Peptide hormone
Secretin
Secretin is a peptide hormone whose research also encompasses renal function. Animal studies of its receptor examine water handling separately from responses to changes in acid-base balance.
This is a research reference, not a product offered in the Asciende catalog. Published studies do not establish the identity, purity or availability of a commercial preparation.
Local signaling and experimental context
Record where and how the measurement was made. Presence of a peptide in a system does not establish that a commercial preparation reproduces that system.
- Does the work study an isolated molecule, endogenous secretion or a preparation containing several components?
- Are tissue, species and response measurement specified?
- Does the interpretation distinguish signal detection from demonstration of its function in that model?
Mechanism described in the literature
In research models, signaling through SCTR has been associated with aquaporin distribution within cells and renal bicarbonate excretion. The cited references examine different processes and cell populations.
Other names in the literature
- Secretin
- SCT
Water: channel abundance and location
The 2007 study combined SCTR-deficient mice with in vitro renal experiments. Modified animals showed changes in water consumption, urine volume and aquaporin expression. Experiments also distinguished the presence of AQP2 from its movement to the membrane: abundance and location are different measurements (PMID 17283064).
Bicarbonate: a different renal question
A 2023 investigation examined responses to an acute excess of base in mice and used isolated collecting ducts. SCTR absence impaired base excretion responses and was accompanied by ventilatory changes. Blood, urine and tissue measurements captured several components of physiological adjustment (PMID 37344929).
What deleting a receptor means
SCTR-deficient models examine loss of a pathway throughout development and organismal function. They do not exclusively reproduce a brief exposure to secretin. Global receptor disruption also does not automatically identify the tissue responsible for each phenotype component; isolated-tissue experiments provide complementary comparisons.
Questions and answers
Do both studies measure the same aspect of renal function?
No. One mainly examines water and aquaporins; the other examines bicarbonate and the response to a base load.
Does more AQP2 necessarily mean more membrane AQP2?
No. Total amount and cellular distribution are separate variables in the cited study.
Sources
- Phenotypes developed in secretin receptor-null mice indicated a role for secretin in regulating renal water reabsorption. — Mol Cell Biol, 2007
- Phenotypes developed in secretin receptor-null mice indicated a role for secretin in regulating renal water reabsorption.
- Loss of the Secretin Receptor Impairs Renal Bicarbonate Excretion and Aggravates Metabolic Alkalosis in Mice during Acute Base-Loading. — J Am Soc Nephrol, 2023
- Loss of the Secretin Receptor Impairs Renal Bicarbonate Excretion and Aggravates Metabolic Alkalosis in Mice during Acute Base-Loading.