farnesyl-pyrophosphate and Colorectal-Neoplasms

farnesyl-pyrophosphate has been researched along with Colorectal-Neoplasms* in 1 studies

Other Studies

1 other study(ies) available for farnesyl-pyrophosphate and Colorectal-Neoplasms

Article	Year
Inhibition of insulin-like growth factor receptor/AKT/mammalian target of rapamycin axis targets colorectal cancer stem cells by attenuating mevalonate-isoprenoid pathway in vitro and in vivo. Oncotarget, 2015, Jun-20, Volume: 6, Issue:17 We observed a co-upregulation of the insulin-like growth factor receptor (IGF-1R)/AKT/mammalian target of rapamycin (mTOR) [InAT] axis and the mevalonate-isoprenoid biosynthesis (MIB) pathways in colorectal cancer stem cells (CSCs) in an unbiased approach. Hence, we hypothesized that the InAT axis might regulate the MIB pathway to govern colorectal CSCs growth. Stimulation (IGF-1) or inhibition (IGF-1R depletion and pharmacological inhibition of IGF-1R/mTOR) of the InAT axis produced induction or attenuation of CSC growth as well as expression of CSC markers and self-renewal factors respectively. Intriguingly, activation of the InAT axis (IGF-1) caused significant upregulation of the MIB pathway genes (both mRNA and protein); while its inhibition produced the opposite effects in colonospheres. More importantly, supplementation with dimethylallyl- and farnesyl-PP, MIB metabolites downstream of isopentenyl-diphosphate delta isomerase (IDI), but not mevalonate and isopentenyl-pp that are upstream of IDI, resulted in a near-complete reversal of the suppressive effect of the InAT axis inhibitors on CSCs growth. The latter findings suggest a specific regulation of the MIB pathway by the InAT axis distal to the target of statins that inhibit 3-hydroxy-3-methyl-glutaryl-CoA reductase (HMGCR). Effects of IGF-1R inhibition on colonic CSCs proliferation and the MIB pathway were confirmed in an 'in vivo' HCT-116 xenograft model. These observations establish a novel mechanistic link between the InAT axis that is commonly deregulated in colorectal cancer and the MIB pathway in regulation of colonic CSCs growth. Hence, the InAT-MIB corridor is a novel target for developing paradigm shifting optimum anti-CSCs therapies for colorectal cancer. Topics: Animals; Apoptosis; Carbon-Carbon Double Bond Isomerases; Cell Proliferation; Colorectal Neoplasms; HCT116 Cells; Hemiterpenes; Humans; Mevalonic Acid; Mice; Mice, Inbred NOD; Mice, SCID; Neoplasm Transplantation; Neoplastic Stem Cells; Organophosphorus Compounds; Polyisoprenyl Phosphates; Proto-Oncogene Proteins c-akt; Receptor, IGF Type 1; RNA, Messenger; Sesquiterpenes; Spheroids, Cellular; Terpenes; TOR Serine-Threonine Kinases; Transplantation, Heterologous; Tumor Cells, Cultured	2015

Article

Year

Inhibition of insulin-like growth factor receptor/AKT/mammalian target of rapamycin axis targets colorectal cancer stem cells by attenuating mevalonate-isoprenoid pathway in vitro and in vivo.

Oncotarget, 2015, Jun-20, Volume: 6, Issue:17

We observed a co-upregulation of the insulin-like growth factor receptor (IGF-1R)/AKT/mammalian target of rapamycin (mTOR) [InAT] axis and the mevalonate-isoprenoid biosynthesis (MIB) pathways in colorectal cancer stem cells (CSCs) in an unbiased approach. Hence, we hypothesized that the InAT axis might regulate the MIB pathway to govern colorectal CSCs growth. Stimulation (IGF-1) or inhibition (IGF-1R depletion and pharmacological inhibition of IGF-1R/mTOR) of the InAT axis produced induction or attenuation of CSC growth as well as expression of CSC markers and self-renewal factors respectively. Intriguingly, activation of the InAT axis (IGF-1) caused significant upregulation of the MIB pathway genes (both mRNA and protein); while its inhibition produced the opposite effects in colonospheres. More importantly, supplementation with dimethylallyl- and farnesyl-PP, MIB metabolites downstream of isopentenyl-diphosphate delta isomerase (IDI), but not mevalonate and isopentenyl-pp that are upstream of IDI, resulted in a near-complete reversal of the suppressive effect of the InAT axis inhibitors on CSCs growth. The latter findings suggest a specific regulation of the MIB pathway by the InAT axis distal to the target of statins that inhibit 3-hydroxy-3-methyl-glutaryl-CoA reductase (HMGCR). Effects of IGF-1R inhibition on colonic CSCs proliferation and the MIB pathway were confirmed in an 'in vivo' HCT-116 xenograft model. These observations establish a novel mechanistic link between the InAT axis that is commonly deregulated in colorectal cancer and the MIB pathway in regulation of colonic CSCs growth. Hence, the InAT-MIB corridor is a novel target for developing paradigm shifting optimum anti-CSCs therapies for colorectal cancer.

Topics: Animals; Apoptosis; Carbon-Carbon Double Bond Isomerases; Cell Proliferation; Colorectal Neoplasms; HCT116 Cells; Hemiterpenes; Humans; Mevalonic Acid; Mice; Mice, Inbred NOD; Mice, SCID; Neoplasm Transplantation; Neoplastic Stem Cells; Organophosphorus Compounds; Polyisoprenyl Phosphates; Proto-Oncogene Proteins c-akt; Receptor, IGF Type 1; RNA, Messenger; Sesquiterpenes; Spheroids, Cellular; Terpenes; TOR Serine-Threonine Kinases; Transplantation, Heterologous; Tumor Cells, Cultured

2015