Product namePyruvate dehydrogenase (PDH) Enzyme Activity Dipstick Assay Kit
See all Pyruvate dehydrogenase kits
Sample typeCell culture extracts, Tissue
Assay typeSandwich (quantitative)
Species reactivityReacts with: Mouse, Rat, Cow, Human, Pig
ab109882 is used to quantify the activity of the PDH enzyme complex from human, bovine, mouse, rat and pig samples. This is accomplished by immunocapturing PDH with an anti-PDH antibody immobilized on a defined section of a dipstick. The enzyme complex is immunocaptured in its native form and activity is measured by the reaction scheme. PDH activity is visualized by coupling PDH-dependent production of NADH to the reduction of NBT in the presence of excess diaphorase, forming an insoluble intensely colored precipitate at the capture line. The signal intensity is measured by a dipstick reader or analyzed by other imaging systems such as a flatbed scanner.
Purified mitochondria can be used in this assay. However, homogenized tissue and whole cells can also be used without the need for mitochondrial isolation.
Pyruvate dehydrogenase activity is regulated by PDH kinase and PDH phosphatase. Cells grown in glucose media derive most of their energy from glycolysis; therefore, most of their PDH complex may be in an inactive phosphorylated form at the time of isolation. Growing cells in alternate carbon sources such as glutamine/galactose may up-regulate PDH activity. This kit does not include PDH kinases, PDH phosphatases or their respective inhibitors. These may be incorporated into the assay at the user’s discretion.
Store dipsticks at room temperature out of direct sunlight in their provided desiccant container. Avoid high humidity conditions.
Store Sample buffer at 4°C.
Store 20X Reagent Mix, Detergent, and Diaphorase at -80°C, but these may be aliquoted upon receipt to prevent freeze/thaw cycles.
Store Blocking solution at -20°C.
Store NBT in the dark at -80°C.
Tested applicationsSuitable for: Functional Studiesmore details
Storage instructionsPlease refer to protocols.
Components 90 tests 30 tests 20X Reagent Mix 3 x 600µl 1 x 600µl 96-well microplate 6 units 2 units Blocking solution 3 x 2ml 1 x 2ml Detergent 3 x 1ml 1 x 1ml Diaphorase 3 x 400µl 1 x 400µl Dipsticks 1 x 90 units 1 x 30 tests NBT 3 x 40µl 1 x 40µl Sample buffer 3 x 30ml 1 x 30ml
Our Abpromise guarantee covers the use of ab109882 in the following tested applications.
|Functional Studies||Use at an assay dependent dilution.|
Figure 2. An example using the ab109882 to measure PDH activity in human fibroblast sample. Based on the standard curve, 160 µg of protein extract were loaded onto a dipstick for each sample. The figure shows two developed dipsticks, a control sample and a sample from a patient with a mutation in the E1-alpha subunit of PDH. The analysis of the signal intensity and interpolation from the standard curve showed that the patient sample had 8% the PDH activity of the control.
Figure 1. An example using the ab109882 to measure PDH activity in human fibroblast sample. Developed dipsticks from a 1:2 dilution series using a positive control sample and the associated standard curve. Starting material was 160 µg of fibroblast protein extract in a 100 µL reaction volume (50 µL sample in Sample buffer plus 50 µL of Blocking solution). The dipsticks were developed for 1 hour in Activity buffer.
Abcam's enzyme activity assays apply a novel approach, whereby target enzymes are first immunocaptured from tissue or cell samples before subsequent functional analysis. Dipstick ELISA Kits extend this concept by utilizing the well-established lateral flow concept, wherein capture antibodies are striped onto nitrocellulose membrane and a wicking pad draws the sample through the antibody bands. All of our ELISA kits utilize highly validated monoclonal antibodies and proprietary buffers, which are able to capture even very large enzyme complexes in their fully-intact, functionally-active states.
This product has been referenced in:
- Batran RA et al. The antianginal ranolazine mitigates obesity-induced nonalcoholic fatty liver disease and increases hepatic pyruvate dehydrogenase activity. JCI Insight 4:N/A (2019). Read more (PubMed: 30626749) »
- Tong WH et al. TLR-activated repression of Fe-S cluster biogenesis drives a metabolic shift and alters histone and tubulin acetylation. Blood Adv 2:1146-1156 (2018). Read more (PubMed: 29784770) »