1
|
Nonhoff J, Jafari R, Tronnier M. Malad durch Folat - Anaphylaxie nach Folsäure-Substitution. J Dtsch Dermatol Ges 2023; 21 Suppl 2:13-14. [PMID: 37099008 DOI: 10.1111/ddg.15096_g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/27/2023]
Affiliation(s)
- Justus Nonhoff
- Klinik für Dermatologie, Venerologie und Allergologie, Helios Klinikum Hildesheim
| | - Rana Jafari
- Klinik für Dermatologie, Venerologie und Allergologie, Helios Klinikum Hildesheim
| | - Michael Tronnier
- Klinik für Dermatologie, Venerologie und Allergologie, Helios Klinikum Hildesheim
| |
Collapse
|
2
|
Nonhoff J, Ottmann K, Tronnier M. Rowell-Syndrom bei subakut-kutanem Lupus erythematodes. Aktuelle Dermatologie 2021. [DOI: 10.1055/a-1341-4447] [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: 10/21/2022]
Abstract
ZusammenfassungWir berichten über einen 77-jährigen Patienten mit akut aufgetretenen, kokardenartig anmutenden Hautveränderungen bei vorbekanntem subakut-kutanem Lupus erythematodes.Aufgrund der Befundkonstellation mit fein-gesprenkelten antinukleären Antikörpern, Antikörpern gegen Ro/SSA und La/SSB und einem positiven Rheumafaktor wurde in Zusammenschau mit der Histologie die Diagnose eines Rowell-Syndroms gestellt. Das Rowell-Syndrom beschreibt das Auftreten Erythema-exsudativum-multiforme-artiger Hautveränderungen bei Patienten mit vorbekanntem Lupus erythematodes.Die diagnostischen Herausforderungen bei der Diagnosestellung des Rowell-Syndroms in Abgrenzung zur Koinzidenz von Lupus erythematodes mit einem Erythema exsudativum multiforme werden anhand einer weiteren Fallbeschreibung einer 44-jährigen Patientin mit vorbekanntem subakut-kutanem Lupus erythematodes veranschaulicht.
Collapse
Affiliation(s)
- J. Nonhoff
- Klinik für Dermatologie, Venerologie und Allergologie, Helios Klinikum Hildesheim
| | - K. Ottmann
- Klinik für Dermatologie, Venerologie und Allergologie, Helios Klinikum Hildesheim
| | - M. Tronnier
- Klinik für Dermatologie, Venerologie und Allergologie, Helios Klinikum Hildesheim
| |
Collapse
|
3
|
Ricke-Hoch M, Hoes MF, Pfeffer TJ, Schlothauer S, Nonhoff J, Haidari S, Bomer N, Scherr M, Stapel B, Stelling E, Kiyan Y, Falk C, Haghikia A, Binah O, Arany Z, Thum T, Bauersachs J, van der Meer P, Hilfiker-Kleiner D. In peripartum cardiomyopathy plasminogen activator inhibitor-1 is a potential new biomarker with controversial roles. Cardiovasc Res 2019; 116:1875-1886. [DOI: 10.1093/cvr/cvz300] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [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] [Received: 08/15/2019] [Revised: 10/11/2019] [Accepted: 11/07/2019] [Indexed: 12/17/2022] Open
Abstract
Abstract
Aims
Peripartum cardiomyopathy (PPCM) is a life-threatening heart disease occurring in previously heart-healthy women. A common pathomechanism in PPCM involves the angiostatic 16 kDa-prolactin (16 kDa-PRL) fragment, which via NF-κB-mediated up-regulation of microRNA-(miR)-146a induces vascular damage and heart failure. We analyse whether the plasminogen activator inhibitor-1 (PAI-1) is involved in the pathophysiology of PPCM.
Methods and results
In healthy age-matched postpartum women (PP-Ctrl, n = 53, left ventricular ejection fraction, LVEF > 55%), PAI-1 plasma levels were within the normal range (21 ± 10 ng/mL), but significantly elevated (64 ± 38 ng/mL, P < 0.01) in postpartum PPCM patients at baseline (BL, n = 64, mean LVEF: 23 ± 8%). At 6-month follow-up (n = 23), PAI-1 levels decreased (36 ± 14 ng/mL, P < 0.01 vs. BL) and LVEF (49 ± 11%) improved. Increased N-terminal pro-brain natriuretic peptide and Troponin T did not correlate with PAI-1. C-reactive protein, interleukin (IL)-6 and IL-1β did not differ between PPCM patients and PP-Ctrl. MiR-146a was 3.6-fold (P < 0.001) higher in BL-PPCM plasma compared with PP-Ctrl and correlated positively with PAI-1. In BL-PPCM serum, 16 kDa-PRL coprecipitated with PAI-1, which was associated with higher (P < 0.05) uPAR-mediated NF-κB activation in endothelial cells compared with PP-Ctrl serum. Cardiac biopsies and dermal fibroblasts from PPCM patients displayed higher PAI-1 mRNA levels (P < 0.05) than healthy controls. In PPCM mice (due to a cardiomyocyte-specific-knockout for STAT3, CKO), cardiac PAI-1 expression was higher than in postpartum wild-type controls, whereas a systemic PAI-1-knockout in CKO mice accelerated peripartum cardiac fibrosis, inflammation, heart failure, and mortality.
Conclusion
In PPCM patients, circulating and cardiac PAI-1 expression are up-regulated. While circulating PAI-1 may add 16 kDa-PRL to induce vascular impairment via the uPAR/NF-κB/miR-146a pathway, experimental data suggest that cardiac PAI-1 expression seems to protect the PPCM heart from fibrosis. Thus, measuring circulating PAI-1 and miR-146a, together with an uPAR/NF-κB-activity assay could be developed into a specific diagnostic marker assay for PPCM, but unrestricted reduction of PAI-1 for therapy may not be advised.
Collapse
Affiliation(s)
- Melanie Ricke-Hoch
- Department of Cardiology and Angiology, Hannover Medical School, Carl-Neuberg Str. 1, 30625 Hannover, Germany
| | - Martijn F Hoes
- Department of Cardiology, AB31, University Medical Center Groningen, Hanzeplein 1, 9713 GZ Groningen, The Netherlands
| | - Tobias J Pfeffer
- Department of Cardiology and Angiology, Hannover Medical School, Carl-Neuberg Str. 1, 30625 Hannover, Germany
| | - Stella Schlothauer
- Department of Cardiology and Angiology, Hannover Medical School, Carl-Neuberg Str. 1, 30625 Hannover, Germany
| | - Justus Nonhoff
- Department of Cardiology and Angiology, Hannover Medical School, Carl-Neuberg Str. 1, 30625 Hannover, Germany
| | - Susanna Haidari
- Department of Cardiology and Angiology, Hannover Medical School, Carl-Neuberg Str. 1, 30625 Hannover, Germany
| | - Nils Bomer
- Department of Cardiology, AB31, University Medical Center Groningen, Hanzeplein 1, 9713 GZ Groningen, The Netherlands
| | - Michaela Scherr
- Department of Hematology, Hemostasis, Oncology and Stem Cell Transplantation, Hannover Medical School, Hannover, Germany
| | - Britta Stapel
- Department of Cardiology and Angiology, Hannover Medical School, Carl-Neuberg Str. 1, 30625 Hannover, Germany
| | - Elisabeth Stelling
- Department of Cardiology and Angiology, Hannover Medical School, Carl-Neuberg Str. 1, 30625 Hannover, Germany
| | - Yulia Kiyan
- Nephrology Department, Hannover Medical School, Hannover, Germany
| | - Christine Falk
- Institute of Transplant Immunology, IFB-Tx, Hannover Medical School, Hannover, Germany
| | - Arash Haghikia
- Department of Cardiology and Angiology, Hannover Medical School, Carl-Neuberg Str. 1, 30625 Hannover, Germany
- Department of Cardiology, Charité Universitätsmedizin Berlin, Campus Benjamin Franklin, Berlin, Germany
| | - Ofer Binah
- Department of Physiology, Ruth & Bruce Rappaport Faculty of Medicine, Technion—Israel Institute of Technology, Haifa, Israel
| | - Zolt Arany
- Cardiovascular Institute and Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Thomas Thum
- Department of Molecular und Translational Therapy strategies (IMTTS), Hannover Medical School, Hannover, Germany
| | - Johann Bauersachs
- Department of Cardiology and Angiology, Hannover Medical School, Carl-Neuberg Str. 1, 30625 Hannover, Germany
| | - Peter van der Meer
- Department of Cardiology, AB31, University Medical Center Groningen, Hanzeplein 1, 9713 GZ Groningen, The Netherlands
| | - Denise Hilfiker-Kleiner
- Department of Cardiology and Angiology, Hannover Medical School, Carl-Neuberg Str. 1, 30625 Hannover, Germany
| |
Collapse
|
4
|
Nonhoff J, Ricke-Hoch M, Mueller M, Stapel B, Pfeffer T, Kasten M, Scherr M, von Kaisenberg C, Bauersachs J, Haghikia A, Hilfiker-Kleiner D. Serelaxin treatment promotes adaptive hypertrophy but does not prevent heart failure in experimental peripartum cardiomyopathy. Cardiovasc Res 2017; 113:598-608. [PMID: 28453725 PMCID: PMC5412020 DOI: 10.1093/cvr/cvw245] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Revised: 10/03/2016] [Accepted: 12/01/2016] [Indexed: 01/20/2023] Open
Abstract
AIMS Peripartum cardiomyopathy (PPCM) is a systolic left ventricular dysfunction developing in the peripartum phase in previously healthy women. Relaxin-2 is a pregnancy hormone with potential beneficial effects in heart failure patients. We evaluated Relaxin-2 as a potential diagnostic marker and/or a therapeutic agent in PPCM. METHODS AND RESULTS In healthy peripartum women, serum Relaxin-2 levels (measured by ELISA in the second half of pregnancy) were elevated showing a decreasing trend in the first postpartum week and returned to non-pregnant levels thereafter. In PPCM patients diagnosed in the first postpartum week, serum Relaxin-2 levels were lower compared to healthy postpartum stage-matched controls. In PPCM patients diagnosed later (0.5-10 months postpartum) Relaxin-2 levels were in the range of non-pregnant controls and not different from healthy postpartum stage-matched controls. In mice, serum Relaxin-1 (functional equivalent of human Relaxin-2) was increased late in pregnancy and rapidly cleared in the first postpartum week. In mice with PPCM due to a cardiomyocyte-specific knockout of STAT3 (CKO) neither low nor high dose of recombinant Relaxin-2 (serelaxin, sRlx-LD: 30 µg/kg/day; sRlx-HD: 300 µg/kg/day) affected cardiac fibrosis, inflammation and heart failure but sRlx-HD increased capillary/cardiomyocyte ratio. sRlx-HD significantly increased heart/body weight ratio and cardiomyocyte cross-sectional area in postpartum CKO and wild-type mice without changing the foetal gene expression program (ANP or β-MHC). sRlx-HD augmented plasma Prolactin levels in both genotypes, which induced cardiac activation of STAT5. In vitro analyses showed that Prolactin induces cardiomyocyte hypertrophy via activation of STAT5. CONCLUSION Although Relaxin-2 levels seemed lower in PPCM patients diagnosed early postpartum, we observed a high pregnancy-related variance of serum Relaxin-2 levels peripartum making it unsuitable as a biomarker for this condition. Supplementation with sRlx may contribute to angiogenesis and compensatory hypertrophy in the diseased heart, but the effects are not sufficient to prevent heart failure in an experimental PPCM model.
Collapse
Affiliation(s)
- Justus Nonhoff
- Department of Cardiology and Angiology, Hannover Medical School, Carl-Neuberg Str. 1, 30625 Hannover, Germany
| | - Melanie Ricke-Hoch
- Department of Cardiology and Angiology, Hannover Medical School, Carl-Neuberg Str. 1, 30625 Hannover, Germany
| | - Mirco Mueller
- Department of Cardiology and Angiology, Hannover Medical School, Carl-Neuberg Str. 1, 30625 Hannover, Germany
| | - Britta Stapel
- Department of Cardiology and Angiology, Hannover Medical School, Carl-Neuberg Str. 1, 30625 Hannover, Germany
| | - Tobias Pfeffer
- Department of Cardiology and Angiology, Hannover Medical School, Carl-Neuberg Str. 1, 30625 Hannover, Germany
| | - Martina Kasten
- Department of Cardiology and Angiology, Hannover Medical School, Carl-Neuberg Str. 1, 30625 Hannover, Germany
| | - Michaela Scherr
- Department of Hematology, Hemostasis, Oncology and Stem Cell Transplantation, Hannover Medical School, Carl-Neuberg Str. 1, 30625 Hannover, Germany
| | - Constantin von Kaisenberg
- Department of Obstetrics and Gynecology, Hannover Medical School, Carl-Neuberg Str. 1, 30625 Hannover, Germany
| | - Johann Bauersachs
- Department of Cardiology and Angiology, Hannover Medical School, Carl-Neuberg Str. 1, 30625 Hannover, Germany
| | - Arash Haghikia
- Department of Cardiology and Angiology, Hannover Medical School, Carl-Neuberg Str. 1, 30625 Hannover, Germany
| | - Denise Hilfiker-Kleiner
- Department of Cardiology and Angiology, Hannover Medical School, Carl-Neuberg Str. 1, 30625 Hannover, Germany
| |
Collapse
|
5
|
Hilfiker-Kleiner D, Haghikia A, Masuko D, Nonhoff J, Held D, Libhaber E, Petrie MC, Walker NL, Podewski E, Berliner D, Bauersachs J, Sliwa K. Outcome of subsequent pregnancies in patients with a history of peripartum cardiomyopathy. Eur J Heart Fail 2017; 19:1723-1728. [DOI: 10.1002/ejhf.808] [Citation(s) in RCA: 75] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Revised: 02/06/2017] [Accepted: 02/06/2017] [Indexed: 12/28/2022] Open
Affiliation(s)
| | - Arash Haghikia
- Department of Cardiology and Angiology; Medical School Hannover; Germany
| | - David Masuko
- Hatter Institute for Cardiovascular Research in Africa, Department of Medicine, Faculty of Health Sciences; University of Cape Town; South Africa
| | - Justus Nonhoff
- Department of Cardiology and Angiology; Medical School Hannover; Germany
| | - Dominik Held
- Department of Cardiology and Angiology; Medical School Hannover; Germany
| | - Elena Libhaber
- School of Clinical Medicine; University of the Witwatersrand; Johannesburg South Africa
| | - Mark C. Petrie
- University of Glasgow and West of Scotland Heart and Lung Centre, Golden Jubilee National Hospital; Glasgow Scotland
| | - Niki L. Walker
- University of Glasgow and West of Scotland Heart and Lung Centre, Golden Jubilee National Hospital; Glasgow Scotland
| | - Edith Podewski
- Department of Cardiology and Angiology; Medical School Hannover; Germany
| | - Dominik Berliner
- Department of Cardiology and Angiology; Medical School Hannover; Germany
| | - Johann Bauersachs
- Department of Cardiology and Angiology; Medical School Hannover; Germany
| | - Karen Sliwa
- Hatter Institute for Cardiovascular Research in Africa, Department of Medicine, Faculty of Health Sciences; University of Cape Town; South Africa
- School of Clinical Medicine; University of the Witwatersrand; Johannesburg South Africa
| |
Collapse
|
6
|
Nonhoff J, Moest T, Schmitt CM, Weisel T, Bauer S, Schlegel KA. Establishment of a new pull-out strength testing method to quantify early osseointegration-An experimental pilot study. J Craniomaxillofac Surg 2015; 43:1966-73. [PMID: 26616405 DOI: 10.1016/j.jcms.2015.10.005] [Citation(s) in RCA: 7] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2015] [Revised: 08/27/2015] [Accepted: 10/05/2015] [Indexed: 11/25/2022] Open
Abstract
OBJECTIVES The animal study aims to evaluate a new experimental model for measuring sole the influence of the surface characteristics independent from implant macro-design on the level of osseointegration by registering the pull-out strength needed for removal of experimental devices with different surfaces from artificial defects. MATERIAL AND METHODS Seventy-two test bodies (36 with the FRIADENT(®) plus surface, 36 with the P15/HAp biofunctionalized surface) were inserted in six adult domestic pigs with artificial calvarial defects. The experimental devices were designed to fit in the defects leaving a gap between the test body and the local bone. After 21 days of healing, the animals were sacrificed and the test bodies were pulled out with a standardised reproducible pull-out device measuring the pull-out strength. The pull-out strength for both groups was compared. RESULTS Twenty-one days after insertion a mean force of 412 ± 142 N for the P15/HAp group and 183 ± 105 N for the FRIADENT(®) plus group was measured for the removal of the specimens from the calvarial bone. The difference between the groups was statistically significant (p < 0.0001). CONCLUSION The experimental set-up seems to be a suitable method when measuring the impact of implant surfaces on the early stage of osseointegration.
Collapse
Affiliation(s)
- J Nonhoff
- DENTSPLY Implants Manufacturing GmbH, Mannheim, Germany
| | - T Moest
- Department of Oral and Maxillofacial Surgery, University of Erlangen, Nuremberg, Erlangen, Germany.
| | - Christian Martin Schmitt
- Department of Oral and Maxillofacial Surgery, University of Erlangen, Nuremberg, Erlangen, Germany
| | - T Weisel
- DENTSPLY Implants Manufacturing GmbH, Mannheim, Germany
| | - S Bauer
- DENTSPLY Implants Manufacturing GmbH, Mannheim, Germany
| | - K A Schlegel
- Department of Oral and Maxillofacial Surgery, University of Erlangen, Nuremberg, Erlangen, Germany
| |
Collapse
|
7
|
Hilfiker-Kleiner D, Haghikia A, Nonhoff J, Bauersachs J. Peripartum cardiomyopathy: current management and future perspectives. Eur Heart J 2015; 36:1090-7. [PMID: 25636745 PMCID: PMC4422973 DOI: 10.1093/eurheartj/ehv009] [Citation(s) in RCA: 153] [Impact Index Per Article: 17.0] [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: 10/28/2014] [Accepted: 01/08/2015] [Indexed: 01/06/2023] Open
Abstract
Pregnancy is associated with marked physiological changes challenging the cardiovascular system. Among the more severe pregnancy associated cardiovascular complications, peripartum cardiomyopathy (PPCM) is a potentially life-threatening heart disease emerging towards the end of pregnancy or in the first postpartal months in previously healthy women. A major challenge is to distinguish the peripartum discomforts in healthy women (fatigue, shortness of breath, and oedema) from the pathological symptoms of PPCM. Moreover, pregnancy-related pathologies such as preeclampsia, myocarditis, or underlying genetic disease show overlapping symptoms with PPCM. Difficulties in diagnosis and the discrimination from other pathological conditions in pregnancy may explain why PPCM is still underestimated. Additionally, underlying pathophysiologies are poorly understood, biomarkers are scarce and treatment options in general limited. Experience in long-term prognosis and management including subsequent pregnancies is just beginning to emerge. This review focuses on novel aspects of physiological and pathophysiological changes of the maternal cardiovascular system by comparing normal conditions, hypertensive complications, genetic aspects, and infectious disease in PPCM-pregnancies. It also presents clinical and basic science data on the current state of knowledge on PPCM and brings them in context thereby highlighting promising new insights in diagnostic tools and therapeutic approaches and management.
Collapse
Affiliation(s)
- Denise Hilfiker-Kleiner
- Department of Cardiology and Angiology, Medical School Hannover, Carl-Neuberg-Str. 1, 30625 Hannover, Germany
| | - Arash Haghikia
- Department of Cardiology and Angiology, Medical School Hannover, Carl-Neuberg-Str. 1, 30625 Hannover, Germany
| | - Justus Nonhoff
- Department of Cardiology and Angiology, Medical School Hannover, Carl-Neuberg-Str. 1, 30625 Hannover, Germany
| | - Johann Bauersachs
- Department of Cardiology and Angiology, Medical School Hannover, Carl-Neuberg-Str. 1, 30625 Hannover, Germany
| |
Collapse
|
8
|
Lutz R, Prechtl C, Nonhoff J, Weisel T, Damien CJ, Schlegel KA. Biofunctionalization of the implant surface with different concentrations of a synthetic peptide (P-15). Clin Oral Implants Res 2012; 24:781-6. [PMID: 22458517 DOI: 10.1111/j.1600-0501.2012.02455.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/25/2012] [Indexed: 11/29/2022]
Abstract
OBJECTIVE This study aimed at identifying the ideal concentration of a biofunctional surface coating of dental implants with a synthetic peptide (P-15). In a previous study, P-15 was shown to enhance osseointegration parameters. MATERIAL AND METHODS Implants (modified ANKYLOS(®) A8; FRIADENT Plus(®) surface) with five different concentrations (0-400 μg/ml) of a P-15 coating as well as uncoated controls were inserted in the frontal bone of 45 adult domestic pigs. The histomorphometric and microradiographic findings for the coated implants were compared to those for the uncoated ones after 7, 14, and 30 days. RESULTS No significant differences were observed comparing the peri-implant bone density between the coated and uncoated implants The bone-to-implant contact, as the primary histological parameter for osseointegration, showed high rates for all surfaces investigated (between 73.3 ± 17.9% for the control and 81.9 ± 15.2% for P15 20 μg/ml after 30 days). CONCLUSIONS No significant benefit on osseointegration of a biofunctional P-15 coating of dental implants could be displayed in the present study.
Collapse
Affiliation(s)
- R Lutz
- Department of Oral and Maxillofacial Surgery, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen, Germany.
| | | | | | | | | | | |
Collapse
|
9
|
Lutz R, Srour S, Nonhoff J, Weisel T, Damien CJ, Schlegel KA. Biofunctionalization of titanium implants with a biomimetic active peptide (P-15) promotes early osseointegration. Clin Oral Implants Res 2010; 21:726-34. [PMID: 20636727 DOI: 10.1111/j.1600-0501.2009.01904.x] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
OBJECTIVES The early stages of peri-implant bone formation play an essential role in the osseointegration and long-term success of dental implants. By incorporating bioactive coatings, this biofunctionalization of implant surfaces may enhance the attachment of the implant to the surrounding bone and stimulate bone regeneration. MATERIAL AND METHODS To demonstrate faster osseointegration, the surfaces of dental implants were grit-blasted and acid-etched. They were then coated with hydroxyapatite (HA) and experimental implants were further coated with a biomimetic active peptide (P-15) in one of two concentrations. These biofunctionalized samples and controls with no peptide were placed in the forehead region of 12 adult pigs. Six animals were evaluated for a period of 14 or 30 days. RESULTS Histomorphometric analysis demonstrated that the implants with the high concentration of P-15 had significantly higher percentage of bone-to-implant contact (BIC) at 14 (P=0.018) and 30 (P=0.015) days compared with the other groups. Both concentrations of P-15 showed increased peri-implant bone density compared to the control group at 30 days. CONCLUSION Biofunctionalization of the implant surface with a biomimetic active peptide leads to significantly increased BIC rates at 14 and 30 days and higher peri-implant bone density at 30 days.
Collapse
Affiliation(s)
- R Lutz
- Department of Oral and Maxillofacial Surgery, University of Erlangen-Nuremberg, Erlangen, Germany.
| | | | | | | | | | | |
Collapse
|
10
|
Porsch-Ozçürümez M, Hardt PD, Schnell-Kretschmer H, von Bergmann K, Darui C, Nonhoff J, Abletshauser C, Klör HU. Effects of fluvastatin on biliary lipids in subjects with an elevated cholesterol saturation index. Eur J Clin Pharmacol 2001; 56:873-9. [PMID: 11317474 DOI: 10.1007/s002280000254] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
OBJECTIVE 3-Hydroxy-3-methylglutaryl-coenzyme A (HMG-CoA) reductase inhibitors have been suggested as agents to reduce the biliary cholesterol saturation index (CSI) in duodenal bile and therefore might be supportive in primary or secondary prevention of gallstones. However, the efficiency of the therapy seems to depend on both the HMG-CoA reductase inhibitor used and the study population selected. METHODS We therefore investigated the effect of a high-dose application of fluvastatin on biliary lipid composition in 21 subjects exhibiting mild hypercholesterolaemia and a history of current gallstones or cholecystectomy due to gallstone disease. Subjects were treated either with 40 mg fluvastatin twice per day over a 3-month period (n = 14) or with placebo (n = 7). Bile samples were aspirated during endoscopy after intravenous ceruletid stimulation before and after therapy. RESULTS Both groups were comparable in CSI (mean +/- SD) at baseline (1.78 +/- 0.2 placebo vs. 1.97 +/- 0.4 verum). CSI significantly decreased in the verum group to 1.45 +/- 0.4 (P = 0.003) mainly due to increased phospholipid levels, whereas no difference was observed in the placebo group (1.85 +/- 0.7, n.s.). In addition, the verum group exhibited a significant reduction of hydrophobic deoxycholic acid, which has been reported to induce cholesterol crystal precipitation, and an increase of hydrophilic cholic acid. CONCLUSION Fluvastatin might decrease the risk of cholesterol gallstone formation in patients with elevated biliary CSI during long-term treatment by reduction of biliary cholesterol saturation and percentage change in deoxycholic acid content.
Collapse
Affiliation(s)
- M Porsch-Ozçürümez
- Universitätsklinikum Regensburg, Institut für Klinische Chemie und Blutbank, Franz-Josef-Strauss-Allee 11, D-93053 Regensburg, Germany.
| | | | | | | | | | | | | | | |
Collapse
|
11
|
|