TY - JOUR
T1 - GNA13 expression promotes drug resistance and tumor-initiating phenotypes in squamous cell cancers
AU - Rasheed, Suhail Ahmed Kabeer
AU - Leong, Hui Sun
AU - Lakshmanan, Manikandan
AU - Raju, Anandhkumar
AU - Dadlani, Dhivya
AU - Chong, Fui Teen
AU - Shannon, Nicholas B.
AU - Rajarethinam, Ravisankar
AU - Skanthakumar, Thakshayeni
AU - Tan, Ern Yu
AU - Hwang, Jacqueline Siok Gek
AU - Lim, Kok Hing
AU - Tan, Daniel Shao Weng
AU - Ceppi, Paolo
AU - Wang, Mei
AU - Tergaonkar, Vinay
AU - Casey, Patrick J.
AU - Iyer, N. Gopalakrishna
PY - 2018
Y1 - 2018
N2 - Treatment failure in solid tumors occurs due to the survival of specific subpopulations of cells that possess tumor-initiating (TIC) phenotypes. Studies have implicated G protein-coupled-receptors (GPCRs) in cancer progression and the acquisition of TIC phenotypes. Many of the implicated GPCRs signal through the G protein GNA13. In this study, we demonstrate that GNA13 is upregulated in many solid tumors and impacts survival and metastases in patients. GNA13 levels modulate drug resistance and TIC-like phenotypes in patient-derived head and neck squamous cell carcinoma (HNSCC) cells in vitro and in vivo. Blockade of GNA13 expression, or of select downstream pathways, using small-molecule inhibitors abrogates GNA13-induced TIC phenotypes, rendering cells vulnerable to standard-of-care cytotoxic therapies. Taken together, these data indicate that GNA13 expression is a potential prognostic biomarker for tumor progression, and that interfering with GNA13-induced signaling provides a novel strategy to block TICs and drug resistance in HNSCCs.
AB - Treatment failure in solid tumors occurs due to the survival of specific subpopulations of cells that possess tumor-initiating (TIC) phenotypes. Studies have implicated G protein-coupled-receptors (GPCRs) in cancer progression and the acquisition of TIC phenotypes. Many of the implicated GPCRs signal through the G protein GNA13. In this study, we demonstrate that GNA13 is upregulated in many solid tumors and impacts survival and metastases in patients. GNA13 levels modulate drug resistance and TIC-like phenotypes in patient-derived head and neck squamous cell carcinoma (HNSCC) cells in vitro and in vivo. Blockade of GNA13 expression, or of select downstream pathways, using small-molecule inhibitors abrogates GNA13-induced TIC phenotypes, rendering cells vulnerable to standard-of-care cytotoxic therapies. Taken together, these data indicate that GNA13 expression is a potential prognostic biomarker for tumor progression, and that interfering with GNA13-induced signaling provides a novel strategy to block TICs and drug resistance in HNSCCs.
U2 - 10.1038/s41388-017-0038-6
DO - 10.1038/s41388-017-0038-6
M3 - Journal article
C2 - 29255247
AN - SCOPUS:85038409561
SN - 0950-9232
VL - 37
SP - 1340
EP - 1353
JO - Oncogene
JF - Oncogene
IS - 10
ER -