Bacteriophage biopanning in human tumour biopsies to identify cancer-specific targeting ligands.
Intravenous targeting of anticancer agents should improve both efficacy and therapeutic index. However, rational design of targeting constructs requires detailed definition of receptor targets and must take account of polarised tissue architecture that may restrict access to chosen receptors from the bloodstream. Bacteriophage biopanning provides a solution to this problem, identifying targeting sequences by functional selection rather than design, although reiterative panning in polarized human tumours has not previously been attempted. Here, we report an ex vivo, intra-arterial method for biopanning in freshly-resected human tumours, enabling reiterative selection of oligopeptide sequences capable of intravascular targeting to human colorectal tumours. Significant consensus was observed after two rounds of panning in tumours from different patients, and lead sequences demonstrated tumour targeting in samples from unrelated patients. This novel approach may be applicable to a wide range of settings, thus enabling iteration of consensus targeting sequences for tumour imaging and selective delivery of anticancer agents.
Maruta
Fukuto
F
Cancer Research UK Institute for Cancer Studies, University of Birmingham, and Department of Surgery, Selly Oak Hospital, UK.
Akita
Noriyuki
N
Nakayama
Jun
J
Miyagawa
Shinichi
S
Ismail
Tariq
T
Rowlands
David C
DC
Kerr
David J
DJ
Fisher
Kerry D
KD
Seymour
Leonard W
LW
Parker
Alan L
AL
D001158:Arteries / Q000378:metabolism*; D001435:Bacteriophages / Q000737:chemistry / Q000378:metabolism*; D001706:Biopsy; D015179:Colorectal Neoplasms / Q000098:blood supply* / Q000473:pathology*; D006801:Humans; D008024:Ligands; D009842:Oligopeptides / Q000008:administration & dosage / Q000378:metabolism; D019151:Peptide Library; D020539:Sequence Analysis, Protein
D008024:Ligands; D009842:Oligopeptides; D019151:Peptide Library