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Low incubation temperature during early development negatively affects survival and related innate immune processes in zebrafish larvae exposed to lipopolysaccharide

ABSTRACT: Low incubation temperature during early development negatively affects survival and related innate immune processes in zebrafish larvae exposed to lipopolysaccharide

ORGANISM(S): Danio rerio

PROVIDER: GSE104639 | GEO | 2018/12/31

REPOSITORIES: GEO

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Low incubation temperature during early development negatively affects survival and related innate immune processes in zebrafish larvae exposed to lipopolysaccharide

Project description:Low incubation temperature during early development negatively affects survival and related innate immune processes in zebrafish larvae exposed to lipopolysaccharide

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Low incubation temperature during early development negatively affects survival and related innate immune processes in zebrafish larvae exposed to lipopolysaccharide.

Project description: Not available

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Embryonic incubation temperature has a long-term effect on the microRNA transcriptome of adult zebrafish

Project description:Zebrafish eggs were collected at 28 °C, and split into three temperature groups (24 °C, 28 °C, 32 °C) for incubation. When larvae reaching first feeding, the incubation temperature of larvae from 24 °C and 32 °C was gadually changed to 28 °C, and all fish were kept at 28 °C for later development until adulthood. At 100 d post-fertilization, seven replicates from each group were intraperitoneally (i.p.) injected with 2 μl of 50 mg/ml lipopolysaccharide (LPS) from Pseudomonas aeruginosa 10, while another seven replicates were i.p. injected with 2 μl phosphate-buffered saline as control. At 12 h post-injection, the spleen was dissected, and total RNA was isolated. Five LPS-treated replicates and five controls were used for building small RNA libraries and sequencing. A total of 112 novel miRNAs were identified using miRDeep2. By comparing fish from different embryonic incubation tmeperatures, 32 miRNAs (29 up-/3 down-regulated) were identified differentially expressed (DEmiRs, adjusted p-value < 0.05, |fold change| > 2.0, DESeq2) in fish from embryonic incubation temperature of 32 °C compared to fish kept at constant 28 °C, 3 DEmiRs (2 up-/1 down-regulated) were identified in response to LPS in fish kept at 28 °C. A total of 9,116 target genes were predicted using miRanda (v3.3a), including 8,224 genes targeted by 32 DE miRNAs and 892 genes targeted by 3 DE miRNAs.

2023-10-01 | GSE121164 | GEO

Embryonic incubation temperature has a long-term effect on the immune response of adult zebrafish

Project description:Zebrafish eggs were collected at 28 °C, and split into three embryonic incubation temperature groups (24 °C, 28 °C, 32 °C). When larvae reaching first feeding, the incubation temperature of larvae from 24 °C and 32 °C was gradually changed to 28 °C, and all fish were kept at 28 °C for later development until adulthood. At 100 d post-fertilization, 7 replicates from each temperature group were intraperitoneally (i.p.) injected with 2 μl of 50 mg/ml lipopolysaccharide (LPS) from Pseudomonas aeruginosa 10, while another 7 replicates were i.p. injected with 2 μl phosphate-buffered saline as control. At 12 h post-injection, the spleen was dissected, and total RNA was extracted. Five LPS-treated replicates and five controls were used for building RNA libraries and sequencing. The differential gene expression analysis were performed between fish from different embryonic incubation temperatures (24 °C vs 28 °C; 32 °C vs 28 °C), and between LPS treatment and control within each temperature group (24 °C LPS vs control; 28 °C LPS vs control; 32 °C LPS vs control). Totally, 251 differentially expressed genes (DEGs, 71 up-/180 down-regulated) were identified in fish from 24 °C embryonic incubation temperature compared to fish kept at constant 28 °C (DESeq2, adjusted p-value < 0.05, |fold change| > 1.5); and 660 DEGs (385 up-/275 down-regulated) were identified in fish from 32 °C embryonic incubation temperature compared to fish kept at 28 °C. By comparing LPS-treated fish to control, 567 DEGs (271 up-/296 down-regulated) were identified in fish from embryonic incubation temperature of 24 °C, 140 DEGs (80 up-/60 down-regulated) were identified in fish kept at constant 28 °C; and 49 DEGs (11 up-/38 down-regulated) were identified in fish from the 32 °C embryonic incubation temperature group.

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Project description:This study assessed the development of disseminated candidiasis within Galleria mellonella larvae and characterised the proteomic responses of Candida albicans to larval hemolymph. Infection of larvae with an inoculum of 1 × 106 yeast cell reduced larval viability 24 (53.33 ± 3.33%), 48 (33.33 ± 3.33%) and 72 (6.66 ± 3.33%) hour post infection. C. albicans infection quickly disseminated from the site of inoculation and the presence of yeast and hyphal forms were found in nodules extracted from infected larvae at 6 and 24 hours. A range of proteins secreted during infection of G. mellonella were detected in larval hemolymph and these were enriched for biological processes such as interaction with host and pathogenesis. The candicidal activity of hemolymph after immediate incubation of yeast cells resulted in a decrease in yeast cell viability (0.23 ± 0.03 × 106, p < 0.05) as compared to control (0.99 ± 0.01 × 106). extracellular (in vivo) proteome of C. albicans in larval hemolymph were assessed. C. albicans responds to incubation in hemolymph ex vivo by the induction of an oxidative stress response, a decrease in proteins associated with protein synthesis and an increase in glycolytic proteins.

2019-01-17 | PXD011997 | Pride

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