| Field | Specification |
|---|---|
| Mfr No | |
| Assay Time | |
| Detection Method | |
| Product Type | |
| Sample Type(s) | Adipocytes and other fatty acid-transporting cells. Or compounds that affect fatty acid uptake activity |
| Shipping | |
| Species | |
| Storage |
Overview
For quantitative determination of long-chain fatty acid uptake in whole cells and evaluation of effects of ligands or drugs on fatty acid transport. The assay uses FL 488/523nm for signal readout. Compatible sample input includes Adipocytes and other fatty acid-transporting cells. Or compounds that affect fatty acid uptake activity. Typical stated assay timing is 2 hrs.
Key elements and design rationale
- Readout format: FL 488/523nm supports plate-based signal acquisition and consistent comparison across matched samples.
- Sample compatibility: The stated sample scope includes Adipocytes and other fatty acid-transporting cells. Or compounds that affect fatty acid uptake activity, which is useful when aligning matrix type with calibration and control design.
- Workflow timing: The listed assay time of 2 hrs helps frame batch planning, replicate handling, and plate throughput.
- Feature emphasis: Safe. Non-radioactive assay.
Additional feature notes highlight Fast and Sensitive. Homogenous “add-and-read” assay. No wash, lysis, or staining steps are needed; Simple and Convenient. Can be automated as a high-throughput assay for fatty acid transport and modulator screens in cells. Available format information for this listing includes 100 Tests.
Biological background
This product is centered on measurement of fatty acid uptake within the matrices described for the assay. In practice, datasets from this type of format are typically interpreted by comparing relative signal, activity, or abundance across matched control and experimental groups rather than relying on a single value in isolation. Careful alignment of sample matrix, incubation window, and calibration strategy is important when comparing results across plates, operators, or study days.
More details
LONG CHAIN FATTY ACIDS (LCFA) are important fuel sources for animals as substrates in β-oxidation and serve as building blocks for many different cellular structures. Long-chain unesterified fatty acids (LCFA) are transported into cells using membrane transport proteins, and increased LCFA levels in cells are common in diabetes, obesity-related diseases, cardiovascular disease, and certain forms of cancer. Therefore, fatty acid uptake is a significant therapeutic target for the treatment of metabolic disorders and an important topic for metabolic research.BioAssay Systems’ fluorescent cell-based fatty acid uptake assay uses a fluorescent fatty acid analog which is taken up by fatty acid transporter proteins and accumulates within the cell. Quench reagent is added to block extracellular fluorescent signals in the medium. The adherent cells import the fatty acid analog, and the bottom-read fluorimeter measures the increase in fluorescence signal at λex/em = 488/523nm. This high-throughput assay can be applied to assess fatty acid uptake activity in cells and to screen for activators and inhibitors.
Detection method
Fluorescent (FL 488/523 nm).
Procedures and timing
Stated procedure or timing information: 2 hrs.
Research relevance and current trends
- Plate-based quantification and side-by-side group comparison remain central use cases for this assay format.
- The product notes emphasize multi-sample throughput, making it relevant for screening-oriented and larger batch comparison studies.
- The description supports intervention-focused study designs in which researchers compare baseline and perturbed conditions.
Common research applications
- Quantify fatty acid uptake in adipocytes and other fatty acid-transporting by FL 488/523 nm readout.
- Compare treatment or phenotype groups using matched adipocytes and other fatty acid-transporting handling.
- Monitor time-course or pre/post changes in adipocytes and other fatty acid-transporting across study conditions.
Interpretation is usually strongest when signal changes are assessed alongside matrix-matched controls, replicate agreement, and the assay's stated analytical window.
Notes for experimental interpretation
- Matrix composition, background signal, and sample handling can influence apparent response; compare like-with-like whenever possible.
- Use appropriate blanks, controls, and replicate wells to distinguish biological differences from plate, reagent, or handling variability.
What cells are compatible with this kit?
This kit was developed with 3T3-L1 differentiated cells, and has not been tested with other cell lines. However, cell lines that are adherent and capable of fatty acid uptake can also be used with this kit. Suspension cells lines are not compatible with the kit. Please keep in mind that the recommended plating amount (5-8 x 104 cells/mL) will vary depending on the cell line.
I have read some papers where instead of plating differentiated 3T3-L1 cells the night before, the authors instead differentiate the cells in the well plates over two weeks. Can I use this method instead?
We have not tested this method, although it theoretically should work. You will have to normalize the amount of cells per well, however, since one well may have less differentiation than another and thus would have lower uptake which would be falsely attributed to the test compound.
I would like to run this assay in a 384-well plate instead of a 96-well plate to conserve cells. Can this assay be used in a 384 well plate?
We have not tested the assay in a 384 well plate, but it is likely that this is compatible. The recommended cell amounts should be divided by 4, so instead of 50,000-80,000 3T3-L1 cells per well you should use 12,500-20,000 cells per well. The reagents should be divided by 4 as well, so 0.25 µL of Substrate, 2 µL of Quench Reagent, and 25.25 µL of Assay Buffer, and add 25 uL of Working Reagent to the sample.
Can I use a 96 well plate which is not clear-bottom for this assay?
No. The assay functions by reading the increase in fluorescence from the imported substrate, but this is only visible from the bottom of the plate (where the cells are attached.)
I don?t have excitation filters of 485/515 nm. What can I set my fluorimeter to instead?
The Excitation filter may be anywhere from 470 to 500 nm, and the Emission filter may be set anywhere from 500 to 560 nm. Please keep in mind that setting the filters outside 485/515 nm will result in lower fluorescence intensity.
I want to run my samples over several days. Is it all right if my reagents undergo several freeze thaw cycles?
The assay buffer will be fine. The Quench Reagent and Substrate are more sensitive, so it is recommended to aliquot them into several microcentrifuge tubes to prevent multiple freeze-thaw cycles, and covering the tubes in aluminum foil.
I am running differentiated 3T3-L1 adipocytes with insulin and am receiving different results than those shown on the protocol sheet. Why don?t my results match?
Since 3T3-L1 adipocytes need to be differentiated in order to express the fatty acid uptake proteins, you may have different levels of differentiation than the cells used for our protocol sheet graph. The graph is only meant as an example of how the kit works and how the kit can be used to track changes in fatty acid uptake.
For laboratories requiring additional technical capacity, we provide scientific support services including assay execution, method guidance, product sourcing, and customization to align the assay with specific experimental objectives. If you need assistance selecting the appropriate kit configuration, adapting the workflow to your application, or identifying related research services, please click Talk to a Scientist, email support@biohippo.com, or review our Research Services; a member of our scientific team will follow up with recommendations tailored to your study.
