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Updated: May 22, 2026
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Brain Death Induction in Mice Using Intra-Arterial Blood Pressure Monitoring and Ventilation via Tracheostomy
Published on: April 17, 2020
Inflammatory immune responses in a reproducible mouse brain death model
Bernhard Floerchinger1, Xiaodong Yuan, Anke Jurisch
1Division of Transplant Surgery and Transplant Surgery Research Laboratory, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA.
Transplant Immunology
|May 3, 2012
Summary
Brain death triggers systemic immune activation, impacting organ donors. Anesthesia with isoflurane, but not ketamine/xylazine, also caused immune responses in this new mouse model.
Area of Science:
- Immunology
- Transplantation Science
- Anesthesiology
Background:
- Brain death negatively impacts donor organ quality and heightens post-transplant immune responses.
- The precise immune activation mechanisms following brain death require further elucidation.
- This study introduces a novel mouse model to investigate these immediate immunological consequences.
Purpose of the Study:
- To establish a reproducible and hemodynamically stable mouse model of brain death.
- To investigate the immediate systemic immune responses following induced brain death.
- To differentiate immune effects of brain death from those of anesthetic agents.
Main Methods:
- Induction of brain death in C57JBl/6 mice under anesthesia (isoflurane or ketamine/xylazine) with continuous ventilation and hemodynamic monitoring.
- Maintenance of normotension through fluid resuscitation.
- Analysis of immune activation via IFNγ-ELispot, mixed lymphocyte reaction (MLR), and flow cytometry for T-cell activation markers (CD28, CD69).
Main Results:
- Brain death induction led to significant systemic immune activation, evidenced by increased splenocyte IFNγ-expression and lymphocyte proliferation (p<0.02, <0.01).
- T-cell activation markers CD28 and CD69 were elevated in brain-dead animals (p<0.03, <0.02).
- Prolonged isoflurane anesthesia in sham controls induced IFNγ-expression and lymphocyte activation, effects not seen with ketamine/xylazine (p<0.04, <0.009).
Conclusions:
- A reproducible and hemodynamically stable mouse model for brain death research was successfully established.
- Both isoflurane and ketamine/xylazine maintained hemodynamic stability during the model's induction.
- Isoflurane anesthesia, independent of brain death, was associated with pro-inflammatory immune activation, highlighting its potential impact in clinical organ donation scenarios.
