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Cancer Cell’s Seven Achilles Heels: Considerations for design of anti-cancer drug combinations.

ABSTRACT: Cancer Cell’s Seven Achilles Heels: Considerations for design of anti-cancer drug combinations.

PROVIDER: PRJNA916505 | ENA |

REPOSITORIES: ENA

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Cancer Cell’s Seven Achilles Heels: Considerations for design of anti-cancer drug combinations.

Project description:Loss of function screens using shRNA and CRISPR are routinely used to identify genes that modulate responses of tumor cells to anti-cancer drugs. Here, by integrating GSEA and CMAP analyses of multiple published shRNA screens, we identified a core set of pathways that affect responses to multiple drugs with diverse mechanisms of action. This suggests that these pathways represent “weak points” or “Achilles heels”, whose mild disturbance should make cancer cells vulnerable to a variety of treatments. These “weak points” include proteasome, protein synthesis, RNA splicing, RNA synthesis, cell cycle, Akt-mTOR, and tight junction-related pathways. Therefore, inhibitors of these pathways are expected to sensitize cancer cells to a variety of drugs. This hypothesis was tested by analyzing the diversity of drugs that synergize with FDA-approved inhibitors of the proteasome, RNA synthesis, and Akt-mTOR pathways. Indeed, the quantitative evaluation indicates that inhibitors of any of these signaling pathways can synergize with a more diverse set of pharmaceuticals, compared to compounds inhibiting targets distinct from the “weak points” pathways. Our findings described here imply that inhibitors of the “weak points” pathways should be considered as primary candidates in a search for synergistic drug combinations. We used microarray to identify genetic interaction partners of 2 drugs

2025-01-06 | GSE221858 | GEO

Expression data from post-natal rat Achilles tendons

Project description:We have compared the gene expression profile of post-natal 1 day and 7 day rat Achilles tendons. Post-natal 1 day and 7 day rat Achilles tendons were collected. Each sample contains at least two individuals. Total RNA was extracted and fragmented biotin-tagged cRNA was hybridized to Rat Genome 230 2.0 Array.

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Experimental and Bioinformatics considerations in cancer application of single cell genomics

Project description:Experimental and Bioinformatics considerations in cancer application of single cell genomics

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Achilles-mediated and sex-specific regulation of circadian mRNA rhythms in Drosophila

Project description:The circadian clock is an evolutionarily conserved mechanism that drives rhythmic expression of downstream genes. The core circadian clock drives the expression of clock-controlled genes either directly or indirectly, which in turn play critical roles in carrying out many rhythmic physiological processes. Nevertheless, the molecular mechanisms by which clock output genes orchestrate rhythmic signals from the brain to peripheral tissues are largely unknown. Here we explored the role of one rhythmic gene, Achilles, in regulating the rhythmic transcriptome in fly heads. Achilles is a clock-controlled gene in Drosophila that encodes a putative RNA-binding protein. Achilles expression is not detectable in core clock neurons using in-situ hybridization, although its expression is found in neurons throughout the fly brain. Together, these observations argue against a role for Achilles in regulating the core clock. To assess its impact on circadian mRNA rhythms, we performed RNA sequencing (RNAseq) to compare the rhythmic transcriptomes of control flies and those with diminished Achilles expression in all neurons. Consistent with previous observations, we observe dramatic upregulation of immune response genes upon knock-down of Achilles. Furthermore, a subset of circadian mRNAs lose their rhythmicity in Achilles knock-down flies, suggesting that a subset of the rhythmic transcriptome is regulated either directly or indirectly by Achilles. These Achilles-mediated rhythms include many genes involved in immune function and neuronal signaling such as Prosap, Nemy and Jhl-21. Comparison of RNAseq data from control flies reveal that only 42.7% of clock-controlled genes in the fly brain are rhythmic in both males and females. As mRNA rhythms of core clock genes are largely invariant between the sexes, this observation suggests that sex-specific mechanisms are an important, and heretofore under-appreciated, regulator of the rhythmic transcriptome.

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Expression data from post-natal rat Achilles tendons

Project description:We have compared the gene expression profile of post-natal 1 day and 7 day rat Achilles tendons.

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Effects of running for 1h on gene expression in Achilles tendon cells of SD rats

Project description:The Achilles tendon is the thickest tendon in the human body, and Achilles tendinopathy is its most prevalent disorder, often considered a consequence of overuse. While disruption to the collagen fibers represents a significant manifestation of Achilles tendinopathy, strikingly little is known about the mechanisms by which healthy tendon accumulates damage in vivo.As existing studies of tendon biomechanics and mechanobiology predominantly relied on in vitro or ex vivo experiments on isolated tissues, it is still largely unknown whether and how disruptions occur to the collagen molecules in healthy Achilles tendons following physiological activities. We reported the first RNA-seq analysis reflecting transcriptome changes in healthy rat Achilles tendons following running, providing a resource for future investigations in tendon mechanobiology and sports medicine.

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Single cell transcriptional atlas of mouse Achilles tendons

Project description:We report a single cell transcriptome atlas of Achilles tendon from 6-week-old male C57Bl/6 mice using single cell RNA sequencing.

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Morpho achilles isolate:FG21_008

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Gene expression in Achilles tendon cells of SD rats after 1 h of running followed by 12 h of rest

Project description:Achilles tendinopathy is often thought to be a consequence of overuse of the Cells within the Achilles tendon of healthy rats undergo a series of changes following physiologic levels of mechanical stimulation after running, and we further explored the transcriptome changes in Achilles tendon cells during post-exercise recovery. Our current experiment reveals RNA-seq analysis of the transcriptome of the rat Achilles tendon after 12 hours of rest following running.

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Achilles is a circadian clock controlled gene that regulates innate immune function in Drosophila

Project description:RNAseq transcriptional profiling of Drosophila heads from Achilles RNAi or control animals

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