Gramatikov, I. M. T. | bioRxiv Science

bioRxiv2023

Screening in serum-derived medium reveals differential response to compounds targeting metabolism

INTRODUCTION INTRODUCTION RESULTS DISCUSSION KEY RESOURCES TABLE CONTACT FOR REAGENT AND... EXPERIMENTAL MODEL AND SUBJECT... METHOD DETAILS QUANTIFICATION AND STATISTICAL... Data resources DATA AND SOFTWARE AVAILABILITY AUTHOR CONTRIBUTIONS DECLARATION OF INTERESTS REFERENCES Studies of cancer cells in standard culture conditions have long been used as a tractable tool for drug discovery. Cell culture provides unparalleled experimental flexibility, scalability, and low cost to identify and understand the response to cancer therapeutics; however, drug responses in culture are not always predictive of drug response in animal models or in patients1 ...

cancer biology↗

bioRxiv2022

Ablative radiotherapy improves survival in autochthonous cancer mouse models

Genetically engineered mouse models (GEMMs) of cancer are powerful tools to study mechanisms of disease progression and therapy response, yet little is known about how these models respond to multimodality therapy used for curative intent in patients. Radiation therapy (RT) is frequently used to treat localized cancers with curative intent, delay progression of oligometastases, and palliate symptoms of metastatic disease. RT can be combined with surgery, systemic therapy, and/or immunotherapy for definitive treatment of solid tumors. Here we report the development, testing, and validation of a murine platform that faithfully emulates human stereotactic ablative radiotherapy (SABR). We demonstrate that SABR regimens used in clinical practice can be effectively delivered in mouse models and establish the intestinal tract as the dose limiting organ for abdominopelvic radiation with notable, but transient, lymphodepletion. SABR alters tumor stroma and immune environment, improves survival in GEMMs of primary prostate and colorectal cancer, and synergizes with androgen deprivation in prostate cancer. While SABR is capable of fully ablating xenografts it is unable to completely eradicate disease in GEMMs. These data show that some GEMMs are resistant to curative therapy suggesting the existence of treatment-resistant persister cells in these models.

cancer biology↗