Various environmental contaminants including heavy metals, pesticides and antibiotics can contaminate food and water, leading to adverse effects on human health, such as inflammation, oxidative stress and intestinal disorder. Therefore, remediation of the toxicity of foodborne contaminants in human has become a primary concern. Some probiotic bacteria, mainly Lactobacilli, have received a great attention due to their ability to reduce the toxicity of several contaminants. For instance, Lactobacilli can reduce the accumulation and toxicity of selective heavy metals and pesticides in animal tissues by inhibiting intestinal absorption of contaminants and enhancing intestinal barrier function. Probiotics have also shown to decrease the risk of antibiotic-associated diarrhea possibly via competing and producing antagonistic compounds against pathogenic bacteria. Furthermore, probiotics can improve immune function by enhancing the gut microbiota mediated anti-inflammation. Thus, these probiotic bacteria are promising candidates for protecting body against foodborne contaminants-induced toxicity. Study on the mechanism of these beneficial bacterial strains during remediation processes and particularly their interaction with host gut microbiota is an active field of research. This review summarizes the current understanding of the remediation mechanisms of some probiotics and the combined effects of probiotics and gut microbiota on remediation of foodborne contaminants in vivo.

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Heavy metal contamination in food endangers human health. Probiotics can protect animals and human against heavy metals, but the detoxification mechanism has not been fully clarified. Here, mice were supplemented with Pediococcus acidilactici strain BT36 isolated from Tibetan plateau yogurt, with strong antioxidant activity but no chromate reduction ability for 20 days to ensure gut colonization. Strain BT36 decreased chromate accumulation, reduced oxidative stress, and attenuated histological damage in the liver of mice. 16S rRNA and metatranscriptome sequencing analysis of fecal microbiota showed that BT36 reversed Cr (VI)-induced changes in gut microbial composition and metabolic activity. Specifically, BT36 recovered the expressions of 788 genes, including 34 inherent Cr remediation-relevant genes. Functional analysis of 10 unannotated genes regulated by BT36 suggested the existence of a new Cr(VI)-reduction gene in the gut microbiota. Thus, BT36 can modulate the gut microbiota in response to Cr(VI) induced oxidative stress and protect against Cr toxicity.

Moringa oleifera (MO) is mostly inhabiting in the tropical and subtropical regions of the world. It is notable for its therapeutic and nutritious qualities on the grounds that each piece of this plant can be exploited for restorative and sustenance purposes. The restorative and healthful qualities are because of the nearness of certain essential and optional metabolites contained by the plant. The phytochemicals screening uncovered the occurrence of auxiliary metabolites. These bioactive mixes can be utilized as a part of curing numerous ailments. MO is a versatile plant whose seeds comprise an excellent consumable oil (up to 40% by weight) and water-solvent protein that acts viable coagulants for water and wastewater treatment. The fruitful utilization of shelled MO Lam. seeds as a biosorbent presents a more affordable ecologically inviting technique for the expulsion of different irresistible metals from contaminated watery media. Aside from turbidity expulsion, MO, additionally, has antibacterial properties. The aim of this review is to present a complete analysis of the traditional uses and pharmacological properties of MO. Furthermore, this review is to update wide numbers of phytochemical constituents which have been isolated from the plant, and these constituents possess several medicinal properties.

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