Deconvolutian analysis of bioassayable LH secretion and half-life in men with idiopathic oligoasthenospermia

A. Reyes-Fuentes, M. E. Chavarría, G. Aguilera, A. Rosado, A. Iranmanesh, J. D. Veldhuis

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

To further investigate the nature of neuroendocrine disturbances of the hypothalamopituitary-gonadal axis in idiopathic male infertility, we studied 12 infertile men with oligoasthenozoospermia and 13 euspermic controls, matched for age and body mass index, by blood withdrawal at 10-min intervals for 8 h to analyse pulsatile release of bioactive LH (b-LH). The rat interstitial cell testosterone (RICT) bioassay was used in conjunction with a recently validated multiparameter deconvolution algorithm, to estimate the endogenous half-life of b-LH, its secretory burst frequency, amplitude, duration and mass. Oligoasthenospermic men exhibited significant (p < 0.05) alterations within the LH axis; namely: (1) a prolonged half-life of b-LH (92 min in euspermic men, 127 min in oligoasthenospermic men); (2) a reduced b-LH secretory burst amplitude (2.2 ± 1.2 IU/l/min in euspermic men, 1.7 ± 0.8 IU/l/min in oligoasthenospermic men); (3) a lower bioactive/immunoactive (b/i) ratio for LH secretory burst amplitude (14 in euspermic men, 4 in oligoasthenospermic men); (4) a reduced b/i ratio in the mass of LH secreted per burst (5.4 in euspermic men, 4.1 in oligoasthenospermic men) and (5) decreased coordinate release of b-LH and testosterone in infertile men, as assessed by cross-correlation analysis. These disturbances differ from the neuroendocrine dysregulation described in other states of male hypogonadotrophism.

Original languageEnglish (US)
Pages (from-to)118-125
Number of pages8
JournalInternational Journal of Andrology
Volume20
Issue number2
DOIs
StatePublished - 1997

Keywords

  • Bioactive LH
  • Luteinizing hormone
  • Male infertility
  • Oligoasthenozoospermia

ASJC Scopus subject areas

  • Endocrinology, Diabetes and Metabolism
  • Reproductive Medicine
  • Urology

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