Einfluss der Selektiven Retinatherapie (SRT) auf inflammatorische Zellmediatoren des subretinalen Raums

Translated title of the contribution: Effect of Selective Retina Therapy (SRT) on the Inflammatory Microenvironment of the Subretinal Space

Elisabeth Richert, Sofya Bartsch, Jost Hillenkamp, Felix Treumer, Jan Tode, Claus von der Burchard, Alexa Karina Klettner, Johann Roider, Ralf Brinkmann

Abstract

PURPOSE: To investigate the effect of Selective Retina Therapy (SRT) on inflammatory key factors such as complement factor-C3 (CC3), tumor growth factor-beta2 (TGF-β2), tumor necrosis factor-alpha (TNF-α) and interferon-gamma (IFN-γ).

MATERIALS AND METHODS: Porcine RPE-Bruch's membrane-choroid explants were irradiated with two SRT laser systems, SRTYLF and SRTYAG (Nd : YLF laser, wave length 527 nm, pulse duration 1.7 µs and Nd : YAG laser, wave length 532 nm, pulse duration 2.4 - 3 µs). Laser irradiation was performed on a spot size of 200 × 200 µm, 30 pulses, with a repetition rate of 100 Hz, and a radiant exposure of 140 (threshold RPE death) and 180 mJ/cm2 per pulse (above threshold RPE death). Explants were cultivated in modified Ussing chambers and culture viability was assessed by calcein-AM cell staining. Secretion of inflammatory factors was analyzed by ELISA. Protein expression of tissue explants was assessed by Western blot.

RESULTS: Regeneration of RPE was observed after 4 days. One day after SRT with 140 mJ/cm2 per pulse the secretion of basal CC3 decreased in ELISA. Following 180 mJ/cm2 radiant exposure, the level of IFN-γ decreased at day 4.

CONCLUSION: SRT does not induce the release of the pro-inflammatory factors analyzed in this in-vitro study.

Translated title of the contributionEffect of Selective Retina Therapy (SRT) on the Inflammatory Microenvironment of the Subretinal Space
Original languageGerman
JournalKlin Monatsbl Augenheilkd
ISSN0023-2165
DOIs
Publication statusPublished - 02.05.2019

Research Areas and Centers

  • Academic Focus: Biomedical Engineering

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