Spatial molecular analysis of tissue
Various methods and devices for spatial molecular analysis from tissue is provided. For example, a method of spatially mapping a tissue sample is provided with a microarray having a plurality of wells, wherein adjacent wells are separated by a shearing surface; overlaying said microarray with a tissue sample; applying a deformable substrate to an upper surface of said tissue sample; applying a force to the deformable substrate, thereby forcing underlying tissue sample into the plurality of wells; shearing the tissue sample along the shearing surface into a plurality of tissue sample islands, with each unique tissue sample island positioned in a unique well; and imaging or quantifying said plurality of tissue sample islands, thereby generating a spatial map of said tissue sample. The imaging and/or quantifying may use a nucleic acid amplification technique.
1. A device for generating a pixelized tissue sample comprising:
a substrate;
a plurality of wells supported by or embedded in said substrate; and
a shearing surface positioned between adjacent wells, wherein the shearing surface has a sharp edge configured to sever a tissue sample under an applied centrifugal force into a plurality of tissue sample islands, with each well containing a unique tissue sample island so as to maintain spatial information of a tissue sample during use.
2. The device of claim 1 , wherein said substrate is silicon, a glass, a metal, an insulator or a dielectric.
3. The device of claim 1 , wherein said shearing surface is a sharp edge of an inverted pyramidal well.
4. The device of claim 1 , wherein each of said wells comprises a target-specific primer set and an enzyme for nucleic acid amplification.
5. The device of claim 1 further comprising a deformable substrate configured to force a tissue sample into each of said plurality of wells and shear the tissue between the shearing surface and the deformable substrate.
6. The device of claim 1 , wherein the substrate comprises undoped silicon.
7. The device of claim 1 comprising enzymes and/or primers disposed on at least one surface of the plurality of wells.
8. The device of claim 1 comprising one or more positively charged functional groups disposed on one or more surfaces of the wells.
9. The device of claim 1 comprising a silanized layer disposed on one or more surfaces of the wells.
10. The device of claim 1 , wherein each of said wells has a volume of less than or equal to 1000 pL.
11. The device of claim 1 , wherein each of said wells has a cross-sectional dimension of less than or equal to 1 mm.
12. The device of claim 1 , wherein each of said wells has a maximum depth of less than or equal to 1 mm.
13. The device of claim 5 , wherein said deformable substrate comprises a polymer.
14. The device of claim 13 , wherein said polymer comprises polymethylsiloxane (PDMS), SU-8, polyethylene glycol (PEG), a photoresist, a PEG-based polymer or any combination thereof.
15. The device of claim 1 , wherein the plurality of wells comprises greater than 500 wells.
16. A system for generating a pixelized tissue sample, the system comprising:
the device of claim 1 ; and
a centrifuge configured to receive the device and a tissue sample and shear the tissue sample at the shearing surface.