Metabolomic profiling of reactive persulfides and polysulfides in the aqueous and vitreous humors

Hiroshi Kunikata, Tomoaki Ida, Kota Sato, Naoko Aizawa, Tomohiro Sawa, Hiroshi Tawarayama, Namie Murayama, Shigemoto Fujii, Takaaki Akaike, Toru Nakazawa

研究成果: Article査読

22 被引用数 (Scopus)

抄録

We investigate the metabolomic profile of reactive persulfides and polysulfides in the aqueous and vitreous humors. Eighteen eyes of 18 consecutive patients with diabetes mellitus (DM) and diabetic retinopathy underwent microincision vitrectomy combined with cataract surgery. Samples of the aqueous and vitreous humors were collected and underwent mass spectrometry-based metabolomic profiling of reactive persulfides and polysulfides (polysulfidomics). The effect of reactive polysulfide species on the viability of immortalized retinal cells (the RGC-5 cell line) under oxidative stress (induced with H 2 O 2) was also evaluated with an Alamar Blue assay. The experiments showed that cysteine persulfides (CysSSH), oxidized glutathione trisulfide (GSSSG) and cystine were elevated in the aqueous humor, and CysSSH, Cys, and cystine were elevated in the vitreous. Furthermore, GSSSG, cystine, and CysSSH levels were correlated in the aqueous and vitreous humors. A comparison, in DM and control subjects, of plasma levels of reactive persulfides and polysulfides showed that they did not differ. In vitro findings revealed that reactive polysulfide species increased cell viability under oxidative stress. Thus, various reactive persulfides and polysulfides appear to be present in the eye, and some reactive sulfide species, which have a protective effect against oxidative stress, are upregulated in the aqueous and vitreous humors of DM eyes.

本文言語English
論文番号41984
ジャーナルScientific reports
7
DOI
出版ステータスPublished - 2017 2 7

ASJC Scopus subject areas

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