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1.
Front Immunol ; 9: 2142, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-30283460

RESUMO

Acquired generalized lipodystrophy (AGL) is a rare condition characterized by an altered distribution of adipose tissue and predisposition to develop hepatic steatosis and fibrosis, diabetes, and hypertriglyceridemia. Diagnosis of AGL is based on the observation of generalized fat loss, autoimmunity and lack of family history of lipodystrophy. The pathogenic mechanism of fat destruction remains unknown but evidences suggest an autoimmune origin. Anti-adipocyte antibodies have been previously reported in patients with AGL, although their involvement in the pathogenesis has been poorly studied and the autoantibody target/s remain/s to be identified. Using a combination of immunochemical and cellular studies, we investigated the presence of anti-adipocyte autoantibodies in patients with AGL, acquired partial lipodystrophy, localized lipoatrophy due to intradermic insulin injections or systemic lupus erythematosus. Moreover, the impact of anti-adipocyte autoantibodies from AGL patients was assessed in cultured mouse preadipocytes. Following this approach, we identified anti-perilipin 1 IgG autoantibodies in the serum of patients with autoimmune variety-AGL, but in no other lipodystrophies tested. These autoantibodies altered the ability of perilipin 1 to regulate lipolysis in cultured preadipocytes causing abnormal, significantly elevated basal lipolysis. Our data provide strong support for the conclusion that perilipin 1 autoantibodies are a cause of generalized lipodystrophy in these patients.


Assuntos
Adipócitos/imunologia , Autoanticorpos/imunologia , Lipodistrofia Generalizada Congênita/imunologia , Perilipina-1/imunologia , Células 3T3-L1 , Adipócitos/citologia , Adolescente , Adulto , Animais , Autoanticorpos/sangue , Biomarcadores/sangue , Células Cultivadas , Criança , Feminino , Humanos , Gotículas Lipídicas/imunologia , Gotículas Lipídicas/metabolismo , Lipodistrofia Generalizada Congênita/sangue , Lipodistrofia Generalizada Congênita/diagnóstico , Lipólise/imunologia , Masculino , Camundongos , Pessoa de Meia-Idade , Perilipina-1/metabolismo
2.
Rev. cuba. endocrinol ; 28(1): 1-7, Jan.-Apr. 2017. ilus
Artigo em Espanhol | LILACS | ID: biblio-901010

RESUMO

El síndrome Berardinelli es una enfermedad poco frecuente, con amplia heterogeneidad clínica y genética, clínicamente caracterizada por pérdida de tejido adiposo a nivel subcutáneo y de otros tejidos. Esta lipodistrofia generalizada congénita provoca hipertrofia muscular, asociada a trastornos endocrinos, con crecimiento acelerado durante la infancia, pubertad precoz e hiperglicemia. Está considerada una enfermedad metabólica rara, que se hereda de forma autosómico recesiva. En la actualidad se describen 4 variantes de este síndrome, con varios genes implicados. El objetivo de este trabajo es describir las características clínicas en una niña, en la cual su aspecto fenotípico recuerda este síndrome, por la lipodistrofia marcada y aumento de la musculatura desde la etapa de lactante, por lo cual se consideró necesaria la valoración en equipo multidisciplinario para su adecuado seguimiento y asesoramiento genético a sus familiares(AU)


Berardinelli syndrome is a rare disease, with broad clinical and genetic heterogeneity, and clinically characterized by loss of fatty tissue at subcutaneous level and of other tissues. This generalized congenital lipodystrophy causes muscle hypertrophy associated to endocrine disorders, accelerated growth at childhood, early puberty and hyperglycemia. It is considered as a rare metabolic disease and also recessive autosomal inheritance. Nowadays, four variants of the syndrome are described in which several gens are involved. The objective of this paper was to describe the clinical characteristics of a girl whose phenotypical aspect resembles this syndrome due to the marked lipodystrophy and increased musculature since her breastfeeding phase. Therefore, it was necessary to make an assessment by a multidisciplinary team for her adequate follow-up and the genetic counselling to her family(AU)


Assuntos
Humanos , Feminino , Pré-Escolar , Lipodistrofia Generalizada Congênita/diagnóstico , Lipodistrofia Generalizada Congênita/fisiopatologia , Lipodistrofia Parcial Familiar/epidemiologia
3.
Rev. cuba. endocrinol ; 28(1): 1-7, Jan.-Apr. 2017. ilus
Artigo em Espanhol | CUMED | ID: cum-73046

RESUMO

El síndrome Berardinelli es una enfermedad poco frecuente, con amplia heterogeneidad clínica y genética, clínicamente caracterizada por pérdida de tejido adiposo a nivel subcutáneo y de otros tejidos. Esta lipodistrofia generalizada congénita provoca hipertrofia muscular, asociada a trastornos endocrinos, con crecimiento acelerado durante la infancia, pubertad precoz e hiperglicemia. Está considerada una enfermedad metabólica rara, que se hereda de forma autosómico recesiva. En la actualidad se describen 4 variantes de este síndrome, con varios genes implicados. El objetivo de este trabajo es describir las características clínicas en una niña, en la cual su aspecto fenotípico recuerda este síndrome, por la lipodistrofia marcada y aumento de la musculatura desde la etapa de lactante, por lo cual se consideró necesaria la valoración en equipo multidisciplinario para su adecuado seguimiento y asesoramiento genético a sus familiares(AU)


Berardinelli syndrome is a rare disease, with broad clinical and genetic heterogeneity, and clinically characterized by loss of fatty tissue at subcutaneous level and of other tissues. This generalized congenital lipodystrophy causes muscle hypertrophy associated to endocrine disorders, accelerated growth at childhood, early puberty and hyperglycemia. It is considered as a rare metabolic disease and also recessive autosomal inheritance. Nowadays, four variants of the syndrome are described in which several gens are involved. The objective of this paper was to describe the clinical characteristics of a girl whose phenotypical aspect resembles this syndrome due to the marked lipodystrophy and increased musculature since her breastfeeding phase. Therefore, it was necessary to make an assessment by a multidisciplinary team for her adequate follow-up and the genetic counselling to her family(AU)


Assuntos
Humanos , Feminino , Pré-Escolar , Lipodistrofia Generalizada Congênita/diagnóstico , Lipodistrofia Generalizada Congênita/fisiopatologia , Lipodistrofia Parcial Familiar/epidemiologia
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