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"fig0005" "etiqueta" => "Figura 1" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr1.jpeg" "Alto" => 1468 "Ancho" => 1500 "Tamanyo" => 302738 ] ] "descripcion" => array:1 [ "es" => "<p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">a y b) Evolución de la pérdida de grasa en la cara; c) Glomérulos con aumento de la celularidad mesangial, y afectación focal y segmentaria (H&E ×100) y d) Inmunofluorescencia granular mesangial con anti-IgA.</p>" ] ] ] "autores" => array:1 [ 0 => array:2 [ "autoresLista" => "Carmen de Lucas-Collantes, Jesús Pozo-Román, Cristina Aparicio-López, Inmaculada de Prada-Vicente, Jesús Argente" "autores" => array:5 [ 0 => array:2 [ "nombre" => "Carmen" "apellidos" => "de Lucas-Collantes" ] 1 => array:2 [ "nombre" => "Jesús" "apellidos" => "Pozo-Román" ] 2 => array:2 [ "nombre" => "Cristina" "apellidos" => "Aparicio-López" ] 3 => array:2 [ "nombre" => "Inmaculada" 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"identificador" => "aff0005" ] ] ] 3 => array:3 [ "nombre" => "Inmaculada" "apellidos" => "de Prada-Vicente" "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">c</span>" "identificador" => "aff0015" ] ] ] 4 => array:3 [ "nombre" => "Jesús" "apellidos" => "Argente" "referencia" => array:5 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">b</span>" "identificador" => "aff0010" ] 1 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">c</span>" "identificador" => "aff0015" ] 2 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">d</span>" "identificador" => "aff0020" ] 3 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">e</span>" "identificador" => "aff0025" ] 4 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">f</span>" "identificador" => "aff0030" ] ] ] ] "afiliaciones" => array:6 [ 0 => array:3 [ "entidad" => "Departamento de Nefrología Pediátrica, Hospital Infantil Universitario Niño Jesús, Madrid, Spain" "etiqueta" => "a" "identificador" => "aff0005" ] 1 => array:3 [ "entidad" => "Departamento de Endocrinología Pediátrica, Hospital Infantil Universitario Niño Jesús, Madrid, Spain" "etiqueta" => "b" "identificador" => "aff0010" ] 2 => array:3 [ "entidad" => "Departamento de Anatomía Patológica, Hospital Infantil Universitario Niño Jesús, Madrid, Spain" "etiqueta" => "c" "identificador" => "aff0015" ] 3 => array:3 [ "entidad" => "Instituto de Investigación La Princesa, Madrid, Spain" "etiqueta" => "d" "identificador" => "aff0020" ] 4 => array:3 [ "entidad" => "Departamento de Pediatría, Universidad Autónoma de Madrid, Madrid, Spain" "etiqueta" => "e" "identificador" => "aff0025" ] 5 => array:3 [ "entidad" => "CIBEROBN, Instituto de Salud Carlos III, Madrid, Spain" "etiqueta" => "f" "identificador" => "aff0030" ] ] "correspondencia" => array:1 [ 0 => array:3 [ "identificador" => "cor0005" "etiqueta" => "⁎" "correspondencia" => "<span class="elsevierStyleItalic">Corresponding author</span>." ] ] ] ] "titulosAlternativos" => array:1 [ "es" => array:1 [ "titulo" => "Lipodistrofia parcial adquirida (síndrome de Barraquer-Simons) y nefropatía IgA" ] ] "resumenGrafico" => array:2 [ "original" => 0 "multimedia" => array:7 [ "identificador" => "fig0005" "etiqueta" => "Fig. 1" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr1.jpeg" "Alto" => 1468 "Ancho" => 1500 "Tamanyo" => 326780 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">(a and b) Progression of the loss of facial fat; (c) Glomeruli with increased mesangial cellularity, and focal and segmental involvement (H&E ×100) and (d) Mesangial granular immunofluorescence with anti-IgA.</p>" ] ] ] "textoCompleto" => "<span class="elsevierStyleSections"><p id="par0005" class="elsevierStylePara elsevierViewall">Lipodystrophy syndromes are a heterogeneous group of rare diseases characterised by selective loss of adipose tissue, which often leads to insulin resistance with a tendency to develop diabetes, dyslipidaemia, hepatic steatosis, acanthosis nigricans and hyperandrogenism.<a class="elsevierStyleCrossRef" href="#bib0055"><span class="elsevierStyleSup">1</span></a> Acquired partial lipodystrophy (APL; OMIM: <a id="intr0010" class="elsevierStyleInterRef" href="omim:608709">608709</a>), also known as Barraquer–Simons syndrome, is one of the most common, and predominantly affects women (4:1). It is characterised by a progressive loss of subcutaneous fat, usually starting in childhood,<a class="elsevierStyleCrossRef" href="#bib0060"><span class="elsevierStyleSup">2</span></a> and progresses from the head down, affecting the face, upper limbs, trunk and abdomen. Unlike other types of lipodystrophy, insulin resistance and metabolic complications, apart from hepatomegaly (60%), are rare.<a class="elsevierStyleCrossRefs" href="#bib0055"><span class="elsevierStyleSup">1,2</span></a></p><p id="par0010" class="elsevierStylePara elsevierViewall">In 10–20% of cases, APL is associated with autoimmune disorders, especially lupus. The most common complication (20%) is the development of membranoproliferative glomerulonephritis type 2, or dense deposit disease (DDD) approximately 8 years after onset of the disease. The pathogenesis of such renal involvement includes activation of the alternative complement pathway (ACP).<a class="elsevierStyleCrossRef" href="#bib0065"><span class="elsevierStyleSup">3</span></a> Patients show decreased serum C3 levels (70%) and are positive for C3NeF (80%),<a class="elsevierStyleCrossRef" href="#bib0060"><span class="elsevierStyleSup">2</span></a> an autoantibody capable of altering the ACP and in the case of APL, it is suspected to play a role in the destruction of fatty tissue.<a class="elsevierStyleCrossRef" href="#bib0070"><span class="elsevierStyleSup">4</span></a></p><p id="par0015" class="elsevierStylePara elsevierViewall">We had the case of a 15-year-old Caucasian girl with no relevant family or personal clinical history who was diagnosed of APL at the age of 5 due to progressive loss of subcutaneous fat from her face (<a class="elsevierStyleCrossRef" href="#fig0005">Fig. 1</a>a and b), with subsequent involvement of neck and shoulders. In her regular visits, no clinical or laboratory abnormalities had been observed, except for the slow progression of lipoatrophy and sustained decreased serum levels of C3 (26–48<span class="elsevierStyleHsp" style=""></span>mg/dl; VN: 86–184). She had never had clinical or analytical data suggestive of nephropathy, dyslipidaemia, insulin resistance or hyperandrogenism. Her serum leptin (8.03<span class="elsevierStyleHsp" style=""></span>ng/ml; NR: 15.3<span class="elsevierStyleHsp" style=""></span>±<span class="elsevierStyleHsp" style=""></span>8.1 SD) and adiponectin (8.3<span class="elsevierStyleHsp" style=""></span>mg/ml; NR: 12.0<span class="elsevierStyleHsp" style=""></span>±<span class="elsevierStyleHsp" style=""></span>3.1 SD) levels were slightly low and the DXA body composition study showed a reduction in total body fat (17.7%; NR: 25.9<span class="elsevierStyleHsp" style=""></span>±<span class="elsevierStyleHsp" style=""></span>6.3).</p><elsevierMultimedia ident="fig0005"></elsevierMultimedia><p id="par0020" class="elsevierStylePara elsevierViewall">At the age of 13, after three days of fever and in the context of acute gastroenteritis, she was found to have macroscopic haematuria with non-nephrotic proteinuria (13<span class="elsevierStyleHsp" style=""></span>mg/kg/day) and transient elevation of creatinine (maximum: 0.74<span class="elsevierStyleHsp" style=""></span>mg/dl). The pyrexia subsided 24<span class="elsevierStyleHsp" style=""></span>h later, but the macroscopic haematuria persisted for two weeks, with no other symptoms and with improvement in kidney function. Serum levels of IgA were found to be high (377<span class="elsevierStyleHsp" style=""></span>mg/dl; NR: 40–350), C3 remained low and C3NeF negative. Studies of autoimmunity (anti-thyroid, anti-neutrophil and anti-nuclear antibodies) were negative. Percutaneous kidney biopsy was performed one month after the haematuria resolved. The specimen contained 14 glomeruli and revealed the presence of focal and segmental mesangial hypercellularity (<a class="elsevierStyleCrossRef" href="#fig0005">Fig. 1</a>c): M1, E0, S0 and T0 according to the Oxford classification<a class="elsevierStyleCrossRef" href="#bib0075"><span class="elsevierStyleSup">5</span></a> (mesangial hypercellularity [M], endocapillary proliferation [E], segmental glomerulosclerosis [S] and interstitial fibrosis with tubular atrophy [T]). Only one of the glomeruli had a crescent that occupied 26–50% of the glomerulus. Immunofluorescence showed granular mesangial IgA and C3 deposits (<a class="elsevierStyleCrossRef" href="#fig0005">Fig. 1</a>d). Electron microscopy confirmed the presence of electron-dense deposits in the glomerulus, ruling out DDD. The patient was diagnosed with IgA nephropathy (IgAN), achieving clinical remission with spontaneous disappearance of the proteinuria and haematuria, but maintaining decreased serum levels of C3 (33<span class="elsevierStyleHsp" style=""></span>mg/dl) and increased serum IgA (353<span class="elsevierStyleHsp" style=""></span>mg/dl).</p><p id="par0025" class="elsevierStylePara elsevierViewall">APL is a rare disease of uncertain aetiology. The association of APL with autoimmune diseases and DDD, in addition to the decrease in C3 and C3NeF positivity point to an autoimmune basis<a class="elsevierStyleCrossRef" href="#bib0060"><span class="elsevierStyleSup">2</span></a>; although a possible genetic predisposition has also been suggested.<a class="elsevierStyleCrossRef" href="#bib0080"><span class="elsevierStyleSup">6</span></a> IgAN, meanwhile, is the most common glomerular disease in the world.<a class="elsevierStyleCrossRef" href="#bib0085"><span class="elsevierStyleSup">7</span></a> The aetiopathogenesis of IgAN, which is not fully understood, also involves complement activation through the ACP<a class="elsevierStyleCrossRefs" href="#bib0085"><span class="elsevierStyleSup">7–9</span></a> and sometimes through the lectin pathway.<a class="elsevierStyleCrossRef" href="#bib0100"><span class="elsevierStyleSup">10</span></a> Diagnosis is histological and kidney biopsy shows mesangial immune deposits of IgA1 with C3 and occasionally IgG or IgM. In the mesangial deposits, it is common to find components of the ACP (C3 and properdin), but not of the classic pathway (C1q and C4) which, taken together with normal serum C3 and other complement components, suggests that the complement activation occurs in the kidney itself.</p><p id="par0030" class="elsevierStylePara elsevierViewall">To summarise, we present the first reported case of APL associated to IgAN. Although, given the incidence of IgAN, it could be a coincidence, the fact that the APL is often associated with nephropathy, the DDD, whose pathogenesis, like IgAN, involves activation of the ACP, raises the possibility of a common link between the two diseases.</p><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0005">Conflicts of interest</span><p id="par0035" class="elsevierStylePara elsevierViewall">The authors declare that they have no conflicts of interest.</p></span></span>" "textoCompletoSecciones" => array:1 [ "secciones" => array:3 [ 0 => array:2 [ "identificador" => "sec0005" "titulo" => "Conflicts of interest" ] 1 => array:2 [ "identificador" => "xack261807" "titulo" => "Acknowledgements" ] 2 => array:1 [ "titulo" => "References" ] ] ] "pdfFichero" => "main.pdf" "tienePdf" => true "NotaPie" => array:1 [ 0 => array:2 [ "etiqueta" => "☆" "nota" => "<p class="elsevierStyleNotepara" id="npar0005">Please cite this article as: de Lucas-Collantes C, Pozo-Román J, Aparicio-López C, de Prada-Vicente I, Argente J. Lipodistrofia parcial adquirida (síndrome de Barraquer-Simons) y nefropatía IgA. Nefrología. 2016;36:556–558.</p>" ] ] "multimedia" => array:1 [ 0 => array:7 [ "identificador" => "fig0005" "etiqueta" => "Fig. 1" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr1.jpeg" "Alto" => 1468 "Ancho" => 1500 "Tamanyo" => 326780 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">(a and b) Progression of the loss of facial fat; (c) Glomeruli with increased mesangial cellularity, and focal and segmental involvement (H&E ×100) and (d) Mesangial granular immunofluorescence with anti-IgA.</p>" ] ] ] "bibliografia" => array:2 [ "titulo" => "References" "seccion" => array:1 [ 0 => array:2 [ "identificador" => "bibs0005" "bibliografiaReferencia" => array:10 [ 0 => array:3 [ "identificador" => "bib0055" "etiqueta" => "1" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Acquired and inherited lipodystrophies" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:1 [ 0 => "A. 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