Related Experiment Video

Updated: Aug 14, 2026

Cervical Lymph Duct-Cannulated Rat Model for Assessing Lymphatic Transport from the Head and Brain
08:03

Cervical Lymph Duct-Cannulated Rat Model for Assessing Lymphatic Transport from the Head and Brain

Published on: March 10, 2026

Chronic hypertension impairs lymphatic drainage in deep cervical lymph nodes

Kaiming Xu1, Ankita Bhardwaj1, Sunil Koundal1

  • 1Department of Anesthesiology, Yale School of Medicine, New Haven, Connecticut, USA.

JCI Insight
|August 12, 2026
PubMed

Insights

Chronic hypertension impairs deep cervical lymph node (dcLN) drainage, affecting brain homeostasis. New imaging methods quantify this reduced lymphatic flow, offering insights into brain health linked to systemic diseases.

Area of Science:

  • Neuroscience
  • Physiology
  • Medical Imaging

Background:

  • The glymphatic-meningeal pathway is crucial for brain homeostasis and relies on cervical lymphatic drainage.
  • Current therapies targeting this pathway are limited by the lack of methods to quantify lymphatic drainage function.
  • Understanding lymphatic drainage is key to developing therapies for brain health.

Purpose of the Study:

  • To develop and apply a fluid transport model to DCE-MRI data for quantifying lymphatic drainage through deep cervical lymph nodes (dcLN).
  • To investigate the impact of chronic hypertension on dcLN drainage function.
  • To establish a link between systemic disease and brain health via impaired lymphatic drainage.

Main Methods:

  • Developed a fluid transport model integrating solute transport principles for real-time microflow analysis.
  • Applied the model to dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) data.
  • Compared lymphatic drainage in normotensive Wistar-Kyoto rats with spontaneously hypertensive stroke-prone (SHRSP) rats.

Main Results:

  • The model visualized complex, tortuous lymph streams in normotensive rats.
  • SHRSP rats showed significantly altered fluid dynamics with simpler stream patterns and reduced dcLN flow.
  • Chronic hypertension was demonstrated to adversely affect lymph node drainage function.

Conclusions:

  • Untreated chronic hypertension impairs deep cervical lymph node drainage.
  • Impaired lymphatic drainage may be a mechanism linking systemic diseases like hypertension to brain health.
  • The developed model offers a novel method for quantifying lymphatic drainage in vivo.

Keywords:
AgingHypertensionImmunology

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