The Small Intestine Becomes a Major Source of the Vasodilator Adrenomedullin During Sepsis
The small intestine significantly increased adrenomedullin production during sepsis, contributing to the elevated circulating ADM levels that drive vasodilation and potential cardiovascular collapse.
Quick Facts
What This Study Found
Small intestinal ADM mRNA and protein were significantly upregulated during polymicrobial sepsis, with the gut releasing ADM into portal circulation, establishing the intestine as a major source of circulating ADM during sepsis.
Key Numbers
How They Did This
Animal study in rat sepsis model. ADM mRNA (RT-PCR) and protein (immunohistochemistry, RIA) measured in small intestinal tissue. Portal vein ADM levels assessed for gut contribution to circulating ADM.
Why This Research Matters
The gut is the body's largest interface with bacteria. Its massive ADM production during sepsis could be a response to intestinal bacterial translocation — connecting gut barrier failure to systemic cardiovascular dysfunction.
The Bigger Picture
Sepsis involves gut-to-blood bacterial translocation. The gut's ADM response may initially protect intestinal blood flow but eventually overwhelms the cardiovascular system as sepsis progresses — another aspect of the gut's central role in sepsis.
What This Study Doesn't Tell Us
Rat sepsis model. The relative contribution of gut versus cardiovascular ADM to total circulating levels was not precisely quantified.
Questions This Raises
- ?Does gut ADM protect against intestinal barrier failure?
- ?Could targeting gut ADM production prevent septic hemodynamic collapse?
- ?Does gut ADM contribute to post-infectious hypotension?
Trust & Context
- Key Stat:
- Gut ADM surge The small intestine dramatically increased ADM production during sepsis — the body's largest bacterial interface responding with massive vasodilator output
- Evidence Grade:
- Moderate evidence from a controlled sepsis model with multi-level ADM measurement (mRNA, protein, portal vein levels).
- Study Age:
- Published in 2001. The gut's role in septic hemodynamics through peptide signaling has been further characterized.
- Original Title:
- The small intestine is an important source of adrenomedullin release during polymicrobial sepsis.
- Published In:
- American journal of physiology. Regulatory, integrative and comparative physiology, 281(2), R654-60 (2001)
- Authors:
- Zhou, M(3), Chaudry, I H(4), Wang, P(4)
- Database ID:
- RPEP-00707
Evidence Hierarchy
Tests effects in animals (usually mice or rats), not humans.
What do these levels mean? →Frequently Asked Questions
Why does the gut matter in sepsis?
During sepsis, the gut's barrier breaks down, allowing bacteria to enter the blood. This study shows the gut also floods the body with adrenomedullin — a vasodilator — which may initially protect intestinal blood flow but eventually contributes to dangerous blood pressure drops.
Could gut protection prevent septic shock?
Possibly. If the gut's ADM production drives cardiovascular collapse in sepsis, protecting intestinal barrier function or modulating gut ADM release could prevent the transition from compensated to decompensated shock.
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Cite This Study
https://rethinkpeptides.com/research/RPEP-00707APA
Zhou, M; Chaudry, I H; Wang, P. (2001). The small intestine is an important source of adrenomedullin release during polymicrobial sepsis.. American journal of physiology. Regulatory, integrative and comparative physiology, 281(2), R654-60.
MLA
Zhou, M, et al. "The small intestine is an important source of adrenomedullin release during polymicrobial sepsis.." American journal of physiology. Regulatory, 2001.
RethinkPeptides
RethinkPeptides Research Database. "The small intestine is an important source of adrenomedullin..." RPEP-00707. Retrieved from https://rethinkpeptides.com/research/zhou-2001-the-small-intestine-is
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.