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. 2022 Feb 4;9:804210. doi: 10.3389/fnut.2022.804210

Figure 1.

Figure 1

Heat-killed probiotics reduced IL-6 and NO levels through LPS stimulation in mouse RAW 264.7 macrophages. An appropriate number of cells were seeded in a 24-well plate. Probiotics (L. reuteri, L. rhamnosus, L. salivarius, and five strains of L. paracasei) were cultured in MRS broth for 20 h, with the bacterial concentration adjusted through centrifugation. These bacteria were heat killed (90°C for 30 min) and then added to cells with or without LPS stimulation. After 20 h, the culture supernatant was collected for measurement of the IL-6 production (A,B) and NO (C). *P < 0.05, **P < 0.01, and ***P < 0.001 compared with the group treated with LPS alone.