Fig. 5.
Effects of lipolytic agents on pHSLser660 in subpopulations of 3T3L1 cells. 3T3L1 adipocytes were exposed to the indicated concentrations (μM) of ANP, ISO, FSK, and Lys-γ3-MSH and assayed for pHSLser660. The cells were then fixed and observed for nuclei, lipid droplets, and pHSLser660 and scanned using a 20 × objective (four images per well, an average of 481 cells/well). Data from the total population of cells are shown as white bars. Subpopulations of cells with a small degree of lipid droplet content (Small Lm, gray bars) or a high degree of lipid droplet content (Large Lm, black bars) were identified by CyteSeer utilizing the criteria of Table 3. (A–E) represent Area Pm, API Pi Pm, M Pr, M1, and Tan, respectively, and each bar is the mean ± SD for n = 16 wells. Within each population of cells the effects of ISO, FSK, and Lys-γ-MSH were significant versus control at P < 0.001 (asterisks were omitted for clarity). aDifferent from the Total population and the Small Lm subpopulation (P < 0.05); bdifferent from the Small Lm subpopulation (P < 0.05); cdifferent from the Total population (P < 0.05). ANP, atrial natriuretic peptide; FSK, Forskolin.