Zhu et al. 2021 — Lactobacillus plantarum CCFM8610 mitigation of food-derived cadmium forms

Zhu et al. tested whether Lactobacillus plantarum CCFM8610 mitigates acute toxicity from four cadmium forms selected to represent food-derived cadmium chemistry: CdCl2, Cd-citrate, Cd-glutathione, and Cd-metallothionein. This is mitigation and microbiome evidence, not product-occurrence evidence; the spiked mouse-exposure doses must not enter food or supplement benchmark pools.

Key numbers

• Experimental design: 40 SPF male ICR mice, randomly divided into 10 groups with four mice per group.
• Cadmium exposure: CdCl2, Cd-citrate, Cd-glutathione, and Cd-metallothionein were administered by gavage at 50 mg Cd2+/kg body weight.
• Probiotic treatment: L. plantarum CCFM8610 was lyophilized in skim milk and resuspended at 1 x 10^10 CFU/mL; treatment groups received CCFM8610 one hour after cadmium administration.
• Endpoint timing: mice were sacrificed 48 h after oral administration; blood, liver, kidney, and fecal samples were collected.
• Analytical measurement: tissue cadmium was measured by atomic absorption spectrometry after overnight HNO3 digestion and microwave digestion.
• Direction of effect: CCFM8610 markedly inhibited Cd accumulation in liver and kidneys for the CdCl2 and Cd-citrate groups, and the authors reported decreasing trends in tissues and blood for Cd-glutathione and Cd-metallothionein groups.
• Mechanistic endpoints: the study measured malondialdehyde, superoxide dismutase, catalase, hepatic metallothionein, 16S rRNA fecal microbiota composition, and LC-MS/MS serum metabolomics.

Methods (brief)

The study used an acute mouse toxicity model rather than a food survey. Four food-relevant cadmium forms were prepared from earlier protocols, administered by gavage, and followed by CCFM8610 or skim-milk control. Cadmium was quantified in tissues by AAS; oxidative-stress markers, 16S rRNA sequencing, and serum metabolomics were used to characterize biological response.

Limitations: the exposure dose is a toxicology challenge dose, not a consumer-product concentration. The figure text supports the direction of tissue-cadmium reduction but the extracted PDF text does not expose the plotted tissue concentrations as numeric table values.

Implications

Certification: Do not use this paper for occurrence thresholds in supplements, probiotics, food, or ingredients. Its value is as mitigation evidence that probiotic organisms may reduce cadmium retention after exposure to multiple food-derived cadmium species.

Courses: Useful for explaining why total cadmium concentration alone does not describe biological response; Cd-ligand form and gut-microbiome mitigation both matter.

App: No direct app concentration value. This can support future explanatory content about mitigation mechanisms, not product scoring.

Microbiome: Directly relevant to cadmium-gut-microbiome interactions because the authors used fecal 16S rRNA sequencing and metabolomics to connect probiotic treatment with cadmium-toxicity mitigation.

Wiki pages this source may touch

• cadmium
• remediation-evidence
• formulation

Verification notes

• DOI, title, authors, year, journal, license, and methods were transcribed from the PDF first pages and methods section.
• The source reports food-derived cadmium forms, but the measurements are in a mouse challenge model. Products and ingredients are intentionally empty to prevent spiked-dose data from entering occurrence pools.

Page history

The five most recent substantive edits to this page. The full version history lives in git; when DOI minting comes online (see schema docs), each entry below will also link to a version-pinned DataCite DOI.