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  1. Article ; Online: Trastuzumab Induces an Immediate, Transient Volume Increase in Humans

    Joannes A.A. Reijers / Jacobus Burggraaf

    EBioMedicine, Vol 2, Iss 8, Pp 953-

    A Randomised Placebo-Controlled Trial

    2015  Volume 959

    Abstract: Background: The exact extent of and the mechanism by which trastuzumab causes cardiac side effects are not completely unravelled. We investigated the (cardiotoxic) side effects of trastuzumab in a relatively large homogeneous population. Methods: Healthy ...

    Abstract Background: The exact extent of and the mechanism by which trastuzumab causes cardiac side effects are not completely unravelled. We investigated the (cardiotoxic) side effects of trastuzumab in a relatively large homogeneous population. Methods: Healthy male volunteers (n = 54) with a left ventricle ejection fraction (LVEF) >55% were administered 6 mg/kg trastuzumab (n = 46) IV in 90 min in a placebo-controlled, parallel study. Placebo consisted of 0 · 9% NaCl (n = 8). Assessments included body weight, routine and cardiac laboratory markers and serial echocardiographic examinations (8 placebo and 9 trastuzumab treated participants) up to 63 days after dosing. Statistical analysis was done using repeated measurements of variance. Findings: Following trastuzumab infusion, fluid retention was observed: mean body weight increased over the first 4 days post-administration with 0 · 4 kg (95%-confidence interval: −0 · 2, 0 · 9, p = 0 · 2261) compared to placebo, mean haemoglobin concentration decreased with 0 · 3 mM (−0 · 6, −0 · 1; p = 0 · 0043), as did haematocrit (−0 · 013 L/L [−0 · 024, −0 · 002], p = 0 · 0216), and protein (−2 g/L [−4, −0], p = 0 · 0443) and albumin (−2 g/L [−3, −1], p < 0 · 0001) concentrations. Elevations in NT-proBNP levels, parallel to the weight increase, were observed in individual cases, but not on a group level. Troponin-T concentrations did not increase. The only echocardiographic parameter that changed significantly at all studied dose levels was E/A-ratio, a load-dependent parameter: from 1 · 81 (SD 0 · 42) to 1 · 98 (0 · 31) 3–5 days after administration, contrast to placebo of 0 · 57 (90%-CI: 0 · 21–0 · 93, p = 0 · 0034). Ejection fraction and pulsed-wave Doppler recorded parameters remained unchanged. Interpretation: Single dose administration of trastuzumab in humans is associated with an immediate, transient extracellular volume increase, either as a primary or secondary (compensatory) response, which can be detected easily using routine clinical assessments. Echocardiographic changes, both short and long term, could not be found after single dose administration to drug-naive patients.
    Keywords Trastuzumab ; Fluid retention ; Cardiotoxicity ; Haemodynamics ; Echocardiography ; Healthy volunteers ; Medicine ; R
    Subject code 610
    Language English
    Publishing date 2015-08-01T00:00:00Z
    Publisher Elsevier
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: The Effect of a 13-Valent Conjugate Pneumococcal Vaccine on Circulating Antibodies Against Oxidized LDL and Phosphorylcholine in Man, A Randomized Placebo-Controlled Clinical Trial

    Hendrika W. Grievink / Pim Gal / Maria Ozsvar Kozma / Erica S. Klaassen / Johan Kuiper / Jacobus Burggraaf / Christoph J. Binder / Matthijs Moerland

    Biology, Vol 9, Iss 345, p

    2020  Volume 345

    Abstract: In mice vaccination with Streptococcus pneumoniae results in an increase in anti-oxLDL IgM antibodies due to mimicry of anti-phosphorylcholine (present in the cell wall of S. pneumoniae ) and anti-oxLDL IgM. In this study we investigated the human ... ...

    Abstract In mice vaccination with Streptococcus pneumoniae results in an increase in anti-oxLDL IgM antibodies due to mimicry of anti-phosphorylcholine (present in the cell wall of S. pneumoniae ) and anti-oxLDL IgM. In this study we investigated the human translation of this molecular mimicry by vaccination against S. pneumoniae using the Prevenar-13 vaccine. Twenty-four healthy male volunteers were vaccinated with Prevenar-13, either three times, twice or once in a double-blind, placebo-controlled, randomized single center clinical study. Anti-pneumococcal wall, oxLDL and phosphorycholine antibody levels were measured at a fixed serum dilution, as well as circulating lipid levels over the course of 68 weeks. A significant increase in anti-oxLDL IgG and IgM was seen in the group receiving two doses six months apart compared to the placebo. However, these differences were not observed in the groups receiving a single dose, two doses one month apart, or three doses. This study shows that vaccination with Prevenar-13 does not result in robust anti-oxLDL IgM levels in humans. Further research would be required to test alternative pneumococcal-based vaccines, vaccination regimens or study populations, such as cardiovascular disease patients.
    Keywords cardiovascular disease ; vaccine ; clinical trials ; translational medicine ; atherosclerosis ; oxLDL ; Biology (General) ; QH301-705.5
    Subject code 610
    Language English
    Publishing date 2020-10-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article ; Online: Near-Infrared Fluorescence Tumor-Targeted Imaging in Lung Cancer

    Lisanne K. A. Neijenhuis / Lysanne D. A. N. de Myunck / Okker D. Bijlstra / Peter J. K. Kuppen / Denise E. Hilling / Frank J. Borm / Danielle Cohen / J. Sven D. Mieog / Willem H. Steup / Jerry Braun / Jacobus Burggraaf / Alexander L. Vahrmeijer / Merlijn Hutteman

    Life, Vol 12, Iss 446, p

    A Systematic Review

    2022  Volume 446

    Abstract: Lung cancer is the most common cancer type worldwide, with non-small cell lung cancer (NSCLC) being the most common subtype. Non-disseminated NSCLC is mainly treated with surgical resection. The intraoperative detection of lung cancer can be challenging, ...

    Abstract Lung cancer is the most common cancer type worldwide, with non-small cell lung cancer (NSCLC) being the most common subtype. Non-disseminated NSCLC is mainly treated with surgical resection. The intraoperative detection of lung cancer can be challenging, since small and deeply located pulmonary nodules can be invisible under white light. Due to the increasing use of minimally invasive surgical techniques, tactile information is often reduced. Therefore, several intraoperative imaging techniques have been tested to localize pulmonary nodules, of which near-infrared (NIR) fluorescence is an emerging modality. In this systematic review, the available literature on fluorescence imaging of lung cancers is presented, which shows that NIR fluorescence-guided lung surgery has the potential to identify the tumor during surgery, detect additional lesions and prevent tumor-positive resection margins.
    Keywords lung cancer ; near-infrared fluorescence imaging ; fluorescence-guided surgery ; molecular imaging ; optical imaging ; Science ; Q
    Language English
    Publishing date 2022-03-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  4. Article ; Online: Whole blood assay as a model for in vitro evaluation of inflammasome activation and subsequent caspase-mediated interleukin-1 beta release.

    Thi Anh Thu Tran / Hendrika W Grievink / Katarzyna Lipinska / Cornelis Kluft / Jacobus Burggraaf / Matthijs Moerland / Dimitar Tasev / Karen E Malone

    PLoS ONE, Vol 14, Iss 4, p e

    2019  Volume 0214999

    Abstract: Processing of pro-interleukin (IL)-1β and IL-18 is regulated by multiprotein complexes, known as inflammasomes. Inflammasome activation results in generation of bioactive IL-1β and IL-18, which can exert potent pro-inflammatory effects. Our aim was to ... ...

    Abstract Processing of pro-interleukin (IL)-1β and IL-18 is regulated by multiprotein complexes, known as inflammasomes. Inflammasome activation results in generation of bioactive IL-1β and IL-18, which can exert potent pro-inflammatory effects. Our aim was to develop a whole blood-based assay to study the inflammasome in vitro and that also can be used as an assay in clinical studies. We show whole blood is a suitable milieu to study inflammasome activation in primary human monocytes. We demonstrated that unprocessed human blood cells can be stimulated to activate the inflammasome by the addition of adenosine 5'-triphosphate (ATP) within a narrow timeframe following lipopolysaccharide (LPS) priming. Stimulation with LPS resulted in IL-1β release; however, addition of ATP is necessary for "full-blown" inflammasome stimulation resulting in high IL-1β and IL-18 release. Intracellular cytokine staining demonstrated monocytes are the major producers of IL-1β in human whole blood cultures, and this was associated with activation of caspase-1/4/5, as detected by a fluorescently labelled caspase-1/4/5 probe. By applying caspase inhibitors, we show that both the canonical inflammasome pathway (via caspase-1) as well as the non-canonical inflammasome pathway (via caspases-4 and 5) can be studied using this whole blood-based model.
    Keywords Medicine ; R ; Science ; Q
    Subject code 610
    Language English
    Publishing date 2019-01-01T00:00:00Z
    Publisher Public Library of Science (PLoS)
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  5. Article ; Online: Omiganan Enhances Imiquimod‐Induced Inflammatory Responses in Skin of Healthy Volunteers

    Tessa Niemeyer‐van der Kolk / Salma Assil / Thomas P. Buters / Melanie Rijsbergen / Erica S. Klaassen / Gary Feiss / Edwin Florencia / Errol P. Prens / Jacobus Burggraaf / Martijn B.A. vanDoorn / Robert Rissmann / Matthijs Moerland

    Clinical and Translational Science, Vol 13, Iss 3, Pp 573-

    2020  Volume 579

    Abstract: Omiganan (OMN; a synthetic cationic peptide) and imiquimod (IMQ; a TLR7 agonist) have synergistic effects on interferon responses in vitro. The objective of this study was to translate this to a human model for proof‐of‐concept, and to explore the ... ...

    Abstract Omiganan (OMN; a synthetic cationic peptide) and imiquimod (IMQ; a TLR7 agonist) have synergistic effects on interferon responses in vitro. The objective of this study was to translate this to a human model for proof‐of‐concept, and to explore the potential of OMN add‐on treatment for viral skin diseases. Sixteen healthy volunteers received topical IMQ, OMN, or a combination of both for up to 4 days on tape‐stripped skin. Skin inflammation was quantified by laser speckle contrast imaging and 2D photography, and molecular and cellular responses were analyzed in biopsies. IMQ treatment induced an inflammatory response of the skin. Co‐treatment with OMN enhanced this inflammatory response to IMQ, with increases in perfusion (+17.1%; 95% confidence interval (CI) 5.6%–30%; P < 0.01) and erythema (+1.5; 95% CI 0.25%–2.83; P = 0.02). Interferon regulatory factor‐driven and NFκB‐driven responses following TLR7 stimulation were enhanced by OMN (increases in IL‐6, IL‐10, MXA, and IFNɣ), and more immune cell infiltration was observed (in particular CD4+, CD8+, and CD14+ cells). These findings are in line with the earlier mechanistic in vitro data, and support evaluation of imiquimod/OMN combination therapy in human papillomavirus‐induced skin diseases.
    Keywords Therapeutics. Pharmacology ; RM1-950 ; Public aspects of medicine ; RA1-1270
    Subject code 610
    Language English
    Publishing date 2020-05-01T00:00:00Z
    Publisher Wiley
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  6. Article ; Online: Evaluation of the Effect of Aspirin on Platelet Aggregation

    Annelieke C. Kruithof / Matthijs Moerland / Eleftheria A. Anastasopoulou / Pieter-Jan de Kam / Marieke L. de Kam / Jacobus Burggraaf

    Journal of Biomedical Science and Engineering, Vol 08, Iss 01, Pp 40-

    Methodological Recommendations for Aspirin-Drug Interaction Studies

    2015  Volume 45

    Abstract: Given the broad application of aspirin as antiplatelet drug, availability of standardized methodology to assess potential interaction with any co-medication on platelet aggregation is desired. We characterized the effect of aspirin (ASA) therapy on ... ...

    Abstract Given the broad application of aspirin as antiplatelet drug, availability of standardized methodology to assess potential interaction with any co-medication on platelet aggregation is desired. We characterized the effect of aspirin (ASA) therapy on collagen-induced platelet aggregation in whole blood to define such methodology. Collagen-induced platelet whole blood aggregation was assessed in 6 healthy male volunteers on 2 occasions (Day 1, Day 7) using the Chronolog aggregometer. From Day 2 up to Day 7, subjects received a daily oral dose of 75 mg ASA. The relationship between collagen dose and platelet aggregation response was assessed. On Day 1, maximal aggregation was observed at 1 μg/mL collagen (15.3 ± 4.6 Ω) and higher. Reproducible results were obtained without any indication of intra-subject fluctuations. ASA treatment decreased maximal aggregation by 80% and 38% at 0.5 and 2.0 μg/mL collagen, respectively. Power calculations were performed based on the observed intra-subject variability and demonstrated minimal sample sizes of 9 - 11 subjects for future cross-over ASA-drug interaction studies exploring effects on platelet aggregation, which demonstrates that the proposed collagen-induced ex vivo whole blood platelet aggregation is a feasible methodology to evaluate ASA-drug interactions in healthy volunteers.
    Keywords Platelet Aggregation ; Impedance Aggregometry ; Whole Blood ; Collagen ; Aspirin Interaction ; Medicine (General) ; R5-920 ; Medicine ; R
    Language English
    Publishing date 2015-01-01T00:00:00Z
    Publisher Scientific Research Publishing
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  7. Article ; Online: Immunomonitoring of Tacrolimus in Healthy Volunteers

    Aliede E. in ‘t Veld / Hendrika W. Grievink / Mahdi Saghari / Frederik E. Stuurman / Marieke L. de Kam / Aiko P. J. de Vries / Brenda C. M. de Winter / Jacobus Burggraaf / Adam F. Cohen / Matthijs Moerland

    International Journal of Molecular Sciences, Vol 20, Iss 19, p

    The First Step from PK- to PD-Based Therapeutic Drug Monitoring?

    2019  Volume 4710

    Abstract: Therapeutic drug monitoring is routinely performed to maintain optimal tacrolimus concentrations in kidney transplant recipients. Nonetheless, toxicity and rejection still occur within an acceptable concentration-range. To have a better understanding of ... ...

    Abstract Therapeutic drug monitoring is routinely performed to maintain optimal tacrolimus concentrations in kidney transplant recipients. Nonetheless, toxicity and rejection still occur within an acceptable concentration-range. To have a better understanding of the relationship between tacrolimus dose, tacrolimus concentration, and its effect on the target cell, we developed functional immune tests for the quantification of the tacrolimus effect. Twelve healthy volunteers received a single dose of tacrolimus, after which intracellular and whole blood tacrolimus concentrations were measured and were related to T cell functionality. A significant correlation was found between tacrolimus concentrations in T cells and whole blood concentrations (r = 0.71, p = 0.009), while no correlation was found between tacrolimus concentrations in peripheral blood mononuclear cells (PBMCs) and whole blood (r = 0.35, p = 0.27). Phytohemagglutinin (PHA) induced the production of IL-2 and IFNγ, as well as the inhibition of CD71 and CD154 expression on T cells at 1.5 h post-dose, when maximum tacrolimus levels were observed. Moreover, the in vitro tacrolimus effect of the mentioned markers corresponded with the ex vivo effect after dosing. In conclusion, our results showed that intracellular tacrolimus concentrations mimic whole blood concentrations, and that PHA-induced cytokine production (IL-2 and IFNγ) and activation marker expression (CD71 and CD154) are suitable readout measures to measure the immunosuppressive effect of tacrolimus on the T cell.
    Keywords immunosuppressive drugs ; transplantation ; pharmacodynamics ; pharmacokinetics ; tacrolimus ; therapeutic drug monitoring ; immunomonitoring ; Biology (General) ; QH301-705.5 ; Chemistry ; QD1-999
    Subject code 610
    Language English
    Publishing date 2019-09-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  8. Article ; Online: Pharmacodynamic Effects of Topical Omiganan in Patients With Mild to Moderate Atopic Dermatitis in a Randomized, Placebo‐Controlled, Phase II Trial

    Tessa Niemeyer‐van der Kolk / Hein van derWall / Geretta K. Hogendoorn / Rianne Rijneveld / Sascha Luijten / Dirk C.J.G. vanAlewijk / Ellen H.A. van denMunckhof / Marieke L. deKam / Gary L. Feiss / Errol P. Prens / Jacobus Burggraaf / Robert Rissmann / Martijn B.A. vanDoorn

    Clinical and Translational Science, Vol 13, Iss 5, Pp 994-

    2020  Volume 1003

    Abstract: Omiganan is an indolicidin analog with antimicrobial properties that could be beneficial for patients with atopic dermatitis. In this randomized, double‐blind, placebo‐controlled, phase II trial we explored the efficacy, pharmacodynamics, and safety of ... ...

    Abstract Omiganan is an indolicidin analog with antimicrobial properties that could be beneficial for patients with atopic dermatitis. In this randomized, double‐blind, placebo‐controlled, phase II trial we explored the efficacy, pharmacodynamics, and safety of topical omiganan once daily in 36 patients with mild to moderate atomic dermatitis. Patients were randomized to apply topical omiganan 1%, omiganan 2.5%, or vehicle gel to one target lesion once daily for 28 consecutive days. Small but significant improvements in local objective SCORing Atopic Dematitis index and morning itch were observed in the omiganan 2.5% group compared with the vehicle gel group (−18.5%; 95% confidence interval, −32.9 to −1.0; P = 0.04; and −8.2; 95% confidence interval, −16.3 to −0.2; P = 0.05, respectively). A shift from lesional to nonlesional skin microbiota was observed in both omiganan treatment groups, in contrast to the vehicle group. Thus, treatment with topical omiganan improved dysbiosis in patients with mild to moderate atopic dermatitis, and small but statistically significant improvements in clinical scores were detected. Our findings warrant further exploration in future clinical trials.
    Keywords Therapeutics. Pharmacology ; RM1-950 ; Public aspects of medicine ; RA1-1270
    Subject code 610
    Language English
    Publishing date 2020-09-01T00:00:00Z
    Publisher Wiley
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  9. Article ; Online: Sputum RNA signature in allergic asthmatics following allergen bronchoprovocation test

    Rob G.J.A. Zuiker / Catherine Tribouley / Zuzana Diamant / J. Diderik Boot / Adam F. Cohen / K. Van Dyck / I. De Lepeleire / Veronica M. Rivas / Vladislav A. Malkov / Jacobus Burggraaf / Marcella K. Ruddy

    European Clinical Respiratory Journal, Vol 3, Iss 0, Pp 1-

    2016  Volume 17

    Abstract: Background: Inhaled allergen challenge is a validated disease model of allergic asthma offering useful pharmacodynamic assessment of pharmacotherapeutic effects in a limited number of subjects. Objectives: To evaluate whether an RNA signature can be ... ...

    Abstract Background: Inhaled allergen challenge is a validated disease model of allergic asthma offering useful pharmacodynamic assessment of pharmacotherapeutic effects in a limited number of subjects. Objectives: To evaluate whether an RNA signature can be identified from induced sputum following an inhaled allergen challenge, whether a RNA signature could be modulated by limited doses of inhaled fluticasone, and whether these gene expression profiles would correlate with the clinical endpoints measured in this study. Methods: Thirteen non-smoking, allergic subjects with mild-to-moderate asthma participated in a randomised, placebo-controlled, 2-period cross-over study following a single-blind placebo run-in period. Each period consisted of three consecutive days, separated by a wash-out period of at least 3 weeks. Subjects randomly received inhaled fluticasone ((FP) MDI; 500 mcg BID×5 doses in total) or placebo. On day 2, house dust mite extract was inhaled and airway response was measured by FEV1 at predefined time points until 7 h post-allergen. Sputum was induced by NaCl 4.5%, processed and analysed at 24 h pre-allergen and 7 and 24 h post-allergen. RNA was isolated from eligible sputum cell pellets (<80% squamous of 500 cells), amplified according to NuGEN technology, and profiled on Affymetrix arrays. Gene expression changes from baseline and fluticasone treatment effects were evaluated using a mixed effects ANCOVA model at 7 and at 24 h post-allergen challenge. Results: Inhaled allergen-induced statistically significant gene expression changes in sputum, which were effectively blunted by fluticasone (adjusted p<0.025). Forty-seven RNA signatures were selected from these responses for correlation analyses and further validation. This included Th2 mRNA levels for cytokines, chemokines, high-affinity IgE receptor FCER1A, histamine receptor HRH4, and enzymes and receptors in the arachidonic pathway. Individual messengers from the 47 RNA signatures correlated significantly with lung function and sputum eosinophil counts. Conclusion: Our RNA extraction and profiling protocols allowed reproducible assessments of inflammatory signatures in sputum including quantification of drug effects on this response in allergic asthmatics. This approach offers novel possibilities for the development of pharmacodynamic (PD) biomarkers in asthma.
    Keywords allergen bronchial provocation test ; asthma ; sputum ; Th2 inflammation ; DNA microarray ; fluticasone ; Medicine ; R
    Subject code 610
    Language English
    Publishing date 2016-07-01T00:00:00Z
    Publisher CoAction
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  10. Article ; Online: A zwitterionic near-infrared fluorophore for real-time ureter identification during laparoscopic abdominopelvic surgery

    Kim S. de Valk / Henricus J. Handgraaf / Marion M. Deken / Babs G. Sibinga Mulder / Adrianus R. Valentijn / Anton G. Terwisscha van Scheltinga / Joeri Kuil / Michiel J. van Esdonk / Jaap Vuijk / Rob F. Bevers / Koen C. Peeters / Fabian A. Holman / John V. Frangioni / Jacobus Burggraaf / Alexander L. Vahrmeijer

    Nature Communications, Vol 10, Iss 1, Pp 1-

    2019  Volume 6

    Abstract: Iatrogenic injury of the ureters is a feared complication of laparoscopic abdominal surgery. Here the authors present the NIR fluorophore ZW800-1 as an intraoperative imaging agent for ureter mapping, showing its safety, pharmacokinetic properties, and ... ...

    Abstract Iatrogenic injury of the ureters is a feared complication of laparoscopic abdominal surgery. Here the authors present the NIR fluorophore ZW800-1 as an intraoperative imaging agent for ureter mapping, showing its safety, pharmacokinetic properties, and efficacy in healthy volunteers and patients undergoing abdominopelvic surgery.
    Keywords Science ; Q
    Language English
    Publishing date 2019-07-01T00:00:00Z
    Publisher Nature Publishing Group
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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