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Geese M, Ermann M, Schneider M, Monecke S, Kaever A, Frankenreiter S, Bayerlova M, Schreiter K, Dickie A, Loke P, James T, Anighoro A, Hirsch R, Müller S, De Maeyer J. P.42Discovery of novel small molecule treatment options for FSHD. Neuromuscul Disord 2019. [DOI: 10.1016/j.nmd.2019.06.071] [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: 10/25/2022]
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2
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Schreiter K, Schneider S, Raila I, Kellner N, Bethge A, Lindner M, Ruf B, Böhme J, Grünewald T. Frequency of multi-drug resistant (MDR) pathogens in patients with osteoarticular infections. Int J Infect Dis 2018. [DOI: 10.1016/j.ijid.2018.04.3780] [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: 10/28/2022] Open
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Wilson CE, Dickie AP, Schreiter K, Wehr R, Wilson EM, Bial J, Scheer N, Wilson ID, Riley RJ. The pharmacokinetics and metabolism of diclofenac in chimeric humanized and murinized FRG mice. Arch Toxicol 2018; 92:1953-1967. [PMID: 29721588 DOI: 10.1007/s00204-018-2212-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Accepted: 04/25/2018] [Indexed: 11/30/2022]
Abstract
The pharmacokinetics of diclofenac were investigated following single oral doses of 10 mg/kg to chimeric liver humanized and murinized FRG and C57BL/6 mice. In addition, the metabolism and excretion were investigated in chimeric liver humanized and murinized FRG mice. Diclofenac reached maximum blood concentrations of 2.43 ± 0.9 µg/mL (n = 3) at 0.25 h post-dose with an AUCinf of 3.67 µg h/mL and an effective half-life of 0.86 h (n = 2). In the murinized animals, maximum blood concentrations were determined as 3.86 ± 2.31 µg/mL at 0.25 h post-dose with an AUCinf of 4.94 ± 2.93 µg h/mL and a half-life of 0.52 ± 0.03 h (n = 3). In C57BL/6J mice, mean peak blood concentrations of 2.31 ± 0.53 µg/mL were seen 0.25 h post-dose with a mean AUCinf of 2.10 ± 0.49 µg h/mL and a half-life of 0.51 ± 0.49 h (n = 3). Analysis of blood indicated only trace quantities of drug-related material in chimeric humanized and murinized FRG mice. Metabolic profiling of urine, bile and faecal extracts revealed a complex pattern of metabolites for both humanized and murinized animals with, in addition to unchanged parent drug, a variety of hydroxylated and conjugated metabolites detected. The profiles in humanized mice were different to those of both murinized and wild-type animals, e.g., a higher proportion of the dose was detected in the form of acyl glucuronide metabolites and much reduced amounts as taurine conjugates. Comparison of the metabolic profiles obtained from the present study with previously published data from C57BL/6J mice and humans revealed a greater, though not complete, match between chimeric humanized mice and humans, such that the liver humanized FRG model may represent a model for assessing the biotransformation of such compounds in humans.
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Affiliation(s)
- C E Wilson
- Nestlé Skin Health R&D, Les Templiers, Route des Colles, BP 87, 06902, Sophia-Antipolis, France.
| | - A P Dickie
- Evotec (UK) Ltd, 114 Innovation Drive, Abingdon, Oxfordshire, OX14 4RZ, UK
| | - K Schreiter
- Evotec International GmbH, Manfred Eigen Campus, Essener Bogen 7, Hamburg, Germany
| | - R Wehr
- Evotec International GmbH, Manfred Eigen Campus, Essener Bogen 7, Hamburg, Germany
| | - E M Wilson
- Yecuris Corporation, PO Box 4645, Tualatin, OR, 97062, USA
| | - J Bial
- Yecuris Corporation, PO Box 4645, Tualatin, OR, 97062, USA
| | - N Scheer
- CEVEC Pharmaceuticals GmbH, Gottfried-Hagen-Str. 60-62, 51105, Cologne, Germany
| | - I D Wilson
- Department of Surgery and Cancer, Imperial College, Exhibition Rd, South Kensington, London, SW7 2AZ, UK
| | - R J Riley
- Evotec (UK) Ltd, Alderley Park, Nether Alderley, Cheshire, SK10 4TG, UK
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Uhlig D, Spange S, Seifert A, Nagel K, Anders S, Kroll L, Stoll R, Thielbeer F, Müller P, Schreiter K. Design of nanostructured hybrid materials: twin polymerization of urethane-based twin prepolymers. RSC Adv 2018; 8:31673-31681. [PMID: 35548201 PMCID: PMC9085902 DOI: 10.1039/c8ra05310c] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Accepted: 09/04/2018] [Indexed: 11/30/2022] Open
Abstract
Organic–inorganic hybrid materials with urethane functionalities were obtained by simultaneous twin polymerization of twin prepolymers in combination with the ideal twin monomer 2,2′-spirobi[4H-1,3,2-benzodioxasiline]. The twin prepolymers consist of a urethane-based prepolymer with reactive terminal groups which can react during the twin polymerization process. Nanostructured hybrid materials with integrated dialkylsiloxane crosslinked urethane structures, phenolic resin and SiO2 are obtained in a one pot process. The effects of the polymerization temperature as well as those of various catalysts and reagent ratios on the polymerization behavior were investigated. The molecular structures of the obtained materials were determined by 13C- and 29Si-{1H}-CP-MAS NMR spectroscopies. HAADF-STEM-measurements were performed to prove the distribution of silicon in the hybrid material. Organic–inorganic hybrid materials with urethane functionalities were obtained by simultaneous twin polymerization of twin prepolymers in combination with the twin monomer 2,2′-spirobi[4H-1,3,2-benzodioxasiline].![]()
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Affiliation(s)
- D. Uhlig
- Department of Polymer Chemistry
- Chemnitz University of Technology
- Faculty of Natural Science
- D-09107 Chemnitz
- Germany
| | - S. Spange
- Department of Polymer Chemistry
- Chemnitz University of Technology
- Faculty of Natural Science
- D-09107 Chemnitz
- Germany
| | - A. Seifert
- Department of Polymer Chemistry
- Chemnitz University of Technology
- Faculty of Natural Science
- D-09107 Chemnitz
- Germany
| | - K. Nagel
- Department of Polymer Chemistry
- Chemnitz University of Technology
- Faculty of Natural Science
- D-09107 Chemnitz
- Germany
| | - S. Anders
- Department of Lightweight Structures and Polymer Technology
- Chemnitz University of Technology
- Faculty of Mechanical Engineering
- D-09107 Chemnitz
- Germany
| | - L. Kroll
- Department of Lightweight Structures and Polymer Technology
- Chemnitz University of Technology
- Faculty of Mechanical Engineering
- D-09107 Chemnitz
- Germany
| | | | | | | | - K. Schreiter
- Department of Polymer Chemistry
- Chemnitz University of Technology
- Faculty of Natural Science
- D-09107 Chemnitz
- Germany
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Dickie A, Wilson C, Schreiter K, Wehr R, Wilson E, Bial J, Scheer N, Wilson I, Riley R. The pharmacokinetics and metabolism of lumiracoxib in chimeric humanized and murinized FRG mice. Biochem Pharmacol 2017; 135:139-150. [DOI: 10.1016/j.bcp.2017.03.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Accepted: 03/21/2017] [Indexed: 10/19/2022]
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Göring M, Seifert A, Schreiter K, Müller P, Spange S. A non-aqueous procedure to synthesize amino group bearing nanostructured organic-inorganic hybrid materials. Chem Commun (Camb) 2014; 50:9753-6. [PMID: 25023389 DOI: 10.1039/c4cc03640a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [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]
Abstract
Amino-functionalized organic-inorganic hybrid materials with a narrow distributed nanostructure of 2-4 nm in size were obtained by means of a template-free and non-aqueous procedure. Simultaneous twin polymerization of novel amino group containing twin monomers with 2,2'-spirobi[4H-1,3,2-benzodioxasiline] has been applied for this purpose. The amino groups of the organic-inorganic hybrid material are useful for post derivatization.
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Affiliation(s)
- M Göring
- Department of Polymer Chemistry, Institute of Chemistry, Technische Universität Chemnitz, Strasse der Nationen 62, D-09111 Chemnitz, Germany.
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Schreiter K, Raila I, Reich A, Diez U, Robel-Tillich E, Borte M, Gebauer F, Glasow S, Gottwald HJ, Springer C, Pöge A, Gruenewald T. Primary Toxoplasmosis in pregnancy – results from an interdisciplinary approach. Int J Infect Dis 2012. [DOI: 10.1016/j.ijid.2012.05.723] [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: 10/28/2022] Open
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Feng Y, vom Hagen F, Schreiter K, Heiser C, Schilling L, Deutsch U, Hammes HP. Ang-2 Defizienz verursacht retinale Gefäßmalformation. DIABETOL STOFFWECHS 2007. [DOI: 10.1055/s-2007-982190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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vom Hagen F, Feng Y, Schreiter K, Hammes HP. Die Rolle von TNFα in Mausmodellen für diabetische und proliferative Retinopathie. DIABETOL STOFFWECHS 2007. [DOI: 10.1055/s-2007-982187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Menzel K, Hausmann M, Obermeier F, Schreiter K, Dunger N, Bataille F, Falk W, Scholmerich J, Herfarth H, Rogler G. Cathepsins B, L and D in inflammatory bowel disease macrophages and potential therapeutic effects of cathepsin inhibition in vivo. Clin Exp Immunol 2006; 146:169-80. [PMID: 16968411 PMCID: PMC1809720 DOI: 10.1111/j.1365-2249.2006.03188.x] [Citation(s) in RCA: 85] [Impact Index Per Article: 4.7] [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: 07/18/2006] [Indexed: 12/15/2022] Open
Abstract
The cathepsins D (CTSD), B (CTSB) and L (CTSL) are important for the intracellular degradation of proteins. Increased cathepsin expression is associated with inflammatory diseases. We have shown previously an induction of CTSD expression in intestinal macrophages (IMAC) in inflamed mucosa of patients with inflammatory bowel disease (IBD). Here we investigated the regulation of CTSB and CTSL in IMAC during IBD and effects of CTSD and CTSB/CTSL inhibition in vivo. Human IMAC were isolated from normal and inflamed mucosa. Reverse transcription-polymerase chain reaction (RT-PCR) was performed for CTSB and CTSL mRNA. Immunostaining was used to confirm PCR results. Cathepsin inhibition was investigated in the dextran-sulphate-sodium (DSS) colitis model in mice with application of pepstatin A (CTSD inhibitor), CA-074 (CTSB inhibitor) and Z-Phe-Tyr-aldehyde (CTSL inhibitor). CTSL mRNA was significantly up-regulated in IMAC isolated from IBD mucosa. Up-regulated protein expression was found mainly in areas of mucosal damage by immunostaining. Inhibition of CTSD in mouse DSS colitis was followed by an amelioration of the disease. Inhibitor-treated mice showed a significant lower histological score (HS) and less colon reduction in comparison to controls. Similarly, simultaneous inhibition of CTSB/CTSL was followed by a significant amelioration of colitis. Expression of tissue-degrading cathepsins is increased in IMAC in IBD. Inhibition of CTSD as well as CTSB/CTSL is followed by an amelioration of experimental colitis. The prevention of mucosal damage by cathepsin inhibition could represent a new approach for the therapy of IBD.
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Affiliation(s)
- K Menzel
- Department of Internal Medicine I, University of Regensburg, Regensburg, Germany
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Wahl MC, Jauch R, Cho MK, Jäkel S, Schreiter K, Netter C, Aicher B, Zweckstetter M, Jäckle H. Tailor made activation segment for autoinhibition. Acta Crystallogr A 2006. [DOI: 10.1107/s0108767306096887] [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
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Feng Y, Schreiter K, vom Hagen F, Beimesche S, Meyer C, Wehr R, Steuernagel A, Hammes HP. PTR-3173, ein Somatostatin-Analog, inhibiert die experimentelle diabetische Retinopathie. DIABETOL STOFFWECHS 2006. [DOI: 10.1055/s-2006-943843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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vom Hagen F, Schreiter K, Andag U, Nguyen T, Steuernagel A, Hammes HP. PTR-3173 inhibiert die pathologische Neovaskularisation in einem Tiermodell für Proliferative Diabetische Retinopathie. DIABETOL STOFFWECHS 2006. [DOI: 10.1055/s-2006-943847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Hausmann M, Paper D, Balan K, Schreiter K, Falk W, Schölmerich J, Herfarth H, Rogler G. In vivo Behandlung mit dem pflanzlichen Phenylethanoid Acteosid bessert die intestinale Entzündung nach Dextransulfat (DSS)-induzierter Kolitis. Z Gastroenterol 2005. [DOI: 10.1055/s-2005-921807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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15
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Jauch R, Jäkel S, Netter C, Schreiter K, Aicher B, Jäckle H, Wahl M. Structures of Mnk-2 reveal novel aspects of kinase regulation. Acta Crystallogr A 2005. [DOI: 10.1107/s0108767305091695] [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
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Schreiter K, Hausmann M, Spoettl T, Strauch UG, Bataille F, Schoelmerich J, Herfarth H, Falk W, Rogler G. Glycoprotein (gp) 96 expression: induced during differentiation of intestinal macrophages but impaired in Crohn's disease. Gut 2005; 54:935-43. [PMID: 15951537 PMCID: PMC1774602 DOI: 10.1136/gut.2004.053116] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [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] [Indexed: 12/08/2022]
Abstract
BACKGROUND The glycoprotein (gp) 96 links the adaptive with the innate immune system. It is a chaperone with a binding domain for peptides generated by proteasomal degradation. During cellular stress, peptide loaded gp96 can be released and presented to T cells by antigen presenting cells (APCs). METHODS mRNAs from in vitro differentiated macrophages (iv mac) and normal intestinal macrophages (IMACs) were compared by subtractive hybridisation and Affymetrix GeneChip analysis. Differentiation induced expression of gp96 was investigated in the multicellular spheroid (MCS) model. In vivo gp96 protein expression was detected by double labelling immunohistochemistry of human colon and in the CD4+ CD62L+ T cell transfer mouse model. RESULTS Five of 76 clones obtained by subtractive hybridisation revealed >99% sequence homology to gp96. Affymetrix GeneChip analysis confirmed induction of gp96 in IMACs. Gp96 mRNA was detected in IMACs from normal and intestinal bowel disease mucosa. Induction of gp96 protein was observed after seven days in the MCS model of IMAC differentiation. Immunohistochemistry confirmed the presence of gp96 protein in IMACs in normal mucosa as well as in mucosa from patients with ulcerative colitis and diverticulitis. In mucosa from Crohn's disease (CD) patients, gp96 protein was not detectable. In the CD4+ CD62L+ T cell transfer mouse model, gp96 was verifiable in non-activated IMACs. CONCLUSION Gp96 is induced during differentiation of normal IMACs but is not detected in IMACs in CD mucosa. As gp96 has been described as having a role in tolerance induction, this may be relevant for loss of tolerance against luminal bacteria found in CD patients.
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Affiliation(s)
- K Schreiter
- Department of Internal Medicine I, University of Regensburg, 93042 Regensburg, Germany
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Hausmann M, Obermeier F, Schreiter K, Spottl T, Falk W, Schölmerich J, Herfarth H, Saftig P, Rogler G. Cathepsin D is up-regulated in inflammatory bowel disease macrophages. Clin Exp Immunol 2004; 136:157-67. [PMID: 15030527 PMCID: PMC1808992 DOI: 10.1111/j.1365-2249.2004.02420.x] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.2] [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: 12/22/2022] Open
Abstract
Down-regulation of receptors involved in the recognition or transmission of inflammatory signals and a reduced responsiveness support the concept that macrophages are 'desensitized' during their differentiation in the intestinal mucosa. During inflammatory bowel disease (IBD) intestinal macrophages (IMACs) change to a reactive or 'aggressive' type. After having established a method of isolation and purification of IMACs, message for cathepsin D was one of the mRNAs we found to be up-regulated in a subtractive hybridization of Crohn's disease (CD) macrophages versus IMACs from control mucosa. The expression of cathepsin D in intestinal mucosa was analysed by immunohistochemistry in biopsies from IBD and control patients and in a mouse model of dextran sulphate sodium (DSS)-induced acute and chronic colitis. IMACs were isolated and purified from normal and inflamed mucosa by immunomagnetic beads armed with a CD33 antibody. RT-PCR was performed for cathepsin D mRNA. Results were confirmed by Northern blot and flow cytometrical analysis. Immunohistochemistry revealed a significant increase in the cathepsin D protein expression in inflamed intestinal mucosa from IBD patients compared to non-inflamed mucosa. No cathepsin D polymerase chain reaction (PCR) product could be obtained with mRNA from CD33-positive IMACs from normal mucosa. Reverse transcription (RT)-PCR showed an induction of mRNA for cathepsin D in purified IMACs from IBD patients. Northern blot and flow cytometry analysis confirmed these results. Cathepsin D protein was also found in intestinal mucosa in acute and chronic DSS-colitis but was absent in normal mucosa. This study shows that expression of cathepsin D is induced in inflammation-associated IMACs. The presence of cathepsin D might contribute to the mucosal damage in IBD.
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Affiliation(s)
- M Hausmann
- Department of Internal Medicine I, University of Regensburg, Regensburg, Germany.
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Barbin K, Wachter Y, Brünke J, Schreiter K, Peipp M, Gramatzki M, Repp R, Fey G, Valerius T. Fc receptor-directed single chain bispecific antibodies for lymphoma therapy. Eur J Cancer 2001. [DOI: 10.1016/s0959-8049(01)80429-9] [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: 11/16/2022]
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Strauss P, Schreiter K. [Preserved human cartilage grafts and autogenous viable transplants for nose and middle ear (author's transl)]. Laryngol Rhinol Otol (Stuttg) 1979; 58:201-9. [PMID: 439985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
57% of the preserved human cartilage chips being implanted in the nose lead to a remarkable up to a complete resorption. 94% of the patients have nevertheless a sufficiently or well working function of the nose; besides that they are as well satisfied with the shape of their nose. The most important reason for the resorption are mechanical factors; this has been shown by comparing the load of implanted tissue on the columella and on the dorsum of the nose. We can't exclude the possibility of late immunologic reaction. Comparing these results with those of the middle ear by missing any mechanical load, we registered nevertheless a remarkable loss of the volume of the cartilage. This is an intense indication for an immunologic reaction, especially because there is a more intense vascularisation in the middle ear and a strong activity of fibroblasts based on the mesenchymal potency of middle ear mucosa. It's only in the middle ear that preserved cartilage can be substituted by connective tissue, viable cartilage or viable bone.
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