Design principles for LAMP-CRISPR molecular diagnostics.

Area of Science:

• Biotechnology
• Molecular Diagnostics
• Bioinformatics

Background:

• CRISPR-based nucleic acid detection, using Cas9, Cas12, and Cas13 enzymes, is integrated with isothermal amplification (LAMP).
• This combination enables development of CRISPR-based diagnostic assays for various pathogens, suitable for point-of-care (PoC) applications.
• LAMP-CRISPR diagnostics offer a portable alternative to resource-intensive methods like real-time PCR in resource-limited settings.

Purpose of the Study:

• To critically examine current strategies for designing LAMP-CRISPR assays.
• To provide a detailed, step-by-step guide for developing high-performance LAMP-CRISPR diagnostic tools.
• To address challenges in LAMP-CRISPR assay development, including oligonucleotide design, biochemical integration, and minimizing false positives.

Main Methods:

• Review of current strategies for target sequence selection, oligonucleotide design, and CRISPR system integration.
• Analysis of bioinformatics tools for LAMP primer and CRISPR guide RNA design.
• Summary of Cas-mediated trans-cleavage detection probe formats and readout methods (lateral flow, microfluidics, smartphones).

Main Results:

• Identification of challenges in LAMP-CRISPR assay development, such as increased oligonucleotide requirements and risk of false positives.
• Discussion of practical recommendations for optimizing sequence selection and assay standardization.
• Highlighting best practices for minimizing false-positive signals in LAMP-CRISPR assays.

Conclusions:

• LAMP-CRISPR assays present a promising yet challenging approach for decentralized and PoC diagnostics.
• Robust assay development requires careful consideration of sequence selection, oligonucleotide design, and readout strategies.
• Further research is needed to overcome current limitations and advance LAMP-CRISPR diagnostics for broader accessibility.