To assess the reporting quality of interventions aiming at promoting physical activity (PA) using a wearable activity tracker (WAT) in patients with inflammatory arthritis (IA) or hip/knee... Show moreTo assess the reporting quality of interventions aiming at promoting physical activity (PA) using a wearable activity tracker (WAT) in patients with inflammatory arthritis (IA) or hip/knee osteoarthritis (OA). A systematic search was performed in eight databases (including PubMed, Embase and Cochrane Library) for studies published between 2000 and 2022. Two reviewers independently selected studies and extracted data on study characteristics and the reporting of the PA intervention using a WAT using the Consensus on Exercise Reporting Template (CERT) (12 items) and Consolidated Standards of Reporting Trials (CONSORT) E-Health checklist (16 items). The reporting quality of each study was expressed as a percentage of reported items of the total CERT and CONSORT E-Health (50% or less = poor; 51-79% = moderate; and 80-100% = good reporting quality). Sixteen studies were included; three involved patients with IA and 13 with OA. Reporting quality was poor in 6/16 studies and moderate in 10/16 studies, according to the CERT and poor in 8/16 and moderate in 8/16 studies following the CONSORT E-Health checklist. Poorly reported checklist items included: the description of decision rule(s) for determining progression and the starting level, the number of adverse events and how adherence or fidelity was assessed. In clinical trials on PA interventions using a WAT in patients with IA or OA, the reporting quality of delivery process is moderate to poor. The poor reporting quality of the progression and tailoring of the PA programs makes replication difficult. Improvements in reporting quality are necessary. Show less
The studies described in this thesis provides the field with valuable data on the potential therapeutic effects of fatty acids and specialized pro-resolving lipid mediators in rheumatoid arthritis... Show moreThe studies described in this thesis provides the field with valuable data on the potential therapeutic effects of fatty acids and specialized pro-resolving lipid mediators in rheumatoid arthritis and osteoarthritis. The omega-6 fatty acid AdA shows potent pro-resolving effects on the production of pro-inflammatory chemoattractantLTB4 with great promise to limit RA disease progression. In contrast to the promising potential therapeutic effects of AdA in RA, the evidence for pro-resolving effects in OA is still scarce. The results of the studies from this thesis show that neither LXA4, LXB4, RvE2 or Mar-1 were able to reduce OA disease activity in the experimental set-up we used. Finally, the studies described in this thesis show the utmost critical importance of the right sample preparation and storage for the intended subsequent analysis. Show less
Li, R.; Boer, C.G.; Oei, L.; Medina-Gomez, C. 2021
Purpose of the review The human gut harbors a complex community of microbes that influence many processes regulating musculoskeletal development and homeostasis. This review gives an update on the... Show morePurpose of the review The human gut harbors a complex community of microbes that influence many processes regulating musculoskeletal development and homeostasis. This review gives an update on the current knowledge surrounding the impact of the gut microbiota on musculoskeletal health, with an emphasis on research conducted over the last three years. Recent findings The gut microbiota and their metabolites are associated with sarcopenia, osteoporosis, osteoarthritis, and rheumatoid arthritis. The field is moving fast from describing simple correlations to pursue establishing causation through clinical trials. The gut microbiota and their microbial-synthesized metabolites hold promise for offering new potential alternatives for the prevention and treatment of musculoskeletal diseases given its malleability and response to environmental stimuli. Show less
Jonasdottir, H.S.; Brouwers, H.; Kwekkeboom, J.C.; Linden, H.M.J. van der; Huizinga, T.; Kloppenburg, M.; ... ; Ioan-Facsinay, A. 2017
This thesis investigates the role of adipose tissue inflammation in joint diseases such as osteoarthritis (OA) and rheumatoid arthritis (RA) . In the first part, we show that baseline levels of... Show moreThis thesis investigates the role of adipose tissue inflammation in joint diseases such as osteoarthritis (OA) and rheumatoid arthritis (RA) . In the first part, we show that baseline levels of circulating adiponectin can predict radiographic progression in patients with early RA. In contrast, in patients with hand OA, this association appears protective. Therefore, to obtain insight into the mechanisms underlying these associations, we investigated the high-molecular-weight isoform of adiponectin (hmwAPN), which is one of the most biologically active isoforms of adiponectin. We show that the associations of total adiponectin with radiographic progression are not mediated by hmwAPN, in either RA or HOA. In the second part, we present the immunological characterization of the infrapatellar fat pad (IFP), a joint associated adipose tissue, in patients with advanced knee OA. We observed profound differences in secreted inflammatory factors and immune cell composition between the IFP and paired subcutaneous adipose tissue samples. Interestingly, we observed obesity-related changes in the IFP phenotype, and in macrophages and adipocytes, Therefore, we investigated the modulatory effects of adipocytes on the phenotype of human macrophages in vitro and we observed that adipocyte-derived lipids can mediate the obesity-related changes in the phenotype of adipose tissue macrophages in humans Show less
This dissertation describes a new model in which cartilage degradation can be studied. New cartilage is formed by bovine chondrocytes obtained from the slaughterhouse and cocultured with synovial... Show moreThis dissertation describes a new model in which cartilage degradation can be studied. New cartilage is formed by bovine chondrocytes obtained from the slaughterhouse and cocultured with synovial cells from rheumatoid arthritis (RA) patients to study the interaction between the chondrocytes and synoviocytes.The results of our study show that the role of synoviocytes in cartilage degradation is dependent on the presence of live chondrocytes. In osteoarthritis (OA) patients an increased level of advanced glycation endproducts (AGEs), which can bind to the receptor for AGEs (RAGE), is found in the cartilage. In RA patients, increased levels of AGEs and other RAGE-binding proteins is found in serum, synovial tissue and –fluid. We therefore studied the effect of RAGE activation on chondrocytes and synoviocytes from OA and RA patients and found that both chondrocytes and synoviocytes become more active and start to degrade cartilage. Blockade of RAGE activation might therefore be an interesting target in treatment of OA and RA patients. The synoviocytes in RA synovial tissue have an altered, aggressive phenotype and can degrade cartilage. Hereby, they share properties of fibrotic/tumorigenic cells. We found that healthy synoviocytes are epithelial-like cells and that synovial fluid from RA patients will induce a change in phenotype and production of proteins found in fibrotic/tumorigenic cells. BMP-7, a protein able to induce cartilage production by chondrocytes, is able to inhibit this change in phenotype and might therefore be an interesting target to prevent the alteration of synoviocyte phenotype. Show less
