Contractile effects of retatrutide in isolated mouse atrial preparations.
Neumann J, Ahlrep U, Hofmann B et al. · Naunyn-Schmiedeberg's archives of pharmacology · PMID 40464942
Study summary
Main finding
Retatrutide increased right-atrial beating rate through glucagon-receptor and cAMP-related signaling without increasing left-atrial force in the tested preparations.
Isolated left and right atrial tissue from adult mice was tested with retatrutide and receptor or signaling inhibitors.
What the researchers measured
Contraction force in electrically paced tissue and spontaneous beating rate were measured.
How to read this evidence
Researchers studied cells, isolated tissue, or animals. These experiments can help explain a mechanism, but do not establish benefits or safety in people. Human cells grown in a laboratory also belong in this category.
Results in context
The tested left atria did not show increased force, while right-atrial beating rate increased through a proposed glucagon-receptor pathway. This is not a whole-animal or human cardiac-outcomes study.
What this does not establish
Isolated mouse heart tissue cannot establish human rhythm risk or cardiovascular safety.
Publication & source
Why this paper is included
The compound is a named subject of the publication title.
Publication indexing
Journal Article · Research Support, Non-U.S. Gov't