CPSF3 inhibition blocks pancreatic cancer cell proliferation through disruption of core histone mRNA processing.
Abdulrahman A AlahmariAditi H ChaubeyVenkata Soumith JonnakutiArwen A TisdaleCarla D SchwarzAbigail C CornwellKathryn E MaraszekEmily J PatersonMinsuh KimSwati VenkatEduardo Cortes GomezJianmin WangKaterina V GurovaHari Krishna YalamanchiliMichael E FeiginPublished in: RNA (New York, N.Y.) (2024)
Pancreatic ductal adenocarcinoma (PDAC) is a lethal disease with limited effective treatment options, potentiating the importance of uncovering novel drug targets. Here, we target cleavage and polyadenylation specificity factor 3 (CPSF3), the 3' endonuclease that catalyzes mRNA cleavage during polyadenylation and histone mRNA processing. We find that CPSF3 is highly expressed in PDAC and is associated with poor prognosis. CPSF3 knockdown blocks PDAC cell proliferation and colony formation in vitro and tumor growth in vivo. Chemical inhibition of CPSF3 by the small molecule JTE-607 also attenuates PDAC cell proliferation and colony formation, while it has no effect on cell proliferation of nontransformed immortalized control pancreatic cells. Mechanistically, JTE-607 induces transcriptional readthrough in replication-dependent histones, reduces core histone expression, destabilizes chromatin structure, and arrests cells in the S-phase of the cell cycle. Therefore, CPSF3 represents a potential therapeutic target for the treatment of PDAC.
Keyphrases
- cell proliferation
- cell cycle
- poor prognosis
- induced apoptosis
- cell cycle arrest
- small molecule
- pi k akt
- long non coding rna
- dna methylation
- gene expression
- binding protein
- transcription factor
- cell death
- signaling pathway
- dna binding
- emergency department
- dna damage
- endoplasmic reticulum stress
- oxidative stress
- genome wide
- climate change
- risk assessment
- human health
- cardiopulmonary resuscitation
- heat shock
- electronic health record