C5a and Adrenal Cell Death in Sepsis
Author Information
Author(s): Flierl Michael A., Rittirsch Daniel, Chen Anthony J., Nadeau Brian A., Day Danielle E., Sarma J. Vidya, Huber-Lang Markus S., Ward Peter A.
Primary Institution: Department of Pathology, University of Michigan Medical School, Ann Arbor, Michigan, United States of America
Hypothesis
Excessive levels of C5a might greatly impair the adrenomedullary catecholamine production and/or their release during sepsis, which might result in septic shock.
Conclusion
Excessive C5a during sepsis induces apoptosis in adrenal medullary cells, potentially linking it to septic shock.
Supporting Evidence
- C5a levels were significantly elevated 24 hrs after initiation of experimental sepsis.
- There was significant apoptosis of adrenal medulla cells in rats 24 hrs after CLP.
- Dual-blockade of C5a receptors virtually abolished adrenomedullary apoptosis in vivo.
Takeaway
When the body has too much of a substance called C5a during a serious infection, it can cause important cells in the adrenal glands to die, which might lead to severe health problems.
Methodology
Rats underwent cecal ligation and puncture to induce sepsis, followed by analysis of adrenal cells for apoptosis using TUNEL technique.
Participant Demographics
Specific pathogen-free male Long-Evans rats (300–325 g)
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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