Influence of supplementation with probiotic bacteria Lactiplantibacillus plantarum and Latilactobacillus curvatus on selected parameters of duodenum iron metabolism in rats on a high-fat, iron-deficient diet

Objectives: A high-fat, iron (Fe)-deficient Western diet induces obesity and dysregulates Fe metabolism. We compared the influence of Lactiplantibacillus plantarum and Latilactobacillus curvatus with and without Fe supplementation on duodenal Fe uptake under high-fat diet conditions.
Methods: Rats were fed a high-fat diet (HF group) or high-fat, Fe-deficient diet (HFDEF group) or control diet (C group) for 8 wk. For the next 8 wk, the rats in the C and HF groups continued on the same diet, whereas the rats in the HFDEF group were divided into six groups and fed high-fat, Fe-deficient diet combinations with L. plantarum (Lp), L. curvatus (Lc), and Fe supplementation (HFDEF, HFDEFFe, HFDEFLp, HFDEFLc, HFDEF FeLp, HFDEFFeLc). Duodenum and serum samples were collected for analysis.
Results: In the duodenum, the Fe content was higher in the HFDEFFeLp and HFDEFFeLc groups; the ferropor tin level was higher in the HFDEFFeLp and HFDEFFeLc groups versus the HF group; the divalent metal trans porter 1 level was higher in the HFDEFFeLc group versus the C and HF groups; and duodenal cytochrome B was higher in the HFDEFLc versus all the other groups. In addition, duodenal expression of the solute carrier family 11 member 2 gene washigher in the HFDEF group versus the C, HF, HFDEFFe, HFDEFFeLp, and HFDEF FeLc groups; that of the TFRC gene was higher in the HFDEFFeLc group versus the C, HF, HFDEF, and HFDEFFe groups; and that of the HJV gene was higher in the HFDEFFeLp group versus the C, HF, HFDEF, HFDEFFe, and HFDEFLc groups.
Conclusions: L. plantarum and L. curvatus supplementation shows some potential to enhance duodenal cellu lar Fe uptake in rats on a high-fat, Fe-deficient diet.