Project description:Relative expression levels of mRNAs in chicken cecal epithelia experimentally infected with Eimeria tenella were measured at 4.5 days post-infection. Two weeks old chickens were uninfected (negative control) or were orally inoculated with sporulated oocysts of Eimeria tenella. Cecal epithelia samples were collected from >12 birds in infected or uninfected group at 4.5 d following infections, in which samples from 4 birds were pooled together to form a total 3 biological replicates in each group. Parasite merozoites were also collected from four infected chickens at 5 d after infections. Uninfected control samples, merozoites and infection group samples were selected for RNA extraction and hybridization on Affymetrix microarrays. We used Affymetrix GeneChip chicken genome arrays to detail the chicken cecal epithelia gene expression in the control and E. tenella-infected birds.
Project description:Relative expression levels of mRNAs in chicken cecal epithelia experimentally infected with Eimeria tenella were measured at 4.5 days post-infection. Two weeks old chickens were uninfected (negative control) or were orally inoculated with sporulated oocysts of Eimeria tenella. Cecal epithelia samples were collected from >12 birds in infected or uninfected group at 4.5 d following infections, in which samples from 4 birds were pooled together to form a total 3 biological replicates in each group. Parasite merozoites were also collected from four infected chickens at 5 d after infections. Uninfected control samples, merozoites and infection group samples were selected for RNA extraction and hybridization on Affymetrix microarrays. We used Affymetrix GeneChip chicken genome arrays to detail the chicken cecal epithelia gene expression in the control and E. tenella-infected birds. Infected, uninfected chicken cecal epithelia and merozoites were selected for RNA extraction and hybridization with Affymetrix microarrays. Our goal was to analyze global transcriptome changes in chicken cecal mucous membranes in response to E. tenella infection in vivo. We used infected (T1,T2,T3; three biological replicates) and uninfected (Neg1, Neg2, Neg3; three biological replicates) samples to identify genes that were differentially expressed. Meanwhile, RNA and probes were also prepared from parasite merozoites (Mzt) from infected samples (Mzt) and used as an additional control in microarray hybridization.
Project description:In order to elucidate the infection mechanisms of Eimeria tenella and the chicken immune response, chickens were infected with Eimeria tenella strain Hougton sporozoites. Samples were taken at 0, 1, 2, 3, 4 and 10 days post-infection and mRNA sequenced. A dual-RNA seq analysis was carried out, comparing the expression of infected chickens during each sampling time point with uninfected chickens and comparing E. tenella samples during the infection with a sample of pure sporozoites. The results show a variety of response signals in the chicken, both previously known and unknown, as well as a clear role for a variety of infection-related genes in E. tenella
Project description:In order to elucidate the infection mechanisms of Eimeria tenella and the chicken immune response, chicken macrophage cell cultures of cell line HD-11 were infected with Eimeria tenella strain Hougton sporozoites. Samples were taken at 0, 2, 4, 12, 24, 48 and 72 hours post-infection and, purified and mRNA sequenced. A dual-RNA seq analysis was carried out, comparing the expression of infected chicken macrophages with uninfected ones at the same time points post-infection and comparing E. tenella samples during the infection with a sample of pure sporozoites. The results show a variety of response signals in the chicken, both previously known and unknown, as well as a clear role for different sets of SAG and MIC proteins for sporozoites and merozoites of E. tenella
Project description:In order to explore the potential therapeutic mechanisms of Bacillus subtilis (B. subtilis) probiotic under Eimeria tenella (E. tenella) infection, we performed Transcriptome analysis. A total of 63 Chinese native yellow chickens were purchased from a commercial hatchery and reared in 9 coccidia-free cages with free access to feed and water for up to 28 days. Upon arrival, all chicks were weighed and randomly divided into one of three experimental groups with 21 birds in each group. The three groups consisted of negative control untreated non-challenged group (NC), positive control untreated challenged group (PC) and B. subtilis-fed challenged group (BS + ET). Challenged and non-challenged groups were housed in two different rooms for avoiding the transmission of disease. Temperature (32 to 34 °C for 1st week and then decreased by 2 °C per week), humidity (60 to 80%) and light (23 h L:1D) of both rooms were maintained during the entire period of experiment. On day 21 of age, the chickens in group PC and BS + ET were challenged with 6 × 10^4 E. tenella sporulated oocysts, whereas the chickens in group NC were gavaged with normal saline to provide same management stress. On day 28 of age (day 7 post-infection), 3 individual chickens per group were euthanized humanely by direct heart puncture and caecum tissue samples of all groups were collected for analyzing the whole transcriptional responses to the exposure of probiotic under an induced E. tenella infection in chickens. Totally, 1902 DEGs were up-regulated and 1589 DEGs were down-regulated in the positive control group versus negative control group. 341 up-regulated and 124 down-regulated DEGs were found in the comparison of BS + ET group versus NC Group, while 784 up-regulated and 493 down-regulated DEGs were found in BS + ET versus PC group.
Project description:Comparative analysis of chicken Intestinal Intraepithelial lymphocytes (IEL) following Eimeria acervulina (EA), E. maxima (EM), or E. tenella (ET) infection
Project description:Relative expression levels of mRNAs in chicken IEL experimentally infected with EA, EM, or ET were measured at 1 to 6 days post-infection (dpi) following primary and secondary infections. One week-old chickens were uninfected (negative control) or were orally inoculated with sporulated oocysts of EA, EM, or ET. One week later, the infected chickens were challenged with an identical inoculum of the homologous parasite. Intestinal samples were collected daily from 5 birds in a treatment group at from 1 to 6 dpi following primary and secondary infections. Cecum, duodenum, and jejunum were collected from the birds challenged with E. acervulina, E. maxima, and E. tenella, respectively. Uninfected control samples and one of the 3 infection group samples were labeled with different fluorescent dyes and hybridized simultaneously on the same slide using a reference design with a dye swap protocol.