title: p21WAF1-derived peptides linked to an internalization peptide inhibit human cancer cell growth.
abstract: We tested the ability of synthetic peptides derived from p21(WAF1), fused to the internalization peptide sequence derived from Antennapedia, to inhibit the growth of cancer cells in two human ovarian cancer cell lines expressing wild-type p53 or not. Two fused peptides corresponding to p21(WAF1) regions 17-33 and 63-77 inhibited cell growth in both cell lines while the same peptides without the internalization sequence were inactive. The fused peptides prevented growth at concentrations which inhibited cyclin-dependent kinase 2 and cdc2 activity, thus demonstrating that the peptides act by mimicking the action of p21(WAF1) on kinases. This study illustrates the potential pharmacological use of small peptides fused with the Antennapedia internalization sequence in proliferative disorders. The approach may be extended to other diseases in which cell penetration of a peptide may be of therapeutic benefit. More stable drug-like molecules with better pharmacological properties could be designed based on the results obtained with peptides.
authors.affiliation: Molecular Pharmacology Unit, Istituto di Ricerche Farmacologiche Mario Negri, Milan, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Bonfanti
authors.forename: S
authors.initials: S
authors.lastname: Taverna
authors.forename: M
authors.initials: M
authors.lastname: Salmona
authors.forename: M
authors.initials: M
authors.lastname: D'Incalci
authors.forename: M
authors.initials: M
authors.lastname: Broggini
mesh_terms: D051943:Antennapedia Homeodomain Protein; D000970:Antineoplastic Agents / Q000737:chemistry / Q000378:metabolism / Q000494:pharmacology*; D042846:CDC2-CDC28 Kinases; D002455:Cell Division / Q000187:drug effects; D051357:Cyclin-Dependent Kinase 2; D050759:Cyclin-Dependent Kinase Inhibitor p21; D018844:Cyclin-Dependent Kinases / Q000037:antagonists & inhibitors; D016213:Cyclins / Q000737:chemistry*; D005260:Female; D005434:Flow Cytometry; D018398:Homeodomain Proteins / Q000737:chemistry*; D006801:Humans; D009687:Nuclear Proteins; D010051:Ovarian Neoplasms / Q000188:drug therapy / Q000378:metabolism / Q000473:pathology; D010446:Peptide Fragments / Q000737:chemistry / Q000378:metabolism / Q000494:pharmacology*; D017346:Protein Serine-Threonine Kinases / Q000037:antagonists & inhibitors; D011993:Recombinant Fusion Proteins / Q000737:chemistry / Q000378:metabolism / Q000494:pharmacology*; D014157:Transcription Factors; D014407:Tumor Cells, Cultured / Q000187:drug effects
chemical_list: D051943:Antennapedia Homeodomain Protein; D000970:Antineoplastic Agents; C493956:CDKN1A protein, human; D050759:Cyclin-Dependent Kinase Inhibitor p21; D016213:Cyclins; D018398:Homeodomain Proteins; D009687:Nuclear Proteins; D010446:Peptide Fragments; D011993:Recombinant Fusion Proteins; D014157:Transcription Factors; D017346:Protein Serine-Threonine Kinases; D042846:CDC2-CDC28 Kinases; C495894:CDK2 protein, human; D051357:Cyclin-Dependent Kinase 2; D018844:Cyclin-Dependent Kinases