Project description:We describe here transcripts induced after infection of zebrafish with Spring Viremia Carp Virus (SVCV). Two days after infection, differentially expressed transcript levels from selected immune-related zebrafish genes were studied in internal organs (pooled spleen, head kidney). Also, transcripts from resistant fishes to viral infection one month after inoculation were studied. Three different experiments were performed to get three biological replicates. Fishes were divided into two groups in each experiment. First group was infected by immersion with SVCV 10^7 pfu/ml, second group was used as a control of non-infected fishes. 6 fishes per group were sacrificed two days post infection, whereas the rest of the infected fishes from the three experiments were maintained for 30 days in the aquariums and then survivors (six for experiment) were sacrificed. This submission includes three biological replicate groups for the non-infected fish and the two days post-infected fish, and two biological replicate groups for the 30 days post-infected fish.
Project description:We describe here transcripts induced after intraperitoneal injection of rainbow trout with 2 different viruses, both belonging to strain 23.75 of viral hemorrhagic septicemia virus (VHSV): a deleted Nv gene (dNV) virus and a wild type (wt) virus. Two days after infection, differentially expressed transcript levels from selected immune-related trout genes were studied in internal organs (spleen and head kidney). Fishes were divided in two groups (3 fishes per group). The first group was intraperitoneally injected with 100000 pfu per trout of dNV VHSV, while the second group was injected with 100000 pfu/trout of wt VHSV. All fishes were sacrificed two days post infection.
Project description:The krasV12-induced tumor progression was conducted on 100 transgenic fishes maintained in water containing 2µM mifepristone. Gross morphological and histological analyses were weekly performed on 15 randomly selected fishes to monitor tumor development. These analyses showed robust development of hepatocellular adenoma within 4 weeks of induction. Observation of tumor development and staging of tumorigenesis was conducted as described. For tumor regression the group of 15 fishes with HCC was transferred to mifepristone-free water. Histological examination revealed tumor shrinkage showing extensive scarring at the peripheral and focal tumor regions. Notably, complete tumor regression with scarred fibrosis of the former tumor tissue was observed after 4 weeks of mifepristone withdrawal.
Project description:Changes in gene expression are thought to be required for maintaining tissue's proper function under cold stress, but little is known about the role of each tissue in setting the cold tolerance ability in fish. Oreochromis niloticus and Danio rerio are two tropical fishes; they differ in their abilities of cold tolerance. In this study, both fishes were exposed to graded cold temperatures, ranging from 28°C to 18°C and 10°C, and the transcriptomes of 8 tissues at each tempeature were sequenced and compared. By characterizing tissue-based gene expression variation between the two fishes we identified some key tissue specific biological processes, which provide a better understating of the typical biological functions of tissues in physiological fitness under cold stress.
Project description:In order to explore the relative importance of adult zebrafish innate and adaptive immune responses to different kinds of infections, we compared the gene expression profile of VHSV-challenge-survivors, bacterial infection survivors and control non infected zebrafish. VHSV -infection-survivors zebrafish were divided in two groups of 12 individuals, first group was infected with VHSV (samples named A) and second group was mock-infected (samples named B). Two days after challenge, zebrafish of each group were divided in four subgroups (3 fishes per group) and head kidney and spleen of each individual were sampled. For each group, internal organs of three fishes were pooled, so four biological replicates were generated . Zebrafish surviving a natural infection caused by Aeromonas hydrophila and Vibrio fluvialis (samples named C) were divided in four groups (3 fishes per group) and head kidney and spleen were extracted. Finally, 12 healthy zebrafish were used as control group (samples named D) and processed in the same way as group C.
Project description:Transcriptional profiling performed from total eye RNA extracts of wildtype control fishes versus Prpf31 morpholino injected larvae (at ~72hpf)