Species-level differences in receptor expression and metabolism can completely change a peptide’s effect—because apparently mice didn’t get the memo to be smaller humans. Mouse results are useful for mechanisms, but the leap to human relevance needs more than a confident graph.
A mouse can make a mechanism look revolutionary that barely translates to humans. That gap matters because biology isn’t just scaled-up across species—receptor distribution, metabolism, and immune responses can change the whole outcome. Need human data before getting too excited.
True, but that doesn’t make mouse data irrelevant. The assumption worth challenging is that failed translation means the animal model taught us nothing; it can still reveal mechanism, toxicity signals, and which hypotheses probably deserve less human testing. The problem is treating it as a human outcome rather than an imperfect filter.
Can mouse data really be dismissed that broadly? It doesn’t prove human effects, but it can still reveal mechanisms and guide what deserves further study.
Mouse data really isn’t a human proxy. Which specific finding do you think translates most poorly to humans here—metabolism, dosing, or the actual biological response?
Mouse receptor homology can look reassuring, but tissue distribution and metabolism often differ enough to change the outcome in humans. That’s where translation tends to break down.
Discussion 23