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Giuseppe Agosta

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BC: Articoli scritti da S. Gelsumini

Prevalenza di gammopatia monoclonale di incerto significato (MGUS) in soggetti ambulatoriali di età >50 anni: un’indicazione all’esecuzione dell’elettroforesi delle sieroproteine?
Prevalence of the monoclonal gammopathy of undetermined significance (MGUS) in out-patients >50 years old: an indication to carry out electrophoresis of serum protein?
Biochimica Clinica ; 38(2) 154-155
Lettere all'Editore - Letters to the Editor
 
Documento congiunto di SIBIOC, della Società Italiana dell’Osteoporosi, del Metabolismo Minerale e delle Malattie dello Scheletro (SIOMMMS), della Sezione Italiana della European Ligand Assay Society (ELAS), e della Associazione Medici Endocrinologi (AME)
Joint Document from: Italian Society of Clinical Biochemistry and Clinical Molecular Biology (SIBioC), Italian Society of Osteoporosis, Mineral Metabolism, and Skeletal Diseases (SIOMMMS), Italina Section of Ligand Assay (ELAS), Association of Endocrinolo
<p>Vitamin D, and its metabolites, have key roles in the functioning of virtually all tissues. Indeed, besides the unquestioned role in bone mineral metabolism, evidences have pointed out roles in inflammation and autoimmunity, skeletal muscle and cardiac function, neuromuscular communication. Therefore, vitamin D deficiency associates with&nbsp;rickets in the child, osteomalacia and increased risk of fracture in the adulthood and possibly with the increased risk<br />of other pathological conditions. In order to regulate the prescription of vitamin D supplementation (cholecalciferol, cholecalciferol/calcium salts, calcifediol) to the adult population, and consequently to contain the costs sustained by the National Health System, the Italian Medicine Agency (AIFA) has recently drafted the &ldquo;Nota 96&rdquo; identifying the categories of patients, based on the laboratory measurement of serum levels of 25(OH)D, that can benefit from the reimbursement of vitamin D therapy. If the &ldquo;Nota 96&rdquo;, AIFA has the merit to define rules in a field only sligtly regulated, several considerations emerged from its analysis. From an analytical point of view, the &ldquo;Nota 96&rdquo; does not consider the issues of reliability and reproducibility of 25(OH)D measurement and standardization of the units of measurement and reporting. On the clinical side, the &ldquo;Nota 96&rdquo; does not consider the epidemic vitamin D insufficiency/deficiency that needs an adequate preventive approach and, furthermore, beyond its roles, the agency indicates the clinical conditions for whom vitamin D prescription is allowed. This document analyses the content of &ldquo;Nota 96&rdquo; highlighting the points that need further evaluations and by giving possible different solutions; the document provides also recommendations on laboratory reporting of vitamin D measurements.</p>
Biochimica Clinica ; 17(1)
Documenti SIBioC - SIBioC Documents
 
Revisione e aggiornamento del documento di consenso SIBioC per la ricerca e quantificazione della proteina di Bence Jones
Update of the Italian Society of Clinical Biochemistry (SIBioC) Consensus document on the detection and quantification of the Bence Jones protein
<p>Bence Jones protein (BJP) refers to urine monoclonal free immunoglobulin light chains produced by the clonal expansion of a plasma cell in the bone marrow. BJP is strongly associated with systemic amyloidosis AL, light chain deposition disease, and multiple myeloma; less frequently, BJP may be recognized either in patients with monoclonal gammopathies of uncertain significance (MGUS) and with other plasma cell dyscrasias or in patients with malignant non-Hodgkin&#39;s lymphomas and chronic lymphocytic leukemia. This paper contains updated recommendations for the detection and the measurement of BJP in clinical practice from the Working Group &ldquo;Proteins&rdquo; of the Italian Society of Clinical Biochemistry (SIBioC), with specific indications for improving all the steps of the preanalytical, analytical, and postanalytical phases. The first morning void is the urine sample recommended for BJP detection, while 24-hours urine collection is preferred for BJP quantification. Native urine cannot be used for samples with low or very low content in urine total protein; in these cases, samples should be concentrated by using specific disposables, such as ultrafiltration membranes retaining proteins with molecular weight around 10 kDa. The required degree of concentration may vary according to sensitivity of the electrophoretic method utilized and the protein content of the sample. The detection of BJP may be performed directly by the recommended method agarose gel immunofixation (IFE) with specific polyvalent immunoglobulin antisera IgG-IgA-IgM, total  and  light chains; alternatively, an electrophoretic screening may be acceptable to rule out negative test results. However, positive test results should be confirmed by IFE. Tests based on immunometric methods can be used neither as screening test, nor for the BJP quantification; however, it could be useful for monitoring purposes, provided that the renal function of the patient is preserved. BJP measurement should be performed by the densitometric scanning of the electrophoretic peak corresponding to BJP, and results should be expressed as ratio of the BJP peak percentage to the urine total protein. Test results should be always integrated by standardized interpretative comments included in the laboratory reports.</p>
Biochimica Clinica ; 17(1)
Documenti SIBioC - SIBioC Documents