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EK000068-EK0363: Rat GDNF ELISA Kit
Range 31.2pg/ml-2000pg/ml
Sensitivity < 4pg/ml
Specificity: no detectable cross-reactivity with any other cytokine.
Application: for quantitative detection of rat GDNF in sera, plasma, body fluids, tissue lysates or cell culture supernates.
Expiration: four months at 4°C and eight months at -20°C.
Background
Glial cell line-derived neurotrophic factor (GDNF) is a glycosylated, disulfide-bonded homodimer that is a distantly related member of the transforming growth factor-beta superfamily.1 GDNF, is a potent neurotrophic factor that promotes the survival of dopaminergic neurones in cultures including embryonic neuronal cultures.2 GDNF, in addition to its potential role in the differentiation and survival of central nervous system neurons, has profound effects on kidney organogenesis and the development of the peripheral nervous system.3 GDNF may have utility in the treatment of Parkinson's disease, which is marked by progressive degeneration of midbrain dopaminergic neurons.1 GDNF lies on the short arm of human chromosome 5, at 5p13.1-p13.3 ability to promote dopamine uptake in midbrain cultures.2 The standard product used in this kit is recombinant rat GDNF, which is a dimmer composed of two chains with 134 amino acids.
Principle
The ELISA Kit is based on standard sandwich enzyme-linked immune-sorbent assay technology. The target specific antibodies are precoated onto 96-well plates. The target from the sample is bound to the microwell. The biotinylated target specific detection antibodies are added to the microwells and followed by washing with the PBS or TBS buffer. Avidin-Biotin-Peroxidase Complex is added and unbound conjugates are washed away with the PBS or TBS buffer. TMB, the HRP (horseradish peroxidase) substrate, is used to visualize color change resulting from the HRP enzymatic reaction. TMB is catalyzed by HRP to produce the blue color. The color changes into yellow after the acidic stop solution is added. The density of the yellow color is proportional to the target amount from the sample captured in the microwells.
Reference
1. Lin, L.-F. H.; Doherty, D. H.; Lile, J. D.; Bektesh, S.; Collins, F. GDNF: a glial cell line-derived neurotrophic factor for midbrain dopaminergic neurons. Science 260: 1130-1132, 1993.
2. Bermingham, N.; Hillermann, R.; Gilmour, F.; Martin, J. E.; Fisher, E. M. Human glial cell line-derived neurotrophic factor (GDNF) maps to chromosome 5. Hum. Genet. 96: 671-673, 1995.
3. Durbec, P.; Marcos-Gutierrez, C. V.; Kilkenny, C.; Grigoriou, M.; Wartiowaara, K.; Suvanto, P.; Smith, D.; Ponder, B.; Costantini, F.; Saarma, M.; Sariola, H.; Pachnis, V. GDNF signalling through the Ret receptor tyrosine kinase. Nature 381: 789-793, 1996.
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