Figure 2 : Effects of Arg administration on putrescine concentration in rodents.

From: Upregulation of colonic luminal polyamines produced by intestinal microbiota delays senescence in mice

Figure 2

(a) Fecal PA concentration after oral administration of Arg in ICR mice (left) and SD rats (right) (n = 8) *p < 0.05, **p < 0.01, ***p < 0.001 (vs. control = 0 mg). (b) Influences of oral administration of antibiotics on PA production due to Arg and effects of ornithine substitution on PA production in ICR mice (n = 8). Data are represented as mean ± SEM. *p < 0.05, **p < 0.01, ***p < 0.001 (vs. Arg 0.6 mg/g body). nt: not tested. (c) Polyamine concentration in the colonic lumen and tissue after oral Arg administration in SD rats (n = 4). (d) Changes of blood PA concentration after oral Arg administration in rats with a jugular catheter (n = 5). *p < 0.05 (vs. pre-administration). (e) Fecal PA concentration after injection of Arg through a proximal colon catheter (n = 5). *p < 0.05, **p < 0.01 (vs. control = 0 mg).