David el-Chai Ben-Ezra

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PURPOSE To study the combination of oligodeoxynucleotides (ODNs) intravitreous injection and saline transpalpebral iontophoresis on the delivery of ODNs to photoreceptors in the newborn rd1/rd1 mice. METHODS Cathodal or anodal transpalpebral iontophoresis (1.43 mA/cm(2) for 5 min) was applied to eyes of postnatal day 7 (PN7) rd1/rd1 mice immediately(More)
PURPOSE To study the kinetics of polylactide (PLA) nanoparticle (NP) localization within the intraocular tissues and to evaluate their potential to release encapsulated material. METHODS A single intravitreous injection (5 micro L) of an NP suspension (2.2 mg/mL) encapsulating either Rh-6G (Rh) or Nile red (Nr) was performed. Animals were killed at(More)
PURPOSE To reexamine the possible effect of human thrombospondin on in vivo angiogenesis. METHODS In vivo angiogenesis in the rabbit cornea was induced by implants of Elvax-40 sequestering human recombinant basic fibroblast growth factor (bFGF) or bacterial endotoxin lipopolysaccharide (LPS). Implants sequestering various concentrations of thrombospondin(More)
PURPOSE To evaluate the antimitotic and toxic effects of 5-chlorouracil (5-CU) and 5-fluorouracil (5-FU) and study their potential to delay filtering bleb closure in the rabbit eye when released by poly(ortho esters) (POE). METHODS Rabbit Tenon fibroblasts and human conjunctival cells were incubated with various 5-CU and 5-FU concentrations.(More)
In the rabbit, after oral ingestion of 20 mg/kg/day of cyclosporin A (CsA) a high level of the drug is found in the blood. This level increases steadily during the first 3 days, leveling off by days 5-7. Although the blood level of CsA was within the "therapeutic window" of 400-600 ng/ml, the drug was not detected within the ocular tissues. Local(More)
PURPOSE Corticosteroids have recorded beneficial clinical effects and are widely used in medicine. In ophthalmology, besides their treatment benefits, side effects, including ocular toxicity have been observed especially when intraocular delivery is used. The mechanism of these toxic events remains, however, poorly understood. In our present study, we(More)
The distribution of cyclosporin A (CsA) in the blood, saliva, tears, aqueous humour, vitreous, and cerebrospinal fluid has been studied after oral treatment with 5 mg/kg/day of CsA or application of 2% CsA eye drops in olive oil solution. After oral treatment all patients had high CsA levels in blood. Measurable levels of CsA were also found in the saliva(More)
Rabbits immunized against lens extracts from various other (xenogeneic) species reacted well with the immunizing lens extracts by immunological assays measuring either humoral or cellular immune responses. A dissociation was observed, however, between the humoral and cellular immune responses when lenses from rabbit (allogeneic) or from nonimmunizing(More)
The immunohistologic properties of two monoclonal antibodies produced by hybridomas generated from bovine retinal S-antigen (S-Ag) immunized mice were investigated. These monoclonal antibodies demonstrated a low antibody titer to the original S-Ag preparation by the ELISA method. Immunohistologic studies using avidin-biotin-peroxidase complex (ABC) showed(More)
Increasing mortality in intravenous (IV) drug users not reported to surveillance as acquired immunodeficiency syndrome (AIDS) has occurred in New York City coincident with the AIDS epidemic. From 1981 to 1986, narcotics-related deaths increased on average 32% per year from 492 in 1981 to 1996 in 1986. This increase included deaths from AIDS increasing from(More)