image: Figure 1: Glutamine metabolism effect in tumor microenvironment cells. view more
Credit: 2023 Peña.
“These new findings evidence the necessity of more research in Gln metabolism to define the best therapeutic strategies for cancer patients.”
BUFFALO, NY- August 16, 2023 – A new editorial paper was published in Oncotarget's Volume 14 on August 10, 2023, entitled, “Inhibition of glutamine metabolism: acting on tumoral cells or on tumor microenvironment?”
Cancer cell growth and survival relies on metabolites and metabolic routes different from those used by healthy cells. Glucose and glutamine (Gln) uptake and consumption is increased by many cancer types in order to support their high growth rate. Besides being metabolized to tricarboxylic acid (TCA) cycle precursors, Gln is necessary also for the generation of nitrogen-containing metabolites, such as nucleotides, glucosamine-6-phosphate or nonessential amino acids. Indeed, nitrogen supply has been widely described as limiting for cell cycle progression.
As mitochondrial glutaminase (GLS) directs Gln into the TCA cycle, its inhibition has been suggested as a potential strategy for targeting and blocking Gln metabolism in cancer cells. In fact, GLS inhibitors block cancer cell growth in vivo and in vitro. Based on this premise, several clinical studies have been conducted to test if Gln dysregulation increases cancer patients’ survival. So far, these treatments have not been able to induce a great overall benefit for patients due to the ability of tumor cells to alter their metabolism.
Different authors have described an increase in the oxidative stress after alterations in Gln metabolism in vivo, suggesting the possibility to combine glutamine dysregulation strategies with some other therapies increasing reactive oxidative species to promote cancer cell death. In his new editorial, researcher Raul Peña from Institut Hospital del Mar d'Investigacions Mèdiques (IMIM) discusses a novel mechanism by which Gln, usually concentrated at the tumor periphery, acts as a chemoattractant for cancer-associated fibroblasts (CAFs), enhancing extracellular matrix degradation and facilitating epithelial cancer cell migration and metastasis in vivo.
“Recently, we described a new action of Gln on cancer-associated fibroblasts (CAFs) in breast cancer. [...] In our study, we determined that mesenchymal-like epithelial breast tumor cells and CAFs present a higher dependence on Gln than tumor epithelial breast cancer cells.”
Read the full editorial: DOI: https://doi.org/10.18632/oncotarget.28443
Correspondence to: Raúl Peña
Email: rpena@imim.es
Keywords: glutamine, tumor microenvironment, fibroblasts, CAF, snail
About Oncotarget: Oncotarget (a primarily oncology-focused, peer-reviewed, open access journal) aims to maximize research impact through insightful peer-review; eliminate borders between specialties by linking different fields of oncology, cancer research and biomedical sciences; and foster application of basic and clinical science.
To learn more about Oncotarget, visit Oncotarget.com and connect with us on social media:
Sign up for free Altmetric alerts about this article: https://oncotarget.altmetric.com/details/email_updates?id=10.18632%2Foncotarget.28443
Click here to subscribe to Oncotarget publication updates.
For media inquiries, please contact: media@impactjournals.com.
Oncotarget Journal Office
6666 East Quaker Str., Suite 1A
Orchard Park, NY 14127
Phone: 1-800-922-0957 (option 2)
###
Journal
Oncotarget
Method of Research
Commentary/editorial
Subject of Research
Cells
Article Title
Inhibition of glutamine metabolism: acting on tumoral cells or on tumor microenvironment?
Article Publication Date
10-Aug-2023
COI Statement
Author has no conflicts of interest to declare.