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Methods for assessing the linkage between pulsatile hormone profiles.

G R Merriam1, N Ma, L Liu

  • 1Reproductive Endocrine Unit, National Institute of Child Health and Human Development, Bethesda, Maryland.

Acta Paediatrica Scandinavica. Supplement
|January 1, 1989
PubMed
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Pulsatile secretion of anterior pituitary hormones may be synchronized. A new method revealed significant physiological synchrony between prolactin and luteinizing hormone (LH) pulses in men.

Area of Science:

  • Endocrinology
  • Neuroendocrinology
  • Hormonal Regulation

Background:

  • Anterior pituitary hormones are typically viewed as independently regulated.
  • However, pulsatile secretion patterns suggest potential synchronization among these hormones.
  • Existing cross-correlation methods may be insufficient to quantify this linkage accurately.

Purpose of the Study:

  • To develop and validate a novel method for quantifying synchronized pulsatile secretion of anterior pituitary hormones.
  • To determine if observed hormonal synchrony exceeds rates expected by random chance.
  • To investigate the physiological linkage between prolactin and luteinizing hormone (LH) secretion.

Main Methods:

  • A new method was developed to estimate hormonal linkage by counting simultaneous and near-simultaneous events within defined temporal windows.

Related Experiment Videos

  • This method was tested using 11 series of luteinizing hormone (LH) and prolactin measurements from normal men.
  • Control analyses included series from different subjects and time-scrambled series to estimate random synchrony rates.

    • Main Results:

    • A significant excess of concordant prolactin and luteinizing hormone (LH) peaks was observed in normal men.
    • The developed method effectively distinguished physiological synchrony from random coincidences.
    • Control analyses confirmed that apparent synchrony in real data significantly exceeded random rates.

    Conclusions:

    • There is significant physiological synchrony between pulsatile prolactin and luteinizing hormone (LH) secretion in normal men.
    • The proposed temporal window method is a robust approach for quantifying hormonal synchrony.
    • This methodology can be broadly applied to study synchronization in various hormonal systems.