Betty Tarnowski

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Recent work demonstrated that a mannose receptor is involved in the phagocytosis of rod outer segments by the rat retinal pigment epithelium (RPE). In this study the binding of soluble mannose-containing ligands by human RPE explants is described. In addition, the authors report the isolation of a mannose receptor from human RPE and describe its(More)
We report here the presence of a mannose-specific receptor on apical membranes of rat retinal pigment epithelial (RPE) cells. For pinocytic studies, 125I-Mannose-BSA (125I-Man-BSA) was incubated with RPE explants from normal (Long Evans) and dystrophic (pigmented RCS) rat retinas. Normal RPE bound 36.1 ng of ligand and, in the presence of mannan competitor,(More)
The pigmented epithelium of the vertebrate retina phagocytizes the discarded tips of photoreceptors and it is likely that a specific cellular recognition process is involved in this phenomenon. The apical surface of retinal pigmented epithelium (RPE) contains microvilli which interdigitate with the outer segment regions of photoreceptor cells and it is this(More)
The retinal pigment epithelium (RPE) phagocytizes the tips of photoreceptor outer segments (OS) during normal eye function. It is not known what ligand on OS is recognized by the RPE for removal from the interphotoreceptor matrix. It is possible that a sugar residue on a cell surface glycoconjugate of either the OS or RPE mediates the phagocytic(More)
The Mouse Models of Human Cancers Consortium (MMHCC) is a collaborative program designed to derive and characterize mouse models of human malignancies. To enhance information and resource exchange among the MMHCC investigators and other cancer research scientists, the NCI Center for Bioinformatics (NCICB, has developed web-based(More)
Latex beads coated with mucin (a sialic acid containing glycoconjugate), N-acetylglucosamine (GlcNAc), or with the lectins, succinylated wheat germ agglutinin (sWGA) (binds to GlcNAc) or Limax flavus agglutinin (LFA) (binds to sialic acid residues) were used as phagocytic particles. Phagocytosis of these coated beads by retinal pigment epithelial (RPE)(More)
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