A novel frame shift mutation in STIM1 gene causing primary immunodeficiency.

Area of Science:

• Genetics
• Immunology
• Pediatrics

Background:

• Immunodeficiency 10 is an autosomal recessive disorder linked to stromal interaction molecule 1 (STIM1) gene mutations.
• Clinical manifestations include iris hypoplasia, hypotonia, myopathy, recurrent infections, and autoimmune hemolytic anemia.
• STIM1 mutations disrupt calcium signaling, impacting immune cell function.

Purpose of the Study:

• To report a novel frameshift mutation in the STIM1 gene.
• To describe the clinical presentation of a patient with STIM1-mediated immunodeficiency.
• To emphasize the importance of suspecting rare genetic syndromes in consanguineous families.

Main Methods:

• Case report of a 23-month-old female patient.
• Genetic analysis to identify STIM1 mutation.
• Clinical evaluation of symptoms including nephrotic syndrome, hypotonia, myopathy, infections, and anemia.

Main Results:

• Identification of a novel frameshift mutation in the STIM1 gene.
• The patient presented with a unique combination of nephrotic syndrome, hypotonia, myopathy, recurrent bacterial infections, thrombocytopenia, and autoimmune hemolytic anemia.
• Treatment involved steroids, cyclosporine, and intravenous immunoglobulin (IVIG), with improved infection control and ongoing rehabilitation.

Conclusions:

• STIM1-mediated immunodeficiency can present with diverse and severe manifestations, including nephrotic syndrome.
• Early suspicion and comprehensive evaluation of rare genetic syndromes in consanguineous families are crucial.
• Integrated clinical and genetic approaches are essential for diagnosing and managing complex genetic disorders like STIM1 immunodeficiency.