gal3-/- mice according to Delmotte and Sanderson (2006),
with minor modifications. The trachea were removed and sliced into 0.5mm-wide
rings. The rings were washed three times in pre-warmed DMEM 4.5g/l glucose
medium (Life Technologies) complemented with 25mM HEPES (pH 7.4) and mounted in
a home made chamber, in the same medium. This experiment was carried out using
three tracheal explants per animal. Video acquisitions of cilium beating profile
were performed using a LEICA DMI6000, a high-resolution camera CoolSnap HQ2
(Photometrics, Tucson, AZ) and MetaMorph 6 software (Molecular Devices,
Sunnyvale, CA). It was performed on N=7 wt and N=7 gal3-/-mice, using three tracheal explants per animal.
To record ciliary flow, suspensions of 0.2μm fluorescent
polystyrene beads (Sigma) were applied on N=6 wt and N=6
gal3-/- tracheal rings. Automatic bead tracking and
movement calculations were performed using IMARIS 7.0 (Bitplane, Zurich).