TABLE 1.

Effects of day in culture and of treatments with EGF and epinephrine on the expression of the P2X₇ receptor

EGF	−		+		−		+
Epinephrine	−		−		+		+
Day in culture	2	6	2	6	2	6	2	6
P2X7 receptor forms (kDa)
85	10	80 ± 15a	10 ± 5	80 ± 5	10 ± 5	20 ± 5b	10 ± 5	5 ± 2b
75								10 ± 3
65	10	3 ± 2	10 ± 2	3 ± 2	5 ± 2b	1 ± 1b	20 ± 5	1 ± 2b
18	10	70 ± 10	10 ± 5	110 ± 10b	10 ± 5	150 ± 25b	500 ± 15b	350 ± 30b

Data are means (± SD) of densitometry analyses of three experiments (see Fig. 5).

^aArbitrary densitometric values normalized to the expression of the various P2X₇ receptor forms in d-2 cells not treated with EGF or epinephrine.

^bP < 0.05–0.01 compared with bands’ densities in d-2 cells not treated with EGF or epinephrine.