Increased expression of periostin and tenascin-C in eyes with neovascular glaucoma secondary to PDR

Keijiro Ishikawa, Ri ichiro Kohno, Kenichiro Mori, Yusuke Murakami, Shintaro Nakao, Masato Akiyama, Shigeo Yoshida, Koh Hei Sonoda

Research output: Contribution to journalArticle

Abstract

Purpose: To investigate periostin (PN) and tenascin-C (TNC) expression in the aqueous humor and trabeculectomy specimens of patients with neovascular glaucoma (NVG) secondary to proliferative diabetic retinopathy (PDR). Methods: This study enrolled 37 eyes of 37 patients who were grouped into (1) NVG secondary to PDR (NVG; n = 8); (2) PDR without NVG (PDR; n = 9); (3) primary open-angle glaucoma (POAG; n = 11); and (4) cataract surgery patients as a control group (CG; n = 9). Aqueous humor samples were collected from the anterior chamber at the start of surgery or intravitreal injection of anti-VEGF drug. The concentrations of PN, TNC, VEGF, and TGF-β2 (transforming growth factor-beta 2) were measured by ELISA. Sclerostomy tissues containing trabecular meshwork were obtained from two NVG patients and a POAG patient who underwent trabeculectomy surgery. Immunohistochemical analyses were performed to determine the localization of PN and TNC expression in the sclerostomy tissues. Results: PN and TNC-C levels were below detection threshold in the POAG and CG groups. The NVG group had significantly higher levels of PN and TNC compared with the PDR group (84.7 ng/ml vs 2.2 ng/ml and 18.5 ng/ml vs 4.6 ng/ml, respectively; p < 0.05). There was a significant correlation between the levels of PN and TNC-C in the NVG group (r = 0.86, p < 0.05). We found significant expression of PN in the trabecular meshwork and Schlemm’s canal of sclerostomy tissues excised from patients with NVG. Conclusions: Increased PN and TNC expression suggests their possible involvement in the pathogenesis of NVG secondary to PDR.

Original languageEnglish
Pages (from-to)621-628
Number of pages8
JournalGraefe's Archive for Clinical and Experimental Ophthalmology
Volume258
Issue number3
DOIs
Publication statusPublished - Mar 1 2020

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All Science Journal Classification (ASJC) codes

  • Ophthalmology
  • Sensory Systems
  • Cellular and Molecular Neuroscience

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