Kisspeptin-10 might be the smallest member of the kisspeptin family, but this little peptide punches well above its weight. Like all kisspeptins, it’s derived from the KISS1 gene — which got its chocolate-inspired name from the scientific team that discovered it, in Hershey, PA.
Small though it may be, Kisspeptin-10 has the full biological activity needed to bind to the GPR54 receptor responsible for firing GnRH pulses (and thereby basically keeping the entire reproductive system working).
When scientists first discovered Kisspeptin-10, they were mostly interested in its potential ability to fight cancer. Interest in the peptide for its ability to suppress metastasis was so strong that some of the early literature called it “metastin.” That spotlight shifted as research went on.
A sizeable portion of Kisspeptin-10 research today zooms in on its potential as a fertility treatment. Even more interesting to many is its “secondary role” — early Kisspeptin-10 studies have demonstrated that it can “fix” low libido and arousal challenges caused by mood and mental problems.
That quick overview? It might well be enough for people with no more than a passing interest in Kisspeptin-10. There’s much more to this particular story, however. Stick around if you want to find out what.
Every great discovery comes with a good story. This one starts in a place famous for its chocolate — Hershey, Pennsylvania. There, researchers identified a new gene with the apparent power to fight back against the spread of cancer cells. They called it KISS1, after the little chocolates. No surprise, then, that the peptides this gene produces became “kisspeptins.”
The early buzz was all about cancer. The longer form of the peptide, Kisspeptin-54, was dubbed metastin. A name that stuck. Slightly later research found that the peptide also played a critical part in reproduction. Nobody interested in peptides will be shocked — these chains of amino acids are often great multi-taskers.
The KISS1 protein naturally gets processed into much smaller fragments (as many as 145!), and all of these pieces bind to GPR54. That’s the receptor that activates GnRH, the reproductive hormone that makes LH and FSH — without which puberty, reproduction, and libido don’t “work” in men, women, or other mammals, for that matter.
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