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Miao MZ, Lee JS, Yamada KM, Loeser RF. Integrin signalling in joint development, homeostasis and osteoarthritis. Nat Rev Rheumatol 2024; 20:492-509. [PMID: 39014254 DOI: 10.1038/s41584-024-01130-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/24/2024] [Indexed: 07/18/2024]
Abstract
Integrins are key regulators of cell-matrix interactions during joint development and joint tissue homeostasis, as well as in the development of osteoarthritis (OA). The signalling cascades initiated by the interactions of integrins with a complex network of extracellular matrix (ECM) components and intracellular adaptor proteins orchestrate cellular responses necessary for maintaining joint tissue integrity. Dysregulated integrin signalling, triggered by matrix degradation products such as matrikines, disrupts this delicate balance, tipping the scales towards an environment conducive to OA pathogenesis. The interplay between integrin signalling and growth factor pathways further underscores the multifaceted nature of OA. Moreover, emerging insights into the role of endocytic trafficking in regulating integrin signalling add a new layer of complexity to the understanding of OA development. To harness the therapeutic potential of targeting integrins for mitigation of OA, comprehensive understanding of their molecular mechanisms across joint tissues is imperative. Ultimately, deciphering the complexities of integrin signalling will advance the ability to treat OA and alleviate its global burden.
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Affiliation(s)
- Michael Z Miao
- Cell Biology Section, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA
- Craniofacial Anomalies and Regeneration Section, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA
- Division of Rheumatology, Allergy, and Immunology and the Thurston Arthritis Research Center, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Janice S Lee
- Craniofacial Anomalies and Regeneration Section, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA
- Office of the Clinical Director, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA
| | - Kenneth M Yamada
- Cell Biology Section, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA.
| | - Richard F Loeser
- Division of Rheumatology, Allergy, and Immunology and the Thurston Arthritis Research Center, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
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Lee K, Niku S, Koo SJ, Belezzuoli E, Guma M. Molecular imaging for evaluation of synovitis associated with osteoarthritis: a narrative review. Arthritis Res Ther 2024; 26:25. [PMID: 38229205 PMCID: PMC10790518 DOI: 10.1186/s13075-023-03258-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Accepted: 12/28/2023] [Indexed: 01/18/2024] Open
Abstract
Recent evidence highlights the role of low-grade synovial inflammation in the progression of osteoarthritis (OA). Inflamed synovium of OA joints detected by imaging modalities are associated with subsequent progression of OA. In this sense, detecting and quantifying synovitis of OA by imaging modalities may be valuable in predicting OA progressors as well as in improving our understanding of OA progression. Of the several imaging modalities, molecular imaging such as positron emission tomography (PET) and single-photon emission computed tomography (SPECT) has an advantage of visualizing the cellular or subcellular events of the tissues. Depending on the radiotracers used, molecular imaging method can potentially detect and visualize various aspects of synovial inflammation. This narrative review summarizes the recent progresses of imaging modalities in assessing inflammation and OA synovitis and focuses on novel radiotracers. Recent studies about imaging modalities including ultrasonography (US), magnetic resonance imaging (MRI), and molecular imaging that were used to detect and quantify inflammation and OA synovitis are summarized. Novel radiotracers specifically targeting the components of inflammation have been developed. These tracers may show promise in detecting inflamed synovium of OA and help in expanding our understanding of OA progression.
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Affiliation(s)
- Kwanghoon Lee
- Department of Medicine, University of California San Diego, La Jolla, CA, USA
- Department of Medicine, Dongguk University Ilsan Hospital, Goyang, Korea
| | - Soheil Niku
- Nuclear Medicine Service, Jennifer Moreno VA San Diego Healthcare System, San Diego, CA, USA
| | - Sonya J Koo
- Department of Radiology, West Los Angeles VA Medical Center, Los Angeles, CA, USA
| | - Ernest Belezzuoli
- Nuclear Medicine Service, Jennifer Moreno VA San Diego Healthcare System, San Diego, CA, USA
- Department of Radiology, University of California San Diego, La Jolla, CA, USA
| | - Monica Guma
- Department of Medicine, University of California San Diego, La Jolla, CA, USA.
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Florea A, Mottaghy FM, Bauwens M. Molecular Imaging of Angiogenesis in Oncology: Current Preclinical and Clinical Status. Int J Mol Sci 2021; 22:5544. [PMID: 34073992 PMCID: PMC8197399 DOI: 10.3390/ijms22115544] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 05/17/2021] [Accepted: 05/20/2021] [Indexed: 12/11/2022] Open
Abstract
Angiogenesis is an active process, regulating new vessel growth, and is crucial for the survival and growth of tumours next to other complex factors in the tumour microenvironment. We present possible molecular imaging approaches for tumour vascularisation and vitality, focusing on radiopharmaceuticals (tracers). Molecular imaging in general has become an integrated part of cancer therapy, by bringing relevant insights on tumour angiogenic status. After a structured PubMed search, the resulting publication list was screened for oncology related publications in animals and humans, disregarding any cardiovascular findings. The tracers identified can be subdivided into direct targeting of angiogenesis (i.e., vascular endothelial growth factor, laminin, and fibronectin) and indirect targeting (i.e., glucose metabolism, hypoxia, and matrix metallo-proteases, PSMA). Presenting pre-clinical and clinical data of most tracers proposed in the literature, the indirect targeting agents are not 1:1 correlated with angiogenesis factors but do have a strong prognostic power in a clinical setting, while direct targeting agents show most potential and specificity for assessing tumour vascularisation and vitality. Within the direct agents, the combination of multiple targeting tracers into one agent (multimers) seems most promising. This review demonstrates the present clinical applicability of indirect agents, but also the need for more extensive research in the field of direct targeting of angiogenesis in oncology. Although there is currently no direct tracer that can be singled out, the RGD tracer family seems to show the highest potential therefore we expect one of them to enter the clinical routine.
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Affiliation(s)
- Alexandru Florea
- Department of Nuclear Medicine, University Hospital RWTH Aachen, 52074 Aachen, Germany; (A.F.); (M.B.)
- Department of Radiology and Nuclear Medicine, Maastricht University Medical Center, 6229HX Maastricht, The Netherlands
- School for Cardiovascular Diseases (CARIM), Maastricht University, 6229HX Maastricht, The Netherlands
| | - Felix M. Mottaghy
- Department of Nuclear Medicine, University Hospital RWTH Aachen, 52074 Aachen, Germany; (A.F.); (M.B.)
- Department of Radiology and Nuclear Medicine, Maastricht University Medical Center, 6229HX Maastricht, The Netherlands
- School for Cardiovascular Diseases (CARIM), Maastricht University, 6229HX Maastricht, The Netherlands
- School of Nutrition and Translational Research in Metabolism (NUTRIM), Maastricht University, 6229HX Maastricht, The Netherlands
| | - Matthias Bauwens
- Department of Nuclear Medicine, University Hospital RWTH Aachen, 52074 Aachen, Germany; (A.F.); (M.B.)
- Department of Radiology and Nuclear Medicine, Maastricht University Medical Center, 6229HX Maastricht, The Netherlands
- School of Nutrition and Translational Research in Metabolism (NUTRIM), Maastricht University, 6229HX Maastricht, The Netherlands
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Charlier E, Deroyer C, Neuville S, Plener Z, Malaise O, Ciregia F, Gillet P, Reuter G, Salvé M, Withofs N, Hustinx R, de Seny D, Malaise MG. Toward diagnostic relevance of the α Vβ 5, α Vβ 3, and α Vβ 6 integrins in OA: expression within human cartilage and spinal osteophytes. Bone Res 2020; 8:35. [PMID: 33083095 PMCID: PMC7527564 DOI: 10.1038/s41413-020-00110-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Revised: 05/06/2020] [Accepted: 06/08/2020] [Indexed: 12/14/2022] Open
Abstract
We previously reported 18FPRGD2 uptake by the coxofemoral lining, intervertebral discs and facet joint osteophytes in OA using PET/SCAN imaging. However, the molecular mechanism by which the PRGD2 tracer interacts with joint tissues and osteophytes in OA remains unclear. As PRGD2 ligands are expected to belong to the RGD-specific integrin family, the purpose of this study was (i) to determine which integrin complexes display the highest affinity for PRGD2-based ligands, (ii) to analyze integrin expression in relevant tissues, and (iii) to test integrin regulation in chondrocytes using OA-related stimuli to increase the levels of fibrosis and ossification markers. To this end, the affinity of PRGD2-based ligands for five heterodimeric integrins was measured by competition with 125I-echistatin. In situ analyses were performed in human normal vs. OA cartilage and spinal osteophytes. Osteophytes were characterized by (immuno-)histological staining. Integrin subunit expression was tested in chondrocytes undergoing dedifferentiation, osteogenic differentiation, and inflammatory stimulation. The integrins αVβ5, αVβ3, and αVβ6 presented the highest affinity for PRGD2-based ligands. In situ, the expression of these integrins was significantly increased in OA compared to normal cartilage. Within osteophytes, the mean integrin expression score was significantly higher in blood vessels, fibrous areas, and cells from the bone lining than in osteocytes and cartilaginous zones. In vitro, the levels of integrin subunits were significantly increased during chondrocyte dedifferentiation (except for β6), fibrosis, and osteogenic differentiation as well as under inflammatory stimuli. In conclusion, anatomical zones (such as OA cartilage, intervertebral discs, and facet joint osteophytes) previously reported to show PRGD2 ligand uptake in vivo expressed increased levels of αVβ5, αVβ3, and β6 integrins, whose subunits are modulated in vitro by OA-associated conditions that increase fibrosis, inflammation, and osteogenic differentiation. These results suggest that the increased levels of integrins in OA compared to normal tissues favor PRGD2 uptake and might explain the molecular mechanism of OA imaging using the PRGD2-based ligand PET/CT.
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Affiliation(s)
- Edith Charlier
- Laboratory of Rheumatology, GIGA-I3, CHULiège, ULiège, Liège, Belgium
| | - Céline Deroyer
- Laboratory of Rheumatology, GIGA-I3, CHULiège, ULiège, Liège, Belgium
| | - Sophie Neuville
- Laboratory of Rheumatology, GIGA-I3, CHULiège, ULiège, Liège, Belgium
| | - Zelda Plener
- Laboratory of Rheumatology, GIGA-I3, CHULiège, ULiège, Liège, Belgium
| | - Olivier Malaise
- Laboratory of Rheumatology, GIGA-I3, CHULiège, ULiège, Liège, Belgium
| | - Federica Ciregia
- Laboratory of Rheumatology, GIGA-I3, CHULiège, ULiège, Liège, Belgium
| | | | - Gilles Reuter
- Department of Neurosurgery, CHULiège, Liège, Belgium
| | - Mallory Salvé
- Department of Nuclear Medicine, CHULiège, Liège, Belgium
| | - Nadia Withofs
- Department of Nuclear Medicine, CHULiège, Liège, Belgium
| | - Roland Hustinx
- Department of Nuclear Medicine, CHULiège, Liège, Belgium
| | - Dominique de Seny
- Laboratory of Rheumatology, GIGA-I3, CHULiège, ULiège, Liège, Belgium
| | - Michel G. Malaise
- Laboratory of Rheumatology, GIGA-I3, CHULiège, ULiège, Liège, Belgium
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Charlier E, Deroyer C, Ciregia F, Malaise O, Neuville S, Plener Z, Malaise M, de Seny D. Chondrocyte dedifferentiation and osteoarthritis (OA). Biochem Pharmacol 2019; 165:49-65. [DOI: 10.1016/j.bcp.2019.02.036] [Citation(s) in RCA: 125] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Accepted: 02/28/2019] [Indexed: 02/08/2023]
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Ocak M, Beaino W, White A, Zeng D, Cai Z, Anderson CJ. 64Cu-Labeled Phosphonate Cross-Bridged Chelator Conjugates of c(RGDyK) for PET/CT Imaging of Osteolytic Bone Metastases. Cancer Biother Radiopharm 2018; 33:74-83. [PMID: 29634417 DOI: 10.1089/cbr.2017.2419] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
OBJECTIVE The goal of this research was to evaluate c(RGDyK) conjugated to phosphonate-based cross-bridged chelators using Cu-free click chemistry in the 4T1 mouse mammary tumor bone metastasis model in comparison with 64Cu-CB-TE2A-c(RGDyK), which previously showed selective binding to integrin αvβ3 on osteoclasts. EXPERIMENTAL Two phosphonate-based cross-bridged chelators (CB-TE1A1P and CB-TE1K1P) were conjugated to c(RGDyK) through bio-orthogonal strain-promoted alkyne-azide cycloaddition. In vitro and in vivo evaluation of the 64Cu-labeled TE1A1P-DBCO-c(RGDyK) (AP-c(RGDyK)), TE1K1P-PEG4-DBCO-c(RGDyK) (KP-c(RGDyK)), and CB-TE2A-c(RGDyK) were compared in the 4T1 mouse model of bone metastasis. The affinities of the unconjugated and chelator-c(RGDyK) analogs for αvβ3 integrin were determined using a competitive-binding assay. For in vivo evaluation, BALB/c mice were injected with 1 × 105 4T1/Luc cells in the left ventricle. Formation of metastases was monitored by bioluminescence imaging (BLI) followed by small-animal PET/CT 2 h postinjection of radiotracers. RESULTS The chelator-peptide conjugates showed similar affinity to integrin αvβ3, in the low nM range. PET imaging demonstrated a higher uptake in bones having metastases for all 64Cu-labeled c(RGDyK) analogs compared with bones in nontumor-bearing mice. The correlation between uptake of 64Cu-AP-c(RGDyK) and 64Cu-KP-c(RGDyK) in bones with metastases based on PET/CT imaging, and osteoclast number based on histomorphometry, was improved over the previously investigated 64Cu-CB-TE2A-c(RGDyK). CONCLUSION These data suggest that the phosphonate chelator conjugates of c(RDGyK) peptides are promising PET tracers suitable for imaging tumor-associated osteoclasts in bone metastases.
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Affiliation(s)
- Meltem Ocak
- 1 Department of Radiology, University of Pittsburgh , Pittsburgh, Pennsylvania
| | - Wissam Beaino
- 1 Department of Radiology, University of Pittsburgh , Pittsburgh, Pennsylvania
| | - Alexander White
- 1 Department of Radiology, University of Pittsburgh , Pittsburgh, Pennsylvania
| | - Dexing Zeng
- 1 Department of Radiology, University of Pittsburgh , Pittsburgh, Pennsylvania.,2 Department of Medicine, University of Pittsburgh , Pittsburgh, Pennsylvania
| | - Zhengxin Cai
- 1 Department of Radiology, University of Pittsburgh , Pittsburgh, Pennsylvania
| | - Carolyn J Anderson
- 1 Department of Radiology, University of Pittsburgh , Pittsburgh, Pennsylvania.,2 Department of Medicine, University of Pittsburgh , Pittsburgh, Pennsylvania.,3 Department of Pharmacology and Chemical Biology, University of Pittsburgh , Pittsburgh, Pennsylvania.,4 Department of Bioengineering, University of Pittsburgh , Pittsburgh, Pennsylvania
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Debordeaux F, Chansel-Debordeaux L, Pinaquy JB, Fernandez P, Schulz J. What about αvβ3 integrins in molecular imaging in oncology? Nucl Med Biol 2018; 62-63:31-46. [DOI: 10.1016/j.nucmedbio.2018.04.006] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Revised: 03/19/2018] [Accepted: 04/30/2018] [Indexed: 10/17/2022]
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Salvé M, Avohou HT, Monbaliu JCM, Lebrun P, Lemaire C, Damblon C, de Tullio P, Hubert P, Hustinx R, Luxen A. "NOTA-PRGD 2 and NODAGA-PRGD 2 : Bioconjugation, characterization, radiolabelling, and design space". J Labelled Comp Radiopharm 2018; 61:487-500. [PMID: 29430693 DOI: 10.1002/jlcr.3613] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Revised: 01/29/2018] [Accepted: 01/29/2018] [Indexed: 12/13/2022]
Abstract
This work reports on the development of amide bond bioconjugation for the production of -NOTA and -NODAGA PRGD2 using batch strategy and microfluidic reactor technology. The final radiolabelling step was fully optimized using Design of Experiments and Design Space approaches, hence targeting robust labelling yields in routine. Optimal labelling conditions were defined in sodium acetate buffer as 168 μg/mL peptide concentration, 4.9 pH, 47.5°C temperature, and 12.5-minute reaction time. Upon optimization, the Gallium-68 radiolabelling was fully automated. All the work was designed to be compliant to the GMP environment and to support the pharmaceutical scale-up.
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Affiliation(s)
- Mallory Salvé
- GIGA-CRC In VIVO Imaging, University of Liège, Liège, Belgium.,Nuclear Medicine and Oncological Imaging Division, CHU of Liege, Liège, Belgium
| | - Hermane T Avohou
- Center for Interdisciplinary Research on Medicines, University of Liège, Liège, Belgium
| | | | - Pierre Lebrun
- Pharmalex Statistical Solution, Mont-Saint-Guibert, Belgium
| | | | | | - Pascal de Tullio
- Center for Interdisciplinary Research on Medicines, University of Liège, Liège, Belgium
| | - Philippe Hubert
- Center for Interdisciplinary Research on Medicines, University of Liège, Liège, Belgium
| | - Roland Hustinx
- GIGA-CRC In VIVO Imaging, University of Liège, Liège, Belgium.,Nuclear Medicine and Oncological Imaging Division, CHU of Liege, Liège, Belgium
| | - André Luxen
- GIGA-CRC In VIVO Imaging, University of Liège, Liège, Belgium
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A First Report on [ 18F]FPRGD 2 PET/CT Imaging in Multiple Myeloma. CONTRAST MEDIA & MOLECULAR IMAGING 2017; 2017:6162845. [PMID: 29097930 PMCID: PMC5612716 DOI: 10.1155/2017/6162845] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/19/2017] [Revised: 05/15/2017] [Accepted: 06/13/2017] [Indexed: 11/18/2022]
Abstract
An observational study was set up to assess the feasibility of [18F]FPRGD2 PET/CT for imaging patients with multiple myeloma (MM) and to compare its detection rate with low dose CT alone and combined [18F]NaF/[18F]FDG PET/CT images. Four patients (2 newly diagnosed patients and 2 with relapsed MM) were included and underwent whole-body PET/CT after injection of [18F]FPRGD2. The obtained images were compared with results of low dose CT and already available results of a combined [18F]NaF/[18F]FDG PET/CT. In total, 81 focal lesions (FLs) were detected with PET/CT and an underlying bone destruction or fracture was seen in 72 (89%) or 8 (10%) FLs, respectively. Fewer FLs (54%) were detected by [18F]FPRGD2 PET/CT compared to low dose CT (98%) or [18F]NaF/[18F]FDG PET/CT (70%) and all FLs detected with [18F]FPRGD2 PET were associated with an underlying bone lesion. In one newly diagnosed patient, more [18F]FPRGD2 positive lesions were seen than [18F]NaF/[18F]FDG positive lesions. This study suggests that [18F]FPRGD2 PET/CT might be less useful for the detection of myeloma lesions in patients with advanced disease as all FLs with [18F]FPRGD2 uptake were already detected with CT alone.
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Insights on Molecular Mechanisms of Chondrocytes Death in Osteoarthritis. Int J Mol Sci 2016; 17:ijms17122146. [PMID: 27999417 PMCID: PMC5187946 DOI: 10.3390/ijms17122146] [Citation(s) in RCA: 228] [Impact Index Per Article: 28.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2016] [Revised: 12/05/2016] [Accepted: 12/12/2016] [Indexed: 12/21/2022] Open
Abstract
Osteoarthritis (OA) is a joint pathology characterized by progressive cartilage degradation. Medical care is mainly based on alleviating pain symptoms. Compelling studies report the presence of empty lacunae and hypocellularity in cartilage with aging and OA progression, suggesting that chondrocyte cell death occurs and participates to OA development. However, the relative contribution of apoptosis per se in OA pathogenesis appears complex to evaluate. Indeed, depending on technical approaches, OA stages, cartilage layers, animal models, as well as in vivo or in vitro experiments, the percentage of apoptosis and cell death types can vary. Apoptosis, chondroptosis, necrosis, and autophagic cell death are described in this review. The question of cell death causality in OA progression is also addressed, as well as the molecular pathways leading to cell death in response to the following inducers: Fas, Interleukin-1β (IL-1β), Tumor Necrosis factor-α (TNF-α), leptin, nitric oxide (NO) donors, and mechanical stresses. Furthermore, the protective role of autophagy in chondrocytes is highlighted, as well as its decline during OA progression, enhancing chondrocyte cell death; the transition being mainly controlled by HIF-1α/HIF-2α imbalance. Finally, we have considered whether interfering in chondrocyte apoptosis or promoting autophagy could constitute therapeutic strategies to impede OA progression.
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Withofs N, Hustinx R. Integrin αvβ3 and RGD-based radiopharmaceuticals. MEDECINE NUCLEAIRE-IMAGERIE FONCTIONNELLE ET METABOLIQUE 2016. [DOI: 10.1016/j.mednuc.2015.12.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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