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  • Title: [Assessing the inactivation pattern in chromosome X among symptomatic carriers and women with haemophilia].
    Author: Mundo-Ayala JN, Jaloma-Cruz AR.
    Journal: Gac Med Mex; 2008; 144(2):171-4. PubMed ID: 18590038.
    Abstract:
    X chromosome inactivation is a stochastic event that occurs early in female embryo development to achieve dosage compensation with males. Certain genetic mechanisms affect the normal process causing a skewed X inactivation pattern which has clinical relevance in female carriers of X-linked recessive disorders, like haemophilia. The most commonly used assay to evaluate the X inactivation pattern is the PCR amplification of the human androgen receptor gene (HUMARA). The use of this technique in bleeding carriers and women with haemophilia allows identifying if their hemorrhagic symptoms are due to an unfavourable lyonization. Furthermore, these studies are important for understanding the X chromosome inactivation process in humans.
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