Partial purification of a low-molecular-weight growth factor from chicken brain.
The regenerating amphibian limb serves as a useful model for studying factors influencing cell proliferation and differentiation. In particular, peripheral nerves are thought to provide a stimulus for growth of the blastema, presumably via the elaboration of an as yet unidentified neurotrophic factor. In the present study, pressure ultrafiltration coupled with chromatofocusing have proven to be effective methods of partially purifying a neurotrophic factor from adult chicken brains. This chick brain growth factor (CBGF) appears to be a heat-stable, basic peptide of low molecular weight (less than 6,000). It is a potent mitogen in vitro, at nanomolar concentrations, for both blastema cells and Swiss mouse 3T3 fibroblasts. CBGF is apparently distinct from other peptide mitogens and/or neuromodulators that have been reported to stimulate blastema growth in vivo and in vitro. These include substance P, FGF from bovine brain and pituitary, EGF, transferrin (sciatin), and spinal cord growth factor (SCGF). The possible relationship of CBGF to other neural regulatory molecules is discussed.
R L
RL
Carlone
M P
MP
Rathbone
D000818:Animals; D001681:Biological Assay; D001923:Brain Chemistry; D002454:Cell Differentiation; D002455:Cell Division; D002645:Chickens; D002851:Chromatography, High Pressure Liquid; D004591:Electrophoresis, Polyacrylamide Gel; D005121:Extremities / Q000187:drug effects; D006133:Growth Substances / Q000302:isolation & purification*; D006863:Hydrogen-Ion Concentration; D051379:Mice; D008970:Molecular Weight; D009419:Nerve Tissue Proteins / Q000302:isolation & purification*; D012038:Regeneration / Q000187:drug effects; D012455:Salamandridae; D013045:Species Specificity; D013373:Substance P / Q000494:pharmacology; D013936:Thymidine / Q000378:metabolism
D006133:Growth Substances; D009419:Nerve Tissue Proteins; C046909:chicken brain growth factor; D013373:Substance P; D013936:Thymidine