bioRxiv Science⌕ Search

bioRxiv · 10.1101/490276

Comparative Transcriptomes Analysis of Taenia pisiformis at Different Development Stages

Abstract

To understand the characteristics of the transcriptional group of Taenia pisiformis at different developmental stages, and to lay the foundation for the screening of vaccine antigens and drug target genes, the transcriptomes of adult and larva of T. pisiformis were assembled and analyzed using bioinformatic tools. A total of 36,951 unigenes with a mean length of 950bp were formed, among which 12,665, 8,188, 7,577, and 6,293 unigenes have been annotated respectively by sequence similarity analysis with four databases (NR, Swiss-Prot, KOG, and KEGG). It should be noted there are 5,662 unigenes that share good similarity with the four databases and get a relatively perfect functional annotation. Besides, a total of 10,247 differentially expressed genes were screened. To be specific, 6,910 unigenes were up-regulated in the larva stage while 3,337 were down-regulated in the adult stage. To sum up, this study sequenced and analyzed the transcriptomes of the larval and adult stages of T. pisiformis. The results of differentially expressed genes in these two stages could provide basis for functional genomics, immunology and gene expression profiles of T. pisiformis.

Explore related subjects

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

Chen, L., Jing, Y., Xu, J., Wang, W., Ji, L., Yang, C., Yu, H.. 2018-12-09. Comparative Transcriptomes Analysis of Taenia pisiformis at Different Development Stages. https://doi.org/10.1101/490276

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related preprints

Physiological mapping and prediction reveal stress-responsive translation initiation landscapes

Translation initiation defines the protein output of the transcriptome, but its physiological dynamics in cells and tissues remain incompletely characterized. Here we develop TISCA2, an inhibitor-free method that captures eIF5B-associated initiating ribosomes to map translation initiation sites genome-wide. By directly identifying start sites rather than inferring translation from elongating-ribosome periodicity, TISCA2 improves the detection of short and overlapping translons. Translation of a subset of TISCA2-identified translons is supported by N-terminal proteomics and HLA-I immunopeptidomics. The arsenite-induced integrated stress response broadly redistributes start-site usage, reducing upstream initiation in favor of downstream initiation. TISCA2 further reveals tissue-specific initiation landscapes in vivo, with increased detection of downstream candidate start sites in the testis. Finally, we develop IncepTIS, a sequence-based deep learning model that predicts position-resolved and condition-dependent initiation landscapes. IncepTIS-guided optimization generates de novo mRNA 5' leaders with stress-responsive initiation patterns. Together, TISCA2 and IncepTIS provide an experimental and computational framework for mapping, predicting and engineering translation initiation in mammalian cells and tissues.

molecular biology↗

Optimal compositions of potent sliced-siRNA with DNA bases substitution and insights of Ago2 slicing actions

We have previously characterized the nucleotide compositions of single-stranded ago2-sliced small interfering RNAs (sliced-siRNA, sliRNA), a novel type of potent RNAi trigger designed based on the biogenesis mechanism of miRNA-451. sliRNAs have on par antisense mediated silencing activity but about 1000-fold reduced passenger strand activity compared to siRNA. In the current study, to further characterize sliRNAs to facilitate their in vivo application, we have investigated the effects of substituting RNA nucleotides (nts) in sliRNA with DNA nts (sliDRNAs), which will allow us to study the potential effects on their processing, maturation, and silencing activity from individual or multiple nts at different positions. Our results showed sliDRNAs have distinguished composition from siRNA with DNA nts (siDRNA), indicated that, in addition to their different biogenesis mechanisms, these two types of RNAi triggers may also have adopted additional different silencing mechanisms. Our results also revealed some mechanism related to how Ago2 executes its slicer activity and the effects on sliRNA potency by trimming and tailing during sliRNA maturation. These results have paved the way for using other chemically modified nts in sliRNAs that may enhance their in vivo stability and transportability to facilitate their in vivo applications.

molecular biology↗

Hijacking Cellular S-Acylation with Molecular Assemblies Rewires Oncogenic Signaling

KRAS-mutant cancers are generally treated by suppressing oncogenic signaling. Here, we investigated whether endogenous lipidation machinery could instead be used to spatially perturb that signaling. The thioester-bearing peptide precursor Stb-DPhe-DPhe-SAc (1) potently reduced PANC-1 cell viability and formed a palmitoylated product in treated cells. Synthetic palmitoylated 1 displayed increased assembly propensity, while fluorescent analogue 2 accumulated at the Golgi in a 2-bromopalmitate-sensitive manner. Compound 1 increased plasma-membrane-associated KRAS staining and ERK/AKT phosphorylation and induced pronounced LC3B and p62 remodeling. Inhibition of palmitoylation suppressed Golgi accumulation, attenuated the LC3B response, and rescued cell viability. These findings support a model in which cellular S-acylation drives organelle-localized molecular assembly that perturbs KRAS localization, oncogenic signaling, and associated stress responses. This work identifies endogenous lipidation machinery as a synthetic handle for spatial control of cancer signaling.

molecular biology↗