Publications by authors named "Michael Kunz"

Background: Renal denervation lowers blood pressure (BP) in patients with uncontrolled hypertension. We conducted an unbiased genomic screen to identify genetic variants that may associate with BP response to renal denervation (RDN).

Methods: Patients (n=268) with uncontrolled resistant hypertension (baseline BP, 166±21/90±15 mm Hg) who underwent endovascular RDN using the Symplicity catheter (Medtronic, Inc, Santa Rosa, CA) were included.

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Background: Ultrasound renal sympathetic denervation (uRDN) reduces blood pressure (BP) in the absence and presence of antihypertensive treatment at 2 months. Beyond 3 years, there is a lack of follow-up data. This study investigated the long-term safety and efficacy of uRDN.

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The human microbiome emerges as a promising reservoir for diagnostic markers and therapeutics. Since host-associated microbiomes at various body sites differ and diseases do not occur in isolation, a comprehensive analysis strategy highlighting the full potential of microbiomes should include diverse specimen types and various diseases. To ensure robust data quality and comparability across specimen types and diseases, we employ standardized protocols to generate sequencing data from 1931 prospectively collected specimens, including from saliva, plaque, skin, throat, eye, and stool, with an average sequencing depth of 5.

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Illegal collecting of wild Venus flytraps (Dionaea muscipula) for the horticultural trade represents a persistent threat to populations of the species across their endemic range in the coastal plain of North and South Carolina (United States). Although wild collecting of Venus flytraps is not a novel threat, there has been very little research on the impacts of collecting on the species' conservation to date or why an illegal trade persists alongside a legal one. We drew on qualitative expert stakeholder elicitation to contextualize the threat of illegal collecting to the long-term conservation of Venus flytraps in relation to other anthropogenic threats.

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Background: Exhaled breath (EB) aerosol was in principle shown to be a suitable matrix for bioanalysis of volatile but also non-volatile compounds. This attracted particular interest in the field of drug analysis. However, a big gap still exists in the understanding how and which drugs and/or their metabolites are excreted into exhaled breath and could thus actually be detected.

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Whereas AI/ML methods were considered experimental tools in clinical development for some time, nowadays they are widely available. However, stakeholders in the health care industry still need to answer the question which role these methods can realistically play and what standards should be adhered to. Clinical research in late-stage clinical development has particular requirements in terms of robustness, transparency and traceability.

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Article Synopsis
  • Steroidal mineralocorticoid receptor antagonists (MRAs) help manage conditions like heart failure and chronic kidney disease by blocking aldosterone, but they may have significant side effects and limited effectiveness in some types of heart failure.
  • New non-steroidal MRAs, like finerenone, show promise in improving outcomes for patients with diabetic nephropathy and heart failure, with guidelines recommending their use in type 2 diabetes and chronic kidney disease.
  • Other investigational drugs, such as baxdrostat and lorundostat, are being tested for their effectiveness in treating resistant hypertension without the adverse effects associated with steroidal MRAs.
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Aims: Clinical guidelines support the use of fixed-dose combinations (FDC) for prevention of cardiovascular disease. Implementation of FDC into clinical care remains challenging, and current population-based data are scarce.

Methods And Results: Claims data on dispensed drugs in an outpatient care setting of approximately 87% of the German population were analysed regarding the use of FDC according to time, age of the insured persons, and active ingredients.

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Background: Catheter-based renal denervation (RDN) reduces blood pressure in hypertension. Urinary peptides are associated with cardiovascular and renal disease and provide prognostic information. We aimed to investigate the effect of RDN on urinary peptide-based classifiers associated with chronic kidney and heart disease and to identify urinary peptides affected by RDN.

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Background: Randomized sham-controlled trials have confirmed the efficacy and safety of catheter-based renal denervation in hypertension. Data on the very long-term effects of renal denervation are scarce.

Aims: This study evaluates the 10-year safety and efficacy of renal denervation in resistant hypertension.

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Background: Artificial intelligence (AI) shows promising potential to enhance human decision-making as synergistic augmented intelligence (AuI), but requires critical evaluation for skin cancer screening in a real-world setting.

Objectives: To investigate the perspectives of patients and dermatologists after skin cancer screening by human, artificial and augmented intelligence.

Methods: A prospective comparative cohort study conducted at the University Hospital Basel included 205 patients (at high-risk of developing melanoma, with resected or advanced disease) and 8 dermatologists.

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Background: Novel creatinine-based equations have recently been proposed but their predictive performance for cardiovascular outcomes in participants at high cardiovascular risk in comparison to the established CKD-EPI 2009 equation is unknown.

Method: In 9361 participants from the United States included in the randomized controlled SPRINT trial, we calculated baseline estimated glomerular filtration rate (eGFR) using the CKD-EPI 2009, CKD-EPI 2021, and EKFC equations and compared their predictive value of cardiovascular events. The statistical metric used is the net reclassification improvement (NRI) presented separately for those with and those without events.

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Objective: Dietary sodium intake represents a risk factor for cardiovascular disease and mortality. The study sought to analyse the sodium content of effervescent dietary supplements and drugs in Germany and the USA.

Design: Comparative cross-sectional study.

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Radio frequency-based renal denervation is a safe and effective way of lowering blood pressure, a common condition associated with high cardiovascular risk. Several catheters have been developed to administer energy to the renal arteries and their side branches, thereby modulating sympathetic renal activity. The Symplicity Flex™ and Symplicity Spyral™ are first- and second-generation devices, respectively, for radio frequency-based renal denervation.

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Article Synopsis
  • The primary aim of rare plant translocation is to establish self-sustaining populations that can endure over time, but most studies only analyze short-term success metrics like survival and reproduction.
  • A comprehensive analysis of 275 monitored at-risk plant translocations revealed that management techniques play a critical role in short-term success, while site attributes and species traits are more significant for long-term population persistence.
  • Key findings indicated that larger founder sizes enhance reproductive potential, whereas poor habitat quality and low seed production in species heighten the risk of extinction in the long run; effective management can help mitigate these challenges.
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Background And Aims: Pharmacovigilance reports, associating hydrochlorothiazide (HCT) with skin cancer, resulted in a significant decrease of HCT prescriptions for hypertension and heart failure. Whether HCT exhibits phototoxic properties thereby causing skin cancer remains unknown. This study aimed to examine the photosensitizing, phototoxic and carcinogenic potential of HCT in a randomized, placebo-controlled, double-blind trial in vivo and also in vitro .

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Background: Renal denervation is optimised when guided by knowledge of nerve distribution.

Aims: We aimed to assess sympathetic nerve distribution along the renal arteries, especially in post-bifurcation vessel segments.

Methods: Renal arteries and surrounding tissue from 10 body donors were collected and examined histologically.

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Article Synopsis
  • This study compared the effectiveness of 2D and 3D convolutional neural networks (CNNs) and dermatologists in detecting melanoma in real-life scenarios, involving 1,690 melanocytic lesions in high-risk patients.
  • The results showed that 3D-CNN outperformed both 2D-CNN and dermatologists in terms of sensitivity (90%) and had a high ROC-AUC score (0.92), although dermatologists and augmented intelligence matched the sensitivity of 3D-CNN while having superior specificity.
  • The 2D-CNN performed poorly with a sensitivity of 70% and specificity of only 40%, indicating that the 3D-CNN is more reliable in early melanoma detection.
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Arterial hypertension is associated with increased morbidity and mortality and research in the field is highly dynamic. This summary reviews the most important clinical trials published in 2022 and early 2023. Findings on new pharmacological approaches to treat resistant hypertension are presented and new knowledge about the optimal timing of the antihypertensive medication intake is discussed.

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Introduction: The worldwide incidence of melanoma has been increasing rapidly in recent decades with Switzerland having one of the highest rates in Europe. Ultraviolet (UV) radiation is one of the main risk factors for skin cancer. Our objective was to investigate UV protective behavior and melanoma awareness in a high-risk cohort for melanoma.

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The translatability of research is highly dependent on models that recapitulate human tissues and organs. Here, we describe a procedure for the generation of human epidermis organotypic cultures (HEOCs) from primary keratinocytes isolated from foreskin and adult skin as well as from an immortalized keratinocyte cell line (KerTr). We tested several media conditions to develop a defined HEOC growing and expansion media.

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Introduction: Hydrochlorothiazide (HCT) has been suggested to induce photosensitivity, thereby increasing the incidence of skin cancers. After a pharmacovigilance alert, HCT was frequently withdrawn or substituted by other diuretics. The aim of this study was to compare the association of exposure to HCT with cancer risk versus alternative diuretics.

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