Basal properties of MPP-dentate granule cell synapses are
altered in GFRα2 −/− mice. The initial slope of the field
excitatory postsynaptic potential plotted against the presynaptic fiber
volley for Schaffer collateral-CA1 (A) and LPP- and
MPP-dentate granule cell synapses (B and
C, respectively). Note the significantly lower efficacy
of excitatory transmission in MPP-granule cell synapses in GFRα2
−/− mice. No differences are observed between wild-type and
knock-out animals for Schaffer collateral-CA1 and LPP-granule cell
synapses. Paired-pulse facilitation in Schaffer collateral-CA1
(D) and LPP-granule cell synapses (E),
and PPD in MPP-dentate granule cell synapses (F),
respectively, are not altered in GFRα2 −/− mice. *,
P < 0.05, Student's unpaired t
test. Data are obtained from four to six slices of GFRα2 +/+ and
−/− mice, respectively.