Effect of Mukitake mushroom (Panellus serotinus) on the pathogenesis of lipid abnormalities in obese, diabetic ob/ob mice

Abstract

Background: Various mushrooms have been used in folk medicine for the treatment of lifestyle diseases in eastern countries, and several compounds that modulate the immune system, lower blood lipid levels, and inhibit tumor and viral action have been isolated. The fruiting body of Panellus serotinus (Mukitake) is recognized in Japan as one of the most delicious edible mushrooms, and previous studies have demonstrated that the dietary intake of powdered whole Mukitake or Mukitake extracts prevents the development of non-alcoholic fatty liver disease (NAFLD) in leptin-resistant db/db mice. In the present study, we evaluated the effect of the Mukitake diet on the pathogenesis of metabolic disorders in leptin-deficient ob/ob mice.

Results: After 4 weeks of feeding, hepatomegaly, hepatic lipid accumulation, and elevated hepatic injury markers in the serum were markedly alleviated in Mukitake-fed ob/ob mice compared with control mice. Moreover, the mild hyperlipidemia in control ob/ob mice was attenuated and the elevated atherogenic index was reduced in Mukitake-fed ob/ob mice. These effects were partly attributable to the suppression of hepatic lipogenic enzyme activity due to the Mukitake diet.

Conclusion: The current results showed that Mukitake supplementation is beneficial for the alleviation of NAFLD and dyslipidemia in obese, diabetic ob/ob mice.

Figure 1

Hepatic lipid levels in C57BL/6J and ob/ob mice. Mice were fed the control diet or Mukitake diet for 4 weeks. Values are expressed as the mean ± standard error for six mice. See Table  1 for the composition of diets. ^abc Different superscripted letters indicate a significant difference at P < 0.05.

Figure 2

Hepatic injury marker activities in C57BL/6J and ob/ob mice. Mice were fed the control diet or Mukitake diet for 4 weeks. Values are expressed as the mean ± standard error for six mice. See Table  1 for the composition of diets. ^abc Different superscripted letters indicate a significant difference at P < 0.05.

Figure 3

Activities of hepatic enzymes related to triglyceride metabolism in C57BL/6J and ob/ob mice. Mice were fed the control diet or Mukitake diet for 4 weeks. Values are expressed as the mean ± standard error for six mice. See Table  1 for the composition of diets. ^abc Different superscripted letters indicate a significant difference at P < 0.05.