Effects of high concentrate rations on ruminal fermentation and microbiota of yaks.

Relationship between intestinal microbial dysbiosis and primary liver cancer

Objective To evaluate the effect of curcumin on the mammalian target of rapamyein(mTOR)signaling pathway during ischemia-reperfusion(I/R)injury in isolated rat lungs. Methods Sixty-four clean-grade healthy male Sprague-Dawley rats, aged 3-4 months, weighing 250-320 g, were divided into 4 groups(n=16 each)using a random number table method: sham operation group(S group), I/R group, low-dose curcumin group(LC group)and high-dose curcumin group(HC group). The rats only received in vitro perfusion without ischemia in S group.Isolated rat lungs were subjected to 60 min of ischemia followed by 75-min reperfusion to establish the lung I/R injury model in I/R group.Curcumin 5 and 10 μmol/L were added to perfusion fluid from the beginning of reperfusion in LC and HC groups, respectively.Airway resistance(Res), lung compliance, perfusion flow(Flow)and pulmonary venous partial pressure of oxygen(PaO2)were recorded at 10 min of first perfusion(T0)and 15, 45 and 75 min of reperfusion(T1-3). Wet/dry lung weight ratio(W/D ratio)was measured at the end of reperfusion.The morphological structure and ultrastructure of lung tissues were observed by using a light microscope and a transmission electron microscope, respectively.The expression of mTOR, Tau protein, nuclear factor kappa B(NF-κB)and tumor necrosis factor-alpha(TNF-α)mRNA in lung tissues was detected by real-time polymerase chain reaction.The expression of mTOR, phosphorylated Tau protein(pS396 Tau protein), NF-κB and TNF-α protein in lung tissues was determined by Western blot. Results Compared with S group, Res at T1-3 and W/D ratio at T3 were significantly increased, lung compliance, Flow and PaO2 were decreased at T1-3, and the expression of mTOR, NF-κB and TNF-α protein and mRNA, Tau protein mRNA and pS396 Tau protein was up-regulated at T3 in I/R, LC and HC groups(P<0.05). Compared with I/R group, Res at T1-3 and W/D ratio at T3 were significantly decreased, lung compliance, Flow and PaO2 were increased at T1-3, and the expression of mTOR, NF-κB and TNF-α protein and mRNA, Tau protein mRNA and pS396 Tau protein was down-regulated at T3 in LC and HC groups(P<0.05). Compared with LC group, Res at T1-3 and W/D ratio at T3 were significantly decreased, lung compliance, Flow and PaO2 were increased at T1-3, and the expression of mTOR, NF-κB and TNF-α protein and mRNA, Tau protein mRNA and pS396 Tau protein was down-regulated at T3 in HC group(P<0.05). The microscopic examination showed that the injury to lung tissues was significantly attenuated in LC and HC groups as compared with I/R group. Conclusion The mechanism by which curcumin reduces I/R injury in isolated rat lungs is related to inhibiting mTOR signaling pathway. Key words: Curcumin; Lung; Reperfusion injury; Protein kinase C

Short-term or acute temperature stress affect the immune responses and alters the gut microbiota of broilers, but the influences of long-term temperature stress on stress biomarkers and the intestinal microbiota remains largely unknown. Therefore, we examined the effect of three long-term ambient temperatures (high (HC), medium (MC), and low (LC) temperature groups) on the gene expression of broilers’ heat shock proteins (Hsps) and inflammation – related genes, as well as the caecal microbial composition. The results revealed that Hsp70 and Hsp90 levels in HC group significantly increased, and levels of Hsp70, Hsp90, IL-6, TNF-α, and NFKB1 in LC group were significantly higher than in MC group (p < 0.05). In comparison with the MC group, the proportion of Firmicutes increased in HC and LC groups, while that of Bacteroidetes decreased in LC group at phylum level (p < 0.05). At genus level, the proportion of Escherichia/Shigella, Phascolarctobacterium, Parabacteroides,and Enterococcus increased in HC group; the fraction of Faecalibacterium was higher in LC group; and the percentage of Barnesiella and Alistipes decreased in both HC and LC groups (p < 0.05). Functional analysis based on communities’ phylogenetic investigation revealed that the pathways involved in environmental information processing and metabolism were enriched in the HC group. Those involved in cellular processes and signaling, metabolism, and gene regulation were enriched in LC group. Hence, we conclude that the long-term temperature stress can greatly alter the intestinal microbial communities in broilers and may further affect the host’s immunity and health.

We investigated the effect of sodium butyrate feeding on the disruption of ruminal epithelium barrier function in goats fed a high-concentrate diet. A total of 18 male Boer goats (live weight of 31.75 ± 1.35 kg, aged 1 year) were randomly assigned to three groups, which were fed a low-concentrate diet (LC), a high-concentrate diet (HC), or a high-concentrate diet with 1% sodium butyrate by weight (SH) for 9 weeks. We found that the pH of rumen fluid in the SH and LC groups was higher than that in the HC group. The activity of protein kinase C (PKC) kinase in the rumen epithelium was higher in the HC group than that in the LC and SH groups. The mRNA expression and phosphorylated protein levels of mitogen-activated protein kinases (MAPKs) in the rumen epithelium were lower in the SH and LC groups than those in the HC group. The DNA methylation rate of occludin was higher in the HC group than that in the SH and LC groups. The mRNA and protein expression of claudin-1, claudin-4, occludin, and zona occludin-1 was greater in the SH and LC groups than that in the HC group. In addition, sodium butyrate mitigated damage to the rumen epithelium caused by the HC diet. Together, our results suggest that the supply of sodium butyrate reverses the damage of rumen epithelium tight junction by inhibiting PKC and MAPK signaling pathways and is protective to the rumen epithelium during subacute rumen acidosis.

Objective To investigate the correlation of exosomal miRNA-122 expression with circulating miRNA-122 expression in patients with HCV infection. Methods Twenty four patients with chronic hepatitis C (CHC group), 21 patients with HCV-related liver cirrhosis (LC group), 15 patients with HCV-related hepatocellular carcinoma (HCC group) and 20 healthy subjects (HC group) were enrolled from Hanzhong Central Hospital of Shanxi Province during January 2012 and December 2015. Total RNAs were extracted from exosome in all the subjects. The expressions of miRNA-122 both in exosome and serum were detected by real-time quantitative polymerase chain reaction (qPCR). ANOVA was used to analyze the differences in miRNA-122 expression, and Pearson correlation test was performed to analyze the correlation of exosomal miRNA-122 with circulating miRNA-122. Results Taking exosomal and circulating miRNA-122 expression in healthy control as 1.00, the relative exosomal miRNA-122 expressions in CHC, LC and HCC group were 1.33±0.11, 0.98±0.13, 0.52±0.09, respectively(F=3.316, P<0.05). Exosomal miRNA-122 level in CHC group was higher than that in HC and HCC group (t=4.028 and 9.906, P<0.05), it was higher in LC group than that in HCC group (t=5.631, P<0.05), and it was lower in HCC group than that in HC group significantly (t=5.878, P<0.05). Serum circulating miRNA-122 expressions were 3.66±1.11, 2.88±0.71 and 2.16±0.48 in CHC, LC and HCC group, respectively(F=7.823, P<0.05), the circulating miRNA-122 expression was higher in CHC group than that in HC group (t=4.653, P<0.05). Pearson correlation analysis showed that there was positive correlation between exosomal miRNA-122 level and circulating miRNA-122 level in CHC group (r=0.512, P<0.05), but negative correlation in HCC group (r=-0.223, P<0.05). Conclusions Exosomal miRNA-122 may be used as novel serological biomarkers for detecting chronic hepatitis C and HCV-related HCC. Key words: Hepatitis C antibodies; Serum; Exosome; MicroRNAs-122

One possible complication of stellate ganglion block (SGB) is respiratory compromise. No study has yet addressed the comparison of its effect on lung function and clinical features, including Horner's syndrome, changes in temperature, sensory and motor functions, and adverse events of lower versus higher concentrations (LC and HC, respectively) of local anesthetics in an ultrasound-guided SGB. Fifty patients were randomized into 1 of 2 groups: the LC group (5 mL of 0.5% mepivacaine) and the HC group (5 mL of 1% mepivacaine). One anesthesiologist performed a C6- SGB under ultrasound guidance. Our primary objective was to compare LC and HC of a local anesthetic in terms of its effect on lung function, and the secondary objective was to compare the clinical features between LC and HC of a local anesthetic. Lung function was compared between the 2 groups using the Mann-Whitney U test. The forced vital capacity at 20 minutes post-SGB was not significantly different between the HC and the LC groups (P = .360); the median difference (95% confidence intervals [CI]) was 1 (-1 to 8). Other parameters of lung function were comparable with the forced vital capacity. Patients in the HC group had significantly greater sensory changes than those in the LC group (% decrease compared with the unblocked side); 95.4 ± 2.1 (CI: 91.11-99.73) vs 87.3 ± 3.5 (CI: 80.12-94.49). Lung function between the LC and HC groups after SGB did not differ significantly. Clinical features between the 2 groups also did not differ clinically, except that patients in the HC group had significantly greater sensory loss in the C6 dermatomes.

Objective To investigate the community structure of intestinal bacteria from patients with cirrhosis and its influencing factors. Methods From 2016 to 2017, 24 patients with liver cirrhosis (the LC group) and 23 healthy family members of patients (the HC group) were enrolled at the First Hospital of Lanzhou University. A comparative analysis of the community structure of intestinal bacteria was performed using 16S rRNA gene sequencing in LC and HC groups. Combined with LEfSe analysis and NMDS analysis, the differential markers were screened and the factors affecting the intestinal community structure of subjects were studied. Results The dominant six phylum of bacteria in intestines in LC and HC groups included Firmicutes, Bacteroides, Proteobacteria, Actinobacteria, Fusobacteria and Tenericumes. However, in the LC sample, Firmicutes was significantly reduced, while Bacteroides was significantly increased. The diversity of intestinal bacteria was significantly reduced, and the Firmicutes/Bacteroides ratio was significantly decreased, suggesting a variation of the community structure in intestinal bacteria of cirrhosis patients. The LEfSe result indicated that the abundance of Enterococcus, Lactobacillales, Bacilli, and Bacteroidetes showed a significant difference in the LC sample, which may be used as potential marked bacterial groups for cirrhosis. The NMDS analysis revealed a positive relationship between the concentration of Cd and Pb and the abundance of intestinal bacteria in the LC sample. Conclusion The community structure of intestinal bacteria from patients with cirrhosis has changed. Enterococcus, Lactobacillales, Bacilli, and Bacteroidetes are potential marked bacterial groups. The concentration of Cd and Pb in the intestinal tract of cirrhosis patients may interact with the abundance and structure of bacteria, and further affect the occurrence and development of cirrhosis. Key words: Cirrhosis; Intestinal bacteria; Bacterial community structure; Influencing factor

The moon jellyfish (Aurelia aurita) is a scyphozoan frequently maintained in public and private aquaria. Little research has been conducted to investigate the effects of various drugs, such as anesthetics, in this species. Tricaine methanesulfonate (MS-222), a common immersion anesthetic for fish and amphibians, was evaluated in a managed population of moon jellyfish. Twenty-four clinically healthy jellyfish were assigned into three groups of eight for trials of 0.3 g/L MS-222 (low concentration [LC]), 0.6 g/L MS-222 (high concentration [HC]), and a saltwater control. The goal was to evaluate the effects of MS-222 administration on moon jellyfish movement and response to stimuli. Movement and response to stimuli were measured via rocking and probe stimulus tests and observations of bell contraction quality and body tone. These tests were performed at baseline and throughout both drug exposure and recovery periods. A threshold drug effect was defined based on systematic scoring criteria. Additionally, elastomer tags were administered to four of eight animals in each MS-222 group to evaluate response to tag placement after drug exposure. Threshold drug effect was achieved in six of eight individuals in the LC group and eight of eight individuals in the HC group. The LC group had median threshold and recovery times of 12.2 and 10.1 min, respectively, while the HC group had median threshold and recovery times of 4.0 and 19.9 min, respectively. The HC group had significantly faster time to threshold drug effect (P < 0.001) and longer recovery times (P= 0.005) than the LC group. In both the LC and HC tagged group, three of four jellyfish had no reaction to tag placement. All animals recovered uneventfully, and there were no mortalities. MS-222 at 0.3 and 0.6 g/L decreased movement and response to stimuli in moon jellyfish.

Background: Salinity is one of the main influencing factors in the culture environment and is extremely important for the survival, growth, development and reproduction of aquatic animals. Methods: In this study, a comparative transcriptome analysis (maintained for 45 days in three different salinities, 30 psu (HC group), 18 psu (MC group) and 3 psu (LC group)) was performed by high-throughput sequencing of economically cultured Penaeus monodon. P. monodon gill tissues from each treatment were collected for RNA-seq analysis to identify potential genes and pathways in response to low salinity stress. Results: A total of 64,475 unigenes were annotated in this study. There were 1,140 upregulated genes and 1,531 downregulated genes observed in the LC vs. HC group and 1,000 upregulated genes and 1,062 downregulated genes observed in the MC vs. HC group. In the LC vs. HC group, 583 DEGs significantly mapped to 37 signaling pathways, such as the NOD-like receptor signaling pathway, Toll-like receptor signaling pathway, and PI3K-Akt signaling pathway; in the MC vs. HC group, 444 DEGs significantly mapped to 28 signaling pathways, such as the MAPK signaling pathway, Hippo signaling pathway and calcium signaling pathway. These pathways were significantly associated mainly with signal transduction, immunity and metabolism. Conclusions: These results suggest that low salinity stress may affect regulatory mechanisms such as metabolism, immunity, and signal transduction in addition to osmolarity in P. monodon. The greater the difference in salinity, the more significant the difference in genes. This study provides some guidance for understanding the low-salt domestication culture of P. monodon.

The aim of the study was to evaluate the impact of carbohydrate-to-fat ratio on body weight and appetite regulation in Wistar rats. Twenty-four Wistar rats were randomized to three dietary groups (n = 8): normal carbohydrate diet (NC), low-carbohydrate diet (LC) and high-carbohydrate diet (HC) for 12 weeks. Body weight and food intake were recorded. Circulating leptin and insulin levels were measured by radioimmunoassay method. The expression levels of leptin receptor, insulin receptor, orexin, neuropeptide Y (NPY), agouti-related protein (AgRP) and melanocortin-4 receptor (MC-4R) in the hypothalamus were also measured by realtime polymerase chain reaction (PCR). In the LC group, food intake reduced while body weight increased significantly compared with the NC and HC groups. Plasma leptin levels increased in the LC (18.5 +/- 8.2 ng/mL) group compared with the NC (8.6 +/- 3.8 ng/mL, P < 0.001) and HC (6.6 +/- 1.9 ng/mL, P < 0.001) groups. Realtime reverse transcription-PCR revealed a decrease in the hypothalamic expression level of only leptin receptor in the LC (0.764, 0.471-4.648 copy/mL) and HC (0.357, 0.129-0.781 copy/mL) groups compared with the NC (1.323, 0.616-2.392 copy/mL; P = 0.01) group, and that there was no significant change in those of insulin receptor, AgRP, Orexin, NPY and MC-4R. Low-carbohydrate, high-fat diet raised body weight, which led to a rising of circulating leptin levels and a reduced expression of leptin receptor in the hypothalamus.

This study investigates the effect of the Pain Sensitivity Questionnaire (PSQ) in guiding patient controlled intravenous analgesia (PCIA) on postoperative analgesia in women undergoing cesarean section. A total of 160 women who were to undergo a cesarean section under combined spinal and epidural anaesthesia were included in this study. Women with a preoperative PSQ <4 were randomly divided into a low pain-sensitive control group (LC group), and a low pain-sensitive observation group (LO group), and women with preoperative PSQ >6 were randomly divided into a high pain-sensitive control group (HC group) and a high pain-sensitive observation group (HO group). After the surgery, patients received the pump butorphanol concentration was 3.5 µg·kg-1·h-1 in the LC and HC groups, 3.0 µg·kg-1·h-1 in the LO group and 4.0 µg·kg-1·h-1 in the HO group.To compare the analgesic effects of postoperative PCIA and postoperative recovery in women. Wound pain and uterine contraction pain VAS scores at rest and activity were significantly lower in the LC group than in the LO group at 4 and 8 h postoperatively (P<0.05). Similarly, wound pain and uterine contraction pain VAS scores at rest and activity were significantly lower in the HO group than in the HC group at 8, 12, and 24 h postoperatively (P<0.05). The Ramsay scores were significantly higher in the LC than in the LO groups at 4, 8, 12, 24, and 48 h postoperatively (P<0.05), but there was no statistically significant difference between the Ramsay scores in the HC group and the HO group. There was no statistical difference in any of the post-operative recoveries (P>0.05). Compared to the weight-based postoperative PCIA, the PSQ-based postoperative PCIA has better analgesic effects and can improve maternal satisfaction with postoperative analgesia.

The aim of this study was to examine the effects of supplementing Guizhou black goats with Houttuynia cordata extract (HCE) during summer on growth performance, anti-inflammatory activity, and rumen fermentation parameters. A completely randomized single-factor experimental design was employed. Twenty-four healthy Guizhou black goats, with similar body weights (16.03 ± 0.79 kg), were randomly divided into three groups, with eight replicates per group and one goat per replicate. The control group (CON) was fed a basal diet, the LC and HC groups received the basal diet supplemented with 500 mg/kg and 1,000 mg/kg of HCE, respectively. The ADG in the HC group was significantly higher (p < 0.05) than that in the CON group. The digestibility of DM in both the LC and HC groups was significantly higher (p < 0.05) than in the CON group. Additionally, the digestibility of CP, GE, and NDF in the HC group was significantly higher (p < 0.05) than in the CON group. GSH-Px levels in both the LC and HC groups were significantly higher (p < 0.05) than in the CON group. T-AOC in the HC group was also significantly higher (p < 0.05) than in the CON group. MDA levels in the HC group were significantly lower (p < 0.05) than in both the LC and CON groups (p < 0.05). The TP content in the HC group was significantly higher (p < 0.05) than in the CON group. IgA levels in both the LC and HC groups were significantly higher (p < 0.05) than in the CON group. The levels of IL-6 and IL-8 in the HC group were significantly lower (p < 0.05) than in the LC and CON groups. Interestingly, the IL-10 level in the HC group was significantly higher (p < 0.05) than in the LC and CON groups. The TNF-α level in the HC group was significantly lower (p < 0.05) than in the CON group. The HCE had no significant (p > 0.05) effect on rumen pH, NH3-N, and VFAs. In conclusion, a high dose of HCE improved growth performance, apparent nutrient digestibility, and enhanced antioxidant, immune, and anti-inflammatory responses in goats.

The aim of this study is to determine the effects of a high-concentrate diet on growth performance, serum biochemical indexes, and rumen microbiota in house-fed yaks. Sixteen male yaks (body weight, 151.73 ± 14.11 kg; 18 months) were randomly allocated into two dietary treatments: a group with a low level of concentrate (n = 8, LC, concentrate-forage = 40:60) and a group with a high level of concentrate (n = 8, HC, concentrate-forage = 60:40). We found that compared with the LC group, the average daily feed intake (ADFI), the average daily gain (ADG), and the serum albumin (ALB) concentration in the HC group were significantly increased (p < 0.05). The rumen bacterial compositions also differed significantly between the groups, as indicated by principal coordinate analysis (p < 0.05). Firmicutes and Bacteroidota were the main dominant phyla of rumen bacteria in yaks. Compared with the LC group, the relative abundance of Firmicutes in the HC group was significantly increased (p < 0.05) and the relative abundance of Bacteroidota was significantly decreased (p < 0.05). At the genus level, Rikenellaceae_RC9_gut_group, Succiniclasticum, Prevotella, Christensenellaceae_R-7_group, and NK4A214_group had the highest relative abundance. The relative abundance of Christensenellaceae_R-7_group in the HC group was significantly higher than that in the LC group (p < 0.05). The PICRUSt 2 results showed a significant enrichment in glycosaminoglycan degradation, apoptosis, and ECM-receptor interaction in HC relative to LC (p < 0.05). In conclusion, high-concentrate diets can enhance growth performance and alter the compositions and functions of ruminal bacterial communities in yaks.

BACKGROUND/OBJECTIVESCalcium is important but deficient in diets of young adult women. This study aimed to examine if cognitive factors and eating behaviors differ according to calcium intake based on the Social Cognitive Theory.SUBJECTS/METHODSSubjects were female college students in Seoul, Korea. Three hundred students completed the questionnaire regarding calcium intake, nutrition knowledge, outcome expectations, self-efficacy and eating behaviors. Data on 240 students were analyzed using t-test or χ2-test. Subjects were categorized into two groups, high calcium intake (HC, ≥ 650 mg/day) and low calcium intake (LC, < 650 mg/day), according to recommended intakes of calcium for women aged 19-29 years.RESULTSThe LC group constituted 77.9% of total subjects. Nutrition knowledge was not different according to calcium intake. Three out of 12 outcome expectations items were significantly different between the HC and LC groups. Subjects in the HC group agreed more strongly with the practical benefits of consuming calcium-rich foods, including 'taste' (P < 0.01) and 'going well with other snacks' (P < 0.05), compared to those in the LC group. Negative expectations of 'indigestion' were stronger in the LC group than HC group (P < 0.001). Among self-efficacy items, perceived ability of 'eating dairy foods for snacks' (P < 0.001), 'eating dairy foods every day' (P < 0.01), and 'eating calcium-rich side dishes at meals' (P < 0.05) differed significantly between the HC and LC groups. Eating behaviors including more frequent consumption of dairy foods, fruits or fruit juice (P < 0.001), anchovy, seaweeds, green vegetables, protein-rich foods (P < 0.05), and less frequent consumption of sweets or soft drinks (P < 0.01) were significantly related to calcium intake.CONCLUSIONSThis study found that outcome expectations, self-efficacy in consuming calcium-rich foods, and eating behaviors are important in explaining calcium intake. Nutrition education needs to address practical benefits, reduce negative expectations of calcium-rich foods, increase self-efficacy, and modify eating behaviors contributing to calcium intake.

Effects of imidacloprid on the oxidative stress, detoxification and gut microbiota of Chinese mitten crab, Eriocheir sinensis