1. A RhoA-FRET Biosensor Mouse for Intravital Imaging in Normal Tissue Homeostasis and Disease Contexts.
- Author
-
Nobis M, Herrmann D, Warren SC, Kadir S, Leung W, Killen M, Magenau A, Stevenson D, Lucas MC, Reischmann N, Vennin C, Conway JRW, Boulghourjian A, Zaratzian A, Law AM, Gallego-Ortega D, Ormandy CJ, Walters SN, Grey ST, Bailey J, Chtanova T, Quinn JMW, Baldock PA, Croucher PI, Schwarz JP, Mrowinska A, Zhang L, Herzog H, Masedunskas A, Hardeman EC, Gunning PW, Del Monte-Nieto G, Harvey RP, Samuel MS, Pajic M, McGhee EJ, Johnsson AE, Sansom OJ, Welch HCE, Morton JP, Strathdee D, Anderson KI, and Timpson P
- Subjects
- Animals, Antineoplastic Agents pharmacology, Bone and Bones cytology, Bone and Bones metabolism, Cell Movement drug effects, Dasatinib pharmacology, Erlotinib Hydrochloride pharmacology, Female, Fluorescence Resonance Energy Transfer instrumentation, Gene Expression Regulation, Intestine, Small metabolism, Intestine, Small ultrastructure, Intravital Microscopy instrumentation, Mammary Glands, Animal blood supply, Mammary Glands, Animal drug effects, Mammary Glands, Animal ultrastructure, Mammary Neoplasms, Experimental blood supply, Mammary Neoplasms, Experimental drug therapy, Mammary Neoplasms, Experimental genetics, Mammary Neoplasms, Experimental ultrastructure, Mechanotransduction, Cellular, Mice, Mice, Transgenic, Neutrophils metabolism, Neutrophils ultrastructure, Osteocytes metabolism, Osteocytes ultrastructure, Pancreatic Neoplasms blood supply, Pancreatic Neoplasms drug therapy, Pancreatic Neoplasms genetics, Pancreatic Neoplasms ultrastructure, Time-Lapse Imaging instrumentation, rho GTP-Binding Proteins metabolism, rhoA GTP-Binding Protein, Biosensing Techniques, Fluorescence Resonance Energy Transfer methods, Intravital Microscopy methods, Time-Lapse Imaging methods, rho GTP-Binding Proteins genetics
- Abstract
The small GTPase RhoA is involved in a variety of fundamental processes in normal tissue. Spatiotemporal control of RhoA is thought to govern mechanosensing, growth, and motility of cells, while its deregulation is associated with disease development. Here, we describe the generation of a RhoA-fluorescence resonance energy transfer (FRET) biosensor mouse and its utility for monitoring real-time activity of RhoA in a variety of native tissues in vivo. We assess changes in RhoA activity during mechanosensing of osteocytes within the bone and during neutrophil migration. We also demonstrate spatiotemporal order of RhoA activity within crypt cells of the small intestine and during different stages of mammary gestation. Subsequently, we reveal co-option of RhoA activity in both invasive breast and pancreatic cancers, and we assess drug targeting in these disease settings, illustrating the potential for utilizing this mouse to study RhoA activity in vivo in real time., (Copyright © 2017 The Author(s). Published by Elsevier Inc. All rights reserved.)
- Published
- 2017
- Full Text
- View/download PDF