The E180splice mutation in the GHR gene causing laron syndrome: Witness of a Sephardic Jewish exodus from the Iberian Peninsula to the New World?

Fernanda T. Gonçalves, Cintia Fridman, Emília M. Pinto, Jaime Guevara-Aguirre, Orit Shevah, Arlan L. Rosembloom, Vivian Hwa, Fernando Cassorla, Ron G. Rosenfeld, Theresa S.S. Lins, Durval Damiani, Ivo J.P. Arnhold, Zvi Laron, Alexander A.L. Jorge

Research output: Contribution to journalArticle

10 Scopus citations

Abstract

Laron syndrome (LS) is a genetic disorder caused by mutations in the growth hormone receptor (GHR) gene. The most frequent GHR mutation is E180splice (rs121909360), which was initially found in an inbred population of Spanish descent in Ecuador and subsequently in Israel, Brazil, Chile, and the United States. The aim of the present study is to determine if the E180splice mutation arose from a common origin. We studied 22 patients with LS from Ecuador, Israel (of Moroccan origin), Brazil, Chile, and the United States (of Mexican origin) who were homozygous for the E180splice mutation and compared them to control individuals for markers surrounding the GHR, intragenic polymorphisms, and Y-chromosome STR. An identical haplotype was found in all but one of the subjects carrying the E180splice mutation: D5S665: 150/150; D5S2082: 192/192; D5S2087: 246/246; rs6179 G/G; and rs6180 C/C. One patient differed from the others only at D5S2082 (168/192). This haplotype is rare (∼1%) in control individuals and confirmed that the E180splice-associated haplotype was not derived from independent origins but represented recombination from a common ancestor. The analysis of paternal lineage markers showed that 50% belong to haplogroup R1b (found in Portugal and Spain) and 40% to haplogroups J and E (typical in the Middle East and in Eastern European Jews). The germline E180Splice mutation appears to have originated from a single common ancestor. The presence of Y-chromosome markers associated with Sephardic populations in persons harboring the E180splice mutation provides genetic evidence in support of the historical tracking of the exodus of this specific population.

Original languageEnglish (US)
Pages (from-to)1204-1208
Number of pages5
JournalAmerican Journal of Medical Genetics, Part A
Volume164
Issue number5
DOIs
StatePublished - May 2014

Keywords

  • Growth hormone insensitivity
  • Growth hormone receptor
  • Growth hormone receptor deficiency
  • Laron syndrome
  • Lineage markers
  • Mitochondrial haplogroups
  • Y-chromosome haplogroups

ASJC Scopus subject areas

  • Genetics
  • Genetics(clinical)

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    Gonçalves, F. T., Fridman, C., Pinto, E. M., Guevara-Aguirre, J., Shevah, O., Rosembloom, A. L., Hwa, V., Cassorla, F., Rosenfeld, R. G., Lins, T. S. S., Damiani, D., Arnhold, I. J. P., Laron, Z., & Jorge, A. A. L. (2014). The E180splice mutation in the GHR gene causing laron syndrome: Witness of a Sephardic Jewish exodus from the Iberian Peninsula to the New World? American Journal of Medical Genetics, Part A, 164(5), 1204-1208. https://doi.org/10.1002/ajmg.a.36444