Library Subscription: Guest
Begell Digital Portal Begell Digital Library eBooks Journals References & Proceedings Research Collections
International Journal of Medicinal Mushrooms
IF: 1.423 5-Year IF: 1.525 SJR: 0.431 SNIP: 0.661 CiteScore™: 1.38

ISSN Print: 1521-9437
ISSN Online: 1940-4344

International Journal of Medicinal Mushrooms

DOI: 10.1615/IntJMedMushrooms.v17.i6.50
pages 541-556

Submerged-Culture Mycelia and Broth of the Maitake Medicinal Mushroom Grifola frondosa (Higher Basidiomycetes) Alleviate Type 2 Diabetes-Induced Alterations in Immunocytic Function

Ya-Hui Chen
Department of Medical Education and Research, Changhua Christian Hospital, #135 Nanxiao Street, Changhua City, Changhua County 50006, Taiwan
Chien-Hsing Lee
School of Chinese Medicine, College of Chinese Medicine, China Medical University, Taichung, 40402, Taiwan R.O.C.; Division of Pediatric Surgery, Department of Surgery, China Medical University Children's Hospital, Taichung, 40402, Taiwan R.O.C.
Tai-Hao Hsu
Department of Medicinal Botanicals and Health Applications, Da-Yeh University, Datsuen, Changhua, 51591, Taiwan (R. O. C.); Department of Bioindustry Technology, Da-Yeh University, Datsuen, Changhua, 51591, Taiwan (R. O. C.)
Hui-Chen Lo
Department of Natural Sciences, Fu Jen Catholic University, #510, JhongZheng Rd., Xinzhuang District, New Taipei City, 24205, Taiwan, ROC

ABSTRACT

Type 2 Diabetes mellitus (T2DM), a disease with impaired glucose, protein and lipid metabolism, low-grade chronic inflammation, and immune dysfunction, is a global public health crisis. We previously demonstrated that Grifola frondosa has bioactivities in improving glycemic responses in diabetic rats. Herein, we investigated the immunomodulatory effects of the submerged-culture mycelia and broth of G. frondosa on the peripheral blood cells (PBL) and splenocytes. Male Wistar rats were administered with saline (normal rats) or streptozotocin plus nicotinamide (T2DM rats) and were intragastrically administered with placebo, fermented mycelia, broth, or mycelia plus broth (1 g kg−1 day−1) for two weeks. In normal rats, ingestion of mycelia significantly decreased monocytes and ingestion of mycelia and broth significantly decreased the productions of interferon (IFN)-γ and interleukin (IL)-4 from the PBL and splenocytes. In T2DM rats, ingestion of mycelia, broth, and mycelia plus broth significantly alleviated the increases in 2 h postprandial blood glucose and the productions of IFN-γ from the T-leukocytes, IL-4, and IL-6 from the monocytes and IL-4 from the T-splenocytes, as well as significantly improved the productions of tumor-necrosis factor-α from the macrophages. In conclusion, submerged-culture mycelia and broth of G. frondosa may decrease cell-medicated immunity in normal rats and improve hyperglycemia and diabetes-induced alterations in cell-medicated and innate immunities in T2DM rats.