Jens Cameron

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PURPOSE To compare the pharmacokinetics and tissue response between intravitreal and microcannulation injections into the suprachoroidal space using bevacizumab. METHODS Sixty-two pigs were studied. Either a pars plana intravitreal bevacizumab or a viscoelastic-enhanced microcannula suprachoroidal injection was performed with either 1.25 mg (group 1) or 3(More)
PURPOSE To design a new model of proliferative vitreoretinopathy (PVR) that would not rely on the addition of exogenous cells. The release of endogenous cells from surrounding attachments seems to be an early event in the pathogenesis of PVR. Because the proteolytic enzyme dispase dissociates tissues, the hypothesis was that an intraocular injection of(More)
Optic pathway gliomas represent a specific subtype of astrocytoma with unique clinicopathologic and biologic properties, but studies of tumors in the optic nerve proper have been hampered by limited tissue availability. We analyzed optic nerve gliomas of 59 patients (median age, 9 years; range, 3 months-66 years; 33 female, 26 male) using formalin-fixed(More)
Type IV collagen, a 500-kilodalton (alpha 1)2(alpha 2)1 heterotrimer with noncollagenous domains (NC1) is the major molecule in most basement membranes in the body. In addition to its structural role as scaffolding, type IV collagen is involved in promoting adhesion and migration of various cell types in vitro, including rabbit corneal epithelial cells.(More)
The role of the cortical vitreous in persistence of experimental retinal detachments was evaluated in cynomolgus monkeys. Detachments were created by subretinal injection of 20% autologous serum in Ringer's solution. A pars plana vitrectomy was performed on selected eyes with a Douvas vitrectomy instrument before creation of the detachment. Retinal holes(More)
Bietti's crystalline dystrophy (BCD) consists of small, yellow-white, glistening intraretinal crystals in the posterior pole, tapetoretinal degeneration with atrophy of the retinal pigment epithelium (RPE) and "sclerosis" of the choroid; in addition, sparking yellow crystals in the superficial marginal cornea are also found in many patients. BCD is(More)
Full-thickness explants of five human corneas grown in organ culture demonstrate that the migration of epithelium and endothelium is mutually limited once contact between the two cell types has been established. Two human corneas, however, failed to show this contact inhibition, and corneal epithelium surrounded completely the explant; both corneas showed(More)
BACKGROUND Previous studies support a role for mitogen-activated protein kinase pathway signaling, and more recently Akt/mammalian target of rapamycin (mTOR), in pediatric low-grade glioma (PLGG), including pilocytic astrocytoma (PA). Here we further evaluate the role of the mTORC1/mTORC2 pathway in order to better direct pharmacologic blockade in these(More)
PURPOSE We evaluated the in vivo functionality of a corneal endothelium tissue-engineered using corneal endothelial cells from human patients with Fuchs endothelial corneal dystrophy (FECD). METHODS A total of 15 healthy cats underwent full-thickness corneal transplantation. All transplants were of xenogeneic human origin and all grafts but two were(More)
PURPOSE Fibronectin promotes corneal epithelial cell adhesion and motility in vitro and plays an important role in corneal re-epithelialization during corneal wound healing. Multiple domains contribute to the adhesion- and motility-promoting activity of fibronectin. The aim of this study was to identify amino acid sequences that contribute to the rabbit(More)