IgA anti-ß2 glycoprotein I antibodies: Experience from a large center.

OBJECTIVE: IgG and IgM antibodies directed at ß2-glycoprotein I are included in the classification criteria for the antiphospholipid syndrome (APS) while the IgA antibodies against ß2-glycoprotein I (IgA aß2GPI) are not. Conflicting data about the significance of IgA aß2GPI and APS manifestation can be found and more studies are necessary in order to define the diagnostic value of IgA aß2GPI. In the present article, we investigated the possible role of IgA aß2GPI as marker of APS. METHODS: A cohort of 314 patients with APS and systemic autoimmune disease was investigated for the presence of IgA aß2GPI and its association with clinical manifestation of APS. RESULTS: Eighty-nine patients presented IgA aß2GPI, 68 cases associated with others antiphospholipid antibodies (aPL) and in 21 cases being the only aPL present. In primary APS IgA aß2GPI are highly coincidental with other aPL (92,2%) while most of the isolated IgA aß2GPI were present in the SLE group (16/21). No association between IgA aß2GPI and APS manifestations: thrombosis and pregnancy morbidity was found, while a positive association between IgA aß2GPI and the presence of anti-nDNA, anti-RNP, anti-Sm, anti-SSA, anti-SSB antibodies was encountered. CONCLUSION: Our study does not show association between IgA aß2GPI and APS manifestations and does not support the inclusion of IgA aß2GPI as a classification criteria for APS.

Informed consent in clinical research; Do patients understand what they have signed?

Informed consent is an essential element of research, and signing this document is required to conduct most clinical trials. Its aim is to inform patients what their participation in the study will involve. However, increasingly, their complexity and length are making them difficult to understand, which might lead patients to give their authorization without having read them previously or without having understood what is stated. In this sense, the Ethics Committees for Clinical Research, and Pharmacists specialized in Hospital Pharmacy and Primary Care in their capacity as members of said committees, play an important and difficult role in defending the rights of patients. These Committees will review thoroughly these documents to guarantee that all legal requirements have been met and, at the same time, that they are easy to understand by the potential participants in a clinical trial.

El consentimiento informado es una parte esencial de la investigación y su firma es imprescindible para llevar a cabo la mayor parte de los estudios clínicos. Su fin es poner en conocimiento del paciente lo que implica su participación en el estudio que se le propone. Sin embargo, cada vez más, su complejidad y extensión los hacen difícilmente comprensibles, por lo que se corre el riesgo de que el paciente dé su autorización sin haberlo leído previamente o sin haber entendido lo que en él se le expone. En este sentido, los comités éticos de investigación clínica y los farmacéuticos, especialistas en farmacia hospitalaria y atención primaria como parte integrante de los mismos, cumplen un importante y difícil papel en la defensa de los derechos de los pacientes. En ellos se revisan exhaustivamente estos documentos para garantizar que todos los requisitos que exige la normativa estén contemplados y, al mismo tiempo, que sean de fácil comprensión para los potenciales participantes en un estudio.

Morbidity and mortality in systemic lupus erythematosus during a 10-year period: a comparison of early and late manifestations in a cohort of 1,000 patients.

In the present study, we assessed the frequency and characteristics of the main causes of morbidity and mortality in systemic lupus erythematosus (SLE) during a 10-year period and compared the frequency of early manifestations with those that appeared later in the evolution of the disease. In 1990, we started a multicenter study of 1,000 patients from 7 European countries. All had medical histories documented and underwent medical interview and routine general physical examination when entered in the study, and all were followed prospectively by the same physicians during the ensuing 10 years (1990-2000).A total of 481 (48.1%) patients presented 1 or more episodes of arthritis at any time during the 10 years, 311 (31.1%) patients had malar rash, 279 (27.9%) active nephropathy, 194 (19.4%) neurologic involvement, 166 (16.6%) fever, 163 (16.3%) Raynaud phenomenon, 160 (16.0%) serositis (pleuritis and/or pericarditis), 134 (13.4%) thrombocytopenia, and 92 (9.2%) thrombosis. When the prevalences of the clinical manifestations during the initial 5 years of follow-up (1990-1995) were compared with those during the ensuing 5 years (1995-2000), most manifestations were found to be more frequent during the initial 5 years. Of the 1,000 patients, 360 (36%) presented infections, 169 (16.9%) hypertension, 121 (12.1%) osteoporosis, and 81 (8.1%) cytopenia due to immunosuppressive agents. Twenty-three (2.3%) patients developed malignancies; the most frequent primary localizations were the uterus and the breast.Sixty-eight (6.8%) patients died, and the most frequent causes of death were similarly divided between active SLE (26.5%), thromboses (26.5%), and infections (25%). A survival probability of 92% at 10 years was found. A lower survival probability was detected in those patients who presented at the beginning of the study with nephropathy (88% versus 94% in patients without nephropathy, p = 0.045). When the causes of death during the initial 5 years of follow-up (1990-1995) were compared with those during the ensuing 5 years (1995-2000), active SLE and infections (28.9% each) appeared to be the most common causes during the initial 5 years, while thromboses (26.1%) became the most common cause of death during the last 5 years.In conclusion, most of the SLE inflammatory manifestations appear to be less common after a long-term evolution of the disease, probably reflecting the effect of therapy as well as the progressive remission of the disease in many patients. Meanwhile, a more prominent role of thrombotic events is becoming evident, affecting both morbidity and mortality in SLE.

Antiphosphatidylserine/prothrombin antibodies (aPS/PT) as potential markers of antiphospholipid syndrome.

The antiphospholipid antibodies present in antiphospholipid syndrome (APS) are directed at a number of phospholipid-binding proteins: ß2 glycoprotein I (ß2GPI), prothrombin, and so on. Antibodies directed at ß2GPI are accepted as a classification criterion for APS, while the presence of antiprothrombin antibodies is not. In the present article, we investigated the possible role of antiphosphatidylserine/prothrombin antibodies (aPS/PT) as marker of APS on a cohort of 295 individuals with APS (95 primary APS and 45 secondary APS) and APS-related diseases. We found aPS/PT to be highly associated with venous thrombosis (immunoglobulin G [IgG] aPS/PT odds ratio [OR], 7.44; 95% confidence interval [CI], 3.97-13.92 and IgM aPS/PT OR, 2.54; 95% CI, 1.35-4.77) and obstetric abnormalities (IgG aPS/PT OR, 2.37; 95% CI, 1.04-5.43), but not with arterial thrombosis. A very high degree of concordance between the concentration of aPS/PT and lupus anticoagulant activity was demonstrated. Therefore, we support the inclusion of aPS/PT determination as second-level assay to confirm APS classification.

Informed consent in clinical research; Do patients understand what they have signed? / El consentimiento informado en investigación clínica; ¿Entienden los pacientes lo que firman?

Informed consent is an essential element of research, and signing this document is required to conduct most clinical trials. Its aim is to inform patients what their participation in the study will involve. However, increasingly, their complexity and length are making them difficult to understand, which might lead patients to give their authorization without having read them previously or without having understood what is stated. In this sense, the Ethics Committees for Clinical Research, and Pharmacists specialized in Hospital Pharmacy and Primary Care in their capacity as members of said committees, play an important and difficult role in defending the rights of patients. These Committees will review thoroughly these documents to guarantee that all legal requirements have been met and, at the same time, that they are easy to understand by the potential participants in a clinical trial (AU)

El consentimiento informado es una parte esencial de la investigación y su firma es imprescindible para llevar a cabo la mayor parte de los estudios clínicos. Su fin es poner en conocimiento del paciente lo que implica su participación en el estudio que se le propone. Sin embargo, cada vez más, su complejidad y extensión los hacen difícilmente comprensibles, por lo que se corre el riesgo de que el paciente dé su autorización sin haberlo leído previamente o sin haber entendido lo que en él se le expone. En este sentido, los comités éticos de investigación clínica y los farmacéuticos, especialistas en farmacia hospitalaria y atención primaria como parte integrante de los mismos, cumplen un importante y difícil papel en la defensa de los derechos de los pacientes. En ellos se revisan exhaustivamente estos documentos para garantizar que todos los requisitos que exige la normativa estén contemplados y, al mismo tiempo, que sean de fácil comprensión para los potenciales participantes en un estudio (AU)