Measured by its ability to neutralize the effect of CNTF on dorsal root ganglion neurons from E10 chick embryos. Davies, A. M. (1989) in Neurotrophic Factor Bioassay Using Dissociated Neurons, Nerve Growth Factor. Rush, R. A. (eds): John Willey and Sons, Ltd. 95. The Neutralization Dose (ND50) is typically 15-30 µg/mL in the presence of 10 ng/mL Recombinant Human CNTF.
Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.
Neuron Survival in Response to CNTF and Neutralization by Human CNTF Antibody. Recombinant Human CNTF (Catalog # 257-NT) supports the survival of dorsal root ganglion neurons from E10 chick embryos in a dose-dependent manner (orange line), as measured by MTT staining. Neuron survival elicited by Recombinant Human CNTF (10 ng/mL) is neutralized (green line) by increasing concentrations of Goat Anti-Human CNTF Polyclonal Antibody (Catalog # AB-257-NA). The ND50 is typically 15‑30 µg/mL.
Preparation and Storage
Reconstitute at 1 mg/mL in sterile PBS.
The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage
Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
12 months from date of receipt, -20 to -70 °C as supplied.
1 month, 2 to 8 °C under sterile conditions after reconstitution.
6 months, -20 to -70 °C under sterile conditions after reconstitution.
Ciliary neurotrophic factor (CNTF) is structurally related to IL-6, IL-11, LIF, CLC, and OSM. CNTF was initially identified as a trophic factor for embryonic chick ciliary parasympathetic neurons in culture. Subsequent studies have demonstrated that CNTF is a survival factor for additional neuronal cell types, including dorsal root ganglion sensory neurons, sympathetic ganglion neurons, embryonic motor neurons, major pelvic ganglion neurons and hippocampal neurons.
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