Alexander Kiefer

ORCID: 0000-0003-2492-8850
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About
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Research Areas
  • Asthma and respiratory diseases
  • IL-33, ST2, and ILC Pathways
  • Respiratory viral infections research
  • Neonatal Respiratory Health Research
  • Cystic Fibrosis Research Advances
  • Immune Cell Function and Interaction
  • Pediatric health and respiratory diseases
  • Pneumonia and Respiratory Infections
  • Medical Imaging Techniques and Applications
  • Congenital Diaphragmatic Hernia Studies
  • Musculoskeletal pain and rehabilitation
  • Respiratory and Cough-Related Research
  • Radiomics and Machine Learning in Medical Imaging
  • Tracheal and airway disorders
  • MRI in cancer diagnosis
  • COVID-19 Clinical Research Studies
  • Foreign Body Medical Cases
  • Viral gastroenteritis research and epidemiology
  • Kawasaki Disease and Coronary Complications
  • Radiation Dose and Imaging
  • Scoliosis diagnosis and treatment
  • Spine and Intervertebral Disc Pathology
  • Airway Management and Intubation Techniques
  • Chronic Obstructive Pulmonary Disease (COPD) Research
  • Signaling Pathways in Disease

University of Regensburg
2021-2025

Universitätsklinikum Erlangen
2016-2024

Krankenhaus Barmherzige Brüder
2020-2024

Klinik und Poliklinik für Kinder- und Jugendmedizin
2023

St. Hedwig-Krankenhaus
2020

Universitätskinderklinik
2020

Kinderklinik Regensburg
2020

Friedrich-Alexander-Universität Erlangen-Nürnberg
2011-2020

Saarland University
2018

München Klinik Neuperlach
2003

Ahmet Uluer Gordon MacGregor Pilar Azevedo V. Indihar Claire Keating and 95 more Marcus Mall Edward F. McKone Bonnie W. Ramsey Steven M. Rowe Ronald C. Rubenstein Jennifer L. Taylor‐Cousar Elizabeth Tullis Lael M. Yonker Chenghao Chu Anna P. Lam Nitin Nair Patrick R. Sosnay Simon Tian Fredrick Van Goor Lakshmi Viswanathan David Waltz Linda T. Wang Yingmei Xi Joanne Billings Alex Horsley Alex Horsley E.F. Nash Marleen Bakker Eva Van Braeckel Petrus Merkus Christof J. Majoor Karen McCoy Joanne Billings Krishna Pancham James Tolle Bryon Quick Ahmet Uluer Emily DiMango A. Vijaya Rao Santiago Reyes Ross C. Klingsberg Celeste Barreto Victor E. Ortega Donna Beth Willey‐Courand C. Schwarz Sivagurunathan Sutharsan Rainald Fischer Jane C. Davies J. Duckers Alex Horsley Simon Doe E.F. Nash Marleen Bakker Harry Heijerman Eva Van Braeckel Petrus Merkus Christof J. Majoor George M. Solomon Christian A. Merlo Jennifer Griffonnet Joseph M. Pilewski Jordan Dunitz Saba Sheikh Ronald C. Rubenstein Daniel Rosenbluth Theodore G. Liou M. Indihar Krishna Pancham Lael M. Yonker Samya Z. Nasr Jennifer Griffonnet Cynthia D. Brown Gregory S. Sawicki Jennifer Ruddy Emily DiMango Bryan Garcia Andrew T. Braun Alex H. Gifford Nighat Mehdi Maria Tupayachi Ortiz Raksha Jain Francisco J. Calimano Jimmy Johannes Cori Daines Jason Fullmer Joel Mermis Christopher Barrios Ngoc P. Ly Brian Casserly Stephan Eisenmann Helge Hebestreit Alexander Kiefer Sivagurunathan Sutharsan Rainald Fischer Gordon MacGregor D. Peckham M.J. Ledson Eva Van Braeckel Petrus Merkus Noel G. McElvaney

10.1016/s2213-2600(22)00504-5 article EN cc-by-nc-nd The Lancet Respiratory Medicine 2023-02-23
Sivagurunathan Sutharsan Stefanie Dillenhoefer Matthias Welsner Florian Stehling Folke Brinkmann and 95 more Manuel Burkhart Helmut Ellemunter Anna‐Maria Dittrich Christina Smaczny Olaf Eickmeier Matthias Kappler C. Schwarz Sarah Sieber Susanne Naehrig Lutz Naehrlich Klaus Tenbrock Claus Pfannenstiel Dirk Steffen Jochen Meister Britta Welzenbach Anette Scharschinger Markus Kratz Maike Pincus Tobias Tenenbaum Mirjam Stahl Kerstin Landwehr Stefanie Dillenhöfer Hans Kössel Petra Kaiser M. Käding Simone Stolz Stefan Blaas J. Hammermann Monika Gappa Antje Schuster Dana Spittel Sabine Zirlik Sabina Schmitt Florian Stehling Sivagurunathan Sutharsan Joachim Bargon Malte Cremer Christina Smaczny Sebastian Fähndrich Andrea Heinzmann Lutz Nährlich Stefan Kuhnert Sebastian Schmidt B Wollschläger Anna Nolde Inka Held Wolfgang Kamin Felix C. Ringshausen Anna‐Maria Dittrich Sabine Wege Olaf Sommerburg Norbert Geier Sara Lisa Fleser Heinrike Wilkens Helmut Ellemunter Michael Lorenz Paul A. Vöhringer Martin Schebek Christian Timke Ingrid Bobis Thomas Nüßlein Doris Dieninghoff Ernst Rietschel Bastian Klinkhammer Freerk Prenzel Alexandra Wald Axel Kempa Folke Brinkmann Eva Lücke Ines Adams Krystyna Poplawska Simone Lehmkühler Monika Bauck Anne Pfülb Rainald Fischer Gudrun Schopper Susanne Nährig Matthias Griese Jörg Grosse P Küster Birte KinderHolger Köster Susanne Büsing Margarethe Pohl C. Schwarz A. Artlich Alexander Kiefer Manfred Ballmann Nikola Gjorgjevski Markus A. Rose Friederike Ruf Rolf Mahlberg Wolfgang Thomas Ute Graepler Sebastian F. N. Bode hilipp Meyn

Treatment with elexacaftor/tezacaftor/ivacaftor (ETI) improves multiple clinical outcomes in people cystic fibrosis (pwCF) at least one F508del allele. This study evaluated the real-world impact of ETI on lung function, nutritional status, pulmonary exacerbation frequency, and sweat chloride concentrations a large group pwCF.This observational cohort used data from German CF Registry for pwCF who received therapy were followed up period 12 months.The included 2645 67 centres Germany (mean...

10.1016/j.lanepe.2023.100690 article EN cc-by The Lancet Regional Health - Europe 2023-07-28

We analysed the influence of rhinovirus (RV) in nasopharyngeal fluid (NPF) on type I and III interferon (IFN) responses ( e.g. IFN-α IFN - λ) their signal transduction, at baseline during disease exacerbation, cohorts pre-school children with without asthma. At time recruitment into Europe-wide study PreDicta, symptoms, NPF was collected local RV colonisation analysed. Peripheral blood mononuclear cells (PBMCs) were challenged vitro or not. RNA by quantitative real-time PCR gene arrays....

10.1183/13993003.00969-2016 article EN European Respiratory Journal 2016-11-11
Sachin Ananth Adekunle Olatayo Adeoti Animesh Ray Peter G. Middleton Miquel B. Ekkelenkamp and 95 more Stephanie Thee Anand Shah A Fadeyi A.R. Ouédraogo Addishiwot Melesse Seminew Adele Roux Adnan Zafar Aizhamal Tabyshova Aleksandra Barać Alex Gileles‐Hillel Alexander Kiefer Alexandra Hebestreit Alice Tebboth Amelia Shoemark Ana Machado André Silva Andrea Gramegna Andriy Serediuk Angela C. Tramontano A. Salina Annie Navarro Anand Prakash A. Pedro Gonçalves Aran Singanayagam Arun H. Mahadevaiah Anitha Muthusami Avinash Aujayeb Ayşe Önal Aral Barbara C. Kahl Ben Huggon B. О. Pereviznyk Ben Vidal Bukar Bakki Bülent Karadağ Bushra Urooj Ahmed Calmés Doriane Cao Pham Ha Giang Carmelo Sofia Catia Cillóniz Cátia Paixão Charl Verwey Charles Feldman Charlotte Carter Chiara Premuda Chilota Chibuife Efobi Clementine Fraser Corentine Alauzet Damir Vukoja Danial Naqvi Daniela Maria Cirillo D. Marghlani Daryl Butler David Abelson David Stickells Deepa Shrestha Deepa Patel Devesh Dhasmana Devi Jyoti Dash Diana Ergle Dilara Ömer Topçu Dominic L. Sykes Dorina Esendağlı Tatiana Dumitraş Efthymia Papadopoulou Elsa Branco Eva Van Braeckel Evans Frexon Liseki Evie Robson Fapohunda Temitope Victoria Maria de Fatima Magalhaes Gonzaga Felix Bongomin Felix C. Ringshausen Felix Manyeruke F. Frost Friso de Weert Garante Carmela Melania Garry McDonald Geneviève Héry-Arnaud Giancarlo De Leo Gina Amanda G. Piatti G. Manfredini Grillon Antoine Guillaume Thouvenin Gunar Günther Hélida Conceição Cavalcante Torres Helle Krogh Johansen Henny Azmanov Hussein Elkhayat H Ahmed I. Clifton Ignacio Martín‐Loeches Indiane Putri Ningtias Inês L. Azevedo Inge Muylle

Abstract Background and objective Antimicrobial resistance (AMR) is a global crisis, however, relatively little known regarding its impact in chronic respiratory disease the specific challenges faced by healthcare workers across world this field. We aimed to assess worker views on they face AMR disease. Methods An online survey was sent globally working through European Respiratory Society clinical research collaboration (AMR-Lung) focussed lung Responses from different geographic regions...

10.1186/s13756-025-01515-8 article EN cc-by Antimicrobial Resistance and Infection Control 2025-01-22

Summary Background Respiratory syncytial virus (RSV) is one of the main causes morbidity in infants and young children worldwide. Current data on RSV-associated disease burden Germany before introduction new immunization strategies lacking. Methods The PAPI study a multicenter, prospective surveillance lower respiratory tract infections (LRTI) aged ≤ 24 months Germany. Results Data from 1607 with LRTI hospitalized twelve German hospitals between September 2021 May 2023 were analyzed. Among...

10.1007/s15010-025-02484-1 article EN cc-by Infection 2025-02-19
Svenja Dreßen Josephine Schneider Maren Doenhardt Natalie Diffloth Tobias Tenenbaum and 95 more Dominik T. Schneider Andreas Trotter Nicole Toepfner Reinhard Berner Tobias Ankermann Felicitas Anselmino Stefan Arens Sven Armbrust Volker Arpe E. Bach Gerald Beier Christiane Bell Martin Berghäuser Melanie Bergmann Sonja Bernlochner Alexander Bey Anke Beyersdorff Julia Blumör Jasmin Brühler Reinhard Bullmann Reimer Conzelmann Roland Degener Catharina Dobberschütz Thomas Eckardt Torsten Ehrchen Christoph Ehrsam M. Endmann Florian Epple Michael Fedlmeier Holger Freymann Marianne Funken Marie Gah Viola Gerstmann Christine Goletz Tatiana Görhardt Katrin Gröger Julia Handermann M. Haug Solvej Heidtmann M Heine M Henschen Alexander Herz Mirjam Höfgen D. Hubert Birte Hunfeld Conny Huster Katja Hüwe Kristin Jähnert Daniela Jerzyk Petra Kaiser‐Labusch Marcus Kania Jens Kästner Margit Kellerer Svetlana Kelzon Christoph Kemen Matthias Kettwig Alexander Kiefer Karoline kinkelin Andreas Klein Christoph Klein Anna-Lisa Kleinmaier Katharina Kliemann Jan Knechtel Felix Knirsch Louise Kobelt Barbara Korinth E. Kougioumtzi Georgia Koukli Benno Kretzschmar J Kugler Martin Landauer Alfred Längler Tina Liebscher Vincenzo Lionetti Daniela Lubitz Anna-Lena Lubojanski Sa Luo Julia Lutsch Friederike Mattay Anja K. Mayer M. Meusel U. Meyer Marko Mohorovicic Johanna Mösler-Tuczek Annika Müller Sven Nipken U. PINDUR Erika Plattner Simone Pötzsch Lutz Pross Andreas Rößlein Meike Rumpf Jörn Schamell Norbert Schmeja Juliane Schmid

Abstract Purpose During fall 2021, children’s hospitals in Germany faced a surge RSV-related hospitalizations, whereas during fall/winter 2022–2023, RSV and influenza infections both led to increased inpatient admissions. Our study prospectively assessed severe acute respiratory infections, their causative pathogens, the resulting disease burden on German children's for 2023–2024 season. Methods From October 3, 2023 through April 16, 2024, children hospitalized with ARI as primary diagnosis...

10.1007/s15010-025-02494-z article EN cc-by Infection 2025-03-11

Vitamin D3 (VitD3) is known to have immunomodulatory functions, and VitD3 deficiency associated with more severe asthma.We aimed assess the immunoregulatory effects of food supplementation on asthma manifestation, particular focus T cells type 2 innate lymphoid cells.Preschool children adult asthmatic cohorts were analyzed in context serum levels. In a murine model ovalbumin-induced asthma, diet sufficiency immune mechanisms investigated.We found less better-controlled phenotypes along...

10.1016/j.jacig.2023.100099 article EN cc-by-nc-nd Journal of Allergy and Clinical Immunology Global 2023-03-25

Abstract Here we investigated the relationship between local bacterial colonization and anti-bacterial immune responses in pre-school asthmatic control children within EU-wide study PreDicta. In this cohort of children, nasopharyngeal with Gram-negative bacteria such as Haemophilus influenzae Moraxella catarrhalis was found to be associated highest interferon beta (IFNβ) IL-33 levels nasal pharyngeal fluids (NPF). IL33R-ST2 induced blood additional Gram + nasopharynx (Gr+/−). Furthermore,...

10.1038/srep43426 article EN cc-by Scientific Reports 2017-03-06

Abstract Background The PreDicta cohort was designed to prospectively evaluate wheeze/asthma persistence in preschoolers association with viral/microbial exposures and immunological responses. We present the design demographic/disease characteristics unsupervised predefined phenotypic subgroups at inclusion. Methods is a 2‐year prospective study conducted five European regions, including children 4‐6 years diagnosis of asthma as cases healthy age‐matched controls. At baseline, detailed...

10.1111/pai.12881 article EN Pediatric Allergy and Immunology 2018-03-07

Cystic fibrosis patients suffer from a progressive, often fatal lung disease, which is based on complex interplay between chronic infections, locally accumulating immune cells and pulmonary tissue remodeling. Although group-2 innate lymphoid (ILC2s) act as crucial initiators of inflammation, our understanding their involvement in the pathogenesis cystic remains incomplete. Here we report marked decrease circulating CCR6+ ILC2s blood patients, significantly correlated with high disease...

10.3389/fimmu.2020.00691 article EN cc-by Frontiers in Immunology 2020-05-07

Introduction Interferon (IFN) responses have been reported to be defective in rhinovirus (RV)-induced asthma. The heterodimeric receptor of type I IFN (IFN-α/β) is composed IFN-αR1 and IFN-αR2. Ligand binding the IFN-α/β complex activates signal transducer activator transcription (STAT) proteins STAT1 STAT2 intracellularly. Although III (IFN-λ) binds a different containing IFN-λR1 interleukin-10R2, its triggering leads activation same downstream factors. Here, we analysed effects RV on...

10.1183/13993003.01562-2020 article EN cc-by European Respiratory Journal 2020-12-10

In individuals with cystic fibrosis (CF), colonization methicillin-resistant Staphylococcus aureus (MRSA) was reported to be associated a deterioration of pulmonary disease as reflected by an accelerated decline in lung function. Thus, early eradication MRSA could beneficial these patients. Here, we report on intensified protocol.Since 2012 protocol for the newly acquired has been used our CF Clinic, combining oral rifampicin and fusidic acid, inhaled vancomycin, nasal mupirocin, local...

10.1186/s12890-018-0588-6 article EN cc-by BMC Pulmonary Medicine 2018-01-25

RANTES is implicated in allergic asthma and T cell-dependent clearance of infection. receptor family comprises CCR1, CCR3, CCR5, which are G-protein-coupled receptors consisting seven transmembrane helices. Infections with respiratory viruses like Rhinovirus cause induction production by epithelial cells. Here, we studied the role peripheral blood mononuclear cells cohorts children without validated extended this study to airways adults asthma. We further translated these studies a murine...

10.1016/j.isci.2021.103163 article EN cc-by-nc-nd iScience 2021-09-27

The cytokine interleukin-3 (IL-3) acts on early hematopoietic precursor cells. In humans, Treg cells secrete IL-3 and repress inflammatory except for basophils. present study aims to elucidate the contribution of in development course allergic asthma. We therefore analyzed secretion PBMCs total blood two cohorts pre-school children with without a murine model asthma, we phenotype IL-3-/- mice compared wild-type mice. from asthmatic showed increased secretion, which directly correlated...

10.1016/j.isci.2022.104440 article EN cc-by-nc-nd iScience 2022-05-24

Abstract Background We recently described increased NFATc1, IRF4 , and NIP45 messenger RNA (mRNA) expression in peripheral blood mononuclear cells (PBMCs) of asthmatic children adults with multiple allergies. Objective NFATc2 has been to associate induce interleukin‐4, be inhibited by T‐bet. Here, we analyzed the role adults. Methods PBMCs were isolated from control asthmatics subjects. Some untreated some cultured without phytohemagglutinin. Then, was extracted cytokines measured...

10.1002/iid3.360 article EN cc-by Immunity Inflammation and Disease 2020-10-20

A hallmark of many respiratory conditions is the presence nocturnal symptoms. Nevertheless, especially in children there currently still a huge diagnostic gap detecting nighttime symptoms, which leads to an underestimation frequency clinical practise.We evaluated applicability and determined formal test characteristics LEOSound ® system, device for digital long-time recording automated detection acoustic airway events. Airway sounds were recorded overnight 115 adolescents (1-17 years) with...

10.1002/ppul.25768 article EN cc-by-nc Pediatric Pulmonology 2021-11-20

Software-based image registration can improve the diagnostic value of imaging procedures and is an alternative to hybrid scanners. The aim this study was evaluate anatomical accuracy automatic rigid independently acquired datasets positron emission tomography with 18F-deoxyglucose abdominal magnetic resonance imaging.Analyses were performed on 28 lesions from 20 patients. PET data obtained using a stand-alone camera in 14 cases PET/CT scanner 9 cases. T1- T2-weighted MRI scans 1.5 T mean...

10.3413/nukmed-0364 article EN Nuklearmedizin - NuclearMedicine 2011-01-01
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