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Wilmanns C, Zechner U, Walter PK, Schulze A. [Correction: Impact of the Reflux Origin on the Clinical Stage and Surgical Decision in Primary Varicose Veins]. Zentralbl Chir 2024. [PMID: 38588702 DOI: 10.1055/a-2294-4144] [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: 04/10/2024]
Affiliation(s)
- Christoph Wilmanns
- Klinik für Gefäß-, endovaskuläre und Thoraxchirurgie, Schön Klinik Rendsburg, Rendsburg, Deutschland
| | - Ulrich Zechner
- Molekularbiologie, Labor Dr. Wisplinghoff, Köln, Deutschland
- Institut für Humangenetik, Universitätsklinikum der Johannes-Gutenberg-Universität, Mainz, Deutschland
| | | | - Alicia Schulze
- Institut für medizinische Biometrie, Epidemiologie und Informatik (IMBEI), Universitätsklinikum der Johannes-Gutenberg-Universität, Mainz, Deutschland
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Jankowiak S, Rossnagel K, Bauer J, Schulz A, Liebers F, Latza U, Romero Starke K, Seidler A, Nübling M, Riechmann-Wolf M, Letzel S, Wild P, Arnold N, Beutel M, Pfeiffer N, Lackner K, Münzel T, Schulze A, Hegewald J. Night shift work and cardiovascular diseases among employees in Germany: five-year follow-up of the Gutenberg Health Study. Scand J Work Environ Health 2024; 50:142-151. [PMID: 38258536 PMCID: PMC11006091 DOI: 10.5271/sjweh.4139] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2023] [Indexed: 01/24/2024] Open
Abstract
OBJECTIVE This study aimed to determine if there is an increased risk of incident cardiovascular diseases (CVD) resulting from cumulative night shift work in the German population-based Gutenberg Health Study (GHS). METHODS We examined working participants of the GHS at baseline and after five years. Cumulative night shift work in the 10 years before baseline was assessed and categorized as low (1-220 nights ≙ up to 1 year), middle (221-660 nights ≙ 1-3 years), and high (>660 nights ≙ more than 3 years) night shift exposure. Hazard ratios (HR) were estimated for incident "quality-assured CVD events" using Cox proportional hazard models. RESULTS At baseline, 1092 of 8167 working participants performed night shift work. During the follow-up, 202 incident cardiovascular events occurred. The crude incidence rates for CVD per 1000 person-years were 6.88 [95% confidence interval (CI) 4.80-9.55] for night shift workers and 5.19 (95% CI 4.44-6.04) for day workers. Cumulative incidence curves showed a higher cumulative incidence in workers exposed to night shift work compared to day workers after five years. The adjusted HR for incident CVD events were 1.26 (95% CI 0.68-2.33), 1.37 (95% CI 0.74-2.53) and 1.19 (95% CI 0.67-2.12) for employees in the low, middle and high night shift categories compared to employees without night shift work, respectively. CONCLUSIONS The observed tendencies indicate that night shift work might be negatively associated with cardiovascular health. We expect the continued follow-up will clarify the long-term impact of night shift work.
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Wilmanns C, Zechner U, Walter PK, Schulze A. [Impact of the Reflux Origin on the Clinical Stage and Surgical Decision in Primary Varicose Veins]. Zentralbl Chir 2024. [PMID: 38508221 DOI: 10.1055/a-2251-1628] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/22/2024]
Abstract
Reflux and recirculation in primary varicose veins are not yet completely understood, and the contribution of perforator veins is dual.Reflux origin was assessed as junctional (JP, reflux of the greater saphenous junction or groin recurrences) with/without suspect perforator veins (SPV), or perforator phenotype (PP, reflux from SPV only or for statistical purposes from the small saphenous vein). Flow direction and intensity were recorded under Valsalva (JP) or as spontaneous/under distal compression/decompression (SPV) and weighted with one/two points as reflux/reentry, respectively, in the case of SPV. We compared the origin and extent of axial reflux and diameter/flow direction of SPV with the clinical stage by multivariate analysis.Of 107 limbs, 68 presented with JP, 49 combined with SPV, and 39 with PP. CEAP C3-C6 was associated with the presence of SPV (JP and PP) in 45/65 (11/22) limbs with primaries (recurrences) or in 3/16 (0/4), p < 0.01 (p = 0.01), without SPV. C4-C6 at first manifestation, however, was more frequent in JP and axial reflux below the knee in 14/39 limbs (p = 0.01) or above the knee in 3/11 (p = 0.12) compared with PP (5/31). SPV flow at first manifestation was reentry in the case of JP and axial reflux below the knee (estimate -1.62, p = 0.02) or above the knee (0.29, p = 0.81) compared with PP, but diameter of the most dilated perforator vein was higher in the case of JP and axial reflux above the knee (estimate 0.20, p < 0.01) or below the knee (0.04, p = 0.30) compared with PP. Predominant SPV flow was reentry/reflux during peripheral compression/decompression, respectively (p = 0.009).The data suggest that the reflux origin and extent of axial reflux are associated with diameter/flow direction of SPV and clinical stage in primary varicose veins.
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Affiliation(s)
- Christoph Wilmanns
- Klinik für Gefäß-, endovaskuläre und Thoraxchirurgie, Schön Klinik Rendsburg, Rendsburg, Deutschland
| | - Ulrich Zechner
- Molekularbiologie, Labor Dr. Wisplinghoff, Köln, Deutschland
- Institut für Humangenetik, Universitätsklinikum der Johannes-Gutenberg-Universität, Mainz, Deutschland
| | | | - Alicia Schulze
- Institut für medizinische Biometrie, Epidemiologie und Informatik (IMBEI), Universitätsklinikum der Johannes-Gutenberg-Universität, Mainz, Deutschland
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Rosellini M, Omer EA, Schulze A, Ali NT, Boulos JC, Marini F, Küpper JH, Efferth T. Impact of plastic-related compounds on the gene expression signature of HepG2 cells transfected with CYP3A4. Arch Toxicol 2024; 98:525-536. [PMID: 38160208 PMCID: PMC10794370 DOI: 10.1007/s00204-023-03648-4] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Accepted: 11/16/2023] [Indexed: 01/03/2024]
Abstract
The presence of plastic and microplastic within the oceans as well as in marine flora and fauna have caused a multitude of problems that have been the topic of numerous investigations for many years. However, their impact on human health remains largely unknown. Such plastic and microplastic particles have been detected in blood and placenta, underlining their ability to enter the human body. Plastics also contain other compounds, such as plasticizers, antioxidants, or dyes, whose impact on human health is currently being studied. Critical enzymes within the metabolism of endogenous molecules, especially of xenobiotics, are the cytochrome P450 monooxygenases (CYPs). Although their importance in maintaining cellular balance has been confirmed, their interactions with plastics and related products are poorly understood. In this study, the possible relationship between different plastic-related compounds and CYP3A4 as one of the most important CYPs was analyzed using hepatic cells overexpressing this enzyme. Beginning with virtual compound screening and molecular docking of more than 1000 plastic-related compounds, several candidates were identified to interact with CYP3A4. In a second step, RNA-sequencing was used to study in detail the transcriptome-wide gene expression levels affected by the selected compounds. Three candidate molecules ((2,2'-methylenebis(6-tert-butyl-4-methylphenol), 1,1-bis(3,5-di-tert-butyl-2-hydroxyphenyl)ethane, and 2,2'-methylenebis(6-cyclohexyl-4-methylphenol)) had an excellent binding affinity to CYP3A4 in-silico as well as cytotoxic effects and interactions with several metabolic pathways in-vitro. We identified common pathways influenced by all three selected plastic-related compounds. In particular, the suppression of pathways related to mitosis and 'DNA-templated DNA replication' which were confirmed by cell cycle analysis and single-cell gel electrophoresis. Furthermore, several mis-regulated metabolic and inflammation-related pathways were identified, suggesting the induction of hepatotoxicity at different levels. These findings imply that these compounds may cause liver problems subsequently affecting the entire organism.
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Affiliation(s)
- Matteo Rosellini
- Department of Pharmaceutical Biology, Institute of Pharmaceutical and Biomedical Sciences, Johannes Gutenberg University, Staudinger Weg 5, 55128, Mainz, Germany
| | - Ejlal A Omer
- Department of Pharmaceutical Biology, Institute of Pharmaceutical and Biomedical Sciences, Johannes Gutenberg University, Staudinger Weg 5, 55128, Mainz, Germany
| | - Alicia Schulze
- Institute of Medical Biostatistics, Epidemiology and Informatics (IMBEI), Medical Center of the Johannes Gutenberg University, 55122, Mainz, Germany
| | - Nadeen T Ali
- Department of Pharmaceutical Biology, Institute of Pharmaceutical and Biomedical Sciences, Johannes Gutenberg University, Staudinger Weg 5, 55128, Mainz, Germany
| | - Joelle C Boulos
- Department of Pharmaceutical Biology, Institute of Pharmaceutical and Biomedical Sciences, Johannes Gutenberg University, Staudinger Weg 5, 55128, Mainz, Germany
| | - Federico Marini
- Institute of Medical Biostatistics, Epidemiology and Informatics (IMBEI), Medical Center of the Johannes Gutenberg University, 55122, Mainz, Germany
- Research Center for Immunotherapy (FZI), Langenbeckstraße 1, 55131, Mainz, Germany
| | - Jan-Heiner Küpper
- Institute of Biotechnology, Brandenburg University of Technology Cottbus-Senftenberg, 03046, Senftenberg, Germany
| | - Thomas Efferth
- Department of Pharmaceutical Biology, Institute of Pharmaceutical and Biomedical Sciences, Johannes Gutenberg University, Staudinger Weg 5, 55128, Mainz, Germany.
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Huber T, Tripke V, Baumgart J, Bartsch F, Schulze A, Weber S, Heinrich S, Lang H. Computer-assisted intraoperative 3D-navigation for liver surgery: a prospective randomized-controlled pilot study. Ann Transl Med 2023; 11:346. [PMID: 37675318 PMCID: PMC10477660 DOI: 10.21037/atm-22-5489] [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] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Accepted: 04/21/2023] [Indexed: 09/08/2023]
Abstract
Background Liver surgery is the standard of care for primary and many secondary liver tumors. Due to variability and complexity in liver anatomy preoperative imaging is necessary to determine resectability and for planning the surgical strategy. In the last few years, computer-assisted resection planning has been introduced in liver surgery. Aim of this trial was the evaluation of computer-assisted three-dimensional (3D)-navigation for liver surgery. Methods This study was a prospective randomized-controlled pilot trial and patients were randomized in navigated or non-navigated group. Primary end point was the quotient of intraoperative resected volume and planned resection volume. Secondary end points included operation time, resection margin and postoperative complications. 3D reconstructions were performed with MeVis Distant Services (MeVis AG, Bremen, Germany). The navigation system CAS-One Liver (CAScination AG, Bern, Switzerland) was used for intraoperative computer-assisted 3D-navigation. Results The data of 16 patients with 20 liver tumors were used in this analysis. Of these, 8 liver tumors were resected with the utilization of intraoperative navigation. Two postoperative complications were classified grade IIIa or higher. There was no difference in duration of operation (189 vs. 180 min, P=0.970), rate of postoperative complications (n=1 vs. n=1, P=0.696) and length of hospital stay (9 vs. 7 days, P=0.368) between the two groups. Minimal resection margin (0.15 vs. 0.40 cm, P=0.384) and quotient of planned to intraoperative resection volume (0.94 vs. 1.11, P=0.305) were also similar. Conclusions Intraoperative navigation is a technology that can be safely used during liver resection. Surgical accuracy is not yet superior to the current standard of intraoperative orientation. Further technological advances with suitable deformation algorithms and augmented reality systems will enable a further improvement of the technical feasibility.
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Affiliation(s)
- Tobias Huber
- Department of General, Visceral and Transplantation Surgery, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Verena Tripke
- Department of General, Visceral and Transplantation Surgery, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Janine Baumgart
- Department of General, Visceral and Transplantation Surgery, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Fabian Bartsch
- Department of General, Visceral and Transplantation Surgery, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Alicia Schulze
- Institute of Medical Biometry, Epidemiology and Informatics (IMBEI), University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Stefan Weber
- ARTORG Center for Biomedical Engineering Research, University of Bern, Bern, Switzerland
| | - Stefan Heinrich
- Department of General, Visceral and Transplantation Surgery, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Hauke Lang
- Department of General, Visceral and Transplantation Surgery, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
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Rosellini M, Schulze A, Omer EA, Ali NT, Marini F, Küpper JH, Efferth T. The Effect of Plastic-Related Compounds on Transcriptome-Wide Gene Expression on CYP2C19-Overexpressing HepG2 Cells. Molecules 2023; 28:5952. [PMID: 37630204 PMCID: PMC10459118 DOI: 10.3390/molecules28165952] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Revised: 08/02/2023] [Accepted: 08/03/2023] [Indexed: 08/27/2023] Open
Abstract
In recent years, plastic and especially microplastic in the oceans have caused huge problems to marine flora and fauna. Recently, such particles have also been detected in blood, breast milk, and placenta, underlining their ability to enter the human body, presumably via the food chain and other yet-unknown mechanisms. In addition, plastic contains plasticizers, antioxidants, or lubricants, whose impact on human health is also under investigation. At the cellular level, the most important enzymes involved in the metabolism of xenobiotic compounds are the cytochrome P450 monooxygenases (CYPs). Despite their extensive characterization in the maintenance of cellular balance, their interactions with plastic and related products are unexplored. In this study, the possible interactions between several plastic-related compounds and one of the most important cytochromes, CYP2C19, were analyzed. By applying virtual compound screening and molecular docking to more than 1000 commercially available plastic-related compounds, we identified candidates that are likely to interact with this protein. A growth inhibition assay confirmed their cytotoxic activity on a CYP2C19-transfected hepatic cell line. Subsequently, we studied the effect of the selected compounds on the transcriptome-wide gene expression level by conducting RNA sequencing. Three candidate molecules were identified, i.e., 2,2'-methylene bis(6-tert-butyl-4-methylphenol), 1,1-bis(3,5-di-tert-butyl-2-hydroxyphenyl) ethane, and 2,2'-methylene bis(6-cyclohexyl-4-methylphenol)), which bound with a high affinity to CYP2C19 in silico. They exerted a profound cytotoxicity in vitro and interacted with several metabolic pathways, of which the 'cholesterol biosynthesis process' was the most affected. In addition, other affected pathways involved mitosis, DNA replication, and inflammation, suggesting an increase in hepatotoxicity. These results indicate that plastic-related compounds could damage the liver by affecting several molecular pathways.
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Affiliation(s)
- Matteo Rosellini
- Department of Pharmaceutical Biology, Institute of Pharmaceutical and Biomedical Sciences, Johannes Gutenberg University, Staudinger Weg 5, 55128 Mainz, Germany; (M.R.); (E.A.O.); (N.T.A.)
| | - Alicia Schulze
- Institute of Medical Biostatistics, Epidemiology and Informatics (IMBEI), University Medical Center of the Johannes, Gutenberg University, 55122 Mainz, Germany; (A.S.); (F.M.)
| | - Ejlal A. Omer
- Department of Pharmaceutical Biology, Institute of Pharmaceutical and Biomedical Sciences, Johannes Gutenberg University, Staudinger Weg 5, 55128 Mainz, Germany; (M.R.); (E.A.O.); (N.T.A.)
| | - Nadeen T. Ali
- Department of Pharmaceutical Biology, Institute of Pharmaceutical and Biomedical Sciences, Johannes Gutenberg University, Staudinger Weg 5, 55128 Mainz, Germany; (M.R.); (E.A.O.); (N.T.A.)
| | - Federico Marini
- Institute of Medical Biostatistics, Epidemiology and Informatics (IMBEI), University Medical Center of the Johannes, Gutenberg University, 55122 Mainz, Germany; (A.S.); (F.M.)
- Research Center for Immunotherapy (FZI), Langenbeckstraße 1, 55131 Mainz, Germany
| | - Jan-Heiner Küpper
- Institute of Biotechnology, Brandenburg University of Technology Cottbus-Senftenberg, 03046 Senftenberg, Germany;
| | - Thomas Efferth
- Department of Pharmaceutical Biology, Institute of Pharmaceutical and Biomedical Sciences, Johannes Gutenberg University, Staudinger Weg 5, 55128 Mainz, Germany; (M.R.); (E.A.O.); (N.T.A.)
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Schulze A, Tran D, Daum MTJ, Kisilenko A, Maier-Hein L, Speidel S, Distler M, Weitz J, Müller-Stich BP, Bodenstedt S, Wagner M. Ensuring privacy protection in the era of big laparoscopic video data: development and validation of an inside outside discrimination algorithm (IODA). Surg Endosc 2023:10.1007/s00464-023-10078-x. [PMID: 37145173 PMCID: PMC10338566 DOI: 10.1007/s00464-023-10078-x] [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: 01/18/2023] [Accepted: 04/10/2023] [Indexed: 05/06/2023]
Abstract
BACKGROUND Laparoscopic videos are increasingly being used for surgical artificial intelligence (AI) and big data analysis. The purpose of this study was to ensure data privacy in video recordings of laparoscopic surgery by censoring extraabdominal parts. An inside-outside-discrimination algorithm (IODA) was developed to ensure privacy protection while maximizing the remaining video data. METHODS IODAs neural network architecture was based on a pretrained AlexNet augmented with a long-short-term-memory. The data set for algorithm training and testing contained a total of 100 laparoscopic surgery videos of 23 different operations with a total video length of 207 h (124 min ± 100 min per video) resulting in 18,507,217 frames (185,965 ± 149,718 frames per video). Each video frame was tagged either as abdominal cavity, trocar, operation site, outside for cleaning, or translucent trocar. For algorithm testing, a stratified fivefold cross-validation was used. RESULTS The distribution of annotated classes were abdominal cavity 81.39%, trocar 1.39%, outside operation site 16.07%, outside for cleaning 1.08%, and translucent trocar 0.07%. Algorithm training on binary or all five classes showed similar excellent results for classifying outside frames with a mean F1-score of 0.96 ± 0.01 and 0.97 ± 0.01, sensitivity of 0.97 ± 0.02 and 0.0.97 ± 0.01, and a false positive rate of 0.99 ± 0.01 and 0.99 ± 0.01, respectively. CONCLUSION IODA is able to discriminate between inside and outside with a high certainty. In particular, only a few outside frames are misclassified as inside and therefore at risk for privacy breach. The anonymized videos can be used for multi-centric development of surgical AI, quality management or educational purposes. In contrast to expensive commercial solutions, IODA is made open source and can be improved by the scientific community.
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Affiliation(s)
- A Schulze
- Department for General, Visceral and Transplant Surgery, Heidelberg University Hospital, Im Neuenheimer Feld 420, 69120, Heidelberg, Germany
- National Center for Tumor Diseases, Heidelberg, Germany
| | - D Tran
- Department for General, Visceral and Transplant Surgery, Heidelberg University Hospital, Im Neuenheimer Feld 420, 69120, Heidelberg, Germany
- National Center for Tumor Diseases, Heidelberg, Germany
| | - M T J Daum
- Department for General, Visceral and Transplant Surgery, Heidelberg University Hospital, Im Neuenheimer Feld 420, 69120, Heidelberg, Germany
- National Center for Tumor Diseases, Heidelberg, Germany
| | - A Kisilenko
- Department for General, Visceral and Transplant Surgery, Heidelberg University Hospital, Im Neuenheimer Feld 420, 69120, Heidelberg, Germany
- National Center for Tumor Diseases, Heidelberg, Germany
| | - L Maier-Hein
- Division of Intelligent Medical Systems, German Cancer Research Center (Dkfz), Heidelberg, Germany
| | - S Speidel
- Department for Translational Surgical Oncology, National Center for Tumor Diseases, Partner Site Dresden, Dresden, Germany
- Center for the Tactile Internet With Human in the Loop (CeTI), Technische Universität Dresden, Dresden, Germany
| | - M Distler
- Department of Visceral, Thoracic and Vascular Surgery, Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - J Weitz
- Department of Visceral, Thoracic and Vascular Surgery, Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - B P Müller-Stich
- Clarunis, University Center for Gastrointestinal and Liver Disease, Basel, Switzerland
| | - S Bodenstedt
- Department for Translational Surgical Oncology, National Center for Tumor Diseases, Partner Site Dresden, Dresden, Germany
- Center for the Tactile Internet With Human in the Loop (CeTI), Technische Universität Dresden, Dresden, Germany
| | - M Wagner
- Department for General, Visceral and Transplant Surgery, Heidelberg University Hospital, Im Neuenheimer Feld 420, 69120, Heidelberg, Germany.
- National Center for Tumor Diseases, Heidelberg, Germany.
- Center for the Tactile Internet With Human in the Loop (CeTI), Technische Universität Dresden, Dresden, Germany.
- Department of Visceral, Thoracic and Vascular Surgery, Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany.
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Koch M, Zecher D, Lopau K, Weinmann-Menke J, Schulze A, Nashan B, Wenzel U, Banas B, Zeier M, Thaiss F, Sommerer C. Human Leucocyte Antigen-Matching Can Improve Long Term Outcome of Renal Allografts from Donors Older Than 75 Years. Transplant Proc 2023; 55:309-316. [PMID: 36801175 DOI: 10.1016/j.transproceed.2022.12.014] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 09/21/2022] [Accepted: 12/09/2022] [Indexed: 02/21/2023]
Abstract
BACKGROUND Renal transplantation is the therapy of choice for kidney failure. The Eurotransplant Senior Program (ESP) has been established to allocate kidneys ≥65 years to recipients of the same age group considered a regional allocation with short cold ischemia (CIT) but not human-leukocyte-antigen (HLA)-matching. The acceptance of organs aged ≥75 years is also still controversial within the ESP. METHODS In a multicenter approach, 179 kidney grafts ≥75 years (mean donor age 78 years) that were transplanted in 174 patients in 5 German transplant centers were analyzed. The primary focus of the analysis was long-term outcome of the grafts and the impact of CIT, HLA matching, and recipient related risk factors. RESULTS The mean graft survival was 59 months (median 67 months) with a mean donor age of 78.3 ± 2.9 years. Grafts with 0 to 3 HLA-mismatches had a significantly better overall graft survival compared to grafts with ≥4 mismatches (69 months vs 54 months; P = .008). The mean CIT was short (11.9 ± 5.3 hours) and had no impact on graft survival. CONCLUSION Recipients receiving a kidney graft from donors aged ≥75 years can benefit from nearly 5 years of survival with a functioning graft. Even minimal HLA matching may improve long term allograft survival.
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Affiliation(s)
- Martina Koch
- General-, Visceral- and Transplantation Surgery, University Medical Center, Mainz, Germany; Hepatobiliary Surgery and Transplantation, University Medical Center Hamburg-Eppendorf, Germany.
| | - Daniel Zecher
- Department of Nephrology, University Medical Center Regensburg, Germany
| | - Kai Lopau
- Department of Nephrology, University Medical Center Würzburg, Germany
| | - Julia Weinmann-Menke
- Department of Medicine, Section Nephrology; University Medical Center, Mainz, Germany
| | - Alicia Schulze
- Institute of Medical Biostatistics, Epidemiology and Informatics; University Medical Center, Mainz, Germany
| | - Björn Nashan
- Hepatobiliary Surgery and Transplantation, University Medical Center Hamburg-Eppendorf, Germany; Clinic of Hepato-pancreatico-biliary Surgery and The Transplantation Center First Affiliated Hospital, School of Life Sciences and Medical Center University of Sciences & Technology of China, Hefei, Anhui, China
| | - Ulrich Wenzel
- Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Bernhard Banas
- Department of Nephrology, University Medical Center Regensburg, Germany
| | - Martin Zeier
- Nephrology Unit, Renal Center Heidelberg, University Medical Center Heidelberg, Germany
| | - Friedrich Thaiss
- Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Claudia Sommerer
- Nephrology Unit, Renal Center Heidelberg, University Medical Center Heidelberg, Germany
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Schulte C, Mueller C, Escobar JD, Tong T, Lackner K, Schulze A, Blankenberg S, Salomaa V, Wild P, Zeller T. VEGF beta is a candidate biomarker for cardiovascular risk stratification. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.1362] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
The blood-based transcriptome changes in relation to body weight but longitudinal data on specific transcripts are rare. Monocytes play a crucial role in the development of atherosclerosis and coronary artery disease. Monitoring monocytic gene expression patterns could aid to identify biomarkers for improved cardiovascular risk stratification. BMI and diabetes mellitus (T2DM) are associated with coronary artery disease (CAD). There are mRNAs associated with the development of atherosclerosis and CAD, which can be detected in circulating cells. The exact pathways and direct targets have not been explored.
Objective
To apply transcriptome screening and validation analysis to identify novel biomarker candidates associated with longitudinal changes of BMI as cardiovascular risk factors and test association with clinical endpoints.
Methods
Transcriptome-wide monocytic gene expression changes were screened in relation to changes in BMI over a time period of 5 years in 1,092 participants of the Gutenberg Health Study with available transcriptomics data at baseline investigation and at 5-years follow-up. Functional enrichment of BMI-related genes (FDR <0.01) was tested based on pathway databases and selected gene sets. Serum VEGFB levels were quantified and validated in serum from n=1,895 individuals from an independent cohort study (FinRisk). In-vitro, THP1 cells were stimulated with recombinant VEGFB.
Results
143 transcripts showed a significant association with change in BMI over 5 years. Decreased VEGFB mRNA levels strongly associated with increased BMI (p=2.8x10–9). Lower levels of VEGFB mRNA were associated with increased mortality (HRperSD=0.757, 95% CI: 0.647–0.885, p=0.0005) following adjustment for age and sex and incident diabetes (p=0.01). Circulating VEGFB levels inversely correlated with VEGFB mRNA (r=−0.2, p=0.0024) and positively correlated with an increase in BMI (beta=0.226, p=8.4x10–6), type 2 diabetes mellitus risk (HRperSD=1.279, 95% CI: 1.148–1.425, p=7.8x10–6) and all-cause mortality (HRperSD=1.184, 95% CI: 1.045–1.342, p=0.008). Further exploration in n=1,895 individuals from FinRisk revealed an association of increased VEGFB levels with increased risk for heart failure (HRperSD=1.373, 95% CI: 1.210–1.560, p=1.0x10–6) and coronary artery disease (HR=1.018, 95% CI: 1.003–1.034, p=0.019), even after adjustment for BMI. In THP-1 culture, stimulation with VEGFB resulted in downregulation of VEGFB mRNA levels.
Conclusion
Decreased monocytic gene expression of VEGFB is related to increased BMI, increased risk of T2DM and all-cause mortality. Vice versa,circulating VEGFB levels associates positively with BMI, diabetes, mortality as well as heart failure and coronary heart disease. We hypothesize that monocytes regulate VEGFB expression by a negative feed-back mechanism based. Circulating VEGFB is a potential novel biomarker candidate for weight-related diabetes risk and cardiovascular risk evaluation.
Funding Acknowledgement
Type of funding sources: Public grant(s) – National budget only. Main funding source(s): DZHK
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Affiliation(s)
- C Schulte
- University Heart & Vascular Center Hamburg , Hamburg , Germany
| | - C Mueller
- University Heart & Vascular Center Hamburg , Hamburg , Germany
| | - J D Escobar
- The University Medical Center Hamburg-Eppendorf, University Center of Cardiovascular Science, University Heart and vascular Center , Hamburg , Germany
| | - T Tong
- The University Medical Center Hamburg-Eppendorf, University Center of Cardiovascular Science, University Heart and vascular Center , Hamburg , Germany
| | - K Lackner
- Johannes Gutenberg University Mainz (JGU), University Medical Center , Mainz , Germany
| | - A Schulze
- Johannes Gutenberg University Mainz (JGU), University Medical Center , Mainz , Germany
| | - S Blankenberg
- University Heart & Vascular Center Hamburg , Hamburg , Germany
| | - V Salomaa
- National Institute for Health and Welfare (THL), Department of Public Health Solutions , Helsinki , Finland
| | - P Wild
- Center for Thrombosis and Hemostasis , Mainz , Germany
| | - T Zeller
- The University Medical Center Hamburg-Eppendorf, University Center of Cardiovascular Science, University Heart and vascular Center , Hamburg , Germany
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10
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Huber T, Hanke LI, Boedecker C, Vradelis L, Baumgart J, Heinrich S, Bartsch F, Mittler J, Schulze A, Hansen C, Hüttl F, Lang H. Patient-individualized resection planning in liver surgery using 3D print and virtual reality (i-LiVR)-a study protocol for a prospective randomized controlled trial. Trials 2022; 23:403. [PMID: 35562806 PMCID: PMC9100295 DOI: 10.1186/s13063-022-06347-0] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Accepted: 04/23/2022] [Indexed: 11/25/2022] Open
Abstract
Background A multitude of different diseases—benign and malign—can require surgery of the liver. The liver is an especially challenging organ for resection planning due to its unique and interindividually variable anatomy. This demands a high amount of mental imagination from the surgeon in order to plan accordingly - a skill, which takes years of training to acquire and which is difficult to teach. Since the volume of the functional remnant liver is of great importance, parenchyma sparing resections are favoured. 3D reconstructions of computed tomography imaging enable a more precise understanding of anatomy and facilitate resection planning. The modality of presentation of these 3D models ranges from 2D monitors to 3D prints and virtual reality applications. Methods The presented trial compares three different modes of demonstration of a 3D reconstruction of CT scans of the liver, which are 3D print, a demonstration on a regular computer screen or using a head-mounted virtual reality headset, with the current gold standard of viewing the CT scan on a computer screen. The group size was calculated with n=25 each. Patients with major liver resections in a laparoscopic or open fashion are eligible for inclusion. Main endpoint is the comparison of the quotient between planned resection volume and actual resection volume between these groups. Secondary endpoints include usability for the surgical team as well as patient specifics and perioperative outcome measures and teaching issues. Discussion The described study will give insight in systematic planning of liver resections and the comparison of different demonstration modalities of 3D reconstruction of preoperative CT scans and the preference of technology. Especially teaching of these demanding operations is underrepresented in prior investigations. Trial registration Prospective trials registration at the German Clinical Trials register with the registration number DRKS00027865. Registration Date: January 24, 2022. Supplementary Information The online version contains supplementary material available at 10.1186/s13063-022-06347-0.
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Affiliation(s)
- Tobias Huber
- Department of General, Visceral and Transplant Surgery, University Medical Center Mainz, Mainz, Germany.
| | - Laura Isabel Hanke
- Department of General, Visceral and Transplant Surgery, University Medical Center Mainz, Mainz, Germany
| | - Christian Boedecker
- Department of General, Visceral and Transplant Surgery, University Medical Center Mainz, Mainz, Germany
| | - Lukas Vradelis
- Department of General, Visceral and Transplant Surgery, University Medical Center Mainz, Mainz, Germany
| | - Janine Baumgart
- Department of General, Visceral and Transplant Surgery, University Medical Center Mainz, Mainz, Germany
| | - Stefan Heinrich
- Department of General, Visceral and Transplant Surgery, University Medical Center Mainz, Mainz, Germany
| | - Fabian Bartsch
- Department of General, Visceral and Transplant Surgery, University Medical Center Mainz, Mainz, Germany
| | - Jens Mittler
- Department of General, Visceral and Transplant Surgery, University Medical Center Mainz, Mainz, Germany
| | - Alicia Schulze
- Institute of Medical Biostatistics, Epidemiology and Informatics (IMBEI), University Medical Center Mainz, Mainz, Germany
| | - Christian Hansen
- Institute of Simulation and Graphics, Faculty of Informatics, University Magdeburg, Magdeburg, Germany
| | - Florentine Hüttl
- Department of General, Visceral and Transplant Surgery, University Medical Center Mainz, Mainz, Germany
| | - Hauke Lang
- Department of General, Visceral and Transplant Surgery, University Medical Center Mainz, Mainz, Germany
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11
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Kalogirou C, Linxweiler J, Schmucker P, Snaebjornsson MT, Schmitz W, Wach S, Krebs M, Hartmann E, Puhr M, Müller A, Spahn M, Seitz AK, Frank T, Marouf H, Büchel G, Eckstein M, Kübler H, Eilers M, Saar M, Junker K, Röhrig F, Kneitz B, Rosenfeldt MT, Schulze A. MiR-205-driven downregulation of cholesterol biosynthesis through SQLE-inhibition identifies therapeutic vulnerability in aggressive prostate cancer. Nat Commun 2021; 12:5066. [PMID: 34417456 PMCID: PMC8379214 DOI: 10.1038/s41467-021-25325-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2020] [Accepted: 07/29/2021] [Indexed: 12/19/2022] Open
Abstract
Prostate cancer (PCa) shows strong dependence on the androgen receptor (AR) pathway. Here, we show that squalene epoxidase (SQLE), an enzyme of the cholesterol biosynthesis pathway, is overexpressed in advanced PCa and its expression correlates with poor survival. SQLE expression is controlled by micro-RNA 205 (miR-205), which is significantly downregulated in advanced PCa. Restoration of miR-205 expression or competitive inhibition of SQLE led to inhibition of de novo cholesterol biosynthesis. Furthermore, SQLE was essential for proliferation of AR-positive PCa cell lines, including abiraterone or enzalutamide resistant derivatives, and blocked transactivation of the AR pathway. Inhibition of SQLE with the FDA approved antifungal drug terbinafine also efficiently blocked orthotopic tumour growth in mice. Finally, terbinafine reduced levels of prostate specific antigen (PSA) in three out of four late-stage PCa patients. These results highlight SQLE as a therapeutic target for the treatment of advanced PCa.
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Affiliation(s)
- C Kalogirou
- Department of Biochemistry and Molecular Biology, Theodor-Boveri-Institute, Biocenter, Würzburg, Germany
- Department of Urology and Paediatric Urology, University Hospital Würzburg, Würzburg, Germany
| | - J Linxweiler
- Department of Urology, Saarland University, Homburg/Saar, Germany
| | - P Schmucker
- Department of Urology and Paediatric Urology, University Hospital Würzburg, Würzburg, Germany
| | - M T Snaebjornsson
- German Cancer Research Center, Division of Tumor Metabolism and Microenvironment, Heidelberg, Germany
| | - W Schmitz
- Department of Biochemistry and Molecular Biology, Theodor-Boveri-Institute, Biocenter, Würzburg, Germany
| | - S Wach
- Department of Urology, University Hospital Erlangen, Friedrich-Alexander University of Erlangen-Nuremberg, Erlangen, Germany
| | - M Krebs
- Department of Urology and Paediatric Urology, University Hospital Würzburg, Würzburg, Germany
| | - E Hartmann
- Institute of Pathology, Julius Maximilians University and Comprehensive Cancer Center (CCC) Mainfranken, Würzburg, Germany
| | - M Puhr
- Department of Urology, Medical University of Innsbruck, Innsbruck, Austria
| | - A Müller
- Clinic for Diagnostic and Interventional Radiology, Saarland University, Homburg/Saar, Germany
| | - M Spahn
- Center for Urology, Hirslanden Private Hospital Group, Zurich, Switzerland
| | - A K Seitz
- Department of Urology and Paediatric Urology, University Hospital Würzburg, Würzburg, Germany
| | - T Frank
- Department of Urology and Paediatric Urology, University Hospital Würzburg, Würzburg, Germany
| | - H Marouf
- Department of Biochemistry and Molecular Biology, Theodor-Boveri-Institute, Biocenter, Würzburg, Germany
| | - G Büchel
- Department of Biochemistry and Molecular Biology, Theodor-Boveri-Institute, Biocenter, Würzburg, Germany
- Mildred Scheel Early Career Center, University Hospital Würzburg, Würzburg, Germany
| | - M Eckstein
- Institute of Pathology, University Hospital Erlangen, Friedrich-Alexander University of Erlangen-Nuremberg, Erlangen, Germany
| | - H Kübler
- Department of Urology and Paediatric Urology, University Hospital Würzburg, Würzburg, Germany
| | - M Eilers
- Department of Biochemistry and Molecular Biology, Theodor-Boveri-Institute, Biocenter, Würzburg, Germany
| | - M Saar
- Department of Urology, Saarland University, Homburg/Saar, Germany
| | - K Junker
- Department of Urology, Saarland University, Homburg/Saar, Germany
| | - F Röhrig
- Department of Biochemistry and Molecular Biology, Theodor-Boveri-Institute, Biocenter, Würzburg, Germany
| | - B Kneitz
- Department of Urology and Paediatric Urology, University Hospital Würzburg, Würzburg, Germany
| | - M T Rosenfeldt
- Institute of Pathology, Julius Maximilians University and Comprehensive Cancer Center (CCC) Mainfranken, Würzburg, Germany
| | - A Schulze
- Department of Biochemistry and Molecular Biology, Theodor-Boveri-Institute, Biocenter, Würzburg, Germany.
- German Cancer Research Center, Division of Tumor Metabolism and Microenvironment, Heidelberg, Germany.
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12
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Schulze A, Schmittenbecher PP. [Apophyseal avulsion in the pelvic region in childhood and adolescence]. Unfallchirurg 2021; 124:519-525. [PMID: 33938973 DOI: 10.1007/s00113-021-01001-x] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/07/2021] [Indexed: 11/26/2022]
Abstract
BACKGROUND The importance of the apophyseal plates during growth is often underestimated. They act as a muscular insertion and influence the joint mechanics by the load-dependent change in shape. PATHOMECHANISMS An anatomically functional adaptation occurs as protection from overloading. In special kinds of sports with highly dynamic movements, sudden changes of direction and eccentric/concentric muscle activities the resulting stress may exceed the strength of the apophyseal plate. In adolescence this results in a total or partial tearing of the apophysis in the sense of an avulsion injury. In the pelvic region the ischial tuberosity, the anterior superior and inferior iliac spine are mainly affected. DIAGNOSTICS The medical history and clinical diagnostics are supplemented by conventional radiographic imaging. Sectional imaging diagnostics are usually unnecessary. TREATMENT Conservative management by reduced (partial) weight bearing and physiotherapy represents the gold standard in treatment. In cases with a fragment displacement >1.5-2.0 cm and in competitive athletes an open reduction should be considered.
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Affiliation(s)
- A Schulze
- Klinik für Kinderchirurgie, Städtisches Klinikum Karlsruhe, Moltkestr. 90, 76133, Karlsruhe, Deutschland.
| | - P P Schmittenbecher
- Klinik für Kinderchirurgie, Städtisches Klinikum Karlsruhe, Moltkestr. 90, 76133, Karlsruhe, Deutschland
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13
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Kalogirou C, Linxweiler J, Hartmann E, Seitz A, Puhr M, Spahn M, Frank T, Marouf H, Krebs M, Kübler H, Rosenwald A, Saar M, Junker K, Kneitz B, Schmitz W, Rosenfeldt M, Schulze A. Inhibition of cholesterol and steroid synthesis through miR-205 target gene SQLE is an intriguing treatment strategy in various in vitro and in vivo models of prostate cancer. EUR UROL SUPPL 2020. [DOI: 10.1016/s2666-1683(20)33838-6] [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] Open
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14
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Kaur J, Nagy L, Wan B, Saleh H, Schulze A, Raiman J, Inbar-Feigenberg M. The utility of dried blood spot monitoring of branched-chain amino acids for maple syrup urine disease: A retrospective chart review study. Clin Chim Acta 2020; 500:195-201. [DOI: 10.1016/j.cca.2019.10.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 10/15/2019] [Accepted: 10/17/2019] [Indexed: 01/06/2023]
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15
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Meyer R, Schacht S, Buschmann L, Begemann M, Kraft F, Haag N, Kochs A, Schulze A, Kurth I, Elbracht M. Biallelic CSGALNACT1-mutations cause a mild skeletal dysplasia. Bone 2019; 127:446-451. [PMID: 31325655 DOI: 10.1016/j.bone.2019.07.016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Revised: 07/03/2019] [Accepted: 07/14/2019] [Indexed: 11/16/2022]
Abstract
Genetic causes of skeletal disorders are manifold and affect, among others, enzymes of bone and connective tissue synthesis pathways. We present a twelve-year-old boy with a mild skeletal dysplasia, hypermobility of joints and axial malalignment of lower limbs and feet. Exome sequencing revealed a biallelic loss of function mutation in CSGALNACT1, which encodes chondroitin sulfate N-acetylgalactosaminyltransferase 1 and plays a major role in the chondroitin sulfate chain biosynthesis and therefore in the synthesis of glycosaminoglycans. Recently, the first case of a pediatric patient with a mild skeletal dysplasia due to a compound heterozygous large intragenic deletion and a damaging missense variant in CSGALNACT1 was reported. We here identify a second case and the first juvenile patient with a homozygous frameshift variant in CSGALNACT1 which corroborates its role in mild and non-progressive skeletal dysplasia with joint laxity.
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Affiliation(s)
- R Meyer
- Institute of Human Genetics, Medical Faculty, RWTH Aachen University, Aachen, Germany
| | - S Schacht
- Department for Radiology, Medical Faculty, RWTH Aachen University, Aachen, Germany
| | - L Buschmann
- Institute of Human Genetics, Medical Faculty, RWTH Aachen University, Aachen, Germany
| | - M Begemann
- Institute of Human Genetics, Medical Faculty, RWTH Aachen University, Aachen, Germany
| | - F Kraft
- Institute of Human Genetics, Medical Faculty, RWTH Aachen University, Aachen, Germany
| | - N Haag
- Institute of Human Genetics, Medical Faculty, RWTH Aachen University, Aachen, Germany
| | - A Kochs
- Gemeinschaftspraxis Dr. Kochs/Dr. Rode, Aachen, Germany
| | - A Schulze
- Department for Orthopedics, Medical Faculty, RWTH Aachen University, Aachen, Germany
| | - I Kurth
- Institute of Human Genetics, Medical Faculty, RWTH Aachen University, Aachen, Germany
| | - M Elbracht
- Institute of Human Genetics, Medical Faculty, RWTH Aachen University, Aachen, Germany.
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16
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Schulze A, Neudert M. Vorbereitung zur Facharztprüfung HNO. HNO 2019; 67:628-632. [DOI: 10.1007/s00106-019-0707-6] [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]
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17
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Krause K, Sabat R, Witte‐Händel E, Schulze A, Puhl V, Maurer M, Wolk K. Schnitzler 综合征与 CCL2. Br J Dermatol 2019. [DOI: 10.1111/bjd.17670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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18
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Krause K, Sabat R, Witte‐Händel E, Schulze A, Puhl V, Maurer M, Wolk K. CCL2 in Schnitzler syndrome. Br J Dermatol 2019. [DOI: 10.1111/bjd.17654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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19
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Krause K, Sabat R, Witte-Händel E, Schulze A, Puhl V, Maurer M, Wolk K. Association of CCL2 with systemic inflammation in Schnitzler syndrome. Br J Dermatol 2018; 180:859-868. [PMID: 30339714 DOI: 10.1111/bjd.17334] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/14/2018] [Indexed: 12/22/2022]
Abstract
BACKGROUND Schnitzler syndrome (SchS) is a rare autoinflammatory disease characterized by urticarial exanthema, bone and joint alterations, fever and monoclonal gammopathy, which manifest mostly in the second half of life. It involves overactivation of the interleukin (IL)-1 system, but the exact pathophysiological pathways remain largely unknown. OBJECTIVES To identify and characterize the pathogenetic players in SchS. METHODS Blood parameters were quantified in patients with SchS compared with healthy controls and patients with psoriasis and hidradenitis suppurativa using enzyme-linked immunosorbent assay (ELISA). CCL2 expression in cultured primary cells was analysed by quantitative reverse-transcriptase polymerase chain reaction and ELISA. RESULTS CCL2, a chemoattractant for monocytic and further mononuclear immune cells, was found to be significantly elevated in patients with SchS. CCL2 levels showed a positive association with global disease activity, especially with bone pain, but not disease duration, gammopathy, neutrophilia or skin disease. In vitro stimulation assays demonstrated a strong CCL2 production capacity of mononuclear immune cells and fibroblasts, but not epithelial or endothelial cells. Among a range of inflammatory mediators, only IL-1β (immune cells, fibroblasts) and tumour necrosis factor (TNF)-α (fibroblasts) were important CCL2 inducers. TNF-α, but not IL-17, strengthened the CCL2-inducing effect of IL-1β in fibroblasts. Accordingly, CCL2 levels positively correlated with both TNF-α and IL-1β serum levels in patients with SchS. Therapeutic IL-1β blockade decreased CCL2 blood levels in these patients as early as 1 week after the initiation of treatment. CONCLUSIONS CCL2 may be an important component of the pathogenetic cascade leading to bone alterations, and a suitable marker of disease activity in patients with SchS.
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Affiliation(s)
- K Krause
- Dermatological Allergology, Department of Dermatology and Allergy, Charité - Universitätsmedizin Berlin, Charitéplatz 1, 10117, Berlin, Germany.,Autoinflammation Reference Centre Charité, Charité - Universitätsmedizin Berlin, Charitéplatz 1, 10117, Berlin, Germany
| | - R Sabat
- Interdisciplinary Group of Molecular Immunopathology, Dermatology/Medical Immunology and, Charité - Universitätsmedizin Berlin, Charitéplatz 1, 10117, Berlin, Germany.,Psoriasis Research and Treatment Centre, Charité - Universitätsmedizin Berlin, Charitéplatz 1, 10117, Berlin, Germany
| | - E Witte-Händel
- Interdisciplinary Group of Molecular Immunopathology, Dermatology/Medical Immunology and, Charité - Universitätsmedizin Berlin, Charitéplatz 1, 10117, Berlin, Germany.,Psoriasis Research and Treatment Centre, Charité - Universitätsmedizin Berlin, Charitéplatz 1, 10117, Berlin, Germany
| | - A Schulze
- Interdisciplinary Group of Molecular Immunopathology, Dermatology/Medical Immunology and, Charité - Universitätsmedizin Berlin, Charitéplatz 1, 10117, Berlin, Germany.,Psoriasis Research and Treatment Centre, Charité - Universitätsmedizin Berlin, Charitéplatz 1, 10117, Berlin, Germany
| | - V Puhl
- Dermatological Allergology, Department of Dermatology and Allergy, Charité - Universitätsmedizin Berlin, Charitéplatz 1, 10117, Berlin, Germany.,Autoinflammation Reference Centre Charité, Charité - Universitätsmedizin Berlin, Charitéplatz 1, 10117, Berlin, Germany
| | - M Maurer
- Dermatological Allergology, Department of Dermatology and Allergy, Charité - Universitätsmedizin Berlin, Charitéplatz 1, 10117, Berlin, Germany.,Autoinflammation Reference Centre Charité, Charité - Universitätsmedizin Berlin, Charitéplatz 1, 10117, Berlin, Germany
| | - K Wolk
- Interdisciplinary Group of Molecular Immunopathology, Dermatology/Medical Immunology and, Charité - Universitätsmedizin Berlin, Charitéplatz 1, 10117, Berlin, Germany.,Psoriasis Research and Treatment Centre, Charité - Universitätsmedizin Berlin, Charitéplatz 1, 10117, Berlin, Germany.,Berlin-Brandenburg Centre for Regenerative Therapies, Charité - Universitätsmedizin Berlin, Augustenburger Platz 1, 13353, Berlin, Germany
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Coetzee C, Schulze A, Mokwena L, du Toit W, Buica A. Investigation of Thiol Levels in Young Commercial South African Sauvignon blanc and Chenin blanc Wines Using Propiolate Derivatization and GC-MS/MS. S AFR J ENOL VITIC 2018. [DOI: 10.21548/39-2-2683] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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21
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Ros S, Flöter J, Kaymak I, Da Costa C, Houddane A, Dubuis S, Griffiths B, Mitter R, Walz S, Blake S, Behrens A, Brindle KM, Zamboni N, Rider MH, Schulze A. 6-Phosphofructo-2-kinase/fructose-2,6-biphosphatase 4 is essential for p53-null cancer cells. Oncogene 2017; 36:3287-3299. [PMID: 28092678 DOI: 10.1038/onc.2016.477] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [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: 07/29/2015] [Revised: 11/08/2016] [Accepted: 11/15/2016] [Indexed: 01/02/2023]
Abstract
The bifunctional enzyme 6-phosphofructo-2-kinase/fructose-2,6-biphosphatase-4 (PFKFB4) controls metabolic flux through allosteric regulation of glycolysis. Here we show that p53 regulates the expression of PFKFB4 and that p53-deficient cancer cells are highly dependent on the function of this enzyme. We found that p53 downregulates PFKFB4 expression by binding to its promoter and mediating transcriptional repression via histone deacetylases. Depletion of PFKFB4 from p53-deficient cancer cells increased levels of the allosteric regulator fructose-2,6-bisphosphate, leading to increased glycolytic activity but decreased routing of metabolites through the oxidative arm of the pentose-phosphate pathway. PFKFB4 was also required to support the synthesis and regeneration of nicotinamide adenine dinucleotide phosphate (NADPH) in p53-deficient cancer cells. Moreover, depletion of PFKFB4-attenuated cellular biosynthetic activity and resulted in the accumulation of reactive oxygen species and cell death in the absence of p53. Finally, silencing of PFKFB4-induced apoptosis in p53-deficient cancer cells in vivo and interfered with tumour growth. These results demonstrate that PFKFB4 is essential to support anabolic metabolism in p53-deficient cancer cells and suggest that inhibition of PFKFB4 could be an effective strategy for cancer treatment.
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Affiliation(s)
- S Ros
- Gene Expression Analysis Laboratory, Cancer Research UK London Research Institute, London, UK
- Cancer Research UK Cambridge Institute, University of Cambridge, Cambridge, UK
| | - J Flöter
- Theodor-Boveri-Institute, Biocenter, Am Hubland, Würzburg, Germany
| | - I Kaymak
- Theodor-Boveri-Institute, Biocenter, Am Hubland, Würzburg, Germany
| | - C Da Costa
- Adult Stem Cell Laboratory, The Francis Crick Institute, London, UK
| | - A Houddane
- Protein Phosphorylation Unit, de Duve Institute, Université Catholique de Louvain, Brussels, Belgium
| | - S Dubuis
- Institute of Molecular Systems Biology, ETH Zurich, Zurich, Switzerland
| | - B Griffiths
- Gene Expression Analysis Laboratory, Cancer Research UK London Research Institute, London, UK
| | - R Mitter
- Bioinformatics and Biostatistics, The Francis Crick Institute, London, UK
| | - S Walz
- Comprehensive Cancer Center, Core Unit Bioinformatics, Biocenter, Würzburg, Germany
| | - S Blake
- Adult Stem Cell Laboratory, The Francis Crick Institute, London, UK
| | - A Behrens
- Adult Stem Cell Laboratory, The Francis Crick Institute, London, UK
- Faculty of Life Sciences and Medicine, King's College London, Guy's Campus, London, UK
| | - K M Brindle
- Cancer Research UK Cambridge Institute, University of Cambridge, Cambridge, UK
| | - N Zamboni
- Institute of Molecular Systems Biology, ETH Zurich, Zurich, Switzerland
| | - M H Rider
- Protein Phosphorylation Unit, de Duve Institute, Université Catholique de Louvain, Brussels, Belgium
| | - A Schulze
- Gene Expression Analysis Laboratory, Cancer Research UK London Research Institute, London, UK
- Theodor-Boveri-Institute, Biocenter, Am Hubland, Würzburg, Germany
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Schulze A, Loo R, Ryan P, Wormington M, Favia P, Witters L, Collaert N, Bender H, Vandervorst W, Caymax M. Observation and understanding of anisotropic strain relaxation in selectively grown SiGe fin structures. Nanotechnology 2017; 28:145703. [PMID: 28186001 DOI: 10.1088/1361-6528/aa5fbb] [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] [Indexed: 06/06/2023]
Abstract
The performance of heterogeneous 3D transistor structures critically depends on the composition and strain state of the buffer, channel and source/drain regions. In this paper we used an in-line high resolution x-ray diffraction (HRXRD) tool to study in detail the composition and strain in selectively grown SiGe/Ge fin structures with widths down to 20 nm. For this purpose we arranged fins of identical dimensions into larger arrays which were then analyzed using an x-ray beam several tens of micrometers in size. Asymmetric reciprocal space maps measured both parallel and perpendicular to the fins allowed us to extract the lattice parameters in all three spatial directions. Our results demonstrate an anisotropic in-plane strain state of the selectively grown SiGe buffer in case of narrower fins with significantly reduced relaxation in the direction along the fin. This observation was verified using nano-beam electron diffraction, and is explained based on the reduced probability for dislocation half-loops to evolve in trenches narrower than a few times the critical radius. Moreover, we introduce and discuss in detail a methodology for the determination of the composition in case of an anisotropic in-plane strain state which differs from the procedure commonly used for blanket layers. Our findings verify the importance of in-line HRXRD measurements for process development and monitoring as well as the fundamental study of relaxation and defect formation in confined volumes.
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Affiliation(s)
- A Schulze
- imec, Kapeldreef 75, B-3001 Leuven, Belgium
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Dai H, Zhang VW, El-Hattab AW, Ficicioglu C, Shinawi M, Lines M, Schulze A, McNutt M, Gotway G, Tian X, Chen S, Wang J, Craigen WJ, Wong LJ. FBXL4 defects are common in patients with congenital lactic acidemia and encephalomyopathic mitochondrial DNA depletion syndrome. Clin Genet 2017; 91:634-639. [PMID: 27743463 DOI: 10.1111/cge.12894] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [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: 07/29/2016] [Revised: 10/11/2016] [Accepted: 10/11/2016] [Indexed: 11/30/2022]
Abstract
Mutations in FBXL4 have recently been recognized to cause a mitochondrial disorder, with clinical features including early onset lactic acidosis, hypotonia, and developmental delay. FBXL4 sequence analysis was performed in 808 subjects suspected to have a mitochondrial disorder. In addition, 28 samples from patients with early onset of lactic acidosis, but without identifiable mutations in 192 genes known to cause mitochondrial diseases, were examined for FBXL4 mutations. Definitive diagnosis was made in 10 new subjects with a total of 7 novel deleterious variants; 5 null and 2 missense substitutions. All patients exhibited congenital lactic acidemia, most of them with severe encephalopathic presentation, and global developmental delay. Overall, FBXL4 defects account for at least 0.7% (6 out of 808) of subjects suspected to have a mitochondrial disorder, and as high as 14.3% (4 out of 28) in young children with congenital lactic acidosis and clinical features of mitochondrial disease. Including FBLX4 in the mitochondrial diseases panel should be particularly important for patients with congenital lactic acidosis.
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Affiliation(s)
- H Dai
- Baylor Genetics, Houston, TX, USA
| | - V W Zhang
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - A W El-Hattab
- Division of Clinical Genetics and Metabolic Disorders, Pediatric Department, Tawam Hospital, Al-Ain, United Arab Emirates
| | - C Ficicioglu
- Division of Human Genetics and Metabolism, The Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - M Shinawi
- Division of Genetics and Genomics, Washington University School of Medicine, St. Louis, MO, USA
| | - M Lines
- Department of Genetics, Children's Hospital of Eastern Ontario, Ottawa, Ontario, Canada
| | - A Schulze
- Division of Clinical and Metabolic Genetics, The Hospital for Sick Children and University of Toronto, Toronto, Ontario, Canada
| | - M McNutt
- Children's Medical Center, Dallas, TX, USA
| | - G Gotway
- Children's Medical Center, Dallas, TX, USA
| | - X Tian
- Baylor Genetics, Houston, TX, USA
| | - S Chen
- Baylor Genetics, Houston, TX, USA
| | - J Wang
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - W J Craigen
- Baylor Genetics, Houston, TX, USA.,Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - L-J Wong
- Baylor Genetics, Houston, TX, USA.,Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
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Burgmann M, Aicher J, Teichmann L, Hasbargen U, Schulze A, Flemmer AW. Postnatale Sauerstoffsättigung reifer Neugeborener. Geburtshilfe Frauenheilkd 2016. [DOI: 10.1055/s-0036-1592947] [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
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27
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Dobler F, Delius M, Lehner M, Bayer A, Herber-Jonat S, Schulze A, Flemmer AW, Dostert S, Friese K, Mahner S, Hasbargen U. EXIT bei Pierre-Robin-Sequenz – Fallbericht zu perinatalem Management einer Hochrisikogeburt. Geburtshilfe Frauenheilkd 2016. [DOI: 10.1055/s-0036-1592869] [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
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Abstract
The prevalence of congenital hip dysplasia in Germany is 2-4 % and that of hip dislocation is 0.5-1 %. If early therapy is not successful or the hip dysplasia or dislocation is diagnosed too late (children of over 1 year of age) surgical treatment is indicated to increase the femoral coverage. The innominate osteotomy, published by Robert B. Salter 1961, is a worldwide established technique to improve the lateral and ventral coverage of the femoral head in primary or secondary hip dysplasia or dislocation. In this paper we discuss Salter's technique and present indications, the perioperative procedure, operative modifications and operative extensions and demonstrate the anatomical requirements, postoperative biomechanical changes and long-term results.
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Affiliation(s)
- A Schulze
- Universitätsklinikum Aachen (AöR), Pauwelsstr. 30, 52074, Aachen, Deutschland.
| | - M Tingart
- Universitätsklinikum Aachen (AöR), Pauwelsstr. 30, 52074, Aachen, Deutschland
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Lüring C, Tingart M, Zahedi A, Schulze A. [Pelvic osteotomies]. Orthopade 2016; 45:643. [PMID: 27338828 DOI: 10.1007/s00132-016-3296-z] [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] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- C Lüring
- Orthopädische Klinik, Klinikum Dortmund gGgmbH, Beurhausstraße 40, 44137, Dortmund, Deutschland.
| | - M Tingart
- Klinik für Orthopädie, Uniklinikum RWTH Aachen, Pauwelsstraße 30, 52074, Aachen, Deutschland.
| | - A Zahedi
- Orthopädische Klinik, Klinikum Dortmund gGgmbH, Beurhausstraße 40, 44137, Dortmund, Deutschland
| | - A Schulze
- Klinik für Orthopädie, Uniklinikum RWTH Aachen, Pauwelsstraße 30, 52074, Aachen, Deutschland
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Schulze A, Tran C, Levandovskiy V, Patel V, Cortez MA. Systemic availability of guanidinoacetate affects GABAA receptor function and seizure threshold in GAMT deficient mice. Amino Acids 2016; 48:2041-7. [PMID: 26898547 DOI: 10.1007/s00726-016-2197-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Accepted: 02/08/2016] [Indexed: 11/29/2022]
Abstract
Deficiency of guanidinoacetate methyltransferase (GAMT) causes creatine depletion and guanidinoacetate accumulation in brain with the latter deemed to be responsible for the severe seizure disorder seen in affected patients. We studied electrical brain activity and GABAA mediated mechanisms of B6J.Cg-Gamt(tm1Isb) mice. Electrocorticographic (ECoG) monitoring of pharmacological treatments with ornithine (5 % in drinking water for 5-18 days) and/or Picrotoxin (PTX) (a GABAA receptor antagonist) (1.5 mg/kg, I.P.) in Gamt(MUT) and Gamt(WT) groups [n = 3, mean age (SEM) = 6.9 (0.2) weeks]. Mice were fitted with two frontal and two parietal epidural electrodes under ketamine/xylazine anesthesia. Baseline and test recordings were performed for determination of seizure activity over a 2 h period. The ECoG baseline of Gamt(MUT) exhibited an abnormal monotonous cortical rhythm (7-8 Hz) with little variability during awake and sleep states compared to wild type recordings. Ornithine treatment and also PTX administration led to a relative normalization of the Gamt(MUT) ECoG phenotype. Gamt(WT) on PTX exhibited electro-behavioral seizures, whereas the Gamt(MUT) did not have PTX induced seizures at the same PTX dose. Gamt(MUT) treated with both ornithine and PTX did not show electro-behavioral seizures while ornithine elevated the PTX seizure threshold of Gamt(MUT) mice even further. These data demonstrate: (1) that there is expression of electrical seizure activity in this Gamt-deficient transgenic mouse strain, and (2) that the systemic availability of guanidinoacetate affects GABAA receptor function and seizure thresholds. These findings are directly and clinically relevant for patients with a creatine-deficiency syndrome due to genetic defects in GAMT and provide a rational basis for a combined ornithine/picrotoxin therapeutic intervention.
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Affiliation(s)
- A Schulze
- Program of Genetics and Genome Biology, Peter Gilgan Center for Research and Learning, The Hospital for Sick Children, 555 University Avenue, Toronto, ON, M5G 1X8, Canada. .,Department of Pediatrics, University of Toronto, Toronto, ON, Canada.
| | - C Tran
- Program of Genetics and Genome Biology, Peter Gilgan Center for Research and Learning, The Hospital for Sick Children, 555 University Avenue, Toronto, ON, M5G 1X8, Canada.,Center for Molecular Diseases, Lausanne University Hospital, Lausanne, Switzerland
| | - V Levandovskiy
- Program of Genetics and Genome Biology, Peter Gilgan Center for Research and Learning, The Hospital for Sick Children, 555 University Avenue, Toronto, ON, M5G 1X8, Canada
| | - V Patel
- Program of Genetics and Genome Biology, Peter Gilgan Center for Research and Learning, The Hospital for Sick Children, 555 University Avenue, Toronto, ON, M5G 1X8, Canada
| | - M A Cortez
- Department of Pediatrics, University of Toronto, Toronto, ON, Canada.,Program of Brain and Behavior Neuroscience and Mental Health, Peter Gilgan Center for Research and Learning, The Hospital for Sick Children, Toronto, ON, Canada
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Abstract
The zeta potential of membrane surfaces and the resulting electrostatic interactions are determining factors of membrane fouling. This publication presents the impact of salt concentration and pH value on these interactions.
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Affiliation(s)
- D. Breite
- Leibniz Institute of Surface Modification
- Leipzig
- Germany
| | - M. Went
- Leibniz Institute of Surface Modification
- Leipzig
- Germany
| | - A. Prager
- Leibniz Institute of Surface Modification
- Leipzig
- Germany
| | - A. Schulze
- Leibniz Institute of Surface Modification
- Leipzig
- Germany
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Breite D, Went M, Thomas I, Prager A, Schulze A. Particle adsorption on a polyether sulfone membrane: how electrostatic interactions dominate membrane fouling. RSC Adv 2016. [DOI: 10.1039/c6ra13787c] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This study presents a new method focussing on electrostatic interactions during fouling of microfiltration membranes.
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Affiliation(s)
- D. Breite
- Leibniz Institute of Surface Modification
- Leipzig
- Germany
| | - M. Went
- Leibniz Institute of Surface Modification
- Leipzig
- Germany
| | - I. Thomas
- Leibniz Institute of Surface Modification
- Leipzig
- Germany
| | - A. Prager
- Leibniz Institute of Surface Modification
- Leipzig
- Germany
| | - A. Schulze
- Leibniz Institute of Surface Modification
- Leipzig
- Germany
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Lee B, Diaz GA, Rhead W, Lichter-Konecki U, Feigenbaum A, Berry SA, Le Mons C, Bartley J, Longo N, Nagamani SC, Berquist W, Gallagher RC, Harding CO, McCandless SE, Smith W, Schulze A, Marino M, Rowell R, Coakley DF, Mokhtarani M, Scharschmidt BF. Glutamine and hyperammonemic crises in patients with urea cycle disorders. Mol Genet Metab 2016; 117:27-32. [PMID: 26586473 PMCID: PMC4915945 DOI: 10.1016/j.ymgme.2015.11.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Revised: 11/10/2015] [Accepted: 11/10/2015] [Indexed: 12/30/2022]
Abstract
UNLABELLED Blood ammonia and glutamine levels are used as biomarkers of control in patients with urea cycle disorders (UCDs). This study was undertaken to evaluate glutamine variability and utility as a predictor of hyperammonemic crises (HACs) in UCD patients. METHODS The relationships between glutamine and ammonia levels and the incidence and timing of HACs were evaluated in over 100 adult and pediatric UCD patients who participated in clinical trials of glycerol phenylbutyrate. RESULTS The median (range) intra-subject 24-hour coefficient of variation for glutamine was 15% (8-29%) as compared with 56% (28%-154%) for ammonia, and the correlation coefficient between glutamine and concurrent ammonia levels varied from 0.17 to 0.29. Patients with baseline (fasting) glutamine values >900 μmol/L had higher baseline ammonia levels (mean [SD]: 39.6 [26.2]μmol/L) than patients with baseline glutamine ≤ 900 μmol/L (26.6 [18.0]μmol/L). Glutamine values >900 μmol/L during the study were associated with an approximately 2-fold higher HAC risk (odds ratio [OR]=1.98; p=0.173). However, glutamine lost predictive significance (OR=1.47; p=0.439) when concomitant ammonia was taken into account, whereas the predictive value of baseline ammonia ≥ 1.0 upper limit of normal (ULN) was highly statistically significant (OR=4.96; p=0.013). There was no significant effect of glutamine >900 μmol/L on time to first HAC crisis (hazard ratio [HR]=1.14; p=0.813), but there was a significant effect of baseline ammonia ≥ 1.0 ULN (HR=4.62; p=0.0011). CONCLUSIONS The findings in this UCD population suggest that glutamine is a weaker predictor of HACs than ammonia and that the utility of the predictive value of glutamine will need to take into account concurrent ammonia levels.
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Affiliation(s)
- B Lee
- Baylor College of Medicine, Houston, TX, USA.
| | - G A Diaz
- Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - W Rhead
- The Medical College of Wisconsin, Milwaukee, WI, USA
| | | | | | - S A Berry
- Univ. of Minnesota, Minneapolis, MN, USA
| | - C Le Mons
- National Urea Cycle Disorders Foundation, Pasadena, CA, USA
| | - J Bartley
- Miller Children's Hospital, Long Beach, CA, USA
| | - N Longo
- Univ. of UT, Salt Lake City, UT, USA
| | | | | | | | | | - S E McCandless
- Case Western Reserve Univ. Medical Center, Cleveland, OH, USA
| | - W Smith
- Maine Medical Ctr., Portland, ME, USA
| | - A Schulze
- The Hospital for Sick Children, Univ. of Toronto, Canada
| | - M Marino
- Oregon Health Sciences, Portland, OR, USA
| | - R Rowell
- MED Technical Consulting, Inc., Union City, CA, USA
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Schulze A, Cao R, Eyben P, Hantschel T, Vandervorst W. Outwitting the series resistance in scanning spreading resistance microscopy. Ultramicroscopy 2015; 161:59-65. [PMID: 26624516 DOI: 10.1016/j.ultramic.2015.10.029] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [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: 05/13/2015] [Revised: 10/27/2015] [Accepted: 10/28/2015] [Indexed: 11/18/2022]
Abstract
The performance of nanoelectronics devices critically depends on the distribution of active dopants inside these structures. For this reason, dopant profiling has been defined as one of the major metrology challenges by the international technology roadmap of semiconductors. Scanning spreading resistance microscopy (SSRM) has evolved as one of the most viable approaches over the last decade due to its excellent spatial resolution, sensitivity and quantification accuracy. However, in case of advanced device architectures like fins and nanowires a proper measurement of the spreading resistance is often hampered by the increasing impact of parasitic series resistances (e.g. bulk series resistance) arising from the confined nature of the aforementioned structures. In order to overcome this limitation we report in this paper the development and implementation of a novel SSRM mode (fast Fourier transform-SSRM: FFT-SSRM) which essentially decouples the spreading resistance from parasitic series resistance components. We show that this can be achieved by a force modulation (leading to a modulated spreading resistance signal) in combination with a lock-in deconvolution concept. In this paper we first introduce the principle of operation of the technique. We discuss in detail the underlying physical mechanisms as well as the technical implementation on a state-of-the-art atomic force microscope (AFM). We demonstrate the performance of FFT-SSRM and its ability to remove substantial series resistance components in practice. Eventually, the possibility of decoupling the spreading resistance from the intrinsic probe resistance will be demonstrated and discussed.
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Affiliation(s)
- A Schulze
- IMEC, Kapeldreef 75, 3001 Leuven, Belgium.
| | - R Cao
- IMEC, Kapeldreef 75, 3001 Leuven, Belgium
| | - P Eyben
- IMEC, Kapeldreef 75, 3001 Leuven, Belgium
| | | | - W Vandervorst
- IMEC, Kapeldreef 75, 3001 Leuven, Belgium; KU Leuven, Department of Physics and Astronomy, Celestijnenlaan 200D, 3001 Leuven, Belgium
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Simoen E, Eneman G, Hikavyy AY, Loo R, Gupta S, Merckling C, Alian A, Schulze A, Caymax M, Langer R, Barla K, Claeys C. (Invited) On the Electrical Activity of Extended Defects in High-Mobility Channel Materials. ACTA ACUST UNITED AC 2015. [DOI: 10.1149/06910.0119ecst] [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: 11/16/2022]
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37
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Lewis CA, Brault C, Peck B, Bensaad K, Griffiths B, Mitter R, Chakravarty P, East P, Dankworth B, Alibhai D, Harris AL, Schulze A. SREBP maintains lipid biosynthesis and viability of cancer cells under lipid- and oxygen-deprived conditions and defines a gene signature associated with poor survival in glioblastoma multiforme. Oncogene 2015; 34:5128-40. [PMID: 25619842 DOI: 10.1038/onc.2014.439] [Citation(s) in RCA: 159] [Impact Index Per Article: 17.7] [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: 04/06/2014] [Revised: 11/04/2014] [Accepted: 12/05/2014] [Indexed: 12/16/2022]
Abstract
Oxygen and nutrient limitation are common features of the tumor microenvironment and are associated with cancer progression and induction of metastasis. The inefficient vascularization of tumor tissue also limits the penetration of other serum-derived factors, such as lipids and lipoproteins, which can be rate limiting for cell proliferation and survival. Here we have investigated the effect of hypoxia and serum deprivation on sterol regulatory element-binding protein (SREBP) activity and the expression of lipid metabolism genes in human glioblastoma multiforme (GBM) cancer cells. We found that SREBP transcriptional activity was induced by serum depletion both in normoxic and hypoxic cells and that activation of SREBP was required to maintain the expression of fatty acid and cholesterol metabolism genes under hypoxic conditions. Moreover, expression of stearoyl-CoA desaturase, the enzyme required for the generation of mono-unsaturated fatty acids, and fatty acid-binding protein 7, a regulator of glioma stem cell function, was strongly dependent on SREBP function. Inhibition of SREBP function blocked lipid biosynthesis in hypoxic cancer cells and impaired cell survival under hypoxia and in a three-dimensional spheroid model. Finally, gene expression analysis revealed that SREBP defines a gene signature that is associated with poor survival in glioblastoma.
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Affiliation(s)
- C A Lewis
- Gene Expression Analysis Laboratory, Cancer Research UK London Research Institute, London, UK
| | - C Brault
- Theodor-Boveri-Institute, Biocenter, Am Hubland, Würzburg, Germany
| | - B Peck
- Gene Expression Analysis Laboratory, Cancer Research UK London Research Institute, London, UK
| | - K Bensaad
- CRUK Growth Factor Group, The Weatherall Institute of Molecular Medicine, University of Oxford, Headington, Oxford, UK
| | - B Griffiths
- Gene Expression Analysis Laboratory, Cancer Research UK London Research Institute, London, UK
| | - R Mitter
- Bioinformatics and Biostatistics Service, Cancer Research UK London Research Institute, London, UK
| | - P Chakravarty
- Bioinformatics and Biostatistics Service, Cancer Research UK London Research Institute, London, UK
| | - P East
- Bioinformatics and Biostatistics Service, Cancer Research UK London Research Institute, London, UK
| | - B Dankworth
- Theodor-Boveri-Institute, Biocenter, Am Hubland, Würzburg, Germany
| | - D Alibhai
- Light Microscopy Core, Cancer Research UK London Research Institute, London, UK
| | - A L Harris
- CRUK Growth Factor Group, The Weatherall Institute of Molecular Medicine, University of Oxford, Headington, Oxford, UK
| | - A Schulze
- Gene Expression Analysis Laboratory, Cancer Research UK London Research Institute, London, UK
- Theodor-Boveri-Institute, Biocenter, Am Hubland, Würzburg, Germany
- Comprehensive Cancer Center Mainfranken Würzburg, Germany
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Quack V, Rath B, Schenker H, Schulze A, El Mansy Y, Tingart M, Betsch M. [Fusion in adolescent idiopathic scoliosis : Anterior, posterior or combined? One-stage or two-stage?]. Orthopade 2015; 44:879-84. [PMID: 26376986 DOI: 10.1007/s00132-015-3164-2] [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] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Scoliosis is a complex, three-dimensional spinal deformity with various causes. Adolescent idiopathic scoliosis (AIS) is the most common form. Surgical treatment is indicated for curves greater than 45-50° meaured using the Cobb method. We can distinguish among posterior, anterior or combined surgical procedures. Today, the posterior, transpedicular approach has revolutionized scoliosis surgery. This review gives an overview of current surgical options in scoliosis treatment.
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Affiliation(s)
- V Quack
- Klinik für Orthopädie, RWTH Aachen, Universitätsklinikum Aachen, Pauwelsstraße 30, 52074, Aachen, Deutschland.
| | - B Rath
- Klinik für Orthopädie, RWTH Aachen, Universitätsklinikum Aachen, Pauwelsstraße 30, 52074, Aachen, Deutschland
| | - H Schenker
- Klinik für Orthopädie, RWTH Aachen, Universitätsklinikum Aachen, Pauwelsstraße 30, 52074, Aachen, Deutschland
| | - A Schulze
- Klinik für Orthopädie, RWTH Aachen, Universitätsklinikum Aachen, Pauwelsstraße 30, 52074, Aachen, Deutschland
| | - Y El Mansy
- Klinik für Orthopädie, RWTH Aachen, Universitätsklinikum Aachen, Pauwelsstraße 30, 52074, Aachen, Deutschland
| | - M Tingart
- Klinik für Orthopädie, RWTH Aachen, Universitätsklinikum Aachen, Pauwelsstraße 30, 52074, Aachen, Deutschland
| | - M Betsch
- Klinik für Orthopädie, RWTH Aachen, Universitätsklinikum Aachen, Pauwelsstraße 30, 52074, Aachen, Deutschland
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Förster KM, Herber-Jonat S, Huebener C, Hasbargen U, Schmitz C, Schramm R, Lehner M, Stehr M, Schulze A, Flemmer AW. [Establishment of a Neonatal ECMO Programme on the Basis of a Special Training Programme--A 6-year Analysis]. Z Geburtshilfe Neonatol 2015; 219:274-80. [PMID: 26378775 DOI: 10.1055/s-0035-1547298] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
BACKGROUND Internationally the need for neonatal ECMO is decreasing and the Extracorporeal Life Support Organization (ELSO) recommends that centres providing neonatal ECMO should treat at least 6 children per year. METHOD After a one-year training programme and preparation of the clinical application, neonatal ECMO was established and subsequently 41 infants [median age 1 day (1-172 days), median weight 3.25 kg (1.27-5.79 kg)] with severe respiratory failure have been treated within a 6-year period (fall 2008-fall 2014). For rescue therapy we provide inhaled nitric oxide, high-frequency oscillation and other differentiated ventilator strategies. Parallel to the clinical use of ECMO all employees have been trained in a special programme at 3-monthly intervals. RESULTS By establishing an elaborate training programme and concentrating the treatment of critically ill newborns in one centre, the expertise of both running and preventing of neonatal ECMO due to pulmonary failure can be achieved. The diagnoses correlate to those of other centres which perform neonatal ECMO. 13 infants needed ECMO. The resulting overall survival rate was 11/12 (91.7%) infants treated with ECMO with a curative approach. All patients could be weaned from ECMO. CONCLUSION In the context of a specialised university hospital with all treatment options for critically ill newborns and with the establishment of a specialised training programme, neonatal ECMO for pulmonary failure can achieve equally good results in comparison to those of national and international ECMO centres.
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Affiliation(s)
- K M Förster
- Kinderklinik und Kinderpoliklinik im Dr. von Haunerschen Kinderspital am Klinikum der Universität, Neonatologie der Kinderklinik am Perinatalzentrum der LMU München, Campus Großhadern, München
| | - S Herber-Jonat
- Kinderklinik und Kinderpoliklinik im Dr. von Haunerschen Kinderspital am Klinikum der Universität, Neonatologie der Kinderklinik am Perinatalzentrum der LMU München, Campus Großhadern, München
| | - C Huebener
- Klinik und Poliklinik für Frauenheilkunde und Geburtshilfe am Klinikum der Universität, Perinatalzentrum der LMU München, Campus Großhadern, München
| | - U Hasbargen
- Klinik und Poliklinik für Frauenheilkunde und Geburtshilfe am Klinikum der Universität, Perinatalzentrum der LMU München, Campus Großhadern, München
| | - C Schmitz
- Herzchirurgische Klinik und Poliklinik am Klinikum der Universität, München
| | - R Schramm
- Herzchirurgische Klinik und Poliklinik am Klinikum der Universität, München
| | - M Lehner
- Kinderchirurgische Klinik und Poliklinik im Dr. von Haunerschen Kinderspital am Klinikum der Universität, München
| | - M Stehr
- Klinik für Kinderchirurgie und Kinderurologie, Cnopf'sche Kinderklinik/Klinik Hallerwiese, Nürnberg
| | - A Schulze
- Kinderklinik und Kinderpoliklinik im Dr. von Haunerschen Kinderspital am Klinikum der Universität, Neonatologie der Kinderklinik am Perinatalzentrum der LMU München, Campus Großhadern, München
| | - A W Flemmer
- Kinderklinik und Kinderpoliklinik im Dr. von Haunerschen Kinderspital am Klinikum der Universität, Neonatologie der Kinderklinik am Perinatalzentrum der LMU München, Campus Großhadern, München
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40
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Studer D, Hasler CC, Schulze A. [Treatment of early onset scoliosis : How far can we go?]. Orthopade 2015; 44:896-904. [PMID: 26345169 DOI: 10.1007/s00132-015-3163-3] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND Recently, inconsistent definitions of early onset scoliosis (EOS) and a wide variety of treatment options have been observed. OBJECTIVES To clearly define the term EOS, to depict non-operative and operative treatment options, and to present the limitations of the boundaries of these techniques. METHODS Review of the literature, including conference presentations and expert opinions, in addition to personal experiences. RESULTS Early onset scoliosis (EOS) refers to spine deformity that is present before 10 years of age, regardless of etiology. All existing operative treatment options share a high risk of complications. Therefore, non-operative treatment should act as a time-buying approach to postpone surgery. DISCUSSION Awareness of treatment options and their specific indications, in addition to respecting each patient's individual needs and feasibilities, are crucial for the optimal outcome.
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Affiliation(s)
- D Studer
- Universitätskinderspital beider Basel, Spitalstrasse 33, 4056, Basel, Schweiz.
| | - C C Hasler
- Universitätskinderspital beider Basel, Spitalstrasse 33, 4056, Basel, Schweiz
| | - A Schulze
- Universitätskinderspital beider Basel, Spitalstrasse 33, 4056, Basel, Schweiz
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Eyben P, Bisiaux P, Schulze A, Nazir A, Vandervorst W. Fast Fourier transform scanning spreading resistance microscopy: a novel technique to overcome the limitations of classical conductive AFM techniques. Nanotechnology 2015; 26:355702. [PMID: 26245715 DOI: 10.1088/0957-4484/26/35/355702] [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] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A new atomic force microscopy (AFM)-based technique named fast Fourier transform scanning spreading-resistance microscopy (FFT-SSRM) has been developed. FFT-SSRM offers the ability to isolate the local spreading resistance (Sr) from the parasitic series resistance (probe, bulk, and back contact). The parasitic series resistance limits the use of classical SSRM in confined volumes and on very highly doped materials, two increasingly important situations in nanoelectronic components. This is realized via a force modulation at controlled frequency (affecting the SR component) and the extraction of the resistance amplitude at the modulation frequency, performing an FFT-based lock-in deconvolution. A systematic evaluation of the FFT-SSRM performances (i.e., resolution, dynamic range, sensitivity, and repeatability) is presented. The impact of various parameters (i.e., modulation frequency and amplitude or cutoff frequency of the current amplifier) on the performances of FFT-SSRM has been evaluated. We demonstrate the possibility to overcome sensitivity losses due to tip saturation in highly doped material and the utility of the technique in two different structures, presenting isolated and confined volumes.
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Affiliation(s)
- P Eyben
- IMEC, Kapeldreef 75, B-3001, Leuven, Belgium
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Thiel A, Schetelig J, Pönisch W, Schäfer-Eckart K, Aulitzky W, Peter N, Schulze A, Maschmeyer G, Neugebauer S, Herbst R, Hänel A, Morgner A, Kroschinsky F, Bornhäuser M, Lange T, Wilhelm M, Niederwieser D, Ehninger G, Fiedler F, Hänel M. Mito-FLAG with Ara-C as bolus versus continuous infusion in recurrent or refractory AML—long-term results of a prospective randomized intergroup study of the East German Study Group Hematology/Oncology (OSHO) and the Study Alliance Leukemia (SAL). Ann Oncol 2015; 26:1434-40. [DOI: 10.1093/annonc/mdv205] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Accepted: 04/21/2015] [Indexed: 11/13/2022] Open
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Lamparter J, Schulze A, Riedel J, Wasielica-Poslednik J, König J, Pfeiffer N, Hoffmann EM. Peripapillary Choroidal Thickness and Choroidal Area in Glaucoma, Ocular Hypertension and Healthy Subjects by SD-OCT. Klin Monbl Augenheilkd 2015; 232:390-4. [PMID: 25902084 DOI: 10.1055/s-0035-1545819] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
BACKGROUND The exact pathogenesis of open angle glaucoma and ocular hypertension remains unclear. Hemodynamic influences are discussed as potential risk factors and the choroid may play an important role in the pathogenesis of open angle glaucoma or ocular hypertension. The current study investigates peripapillary choroidal thickness and choroidal area in patients with open angle glaucoma, subjects with ocular hypertension and healthy subjects using spectral-domain OCT. It furthermore assesses the association between peripapillary choroidal thickness and age, central corneal thickness, refractive error and intraocular pressure. PATIENTS AND METHODS Prospectively recorded data of 213 eyes of 177 open angle glaucoma patients, 73 eyes of 50 subjects with ocular hypertension and 152 eyes of 116 healthy control subjects were analyzed by fitting a linear mixed model including age and disease. RESULTS Peripapillary choroidal thickness was thinnest in glaucoma patients (125 µm), followed by healthy subjects (127 µm) and ocular hypertensive subjects (135 µm). A marginally significant difference was present between ocular hypertension and glaucoma (p=0.059). Thickest choroids were found superiorly and thinnest choroids inferiorly. Choroidal area was highest in the supero-nasal and lowest in the infero-temporal sectors. Choroidal thickness decreased with age, no significant correlation was evident between peripapillary choroidal thickness and refractive error or intraocular pressure. Peripapillary choroidal thickness and central corneal thickness are significantly negative correlated in healthy subjects. CONCLUSIONS There is a trend towards thicker choroids in ocular hypertensive subjects compared to healthy subjects or glaucoma patients. Thickest choroids are found superiorly, thinnest inferiorly. Interestingly, choroidal area is thinnest in the temporal-inferior sector, one of the regions where glaucomatous damage tends to start.
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Affiliation(s)
- J Lamparter
- Department of Ophthalmology, University Medical Centre of the Johannes Gutenberg-University Mainz, Mainz (Head of Department: Prof. Dr. med. Norbert Pfeiffer)
| | - A Schulze
- Department of Ophthalmology, University Medical Centre of the Johannes Gutenberg-University Mainz, Mainz (Head of Department: Prof. Dr. med. Norbert Pfeiffer)
| | - J Riedel
- Department of Ophthalmology, University Medical Centre of the Johannes Gutenberg-University Mainz, Mainz (Head of Department: Prof. Dr. med. Norbert Pfeiffer)
| | - J Wasielica-Poslednik
- Department of Ophthalmology, University Medical Centre of the Johannes Gutenberg-University Mainz, Mainz (Head of Department: Prof. Dr. med. Norbert Pfeiffer)
| | - J König
- Institute of Medical Biostatistics, Epidemiology and Informatics (IMBEI), University Medical Centre of the Johannes Gutenberg University Mainz, Mainz (Head of Department: Prof. Dr. rer. nat. Maria Blettner)
| | - N Pfeiffer
- Department of Ophthalmology, University Medical Centre of the Johannes Gutenberg-University Mainz, Mainz (Head of Department: Prof. Dr. med. Norbert Pfeiffer)
| | - E M Hoffmann
- Department of Ophthalmology, University Medical Centre of the Johannes Gutenberg-University Mainz, Mainz (Head of Department: Prof. Dr. med. Norbert Pfeiffer)
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Förster KM, Immler S, Ensslen M, Flemmer A, Schulze A, von Poblotzki M, Genzel-Boroviczény O, Heinen F, Hilgendorff A. [Indications and concept of follow-up care of home-monitoring for premature and risk infants]. Klin Padiatr 2015; 227:72-9. [PMID: 25751680 DOI: 10.1055/s-0034-1395663] [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] [Indexed: 10/23/2022]
Abstract
The pros and cons of home monitoring especially for premature infants with continuing apneic episodes and/or chronic lung disease are an ongoing discussion. The controversy spans socio-economic requirements, medical indication as well as patient and family needs. Here, the costs of home monitoring and follow-up care on the one hand and longer hospitalization times on the other need to be considered. This article aims to create a basis for this discussion by summarizing current evidence for the indications and considerations for differential diagnoses while also outlining the established follow-up program for these patients at the Dr. v. Hauner Children's Hospital at the Ludwig-Maximilians-University Munich, Germany.
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Affiliation(s)
- K M Förster
- Neonatologie des Dr. von Haunerschen Kinderspitals der Ludwig-Maximilians-Universität München am Perinatalzentrum Campus Großhadern, Klinikum der Universität, München
| | - S Immler
- Neonatologie des Dr. von Haunerschen Kinderspitals der Ludwig-Maximilians-Universität München am Perinatalzentrum Campus Innenstadt, Klinikum der Universität, München
| | - M Ensslen
- Pädiatrische Neurologie, Entwicklungsneurologie und Sozialpädiatrie im Dr. von Haunerschen Kinderspital der Ludwig-Maximilians-Universität München, Campus Innenstadt, Klinikum der Universität, München
| | - A Flemmer
- Neonatologie des Dr. von Haunerschen Kinderspitals der Ludwig-Maximilians-Universität München am Perinatalzentrum Campus Großhadern, Klinikum der Universität, München
| | - A Schulze
- Neonatologie des Dr. von Haunerschen Kinderspitals der Ludwig-Maximilians-Universität München am Perinatalzentrum Campus Großhadern, Klinikum der Universität, München
| | - M von Poblotzki
- Neonatologie des Dr. von Haunerschen Kinderspitals der Ludwig-Maximilians-Universität München am Perinatalzentrum Campus Innenstadt, Klinikum der Universität, München
| | - O Genzel-Boroviczény
- Neonatologie des Dr. von Haunerschen Kinderspitals der Ludwig-Maximilians-Universität München am Perinatalzentrum Campus Innenstadt, Klinikum der Universität, München
| | - F Heinen
- Pädiatrische Neurologie, Entwicklungsneurologie und Sozialpädiatrie im Dr. von Haunerschen Kinderspital der Ludwig-Maximilians-Universität München, Campus Innenstadt, Klinikum der Universität, München
| | - A Hilgendorff
- Neonatologie des Dr. von Haunerschen Kinderspitals der Ludwig-Maximilians-Universität München am Perinatalzentrum Campus Großhadern, Klinikum der Universität, München
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Mola-Schenzle E, Staffler A, Klemme M, Pellegrini F, Molinaro G, Parhofer KG, Messner H, Schulze A, Flemmer AW. Clinically stable very low birthweight infants are at risk for recurrent tissue glucose fluctuations even after fully established enteral nutrition. Arch Dis Child Fetal Neonatal Ed 2015; 100:F126-31. [PMID: 25381093 DOI: 10.1136/archdischild-2014-306168] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
OBJECTIVE In previous cases, we have observed occasional hypoglycaemic episodes in preterm infants after initial intensive care. In this prospective study, we determined the frequency and severity of abnormal tissue glucose (TG) in clinically stable preterm infants on full enteral nutrition. METHODS Preterm infants born at <1000 g (n=23; G1) and birth weight 1000-1500 g (n=18; G2) were studied at a postmenstrual age of 32±2 weeks (G1) and 33±2 weeks (G2). Infants were fed two or three hourly, according to a standard bolus-nutrition protocol, and continuous subcutaneous glucose measurements were performed for 72 h. Normal glucose values were assumed at ≥2.5 mmol/L (45 mg/dL) and ≤8.3 mmol/L (150 mg/dL). Frequency, severity and duration of glucose values beyond normal values were determined. RESULTS We observed asymptomatic low TG values in 39% of infants in G1 and in 44% in G2. High TG values were detected in 83% in G1 and 61% in G2. Infants in G1 experienced prolonged and more severe low TG episodes, and also more frequent and severe high TG episodes. In G1 and G2, 87% and 67% of the infants, respectively, showed glucose fluctuations characterised by rapid glucose increase followed by a rapid glucose drop after feeds. In more mature infants, glucose fluctuations were less pronounced and less dependent on enteral feeds. CONCLUSIONS Clinically stable well-developing preterm infants beyond their initial period of intensive care show interstitial glucose instabilities exceeding values as low as 2.5 mmol/L and as high as 8.3 mmol/L. This novel observation may play an important role for the susceptibility of these high-risk infants for the development of the metabolic syndrome. TRIAL REGISTRATION NUMBER German trial registration number DRKS00004590.
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Affiliation(s)
- E Mola-Schenzle
- Division of Neonatology, Dr von Hauner Children's Hospital and Perinatal Center, Ludwig Maximilian University Munich-Grosshadern, Munich, Germany
| | - A Staffler
- Division of Neonatology, Regional Hospital Bolzano, Bolzano, Italy
| | - M Klemme
- Division of Neonatology, Dr von Hauner Children's Hospital and Perinatal Center, Ludwig Maximilian University Munich-Grosshadern, Munich, Germany
| | - F Pellegrini
- Division of Neonatology, Regional Hospital Bolzano, Bolzano, Italy
| | - G Molinaro
- Division of Neonatology, Regional Hospital Bolzano, Bolzano, Italy
| | - K G Parhofer
- Department of Internal Medicine, Ludwig-Maximilian-University Munich-Grosshadern, Munich, Germany
| | - H Messner
- Division of Neonatology, Regional Hospital Bolzano, Bolzano, Italy
| | - A Schulze
- Division of Neonatology, Dr von Hauner Children's Hospital and Perinatal Center, Ludwig Maximilian University Munich-Grosshadern, Munich, Germany
| | - A W Flemmer
- Division of Neonatology, Dr von Hauner Children's Hospital and Perinatal Center, Ludwig Maximilian University Munich-Grosshadern, Munich, Germany
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Fischer K, Kühnert M, Gläser R, Schulze A. Photocatalytic degradation and toxicity evaluation of diclofenac by nanotubular titanium dioxide–PES membrane in a static and continuous setup. RSC Adv 2015. [DOI: 10.1039/c4ra16219f] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Diclofenac is a commonly used anti-inflammatory drug, which has been found in surface waters. TiO2 nanotubes with a polymer microfiltration membrane showed high photocatalytic degradation of diclofenac combined with an excellent membrane performance and long term stability.
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Affiliation(s)
- K. Fischer
- Leibniz Institute of Surface Modification
- Leipzig
- Germany
| | - M. Kühnert
- Leibniz Institute of Surface Modification
- Leipzig
- Germany
| | - R. Gläser
- Leipzig University
- Institute of Chemical Technology
- Leipzig
- Germany
| | - A. Schulze
- Leibniz Institute of Surface Modification
- Leipzig
- Germany
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Schulze A, Gärtner M, Scharf HP. [Dorsal sagittal knee joint stability after endoprosthetic knee arthroplasty : Influence of preoperative joint stability and the type of implanted prosthesis]. Orthopade 2014; 44:226-30. [PMID: 25413279 DOI: 10.1007/s00132-014-3047-y] [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] [Indexed: 11/28/2022]
Abstract
BACKGROUND Anterior knee pain is a known complication after implantation of a prosthesis and a possible reason is a posterior knee joint instability; however, the influence on postoperative stability is just as unknown as the possible influence of the type of prosthesis on postoperative stability. AIM This study investigated two possible preoperative and intraoperative influencing factors by determination of the preoperative joint stability and type of prosthesis.
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Affiliation(s)
- A Schulze
- Orthopädisch-Unfallchirurgisches Zentrum, Universitätsmedizin Mannheim, Theodor-Kutzer-Ufer 1-3, 68135, Mannheim, Deutschland,
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Schulze A, Fleskes K, Scharf HP. [What do patients in Germany expect from their total knee arthroplasty?]. Z Orthop Unfall 2014; 152:462-8. [PMID: 25313701 DOI: 10.1055/s-0034-1383022] [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] [Indexed: 10/24/2022]
Abstract
INTRODUCTION Only 84 % of patients are satisfied with the operative result after total knee arthroplasty. A relevant reason is non-fulfilled preoperative expectations. Non-fulfilled preoperative expectations cannot be influenced postoperatively. So a knowledge of preoperative expectations and their influential factors is essential. The following study analyses the expectations and influential factors in patients before total knee arthroplasty in Germany. MATERIAL AND METHODS On the day before total knee replacement in 104 patients the following data were collected: school leaving level, comorbidities, articular knee function, psychological mood, health-related quality of life, and preoperative expectations. Statistical evaluation was done by factor analyses of expectations and independent variables, and correlation and regression analyses. RESULTS The following 4 factors of expectations resulted from the factor analyses: (i) relief of pain, (ii) increase of range of motion of the knee, (iii) better mobility, and (iv) better integration in social activities. In general patient expectations on the effects of a total knee replacement are high. Age and better integration in social activities correlate negatively, as also do age and better mobility. Body mass index and better integration in social activities correlate positively. The following formula analyses the expectations of better integration in social life: social expectations = 116-0.991 × age. DISCUSSION For the first time this study determines expectations and influential factors of patients who undergo a total knee replacement in Germany. By knowing the interaction of satisfaction and preoperative expectations, this knowledge is an essential condition to increase satisfaction after total knee replacement in the German population. Collecting the preoperative expectations of patients has to be an indispensable feature of the clinical practice in orthopaedic surgery.
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Affiliation(s)
- A Schulze
- Orthopädisch-Unfallchirurgisches Zentrum, Universitätsmedizin Mannheim
| | - K Fleskes
- Orthopädisch-Unfallchirurgisches Zentrum, Universitätsmedizin Mannheim
| | - H-P Scharf
- Orthopädisch-Unfallchirurgisches Zentrum, Universitätsmedizin Mannheim
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Abstract
Hearing impairment is considered as the most common impairment of a human sense system. According to WHO, 360 Million people worldwide were affected by hearing loss in 2012, out of which 91% were adults and 9% children.Hearing impairment can be triggered by various mechanisms, such as locally destructive processes (chronic otitis media, cholesteatoma or traumatic lesions) or systemic influences like infectious or ototoxic substances (measles, mumps, meningococcal meningitis or medication and industrial agents). Congenital dysplasia, perinatal complications and genetic modifications can lead to hearing loss as well. Moreover, the acute or chronic noise exposure associated with the changing spare time activities in industrial nations represents an increasingly significant source of hearing impairment. In order to achieve the best hearing rehabilita-tion, a specific differential diagnosis in each case is of significant importance.
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Hübener C, Förster KM, Herber-Jonat S, Hasbargen U, Schmitz C, Malec E, Lehner M, Stehr M, Schulze A, Flemmer AW. Neonatale extracorporale Membranoxygenierung (ECMO) bei Lungenversagen – 5 Jahresdaten aus dem Perinatalzentrum des Klinikums Großhadern. Geburtshilfe Frauenheilkd 2014. [DOI: 10.1055/s-0034-1388036] [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: 10/24/2022] Open
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