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In healthcare diagnostics, laboratory tests play a crucial role in identifying and diagnosing a wide range of medical conditions. However, interpreting test results is not always straightforward. An abnormal test result does not always confirm the presence of a disease, just as a normal result does not guarantee its absence. To assess the reliability of these diagnostic tools, healthcare practitioners rely on two key statistical indicators: sensitivity and specificity.
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A urine culture and sensitivity test is a diagnostic procedure used to identify urinary tract bacterial infections and determine the most effective antibiotics for treatment. This test is generally preferred when a patient shows manifestations of a urinary tract infection, such as frequent or painful urination, cloudy or foul-smelling urine, or lower abdominal pain.Purpose of the TestThe primary goals of a urine culture and sensitivity test are to:Determine the specific bacteria causing the...
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Related Experiment Video

Updated: Feb 3, 2026

A Simple and Inexpensive Method for Determining Cold Sensitivity and Adaptation in Mice
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Aldosterone-sensitive HSD2 neurons in mice.

Silvia Gasparini1, Jon M Resch2, Sowmya V Narayan1

  • 1Department of Neurology, University of Iowa, PBDB 1320, 169 Newton Rd., Iowa City, IA, 52246, USA.

Brain Structure & Function
|October 22, 2018
PubMed
Summary
This summary is machine-generated.

Sodium deficiency triggers aldosterone release, impacting brain neurons to cause mood changes and salt cravings. Researchers identified specific brainstem neurons sensitive to aldosterone, revealing their projections and potential role in hyperaldosteronism symptoms.

Keywords:
11-Beta-hydroxysteroid dehydrogenase type 2AldosteroneAngiotensin IIDietary sodiumDietary sodium deficiencyDietary sodium deprivationMineralocorticoid receptorNucleus of the solitary tractSalt appetiteSodium appetite

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Area of Science:

  • Neuroscience
  • Endocrinology
  • Molecular Biology

Background:

  • Aldosterone, a hormone, influences brain function beyond epithelial tissues, contributing to dysphoria and salt appetite.
  • Neurons expressing 11-beta-hydroxysteroid dehydrogenase type 2 (HSD2) are key aldosterone-sensitive cells.

Purpose of the Study:

  • To precisely characterize HSD2 neurons in the adult brain.
  • To investigate the developmental expression and adult distribution of HSD2 neurons.
  • To map the axonal projections of these HSD2 neurons.

Main Methods:

  • Immunolabeling and in situ hybridization in mice.
  • Fate mapping and Cre-conditional axon tracing.
  • Dual retrograde tracing techniques.

Main Results:

  • HSD2 neurons are localized to a specific brainstem region with a permeable blood-brain barrier in adult mice.
  • These neurons express HSD2, mineralocorticoid receptor (Nr3c2), angiotensin receptor (Agtr1a), vesicular glutamate transporter 2 (Slc17a6), Phox2b, and Nxph4.
  • Axons project to the parabrachial complex (PB) and the ventrolateral bed nucleus of the stria terminalis (BSTvL), with largely separate populations projecting to each target.

Conclusions:

  • A distinct population of HSD2 neurons in the brainstem projects to key areas involved in emotional and homeostatic regulation.
  • These projections suggest a role for HSD2 neurons in mediating the dysphoric and anhedonic symptoms associated with hyperaldosteronism.