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HTRF Human Total HER2 Detection Kit, 500 Assay Points
HTRF Human Total HER2 Detection Kit, 500 Assay Points
Shipping box for Revvity reagent kits
The total HER2 kit monitors the cellular receptor expression level and can be used as a normalization assay for the phospho-HER2 kit.
For research use only. Not for use in diagnostic procedures. All products to be used in accordance with applicable laws and regulations including without limitation, consumption and disposal requirements under European REACH regulations (EC 1907/2006).
| Feature | Specification |
|---|---|
| Application | Cell Signaling |
| Sample Volume | 16 µL |
The total HER2 kit monitors the cellular receptor expression level and can be used as a normalization assay for the phospho-HER2 kit.
For research use only. Not for use in diagnostic procedures. All products to be used in accordance with applicable laws and regulations including without limitation, consumption and disposal requirements under European REACH regulations (EC 1907/2006).
Product Variants
Unit Size: 500 Assay Points
Part #:
64NR2PEG
List Price
USD 2,147.00
Unit Size: 10,000 Assay Points
Part #:
64NR2PEH
List Price
USD 12,490.00
HTRF Human Total HER2 Detection Kit, 500 Assay Points
Shipping box for Revvity reagent kits
HTRF Human Total HER2 Detection Kit, 500 Assay Points
Product information
Overview
The Total HER2 cellular assay kit monitors HER2 and is used as a normalization assay with the phospho-HER2 kit. Upregulation of HER2, or human epidermoid receptor 2, also known as ErbB2 receptor, is associated with human breast cancer and several others, such as ovarian, stomach, bladder, salivary, or lung carcinomas, making HER2 a key target for anti-cancer therapies.
Specifications
| Application |
Cell Signaling
|
|---|---|
| Brand |
HTRF
|
| Detection Modality |
HTRF
|
| Lysis Buffer Compatibility |
Lysis Buffer 3
Lysis Buffer 4
Lysis Buffer 5
|
| Molecular Modification |
Total
|
| Product Group |
Kit
|
| Sample Volume |
16 µL
|
| Shipping Conditions |
Shipped in Dry Ice
|
| Target Class |
Phosphoproteins
|
| Target Species |
Human
|
| Technology |
TR-FRET
|
| Therapeutic Area |
Oncology & Inflammation
|
| Unit Size |
500 Assay Points
|
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HTRF Human Total HER2 Detection Kit, 500 Assay Points
HTRF Human Total HER2 Detection Kit, 500 Assay Points
How it works
Total-HER2 assay principle
The Total-HER2 assay quantifies the expression level of HER2 in a cell lysate. Contrary to Western Blot, the assay is entirely plate-based and does not require gels, electrophoresis or transfer. The Total-HER2 assay uses two labeled antibodies: one coupled to a donor fluorophore, the other to an acceptor. Both antibodies are highly specific for a distinct epitope on the protein. In presence of HER2 in a cell extract, the addition of these conjugates brings the donor fluorophore into close proximity with the acceptor and thereby generates a FRET signal. Its intensity is directly proportional to the concentration of the protein present in the sample, and provides a means of assessing the proteins expression under a no-wash assay format.
Total-HER2 2-plate assay protocol
The 2 plate protocol involves culturing cells in a 96-well plate before lysis then transferring lysates to a 384-well low volume detection plate before adding Total HER2 HTRF detection reagents. This protocol enables the cells' viability and confluence to be monitored.
Total-HER2 1-plate assay protocol
Detection of total HER2 with HTRF reagents can be performed in a single plate used for culturing, stimulation and lysis. No washing steps are required. This HTS designed protocol enables miniaturization while maintaining robust HTRF quality.
Assay validation
HTRF Total HER2 assay compared to Western Blot
Human SKOV3 cells were grown in a T175 flask at 37°C until 80% confluency. Cells were then stimulated with 100 nM EGF for 10min. After medium removal, the cells were lysed with 3mL of supplemented lysis buffer for 30 min at room temperature. Soluble supernatants were collected after a 10 minute centrifugation. Serial dilutions of the cell lysate were performed in the supplemented lysis buffer and 16 µL of each dilution were dispensed and analyzed side-by-side by Western-blot and by HTRF. By using HTRF total-HER2, only 3000 cells are sufficient for minimal signal detection while 12,500 cells are needed for a Western Blot signal. The HTRF assay is at least 4-fold more sensitive than the Western Blot.
Validation of the HTRF total-HER2 assay on human cancer cell lines
Human (SKOV3, BT474, A431 and MCF7) cells were grown in a T175 flask at 37 °C, 5% CO2 for 2 days. After removal of cell culture medium, 3 mL of supplemented lysis buffer 3 were added and incubated for 45 min. Soluble supernatants were collected after 10 min centrifuging. HER2 was detected using 16µL of cell lysate. Cell lines from other species have not been tested, hence they must be evaluated case by case.the Western Blot. Differences obtained for S/N are well correlated with the number of HER2 receptors present in the different cell lines (Gabott et all., JBC 2011)
Total HER2 assay used to control the phosphorylation status of HER2
SKOV3 cells (100,000 cells/well) were activated with EGF for 10 min, using the two-plate assay protocol of the HTRF phospho- and total-HER2 cellular assays. As expected, results obtained show a dose-response increase of HER2 phosphorylation upon EGF stimulation while HER2 expression level remains constant.
Simplified pathway
HER2 epidermal growth factor signaling
HER2 is a receptor tyrosine kinase and belongs to the ErbB family of epidermal growth factor receptors. HER2 is present on the cell surface and is the only EGFR family member for which no ligand has been found yet. HER2 receptor activation induces auto-phosphorylation of HER2 on Tyr1221/1222. This provides docking sites for a variety of adaptor proteins, kinases & phosphatases. that induce downstream activation of several signal transduction cascades, principally the MAPK/ERK/JNK and PI3K/AKT pathways. The signal transduction from the HER2/ErbB receptor regulates various biological processes such as cell proliferation, differentiation, survival, adhesion, migration & angiogenesis. Hyperactivity of HER2 is associated with cancer which make HER2 a key target for anti-cancer therapies.
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