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Wiley, Integrative Biology, 10(7), p. 1171-1185

DOI: 10.1039/c4ib00291a

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Non-monotonic cellular responses to heterogeneity in talin protein expression-level

This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

Talin is a key cell-matrix adhesion component with a central role in regulating adhesion complex maturation, and thereby various cellular properties including adhesion and migration. However, knockdown studies have produced inconsistent findings regarding the functional influence of talin in these processes. Such discrepancies may reflect non-monotonic responses to talin expression-level variation that are not detectable via canonical binary comparisons of aggregated control versus knockdown cell populations. Here, we deployed an analogue approach to map talin influence across a continuous expression-level spectrum, which we extended with sub-maximal RNAi-mediated talin depletion. Applying correlative imaging to link live cell and fixed immunofluorescence data on a single cell basis, we related per cell talin levels to per cell measures quantitatively defining an array of cellular properties. This revealed both linear and non-linear correspondences between talin expression and cellular properties,