RT Journal Article T1 Safety and immunomodulatory effects of three probiotic strains isolated from the feces of breast-fed infants in healthy adults: SETOPROB study. A1 Plaza-Diaz, Julio A1 Gomez-Llorente, Carolina A1 Campaña-Martin, Laura A1 Matencio, Esther A1 Ortuño, Inmaculada A1 Martínez-Silla, Rosario A1 Gomez-Gallego, Carlos A1 Periago, Maria Jesús A1 Ros, Gaspar A1 Chenoll, Empar A1 Genovés, Salvador A1 Casinos, Beatriz A1 Silva, Angela A1 Corella, Dolores A1 Portolés, Olga A1 Romero, Fernando A1 Ramón, Daniel A1 Perez de la Cruz, Antonio A1 Gil, Angel A1 Fontana, Luis K1 Clostridium difficile K1 Hibridación in Situ K1 ARN Bacteriano K1 Sondas de Oligonucleótidos K1 Bifidobacterium K1 Lactobacillus K1 Microbiota AB We previously described the isolation and characterization of three probiotic strains from the feces of exclusively breast-fed newborn infants: Lactobacillus paracasei CNCM I-4034, Bifidobacterium breve CNCM I-4035 and Lactobacillus rhamnosus CNCM I-4036. These strains were shown to adhere to intestinal mucus in vitro, to be sensitive to antibiotics and to resist biliary salts and low pH. In the present study, a multicenter, randomized, double-blind, placebo-controlled trial with 100 healthy volunteers in three Spanish cities was carried out to evaluate the tolerance, safety, gut colonization and immunomodulatory effects of these three probiotics. Volunteers underwent a 15-day washout period, after which they were randomly divided into 5 groups that received daily a placebo, a capsule containing one of the 3 strains or a capsule containing a mixture of two strains for 30 days. The intervention was followed by another 15-day washout period. Patients did not consume fermented milk for the entire duration of the study. Gastrointestinal symptoms, defecation frequency and stool consistency were not altered by probiotic intake. No relevant changes in blood and serum, as well as no adverse events occurred during or after treatment. Probiotic administration slightly modified bacterial populations in the volunteers' feces. Intestinal persistence occurred in volunteers who received L. rhamnosus CNCM I-4036. Administration of B. breve CNCM I-4035 resulted in a significant increase in fecal secretory IgA content. IL-4 and IL-10 increased, whereas IL-12 decreased in the serum of volunteers treated with any of the three strains. These results demonstrate that the consumption of these three bacterial strains was safe and exerted varying degrees of immunomodulatory effects. PB Public Library of Science YR 2013 FD 2013-10-28 LK http://hdl.handle.net/10668/1645 UL http://hdl.handle.net/10668/1645 LA en NO Plaza-Diaz J, Gomez-Llorente C, Campaña-Martin L, Matencio E, Ortuño I, Martínez-Silla R, et al. Safety and immunomodulatory effects of three probiotic strains isolated from the feces of breast-fed infants in healthy adults: SETOPROB study. PLoS ONE. 2013,;8(10):e78111 NO Trial Registration: ClinicalTrials.gov NCT01479543 DS RISalud RD Apr 11, 2025