Science Advances
April 6, 2026
A new approach from the Manalis lab enables, for the first time, precise, quantitative measurement of water content within individual samples of complex 3D biological models. In a Science Advances paper, the team demonstrated their technique in patient-derived glioblastoma tumor spheroids. By adapting an industrial-grade steel capillary tube into a mechanical resonator that inertially senses particle mass, the researchers were able to determine spheroid water content and detect changes in response to perturbations.Their approach opens opportunities to study water homeostasis —and, by extension, molecular crowding— and its role in tumor biology and drug response across various experimental systems. It is currently being applied in a Bridge Project collaboration between Manalis and co-author Keith Ligon at Dana Farber Cancer Institute.This work has been supported in part by the MIT Center for Precision Cancer Medicine and the Ludwig Center at MIT.