Inhibin: a candidate gene for premature ovarian failure Academic Article uri icon

abstract

  • Premature ovarian failure (POF) occurs in 1% of all women, and in 0.1% of women under the age of 30 years. The mechanisms that give rise to POF are largely unknown. Inhibin has a role in regulating the pituitary secretion of FSH, and is therefore a potential candidate gene for ovarian failure. Using single-stranded conformation polymorphism (SSCP) and DNA sequencing, DNA samples were screened from 43 women with POF for mutations in the three inhibin genes. Two variants were found: a 1032C-->T transition in the INHssA gene in one patient, and a 769G-->A transition in the INHalpha gene in three patients. The INHssA variant appears to be a polymorphism, as there was no change in the amino acid sequence of the gene product. The INHalpha variant resulted in a non-conservative amino acid change, with a substitution from alanine to threonine. This alanine is highly conserved across species, and has the potential to affect receptor binding. The INHalpha variant is significantly associated with POF (3/43 patients; 7%) compared with control samples (1/150 normal controls; 0.7%) (Fisher's exact test, P < 0.035). Further analysis of the inhibin gene in POF patients and matched controls will determine its role in the aetiology of POF.

authors

  • Shelling, Andrew N
  • Burton, Karen A
  • Chand, Ashwini L
  • van Ee, Cynthia C
  • France, John T
  • Farquhar, Cynthia M
  • Milsom, Stella R
  • Love, Donald R
  • Gersak, Ksenija
  • Aittomäki, Kristiina
  • Winship, Ingrid M

publication date

  • December 2000

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