The Heart and Blood Vessels Produce More Adrenomedullin During Sepsis
Adrenomedullin is locally upregulated in cardiac and vascular tissue during both early and late sepsis, with immunostaining localizing it to endothelial and smooth muscle cells, not just increased blood levels.
Quick Facts
What This Study Found
Adrenomedullin was locally upregulated in cardiac and aortic endothelial and smooth muscle cells during both early (hyperdynamic) and late (hypodynamic) sepsis stages, establishing cardiovascular tissue as a primary source.
Key Numbers
How They Did This
Animal study in rat sepsis model. Adrenomedullin levels measured in cardiac and aortic tissue by radioimmunoassay. Cellular localization determined by immunohistochemistry during early and late sepsis.
Why This Research Matters
Knowing the cardiovascular system produces its own vasodilatory peptide during sepsis helps explain the hemodynamic changes and could identify targets for managing septic cardiovascular dysfunction.
The Bigger Picture
The cardiovascular system doesn't just passively respond to sepsis — it actively produces vasodilatory peptides. This autocrine/paracrine response may be protective initially but contribute to circulatory failure as sepsis progresses.
What This Study Doesn't Tell Us
Rat model. Tissue upregulation correlates with but doesn't prove contribution to hemodynamic changes. The functional consequence of local versus circulating ADM was not determined.
Questions This Raises
- ?Does blocking local ADM production improve septic hemodynamics?
- ?Is cardiac ADM production protective or harmful in late sepsis?
- ?Can ADM levels in tissue predict sepsis severity?
Trust & Context
- Key Stat:
- Local production The heart and aorta produce their own adrenomedullin during sepsis — elevated blood levels aren't just from distant sources
- Evidence Grade:
- Preliminary animal evidence with clear immunohistochemical localization and tissue-level quantification during controlled sepsis stages.
- Study Age:
- Published in 1999. Adrenomedullin's cardiovascular role in sepsis has been confirmed, with ADM-targeted therapies now in clinical trials.
- Original Title:
- Adrenomedullin is upregulated in the heart and aorta during the early and late stages of sepsis.
- Published In:
- Biochimica et biophysica acta, 1453(2), 273-83 (1999)
- Authors:
- Zhou, M(3), Chaudry, I H(4), Wang, P(4)
- Database ID:
- RPEP-00571
Evidence Hierarchy
Tests effects in animals (usually mice or rats), not humans.
What do these levels mean? →Frequently Asked Questions
Why does the heart make adrenomedullin during infection?
Adrenomedullin relaxes blood vessels and may protect tissues during the stress of sepsis. The heart producing it locally suggests a self-protective response to maintain blood flow during infection.
Can this be targeted for sepsis treatment?
Understanding where ADM comes from during sepsis helps design interventions. ADM-targeting therapies (like adrecizumab) are being tested in clinical trials for septic shock.
Read More on RethinkPeptides
Cite This Study
https://rethinkpeptides.com/research/RPEP-00571APA
Zhou, M; Chaudry, I H; Wang, P. (1999). Adrenomedullin is upregulated in the heart and aorta during the early and late stages of sepsis.. Biochimica et biophysica acta, 1453(2), 273-83.
MLA
Zhou, M, et al. "Adrenomedullin is upregulated in the heart and aorta during the early and late stages of sepsis.." Biochimica et biophysica acta, 1999.
RethinkPeptides
RethinkPeptides Research Database. "Adrenomedullin is upregulated in the heart and aorta during ..." RPEP-00571. Retrieved from https://rethinkpeptides.com/research/zhou-1999-adrenomedullin-is-upregulated-in
Access the Original Study
Study data sourced from PubMed, a service of the U.S. National Library of Medicine, National Institutes of Health.
This study breakdown was produced by the RethinkPeptides research team. We analyze and report published research findings without making health recommendations. All interpretations are based solely on the published abstract and study data.