Articles by Ashley N. Gilbert in JoVE
Die Erzeugung von Microtumors Mit 3D Human Biogel Kultursystem und Patienten stammGlioblastomZellen für Kinomic Profilieren and Drug Response-Testing Ashley N. Gilbert1, Rachael S. Shevin4, Joshua C. Anderson2, Catherine P. Langford3, Nicholas Eustace2, G. Yancey Gillespie3, Raj Singh4, Christopher D. Willey2 1Biomedical Engineering, University of Alabama at Birmingham, 2Radiation Oncology, University of Alabama at Birmingham, 3Neurosurgery, University of Alabama at Birmingham, 4Vivo Biosciences, Inc.
Other articles by Ashley N. Gilbert on PubMed
Kinomic Profiling of Electromagnetic Navigational Bronchoscopy Specimens: a New Approach for Personalized Medicine PloS One. 2014 | Pubmed ID: 25549342 Researchers are currently seeking relevant lung cancer biomarkers in order to make informed decisions regarding therapeutic selection for patients in so-called "precision medicine." However, there are challenges to obtaining adequate lung cancer tissue for molecular analyses. Furthermore, current molecular testing of tumors at the genomic or transcriptomic level are very indirect measures of biological response to a drug, particularly for small molecule inhibitors that target kinases. Kinase activity profiling is therefore theorized to be more reflective of in vivo biology than many current molecular analysis techniques. As a result, this study seeks to prove the feasibility of combining a novel minimally invasive biopsy technique that expands the number of lesions amenable for biopsy with subsequent ex vivo kinase activity analysis.
Patient-Derived Xenografts As a Model System for Radiation Research Seminars in Radiation Oncology. Oct, 2015 | Pubmed ID: 26384275 The cancer literature is filled with promising preclinical studies demonstrating impressive efficacy for new therapeutics, yet translation of these approaches into clinical successes has been rare, indicating that current methods used to predict efficacy are suboptimal. The most likely reason for the limitation of these studies is the disconnect between preclinical models and cancers treated in the clinic. Specifically, most preclinical models are poor representations of human disease. Immortalized cancer cell lines that dominate the cancer literature may be, in a sense, "paper tigers" that have been selected by decades of culture to be artificially driven by highly targetable proteins. Thus, although effective in treating these cell lines either in vitro or as artificial tumors transplanted from culture into experimental animals as xenografts, the identified therapies would likely underperform in a clinical setting. This inherent limitation applies not only to drug testing but also to experiments with radiation therapy. Indeed, traditional radiobiology methods rely on monolayer culture systems, with emphasis on colony formation and DNA damage assessment that may have limited clinical translation. As such, there has been keen interest in developing tumor explant systems in which patient tumors are directly transplanted into and solely maintained in vivo, using immunocompromised mice. These so-called patient-derived xenografts (PDXs) represent a robust model system that has been garnering support in academia and industry as a superior preclinical approach to drug testing. Likewise, PDX models have the potential to improve radiation research. In this review, we describe how PDX models are currently being used for both drug and radiation testing and how they can be incorporated into a translational research program.