1
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Hanssen DAT, Arts K, Nix WHV, Sweelssen NNB, Welbers TTJ, de Theije C, Wieten L, Pagen DME, Brinkhues S, Penders J, Dukers-Muijrers NHTM, Hoebe CJPA, Savelkoul PHM, van Loo IHM. SARS-CoV-2 cellular and humoral responses in vaccine-naive individuals during the first two waves of COVID-19 infections in the southern region of The Netherlands: a cross-sectional population-based study. Microbiol Spectr 2024:e0012624. [PMID: 38686954 DOI: 10.1128/spectrum.00126-24] [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] [Received: 01/18/2024] [Accepted: 04/08/2024] [Indexed: 05/02/2024] Open
Abstract
With the emergence of highly transmissible variants of concern, severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) still poses a global threat of coronavirus disease 2019 (COVID-19) resurgence. Cellular responses to novel variants are more robustly maintained than humoral responses, and therefore, cellular responses are of interest in assessing immune protection against severe disease in the population. We aimed to assess cellular responses to SARS-CoV-2 at the population level. IFNγ (interferon γ) responses to wild-type SARS-CoV-2 were analyzed using an ELISpot assay in vaccine-naive individuals with different humoral responses: Ig (IgM and/or IgG) seronegative (n = 90) and seropositive (n = 181) with low (<300 U/mL) or high (≥300 U/mL) humoral responses to the spike receptor binding domain (anti-S-RBD). Among the seropositive participants, 71.3% (129/181) were IFNγ ELISpot positive, compared to 15.6% (14/90) among the seronegative participants. Common COVID-19 symptoms such as fever and ageusia were associated with IFNγ ELISpot positivity in seropositive participants, whereas no participant characteristics were associated with IFNγ ELISpot positivity in seronegative participants. Fever and/or dyspnea and anti-S-RBD levels were associated with higher IFNγ responses. Symptoms of more severe disease and higher anti-S-RBD responses were associated with higher IFNγ responses. A significant proportion (15.6%) of seronegative participants had a positive IFNγ ELISpot. Assessment of cellular responses may improve estimates of the immune response to SARS-CoV-2 in the general population. IMPORTANCE Data on adaptive cellular immunity are of interest to define immune protection against severe acute respiratory syndrome coronavirus 2 in a population, which is important for decision-making on booster-vaccination strategies. This study provides data on associations between participant characteristics and cellular immune responses in vaccine-naive individuals with different humoral responses.
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Affiliation(s)
- D A T Hanssen
- Department of Medical Microbiology, Infectious Diseases and Infection Prevention, Maastricht University Medical Center, Maastricht, The Netherlands
- Care and Public Health Research Institute (CAPHRI), Maastricht University, Maastricht, The Netherlands
| | - K Arts
- Department of Medical Microbiology, Infectious Diseases and Infection Prevention, Maastricht University Medical Center, Maastricht, The Netherlands
| | - W H V Nix
- Department of Medical Microbiology, Infectious Diseases and Infection Prevention, Maastricht University Medical Center, Maastricht, The Netherlands
| | - N N B Sweelssen
- Department of Medical Microbiology, Infectious Diseases and Infection Prevention, Maastricht University Medical Center, Maastricht, The Netherlands
| | - T T J Welbers
- Department of Medical Microbiology, Infectious Diseases and Infection Prevention, Maastricht University Medical Center, Maastricht, The Netherlands
| | - C de Theije
- BioBank Maastricht UMC+, Maastricht University Medical Center, Maastricht, The Netherlands
| | - L Wieten
- Department of Transplantation Immunology, Maastricht University Medical Center, Maastricht, The Netherlands
| | - D M E Pagen
- Care and Public Health Research Institute (CAPHRI), Maastricht University, Maastricht, The Netherlands
- Department of Sexual Health, Infectious Diseases and Environmental Health, Living Lab Public Health, Public Health Service (GGD) South Limburg, Heerlen, The Netherlands
- Department of Social Medicine, Maastricht University, Maastricht, The Netherlands
| | - S Brinkhues
- Department of Knowledge and Innovation, Public Health Service (GGD) South Limburg, Heerlen, The Netherlands
| | - J Penders
- Department of Medical Microbiology, Infectious Diseases and Infection Prevention, Maastricht University Medical Center, Maastricht, The Netherlands
- Care and Public Health Research Institute (CAPHRI), Maastricht University, Maastricht, The Netherlands
- Department of Medical Microbiology, School of Nutrition and Translational Research in Metabolism (NUTRIM), Maastricht University Medical Center, Maastricht, The Netherlands
| | - N H T M Dukers-Muijrers
- Care and Public Health Research Institute (CAPHRI), Maastricht University, Maastricht, The Netherlands
- Department of Sexual Health, Infectious Diseases and Environmental Health, Living Lab Public Health, Public Health Service (GGD) South Limburg, Heerlen, The Netherlands
- Department of Health Promotion, Maastricht University, Maastricht, The Netherlands
| | - C J P A Hoebe
- Department of Medical Microbiology, Infectious Diseases and Infection Prevention, Maastricht University Medical Center, Maastricht, The Netherlands
- Care and Public Health Research Institute (CAPHRI), Maastricht University, Maastricht, The Netherlands
- Department of Sexual Health, Infectious Diseases and Environmental Health, Living Lab Public Health, Public Health Service (GGD) South Limburg, Heerlen, The Netherlands
- Department of Social Medicine, Maastricht University, Maastricht, The Netherlands
| | - P H M Savelkoul
- Department of Medical Microbiology, Infectious Diseases and Infection Prevention, Maastricht University Medical Center, Maastricht, The Netherlands
- Care and Public Health Research Institute (CAPHRI), Maastricht University, Maastricht, The Netherlands
| | - I H M van Loo
- Department of Medical Microbiology, Infectious Diseases and Infection Prevention, Maastricht University Medical Center, Maastricht, The Netherlands
- Care and Public Health Research Institute (CAPHRI), Maastricht University, Maastricht, The Netherlands
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2
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Saunders C, Foote JEJ, Wojciechowski JP, Cammack A, Pedersen SV, Doutch JJ, Barriga HMG, Holme MN, Penders J, Chami M, Najer A, Stevens MM. Revealing Population Heterogeneity in Vesicle-Based Nanomedicines Using Automated, Single Particle Raman Analysis. ACS Nano 2023; 17:11713-11728. [PMID: 37279338 PMCID: PMC10311594 DOI: 10.1021/acsnano.3c02452] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Accepted: 05/30/2023] [Indexed: 06/08/2023]
Abstract
The intrinsic heterogeneity of many nanoformulations is currently challenging to characterize on both the single particle and population level. Therefore, there is great opportunity to develop advanced techniques to describe and understand nanomedicine heterogeneity, which will aid translation to the clinic by informing manufacturing quality control, characterization for regulatory bodies, and connecting nanoformulation properties to clinical outcomes to enable rational design. Here, we present an analytical technique to provide such information, while measuring the nanocarrier and cargo simultaneously with label-free, nondestructive single particle automated Raman trapping analysis (SPARTA). We first synthesized a library of model compounds covering a range of hydrophilicities and providing distinct Raman signals. These compounds were then loaded into model nanovesicles (polymersomes) that can load both hydrophobic and hydrophilic cargo into the membrane or core regions, respectively. Using our analytical framework, we characterized the heterogeneity of the population by correlating the signal per particle from the membrane and cargo. We found that core and membrane loading can be distinguished, and we detected subpopulations of highly loaded particles in certain cases. We then confirmed the suitability of our technique in liposomes, another nanovesicle class, including the commercial formulation Doxil. Our label-free analytical technique precisely determines cargo location alongside loading and release heterogeneity in nanomedicines, which could be instrumental for future quality control, regulatory body protocols, and development of structure-function relationships to bring more nanomedicines to the clinic.
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Affiliation(s)
- Catherine Saunders
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical
Engineering, Imperial College London, London SW7 2AZ, United Kingdom
| | - James E. J. Foote
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical
Engineering, Imperial College London, London SW7 2AZ, United Kingdom
| | - Jonathan P. Wojciechowski
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical
Engineering, Imperial College London, London SW7 2AZ, United Kingdom
| | - Ana Cammack
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical
Engineering, Imperial College London, London SW7 2AZ, United Kingdom
| | - Simon V. Pedersen
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical
Engineering, Imperial College London, London SW7 2AZ, United Kingdom
| | - James J. Doutch
- ISIS
Neutron and Muon Source, Rutherford Appleton Laboratory, Science and Technology Facilities Council, Didcot OX11 ODE, United Kingdom
| | - Hanna M. G. Barriga
- Department
of Medical Biochemistry and Biophysics, Karolinska Institutet, SE-171 77 Stockholm, Sweden
| | - Margaret N. Holme
- Department
of Medical Biochemistry and Biophysics, Karolinska Institutet, SE-171 77 Stockholm, Sweden
| | - Jelle Penders
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical
Engineering, Imperial College London, London SW7 2AZ, United Kingdom
| | - Mohamed Chami
- BioEM
Lab, Biozentrum, University of Basel, Mattenstrasse 26, 4058 Basel, Switzerland
| | - Adrian Najer
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical
Engineering, Imperial College London, London SW7 2AZ, United Kingdom
| | - Molly M. Stevens
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical
Engineering, Imperial College London, London SW7 2AZ, United Kingdom
- Department
of Medical Biochemistry and Biophysics, Karolinska Institutet, SE-171 77 Stockholm, Sweden
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3
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Barnett D, Endika M, Klostermann C, Gu F, Thijs C, Nauta A, Schols H, Smidt H, Arts I, Penders J. Human milk oligosaccharides, antimicrobial drugs, and the gut microbiota of term neonates: observations from the KOALA birth cohort study. Gut Microbes 2023; 15:2164152. [PMID: 36617628 PMCID: PMC9833409 DOI: 10.1080/19490976.2022.2164152] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Revised: 12/01/2022] [Accepted: 12/27/2022] [Indexed: 01/10/2023] Open
Abstract
The infant gut microbiota affects childhood health. This pioneer microbiota may be vulnerable to antibiotic exposures, but could be supported by prebiotic oligosaccharides found in breast milk and some infant formulas. We sought to characterize the effects of several exposures on the neonatal gut microbiota, including human milk oligosaccharides (HMOs), galacto-oligosaccharides (GOS), and infant/maternal antimicrobial exposures. We profiled the stool microbiota of 1023 one-month-old infants from the KOALA Birth Cohort using 16S rRNA gene amplicon sequencing. We quantified 15 HMOs in breast milk from the mothers of 220 infants, using high-performance liquid chromatography-mass spectrometry. Both breastfeeding and antibiotic exposure decreased gut microbial diversity, but each was associated with contrasting shifts in microbiota composition. Other factors associated with microbiota composition included C-section, homebirth, siblings, and exposure to animals. Neither infant exposure to oral antifungals nor maternal exposure to antibiotics during pregnancy were associated with infant microbiota composition. Four distinct groups of breast milk HMO compositions were evident, corresponding to maternal Secretor status and Lewis group combinations defined by the presence/absence of certain fucosylated HMOs. However, we found the strongest evidence for microbiota associations between two non-fucosylated HMOs: 6'-sialyllactose (6'-SL) and lacto-N-hexaose (LNH), which were associated with lower and higher relative abundances of Bifidobacterium, respectively. Among 111 exclusively formula-fed infants, the GOS-supplemented formula was associated with a lower relative abundance of Clostridium perfringens. In conclusion, the gut microbiota is sensitive to some prebiotic and antibiotic exposures during early infancy and understanding their effects could inform future strategies for safeguarding a health-promoting infant gut microbiota.
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Affiliation(s)
- D.J.M Barnett
- Maastricht Centre for Systems Biology (MaCSBio), Maastricht University, Maastricht, The Netherlands
- Department of Medical Microbiology, Maastricht University Medical Center, Maastricht, The Netherlands
| | - M.F Endika
- Laboratory of Microbiology, Wageningen University & Research, Wageningen, The Netherlands
| | - C.E Klostermann
- Biobased Chemistry and Technology, Wageningen University & Research, Wageningen, the Netherlands
| | - F Gu
- Laboratory of Food Chemistry, Wageningen University & Research, Wageningen, The Netherlands
| | - C Thijs
- Department of Epidemiology, Maastricht University, Maastricht, The Netherlands
- CAPHRI Care and Public Health Research Institute, Maastricht University Medical Center, Maastricht, The Netherlands
| | - A Nauta
- FrieslandCampina, LE Amersfoort, The Netherlands
| | - H.A Schols
- Laboratory of Food Chemistry, Wageningen University & Research, Wageningen, The Netherlands
| | - H Smidt
- Laboratory of Microbiology, Wageningen University & Research, Wageningen, The Netherlands
| | - I.C.W Arts
- Maastricht Centre for Systems Biology (MaCSBio), Maastricht University, Maastricht, The Netherlands
| | - J Penders
- Department of Medical Microbiology, Maastricht University Medical Center, Maastricht, The Netherlands
- CAPHRI Care and Public Health Research Institute, Maastricht University Medical Center, Maastricht, The Netherlands
- NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Center, Maastricht, The Netherlands
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4
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Hillege L, Waelen J, Ziemons J, Aarnoutse R, De Vos-Geelen J, De Boer M, Van Riet Y, Vincent J, Venema K, Rensen S, Simpson J, Redinbo M, Penders J, Smidt M. Bacterial β-glucuronidase activity in postmenopausal breast cancer patients: a pilot study. Eur J Cancer 2022. [DOI: 10.1016/s0959-8049(22)01578-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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5
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Najer A, Blight J, Ducker CB, Gasbarri M, Brown JC, Che J, Høgset H, Saunders C, Ojansivu M, Lu Z, Lin Y, Yeow J, Rifaie-Graham O, Potter M, Tonkin R, Penders J, Doutch JJ, Georgiadou A, Barriga HMG, Holme MN, Cunnington AJ, Bugeon L, Dallman MJ, Barclay WS, Stellacci F, Baum J, Stevens MM. Potent Virustatic Polymer-Lipid Nanomimics Block Viral Entry and Inhibit Malaria Parasites In Vivo. ACS Cent Sci 2022; 8:1238-1257. [PMID: 36188342 PMCID: PMC9092191 DOI: 10.1021/acscentsci.1c01368] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Infectious diseases continue to pose a substantial burden on global populations, requiring innovative broad-spectrum prophylactic and treatment alternatives. Here, we have designed modular synthetic polymer nanoparticles that mimic functional components of host cell membranes, yielding multivalent nanomimics that act by directly binding to varied pathogens. Nanomimic blood circulation time was prolonged by reformulating polymer-lipid hybrids. Femtomolar concentrations of the polymer nanomimics were sufficient to inhibit herpes simplex virus type 2 (HSV-2) entry into epithelial cells, while higher doses were needed against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Given their observed virustatic mode of action, the nanomimics were also tested with malaria parasite blood-stage merozoites, which lose their invasive capacity after a few minutes. Efficient inhibition of merozoite invasion of red blood cells was demonstrated both in vitro and in vivo using a preclinical rodent malaria model. We envision these nanomimics forming an adaptable platform for developing pathogen entry inhibitors and as immunomodulators, wherein nanomimic-inhibited pathogens can be secondarily targeted to sites of immune recognition.
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Affiliation(s)
- Adrian Najer
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical
Engineering, Imperial College London, London, SW7 2AZ, U.K.
- Department
of Life Sciences, Imperial College London, London, SW7 2AZ, U.K.
| | - Joshua Blight
- Department
of Life Sciences, Imperial College London, London, SW7 2AZ, U.K.
| | | | - Matteo Gasbarri
- Institute
of Materials, Ecole Polytechnique Fédérale
de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Jonathan C. Brown
- Department
of Infectious Disease, Imperial College
London, London, W2 1PG, U.K.
| | - Junyi Che
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical
Engineering, Imperial College London, London, SW7 2AZ, U.K.
| | - Håkon Høgset
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical
Engineering, Imperial College London, London, SW7 2AZ, U.K.
| | - Catherine Saunders
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical
Engineering, Imperial College London, London, SW7 2AZ, U.K.
| | - Miina Ojansivu
- Department
of Medical Biochemistry and Biophysics, Karolinska Institutet, SE-171 77 Stockholm, Sweden
| | - Zixuan Lu
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical
Engineering, Imperial College London, London, SW7 2AZ, U.K.
| | - Yiyang Lin
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical
Engineering, Imperial College London, London, SW7 2AZ, U.K.
| | - Jonathan Yeow
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical
Engineering, Imperial College London, London, SW7 2AZ, U.K.
| | - Omar Rifaie-Graham
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical
Engineering, Imperial College London, London, SW7 2AZ, U.K.
| | - Michael Potter
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical
Engineering, Imperial College London, London, SW7 2AZ, U.K.
| | - Renée Tonkin
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical
Engineering, Imperial College London, London, SW7 2AZ, U.K.
| | - Jelle Penders
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical
Engineering, Imperial College London, London, SW7 2AZ, U.K.
| | - James J. Doutch
- Rutherford
Appleton Laboratory, ISIS Neutron and Muon
Source, STFC, Didcot OX11 ODE, U.K.
| | - Athina Georgiadou
- Department
of Infectious Disease, Imperial College
London, London, W2 1PG, U.K.
| | - Hanna M. G. Barriga
- Department
of Medical Biochemistry and Biophysics, Karolinska Institutet, SE-171 77 Stockholm, Sweden
| | - Margaret N. Holme
- Department
of Medical Biochemistry and Biophysics, Karolinska Institutet, SE-171 77 Stockholm, Sweden
| | | | - Laurence Bugeon
- Department
of Life Sciences, Imperial College London, London, SW7 2AZ, U.K.
| | | | - Wendy S. Barclay
- Department
of Infectious Disease, Imperial College
London, London, W2 1PG, U.K.
| | - Francesco Stellacci
- Institute
of Materials, Ecole Polytechnique Fédérale
de Lausanne (EPFL), 1015 Lausanne, Switzerland
- Institute
of Bioengineering, Ecole Polytechnique Fédérale
de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Jake Baum
- Department
of Life Sciences, Imperial College London, London, SW7 2AZ, U.K.
| | - Molly M. Stevens
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical
Engineering, Imperial College London, London, SW7 2AZ, U.K.
- Department
of Medical Biochemistry and Biophysics, Karolinska Institutet, SE-171 77 Stockholm, Sweden
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6
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Hanssen DAT, Penders J, Heijgele K, de Leede S, Mulder M, Bank LEA, Slaats MHC, Savelkoul PHM, van Loo IHM. Antibodies against SARS-CoV-2 after natural infection in healthcare workers and clinical characteristics as putative antibody production prediction. Journal of Clinical Virology Plus 2022; 2:100089. [PMID: 35755211 PMCID: PMC9213037 DOI: 10.1016/j.jcvp.2022.100089] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 05/21/2022] [Accepted: 06/06/2022] [Indexed: 12/03/2022] Open
Abstract
Introduction There is a need for detailed data on early antibody responses against SARS-CoV-2 as this may contribute to the prediction of the clinical course of COVID-19 and the optimization of convalescent plasma treatment. This study aims to gain insight into developing antibodies to SARS-CoV-2 in health care workers (HCWs) infected in the first wave of the SARS-CoV-2 pandemic in the Netherlands. Materials and methods In this retrospective analysis, sera from PCR-confirmed COVID-19 positive HCWs are included at the time of the initial PCR (T = 0, n = 95) and at least 21 days after the initial serum (T ≥ 21, n = 133). This study assesses correlations between qualitative total Ig, IgM, IgA, IgG, and quantitative anti-S-RBD antibody responses and participant characteristics. Results Higher Ct values were associated with higher antibody positivity rates for total Ig (OR 1.261 (95% CI 1.095–1.452)), IgM (OR 1.373 (95% CI 1.125–1.675)), and IgA (OR 1.222 (95% CI 1.013–1.475)). Gender was predictive of IgM and IgA antibody positivity rates at T = 0 (OR 0.018 (95% CI 0.001–0.268)) and (OR 0.070 (95% CI 0.008–0.646)). At T ≥ 21, a substantial proportion of HCWs developed IgM (103/133; 77.4%) and total Ig (128/133; 96.2%) antibodies. IgA and IgG seroconversions were observed in only 51.1% (67/131) and 55.7% (73/131) of HCWs. Anti-S-RBD responses were higher when the interval between onset of symptoms and sampling was longer. Conclusion The findings of this study give insight into early antibody responses and may have implications for the selection of convalescent plasma donors and the further development of monoclonal antibody treatment.
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Affiliation(s)
- D A T Hanssen
- Department of Medical Microbiology, infectious diseases & Infection prevention, Maastricht University Medical Center, the Netherlands
- Care and Primary Health Research Institute (CAPHRI), Maastricht University, the Netherlands
| | - J Penders
- Department of Medical Microbiology, infectious diseases & Infection prevention, Maastricht University Medical Center, the Netherlands
- Care and Primary Health Research Institute (CAPHRI), Maastricht University, the Netherlands
- NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University, the Netherlands
| | - K Heijgele
- Department of Medical Microbiology, infectious diseases & Infection prevention, Maastricht University Medical Center, the Netherlands
| | - S de Leede
- Department of Medical Microbiology, infectious diseases & Infection prevention, Maastricht University Medical Center, the Netherlands
| | - M Mulder
- Department of Medical Microbiology, infectious diseases & Infection prevention, Maastricht University Medical Center, the Netherlands
| | - L E A Bank
- Department of Medical Microbiology, infectious diseases & Infection prevention, Maastricht University Medical Center, the Netherlands
| | - M H C Slaats
- Department of Medical Microbiology, infectious diseases & Infection prevention, Maastricht University Medical Center, the Netherlands
| | - P H M Savelkoul
- Department of Medical Microbiology, infectious diseases & Infection prevention, Maastricht University Medical Center, the Netherlands
- Care and Primary Health Research Institute (CAPHRI), Maastricht University, the Netherlands
| | - I H M van Loo
- Department of Medical Microbiology, infectious diseases & Infection prevention, Maastricht University Medical Center, the Netherlands
- Care and Primary Health Research Institute (CAPHRI), Maastricht University, the Netherlands
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7
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Barriga HM, Pence IJ, Holme MN, Doutch JJ, Penders J, Nele V, Thomas MR, Carroni M, Stevens MM. Coupling Lipid Nanoparticle Structure and Automated Single-Particle Composition Analysis to Design Phospholipase-Responsive Nanocarriers. Adv Mater 2022; 34:e2200839. [PMID: 35358374 PMCID: PMC7615489 DOI: 10.1002/adma.202200839] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 03/11/2022] [Indexed: 06/14/2023]
Abstract
Lipid nanoparticles (LNPs) are versatile structures with tunable physicochemical properties that are ideally suited as a platform for vaccine delivery and RNA therapeutics. A key barrier to LNP rational design is the inability to relate composition and structure to intracellular processing and function. Here Single Particle Automated Raman Trapping Analysis (SPARTA) is combined with small-angle X-ray and neutron scattering (SAXS/SANS) techniques to link LNP composition with internal structure and morphology and to monitor dynamic LNP-phospholipase D (PLD) interactions. This analysis demonstrates that PLD, a key intracellular trafficking mediator, can access the entire LNP lipid membrane to generate stable, anionic LNPs. PLD activity on vesicles with matched amounts of enzyme substrate is an order of magnitude lower, indicating that the LNP lipid membrane structure can be used to control enzyme interactions. This represents an opportunity to design enzyme-responsive LNP solutions for stimuli-responsive delivery and diseases where PLD is dysregulated.
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Affiliation(s)
- Hanna M.G. Barriga
- Department of Medical Biochemistry and Biophysics Karolinska Institutet, Stockholm SE-171 77, Sweden
| | - Isaac J. Pence
- Department of Materials, Department of Bioengineering,and Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, UK
| | - Margaret N. Holme
- Department of Medical Biochemistry and Biophysics Karolinska Institutet, Stockholm SE-171 77, Sweden
| | - James J. Doutch
- ISIS Neutron and Muon Source, STFC, Rutherford Appleton Laboratory Didcot OX11 ODE, UK
| | - Jelle Penders
- Department of Materials, Department of Bioengineering,and Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, UK
| | - Valeria Nele
- Department of Materials, Department of Bioengineering,and Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, UK
| | - Michael R. Thomas
- Department of Materials, Department of Bioengineering,and Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, UK
| | - Marta Carroni
- Department of Biochemistry and Biophysics, Science for Life Laboratory Stockholm University, Stockholm 171 65, Sweden
| | - Molly M. Stevens
- Department of Medical Biochemistry and Biophysics Karolinska Institutet, Stockholm SE-171 77, Sweden
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8
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Penders J, Nagelkerke A, Cunnane EM, Pedersen SV, Pence IJ, Coombes RC, Stevens MM. Single Particle Automated Raman Trapping Analysis of Breast Cancer Cell-Derived Extracellular Vesicles as Cancer Biomarkers. ACS Nano 2021; 15:18192-18205. [PMID: 34735133 PMCID: PMC9286313 DOI: 10.1021/acsnano.1c07075] [Citation(s) in RCA: 51] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Extracellular vesicles (EVs) secreted by cancer cells provide an important insight into cancer biology and could be leveraged to enhance diagnostics and disease monitoring. This paper details a high-throughput label-free extracellular vesicle analysis approach to study fundamental EV biology, toward diagnosis and monitoring of cancer in a minimally invasive manner and with the elimination of interpreter bias. We present the next generation of our single particle automated Raman trapping analysis─SPARTA─system through the development of a dedicated standalone device optimized for single particle analysis of EVs. Our visualization approach, dubbed dimensional reduction analysis (DRA), presents a convenient and comprehensive method of comparing multiple EV spectra. We demonstrate that the dedicated SPARTA system can differentiate between cancer and noncancer EVs with a high degree of sensitivity and specificity (>95% for both). We further show that the predictive ability of our approach is consistent across multiple EV isolations from the same cell types. Detailed modeling reveals accurate classification between EVs derived from various closely related breast cancer subtypes, further supporting the utility of our SPARTA-based approach for detailed EV profiling.
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Affiliation(s)
- Jelle Penders
- Department
of Materials, Imperial College London, London SW7 2AZ, United Kingdom
- Department
of Bioengineering, Imperial College London, London SW7 2AZ, United Kingdom
- Institute
of Biomedical Engineering, Imperial College
London, London SW7 2AZ, United Kingdom
| | - Anika Nagelkerke
- Department
of Materials, Imperial College London, London SW7 2AZ, United Kingdom
- Department
of Bioengineering, Imperial College London, London SW7 2AZ, United Kingdom
- Institute
of Biomedical Engineering, Imperial College
London, London SW7 2AZ, United Kingdom
| | - Eoghan M. Cunnane
- Department
of Materials, Imperial College London, London SW7 2AZ, United Kingdom
- Department
of Bioengineering, Imperial College London, London SW7 2AZ, United Kingdom
- Institute
of Biomedical Engineering, Imperial College
London, London SW7 2AZ, United Kingdom
| | - Simon V. Pedersen
- Department
of Materials, Imperial College London, London SW7 2AZ, United Kingdom
- Department
of Bioengineering, Imperial College London, London SW7 2AZ, United Kingdom
- Institute
of Biomedical Engineering, Imperial College
London, London SW7 2AZ, United Kingdom
| | - Isaac J. Pence
- Department
of Materials, Imperial College London, London SW7 2AZ, United Kingdom
- Department
of Bioengineering, Imperial College London, London SW7 2AZ, United Kingdom
- Institute
of Biomedical Engineering, Imperial College
London, London SW7 2AZ, United Kingdom
| | - R. Charles Coombes
- Department
of Surgery and Cancer, Hammersmith Hospital, Imperial College, London W120HS, United Kingdom
| | - Molly M. Stevens
- Department
of Materials, Imperial College London, London SW7 2AZ, United Kingdom
- Department
of Bioengineering, Imperial College London, London SW7 2AZ, United Kingdom
- Institute
of Biomedical Engineering, Imperial College
London, London SW7 2AZ, United Kingdom
- E-mail:
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9
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Becce M, Klöckner A, Higgins SG, Penders J, Hachim D, Bashor CJ, Edwards AM, Stevens MM. Assessing the impact of silicon nanowires on bacterial transformation and viability of Escherichia coli. J Mater Chem B 2021; 9:4906-4914. [PMID: 34100486 PMCID: PMC8221286 DOI: 10.1039/d0tb02762f] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Accepted: 05/25/2021] [Indexed: 11/21/2022]
Abstract
We investigated the biomaterial interface between the bacteria Escherichia coli DH5α and silicon nanowire patterned surfaces. We optimised the engineering of silicon nanowire coated surfaces using metal-assisted chemical etching. Using a combination of focussed ion beam scanning electron microscopy, and cell viability and transformation assays, we found that with increasing interfacing force, cell viability decreases, as a result of increasing cell rupture. However, despite this aggressive interfacing regime, a proportion of the bacterial cell population remains viable. We found that the silicon nanowires neither resulted in complete loss of cell viability nor partial membrane disruption and corresponding DNA plasmid transformation. Critically, assay choice was observed to be important, as a reduction-based metabolic reagent was found to yield false-positive results on the silicon nanowire substrate. We discuss the implications of these results for the future design and assessment of bacteria-nanostructure interfacing experiments.
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Affiliation(s)
- Michele Becce
- Department of Materials, Imperial College LondonLondonUK
- Department of Bioengineering, Imperial College LondonLondonUK
- Institute of Biomedical Engineering, Imperial College LondonLondonUK
| | - Anna Klöckner
- Department of Materials, Imperial College LondonLondonUK
- Department of Bioengineering, Imperial College LondonLondonUK
- Institute of Biomedical Engineering, Imperial College LondonLondonUK
- MRC Centre for Molecular Bacteriology and Infection, Imperial College LondonLondonUK
| | - Stuart G. Higgins
- Department of Materials, Imperial College LondonLondonUK
- Department of Bioengineering, Imperial College LondonLondonUK
- Institute of Biomedical Engineering, Imperial College LondonLondonUK
| | - Jelle Penders
- Department of Materials, Imperial College LondonLondonUK
- Department of Bioengineering, Imperial College LondonLondonUK
- Institute of Biomedical Engineering, Imperial College LondonLondonUK
| | - Daniel Hachim
- Department of Materials, Imperial College LondonLondonUK
- Department of Bioengineering, Imperial College LondonLondonUK
- Institute of Biomedical Engineering, Imperial College LondonLondonUK
| | - Caleb J. Bashor
- Department of Bioengineering, Rice UniversityHoustonTexasUSA
| | - Andrew M. Edwards
- MRC Centre for Molecular Bacteriology and Infection, Imperial College LondonLondonUK
| | - Molly M. Stevens
- Department of Materials, Imperial College LondonLondonUK
- Department of Bioengineering, Imperial College LondonLondonUK
- Institute of Biomedical Engineering, Imperial College LondonLondonUK
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10
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Guagliardo R, Herman L, Penders J, Zamborlin A, De Keersmaecker H, Van de Vyver T, Verstraeten S, Merckx P, Mingeot-Leclercq MP, Echaide M, Pérez-Gil J, Stevens MM, De Smedt SC, Raemdonck K. Surfactant Protein B Promotes Cytosolic SiRNA Delivery by Adopting a Virus-like Mechanism of Action. ACS Nano 2021; 15:8095-8109. [PMID: 33724778 DOI: 10.1021/acsnano.0c04489] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
RNA therapeutics are poised to revolutionize medicine. To unlock the full potential of RNA drugs, safe and efficient (nano)formulations to deliver them inside target cells are required. Endosomal sequestration of nanocarriers represents a major bottleneck in nucleic acid delivery. Gaining more detailed information on the intracellular behavior of RNA nanocarriers is crucial to rationally develop delivery systems with improved therapeutic efficiency. Surfactant protein B (SP-B) is a key component of pulmonary surfactant (PS), essential for mammalian breathing. In contrast to the general belief that PS should be regarded as a barrier for inhaled nanomedicines, we recently discovered the ability of SP-B to promote gene silencing by siRNA-loaded and lipid-coated nanogels. However, the mechanisms governing this process are poorly understood. The major objective of this work was to obtain mechanistic insights into the SP-B-mediated cellular delivery of siRNA. To this end, we combined siRNA knockdown experiments, confocal microscopy, and focused ion beam scanning electron microscopy imaging in an in vitro non-small-cell lung carcinoma model with lipid mixing assays on vesicles that mimic the composition of (intra)cellular membranes. Our work highlights a strong correlation between SP-B-mediated fusion with anionic endosomal membranes and cytosolic siRNA delivery, a mode of action resembling that of certain viruses and virus-derived cell-penetrating peptides. Building on these gained insights, we optimized the SP-B proteolipid composition, which dramatically improved delivery efficiency. Altogether, our work provides a mechanistic understanding of SP-B-induced perturbation of intracellular membranes, offering opportunities to fuel the rational design of SP-B-inspired RNA nanoformulations for inhalation therapy.
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Affiliation(s)
- Roberta Guagliardo
- Ghent Research Group on Nanomedicines, Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium
| | - Lore Herman
- Ghent Research Group on Nanomedicines, Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium
| | - Jelle Penders
- Department of Materials, Department of Bioengineering and Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, U.K
| | - Agata Zamborlin
- Ghent Research Group on Nanomedicines, Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium
| | - Herlinde De Keersmaecker
- Ghent Research Group on Nanomedicines, Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium
- Centre for Advanced Light Microscopy, Ghent University, 9000 Ghent, Belgium
| | - Thijs Van de Vyver
- Ghent Research Group on Nanomedicines, Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium
| | - Sandrine Verstraeten
- Université Catholique de Louvain, Louvain Drug Research Institute, Pharmacologie Cellulaire et Moléculaire, Avenue E. Mounier 73, UCL B1.73.05, 1200 Brussels, Belgium
| | - Pieterjan Merckx
- Ghent Research Group on Nanomedicines, Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium
| | - Marie-Paule Mingeot-Leclercq
- Université Catholique de Louvain, Louvain Drug Research Institute, Pharmacologie Cellulaire et Moléculaire, Avenue E. Mounier 73, UCL B1.73.05, 1200 Brussels, Belgium
| | - Mercedes Echaide
- Departamento de Bioquímica y Biología Molecular, Facultad de Biologia, and Research Institute Hospital 12 de Octubre, Universidad Complutense, José Antonio Novais 12, 28040 Madrid, Spain
| | - Jesús Pérez-Gil
- Departamento de Bioquímica y Biología Molecular, Facultad de Biologia, and Research Institute Hospital 12 de Octubre, Universidad Complutense, José Antonio Novais 12, 28040 Madrid, Spain
| | - Molly M Stevens
- Department of Materials, Department of Bioengineering and Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, U.K
| | - Stefaan C De Smedt
- Ghent Research Group on Nanomedicines, Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium
| | - Koen Raemdonck
- Ghent Research Group on Nanomedicines, Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium
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11
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Potter M, Najer A, Klöckner A, Zhang S, Holme MN, Nele V, Che J, Massi L, Penders J, Saunders C, Doutch JJ, Edwards AM, Ces O, Stevens MM. Controlled Dendrimersome Nanoreactor System for Localized Hypochlorite-Induced Killing of Bacteria. ACS Nano 2020; 14:17333-17353. [PMID: 33290039 PMCID: PMC7760217 DOI: 10.1021/acsnano.0c07459] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Accepted: 11/23/2020] [Indexed: 05/20/2023]
Abstract
Antibiotic resistance is a serious global health problem necessitating new bactericidal approaches such as nanomedicines. Dendrimersomes (DSs) have recently become a valuable alternative nanocarrier to polymersomes and liposomes due to their molecular definition and synthetic versatility. Despite this, their biomedical application is still in its infancy. Inspired by the localized antimicrobial function of neutrophil phagosomes and the versatility of DSs, a simple three-component DS-based nanoreactor with broad-spectrum bactericidal activity is presented. This was achieved by encapsulation of glucose oxidase (GOX) and myeloperoxidase (MPO) within DSs (GOX-MPO-DSs), self-assembled from an amphiphilic Janus dendrimer, that possesses a semipermeable membrane. By external addition of glucose to GOX-MPO-DS, the production of hypochlorite (-OCl), a highly potent antimicrobial, by the enzymatic cascade was demonstrated. This cascade nanoreactor yielded a potent bactericidal effect against two important multidrug resistant pathogens, Staphylococcus aureus (S. aureus) and Pseudomonas aeruginosa (P. aeruginosa), not observed for H2O2 producing nanoreactors, GOX-DS. The production of highly reactive species such as -OCl represents a harsh bactericidal approach that could also be cytotoxic to mammalian cells. This necessitates the development of strategies for activating -OCl production in a localized manner in response to a bacterial stimulus. One option of locally releasing sufficient amounts of substrate using a bacterial trigger (released toxins) was demonstrated with lipidic glucose-loaded giant unilamellar vesicles (GUVs), envisioning, e.g., implant surface modification with nanoreactors and GUVs for localized production of bactericidal agents in the presence of bacterial growth.
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Affiliation(s)
- Michael Potter
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical
Engineering, Imperial College London, London SW7 2AZ, U.K.
- Department
of Chemistry and Institute of Chemical Biology, Imperial College London, Molecular Sciences Research Hub, London W12 0BZ, U.K.
| | - Adrian Najer
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical
Engineering, Imperial College London, London SW7 2AZ, U.K.
| | - Anna Klöckner
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical
Engineering, Imperial College London, London SW7 2AZ, U.K.
- MRC
Centre for Molecular Bacteriology and Infection, Imperial College London, London SW7 2AZ, U.K.
| | - Shaodong Zhang
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical
Engineering, Imperial College London, London SW7 2AZ, U.K.
| | - Margaret N. Holme
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical
Engineering, Imperial College London, London SW7 2AZ, U.K.
- Department
of Medical Biochemistry and Biophysics, Karolinska Institutet, SE-171 77 Stockholm, Sweden
| | - Valeria Nele
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical
Engineering, Imperial College London, London SW7 2AZ, U.K.
| | - Junyi Che
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical
Engineering, Imperial College London, London SW7 2AZ, U.K.
| | - Lucia Massi
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical
Engineering, Imperial College London, London SW7 2AZ, U.K.
| | - Jelle Penders
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical
Engineering, Imperial College London, London SW7 2AZ, U.K.
| | - Catherine Saunders
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical
Engineering, Imperial College London, London SW7 2AZ, U.K.
| | - James J. Doutch
- Rutherford
Appleton Laboratory, ISIS Neutron and Muon
Source, STFC, Didcot OX11 ODE, U.K.
| | - Andrew M. Edwards
- MRC
Centre for Molecular Bacteriology and Infection, Imperial College London, London SW7 2AZ, U.K.
| | - Oscar Ces
- Department
of Chemistry and Institute of Chemical Biology, Imperial College London, Molecular Sciences Research Hub, London W12 0BZ, U.K.
| | - Molly M. Stevens
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical
Engineering, Imperial College London, London SW7 2AZ, U.K.
- Department
of Medical Biochemistry and Biophysics, Karolinska Institutet, SE-171 77 Stockholm, Sweden
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12
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van Best N, Rolle-Kampczyk U, Schaap FG, Basic M, Olde Damink SWM, Bleich A, Savelkoul PHM, von Bergen M, Penders J, Hornef MW. Bile acids drive the newborn's gut microbiota maturation. Nat Commun 2020; 11:3692. [PMID: 32703946 PMCID: PMC7378201 DOI: 10.1038/s41467-020-17183-8] [Citation(s) in RCA: 84] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2019] [Accepted: 06/12/2020] [Indexed: 02/06/2023] Open
Abstract
Following birth, the neonatal intestine is exposed to maternal and environmental bacteria that successively form a dense and highly dynamic intestinal microbiota. Whereas the effect of exogenous factors has been extensively investigated, endogenous, host-mediated mechanisms have remained largely unexplored. Concomitantly with microbial colonization, the liver undergoes functional transition from a hematopoietic organ to a central organ of metabolic regulation and immune surveillance. The aim of the present study was to analyze the influence of the developing hepatic function and liver metabolism on the early intestinal microbiota. Here, we report on the characterization of the colonization dynamics and liver metabolism in the murine gastrointestinal tract (n = 6-10 per age group) using metabolomic and microbial profiling in combination with multivariate analysis. We observed major age-dependent microbial and metabolic changes and identified bile acids as potent drivers of the early intestinal microbiota maturation. Consistently, oral administration of tauro-cholic acid or β-tauro-murocholic acid to newborn mice (n = 7-14 per group) accelerated postnatal microbiota maturation.
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Affiliation(s)
- N van Best
- Institute of Medical Microbiology, RWTH University Hospital Aachen, RWTH University, Aachen, Germany
- Department of Medical Microbiology, School of Nutrition and Translational Research in Metabolism (NUTRIM), Maastricht University, Maastricht, The Netherlands
| | - U Rolle-Kampczyk
- Department of Molecular Systems Biology, UFZ-Helmholtz Centre for Environmental Research, Leipzig, Germany
| | - F G Schaap
- Department of General Surgery, NUTRIM, Maastricht University, Maastricht, The Netherlands
- Department of General, Visceral and Transplantation Surgery, RWTH University Hospital Aachen, Aachen, Germany
| | - M Basic
- Institute for Laboratory Animal Science, Hannover Medical School, Hannover, Germany
| | - S W M Olde Damink
- Department of General Surgery, NUTRIM, Maastricht University, Maastricht, The Netherlands
- Department of General, Visceral and Transplantation Surgery, RWTH University Hospital Aachen, Aachen, Germany
| | - A Bleich
- Institute for Laboratory Animal Science, Hannover Medical School, Hannover, Germany
| | - P H M Savelkoul
- Department of Medical Microbiology, School of Nutrition and Translational Research in Metabolism (NUTRIM), Maastricht University, Maastricht, The Netherlands
| | - M von Bergen
- Department of Molecular Systems Biology, UFZ-Helmholtz Centre for Environmental Research, Leipzig, Germany
- Institute of Biochemistry, University of Leipzig, Leipzig, Germany
| | - J Penders
- Department of Medical Microbiology, School of Nutrition and Translational Research in Metabolism (NUTRIM), Maastricht University, Maastricht, The Netherlands.
- School of Public Health and Primary Care, Maastricht University, Maastricht, The Netherlands.
| | - M W Hornef
- Institute of Medical Microbiology, RWTH University Hospital Aachen, RWTH University, Aachen, Germany.
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13
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Horgan CC, Nagelkerke A, Whittaker TE, Nele V, Massi L, Kauscher U, Penders J, Bergholt MS, Hood SR, Stevens MM. Molecular imaging of extracellular vesicles in vitro via Raman metabolic labelling. J Mater Chem B 2020; 8:4447-4459. [PMID: 32373878 PMCID: PMC7610785 DOI: 10.1039/d0tb00620c] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Extracellular vesicles (EVs) are biologically-derived nanovectors important for intercellular communication and trafficking. As such, EVs show great promise as disease biomarkers and therapeutic drug delivery vehicles. However, despite the rapidly growing interest in EVs, understanding of the biological mechanisms that govern their biogenesis, secretion, and uptake remains poor. Advances in this field have been hampered by both the complex biological origins of EVs, which make them difficult to isolate and identify, and a lack of suitable imaging techniques to properly study their diverse biological roles. Here, we present a new strategy for simultaneous quantitative in vitro imaging and molecular characterisation of EVs in 2D and 3D based on Raman spectroscopy and metabolic labelling. Deuterium, in the form of deuterium oxide (D2O), deuterated choline chloride (d-Chol), or deuterated d-glucose (d-Gluc), is metabolically incorporated into EVs through the growth of parent cells on medium containing one of these compounds. Isolated EVs are thus labelled with deuterium, which acts as a bio-orthogonal Raman-active tag for direct Raman identification of EVs when introduced to unlabelled cell cultures. Metabolic deuterium incorporation demonstrates no apparent adverse effects on EV secretion, marker expression, morphology, or global composition, indicating its capacity for minimally obstructive EV labelling. As such, our metabolic labelling strategy could provide integral insights into EV biocomposition and trafficking. This approach has the potential to enable a deeper understanding of many of the biological mechanisms underpinning EVs, with profound implications for the design of EVs as therapeutic delivery vectors and applications as disease biomarkers.
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Affiliation(s)
- Conor C Horgan
- Department of Materials, Imperial College London, London SW7 2AZ, UK. and Department of Bioengineering, Imperial College London, London SW7 2AZ, UK and Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, UK
| | - Anika Nagelkerke
- Department of Materials, Imperial College London, London SW7 2AZ, UK. and Department of Bioengineering, Imperial College London, London SW7 2AZ, UK and Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, UK
| | - Thomas E Whittaker
- Department of Materials, Imperial College London, London SW7 2AZ, UK. and Department of Bioengineering, Imperial College London, London SW7 2AZ, UK and Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, UK
| | - Valeria Nele
- Department of Materials, Imperial College London, London SW7 2AZ, UK. and Department of Bioengineering, Imperial College London, London SW7 2AZ, UK and Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, UK
| | - Lucia Massi
- Department of Materials, Imperial College London, London SW7 2AZ, UK. and Department of Bioengineering, Imperial College London, London SW7 2AZ, UK and Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, UK
| | - Ulrike Kauscher
- Department of Materials, Imperial College London, London SW7 2AZ, UK. and Department of Bioengineering, Imperial College London, London SW7 2AZ, UK and Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, UK
| | - Jelle Penders
- Department of Materials, Imperial College London, London SW7 2AZ, UK. and Department of Bioengineering, Imperial College London, London SW7 2AZ, UK and Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, UK
| | - Mads S Bergholt
- Department of Materials, Imperial College London, London SW7 2AZ, UK. and Department of Bioengineering, Imperial College London, London SW7 2AZ, UK and Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, UK
| | - Steve R Hood
- GSK Medicines Research Centre, Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, UK
| | - Molly M Stevens
- Department of Materials, Imperial College London, London SW7 2AZ, UK. and Department of Bioengineering, Imperial College London, London SW7 2AZ, UK and Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, UK
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14
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Seong H, Higgins SG, Penders J, Armstrong JPK, Crowder SW, Moore AC, Sero JE, Becce M, Stevens MM. Size-Tunable Nanoneedle Arrays for Influencing Stem Cell Morphology, Gene Expression, and Nuclear Membrane Curvature. ACS Nano 2020; 14:5371-5381. [PMID: 32330008 PMCID: PMC7254837 DOI: 10.1021/acsnano.9b08689] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2019] [Accepted: 04/24/2020] [Indexed: 05/16/2023]
Abstract
High-aspect-ratio nanostructures have emerged as versatile platforms for intracellular sensing and biomolecule delivery. Here, we present a microfabrication approach in which a combination of reactive ion etching protocols were used to produce high-aspect-ratio, nondegradable silicon nanoneedle arrays with tip diameters that could be finely tuned between 20 and 700 nm. We used these arrays to guide the long-term culture of human mesenchymal stem cells (hMSCs). Notably, we used changes in the nanoneedle tip diameter to control the morphology, nuclear size, and F-actin alignment of interfaced hMSCs and to regulate the expression of nuclear lamina genes, Yes-associated protein (YAP) target genes, and focal adhesion genes. These topography-driven changes were attributed to signaling by Rho-family GTPase pathways, differences in the effective stiffness of the nanoneedle arrays, and the degree of nuclear membrane impingement, with the latter clearly visualized using focused ion beam scanning electron microscopy (FIB-SEM). Our approach to design high-aspect-ratio nanostructures will be broadly applicable to design biomaterials and biomedical devices used for long-term cell stimulation and monitoring.
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Affiliation(s)
- Hyejeong Seong
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical Engineering, Imperial College London, Prince Consort Road, SW7 2AZ, London, U.K.
| | - Stuart G. Higgins
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical Engineering, Imperial College London, Prince Consort Road, SW7 2AZ, London, U.K.
| | - Jelle Penders
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical Engineering, Imperial College London, Prince Consort Road, SW7 2AZ, London, U.K.
| | - James P. K. Armstrong
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical Engineering, Imperial College London, Prince Consort Road, SW7 2AZ, London, U.K.
| | - Spencer W. Crowder
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical Engineering, Imperial College London, Prince Consort Road, SW7 2AZ, London, U.K.
| | - Axel C. Moore
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical Engineering, Imperial College London, Prince Consort Road, SW7 2AZ, London, U.K.
| | - Julia E. Sero
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical Engineering, Imperial College London, Prince Consort Road, SW7 2AZ, London, U.K.
| | - Michele Becce
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical Engineering, Imperial College London, Prince Consort Road, SW7 2AZ, London, U.K.
| | - Molly M. Stevens
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical Engineering, Imperial College London, Prince Consort Road, SW7 2AZ, London, U.K.
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15
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Kauscher U, Penders J, Nagelkerke A, Holme MN, Nele V, Massi L, Gopal S, Whittaker TE, Stevens MM. Gold Nanocluster Extracellular Vesicle Supraparticles: Self-Assembled Nanostructures for Three-Dimensional Uptake Visualization. Langmuir 2020; 36:3912-3923. [PMID: 32250120 PMCID: PMC7161082 DOI: 10.1021/acs.langmuir.9b03479] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Extracellular vesicles (EVs) are secreted by the vast majority of cells and are being intensively studied due to their emerging involvement in a variety of cellular communication processes. However, the study of their cellular uptake and fate has been hampered by difficulty in imaging EVs against the cellular background. Here, we show that EVs combined with hydrophobic gold nanoclusters (AuNCs) can self-assemble into supraparticles, offering an excellent labeling strategy for high-resolution electron microscopic imaging in vitro. We have tracked and visualized the reuptake of breast cancer cell-derived EV AuNC supraparticles into their parent cells, from early endocytosis to lysosomal degradation, using focused ion beam-scanning electron microscopy (FIB-SEM). The presence of gold within the EVs and lysosomes was confirmed via DF-STEM EDX analysis of lift-out sections. The demonstrated formation of AuNC EV supraparticles will facilitate future applications in EV imaging as well as the EV-assisted cellular delivery of AuNCs.
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Affiliation(s)
- Ulrike Kauscher
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, United Kingdom
| | - Jelle Penders
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, United Kingdom
| | - Anika Nagelkerke
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, United Kingdom
- University
of Groningen, Groningen Research Institute
of Pharmacy, Pharmaceutical Analysis,
POB 196 XB20, NL-9700 AD Groningen, The Netherlands
| | - Margaret N. Holme
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, United Kingdom
- Department
of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm SE-171 77, Sweden
| | - Valeria Nele
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, United Kingdom
| | - Lucia Massi
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, United Kingdom
| | - Sahana Gopal
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, United Kingdom
| | - Thomas E. Whittaker
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, United Kingdom
| | - Molly M. Stevens
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, United Kingdom
- Department
of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm SE-171 77, Sweden
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16
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Björnmalm M, Wong LM, Wojciechowski JP, Penders J, Horgan CC, Booth MA, Martin NG, Sattler S, Stevens MM. In vivo biocompatibility and immunogenicity of metal-phenolic gelation. Chem Sci 2019; 10:10179-10194. [PMID: 31700596 PMCID: PMC6837883 DOI: 10.1039/c9sc03325d] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Accepted: 09/13/2019] [Indexed: 12/19/2022] Open
Abstract
In vivo forming hydrogels are of interest for diverse biomedical applications due to their ease-of-use and minimal invasiveness and therefore high translational potential. Supramolecular hydrogels that can be assembled using metal-phenolic coordination of naturally occurring polyphenols and group IV metal ions (e.g. TiIV or ZrIV) provide a versatile and robust platform for engineering such materials. However, the in situ formation and in vivo response to this new class of materials has not yet been reported. Here, we demonstrate that metal-phenolic supramolecular gelation occurs successfully in vivo and we investigate the host response to the material over 14 weeks. The TiIV-tannic acid materials form stable gels that are well-tolerated following subcutaneous injection. Histology reveals a mild foreign body reaction, and titanium biodistribution studies show low accumulation in distal tissues. Compared to poloxamer-based hydrogels (commonly used for in vivo gelation), TiIV-tannic acid materials show a substantially improved in vitro drug release profile for the corticosteroid dexamethasone (from <1 day to >10 days). These results provide essential in vivo characterization for this new class of metal-phenolic hydrogels, and highlight their potential suitability for biomedical applications in areas such as drug delivery and regenerative medicine.
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Affiliation(s)
- Mattias Björnmalm
- Department of Materials
, Department of Bioengineering
, Institute of Biomedical Engineering
, Imperial College London
,
London SW7 2AZ
, UK
.
| | - Lok Man Wong
- National Heart and Lung Institute
, Imperial College London
,
London W12 0NN
, UK
.
| | - Jonathan P. Wojciechowski
- Department of Materials
, Department of Bioengineering
, Institute of Biomedical Engineering
, Imperial College London
,
London SW7 2AZ
, UK
.
| | - Jelle Penders
- Department of Materials
, Department of Bioengineering
, Institute of Biomedical Engineering
, Imperial College London
,
London SW7 2AZ
, UK
.
| | - Conor C. Horgan
- Department of Materials
, Department of Bioengineering
, Institute of Biomedical Engineering
, Imperial College London
,
London SW7 2AZ
, UK
.
| | - Marsilea A. Booth
- Department of Materials
, Department of Bioengineering
, Institute of Biomedical Engineering
, Imperial College London
,
London SW7 2AZ
, UK
.
| | - Nicholas G. Martin
- Trace Element Laboratory
, North West London Pathology
,
Charing Cross Hospital
, London W6 8RF
, UK
| | - Susanne Sattler
- National Heart and Lung Institute
, Imperial College London
,
London W12 0NN
, UK
.
| | - Molly M. Stevens
- Department of Materials
, Department of Bioengineering
, Institute of Biomedical Engineering
, Imperial College London
,
London SW7 2AZ
, UK
.
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17
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Gopal S, Chiappini C, Penders J, Leonardo V, Seong H, Rothery S, Korchev Y, Shevchuk A, Stevens MM. Porous Silicon Nanoneedles Modulate Endocytosis to Deliver Biological Payloads. Adv Mater 2019; 31:e1806788. [PMID: 30680803 PMCID: PMC6606440 DOI: 10.1002/adma.201806788] [Citation(s) in RCA: 75] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Revised: 01/09/2019] [Indexed: 05/18/2023]
Abstract
Owing to their ability to efficiently deliver biological cargo and sense the intracellular milieu, vertical arrays of high aspect ratio nanostructures, known as nanoneedles, are being developed as minimally invasive tools for cell manipulation. However, little is known of the mechanisms of cargo transfer across the cell membrane-nanoneedle interface. In particular, the contributions of membrane piercing, modulation of membrane permeability and endocytosis to cargo transfer remain largely unexplored. Here, combining state-of-the-art electron and scanning ion conductance microscopy with molecular biology techniques, it is shown that porous silicon nanoneedle arrays concurrently stimulate independent endocytic pathways which contribute to enhanced biomolecule delivery into human mesenchymal stem cells. Electron microscopy of the cell membrane at nanoneedle sites shows an intact lipid bilayer, accompanied by an accumulation of clathrin-coated pits and caveolae. Nanoneedles enhance the internalization of biomolecular markers of endocytosis, highlighting the concurrent activation of caveolae- and clathrin-mediated endocytosis, alongside macropinocytosis. These events contribute to the nanoneedle-mediated delivery (nanoinjection) of nucleic acids into human stem cells, which distribute across the cytosol and the endolysosomal system. This data extends the understanding of how nanoneedles modulate biological processes to mediate interaction with the intracellular space, providing indications for the rational design of improved cell-manipulation technologies.
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Affiliation(s)
- Sahana Gopal
- Department of Medicine, Imperial College London, Hammersmith Hospital, Du Cane Road, London, W12 0NN, UK
- Department of Materials, Royal School of Mines, Prince Consort Road, London, SW7 2AZ, UK
| | - Ciro Chiappini
- Department of Materials, Royal School of Mines, Prince Consort Road, London, SW7 2AZ, UK
| | - Jelle Penders
- Department of Materials, Royal School of Mines, Prince Consort Road, London, SW7 2AZ, UK
| | - Vincent Leonardo
- Department of Materials, Royal School of Mines, Prince Consort Road, London, SW7 2AZ, UK
| | - Hyejeong Seong
- Department of Materials, Royal School of Mines, Prince Consort Road, London, SW7 2AZ, UK
| | - Stephen Rothery
- Facility for Imaging by Light Microscopy, Imperial College London, Sir Alexander Fleming Building, Exhibition Road, London, SW7 2BB, UK
| | - Yuri Korchev
- Department of Medicine, Imperial College London, Hammersmith Hospital, Du Cane Road, London, W12 0NN, UK
| | - Andrew Shevchuk
- Department of Medicine, Imperial College London, Hammersmith Hospital, Du Cane Road, London, W12 0NN, UK
| | - Molly M Stevens
- Department of Materials, Royal School of Mines, Prince Consort Road, London, SW7 2AZ, UK
- Department of Bioengineering, Royal School of Mines, Prince Consort Road, London, SW7 2AZ, UK
- Institute of Biomedical Engineering, Imperial College London, Royal School of Mines, Prince Consort Road, London, SW7 2AZ, UK
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18
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Kamenshchikova A, Wolffs PFG, Hoebe CJ, Penders J, Horstman K. Complex narratives of health, stigma and control: Antimicrobial resistance screening among non-hospitalized refugees. Soc Sci Med 2018; 212:43-49. [PMID: 30005223 DOI: 10.1016/j.socscimed.2018.07.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Revised: 06/27/2018] [Accepted: 07/06/2018] [Indexed: 01/23/2023]
Abstract
Antimicrobial resistance (AMR) is often presented as a major public health problem globally. Screening for AMR usually takes place in clinical settings. Recent developments in microbiology stimulated a series of studies focusing on AMR in communities, and particularly in travelers (any mobile individual), which was argued to be important for identifying potential public health risks. Against this background, microbiologists have become interested in non-hospitalized refugees as one of the traveler groups. However, this attention to refugees has provoked some professional debates on potential stigmatization of refugees as dangerous "others". To contribute to these debates, and to explore the idea of AMR screening of non-hospitalized refugees from different perspectives, we conducted a qualitative study among four groups of stakeholders who were chosen because of their associations with potential microbiological screening: microbiologists, public health physicians, public health nurses, and refugees. The study took place in a Dutch city from June to August 2016 and had 17 participants: five microbiologists, two public health nurses, four public health physicians, and six refugees. While microbiologists and public health physicians demonstrated a de-contextualized biomedical narrative in arguing that AMR screening among non-hospitalized refugees could be important for scientific research as well as for AMR prevention in communities, public health nurses displayed a more contextualized narrative bringing the benefits for individuals at the center and indicating that screening exclusively among refugees may provoke fear and stigmatization. Refugees were rather positive about AMR screening but stressed that it should particularly contribute to their individual health. We conclude that to design AMR prevention strategies, it is important to consider the complex meanings of AMR screening, and to design these strategies as a process of co-production by diverse stakeholders, including the target populations.
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Affiliation(s)
- A Kamenshchikova
- Department of Health, Ethics and Society, School of Public Health and Primary Care (CAPHRI), Maastricht University, Postbus 616, 6200, MD, Maastricht, the Netherlands; Research Centre for Policy Analysis and Studies of Technologies (PAST-Centre), National Research Tomsk State University, Tomsk, Russian Federation.
| | - P F G Wolffs
- Department of Medical Microbiology, School of Public Health and Primary Care (CAPHRI), Maastricht University Medical Center (MUMC+), Maastricht, the Netherlands
| | - C J Hoebe
- Department of Medical Microbiology, School of Public Health and Primary Care (CAPHRI), Maastricht University Medical Center (MUMC+), Maastricht, the Netherlands; Department of Sexual Health, Infectious Diseases and Environmental Health, South Limburg Public Health Service (GGD South Limburg), Heerlen, the Netherlands
| | - J Penders
- Department of Medical Microbiology, School of Public Health and Primary Care (CAPHRI), Maastricht University Medical Center (MUMC+), Maastricht, the Netherlands; Department of Medical Microbiology, School of Nutrition and Translational Research in Metabolism (NUTRIM), Maastricht University Medical Center (MUMC+), Maastricht, the Netherlands
| | - K Horstman
- Department of Health, Ethics and Society, School of Public Health and Primary Care (CAPHRI), Maastricht University, Postbus 616, 6200, MD, Maastricht, the Netherlands
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19
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20
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Penders J, Rajasekharan AK, Hulander M, Andersson M. In Situ Gold Nanoparticle Gradient Formation in a 3D Meso- and Macroporous Polymer Matrix. Macromol Rapid Commun 2017; 38. [PMID: 28671754 DOI: 10.1002/marc.201700231] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Revised: 05/22/2017] [Indexed: 11/10/2022]
Abstract
Herein, the development and characterization of a 3D gradient structure of gold nanoparticles is described. The gradient of gold nanoparticles is made in situ in a macroporous nonionic block copolymer hydrogel matrix, through gold ion diffusion control. The polymer provides a matrix for diffusion of gold ions, acts as a template for controlling nanoparticle growth, and facilitates the in situ reduction of gold ions to gold nanoparticles. A clear gradient in gold nanoparticles is observed across the 3D space of the polymer matrix using scanning electron microscopy, fluorescence microscopy, atomic force microscopy, and thermogravimetric analysis. The particle gradient is further functionalized with both hydrophobic and hydrophilic groups via thiol-gold linkage to demonstrate the ability to form gradients with different chemical functionalities. Using additive manufacturing, the polymer can also be printed as a porous network with possible applications for 3D cell culturing in, e.g., biomaterials research.
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Affiliation(s)
- Jelle Penders
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg, SE-41296, Sweden.,Department of Materials, Imperial College, London, SW7 2AZ, UK
| | - Anand K Rajasekharan
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg, SE-41296, Sweden
| | - Mats Hulander
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg, SE-41296, Sweden
| | - Martin Andersson
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg, SE-41296, Sweden
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21
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Most J, Goossens GH, Reijnders D, Canfora EE, Penders J, Blaak EE. Gut microbiota composition strongly correlates to peripheral insulin sensitivity in obese men but not in women. Benef Microbes 2017; 8:557-562. [PMID: 28618864 DOI: 10.3920/bm2016.0189] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [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: 12/21/2022]
Abstract
Gut microbiota composition may play an important role in the development of obesity-related comorbidities. However, only few studies have investigated gender-differences in microbiota composition and gender-specific associations between microbiota or microbial products and insulin sensitivity. Insulin sensitivity (hyperinsulinemic-euglycemic clamp), body composition (dual energy X-ray absorptiometry), substrate oxidation (indirect calorimetry), systemic inflammatory markers and microbiota composition (PCR) were determined in male (n=15) and female (n=14) overweight and obese subjects. Bacteroidetes/Firmicutes-ratio was higher in men than in women (P=0.001). Bacteroidetes/Firmicutes-ratio was inversely related to peripheral insulin sensitivity only in men (men: P=0.003, women: P=0.882). This association between Bacteroidetes/Firmicutes-ratio and peripheral insulin sensitivity did not change after adjustment for dietary fibre and saturated fat intake, body composition, fat oxidation and markers of inflammation. Bacteroidetes/Firmicutes-ratio was not associated with hepatic insulin sensitivity. Men and women differ in microbiota composition and its impact on insulin sensitivity, implying that women might be less sensitive to gut microbiota-induced metabolic aberrations than men. This trial was registered at clinicaltrials.gov as NCT02381145.
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Affiliation(s)
- J Most
- 1 Department of Human Biology, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Center+, P.O. Box 616, 6200 MD Maastricht, the Netherlands
| | - G H Goossens
- 1 Department of Human Biology, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Center+, P.O. Box 616, 6200 MD Maastricht, the Netherlands
| | - D Reijnders
- 1 Department of Human Biology, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Center+, P.O. Box 616, 6200 MD Maastricht, the Netherlands
| | - E E Canfora
- 1 Department of Human Biology, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Center+, P.O. Box 616, 6200 MD Maastricht, the Netherlands
| | - J Penders
- 2 Department of Medical Microbiology, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Center+, P.O. Box 616, 6200 MD Maastricht, the Netherlands
| | - E E Blaak
- 1 Department of Human Biology, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Center+, P.O. Box 616, 6200 MD Maastricht, the Netherlands
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22
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Affiliation(s)
- M Hornef
- Institute of Medical Microbiology, RWTH University Hospital, Aachen, Germany
| | - J Penders
- Department of Medical Microbiology, NUTRIM School of Nutrition and Translational Research in Metabolism & Caphri School for Public Health and Primary Care, Maastricht University Medical Centre, Maastricht, The Netherlands
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23
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Abstract
Gold nanoparticles (AuNPs) of various shapes (including spheres, stars and flowers), with similar dimensions, were synthesized and evaluated for their antibacterial effects toward Staphylococcus aureus, a bacterium responsible for numerous life-threatening infections worldwide. Optical growth curve measurements and Gompertz modeling showed significant AuNP shape- and concentration-dependent decreases in bacterial growth with increases in bacterial growth lag time. To evaluate prospective use in in vivo systems, the cytotoxicity of the same AuNPs was evaluated toward human dermal fibroblasts in vitro by 3-(4,5 dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium (MTS) viability assays and confocal microscopy. No indication of any mammalian cell toxicity or morphological effects was found. Additionally, it was observed that the AuNPs were readily internalized in fibroblasts after 4 days of incubation. Most importantly, the results of the present study showed that gold nanoflowers in particular possessed the most promising non-cytotoxic mammalian cell behavior with the greatest shape-dependent antibacterial activity-promising properties for their future investigation in a wide range of anti-infection applications.
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Affiliation(s)
- Jelle Penders
- Department of Chemical Engineering, Northeastern University, Boston, MA, USA.,Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Göteborg, Sweden
| | - Michelle Stolzoff
- Department of Bioengineering, Northeastern University, Boston, MA, USA
| | - Daniel J Hickey
- Department of Chemical Engineering, Northeastern University, Boston, MA, USA
| | - Martin Andersson
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Göteborg, Sweden
| | - Thomas J Webster
- Department of Chemical Engineering, Northeastern University, Boston, MA, USA
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24
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Aarnoutse R, de Vos-Geelen JMPGM, Penders J, Boerma EG, Warmerdam FARM, Goorts B, Olde Damink SWM, Soons Z, Rensen SSM, Smidt ML. Study protocol on the role of intestinal microbiota in colorectal cancer treatment: a pathway to personalized medicine 2.0. Int J Colorectal Dis 2017; 32:1077-1084. [PMID: 28444508 PMCID: PMC5486633 DOI: 10.1007/s00384-017-2819-3] [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] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 04/07/2017] [Indexed: 02/04/2023]
Abstract
PURPOSE Investigate in patients with metastatic and/or irresectable colorectal cancer treated with systemic treatment with capecitabine or TAS-102 whether: 1. Intestinal microbiota composition can act as a predictor for response. 2. Intestinal microbiota composition changes during systemic treatment and its relation to chemotoxicity. BACKGROUND Gut microbiota and host determinants evolve in symbiotic and dependent relationships resulting in a personal ecosystem. In vitro studies showed prolonged and increased response to 5-fluorouracil, a fluoropyrimidine, in the presence of a favorable microbiota composition. Capecitabine and TAS-102 are both fluoropyrimidines used for systemic treatment in colorectal cancer patients. METHODS An explorative prospective multicenter cohort study in the Maastricht University Medical Centre+ and Zuyderland Medical Centre will be performed in 66 patients. Before, during, and after three cycles of systemic treatment with capecitabine or TAS-102, fecal samples and questionnaires (concerning compliance and chemotoxicity) will be collected. The response will be measured by CT/MRI using RECIST-criteria. Fecal microbiota composition will be analyzed with 16S rRNA next-generation sequencing. The absolute bacterial abundance will be assessed with quantitative polymerase chain reaction. Multivariate analysis will be used for statistical analysis. CONCLUSIONS We aim to detect a microbiota composition that predicts if patients with metastatic and/or irresectable colorectal cancer will respond to systemic treatment and/or experience zero to limited chemotoxicity. If we are able to identify a favorable microbiota composition, fecal microbiota transplantation might be the low-burden alternative to chemotherapy switch in the future.
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Affiliation(s)
- R. Aarnoutse
- GROW-School for Oncology and Developmental Biology, Maastricht University Medical Centre, Universiteitssingel 40, 6229 ER Maastricht, the Netherlands ,Department of Surgery, Maastricht University Medical Centre, P. Debyelaan 25, 6229 HX Maastricht, the Netherlands
| | - J. M. P. G. M. de Vos-Geelen
- Department of Medical Oncology, Maastricht University Medical Centre, P. Debyelaan 25, 6229 HX Maastricht, the Netherlands
| | - J. Penders
- Department of Medical Microbiology, Maastricht University Medical Centre, P. Debyelaan 25, 6229 HX Maastricht, the Netherlands
| | - E. G. Boerma
- Department of Surgery, Zuyderland Medical Centre, Dr. H. van der Hoffplein 1, 6162 BG Geleen, the Netherlands
| | - F. A. R. M. Warmerdam
- Department of Medical Oncology, Zuyderland Medical Centre, Dr. H. van der Hoffplein 1, 6162 BG Geleen, the Netherlands
| | - B. Goorts
- GROW-School for Oncology and Developmental Biology, Maastricht University Medical Centre, Universiteitssingel 40, 6229 ER Maastricht, the Netherlands ,Department of Surgery, Maastricht University Medical Centre, P. Debyelaan 25, 6229 HX Maastricht, the Netherlands
| | - S. W. M. Olde Damink
- Department of Surgery, Maastricht University Medical Centre, P. Debyelaan 25, 6229 HX Maastricht, the Netherlands ,NUTRIM - School of Nutrition and Translational research In Metabolism, Maastricht University Medical Centre, Universiteitssingel 40, 6229 ER Maastricht, the Netherlands
| | - Z. Soons
- NUTRIM - School of Nutrition and Translational research In Metabolism, Maastricht University Medical Centre, Universiteitssingel 40, 6229 ER Maastricht, the Netherlands
| | - S. S. M. Rensen
- NUTRIM - School of Nutrition and Translational research In Metabolism, Maastricht University Medical Centre, Universiteitssingel 40, 6229 ER Maastricht, the Netherlands
| | - M. L. Smidt
- GROW-School for Oncology and Developmental Biology, Maastricht University Medical Centre, Universiteitssingel 40, 6229 ER Maastricht, the Netherlands ,Department of Surgery, Maastricht University Medical Centre, P. Debyelaan 25, 6229 HX Maastricht, the Netherlands
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25
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Ramakers F, Swennen Q, Pennemans V, Penders J, Vander Laenen M, Boer W. Predictors for aki in a cardiac surgery population undergoing cardio-pulmonary bypass. Intensive Care Med Exp 2015. [PMCID: PMC4797605 DOI: 10.1186/2197-425x-3-s1-a635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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26
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Scheepers LEJM, Penders J, Mbakwa CA, Thijs C, Mommers M, Arts ICW. The intestinal microbiota composition and weight development in children: the KOALA Birth Cohort Study. Int J Obes (Lond) 2014; 39:16-25. [PMID: 25298274 DOI: 10.1038/ijo.2014.178] [Citation(s) in RCA: 94] [Impact Index Per Article: 9.4] [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: 01/31/2014] [Revised: 09/04/2014] [Accepted: 09/24/2014] [Indexed: 12/17/2022]
Abstract
OBJECTIVE To investigate whether the intestinal microbiota composition in early infancy is associated with subsequent weight development in children. METHODS Analyses were conducted within the KOALA Birth Cohort Study (n = 2834). This cohort originates from two recruitments groups: pregnant women with a conventional lifestyle (no selection based on lifestyle) and pregnant women recruited through alternative channels (organic shops, anthroposophic clinicians/midwives, Steiner schools and relevant magazines). From 909 one-month-old infants, fecal samples were collected and analyzed by quantitative PCR targeting bifidobacteria, Bacteroides fragilis group, Clostridium difficile, Escherichia coli, Lactobacilli and total bacteria counts. Between the ages of 1 and 10 years, parent-reported weight and height was collected at 7 time points. Age- and gender-standardized body mass index (BMI) z-scores were calculated. Data were analyzed using generalized estimating equation. RESULTS Colonization with B. fragilis group was borderline significantly associated with a higher BMI z-score of 0.15 (95% confidence interval (CI): -0.02 to 0.31), in the conventional subcohort. After stratification for fiber intake (P(forinteraction) = 0.003), colonization with B. fragilis group was associated with a 0.34 higher BMI z-score among children with a low-fiber intake in this subcohort (95% CI: 0.17-0.53). Higher counts among colonized children were positively associated with BMI z-score only in children within the conventional subcohort and a high-fiber diet (BMI z-score 0.08; 95% CI: 0.01-0.14), but inversely associated in children with a low-fiber diet (BMI z-score -0.05; 95% CI: -0.10 to 0.00), and in children recruited through alternative channels (BMI z-score -0.10; 95% CI: -0.17 to -0.03). The other bacteria were not associated with BMI z-scores, regardless of subcohort. CONCLUSION Using a targeted approach, we conclude that the intestinal microbiota, particularly the B. fragilis group, is associated with childhood weight development. To identify the potential impact of additional bacterial taxa, further prospective studies applying an unconstrained in-depth characterization of the microbiota are needed.
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Affiliation(s)
- L E J M Scheepers
- Department of Epidemiology, Maastricht University, CAPHRI School for Public Health and Primary Care, Maastricht, The Netherlands
| | - J Penders
- 1] Department of Epidemiology, Maastricht University, CAPHRI School for Public Health and Primary Care, Maastricht, The Netherlands [2] Department of Medical Microbiology, Maastricht University Medical Centre, NUTRIM School for Nutrition, Toxicology and Metabolism, Maastricht, The Netherlands
| | - C A Mbakwa
- Department of Epidemiology, Maastricht University, CAPHRI School for Public Health and Primary Care, Maastricht, The Netherlands
| | - C Thijs
- Department of Epidemiology, Maastricht University, CAPHRI School for Public Health and Primary Care, Maastricht, The Netherlands
| | - M Mommers
- Department of Epidemiology, Maastricht University, CAPHRI School for Public Health and Primary Care, Maastricht, The Netherlands
| | - I C W Arts
- 1] Department of Epidemiology, Maastricht University, CAPHRI School for Public Health and Primary Care, Maastricht, The Netherlands [2] Department of Epidemiology, Maastricht University, CARIM School for Cardiovascular Diseases, Maastricht, The Netherlands
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27
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Penders J, Kissner R, Koppenol WH. ONOOH does not react with H2: Potential beneficial effects of H2 as an antioxidant by selective reaction with hydroxyl radicals and peroxynitrite. Free Radic Biol Med 2014; 75:191-4. [PMID: 25086438 DOI: 10.1016/j.freeradbiomed.2014.07.025] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [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: 05/22/2014] [Revised: 07/17/2014] [Accepted: 07/21/2014] [Indexed: 11/23/2022]
Abstract
H2 has been suggested to act as an antioxidant when administered just before the reperfusion phase of induced oxidative stress. These effects have been reported, for example, for the heart, brain, and liver. It is hypothesized that this beneficial effect may be due to selective scavenging of HO(⋅) and ONOOH by H2. The reaction of H2 with HO(⋅) has been studied by pulse radiolysis in the past and is too slow to be physiologically relevant, not to mention that the reaction yields the reactive H(⋅) radical. We therefore investigated whether H2 reacts with ONOOH and whether the presence of H2 influences the yield of nitration of tyrosine by ONOOH. With only negative results, we entertained the notion that H2 may possibly exert its beneficial effects by reducing Fe(III) centers, oxidized during oxidative stress. However, neither hemes nor iron-sulfur clusters were reduced.
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Affiliation(s)
- Jelle Penders
- Institute of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, Swiss Federal Institute of Technology, CH-8093 Zurich, Switzerland; Department of Chemistry and Chemical Engineering, Eindhoven University of Technology, 5612 AZ Eindhoven, The Netherlands
| | - Reinhard Kissner
- Institute of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, Swiss Federal Institute of Technology, CH-8093 Zurich, Switzerland
| | - Willem H Koppenol
- Institute of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, Swiss Federal Institute of Technology, CH-8093 Zurich, Switzerland.
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28
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Altini M, Penders J, Vullers R, Amft O. Automatic heart rate normalization for accurate energy expenditure estimation. An analysis of activities of daily living and heart rate features. Methods Inf Med 2014; 53:382-8. [PMID: 25245124 DOI: 10.3414/me13-02-0031] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2013] [Accepted: 03/06/2014] [Indexed: 11/09/2022]
Abstract
INTRODUCTION This article is part of the focus theme of Methods of Information in Medicine on "Pervasive Intelligent Technologies for Health". BACKGROUND Energy Expenditure (EE) estimation algorithms using Heart Rate (HR) or a combination of accelerometer and HR data suffer from large error due to inter-person differences in the relation between HR and EE. We recently introduced a methodology to reduce inter-person differences by predicting a HR normalization parameter during low intensity Activities of Daily Living (ADLs). By using the HR normalization, EE estimation performance was improved, but conditions for performing the normalization automatically in daily life need further analysis. Sedentary lifestyle of many people in western societies urge for an in-depth analysis of the specific ADLs and HR features used to perform HR normalization, and their effects on EE estimation accuracy in participants with varying Physical Activity Levels (PALs). OBJECTIVES To determine 1) which low intensity ADLs and HR features are necessary to accurately determine HR normalization parameters, 2) whether HR variability (HRV) during ADLs can improve accuracy of the estimation of HR normalization parameters, 3) whether HR normalization parameter estimation from different ADLs and HR features is affected by the participants' PAL, and 4) what is the impact of different ADLs and HR features used to predict HR normalization parameters on EE estimation accuracy. METHODS We collected reference EE from indirect calorimetry, accelerometer and HR data using one single sensor placed on the chest from 36 participants while performing a wide set of activities. We derived HR normalization parameters from individual ADLs (lying, sedentary, walking at various speeds), as well as combinations of sedentary and walking activities. HR normalization parameters were used to normalized HR and estimate EE. RESULTS From our analysis we derive that 1) HR normalization using resting activities alone does not reduce EE estimation error in participants with different reported PALs. 2) HRV features did not show any significant improvement in RMSE. 3) HR normalization parameter estimation was found to be biased in participants with different PALs when sedentary-only data was used for the estimation. 4) EE estimation error was not reduced when normalization was carried out using sedentary activities only. However, using data from walking at low speeds improved the results significantly (30-36%). CONCLUSION HR normalization parameters able to reduce EE estimation error can be accurately estimated from low intensity ADLs, such as sedentary activities and walking at low speeds (3 - 4 km/h), regardless of reported PALs. However, sedentary activities alone, even when HRV features are used, are insufficient to estimate HR normalization parameters accurately.
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Affiliation(s)
- M Altini
- Marco Altini, Holst Centre/imec The Netherlands, High Tech Campus 31, 5656AE, Eindhoven, The Netherlands, E-mail:
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Timmermans SH, Mommers M, Gubbels JS, Kremers SPJ, Stafleu A, Stehouwer CDA, Prins MH, Penders J, Thijs C. Maternal smoking during pregnancy and childhood overweight and fat distribution: the KOALA Birth Cohort Study. Pediatr Obes 2014; 9:e14-25. [PMID: 23362054 DOI: 10.1111/j.2047-6310.2012.00141.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2012] [Revised: 12/09/2012] [Accepted: 12/10/2012] [Indexed: 11/28/2022]
Abstract
UNLABELLED What is already known about this subject There is an association between maternal smoking during pregnancy and higher body mass index (BMI) and overweight in childhood. What this study adds The association between maternal smoking during pregnancy and childhood overweight develops with age, starting with a lower birth weight, followed by weight catch-up in the first year after birth, finally leading to overweight at school age. Children of mothers who had smoked during pregnancy had a higher risk of exceeding the 85th percentile of BMI, waist circumference and total skinfold thickness at school age. BACKGROUND Maternal smoking during pregnancy is associated with childhood overweight, but the association with fat distribution is not clear. OBJECTIVE To explore the longitudinal association between smoking during pregnancy and childhood overweight and fat distribution. METHODS In the KOALA Birth Cohort Study, repeated questionnaires were administered to 2698 mother-child pairs, including questions on smoking at 14 and 34 weeks of pregnancy. Main outcomes were birth weight, weight gain in the first year, body mass index (BMI) z-scores and overweight (BMI ≥85th percentile) at 1, 2, 4-5 and 6-7 years (n = 1730) and waist circumference and four skinfold thicknesses measured at home visits at age 6-7 years in a subgroup (n = 418). We used multivariable linear and logistic regression, with generalized estimating equations (GEE) for repeated measurements. RESULTS Maternal smoking was associated with lower birth weight, higher weight gain in the first year and increasing overweight after infancy (change with age P = 0.02 in the GEE). Maternal smoking vs. non-smoking during pregnancy was associated with a higher risk of the child exceeding the 85th percentile of BMI (adjusted odds ratio [aOR] 3.72; 95% CI 1.33-10.4), waist circumference (aOR 2.65; 95% CI 1.06-6.59) and sum of skinfold thicknesses (aOR 4.45; 95% CI 1.63-12.2) at the age of 6-7 years. CONCLUSIONS Maternal smoking during pregnancy is associated with lower birth weight, weight catch-up and development of overweight into childhood.
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Affiliation(s)
- S H Timmermans
- Department of Epidemiology, CAPHRI School for Public Health and Primary Care, Maastricht University Medical Centre, Maastricht, The Netherlands
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Louwies T, De Boever P, Cox B, Penders J, Panis L, Nawrot T. P3.12 BLOOD PRESSURE CHANGES IN ASSOCIATION WITH PERSONAL BLACK CARBON EXPOSURE ARE NOT MEDIATED THROUGH MICROCIRCULATORY RESPONSES. Artery Res 2014. [DOI: 10.1016/j.artres.2014.09.123] [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: 11/29/2022] Open
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Aminian K, Mariani B, Paraschiv-Ionescu A, Hoskovec C, Bula C, Penders J, Tacconi C, Marcellini F. Foot worn inertial sensors for gait assessment and rehabilitation based on motorized shoes. Annu Int Conf IEEE Eng Med Biol Soc 2012; 2011:5820-3. [PMID: 22255663 DOI: 10.1109/iembs.2011.6091440] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Fall prevention in elderly subjects is often based on training and rehabilitation programs that include mostly traditional balance and strength exercises. By applying such conventional interventions to improve gait performance and decrease fall risk, some important factors are neglected such as the dynamics of the gait and the motor learning processes. The EU project "Self Mobility Improvement in the eLderly by counteractING falls" (SMILING project) aimed to improve age-related gait and balance performance by using unpredicted external perturbations during walking through motorized shoes that change insole inclination at each stance. This paper describes the shoe-worn inertial module and the gait analysis method needed to control in real-time the shoe insole inclination during training, as well as gait spatio-temporal parameters obtained during long distance walking before and after the 8-week training program that assessed the efficacy of training with these motorized shoes.
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Affiliation(s)
- K Aminian
- Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzeralnd. aminian@ epfl.ch
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Beerepoot M, den Heijer C, Penders J, Prins J, Stobberingh E, Geerlings S. Predictive value of Escherichia coli susceptibility in strains causing asymptomatic bacteriuria for women with recurrent symptomatic urinary tract infections receiving prophylaxis. Clin Microbiol Infect 2012; 18:E84-90. [DOI: 10.1111/j.1469-0691.2012.03773.x] [Citation(s) in RCA: 14] [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: 11/27/2022]
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Ngo B, Van Pelt K, Labarque V, Van De Casseye W, Penders J. Late vitamin K deficiency bleeding leading to a diagnosis of cystic fibrosis: a case report. Acta Clin Belg 2011; 66:142-143. [PMID: 21630615 DOI: 10.2143/acb.66.2.2062536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Vitamin K deficiency bleeding (VKDB) in infants still occurs despite worldwide use of prophylaxis. Clinical manifestations can be dramatic with over 50% of patients presenting with intracranial haemorrhage and a mortality rate of 20% in late vitamin K deficiency bleeding. Special attention should be given to infants with a high risk profile (preterm, breast feeding, cholestasis, malabsorption). A tentative diagnosis can be made observing quick normalisation of some easy-to-perform haemostatic parameters (PT, aPTT) after administration of vitamin K. Nowadays, VKDB can still be the first clinical sign of diseases causing malabsorption of fat-soluble vitamins. In this case report, VKDB led to the diagnosis of cystic fibrosis, the most common fatal autosomal recessive disease among Caucasian people.
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Affiliation(s)
- B Ngo
- Laboratory of Clinical Biology, Ziekenhuis Oost-Limburg, Campus St.-Jan, Genk, Belgium.
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Notenboom ML, Mommers M, Jansen EHJM, Penders J, Thijs C. Maternal fatty acid status in pregnancy and childhood atopic manifestations: KOALA Birth Cohort Study. Clin Exp Allergy 2011; 41:407-16. [PMID: 21255139 DOI: 10.1111/j.1365-2222.2010.03672.x] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND Prevalence of atopic disorders has increased rapidly, but aetiological factors responsible for this increase are still largely unknown. Prenatal exposure to a pro-inflammatory fatty acid status is hypothesized although little research has been carried out. OBJECTIVE To investigate whether prenatal fatty acid exposures are associated with atopy in childhood. METHODS In the KOALA Birth Cohort Study, maternal blood samples (n=1275) at 34-36 weeks of pregnancy were assayed for n-6 and n-3 long-chain polyunsaturated fatty acids (LCPs). The full spectrum of offspring atopic manifestations (wheeze, asthma, allergic rhinoconjunctivitis, eczema, atopic dermatitis, allergic sensitization, and high total IgE) until the age of 6-7 years was assessed by repeated parental questionnaires and measurements of total and specific IgE. Associations of maternal fatty acid status with child atopic outcomes were analysed using multivariable logistic regression and generalized estimating equations for repeated measurements. RESULTS High ratio of maternal n-6 vs. n-3 LCPs was associated with a lower risk of eczema in the child (P for trend 0.012). More specifically, we found a decreased risk of eczema in the first 7 months of life with increasing arachidonic acid levels (P for trend 0.013). No associations were found between maternal fatty acids and offspring airway-related atopic manifestations, sensitization, or high total IgE. CONCLUSION AND CLINICAL RELEVANCE The development of atopic disorders in early childhood is associated with prenatal exposure to n-6 vs. n-3 fatty acids, but with inconsistencies between different manifestations. Further exploration of associations with maternal diet and genetic variants in genes regulating fatty acid metabolism are required. This study shows that the influence of prenatal exposure to fatty acids on the risk of eczema in the child is limited to the first year of life.
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Affiliation(s)
- M L Notenboom
- Department of Epidemiology, CAPHRI School of Public Health and Primary Care, Maastricht University, Maastricht, The Netherlands
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Abstract
Our aim was to systematically review and meta-analyse longitudinal studies on antibiotic use and subsequent development of wheeze and/or asthma with regards to study quality, outcome measurement, reverse causation (RC; wheezing/asthma symptoms have caused prescription of antibiotics) and confounding by indication (CbI; respiratory tract infections leading to antibiotic use may be the underlying cause triggering asthma symptom development). English-language papers and studies published before November 1, 2010 with longitudinal observational design were included. Study quality was assessed using the Newcastle-Ottawa scale. We identified 21 longitudinal studies. The effect of antibiotic use on wheeze/asthma risk varied between studies. 18 studies were eligible for meta-analysis showing pooled OR 1.27 (95% CI 1.12-1.43) for wheeze/asthma. When we eliminated studies with possible RC and CbI, the pooled risk estimate in the nine remaining studies was attenuated to OR 1.12 (95% CI 0.98-1.26). Definition of wheeze/asthma and age at follow-up differed between studies. Three studies focused on wheeze/asthma beyond 5-6 yrs of age with the presence of active symptoms and/or medication (pooled OR 1.08, 95% CI 0.93-1.23; dominated by one study). RC and CbI lead to overestimation of the association between antibiotic use and subsequent development of wheeze/asthma. Association was weak when fully adjusted for these types of bias. Heterogeneity of disease definition between studies could affect the results.
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Affiliation(s)
- J Penders
- Department of Medical Microbiology, Maastricht University Medical Centre, P.O Box 5800, NL-6202 AZ, Maastricht, The Netherlands.
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Vanlerberghe F, De Volder M, de Beeck MO, Penders J, Reynaerts D, Puers R, Van Hoof C. 2-Scale topography dry electrode for biopotential measurements. Annu Int Conf IEEE Eng Med Biol Soc 2011; 2011:1892-1895. [PMID: 22254700 DOI: 10.1109/iembs.2011.6090536] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The design and fabrication of a novel 2-scale topography dry electrode using macro and micro needles is presented. The macro needles enable biopotential measurements on hairy skin, the function of the micro needles is to decrease the electrode impedance even further by penetrating the outer skin layer. Also, a fast and reliable impedance characterization protocol is described. Based on this impedance measurement protocol, a comparison study is made between our dry electrode, 3 other commercial dry electrodes and a standard wet gel electrode. Promising results are already obtained with our electrodes which do not have skin piercing micro needles. For the proposed electrodes, three different conductive coatings (Ag/AgCl/Au) are compared. AgCl is found to be slightly better than Ag as coating material, while our Au coated electrodes have the highest impedance.
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Penders J, Pop V, Caballero L, van de Molengraft J, van Schaijk R, Vullers R, Van Hoof C. Power optimization in body sensor networks: the case of an autonomous wireless EMG sensor powered by PV-cells. Annu Int Conf IEEE Eng Med Biol Soc 2010; 2010:2017-20. [PMID: 21097219 DOI: 10.1109/iembs.2010.5628052] [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] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Recent advances in ultra-low-power circuits and energy harvesters are making self-powered body sensor nodes a reality. Power optimization at the system and application level is crucial in achieving ultra-low-power consumption for the entire system. This paper reviews system-level power optimization techniques, and illustrates their impact on the case of autonomous wireless EMG monitoring. The resulting prototype, an Autonomous wireless EMG sensor power by PV-cells, is presented.
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Affiliation(s)
- J Penders
- Holst Centre, HTC 31, 5656, AE Eindhoven, the Netherlands.
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Yazicioglu RF, Torfs T, Penders J, Romero I, Kim H, Merken P, Gyselinckx B, Yoo HJ, Van Hoof C. Ultra-low-power wearable biopotential sensor nodes. Annu Int Conf IEEE Eng Med Biol Soc 2010; 2009:3205-8. [PMID: 19964056 DOI: 10.1109/iembs.2009.5333154] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
This paper discusses ultra-low-power wireless sensor nodes intended for wearable biopotential monitoring. Specific attention is given to mixed-signal design approaches and their impact on the overall system power dissipation. Examples of trade-offs in power dissipation between analog front-ends and digital signal processing are also given. It is shown how signal filtering can further reduce the internal power consumption of a node. Such power saving approaches are indispensable as real-life tests of custom wireless ECG patches reveal the need for artifact detection and correction. The power consumption of such additional features has to come from power savings elsewhere in the system as the overall power budget cannot increase.
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Penders J, Yazicioglu RF, van de Molengraft J, Patki S, Torfs T, Brown L, Van Hoof C. Wireless EEG systems: increasing functionality, decreasing power. Annu Int Conf IEEE Eng Med Biol Soc 2010; 2010:3441. [PMID: 21097257 DOI: 10.1109/iembs.2010.5627857] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Recent advances in low-power wireless technologies for health are instrumental in bringing EEG monitoring from the hospital to the home environment. This talk provides an overview of imec's research on low-power wireless EEG monitoring. Enabling technologies, integrated systems and remaining challenges are discussed.
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Affiliation(s)
- J Penders
- Imec at the Holst Centre, HTC 31, 5656 AE Eindhoven, the Netherlands.
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Penders J, Stobberingh EE, van den Brandt PA, van Ree R, Thijs C. Toxigenic and non-toxigenic Clostridium difficile: determinants of intestinal colonisation and role in childhood atopic manifestations. Gut 2008; 57:1025-6. [PMID: 18559395 DOI: 10.1136/gut.2007.143214] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/08/2022]
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Penders J, Stobberingh EE. Antibiotic resistance of motile aeromonads in indoor catfish and eel farms in the southern part of The Netherlands. Int J Antimicrob Agents 2007; 31:261-5. [PMID: 18160266 DOI: 10.1016/j.ijantimicag.2007.10.002] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2007] [Revised: 10/03/2007] [Accepted: 10/04/2007] [Indexed: 11/29/2022]
Abstract
The prevalence and degree of antibiotic resistance in catfish and eel farms in the southern part of The Netherlands was examined using motile aeromonads as indicator bacteria. A total of 29 water samples were collected, originating from six catfish farms, one catfish hatchery and three eel farms, and were plated on an Aeromonas-selective agar with and without antibiotics. From each plate, one colony was screened for presumptive motile aeromonads and tested for antibiotic susceptibility. The prevalence of resistance was as follows: ampicillin and oxytetracycline 100%; sulfamethoxazole 24%; trimethoprim 3%; and ciprofloxacin and chloramphenicol 0%. The majority of samples showed a high degree of oxytetracycline resistance, implicating fish farms as a major reservoir of oxytetracycline resistance genes. This reservoir might form a risk for human health and has major consequences for the effectiveness of this antibiotic in the treatment of infectious diseases in fish.
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Affiliation(s)
- J Penders
- Nutrition and Toxicology Research Institute Maastricht, Department of Epidemiology, Maastricht University, P.O. Box 616, 6200 MD Maastricht, The Netherlands.
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Abstract
The prevalence of atopic diseases, including eczema, allergic rhinoconjunctivitis and asthma, has increased worldwide, predominantly in westernized countries. Recent epidemiological studies and experimental research suggest that microbial stimulation of the immune system influences the development of tolerance to innocuous allergens. The gastrointestinal microbiota composition may be of particular interest, as it provides an early and major source of immune stimulation and seems to be a prerequisite for the development of oral tolerance. In this review the observational studies of the association between the gut microbiota and atopic diseases are discussed. Although most studies indicated an association between the gut microbiota composition and atopic sensitization or symptoms, no specific harmful or protective microbes can be identified yet. Some important methodological issues that have to be considered are the microbiological methods used (traditional culture vs molecular techniques), the timing of examining the gut microbiota, the definition of atopic outcomes, confounding and reverse causation. In conclusion, the microbiota hypothesis in atopic diseases is promising and deserves further attention. To gain more insight into the role of the gut microbiota in the etiology of atopy, large-scale prospective birth cohort studies using molecular methods to study the gut microbiota are needed.
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Affiliation(s)
- J Penders
- Department of Epidemiology, Nutrition and Toxicology Research Institute Maastricht (NUTRIM), Maastricht University, Maastricht, The Netherlands
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Penders J, Stobberingh EE, Thijs C, Adams H, Vink C, van Ree R, van den Brandt PA. Molecular fingerprinting of the intestinal microbiota of infants in whom atopic eczema was or was not developing. Clin Exp Allergy 2006; 36:1602-8. [PMID: 17177684 DOI: 10.1111/j.1365-2222.2006.02599.x] [Citation(s) in RCA: 95] [Impact Index Per Article: 5.3] [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: 01/15/2023]
Abstract
BACKGROUND The rise in atopic diseases has been linked to disturbances in the intestinal microbiota composition. OBJECTIVE The purpose of this study was to investigate the intestinal microbiota composition in infants in whom atopic (IgE-associated) eczema was or was not developing, using a molecular fingerprinting technique. METHODS Within a prospective birth cohort study, fecal samples have been collected at the infant's age of 1 month. Within the context of this cohort, we conducted a nested case-control study comparing fecal samples of 26 infants who became sensitized and developed eczema within the first year of life with 52 non-sensitized non-eczematous infants. The composition of the fecal samples was examined using PCR combined with denaturing gradient gel electrophoresis. Using real-time PCR, total bacterial counts and bifidobacterial counts were enumerated. RESULTS Neither total bacterial profiles nor the type and proportion of bifidobacteria in the feces were associated with the development of atopic eczema. The similarity of bacterial profiles was low; mean similarity was approximately 33% in both infants with or without atopic eczema. The prevalence of one specific band in total bacterial profiles was significantly higher in infants with atopic eczema compared with controls (96% vs. 71%, P = 0.01). Identification of this band revealed that it represented Escherichia coli. CONCLUSION Although no association was found between the development of IgE-associated eczema and the dominant gut microbiota as a whole or with the bifdobacterial microbiota, the association with E. coli indicates that differences in gut microbiota do precede the development of atopy.
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Affiliation(s)
- J Penders
- Department of Epidemiology, Nutrition and Toxicology Research Institute Maastricht (NUTRIM), Maastricht University, Maastricht, The Netherlands.
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Snijders BEP, Damoiseaux JGMC, Penders J, Kummeling I, Stelma FF, van Ree R, van den Brandt PA, Thijs C. Cytokines and soluble CD14 in breast milk in relation with atopic manifestations in mother and infant (KOALA Study). Clin Exp Allergy 2006; 36:1609-15. [PMID: 17177685 DOI: 10.1111/j.1365-2222.2006.02613.x] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.6] [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: 11/30/2022]
Abstract
BACKGROUND Conflicting evidence exists concerning the protective role of breastfeeding in allergy and atopic disease aetiology. Breast milk contains biologically active molecules influencing the innate immune system of newborns. OBJECTIVE We aim to assess whether cytokines (TGF-beta1, IL-10 and IL-12) and soluble CD14 (sCD14) in breast milk are influenced by maternal atopic constitution and modify the development of atopic manifestations in infants. METHODS Milk samples were collected at 1 month post-partum of 315 lactating mothers participating in the ongoing KOALA Birth Cohort Study. The cytokines and sCD14 were analysed by ELISA in the aqueous fraction. We compared the concentrations of cytokines and sCD14 in breast milk between mothers with and without an allergic history and also with and without allergic sensitization (specific IgE). Associations of cytokines and sCD14 with the development of eczema, wheezing in the first 2 years of life and allergic sensitization of infants at the age of 2 years were analysed by multivariate logistic regression analyses to correct for confounders. RESULTS We found higher sCD14 levels in mothers with a positive vs. negative allergic history (7.6 vs. 7.0 microg/mL; P = 0.04) and in mothers who were sensitized vs. non-sensitized (7.8 vs. 7.1 microg/mL; P = 0.03). None of the studied immune factors were associated with infant's atopic outcomes. IL-10 was not detected above the detection limit of 0.2 pg/mL. CONCLUSION Taking together the results of the present and previous studies, we conclude that there is no convincing evidence for a relation between TGF-beta1, sCD14, IL-10 or IL-12 in breast milk and atopic manifestations in infants.
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Affiliation(s)
- B E P Snijders
- Care and Public Health Research Institute (CAPHRI), Department of Epidemiology, Maastricht University, Maastricht, The Netherlands.
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Penders J, Everaert K, Van Laere M, Verschraegen GLC. Reply to Vaidyanathan et al. Spinal Cord 2004. [DOI: 10.1038/sj.sc.3101661] [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: 11/09/2022]
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Abstract
STUDY DESIGN A retrospective study concerning urinary tract infections in spinal cord injury (SCI) patients. OBJECTIVES To check whether the regular (1/week) urine cultures allow a more accurate treatment of urinary tract infections in SCI patients compared to empiric treatment. SETTING Ghent University Hospital, East-Flanders, Belgium. METHODS Group 1: 24 tetraplegic patients; group 2: 22 paraplegic patients; group 3: 28 other polytrauma patients as controls. These groups were chosen as catheterisation and other voiding methods differ according to the underlying pathology. RESULTS An average of four clinically significant episodes of bacteriuria were found for groups 1 and 2, while group 3 experienced very few urinary infections. The mean species turnover of the first two groups was 2. No statistically significant difference was found in antibiotic-resistance patterns of organisms isolated. CONCLUSION Despite different catheterisation techniques in para- and tetraplegic patients, we conclude that: (1) the number of episodes of clinical significant nosocomial urinary infections is not different; (2) the mean species turnover is the same; (3) because of the species turnover, the value of regular urine cultures for 'documented' treatment of clinical relevant urinary infections seems to be limited. So urine culture could be performed less frequently or only when therapy becomes mandatory; (4) No oral antibiotic with superior activity was found: treatment is best started empirically (after sampling for urine culture) and adjusted to the resulting antibiotic sensitivity screening.
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Affiliation(s)
- J Penders
- Laboratory of Bacteriology, Ghent University Hospital, Belgium
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Van Haaften RI, Evelo CT, Penders J, Eijnwachter MP, Haenen GR, Bast A. Inhibition of human glutathione S-transferase P1-1 by tocopherols and alpha-tocopherol derivatives. Biochim Biophys Acta 2001; 1548:23-8. [PMID: 11451434 DOI: 10.1016/s0167-4838(01)00211-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
alpha-Tocopherol inhibits glutathione S-transferase P1-1 (GST P1-1) (R.I.M. van Haaften, C.T.A. Evelo, G.R.M.M. Haenen, A. Bast, Biochem. Biophys. Res. Commun. 280 (2001)). In various cosmetic and dietary products alpha-tocopherol is added as a tocopherol ester. Therefore we have studied the effect of various tocopherol derivatives on GST P1-1 activity. It was found that GST P1-1 is inhibited, in a concentration dependent manner, by these compounds. Of the compounds tested, the tocopherols were the most potent inhibitors of GST P1-1; the concentration giving 50% inhibition (IC(50)) is <1 microM. The esterified tocopherols and alpha-tocopherol quinone also inhibit the GST P1-1 activity at a very low concentration: for most compounds the IC(50) was below 10 microM. RRR-alpha-Tocopherol acetate lowered the V(max) values, but did not affect the K(m) for either 1-chloro-2,4-dinitrobenzene or GSH. This indicates that the GST P1-1 enzyme is non-competitively inhibited by RRR-alpha-tocopherol acetate. The potential implications of GST P1-1 inhibition by tocopherol and alpha-tocopherol derivatives are discussed.
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Affiliation(s)
- R I Van Haaften
- Department of Pharmacology and Toxicology, Faculty of Medicine, Universiteit Maastricht, P.O. Box 616, 6200 MD Maastricht, Netherlands.
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Goldman AP, Irwin JM, Glover MU, Mick W, Penders J. Use of transesophageal echocardiography (TEE) aided radiofrequency ablation of Wolff-Parkinson-White accessory pathways. Pacing Clin Electrophysiol 1992; 15:244. [PMID: 1372423 DOI: 10.1111/j.1540-8159.1992.tb03068.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Kusters P, Penders J. [Changes in social interaction following a CVA. Practical experience at a rehabilitation center]. Tijdschr Gerontol Geriatr 1987; 18:81-4. [PMID: 3590281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
After a cerebral infarct the joint efforts in our center for rehabilitation 'Hoensbroeck' are intended to help the patient regain his equilibrium. The loss of a number of bodily functions results in limitations in the activities of daily living. The way in which the patient copes with these impairments will finally determine the seriousness of the handicap. This adjustment to the disease and its consequences takes place in a social context. In this contribution special attention is paid to the influence of cognitive functional disorders on the interaction process. The importance of timely diagnosis and support is also noted. In this connection the partner group being part of the treatment as applied in 'Hoensbroeck' for some time is introduced. Finally the recent foundation is mentioned of a stroke patients association.
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