TY - JOUR
T1 - PRMT1-dependent regulation of RNA metabolism and DNA damage response sustains pancreatic ductal adenocarcinoma
AU - Giuliani, Virginia
AU - Miller, Meredith A.
AU - Liu, Chiu Yi
AU - Hartono, Stella R.
AU - Class, Caleb A.
AU - Bristow, Christopher A.
AU - Suzuki, Erika
AU - Sanz, Lionel A.
AU - Gao, Guang
AU - Gay, Jason P.
AU - Feng, Ningping
AU - Rose, Johnathon L.
AU - Tomihara, Hideo
AU - Daniele, Joseph R.
AU - Peoples, Michael D.
AU - Bardenhagen, Jennifer P.
AU - Geck Do, Mary K.
AU - Chang, Qing E.
AU - Vangamudi, Bhavatarini
AU - Vellano, Christopher
AU - Ying, Haoqiang
AU - Deem, Angela K.
AU - Do, Kim Anh
AU - Genovese, Giannicola
AU - Marszalek, Joseph R.
AU - Kovacs, Jeffrey J.
AU - Kim, Michael
AU - Fleming, Jason B.
AU - Guccione, Ernesto
AU - Viale, Andrea
AU - Maitra, Anirban
AU - Emilia Di Francesco, M.
AU - Yap, Timothy A.
AU - Jones, Philip
AU - Draetta, Giulio
AU - Carugo, Alessandro
AU - Chedin, Frederic
AU - Heffernan, Timothy P.
N1 - Publisher Copyright:
© 2021, The Author(s).
PY - 2021/12/1
Y1 - 2021/12/1
N2 - Pancreatic ductal adenocarcinoma (PDAC) is an aggressive cancer that has remained clinically challenging to manage. Here we employ an RNAi-based in vivo functional genomics platform to determine epigenetic vulnerabilities across a panel of patient-derived PDAC models. Through this, we identify protein arginine methyltransferase 1 (PRMT1) as a critical dependency required for PDAC maintenance. Genetic and pharmacological studies validate the role of PRMT1 in maintaining PDAC growth. Mechanistically, using proteomic and transcriptomic analyses, we demonstrate that global inhibition of asymmetric arginine methylation impairs RNA metabolism, which includes RNA splicing, alternative polyadenylation, and transcription termination. This triggers a robust downregulation of multiple pathways involved in the DNA damage response, thereby promoting genomic instability and inhibiting tumor growth. Taken together, our data support PRMT1 as a compelling target in PDAC and informs a mechanism-based translational strategy for future therapeutic development. Statement of significance PDAC is a highly lethal cancer with limited therapeutic options. This study identified and characterized PRMT1-dependent regulation of RNA metabolism and coordination of key cellular processes required for PDAC tumor growth, defining a mechanism-based translational hypothesis for PRMT1 inhibitors.
AB - Pancreatic ductal adenocarcinoma (PDAC) is an aggressive cancer that has remained clinically challenging to manage. Here we employ an RNAi-based in vivo functional genomics platform to determine epigenetic vulnerabilities across a panel of patient-derived PDAC models. Through this, we identify protein arginine methyltransferase 1 (PRMT1) as a critical dependency required for PDAC maintenance. Genetic and pharmacological studies validate the role of PRMT1 in maintaining PDAC growth. Mechanistically, using proteomic and transcriptomic analyses, we demonstrate that global inhibition of asymmetric arginine methylation impairs RNA metabolism, which includes RNA splicing, alternative polyadenylation, and transcription termination. This triggers a robust downregulation of multiple pathways involved in the DNA damage response, thereby promoting genomic instability and inhibiting tumor growth. Taken together, our data support PRMT1 as a compelling target in PDAC and informs a mechanism-based translational strategy for future therapeutic development. Statement of significance PDAC is a highly lethal cancer with limited therapeutic options. This study identified and characterized PRMT1-dependent regulation of RNA metabolism and coordination of key cellular processes required for PDAC tumor growth, defining a mechanism-based translational hypothesis for PRMT1 inhibitors.
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U2 - 10.1038/s41467-021-24798-y
DO - 10.1038/s41467-021-24798-y
M3 - Article
C2 - 34330913
AN - SCOPUS:85111617627
SN - 2041-1723
VL - 12
JO - Nature communications
JF - Nature communications
IS - 1
M1 - 4626
ER -