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Updated: Apr 21, 2026
Author Spotlight: Engineering Molecular Tools for Disease Detection and Imaging
Published on: December 8, 2023
Synthesizing AND gate genetic circuits based on CRISPR-Cas9 for identification of bladder cancer cells
Yuchen Liu1, Yayue Zeng1, Li Liu1
1Key Laboratory of Medical Reprogramming Technology, Shenzhen Second People's Hospital, First Affiliated Hospital of Shenzhen University, Shenzhen 518039, China.
Abstract:
The conventional strategy for cancer gene therapy offers limited control of specificity and efficacy. A possible way to overcome these limitations is to construct logic circuits. Here we present modular AND gate circuits based on CRISPR-Cas9 system. The circuits integrate cellular information from two promoters as inputs and activate the output gene only when both inputs are active in the tested cell lines. Using the luciferase reporter as the output gene, we show that the circuit specifically detects bladder cancer cells and significantly enhances luciferase expression in comparison to the human telomerase reverse transcriptase-renilla luciferase construct. We also test the modularity of the design by replacing the output with other cellular functional genes including hBAX, p21 and E-cadherin. The circuits effectively inhibit bladder cancer cell growth, induce apoptosis and decrease cell motility by regulating the corresponding gene. This approach provides a synthetic biology platform for targeting and controlling bladder cancer cells in vitro.
Insights
Researchers developed CRISPR-Cas9 AND gate circuits for precise cancer gene therapy. These synthetic biology circuits specifically target bladder cancer cells, enhancing therapeutic gene expression and controlling cancer cell growth, apoptosis, and motility in vitro.
Area of Science:
- Synthetic Biology
- CRISPR-Cas9 Gene Editing
- Cancer Gene Therapy
Background:
- Conventional cancer gene therapy lacks specificity and efficacy.
- Logic circuits offer a potential solution for enhanced control.
- CRISPR-Cas9 systems can be engineered into biological logic gates.
Purpose of the Study:
- To design and validate modular AND gate circuits using CRISPR-Cas9.
- To achieve specific detection and targeted gene activation in cancer cells.
- To demonstrate the therapeutic potential of these circuits in bladder cancer.
Main Methods:
- Construction of modular AND gate circuits integrating two promoter inputs.
- Utilized CRISPR-Cas9 system for circuit implementation.
- Tested circuit specificity and function using luciferase reporter and therapeutic genes (hBAX, p21, E-cadherin) in bladder cancer cell lines.
Main Results:
- The AND gate circuits specifically detected bladder cancer cells.
- Significantly enhanced reporter gene expression compared to standard constructs.
- Therapeutic gene regulation effectively inhibited cancer cell growth, induced apoptosis, and reduced motility.
Conclusions:
- CRISPR-Cas9 based AND gate circuits provide a modular synthetic biology platform.
- This approach offers precise targeting and control of bladder cancer cells in vitro.
- Demonstrates a novel strategy for improving cancer gene therapy specificity and efficacy.
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