What question did this study set out to answer?

The aim is to characterize the transformation of mouse mammary epithelial cells induced by DMBA.

Sequential Expression of Preneoplastic and Neoplastic Characteristics of Mouse Mammary Epithelial Cells Transformed in Organ Culture ,

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Randomized trial demonstrates sequential preneoplastic progression in mouse mammary cells, indicating tumorigenic potential.

The aim is to characterize the transformation of mouse mammary epithelial cells induced by DMBA.
Mammary cells from BALB/cAnN mice were transformed using DMBA in organ cultures.
Cells were transplanted into gland-free fat pads of syngeneic hosts to assess tumorigenicity across generations.
Analyzed both hyperplastic outgrowths and neoplastic progression through repeated transplantations over multiple generations.
22 of 44 nodule-like alveolar lesions produced hyperplastic outgrowths; 7 developed into mammary carcinomas.
Dissociated cells from DMBA-treated glands yielded 26 of 48 hyperplastic outgrowths with 8 being tumorigenic.
Twelve lines of hyperplasias displayed sequential tumorigenic behavior over 8-20 transplant generations.

Iyer et al. (1981) studied this question.

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