We compared the expression of
RPE cell markers in transplanted cells in vivo against cells re-plated and cultured in parallel.
(D) Expression of the same
RPE cell markers is maintained in vivo by iPS - RPE (white arrows) 8 days following transplantation into the subretinal space of the RCS rat.
(E) Western blot analysis of iPS - RPE protein expression using antibodies against a panel of
RPE cell markers.
Not exact matches
The differentiated
RPE cells exhibit native characteristics including morphology, pigmentation,
marker expression, monolayer integrity, polarization and phagocytic activity.
(B) High power image showing pigment granule - containing donor
cells in the
RPE - L region that are positive for human nuclear
marker (arrows).
The pigmented subretinal donor
cells failed to express two characteristic
RPE markers,
RPE65 [57] and bestrophin [58], arguing against the possibility that they had undergone full transdifferentiation.
(E) Rhodopsin - positive material (red) is present within the
cell membrane of human specific
marker (HSM)- labelled iPS -
RPE (green) 8 days post-transplantation and in the tips of the host outer segment (OS) layer.
Confocal microscopy through
cells labelled with the apical
marker ATP1B1 demonstrated that POS are internalized by iPS -
RPE (Fig. 4A and Movie S1).
We found that differentiated iPS -
RPE cells were morphologically similar to, and expressed numerous
markers of developing and mature
RPE cells.
However, the transplanted
cells maintained expression of
RPE markers such as RLBP1 and OTX2, with only occasional
cells positive for Ki67.
After 8 days in culture, the re-plated iPS -
RPE cells were fixed and stained for
RPE - associated
markers (Fig. 5C).
Internalization of POS is observed in a single optical y - axis projection (< 1 µm) of pigmented iPS -
RPE cells labelled with the apical
cell surface
marker ATP1B1 (red).
(C) Retention of
RPE markers by iPS -
RPE cells in vitro after dissociation, re-plating and culturing for 8 days.