CyQUANT™ LDH Cytotoxicity Assays
Invitrogen™

CyQUANT™ LDH Cytotoxicity Assays

CyQUANT cytotoxicity assays measure cellular toxicity based on the release of cytosolic enzymes (LDH or G6PD) from damaged cells. These cytotoxicity assays utilize either colorimetric or fluorescence detection and allow continuous monitoring of cell death using microplate readers.
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카탈로그 번호수량검출 방법
C203031000 AssaysFluorescence
C20300200 AssaysAbsorbance
C20302200 AssaysFluorescence
C203011000 AssaysAbsorbance
카탈로그 번호 C20303
제품 가격(KRW)
886,000
Online offer
Ends: 31-Mar-2026
1,042,000
할인액 156,000 (15%)
Each
수량:
1000 Assays
검출 방법:
Fluorescence
제품 가격(KRW)
886,000
Online offer
Ends: 31-Mar-2026
1,042,000
할인액 156,000 (15%)
Each

CyQUANT cytotoxicity assays provide a simple and reliable method to assess chemical or cell-mediated cellular toxicity. The CyQUANT LDH Cytotoxicity Assays and the CyQUANT Cytotoxicity Assay (G6PD Release Assay) use colorimetric- or fluorescence-based detection to measure the release of cytosolic enzymes (LDH or G6PD) from damaged cells. These cytotoxicity assays are optimized for use on microplate readers and can be used for continuous monitoring of cell health over time since cell lysis is not required, making them versatile tools for high-throughput screening and drug discovery applications.

CyQUANT LDH Cytotoxicity Assays are used to measure cytotoxicity through the release of lactate dehydrogenase (LDH), a proven indicator of cellular toxicity. LDH is a cytosolic enzyme found in many cells that is released into the surrounding cell culture medium when the plasma membrane is damaged due to cellular injury, tissue damage, or disease. CyQUANT LDH Assays enable accurate and quantitative measurement of this extracellular LDH release using either colorimetric or fluorescence detection on microplate readers. These LDH assay kits can be used with different cell types, including 3D cell models. Since LDH released into the medium is the indicator of cytotoxicity, these assays can monitor cellular toxicity from the same sample over time.

In the colorimetric CyQUANT LDH Assay (Cat. Nos. C20300 and C20301), extracellular LDH release is quantified by a coupled enzymatic reaction in which LDH catalyzes the conversion of lactate to pyruvate via NAD+ reduction to NADH. Diaphorase then uses NADH to reduce a tetrazolium salt (INT) to a red formazan product that can be measured at 490 nm.

In the fluorescence CyQUANT LDH Assay (Cat. Nos. C20302 and C20303), extracellular LDH release is quantified by a coupled enzymatic reaction in which LDH catalyzes the conversion of lactate to pyruvate via NAD+ reduction to NADH. Diaphorase then uses NADH to reduce resazurin to resorufin that can be detected using an ex/em of 560/590 nm using a fluorescence microplate reader.

Features of the CyQUANT LDH Cytotoxicity Assay

  • Convenient—add-mix-read format for adherent and suspension cells, including 3D cell models
  • Accurate—provides a quantitative measurement of LDH release
  • Flexible—ideal for high-throughput screening, monitor cytotoxicity from the same sample over time
  • Robust—uses stable LDH enzyme activity as a cytotoxic marker
For Research Use Only. Not for use in diagnostic procedures.
사양
세포 투과성Cell-impermeant
설명CyQUANT™ LDH Cytotoxicity Assay, fluorescence
검출 방법Fluorescence
염료 유형Other Label(s) or Dye(s), Resorufin
형식96-well plate
수량1000 Assays
배송 조건Dry Ice
색상Red
Emission590 nm
Excitation Wavelength Range560 nm
용도(애플리케이션)LDH Cytotoxicity Assay
용도 (장비)Microplate Reader
제품라인CyQUANT
제품 유형LDH Cytotoxicity Assay
Unit SizeEach
구성 및 보관
• 5 vials Reagent Mix
• 5 x 12 mL Reporter Mix
• 1 x 12 mL Lysis Buffer
• 1 x 60 mL Stop Solution
• 1 x 30 μL LDH Positive Control

Store at -20°C, protect from light.

자주 묻는 질문(FAQ)

How many assays can I perform using the CyQUANT LDH Cytotoxicity Assay - Fluorescence Kit (Cat. No. C20303)?

The CyQUANT LDH Cytotoxicity Assay - Fluorescence Kit (Cat. No. C20303) contains sufficient reagents to perform 1,000 assays in 96-well plates.

Find additional tips, troubleshooting help, and resources within our Cell Analysis Support Center.

In the CyQUANT LDH Cytotoxicity Fluorescence assay, my treatment resulted in an LDH release signal that was lower than the Spontaneous LDH Release Control signal. What could cause this?

Here are potential causes:
- Fluorescence may be quenched and/or LDH activity may be inhibited by various chemical compounds.
- The LDH may be precipitated/denatured.
- LDH can also be digested by any proteases liberated in the extracellular medium, examine the samples for protease activity.

Find additional tips, troubleshooting help, and resources within our Cell Analysis Support Center.

I did not have a Spontaneous LDH Release Control in the CyQUANT LDH Cytotoxicity Fluorescence assay? Is this critical?

Yes. The Spontaneous LDH Release Control provides the lower limit of natural LDH release for untreated samples (healthy cells). Without this control, you cannot determine whether any treatment resulted in any change in release, which relates to levels of cytotoxicity.

Find additional tips, troubleshooting help, and resources within our Cell Analysis Support Center.

Can I refrigerate or freeze the collected cell culture media for analysis later using the CyQUANT LDH Cytotoxicity Assay - Fluorescence Kit?

We do not recommend doing this. LDH is an enzyme that will lose activity in diluted form when stored over time, refrigeration would not limit this loss of activity and freezing would cause a greater loss of activity.

Find additional tips, troubleshooting help, and resources within our Cell Analysis Support Center.