High density self-contained biological analysis
Devices, containers, and methods are provided for performing biological analysis in a closed environment. Illustrative biological analyses include high density nucleic acid amplification and detection and immuno-PCR.
1. A container for performing a plurality of reactions on a fluid sample in a closed system comprising:
a high density reaction zone provided in the closed system comprising:
a channel for receiving the fluid sample into the high density reaction zone;
a plurality of high density reaction wells fluidly connected to the channel, each high density reaction well comprising one or more reagents; and
a chemical barrier that minimizes cross-contamination between high density reaction wells upon introduction of the fluid sample to the high density reaction zone, wherein the chemical barrier conditionally releases the one or more reagents into the fluid sample introduced into the high density reaction well by heating or slow release.
2. The container of claim 1 wherein the chemical barrier is a substance that is a solid or gel at storage temperatures, but the substance is a liquid at PCR thermal cycling temperatures.
3. The container of claim 1 further comprising:
a sample injection port for introducing the fluid sample into the container,
a cell lysis zone configured for lysing cells or spores located in the fluid sample, the cell lysis zone fluidly connected to the sample injection port,
a nucleic acid preparation zone fluidly connected to the cell lysis zone, the nucleic acid preparation zone configured for purifying nucleic acids, and
a first-stage reaction zone fluidly connected to the nucleic acid preparation zone and the high density reaction zone, the first stage reaction zone comprising a first-stage reaction blister configured for first-stage amplification of the fluid sample,
wherein the cell lysis zone, the nucleic acid preparation zone, the first stage reaction zone and the high density reaction zone are all provided within the closed system.
4. The container of claim 1 wherein the container comprises a flexible layer that can be pressed against the high density reaction well to seal a portion of the fluid sample in each of the plurality of wells.