure on the seafloor, both at a harbor and an offshore location in the Belgian part of the North Sea. We reconstructed the sequence of events during biofilm formation on plastic in the harbor environment and identified a core bacteriome and subsets of bacterial indicator species for early, intermediate, and late stages of biofilm formation. Additionally, by implementing ITS2 metabarcoding on plastic debris, we identified and characterized for the first time fungal genera on plastic debris. Surprisingly, none of the plastics exposed to offshore conditions displayed the typical signature of a late stage biofilm, suggesting that biofilm formation is severely hampered in the natural environment where most plastic debris accumulates.
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Affiliation(s)
- Caroline De Tender
- Institute of Agricultural, Fisheries and Food Research (ILVO) , Burgemeester Van Gansberghelaan 92, 9820 Merelbeke, Belgium
- Ghent University , Department of Applied Mathematics, Computer Sciences and Statistics, Krijgslaan 281 S9, 9000 Ghent, Belgium
| | - Lisa I Devriese
- Institute of Agricultural, Fisheries and Food Research (ILVO) , Burgemeester Van Gansberghelaan 92, 9820 Merelbeke, Belgium
- Department of Environment and Health, Vrije Universiteit Amsterdam , De Boelelaan 1087, 1081 HV Amsterdam, The Netherlands
| | - Annelies Haegeman
- Institute of Agricultural, Fisheries and Food Research (ILVO) , Burgemeester Van Gansberghelaan 92, 9820 Merelbeke, Belgium
| | - Sara Maes
- Institute of Agricultural, Fisheries and Food Research (ILVO) , Burgemeester Van Gansberghelaan 92, 9820 Merelbeke, Belgium
| | - Jürgen Vangeyte
- Institute of Agricultural, Fisheries and Food Research (ILVO) , Burgemeester Van Gansberghelaan 92, 9820 Merelbeke, Belgium
| | - André Cattrijsse
- Flanders Marine Institute , InnovOcean site, Wandelaarkaai 7, 8400 Oostende, Belgium
| | - Peter Dawyndt
- Ghent University , Department of Applied Mathematics, Computer Sciences and Statistics, Krijgslaan 281 S9, 9000 Ghent, Belgium
| | - Tom Ruttink
- Institute of Agricultural, Fisheries and Food Research (ILVO) , Burgemeester Van Gansberghelaan 92, 9820 Merelbeke, Belgium
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De Gucht V, Garcia FK, den Engelsman M, Maes S. Do changes in illness perceptions, physical activity, and behavioural regulation influence fatigue severity and health-related outcomes in CFS patients? J Psychosom Res 2017; 95:55-61. [PMID: 28314549 DOI: 10.1016/j.jpsychores.2017.02.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [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: 06/21/2016] [Revised: 02/15/2017] [Accepted: 02/16/2017] [Indexed: 01/23/2023]
Abstract
OBJECTIVE Examine to what extent changes in cognitions and changes in physical activity and behavioural regulation patterns influence fatigue severity, physical symptoms, and physical and psychological functioning of patients suffering from Chronic Fatigue Syndrome (CFS) at follow-up. METHODS The present study is an observational longitudinal study with a 12-month follow-up. A total of 144 CFS patients participated both at baseline and at follow-up. Four separate hierarchical regression analyses were conducted with fatigue, physical symptoms, physical functioning and psychological functioning at follow-up as the dependent variables, and (changes in) illness perceptions and behavioural regulation patterns (all-or-nothing and limiting behaviour) as the independent variables. Data were collected making use of self-report questionnaires. RESULTS Increased Consequence and Identity beliefs over time, as well as increases in all-or-nothing behaviour predicted higher fatigue severity at follow-up. Both number and severity of physical symptoms and psychological functioning at follow-up were only determined by changes in illness perceptions, with increased Consequence beliefs influencing both outcomes, and increased Timeline beliefs only determining physical symptoms. Physical functioning at follow-up was predicted by changes in illness perceptions as well as increased levels of both all-or-nothing and limiting behaviour. CONCLUSION The findings point at a differential pattern of associations between changes in illness perceptions and behaviour regulation patterns on the one hand, and patient outcomes on the other hand. Whereas illness perceptions significantly contribute to each of the outcomes, behaviour regulation patterns contribute only to fatigue severity and physical functioning.
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Affiliation(s)
- V De Gucht
- Leiden University, Institute of Psychology, Health, Medical and Neuropsychology Unit, The Netherlands.
| | - F K Garcia
- Leiden University, Institute of Psychology, Health, Medical and Neuropsychology Unit, The Netherlands
| | - M den Engelsman
- Leiden University, Institute of Psychology, Health, Medical and Neuropsychology Unit, The Netherlands
| | - S Maes
- Leiden University, Institute of Psychology, Health, Medical and Neuropsychology Unit, The Netherlands
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Marques MM, de Gucht V, Leal I, Maes S. Efficacy of a randomized controlled self-regulation based physical activity intervention for chronic fatigue: Mediation effects of physical activity progress and self-regulation skills. J Psychosom Res 2017; 94:24-31. [PMID: 28183399 DOI: 10.1016/j.jpsychores.2016.12.012] [Citation(s) in RCA: 7] [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] [Received: 02/13/2016] [Revised: 12/23/2016] [Accepted: 12/23/2016] [Indexed: 01/06/2023]
Abstract
OBJECTIVE Examine the medium-term effects of a brief physical activity (PA) self-regulation (SR) based intervention (4-STEPS program) for chronic fatigue, and explore the mediating effects of PA related variables and SR skills. METHODS A two-arm randomized controlled trial (Usual Care vs 4-STEPS) was carried out. The 4-STEPS program consisted of Motivational Interviewing and SR-skills training. Fatigue severity (primary outcome) and impact, PA, health-related quality of life (HrQoL), and somatic and psychological distress were assessed at baseline, post-treatment (12weeks) and 12months follow-up. RESULTS Ninety-one patients (45 intervention and 46 controls) were included. At follow-up, there were significant treatment effects on fatigue severity (g=0.72) and fatigue impact, leisure-time PA, and physical and psychological HrQoL. No significant effects were found for number of daily steps and somatic and psychological distress. Fatigue severity at follow-up was partially mediated by post-treatment progress on a personal PA goal (effect ratio=18%). CONCLUSION Results suggest that a brief intervention, focusing on the formulation and pursuit of personal PA goals and the use of SR skills, produces sustained benefits for fatigue severity. Despite these promising results, dropout was high and the intervention was not beneficial for all secondary outcomes.
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Affiliation(s)
- M M Marques
- Interdisciplinary Centre for the Study of Human Performance (CIPER), Faculty of Human Kinetics, University of Lisbon, Portugal; Leiden University, Department of Health, Medical and Neuropsychology, PO Box 9555, 2300 RB Leiden, The Netherlands.
| | - V de Gucht
- Leiden University, Department of Health, Medical and Neuropsychology, PO Box 9555, 2300 RB Leiden, The Netherlands
| | - I Leal
- ISPA- University Institute, Rua Jardim do Tabaco, 34, 1149-041 Lisboa, Portugal
| | - S Maes
- Leiden University, Department of Health, Medical and Neuropsychology, PO Box 9555, 2300 RB Leiden, The Netherlands
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Chechenova MB, Maes S, Oas ST, Nelson C, Kiani KG, Bryantsev AL, Cripps RM. Functional redundancy and nonredundancy between two Troponin C isoforms in Drosophila adult muscles. Mol Biol Cell 2017; 28:760-770. [PMID: 28077621 PMCID: PMC5349783 DOI: 10.1091/mbc.e16-07-0498] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [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: 07/08/2016] [Revised: 01/05/2017] [Accepted: 01/06/2017] [Indexed: 11/18/2022] Open
Abstract
Knockout of either of two Drosophila Troponin C genes that are expressed in either the flight muscle or the jump muscle resulted in expansion of transcription of its paralogue into the affected muscle. Although either isoform can support normal jumping, only the flight isoform can support flight. We investigated the functional overlap of two muscle Troponin C (TpnC) genes that are expressed in the adult fruit fly, Drosophila melanogaster: TpnC4 is predominantly expressed in the indirect flight muscles (IFMs), whereas TpnC41C is the main isoform in the tergal depressor of the trochanter muscle (TDT; jump muscle). Using CRISPR/Cas9, we created a transgenic line with a homozygous deletion of TpnC41C and compared its phenotype to a line lacking functional TpnC4. We found that the removal of either of these genes leads to expression of the other isoform in both muscle types. The switching between isoforms occurs at the transcriptional level and involves minimal enhancers located upstream of the transcription start points of each gene. Functionally, the two TpnC isoforms were not equal. Although ectopic TpnC4 in TDT muscles was able to maintain jumping ability, TpnC41C in IFMs could not effectively support flying. Simultaneous functional disruption of both TpnC genes resulted in jump-defective and flightless phenotypes of the survivors, as well as abnormal sarcomere organization. These results indicated that TpnC is required for myofibril assembly, and that there is functional specialization among TpnC isoforms in Drosophila.
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Affiliation(s)
- Maria B Chechenova
- Department of Biology, University of New Mexico, Albuquerque, NM 87131.,Department of Molecular and Cellular Biology, Kennesaw State University, Kennesaw, GA 30144
| | - Sara Maes
- Department of Biology, University of New Mexico, Albuquerque, NM 87131
| | - Sandy T Oas
- Department of Biology, University of New Mexico, Albuquerque, NM 87131
| | - Cloyce Nelson
- Department of Biology, University of New Mexico, Albuquerque, NM 87131
| | - Kaveh G Kiani
- Department of Molecular and Cellular Biology, Kennesaw State University, Kennesaw, GA 30144
| | - Anton L Bryantsev
- Department of Biology, University of New Mexico, Albuquerque, NM 87131.,Department of Molecular and Cellular Biology, Kennesaw State University, Kennesaw, GA 30144
| | - Richard M Cripps
- Department of Biology, University of New Mexico, Albuquerque, NM 87131
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Maes S, Laubach M, Poelaert J. Randomised controlled trial of spinal anaesthesia with bupivacaine or 2-chloroprocaine during caesarean section. Acta Anaesthesiol Scand 2016; 60:642-9. [PMID: 26608876 DOI: 10.1111/aas.12665] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2014] [Revised: 05/31/2015] [Accepted: 11/03/2015] [Indexed: 11/30/2022]
Abstract
BACKGROUND Neuraxial anaesthesia is the desired method for Caesarean section. Bupivacaine is a well-known local anaesthetic. It has a long duration of action and can cause unpredictable levels of anaesthesia with subsequent prolonged discharge time. 2-Chloroprocaine has a rapid onset of action, producing an excellent sensory and motor block and has a rapid hydrolysis in the bloodstream by pseudocholinesterase. We compared bupivacaine and 2-chloroprocaine for spinal anaesthesia during Caesarean section. The primary endpoint was the earliest reversal sign of the motor block. METHODS Sixty ASAI/II patients, planned for elective singleton Caesarean section, were equally randomised to three groups. All patients received a combined spinal-epidural anaesthesia. The first group received 2-chloroprocaine (40 mg) without sufentanil, the second group received 2-chloroprocaine (40 mg) with sufentanil (1 μg) and the third group received hyperbaric bupivacaine (7.5 mg) with sufentanil (1 μg) as a spinal anaesthetic. Motor and sensory blockade were assessed at specific time points. RESULTS There was no difference between the three groups regarding the time to regression of the motor block. However, at 5 min post spinal injection, the level of sensory block was higher for both groups with 2-chloroprocaine, in comparison with the bupivacaine group. CONCLUSION 2-Chloroprocaine can be used for low risk Caesarean section in healthy parturients. There is no difference in time to motor block resolution compared to bupivacaine. Motor recovery seems more predictable for 2-chloroprocaine and may be beneficial for the breastfeeding initiation.
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Affiliation(s)
- S. Maes
- Department of Anaesthesiology and Perioperative Medicine; UZ Brussel; Brussels Belgium
| | - M. Laubach
- Department of Gynaecology; UZ Brussel; Brussels Belgium
| | - J. Poelaert
- Department of Anaesthesiology and Perioperative Medicine; UZ Brussel; Brussels Belgium
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Chechenova MB, Maes S, Cripps RM. Expression of the Troponin C at 41C Gene in Adult Drosophila Tubular Muscles Depends upon Both Positive and Negative Regulatory Inputs. PLoS One 2015; 10:e0144615. [PMID: 26641463 PMCID: PMC4671713 DOI: 10.1371/journal.pone.0144615] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Accepted: 11/20/2015] [Indexed: 12/05/2022] Open
Abstract
Most animals express multiple isoforms of structural muscle proteins to produce tissues with different physiological properties. In Drosophila, the adult muscles include tubular-type muscles and the fibrillar indirect flight muscles. Regulatory processes specifying tubular muscle fate remain incompletely understood, therefore we chose to analyze the transcriptional regulation of TpnC41C, a Troponin C gene expressed in the tubular jump muscles, but not in the fibrillar flight muscles. We identified a 300-bp promoter fragment of TpnC41C sufficient for the fiber-specific reporter expression. Through an analysis of this regulatory element, we identified two sites necessary for the activation of the enhancer. Mutations in each of these sites resulted in 70% reduction of enhancer activity. One site was characterized as a binding site for Myocyte Enhancer Factor-2. In addition, we identified a repressive element that prevents activation of the enhancer in other muscle fiber types. Mutation of this site increased jump muscle-specific expression of the reporter, but more importantly reporter expression expanded into the indirect flight muscles. Our findings demonstrate that expression of the TpnC41C gene in jump muscles requires integration of multiple positive and negative transcriptional inputs. Identification of the transcriptional regulators binding the cis-elements that we identified will reveal the regulatory pathways controlling muscle fiber differentiation.
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Affiliation(s)
- Maria B Chechenova
- Department of Biology, University of New Mexico, Albuquerque, NM, 87131, United States of America
| | - Sara Maes
- Department of Biology, University of New Mexico, Albuquerque, NM, 87131, United States of America
| | - Richard M Cripps
- Department of Biology, University of New Mexico, Albuquerque, NM, 87131, United States of America
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De Tender CA, Devriese LI, Haegeman A, Maes S, Ruttink T, Dawyndt P. Bacterial Community Profiling of Plastic Litter in the Belgian Part of the North Sea. Environ Sci Technol 2015; 49:9629-9638. [PMID: 26204244 DOI: 10.1021/acs.est.5b01093] [Citation(s) in RCA: 215] [Impact Index Per Article: 23.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Bacterial colonization of marine plastic litter (MPL) is known for over four decades. Still, only a few studies on the plastic colonization process and its influencing factors are reported. In this study, seafloor MPL was sampled at different locations across the Belgian part of the North Sea to study bacterial community structure using 16S metabarcoding. These marine plastic bacterial communities were compared with those of sediment and seawater, and resin pellets sampled on the beach, to investigate the origin and uniqueness of plastic bacterial communities. Plastics display great variation of bacterial community composition, while each showed significant differences from those of sediment and seawater, indicating that plastics represent a distinct environmental niche. Various environmental factors correlate with the diversity of MPL bacterial composition across plastics. In addition, intrinsic plastic-related factors such as pigment content may contribute to the differences in bacterial colonization. Furthermore, the differential abundance of known primary and secondary colonizers across the various plastics may indicate different stages of bacterial colonization, and may confound comparisons of free-floating plastics. Our studies provide insights in the factors that shape plastic bacterial colonization and shed light on the possible role of plastic as transport vehicle for bacteria through the aquatic environment.
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Affiliation(s)
- Caroline A De Tender
- †Institute of Agricultural and Fisheries Research (ILVO), Animal Sciences Unit - Aquatic Environment and Quality, Ankerstraat 1, 8400 Ostend, Belgium
- ‡Institute of Agricultural and Fisheries Research (ILVO), Plant Sciences Unit - Crop Protection, Burgemeester Van Gansberghelaan 96, 9820 Merelbeke, Belgium
- §Department of Applied Mathematics, Computer Sciences and Statistics, Ghent University, Krijgslaan 281 S9, 9000 Ghent, Belgium
| | - Lisa I Devriese
- †Institute of Agricultural and Fisheries Research (ILVO), Animal Sciences Unit - Aquatic Environment and Quality, Ankerstraat 1, 8400 Ostend, Belgium
| | - Annelies Haegeman
- ‡Institute of Agricultural and Fisheries Research (ILVO), Plant Sciences Unit - Crop Protection, Burgemeester Van Gansberghelaan 96, 9820 Merelbeke, Belgium
- ∥Institute of Agricultural and Fisheries Research (ILVO), Plant Sciences Unit - Growth and Development, Caritasstraat 21, 9090 Melle, Belgium
| | - Sara Maes
- †Institute of Agricultural and Fisheries Research (ILVO), Animal Sciences Unit - Aquatic Environment and Quality, Ankerstraat 1, 8400 Ostend, Belgium
| | - Tom Ruttink
- ∥Institute of Agricultural and Fisheries Research (ILVO), Plant Sciences Unit - Growth and Development, Caritasstraat 21, 9090 Melle, Belgium
| | - Peter Dawyndt
- §Department of Applied Mathematics, Computer Sciences and Statistics, Ghent University, Krijgslaan 281 S9, 9000 Ghent, Belgium
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Marques M, De Gucht V, Gouveia M, Leal I, Maes S. Differential effects of behavioral interventions with a graded physical activity component in patients suffering from Chronic Fatigue (Syndrome): An updated systematic review and meta-analysis. Clin Psychol Rev 2015; 40:123-37. [DOI: 10.1016/j.cpr.2015.05.009] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2014] [Revised: 01/21/2015] [Accepted: 05/13/2015] [Indexed: 01/17/2023]
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16
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De Cuyper E, De Gucht V, Maes S, Van Camp Y, Elseviers M, De Clerck L. SAT0644-HPR Determinants of Methotrexate Adherence in Rheumatoid Arthritis Patients. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.2033] [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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17
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Marques M, De Gucht V, Leal I, Maes S. Effects of a Self-regulation Based Physical Activity Program (The “4-STEPS”) for Unexplained Chronic Fatigue: a Randomized Controlled Trial. Int J Behav Med 2014; 22:187-96. [DOI: 10.1007/s12529-014-9432-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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18
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Zhiponova MK, Vanhoutte I, Boudolf V, Betti C, Dhondt S, Coppens F, Mylle E, Maes S, González-García MP, Caño-Delgado AI, Inzé D, Beemster GTS, De Veylder L, Russinova E. Brassinosteroid production and signaling differentially control cell division and expansion in the leaf. New Phytol 2013; 197:490-502. [PMID: 23253334 DOI: 10.1111/nph.12036] [Citation(s) in RCA: 95] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2012] [Accepted: 10/07/2012] [Indexed: 05/03/2023]
Abstract
Brassinosteroid (BR) hormones control plant growth through acting on both cell expansion and division. Here, we examined the role of BRs in leaf growth using the Arabidopsis BR-deficient mutant constitutive photomorphogenesis and dwarfism (cpd). We show that the reduced size of cpd leaf blades is a result of a decrease in cell size and number, as well as in venation length and complexity. Kinematic growth analysis and tissue-specific marker gene expression revealed that the leaf phenotype of cpd is associated with a prolonged cell division phase and delayed differentiation. cpd-leaf-rescue experiments and leaf growth analysis of BR biosynthesis and signaling gain-of-function mutants showed that BR production and BR receptor-dependent signaling differentially control the balance between cell division and expansion in the leaf. Investigation of cell cycle markers in leaves of cpd revealed the accumulation of mitotic proteins independent of transcription. This correlated with an increase in cyclin-dependent kinase activity, suggesting a role for BRs in control of mitosis.
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Affiliation(s)
- Miroslava K Zhiponova
- Department of Plant Systems Biology, VIB, B-9052, Ghent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052, Ghent, Belgium
| | - Isabelle Vanhoutte
- Department of Plant Systems Biology, VIB, B-9052, Ghent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052, Ghent, Belgium
| | - Véronique Boudolf
- Department of Plant Systems Biology, VIB, B-9052, Ghent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052, Ghent, Belgium
| | - Camilla Betti
- Department of Plant Systems Biology, VIB, B-9052, Ghent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052, Ghent, Belgium
| | - Stijn Dhondt
- Department of Plant Systems Biology, VIB, B-9052, Ghent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052, Ghent, Belgium
| | - Frederik Coppens
- Department of Plant Systems Biology, VIB, B-9052, Ghent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052, Ghent, Belgium
| | - Evelien Mylle
- Department of Plant Systems Biology, VIB, B-9052, Ghent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052, Ghent, Belgium
| | - Sara Maes
- Department of Plant Systems Biology, VIB, B-9052, Ghent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052, Ghent, Belgium
| | - Mary-Paz González-García
- Molecular Genetics Department, Centre for Research in Agricultural Genomics CSIC-IRTA-UAB, 08013, Barcelona, Spain
| | - Ana I Caño-Delgado
- Molecular Genetics Department, Centre for Research in Agricultural Genomics CSIC-IRTA-UAB, 08013, Barcelona, Spain
| | - Dirk Inzé
- Department of Plant Systems Biology, VIB, B-9052, Ghent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052, Ghent, Belgium
| | | | - Lieven De Veylder
- Department of Plant Systems Biology, VIB, B-9052, Ghent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052, Ghent, Belgium
| | - Eugenia Russinova
- Department of Plant Systems Biology, VIB, B-9052, Ghent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052, Ghent, Belgium
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Cornelis I, Chiers K, Maes S, Kramer M, Ducatelle R, De Decker S, Van Ham L. Claudin-1 and Glucose Transporter 1 Immunolabelling in a Canine Intraneural Perineurioma. J Comp Pathol 2012; 147:186-90. [DOI: 10.1016/j.jcpa.2011.12.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2010] [Revised: 09/22/2011] [Accepted: 12/02/2011] [Indexed: 10/14/2022]
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Vanhaesebrouck AE, Maes S, Van Soens I, Baeumlin Y, Saey V, Van Ham LM. Bilateral obturator neuropathy caused by an intrapelvic fibrosarcoma with myofibroblastic features in a dog. J Small Anim Pract 2012; 53:423-7. [PMID: 22691019 DOI: 10.1111/j.1748-5827.2012.01225.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
A nine-year-old female Rottweiler presented with a 6-week history of progressive impairment of hindlimb adduction. Clinical examination showed abduction of both hind legs when walking on a smooth surface, pain at the medial surface of the left thigh, and an intrarectal palpable mass at the pelvic floor. Electromyography demonstrated fibrillation potentials in the adductor muscles on both sides. Pelvic radiographs showed severe osteolysis of the ischium. Gross post-mortem examination following euthanasia disclosed a large retroperitoneal mass, invading the obturator foramina and compressing both obturator nerves. Histopathological examination revealed a high-grade anaplastic sarcoma. Immunohistochemically, the tumour cells labelled positively for vimentin and alpha-smooth muscle actin, hence the tumour was considered a "myofibroblastic fibrosarcoma". This unique case report describes a novel cause of obturator neuropathy in veterinary medicine. To date, clinical descriptions of obturator nerve lesions have been limited to pelvic fractures in small animals and following difficult labour in large animals.
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Affiliation(s)
- A E Vanhaesebrouck
- Department of Small Animal Medicine and Clinical Biology, Faculty of Veterinary Medicine, Ghent University, 133 Salisburylaan, Merelbeke, Belgium
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Tavernier P, Baert K, Van de Bildt M, Kuiken T, Cay A, Maes S, Roels S, Gouwy J, Van Den Berge K. A distemper outbreak in beech martens (Martes foina) in Flanders. VLAAMS DIERGEN TIJDS 2012. [DOI: 10.21825/vdt.v81i2.18362] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
An outbreak of distemper was observed in beech martens (Martes foina) in the eastern part of Flanders (Belgium) for the first time. The clinical and pathological findings were consistent with other outbreaks described in mustelids in Europe. Using reverse transcriptase polymerase chain reaction, morbillivirus RNA was detected in an organ homogenate inoculated on Vero.dogSLAM cells. The virus was sequenced and was identified as a canine distemper virus (CDV) strain, hundred percent identical to an earlier isolate from a marten from Germany. After a period of nearly complete absence of beech martens in Flanders due to intensive prosecution, their population density has increased substantially in the last decennia. Although the exact mechanisms behind the observed population changes stay unclear, spread of CDV from central Europe following dispersion of beech martens is indicated by our findings. Further CDV spread could negatively impact on the highly threatened pine marten (Martes martes) and the decreasing polecat (Mustela putorius) populations in Flanders.
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Bonte J, Vangansbeke D, Maes S, Bonte M, Conlong D, Clercq PD. Moisture source and diet affect development and reproduction of Orius thripoborus and Orius naivashae, two predatory anthocorids from Southern Africa. J Insect Sci 2012; 12:1. [PMID: 22935002 PMCID: PMC3465932 DOI: 10.1673/031.012.0101] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2011] [Accepted: 08/01/2011] [Indexed: 05/28/2023]
Abstract
The effect of moisture source and diet on the development and reproduction of the pirate bugs, Orius thripoborus (Hesse) and Orius naivashae (Poppius) (Hemiptera: Anthocoridae) was examined in the laboratory. Both species had been collected in and around sugarcane fields in South Africa. Supplementing eggs of the flour moth Ephestia kuehniella (Zeller) (Lepidoptera: Pyralidae) with a green bean pod as a moisture source yielded better nymphal survival and faster development, as compared with free water encapsulated in Parafilm, suggesting that the predators may extract extra nutrients from the bean pod. The impact of two factitious foods and moist honey bee pollen on developmental and reproductive parameters of both predators was also investigated. The overall performance of both Orius species on E. kuehniella eggs and cysts of brine shrimp, Artemia franciscana Kellogg (Crustacea: Artemiidae) was better than on pollen. Nonetheless, a pollen diet alone allowed 66 and 78% of the nymphs of O. thripoborus and O. naivashae, respectively, to reach adulthood. Overall, developmental and reproductive performance of O. thripoborus on the tested diets was superior to that of O. naivashae. The implications of these findings for the mass production of these predators and their potential role in biological control programs in southern Africa are discussed.
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Affiliation(s)
- Jochem Bonte
- Laboratory of Agrozoology, Department of Crop Protection, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
| | - Dominiek Vangansbeke
- Laboratory of Agrozoology, Department of Crop Protection, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
| | - Sara Maes
- Laboratory of Agrozoology, Department of Crop Protection, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
| | - Maarten Bonte
- Laboratory of Agrozoology, Department of Crop Protection, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
| | - Des Conlong
- South African Sugarcane Research Institute, Private Bag X02, Mount Edgecombe, 4300, South Africa
- School of Biological and Conservation Sciences, University of KwaZulu-Natal, Private Bag X01, Scottsville, Pietermaritzburg, 3209. KwaZulu-Natal, South Africa
| | - Patrick De Clercq
- Laboratory of Agrozoology, Department of Crop Protection, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
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23
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Berckmans B, Vassileva V, Schmid SP, Maes S, Parizot B, Naramoto S, Magyar Z, Kamei CLA, Koncz C, Bögre L, Persiau G, De Jaeger G, Friml J, Simon R, Beeckman T, De Veylder L. Auxin-dependent cell cycle reactivation through transcriptional regulation of Arabidopsis E2Fa by lateral organ boundary proteins. Plant Cell 2011; 23:3671-83. [PMID: 22003076 PMCID: PMC3229142 DOI: 10.1105/tpc.111.088377] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2011] [Revised: 09/12/2011] [Accepted: 10/02/2011] [Indexed: 05/18/2023]
Abstract
Multicellular organisms depend on cell production, cell fate specification, and correct patterning to shape their adult body. In plants, auxin plays a prominent role in the timely coordination of these different cellular processes. A well-studied example is lateral root initiation, in which auxin triggers founder cell specification and cell cycle activation of xylem pole-positioned pericycle cells. Here, we report that the E2Fa transcription factor of Arabidopsis thaliana is an essential component that regulates the asymmetric cell division marking lateral root initiation. Moreover, we demonstrate that E2Fa expression is regulated by the LATERAL ORGAN BOUNDARY DOMAIN18/LATERAL ORGAN BOUNDARY DOMAIN33 (LBD18/LBD33) dimer that is, in turn, regulated by the auxin signaling pathway. LBD18/LBD33 mediates lateral root organogenesis through E2Fa transcriptional activation, whereas E2Fa expression under control of the LBD18 promoter eliminates the need for LBD18. Besides lateral root initiation, vascular patterning is disrupted in E2Fa knockout plants, similarly as it is affected in auxin signaling and lbd mutants, indicating that the transcriptional induction of E2Fa through LBDs represents a general mechanism for auxin-dependent cell cycle activation. Our data illustrate how a conserved mechanism driving cell cycle entry has been adapted evolutionarily to connect auxin signaling with control of processes determining plant architecture.
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Affiliation(s)
- Barbara Berckmans
- Department of Plant Systems Biology, VIB, B-9052 Ghent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052 Ghent, Belgium
| | - Valya Vassileva
- Department of Plant Systems Biology, VIB, B-9052 Ghent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052 Ghent, Belgium
| | - Stephan P.C. Schmid
- Institut für Entwicklungsgenetik, Heinrich-Heine Universität Düsseldorf, D-40225 Duesseldorf, Germany
| | - Sara Maes
- Department of Plant Systems Biology, VIB, B-9052 Ghent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052 Ghent, Belgium
| | - Boris Parizot
- Department of Plant Systems Biology, VIB, B-9052 Ghent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052 Ghent, Belgium
| | - Satoshi Naramoto
- Department of Plant Systems Biology, VIB, B-9052 Ghent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052 Ghent, Belgium
| | - Zoltan Magyar
- Institute of Plant Biology, Biological Research Centre, H-6701 Szeged, Hungary
| | - Claire Lessa Alvim Kamei
- Department of Plant Systems Biology, VIB, B-9052 Ghent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052 Ghent, Belgium
| | - Csaba Koncz
- Max-Planck-Institut für Züchtungsforschung, D-50829 Cologne, Germany
| | - Laszlo Bögre
- Royal Holloway, University of London, Centre for Systems and Synthetic Biology, TW20 0EX Egham, United Kingdom
| | - Geert Persiau
- Department of Plant Systems Biology, VIB, B-9052 Ghent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052 Ghent, Belgium
| | - Geert De Jaeger
- Department of Plant Systems Biology, VIB, B-9052 Ghent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052 Ghent, Belgium
| | - Jiří Friml
- Department of Plant Systems Biology, VIB, B-9052 Ghent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052 Ghent, Belgium
| | - Rüdiger Simon
- Institut für Entwicklungsgenetik, Heinrich-Heine Universität Düsseldorf, D-40225 Duesseldorf, Germany
| | - Tom Beeckman
- Department of Plant Systems Biology, VIB, B-9052 Ghent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052 Ghent, Belgium
| | - Lieven De Veylder
- Department of Plant Systems Biology, VIB, B-9052 Ghent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052 Ghent, Belgium
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Hurkmans EJ, de Gucht V, Maes S, Peeters AJ, Ronday HK, Vliet Vlieland TPM. Promoting physical activity in patients with rheumatoid arthritis: rheumatologists' and health professionals' practice and educational needs. Clin Rheumatol 2011; 30:1603-9. [PMID: 21912880 PMCID: PMC3218269 DOI: 10.1007/s10067-011-1846-7] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2011] [Revised: 06/24/2011] [Accepted: 08/31/2011] [Indexed: 11/29/2022]
Abstract
Despite the proven health benefits, patients with rheumatoid arthritis (RA) are found to be less physically active than their healthy peers. The aim of this study was to examine to what extent and how physical activity, defined as any bodily movement resulting in energy expenditure, is currently promoted by health care providers in patients with RA and how they perceive their competencies and educational needs. For this cross-sectional study, Dutch rheumatologists, rheumatology clinical nurse specialists, and expert physical therapists were sent a postal survey including four domains: attitudes towards physical activity in RA, advices given to patients with RA, and perceived competencies and educational needs. A total of 126 rheumatologists (50%), 132 clinical nurse specialists (56%), and 112 physical therapists (53%) returned the questionnaire. More than 90% agreed that physical activity is an important health goal for RA patients and regularly advised their patients to engage in physical activity. Public health recommendations for moderate-intensity physical activity were found attainable in RA patients by 66%, 74%, and 65% and were by used by 19%, 41%, and 49% of them, respectively. On average, respondents rated their competency to promote physical activity as low to medium, and 54%, 85%, and 72% of the respondents expressed a need for additional education regarding this topic. Rheumatologists, nurses, and physical therapists considered regular physical activity to be an important health goal for RA patients. The majority of them commonly gave advice on physical activity but felt not sufficiently competent and indicated a need for additional education.
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Affiliation(s)
- Emalie J Hurkmans
- Department of Rheumatology, Leiden University Medical Center, C1-R, P.O. Box 9600, Leiden, The Netherlands.
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Oosterlinck M, Raes E, Verbraecken S, van Loon G, Maes S, Gielen I, Lefère L, Saunders JH. Severe lameness caused by metastatic renal adenocarcinoma of the third phalanx in a Warmblood mare. EQUINE VET EDUC 2011. [DOI: 10.1111/j.2042-3292.2011.00282.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Cools T, Iantcheva A, Weimer AK, Boens S, Takahashi N, Maes S, Van den Daele H, Van Isterdael G, Schnittger A, De Veylder L. The Arabidopsis thaliana checkpoint kinase WEE1 protects against premature vascular differentiation during replication stress. Plant Cell 2011; 23:1435-48. [PMID: 21498679 PMCID: PMC3101530 DOI: 10.1105/tpc.110.082768] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2010] [Revised: 03/22/2011] [Accepted: 03/30/2011] [Indexed: 05/17/2023]
Abstract
A sessile lifestyle forces plants to respond promptly to factors that affect their genomic integrity. Therefore, plants have developed checkpoint mechanisms to arrest cell cycle progression upon the occurrence of DNA stress, allowing the DNA to be repaired before onset of division. Previously, the WEE1 kinase had been demonstrated to be essential for delaying progression through the cell cycle in the presence of replication-inhibitory drugs, such as hydroxyurea. To understand the severe growth arrest of WEE1-deficient plants treated with hydroxyurea, a transcriptomics analysis was performed, indicating prolonged S-phase duration. A role for WEE1 during S phase was substantiated by its specific accumulation in replicating nuclei that suffered from DNA stress. Besides an extended replication phase, WEE1 knockout plants accumulated dead cells that were associated with premature vascular differentiation. Correspondingly, plants without functional WEE1 ectopically expressed the vascular differentiation marker VND7, and their vascular development was aberrant. We conclude that the growth arrest of WEE1-deficient plants is due to an extended cell cycle duration in combination with a premature onset of vascular cell differentiation. The latter implies that the plant WEE1 kinase acquired an indirect developmental function that is important for meristem maintenance upon replication stress.
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Affiliation(s)
- Toon Cools
- Department of Plant Systems Biology, VIB, 9052 Ghent, Belgium
- Department of Plant Biotechnology and Genetics, Ghent University, B-9052 Ghent, Belgium
| | - Anelia Iantcheva
- Department of Plant Systems Biology, VIB, 9052 Ghent, Belgium
- Department of Plant Biotechnology and Genetics, Ghent University, B-9052 Ghent, Belgium
| | - Annika K. Weimer
- Department of Molecular Mechanisms of Phenotypic Plasticity, Institut de Biologie Moléculaire des Plantes–Centre National de Recherche Scientifique, Unité Propre de Recherche 2357, Université de Strasbourg, 67084 Strasbourg Cedex, France
| | - Shannah Boens
- Department of Plant Systems Biology, VIB, 9052 Ghent, Belgium
- Department of Plant Biotechnology and Genetics, Ghent University, B-9052 Ghent, Belgium
| | - Naoki Takahashi
- Department of Plant Systems Biology, VIB, 9052 Ghent, Belgium
- Department of Plant Biotechnology and Genetics, Ghent University, B-9052 Ghent, Belgium
| | - Sara Maes
- Department of Plant Systems Biology, VIB, 9052 Ghent, Belgium
- Department of Plant Biotechnology and Genetics, Ghent University, B-9052 Ghent, Belgium
| | - Hilde Van den Daele
- Department of Plant Systems Biology, VIB, 9052 Ghent, Belgium
- Department of Plant Biotechnology and Genetics, Ghent University, B-9052 Ghent, Belgium
| | - Gert Van Isterdael
- Department of Plant Systems Biology, VIB, 9052 Ghent, Belgium
- Department of Plant Biotechnology and Genetics, Ghent University, B-9052 Ghent, Belgium
| | - Arp Schnittger
- Department of Molecular Mechanisms of Phenotypic Plasticity, Institut de Biologie Moléculaire des Plantes–Centre National de Recherche Scientifique, Unité Propre de Recherche 2357, Université de Strasbourg, 67084 Strasbourg Cedex, France
| | - Lieven De Veylder
- Department of Plant Systems Biology, VIB, 9052 Ghent, Belgium
- Department of Plant Biotechnology and Genetics, Ghent University, B-9052 Ghent, Belgium
- Address correspondence to
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Van Immerseel F, Pardon B, Maes S, Heyndrickx M, Timbermont L, Boyen F, Haesebrouck F, Ducatelle R, Deprez P. Isolation of a clonal population of Clostridium perfringens type A from a Belgian Blue calf with abomasal ulceration. J Comp Pathol 2011; 143:289-93. [PMID: 20430403 DOI: 10.1016/j.jcpa.2010.02.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2009] [Revised: 02/07/2010] [Accepted: 02/27/2010] [Indexed: 11/25/2022]
Abstract
A case of abomasal ulceration in a 3-month-old Belgian Blue calf is described. Microscopical examination revealed the ulcers to be demarcated by a band of neutrophilic inflammation that separated underlying healthy tissue from the superficial fibrinous necrotic material in which bacteria were present. Clostridium perfringens type A was isolated from multiple ulcers and from the intestinal contents of the animal and pulsed field gel electrophoresis confirmed that the isolates comprised a genetically clonal population.
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Affiliation(s)
- F Van Immerseel
- Department of Pathology, Bacteriology and Avian Diseases, Ghent University, Salisburylaan 133, B-9820 Merelbeke, Belgium.
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Saey V, Vanhaesebrouck A, Maes S, Simaey LV, Van Ham L, Deschaght P, Ducatelle R. Granulomatous Meningoencephalitis Associated With Sporobolomyces roseus in a Dog. Vet Pathol 2010; 48:1158-60. [DOI: 10.1177/0300985810391110] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
A German Shepherd Dog was evaluated for clinical signs of multifocal, progressive brain disease. Despite supportive care, the dog died shortly after hospital admission. Granulomatous meningoencephalitis with intralesional fungal hyphae was diagnosed postmortem. The fungus was identified as Sporobolomyces roseus by polymerase chain reaction amplification and sequencing of the ITS2 region.
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Affiliation(s)
- V. Saey
- Laboratory of Pathology, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - A. Vanhaesebrouck
- Department of Small Animal Medicine and Clinical Biology, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - S. Maes
- Laboratory of Pathology, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - L. Van Simaey
- Laboratory of Bacteriology, Department of Research (LBR), Ghent University Hospital, Ghent, Belgium
| | - L. Van Ham
- Department of Small Animal Medicine and Clinical Biology, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - P. Deschaght
- Laboratory of Bacteriology, Department of Research (LBR), Ghent University Hospital, Ghent, Belgium
| | - R. Ducatelle
- Laboratory of Pathology, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
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Cools T, Iantcheva A, Maes S, Van den Daele H, De Veylder L. A replication stress-induced synchronization method for Arabidopsis thaliana root meristems. Plant J 2010; 64:705-14. [PMID: 21070422 DOI: 10.1111/j.1365-313x.2010.04361.x] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Synchronized cell cultures are an indispensable tool for the identification and understanding of key regulators of the cell cycle. Nevertheless, the use of cell cultures has its disadvantages, because it represents an artificial system that does not completely mimic the endogenous conditions that occur in organized meristems. Here, we present a new and easy method for Arabidopsis thaliana root tip synchronization by hydroxyurea treatment. A major advantage of the method is the possibility of investigating available Arabidopsis cell-cycle mutants without the need to generate cell cultures. As a proof of concept, the effects of over-expression of a dominant negative allele of the B-type cyclin-dependent kinase CDKB1;1 gene on cell-cycle progression were tested. The previously observed prolonged G₂ phase was confirmed, but was found to be compensated for by a reduced G₁ phase. Furthermore, altered S-phase kinetics indicated a functional role for CDKB1;1 during the replication process.
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Affiliation(s)
- Toon Cools
- Department of Plant Systems Biology, VIB, Technologiepark 927, 9052 Gent, Belgium
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30
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Pardon B, Vandenberge V, Maes S, De Clercq K, Ducatelle R, Deprez P. Oesophageal paresis associated with bluetongue virus serotype 8 in cattle. Vet Rec 2010; 167:579-81. [DOI: 10.1136/vr.c4979] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- B. Pardon
- Department of Large Animal Internal Medicine
| | - V. Vandenberge
- Department of Pathology, Bacteriology and Avian Diseases; Faculty of Veterinary Medicine; Ghent University; Salisburylaan 133 9820 Merelbeke Belgium
| | - S. Maes
- Department of Pathology, Bacteriology and Avian Diseases; Faculty of Veterinary Medicine; Ghent University; Salisburylaan 133 9820 Merelbeke Belgium
| | - K. De Clercq
- Veterinary and Agrochemical Research Centre (CODA/CERVA); Department of Virology; Groeselenberg 99 1180 Brussels Belgium
| | - R. Ducatelle
- Department of Pathology, Bacteriology and Avian Diseases; Faculty of Veterinary Medicine; Ghent University; Salisburylaan 133 9820 Merelbeke Belgium
| | - P. Deprez
- Department of Large Animal Internal Medicine
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31
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Gaamouche T, Manes CLDO, Kwiatkowska D, Berckmans B, Koumproglou R, Maes S, Beeckman T, Vernoux T, Doonan JH, Traas J, Inzé D, De Veylder L. Cyclin-dependent kinase activity maintains the shoot apical meristem cells in an undifferentiated state. Plant J 2010; 64:26-37. [PMID: 20659279 DOI: 10.1111/j.1365-313x.2010.04317.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
As the shoot apex produces most of the cells that comprise the aerial part of the plant, perfect orchestration between cell division rates and fate specification is essential for normal organ formation and plant development. However, the inter-dependence of cell-cycle machinery and meristem-organizing genes is still poorly understood. To investigate this mechanism, we specifically inhibited the cell-cycle machinery in the shoot apex by expression of a dominant negative allele of the A-type cyclin-dependent kinase (CDK) CDKA;1 in meristematic cells. A decrease in the cell division rate within the SHOOT MERISTEMLESS domain of the shoot apex dramatically affected plant growth and development. Within the meristem, a subset of cells was driven into the differentiation pathway, as indicated by premature cell expansion and onset of endo-reduplication. Although the meristem structure and expression patterns of the meristem identity genes were maintained in most plants, the reduced CDK activity caused splitting of the meristem in some plants. This phenotype correlated with the level of expression of the dominant negative CDKA;1 allele. Therefore, we propose a threshold model in which the effect of the cell-cycle machinery on meristem organization is determined by the level of CDK activity.
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Affiliation(s)
- Tarik Gaamouche
- Department of Plant Systems Biology, VIB, 9052 Gent, Belgium
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32
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Govaere J, Maes S, Saey V, Blancke W, Hoogewijs M, Deschauwer C, Smits K, Roels K, Vercauteren G, de Kruif A. Uterine fibrosarcoma in a Warmblood mare. Reprod Domest Anim 2010; 46:564-6. [PMID: 21545654 DOI: 10.1111/j.1439-0531.2010.01694.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
This paper describes a case of uterine fibrosarcoma in an 18-year-old Warmblood mare. The mare had exhibited bloody fluid accumulation inside the uterus and vaginal haemorrhagic discharge since the previous foaling. The mare was euthanized, and on pathological examination, in addition to the uterine neoplasia, multiple metastases were found in the lungs, liver and spleen. The histological and immunohistochemical examination determined that the tumour was a fibrosarcoma. To our knowledge, this is the first paper to describe a uterine fibrosarcoma in a mare.
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Affiliation(s)
- J Govaere
- Department of Reproduction, Obstetrics and Herd Health, Faculty of Veterinary Medicine, Ghent University, Salisburylaan, Belgium.
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33
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Hurkmans EJ, Maes S, de Gucht V, Knittle K, Peeters AJ, Ronday HK, Vlieland TPMV. Motivation as a determinant of physical activity in patients with rheumatoid arthritis. Arthritis Care Res (Hoboken) 2010; 62:371-7. [DOI: 10.1002/acr.20106] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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34
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Pardon B, Steukers L, Dierick J, Ducatelle R, Saey V, Maes S, Vercauteren G, De Clercq K, Callens J, De Bleecker K, Deprez P. Haemorrhagic diathesis in neonatal calves: an emerging syndrome in Europe. Transbound Emerg Dis 2010; 57:135-46. [PMID: 20202175 DOI: 10.1111/j.1865-1682.2010.01098.x] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In 2008 and 2009 a large number of cases of haemorrhagic diathesis (HD) in neonatal calves were reported in different European countries. In Flanders, 84 cases of neonatal HD in 30 herds were reported in this period. The disease typically affects calves younger than 1 month old from different breed and gender. Prominent clinical signs are cutaneous bleeding, petechiae on all mucosae, melena and often high fever. Early in the disease, the mental state of the animals is uncompromised. The typical haematological finding is pancytopenia, with severe to complete thrombocytopenia being the cause of the increased susceptibility to bleeding. In seven of the affected herds blood samples of calves of the same age group as the clinical case were collected and on six of those farms at least one subclinical case could be identified. Necropsy findings were generalized petechiae, ecchymoses or haemorrhages and variable lymphadenopathy. Histopathology of haemorrhagic lesions revealed multifocal extravasation of red blood cells (haemorrhage) with preservation of tissue architecture and absence of other abnormalities. Total bone marrow aplasia and depletion of all lymphoid tissue was the most prominent finding on histology. Activated macrophages and haemophagocytosis were seen on bone marrow cytology from two live calves. Polymerase chain reaction for bovine viral diarrhoea virus, bluetongue and epizootic haemorrhagic disease virus was negative. Several attempts to isolate a viral agent were unsuccessful.
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Affiliation(s)
- B Pardon
- Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium.
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35
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Maes S, Van Goethem B, Saunders J, Binst D, Chiers K, Ducatelle R. Pneumomediastinum and Subcutaneous Emphysema in a Cat Associated with Necrotizing Bronchopneumonia Caused by Felid Herpesvirus-1. J Comp Pathol 2009. [DOI: 10.1016/j.jcpa.2009.08.024] [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: 11/28/2022]
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36
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Boudolf V, Lammens T, Boruc J, Van Leene J, Van Den Daele H, Maes S, Van Isterdael G, Russinova E, Kondorosi E, Witters E, De Jaeger G, Inzé D, De Veylder L. CDKB1;1 forms a functional complex with CYCA2;3 to suppress endocycle onset. Plant Physiol 2009; 150:1482-93. [PMID: 19458112 PMCID: PMC2705057 DOI: 10.1104/pp.109.140269] [Citation(s) in RCA: 92] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2009] [Accepted: 05/15/2009] [Indexed: 05/19/2023]
Abstract
The mitosis-to-endocycle transition requires the controlled inactivation of M phase-associated cyclin-dependent kinase (CDK) activity. Previously, the B-type CDKB1;1 was identified as an important negative regulator of endocycle onset. Here, we demonstrate that CDKB1;1 copurifies and associates with the A2-type cyclin CYCA2;3. Coexpression of CYCA2;3 with CDKB1;1 triggered ectopic cell divisions and inhibited endoreduplication. Moreover, the enhanced endoreduplication phenotype observed after overexpression of a dominant-negative allele of CDKB1;1 could be partially complemented by CYCA2;3 co-overexpression, illustrating that both subunits unite in vivo to form a functional complex. CYCA2;3 protein stability was found to be controlled by CCS52A1, an activator of the anaphase-promoting complex. We conclude that CCS52A1 participates in endocycle onset by down-regulating CDKB1;1 activity through the destruction of CYCA2;3.
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Affiliation(s)
- Véronique Boudolf
- Department of Plant Systems Biology, Flanders Institute for Biotechnology, 9052 Ghent, Belgium
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Alvim Kamei CL, Boruc J, Vandepoele K, Van den Daele H, Maes S, Russinova E, Inzé D, De Veylder L. The PRA1 gene family in Arabidopsis. Plant Physiol 2008; 147:1735-49. [PMID: 18583532 PMCID: PMC2492607 DOI: 10.1104/pp.108.122226] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2008] [Accepted: 06/25/2008] [Indexed: 05/18/2023]
Abstract
Prenylated Rab acceptor 1 (PRA1) domain proteins are small transmembrane proteins that regulate vesicle trafficking as receptors of Rab GTPases and the vacuolar soluble N-ethylmaleimide-sensitive factor attachment receptor protein VAMP2. However, little is known about PRA1 family members in plants. Sequence analysis revealed that higher plants, compared with animals and primitive plants, possess an expanded family of PRA1 domain-containing proteins. The Arabidopsis (Arabidopsis thaliana) PRA1 (AtPRA1) proteins were found to homodimerize and heterodimerize in a manner corresponding to their phylogenetic distribution. Different AtPRA1 family members displayed distinct expression patterns, with a preference for vascular cells and expanding or developing tissues. AtPRA1 genes were significantly coexpressed with Rab GTPases and genes encoding vesicle transport proteins, suggesting an involvement in the vesicle trafficking process similar to that of their animal counterparts. Correspondingly, AtPRA1 proteins were localized in the endoplasmic reticulum, Golgi apparatus, and endosomes/prevacuolar compartments, hinting at a function in both secretory and endocytic intracellular trafficking pathways. Taken together, our data reveal a high functional diversity of AtPRA1 proteins, probably dealing with the various demands of the complex trafficking system.
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Affiliation(s)
- Claire Lessa Alvim Kamei
- Instituto de Bioquímica Médica, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-590, Brazil
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38
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Tack F, Bakker A, Maes S, Dekeyser N, Bruining M, Elissen-Roman C, Janicot M, Janssen HM, De Waal BFM, Fransen PM, Lou X, Meijer EW, Arien A, Brewster ME. Dendrimeric poly(propylene-imines) as effective delivery agents for DNAzymes: dendrimer synthesis, stability and oligonucleotide complexation. J Control Release 2007; 116:e24-6. [PMID: 17718950 DOI: 10.1016/j.jconrel.2006.09.030] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- F Tack
- Oncology Discovery Research and Early Development, Johnson and Johnson Pharmaceutical Research and Development, Beerse, Belgium
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39
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Quoilin S, Lambion N, Mak R, Denis O, Lammens C, Struelens M, Maes S, Goossens H. Soft tissue infections in Belgian rugby players due to Streptococcus pyogenes emm type 81. ACTA ACUST UNITED AC 2006; 11:E061221.2. [PMID: 17213570 DOI: 10.2807/esw.11.51.03099-en] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- S Quoilin
- Scientific Institute of Public Health, Brussels, Belgium.
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40
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Boersma SN, Maes S. Psychological consequences of myocardial infarction: a self-regulation perspective on health-related quality of life and cardiac rehabilitation. Neth Heart J 2006; 14:335-338. [PMID: 25696560 PMCID: PMC2557324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023] Open
Abstract
The aim of this review was to gain insight into prevalence of and interventions targeted specifically at psychological distress and health-related quality of life (HRQL) after a myocardial infarction (MI). For this purpose, self-regulation theory was introduced as frame of reference. Psychological distress and a reduction in HRQL after an MI are prevalent and can, for some patients, be persistent. This can negatively influence secondary prevention efforts, adherence, return to work and progression of the underlying coronary heart disease. At the same time, the effectiveness of cardiac rehabilitation programmes in improving HRQL is inconclusive. By starting off from a theoretical framework, effective strategies can be either identified or developed. Self-regulation theory is concerned with the process of goal setting and goal attainment and offers a model for explaining well-being and quality of life. The usefulness of this theory is supported by empirical evidence. Psychological factors derived from this theoretical framework (e.g. higher order goal disturbance) are associated with psychological distress and HRQL in the short and medium term after an MI and should thus be the target of cardiac rehabilitation programmes.
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Beaude L, Line S, Bossu S, Lachambre N, Maes S, Pham M. Exemple de démarche pluridisciplinaire : réalisation d’un guide de « bonnes pratiques »dans les structures d’accueil de jeunes enfants(crèche, halte-garderie, multi accueil)ou la conjugaison de la pluridisciplinarité« je, nous, on ». ARCH MAL PROF ENVIRO 2006. [DOI: 10.1016/s1775-8785(06)78290-x] [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: 12/01/2022]
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42
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Snacken R, Maes S. [Concern about vaccination: which vaccine in the event of pandemic influenza?]. Rev Med Brux 2006; 27:75-6. [PMID: 16736843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Affiliation(s)
- R Snacken
- Département d'Epidémiologie-Toxicologie, Institut Scientifique de Santé Publique
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43
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Akerboom S, Maes S. Beyond demand and control: The contribution of organizational risk factors in assessing the psychological well-being of health care employees. Work & Stress 2006. [DOI: 10.1080/02678370600690915] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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44
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Quoilin S, Thomas I, Gérard C, Maes S, Haucotte G, Gerard M, Van Laethem Y, Snacken R, Hanquet G, Brochier B, Robesyn E. Management of potential human cases of influenza A/H5N1: lessons from Belgium. ACTA ACUST UNITED AC 2006; 11:E060126.1. [PMID: 16801712 DOI: 10.2807/esw.11.04.02885-en] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [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: 11/20/2022]
Abstract
Since the first human cases of influenza A/H5N1 were widely reported from Turkey in early January, many European patients with suspected influenza
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Affiliation(s)
- S Quoilin
- Scientific Institute of Public Health, Brussels, Belgium.
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45
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Vanthemsche P, Robesyn E, Claeys H, Matthijs B, Snacken R, Maes S, Jooris I, Reynders D, Guilmin P, Janssens W, Moriaux R, Haucotte G. [Influenza: an example of interdisciplinary analysis of risks]. Bull Mem Acad R Med Belg 2006; 161:246-58. [PMID: 17283897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
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46
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Snacken R, Hanquet G, Maes S, Brochier B. [Avian flu: what kind of danger for public health?]. Rev Med Brux 2005; 26:481-3. [PMID: 16454151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
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47
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Verkest A, Manes CLDO, Vercruysse S, Maes S, Van Der Schueren E, Beeckman T, Genschik P, Kuiper M, Inzé D, De Veylder L. The cyclin-dependent kinase inhibitor KRP2 controls the onset of the endoreduplication cycle during Arabidopsis leaf development through inhibition of mitotic CDKA;1 kinase complexes. Plant Cell 2005; 17:1723-36. [PMID: 15863515 PMCID: PMC1143072 DOI: 10.1105/tpc.105.032383] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Exit from the mitotic cell cycle and initiation of cell differentiation frequently coincides with the onset of endoreduplication, a modified cell cycle during which DNA continues to be duplicated in the absence of mitosis. Although the mitotic cell cycle and the endoreduplication cycle share much of the same machinery, the regulatory mechanisms controlling the transition between both cycles remain poorly understood. We show that the A-type cyclin-dependent kinase CDKA;1 and its specific inhibitor, the Kip-related protein, KRP2 regulate the mitosis-to-endocycle transition during Arabidopsis thaliana leaf development. Constitutive overexpression of KRP2 slightly above its endogenous level only inhibited the mitotic cell cycle-specific CDKA;1 kinase complexes, whereas the endoreduplication cycle-specific CDKA;1 complexes were unaffected, resulting in an increase in the DNA ploidy level. An identical effect on the endoreduplication cycle could be observed by overexpressing KRP2 exclusively in mitotically dividing cells. In agreement with a role for KRP2 as activator of the mitosis-to-endocycle transition, KRP2 protein levels were more abundant in endoreduplicating than in mitotically dividing tissues. We illustrate that KRP2 protein abundance is regulated posttranscriptionally through CDK phosphorylation and proteasomal degradation. KRP2 phosphorylation by the mitotic cell cycle-specific CDKB1;1 kinase suggests a mechanism in which CDKB1;1 controls the level of CDKA;1 activity through regulating KRP2 protein abundance. In accordance with this model, KRP2 protein levels increased in plants with reduced CDKB1;1 activity. Moreover, the proposed model allowed a dynamical simulation of the in vivo observations, validating the sufficiency of the regulatory interactions between CDKA;1, KRP2, and CDKB1;1 in fine-tuning the mitosis-to-endocycle transition.
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Affiliation(s)
- Aurine Verkest
- Department of Plant Systems Biology, Flanders Interuniversity Institute for Biotechnology, Ghent University, B-9052 Gent, Belgium
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48
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Vlieghe K, Boudolf V, Beemster GTS, Maes S, Magyar Z, Atanassova A, de Almeida Engler J, De Groodt R, Inzé D, De Veylder L. The DP-E2F-like gene DEL1 controls the endocycle in Arabidopsis thaliana. Curr Biol 2005; 15:59-63. [PMID: 15649366 DOI: 10.1016/j.cub.2004.12.038] [Citation(s) in RCA: 147] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2004] [Revised: 11/03/2004] [Accepted: 11/03/2004] [Indexed: 11/21/2022]
Abstract
Endoreduplication or DNA replication without mitosis is widespread in nature. Well-known examples are fruit fly polytene chromosomes and cereal endosperm. Although endocycles are thought to be driven by the same regulators as those that control the G1-S transition of the mitotic cell cycle, the molecular mechanisms that differentiate mitotically dividing cells from endoreduplicating ones are largely unknown. A novel class of atypical E2F-like proteins has recently been identified and is designated E2F7 in mammals and DP-E2F-like (DEL) in Arabidopsis thaliana . We demonstrate that loss of DEL1 function resulted in increased ploidy levels, whereas ectopic expression of DEL1 reduced endoreduplication. Ploidy changes were correlated with altered expression of a subset of E2F target genes encoding proteins necessary for DNA replication. Because DEL1 proteins were postulated to antagonize the E2F pathway, we generated DEL1-E2Fa-DPa triple transgenics. DEL1 inhibited the endoreduplication phenotype, but not the ectopic cell divisions that resulted from the overexpression of both E2Fa and DPa, illustrating that DEL1 specifically represses the endocycle. Because DEL1 transcripts were detected exclusively in mitotically dividing cells, we conclude that DEL1 is an important novel inhibitor of the endocycle and preserves the mitotic state of proliferating cells by suppressing transcription of genes that are required for cells to enter the DNA endoreduplication cycle.
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Affiliation(s)
- Kobe Vlieghe
- Department of Plant Systems Biology, Flanders Interuniversity Institute for Biotechnology, Ghent University, Technologiepark 927, Gent B-9052, Belgium
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49
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Boudolf V, Vlieghe K, Beemster GTS, Magyar Z, Torres Acosta JA, Maes S, Van Der Schueren E, Inzé D, De Veylder L. The plant-specific cyclin-dependent kinase CDKB1;1 and transcription factor E2Fa-DPa control the balance of mitotically dividing and endoreduplicating cells in Arabidopsis. Plant Cell 2004; 16:2683-92. [PMID: 15377755 PMCID: PMC520964 DOI: 10.1105/tpc.104.024398] [Citation(s) in RCA: 198] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2004] [Accepted: 08/03/2004] [Indexed: 05/17/2023]
Abstract
Transgenic Arabidopsis thaliana plants overproducing the E2Fa-DPa transcription factor have two distinct cell-specific phenotypes: some cells divide ectopically and others are stimulated to endocycle. The decision of cells to undergo extra mitotic divisions has been postulated to depend on the presence of a mitosis-inducing factor (MIF). Plants possess a unique class of cyclin-dependent kinases (CDKs; B-type) for which no ortholog is found in other kingdoms. The peak of CDKB1;1 activity around the G2-M boundary suggested that it might be part of the MIF. Plants that overexpressed a dominant negative allele of CDKB1;1 underwent enhanced endoreduplication, demonstrating that CDKB1;1 activity was required to inhibit the endocycle. Moreover, when the mutant CDKB1;1 allele was overexpressed in an E2Fa-DPa-overproducing background, it enhanced the endoreduplication phenotype, whereas the extra mitotic cell divisions normally induced by E2Fa-DPa were repressed. Surprisingly, CDKB1;1 transcription was controlled by the E2F pathway, as shown by its upregulation in E2Fa-DPa-overproducing plants and mutational analysis of the E2F binding site in the CDKB1;1 promoter. These findings illustrate a cross talking mechanism between the G1-S and G2-M transition points.
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Affiliation(s)
- Véronique Boudolf
- Department of Plant Systems Biology, Flanders Interuniversity Institute for Biotechnology, Ghent University, B-9052 Gent, Belgium
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Vlieghe K, Vuylsteke M, Florquin K, Rombauts S, Maes S, Ormenese S, Van Hummelen P, Van de Peer Y, Inze D, De Veylder L. Microarray analysis of E2Fa-DPa-overexpressing plants uncovers a cross-talking genetic network between DNA replication and nitrogen assimilation. J Cell Sci 2003; 116:4249-59. [PMID: 12953064 DOI: 10.1242/jcs.00715] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.0] [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: 12/18/2022] Open
Abstract
Previously we have shown that overexpression of the heterodimeric E2Fa-DPa transcription factor in Arabidopsis thaliana results in ectopic cell division, increased endoreduplication, and an early arrest in development. To gain a better insight into the phenotypic behavior of E2Fa-DPa transgenic plants and to identify E2Fa-DPa target genes, a transcriptomic microarray analysis was performed. Out of 4,390 unique genes, a total of 188 had a twofold or more up- (84) or down-regulated (104) expression level in E2Fa-DPa transgenic plants compared to wild-type lines. Detailed promoter analysis allowed the identification of novel E2Fa-DPa target genes, mainly involved in DNA replication. Secondarily induced genes encoded proteins involved in cell wall biosynthesis, transcription and signal transduction or had an unknown function. A large number of metabolic genes were modified as well, among which, surprisingly, many genes were involved in nitrate assimilation. Our data suggest that the growth arrest observed upon E2Fa-DPa overexpression results at least partly from a nitrogen drain to the nucleotide synthesis pathway, causing decreased synthesis of other nitrogen compounds, such as amino acids and storage proteins.
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Affiliation(s)
- Kobe Vlieghe
- Department of Plant Systems Biology, Flanders Interuniversity Institute for Biotechnology, Ghent University, B-9052 Gent, Belgium
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