Short-stature homeobox gene

Pathology

SHOX was first found during a search for the cause of short stature in women with Turner syndrome, where there is loss of genetic material from the X chromosome, typically by loss of one entire X chromosome.[2]

Since its discovery, the gene has been found to play a role in idiopathic short stature, Léri-Weill dyschondrosteosis, and Langer mesomelic dysplasia.

Gene dosage effects of extra copies of SHOX may be a cause of the increased stature seen in other sex chromosome aneuploidy conditions such as triple X, XYY, Klinefelter, XXYY and similar syndromes.[3]

Genetics and function

SHOX is composed of 6 different exons and is located in the pseudoautosomal region 1 (PAR1) of the X chromosome (Xp22.33) and Y chromosome.[2] Since genes in PAR escape X inactivation, their dosage changes with sex chromosome aneuploidies such as Turner.[4]

Similar genes are present in a variety of animals and insects.

It is a homeobox gene, meaning that it helps to regulate development.

References

  1. "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  2. "SHOX - short stature homeobox - Genetics Home Reference". U.S. National Library of Medicine. 2005-09-01. Archived from the original on 2007-10-12. Retrieved 2008-02-18.
  3. Kanaka-Gantenbein C, Kitsiou S, Mavrou A, Stamoyannou L, Kolialexi A, Kekou K, et al. (2004). "Tall stature, insulin resistance, and disturbed behavior in a girl with the triple X syndrome harboring three SHOX genes: offspring of a father with mosaic Klinefelter syndrome but with two maternal X chromosomes". Hormone Research. 61 (5): 205–10. doi:10.1159/000076532. PMID 14752208. S2CID 41958098.
  4. Raudsepp T, Chowdhary BP (2015). "The Eutherian Pseudoautosomal Region". Cytogenetic and Genome Research. 147 (2–3): 81–94. doi:10.1159/000443157. PMID 26730606.

Further reading

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