Why does null hypothesis testing matter for DLS-based VLP aggregation?

Null hypothesis testing in DLS aggregation studies enables objective assessment of whether observed particle size changes are statistically significant, supporting robust target validation and reducing false positives in capsid stability claims.

How does independent variable isolation fit in heat-induced aggregation tracking?

Isolating temperature as the independent variable allows teams to directly attribute aggregation kinetics to thermal stress, clarifying mechanistic drivers and supporting reproducible discovery-stage experiments.

What do quantitative DLS measurements of particle size enable?

Quantitative DLS outputs provide real-time, reproducible data on aggregation onset and progression, enabling comparative analysis of VLP stability across formulations and conditions.

Why are replication requirements critical for cross-functional DLS studies?

Replication ensures that aggregation measurements are robust and reproducible, facilitating reliable data sharing and decision-making across discovery, formulation, and analytical teams.

Which statistical analysis capabilities are required before DLS implementation?

Teams must be able to analyze DLS-derived size distributions, assess aggregation thresholds, and apply statistical tests to validate observed changes before integrating DLS data into R&D workflows.

Tracking Aggregation of Virus-Like Particles Using Dynamic Light Scattering

JoVE Encyclopedia of Experiments

Микробиология

0 просмотров • 2:14 мин • July 31st, 2026

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Start with a cuvette containing a purified, monodisperse suspension of virus-like particles in a buffer.

These particles contain the capsid, the protein shell of a virus, but they lack genetic material, making them non-infectious.

Place the cuvette in a dynamic light scattering (DLS) instrument that has been preheated to a target temperature.

Allow the sample to equilibrate briefly, then begin the measurements.

Heating causes the capsid proteins to denature. This structural change exposes hydrophobic regions that promote particle clustering and aggregation.

DLS directs a laser beam through the suspension and measures fluctuations in the scattered light caused by particle motion.

Smaller particles move faster and produce rapid fluctuations in the scattered light, while larger aggregates move more slowly and cause slower fluctuations.

DLS analyzes these fluctuations at regular intervals to track the particle aggregation in real time.

Create a new size standard operating procedure in the DLS instrument software as detailed in the text protocol. Select the run arrow within the software to open and name a new sample and allow the instrument to reach the temperature equilibrium.

Transfer the VLP suspension to a small volume quartz cuvette, avoid bubbles, and pipette slowly against the wall of the cuvette. After the instrument has reached temperature equilibrium, insert the cuvette into the sample chamber. After waiting 10 seconds for the sample temperature to equilibrate, start the run and simultaneously start a timer.

Stop the timer at the end of the first measurement. Take this time as the first time point. Obtain subsequent time points from the measurement times recorded by the software.