Exponential signal amplification through coupled rolling circle transcription and CRISPR/Cas13a cleavage for ultrasensitive molecular diagnostics.
Guo Y, Zhu Z, Zhu C, Shang B, Huang Y
Crispr
Faster, field-deployable disease detection means a pathogen threatening your tomatoes, fruit trees, or local elm population could be caught and contained weeks before visible symptoms appear.
Researchers built a new kind of diagnostic test that works like a molecular amplifier — it takes a tiny piece of genetic material, copies it rapidly, then uses CRISPR (a molecular scissors tool) to signal whether a target is present. The whole process happens in a single tube in under 10 minutes, without any complex lab equipment. This kind of speed and sensitivity could eventually be used to test crops and plants for viruses or bacteria right in the field.
Key Findings
SPRINT-C detects single molecules of nucleic acid in under 10 minutes using a one-pot isothermal reaction requiring no thermal cycling equipment
T7 RNA polymerase transcription rate (5.97 cycles/s) vastly outpaces LwCas13a cleavage rate (<0.019 s⁻¹), creating an exponential signal amplification cascade
Three enzymatic steps — padlock ligation, rolling circle transcription, and CRISPR/Cas13a cleavage — are seamlessly coupled in a single reaction vessel
chevron_right Technical Summary
Scientists developed a fast, ultra-sensitive test called SPRINT-C that can detect a single molecule of genetic material in just 10 minutes using a chain of three coupled enzymatic reactions, including CRISPR technology.
Abstract Preview
Rapid, sensitive nucleic acid detection is crucial for clinical diagnostics, food safety, and environmental monitoring. We present the Sensitive Padlock Rolling-circle INtegrated Transcription with...
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