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Buder V, Augustin M, Schäfer I, Welsch G, Catala-Lehnen P, Herberger K. [Prevalence of dermatomycoses in professional football players : A study based on data of German Bundesliga fitness check-ups (2013-2015) compared to data of the general population]. Hautarzt 2018; 69:401-407. [PMID: 29417157 DOI: 10.1007/s00105-017-4120-3] [Citation(s) in RCA: 5] [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] [Indexed: 11/30/2022]
Abstract
BACKGROUND The prevention, early diagnosis and treatment of onychomycosis is of great importance for professional athletes to avoid physical limitations by complications. So far, there is only little data on the prevalence of dermatomycosis in professional athletes. OBJECTIVES The aim of the study was to detect the prevalence of dermatomycosis in professional football players compared to the general population. MATERIALS AND METHODS The prospective, non-interventional, controlled study on the prevalence of dermatomycosis in professional football players was carried out on football players of a German Bundesliga team compared with a previously studied, equivalently aged German working population. A questionnaire survey, a dermatological check-up and a microbiological detection of pathogens in cases of suspicion were performed. RESULTS Data of 84 football players (n = 45 in 2013; n = 39 in 2015) were compared to data of n = 8186 male employees between 17 and 35 years of age. In the group of athletes, there were findings of 60.7% onychomycosis, 36.9% of tinea pedis and 17.8% of pityriasis versicolor. In the group of the age-equivalent general German working population the findings were: onychomycosis 3.3%, tinea pedis 3.2%, pityriasis versicolor 1.4%. CONCLUSION Our study shows a clearly higher risk for fungal diseases of the skin especially on the feet of professional football players. The results show a necessity for elucidation within prevention and the establishment of an appropriate therapy of dermatomycosis for professional football players.
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Affiliation(s)
- V Buder
- Institut für Versorgungsforschung in der Dermatologie und bei Pflegeberufen (IVDP), Universitätsklinikum Hamburg-Eppendorf (UKE), Martinistr. 52, 20246, Hamburg, Deutschland.
| | - M Augustin
- Institut für Versorgungsforschung in der Dermatologie und bei Pflegeberufen (IVDP), Universitätsklinikum Hamburg-Eppendorf (UKE), Martinistr. 52, 20246, Hamburg, Deutschland
| | - I Schäfer
- Institut für Versorgungsforschung in der Dermatologie und bei Pflegeberufen (IVDP), Universitätsklinikum Hamburg-Eppendorf (UKE), Martinistr. 52, 20246, Hamburg, Deutschland
| | - G Welsch
- Universitäres Kompetenzzentrum für Sport- und Bewegungsmedizin, Universitätsklinikum Hamburg-Eppendorf (UKE), Hamburg, Deutschland
| | - P Catala-Lehnen
- Zentrum für Sport- und Regenerationsmedizin, LANS Medicum, Hamburg, Deutschland
| | - K Herberger
- Institut für Versorgungsforschung in der Dermatologie und bei Pflegeberufen (IVDP), Universitätsklinikum Hamburg-Eppendorf (UKE), Martinistr. 52, 20246, Hamburg, Deutschland
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Rendenbach C, Kohlmeier C, Suling A, Assaf AT, Catala-Lehnen P, Amling M, Heiland M, Riecke B. Prospective biomechanical analysis of donor-site morbidity after fibula free flap. J Craniomaxillofac Surg 2016; 44:155-9. [DOI: 10.1016/j.jcms.2015.10.027] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Revised: 09/29/2015] [Accepted: 10/26/2015] [Indexed: 11/16/2022] Open
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Lohse C, Catala-Lehnen P, Regier M, Heiland M. Superior performance of cone beam tomography in detecting a calcaneus fracture. GMS Interdiscip Plast Reconstr Surg DGPW 2015; 4:Doc09. [PMID: 26605132 PMCID: PMC4637842 DOI: 10.3205/iprs000068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Cone beam computed tomography is a state-of-the-art imaging tool, initially developed for dental and maxillofacial application. With its high resolution and low radiation dose, cone beam tomography has been expanding its application fields, for example, to diagnosis of traumata and fractures in the head and neck area. In this study, we demonstrate superior and satisfactory performance of cone beam tomography for the imaging of a calcaneus fracture in comparison to conventional X-ray and computed tomography.
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Affiliation(s)
- Christian Lohse
- Department of Oral and Maxillofacial Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | | | - Marc Regier
- Diagnostic and Interventional Radiology, University Medical Center Hamburg-Eppendorf, University of Hamburg, Germany
| | - Max Heiland
- Department of Oral and Maxillofacial Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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Baldauf C, Jeschke A, Kanbach V, Catala-Lehnen P, Baumhoer D, Gerull H, Buhs S, Amling M, Nollau P, Harroch S, Schinke T. The Protein Tyrosine Phosphatase Rptpζ Suppresses Osteosarcoma Development in Trp53-Heterozygous Mice. PLoS One 2015; 10:e0137745. [PMID: 26360410 PMCID: PMC4567063 DOI: 10.1371/journal.pone.0137745] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2015] [Accepted: 08/20/2015] [Indexed: 12/22/2022] Open
Abstract
Osteosarcoma (OS), a highly aggressive primary bone tumor, belongs to the most common solid tumors in growing children. Since specific molecular targets for OS treatment remain to be identified, surgical resection combined with multimodal (neo-)adjuvant chemotherapy is still the only way to help respective individuals. We have previously identified the protein tyrosine phosphatase Rptpζ as a marker of terminally differentiated osteoblasts, which negatively regulates their proliferation in vitro. Here we have addressed the question if Rptpζ can function as a tumor suppressor protein inhibiting OS development in vivo. We therefore analyzed the skeletal phenotype of mice lacking Ptprz1, the gene encoding Rptpζ on a tumor-prone genetic background, i.e. Trp53-heterozygosity. By screening a large number of 52 week old Trp53-heterozygous mice by contact radiography we found that Ptprz1-deficiency significantly enhanced OS development with 19% of the mice being affected. The tumors in Ptprz1-deficient Trp53-heterozygous mice were present in different locations (spine, long bones, ribs), and their OS nature was confirmed by undecalcified histology. Likewise, cell lines derived from the tumors were able to undergo osteogenic differentiation ex vivo. A comparison between Ptprz1-heterozygous and Ptprz1-deficient cultures further revealed that the latter ones displayed increased proliferation, a higher abundance of tyrosine-phosphorylated proteins and resistance towards the influence of the growth factor Midkine. Our findings underscore the relevance of Rptpζ as an attenuator of proliferation in differentiated osteoblasts and raise the possibility that activating Rptpζ-dependent signaling could specifically target osteoblastic tumor cells.
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Affiliation(s)
- Christina Baldauf
- Department of Osteology and Biomechanics, University Medical Center Hamburg Eppendorf, Hamburg 20246, Germany
| | - Anke Jeschke
- Department of Osteology and Biomechanics, University Medical Center Hamburg Eppendorf, Hamburg 20246, Germany
| | - Vincent Kanbach
- Department of Osteology and Biomechanics, University Medical Center Hamburg Eppendorf, Hamburg 20246, Germany
| | - Philip Catala-Lehnen
- Department of Osteology and Biomechanics, University Medical Center Hamburg Eppendorf, Hamburg 20246, Germany
| | - Daniel Baumhoer
- Bone Tumor Reference Center at the Institute of Pathology, University Hospital Basel, Basel 4031, Switzerland
| | - Helwe Gerull
- Research Institute Children’s Cancer Center and Clinic of Pediatric Hematology and Oncology, University Medical Center Hamburg Eppendorf, Hamburg, Hamburg 20246, Germany
| | - Sophia Buhs
- Research Institute Children’s Cancer Center and Clinic of Pediatric Hematology and Oncology, University Medical Center Hamburg Eppendorf, Hamburg, Hamburg 20246, Germany
| | - Michael Amling
- Department of Osteology and Biomechanics, University Medical Center Hamburg Eppendorf, Hamburg 20246, Germany
| | - Peter Nollau
- Research Institute Children’s Cancer Center and Clinic of Pediatric Hematology and Oncology, University Medical Center Hamburg Eppendorf, Hamburg, Hamburg 20246, Germany
| | - Sheila Harroch
- Department of Neuroscience, Institute Pasteur, Paris 75624, France
| | - Thorsten Schinke
- Department of Osteology and Biomechanics, University Medical Center Hamburg Eppendorf, Hamburg 20246, Germany
- * E-mail:
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Jeschke A, Catala-Lehnen P, Sieber S, Bickert T, Schweizer M, Koehne T, Wintges K, Marshall RP, Mautner A, Duchstein L, Otto B, Horst AK, Amling M, Kreienkamp HJ, Schinke T. Sharpin Controls Osteogenic Differentiation of Mesenchymal Bone Marrow Cells. J Immunol 2015; 195:3675-84. [PMID: 26363054 DOI: 10.4049/jimmunol.1402392] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2014] [Accepted: 08/11/2015] [Indexed: 01/24/2023]
Abstract
The cytosolic protein Sharpin is a component of the linear ubiquitin chain assembly complex, which regulates NF-κB signaling in response to specific ligands, such as TNF-α. Its inactivating mutation in chronic proliferative dermatitis mutation (Cpdm) mice causes multiorgan inflammation, yet this phenotype is not transferable into wild-type mice by hematopoietic stem cell transfer. Recent evidence demonstrated that Cpdm mice additionally display low bone mass, and that this osteopenia is corrected by Tnf deletion. Because the cellular mechanism underlying this pathology, however, was still undefined, we performed a thorough skeletal phenotyping of Cpdm mice on the basis of nondecalcified histology and cellular and dynamic histomorphometry. We show that the trabecular and cortical osteopenia in Cpdm mice is solely explained by impaired bone formation, whereas osteoclastogenesis is unaffected. Consistently, Cpdm primary calvarial cells display reduced osteogenic capacity ex vivo, and the same was observed with CD11b(-) bone marrow cells. Unexpectedly, short-term treatment of these cultures with TNF-α did not reveal an impaired molecular response in the absence of Sharpin. Instead, genome-wide and gene-specific expression analyses revealed that Cpdm mesenchymal cells display increased responsiveness toward TNF-α-induced expression of specific cytokines, such as CXCL5, IL-1β, and IL-6. Therefore, our data not only demonstrate that the skeletal defects of Cpdm mice are specifically caused by impaired differentiation of osteoprogenitor cells, they also suggest that increased cytokine expression in mesenchymal bone marrow cells contributes to the inflammatory phenotype of Cpdm mice.
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Affiliation(s)
- Anke Jeschke
- Department of Osteology and Biomechanics, University Medical Center Hamburg-Eppendorf, Hamburg 20246, Germany
| | - Philip Catala-Lehnen
- Department of Osteology and Biomechanics, University Medical Center Hamburg-Eppendorf, Hamburg 20246, Germany
| | - Sabrina Sieber
- Department of Human Genetics, University Medical Center Hamburg-Eppendorf, Hamburg 20246, Germany
| | - Thomas Bickert
- Department of Osteology and Biomechanics, University Medical Center Hamburg-Eppendorf, Hamburg 20246, Germany
| | - Michaela Schweizer
- Center of Molecular Neurobiology, University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany
| | - Till Koehne
- Department of Osteology and Biomechanics, University Medical Center Hamburg-Eppendorf, Hamburg 20246, Germany
| | - Kristofer Wintges
- Department of Osteology and Biomechanics, University Medical Center Hamburg-Eppendorf, Hamburg 20246, Germany
| | - Robert P Marshall
- Department of Osteology and Biomechanics, University Medical Center Hamburg-Eppendorf, Hamburg 20246, Germany
| | - Andrea Mautner
- Department of Osteology and Biomechanics, University Medical Center Hamburg-Eppendorf, Hamburg 20246, Germany
| | - Lara Duchstein
- Department of Osteology and Biomechanics, University Medical Center Hamburg-Eppendorf, Hamburg 20246, Germany
| | - Benjamin Otto
- Department of Clinical Chemistry, University Medical Center Hamburg-Eppendorf, Hamburg 20246, Germany; and
| | - Andrea K Horst
- Institute of Experimental Immunology and Hematology, University Medical Center Hamburg-Eppendorf, Hamburg 20246, Germany
| | - Michael Amling
- Department of Osteology and Biomechanics, University Medical Center Hamburg-Eppendorf, Hamburg 20246, Germany
| | - Hans-Juergen Kreienkamp
- Department of Human Genetics, University Medical Center Hamburg-Eppendorf, Hamburg 20246, Germany;
| | - Thorsten Schinke
- Department of Osteology and Biomechanics, University Medical Center Hamburg-Eppendorf, Hamburg 20246, Germany;
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Kollmann K, Pestka JM, Kühn SC, Schöne E, Schweizer M, Karkmann K, Otomo T, Catala-Lehnen P, Failla AV, Marshall RP, Krause M, Santer R, Amling M, Braulke T, Schinke T. Decreased bone formation and increased osteoclastogenesis cause bone loss in mucolipidosis II. EMBO Mol Med 2013; 5:1871-86. [PMID: 24127423 PMCID: PMC3914524 DOI: 10.1002/emmm.201302979] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [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: 04/30/2013] [Revised: 09/06/2013] [Accepted: 09/09/2013] [Indexed: 01/03/2023] Open
Abstract
Mucolipidosis type II (MLII) is a severe multi-systemic genetic disorder caused by missorting of lysosomal proteins and the subsequent lysosomal storage of undegraded macromolecules. Although affected children develop disabling skeletal abnormalities, their pathogenesis is not understood. Here we report that MLII knock-in mice, recapitulating the human storage disease, are runted with accompanying growth plate widening, low trabecular bone mass and cortical porosity. Intralysosomal deficiency of numerous acid hydrolases results in accumulation of storage material in chondrocytes and osteoblasts, and impaired bone formation. In osteoclasts, no morphological or functional abnormalities are detected whereas osteoclastogenesis is dramatically increased in MLII mice. The high number of osteoclasts in MLII is associated with enhanced osteoblastic expression of the pro-osteoclastogenic cytokine interleukin-6, and pharmacological inhibition of bone resorption prevented the osteoporotic phenotype of MLII mice. Our findings show that progressive bone loss in MLII is due to the presence of dysfunctional osteoblasts combined with excessive osteoclastogenesis. They further underscore the importance of a deep skeletal phenotyping approach for other lysosomal diseases in which bone loss is a prominent feature.
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Affiliation(s)
- Katrin Kollmann
- Department of Biochemistry, Children's Hospital, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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Marshall RP, Catala-Lehnen P. Determination of reference values for dynamic spinal parameters using video rasterstereography. Scoliosis 2013. [PMCID: PMC3847787 DOI: 10.1186/1748-7161-8-s2-o33] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Krause M, Oheim R, Catala-Lehnen P, Pestka JM, Hoffmann C, Huebner W, Peters F, Barvencik F, Amling M. Metaphyseal bone formation induced by a new injectable β-TCP-based bone substitute: a controlled study in rabbits. J Biomater Appl 2013; 28:859-68. [PMID: 23669497 DOI: 10.1177/0885328213484816] [Citation(s) in RCA: 14] [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] [Indexed: 11/15/2022]
Abstract
PURPOSE Adequate filling of bone defects still poses a challenge in every day clinical work. As many bone defects are irregularly shaped the need for appropriate scaffolds reaching the complete defect surface are great. The purpose of this pre-clinical pilot study was to investigate the handling, biocompatibility, biodegradation and osteoconductivity of a new pasty bone substitute (pure phase β-TCP, hyaluronic acid, methylcellulose) in bone tissue. METHODS In an unilateral tibial defect model the peri-implant and bone tissue response to the new pasty bone substitute was tested in New Zealand white rabbits for up to 24 weeks compared to empty controls. Analysis included HR-pQCT scans, histomorphometric evaluation and quantification of vascularization of un-decalcified histological slices. RESULTS After 1 week the experimental group presented significantly higher new bone volume fraction (p = 0.021) primarily consisting of immature bone matrix and higher vessel density compared to controls (p = 0.013). After 4 weeks bone formation was not significantly different to controls but was distributed more evenly throughout the defect. Bone matrix was now mineralized and trabeculae were thicker than in controls (p = 0.002) indicating faster intramedullary bone maturation. Controls presented extensive periosteal bone formation, major fibrous tissue influx and high vascularization. After 12 and 24 weeks there was no new bone detectable. There were no severe signs of inflammation at all time points. CONCLUSION The substitute showed an early induction of bone formation. It promoted accelerated intramedullary bone repair and maturation and prevented periosteal bone formation indicating its potential use for reconstructive surgery of bone defects.
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Affiliation(s)
- Matthias Krause
- 1Department of Osteology and Biomechanics, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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Albers J, Keller J, Baranowsky A, Beil FT, Catala-Lehnen P, Schulze J, Amling M, Schinke T. Canonical Wnt signaling inhibits osteoclastogenesis independent of osteoprotegerin. J Exp Med 2013. [DOI: 10.1084/jem2104oia1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Albers J, Keller J, Baranowsky A, Beil FT, Catala-Lehnen P, Schulze J, Amling M, Schinke T. Canonical Wnt signaling inhibits osteoclastogenesis independent of osteoprotegerin. ACTA ACUST UNITED AC 2013; 200:537-49. [PMID: 23401003 PMCID: PMC3575535 DOI: 10.1083/jcb.201207142] [Citation(s) in RCA: 142] [Impact Index Per Article: 12.9] [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] [Indexed: 12/17/2022]
Abstract
Canonical Wnt signaling through Fzd8 and β-catenin negatively regulates osteoclast differentiation and reduces bone resorption independent of osteoprotegerin. Although Wnt signaling is considered a key regulatory pathway for bone formation, inactivation of β-catenin in osteoblasts does not affect their activity but rather causes increased osteoclastogenesis due to insufficient production of osteoprotegerin (Opg). By monitoring the expression pattern of all known genes encoding Wnt receptors in mouse tissues and bone cells we identified Frizzled 8 (Fzd8) as a candidate regulator of bone remodeling. Fzd8-deficient mice displayed osteopenia with normal bone formation and increased osteoclastogenesis, but this phenotype was not associated with impaired Wnt signaling or Opg production by osteoblasts. The deduced direct negative influence of canonical Wnt signaling on osteoclastogenesis was confirmed in vitro and through the generation of mice lacking β-catenin in the osteoclast lineage. Here, we observed increased bone resorption despite normal Opg production and a resistance to the anti-osteoclastogenic effect of Wnt3a. These results demonstrate that Fzd8 and β-catenin negatively regulate osteoclast differentiation independent of osteoblasts and that canonical Wnt signaling controls bone resorption by two different mechanisms.
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Affiliation(s)
- Joachim Albers
- Department of Osteology and Biomechanics, University Medical Center Hamburg Eppendorf, Hamburg 20246, Germany
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Pohlenz P, Atac A, Catala-Lehnen P, Khakpour P, Li L, Klatt J, Schmelzle R. RETRACTED ARTICLE: Donor site morbidity of the vascularized fibula: the Hamburg experience. Clin Oral Investig 2012; 16:1333. [DOI: 10.1007/s00784-012-0717-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2011] [Accepted: 03/05/2012] [Indexed: 11/29/2022]
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Sondergaard BC, Catala-Lehnen P, Huebner AK, Bay-Jensen AC, Schinke T, Henriksen K, Schilling S, Haberland M, Nielsen RH, Amling M, Karsdal MA. Mice over-expressing salmon calcitonin have strongly attenuated osteoarthritic histopathological changes after destabilization of the medial meniscus. Osteoarthritis Cartilage 2012; 20:136-43. [PMID: 22122987 DOI: 10.1016/j.joca.2011.11.004] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [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: 01/24/2011] [Revised: 10/18/2011] [Accepted: 11/04/2011] [Indexed: 02/02/2023]
Abstract
OBJECTIVE Calcitonin is well-known for its inhibitory actions on bone-resorbing osteoclasts and recently potential beneficial effects on cartilage were shown. We investigated effects of salmon calcitonin (sCT) on the articular cartilage and bone, after destabilization of the medial meniscus (DMM) in normal and sCT over-expressing mice. DESIGN Bone phenotype of transgenic (TG) C57Bl/6 mice over-expressing sCT at 6 months and 12 months was investigated by (1) serum osteocalcin and urinary deoxypyridinoline and (2) dynamic and normal histomorphometry of vertebrae bodies. In subsequent evaluation of cartilage and subchondral bone changes, 44 10-week old TG or wild-type (WT) mice were randomized into four groups and subjected to DMM or sham-operations. After 7 weeks animals were sacrificed, and knee joints were isolated for histological analysis. RESULTS Trabecular bone volume (BV/TV) increased 150% after 6 months and 300% after 12 months in sCT-expressing mice when compared to WT controls (P<0.05). Osteoblast number, bone formation rate and osteocalcin measurements were not affected in TG mice over-expressing sCT. In WT animals, a 5-fold increase in the quantitative erosion index was observed after DMM, and the semi-quantitative OARSI score showed over 400% (P<0.001) increase, compared to sham-operated WT mice. DMM-operated TG mice were protected against cartilage erosion and showed a 65% and 64% (P<0.001) reduction, respectively, for the two histopathological evaluation methods. CONCLUSIONS sCT over-expressing mice had higher bone volume, and were protected against cartilage erosion. These data suggest that increased levels of sCT may hamper the pathogenesis of osteoarthritis (OA). However more studies are necessary to confirm these preliminary results.
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Affiliation(s)
- B C Sondergaard
- Cartilage Biology and Biomarker R&D, Nordic Bioscience, Herlev, Denmark.
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Keller J, Catala-Lehnen P, Wintges K, Schulze J, Bickert T, Ito W, Horst AK, Amling M, Schinke T. Transgenic over-expression of interleukin-33 in osteoblasts results in decreased osteoclastogenesis. Biochem Biophys Res Commun 2011; 417:217-22. [PMID: 22142849 DOI: 10.1016/j.bbrc.2011.11.088] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2011] [Accepted: 11/17/2011] [Indexed: 10/15/2022]
Abstract
Interleukin-33 (IL-33) is the most recently identified member of the IL-1 family of cytokines, which is primarily known for its proinflammatory functions. We have previously reported that IL-33 is expressed by bone-forming osteoblasts, and that administration of recombinant IL-33 to bone marrow cultures inhibits their differentiation into bone-resorbing osteoclasts. Likewise, while the inhibitory effect of IL-33 on osteoclast differentiation was fully abolished in cultures lacking the IL-33 receptor ST2, mice lacking ST2 displayed low bone mass caused by increased osteoclastogenesis. Although these data suggested a physiological role of IL-33 as an inhibitor of bone resorption, direct in vivo evidence supporting such a function was still missing. Here we describe the generation and bone histomorphometric analysis of a transgenic mouse model (Col1a1-Il33) over-expressing IL-33 specifically in osteoblasts. While we did not observe differences in osteoblast number and bone formation between wildtype and Col1a1-Il33 mice, the number of osteoclasts was significantly reduced compared to wildtype littermates in two independent transgenic lines. Since we did not observe quantitative differences in the populations of eosinophils, neutrophils, basophils or M2-macrophages from the bone marrow of wildtype and Col1a1-Il33 mice, our data demonstrate that an inhibition of osteoclastogenesis is one of the major physiological functions of IL-33, at least in mice.
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Affiliation(s)
- Johannes Keller
- Department of Osteology and Biomechanics, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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Catala-Lehnen P, Nüchtern JV, Briem D, Klink T, Rueger JM, Lehmann W. Comparison of 2D and 3D navigation techniques for percutaneous screw insertion into the scaphoid: Results of an experimental cadaver study. ACTA ACUST UNITED AC 2011; 16:280-7. [DOI: 10.3109/10929088.2011.621092] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Saeed H, Abdallah BM, Ditzel N, Catala-Lehnen P, Qiu W, Amling M, Kassem M. Telomerase-deficient mice exhibit bone loss owing to defects in osteoblasts and increased osteoclastogenesis by inflammatory microenvironment. J Bone Miner Res 2011; 26:1494-505. [PMID: 21308778 DOI: 10.1002/jbmr.349] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Telomere shortening owing to telomerase deficiency leads to accelerated senescence of human skeletal (mesenchymal) stem cells (MSCs) in vitro, whereas overexpression leads to telomere elongation, extended life span, and enhanced bone formation. To study the role of telomere shortening in vivo, we studied the phenotype of telomerase-deficient mice (Terc(-/-)). Terc(-/-) mice exhibited accelerated age-related bone loss starting at 3 months of age and during 12 months of follow-up revealed by dual-energy X-ray absorptiometric (DXA) scanning and by micro-computed tomography (µCT). Bone histomorphometry revealed decreased mineralized surface and bone-formation rate as well as increased osteoclast number and size in Terc(-/-) mice. Also, serum total deoxypyridinoline (tDPD) was increased in Terc(-/-) mice. MSCs and osteoprogenitors isolated from Terc(-/-) mice exhibited intrinsic defects with reduced proliferating cell number and impaired osteogenic differentiation capacity. In addition, the Terc(-/-) -MSC cultures accumulated a larger proportion of senescent β-galactosidase(+) cells and cells exhibiting DNA damage. Microarray analysis of Terc(-/-) bone revealed significant overexpression of a large number of proinflammatory genes involved in osteoclast (OC) differentiation. Consistently, serum obtained from Terc(-/-) mice enhanced OC formation of wild-type bone marrow cultures. Our data demonstrate two mechanisms for age-related bone loss caused by telomerase deficiency: intrinsic osteoblastic defects and creation of a proinflammatory osteoclast-activating microenvironment. Thus telomerization of MSCs may provide a novel approach for abolishing age-related bone loss.
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Affiliation(s)
- Hamid Saeed
- Endocrine Research Laboratory, KMEB, Department of Endocrinology and Metabolism, Odense University Hospital and University of Southern Denmark, Odense, Denmark
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Neunaber C, Catala-Lehnen P, Beil FT, Marshall RP, Kanbach V, Baranowsky A, Lehmann W, Streichert T, Ignatius A, Muramatsu T, Schinke T, Amling M. Increased trabecular bone formation in mice lacking the growth factor midkine. J Bone Miner Res 2010; 25:1724-35. [PMID: 20200993 DOI: 10.1002/jbmr.75] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [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: 01/18/2023]
Abstract
Midkine (Mdk) and pleiotrophin (Ptn) comprise a family of heparin-binding growth factors known primarily for their effects on neuronal cells. Since transgenic mice overexpressing Ptn have been reported to display increased bone density, we have previously analyzed Ptn-deficient mice but failed to detect any abnormality of skeletal development and remodeling. Together with the finding that Mdk expression increases in the course of primary osteoblast differentiation, we reasoned that Mdk, rather than Ptn, could play a physiologic role in bone formation. Here, we show that Mdk-deficient mice display an increased trabecular bone volume at 12 and 18 months of age, accompanied by cortical porosity. Histomorphometric quantification demonstrated an increased bone-formation rate compared with wild-type littermates, whereas bone resorption was differentially affected in trabecular and cortical bone of Mdk-deficient mice. To understand the effect of Mdk on bone formation at the molecular level, we performed a genome-wide expression analysis of primary osteoblasts and identified Ank and Enpp1 as Mdk-induced genes whose decreased expression in Mdk-deficient osteoblasts may explain, at least in part, the observed skeletal phenotype. Finally, we performed ovariectomy and observed bone loss only in wild-type but not in Mdk-deficient animals. Taken together, our data demonstrate that Mdk deficiency, at least in mice, results in an increased trabecular bone formation, thereby raising the possibility that Mdk-specific antagonists might prove beneficial in osteoporosis therapy.
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Affiliation(s)
- Claudia Neunaber
- Department of Osteology and Biomechanics, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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17
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Grossterlinden L, Rueger J, Catala-Lehnen P, Rupprecht M, Lehmann W, Rücker A, Briem D. Factors influencing the accuracy of iliosacral screw placement in trauma patients. Int Orthop 2010; 35:1391-6. [PMID: 20640933 DOI: 10.1007/s00264-010-1092-7] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2010] [Revised: 05/24/2010] [Accepted: 06/28/2010] [Indexed: 12/01/2022]
Abstract
Correct placement of iliosacral screws remains a surgical challenge. The aim of this retrospective study was to identify parameters which impact the accuracy of this technically demanding procedure. Eighty-two patients with vertically unstable pelvic injuries treated with a total of 147 iliosacral screws were included. Assessment of postoperative CT scans revealed screw misplacement in 13 cases (8%), of which six occurred following insertion of two unilateral screws into S1. Six screw misplacements occurred in patients with dislocation injuries of the posterior pelvis. Comparison of a navigated and the standard technique revealed a decreased screw misplacement rate in the navigated group (15% standard vs. 3% navigation, p < 0.05). In addition, the malposition rate was influenced by the surgeon's individual experience (20% for low vs. 3.9% for high volume surgeons, p < 0.05). Overall, the accuracy of iliosacral screw placement depends on the number of screws inserted into S1 and the extent of dislocation. In experienced hands, the use of navigation represents a helpful tool to improve the placement accuracy.
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Affiliation(s)
- Lars Grossterlinden
- Department of Trauma-, Hand- and Reconstructive Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
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18
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Huebner AK, Keller J, Catala-Lehnen P, Perkovic S, Streichert T, Emeson RB, Amling M, Schinke T. The role of calcitonin and alpha-calcitonin gene-related peptide in bone formation. Arch Biochem Biophys 2008; 473:210-7. [PMID: 18307972 DOI: 10.1016/j.abb.2008.02.013] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2007] [Revised: 02/08/2008] [Accepted: 02/12/2008] [Indexed: 12/26/2022]
Abstract
The Calca gene encodes two polypeptides, calcitonin (CT) and alpha-calcitonin gene-related peptide (alpha-CGRP), generated through alternative splicing. While CT, a hormone mainly produced by thyroidal C cells, has been described as a major regulator of bone resorption, alpha-CGRP, a neuropeptide expressed in the cells of the central and peripheral nervous system, is mostly known as a regulator of vascular tone. Surprisingly, the generation and skeletal analyses of two mouse deficiency models has recently uncovered a physiological function for both peptides in the regulation of bone formation. In the first model, where the replacement of exons 2-5 of the Calca gene resulted in the combined deficiency of CT and alpha-CGRP, an increased bone formation rate (BFR) was observed, whereas decreased BFR was found in the second model, where the introduction of a translational termination codon into exon 5 of the Calca gene resulted in the specific absence of alpha-CGRP.
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Affiliation(s)
- Antje K Huebner
- Center of Biomechanics and Skeletal Biology, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, Hamburg 20246, Germany
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19
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Abstract
Osteochondritis dissecans is a disorder with a prevalence of 0.01 to 0.06 %. Men between 16 and 36 years of age are most commonly affected by it. In the western hemisphere, the knee is affected by this progressive disorder in 75 % of the cases, specifically the medial femoral condyle (70 - 80 %). The etiology is uncertain, although genetic defects, micro-trauma, ossification disorders and ischemia have been implicated. Pathogenetically, Osteochondritis dissecans is classified in four stages, whereas in stage one, there is merely a subchondrial edema. Without therapy this could lead to stage 4, with a free osteochondral joint fragment. Treatment is analogous with the stage of the disorder. Whereas conservative treatment may yield full recovery during stage 1, starting in stage 2, invasive treatment should be considered. When the cartilage surface remains intact retrograde procedures are indicated. If the cartilage is injured anterograde therapies, like the chondral or osteochondral transplantation, should be used.
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Affiliation(s)
- J P Petersen
- Klinik und Poliklinik für Orthopädie, Universitätsklinikum Hamburg-Eppendorf, Martinistrasse 52, 20246 Hamburg.
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Steinhagen J, Petersen JP, Catala-Lehnen P, Bruns J. [Surgical therapy for cartilage damage of the knee joint]. Z Orthop Ihre Grenzgeb 2005; 143:R83-95; quiz R96-9. [PMID: 16224668 DOI: 10.1055/s-2005-872900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Affiliation(s)
- J Steinhagen
- Klinik und Poliklinik für Orthopädie, Universitätsklinikum Hamburg-Eppendorf, Hamburg
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Günther T, Poli C, Müller JM, Catala-Lehnen P, Schinke T, Yin N, Vomstein S, Amling M, Schüle R. Fhl2 deficiency results in osteopenia due to decreased activity of osteoblasts. EMBO J 2005; 24:3049-56. [PMID: 16079911 PMCID: PMC1201354 DOI: 10.1038/sj.emboj.7600773] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2005] [Accepted: 07/14/2005] [Indexed: 11/09/2022] Open
Abstract
Osteoporosis is one of the major health problems today, yet little is known about the loss of bone mass caused by reduced activity of the bone-forming osteoblasts. Here we show that mice deficient for the transcriptional cofactor four and a half LIM domains 2 (Fhl2) exhibit a dramatic decrease of bone mass in both genders. Osteopenia is caused by a reduced bone formation rate that is solely due to the diminished activity of Fhl2-deficient osteoblasts, while their number remains unchanged. The number and activity of the bone-resorbing cells, the osteoclasts, is not altered. Enforced expression of Fhl2 in differentiated osteoblasts boosts mineralization in cell culture and, importantly, enhances bone formation in transgenic animals. Fhl2 increases the transcriptional activity of runt-related transcription factor 2 (Runx2), a key regulator of osteoblast function, and both proteins interact in vitro and in vivo. In summary, we present Fhl2-deficient mice as a unique model for osteopenia due to decreased osteoblast activity. Our data offer a novel concept to fight osteoporosis by modulating the anabolic activity of osteoblasts via Fhl2.
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Affiliation(s)
- Thomas Günther
- Universitäts-Frauenklinik und Zentrum für Klinische Forschung, Klinikum der Universität Freiburg, Freiburg, Germany
| | - Cecilia Poli
- Universitäts-Frauenklinik und Zentrum für Klinische Forschung, Klinikum der Universität Freiburg, Freiburg, Germany
| | - Judith M Müller
- Universitäts-Frauenklinik und Zentrum für Klinische Forschung, Klinikum der Universität Freiburg, Freiburg, Germany
| | - Philip Catala-Lehnen
- Department of Trauma, Hand and Reconstructive Surgery, Hamburg University School of Medicine, Hamburg, Germany
- Experimental Trauma Surgery and Skeletal Biology, Center for Biomechanics, Hamburg University School of Medicine, Hamburg, Germany
| | - Thorsten Schinke
- Department of Trauma, Hand and Reconstructive Surgery, Hamburg University School of Medicine, Hamburg, Germany
- Experimental Trauma Surgery and Skeletal Biology, Center for Biomechanics, Hamburg University School of Medicine, Hamburg, Germany
| | - Na Yin
- Universitäts-Frauenklinik und Zentrum für Klinische Forschung, Klinikum der Universität Freiburg, Freiburg, Germany
| | - Sandra Vomstein
- Universitäts-Frauenklinik und Zentrum für Klinische Forschung, Klinikum der Universität Freiburg, Freiburg, Germany
| | - Michael Amling
- Department of Trauma, Hand and Reconstructive Surgery, Hamburg University School of Medicine, Hamburg, Germany
- Experimental Trauma Surgery and Skeletal Biology, Center for Biomechanics, Hamburg University School of Medicine, Hamburg, Germany
| | - Roland Schüle
- Universitäts-Frauenklinik und Zentrum für Klinische Forschung, Klinikum der Universität Freiburg, Freiburg, Germany
- Zentrum für Klinische Forschung, Molekulare Gynäkologie, Universitäts-Frauenklinik, Breisacherstr. 66, 79106 Freiburg, Germany. Tel.: +49 761 270 6310; Fax: +49 761 270 6311; E-mail:
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Schinke T, Liese S, Priemel M, Haberland M, Schilling AF, Catala-Lehnen P, Blicharski D, Rueger JM, Gagel RF, Emeson RB, Amling M. Decreased bone formation and osteopenia in mice lacking alpha-calcitonin gene-related peptide. J Bone Miner Res 2004; 19:2049-56. [PMID: 15537449 DOI: 10.1359/jbmr.040915] [Citation(s) in RCA: 117] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/07/2004] [Revised: 06/02/2004] [Accepted: 07/23/2004] [Indexed: 11/18/2022]
Abstract
UNLABELLED We recently described an unexpected high bone mass phenotype in mice lacking the Calca gene that encodes CT and alphaCGRP. Here we show that mice specifically lacking alphaCGRP expression display an osteopenia caused by a decreased bone formation. These results show that alphaCGRP is a physiological activator of bone formation and that the high bone mass phenotype of the Calca-deficient mice is caused by the absence of CT. INTRODUCTION Calcitonin (CT) and alpha-calcitonin gene-related peptide (alphaCGRP) are two polypeptides without completely defined physiologic functions that are both derived from the Calca gene by alternative splicing. We have recently described an unexpected high bone mass phenotype in mice carrying a targeted deletion of the Calca gene. To uncover whether this phenotype is caused by the absence of CT or by the absence of alphaCGRP, we analyzed a mouse model, where the production of alphaCGRP is selectively abolished. MATERIALS AND METHODS Bones from Calca(-/-) mice, alphaCGRP(-/-) mice, and their corresponding wildtype controls were analyzed using radiography, muCT imaging, and undecalcified histology. Cellular activities were assessed using dynamic histomorphometry and by measuring the urinary collagen degradation products. CT expression was determined using radioimmunoassay and RT-PCR. Immunohistochemistry was performed using an anti-CGRP antibody on decalcified bone sections. RESULTS Unlike the Calca-deficient mice, the alphaCGRP-deficient mice do not display a high bone mass phenotype. In contrast, they develop an osteopenia that is caused by a reduced bone formation rate. Serum levels and thyroid expression of CT are not elevated in alphaCGRP-deficient mice. While CGRP expression is detectable in neuronal cell close to trabecular bone structures, the components of the CGRP receptor are expressed in differentiated osteoblast cultures. CONCLUSION The discrepancy between the bone phenotypes of Calca(-/-) mice and alphaCGRP(-/-) mice show that the high bone mass phenotype of the Calca(-/-) mice is caused by the absence of CT. The osteopenia observed in the alphaCGRP(-/-) mice that have normal levels of CT further show that alphaCGRP is a physiologic activator of bone formation.
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Affiliation(s)
- Thorsten Schinke
- Department of Trauma, Hand, and Reconstructive Surgery, Hamburg University School of Medicine, Martinistrasse 52, Hamburg 20246, Germany
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Hoff AO, Catala-Lehnen P, Thomas PM, Priemel M, Rueger JM, Nasonkin I, Bradley A, Hughes MR, Ordonez N, Cote GJ, Amling M, Gagel RF. Increased bone mass is an unexpected phenotype associated with deletion of the calcitonin gene. J Clin Invest 2003. [PMID: 12488435 DOI: 10.1172/jci200214218] [Citation(s) in RCA: 151] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Calcitonin (CT) is a known inhibitor of bone resorption. Calcitonin gene-related peptide-alpha (CGRPalpha), produced by alternative RNA processing of the CT/CGRP gene, has no clearly defined role in bone. To better understand the physiologic role of the CT/CGRP gene we created a mouse in which the coding sequences for both CT and CGRPalpha were deleted by homologous recombination. The CT/CGRP(-/-) knockout (KO) mice procreated normally, there were no identifiable developmental defects at birth, and they had normal baseline calcium-related chemistry values. However, KO animals were more responsive to exogenous human parathyroid hormone as evidenced by a greater increase of the serum calcium concentration and urine deoxypyridinoline crosslinks, an effect reversed by CT and mediated by a greater increase in bone resorption than in controls. Surprisingly, KO mice have significantly greater trabecular bone volume and a 1.5- to 2-fold increase in bone formation at 1 and 3 months of age. This effect appears to be mediated by increased bone formation. In addition, KO mice maintain bone mass following ovariectomy, whereas wild-type mice lose approximately one-third of their bone mass over 2 months. These findings argue for dual roles for CT/CGRP gene products: prevention of bone resorption in hypercalcemic states and a regulatory role in bone formation.
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Affiliation(s)
- Ana O Hoff
- Department of Endocrine Neoplasia and Hormonal Disorders, University of Texas M.D. Anderson Cancer Center, Houston, Texas, USA
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24
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Hoff AO, Catala-Lehnen P, Thomas PM, Priemel M, Rueger JM, Nasonkin I, Bradley A, Hughes MR, Ordonez N, Cote GJ, Amling M, Gagel RF. Increased bone mass is an unexpected phenotype associated with deletion of the calcitonin gene. J Clin Invest 2002; 110:1849-57. [PMID: 12488435 PMCID: PMC151647 DOI: 10.1172/jci14218] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Calcitonin (CT) is a known inhibitor of bone resorption. Calcitonin gene-related peptide-alpha (CGRPalpha), produced by alternative RNA processing of the CT/CGRP gene, has no clearly defined role in bone. To better understand the physiologic role of the CT/CGRP gene we created a mouse in which the coding sequences for both CT and CGRPalpha were deleted by homologous recombination. The CT/CGRP(-/-) knockout (KO) mice procreated normally, there were no identifiable developmental defects at birth, and they had normal baseline calcium-related chemistry values. However, KO animals were more responsive to exogenous human parathyroid hormone as evidenced by a greater increase of the serum calcium concentration and urine deoxypyridinoline crosslinks, an effect reversed by CT and mediated by a greater increase in bone resorption than in controls. Surprisingly, KO mice have significantly greater trabecular bone volume and a 1.5- to 2-fold increase in bone formation at 1 and 3 months of age. This effect appears to be mediated by increased bone formation. In addition, KO mice maintain bone mass following ovariectomy, whereas wild-type mice lose approximately one-third of their bone mass over 2 months. These findings argue for dual roles for CT/CGRP gene products: prevention of bone resorption in hypercalcemic states and a regulatory role in bone formation.
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Affiliation(s)
- Ana O Hoff
- Department of Endocrine Neoplasia and Hormonal Disorders, University of Texas M.D. Anderson Cancer Center, Houston, Texas, USA
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