LB-100

Inside the plate · In NPR2

Chemical structure of LB-100
Structure: LB-100, PubChem CID 45101433

In human trialsMeasured in people, not heightBy injectionSmall molecule

An experimental cancer drug that stops NPR2, the receptor CNP works through, being switched off.

An experimental cancer compound, used here as a phosphatase inhibitor. CNP activation of NPR2 requires the receptor to be phosphorylated on multiple serines and threonines, so FGF-induced dephosphorylation lowers cGMP and opposes bone growth; this counteracts that step.

eLife, 2017

Risks. In its first cancer trial in adults it could strain the kidneys, and about one patient in five had a severe side effect that may have been the drug. Nobody has tested it for growth.

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