title: Functional properties of peanut fractions on the growth of probiotics and foodborne bacterial pathogens.
abstract: Various compounds found in peanut (Arachis hypogaea) have been shown to provide multiple benefits to human health and may influence the growth of a broad range of gut bacteria. In this study, we investigated the effects of peanut white kernel and peanut skin on 3 strains of Lactobacillus and 3 major foodborne enteric bacterial pathogens. Significant (P < 0.05) growth stimulation of Lactobacillus casei and Lactobacillus rhamnosus was observed in the presence of 0.5% peanut flour (PF) made from peanut white kernel, whereas 0.5% peanut skin extract (PSE) exerted the inhibitory effect on the growth of these beneficial microbes. We also found that within 72 h, PF inhibited growth of enterohemorrhagic Escherichia coli O157:H7 (EHEC), while PSE significantly (P < 0.05) inhibited Listeria monocytogenes but promoted the growth of both EHEC and Salmonella Typhimurium. The cell adhesion and invasion abilities of 3 pathogens to the host cells were also significantly (P < 0.05) reduced by 0.5% PF and 0.5% PSE. These results suggest that peanut white kernel might assist in improving human gut flora as well as reducing EHEC, whereas the beneficial effects of peanut skins require further research and investigation.
authors: Dept. of Molecular and Cellular Biology, Univ. of Maryland, College Park, MD 20742, U.S.A.
authors: Mengfei
authors: M
authors: Peng
authors: Elizabeth
authors: E
authors: Bitsko
authors: Debabrata
authors: D
authors: Biswas
mesh_terms: D000890:Anti-Infective Agents / Q000494:pharmacology*; D010367:Arachis; D001419:Bacteria / Q000187:drug effects* / Q000254:growth & development; D001422:Bacterial Adhesion; D002460:Cell Line; D019453:Escherichia coli O157 / Q000187:drug effects / Q000254:growth & development; D005517:Foodborne Diseases / Q000382:microbiology*; D006801:Humans; D007422:Intestines / Q000382:microbiology; D007778:Lactobacillus / Q000187:drug effects / Q000254:growth & development; D008089:Listeria monocytogenes / Q000187:drug effects / Q000254:growth & development; D028321:Plant Preparations / Q000494:pharmacology*; D056692:Prebiotics; D019936:Probiotics; D012486:Salmonella typhimurium / Q000187:drug effects / Q000254:growth & development; D012639:Seeds
chemical_list: D000890:Anti-Infective Agents; D028321:Plant Preparations; D056692:Prebiotics
keywords: foodborne bacterial pathogen; pathogen-cell interaction; peanut flour; peanut skin; probiotic