Soybean β-Conglycinin Prevents Age-Related Hearing ImpairmentReport as inadecuate




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Obesity-related complications are associated with the development of age-related hearing impairment. β-Conglycinin β-CG, one of the main storage proteins in soy, offers multiple health benefits, including anti-obesity and anti-atherosclerotic effects. Here, to elucidate the potential therapeutic application of β-CG, we investigated the effect of β-CG on age-related hearing impairment. Male wild-type mice age 6 months were randomly divided into β-CG-fed and control groups. Six months later, the body weight was significantly lower in β-CG-fed mice than in the controls. Consumption of β-CG rescued the hearing impairment observed in control mice. Cochlear blood flow also increased in β-CG-fed mice, as did the expression of eNOS in the stria vascularis SV, which protects vasculature. β-CG consumption also ameliorated oxidative status as assessed by 4-HNE staining. In the SV, lipofuscin granules of marginal cells and vacuolar degeneration of microvascular pericytes were decreased in β-CG-fed mice, as shown by transmission electron microscopy. β-CG consumption prevented loss of spiral ganglion cells and reduced the frequencies of lipofuscin granules, nuclear invaginations, and myelin vacuolation. Our observations indicate that β-CG ameliorates age-related hearing impairment by preserving cochlear blood flow and suppressing oxidative stress.



Author: Tohru Tanigawa , Rei Shibata , Kazuhisa Kondo, Nobuyuki Katahira, Takahiro Kambara, Yoko Inoue, Hiroshi Nonoyama, Yuichiro Horibe

Source: http://plos.srce.hr/



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