In rat liver tissue exposed to fed conditions, vasopressin increases glucose release, but this increase is lower when insulin is present or when the adrenal glands are removed.
See the scientific wording
Vasopressin stimulates glucose release from perfused rat liver tissue under fed conditions, and this stimulation is attenuated in the presence of insulin or following adrenal gland removal.
Correlational — new studies may shift this
ObservationalOne low-scoring study links this claim to the outcome, but causation is not established.
What the research says
1 study reviewedSupporting (1)
The control by vasopressin of carbohydrate and lipid metabolism in the perfused rat liver.
Case-Control StudyAnimal
In a lab experiment with rat livers, the hormone vasopressin made the liver release more sugar, but when insulin was added or the adrenal glands were removed, that sugar boost was weaker—showing that other hormones can turn down vasopressin’s effect.
Contradicting (0)
No contradicting studies found yet
That doesn't mean it's settled — it just means no study has tested the opposite.
Quality-weighted scoring: we follow the GRADE framework — each study is rated High, Moderate, Low, or Very Low based on study design, methodology rigor, and risk of bias. A single high-quality RCT can outweigh several weaker observational studies.
Scores reflect study quality, not just count.
Vasopressin binds to liver cells and triggers a signal that breaks down stored sugar into glucose, but this only works fully when cortisol is present; insulin blocks this signal, preventing glucose release.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting study
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In rat liver tissue exposed to fed conditions, vasopressin increases glucose release, but this increase is lower when insulin is present or when the adrenal glands are removed.
Mechanism
1 studyVasopressin tells the liver to break down stored sugar into glucose, but only if cortisol is around to help. Insulin stops this process from happening. Without cortisol, vasopressin cannot fully trigger sugar release. Without cortisol or with insulin, the liver releases less glucose.
Vasopressin binds to liver cells and triggers a signal that breaks down stored sugar into glucose, but this only works fully when cortisol is present; insulin blocks this signal, preventing glucose release.
Vasopressin binds to V1 receptors on hepatocytes.
V1 receptor activation triggers intracellular calcium mobilization and protein kinase C activation, initiating glycogenolysis.
Cortisol maintains the expression and activity of enzymes required for glycogen breakdown, enabling full glucose release.
Insulin suppresses the glycogenolytic signaling cascade initiated by vasopressin, reducing glucose output.
Less supported by current evidence, but not ruled out
Vasopressin causes liver cells to release potassium ions rapidly, which may reflect membrane changes during signaling but does not directly drive glucose release.
Vasopressin binds to V1 receptors on hepatocytes.
Receptor activation opens calcium-activated or voltage-gated potassium channels.
Potassium ions exit hepatocytes in a transient burst.
Evidence from Studies
Supporting (1)
Community contributions welcome
The control by vasopressin of carbohydrate and lipid metabolism in the perfused rat liver.
In a lab experiment with rat livers, the hormone vasopressin made the liver release more sugar, but when insulin was added or the adrenal glands were removed, that sugar boost was weaker—showing that other hormones can turn down vasopressin’s effect.
Contradicting (0)
Community contributions welcome
Score Breakdown
No multi-axis breakdown available yet. The overall Pro / Against score above is the best signal.
- No clinical evidence is available; the score reflects mechanistic plausibility only.
What Would Prove This
Per GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this claim, ordered from strongest to weakest.
Systematic Review of Vasopressin, Insulin, and Adrenal Hormones on Hepatic Glucose Output in Animal Models
Systematic review and meta-analysis of all controlled animal studies measuring hepatic glucose output in response to vasopressin, with and without insulin or adrenal gland removal, across multiple laboratories and models.
Randomized Controlled Trial of Vasopressin Infusion with and without Insulin or Adrenalectomy on Hepatic Glucose Output in Rats
Randomized assignment of perfused rat liver preparations to four groups: vasopressin alone, vasopressin + insulin, vasopressin + adrenalectomy, and control; measuring glucose output over 60 minutes.
Cohort Study of Hepatic Glucose Output in Rats with Varying Insulin Levels and Adrenal Status Following Vasopressin Exposure
Prospective observation of glucose output in a cohort of rats with naturally varying insulin levels and adrenal gland integrity following standardized vasopressin perfusion.
In Vitro Study of Vasopressin-Induced Glucose Release in Isolated Rat Hepatocytes with and without Insulin or Corticosterone Exposure
Isolated rat hepatocytes exposed to vasopressin, vasopressin + insulin, or vasopressin + corticosterone; measuring glucose production over 30 minutes in controlled media.
Animal Model Study of Hepatic Glucose Output in Rats with Adrenalectomy and Insulin Infusion During Vasopressin Stimulation
Rats undergo adrenalectomy or sham surgery, receive insulin infusion or saline, then receive vasopressin infusion; hepatic glucose output measured via portal vein sampling over 90 minutes.