The population of the obese is increasing worldwide. Prevention and improvement of obesity are indispensable for decreasing the risk of metabolic disorders. We have recently shown that obesity and fatty liver are reduced by a plant-derived lactic acid bacterium, Pediococcus pentosaceus LP28 (LP28), in high-fat diet-induced obese mice. The aim of the present clinical study is to prove that LP28 is effective for reducing body fat and body weight, as shown in the experiment using mice.
The clinical trial was carried out as a double-blind, randomized, placebo-controlled study comprising 62 subjects (20–70 years of age, BMI 25–30 kg/m2). These subjects were randomly assigned to three groups that received living LP28, heat-killed LP28 or a placebo powder, administered orally once a day for 12 weeks.
Heat-killed LP28 reduced BMI (0.45 kg/m2, 95% CI (0.04, 0.86), P=0.035), body fat percentage (1.11%, (0.39, 1.82), P=0.002), body fat mass (1.17 kg (0.43, 1.92), P=0.004) and waist circumference (2.84 cm (0.74, 4.93), P=0.009) when compared with a placebo group. Fasting plasma glucose, HbA1c, fasting insulin, HOMA-IR and serum lipids levels did not change by either living LP28 or heat-killed LP28 intake.
Heat-killed LP28 displays an antiobesity effect that reduces BMI, body fat and waist circumference, suggesting that the plant-derived lactic acid bacterium LP28 would be a promising preventive of metabolic syndrome.
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This study was financially supported by Grants-in-Aid for Scientific Research (Kiban C 23617013 to FH) from the Ministry of Education, Culture, Sports, Science and Technology, Japan. We thank Dr Yongxin Shen at the Clinical Research Center for undertaking the random allocation of study subjects. FH and MS designed the research and had primary responsibility for the final content. FH, MN, TA and ND conducted the research. FH was in charge of statistical analysis and prepared the manuscript. YM and TK supported the statistical analysis of the results from the clinical study. All authors read and approved the final manuscript.
Hiroshima University has a patent on the use of LP28 as an antiobesity reagent, and FH, MN and MS are co-inventors on that patent. TA, ND, YM and TK declare no conflicts of interest.
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Higashikawa, F., Noda, M., Awaya, T. et al. Antiobesity effect of Pediococcus pentosaceus LP28 on overweight subjects: a randomized, double-blind, placebo-controlled clinical trial. Eur J Clin Nutr 70, 582–587 (2016). https://doi.org/10.1038/ejcn.2016.17
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