BIN1-immunoreactive (-ir) neuropil signal in CA1 reflects axonal density.
(A)
Area of BIN1-ir neuropil positively correlates with total number of pyramidal neurons in CA1 (p = 0.009). Symbols indicate subject group: (•) CDR0, BB0; (▪) CDR0-0.5, BBII-III; (▲) CDR1-2, BBIV-V.
(B)
BIN1 (brown) and neurofilament (red) dual IHC in CA1 with insets c, d. *Indicates alveus.
(C)
Inset (from area ‘c’ in
B
) highlights BIN1-ir neuropil puncta (brown, arrows) along a neurofilament-ir process (red, arrowheads) in CA1.
(D)
Inset (from area ‘d’ in
B
) highlights a similar staining pattern at the junction with alveus. Scale bars:
B
, 100 μm;
C, D
, 20 μm.