Gangliosides of organ-confined versus metastatic androgen-receptor-negative prostate cancer.
Prior development of a unique androgen-receptor (AR)-negative cell line (HH870) from organ-confined (T2b) human prostate cancer (CaP) enabled comparison of the gangliosides associated with normal and neoplastic prostate epithelial cells, organ-confined versus metastatic (DU 145, PC-3), and AR-negative versus AR-positive CaP cell lines. Resorcinol-HCl and specific monoclonal antibodies were used to characterize gangliosides on 2D-chromatograms, and to visualize them on the cell surface with confocal-fluorescence microscopy. AR-negative cells expressed GM1b, GM2, GD2, GD1a, and GM3. GM1a, GD1b, and GT1b were undetectable. GM1b and GD1a were more prominent in AR-negative than in AR-positive cells. PC-3 and HH870 cells were unique in the expression of O-acetylGD2 (O-AcGD2) and two alpha2,3-sialidase-resistant, alkali-susceptible GMR17-reactive gangliosides. Expression of GD1a, GM1b, doublets of GD3, GD2, and O-AcGD2, and the presence of an additional alkali-labile-14.G2a-reactive ganglioside, two alkali-susceptible, and three alkali-resistant GMR17-reactive gangliosides makes HH870 a potential component of a polyvalent-vaccine for active-specific immunotherapy of CaP.
Ravindranath
Mepur H
MH
Laboratory of Glycoimmunotherapy, John Wayne Cancer Institute, 2200 Santa Monica Blvd., Santa Monica, CA 90404-2302, USA. Ravindranathm@jwci.org
Muthugounder
Sakunthala
S
Presser
Naftali
N
Selvan
Senthamil R
SR
Portoukalian
Jacques
J
Brosman
Stanley
S
Morton
Donald L
DL
D000818:Animals; D000911:Antibodies, Monoclonal / Q000378:metabolism; D045744:Cell Line, Tumor; D004847:Epithelial Cells / Q000166:cytology / Q000378:metabolism; D005732:Gangliosides / Q000737:chemistry* / Q000378:metabolism; D006801:Humans; D008297:Male; D051379:Mice; D008875:Middle Aged; D011467:Prostate / Q000166:cytology / Q000378:metabolism; D011471:Prostatic Neoplasms / Q000737:chemistry* / Q000378:metabolism / Q000473:pathology*; D011944:Receptors, Androgen
D000911:Antibodies, Monoclonal; D005732:Gangliosides; D011944:Receptors, Androgen