Abstract
Background: Sarcopenia, characterized by muscle mass decline due to aging or other causes, is exacerbated by decreased estrogen levels after menopause in women. Isoflavones, a class of flavonoids acting on estrogen receptors, may have beneficial effects on metabolic disorders. We examined these effects in ovariectomized mice fed a high-fat, high-sucrose diet (HFHSD). Methods: At 7 weeks old, female C57BL6/J mice (18–20 g, n = 12) underwent bilateral ovariectomy (OVX), and were then fed a high-fat, high-sucrose diet starting at 8 weeks of age. Half of the mice received isoflavone water (0.1%). Metabolic analyses, including glucose and insulin tolerance tests, were conducted. Muscle analysis involved grip strength assays, next-generation sequencing, quantitative RT–PCR, and western blotting of skeletal muscle after euthanizing the mice at 14 weeks old. Additionally, 16S rRNA gene sequence analysis of the gut microbiota was performed. Results: The results demonstrated that isoflavone administration did not affect body weight, glucose tolerance, or lipid metabolism. In contrast, isoflavone-treated mice had higher grip strength. Gene expression analysis of the soleus muscle revealed decreased Trim63 expression, and western blotting showed inactivation of muscle-specific RING finger protein 1 in isoflavone-treated mice. Gut microbiota analysis indicated higher Bacteroidetes and lower Firmicutes abundance in the isoflavone group, along with increased microbiota diversity. Gene sets related to TNF-α signaling via NF-κB and unfolded protein response were negatively associated with isoflavones. Conclusions: Isoflavone intake alters gut microbiota and increases muscle strength, suggesting a potential role in improving sarcopenia in menopausal women.
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MDPI and ACS Style
Kawai, S.; Okamura, T.; Munekawa, C.; Hasegawa, Y.; Kobayashi, A.; Nakajima, H.; Majima, S.; Nakanishi, N.; Sasano, R.; Hamaguchi, M.;
et al. Effect of Isoflavone on Muscle Atrophy in Ovariectomized Mice. Nutrients 2024, 16, 3295.
https://doi.org/10.3390/nu16193295
AMA Style
Kawai S, Okamura T, Munekawa C, Hasegawa Y, Kobayashi A, Nakajima H, Majima S, Nakanishi N, Sasano R, Hamaguchi M,
et al. Effect of Isoflavone on Muscle Atrophy in Ovariectomized Mice. Nutrients. 2024; 16(19):3295.
https://doi.org/10.3390/nu16193295
Chicago/Turabian Style
Kawai, Sayaka, Takuro Okamura, Chihiro Munekawa, Yuka Hasegawa, Ayaka Kobayashi, Hanako Nakajima, Saori Majima, Naoko Nakanishi, Ryoichi Sasano, Masahide Hamaguchi,
and et al. 2024. "Effect of Isoflavone on Muscle Atrophy in Ovariectomized Mice" Nutrients 16, no. 19: 3295.
https://doi.org/10.3390/nu16193295
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