title: Inhibitory effects of transforming growth factor-beta1 pretreatment on experimental pulmonary metastasis of MCS-1 Chinese hamster mesenchymal chondrosarcoma cells.
abstract: Recent studies have suggested that transforming growth factor(TGF)-beta1 acts as a multifunctional regulator of cell growth, and also modifies tumor progression and metastasis. In the present study, we investigated the effects of TGF-beta1 on the proliferation and experimental pulmonary metastasis of MCS-1. MCS-1 are undifferentiated type cloned tumor cells established from a mesenchymal chondrosarcoma which spontaneously occurred in the soft tissue of a female Chinese hamster. MCS-1 cells were pretreated with TGF-beta1 (0, 0.05, 0.5, 2, 10 ng/ml) for 72 hours in a medium containing 1% fetal bovine serum, then tested for in vitro growth by the MTT method, in vivo growth by subcutaneous inoculation into athymic nude mice (1 x 10(6) cells/mouse) and experimental pulmonary metastasis by injection into the lateral tail vein of athymic nude mice (5 x 10(4) cells/mouse). TGF-beta1 significantly inhibited in vitro growth of MCS-1, depending on its concentrations, and also experimental metastasis with maximal inhibition at 0.5 or 2 ng/ml treatment compared to untreated controls. TGF-beta1, however, was ineffective for in vivo subcutaneous growth of MCS-1. These results indicated that TGF-beta1 might be an inhibitor of metastasis of mesenchymal chondrosarcomas including other types of non-epitherial cartilage or bone formation tumors.
authors.affiliation: Institute for Laboratory Animals, Niigata University School of Medicine, Japan. arinomi@med.niigata-u.ac.jp
authors.forename: N
authors.initials: N
authors.lastname: Fujisawa
authors.forename: N L
authors.initials: NL
authors.lastname: Sato
authors.forename: T I
authors.initials: TI
authors.lastname: Motoyama
mesh_terms: D000818:Animals; D001859:Bone Neoplasms / Q000188:drug therapy / Q000473:pathology*; D002417:Cattle; D018211:Chondrosarcoma, Mesenchymal / Q000188:drug therapy / Q000473:pathology*; D006224:Cricetinae; D005260:Female; D008175:Lung Neoplasms / Q000517:prevention & control* / Q000556:secondary*; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D009368:Neoplasm Transplantation; D016212:Transforming Growth Factor beta / Q000008:administration & dosage*; D014183:Transplantation, Heterologous
chemical_list: D016212:Transforming Growth Factor beta