Ciliary Neurotrophic Factor human
SIGMA/C3710 - CNTF, recombinant, expressed in E. coli, lyophilized powder, suitable for cell culture
Synonym: CNTF
MDL Number: MFCD00676720
Product Type: Chemical
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| assay | ≥95% (SDS-PAGE) |
| biological source | human |
| form | lyophilized powder |
| impurities | ≤10 EU/μg |
| mol wt | 22.8 kDa |
| packaging | pkg of 10 and 20 μg |
| potency | ≤325 ng/mL ED50 ((≥ 3.1 x 103 units/mg)) |
| quality | endotoxin tested |
| Quality Level | 200  |
| recombinant | expressed in E. coli |
| storage condition | avoid repeated freeze/thaw cycles |
| storage temp. | −20°C |
| technique(s) | cell culture | mammalian: suitable |
| UniProt accession no. | P26441  |
| Analysis Note: | The proliferative activity is tested in a cell proliferation assay using the cytokine-dependent human erythroleukemic cell line, TF-1. |
| Application: | Ciliary Neurotrophic Factor human has been used to study its effect on photoreceptor neuroprotection and Muller glial cell proliferation in zebrafish retina. It has also been used to study the effects of intravitreal injection of ciliary neurotrophic factor (CNTF) on photoreceptor injury and BRB (blood-retinal barrier) breakdown in transgenic model. |
| Biochem/physiol Actions: | Ciliary neurotrophic factor (CNTF) was first identified as a survival factor for neurons from the ciliary ganglion of chicken embryos. Most of its known actions are restricted to cells of the nervous system, including motor neurons, sympathetic ganglion neurons, sensory neurons, hippocampal neurons, and medial septal neurons. CNTF also prevents degeneration of motor axons after axotomy and promotes astrocyte differentiation and oligodendrocyte survival and maturation. Outside the nervous system, CNTF maintains embryonic stem cells in an undifferentiated, pluripotent state. CNTF is structurally related to leukemia inhibitory factor (LIF), interleukin-6 (IL-6), interleukin-11 (IL-11) and oncostatin M (OSM). CNTF exerts its actions through the activation of the high-affinity CTNF receptor complex, which contains the ligand-binding α-subunit (CNTF Rα) and two signal transducing β-subunits (LIF Rβ and gp130). The LIF Rβ subunit is also shared by receptors for LIF and OSM. The gp130 subunit is also shared by receptors for LIF, OSM, IL-6, and IL-11. CNTF is localized in the cell nucleus subsequent to receptor binding. Human and rat CNTF share ~83% sequence homology and show cross-reactivity in bioactivity. |
| Biochem/physiol Actions: | Ciliary neurotrophic factor was first identified as a survival factor for neurons from the ciliary ganglion of chicken embryos. Most of its known actions are restricted to cells of the nervous system, including motor neurons, sympathetic ganglion neurons, sensory neurons, hippocampal neurons and medial septal neurons. CNTF also prevents degeneration of motor axons after axotomy and promotes astrocyte differentiation and oligodendrocyte survival and maturation. |
| General description: | The CNTF (ciliary neurotrophic factor) gene encodes a cytokine, and is mapped to human chromosome 11q12.1. |
| Physical form: | Lyophilized from a sterile (0.2 micron) filtered aqueous solution containing 10 mM sodium phosphate, pH 7.5 |
| RIDADR | NONH for all modes of transport |
| WGK Germany | WGK 3 |
| Flash Point(F) | Not applicable |
| Flash Point(C) | Not applicable |
| Purity | ≥95% (SDS-PAGE) |
| Storage Temp. | −20°C |
| UNSPSC | 12352202 |