Analysis Biomolecular Interactions of Aptamers (D-T4 and L-T4) with BPA-HRP by BLI (CAT#: STEM-MB-0114-CJ)

Introduction

Many polycarbonate plastics contain bisphenol A (BPA), which is one of the most widely produced chemicals in the world. It is used in hard plastics, food cans, drink cans, receipts, and dental sealants. BPA is a small carcinogenic molecule (MW = 228 Da) linked to breast and prostate cancer. BPA is regarded as an endocrine disruptor because it can mimic the action of hormone estrogen and disturb the estrogen–estrogen receptor binding process (hormonal pathways). And L-DNAzyme- and L-DNA-templated nanoparticles or tetrahedron nanostructures were used for metal ion sensing and molecular imaging and as anticancer drug delivery vehicles. And L-form aptamer (L-T4) was synthesized based on D-T4 aptamer

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Principle Applications Procedure Materials Notes Related Products

Principle

Bio-Layer Interferometry (BLI) is an optical technique for measuring macromolecular interactions by analyzing interference patterns of white light reflected from the surface of a biosensor tip. BLI experiments are used to determine the kinetics and affinity of molecular interactions. In a BLI experiment, one molecule is immobilized to a Dip and Read Biosensor and binding to a second molecule is measured. A change in the number of molecules bound to the end of the biosensor tip causes a shift in the interference pattern that is measured in real-time.

Applications

Oncology & Cancer; Immunology/Inflammation; Pharmacology

Procedure

1. Detect Buffers and prepare samples. BLI experiments are set up with one molecule immobilised on the surface of the biosensor (load sample) and a second molecule in solution (the analytical sample).
2. Fix the load sample on the biocompatible biosensor while the analytical sample is in solution.
3. The biosensor tip is immersed in the solution so that the target molecule begins to bind to the analysis sample.
4. Set up and run the BLI experiment. Molecules bound to or dissociated from the biosensor can generate response curves on the BLI system; unbound molecules, changes in the refractive index of the surrounding medium or changes in flow rate do not affect the interferogram pattern.
5. Collect and analyse data on the BLI's system.

Materials

• Equipment: Fortebio Bio-Layer Interferometry (BLI)
• Sample Type: DNA, RNA, Protein, Antibodies, Peptides, Small Molecules
• Optionals: BPA, DMSO, Anti-BPA Antibody, Triple Deionized Distilled Water

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