Bernard-Soulier syndrome (Hemorrhagiparous thrombocytic dystrophy)
نویسنده
چکیده
Bernard-Soulier syndrome (BSS), also known as Hemorrhagiparous thrombocytic dystrophy, is a hereditary bleeding disorder affecting the megakaryocyte/platelet lineage and characterized by bleeding tendency, giant blood platelets and low platelet counts. This syndrome is extremely rare as only approximately 100 cases have been reported in the literature. Clinical manifestations usually include purpura, epistaxis, menorrhagia, gingival and gastrointestinal bleeding. The syndrome is transmitted as an autosomal recessive trait. The underlying defect is a deficiency or dysfunction of the glycoprotein GPIb-V-IX complex, a platelet-restricted multisubunit receptor required for normal primary hemostasis. The GPIb-V-IX complex binds von Willebrand factor, allowing platelet adhesion and platelet plug formation at sites of vascular injury. Genes coding for the four subunits of the receptor, GPIBA, GPIBB, GP5 and GP9, map to chromosomes 17p12, 22q11.2, 3q29, and 3q21, respectively. Defects have been identified in GPIBA, GPIBB, and GP9 but not in GP5. Diagnosis is based on a prolonged skin bleeding time, the presence of a small number of very large platelets (macrothrombocytopenia), defective ristocetin-induced platelet agglutination and low or absent expression of the GPIb-V-IX complex. Prothrombin consumption is markedly reduced. The prognosis is usually good with adequate supportive care but severe bleeding episodes can occur with menses, trauma and surgical procedures. Treatment of bleeding or prophylaxis during surgical procedures usually requires platelet transfusion.
منابع مشابه
Quantitative Immunophemotyping of Platelet Surface Glycoproteins among Iranian Patients with Bernard-Soulier Syndrome
Background: Bernard-Soulier syndrome is a rare inherited bleeding disease caused by quantitative or qualitative defect of GPIb/IX/V, a platelet complex that binds the Von Willebrand factor. The expression of GPIb-IX-V complex can be evaluated by flow cytometry and confirmed by the absence of ristocetin-induced platelet aggregation in platelet-rich plasma. The main aim of the present study was t...
متن کاملBernard-Soulier syndrome or idiopathic thrombocytopenic purpura: A case series
Background: Bernard-Soulier syndrome (BSS) is a rare, autosomal recessive platelet function disorder which is commonly mistaken for idiopathic thrombocytopenic purpura (ITP).The report includes seven cases of BSS that have been diagnosed and treated as ITP for a long time. Methods: Between 2006 and 2016, data of seven BSS patients who have long been diagnosed and treated as ITP were collected ...
متن کاملشناسایی 5 جهش جدید در ژن گلیکوپروتئین Ibα پلاکت در بیماران برنارد- سولیر ایران
Background & Aim: Bernard-Soulier syndrome (B.S.S) is a rare hereditary bleeding disorder due to molecular defects of platelet GPIb–IX–V. The GPIb-IX-V complex is composed of four chains of GPIbα, GPIbβ, GPIX and GPV. The largest chain of this complex is GPIbα and is responsible for binding to ligand and most of identified mutations belong to this glycoprotein. The aim of this study was...
متن کاملGeneration and rescue of a murine model of platelet dysfunction: the Bernard-Soulier syndrome.
The human Bernard-Soulier syndrome is an autosomal recessive disorder of platelet dysfunction presenting with mild thrombocytopenia, circulating "giant" platelets and a bleeding phenotype. The bleeding in patients with the Bernard-Soulier syndrome is disproportionately more severe than suggested by the reduced platelet count and is explained by a defect in primary hemostasis owing to the absenc...
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عنوان ژورنال:
- Orphanet Journal of Rare Diseases
دوره 1 شماره
صفحات -
تاریخ انتشار 2006