Vision preservation during retinal inflammation by anthocyanin-rich bilberry extract

Cellular and molecular mechanism

Seiji Miyake, Noriko Takahashi, Mariko Sasaki, Saori Kobayashi, Kazuo Tsubota, Yoko Ozawa

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

Anthocyanin-rich bilberry extract, a plant-derived antioxidant, has been utilized as a popular supplement for ocular health worldwide. However, it is unclear whether this extract has any biological effect on visual function, and the mechanism for such an effect is completely unknown. In this study, we generated a mouse model of endotoxin-induced uveitis (EIU) that shows retinal inflammation, as well as uveitis, by injecting lipopolysaccharide. We pretreated the mice with anthocyanin-rich bilberry extract and analyzed the effect on the retina. Anthocyanin-rich bilberry extract prevented the impairment of photoreceptor cell function, as measured by electroretinogram. At the cellular level, we found that the EIU-associated rhodopsin decreased and the shortening of outer segments in photoreceptor cells were suppressed in the bilberry-extract-treated animals. Moreover, the extract prevented both STAT3 activation, which induces inflammation-related rhodopsin decrease, and the increase in interleukin-6 expression, which activates STAT3. In addition to its anti-inflammatory effect, the anthocyanin-rich bilberry extract ameliorated the intracellular elevation of reactive oxygen species and activated NF-B, a redox-sensitive transcription factor, in the inflamed retina. Our findings indicate that anthocyanin-rich bilberry extract has a protective effect on visual function during retinal inflammation.

Original languageEnglish
Pages (from-to)102-109
Number of pages8
JournalLaboratory Investigation
Volume92
Issue number1
DOIs
Publication statusPublished - 2012 Jan

Fingerprint

Vaccinium myrtillus
Anthocyanins
Inflammation
Uveitis
Photoreceptor Cells
Rhodopsin
Endotoxins
Retina
Plant Extracts
Oxidation-Reduction
Lipopolysaccharides
Interleukin-6
Reactive Oxygen Species
Anti-Inflammatory Agents
Transcription Factors
Antioxidants

Keywords

  • anthocyanin
  • ERG
  • inflammation
  • oxidative stress
  • photoreceptor
  • retina
  • rhodopsin

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Cell Biology
  • Molecular Biology

Cite this

Vision preservation during retinal inflammation by anthocyanin-rich bilberry extract : Cellular and molecular mechanism. / Miyake, Seiji; Takahashi, Noriko; Sasaki, Mariko; Kobayashi, Saori; Tsubota, Kazuo; Ozawa, Yoko.

In: Laboratory Investigation, Vol. 92, No. 1, 01.2012, p. 102-109.

Research output: Contribution to journalArticle

Miyake, Seiji ; Takahashi, Noriko ; Sasaki, Mariko ; Kobayashi, Saori ; Tsubota, Kazuo ; Ozawa, Yoko. / Vision preservation during retinal inflammation by anthocyanin-rich bilberry extract : Cellular and molecular mechanism. In: Laboratory Investigation. 2012 ; Vol. 92, No. 1. pp. 102-109.
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