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Related Concept Videos

Adrenergic Receptors: β Subtype01:26

Adrenergic Receptors: β Subtype

β-adrenoceptors have varied sensitivities towards adrenaline, noradrenaline, and isoprenaline. The order of agonist potency is as follows:
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Neurotransmitter binding to these receptors causes activation of adenylyl cyclase resulting in increased concentrations of cAMP and modulation of calcium ion channels within the cell. They are further classified into β1, β2, and β3 subtypes.
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In vitro Functional Characterization of Mouse Colorectal Afferent Endings
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Estrogen-dependent changes in visceral afferent sensitivity.

Raul Sanoja1, Fernando Cervero

  • 1Anesthesia Research Unit (Faculty of Medicine), Faculty of Dentistry, McGill University, Montréal, Québec, Canada.

Autonomic Neuroscience : Basic & Clinical
|July 28, 2009
PubMed
Summary

Estrogen reduction, like that from ovariectomy (OVX), causes chronic pain and hypersensitivity in women. Estrogen therapy can prevent or reverse this pain, highlighting its role in pain modulation.

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Published on: October 25, 2016

Area of Science:

  • Neuroscience
  • Endocrinology
  • Pain Research

Background:

  • Chronic pain and functional pain states disproportionately affect women.
  • Hormonal variations, particularly during the menstrual cycle, influence pain perception in women.
  • Estrogen's role in modulating pain sensitivity is debated, with conflicting reports on its pro- or anti-nociceptive effects.

Purpose of the Study:

  • To investigate the effect of estrogen reduction on pain perception.
  • To determine if estrogen administration can prevent or reverse estrogen-deficiency-induced hyperalgesia.
  • To explore estrogen's role in preventing chronic pain states.

Main Methods:

  • Surgical ovariectomy (OVX) to induce a permanent reduction in estrogen levels.
  • Assessment of mechanical and thermal hyperalgesia in abdominal and pelvic regions.
  • Evaluation of visceral hypersensitivity.
  • Administration of exogenous estrogen to assess its effects on hyperalgesia.

Main Results:

  • Surgical ovariectomy (OVX) induced a slow-onset, long-lasting hyperalgesic state.
  • This hyperalgesia included mechanical and thermal sensitivity in the abdominal and pelvic areas, along with visceral hypersensitivity.
  • Exogenous estrogen administration prevented or reversed the induced hyperalgesia.

Conclusions:

  • A permanent reduction in estrogen levels leads to a chronic hyperalgesic state.
  • Estrogen plays a crucial role in preventing or reversing hyperalgesia and visceral hypersensitivity.
  • Estrogen may be vital in the prevention of chronic pain conditions, particularly in women.