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Pérez-Castrillón JL, Dueñas-Laita A, Gómez-Alonso C, Jódar E, Del Pino-Montes J, Brandi ML, Cereto Castro F, Quesada-Gómez JM, Gallego López L, Olmos Martínez JM, Alhambra Expósito MR, Galarraga B, González-Macías J, Neyro JL, Bouillon R, Hernández-Herrero G, Fernández-Hernando N, Chinchilla SP. Long-Term Treatment and Effect of Discontinuation of Calcifediol in Postmenopausal Women with Vitamin D Deficiency: A Randomized Trial. J Bone Miner Res 2023; 38:471-479. [PMID: 36661855 DOI: 10.1002/jbmr.4776] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 12/22/2022] [Accepted: 01/15/2023] [Indexed: 01/21/2023]
Abstract
Vitamin D plays a major role in bone health and probably also in multiple extraskeletal acute and chronic diseases. Although supplementation with calcifediol, a vitamin D metabolite, has demonstrated efficacy and safety in short-term clinical trials, its effects after long-term monthly administration have been studied less extensively. This report describes the results of a 1-year, phase III-IV, double-blind, randomized, controlled, parallel, multicenter superiority clinical trial to assess the efficacy and safety of monthly calcifediol 0.266 mg versus cholecalciferol 25,000 IU (0.625 mg) in postmenopausal women with vitamin D deficiency (25(OH)D < 20 ng/mL). A total of 303 women were randomized and 298 evaluated. Patients were randomized 1:1:1 to calcifediol 0.266 mg/month for 12 months (Group A1), calcifediol 0.266 mg/month for 4 months followed by placebo for 8 months (Group A2), and cholecalciferol 25,000 IU/month (0.625 mg/month) for 12 months (Group B). By month 4, stable 25(OH)D levels were documented with both calcifediol and cholecalciferol (intention-to-treat population): 26.8 ± 8.5 ng/mL (Group A1) and 23.1 ± 5.4 ng/mL (Group B). By month 12, 25(OH)D levels were 23.9 ± 8.0 ng/mL (Group A1) and 22.4 ± 5.5 ng/mL (Group B). When calcifediol treatment was withdrawn in Group A2, 25(OH)D levels decreased to baseline levels (28.5 ± 8.7 ng/mL at month 4 versus 14.4 ± 6.0 ng/mL at month 12). No relevant treatment-related safety issues were reported in any of the groups. The results confirm that long-term treatment with monthly calcifediol in vitamin D-deficient patients is effective and safe. The withdrawal of treatment leads to a pronounced decrease of 25(OH)D levels. Calcifediol presented a faster onset of action compared to monthly cholecalciferol. Long-term treatment produces stable and sustained 25(OH)D concentrations with no associated safety concerns. © 2023 Faes Farma SA. Journal of Bone and Mineral Research published by Wiley Periodicals LLC on behalf of American Society for Bone and Mineral Research (ASBMR).
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Affiliation(s)
- José Luis Pérez-Castrillón
- Department of Internal Medicine, Hospital Universitario Río Hortega, Valladolid, Spain
- School of Medicine, Universidad de Valladolid, Valladolid, Spain
| | - Antonio Dueñas-Laita
- School of Medicine, Universidad de Valladolid, Valladolid, Spain
- Clinical Toxicology Unit, Hospital Universitario Río Hortega, Valladolid, Spain
| | - Carlos Gómez-Alonso
- Bone Metabolism Unit, Hospital Universitario Central de Asturias - ISPA, Oviedo, Spain
| | - Esteban Jódar
- Department of Endocrinology & Clinical Nutrition, Hospital Universitario Quironsalud Madrid, Madrid, Spain
- School of Health Sciences, Universidad Europea, Madrid, Spain
| | - Javier Del Pino-Montes
- School of Medicine, Universidad de Salamanca, Salamanca, Spain
- Department of Rheumatology, Hospital Universitario de Salamanca, Salamanca, Spain
| | - Maria Luisa Brandi
- FIRMO Foundation (Fondazione Italiana Ricerca sulle Malattie dell'Osso), Florence, Italy
| | | | - José Manuel Quesada-Gómez
- Physiopathology of Endocrine Vitamin D System Biotechnology and Aging, Instituto Maimónides de Investigación Biomédica de Córdoba (IMIBIC), Córdoba, Spain
- Endocrinology and Nutrition Unit, Hospital Universitario Reina Sofía, Córdoba, Spain
| | - Laura Gallego López
- Department of Internal Medicine, Hospital Universitario Virgen Macarena, Seville, Spain
| | - José Manuel Olmos Martínez
- Internal Medicine Department, Hospital Universitario Marqués de Valdecilla, Santander, Spain
- School of Medicine, Universidad de Cantabria, Santander, Spain
- Infection and Immunity Area, Instituto de Investigación Marqués de Valdecilla (IDIVAL), Santander, Spain
| | - María Rosa Alhambra Expósito
- Physiopathology of Endocrine Vitamin D System Biotechnology and Aging, Instituto Maimónides de Investigación Biomédica de Córdoba (IMIBIC), Córdoba, Spain
- Endocrinology and Nutrition Unit, Hospital Universitario Reina Sofía, Córdoba, Spain
| | - Bernat Galarraga
- Department of Rheumatology, Hospital Quirónsalud Bizkaia, Erandio, Spain
- Department of Medicine, University of the Basque Country, Leioa, Spain
| | - Jesús González-Macías
- School of Medicine, Universidad de Cantabria, Santander, Spain
- Infection and Immunity Area, Instituto de Investigación Marqués de Valdecilla (IDIVAL), Santander, Spain
| | - José Luis Neyro
- Gynecology and Obstetrics Service, Hospital Universitario Cruces, Barakaldo, Spain
- International Master on Climacteric and Menopause, Universidad de Madrid (UDIMA), Madrid, Spain
| | - Roger Bouillon
- Department of Chronic Diseases and Metabolism, KU Leuven, Leuven, Belgium
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Pérez-Castrillón JL, Dueñas-Laita A, Gómez-Alonso C, Bouillon R, Jódar E, Brandi ML, González-Macías J, Quesada-Gómez JM, Olmos Martínez JM, Galarraga B, Del Pino-Montes J, Alhambra Expósito MR, Cereto Castro F, Gallego López L, Hernández-Herrero G, Fernández-Hernando N, Arranz-Gutiérrez P, Chinchilla SP. Reply to Calcifediol Is Not Superior to Cholecalciferol in Improving Vitamin D Status in Postmenopausal Women. J Bone Miner Res 2022; 37:1413-1415. [PMID: 35607257 DOI: 10.1002/jbmr.4612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Revised: 05/17/2022] [Accepted: 05/19/2022] [Indexed: 11/08/2022]
Affiliation(s)
- José Luis Pérez-Castrillón
- Internal Medicine Department, Hospital Universitario Río Hortega, Valladolid, Spain.,School of Medicine, Universidad de Valladolid, Valladolid, Spain
| | - Antonio Dueñas-Laita
- School of Medicine, Universidad de Valladolid, Valladolid, Spain.,Clinical Toxicology Unit, Hospital Universitario Río Hortega, Valladolid, Spain
| | - Carlos Gómez-Alonso
- Bone Metabolism Unit, Hospital Universitario Central de Asturias-Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Oviedo, Spain
| | - Roger Bouillon
- Department of Chronic Diseases and Metabolism, Katholieke Universiteit (KU) Leuven, Leuven, Belgium
| | - Esteban Jódar
- Department of Endocrinology & Clinical Nutrition, Hospital Universitario Universitario Quironsalud Madrid, Madrid, Spain.,School of Health Sciences, Universidad Europea, Madrid, Spain
| | - Maria Luisa Brandi
- Dipartimento di Scienze Biomediche, Sperimentali e Cliniche "Mario Serio", Università degli Studi di Firenze, Florence, Italy
| | - Jesús González-Macías
- Instituto de Investigación Marqués de Valdecilla - Instituto de Investigación Marqués de Valdecilla (IDIVAL), Santander, Spain.,School of Medicine, Universidad de Cantabria, Santander, Spain
| | - José Manuel Quesada-Gómez
- Instituto Maimónides de Investigación Biomédica de Córdoba (IMIBIC), Córdoba, Spain.,Hospital Universitario Reina Sofía, Córdoba, Spain
| | - José Manuel Olmos Martínez
- School of Medicine, Universidad de Cantabria, Santander, Spain.,Internal Medicine Department, Hospital Universitario Marqués de Valdecilla-Instituto de Investigación Marqués de Valdecilla (IDIVAL), Santander, Spain
| | - Bernat Galarraga
- Rheumatology Department, Hospital Quirónsalud Bizkaia, Erandio, Spain
| | | | - María Rosa Alhambra Expósito
- Instituto Maimónides de Investigación Biomédica de Córdoba (IMIBIC), Córdoba, Spain.,Endocrinology and Nutrition Unit, Hospital Universitario Reina Sofía, Córdoba, Spain
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Pérez-Castrillón JL, Dueñas-Laita A, Brandi ML, Jódar E, Del Pino-Montes J, Quesada-Gómez JM, Cereto Castro F, Gómez-Alonso C, Gallego López L, Olmos Martínez JM, Alhambra Expósito MR, Galarraga B, González-Macías J, Bouillon R, Hernández-Herrero G, Fernández-Hernando N, Arranz-Gutiérrez P, Chinchilla SP. Calcifediol is superior to cholecalciferol in improving vitamin D status in postmenopausal women: a randomized trial. J Bone Miner Res 2021; 36:1967-1978. [PMID: 34101900 PMCID: PMC8597097 DOI: 10.1002/jbmr.4387] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 05/31/2021] [Accepted: 06/02/2021] [Indexed: 12/19/2022]
Abstract
Vitamin D has shown to play a role in multiple diseases due to its skeletal and extraskeletal actions. Furthermore, vitamin D deficiency has become a worldwide health issue. Few supplementation guidelines mention calcifediol treatment, despite being the direct precursor of calcitriol and the biomarker of vitamin D status. This 1-year, phase III-IV, double-blind, randomized, controlled, multicenter clinical trial assessed the efficacy and safety of calcifediol 0.266 mg soft capsules in vitamin D-deficient postmenopausal women, compared to cholecalciferol. Results reported here are from a prespecified interim analysis, for the evaluation of the study's primary endpoint: the percentage of patients with serum 25-hydroxyvitamin D (25(OH)D) levels above 30 ng/ml after 4 months. A total of 303 patients were enrolled, of whom 298 were included in the intention-to-treat (ITT) population. Patients with baseline levels of serum 25(OH)D <20 ng/ml were randomized 1:1:1 to calcifediol 0.266 mg/month for 12 months, calcifediol 0.266 mg/month for 4 months followed by placebo for 8 months, and cholecalciferol 25,000 IU/month for 12 months. At month 4, 35.0% of postmenopausal women treated with calcifediol and 8.2% of those treated with cholecalciferol reached serum 25(OH)D levels above 30 ng/ml (p < 0.0001). The most remarkable difference between both drugs in terms of mean change in serum 25(OH)D levels was observed after the first month of treatment (mean ± standard deviation change = 9.7 ± 6.7 and 5.1 ± 3.5 ng/ml in patients treated with calcifediol and cholecalciferol, respectively). No relevant treatment-related safety issues were reported in any of the groups studied. These results thus confirm that calcifediol is effective, faster, and more potent than cholecalciferol in raising serum 25(OH)D levels and is a valuable option for the treatment of vitamin D deficiency. © 2021 The Authors. Journal of Bone and Mineral Research published by Wiley Periodicals LLC on behalf of American Society for Bone and Mineral Research (ASBMR).
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Affiliation(s)
- José Luis Pérez-Castrillón
- Internal Medicine Department, Hospital Universitario Río Hortega, Valladolid, Spain.,School of Medicine, Universidad de Valladolid, Valladolid, Spain
| | - Antonio Dueñas-Laita
- School of Medicine, Universidad de Valladolid, Valladolid, Spain.,Clinical Toxicology Unit, Hospital Universitario Río Hortega, Valladolid, Spain
| | - Maria Luisa Brandi
- Dipartimento di Scienze Biomediche, Sperimentali e Cliniche "Mario Serio", Università degli Studi di Firenze, Florence, Italy
| | - Esteban Jódar
- Department of Endocrinology & Clinical Nutrition, Hospital Universitario Universitario Quironsalud Madrid, Madrid, Spain.,School of Health Sciences, Universidad Europea, Madrid, Spain
| | - Javier Del Pino-Montes
- School of Medicine, Universidad de Salamanca, Salamanca, Spain.,Rheumatology Department, Hospital Universitario de Salamanca, Salamanca, Spain
| | - José Manuel Quesada-Gómez
- Instituto Maimónides de Investigación Biomédica de Córdoba (IMIBIC), Córdoba, Spain.,Hospital Universitario Reina Sofía, Córdoba, Spain
| | | | - Carlos Gómez-Alonso
- Bone Metabolism Unit, Hospital Universitario Central de Asturias - ISPA, Oviedo, Spain
| | | | - José Manuel Olmos Martínez
- Internal Medicine Department, Hospital Universitario Marqués de Valdecilla - IDIVAL, Santander, Spain.,School of Medicine, Universidad de Cantabria, Santander, Spain
| | - María Rosa Alhambra Expósito
- Instituto Maimónides de Investigación Biomédica de Córdoba (IMIBIC), Córdoba, Spain.,Endocrinology and Nutrition Unit Hospital Universitario Reina Sofía, Córdoba, Spain
| | - Bernat Galarraga
- Rheumatology Department, Hospital Quirónsalud Bizkaia, Erandio, Spain
| | - Jesús González-Macías
- School of Medicine, Universidad de Cantabria, Santander, Spain.,Instituto de Investigación marqués de Valdecilla (IDIVAL), Santander, Spain
| | - Roger Bouillon
- Department of Chronic Diseases and Metabolism, KU Leuven, Leuven, Belgium
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Galarraga B, McSwiggan S, Caswell FR, Brodie RC, Sharma P, Abel EW, Newton DJ, Belch JJF. A novel approach to measuring skin elasticity in systemic sclerosis: results from a pilot study. Scand J Rheumatol 2011; 40:211-6. [PMID: 21231806 DOI: 10.3109/03009742.2010.530610] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVES Systemic sclerosis (SSc) is characterized by progressive fibrosis of various organs, and causes hard, tethered, and inelastic skin. The modified Rodnan score is used to quantify skin involvement, but this method is subjective and user dependent. The aim of this study was to test the ability of a new skin torsion device to measure skin elasticity in patients with SSc. METHODS The study included 16 female SSc patients and 58 healthy controls. Skin elasticity was assessed on the forearms and backs of the hands using a new hand-held device that gently rotates the skin for 15 s to a maximum of 40 deg, and measures the speed of rotation and the angle of rotation at 15 s. Total and localized modified Rodnan scores were also documented. RESULTS Measurements produced by the skin torsion device had good intra-subject reproducibility, particularly in the control group. The SSc patients had significantly lower skin elasticity than an age-matched subgroup of control subjects, as determined by the median speed of rotation of the device in the hands (1.91 vs. 2.60 deg/s, p < 0.0001) and forearms (1.84 vs. 2.46 deg/s, p < 0.0001), and the rotation at 15 s in the hands (28.6 vs. 39.0 deg, p < 0.0001) and forearms (27.6 vs. 36.9 deg, p < 0.0001). The presence of SSc disease was the only independent predictor of skin elasticity. CONCLUSIONS This pilot study has shown the potential value of a new skin torsion device to assess skin involvement in patients with SSc.
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Affiliation(s)
- B Galarraga
- Vascular and Inflammatory Diseases Research Unit, The Institute of Cardiovascular Research, Dundee, UK
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Galarraga B, Belch JJF, Pullar T, Ogston S, Khan F. Clinical improvement in rheumatoid arthritis is associated with healthier microvascular function in patients who respond to antirheumatic therapy. J Rheumatol 2010; 37:521-8. [PMID: 20080919 DOI: 10.3899/jrheum.090417] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
OBJECTIVE Rheumatoid arthritis (RA) is associated with increased cardiovascular (CV) mortality. Microvascular endothelial dysfunction occurs early in the development of CV disease and is worsened by inflammation. The effect of drug treatment for RA on microvascular function has been poorly studied. We assessed the effect of antirheumatic treatment on microvascular endothelial function in patients with RA, particularly to examine responders versus nonresponders to therapy. METHODS Fifty-one patients with active RA and no previous history of CV disease were assessed at baseline and after 2 and 4 months' therapy with either anti-tumor necrosis factor-alpha drugs (etanercept, n = 27, adalimumab, n = 3) or methotrexate, n = 21. RA disease activity, inflammatory measures, and skin microvascular responses, measured using laser Doppler imaging after iontophoretic delivery of acetylcholine (ACh) and sodium nitroprusside (SNP), were assessed at each study visit. RESULTS Disease Activity Score (DAS28) decreased significantly from baseline to visit 2 and 3 (6.04 +/- 1.2, 4.34 +/- 1.3, 4 +/- 1.3, respectively; p < 0.0001). Endothelium-dependent (ACh) and independent (SNP) responses for the whole cohort did not improve significantly after drug treatment (p = 0.250, p = 0.062, respectively). When patients who responded to antirheumatic therapy (n = 31) were analyzed, there were significant improvements in both ACh (p = 0.028) and SNP responses (p = 0.019). CONCLUSION Microvascular endothelial function improves in patients who respond to antirheumatic therapy. These results support the importance of effective therapy for RA patients in terms of CV effects, which might extrapolate to reduced CV events in the future. Clinical trial registration no. ISRCTN57761809.
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Affiliation(s)
- Bernat Galarraga
- Vascular and Inflammatory Diseases Research Unit, Centre for Cardiovascular and Lung Biology, Division of Medical Sciences, Ninewells Hospital and Medical School, Dundee, DD1 9SY, Scotland
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Galarraga B, Khan F, Kumar P, Pullar T, Belch JJF. Etanercept improves inflammation-associated arterial stiffness in rheumatoid arthritis. Rheumatology (Oxford) 2009; 48:1418-23. [DOI: 10.1093/rheumatology/kep251] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Galarraga B, Khan F, Kumar P, Pullar T, Belch JJF. C-reactive protein: the underlying cause of microvascular dysfunction in rheumatoid arthritis. Rheumatology (Oxford) 2008; 47:1780-4. [DOI: 10.1093/rheumatology/ken386] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
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9
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Galarraga B, Ho M, Youssef HM, Hill A, McMahon H, Hall C, Ogston S, Nuki G, Belch JJF. Cod liver oil (n-3 fatty acids) as an non-steroidal anti-inflammatory drug sparing agent in rheumatoid arthritis. Rheumatology (Oxford) 2008; 47:665-9. [PMID: 18362100 DOI: 10.1093/rheumatology/ken024] [Citation(s) in RCA: 93] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVES Dose-dependant gastrointestinal and cardiovascular side-effects limit the use of NSAIDs in the management of RA. The n-3 essential fatty acids (EFAs) have previously demonstrated some anti-inflammatory and NSAID-sparing properties. The objective of this study was to determine whether cod liver oil supplementation helps reduce daily NSAID requirement of patients with RA. METHODS Dual-centre, double-blind placebo-controlled randomized study of 9 months' duration. Ninety-seven patients with RA were randomized to take either 10 g of cod liver oil containing 2.2 g of n-3 EFAs or air-filled identical placebo capsules. Documentation of NSAID daily requirement, clinical and laboratory parameters of RA disease activity and safety checks were done at 0, 4, 12, 24 and 36 weeks. At 12 weeks, patients were instructed to gradually reduce, and if possible, stop their NSAID intake. Relative reduction of daily NSAID requirement by >30% after 9 months was the primary outcome measure. RESULTS Fifty-eight patients (60%) completed the study. Out of 49 patients 19 (39%) in the cod liver oil group and out of 48 patients 5 (10%) in the placebo group were able to reduce their daily NSAID requirement by >30% (P = 0.002, chi-squared test). No differences between the groups were observed in the clinical parameters of RA disease activity or in the side-effects observed. CONCLUSIONS This study suggests that cod liver oil supplements containing n-3 fatty acids can be used as NSAID-sparing agents in RA patients.
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Affiliation(s)
- B Galarraga
- Vascular and Inflammatory Diseases Research Unit, University Division of Medicine and Therapeutics, Ninewells Hospital and Medical School, Dundee DD1 9SY, UK.
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McLaren M, Waring A, Galarraga B, Rudd A, Morley K, Belch JJF. Investigation of platelet glycoprotein IIIa polymorphism using flow cytometry in patients with rheumatoid arthritis. Scand J Rheumatol 2006; 34:437-40. [PMID: 16393764 DOI: 10.1080/03009740510026607] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
OBJECTIVES Previous work has shown that the human platelet antigen (HPA) 1b polymorphism of platelet glycoprotein IIIa (GPIIIa) is implicated in the development of ischaemic vascular disease. HPA1b positive platelets have a lower threshold for activation and may exert a greater thrombotic tendency than those without the 1b allele. However, platelets heterozygous for the polymorphism are also more sensitive to aspirin than those homozygous for the 1b allele, which have a similar sensitivity to those without the 1b allele. A flow cytometric method has become available to identify this polymorphism. The aim of our study was to evaluate the use of this assay in patients with rheumatoid arthritis (RA) and to determine the incidence of the 1b allele in these patients. We also compared platelet aggregation and platelet/white blood cell interaction in patients with or without this polymorphism. METHODS We enrolled 99 patients and measured platelet aggregation in whole blood and platelet-rich plasma (prp), platelet/white blood cell interaction and C-reactive protein (CRP). RESULTS Thirty-four of the 99 patients were unsuitable for analysis because their baseline expression of GPIIIa was outwith the normal range, making the results outwith the limits of the flow cytometric method. The incidence of the 1b allele in the patients was 29%, with incidence being higher in females, although this failed to reach statistical significance. The number of circulating platelet aggregates and adenosine diphosphate (ADP)-induced aggregation in prp was significantly higher in those patients with the 1b allele. CONCLUSIONS This method may be of use as an initial screening test.
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Affiliation(s)
- M McLaren
- Vascular Diseases Research Unit, The Institute of Cardiovascular Research, Department of Medicine, Ninewells Hospital and Medical School, Dundee, Scotland, UK.
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Galarraga B, Sinclair D, Fahie-Wilson MN, McCrae FC, Hull RG, Ledingham JM. A rare but important cause for a raised serum creatine kinase concentration: two case reports and a literature review. Rheumatology (Oxford) 2003; 42:186-8. [PMID: 12509637 DOI: 10.1093/rheumatology/keg039] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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