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A missense single-nucleotide polymorphism in the sialic acid acetylesterase (SIAE) gene is associated with anti-PIT-1 antibody syndrome. 2014

Masaaki Yamamoto, and Genzo Iguchi, and Hironori Bando, and Hidenori Fukuoka, and Kentaro Suda, and Michiko Takahashi, and Hitoshi Nishizawa, and Ryusaku Matsumoto, and Katsuyoshi Tojo, and Atsuko Mokubo, and Tsutomu Ogata, and Yutaka Takahashi
Division of Diabetes, Metabolism and Endocrinology, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan.

A novel clinical entity related to autoimmune polygladular syndrome (APS) termed "anti-PIT-1 antibody syndrome" is characterized by a presence of circulating autoantibody against the pituitary-specific transcriptional factor-1 (PIT-1) with acquired specific defect in GH, PRL, and TSH. Although autoimmunity to PIT-1 has been suggested, the underlying mechanisms remain to be elucidated. Sialic acid acetylesterase (SIAE) plays a crucial role in regulating the threshold of autoantibody production of B-cells and the defective variants of SIAE are associated with an increased risk of various autoimmune diseases such as type 1 diabetes (T1DM). To explore the link between anti-PIT-1 antibody syndrome and SIAE, we analyzed SIAE gene in 3 patients with anti-PIT-1 antibody syndrome and 200 healthy control subjects, and compared the prevalence of single nucleotide polymorphisms. Intriguingly, we found A467V SIAE variants (c.1400C>T, rs7941523) in a heterozygous state in all the patients with anti-PIT-1 antibody syndrome, while we detected in 6 % of control subjects, in which the prevalence was significantly increased in the patients (P<0.0005). Considering the physiological function of SIAE and the clinical features of anti-PIT-1 antibody syndrome, present data imply a novel aspect of the pathogenesis in this disease.

UI MeSH Term Description Entries
D008297 Male Males
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D010900 Pituitary Diseases Disorders involving either the ADENOHYPOPHYSIS or the NEUROHYPOPHYSIS. These diseases usually manifest as hypersecretion or hyposecretion of PITUITARY HORMONES. Neoplastic pituitary masses can also cause compression of the OPTIC CHIASM and other adjacent structures. Adenohypophyseal Diseases,Hypophyseal Disorders,Neurohypophyseal Diseases,Anterior Pituitary Diseases,Pituitary Disorders,Pituitary Gland Diseases,Posterior Pituitary Diseases,Adenohypophyseal Disease,Anterior Pituitary Disease,Disease, Adenohypophyseal,Disease, Anterior Pituitary,Disease, Neurohypophyseal,Disease, Pituitary,Disease, Pituitary Gland,Disease, Posterior Pituitary,Diseases, Adenohypophyseal,Diseases, Anterior Pituitary,Diseases, Neurohypophyseal,Diseases, Pituitary,Diseases, Pituitary Gland,Diseases, Posterior Pituitary,Disorder, Hypophyseal,Disorder, Pituitary,Disorders, Hypophyseal,Disorders, Pituitary,Hypophyseal Disorder,Neurohypophyseal Disease,Pituitary Disease,Pituitary Disease, Anterior,Pituitary Disease, Posterior,Pituitary Diseases, Anterior,Pituitary Diseases, Posterior,Pituitary Disorder,Pituitary Gland Disease,Posterior Pituitary Disease
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000115 Acetylesterase An enzyme that catalyzes the conversion of acetate esters and water to alcohols and acetate. EC 3.1.1.6. Acetylase,Acetate Esterase,Acid Esterase,Esterase-17,Esterase 17,Esterase, Acetate,Esterase, Acid
D000368 Aged A person 65 years of age or older. For a person older than 79 years, AGED, 80 AND OVER is available. Elderly
D000369 Aged, 80 and over Persons 80 years of age and older. Oldest Old
D001323 Autoantibodies Antibodies that react with self-antigens (AUTOANTIGENS) of the organism that produced them. Autoantibody
D001327 Autoimmune Diseases Disorders that are characterized by the production of antibodies that react with host tissues or immune effector cells that are autoreactive to endogenous peptides. Autoimmune Disease,Disease, Autoimmune,Diseases, Autoimmune
D013577 Syndrome A characteristic symptom complex. Symptom Cluster,Cluster, Symptom,Clusters, Symptom,Symptom Clusters,Syndromes

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