Cell Signaling Technology

Product Pathways - PathScan ELISA

PathScan® Total Ret Sandwich ELISA Kit #7032

When ordering five or more kits, please contact us for processing time and pricing at sales@cellsignal.com.

Kit Includes Volume Solution Color
Ret Rabbit mAb Coated Microwells 96 tests
Ret Mouse Detection mAb 11 ml Green
Anti-mouse IgG, HRP-linked Antibody 11 ml Red
TMB Substrate #7004 11 ml Colorless
STOP Solution #7002 11 ml Colorless
ELISA Wash Buffer (20X) 25 ml Colorless
Sample Diluent 25 ml Blue
Cell Lysis Buffer (10X) #9803 15 ml Yellowish

Note: 12 8-well modules –Each module is designed to break apart for 8 tests.
Note: Kit should be stored at 4°C with the exception of Cell Lysis Buffer, which is stored at –20°C (packaged separately).

Species Cross-Reactivity

H

Reactivity Key:  H=Human
Species enclosed in parentheses are predicted to react based on 100% sequence homology.

Description

The PathScan® Total Ret Sandwich ELISA Kit is a solid phase sandwich enzyme-linked immunosorbent assay (ELISA) that detects endogenous levels of total Ret protein. A Ret rabbit mAb has been coated on the microwells. After incubation with cell lysates, Ret protein (phospho and nonphospho) is captured by the coated antibody. Following extensive washing, a Ret mouse mAb is added to detect captured Ret protein. Anti-mouse IgG, HRP-linked antibody is then used to recognize the bound detection antibody. HRP substrate TMB is added to develop color. The magnitude of the absorbance for this developed color is proportional to the quantity of total Ret protein.

Specificity / Sensitivity

PathScan® Total Ret Sandwich ELISA Kit #7032 detects endogenous levels of total Ret protein in human cells, as shown in Figure 1. The kit sensitivity is shown in Figure 2. This kit detects proteins from the indicated species, as determined through in-house testing, but may also detect homologous proteins from other species.

ELISA - Western correlation

ELISA - Western correlation

Figure 1: Constitutive phosphorylation of Ret in TT cells lysed in the presence of phosphatase inhibitors* (phospho lysate) is detected by PathScan® Phospho-Ret (panTyr) Sandwich ELISA Kit #7034 (upper, right). In contrast, a low level of phospho-Ret protein is detected in TT cells lysed in the absence of phosphatase inhibitors* (nonphospho lysate). Similar levels of total Ret protein from both nonphospho or phospho lysates are detected by PathScan® Total Ret Sandwich ELISA Kit #7032 (upper, left). Absorbance at 450 nm is shown in the top figure while corresponding western blots using a Phospho-Ret (Tyr905) Rabbit Antibody #3221 (right) or a total Ret (C31B4) Rabbit mAb #3223 (left) are shown in the bottom figure. *Phosphatase inhibitors include sodium pyrophosphate, β-glycerophosphate and Na3VO4.

Sensitivity

Sensitivity

Figure 2: The relationship between protein concentration of phospho or nonphospho lysates and the absorbance at 450 nm is shown. TT cells were cultured (85% confluence) and lysed with or without the addition of phosphatase inhibitor to the lysis buffer (phospho or nonphospho lysate).

Background

The Ret proto-oncogene (c-Ret) is a receptor tyrosine kinase that functions as a multicompetent receptor complex in conjunction with other membrane-bound, ligand-binding GDNF family receptors (1). Ligands that bind the Ret receptor include the glial cell line-derived neurotropic factor (GDNF) and its congeners neurturin, persephin, and artemin (2-4). Research studies have shown that alterations in the corresponding RET gene are associated with diseases including papillary thyroid carcinoma, multiple endocrine neoplasia (type 2A and 2B), familial medullary thyroid carcinoma, and a congenital developmental disorder known as Hirschsprung’s disease (1,3). The Tyr905 residue located in the Ret kinase domain plays a crucial role in Ret catalytic and biological activity. Substitution of Phe for Tyr at position 905 dramatically inhibits Ret autophosphorylation activity (5).

  1. Airaksinen, M.S. et al. (1999) Mol. Cell. Neurosci. 13, 313-325.
  2. Takahashi, M. et al. (1989) Oncogene 4, 805-806.
  3. Manie, S. et al. (2001) Trends Genet. 17, 580-589.
  4. Tallini, G. and Asa, S. (2001) Adv. Anat. Pathol. 8, 345-354.
  5. Iwashita, T. et al. (1999) Oncogene 18, 3919-3922.

Application References

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Companion Products

Rabbit monoclonal antibody is produced under license (granting certain rights including those under U. S. Patent No. 5,675,063) from Epitomics, Inc.

For Research Use Only. Not For Use In Diagnostic Procedures.

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