1
|
Lippmann T, Braubach P, Ettinger M, Kuehnel M, Laenger F, Jonigk D. Fluorescence in Situ Hybridization (FISH) for the Diagnosis of Periprosthetic Joint Infection in Formalin-Fixed Paraffin-Embedded Surgical Tissues. J Bone Joint Surg Am 2019; 101:e5. [PMID: 30653049 DOI: 10.2106/jbjs.18.00243] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND As the number of arthroplasties performed increases, periprosthetic joint infection (PJI) represents a common and challenging problem. The Musculoskeletal Infection Society (MSIS) recommends diagnosing PJI according to its guidelines. The aim of the current study was to assess whether fluorescence in situ hybridization (FISH) analysis of formalin-fixed paraffin-embedded periprosthetic membranes can successfully improve the diagnosis of infection in patients with orthopaedic implants. METHODS We retrospectively analyzed 88 periprosthetic membranes of joint prostheses using FISH analysis according to a standard protocol, with a probe targeting a sequence found in most bacteria. We compared the results with routine clinical classification according to the guidelines of the MSIS, microbiological culture, and histopathological classification according to Morawietz and Krenn. We additionally performed FISH analysis using 2 species-specific probes for several culture-positive cases. RESULTS FISH successfully detected bacteria in 38 (95%) of 40 periprosthetic membranes that were rated positive by clinical classification. FISH results compared with clinical classification demonstrated a sensitivity of 95% (95% confidence interval [CI], 83.08% to 99.39%), a specificity of 85.42% (95% CI, 72.24% to 93.93%), a positive predictive value of 84.44% (95% CI, 70.55% to 93.50%), and a negative predictive value of 95.35% (95% CI, 84.19% to 99.43%). FISH results compared with histopathological classification demonstrated a sensitivity of 95.12% (95% CI, 83.47% to 99.40%), a specificity of 87.23% (95% CI, 74.26% to 95.17%), a positive predictive value of 86.67% (95% CI, 73.21% to 94.95%), and a negative predictive value of 95.35% (95% CI, 84.19% to 99.43%). We successfully detected Pseudomonas aeruginosa and Staphylococcus aureus with species-specific FISH probes in all cases that were positive for these respective bacteria by microbiological culture. CONCLUSIONS FISH-based diagnosis of PJI is feasible and can be used as an additional diagnostic criterion. FISH not only can detect bacteria in periprosthetic membranes but can also differentiate pathogens at the species level. FISH represents a fast and reliable tool for detecting PJI in periprosthetic membranes, especially in combination with clinical and histopathological classification. LEVEL OF EVIDENCE Diagnostic Level III. See Instructions for Authors for a complete description of levels of evidence.
Collapse
Affiliation(s)
- Torsten Lippmann
- Institute of Pathology (T.L., P.B., M.K., F.L., and D.J.) and Department of Orthopaedic Surgery (M.E.), Hannover Medical School (MHH), Hannover, Germany
| | - Peter Braubach
- Institute of Pathology (T.L., P.B., M.K., F.L., and D.J.) and Department of Orthopaedic Surgery (M.E.), Hannover Medical School (MHH), Hannover, Germany
| | - Max Ettinger
- Institute of Pathology (T.L., P.B., M.K., F.L., and D.J.) and Department of Orthopaedic Surgery (M.E.), Hannover Medical School (MHH), Hannover, Germany
| | - Mark Kuehnel
- Institute of Pathology (T.L., P.B., M.K., F.L., and D.J.) and Department of Orthopaedic Surgery (M.E.), Hannover Medical School (MHH), Hannover, Germany
| | - Florian Laenger
- Institute of Pathology (T.L., P.B., M.K., F.L., and D.J.) and Department of Orthopaedic Surgery (M.E.), Hannover Medical School (MHH), Hannover, Germany.,Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH), German Center for Lung Research (Deutsches Zentrum für Lungenforschung [DZL]), Hannover, Germany
| | - Danny Jonigk
- Institute of Pathology (T.L., P.B., M.K., F.L., and D.J.) and Department of Orthopaedic Surgery (M.E.), Hannover Medical School (MHH), Hannover, Germany.,Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH), German Center for Lung Research (Deutsches Zentrum für Lungenforschung [DZL]), Hannover, Germany
| |
Collapse
|
2
|
Jung F, Lippmann T, Engstler AJ, Brandt A, Jin CJ, Bergheim I. PO4-3EFFECT OF MODERATE BEER CONSUMPTION ON THE DEVELOPMENT OF NON-ALCOHOLIC FATTY LIVER DISEASE: STUDIES IN MICE. Alcohol Alcohol 2017. [DOI: 10.1093/alcalc/agx074.47] [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: 11/12/2022] Open
|
3
|
Braubach P, Lippmann T, Raoult D, Lagier JC, Anagnostopoulos I, Zender S, Länger FP, Kreipe HH, Kühnel MP, Jonigk D. Fluorescence In Situ Hybridization for Diagnosis of Whipple's Disease in Formalin-Fixed Paraffin-Embedded Tissue. Front Med (Lausanne) 2017; 4:87. [PMID: 28691008 PMCID: PMC5479881 DOI: 10.3389/fmed.2017.00087] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [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: 05/08/2017] [Accepted: 06/07/2017] [Indexed: 12/12/2022] Open
Abstract
Whipple’s disease (WD) is a rare chronic systemic infection with a wide range of clinical symptoms, routinely diagnosed in biopsies from the small intestine and other tissues by periodic acid–Schiff (PAS) diastase staining and immunohistological analysis with specific antibodies. The aim of our study was to improve the pathological diagnosis of WD. Therefore, we analyzed the potential of fluorescence in situ hybridization (FISH) for diagnosing WD, using a Tropheryma (T.) whipplei-specific probe. 19 formalin-fixed paraffin-embedded (FFPE) duodenal biopsy specimens of 12 patients with treated (6/12) and untreated (6/12) WD were retrospectively examined using PAS diastase staining, immunohistochemistry, and FISH. 20 biopsy specimens with normal intestinal mucosa, Helicobacter pylori, or mycobacterial infection, respectively, served as controls. We successfully detected T. whipplei in tissue biopsies with a sensitivity of 83% in untreated (5/6) and 40% in treated (4/10) cases of WD. In our study, we show that FISH-based diagnosis of individual vital T. whipplei in FFPE specimens is feasible and can be considered as ancillary diagnostic tool for the diagnosis of WD in FFPE material. We show that FISH not only detect active WD but also be helpful as an indicator for the efficiency of antibiotic treatment and for detection of recurrence of disease when the signal of PAS diastase and immunohistochemistry lags behind the recurrence of disease, especially if the clinical course of the patient and antimicrobial treatment is considered.
Collapse
Affiliation(s)
- Peter Braubach
- Institute of Pathology, Hannover Medical School (MHH), Hanover, Germany
| | - Torsten Lippmann
- Institute of Pathology, Hannover Medical School (MHH), Hanover, Germany
| | - Didier Raoult
- Aix Marseille University, CNRS, IRD, INSERM, AP-HM, URMITE, IHU Méditerranée Infection, Marseille, France
| | - Jean-Christophe Lagier
- Aix Marseille University, CNRS, IRD, INSERM, AP-HM, URMITE, IHU Méditerranée Infection, Marseille, France
| | | | - Steffen Zender
- Department of Gastroenterology, Hepatology, and Endocrinology, Centre for Internal Medicine, Hannover Medical School (MHH), Hanover, Germany
| | | | | | | | - Danny Jonigk
- Institute of Pathology, Hannover Medical School (MHH), Hanover, Germany
| |
Collapse
|
4
|
Neuhaus V, Schaudien D, Golovina T, Temann UA, Thompson C, Lippmann T, Bersch C, Pfennig O, Jonigk D, Braubach P, Fieguth HG, Warnecke G, Yusibov V, Sewald K, Braun A. Assessment of long-term cultivated human precision-cut lung slices as an ex vivo system for evaluation of chronic cytotoxicity and functionality. J Occup Med Toxicol 2017; 12:13. [PMID: 28559920 PMCID: PMC5446749 DOI: 10.1186/s12995-017-0158-5] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [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: 09/30/2016] [Accepted: 05/11/2017] [Indexed: 12/15/2022] Open
Abstract
Background Investigation of basic chronic inflammatory mechanisms and development of new therapeutics targeting the respiratory tract requires appropriate testing systems, including those to monitor long- persistence. Human precision-cut lung slices (PCLS) have been demonstrated to mimic the human respiratory tract and have potential of an alternative, ex-vivo system to replace or augment in-vitro testing and animal models. So far, most research on PCLS has been conducted for short cultivation periods (≤72 h), while analyses of slowly metabolized therapeutics require long-term survival of PCLS in culture. In the present study, we evaluated viability, physiology and structural integrity of PCLS cultured for up to 15 days. Methods PCLS were cultured for 15 days and various parameters were assessed at different time points. Results Structural integrity and viability of cultured PCLS remained constant for 15 days. Moreover, bronchoconstriction was inducible over the whole period of cultivation, though with decreased sensitivity (EC501d = 4 × 10−8 M vs. EC5015d = 4 × 10−6 M) and reduced maximum of initial airway area (1d = 0.5% vs. 15d = 18.7%). In contrast, even though still clearly inducible compared to medium control, LPS-induced TNF-α secretion decreased significantly from day 1 to day 15 of culture. Conclusions Overall, though long-term cultivation of PCLS need further investigation for cytokine secretion, possibly on a cellular level, PCLS are feasible for bronchoconstriction studies and toxicity assays. Electronic supplementary material The online version of this article (doi:10.1186/s12995-017-0158-5) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Vanessa Neuhaus
- Fraunhofer Institute for Toxicology and Experimental Medicine, Hannover, Germany, Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH), Member of the German Centre for Lung Research (DZL), Member of the REBIRTH Cluster of Excellence, Hanover, Germany
| | - Dirk Schaudien
- Fraunhofer Institute for Toxicology and Experimental Medicine, Hannover, Germany, Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH), Member of the German Centre for Lung Research (DZL), Member of the REBIRTH Cluster of Excellence, Hanover, Germany
| | - Tatiana Golovina
- Fraunhofer USA Center for Molecular Biotechnology, Newark, DE USA
| | | | | | - Torsten Lippmann
- Institute for Pathology, Hannover Medical School, Hanover, Germany, Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH), Member of the German Centre for Lung Research (DZL), Hanover, Germany
| | - Claus Bersch
- Klinikum Region Hannover (KRH), Institute of Pathology, Hanover, Germany
| | - Olaf Pfennig
- Klinikum Region Hannover (KRH), Institute of Pathology, Hanover, Germany
| | - Danny Jonigk
- Institute for Pathology, Hannover Medical School, Hanover, Germany, Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH), Member of the German Centre for Lung Research (DZL), Hanover, Germany
| | - Peter Braubach
- Institute for Pathology, Hannover Medical School, Hanover, Germany, Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH), Member of the German Centre for Lung Research (DZL), Hanover, Germany
| | - Hans-Gerd Fieguth
- Klinikum Region Hannover (KRH), Division of Thoracic and Vascular surgery, Hanover, Germany
| | - Gregor Warnecke
- Division of Cardiac, Thoracic, Transplantation, and Vascular Surgery, Hannover Medical School, Hanover, Germany, Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH), Member of the German Centre for Lung Research (DZL), Hanover, Germany
| | - Vidadi Yusibov
- Fraunhofer USA Center for Molecular Biotechnology, Newark, DE USA
| | - Katherina Sewald
- Fraunhofer Institute for Toxicology and Experimental Medicine, Hannover, Germany, Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH), Member of the German Centre for Lung Research (DZL), Member of the REBIRTH Cluster of Excellence, Hanover, Germany
| | - Armin Braun
- Fraunhofer Institute for Toxicology and Experimental Medicine, Hannover, Germany, Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH), Member of the German Centre for Lung Research (DZL), Member of the REBIRTH Cluster of Excellence, Hanover, Germany.,Institute of Immunology, Hannover Medical School, Hanover, Germany
| |
Collapse
|
5
|
Dommaschk A, Ding N, Tort Tarres M, Bittersohl LF, Maus R, Stolper J, Jonigk D, Braubach P, Lippmann T, Welte T, Maus UA. Nasopharyngeal colonization with Streptococcus pneumoniae triggers dendritic cell dependent antibody responses against invasive disease in mice. Eur J Immunol 2017; 47:540-551. [PMID: 28101913 DOI: 10.1002/eji.201646700] [Citation(s) in RCA: 9] [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: 08/26/2016] [Revised: 12/12/2016] [Accepted: 01/13/2017] [Indexed: 01/05/2023]
Abstract
Nasopharyngeal colonization with Streptococcus pneumoniae (Spn) is an important precondition for the development of pneumococcal pneumonia. At the same time, nasopharyngeal colonization with Spn has been shown to mount adaptive immune responses against Spn in mice and humans. Cellular responses of the nasopharyngeal compartment, including the nasal-associated lymphoid tissue, to pneumococcal colonization and their importance for developing adaptive immune responses are poorly defined. We show that nasopharyngeal colonization with S. pneumoniae led to substantial expansion of dendritic cells (DCs) both in nasopharyngeal tissue and nasal-associated lymphoid tissue of mice. Depletion of DCs achieved by either diphtheria toxin (DT) treatment of chimeric zDC+/DTR mice, or by use of FMS-like tyrosine kinase 3 ligand (Flt3L) KO mice exhibiting congenitally reduced DC pool sizes, significantly diminished antibody responses after colonization with Spn, along with impaired protective immunity against invasive pneumococcal disease. Collectively, the data show that classical DCs contribute to pneumococcal colonization induced adaptive immune responses against invasive pneumococcal disease in two different mouse models. These data may be useful for future nasopharyngeal vaccination strategies against pneumococcal diseases in humans.
Collapse
Affiliation(s)
- Anne Dommaschk
- Department of Experimental Pneumology, Hannover School of Medicine, Hannover, Germany
| | - Nadine Ding
- Department of Experimental Pneumology, Hannover School of Medicine, Hannover, Germany
| | - Meritxell Tort Tarres
- Department of Experimental Pneumology, Hannover School of Medicine, Hannover, Germany
| | - Lara F Bittersohl
- Department of Experimental Pneumology, Hannover School of Medicine, Hannover, Germany
| | - Regina Maus
- Department of Experimental Pneumology, Hannover School of Medicine, Hannover, Germany
| | - Jennifer Stolper
- Department of Experimental Pneumology, Hannover School of Medicine, Hannover, Germany
| | - Danny Jonigk
- Institute of Pathology, Hannover School of Medicine, Hannover, Germany.,German Center for Lung Research, partner site BREATH, Hannover, Germany
| | - Peter Braubach
- Institute of Pathology, Hannover School of Medicine, Hannover, Germany
| | - Torsten Lippmann
- Institute of Pathology, Hannover School of Medicine, Hannover, Germany
| | - Tobias Welte
- Clinic for Pneumology, Hannover School of Medicine, Hannover, Germany.,German Center for Lung Research, partner site BREATH, Hannover, Germany
| | - Ulrich A Maus
- Department of Experimental Pneumology, Hannover School of Medicine, Hannover, Germany.,German Center for Lung Research, partner site BREATH, Hannover, Germany
| |
Collapse
|
6
|
Zhang R, Mägel L, Jonigk D, Länger F, Lippmann T, Zardo P, Pölzing F. Biosynthetic Nanostructured Cellulose Patch for Chest Wall Reconstruction: Five-Month Follow-up in a Porcine Model. J INVEST SURG 2016; 30:297-302. [PMID: 27768401 DOI: 10.1080/08941939.2016.1244310] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
PURPOSE Ideal approaches and materials for reconstruction of large chest wall defects remain a topic of debate. We sought to explore the suitability of a reinforced nanostructured cellulose (NC) patch for chest wall reconstruction in an animal model. MATERIALS AND METHODS In four domestic pigs, a standardized 10 × 10 cm chest wall defect was created by resecting three rib segments. Subsequently the defect was reconstructed via a biosynthetic NC patch (16 × 12 cm) reinforced by polytetrafluoroethylene mesh. After 1, 2, 4, and 5 months respectively, gross examination of NC patches was performed following sacrifice of the animals. Specimens of NC patches and surrounding connective tissue underwent histological examinations after staining with Hematoxylin-eosin and Elastica van Gieson. RESULTS All animals survived their observation period without encountering major adverse events. On gross examination all NC patches were intact and well integrated into the surrounding tissue. Histological examination showed clearly demarked zones of foreign body reaction at the patch/host-tissue interface. After 5 months a slight increase in foreign body reaction, fibrous capsule formation and cellular infiltration were observed. No signs of fibroblast proliferation or neovascularization were seen within NC patches at any point. CONCLUSIONS Our findings suggest a quick healing process and good overall biocompatibility following NC patch implantation.NC might prove an efficient and suitable biomaterial for complex chest wall reconstruction.
Collapse
Affiliation(s)
- Ruoyu Zhang
- a Department of Thoracic Surgery , Center for Pneumology and Thoracic Surgery, Schillerhoehe Hospital, Teaching Hospital of the University of Tuebingen , Gerlingen , Germany
| | - Lavinia Mägel
- b Institute of Pathology, Hannover Medical School , Hannover , Germany
| | - Danny Jonigk
- b Institute of Pathology, Hannover Medical School , Hannover , Germany
| | - Florian Länger
- b Institute of Pathology, Hannover Medical School , Hannover , Germany
| | - Torsten Lippmann
- b Institute of Pathology, Hannover Medical School , Hannover , Germany
| | - Patrick Zardo
- c Department of Cardiac and Thoracic Surgery , Otto-von-Guericke University Magdeburg , Magdeburg , Germany
| | - Frank Pölzing
- d Fördergemeinschaft für innovative Medizin , Beichlingen , Germany
| |
Collapse
|
7
|
Winny M, Maegel L, Grethe L, Lippmann T, Jonigk D, Schrem H, Kaltenborn A, Klempnauer J, Poehnert D. Adhesion Prevention Efficacy of Composite Meshes Parietex ®, Proceed ® and 4DryField ® PH Covered Polypropylene Meshes in an IPOM Rat Model. Int J Med Sci 2016; 13:936-941. [PMID: 27994499 PMCID: PMC5165687 DOI: 10.7150/ijms.16215] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Accepted: 09/27/2016] [Indexed: 01/05/2023] Open
Abstract
Background: Adhesions to intraperitoneally implanted meshes (IPOM) are a common problem following hernia surgery and may cause severe complications. Recently, we showed that missing peritoneal coverage of the intestine is a decisive factor for adhesion formation and 4DryField® PH (4DF) gel significantly prevents intestine-to-mesh adhesions even with use of uncoated Ultrapro® polypropylene mesh (UPM). The present study investigates adhesion prevention capability of coated Parietex® mesh (PTM) and Proceed® mesh (PCM) in comparison to 4DF treated UPM. Methods: 20 rats were randomized into two groups. A 1.5 x 2 cm patch of PTM or PCM was attached to the abdominal wall and the cecum was depleted from peritoneum by abrasion. After seven days incidence of intestine-to-mesh adhesions was evaluated using Lauder and Hoffmann adhesion scores. Histological specimens were evaluated; statistics were performed using student's t-test. The data were compared with recently published data of 4DF treated uncoated UPM. Results: Use of PTM or PCM did not significantly diminish development of intestine-to-mesh adhesions (adhesion reduction rate PTM: 29%, p = 0.069 and PCM: 25%, p = 0.078). Histological results confirmed macroscopic finding of agglutination of intestine and abdominal wall with the mesh in between. Compared to these data, the use of UPM combined with 4DF gel reveals significantly better adhesion prevention capability (p < 0.0001) as shown in earlier studies. However, in clinical situation interindividual differences in adhesion induction mechanisms cannot be excluded by this experimental approach as healing responses towards the different materials might vary. Conclusion: This study shows that in case of impaired intestinal peritoneum coated PTM and PCM do not provide significant adhesion prevention. In contrast, use of UPM combined with 4DF gel achieved a significant reduction of adhesions. Hence, in case of injury of the visceral peritoneum, application of a polysaccharide barrier device such as 4DF gel might be considered more effective in reducing intestine-to-mesh adhesions than coated mesh devices.
Collapse
Affiliation(s)
- Markus Winny
- Department of General, Abdominal and Transplantation Surgery, Hannover Medical School, Germany
| | - Lavinia Maegel
- Institute of Pathology, Hannover Medical School, Germany
| | - Leonie Grethe
- Department of General, Abdominal and Transplantation Surgery, Hannover Medical School, Germany
| | | | - Danny Jonigk
- Institute of Pathology, Hannover Medical School, Germany
| | - Harald Schrem
- Department of General, Abdominal and Transplantation Surgery, Hannover Medical School, Germany.; Core Facility Quality Management & Health Technology Assessment in Transplantation, Integrated Research and Treatment Center-Transplantation (IFB-Tx), Hannover Medical School, Germany
| | - Alexander Kaltenborn
- Core Facility Quality Management & Health Technology Assessment in Transplantation, Integrated Research and Treatment Center-Transplantation (IFB-Tx), Hannover Medical School, Germany.; Department of Trauma and Orthopaedic Surgery, Federal Armed Forces Hospital Westerstede, Westerstede, Germany
| | - Juergen Klempnauer
- Department of General, Abdominal and Transplantation Surgery, Hannover Medical School, Germany
| | - Daniel Poehnert
- Department of General, Abdominal and Transplantation Surgery, Hannover Medical School, Germany
| |
Collapse
|
8
|
Winny M, Grethe L, Maegel L, Jonigk D, Lippmann T, Klempnauer J, Poehnert D. Impairment of the Peritoneal Surface as a Decisive Factor for Intestinal Adhesions in Intraperitoneal Onlay Mesh Surgery - Introducing a New Rat Model. Int J Med Sci 2016; 13:108-12. [PMID: 26941568 PMCID: PMC4764776 DOI: 10.7150/ijms.14056] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2015] [Accepted: 12/10/2015] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Meshes implanted intraperitoneally are known to cause adhesions potentially resulting in complications such as chronic pain, enterocutaneous fistula, or mesh infection. This study introduces a model for investigation of intestine-to-mesh adhesions and evaluates as to whether missing of visceral peritoneum is causative. METHODS In 18 rats, rectangular 1.5 x 2 cm patches of an uncoated polypropylene mesh (Ultrapro(®)) were sewn to the inner abdominal wall next to the cecum. Additionally, a meso-suture ensured contact between cecum and mesh. Rats were assigned to 2 groups: in 8 rats the peritoneum was left intact, in 10 the cecum was depleted from peritoneum with abrasion. Sacrifice was on day 7. Macroscopic evaluation used two adhesion scores. Specimens were evaluated microscopically, statistical analyses employed student's t-test. RESULTS On day 7, rats with mesh implantation combined with locally de-peritonealization by cecal abrasion mostly showed severe cecum-to-mesh agglutination (mean Lauder score 92%, mean total Hoffmann score 90%), whereas meshes of most animals without cecal abrasion only had some coverage with intraabdominal fat (33%, 24%; p = 0.0002). Histological work-up showed adequate wall ingrowth of mesh in all rats. In animals with cecal abrasion, meshes were mostly adhesive with cecal wall. However, when the peritoneum of cecum was unimpaired, abdominal wall above the mesh as well as cecum usually revealed sub-peritoneal tissue and a mono-layer cell coverage as seen in normal peritoneum. CONCLUSION This study introduces a model mimicking a clinical situation of e.g. hernia repair by intraperitoneally implanted meshes when mesh has contact with normal and with de-peritonealized intestine. The model might be useful for testing mesh types and coatings as well as other devices for their efficacy in adhesion prevention. The high adhesion scores of rats with local de-peritonealization compared with the low scores of animals with intact peritoneum indicate that the integrity of intestinal peritoneum is a decisive factor for adhesion formation.
Collapse
Affiliation(s)
- M Winny
- 1. Clinic for General, Abdominal and Transplant Surgery, Hannover Medical School, Germany
| | - L Grethe
- 1. Clinic for General, Abdominal and Transplant Surgery, Hannover Medical School, Germany
| | - L Maegel
- 2. Institute of Pathology, Hannover Medical School, Germany
| | - D Jonigk
- 2. Institute of Pathology, Hannover Medical School, Germany
| | - T Lippmann
- 2. Institute of Pathology, Hannover Medical School, Germany
| | - J Klempnauer
- 1. Clinic for General, Abdominal and Transplant Surgery, Hannover Medical School, Germany
| | - D Poehnert
- 1. Clinic for General, Abdominal and Transplant Surgery, Hannover Medical School, Germany
| |
Collapse
|
9
|
Poehnert D, Grethe L, Maegel L, Jonigk D, Lippmann T, Kaltenborn A, Schrem H, Klempnauer J, Winny M. Evaluation of the Effectiveness of Peritoneal Adhesion Prevention Devices in a Rat Model. Int J Med Sci 2016; 13:524-32. [PMID: 27429589 PMCID: PMC4946123 DOI: 10.7150/ijms.15167] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Accepted: 05/04/2016] [Indexed: 12/08/2022] Open
Abstract
BACKGROUND Abdominal operations are followed by adhesions, a prevalent cause of abdominal pain, and the most frequent cause for bowel obstruction and secondary female infertility. This rat study addresses adhesion prevention capability of Adept(®), Interceed(®), Seprafilm(®), and a novel device, 4DryField(®) PH which is provided as powder and generates its effect as gel. METHODS Sixty-eight male Lewis rats had cecal abrasion and creation of an equally sized abdominal wall defect, and were grouped randomly: A control group without treatment (n=10); two groups treated with 4DryField(®) PH using premixed gel (n=15) or in-situ gel technique (n=16); one group each was treated with Seprafilm(®) (n=8), Interceed(®) (n=9), or Adept(®) (n=10). Sacrifice was on day 7 to evaluate incidence, quality, and quantity of adhesions, as expressed via adhesion reduction rate (AR). Histologic specimens were evaluated. Statistical analyses used ANOVA and unpaired t-tests. RESULTS 4DryField(®) PH significantly reduced incidence and severity of adhesions both as premixed gel (AR: 85.2%) and as in-situ made gel (AR: 100%), a comparison between these two application techniques showed no differences in efficacy. Seprafilm(®) did not reduce incidence but severity of adhesions significantly (AR: 53.5%). With Interceed(®) (AR: 3.7%) and Adept(®) (AR: 16.1%) no significant adhesion-reduction was achieved. Except for inflammatory response with Interceed(®), histopathology showed good tissue compatibility of all other devices. CONCLUSION 4DryField(®) PH and Seprafilm(®) showed significant adhesion prevention capabilities. 4DryField(®) PH achieved the highest adhesion prevention effectiveness without restrictions concerning mode of application and compatibility and, thus, is a promising strategy to prevent abdominal adhesions.
Collapse
Affiliation(s)
- D Poehnert
- 1. Department of General, Visceral and Transplantation Surgery, Hannover Medical School, Germany
| | - L Grethe
- 1. Department of General, Visceral and Transplantation Surgery, Hannover Medical School, Germany
| | - L Maegel
- 2. Institute of Pathology, Hannover Medical School, Germany
| | - D Jonigk
- 2. Institute of Pathology, Hannover Medical School, Germany
| | - T Lippmann
- 2. Institute of Pathology, Hannover Medical School, Germany
| | - A Kaltenborn
- 3. Core Facility Quality Management and Health Technology Assessment in Transplantation, Integrated Research and Treatment Center-Transplantation (IFB-Tx), Hannover Medical School, Germany;; 4. Department of Trauma and Orthopaedic Surgery, Federal Armed Forces Hospital Westerstede, Westerstede, Germany
| | - H Schrem
- 1. Department of General, Visceral and Transplantation Surgery, Hannover Medical School, Germany;; 3. Core Facility Quality Management and Health Technology Assessment in Transplantation, Integrated Research and Treatment Center-Transplantation (IFB-Tx), Hannover Medical School, Germany
| | - J Klempnauer
- 1. Department of General, Visceral and Transplantation Surgery, Hannover Medical School, Germany
| | - M Winny
- 1. Department of General, Visceral and Transplantation Surgery, Hannover Medical School, Germany
| |
Collapse
|
10
|
Jonigk D, Izykowski N, Rische J, Braubach P, Kühnel M, Warnecke G, Lippmann T, Kreipe H, Haverich A, Welte T, Gottlieb J, Laenger F. Molecular Profiling in Lung Biopsies of Human Pulmonary Allografts to Predict Chronic Lung Allograft Dysfunction. Am J Pathol 2015; 185:3178-88. [PMID: 26476349 DOI: 10.1016/j.ajpath.2015.08.016] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2015] [Revised: 08/03/2015] [Accepted: 08/28/2015] [Indexed: 10/22/2022]
Abstract
Chronic lung allograft dysfunction (CLAD) is the main reason for poor long-term outcome of lung transplantation, with bronchiolitis obliterans (BO) representing the predominant pathological feature. BO is defined as a progressive fibrous obliteration of the small airways, thought to be triggered by a combination of nonimmune bronchial injury and alloimmune and autoimmune mechanisms. Because biopsy samples are too insensitive to reliably detect BO and a decline in lung function test results, which is clinically used to define CLAD, does not detect early stages, there is need for alternative biomarkers for early diagnosis. Herein, we analyzed the cellular composition and differential expression of 45 tissue remodeling-associated genes in transbronchial lung biopsy specimens from two cohorts with 18 patients each: patients who did not develop CLAD within 3 years after transplantation (48 biopsy specimens) and patients rapidly developing CLAD within the first 3 postoperative years (57 biopsy specimens). Integrating the mRNA expression levels of the five most significantly dysregulated genes from the transforming growth factor-β axis (BMP4, IL6, MMP1, SMAD1, and THBS1) into a score, patient groups could be confidently separated and the outcome predicted (P < 0.001). We conclude that overexpression of fibrosis-associated genes may be valuable as a tissue-based molecular biomarker to more accurately diagnose or predict the development of CLAD.
Collapse
Affiliation(s)
- Danny Jonigk
- Institute of Pathology, Hanover Medical School, Hanover, Germany; Biomedical Research in Endstage and Obstructive Lung Disease, the Hanover Division of the German Center for Lung Research, Gießen, Germany.
| | - Nicole Izykowski
- Institute of Pathology, Hanover Medical School, Hanover, Germany
| | - Johanna Rische
- Institute of Pathology, Hanover Medical School, Hanover, Germany
| | - Peter Braubach
- Institute of Pathology, Hanover Medical School, Hanover, Germany
| | - Mark Kühnel
- Institute of Functional and Applied Anatomy, Hanover Medical School, Hanover, Germany
| | - Gregor Warnecke
- Biomedical Research in Endstage and Obstructive Lung Disease, the Hanover Division of the German Center for Lung Research, Gießen, Germany; Department of Thoracic Surgery, Hanover Medical School, Hanover, Germany
| | - Torsten Lippmann
- Institute of Pathology, Hanover Medical School, Hanover, Germany
| | - Hans Kreipe
- Institute of Pathology, Hanover Medical School, Hanover, Germany
| | - Axel Haverich
- Biomedical Research in Endstage and Obstructive Lung Disease, the Hanover Division of the German Center for Lung Research, Gießen, Germany; Department of Thoracic Surgery, Hanover Medical School, Hanover, Germany
| | - Tobias Welte
- Biomedical Research in Endstage and Obstructive Lung Disease, the Hanover Division of the German Center for Lung Research, Gießen, Germany; Department of Respiratory Medicine, Hanover Medical School, Hanover, Germany
| | - Jens Gottlieb
- Biomedical Research in Endstage and Obstructive Lung Disease, the Hanover Division of the German Center for Lung Research, Gießen, Germany; Department of Respiratory Medicine, Hanover Medical School, Hanover, Germany
| | - Florian Laenger
- Institute of Pathology, Hanover Medical School, Hanover, Germany; Biomedical Research in Endstage and Obstructive Lung Disease, the Hanover Division of the German Center for Lung Research, Gießen, Germany
| |
Collapse
|
11
|
Stammler A, Hau T, Bhushan S, Meinhardt A, Jonigk D, Lippmann T, Pilatz A, Schneider-Hüther I, Middendorff R. Epididymitis: ascending infection restricted by segmental boundaries. Hum Reprod 2015; 30:1557-65. [DOI: 10.1093/humrep/dev112] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2015] [Accepted: 04/24/2015] [Indexed: 12/29/2022] Open
|
12
|
Gibbs GV, Downs RT, Cox DF, Rosso KM, Ross NL, Kirfel A, Lippmann T, Morgenroth W, Crawford TD. Experimental bond critical point and local energy density properties determined for Mn-O, Fe-O, and Co-O bonded interactions for tephroite, Mn2SiO4, fayalite, Fe2SiO4, and Co2SiO4 olivine and selected organic metal complexes: comparison with properties calculated for non-transition and transition metal M-O bonded interactions for silicates and oxides. J Phys Chem A 2008; 112:8811-23. [PMID: 18714960 DOI: 10.1021/jp804280j] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Bond critical point (bcp) and local energy density properties for the electron density (ED) distributions, calculated with first-principle quantum mechanical methods for divalent transition metal Mn-, Co-, and Fe-containing silicates and oxides are compared with experimental model ED properties for tephroite, Mn 2SiO 4, fayalite, Fe 2SiO 4, and Co 2SiO 4 olivine, each determined with high-energy synchrotron single-crystal X-ray diffraction data. Trends between the experimental bond lengths, R(M-O), (M = Mn, Fe, Co), and the calculated bcp properties are comparable with those observed for non-transition M-O bonded interactions. The bcp properties, local total energy density, H( r c), and bond length trends determined for the Mn-O, Co-O, and Fe-O interactions are also comparable. A comparison is also made with model experimental bcp properties determined for several Mn-O, Fe-O, and Co-O bonded interactions for selected organometallic complexes and several oxides. Despite the complexities of the structures of the organometallic complexes, the agreement between the calculated and model experimental bcp properties is fair to good in several cases. The G( r c)/rho( r c) versus R(M-O) trends established for non-transition metal M-O bonded interactions hold for the transition metal M-O bonded interactions with G( r c)/rho( r c) increasing in value as H( r c) becomes progressively more negative in value, indicating an increasing shared character of the interaction as G( r c)/rho( r c) increases in value. As observed for the non-transition metal M-O bonded interactions, the Laplacian, nabla (2)rho( r c), increases in value as rho( r c) increases and as H( r c) decreases and becomes progressive more negative in value. The Mn-O, Fe-O, and Co-O bonded interactions are indicated to be of intermediate character with a substantial component of closed-shell character compared with Fe-S and Ni-S bonded interactions, which show greater shared character based on the | V( r c)|/ G( r c) bond character indicator. The atomic charges conferred on the transition metal atoms for the three olivines decrease with increasing atomic number from Mn to Fe to Co as the average M-O bond lengths decrease from 2.219 to 2.168 to 2.128 A, respectively.
Collapse
Affiliation(s)
- G. V. Gibbs
- Departments of Geosciences, Chemical Engineering, and Chemistry, Virginia Tech, Blacksburg, Virginia 24061; Department of Geosciences, University of Arizona, Tucson, Arizona 85721; Chemical and Materials Sciences Division and the W. R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352; Mineralogisch-Petrologisches Institut, Universität Bonn, Poppelsdorfer Schloss, D-53115 Bonn, Germany; GKSS, Max-Planck-Strasse, D-21502 Geesthacht,
| | - R. T. Downs
- Departments of Geosciences, Chemical Engineering, and Chemistry, Virginia Tech, Blacksburg, Virginia 24061; Department of Geosciences, University of Arizona, Tucson, Arizona 85721; Chemical and Materials Sciences Division and the W. R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352; Mineralogisch-Petrologisches Institut, Universität Bonn, Poppelsdorfer Schloss, D-53115 Bonn, Germany; GKSS, Max-Planck-Strasse, D-21502 Geesthacht,
| | - D. F. Cox
- Departments of Geosciences, Chemical Engineering, and Chemistry, Virginia Tech, Blacksburg, Virginia 24061; Department of Geosciences, University of Arizona, Tucson, Arizona 85721; Chemical and Materials Sciences Division and the W. R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352; Mineralogisch-Petrologisches Institut, Universität Bonn, Poppelsdorfer Schloss, D-53115 Bonn, Germany; GKSS, Max-Planck-Strasse, D-21502 Geesthacht,
| | - K. M. Rosso
- Departments of Geosciences, Chemical Engineering, and Chemistry, Virginia Tech, Blacksburg, Virginia 24061; Department of Geosciences, University of Arizona, Tucson, Arizona 85721; Chemical and Materials Sciences Division and the W. R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352; Mineralogisch-Petrologisches Institut, Universität Bonn, Poppelsdorfer Schloss, D-53115 Bonn, Germany; GKSS, Max-Planck-Strasse, D-21502 Geesthacht,
| | - N. L. Ross
- Departments of Geosciences, Chemical Engineering, and Chemistry, Virginia Tech, Blacksburg, Virginia 24061; Department of Geosciences, University of Arizona, Tucson, Arizona 85721; Chemical and Materials Sciences Division and the W. R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352; Mineralogisch-Petrologisches Institut, Universität Bonn, Poppelsdorfer Schloss, D-53115 Bonn, Germany; GKSS, Max-Planck-Strasse, D-21502 Geesthacht,
| | - A. Kirfel
- Departments of Geosciences, Chemical Engineering, and Chemistry, Virginia Tech, Blacksburg, Virginia 24061; Department of Geosciences, University of Arizona, Tucson, Arizona 85721; Chemical and Materials Sciences Division and the W. R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352; Mineralogisch-Petrologisches Institut, Universität Bonn, Poppelsdorfer Schloss, D-53115 Bonn, Germany; GKSS, Max-Planck-Strasse, D-21502 Geesthacht,
| | - T. Lippmann
- Departments of Geosciences, Chemical Engineering, and Chemistry, Virginia Tech, Blacksburg, Virginia 24061; Department of Geosciences, University of Arizona, Tucson, Arizona 85721; Chemical and Materials Sciences Division and the W. R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352; Mineralogisch-Petrologisches Institut, Universität Bonn, Poppelsdorfer Schloss, D-53115 Bonn, Germany; GKSS, Max-Planck-Strasse, D-21502 Geesthacht,
| | - W. Morgenroth
- Departments of Geosciences, Chemical Engineering, and Chemistry, Virginia Tech, Blacksburg, Virginia 24061; Department of Geosciences, University of Arizona, Tucson, Arizona 85721; Chemical and Materials Sciences Division and the W. R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352; Mineralogisch-Petrologisches Institut, Universität Bonn, Poppelsdorfer Schloss, D-53115 Bonn, Germany; GKSS, Max-Planck-Strasse, D-21502 Geesthacht,
| | - T. D. Crawford
- Departments of Geosciences, Chemical Engineering, and Chemistry, Virginia Tech, Blacksburg, Virginia 24061; Department of Geosciences, University of Arizona, Tucson, Arizona 85721; Chemical and Materials Sciences Division and the W. R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352; Mineralogisch-Petrologisches Institut, Universität Bonn, Poppelsdorfer Schloss, D-53115 Bonn, Germany; GKSS, Max-Planck-Strasse, D-21502 Geesthacht,
| |
Collapse
|
13
|
Martins RV, Schell N, Lippmann T, Beckmann F, Ruhnau HU, Kiehn R, Schreyer A. The status of GKSS′ high energy materials science beamline at Petra III. Acta Crystallogr A 2007. [DOI: 10.1107/s0108767307094445] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
14
|
Lippmann T, Beckmann F, Martins RV, Lottermoser L, Dose T, Schreyer A. The new materials science synchrotron beamline HARWI II. Acta Crystallogr A 2007. [DOI: 10.1107/s0108767307094457] [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: 11/10/2022] Open
|
15
|
Lippmann T. High-energy synchrotron radiation for charge density and materials science experiments. Acta Crystallogr A 2005. [DOI: 10.1107/s0108767305097254] [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: 11/11/2022] Open
|
16
|
Kirfel AH, Lippmann T. Electron density distribution in forsterite, Mg 2SiO 4: a redetermination. Acta Crystallogr A 2002. [DOI: 10.1107/s0108767302091638] [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: 11/10/2022] Open
|
17
|
Beckmann F, Lippmann T, Bonse U. Absorption- and phase-contrast microtomography at HASYLAB/DESY. Acta Crystallogr A 2002. [DOI: 10.1107/s0108767302087160] [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: 11/10/2022] Open
|
18
|
Kirfel A, Krane HG, Blaha P, Schwarz K, Lippmann T. Electron-density distribution in stishovite, SiO2: a new high-energy synchrotron-radiation study. Acta Crystallogr A 2001; 57:663-77. [PMID: 11679696 DOI: 10.1107/s0108767301010698] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2001] [Accepted: 06/27/2001] [Indexed: 11/10/2022] Open
Abstract
The electron-density distribution of the high-pressure polymorph of SiO2, stishovite [a = 4.177 (1), c = 2.6655 (5) A, space group P4(2)/mnm, Z = 2], has been redetermined by single-crystal diffractometry using synchrotron radiation of 100.42 and 30.99 keV, respectively, in order to obtain essentially absorption- and extinction-free data. Room-temperature diffraction experiments on two samples of irregular shape were carried out on two different diffractometers installed at HASYLAB/DESY, Hamburg, Germany. The structure refinement on the high-energy data converged at R(F) = 0.0047, wR(F) = 0.0038, GoF = 0.78, for a multipole model with neutral atoms and multipole expansions up to seventh order. For each atom, the radial expansion coefficients of the multipole orders (l > 0) were constrained to a common value. The absence of extinction was indicated by a refined correction parameter equalling zero within error limit. The excellent quality of the data is also illustrated by a high-order (HO) refinement (s > 0.7 A(-1)) yielding R(F) = 0.0060, wR(F) = 0.0048, GoF = 0.85. Both static deformation electron-density distribution and structure amplitudes compare well with corresponding results obtained from band-structure calculations using the linearized-augmented-plane-wave (LAPW) method. Ensuing topological analysis of the total model electron density distribution revealed bond critical point properties for the two unique Si--O bonds, indicating a predominantly closed-shell interaction mixed with a significant shared interaction contribution that decreases with increasing interatomic distance. Calculation of atomic basins yielded charges of +3.39 e and -1.69 e for Si and O, respectively, in good agreement with the theoretically calculated values of +3.30 e and -1.65 e. The volumina of the Si and O basins are 2.32 and 10.48 A3, corresponding to spheres with radii of 0.82 and 1.36 A, respectively. The results also conform well with correlations between bond length and bond critical point properties reported in the literature for geometry-optimized hydroxyacid molecules. Estimates of the Si cation electronegativity indicate that the change of Si coordination by oxygen from 4 to 6 is accompanied by an increase of the ionicity of the Si--O bond of about 7%.
Collapse
Affiliation(s)
- A Kirfel
- Mineralogisch-Petrologisches Institut, Universität Bonn, Poppelsdorfer Schloss, D-53115 Bonn, Germany.
| | | | | | | | | |
Collapse
|
19
|
Abstract
The local point symmetry of the short-range order in simple monatomic liquids remains a fundamental open question in condensed-matter science. For more than 40 years it has been conjectured that liquids with centrosymmetric interactions may be composed of icosahedral building blocks. But these proposed mobile, randomly orientated structures have remained experimentally inaccessible owing to the unavoidable averaging involved in scattering experiments, which can therefore determine only the isotropic radial distribution function. Here we overcome this limitation by capturing liquid fragments at a solid-liquid interface, and observing the scattering of totally internally reflected (evanescent) X-rays, which are sensitive only to the liquid structure at the interface. Using this method, we observe five-fold local symmetry in liquid lead adjacent to a silicon wall, and obtain an experimental portrait of the icosahedral fragments that are predicted to occur in all close-packed monatomic liquids. By shedding new light on local bond order in disordered structures such as liquids and glasses, these results should lead to a better microscopic understanding of melting, freezing and supercooling.
Collapse
Affiliation(s)
- H Reichert
- Max-Planck-Institut für Metallforschung, Stuttgart, Germany.
| | | | | | | | | | | | | |
Collapse
|
20
|
|
21
|
Bouchard R, Hupfeld D, Lippmann T, Neuefeind J, Neumann HB, Poulsen HF, Rütt U, Schmidt T, Schneider JR, Süssenbach J, von Zimmermann M. A triple-crystal diffractometer for high-energy synchrotron radiation at the HASYLAB high-field wiggler beamline BW5. J Synchrotron Radiat 1998; 5:90-101. [PMID: 16687809 DOI: 10.1107/s090904959701457x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
The triple-crystal diffractometer installed at HASYLAB beamline BW5 with a high-field wiggler of critical energy 27 keV for DORIS III, operated at 4.5 GeV electron energy, is described. Samples can be mounted in large cryostats or furnaces normally used in neutron scattering experiments. The instrument has been successfully applied to measure structure factors S(Q) in liquids and amorphous materials, to collect full data sets of highly accurate structure factors for charge-density work, to measure the spin component of the ground-state magnetization in transition-metal and rare-earth compounds, to study the diffuse scattering from stacking faults and dislocation loops in Si single crystals, and for the investigation of various aspects of structural phase transitions: critical scattering in SrTiO3, oxygen order and stripe order in high-To materials. A crossed-beam technique allows for local studies of texture, internal strain and phase changes in the bulk of materials.
Collapse
Affiliation(s)
- R Bouchard
- Hamburger Synchrotronstrahlungslabor HASYLAB at Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, D-22603 Hamburg, Germany
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
22
|
Lippmann T, Fischer K, Kirfel A. Polarized X-ray absorption. Evidence of orientational dispersion in hornblende minerals. J Appl Crystallogr 1998. [DOI: 10.1107/s0021889897008790] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
|
23
|
Kirfel A, Lippmann T. Anisotropy of anomalous scattering: new experimental evidence. Acta Crystallogr A 1996. [DOI: 10.1107/s0108767396079585] [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: 11/10/2022] Open
|
24
|
Lippmann T, Kirfel A, Fischer K. Anisotropy of anomalous scattering: investigation of polarized absorption by fluorescence measurements. Acta Crystallogr A 1996. [DOI: 10.1107/s0108767396079561] [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: 11/10/2022] Open
|
25
|
|