Project description:In the present study, the eggs of Chinese pond turtles (Mauremys reevesii) were incubated at three temperatures (26℃, 29℃ and 32℃). During the thermosensitive period (TSP) of incubation, the adrenal-kidney-gonad (AKG) complexes were sampled, and a comprehensive investigation for miRNAs was performed using next-generation small RNA sequencing.
Project description:In the present study, the eggs of Chinese pond turtles (Mauremys reevesii) were incubated at three temperatures (26℃, 29℃ and 32℃). During the thermosensitive period (TSP) of incubation, the adrenal-kidney-gonad (AKG) complexes were sampled, and the transcriptome differences of the AKG samples were investigated using next-generation sequencing, then candidate genes associated with temperature-dependent sex determination of Reeves' Turtle were identified.
Project description:We report the expression profiles of putative genes involved in temperature-dependent sex determination across multiple developmental stages in turtles, and contrast this data with equivalent stages in turtles with sex chromosomes
Project description:Pain management is an important issue in veterinary medicine, requiring biomarkers with high sensitivity and specificity for the timely and effective treatment. Emerging evidence suggests that miRNAs are promising pain-related markers. The aims were to profile the circulating miRNA signature in plasma of turtles (Trachemys scripta) and point out potential candidate biomarkers of pain. Plasma of female turtles underwent surgical gonadectomy were collected 24h pre-surgery, and 2.5h and 36 h post-surgery. The expression of miRNAs was profiled by Next Generation Sequencing and the dysregulated miRNAs were validated using RT-qPCR. The diagnostic value of miRNAs was calculated by ROC curves.
Project description:Most existing RNA sequencing methods rely on cell lysis or fixation, limiting their use in longitudinal studies of the same cell population. Here, we introduce POND-seq (Protein nanocage-empOwered Non-Destructive sequencing), a strategy that employs secretory protein nanocages fused to RNA-binding proteins (RBPs) to recover RBP-associated RNAs from living cells. POND-seq robustly identifies RNA targets of cytoplasmic RBPs across multiple cell types and enables longitudinal tracking of dynamic changes in RBP-associated RNA profiles under stress conditions. Fusion to PABPC1 further allows monitoring of transcriptomic responses and selectively profile cell-type-specific transcriptomes from mixed populations without cell dissociation and sorting. Additionally, POND-seq supports functional interrogation of RBP domains and residues involved in RNA association and enables scalable analysis of RBP variants, as demonstrated by a systematic assessment of disease-associated FMR1 mutations. Together, POND-seq provides a versatile and scalable platform for non-destructive and longitudinal analysis of cytoplasmic transcriptome and RBP-associated RNAs.
Project description:Western painted turtles (Chrysemys picta bellii) are the most anoxia-tolerant tetrapod. Survival time improves at low temperature and during ontogeny, such that adults acclimated to 3oC survive far longer without oxygen than either warm-acclimated adults or cold-acclimated hatchlings. Since protein synthesis is rapidly suppressed to save energy at the onset of anoxia exposure, this study tested the hypothesis that cold-acclimation would evoke preparatory changes in protein expression that would support enhanced anoxia survival in adult but not hatchling turtles. The relative abundances of 1316 identified proteins were compared between temperatures and developmental stages.
Project description:An European eel-specific microarray platform was developed to identify genes involved in response to pollutants. A comparative analysis of gene expression was conducted between European eel Anguilla anguilla individuals from lowly-polluted Wijmeers pond at Uitbergen (Belgium), highly-polluted Hazewinkel pond at Willebroek (Belgium), extremely-polluted Dessel-Schotel canal at the locations of Schotel (Belgium) and low polluted Bolsena lake (Italy) environments.
Project description:In 2010, the Deepwater Horizon oil spill resulted in an estimated loss of 61,000–174,000 sea turtles in the Gulf of Mexico. Rescued Kemp’s ridley sea turtle exhibited adverse effects, including physiological stress and severe derangements. While prior studies evaluated health impacts of oil exposure, effects on plasma proteins remained largely unexplored. This study compared the plasma proteome of turtles from two oiling categories (OC) before and after rehabilitation. Plasma samples were collected from lightly oiled (n=9) and heavily oiled (n=15) turtles at admission and post-rehabilitation. Proteins were analyzed using label-free tandem mass spectrometry. At admission, few differences were observed between groups, with 17 proteins reduced in heavily oiled turtles relative to lightly oiled turtles. After rehabilitation, no significant differences were detected, suggesting normalization of the plasma proteome. Osteocalcin, a bone mineralization and metabolic hormone, displayed a large increase after recovery implicating a mechanistic role for this hormone in the recovery of sea turtles. Unexpectedly, alpha-fetoprotein was the most abundant plasma protein in 41 of 48 samples representing 20.2 ± 3.1% of the molar protein fraction surpassing albumin which is routinely measured for diagnostic evaluation. These findings demonstrate that plasma proteomics can distinguish oiling status and support future biomarker development.
Project description:Using iChIP, we map H3K27Ac, H3K4me3 and H3K4me1 in small populations (HSPCs) in the presence or absence of Med12 and identify affected super-enhancers. iChIP was performed using previously published protocols (Lara-Astiaso et al, 2014 Immunogenetics. Chromatin state dynamics during blood formation - Science, 345, 6199)
Project description:Using iChIP, we map H3K27Ac, H3K4me3 and H3K4me1 in small populations (HSPCs) in the presence or absence of Med12 and identify affected super-enhancers. iChIP was performed using previously published protocols (Lara-Astiaso et al, 2014 Immunogenetics. Chromatin state dynamics during blood formation - Science, 345, 6199) Examination of histone modification in mouse HSPCs with and without Med12
