Inclusion of Lacticaseibacillus paracasei NSMJ15 in broiler diets induces changes in jejunal immune cell population and cecal microbiota.
Study Goal
The researchers aimed to investigate the effects of dietary Lacticaseibacillus paracasei NSMJ15 on growth performance, immune response, gut microbiota, and short-chain fatty acid profiles in broiler chickens.
Results Summary
L. paracasei NSMJ15 did not affect growth performance or antioxidant enzyme activity but increased CD4+ T cells and decreased acetate concentration in cecal digesta, while altering specific microbial genera.
Population
1-day-old Ross 308 male broiler chickens
Effective Dosage
1 g/kg of diet
Duration
10 days
Interactions
None mentioned
| Intervention | Direction | Endpoint | Population | Dosage | Impact | Claim # |
|---|---|---|---|---|---|---|
diet containing Lacticaseibacillus paracasei NSMJ15 | no change | growth performance | broiler chickens | - | did not affect | #1 |
diet containing Lacticaseibacillus paracasei NSMJ15 | no change | serum antioxidant enzyme activity | broiler chickens | - | did not affect | #2 |
diet containing Lacticaseibacillus paracasei NSMJ15 | no change | jejunal histomorphology | broiler chickens | - | did not affect | #3 |
L. paracasei NSMJ15 supplementation | increase | population of CD3+CD4+CD8- T cells | broiler chickens | - | increased | #4 |
L. paracasei NSMJ15 supplementation | decrease | population of CD3+CD8+TCRγδ+ T cells | broiler chickens | - | decreased | #5 |
L. paracasei NSMJ15 supplementation | decrease | acetate concentration in the cecal digesta | broiler chickens | - | decreased | #6 |
L. paracasei NSMJ15 supplementation | increase | 10 more amplicon sequence variants | broiler chickens | 10 more | differentially expressed | #7 |
L. paracasei NSMJ15 supplementation | no change | alpha and beta diversity indices of the cecal microbiota | broiler chickens | - | did not affect | #8 |
Genera Mediterraneibacter and Negativibacillus | increase | CD4+ T cells | broiler chickens | - | positively correlated | #9 |
genera Gemmiger, Coprococcus, Sellimonas, Massilimicrobiota, and Blautia | decrease | SCFA concentration | broiler chickens | - | negatively correlated | #10 |
OBJECTIVE: The objective was to investigate growth performance, antioxidant enzyme activity, intestinal morphology, immune cell distribution, short chain fatty acid (SCFA) profile, and microbiota in broiler chickens fed a diet containing Lacticaseibacillus paracasei NSMJ15. METHODS: A total of 120 1-day-old Ross 308 male broilers were allocated to 2 dietary treatments in a randomized complete block design. A control group was fed a corn-soybean meal control diet, and an NSMJ15-supplemented group was fed a control diet supplemented with 1 g/kg L. paracasei NSMJ15 at the expense of cornstarch. Each dietary treatment had 6 replicates with 10 birds per cage. Growth performance was recorded on day 9. On day 10, one bird representing median body weight was selected to collect serum for antioxidant enzyme activity, jejunal tissue for immune cell isolation and morphometric analysis, and cecal digesta for 16S rRNA gene sequencing and SCFA analysis. RESULTS: Supplementation of L. paracasei NSMJ15 did not affect growth performance, serum antioxidant enzyme activity, and jejunal histomorphology compared to the control group. In the NSMJ15-supplemented group, the population of CD3+CD4+CD8- T cells increased (p = 0.010), while the population of CD3+CD8+TCRγδ+ T cells decreased (p = 0.022) compared to the control group. The L. paracasei NSMJ15 supplementation decreased (p = 0.022) acetate concentration in the cecal digesta compared to the control group. The 16S rRNA gene sequencing analysis showed that NSMJ15-supplemented group differentially expressed (p<0.05) 10 more amplicon sequence variants compared to control group without affecting alpha and beta diversity indices of the cecal microbiota. Genera Mediterraneibacter and Negativibacillus were positively (p<0.05) correlated with CD4+ T cells, while genera Gemmiger, Coprococcus, Sellimonas, Massilimicrobiota, and Blautia were negatively (p<0.05) correlated with SCFA concentration. CONCLUSION: The results of the present study suggest dietary L. paracasei NSMJ15 supplementation may increase percentage of CD4+ T cells and decrease acetate concentration in broiler chickens by increasing the differential expression of specific microbial genera.