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A Non-random Mouse Model for Pharmacological Reactivation of Mecp2 on the Inactive X Chromosome
Published on: May 22, 2019
Random X chromosome inactivation in a female with a variant of Wiskott-Aldrich syndrome
1Department of Pediatrics, University of Texas Southwestern Medical Center, Dallas 75235-9063, USA.
Insights
This study reports an atypical Wiskott-Aldrich syndrome case in a 15-month-old girl with eczema and infections. Findings suggest a potential autosomal recessive inheritance pattern for this rare immune disorder.
Area of Science:
- Immunology
- Genetics
- Pediatrics
Background:
- Wiskott-Aldrich syndrome (WAS) is a rare X-linked immunodeficiency disorder.
- Typical WAS presents with eczema, thrombocytopenia, and recurrent infections.
Observation:
- A 15-month-old female exhibited eczema, thrombocytopenia, recurrent infections, and failure to thrive.
- Laboratory results revealed low serum IgM and IgG subclasses and abnormal lymphocyte proliferation.
- X chromosome inactivation analysis showed random inactivation.
Findings:
- The patient's presentation and laboratory findings suggest an atypical form of Wiskott-Aldrich syndrome.
- The random X chromosome inactivation pattern is unusual for typical X-linked WAS.
- Autosomal recessive inheritance is proposed as a possible mode of transmission.
Implications:
- This case expands the known clinical spectrum of Wiskott-Aldrich syndrome.
- Identifying atypical inheritance patterns is crucial for accurate genetic counseling and diagnosis.
- Further research is needed to understand the genetic basis of this atypical form of WAS.
Abstract:
A 15-month-old female presented with eczema, thrombocytopenia, recurrent infections and failure to thrive. She had low serum IgM and IgG subclasses and an abnormal lymphocyte proliferative response to periodate in vitro. Molecular X chromosome inactivation analysis, using the polymorphic HUMARA DNA probe, showed that the infant has random X chromosome inactivation. We conclude that she has an atypical form of Wiskott-Aldrich syndrome which may be inherited in an autosomal recessive manner.
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