scholarly journals Effects of Dietary Taurine Supplementation to Gilts during Late Gestation and Lactation on Offspring Growth and Oxidative Stress

Animals ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 220 ◽  
Author(s):  
Mengmeng Xu ◽  
Long Che ◽  
Kaiguo Gao ◽  
Li Wang ◽  
Xuefen Yang ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Protein Expression ◽  
Growth Performance ◽  
Barrier Function ◽  
Average Daily Gain ◽  
Basal Diet ◽  
Intestinal Morphology ◽  
Late Gestation ◽  
Villus Height ◽  
And Oxidative Stress

Birth is one of the most important events of animal production agriculture, as newborns are abruptly forced to adapt to environmental and nutritional disruptions that can lead to oxidative damage and delay in growth. Taurine (Tau) is an important regulator of oxidative stress and possesses growth-enhancing properties. In the present study, we investigated the effects of dietary Tau supplementation in gilts during late gestation and lactation on the growth performance of piglets by assessing intestinal morphology and barrier function, and oxidative stress status. Sixteen gilts were randomly allocated to the Con (basal diet) and Tau (basal diet with 1% Tau) groups from 75 d of gestation to weaning. Maternal dietary Tau supplementation significantly increased weaning weight and average daily gain weight in piglets. Piglets in the Tau group had higher villus height and villus height-to-crypt depth ratio (VCR), ZO-1 protein expression, and secretory immunoglobulin A (sIgA) content in the jejunum. Meanwhile, Tau bebeficial affected the milk quality of gilts, as indicated by decreased malondialdehyde (MDA) concentration and increased total superoxide dismutase (T-SOD), total antioxidative capability (T-AOC), glutathione peroxidase (GPx), and catalase (CAT) activity. Furthermore, Tau supplementation increased T-SOD activity in plasma and SOD2 protein expression in the jejunum in the piglets. In conclusion, this study provides evidence that dietary Tau supplementation to gilts improves growth performance in piglets, owing to improved intestinal morphology and barrier function, as well as inhibition of oxidative stress.

scholarly journals Effects of Dietary β-Mannanase Supplementation on Growth Performance, Apparent Total Tract Digestibility, Intestinal Integrity, and Immune Responses in Weaning Pigs

Animals ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 703
Author(s):  
Jae-Cheol Jang ◽  
Kwang Kim ◽  
Young Jang ◽  
Yoo Kim
Keyword(s):  
Oxidative Stress ◽  
Body Weight ◽  
Growth Performance ◽  
Basal Diet ◽  
Villus Height ◽  
Crypt Depth ◽  
Intestinal Integrity ◽  
Weaning Pigs ◽  
Dietary Treatments ◽  
And Oxidative Stress

The experiment aimed to investigate the effects of dietary β-mannanase supplementation on growth performance, apparent total tract digestibility (ATTD) of nutrients, intestinal integrity, and the immunological and oxidative stress parameters in weaning pigs. A total of 64 newly weaning pigs (initial body weight: 6.96 ± 0.70 kg) were allotted to two dietary treatments in eight replicates per treatment with four pigs per pen based on body weight and sex. Dietary treatments were 1.) CON (control: corn-soybean meal based basal diet) and 2.) β-mannanase (basal diet +0.06% β-mannanase). The β-mannanase supplementation did not affect growth performance, concentrations of acute phase protein, superoxide dismutase and glutathione peroxidase. However, the pigs fed the β-mannanase-supplemented diet had greater ATTD of ether extract, jejunum villus height, and villus height-to-crypt depth ratio, and lower crypt depth compared with those fed the CON diet (p < 0.05). The pigs fed the β-mannanase-supplemented diet tended to have the lower count of E. coli in cecum than those fed the CON diet (p = 0.08). In conclusion, dietary β-mannanase supplementation did not affect growth performance, immune response and oxidative stress of weaning pigs, whereas it increased fat digestibility and had positive effects on intestinal integrity and cecum microflora by reducing the count of E.coli.

Effects of Glutamine on Growth Performance, Intestinal Morphology and Intestinal Barrier Function of Broilers

2020 ◽  
Author(s):  
Q. J. Wu ◽  
Z. H. Liu ◽  
C. Jiao ◽  
B. Y. Cheng ◽  
D. D. Zhu ◽  
...  
Keyword(s):  
Growth Performance ◽  
Feed Intake ◽  
Barrier Function ◽  
Average Daily Gain ◽  
Intestinal Barrier ◽  
Intestinal Morphology ◽  
Intestinal Barrier Function ◽  
Villus Height ◽  
Crypt Depth ◽  
Daily Gain

The effect of glutamine (Gln) on growth performance, intestinal morphology and intestinal barrier function were evaluated in broilers. A total of 320 birds were divided into a control group (CON) and three experimental groups (Gln 1, Gln 2 and Gln 3). Broilers of group CON received basal diet; broilers in group Gln 1, Gln 2 and Gln 3 were supplemented with 0.5%, 1.0% and 1.5 % Gln, respectively, for 42 days. The results indicated that Gln has no influence on the average daily gain (ADG) among the treatments in the periods of 1 to 21 d, 22 to 42 d and 1 to 42 d (P > 0.05). However, Gln improved average daily feed intake (ADFI) and feed intake: average daily gain (F: G), increased the villus height, villus height to crypt depth ratio (V/C) and the activities of sucrose, the ZO1, claudin-1 and occluding mRNA expression levels (P 0.05). Moreover, Gln decreased the crypt depth of jejunum and ileum in broilers at days 21 and 42 (P 0.05). In conclusion, Gln had a positive effect on growth performance and gut parameters by modifying the function of the intestinal mucosa barrier.

scholarly journals Dietary Chitooligosaccharide Inclusion as an Alternative to Antibiotics Improves Intestinal Morphology, Barrier Function, Antioxidant Capacity, and Immunity of Broilers at Early Age

Animals ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 493 ◽  
Author(s):  
Jun Li ◽  
Yefei Cheng ◽  
Yueping Chen ◽  
Hengman Qu ◽  
Yurui Zhao ◽  
...  
Keyword(s):  
Antioxidant Capacity ◽  
Growth Performance ◽  
Barrier Function ◽  
Basal Diet ◽  
Immunoglobulin M ◽  
Intestinal Morphology ◽  
Control Group ◽  
Villus Height ◽  
Crypt Depth ◽  
Antibiotic Group

This study aimed to investigate the effects of chitooligosaccharide (COS) inclusion as an alternative to antibiotics on growth performance, intestinal morphology, barrier function, antioxidant capacity, and immunity in broilers. In total, 144 one-day-old Arbor Acres broiler chicks were randomly assigned into 3 groups and fed a basal diet free from antibiotics (control group) or the same basal diet further supplemented with either chlortetracycline (antibiotic group) or COS, for 21 days. Compared with the control group, inclusion of COS reduced the feed to gain ratio, the jejunal crypt depth, the plasma diamine oxidase activity, and the endotoxin concentration, as well as jejunal and ileal malondialdehyde contents, whereas increased duodenal villus height, duodenal and jejunal ratio of villus height to crypt depth, intestinal immunoglobulin G, and jejunal immunoglobulin M (IgM) contents were observed, with the values of these parameters being similar or better to that of the antibiotic group. Additionally, supplementation with COS enhanced the superoxide dismutase activity and IgM content of the duodenum and up-regulated the mRNA level of claudin three in the jejunum and ileum, when compared with the control and antibiotic groups. In conclusion, dietary COS inclusion (30 mg/kg), as an alternative to antibiotics, exerts beneficial effects on growth performance, intestinal morphology, barrier function, antioxidant capacity, and immunity in broilers.

scholarly journals Dietary Supplementation With Didancao (Elephantopus scaber L.) Improves Meat Quality and Intestinal Development in Jiaji Ducks

2021 ◽  
Vol 8 ◽  
Author(s):  
Chengjun Hu ◽  
Lihong Gu ◽  
Mao Li ◽  
Fengjie Ji ◽  
Weiping Sun ◽  
...  
Keyword(s):  
Growth Performance ◽  
Meat Quality ◽  
Dietary Supplementation ◽  
Basal Diet ◽  
Intestinal Morphology ◽  
Intestinal Development ◽  
Microbiota Composition ◽  
Villus Height ◽  
Crypt Depth ◽  
Elephantopus Scaber

Didancao (Elephantopus scaber L.) has been used as a traditional herbal medicine and has exhibited a beneficial role in animal health. This study aimed to investigate the effects of dietary supplementation with E. scaber on growth performance, meat quality, intestinal morphology, and microbiota composition in ducks. A total of 480 Jiaji ducks (42 days old, male:female ratio = 1:1) were randomly assigned to one of four treatments. There were six replicates per treatment, with 20 ducks per replicate. The ducks in the control group (Con) were fed a basal diet; the three experimental groups were fed a basal diet supplementation with 30 (T1), 80 (T2), and 130 mg/kg (T3) of E. scaber. After a 48-day period of supplementation, growth performance, meat quality, intestinal morphology, and microbiota composition were evaluated. The results showed that no differences were observed in the final body weight, average daily feed intake, and average daily gain among the four groups. Compared with that in the Con group, the feed conversion in the T1 and T2 groups was increased significantly; the T2 group was shown to decrease the concentration of alanine aminotransferase in serum; the T3 group was lower than the Con group in the concentration of aspartate aminotransferase and was higher than the Con group in the concentration of high-density lipoprotein-cholesterol. The highest concentration of creatinine was observed in the T1 group. The T2 group was higher than the Con group in the contents of Phe, Ala, Gly, Glu, Arg, Lys, Tyr, Leu, Ser, Thr, Asp, and total amino acids in the breast muscle. Moreover, the T2 group was higher than the Con group in the contents of meat C18:2n−6 and polyunsaturated fatty acid. The concentration of inosinic acid in the T1, T2, and T3 groups was significantly higher than that in the Con group. However, the Con group was higher than the T2 or T3 group in the Zn content. The T2 group was lower than the Con group in the jejunal crypt depth. The T3 group was higher than the Con group in the ileal villus height and the ratio of villus height to crypt depth. In addition, the T3 group had a trend to significantly increase the abundance of Fusobacteria. Compared with the Con group, the T1 and T2 groups displayed a higher abundance of Subdoligranulum. Collectively, dietary supplementation with 80 mg/kg of E. scaber improves meat quality and intestinal development in ducks.

scholarly journals Eucommia Ulmoides Flavones as Antibiotic Alternatives in a Low-protein Diet Improve Growth Performance and Intestinal Health in Weaning Piglets

2020 ◽  
Author(s):  
Daixiu Yuan ◽  
Jing Wang ◽  
Dingfu Xiao ◽  
Jiefeng Li ◽  
Yanhong Liu ◽  
...  
Keyword(s):  
Growth Performance ◽  
Average Daily Gain ◽  
Basal Diet ◽  
The Body ◽  
Intestinal Morphology ◽  
Coliform Bacteria ◽  
Eucommia Ulmoides ◽  
Intestinal Health ◽  
Low Protein ◽  
Weanling Piglets

Abstract Background Eucommia ulmoides flavones (EUF), have been demonstrated to attenuate the inflammation and oxidative stress of piglets. This study was designed to test whether EUF could be as an antibiotic alternative to support growth performance and maintain intestinal health in weanling-piglets. Weaned-piglets (n = 480) were assigned into 3 groups and fed with a low-protein basal diet (NC), or supplementation with antibiotics (PC) or 0.1‰ EUF (EUF). Blood, intestinal contents and intestine were collected on d-15 and d-35, respectively. Results The results showed that the body weight on d-35, average daily gain and gain : feed from d 15 to d 35 and d 0 to d 35 in piglets of PC and EUF treatments were higher than (p < 0.05) these in NC treatment, whereas PC and EUF treatments decreased (p < 0.05) the diarrhea index of weanling piglets. Dietary supplementation of EUF significantly enhanced (p < 0.05) the serum concentrations of total protein, alanine transaminase and the immunoglobulin G on d-15 of piglets compared to piglets in NC treatment. EUF supplementation increased (p < 0.05) the jejunal and ileal villus height and the population of ileal lactic acid bacteria on d-15 but remarkable decreased (p < 0.05) the population of ileal coliform bacteria on d-15 and d-35. Conclusion These findings indicated the antibiotic alternative capacity of EUF in piglets exhibiting by improving growth performance and intestinal morphology, decreasing colonization of coliform bacteria and diarrhea index in weanling piglets.

scholarly journals Effects of dietary Lasia spinosa Thw. powder supplementation on growth performance, blood metabolites, antioxidant status, intestinal morphology, and cecal microbiome in Chinese yellow-feathered broilers

2021 ◽  
Author(s):  
Hong Yongxing ◽  
Zhang Lang ◽  
Tian Kui ◽  
Sun Haodong ◽  
Liu Xingting ◽  
...  
Keyword(s):  
Gut Microbiota ◽  
Growth Performance ◽  
Antioxidant Status ◽  
Basal Diet ◽  
Intestinal Morphology ◽  
Breast Muscle ◽  
Blood Metabolites ◽  
Villus Height ◽  
Crypt Depth ◽  
Group A

Abstract Background: Lasia spinosa Thw. (LST) has been proven to be nutritious and have growth-promoting, antioxidant functions and so on, but its effect in chicken is still unclear. This study aimed to evaluate the effects of dietary LST powder supplementation on growth performance, blood metabolites, antioxidant status, intestinal morphology and cecal microbiome in Chinese yellow-feathered broilers.Methods: A total of 400 one-day-old yellow-feather broilers were randomly allotted to 4 dietary treatments: LST0 group (a basal diet), LST1 group (a basal diet with 1% LST powder), LST2 group (a basal diet with 2% LST powder), LST4 group (a basal diet with 4% LST powder), ten replicates for each treatment and 10 broilers in each treatment group. Results: Results indicated that the average daily feed intake of broilers during 22-42d and the average daily gain of chickens over all periods were significantly increased by dietary supplementation of LST powder compared to a control group, while the feed conversion ratio during the overall periods was markedly decreased. The levels of SOD, CAT and GSH-Px in serum, liver and breast muscle were also significantly increased in LST supplemented groups, while ROS and MDA in serum, liver and breast muscle were decreased. Furthermore, the levels of TG and LDL-C were significantly decreased by the addition of dietary LST powder, while levels of HDL-C, Ca, Fe, Mg and P were linearly increased. Regarding the gut morphometric, crypt depth was significantly decreased by LST supplementation, while villus height and the ratio of villus height to crypt depth were notably increased. Sequencing of 16S rRNA from the cecal contents of broilers revealed that the composition of the chicken gut microbiota was altered by LST supplementation. Moreover, the diversity of microbiota in broilers was increased in the LST1 groups but was decreased in the LST2 and LST4 groups compared with LST0 groups. The differential genera enriched in LST1 groups, such as Bacillus, Odoribacter, Sutterella, Anaerofilum, Peptococcus, were closely related to the increased growth performance, antioxidant status, intestinal morphology, Ca, Mg and reduced blood lipid in the treated broilers. Conclusions: The supplementation of LST powder to the diets of Chinese yellow-feathered broilers improved growth performance, lipid profile, antioxidant indices, intestinal morphology and gut microbiota balance, with its optimum level in yellow-feathered broilers’ diet being 1%.

scholarly journals Effects of Dietary Bacillus and Non-starch Polysaccharase on the Intestinal Microbiota and the Associated Changes on the Growth Performance, Intestinal Morphology, and Serum Antioxidant Profiles in Ducks

2021 ◽  
Vol 12 ◽  
Author(s):  
Simin Peng ◽  
Xin Wang ◽  
Yuyu Wang ◽  
Tuo Lv ◽  
Haohan Zhao ◽  
...  
Keyword(s):  
Growth Performance ◽  
Early Stage ◽  
Average Daily Gain ◽  
Basal Diet ◽  
Diversity Indices ◽  
Intestinal Morphology ◽  
Control Group ◽  
Enzyme Preparations ◽  
Group I ◽  
Similar Body

Given the desirable results of using probiotics and enzyme preparations as feed supplements in poultry health, here, the effects of Bacillus and Non-starch Polysaccharase (NSPase) on the growth performance, serum antioxidant profiles, and gut microbial communities of early stage ducks is investigated. A total of 400 Zhijiang ducks (of similar body weight and 1 day age) was selected and randomly divided into four groups. The feeding period was 28 days. Each group contained 10 replicates of 10 birds. Control group (I) was fed with basal diet, while treatment groups II to IV were fed, respectively, with 150 mg/kg NSPases, 25 mg/kg Bacillus probiotics, and 150 mg/kg NSPases + 25 mg/kg Bacillus probiotics in their basal diet. The results demonstrated that dietary Bacillus (25 mg/kg) increased average final weight, average daily gain (ADG), and decreased the malonaldehyde (MDA) in birds (P &lt; 0.05). Dietary Bacillus (25 mg/kg) and NSPases + Bacillus (150 mg/kg + 25 mg/kg) presented much higher glutathione (GSH) and activities of superoxide dismutase (SOD) in birds (P &lt; 0.05). Additionally, as revealed by β-diversity indices and analysis of similarities, dietary NSPases + Bacillus could affect the ileum microbial abundances and diversities at the genera level (P &lt; 0.05), but it had no effect on the caecal microbiota. Also, 16S rRNA sequencing revealed that dietary Bacillus and NSPases + Bacillus increased the populations of Ruminococcaceae genera in the cecum (P &lt; 0.05), and S24-7_group and Lactobacillus genera in the ileum (P &lt; 0.05). However, dietary NSPases and Bacillus alone and in combination could significantly decrease the content of Bacteroides in the ileum (P &lt; 0.05). According to Spearman correlation analysis, 7 ilea bacterial microbiomes (S24-7 group, Lactobacillus, Subgroup 2, Subgroup 1, Kitasatospora, Candidatus Solibacter, and Akkermansia) were positively correlated with SOD (P &lt; 0.05). In conclusion, Bacillus (25 mg/kg) and NSPases (150 mg/kg) included in the diet could efficiently enhance the growth performance by altered gut microbiota composition at the genera level and antioxidant indices of ducks.

scholarly journals Effects of Plotytarya strohilacea Sieb. et Zuce Tannin on the Growth Performance, Oxidation Resistance, Intestinal Morphology and Cecal Microbial Composition of Broilers

2022 ◽  
Vol 8 ◽  
Author(s):  
Zhenkai Tong ◽  
Fuhong Lei ◽  
Lixuan Liu ◽  
Fei Wang ◽  
Aiwei Guo
Keyword(s):  
Growth Performance ◽  
Basal Diet ◽  
Intestinal Morphology ◽  
Control Group ◽  
Villus Height ◽  
Microbial Composition ◽  
Antioxidant Function ◽  
Total Antioxidant ◽  
Quadratic Relationship ◽  
Addition Amount

The purpose of this experiment was to study the effects of Plotytarya strohilacea Sieb. et Zuce tannin on broilers growth performance, antioxidant function, intestinal development, intestinal morphology and the cecal microbial composition. In this experiment, a total of 360 1-day-old Arbor Acres male broilers were randomly divided into 4 treatment groups, with 6 replicates in each group and 15 broilers in each replicate. The control group (Control) was fed the basal diet, and the broilers were fed a basal diet supplemented with 0 (Control), 100 (PT1), 400 (PT2), and 800 (PT3) mg/kg Plotytarya strohilacea Sieb. et Zuce tannins for 42 days, respectively. The results showed that the average daily feed intake (ADFI) of the PT1 group was significantly lower than that of the control group, and there was a significant quadratic relationship between the ADFI and the concentration of tannin (P &lt; 0.05). Compared with the control group, the F/G of broilers during the 22–42 days phase in the PT1 group showed a decreasing trend (P = 0.063). The serum catalase (CAT) activity in the PT1 group was significantly higher than those of the other three groups, and the effect was significantly quadratically related to the dosage (P &lt; 0.05). The glutathione peroxidase (GSH-Px) activity in the PT1, PT2 and control groups were significantly higher than that of the PT3 group, and the effect was significantly quadratically related to the addition amount (P &lt; 0.05). The serum total antioxidant capacity (T-AOC) activity in the PT1 group was significantly higher than that in the control group, and the effect was significantly quadratically related to the addition amount (P &lt; 0.05). Compared to the control group, the villus height of jejunum in the PT1, PT2 and PT3 groups were significantly higher, and there was a significant quadratic relationship between the villus height of jejunum and the addition amount (P &lt; 0.05). In addition, adding tannins to diets significantly increased Parabacteroides in the dominant genus (P &lt; 0.05). In conclusion, dietary supplementation with Plotytarya strohilacea Sieb. et Zuce tannin improved the growth performance, antioxidant function, and intestinal morphology along with an increased abundance of Parabacteroides in the cecum, and the recommended dosage of tannin in broiler diets was 100 mg/kg.

scholarly journals Algae-Derived Polysaccharides Promote Growth Performance by Improving Antioxidant Capacity and Intestinal Barrier Function in Broiler Chickens

2020 ◽  
Vol 7 ◽  
Author(s):  
Wen-Chao Liu ◽  
Yan Guo ◽  
Zhi-Hui Zhao ◽  
Rajesh Jha ◽  
Balamuralikrishnan Balasubramanian
Keyword(s):  
Antioxidant Capacity ◽  
Growth Performance ◽  
Average Daily Gain ◽  
Intestinal Morphology ◽  
Intestinal Barrier Function ◽  
Control Group ◽  
Gut Health ◽  
Feed Conversion ◽  
Villus Height ◽  
Final Body Weight

This study aimed to determine the efficacy of dietary algae-derived polysaccharides (ADPs) from Enteromorpha on growth performance, intestinal morphology, intestinal permeability, and antioxidant capacity in serum, liver, and intestinal mucosa of broilers. Three hundred and ninety six day-old male chicks were randomly assigned to six dietary treatments containing 0 (Control), 1,000, 2,500, 4,000, 5,500, and 7,000 mg ADP/kg basal diet in a 35 day feeding trial. During day 1–21, compared with the control group, dietary 1,000–7,000 mg/kg ADP supplementation improved the average daily gain (ADG) and feed conversion ratio (p &lt; 0.05). Overall (day 1–35), dietary inclusion of 1,000 mg/kg ADP increased the final body weight and ADG (p &lt; 0.05). Besides, on day 21, dietary 2,500 mg/kg ADP supplementation increased the serum catalase (CAT) and liver total superoxide dismutase (T-SOD) activities (p &lt; 0.05), whereas dietary 1,000–5,500 mg/kg ADP supplementation decreased malondialdehyde (MDA) contents in serum and liver (p &lt; 0.05). On day 35, supplementation of 1,000 mg/kg ADP increased the serum glutathione peroxidase and CAT activities and liver T-SOD activities (p &lt; 0.05). It decreased the MDA level of serum and liver (p &lt; 0.05). Also, dietary 2,500 mg/kg ADP increased the villus height of jejunum and ileum on day 21 (p &lt; 0.05), and dietary 4,000 mg/kg ADP increased the villus height of duodenum and ileum on day 35 (p &lt; 0.05). On day 21, dietary 4,000 mg/kg ADP increased the CAT activities of the duodenum and T-SOD activities of jejunum and ileum and decreased the MDA contents in the duodenum, jejunum, and ileum (p &lt; 0.05). On day 35, dietary inclusion of 1,000–7,000 mg/kg ADP reduced MDA contents of duodenum and jejunum (p &lt; 0.05). Furthermore, dietary inclusion of ADP at 1,000–7,000 mg/kg decreased serum DAO activities at day 21 and day 35 (p &lt; 0.05), and the serum D-lactic acid concentration was reduced by dietary supplementation of 1,000, 2,500, and 7,000 mg/kg ADP on day 21. In conclusion, dietary ADP exerted beneficial effects on growth performance, antioxidant capacity, and gut health in broilers; based on the studied parameters, the appropriate recommended dose is 1,000–4,000 mg/kg. These findings provided new insights into the potential application of ADP as natural growth promoters in broilers.

scholarly journals D-Galactose Induces Chronic Oxidative Stress and Alters Gut Microbiota in Weaned Piglets

2021 ◽  
Vol 12 ◽  
Author(s):  
Hui Han ◽  
Zemin Liu ◽  
Jie Yin ◽  
Jing Gao ◽  
Liuqin He ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Gut Microbiota ◽  
Growth Performance ◽  
Relative Abundance ◽  
Average Daily Gain ◽  
Intestinal Morphology ◽  
Weaned Piglets ◽  
Chronic Oxidative Stress ◽  
Daily Gain ◽  
Different Levels

Oxidative stress commonly occurs in pig production, which can severely damage the intestinal function of weaned piglets. This study was conducted to investigate the effects of D-galactose with different levels used to induce chronic oxidative stress on growth performance, intestinal morphology and gut microbiota in weaned piglets. The results showed that addition of 10 and 20 g/kg BW D-galactose reduced average daily gain and average daily feed intake from the first to the third week. 10 g/kg BW D-galactose increased the concentration of serum MDA at the second and third week. 10 g/kg BW D-galactose significantly influenced the jejunal and ileal expressions of GPx1, CAT1, and MnSOD. The results of 16S rRNA sequencing showed that compared with the control, 10 and 20 g/kg BW D-galactose significantly decreased the relative abundance of Tenericutes, Erysipelotrichia, Erysipelotrichales, and Erysipelotrichaceae, while increased the relative abundance of Negativicutes, Selenomonnadales, and Veillonellaceae. The results indicated that treatment with 10 g/kg BW/day D-galactose for 3 weeks could induce chronic oxidative stress, reduce the growth performance and alter gut microbiota in weaned piglets.

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