1
|
Nayak L, Bettegowda C, Scherer F, Galldiks N, Ahluwalia M, Baraniskin A, von Baumgarten L, Bromberg JEC, Ferreri AJM, Grommes C, Hoang-Xuan K, Kühn J, Rubenstein JL, Rudà R, Weller M, Chang SM, van den Bent MJ, Wen PY, Soffietti R. Liquid biopsy for improving diagnosis and monitoring of CNS lymphomas: a RANO review. Neuro Oncol 2024:noae032. [PMID: 38598668 DOI: 10.1093/neuonc/noae032] [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: 12/01/2023] [Indexed: 04/12/2024] Open
Abstract
BACKGROUND The utility of liquid biopsies is well documented in several extracranial and intracranial (brain/leptomeningeal metastases, gliomas) tumors. METHODS The RANO (Response Assessment in Neuro-Oncology) group has set up a multidisciplinary Task Force to critically review the role of blood and CSF-liquid biopsy in central nervous system lymphomas, with a main focus on primary central nervous system lymphomas (PCNSL). RESULTS Several clinical applications are suggested: diagnosis of PCNSL in critical settings (elderly or frail patients, deep locations, steroids responsiveness), definition of minimal residual disease, early indication of tumor response or relapse following treatments and prediction of outcome. CONCLUSIONS Thus far, no clinically validated circulating biomarkers for managing both primary and secondary CNS lymphomas exist. There is need of standardization of biofluid collection, choice of analytes and type of technique to perform the molecular analysis. The various assays should be evaluated through well organized central testing within clinical trials.
Collapse
Affiliation(s)
- Lakshmi Nayak
- Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA
| | - Chetan Bettegowda
- Johns Hopkins University School of Medicine, Department of Neurosurgery
| | - Florian Scherer
- Department of Medicine I, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Norbert Galldiks
- Department of Neurology, University of Cologne, Medical Faculty and University Hospital Cologne, Center for Integrated Oncology Aachen Bonn Cologne Duesseldorf (CIO ABCD), and Institute of Neuroscience and Medicine (INM-3), Research Center Juelich, Juelich, Germany
| | - Manmeet Ahluwalia
- Rose and Ella Burkhardt Brain Tumor and Neuro-Oncology Center, Cleveland Clinic, Cleveland OH and Miami Cancer Institute, Baptist Health South Florida, International University, Miami FL, USA
| | - Alexander Baraniskin
- Department of Hematology, Oncology and Palliative Care, Evangelisches Krankenhaus Hamm, Hamm, Germany
| | - Louisa von Baumgarten
- Department of Neurosurgery, Ludwig-Maximilians-University of Munich, Munich, Germany & German Cancer Consortium, Partner Site Munich, Munich, Germany
| | | | - Andrés J M Ferreri
- Università Vita-Salute San Raffaele and IRCCS San Raffaele Scientific Institute, Milano, Italy
| | - Christian Grommes
- Christian Grommes, Department of Neurology, Memorial Sloan Kettering Cancer Center, New York and Department of Neurology, Weill Cornell Medical College, New York, USA
| | - Khê Hoang-Xuan
- APHP, Department of Neuro-oncology, Groupe Hospitalier Pitié-Salpêtrière; Sorbonne Université; Paris Brain Institute ICM; Paris France
| | - Julia Kühn
- Department of Medicine I, Medical Center University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - James L Rubenstein
- UCSF Hematology/Oncology, Helen Diller Family Comprehensive Cancer Center San Francisco, CA, USA
| | - Roberta Rudà
- Division of Neuro-Oncology, Dept. Neuroscience 'Rita Levi Montalcini', University of Turin, Turin, Italy
| | - Michael Weller
- Department of Neurology, Clinical Neuroscience Center, University Hospital and University of Zurich, Zurich, Switzerland
| | - Susan M Chang
- Department of Neurosurgery and Division of Neuro-Oncology, University of California, San Francisco, USA
| | | | - Patrick Y Wen
- Center for Neuro-Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA, USA
| | - Riccardo Soffietti
- Department of Neuroscience 'Rita Levi Montalcini' University of Turin (R.S.); Candiolo Cancer Institute, FPO-IRCCS, Turin, Italy
| |
Collapse
|
2
|
Kühn J, Brandsch C, Kiourtzidis M, Nier A, Bieler S, Matthäus B, Griehl C, Stangl GI. Microalgae-derived sterols do not reduce the bioavailability of oral vitamin D 3 in mice. INT J VITAM NUTR RES 2023; 93:507-517. [PMID: 36124519 DOI: 10.1024/0300-9831/a000766] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Microalgae have drawn increasing attention as sustainable food sources, also because of their lipid-lowering phytosterols. As phytosterols are also discussed critically regarding their effect on the availability of fat-soluble vitamins, this study aimed to investigate microalgae-derived phytosterols and their effect on vitamin D status. GC-MS analysis showed large variations in the phytosterol profiles of microalgal species. The most frequent sterols were β-sitosterol and stigmasterol. To investigate their effects on vitamin D status, 40 mice were randomized to four groups and fed a vitamin D3-adequate (25 μg/kg) Western-style diet with 0% phytosterols (control) or 1% ergosterol (a fungal sterol not typical for microalgae), β-sitosterol or stigmasterol for four weeks. Contrary to the hypothesis that phytosterols adversely affect vitamin D uptake, mice fed β-sitosterol had significantly higher concentrations of vitamin D3 in plasma (3.15-fold, p<0.01), liver (3.15-fold, p<0.05), and skin (4.12-fold, p<0.005) than the control group. Small increases in vitamin D3 in plasma and skin were also observed in mice fed stigmasterol. In contrast, vitamin D3 levels in the ergosterol and control groups did not differ. The increased tissue levels of vitamin D3 in mice fed β-sitosterol and stigmasterol were not attributable to the observed reduction in liver triglycerides in these groups. The data rather suggest that changes in bile acid profiles were responsible for the beneficial effect of microalgae sterols on the bioavailability of vitamin D3. In conclusion, consumption of microalgae might not adversely affect vitamin D status.
Collapse
Affiliation(s)
- Julia Kühn
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, Halle, Germany
| | - Corinna Brandsch
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, Halle, Germany
| | - Mikis Kiourtzidis
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, Halle, Germany
| | - Anika Nier
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, Halle, Germany
| | - Simone Bieler
- Competence Center Algal Biotechnology, Department of Applied Biosciences and Process Technology, Anhalt University of Applied Sciences, Koethen, Germany
| | - Bertrand Matthäus
- Max Rubner-Institut, Federal Research Institute of Nutrition and Food, Department of Safety and Quality of Cereals, Detmold, Germany
| | - Carola Griehl
- Competence Center Algal Biotechnology, Department of Applied Biosciences and Process Technology, Anhalt University of Applied Sciences, Koethen, Germany
| | - Gabriele I Stangl
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, Halle, Germany
- Competence Cluster for Nutrition and Cardiovascular Health (nutriCARD), Halle-Jena-Leipzig, Germany
| |
Collapse
|
3
|
Lindtner R, Wurm A, Kugel K, Kühn J, Putzer D, Arora R, Coraça-Huber DC, Zelger P, Schirmer M, Badzoka J, Kappacher C, Huck CW, Pallua JD. Comparison of Mid-Infrared Handheld and Benchtop Spectrometers to Detect Staphylococcus epidermidis in Bone Grafts. Bioengineering (Basel) 2023; 10:1018. [PMID: 37760120 PMCID: PMC10525239 DOI: 10.3390/bioengineering10091018] [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: 06/05/2023] [Revised: 08/18/2023] [Accepted: 08/24/2023] [Indexed: 09/29/2023] Open
Abstract
Bone analyses using mid-infrared spectroscopy are gaining popularity, especially with handheld spectrometers that enable on-site testing as long as the data quality meets standards. In order to diagnose Staphylococcus epidermidis in human bone grafts, this study was carried out to compare the effectiveness of the Agilent 4300 Handheld Fourier-transform infrared with the Perkin Elmer Spectrum 100 attenuated-total-reflectance infrared spectroscopy benchtop instrument. The study analyzed 40 non-infected and 10 infected human bone samples with Staphylococcus epidermidis, collecting reflectance data between 650 cm-1 and 4000 cm-1, with a spectral resolution of 2 cm-1 (Agilent 4300 Handheld) and 0.5 cm-1 (Perkin Elmer Spectrum 100). The acquired spectral information was used for spectral and unsupervised classification, such as a principal component analysis. Both methods yielded significant results when using the recommended settings and data analysis strategies, detecting a loss in bone quality due to the infection. MIR spectroscopy provides a valuable diagnostic tool when there is a tissue shortage and time is of the essence. However, it is essential to conduct further research with larger sample sizes to verify its pros and cons thoroughly.
Collapse
Affiliation(s)
- Richard Lindtner
- Department of Orthopaedics and Traumatology, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria; (R.L.); (K.K.); (J.K.); (D.P.); (R.A.); (D.C.C.-H.); (J.D.P.)
| | - Alexander Wurm
- Department of Orthopaedics and Traumatology, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria; (R.L.); (K.K.); (J.K.); (D.P.); (R.A.); (D.C.C.-H.); (J.D.P.)
- Praxis Dr. Med. Univ. Alexander Wurm FA für Orthopädie und Traumatologie, Koflerweg 7, 6275 Stumm, Austria
| | - Katrin Kugel
- Department of Orthopaedics and Traumatology, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria; (R.L.); (K.K.); (J.K.); (D.P.); (R.A.); (D.C.C.-H.); (J.D.P.)
| | - Julia Kühn
- Department of Orthopaedics and Traumatology, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria; (R.L.); (K.K.); (J.K.); (D.P.); (R.A.); (D.C.C.-H.); (J.D.P.)
| | - David Putzer
- Department of Orthopaedics and Traumatology, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria; (R.L.); (K.K.); (J.K.); (D.P.); (R.A.); (D.C.C.-H.); (J.D.P.)
| | - Rohit Arora
- Department of Orthopaedics and Traumatology, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria; (R.L.); (K.K.); (J.K.); (D.P.); (R.A.); (D.C.C.-H.); (J.D.P.)
| | - Débora Cristina Coraça-Huber
- Department of Orthopaedics and Traumatology, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria; (R.L.); (K.K.); (J.K.); (D.P.); (R.A.); (D.C.C.-H.); (J.D.P.)
| | - Philipp Zelger
- University Clinic for Hearing, Voice and Speech Disorders, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria;
| | - Michael Schirmer
- Department of Internal Medicine, Clinic II, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria;
| | - Jovan Badzoka
- Institute of Analytical Chemistry and Radiochemistry, University of Innsbruck, Innrain 80-82, 6020 Innsbruck, Austria; (J.B.); (C.K.); (C.W.H.)
| | - Christoph Kappacher
- Institute of Analytical Chemistry and Radiochemistry, University of Innsbruck, Innrain 80-82, 6020 Innsbruck, Austria; (J.B.); (C.K.); (C.W.H.)
| | - Christian Wolfgang Huck
- Institute of Analytical Chemistry and Radiochemistry, University of Innsbruck, Innrain 80-82, 6020 Innsbruck, Austria; (J.B.); (C.K.); (C.W.H.)
| | - Johannes Dominikus Pallua
- Department of Orthopaedics and Traumatology, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria; (R.L.); (K.K.); (J.K.); (D.P.); (R.A.); (D.C.C.-H.); (J.D.P.)
| |
Collapse
|
4
|
Nowakowska J, Cameron DR, De Martino A, Kühn J, Le Fresne-Languille S, Leuillet S, Amouzou Y, Wittke F, Carton T, Le Vacon F, Chaves RL, Nicolas-Metral V, Vuagniaux G. Evaluation of the microbiota-sparing properties of the anti-staphylococcal antibiotic afabicin. J Antimicrob Chemother 2023:7192828. [PMID: 37294305 PMCID: PMC10393889 DOI: 10.1093/jac/dkad181] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2023] [Accepted: 05/23/2023] [Indexed: 06/10/2023] Open
Abstract
BACKGROUND Antibiotic use is associated with collateral damage to the healthy microbiota. Afabicin is a first-in-class prodrug inhibitor of the FabI enzyme that, when converted to the pharmacologically active agent afabicin desphosphono, demonstrates a staphylococcal-specific spectrum of activity. An expected benefit of highly targeted antibiotics such as afabicin is microbiome preservation. OBJECTIVES To compare the effects of oral treatment with afabicin and standard-of-care antibiotics upon the murine gut microbiota, and to assess the effects of oral afabicin treatment on the human gut microbiota. METHODS Gut microbiota effects of a 10 day oral course of afabicin treatment were monitored in mice and compared with clindamycin, linezolid and moxifloxacin at human-equivalent dose levels using 16S rDNA sequencing. Further, the gut microbiota of healthy volunteers was longitudinally assessed across 20 days of oral treatment with afabicin 240 mg twice daily. RESULTS Afabicin treatment did not significantly alter gut microbiota diversity (Shannon H index) or richness (rarefied Chao1) in mice. Only limited changes to taxonomic abundances were observed in afabicin-treated animals. In contrast, clindamycin, linezolid and moxifloxacin each caused extensive dysbiosis in the murine model. In humans, afabicin treatment was not associated with alterations in Shannon H or rarefied Chao1 indices, nor relative taxonomic abundances, supporting the findings from the animal model. CONCLUSIONS Oral treatment with afabicin is associated with preservation of the gut microbiota in mice and healthy subjects.
Collapse
Affiliation(s)
- J Nowakowska
- Translational Medicine Department, Debiopharm International SA, Chemin Messidor 5-7, 1006 Lausanne, Switzerland
| | - D R Cameron
- Translational Medicine Department, Debiopharm International SA, Chemin Messidor 5-7, 1006 Lausanne, Switzerland
| | - A De Martino
- Research and Development Department, Biofortis SAS, 3 route de la Chatterie, 44800 Saint-Herblain, France
| | - J Kühn
- Translational Medicine Department, Debiopharm International SA, Chemin Messidor 5-7, 1006 Lausanne, Switzerland
| | - S Le Fresne-Languille
- Research and Development Department, Biofortis SAS, 3 route de la Chatterie, 44800 Saint-Herblain, France
| | - S Leuillet
- Research and Development Department, Biofortis SAS, 3 route de la Chatterie, 44800 Saint-Herblain, France
| | - Y Amouzou
- Research and Development Department, Biofortis SAS, 3 route de la Chatterie, 44800 Saint-Herblain, France
| | - F Wittke
- Clinical Development Department, Debiopharm International SA, Chemin Messidor 5-7, 1006 Lausanne, Switzerland
| | - T Carton
- Research and Development Department, Biofortis SAS, 3 route de la Chatterie, 44800 Saint-Herblain, France
| | - F Le Vacon
- Research and Development Department, Biofortis SAS, 3 route de la Chatterie, 44800 Saint-Herblain, France
| | - R L Chaves
- Clinical Development Department, Debiopharm International SA, Chemin Messidor 5-7, 1006 Lausanne, Switzerland
| | - V Nicolas-Metral
- Translational Medicine Department, Debiopharm International SA, Chemin Messidor 5-7, 1006 Lausanne, Switzerland
| | - G Vuagniaux
- Translational Medicine Department, Debiopharm International SA, Chemin Messidor 5-7, 1006 Lausanne, Switzerland
| |
Collapse
|
5
|
Liermann W, Halle I, Frahm J, Hüther L, Weigend S, Kühn J, Stangl GI, Dänicke S. Genotype-dependent impact of dietary vitamin D 3 on laying hens. Arch Anim Nutr 2023:1-23. [PMID: 37263588 DOI: 10.1080/1745039x.2023.2212574] [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: 01/05/2023] [Accepted: 05/08/2023] [Indexed: 06/03/2023]
Abstract
Vitamin D3 has an integral part in calcium and phosphorus homoeostasis, which in turn plays a key role in egg production of hens. The present study aimed to investigate whether an additional vitamin D3 supplementation improves the laying performance and egg quality of hens according to their genetic potential. For this purpose, four layer lines (low performing: R11 and L68; high performing: WLA and BLA) supplemented either with 300 or 3000 IU vitamin D3 per kg feed were compared concerning serum 25-hydroxyvitamin D3 (25-OHD3), calcium, phosphorus and alkaline phosphatase (ALP), laying performance and egg quality. The higher supplementation of vitamin D3 increased 25-OHD3 serum concentrations in all genotypes, except for R11 and WLA hens in week 49, and also elevated vitamin D3 and 25-OHD3 content in the egg yolk (p < 0.05). In week 29, 3000 IU vitamin D3 decreased pooled least squares means (LSMeans) of serum calcium concentrations considering all genotypes and increased the ALP concentrations in BLA hens (p < 0.05). Considering the whole experimental period daily egg mass of R11 hens was increased by an additional vitamin D3 supplementation (p < 0.001). Regarding all genotypes and the whole experimental period the pooled LSMeans of breaking strength of eggs from hens fed 3000 IU vitamin D3 were higher than those of hens fed 300 IU (p = 0.044). In conclusion, present results give evidence that the higher vitamin D3 supplementation might have genotype-dependently beneficial effects on calcium and phosphorus homoeostasis of hens, which might improve feed efficiency in the early laying period and promote the persistence of the laying period irrespectively of genotype. The increase of serum 25-OHD3 by the higher vitamin D supplementation supported the higher transfer of vitamin D in the egg yolk and improved genotype-dependently the breaking strength of the eggshell.
Collapse
Affiliation(s)
- Wendy Liermann
- Institute of Nutritional Physiology ("Oskar-Kellner"), Research Institute for Farm Animal Biology (FBN), Dummerstorf, Germany
| | - Ingrid Halle
- Institute of Animal Nutrition, Friedrich-Loeffler-Institut (FLI), Federal Research Institute for Animal Health, Brunswick, Germany
| | - Jana Frahm
- Institute of Animal Nutrition, Friedrich-Loeffler-Institut (FLI), Federal Research Institute for Animal Health, Brunswick, Germany
| | - Liane Hüther
- Institute of Animal Nutrition, Friedrich-Loeffler-Institut (FLI), Federal Research Institute for Animal Health, Brunswick, Germany
| | - Steffen Weigend
- Institute for Animal Genetics, Friedrich-Loeffler-Institut (FLI), Federal Research Institute for Animal Health, Neustadt, Germany
| | - Julia Kühn
- Institute for Animal Genetics, Friedrich-Loeffler-Institut (FLI), Federal Research Institute for Animal Health, Neustadt, Germany
| | - Gabriele I Stangl
- Institute of Agricultural and Nutritional Sciences, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany
| | - Sven Dänicke
- Institute of Animal Nutrition, Friedrich-Loeffler-Institut (FLI), Federal Research Institute for Animal Health, Brunswick, Germany
| |
Collapse
|
6
|
Ewendt F, Schmitt M, Kluttig A, Kühn J, Hirche F, Kraus FB, Ludwig-Kraus B, Mikolajczyk R, Wätjen W, Bürkner PC, Föller M, Stangl GI. Association between vitamin D status and eryptosis-results from the German National Cohort Study. Ann Hematol 2023; 102:1351-1361. [PMID: 37121914 PMCID: PMC10149638 DOI: 10.1007/s00277-023-05239-w] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Accepted: 04/16/2023] [Indexed: 05/02/2023]
Abstract
Vitamin D, besides its classical effect on mineral homeostasis and bone remodeling, can also modulate apoptosis. A special form of apoptosis termed eryptosis appears in erythrocytes. Eryptosis is characterized by cell shrinkage, membrane blebbing, and cell membrane phospholipid disorganization and associated with diseases such as sepsis, malaria or iron deficiency, and impaired microcirculation. To our knowledge, this is the first study that linked vitamin D with eryptosis in humans. This exploratory cross-sectional trial investigated the association between the vitamin D status assessed by the concentration of plasma 25-hydroxyvitamin D (25(OH)D) and eryptosis. Plasma 25(OH)D was analyzed by LC-MS/MS, and eryptosis was estimated from annexin V-FITC-binding erythrocytes by FACS analysis in 2074 blood samples from participants of the German National Cohort Study. We observed a weak but clear correlation between low vitamin D status and increased eryptosis (r = - 0.15; 95% CI [- 0.19, - 0.10]). There were no differences in plasma concentrations of 25(OH)D and eryptosis between male and female subjects. This finding raises questions of the importance of vitamin D status for eryptosis in terms of increased risk for anemia or cardiovascular events.
Collapse
Affiliation(s)
- Franz Ewendt
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, 06120, Halle (Saale), Germany.
| | - Marvin Schmitt
- Cluster of Excellence SimTech, University of Stuttgart, 70569, Stuttgart, Germany
| | - Alexander Kluttig
- Institute of Medical Epidemiology, Biostatistics, and Informatics, Medical Faculty of the Martin Luther University Halle-Wittenberg, 06120, Halle (Saale), Germany
| | - Julia Kühn
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, 06120, Halle (Saale), Germany
| | - Frank Hirche
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, 06120, Halle (Saale), Germany
| | - Frank B Kraus
- Central Laboratory, Department of Laboratory Medicine, University Hospital Halle, 06120, Halle (Saale), Germany
| | - Beatrice Ludwig-Kraus
- Central Laboratory, Department of Laboratory Medicine, University Hospital Halle, 06120, Halle (Saale), Germany
| | - Rafael Mikolajczyk
- Institute of Medical Epidemiology, Biostatistics, and Informatics, Medical Faculty of the Martin Luther University Halle-Wittenberg, 06120, Halle (Saale), Germany
| | - Wim Wätjen
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, 06120, Halle (Saale), Germany
| | | | - Michael Föller
- Department of Physiology, University of Hohenheim, 70599, Stuttgart, Germany
| | - Gabriele I Stangl
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, 06120, Halle (Saale), Germany
| |
Collapse
|
7
|
Sandgruber F, Höger AL, Kunze J, Schenz B, Griehl C, Kiehntopf M, Kipp K, Kühn J, Stangl GI, Lorkowski S, Dawczynski C. Impact of Regular Intake of Microalgae on Nutrient Supply and Cardiovascular Risk Factors: Results from the NovAL Intervention Study. Nutrients 2023; 15:nu15071645. [PMID: 37049486 PMCID: PMC10097350 DOI: 10.3390/nu15071645] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Revised: 03/25/2023] [Accepted: 03/26/2023] [Indexed: 03/30/2023] Open
Abstract
A 14-day randomized controlled study with a parallel design was conducted with 80 healthy participants. Intervention groups I (IG1) and II (IG2) received a defined background diet and consumed a smoothie enriched with either 15 g of Chlorella dry weight (d.w.) or 15 g of Microchloropsis d.w. daily. Control group II (CG2) received a defined background diet without the smoothie. Control group I (CG1) received neither. Blood samples and 24-h urine were collected at the beginning and the end of the study. Serum concentrations of 25-hydroxyvitamin D3, vitamin D3, selenium, iron, ferritin, transferrin saturation, total cholesterol, low-density lipoprotein (LDL) cholesterol, high-density lipoprotein (HDL) cholesterol, non-HDL cholesterol and the LDL-cholesterol/HDL cholesterol ratio decreased in IG1 (p < 0.05), while 25-hydroxyvitamin D2 increased (p < 0.05). In IG2, vitamin D3, 25-hydroxyvitamins D2 and D3 decreased (p < 0.05), while concentrations of fatty acids C20:5n3 and C22:5n3 increased. Serum and urine uric acid increased in IG1 and IG2 (p < 0.05). Microchloropsis is a valuable source of n3 fatty acids, as is Chlorella of vitamin D2. Regular consumption of Chlorella may affect the iron and selenium status negatively but may impact blood lipids positively. An elevated uric acid concentration in blood and urine following the regular consumption of microalgae poses potential risks for human health.
Collapse
Affiliation(s)
- Fabian Sandgruber
- Junior Research Group Nutritional Concepts, Institute of Nutritional Sciences, Friedrich Schiller University Jena, Dornburger Str. 29, 07743 Jena, Germany; (F.S.); (J.K.); (B.S.)
- Competence Cluster for Nutrition and Cardiovascular Health (nutriCARD) Halle-Jena-Leipzig, Dornburger Str. 25, 07743 Jena, Germany; (J.K.); (G.I.S.); (S.L.)
| | - Anna-Lena Höger
- Competence Center Algal Biotechnology, Anhalt University of Applied Science, Bernburger Str. 55, 06366 Köthen, Germany; (A.-L.H.); (C.G.)
| | - Julia Kunze
- Junior Research Group Nutritional Concepts, Institute of Nutritional Sciences, Friedrich Schiller University Jena, Dornburger Str. 29, 07743 Jena, Germany; (F.S.); (J.K.); (B.S.)
- Competence Cluster for Nutrition and Cardiovascular Health (nutriCARD) Halle-Jena-Leipzig, Dornburger Str. 25, 07743 Jena, Germany; (J.K.); (G.I.S.); (S.L.)
| | - Benjamin Schenz
- Junior Research Group Nutritional Concepts, Institute of Nutritional Sciences, Friedrich Schiller University Jena, Dornburger Str. 29, 07743 Jena, Germany; (F.S.); (J.K.); (B.S.)
- Competence Cluster for Nutrition and Cardiovascular Health (nutriCARD) Halle-Jena-Leipzig, Dornburger Str. 25, 07743 Jena, Germany; (J.K.); (G.I.S.); (S.L.)
| | - Carola Griehl
- Competence Center Algal Biotechnology, Anhalt University of Applied Science, Bernburger Str. 55, 06366 Köthen, Germany; (A.-L.H.); (C.G.)
| | - Michael Kiehntopf
- Institute of Clinical Chemistry and Laboratory Diagnostics, University Hospital Jena, Am Klinikum 1, 07747 Jena, Germany;
| | - Kristin Kipp
- Department of Pediatrics and Adolescent Medicine, Sophien- and Hufeland Hospital, Henry-Van-De-Velde-Str. 1, 99425 Weimar, Germany;
| | - Julia Kühn
- Competence Cluster for Nutrition and Cardiovascular Health (nutriCARD) Halle-Jena-Leipzig, Dornburger Str. 25, 07743 Jena, Germany; (J.K.); (G.I.S.); (S.L.)
- Institute of Agricultural and Nutritional Science, Martin Luther University Halle-Wittenberg, Von-Danckelmann-Platz 2, 06120 Halle, Germany
| | - Gabriele I. Stangl
- Competence Cluster for Nutrition and Cardiovascular Health (nutriCARD) Halle-Jena-Leipzig, Dornburger Str. 25, 07743 Jena, Germany; (J.K.); (G.I.S.); (S.L.)
- Institute of Agricultural and Nutritional Science, Martin Luther University Halle-Wittenberg, Von-Danckelmann-Platz 2, 06120 Halle, Germany
| | - Stefan Lorkowski
- Competence Cluster for Nutrition and Cardiovascular Health (nutriCARD) Halle-Jena-Leipzig, Dornburger Str. 25, 07743 Jena, Germany; (J.K.); (G.I.S.); (S.L.)
- Institute of Nutritional Sciences, Friedrich Schiller University Jena, Dornburger Str. 25, 07743 Jena, Germany
| | - Christine Dawczynski
- Junior Research Group Nutritional Concepts, Institute of Nutritional Sciences, Friedrich Schiller University Jena, Dornburger Str. 29, 07743 Jena, Germany; (F.S.); (J.K.); (B.S.)
- Competence Cluster for Nutrition and Cardiovascular Health (nutriCARD) Halle-Jena-Leipzig, Dornburger Str. 25, 07743 Jena, Germany; (J.K.); (G.I.S.); (S.L.)
- Correspondence:
| |
Collapse
|
8
|
Mutter JA, Alig SK, Esfahani MS, Lauer EM, Mitschke J, Kurtz DM, Kühn J, Bleul S, Olsen M, Liu CL, Jin MC, Macaulay CW, Neidert N, Volk T, Eisenblaetter M, Rauer S, Heiland DH, Finke J, Duyster J, Wehrle J, Prinz M, Illerhaus G, Reinacher PC, Schorb E, Diehn M, Alizadeh AA, Scherer F. Circulating Tumor DNA Profiling for Detection, Risk Stratification, and Classification of Brain Lymphomas. J Clin Oncol 2023; 41:1684-1694. [PMID: 36542815 PMCID: PMC10419411 DOI: 10.1200/jco.22.00826] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 09/26/2022] [Accepted: 11/08/2022] [Indexed: 12/24/2022] Open
Abstract
PURPOSE Clinical outcomes of patients with CNS lymphomas (CNSLs) are remarkably heterogeneous, yet identification of patients at high risk for treatment failure is challenging. Furthermore, CNSL diagnosis often remains unconfirmed because of contraindications for invasive stereotactic biopsies. Therefore, improved biomarkers are needed to better stratify patients into risk groups, predict treatment response, and noninvasively identify CNSL. PATIENTS AND METHODS We explored the value of circulating tumor DNA (ctDNA) for early outcome prediction, measurable residual disease monitoring, and surgery-free CNSL identification by applying ultrasensitive targeted next-generation sequencing to a total of 306 tumor, plasma, and CSF specimens from 136 patients with brain cancers, including 92 patients with CNSL. RESULTS Before therapy, ctDNA was detectable in 78% of plasma and 100% of CSF samples. Patients with positive ctDNA in pretreatment plasma had significantly shorter progression-free survival (PFS, P < .0001, log-rank test) and overall survival (OS, P = .0001, log-rank test). In multivariate analyses including established clinical and radiographic risk factors, pretreatment plasma ctDNA concentrations were independently prognostic of clinical outcomes (PFS HR, 1.4; 95% CI, 1.0 to 1.9; P = .03; OS HR, 1.6; 95% CI, 1.1 to 2.2; P = .006). Moreover, measurable residual disease detection by plasma ctDNA monitoring during treatment identified patients with particularly poor prognosis following curative-intent immunochemotherapy (PFS, P = .0002; OS, P = .004, log-rank test). Finally, we developed a proof-of-principle machine learning approach for biopsy-free CNSL identification from ctDNA, showing sensitivities of 59% (CSF) and 25% (plasma) with high positive predictive value. CONCLUSION We demonstrate robust and ultrasensitive detection of ctDNA at various disease milestones in CNSL. Our findings highlight the role of ctDNA as a noninvasive biomarker and its potential value for personalized risk stratification and treatment guidance in patients with CNSL. [Media: see text].
Collapse
Affiliation(s)
- Jurik A. Mutter
- Department of Medicine I, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
- University of Freiburg, Faculty of Biology, Freiburg, Germany
| | - Stefan K. Alig
- Divisions of Oncology and Hematology, Department of Medicine, Stanford University, Stanford, CA
| | - Mohammad S. Esfahani
- Divisions of Oncology and Hematology, Department of Medicine, Stanford University, Stanford, CA
| | - Eliza M. Lauer
- Department of Medicine I, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Jan Mitschke
- Department of Medicine I, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - David M. Kurtz
- Divisions of Oncology and Hematology, Department of Medicine, Stanford University, Stanford, CA
| | - Julia Kühn
- Department of Medicine I, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Sabine Bleul
- Department of Medicine I, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Mari Olsen
- Divisions of Oncology and Hematology, Department of Medicine, Stanford University, Stanford, CA
| | - Chih Long Liu
- Divisions of Oncology and Hematology, Department of Medicine, Stanford University, Stanford, CA
| | - Michael C. Jin
- Divisions of Oncology and Hematology, Department of Medicine, Stanford University, Stanford, CA
| | - Charles W. Macaulay
- Divisions of Oncology and Hematology, Department of Medicine, Stanford University, Stanford, CA
| | - Nicolas Neidert
- Department of Neurosurgery, Medical Center—University of Freiburg, Freiburg, Germany
- Berta-Ottenstein-Programme for Clinician Scientists Medical Center, University of Freiburg, Freiburg, Germany
| | - Timo Volk
- Department of Neurology, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Michel Eisenblaetter
- Department of Radiology, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Sebastian Rauer
- Department of Neurology, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Dieter H. Heiland
- Department of Neurosurgery, Medical Center—University of Freiburg, Freiburg, Germany
| | - Jürgen Finke
- Department of Medicine I, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Justus Duyster
- Department of Medicine I, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Julius Wehrle
- Department of Medicine I, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Marco Prinz
- Institute of Neuropathology, Medical Faculty, University of Freiburg, Freiburg, Germany
- Center for Basics in NeuroModulation (NeuroModulBasics), Faculty of Medicine, University of Freiburg, Freiburg, Germany
- Signalling Research Centres BIOSS and CIBSS, University of Freiburg, Freiburg, Germany
| | - Gerald Illerhaus
- Department of Hematology/Oncology and Palliative Care, Klinikum Stuttgart, Stuttgart, Germany
| | - Peter C. Reinacher
- Department of Stereotactic and Functional Neurosurgery, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
- Fraunhofer Institute for Laser Technology (ILT), Aachen, Germany
| | - Elisabeth Schorb
- Department of Medicine I, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Maximilian Diehn
- Department of Radiation Oncology, Stanford School of Medicine, Stanford, CA
| | - Ash A. Alizadeh
- Divisions of Oncology and Hematology, Department of Medicine, Stanford University, Stanford, CA
| | - Florian Scherer
- Department of Medicine I, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
- German Cancer Consortium (DKTK) partner site Freiburg and German Cancer Research Center (DKFZ), Heidelberg, Germany
| |
Collapse
|
9
|
Wurm A, Kühn J, Kugel K, Putzer D, Arora R, Coraça-Huber DC, Zelger P, Badzoka J, Kappacher C, Huck CW, Pallua JD. Raman microscopic spectroscopy as a diagnostic tool to detect Staphylococcus epidermidis in bone grafts. Spectrochim Acta A Mol Biomol Spectrosc 2022; 280:121570. [PMID: 35779474 DOI: 10.1016/j.saa.2022.121570] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 06/02/2022] [Accepted: 06/26/2022] [Indexed: 06/15/2023]
Abstract
INTRODUCTION Raman microscopic spectroscopyis a new approach for further characterization and detection of molecular features in many pathological processes. This technique has been successfully applied to scrutinize the spatial distribution of small molecules and proteins within biological systems by in situ analysis. This study uses Raman microscopic spectroscopyto identify any in-depth benefits and drawbacks in diagnosing Staphylococcus epidermidis in human bone grafts. MATERIAL AND METHODS 40 non-infected human bone samples and 10 human bone samples infected with Staphylococcus epidermidis were analyzed using Raman microscopic spectroscopy. Reflectance data were collected between 200 cm-1 and 3600 cm-1 with a spectral resolution of 4 cm-1 using a Senterra II microscope (Bruker, Ettlingen, Germany). The acquired spectral information was used for spectral and unsupervised classification, such as principal component analysis. RESULTS Raman measurements produced distinct diagnostic spectra that were used to distinguish between non-infected human bone samples and Staphylococcus epidermidis infected human bone samples by spectral and principal component analyses. A substantial loss in bone quality and protein conformation was detected by human bone samples co-cultured with Staphylococcus epidermidis. The mineral-to-matrix ratio using the phosphate/Amide I ratio (p = 0.030) and carbonate/phosphate ratio (p = 0.001) indicates that the loss of relative mineral content in bones upon bacterial infection is higher than in non-infected human bones. Also, an increase of alterations in the collagen network (p = 0.048) and a decrease in the structural organization and relative collagen in infected human bone could be detected. Subsequent principal component analyses identified Staphylococcus epidermidis in different spectral regions, respectively, originating mainly from CH2 deformation (wagging) of protein (at 1450 cm-1) and bending and stretching modes of C-H groups (∼2800-3000 cm-1). CONCLUSION Raman microscopic spectroscopyis presented as a promising diagnostic tool to detect Staphylococcus epidermidis in human bone grafts. Further studies in human tissues are warranted.
Collapse
Affiliation(s)
- A Wurm
- University Hospital for Orthopaedics and Traumatology, Medical University of Innsbruck, Anichstraße 35, 6020, Innsbruck, Austria
| | - J Kühn
- University Hospital for Orthopaedics and Traumatology, Medical University of Innsbruck, Anichstraße 35, 6020, Innsbruck, Austria
| | - K Kugel
- University Hospital for Orthopaedics and Traumatology, Medical University of Innsbruck, Anichstraße 35, 6020, Innsbruck, Austria
| | - D Putzer
- University Hospital for Orthopaedics and Traumatology, Medical University of Innsbruck, Anichstraße 35, 6020, Innsbruck, Austria
| | - R Arora
- University Hospital for Orthopaedics and Traumatology, Medical University of Innsbruck, Anichstraße 35, 6020, Innsbruck, Austria
| | - D C Coraça-Huber
- University Hospital for Orthopaedics and Traumatology, Medical University of Innsbruck, Anichstraße 35, 6020, Innsbruck, Austria
| | - P Zelger
- University Clinic for Hearing, Voice and Speech Disorders, Medical University of Innsbruck, Anichstrasse 35, Innsbruck, Austria
| | - J Badzoka
- Institute of Analytical Chemistry and Radiochemistry, Innsbruck, Austria
| | - C Kappacher
- Institute of Analytical Chemistry and Radiochemistry, Innsbruck, Austria
| | - C W Huck
- Institute of Analytical Chemistry and Radiochemistry, Innsbruck, Austria
| | - J D Pallua
- University Hospital for Orthopaedics and Traumatology, Medical University of Innsbruck, Anichstraße 35, 6020, Innsbruck, Austria.
| |
Collapse
|
10
|
Capelo HL, Kühn J, Pommerol A, Piazza D, Brändli M, Cerubini R, Jost B, Bodénan JD, Planchet T, Spadaccia S, Schräpler R, Blum J, Schönbächler M, Mayer L, Thomas N. TEMPus VoLA: The timed Epstein multi-pressure vessel at low accelerations. Rev Sci Instrum 2022; 93:104502. [PMID: 36319368 DOI: 10.1063/5.0087030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Accepted: 08/07/2022] [Indexed: 06/16/2023]
Abstract
The field of planetary system formation relies extensively on our understanding of the aerodynamic interaction between gas and dust in protoplanetary disks. Of particular importance are the mechanisms triggering fluid instabilities and clumping of dust particles into aggregates, and their subsequent inclusion into planetesimals. We introduce the timed Epstein multi-pressure vessel at low accelerations, which is an experimental apparatus for the study of particle dynamics and rarefied gas under micro-gravity conditions. This facility contains three experiments dedicated to studying aerodynamic processes: (i) the development of pressure gradients due to collective particle-gas interaction, (ii) the drag coefficients of dust aggregates with variable particle-gas velocity, and (iii) the effect of dust on the profile of a shear flow and resultant onset of turbulence. The approach is innovative with respect to previous experiments because we access an untouched parameter space in terms of dust particle packing fraction, and Knudsen, Stokes, and Reynolds numbers. The mechanisms investigated are also relevant for our understanding of the emission of dust from active surfaces, such as cometary nuclei, and new experimental data will help interpreting previous datasets (Rosetta) and prepare future spacecraft observations (Comet Interceptor). We report on the performance of the experiments, which has been tested over the course of multiple flight campaigns. The project is now ready to benefit from additional flight campaigns, to cover a wide parameter space. The outcome will be a comprehensive framework to test models and numerical recipes for studying collective dust particle aerodynamics under space-like conditions.
Collapse
Affiliation(s)
- H L Capelo
- Space Research and Planetary Sciences Division, Physikalisches Institut, University of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland
| | - J Kühn
- Space Research and Planetary Sciences Division, Physikalisches Institut, University of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland
| | - A Pommerol
- Space Research and Planetary Sciences Division, Physikalisches Institut, University of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland
| | - D Piazza
- Space Research and Planetary Sciences Division, Physikalisches Institut, University of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland
| | - M Brändli
- Space Research and Planetary Sciences Division, Physikalisches Institut, University of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland
| | - R Cerubini
- Space Research and Planetary Sciences Division, Physikalisches Institut, University of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland
| | - B Jost
- Space Research and Planetary Sciences Division, Physikalisches Institut, University of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland
| | - J-D Bodénan
- ETH Zurich, Institute of Geochemistry and Petrology, 8092 Zurich, Switzerland
| | - T Planchet
- Space Research and Planetary Sciences Division, Physikalisches Institut, University of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland
| | - S Spadaccia
- Space Research and Planetary Sciences Division, Physikalisches Institut, University of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland
| | - R Schräpler
- Institut fur Geophysik und extraterrestrische Physik, Technische Universitat Braunschweig, Mendelssohnstr. 3, D-38106 Braunschweig, Germany
| | - J Blum
- Institut fur Geophysik und extraterrestrische Physik, Technische Universitat Braunschweig, Mendelssohnstr. 3, D-38106 Braunschweig, Germany
| | - M Schönbächler
- ETH Zurich, Institute of Geochemistry and Petrology, 8092 Zurich, Switzerland
| | - L Mayer
- Center for Theoretical Astrophysics and Cosmology, Institute for Computational Science, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - N Thomas
- Space Research and Planetary Sciences Division, Physikalisches Institut, University of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland
| |
Collapse
|
11
|
Kotwan J, Kühn J, Baur AC, Stangl GI. Oral Intake of Lumisterol Affects the Metabolism of Vitamin D. Mol Nutr Food Res 2021; 65:e2001165. [PMID: 34061442 DOI: 10.1002/mnfr.202001165] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 04/16/2021] [Indexed: 01/01/2023]
Abstract
SCOPE The treatment of food with ultraviolet-B (UV-B) light to increase the vitamin D content is accompanied by the formation of photoisomers, such as lumisterol2 . The physiological impact of photoisomers is largely unknown. METHODS AND RESULTS Three groups of C57Bl/6 mice are fed diets containing 50 µg kg-1 deuterated vitamin D3 with 0, 50 (moderate-dose) or 2000 µg kg-1 (high-dose) lumisterol2 for four weeks. Considerable quantities of lumisterol2 and vitamin D2 are found in the plasma and tissues of mice fed with 2000 µg kg-1 lumisterol2 but not in those fed 0 or 50 µg kg-1 lumisterol2 . Mice fed with 2000 µg kg-1 lumisterol2 showed strongly reduced deuterated 25-hydroxyvitamin D3 (-50%) and calcitriol (-80%) levels in plasma, accompanied by downregulated mRNA abundance of cytochrom P450 (Cyp)27b1 and upregulated Cyp24a1 in the kidneys. Increased tissue levels of vitamin D2 were also seen in mice in a second study that are kept on a diet with 0.2% UV-B exposed yeast versus those fed 0.2% untreated yeast containing iso-amounts of vitamin D2 . CONCLUSION High doses of lumisterol2 can enter the body, induce the formation of vitamin D2 , reduce the levels of 25(OH)D3 and calcitriol and strongly impact the expression of genes involved in the degradation and synthesis of bioactive vitamin D.
Collapse
Affiliation(s)
- Julia Kotwan
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
- Competence Cluster for Nutrition and Cardiovascular Health (nutriCARD) Halle-Jena-Leipzig, Jena, Germany
| | - Julia Kühn
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
| | - Anja C Baur
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
- Competence Cluster for Nutrition and Cardiovascular Health (nutriCARD) Halle-Jena-Leipzig, Jena, Germany
| | - Gabriele I Stangl
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
- Competence Cluster for Nutrition and Cardiovascular Health (nutriCARD) Halle-Jena-Leipzig, Jena, Germany
| |
Collapse
|
12
|
Kiourtzidis M, Kühn J, Schutkowski A, Baur AC, Hirche F, Stangl GI. Inhibition of Niemann-Pick C1-like protein 1 by ezetimibe reduces uptake of deuterium-labeled vitamin D in mice. J Steroid Biochem Mol Biol 2020; 197:105504. [PMID: 31682937 DOI: 10.1016/j.jsbmb.2019.105504] [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] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 09/22/2019] [Accepted: 10/22/2019] [Indexed: 12/17/2022]
Abstract
For a long time, orally ingested vitamin D was assumed to enter the body exclusively via simple passive diffusion. Recent data from in vitro experiments have described Niemann-Pick C1-like protein 1 (Npc1l1) as an important sterol transporter for vitamin D absorption. However, short-term applications of ezetimibe, which inhibits Npc1l1, were not associated with reduced vitamin D uptake in animals and humans. The current study aimed to elucidate the effect of long-term inhibition of Npc1l1 by ezetimibe on the uptake and storage of orally administered triple deuterated vitamin D3 (vitamin D3-d3). Therefore, 30 male wild-type mice were randomly assigned into three groups and received diets with 25 μg/kg of vitamin D3-d3 that contained 0 (control group), 50 or 100 mg/kg ezetimibe for six weeks. Mice fed diets with 50 or 100 mg/kg ezetimibe had lower circulating levels of cholesterol than control mice (-12 %, -15 %, P < 0.01). In contrast, the concentrations of 7-dehydrocholesterol in serum (P < 0.001) and liver (P < 0.05) were higher in mice treated with ezetimibe than in control mice, indicating an increased sterol synthesis to compensate for cholesterol reduction. Long-term application of ezetimibe significantly reduced the concentrations of vitamin D3-d3 in the serum and tissues of mice. The magnitude of vitamin D3 reduction was comparable between the two ezetimibe groups. In comparison to the control group, mice treated with ezetimibe had lower concentrations of deuterated vitamin D3 compared with the control group in serum (62 %, P < 0.001), liver (79 %, P < 0.001), kidney (54 %, P < 0.001), adipose tissues (55 %, P < 0.001) and muscle (41 %, P < 0.001). Surprisingly, the serum concentration of deuterated 25-hydroxyvitamin D3 was higher in the group fed 100 mg/kg ezetimibe than in the control group (P < 0.05). The protein expression of the vitamin D hydroxylases Cyp2r1, Cyp27a1, Cyp3a11, Cyp24a1 and Cyp2j3 in liver and Cyp27b1 and Cyp24a1 in kidney remained largely unaffected by ezetimibe. To conclude, Npc1l1 appears to be crucial for the uptake of orally ingested vitamin D because long-term inhibition of Npc1l1 by ezetimibe strongly reduced the levels of deuterium-labeled vitamin D in the body; the observed rise in deuterated 25-hydroxyvitamin D3 in serum of these mice can not be explained by the expression levels of the key enzymes involved in vitamin D hydroxylation.
Collapse
Affiliation(s)
- Mikis Kiourtzidis
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, Germany.
| | - Julia Kühn
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, Germany.
| | - Alexandra Schutkowski
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, Germany.
| | - Anja C Baur
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, Germany; Competence Cluster of Cardiovascular Health and Nutrition (nutriCARD), Halle-Jena-Leipzig, Germany.
| | - Frank Hirche
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, Germany.
| | - Gabriele I Stangl
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, Germany; Competence Cluster of Cardiovascular Health and Nutrition (nutriCARD), Halle-Jena-Leipzig, Germany.
| |
Collapse
|
13
|
Kühn J, Wassermann C, Ebschke S, Schutkowski A, Thamm K, Wensch-Dorendorf M, von Borell E, Stangl GI. Feasibility of artificial light regimes to increase the vitamin D content in indoor-laid eggs. Poult Sci 2019; 98:5177-5187. [PMID: 31041442 DOI: 10.3382/ps/pez234] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [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: 11/13/2018] [Accepted: 04/02/2019] [Indexed: 12/16/2022] Open
Abstract
Vitamin D insufficiency is prevalent worldwide. Recently, we showed that exposure of laying hens to sunlight or artificial ultraviolet B (UVB) light is an efficient strategy to increase the vitamin D content in eggs. In the current study, using 2 different chicken genotypes and stocking densities, we addressed the question of whether different UVB-emitting regimes work under real indoor housing conditions in a floor system or in furnished cages. Here, we found a 3.7-fold increase in the egg vitamin D content in Lohmann Selected Leghorn hens and a 4.2-fold increase in Lohmann Brown hens after UVB exposure for 6 h/d. The data further reveal that UVB exposure under high stocking density is equally effective compared to that at low stocking density. The different light regimes were not associated with changes in the behavior of these animals. To conclude, artificial UVB-emitting light regimes are a practical strategy to increase the vitamin D content in indoor-laid eggs.
Collapse
Affiliation(s)
- Julia Kühn
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, 06120 Halle (Saale), Germany
| | - Corinna Wassermann
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, 06120 Halle (Saale), Germany
| | - Stephan Ebschke
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, 06120 Halle (Saale), Germany
| | - Alexandra Schutkowski
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, 06120 Halle (Saale), Germany
| | - Katrin Thamm
- Competence Cluster for Nutrition and Cardiovascular Health (nutriCARD), Halle-Jena-Leipzig, Germany
| | - Monika Wensch-Dorendorf
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, 06120 Halle (Saale), Germany
| | - Eberhard von Borell
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, 06120 Halle (Saale), Germany
| | - Gabriele I Stangl
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, 06120 Halle (Saale), Germany.,Competence Cluster for Nutrition and Cardiovascular Health (nutriCARD), Halle-Jena-Leipzig, Germany
| |
Collapse
|
14
|
Baur AC, Kühn J, Brandsch C, Hirche F, Stangl GI. Intake of ergosterol increases the vitamin D concentrations in serum and liver of mice. J Steroid Biochem Mol Biol 2019; 194:105435. [PMID: 31352023 DOI: 10.1016/j.jsbmb.2019.105435] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [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: 04/24/2019] [Revised: 07/18/2019] [Accepted: 07/24/2019] [Indexed: 12/26/2022]
Abstract
Factors that can modify the bioavailability of orally administered vitamin D are not yet widely known. Ergosterol is a common fungal sterol found in food which has a chemical structure comparable to that of vitamin D. This study aimed to investigate the effect of ergosterol on vitamin D metabolism. Therefore, 36 male wild type-mice were randomly subdivided into three groups (n = 12) and received a diet containing 25 μg vitamin D3 and either 0 mg (control), 2 mg or 7 mg ergosterol per kg diet for 6 weeks. To elucidate the impact of ergosterol on hepatic hydroxylation of vitamin D, human hepatoma cells (HepG2) were treated with different concentrations of ergosterol. Concentrations of vitamin D3 and 25-hydroxyvitamin D3 (25(OH)D3) in cells, livers and kidneys of mice and additionally 24,25-dihydroxyvitamin D3 (24,25(OH)2D3) in serum were quantified by LC-MS/MS. The concentration of 1,25-dihydroxyvitamin D3 (1,25(OH)2D3) in serum was analyzed by commercially-available enzyme immuno assay. The concentrations of cholesterol and triglycerides were analyzed in livers of mice by photometric assays. Analyses revealed that mice receiving 7 mg/kg ergosterol with their diet had 1.3-, 1.7- and 1.5-times higher concentrations of vitamin D3 in serum, liver and kidney, respectively, than control mice (P < 0.05), whereas no significant effects were observed in mice fed 2 mg/kg ergosterol. The hydroxylation of vitamin D remained unaffected by dietary ergosterol, since the concentration of 25-hydroxyvitamin D3 in serum and tissues and the concentrations of 1,25(OH)2D3 and 24,25(OH)2D3 in serum were not different between the three groups of mice. The lipid concentrations in liver were also not affected by dietary ergosterol. Data from the cell culture studies showed that ergosterol did not influence the conversion of vitamin D3 to 25(OH)D3. To conclude, ergosterol appears to be a modulator of vitamin D3 concentrations in the body of mice, without modulating the hydroxylation of vitamin D3 in liver.
Collapse
Affiliation(s)
- Anja C Baur
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, Von-Danckelmann-Platz 2, 06120, Halle (Saale), Germany; Competence Cluster for Nutrition and Cardiovascular Health (nutriCARD) Halle-Jena-Leipzig, Germany.
| | - Julia Kühn
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, Von-Danckelmann-Platz 2, 06120, Halle (Saale), Germany; Competence Cluster for Nutrition and Cardiovascular Health (nutriCARD) Halle-Jena-Leipzig, Germany.
| | - Corinna Brandsch
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, Von-Danckelmann-Platz 2, 06120, Halle (Saale), Germany.
| | - Frank Hirche
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, Von-Danckelmann-Platz 2, 06120, Halle (Saale), Germany.
| | - Gabriele I Stangl
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, Von-Danckelmann-Platz 2, 06120, Halle (Saale), Germany; Competence Cluster for Nutrition and Cardiovascular Health (nutriCARD) Halle-Jena-Leipzig, Germany.
| |
Collapse
|
15
|
Kühn J, Trotz P, Stangl GI. Prevalence of vitamin D insufficiency and evidence for disease prevention in the older population. Z Gerontol Geriatr 2018; 51:567-572. [PMID: 29666919 DOI: 10.1007/s00391-018-1390-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Revised: 03/05/2018] [Accepted: 03/27/2018] [Indexed: 12/20/2022]
Abstract
The prevalence of vitamin D insufficiency, usually assessed by the analysis of circulating 25-hydroxyvitamin D (25[OH])D), is very high in the aging German population. An important factor that reduces endogenous vitamin D synthesis in older persons is physical inactivity or care-dependency that limits the time spent outside. Additionally, it has been suggested that the age-dependent decline in the glomerular filtration rate is associated with a reduced production of bioactive calcitriol. As this phenomenon is not detectable by the assessment of 25(OH)D, it is necessary to analyze the level of parathyroid hormone as a marker of calcitriol function. Because 25(OH)D levels are highly correlated with an active and healthy life style, data from epidemiological studies are not necessarily suitable to elucidate the role of vitamin D in disease prevention. Recently published meta-analyses of randomized controlled trials (RCTs) showed moderate effects of vitamin D supplementation on fracture risk and found that vitamin D was more effective when administered in combination with calcium. The role of vitamin D in the prevention of falls and frailty remains unclear. Much evidence has demonstrated the beneficial effects of vitamin D on respiratory tract infections and asthma, which are very relevant health issues in the older population. To conclude, vitamin D, particularly combined with calcium, has moderately beneficial effects on the skeletal system and is useful for the prevention of respiratory tract infections.
Collapse
Affiliation(s)
- Julia Kühn
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, Von-Danckelmann-Platz 2, 06120, Halle (Saale), Germany.,Competence Cluster of Cardiovascular Health and Nutrition (nutriCARD), Halle-Jena-Leipzig, Germany
| | - Paula Trotz
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, Von-Danckelmann-Platz 2, 06120, Halle (Saale), Germany
| | - Gabriele I Stangl
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, Von-Danckelmann-Platz 2, 06120, Halle (Saale), Germany. .,Competence Cluster of Cardiovascular Health and Nutrition (nutriCARD), Halle-Jena-Leipzig, Germany.
| |
Collapse
|
16
|
Langner S, Kromrey M, Kühn J, Grothe M, Domin M. Repeated intravenous administration of gadobutrol does not lead to increased signal intensity on unenhanced T1-weighted images – a voxel-based whole brain analysis. ROFO-FORTSCHR RONTG 2017. [DOI: 10.1055/s-0037-1600323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- S Langner
- Universitätsmedizin Greifswald, Institut für Diagnostische Radiologie und Neuroradiologie, Greifswald
| | - M Kromrey
- Universitätsmedizin Greifswald, Institut für Diagnostische Radiologie und Neuroradiologie, Greifswald
| | - J Kühn
- Universitätsmedizin Greifswald, Institut für Diagnostische Radiologie und Neuroradiologie, Greifswald
| | - M Grothe
- Universitätsmedizin Greifswald, Klinik für Neurologie, Greifswald
| | - M Domin
- Universitätsmedizin Greifswald, Institut für Diagnostische Radiologie und Neuroradiologie, Funktionelle Bildgebung, Greifswald
| |
Collapse
|
17
|
Kromrey M, Schorn F, Liedtke K, Ittermann T, Kühn J. Akute transiente Dyspnoe: Einfluss der Scanzeit in der arteriellen Phase der Primovist®-verstärkten Leber-MRT. ROFO-FORTSCHR RONTG 2017. [DOI: 10.1055/s-0037-1600322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- M Kromrey
- Universitätsmedizin Greifswald, Institut für Diagnostische Radiologie und Neuroradiologie, Greifswald
| | - F Schorn
- Universitätsmedizin Greifswald, Institut für Diagnostische Radiologie und Neuroradiologie, Greifswald
| | - K Liedtke
- Universitätsmedizin Greifswald, Institut für Diagnostische Radiologie und Neuroradiologie, Greifswald
| | - T Ittermann
- Universitätsmedizin Greifswald, Institut für Community Medicine, Greifswald
| | - J Kühn
- Universitätsmedizin Greifswald, Institut für Diagnostische Radiologie und Neuroradiologie, Greifswald
| |
Collapse
|
18
|
Kühn J, Schäfer S, Quadrat A, Grabe H, Mensel B, Schulze L, Ittermann T, Hosten N, Kromrey M. Persönlichkeitsprofil und Erfahrung von Interventionsradiologen auf das Ergebnis CT-gestützter perkutaner Lungenbiopsien. ROFO-FORTSCHR RONTG 2017. [DOI: 10.1055/s-0037-1600284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- J Kühn
- Universitätsmedizin, Institu für Diagnostische Radiologie und Neuroradiologie, Greifswald
| | - S Schäfer
- Universitätsmedizin Greifswald, Institut für Diagnostische Radiologie und Neuroradiologie, Greifswald
| | - A Quadrat
- Universitätsmedizin Greifswald, Institut für Diagnostische Radiologie und Neuroradiologie, Greifswald
| | - H Grabe
- Universitätsmedizin Greifswald, Institut für Psychiatrie und Psychotherapie, Greifswald
| | - B Mensel
- Universitätsmedizin Greifswald, Institut für Diagnostische Radiologie und Neuroradiologie, Greifswald
| | - L Schulze
- Universitätsmedizin Greifswald, Institut für Psychiatrie und Psychotherapie, Greifswald
| | - T Ittermann
- Universitätsmedizin Greifswald, Institut für Community Medicine, Greifswald
| | - N Hosten
- Universitätsmedizin Greifswald, Institut für Diagnostische Radiologie und Neuroradiologie, Greifswald
| | - M Kromrey
- Universitätsmedizin Greifswald, Institut für Diagnostische Radiologie und Neuroradiologie, Greifswald
| |
Collapse
|
19
|
Brendle C, Hackmack KF, Kühn J, Wardeh M, Janisch T, Kopp R, Rossaint R, Stollenwerk A, Kowalewski S, Misgeld B, Leonhardt S, Walter M. Continuous gas transfer monitoring during extracorporeal membrane oxygenation. Biomed Signal Process Control 2017. [DOI: 10.1016/j.bspc.2016.08.023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
|
20
|
Kühn J, Hirche F, Geissler S, Stangl GI. Oral intake of 7-dehydrocholesterol increases vitamin D 3 concentrations in the liver and kidney. J Steroid Biochem Mol Biol 2016; 164:199-204. [PMID: 26709139 DOI: 10.1016/j.jsbmb.2015.12.017] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [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: 07/07/2015] [Revised: 12/10/2015] [Accepted: 12/14/2015] [Indexed: 01/09/2023]
Abstract
INTRODUCTION Due to the high prevalence of vitamin D deficiency, strategies are needed to improve vitamin D status. Food components can affect vitamin D metabolism and have to be considered when estimating the efficacy of vitamin D supplements. 7-dehydrocholesterol (7-DHC) occurs naturally in food, but its impact on vitamin D metabolism has not yet been examined. METHODS Three groups of male C57BL/6 mice (n=12 per group) were placed on a diet that contained 0, 2.5 or 5mg 7-DHC per kg diet over a period of 6 weeks. Vitamin D and other sterols in the serum, skin, liver and kidney were quantified by LC-MS/MS. The relative mRNA abundance of hepatic genes encoding vitamin D hydroxylation enzymes and transporters was analyzed by real-time RT-PCR. RESULTS We found a substantial dose-dependent increase of non-hydroxylated vitamin D3 in the liver and kidney of mice fed a diet containing 7-DHC. The vitamin D3 content in the liver was 2.80±0.61pmol/g, 7.34±4.28pmol/g and 12.9±3.58pmol/g in groups that received 0, 2.5 and 5mg/kg 7-DHC, respectively. In the kidney, the vitamin D3 content of these groups was 1.78±1.17pmol/g, 3.55±1.06 and 6.36±2.29pmol/g, respectively. The serum and tissue concentrations of 25-hydroxyvitamin D3 (25(OH)D3) remained unaffected by 7-DHC. The relative mRNA data provided no plausible mechanism for the observed effects of 7-DHC on vitamin D3. All groups of mice had similar concentrations of cholesterol, desmosterol and 7-DHC in their serum and tissues. CONCLUSION The current findings provide the first evidence that dietary 7-DHC seems to affect vitamin D metabolism. The underlying mechanism remains elusive and needs further investigation.
Collapse
Affiliation(s)
- Julia Kühn
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, Von-Danckelmann-Platz 2, 06120 Halle (Saale), Germany.
| | - Frank Hirche
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, Von-Danckelmann-Platz 2, 06120 Halle (Saale), Germany.
| | - Stefanie Geissler
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, Von-Danckelmann-Platz 2, 06120 Halle (Saale), Germany.
| | - Gabriele I Stangl
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, Von-Danckelmann-Platz 2, 06120 Halle (Saale), Germany.
| |
Collapse
|
21
|
Mensel B, Kühn J, Wenzel M, Heßelbarth L, Lorbeer R. MRT-basierte Durchmesserbestimmung der Aorta in einer Allgemeinbevölkerung: Referenzwerte und Einfluss von kardiovaskulären Risikofaktoren. ROFO-FORTSCHR RONTG 2016. [DOI: 10.1055/s-0036-1581401] [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: 10/22/2022]
|
22
|
Kühn J, Thamm P, Kindermann K, Hadlich S, Hosten N. Die Proton-Density Fettfraktion ein Biomarker für Leberfett. ROFO-FORTSCHR RONTG 2015. [DOI: 10.1055/s-0035-1550886] [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: 10/23/2022]
|
23
|
Mahlke C, Mensel B, Grisk O, Schreiber A, Glitsch A, Hosten N, Kühn J. In vitro Untersuchungen der Wirksamkeit verschiedener Vasodilatatoren zur intraarteriellen Infusionstherapie bei Patienten mit non-okklusiver mesenterialer Ischämie. ROFO-FORTSCHR RONTG 2015. [DOI: 10.1055/s-0035-1551071] [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: 10/23/2022]
|
24
|
Fülkell P, Langner S, Mahlke C, Plessow B, Hosten N, Kühn J. Geräuschreduzierende Softwarealgorithmen im MRT und deren Einfluss auf die Bildqualität. ROFO-FORTSCHR RONTG 2015. [DOI: 10.1055/s-0035-1550808] [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: 10/23/2022]
|
25
|
Kühn J, Schutkowski A, Hirche F, Baur AC, Mielenz N, Stangl GI. Non-linear increase of vitamin D content in eggs from chicks treated with increasing exposure times of ultraviolet light. J Steroid Biochem Mol Biol 2015; 148:7-13. [PMID: 25445915 DOI: 10.1016/j.jsbmb.2014.10.015] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [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: 08/14/2014] [Revised: 09/25/2014] [Accepted: 10/22/2014] [Indexed: 11/20/2022]
Abstract
Vitamin D fortified food can help to reduce the prevalence for vitamin D deficiency. Previous data provided evidence that eggs from hens exposed to ultraviolet (UV) light contain large quantities of vitamin D. In the current study, we assessed the efficacy of vitamin D enrichment in eggs upon increasing daily UVB exposure times. We further addressed the question whether extended UVB irradiation affects the skin content of 7-dehydrocholesterol. To this end, 35 hens were assigned to 7 groups of 5 animals each and were exposed to UVB light (76μW/cm(2)) for 0, 15, 30, 60, 120, 180 and 300min per day, respectively. Eggs from the treatment groups were collected at baseline and after 2, 3 and 4 weeks of treatment, respectively. Skin samples were gained at the end of 4 weeks. Vitamin D metabolites were quantified by liquid chromatography-tandem mass spectrometry. The contents of vitamin D3 and 25(OH)D3 in egg yolk raised non-linear in response to increasing daily UVB exposure times. The vitamin D3 content did not reach a clear-cut plateau within the chosen UVB treatment times. A daily UVB exposure time of 300min resulted in vitamin D3 contents of 28.6μg/100g egg yolk dry matter. In contrast to vitamin D3, the 25(OH)D3 content in the egg yolk achieved a maximum upon an UVB irradiation time of 60min/d. The cutaneous 7-dehydrocholesterol contents were not altered in response to the chosen UVB irradiation times. In conclusion, the data show a distinct non-linear dose-response relationship of UVB exposure times on the total vitamin D content in eggs. This article is part of a special issue entitled '17th Vitamin D Workshop'.
Collapse
Affiliation(s)
- Julia Kühn
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, Von-Danckelmann-Platz 2, Halle (Saale) 06120, Germany.
| | - Alexandra Schutkowski
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, Von-Danckelmann-Platz 2, Halle (Saale) 06120, Germany.
| | - Frank Hirche
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, Von-Danckelmann-Platz 2, Halle (Saale) 06120, Germany.
| | - Anja C Baur
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, Von-Danckelmann-Platz 2, Halle (Saale) 06120, Germany.
| | - Norbert Mielenz
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, Von-Danckelmann-Platz 2, Halle (Saale) 06120, Germany.
| | - Gabriele I Stangl
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, Von-Danckelmann-Platz 2, Halle (Saale) 06120, Germany.
| |
Collapse
|
26
|
Kühn J, Mennesson B, Liewer K, Martin S, Loya F, Millan-gabet R, Serabyn E. EXPLORING INTERMEDIATE (5-40 AU) SCALES AROUND AB AURIGAE WITH THE PALOMAR FIBER NULLER. ACTA ACUST UNITED AC 2015. [DOI: 10.1088/0004-637x/800/1/55] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
27
|
Kühn J, Schutkowski A, Kluge H, Hirche F, Stangl GI. Free-range farming: a natural alternative to produce vitamin D-enriched eggs. Nutrition 2013; 30:481-4. [PMID: 24607306 DOI: 10.1016/j.nut.2013.10.002] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2013] [Revised: 09/25/2013] [Accepted: 10/08/2013] [Indexed: 11/18/2022]
Abstract
OBJECTIVE Food-based strategies need to be developed to improve the vitamin D status of individuals. Recent studies identified ultraviolet B irradiation as an efficient method to enrich mushrooms and eggs with vitamin D. The aim of this study was to determine whether free-range farming of hens could provide a valuable method to produce vitamin D-enriched eggs. METHODS Laying hens were randomly assigned to three groups of 33 to 34 animals each, and were kept either indoors (indoor group), outdoors (outdoor group), or with an indoor/outdoor option (indoor/outdoor group) over 4 wk. RESULTS The study shows that the vitamin D3 content of egg yolk was three- to fourfold higher in the groups that were exposed to sunlight (outdoor and indoor/outdoor groups) compared with the indoor group (P < 0.001). Egg yolk from the outdoor group revealed the highest vitamin D3 content, which averaged 14.3 μg/100 g dry matter (DM), followed by that from the indoor/outdoor group (11.3 μg/100 g DM). Yolk from indoor eggs contained only 3.8 μg vitamin D/100 g DM. The 25-hydroxyvitamin D (25[OH]D3) content of egg yolk was also influenced by sunlight exposure, although less pronounced than the vitamin D content (P < 0.05). In contrast, free-range eggs randomly acquired from supermarkets had relatively low vitamin D contents. CONCLUSION Free-range farming offers an efficient alternative to fortify eggs with vitamin D, provided that farming conditions are sufficiently attractive for hens to range outside.
Collapse
Affiliation(s)
- Julia Kühn
- Institute of Agricultural and Nutritional Sciences, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany
| | - Alexandra Schutkowski
- Institute of Agricultural and Nutritional Sciences, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany
| | - Holger Kluge
- Institute of Agricultural and Nutritional Sciences, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany
| | - Frank Hirche
- Institute of Agricultural and Nutritional Sciences, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany
| | - Gabriele I Stangl
- Institute of Agricultural and Nutritional Sciences, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany.
| |
Collapse
|
28
|
Bock K, Otto S, Kühn J, Puls R, Rosenberg C, Hosten N, Langner S. Diagnostische Sicherheit und Komplikationsprofil bei CT- gestützten Lungenbiopsien. ROFO-FORTSCHR RONTG 2010. [DOI: 10.1055/s-0030-1252740] [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: 10/19/2022]
|
29
|
Völzke H, Alte D, Schmidt CO, Radke D, Lorbeer R, Friedrich N, Aumann N, Lau K, Piontek M, Born G, Havemann C, Ittermann T, Schipf S, Haring R, Baumeister SE, Wallaschofski H, Nauck M, Frick S, Arnold A, Jünger M, Mayerle J, Kraft M, Lerch MM, Dörr M, Reffelmann T, Empen K, Felix SB, Obst A, Koch B, Gläser S, Ewert R, Fietze I, Penzel T, Dören M, Rathmann W, Haerting J, Hannemann M, Röpcke J, Schminke U, Jürgens C, Tost F, Rettig R, Kors JA, Ungerer S, Hegenscheid K, Kühn JP, Kühn J, Hosten N, Puls R, Henke J, Gloger O, Teumer A, Homuth G, Völker U, Schwahn C, Holtfreter B, Polzer I, Kohlmann T, Grabe HJ, Rosskopf D, Kroemer HK, Kocher T, Biffar R, John U, Hoffmann W. Cohort profile: the study of health in Pomerania. Int J Epidemiol 2010; 40:294-307. [PMID: 20167617 DOI: 10.1093/ije/dyp394] [Citation(s) in RCA: 735] [Impact Index Per Article: 52.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Henry Völzke
- Institute for Community Medicine, Ernst Moritz Arndt University Greifswald, Germany.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
30
|
Partecke LI, Cziupka K, Kühn J, Rosenberg C, Puls R, v Bernstorff W, Glitsch A, Heidecke CD, Stier A. [Atypical vascular supply from the coeliac trunk. Recurrent bleeding from a duodenal ulcer]. Chirurg 2008; 80:238-40. [PMID: 18820879 DOI: 10.1007/s00104-008-1625-4] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Hemorrhagic duodenal ulcers should primarily be controlled by endoscopy. In cases of recurrent bleeding or if bleeding cannot be controlled endoscopically, open surgery is the gold standard. Rarely, atypical origin of arteries or additional atypical arteries may lead to further unexpected hemorrhagic recurrences and angiography with surgical intervention is the treatment of choice. In this article a rare case of an atypical visceral artery connecting the coeliac trunk and the gastroduodenal artery leading to recurrent bleeding from a duodenal ulcer is presented.
Collapse
Affiliation(s)
- L I Partecke
- Klinik für Allgemeine Chirurgie, Viszeral-, Thorax- und Gefässchirurgie, Ernst-Moritz-Arndt-Universität, Friedrich-Loeffler-Strasse 23b, Greifswald, Germany.
| | | | | | | | | | | | | | | | | |
Collapse
|
31
|
Kühn J, Puls R, Wallaschowski H, Heidecke C, Rosenberg C, Hosten N. Charakteristik von Koagulationsnekrosen nach laserinduzierter Thermotherapie in der kontrastmittelverstärkten Magnetresonanztomografie und deren Einfluss auf den Therapieerfolg. ROFO-FORTSCHR RONTG 2008; 180:816-20. [DOI: 10.1055/s-2008-1027478] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
32
|
Vogel T, Vadonis R, Kühn J, Eing BR, Shenninger N, Haier J. Viral reactivation is not related to septic complications after major surgical resections. APMIS 2008; 116:292-301. [PMID: 18397464 DOI: 10.1111/j.1600-0463.2008.00447.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Anastomotic leakage and septic complications are the most important determinants of postoperative outcome after major surgical resections. Malignant diseases and surgical trauma can influence immune responses and the ability to react against infectious factors, such as bacteria and viruses. Comparable immune suppression can cause viral reactivation in transplantation and trauma patients. In this prospective study, patients who underwent major surgical resections for oesophageal or pancreatic cancer were investigated for the potential involvement of viral reactivation in the development of septic complications. 86 patients (40 oesophageal resections, 27 pancreatic resections, 19 surgical explorations) were included. Viral antigens, viral DNA, antibodies against viral structures (IgG, IgM, IgA) and, in part, viral cultivation were performed for CMV, EBV, HSV1, HSV2, HZV6 and VZV in serum, urine, sputum and swabs from buccal mucosa preoperatively and at postoperative days 1, 3 and 5. Test results were compared with the postoperative outcome (30-day morbidity, in-hospital mortality) and clinical scores (SOFA, TISS). For statistical analyses Student's t-tests and Chi2-tests were used. The overall complication rate was 19.8% (30-day morbidity) with an in-hospital mortality of 1.2% (1/86 patients). Postoperatively, anti-CMV-IgG titres were significantly reduced (p<0.05) and remained suppressed in patients with septic complications. Anti-CMV-gB-IgG were also reduced, but showed considerable interindividual differences. Anti-CMV-IgA and -IgM did not show significant alterations in the postoperative course. In addition, direct viral detection methods did not support viral reactivation in patients in any of the investigated groups. The reduction of anti-CMV antibodies is likely caused by an immune suppression, specifically by reduced B-cell counts after major surgical interventions. Viral reactivation, however, did not occur in the early postoperative period as a specific risk for septic complications.
Collapse
Affiliation(s)
- T Vogel
- Molecular Biology Laboratory, Department of General Surgery, University Hospital Münster, Germany
| | | | | | | | | | | |
Collapse
|
33
|
Marian A, Charrière F, Colomb T, Montfort F, Kühn J, Marquet P, Depeursinge C. On the complex three-dimensional amplitude point spread function of lenses and microscope objectives: theoretical aspects, simulations and measurements by digital holography. J Microsc 2007; 225:156-69. [PMID: 17359250 DOI: 10.1111/j.1365-2818.2007.01727.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The point spread function is widely used to characterize the three-dimensional imaging capabilities of an optical system. Usually, attention is paid only to the intensity point spread function, whereas the phase point spread function is most often neglected because the phase information is not retrieved in noninterferometric imaging systems. However, phase point spread functions are needed to evaluate phase-sensitive imaging systems and we believe that phase data can play an essential role in the full aberrations' characterization. In this paper, standard diffraction models have been used for the computation of the complex amplitude point spread function. In particular, the Debye vectorial model has been used to compute the amplitude point spread function of x63/0.85 and x100/1.3 microscope objectives, exemplifying the phase point spread function specific for each polarization component of the electromagnetic field. The effect of aberrations on the phase point spread function is then analyzed for a microscope objective used under nondesigned conditions, by developing the Gibson model (Gibson & Lanni, 1991), modified to compute the three-dimensional amplitude point spread function in amplitude and phase. The results have revealed a novel anomalous phase behaviour in the presence of spherical aberration, providing access to the quantification of the aberrations. This work mainly proposes a method to measure the complex three-dimensional amplitude point spread function of an optical imaging system. The approach consists in measuring and interpreting the amplitude point spread function by evaluating in amplitude and phase the image of a single emitting point, a 60-nm-diameter tip of a Near Field Scanning Optical Microscopy fibre, with an original digital holographic experimental setup. A single hologram gives access to the transverse amplitude point spread function. The three-dimensional amplitude point spread function is obtained by performing an axial scan of the Near Field Scanning Optical Microscopy fibre. The phase measurements accuracy is equivalent to lambda/60 when the measurement is performed in air. The method capability is demonstrated on an Achroplan x20 microscope objective with 0.4 numerical aperture. A more complete study on a x100 microscope objective with 1.3 numerical aperture is also presented, in which measurements performed with our setup are compared with the prediction of an analytical aberrations model.
Collapse
Affiliation(s)
- A Marian
- Ecole Polytechnique Fédérale de Lausanne (EPFL), Imaging and Applied Optics Institute, Station 17, CH-1015 Lausanne, Switzerland
| | | | | | | | | | | | | |
Collapse
|
34
|
Kühn J, Pais I, Hubold C, Hallschmid M, Born J, Fehm HL, Peters A. AMPA receptor antagonist caroverine has no effect on hypoglycaemic counterregulation. Exp Clin Endocrinol Diabetes 2007. [DOI: 10.1055/s-2007-972396] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
35
|
Rosenberg C, Kühn J, Puls R, Hegenscheid K, Fröhlich CP, Hosten N. Gd-EOB-DTPA-verstärkte Bildgebung von Lebermetastasen – Vorteile für die MRT-geführte perkutane Tumorablation. ROFO-FORTSCHR RONTG 2007. [DOI: 10.1055/s-2007-976839] [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: 10/21/2022]
|
36
|
Kollertz P, Kühn J, Luttkus A. Intrauterine Therapie und peripartales Management bei fetaler SVT und nachfolgender supraventrikulärer Extrasystolie. Geburtshilfe Frauenheilkd 2006. [DOI: 10.1055/s-2006-952728] [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: 10/20/2022] Open
|
37
|
Hosten N, Kühn J. Diffuse Leberparenchym-Veränderungen. ROFO-FORTSCHR RONTG 2005. [DOI: 10.1055/s-2005-867301] [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: 10/19/2022]
|
38
|
Krause R, Kühn J, Penndorf I, Knoll K, Henle T. N-Terminal pyrazinones: a new class of peptide-bound advanced glycation end-products. Amino Acids 2004; 27:9-18. [PMID: 15309567 DOI: 10.1007/s00726-004-0102-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2004] [Accepted: 05/07/2004] [Indexed: 10/26/2022]
Abstract
The reaction of peptide Gly-Ala-Phe with the alpha-dicarbonyl compounds glyoxal and methylglyoxal was studied under physiological conditions (pH=7.4, 37 degrees C). Using HPLC with UV and fluorescence detection, a rapid derivatization of the peptide and the concomitant formation of well-defined products were observed. The products, which showed characteristic UV absorbance (lambda(max)=320 to 340 nm) and fluorescence (lambda(ex)=330 to 340 nm, lambda(em)=395 to 405 nm), were identified by ESI-MS and NMR spectroscopic analysis as the N-terminally pyrazinone-modified peptides I (N-[2-(2-oxo-2H-pyrazin-1-yl)-propyl]-phenylalanine) and II (N-[2-(5-methyl-2-oxo-2H-pyrazin-1-yl)-propionyl]-phenylalanine). Model experiments revealed that the reactivity of the N-termini of peptides towards a derivatization by glyoxal is in the same order of magnitude as that of arginine, which generally is attributed as main target for alpha-dicarbonyl compounds in proteins. Incubation of insulin with glyoxal proved the protein-bound formation of pyrazinones, with the N-terminus of the B-chain as the main target. According to these results, we conclude that N-terminal pyrazinones represent a new type of advanced glycation end-products (AGEs) with significance for biological systems and foods.
Collapse
Affiliation(s)
- R Krause
- Institute of Food Chemistry, Technical University of Dresden, Dresden, Germany
| | | | | | | | | |
Collapse
|
39
|
Abstract
Orf of the hand is considered as an uncommon viral infection which is usually acquired through contact with infected sheep and goats. Indirect infections through contaminated knives or meat have been reported. Many authors feel that the disorder is more common than reported because the disease is often misdiagnosed and the course is usually self-limiting with spontaneous healing within several weeks. Diagnosis is mainly made by patient's history and clinical course. It is important to know the benign nature of human orf, since complications seem to be caused by overtreatment.
Collapse
Affiliation(s)
- H Rieger
- Klinik für Unfall-, Hand- und Wiederherstellungschirurgie, Clemenshospital, Akademisches Lehrkrankenhaus der Westfälischen Wilhelms-Universität, Münster.
| | | | | | | |
Collapse
|
40
|
Kühn J. Virusinfektionen beim Immunsupprimieren. Zeitschrift f�r Herz-, Thorax- und Gef��chirurgie 2002. [DOI: 10.1007/s00398-002-1110-1] [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: 10/26/2022]
|
41
|
von Bary S, Kühn J, Krieger S, Sobala KH. [Vena cava filter--prevention of pulmonary embolism. Report of clinical experiences]. Zentralbl Chir 1999; 124:27-31. [PMID: 10091294] [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: 02/11/2023]
Abstract
Between 1982 and 1997 inferior vena cava filters were implanted in 182 patients. Indications were recurrent pulmonary embolism, massive embolism and prophylactic use prior to planned high-risk-operations upon patients with thromboembolic complications in shorter history. Kimray-Greenfield, Cardial and Vascor-systems were implanted. Mortality was 0, neither relevant bleedings, nor infections occurred. Vena-cava-filters prevented from re-embolism in 98%. During hospitalisation 3 cases of re-embolism (1.6%) were noticed due to incorrect filter-placement. One patient died (< 1%). Follow-up-examinations were performed in 74 cases 6 to 24 months after implantation. We discovered 8 cases (11%) of filter-migration, 3 cases (4%) of filter-kinking, one case of filter-perforation and one case of filter-shrut-fracture. All these patients remained without clinical sequelae. Cava-thrombosis was found in 2 patients 6 to 24 months after filter-insertion (2.7%). There was no sign of re-embolism in our longterm follow-up. In our opinion the vena cava filter is an effective and safe method to prevent pulmonary re-embolism. Handling is quite easy and filter complications are low. In some elected cases prophylactic use of vena cava filters in high-risk-patients may be indicated.
Collapse
Affiliation(s)
- S von Bary
- Klinik für Viszeral-, Gefäss- und Allgemeinchirurgie, Kreiskrankenhaus Marienhöhe, Würselen
| | | | | | | |
Collapse
|
42
|
|
43
|
Abstract
Assay of human vitreous specimens obtained postmortem for HIV antibodies, or HIV p24 antigen, is reported to be a reliable technique to demonstrate HIV infection in possible cornea donors from whom serum could not be obtained. We tested three vitreous samples obtained during vitrectomy from two HIV-positive patients. One patient exhibited the clinical AIDS syndrome. HIV antigen and antibody tests were negative in all specimens. HIV proviral DNA was detected by PCR only in the vitreous of the patient with AIDS. Therefore, testing only vitreous samples is insufficient to exclude HIV infection in potential cornea donors.
Collapse
Affiliation(s)
- H Mietz
- Department of Ophthalmology, University of Cologne, Köln, Germany
| | | | | | | | | |
Collapse
|
44
|
Hartmann A, Kühn J, Hopf R, Klepzig H, Standke R, Kober G, Maul FD, Hör G, Kaltenbach M. Effect of propranolol and disopyramide on left ventricular function at rest and during exercise in hypertrophic cardiomyopathy. Cardiology 1992; 80:81-8. [PMID: 1611637 DOI: 10.1159/000174983] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
In 19 patients with hypertrophic cardiomyopathy (15 males, 4 females, mean age 49.2 +/- 10.8 years) left ventricular function was studied with radionuclide ventriculography at rest and during exercise in a crossover design without intervention and after disopyramide and propranolol treatment. 15 of the 19 patients had a resting or latent intraventricular gradient of more than 30 mm Hg. Left ventricular function at rest and during exercise was evaluated before medication, 90 min after oral administration of 200 mg disopyramide or 160 mg propranolol and after 3 weeks of oral therapy with disopyramide 200 mg 2 times a day or propranolol 80 mg 4 times a day. After long-term treatment with disopyramide, resting ejection fraction decreased from 72 +/- 12 to 69 +/- 14% (p less than 0.01) and peak ejection rate (PER) decreased from 3.46 +/- 135 to 3.24 +/- 65 end-diastolic volume (EDV).s-1 (p less than 0.01). Peak filling rate (PFR) at rest decreased from 3.01 +/- 0.8 to 2.77 +/- 0.63 EDV.s-1 (p less than 0.05). Time to peak filling rate (TPFR) at rest and during exercise after acute and chronic therapy did not change compared to control values. Acute and long-term administration of propranolol lead to a significant reduction in heart rate at rest and during exercise.(ABSTRACT TRUNCATED AT 250 WORDS)
Collapse
Affiliation(s)
- A Hartmann
- Department of Cardiology, Johann Wolfgang Goethe-University, Medical School, Frankfurt, FRG
| | | | | | | | | | | | | | | | | |
Collapse
|
45
|
Gaab MR, Trost HA, Lorenz M, Seegers K, Heuser D, Fitch W, Baethmann A, Speckmann EJ, Lehmenkühler A, Pöppelmann T, Bingmann D, Rabow L, Bergenheim T, Bålfors E, Urban G, Keplinger F, Kohl F, Kuttner H, Jobst G, Pittner F, Schalkhammer T, Mann-Buxbaum E, Litscher G, Steiler E, Pfurtschcller G, Schwarz G, Hinrichs H, Feistner H, Künkel H, Wieser HG, Isler P, Witztum A, Siegel A, Merles N, Möllmann M, Penner M, Schoeppner H, Hohenberger K, Daub D, Freye E, Grabitz K, Sandmann W, Haass A, Ladurner G, Teasdale G, Weis M, Hilz MJ, Claus D, Neundörfer B, Druschky KF, Litscher G, Pfurtscheller G, Heinze HJ, Künkcl H, Symon L, Cooper G, Rampil IJ, Bosco M, Adducci E, Gualtieri E, Amato A, Lacava E, Mascia A, Bonomo V, Dinkel M, Kamp HD, Schweiger H, Jaksche H, Schwerdtfeger K, Loew F, Rath SA, Klein HJ, Kühn J, Fritz W, Thiel A, Russ W, Hcmpelmann G, Morawetz RF, Schlager A, Lugcr TJ, Vajsar J, Hopkins AJ, Ronen GM, Kuppe H, Porte T, Dannenberger R, Götz C, Adt M, Schmucker P, Landi A, Colombo F, Luca GP, Fornezza U, Benedctti A, Bruno R, Zamparctti N, Engelhardt W, Drösler S, Dierks T, Maurer K, Hecht U, Lehmkuhl P, Pichlmayr I, Cheng-hui L, Shi-ao J, Cheng-hui L, Shi-ao J, Theissen J, Zander J, Moberg D, Bell R, Miller SB, Pohl S, Hühnefeld D, Henries HJ, Jantzen JP, Eberle B, Dick W, Wallenfang T, Fuzes I, Geissler C, Schregel W, Cunitz G, Fomezza U, Volpin L, Zamperetti N, Demo P, Digito A, Barbacini S, Zamperetti N, Lacquaniti L. Abstracts of scientific papers second international symposium on central nervous system monitoring. J Clin Monit Comput 1990. [DOI: 10.1007/bf02828296] [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: 10/22/2022]
|
46
|
Krüger E, Nitzsche M, Kühn J, Sasse LP, Nitzsche G. [Comments on so-called "chronic" and "therapy refractory" depression]. Psychiatr Neurol Med Psychol (Leipz) 1988; 40:523-31. [PMID: 3237880] [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] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The problems of so-called "therapy resistant or chronic" depression has been investigated on own patients of the year 1986, but simply one chronic example could be noticed. Configurations-frequence-analytic research didn't essentially result in significant statements. It is referred to that the frequent occurrence of the so-called "therapy resistant" depressions described by some authors, could be in connection with limited diagnosis inventories and insufficient to the personality orientated therapy regime.
Collapse
Affiliation(s)
- E Krüger
- Bezirksnervenklinik Haldensleben
| | | | | | | | | |
Collapse
|
47
|
Hess J, Stemler M, Will H, Schröder CH, Kühn J, Braun R. Frequent detection of antibodies to hepatitis B virus x-protein in acute, chronic and resolved infections. Med Microbiol Immunol 1988; 177:195-205. [PMID: 3047538 DOI: 10.1007/bf00211219] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [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: 01/03/2023]
Abstract
Recombinant MS2- or beta gal fusion proteins containing parts of hepatitis B virus (HBV) HBx-, HBc-, and HBs-amino acid sequences were expressed in Escherichia coli and were used to screen 96 and 60 serum samples of HBV infected and uninfected patients, respectively, for the corresponding antibodies by immunoblotting. Antibodies against HBx were detected in 20 out of 65 sera of patients with previous resolved HBV-infection, in 3 out of 7 patients with persistent infection, and in 9 out of 24 sera of patients with acute HBV infection. The specificity of the immune reaction was confirmed by competition experiments with MS2- and beta gal-HBx fusion proteins, and by the lack of HBx antibodies in the sera of uninfected patients. Hbs and HBc antibodies were detected less frequently by immunoblotting with recombinant fusion proteins than by a commercial immunoassay. Our results indicate that HBx antibodies are induced early and frequently during HBV infection suggesting that the HBx protein is an early antigenic protein expressed in vivo.
Collapse
Affiliation(s)
- J Hess
- Institut für Medizinische Virologie der Universität Heidelberg, Federal Republic of Germany
| | | | | | | | | | | |
Collapse
|
48
|
Kühn J. [Therapy for chronic pain: MSD syndrome in tense area of occlusion, temporomandibular joint and psyche]. Zahnarztl Mitt 1988; 78:878, 880, 882 passim. [PMID: 3166286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
|
49
|
Abstract
Bgl-II fragments of the genome of Herpes simplex virus type 2 (HSV-2) HG-52 were cloned into the vector p-Neo and were used to screen the complete HSV-2 genome for regions cross-hybridizing with the genome of HEL cells. Most extensive cross-hybridizing activity was observed with a 530 bp SstII subfragment of the viral BamHI G DNA-fragment (contained in Bgl II F), which spans the joint and the viral a-sequence. From a lambda-L47 library, a cellular 15 kb HindIII DNA fragment was subcloned in pBR 322 which contained a 1920 bp SstII subfragment having strong cross-hybridizing activity with the 530 bp Sst II fragment of HSV-2 BamHI G. Within this 1920 bp Sst II fragment the cross-hybridizing activity was confined to a 230 bp Bgl I/Hpa II subfragment. This 230 bp fragment (including the flanking sequences) was analyzed in comparison to the viral a-sequence. Sequence data revealed a (G + C) content of 66% in the cellular and 81% in the viral DNA fragment, which is mainly determined by an extremely (G + C) rich 16-fold direct repeat (DR2) at the 5'-end. The homology between both DNA-fragments varies between 56% and 79% within the L-S inversion region. Both sequences, furthermore, show homology to the human c-myc protooncogene.
Collapse
Affiliation(s)
- E Kohler
- Institute for Virus Research, German Cancer Research Center, Heidelberg, Federal Republic of Germany
| | | | | | | |
Collapse
|
50
|
Ullmann H, Kühn J. [Varicella zoster virus infection of the central nervous system with symptoms resembling cardiac phobia and schizophrenia]. Nervenarzt 1988; 59:113-7. [PMID: 3362259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- H Ullmann
- Psychiatrische Klinik, Universität Heidelberg
| | | |
Collapse
|