title: Promotion of neurite outgrowth from fetal hippocampal cells by TNF-alpha receptor 1-derived peptide.
abstract: Cytokines such as tumor necrosis factor-alpha (TNF-alpha), FasL, and TNF-related apoptosis-inducing ligand (TRAIL) induce apoptosis or inflammation through binding to their specific receptors, TNFR1, Fas, and DR5, respectively. We have previously reported ligand-binding and cell death-inhibiting synthetic peptides, which were designed based on the crystal structure of a ligand-receptor complex and the homology of the amino acid sequence among the death receptor family members. Here we show that, among these death receptor-derived peptides, the TNFR1-derived peptide specifically arrested cell proliferation and promoted cell adhesion of fetal rat (E16) hippocampal cells, and promoted neurite outgrowth from hippocampus-derived neurospheres cultured with the addition of the peptide or cultured on a peptide-coated surface. Furthermore, among these death receptor-derived peptides, marked neurite outgrowth was observed only when the neurospheres were cultured on a TNFR1-derived peptide-conjugated covalently cross-linked alginate gel. The neurites from the neurospheres positively immunostained with an antibody against neurofilaments. These results suggest that the TNFR1-derived peptide promotes neuronal differentiation of the hippocampal neural stem cells and the TNFR1-derived peptide-conjugated covalently cross-linked alginate gel may be a useful material for assisting neural stem cell transplantation.
authors.affiliation: Graduate School of Materials Science, Nara Institute of Science and Technology, Ikoma, Japan.
authors.forename: Kazumi
authors.initials: K
authors.lastname: Kajiwara
authors.forename: Shin-ichi
authors.initials: S
authors.lastname: Ogata
authors.forename: Masao
authors.initials: M
authors.lastname: Tanihara
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D051017:Apoptosis Regulatory Proteins / Q000737:chemistry / Q000378:metabolism; D002448:Cell Adhesion / Q000187:drug effects; D002454:Cell Differentiation / Q000187:drug effects; D048708:Cell Growth Processes / Q000187:drug effects; D005260:Female; D006624:Hippocampus / Q000166:cytology* / Q000187:drug effects*; D006801:Humans; D007150:Immunohistochemistry; D008562:Membrane Glycoproteins / Q000737:chemistry / Q000378:metabolism; D008958:Models, Molecular; D008969:Molecular Sequence Data; D016501:Neurites / Q000187:drug effects / Q000502:physiology* / Q000648:ultrastructure; D010446:Peptide Fragments / Q000138:chemical synthesis / Q000494:pharmacology*; D011247:Pregnancy; D051381:Rats; D017208:Rats, Wistar; D047888:Receptors, Tumor Necrosis Factor, Type I / Q000737:chemistry*; D013234:Stem Cells / Q000187:drug effects*; D053221:TNF-Related Apoptosis-Inducing Ligand; D014409:Tumor Necrosis Factor-alpha / Q000737:chemistry / Q000378:metabolism / Q000494:pharmacology*
chemical_list: D051017:Apoptosis Regulatory Proteins; D008562:Membrane Glycoproteins; D010446:Peptide Fragments; D047888:Receptors, Tumor Necrosis Factor, Type I; D053221:TNF-Related Apoptosis-Inducing Ligand; C505653:TNFSF10 protein, human; C505655:Tnfsf10 protein, rat; D014409:Tumor Necrosis Factor-alpha