TY - JOUR
T1 - PIM1 targeted degradation prevents the emergence of chemoresistance in prostate cancer
AU - Torres-Ayuso, Pedro
AU - Katerji, Meghri
AU - Mehlich, Dawid
AU - Lookingbill, Sophia A.
AU - Sabbasani, Venkata R.
AU - Liou, Hope
AU - Casillas, Andrea L.
AU - Chauhan, Shailender S.
AU - Serwa, Remigiusz
AU - Rubin, Maxine R.
AU - Marusiak, Anna A.
AU - Swenson, Rolf E.
AU - Warfel, Noel A.
AU - Brognard, John
N1 - Publisher Copyright:
© 2023
PY - 2024/2/15
Y1 - 2024/2/15
N2 - PIM kinases have important pro-tumorigenic roles and mediate several oncogenic traits, including cell proliferation, survival, and chemotherapeutic resistance. As a result, multiple PIM inhibitors have been pursued as investigational new drugs in cancer; however, response to PIM inhibitors in solid tumors has fallen short of expectations. We found that inhibition of PIM kinase activity stabilizes protein levels of all three PIM isoforms (PIM1/2/3), and this can promote resistance to PIM inhibitors and chemotherapy. To overcome this effect, we designed PIM proteolysis targeting chimeras (PROTACs) to target PIM for degradation. PIM PROTACs effectively downmodulated PIM levels through the ubiquitin-proteasome pathway. Importantly, degradation of PIM kinases was more potent than inhibition of catalytic activity at inducing apoptosis in prostate cancer cell line models. In conclusion, we provide evidence of the advantages of degrading PIM kinases versus inhibiting their catalytic activity to target the oncogenic functions of PIM kinases.
AB - PIM kinases have important pro-tumorigenic roles and mediate several oncogenic traits, including cell proliferation, survival, and chemotherapeutic resistance. As a result, multiple PIM inhibitors have been pursued as investigational new drugs in cancer; however, response to PIM inhibitors in solid tumors has fallen short of expectations. We found that inhibition of PIM kinase activity stabilizes protein levels of all three PIM isoforms (PIM1/2/3), and this can promote resistance to PIM inhibitors and chemotherapy. To overcome this effect, we designed PIM proteolysis targeting chimeras (PROTACs) to target PIM for degradation. PIM PROTACs effectively downmodulated PIM levels through the ubiquitin-proteasome pathway. Importantly, degradation of PIM kinases was more potent than inhibition of catalytic activity at inducing apoptosis in prostate cancer cell line models. In conclusion, we provide evidence of the advantages of degrading PIM kinases versus inhibiting their catalytic activity to target the oncogenic functions of PIM kinases.
KW - PIM kinases
KW - PROTAC
KW - chemoresistance
KW - prostate cancer
KW - proteolysis
KW - targeted therapeutics
UR - http://www.scopus.com/inward/record.url?scp=85180311125&partnerID=8YFLogxK
UR - https://pubmed.ncbi.nlm.nih.gov/38016478/
U2 - 10.1016/j.chembiol.2023.10.023
DO - 10.1016/j.chembiol.2023.10.023
M3 - Article
C2 - 38016478
AN - SCOPUS:85180311125
SN - 2451-9456
VL - 31
SP - 326-337.e11
JO - Cell Chemical Biology
JF - Cell Chemical Biology
IS - 2
ER -