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B Lassalle

Publications and source records attributed to B Lassalle.

42 records · Page 3Linked to original sources
PubMed1975

[Effect of osmotic stress on the surface potential of the extremities of a triton, Pleurodeles waltlii Michah].

Surface potentials of Pleurodeles limb have been studied under the action of NaCl solution made hyperosmotic with various chemicals (choline, propionate, sucrose, urea). These potentials were suppressed or lowered to a variable extent according to the solution used. The interpretation of the mechanism of action of these chemicals has led us to propose an hypothesis on the origin of the electrical potentials of the epidermis.

Amphibians↗
PubMedDate not supplied

Cell kinetics (SAMBA 200) of estradiol stimulated long-term phenol red withdrawn cultured breast cancer cells.

When estradiol stimulation was performed on hormone-responsive MCF-7 human breast cancer cells maintained in phenol red-containing medium until 24h before experiments, the cell number and the cell surface transferrin receptor level, an early marker of estradiol stimulation, were strongly increased. In contrast, similar treatment performed on MCF-7 cells grown in phenol red-free medium up to 12 months before experiments induced no stimulating effect on the cell number, although transferrin receptors were still enhanced. Since the appearance of transferrin receptors occurs before the cells begin DNA synthesis in late G1 phase, we assumed that the discrepancy between cell counts and cell surface transferrin receptors might involve cell kinetic perturbations. The proportion of cells in the (S + G2) phases and the duration of the cell cycle phases were analysed using the SAMBA 200 cell image processor. The data presented in this study failed to indicate any block in the cell cycle and the duration of the S and G2 phases were found to be unchanged. The lack of effect of estradiol stimulation on the growth of MCF-7 cells maintained several months without phenol red is not thus a consequence of cell cycle perturbations.

Breast Neoplasms↗