🧬 Genetic Disorder

Bernard-Soulier Syndrome

Also known as: BSS, Giant Platelet Syndrome, Bernard-Soulier Giant Platelet Syndrome

Bernard-Soulier syndrome (BSS) is a rare genetic bleeding disorder characterized by abnormally large platelets (thrombocytopenia), a reduced platelet count (thrombocytopenia), and impaired platelet function, leading to a tendency to bleed excessively. It is caused by defects in the glycoprotein Ib/IX/V complex, which is essential for platelet adhesion to damaged blood vessel walls.

ICD-10: D69.1 Orphanet: 132 OMIM: 231200
👥 Less than 1 in 1,000,000 Prevalence
🔬 5 Active Trials

Imagine your blood has tiny helpers called platelets that stop you from bleeding too much when you get a cut. In Bernard-Soulier Syndrome, these helpers are too big and don't work properly, so you might bleed more easily and for a longer time.

Signs & Symptoms

  • Easy bruising
  • Nosebleeds (epistaxis)
  • Prolonged bleeding after injuries or surgery
  • Heavy menstrual periods (menorrhagia) in females
  • Gum bleeding
  • Skin bleeding (petechiae or purpura)
  • Thrombocytopenia (low platelet count)
  • Giant platelets on blood smear

Treatment Options

SUPPORTIVE FDA Approved

Platelet Transfusions

MODERATELY EFFECTIVE
MEDICATION FDA Approved

Recombinant Factor VIIa (rFVIIa)

MODERATELY EFFECTIVE Approved 1999
MEDICATION FDA Approved

Desmopressin (DDAVP)

MODERATELY EFFECTIVE Approved 1978
MEDICATION FDA Approved

Antifibrinolytic Agents (e.g., tranexamic acid, aminocaproic acid)

MODERATELY EFFECTIVE
GENE THERAPY

Hematopoietic Stem Cell Transplantation (HSCT)

HIGHLY EFFECTIVE
SUPPORTIVE

Avoidance of Antiplatelet Medications (e.g., aspirin, NSAIDs)

HIGHLY EFFECTIVE

Diagnosis

  • Complete blood count (CBC) with platelet count
  • Peripheral blood smear examination (to identify giant platelets)
  • Platelet aggregation studies (to assess platelet function)
  • Flow cytometry (to assess the expression of the glycoprotein Ib/IX/V complex on platelets)
  • Genetic testing (to identify mutations in the genes encoding the glycoprotein Ib/IX/V complex subunits: GP1BA, GP1BB, and GP9)

History

Bernard-Soulier syndrome was first described in 1948 by French hematologists Jean Bernard and Jean-Pierre Soulier, who identified a bleeding disorder characterized by giant platelets and prolonged bleeding times in two unrelated patients.

Recent Breakthroughs

2022

Gene Therapy Approaches for Bernard-Soulier Syndrome

Research is ongoing to develop gene therapy strategies to correct the genetic defects underlying Bernard-Soulier Syndrome. Early preclinical studies show promise in restoring normal platelet function and reducing bleeding tendencies.

2023

Novel Anti-Thrombotic Agents for BSS

Development of novel anti-thrombotic agents that bypass the defective GPIb-IX-V complex is under investigation to improve platelet function in BSS patients without increasing bleeding risk.