المؤلفون: Julien Herman, Benoit Le Goff, Julien De Lima, Régis Brion, Catherine Chevalier, Frédéric Blanchard, Christelle Darrieutort-Laffite

المصدر: Arthritis Research & Therapy, Vol 23, Iss 1, Pp 1-11 (2021)

مصطلحات موضوعية: Apatite, Rotator cuff tendons, Interleukin-1, Inflammasome, Air pouch model, Diseases of the musculoskeletal system, RC925-935

الوصف: Abstract Background Calcific tendonitis of the rotator cuff is due to carbonated apatite deposits in the shoulder tendons. During the evolution of the disease, an acute inflammatory episode may occur leading to the disappearance of the calcification. Although hydroxyapatite crystal-induced inflammation has been previously studied with synthetic crystals, no data are available with calcifications extracted from patients suffering from calcific tendinopathy. The objective of the study was to explore the inflammatory properties of human calcifications and the pathways involved. Methods Human calcifications and synthetic hydroxyapatite were used in vitro to stimulate human monocytes and macrophages, the human myeloid cell line THP-1, and human tenocytes. The release of IL-1β, IL-6, and IL-8 by cells was quantified by ELISA. The gene expression of pro- and anti-inflammatory cytokines was evaluated by quantitative PCR. NF-kB activation and NLRP3 involvement were assessed in THP-1 cells using a NF-kB inhibitor and a caspase-1 inhibitor. The inflammatory properties were then assessed in vivo using a mouse air pouch model. Results Human calcifications were able to induce a significant release of IL-1β when incubated with monocytes, macrophages, and THP-1 only if they were first primed with LPS (monocytes and macrophages) or PMA (THP-1). Stimulation of THP-1 by human calcifications led to similar levels of IL-1β when compared to synthetic hydroxyapatite although these levels were significantly inferior in monocytes and macrophages. The patient’s crystals enhanced mRNA expression of pro-IL-1β, as well as IL-18, NF-kB, and TGFβ when IL-6 and TNFα expression were not. IL-1β production was reduced by the inhibition of caspase-1 indicating the role of NLRP3 inflammasome. In vivo, injection of human calcifications or synthetic hydroxyapatite in the air pouch led to a significant increase in membrane thickness although significant overexpression of IL-1β was only observed for synthetic hydroxyapatite. Conclusions As synthetic hydroxyapatite, human calcifications were able to induce an inflammatory response resulting in the production of IL-1β after NF-kB activation and through NLRP3 inflammasome. In some experiments, IL-1β induction was lower with human calcifications compared to synthetic apatite. Differences in size, shape, and protein content may explain this observation.

وصف الملف: electronic resource

العلاقة: https://doaj.org/toc/1478-6362Test

الوصول الحر: https://doaj.org/article/b19c7c275c67410ba2bb12dee497d5c3Test

المؤلفون: Christelle Darrieutort-Laffite, Catherine Ansquer, Hélène Aubert, Françoise Kraeber-Bodéré, Agathe Masseau, Christian Agard, Mohamed Hamidou, Claire Bernier, Jean-Marie Berthelot, Benoit Le Goff, Sébastien Barbarot, Antoine Néel

المصدر: Arthritis Research & Therapy, Vol 22, Iss 1, Pp 1-10 (2020)

مصطلحات موضوعية: Bone scan, Bone lesions, Interleukin 1 receptor antagonist, Schnitzler syndrome, Diseases of the musculoskeletal system, RC925-935

الوصف: Abstract Objective To report on the characteristics and long-term course of rheumatic manifestations in Schnitzler syndrome (SchS). Methods A retrospective cohort study of patients with SchS followed between 2000 and 2020. Inclusion criteria included a diagnosis of SchS (Strasbourg criteria). All available bone scans were reviewed and scored according to the intensity and number of pathological sites. The scintigraphic score was compared with the clinical activity score, CRP level, and treatments. Results Twenty-five patients were included. Median age at diagnosis was 68 years. Eighty patients (72%) had SchS-related rheumatic pain. Most patients had a long-standing isolated rash before constitutional and/or rheumatic symptoms appeared. The monoclonal component level was usually very low (IgMκ in 22/25). Rheumatic pain predominated around the knees. Bone scans revealed abnormal tracer uptake in 15/18 (85%). The scintigraphic score correlated with clinical activity (r = 0.4, p

وصف الملف: electronic resource

العلاقة: http://link.springer.com/article/10.1186/s13075-020-02318-5Test; https://doaj.org/toc/1478-6362Test

الوصول الحر: https://doaj.org/article/fabbff27aafb4999bfe695d9fd6de2a6Test

المؤلفون: Yves Maugars, Pascale Guillot, Joëlle Glémarec, Jean-Marie Berthelot, Benoit Le Goff, Christelle Darrieutort-Laffite

المصدر: Journal of Medical Case Reports, Vol 14, Iss 1, Pp 1-7 (2020)

مصطلحات موضوعية: Osteoporosis, Denosumab rebound, Fracture, Hypercalcemia, Hyperparathyroidism, Medicine

الوصف: Abstract Background The rebound effect after stopping treatment with denosumab may be associated with rapid loss of the gains in bone mineral density achieved with treatment, high levels of bone remodeling markers, the occurrence of vertebral fractures, and even hypercalcemia. Case presentation A 64-year-old osteoporotic Caucasian woman suffered from a fracture of her second lumbar vertebra in 2004. From January 2005, she was treated with denosumab for 9 years, with good densitometry results for her hip and lumbar areas, and no fractures over the last 6 years of treatment. Ten months after the treatment with denosumab was stopped, a cascade of vertebral fractures, including some in unusual locations (third thoracic vertebra), and multiple rib fractures in a context of hypercalcemia, suggested possible malignancy. A complete evaluation, including systemic, biological, and biopsy analyses, ruled out this hypothesis. The hypercalcemia was associated with normal plasma phosphate and vitamin D concentrations, and a high parathyroid hormone level, with an abnormal fixation of the lower lobe of the thyroid on sesta-methoxy-isobutyl-isonitrile scintigraphy. Histological analysis of the excised parathyroid tissue revealed hyperplasia. The associated thyroidectomy (goiter) led to the discovery of a thyroid papillary microcarcinoma. Conclusions We consider the consequences of this rebound effect, not only in terms of the major loss of bone density (return to basal values within 3 years) and the multiple disabling fracture episodes, but also in terms of the hypercalcemia observed in association with apparently autonomous tertiary hyperparathyroidism. Several cases of spontaneous reversion have been reported in children, but the intervention in our patient precluded any assessment of the possible natural course. The discovery of an associated thyroid neoplasm appears to be fortuitous. Better understanding of the various presentations of the rebound effect after stopping treatment with denosumab would improve diagnostic management of misleading forms, as in this case. Bisphosphonates could partially prevent this rebound effect.

وصف الملف: electronic resource

العلاقة: http://link.springer.com/article/10.1186/s13256-020-02401-0Test; https://doaj.org/toc/1752-1947Test

الوصول الحر: https://doaj.org/article/2aa7eb9965a0448c98dcb1d8a7eb6751Test

المؤلفون: Claire Bernier, Hélène Aubert, Jean-Marie Berthelot, Antoine Néel, Christian Agard, Sébastien Barbarot, Benoit Le Goff, Mohamed Hamidou, Agathe Masseau, Françoise Kraeber-Bodéré, Christelle Darrieutort-Laffite, Catherine Ansquer

المصدر: Arthritis Research & Therapy, Vol 22, Iss 1, Pp 1-10 (2020)
Arthritis Research & Therapy

مصطلحات موضوعية: Male, medicine.medical_specialty, lcsh:Diseases of the musculoskeletal system, Interleukin 1 receptor antagonist, Single Center, Cohort Studies, 030207 dermatology & venereal diseases, 03 medical and health sciences, 0302 clinical medicine, Schnitzler syndrome, Musculoskeletal Pain, Internal medicine, medicine, Humans, Bone pain, Retrospective Studies, business.industry, Waldenstrom macroglobulinemia, Retrospective cohort study, Bone scan, medicine.disease, Rash, Rheumatology, Bone lesions, Cohort, Female, medicine.symptom, lcsh:RC925-935, business, 030215 immunology, Research Article, Follow-Up Studies

الوصف: Objective To report on the characteristics and long-term course of rheumatic manifestations in Schnitzler syndrome (SchS). Methods A retrospective cohort study of patients with SchS followed between 2000 and 2020. Inclusion criteria included a diagnosis of SchS (Strasbourg criteria). All available bone scans were reviewed and scored according to the intensity and number of pathological sites. The scintigraphic score was compared with the clinical activity score, CRP level, and treatments. Results Twenty-five patients were included. Median age at diagnosis was 68 years. Eighty patients (72%) had SchS-related rheumatic pain. Most patients had a long-standing isolated rash before constitutional and/or rheumatic symptoms appeared. The monoclonal component level was usually very low (IgMκ in 22/25). Rheumatic pain predominated around the knees. Bone scans revealed abnormal tracer uptake in 15/18 (85%). The scintigraphic score correlated with clinical activity (r = 0.4, p r = 0.47, p p Conclusions Rheumatic manifestations are very prevalent in SchS. However, bone pain can be misleading and contribute to misdiagnosis. Bone scan abnormalities are very prevalent and correlate with disease activity and treatments. IL1-Ra has a dramatic and durable efficacy but may not be required in every patient early on.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::52bd4540be4dcd843b01445f9f1276c5Test
http://link.springer.com/article/10.1186/s13075-020-02318-5Test