Preprint Article Version 1 This version is not peer-reviewed

Effects of Tempeh Fermentation with Lactobacillus Plantarum and Rhizopus Oligosporus on Streptozotocin-Induced Type II Diabetes Mellitus in Rats

Version 1 : Received: 28 July 2018 / Approved: 31 July 2018 / Online: 31 July 2018 (09:37:51 CEST)

A peer-reviewed article of this Preprint also exists.

Huang, Y.-C.; Wu, B.-H.; Chu, Y.-L.; Chang, W.-C.; Wu, M.-C. Effects of Tempeh Fermentation with Lactobacillus plantarum and Rhizopus oligosporus on Streptozotocin-Induced Type II Diabetes Mellitus in Rats. Nutrients 2018, 10, 1143. Huang, Y.-C.; Wu, B.-H.; Chu, Y.-L.; Chang, W.-C.; Wu, M.-C. Effects of Tempeh Fermentation with Lactobacillus plantarum and Rhizopus oligosporus on Streptozotocin-Induced Type II Diabetes Mellitus in Rats. Nutrients 2018, 10, 1143.

Journal reference: Nutrients 2018, 10, 1143
DOI: 10.3390/nu10091143

Abstract

The increased consumption of high fat-containing foods has been linked to the prevalence of obesity and abnormal metabolic syndromes. Rhizopus oligosporus, a fungus in the family Mucoraceae, is widely used as a starter for homemade tempeh. Although R. oligosporus can prevent the growth of other microorganisms, it grows well with lactic acid bacteria (LAB). Lactobacillus plantarum can produce β-glucosidase, which catalyzes the hydrolysis of glucoside isoflavones into aglycones (with greater bioavailability). Therefore, the development of a soybean-based functional food by the co-inoculation of R. oligosporus and L. plantarum is a promising approach to increase the bioactivity of tempeh. In this study, the ameliorative effect of L. plantarum in soy tempeh on abnormal carbohydrate metabolism in high-fat diet (HFD)-induced hyperglycemic rats was evaluated. The co-incubation of L. plantarum with R. oligosporus during soy tempeh fermentation reduced the homeostatic model assessment of insulin resistance, HbA1c, serum glucose, total cholesterol, triglyceride, free fatty acid, insulin, and low-density lipoprotein contents and significantly increased the high-density lipoprotein content in HFD rats. It also increased the LAB counts as well as the bile acid, cholesterol, triglyceride, and short-chain fatty acid contents in the feces of HFD rats. Our results suggested that the modulation of serum glucose and lipid levels by LAB occurs via alterations in the internal microbiota, leading to the inhibition of cholesterol synthesis and promotion of lipolysis. Tempeh, produced with both L. plantarum and R. oligosporus, may be a beneficial dietary supplement for individuals with abnormal carbohydrate metabolism.

Subject Areas

tempeh; lactic acid bacteria; short chain fatty acids; metabolic syndrome; high fat diet; feces

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