gLAMP Hydrogel Assay for Rapid Microbial Detection

The patent employs disposable microfluidic chips with integrated reaction chambers and reagent reservoirs that eliminate the need for expensive, complex instrumentation. The chip-based system is designed for single-use, replacing costly qPCR instruments with simple, portable reading devices that can detect amplification signals without requiring sophisticated thermal cycling equipment or specialized laboratories.

The patent introduces isothermal amplification as an intermediary step between sample collection and detection, replacing the complex thermal cycling process of qPCR. This intermediary method uses constant-temperature enzymatic reactions that can be performed in simple water baths or heating blocks, significantly reducing instrument complexity while maintaining rapid detection capabilities.

The patent implements an internal reference system where the microfluidic chip contains built-in control elements and reference wells that self-calibrate during the assay. The system uses internal controls embedded in the chip design to automatically correct for variations, eliminating dependence on external commercial standard reference materials and ensuring consistent quantification across different runs and locations.

The patent incorporates pre-loaded reagent reservoirs and pre-prepared control elements within the microfluidic chip before the assay begins. These preliminary preparations include internal standards and control samples that are automatically processed during the assay, establishing a reliable reference framework prior to sample analysis and ensuring accurate quantification without external standards.

The patent segments the sample processing into distinct compartments within the microfluidic chip, including separate lysis chambers, amplification chambers, and control chambers. This segmentation isolates the target DNA/RNA extraction and amplification from inhibitory environmental substances, allowing the assay to proceed accurately even when samples contain heavy metals or organic matter that would interfere with traditional qPCR.

The patent introduces a specialized buffer system and purification step as intermediaries between sample introduction and amplification. These intermediary components selectively bind or remove inhibitory substances while allowing target nucleic acids to pass through, protecting the enzymatic amplification reaction from inhibition by environmental contaminants.

The patent uses disposable microfluidic chips that replicate the partitioning functionality of digital PCR instruments through physical microcompartments rather than requiring expensive droplet generation or partitioning equipment. Each chip contains pre-formed reaction chambers that serve as discrete partitions, enabling digital-style quantification using simple, inexpensive reading devices instead of costly digital PCR instruments.

The patent replaces the complex mechanical and computational systems of digital PCR instruments with a simplified microfluidic architecture. Instead of using robotic droplet generation, acoustic sorting, or complex image analysis software, the system uses passive microfluidic channel design and simple optical detection to achieve digital quantification, substituting sophisticated mechanical systems with elegant fluidic and optical solutions.