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Norepinephrine transporter function and human cardiovascular disease.

C Schroeder1, J Jordan

  • 1Institute of Clinical Pharmacology, Hannover Medical School, Hannover, Germany.

American Journal of Physiology. Heart and Circulatory Physiology
|October 2, 2012
PubMed
Summary
This summary is machine-generated.

The neuronal norepinephrine transporter (NET) influences cardiovascular regulation differently in the brain and periphery. NET dysfunction is linked to conditions like postural tachycardia syndrome and may impact heart disease progression.

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Area of Science:

  • Neuroscience
  • Cardiovascular Physiology
  • Pharmacology

Background:

  • The neuronal norepinephrine transporter (NET) reuptakes approximately 80-90% of released norepinephrine.
  • NET plays a critical role in cardiovascular sympathetic regulation, with distinct effects in the brain versus peripheral tissues.
  • NET influences sympathetic activity distribution to the vasculature, heart, and kidneys.

Purpose of the Study:

  • To explore the multifaceted roles of NET in cardiovascular sympathetic regulation.
  • To investigate the implications of NET dysfunction in various cardiovascular conditions and syndromes.
  • To assess the potential impact of NET inhibition and dysfunction on cardiovascular health.

Main Methods:

  • Pharmacological studies using NET inhibitors.
  • Analysis of genetic NET dysfunction.
  • Biochemical assessments of NET function in patients with hypertension and heart disease.

Main Results:

  • NET inhibition shows opposing cardiovascular effects in the brain and periphery.
  • Genetic NET dysfunction is associated with postural tachycardia syndrome.
  • Reduced NET function is observed in essential hypertension and common heart diseases, potentially adversely affecting the cardiovascular system.

Conclusions:

  • NET is a key regulator of cardiovascular sympathetic tone with complex regional effects.
  • NET dysfunction is implicated in cardiovascular disorders, including postural tachycardia syndrome and potentially heart disease.
  • Further research is needed to clarify the causal role of NET dysfunction in progressive heart disease and its clinical implications, especially given the prevalence of NET-inhibiting medications.