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Verbruggen ASK, McNamara LM. Mechanoregulation may drive osteolysis during bone metastasis: A finite element analysis of the mechanical environment within bone tissue during bone metastasis and osteolytic resorption. J Mech Behav Biomed Mater 2023; 138:105662. [PMID: 36630755 DOI: 10.1016/j.jmbbm.2023.105662] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 12/22/2022] [Accepted: 01/04/2023] [Indexed: 01/09/2023]
Abstract
Metastatic bone disease occurs in 70-80% of advanced breast cancer patients and bone tissue is accepted to have attractive physical properties that facilitate cancer cell attraction, adhesion, and invasion. Bone cells also facilitate tumour invasion by biochemical signalling and through resorption of the bone matrix (osteolysis), which releases factors that further stimulate tumour cell activity. The evolving mechanical environment during tumour invasion might play an important role in these processes, as the activity of both bone and cancer cells is regulated by mechanical cues. In particular bone loss and altered mineralisation have been reported, yet how these alter the mechanical environment local to bone and tumour cells is unknown. The objective of this study is to quantify changes in the mechanical environment within bone tissue, during bone metastasis and osteolytic resorption, using finite element analysis (FEA) models reconstructed from high-resolution μCT images of metastatic mouse bone. In particular, we quantify time-dependent changes in mechanical stimuli, local to and distant from an invading tumour mass, to investigate putative mechanobiological cues for osteolysis during bone metastasis. We report here that in early metastasis (3 weeks after tumour inoculation), there was a decrease in strain distribution within the proximal femur trabecular and distal cortical bone tissue. These changes in the mechanical environment preceded extensive osteolytic destruction, but coincided with the onset of early osteolysis, cortical thickening and mineralisation of proximal and distal femur bone. We propose that early changes in the mechanical environment within bone tissue may activate resorption by osteoclast cells and thereby contribute to the extensive osteolytic bone loss at later stage (6 weeks) bone metastasis.
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Affiliation(s)
- Anneke S K Verbruggen
- Mechanobiology and Medical Device Research Group (MMDRG), Biomedical Engineering, College of Science and Engineering, University of Galway, Ireland
| | - Laoise M McNamara
- Mechanobiology and Medical Device Research Group (MMDRG), Biomedical Engineering, College of Science and Engineering, University of Galway, Ireland.
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2
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Verbruggen ASK, McCarthy EC, Dwyer RM, McNamara LM. Temporal and spatial changes in bone mineral content and mechanical properties during breast-cancer bone metastases. Bone Rep 2022; 17:101597. [PMID: 35754558 PMCID: PMC9218171 DOI: 10.1016/j.bonr.2022.101597] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 05/02/2022] [Accepted: 06/09/2022] [Indexed: 12/29/2022] Open
Abstract
Cancer cells favour migration and metastasis to bone tissue for 70–80 % of advanced breast cancer patients and it has been proposed that bone tissue provides attractive physical properties that facilitate tumour invasion, resulting in osteolytic and or osteoblastic metastasis. However, it is not yet known how specific bone tissue composition is associated with tumour invasion. In particular, how compositional and nano-mechanical properties of bone tissue evolve during metastasis, and where in the bone they arise, may affect the overall aggressiveness of tumour invasion, but this is not well understood. The objective of this study is to develop an advanced understanding of temporal and spatial changes in nano-mechanical properties and composition of bone tissue during metastasis. Primary mammary tumours were induced by inoculation of immune-competent BALB/c mice with 4T1 breast cancer cells in the mammary fat pad local to the right femur. Microcomputed tomography and nanoindentation were conducted to quantify cortical and trabecular bone matrix mineralisation and nano-mechanical properties. Analysis was performed in proximal and distal femur regions (spatial analysis) of tumour-adjacent (ipsilateral) and contralateral femurs after 3 weeks and 6 weeks of tumour and metastasis development (temporal analysis). By 3 weeks post-inoculation there was no significant difference in bone volume fraction or nano-mechanical properties of bone tissue between the metastatic femora and healthy controls. However, early osteolysis was indicated by trabecular thinning in the distal and proximal trabecular compartment of tumour-bearing femora. Moreover, cortical thickness was significantly increased in the distal region, and the mean mineral density was significantly higher in cortical and trabecular bone tissue in both proximal and distal regions, of ipsilateral (tumour-bearing) femurs compared to healthy controls. By 6 weeks post-inoculation, overt osteolytic lesions were identified in all ipsilateral metastatic femora, but also in two of four contralateral femora of tumour-bearing mice. Bone volume fraction, cortical area, cortical and trabecular thickness were all significantly decreased in metastatic femora (both ipsilateral and contralateral). Trabecular bone tissue stiffness in the proximal femur decreased in the ipsilateral femurs compared to contralateral and control sites. Temporal and spatial analysis of bone nano-mechanical properties and mineralisation during breast cancer invasion reveals changes in bone tissue composition prior to and following overt metastatic osteolysis, local and distant from the primary tumour site. These changes may alter the mechanical environment of both the bone and tumour cells, and thereby play a role in perpetuating the cancer vicious cycle during breast cancer metastasis to bone tissue. Temporal and spatial analyses of bone tissue properties following breast cancer metastasis Trabecular thinning initiated by 3 weeks but overt osteolysis not evident until 6 weeks. Increased bone mineralisation and distal cortical thickness by 3-weeks post-inoculation
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Affiliation(s)
- Anneke S K Verbruggen
- Mechanobiology and Medical Device Research group (MMDRG), Biomedical Engineering, College of Science and Engineering, National University of Ireland Galway, Ireland
| | - Elan C McCarthy
- Discipline of Surgery, Lambe Institute for Translational Research, National University of Ireland Galway, Ireland
| | - Roisin M Dwyer
- Discipline of Surgery, Lambe Institute for Translational Research, National University of Ireland Galway, Ireland
| | - Laoise M McNamara
- Mechanobiology and Medical Device Research group (MMDRG), Biomedical Engineering, College of Science and Engineering, National University of Ireland Galway, Ireland
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Li J, Wang X, Yang F, Yuan J, Cui Q, Nie F, Zhang J. Matrine enhances osteogenic differentiation of bone marrow-derived mesenchymal stem cells and promotes bone regeneration in rapid maxillary expansion. Arch Oral Biol 2020; 118:104862. [PMID: 32810708 DOI: 10.1016/j.archoralbio.2020.104862] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Revised: 07/22/2020] [Accepted: 07/29/2020] [Indexed: 10/23/2022]
Abstract
OBJECTIVE The aim of this study was to evaluate the influence of matrine on osteogenic differentiation of rat bone marrow-derived mesenchymal stem cells (BMSCs) as well as on bone metabolism in a rat rapid maxillary expansion (RME) model. METHODS In in vitro experiments, rat BMSCs were adopted and cell proliferation of BMSCs was measured. Meanwhile, the osteogenic differentiation of BMSCs was detected by alkaline phosphatase (ALP) activity assay, Alizarin red S staining and gene expression. In vivo bone regeneration was analyzed in a rat RME model. Eighteen rats were divided into 3 groups: one group without any treatment, one group receiving only RME, and a group with RME and matrine treatment. After 2 weeks, new bone formation was detected by Micro-CT and histology. Immunohistochemical staining was used to evaluate ALP and BMP2 expression. RESULTS Overall, we found that matrine upregulated cell proliferation dose-dependently. Also, ALP activity and mineralized matrix generation were enhanced. Moreover, the osteoblast-related gene expression (ALP, bone sialoprotein and osteocalcin) by BMSCs was also promoted. Micro-CT revealed that matrine significantly promoted in vivo bone formation after 2 weeks. Concomitantly, histological examination of haematoxylin-eosin, safranin-O and toluidine blue staining confirmed these findings. In addition, the levels of ALP and BMP2 in the palatal suture tissues of rats with matrine treatment were the highest among three groups. CONCLUSION This work suggests that matrine regulates osteogenesis and enhances bone regeneration. Matrine treatment may be beneficial in improving the stability of maxillary expansion.
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Affiliation(s)
- Jing Li
- Department of Orthodontics, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, Shandong Province, China
| | - Xuxia Wang
- Department of Oral and Maxillofacial Surgery, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, Shandong Province, China
| | - Fan Yang
- Department of Orthodontics, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, Shandong Province, China; Department of Oral and Maxillofacial Surgery, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, Shandong Province, China
| | - Jiakan Yuan
- Department of Stomatology, Heze Municipal Hospital, Heze, Shandong Province, China
| | - Qun Cui
- Department of Orthodontics, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, Shandong Province, China; Department of Oral and Maxillofacial Surgery, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, Shandong Province, China
| | - Fujiao Nie
- Department of Orthodontics, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, Shandong Province, China; Department of Oral and Maxillofacial Surgery, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, Shandong Province, China
| | - Jun Zhang
- Department of Orthodontics, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, Shandong Province, China; Department of Oral and Maxillofacial Surgery, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, Shandong Province, China.
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Patient-Derived Xenograft Models for Endometrial Cancer Research. Int J Mol Sci 2018; 19:ijms19082431. [PMID: 30126113 PMCID: PMC6121639 DOI: 10.3390/ijms19082431] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2018] [Revised: 08/03/2018] [Accepted: 08/13/2018] [Indexed: 12/21/2022] Open
Abstract
Endometrial cancer (EC) is the most common malignancy of the genital tract among women in developed countries. Recently, a molecular classification of EC has been performed providing a system that, in conjunction with histological observations, reliably improves EC classification and enhances patient management. Patient-derived xenograft models (PDX) represent nowadays a promising tool for translational research, since they closely resemble patient tumour features and retain molecular and histological features. In EC, PDX models have already been used, mainly as an individualized approach to evaluate the efficacy of novel therapies and to identify treatment-response biomarkers; however, their uses in more global or holistic approaches are still missing. As a collaborative effort within the ENITEC network, here we describe one of the most extensive EC PDX cohorts developed from primary tumour and metastasis covering all EC subtypes. Our models are histologically and molecularly characterized and represent an excellent reservoir of EC tumour samples for translational research. This review compiles the information on current methods of EC PDX generation and their utility and provides new perspectives for the exploitation of these valuable tools in order to increase the success ratio for translating results to clinical practice.
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Navone NM, Labanca E. Modeling Cancer Metastasis. PATIENT-DERIVED XENOGRAFT MODELS OF HUMAN CANCER 2017. [DOI: 10.1007/978-3-319-55825-7_7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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6
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Longitudinal imaging of the ageing mouse. Mech Ageing Dev 2016; 160:93-116. [PMID: 27530773 DOI: 10.1016/j.mad.2016.08.001] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Revised: 07/30/2016] [Accepted: 08/04/2016] [Indexed: 12/13/2022]
Abstract
Several non-invasive imaging techniques are used to investigate the effect of pathologies and treatments over time in mouse models. Each preclinical in vivo technique provides longitudinal and quantitative measurements of changes in tissues and organs, which are fundamental for the evaluation of alterations in phenotype due to pathologies, interventions and treatments. However, it is still unclear how these imaging modalities can be used to study ageing with mice models. Almost all age related pathologies in mice such as osteoporosis, arthritis, diabetes, cancer, thrombi, dementia, to name a few, can be imaged in vivo by at least one longitudinal imaging modality. These measurements are the basis for quantification of treatment effects in the development phase of a novel treatment prior to its clinical testing. Furthermore, the non-invasive nature of such investigations allows the assessment of different tissue and organ phenotypes in the same animal and over time, providing the opportunity to study the dysfunction of multiple tissues associated with the ageing process. This review paper aims to provide an overview of the applications of the most commonly used in vivo imaging modalities used in mouse studies: micro-computed-tomography, preclinical magnetic-resonance-imaging, preclinical positron-emission-tomography, preclinical single photon emission computed tomography, ultrasound, intravital microscopy, and whole body optical imaging.
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Cole HA, Ohba T, Ichikawa J, Nyman JS, Cates JMM, Haro H, Schwartz HS, Schoenecker JG. Micro-computed tomography derived anisotropy detects tumor provoked deviations in bone in an orthotopic osteosarcoma murine model. PLoS One 2014; 9:e97381. [PMID: 24892952 PMCID: PMC4043681 DOI: 10.1371/journal.pone.0097381] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2014] [Accepted: 04/17/2014] [Indexed: 02/04/2023] Open
Abstract
Radiographic imaging plays a crucial role in the diagnosis of osteosarcoma. Currently, computed-tomography (CT) is used to measure tumor-induced osteolysis as a marker for tumor growth by monitoring the bone fractional volume. As most tumors primarily induce osteolysis, lower bone fractional volume has been found to correlate with tumor aggressiveness. However, osteosarcoma is an exception as it induces osteolysis and produces mineralized osteoid simultaneously. Given that competent bone is highly anisotropic (systematic variance in its architectural order renders its physical properties dependent on direction of load) and that tumor induced osteolysis and osteogenesis are structurally disorganized relative to competent bone, we hypothesized that μCT-derived measures of anisotropy could be used to qualitatively and quantitatively detect osteosarcoma provoked deviations in bone, both osteolysis and osteogenesis, in vivo. We tested this hypothesis in a murine model of osteosarcoma cells orthotopically injected into the tibia. We demonstrate that, in addition to bone fractional volume, μCT-derived measure of anisotropy is a complete and accurate method to monitor osteosarcoma-induced osteolysis. Additionally, we found that unlike bone fractional volume, anisotropy could also detect tumor-induced osteogenesis. These findings suggest that monitoring tumor-induced changes in the structural property isotropy of the invaded bone may represent a novel means of diagnosing primary and metastatic bone tumors.
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Affiliation(s)
- Heather A. Cole
- Department of Orthopaedics and Rehabilitation, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
| | - Tetsuro Ohba
- Department of Orthopaedics and Rehabilitation, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
| | - Jiro Ichikawa
- Department of Orthopaedics and Rehabilitation, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
| | - Jeffry S. Nyman
- Department of Orthopaedics and Rehabilitation, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
| | - Justin M. M. Cates
- Department of Pathology, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
| | - Hirotaka Haro
- Department of Orthopaedic Surgery, Faculty of Medicine, University of Yamanashi, Yamanashi, Japan
| | - Herbert S. Schwartz
- Department of Orthopaedics and Rehabilitation, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
| | - Jonathan G. Schoenecker
- Department of Orthopaedics and Rehabilitation, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
- * E-mail:
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Wu JJ, Liu J, Chen EB, Wang JJ, Cao L, Narayan N, Fergusson MM, Rovira II, Allen M, Springer DA, Lago CU, Zhang S, DuBois W, Ward T, deCabo R, Gavrilova O, Mock B, Finkel T. Increased mammalian lifespan and a segmental and tissue-specific slowing of aging after genetic reduction of mTOR expression. Cell Rep 2013; 4:913-20. [PMID: 23994476 PMCID: PMC3784301 DOI: 10.1016/j.celrep.2013.07.030] [Citation(s) in RCA: 226] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2013] [Revised: 07/11/2013] [Accepted: 07/24/2013] [Indexed: 12/31/2022] Open
Abstract
We analyzed aging parameters using a mechanistic target of rapamycin (mTOR) hypomorphic mouse model. Mice with two hypomorphic (mTOR(Δ/Δ)) alleles are viable but express mTOR at approximately 25% of wild-type levels. These animals demonstrate reduced mTORC1 and mTORC2 activity and exhibit an approximately 20% increase in median survival. While mTOR(Δ/Δ) mice are smaller than wild-type mice, these animals do not demonstrate any alterations in normalized food intake, glucose homeostasis, or metabolic rate. Consistent with their increased lifespan, mTOR(Δ/Δ) mice exhibited a reduction in a number of aging tissue biomarkers. Functional assessment suggested that, as mTOR(Δ/Δ) mice age, they exhibit a marked functional preservation in many, but not all, organ systems. Thus, in a mammalian model, while reducing mTOR expression markedly increases overall lifespan, it affects the age-dependent decline in tissue and organ function in a segmental fashion.
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Affiliation(s)
- J. Julie Wu
- Center for Molecular Medicine, National Heart Lung and Blood Institute, NIH Bethesda, MD 20892
| | - Jie Liu
- Center for Molecular Medicine, National Heart Lung and Blood Institute, NIH Bethesda, MD 20892
| | - Edmund B. Chen
- Center for Molecular Medicine, National Heart Lung and Blood Institute, NIH Bethesda, MD 20892
| | - Jennifer J. Wang
- Center for Molecular Medicine, National Heart Lung and Blood Institute, NIH Bethesda, MD 20892
| | - Liu Cao
- Key Laboratory of Medical Cell Biology, China Medical University, Shenyang 110001 China
| | - Nisha Narayan
- Center for Molecular Medicine, National Heart Lung and Blood Institute, NIH Bethesda, MD 20892
| | - Marie M. Fergusson
- Center for Molecular Medicine, National Heart Lung and Blood Institute, NIH Bethesda, MD 20892
| | - Ilsa I. Rovira
- Center for Molecular Medicine, National Heart Lung and Blood Institute, NIH Bethesda, MD 20892
| | - Michele Allen
- Murine Phenotyping Core, National Heart Lung and Blood Institute, NIH Bethesda, MD 20892
| | - Danielle A. Springer
- Murine Phenotyping Core, National Heart Lung and Blood Institute, NIH Bethesda, MD 20892
| | - Cory U. Lago
- Center for Molecular Medicine, National Heart Lung and Blood Institute, NIH Bethesda, MD 20892
| | - Shuling Zhang
- Laboratory of Cancer Biology and Genetics, National Cancer Institute, NIH Bethesda, MD 20892
| | - Wendy DuBois
- Laboratory of Cancer Biology and Genetics, National Cancer Institute, NIH Bethesda, MD 20892
| | - Theresa Ward
- Translational Gerontology Branch, National Institute of Aging, NIH Baltimore MD 21224
| | - Rafael deCabo
- Translational Gerontology Branch, National Institute of Aging, NIH Baltimore MD 21224
| | - Oksana Gavrilova
- Mouse Metabolism Core, National Institute of Diabetes, Digestive and Kidney Disease, NIH Bethesda, MD 20892
| | - Beverly Mock
- Laboratory of Cancer Biology and Genetics, National Cancer Institute, NIH Bethesda, MD 20892
| | - Toren Finkel
- Center for Molecular Medicine, National Heart Lung and Blood Institute, NIH Bethesda, MD 20892
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Hsu JT, Chen YJ, Tsai MT, Lan HHC, Cheng FC, Chen MYC, Wang SP. Predicting cortical bone strength from DXA and dental cone-beam CT. PLoS One 2012; 7:e50008. [PMID: 23226234 PMCID: PMC3511426 DOI: 10.1371/journal.pone.0050008] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2012] [Accepted: 10/15/2012] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVE This study compared the capabilities of dual-energy X-ray absorptiometry (DXA) and dental cone-beam computed tomography (CBCT) for predicting the cortical bone strength of rat femurs and tibias. MATERIALS AND METHODS Specimens of femurs and tibias obtained from 14 rats were first scanned with DXA to obtain the areal bone mineral density (BMD) of the midshaft cortical portion of the bones. The bones were then scanned using dental CBCT to measure the volumetric cortical bone mineral density (vCtBMD) and the cross-sectional moment of inertia (CSMI) for calculating the bone strength index (BSI). A three-point bending test was conducted to measure the fracture load of each femur and tibia. Bivariate linear Pearson analysis was used to calculate the correlation coefficients (r values) among the CBCT measurements, DXA measurements, and three-point bending parameters. RESULTS The correlation coefficients for the associations of the fracture load with areal BMD (measured using DXA), vCtBMD (measured using CBCT), CSMI (measured using CBCT), and BSI were 0.585 (p = 0.028) and 0.532 (p = 0.050) (for the femur and tibia, respectively), 0.638 (p = 0.014) and 0.762 (p = 0.002), 0.778 (p = 0.001) and 0.792 (p<0.001), and 0.822 (p<0.001) and 0.842 (p<0.001), respectively. CONCLUSIONS CBCT was found to be superior to DXA for predicting cortical bone fracture loads in rat femurs and tibias. The BSI, which is a combined index of densitometric and geometric parameters, was especially useful. Further clinical studies are needed to validate the predictive value of BSI obtained from CBCT and should include testing on human cadaver specimens.
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Affiliation(s)
- Jui-Ting Hsu
- School of Dentistry, College of Medicine, China Medical University, Taichung, Taiwan
| | - Ying-Ju Chen
- Stem Cell Center, Department of Medical Research, Taichung Veterans General Hospital, Taichung, Taiwan
| | - Ming-Tzu Tsai
- Department of Biomedical Engineering, Hungkuang University, Taichung, Taiwan
| | - Howard Haw-Chang Lan
- Department of Radiology, Taichung Veterans General Hospital, Taichung, Taiwan
- School of Radiological Technology, Central Taiwan University of Science and Technology, Taichung, Taiwan
| | - Fu-Chou Cheng
- Stem Cell Center, Department of Medical Research, Taichung Veterans General Hospital, Taichung, Taiwan
| | - Michael Y. C. Chen
- School of Dentistry, College of Medicine, China Medical University, Taichung, Taiwan
| | - Shun-Ping Wang
- Department of Orthopaedics, Taichung Veterans General Hospital, Taichung, Taiwan
- * E-mail:
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Wan X, Li ZG, Yingling JM, Yang J, Starbuck MW, Ravoori MK, Kundra V, Vazquez E, Navone NM. Effect of transforming growth factor beta (TGF-β) receptor I kinase inhibitor on prostate cancer bone growth. Bone 2012; 50:695-703. [PMID: 22173053 PMCID: PMC3278589 DOI: 10.1016/j.bone.2011.11.022] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/02/2011] [Revised: 11/20/2011] [Accepted: 11/24/2011] [Indexed: 12/17/2022]
Abstract
Transforming growth factor beta 1 (TGF-β1) has been implicated in the pathogenesis of prostate cancer (PCa) bone metastasis. In this study, we tested the antitumor efficacy of a selective TGF-β receptor I kinase inhibitor, LY2109761, in preclinical models. The effect of LY2109761 on the growth of MDA PCa 2b and PC-3 human PCa cells and primary mouse osteoblasts (PMOs) was assessed in vitro by measuring radiolabeled thymidine incorporation into DNA. In vivo, the right femurs of male SCID mice were injected with PCa cells. We monitored the tumor burden in control- and LY2109761-treated mice with MRI analysis and the PCa-induced bone response with X-ray and micro-CT analyses. Histologic changes in bone were studied by performing bone histomorphometric evaluations. PCa cells and PMOs expressed TGF-β receptor I. TGF-β1 induced pathway activation (as assessed by induced expression of p-Smad2) and inhibited cell growth in PC-3 cells and PMOs but not in MDA PCa 2b cells. LY2109761 had no effect on PCa cells but induced PMO proliferation in vitro. As expected, LY2109761 reversed the TGF-β1-induced pathway activation and growth inhibition in PC-3 cells and PMOs. In vivo, LY2109761 treatment for 6weeks resulted in increased volume in normal bone and increased osteoblast and osteoclast parameters. In addition, LY2109761 treatment significantly inhibited the growth of MDA PCa 2b and PC-3 in the bone of SCID mice (p<0.05); moreover, it resulted in significantly less bone loss and change in osteoclast-associated parameters in the PC-3 tumor-bearing bones than in the untreated mice. In summary, we report for the first time that targeting TGF-β receptors with LY2109761 can control PCa bone growth while increasing the mass of normal bone. This increased bone mass in nontumorous bone may be a desirable side effect of LY2109761 treatment for men with osteopenia or osteoporosis secondary to androgen-ablation therapy, reinforcing the benefit of effectively controlling PCa growth in bone. Thus, targeting TGF-β receptor I is a valuable intervention in men with advanced PCa.
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Affiliation(s)
- Xinhai Wan
- Department of Genitourinary Medical Oncology – Research, Unit 18-6, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX 77030, USA
| | - Zhi-Gang Li
- Department of Genitourinary Medical Oncology – Research, Unit 18-6, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX 77030, USA
| | - Jonathan M. Yingling
- Angiogenesis and Tumor Microenvironment Biology, DC0546, Room H4320C, Lilly Research Laboratories, Oncology Division, Eli Lilly and Company, Indianapolis, IN 46285, USA
| | - Jun Yang
- Department of Genitourinary Medical Oncology – Research, Unit 18-6, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX 77030, USA
| | - Michael W. Starbuck
- Department of Genitourinary Medical Oncology – Research, Unit 18-6, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX 77030, USA
| | - Murali K. Ravoori
- Department of Experimental Diagnostic Imaging, Unit 368, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX 77030, USA
| | - Vikas Kundra
- Department of Diagnostic Radiology, Unit 1473, The University of Texas MD Anderson Cancer Center, PO Box 301402, Houston, TX 77030, USA
| | - Elba Vazquez
- Department of Biological Chemistry, University of Buenos Aires, and Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina
| | - Nora M. Navone
- Department of Genitourinary Medical Oncology – Research, Unit 18-6, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX 77030, USA
- Corresponding author: Department of Genitourinary Medical Oncology – Research, Unit 18-6, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX 77030, USA. Tel.: 1 (713) 563-7273; Fax: 1 (713) 745-9880;
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11
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Cole HA, Ichikawa J, Colvin DC, O'Rear L, Schoenecker JG. Quantifying intra-osseous growth of osteosarcoma in a murine model with radiographic analysis. J Orthop Res 2011; 29:1957-62. [PMID: 21656849 DOI: 10.1002/jor.21474] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2011] [Accepted: 05/18/2011] [Indexed: 02/04/2023]
Abstract
The orthotopic murine osteosarcoma model is an excellent representation of the human condition as mice develop rapid growth of 'primary' tumor with subsequent lung metastasis. Currently, monitoring tumor growth relies on measuring pulmonary metastases occurring four weeks post injection. Studies show that amputation of the tumor-bearing limb is required before pulmonary metastases are detectable due to rapid growth causing morbidity. Thus, a method measuring 'primary' tumor growth independent of metastasis is required. We hypothesized that serial radiography would allow for longitudinal quantification of 'primary' osteosarcoma growth and explored this idea by utilizing the tibial orthotopic model. Tumor growth was monitored weekly by radiography and calipers, and results were compared with µCT and histology. We found that radiographs demonstrate extra and intra-osseous tumor growth by displaying lytic and blastic lesions and the surrounding radio-opaque area enlarged significantly (p < 0.0001) allowing for quantification. Additionally, radiographs proved more precise than indirect caliper measurements (intra-observer error ±6.64%: inter-observer error ±15.84%). Therefore, we determined that radiography provides accurate, longitudinal quantification of 'primary' osteosarcoma tumor that can be performed serially in the same mouse, does not require introduction of bioluminescence to the host or cell, and is more precise than the current caliper method.
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Affiliation(s)
- Heather A Cole
- Department of Orthopaedics and Rehabilitation, Vanderbilt University Medical Center, 1211 Medical Center Dr., Nashville, TN 37232, USA
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