Shmuel Levartovsky

Barzilai Medical Center Ashkelon, Majdal, Southern District, Israel

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Publications (2)3.57 Total impact

  • Ehud Leibowitz · Shmuel Levartovsky
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    ABSTRACT: a 43-year-old woman instilled a drop of cyanoacrylate adhesive into her eye, mistaking the plastic container for a single-use vial of artificial tears (Refresh). Mild corneal and conjunctival erosions healed in 24 hours without reducing visual acuity. Similar packaging of containers of eye medications and toxic materials may lead to confusion, with the risk of serious ocular injury. An obvious distinction must be made between the containers to prevent this.
    No preview · Article · Apr 2012 · Annals of Ophthalmology
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    ABSTRACT: To investigate the presence and activity of protein phosphatase-2A (PPase2A), protein phosphatase-2C (PPase2C), and protein tyrosine phosphatases (PTPs) in the human aqueous humor (AH) of patients with primary open-angle glaucoma (POAG) and cataract and to study the correlation between these phosphatases and the redox state of the AH. Eighty-six cataract patients and 29 POAG patients who were scheduled for cataract surgery with or without glaucoma surgery were enrolled in the study. PPase2A, PPase2C, and PTPs levels in AH were measured by enzyme-linked immunosorbent assays, Western blot analyses, and spectral The redox state was measured by spectral and fluorescent methods. Phosphatase activity-positive results were significantly higher in AH samples from the POAG group (PP2A χ(2)(1) = 11.754, P < 0.01; PP2C χ(2)(1) = 8.754, P < 0.01; PTP χ(2)(1) = 11.073, P < 0.01). Western blot analysis revealed higher PP2C levels in the AH of glaucoma patients compared with PP2C levels in the AH of cataract patients (P = 0.012). Both oxidized/reduced glutathione ratios and superoxide dismutase levels in the AH were significantly higher in the glaucoma group than in the cataract group. Finally significant correlations were found between PP2A and PP2C, PP2A and PTP, and total antioxidant activity and PTP levels. There is a statistically significant difference between phosphatase levels in the AH of POAG patients and cataract patients. The phosphatase content of the AH represents tissue pathology, but their presence in the AH may be attributed to cell debris or to active signaling to other molecular events.
    No preview · Article · Feb 2012 · Investigative ophthalmology & visual science