title: Cloned murine non-malignant, spontaneously transformed and chemical tumour-derived cell lines related to the type 2 pneumocyte.
abstract: NAL1A is a murine type 2 pneumocyte-related cell line cultured from normal BALB/c adult mouse lung. In vitro spontaneous transformation of 3 out of 7 clones of NAL1A has led to the isolation and establishment in continuous cell culture of sibling-related non-neoplastic (NAL1A) and spontaneously arising neoplastic (NAL1As) cell strains. NAL1As cells exhibited a similar phenotype to cloned NUL1 cells cultured from urethane-induced mouse lung adenomas. All NAL1As and NUL1 clones grew vigorously in 0.3% agar and formed invasive, poorly differentiated carcinomas following subcutaneous inoculation into immunesuppressed mice. Several subcutaneous nodules metastasised preferentially to the lung. All spontaneous and chemically-derived malignant clones were less differentiated than the non-malignant clones as assessed by staining with a type 2 pneumocyte-specific polyclonal antiserum. The clones described in this report form a useful model in the study of spontaneous and chemically-induced neoplastic transformation in mouse epithelial lung cells.
authors.affiliation: Carcinogenesis Research Unit, School of Pathology, University of N. S. W., Kensington, Australia.
authors.forename: J M
authors.initials: JM
authors.lastname: Bentel
authors.forename: A W
authors.initials: AW
authors.lastname: Lykke
authors.forename: G J
authors.initials: GJ
authors.lastname: Smith
mesh_terms: D000236:Adenoma / Q000473:pathology; D000818:Animals; D002454:Cell Differentiation; D002455:Cell Division; D002461:Cell Line, Transformed; D002471:Cell Transformation, Neoplastic / Q000473:pathology*; D002999:Clone Cells / Q000166:cytology; D007124:Immunoenzyme Techniques; D008168:Lung / Q000166:cytology*; D008175:Lung Neoplasms / Q000473:pathology* / Q000556:secondary; D051379:Mice; D008807:Mice, Inbred BALB C; D010641:Phenotype; D014407:Tumor Cells, Cultured