From synthesis to biologics: preclinical data on a chemistry derived anticancer vaccine.
A fully synthetic anticancer vaccine 2 has been prepared via bioconjugation of unimolecular pentavalent construct 1-containing five prostate and breast cancer associated carbohydrate antigens, Globo-H, GM2, STn, TF and Tn-to maleimide-modified carrier protein KLH. An improved conjugation protocol has been developed, which allowed us to obtain a higher epitope ratio of the unimolecular pentavalent glycopeptide antigen to the carrier protein (505/1 versus 228/1 for the previous version). KLH conjugate 2 has been subsequently submitted to preclinical immunogenic evaluation in mice in the presence of QS-21 as an adjuvant. Through standard ELISA assay, this vaccine candidate showed high promise in inducing IgG and IgM antibodies against each of the five individual carbohydrate antigens. In addition, FACS analysis indicated that these antibodies were able to react with MCF-7 breast cancer cell lines expressing these five carbohydrate antigens.
Zhu
Jianglong
J
Laboratory for Bioorganic Chemistry, Clinical Immunology Service, Department of Medicine, Sloan-Kettering Institute for Cancer Research, 1275 York Avenue, New York, New York 10065, USA.
Wan
Qian
Q
Lee
Dongjoo
D
Yang
Guangbin
G
Spassova
Maria K
MK
Ouerfelli
Ouathek
O
Ragupathi
Govind
G
Damani
Payal
P
Livingston
Philip O
PO
Danishefsky
Samuel J
SJ
D000818:Animals; D000917:Antibody Formation / Q000276:immunology; D015295:Antigens, Tumor-Associated, Carbohydrate / Q000737:chemistry / Q000276:immunology*; D001666:Binding Sites, Antibody; D001943:Breast Neoplasms / Q000276:immunology / Q000517:prevention & control; D019496:Cancer Vaccines / Q000737:chemistry* / Q000276:immunology*; D045744:Cell Line, Tumor; D005260:Female; D006433:Hemocyanins / Q000737:chemistry / Q000276:immunology*; D006801:Humans; D008297:Male; D008301:Maleimides / Q000737:chemistry; D051379:Mice; D008810:Mice, Inbred C57BL; D011471:Prostatic Neoplasms / Q000276:immunology / Q000517:prevention & control; D014614:Vaccines, Synthetic / Q000737:chemistry* / Q000276:immunology*
D015295:Antigens, Tumor-Associated, Carbohydrate; D019496:Cancer Vaccines; D008301:Maleimides; D014614:Vaccines, Synthetic; C043592:maleimide; D006433:Hemocyanins; C032808:keyhole-limpet hemocyanin