Project description:Ribosome profiling on killifish brains coming from adult and old animals. Fractions have been pulled as described in the M&M and analysed by DIA proteomics.
Project description:Proteome DIA analysis of brain tissue from old (32 weeks old) killifish treated for 3 weeks with bortezomib to reduce the proteasome activity or DMSO as control.
Project description:In order to understand molecular basis of cardiac ageing in killifish, we have performed RNA Seq on the ventricular regions of young and aged killifish. Experiment was performed in biological triplicates.
Project description:Aging is a major risk factor for neurodegeneration and is characterized by diverse cellular and molecular hallmarks. To understand their origin, we studied the effects of aging on the transcriptome, translatome, and proteome in the brain of short-lived killifish. We identified a cascade of events in which aberrant translation pausing led to altered abundance of proteins independently of transcriptional regulation. In particular, aging caused increased ribosome stalling and widespread depletion of proteins enriched in basic amino acids. These findings uncover a potential vulnerable point in the aging brain's biology – the biogenesis of basic DNA- and RNA-binding proteins. This vulnerability may represent a unifying principle that connects various aging hallmarks, encompassing genome integrity, proteostasis and the biosynthesis of macromolecules.
Project description:Aging is a major contributor to functional decline of the heart and various cardiovascular diseases. Alterations across different cardiac cell types must be tightly orchestrated during normative aging process that has begun to be mapped at the transcriptional level through single-cell RNA-sequencing. However, current rodent models are limited in their capacity to experimentally test large numbers of candidate differentially expressed genes (DEGs). As an attractive alternative, the African Turquoise Killifish (ATK) promises more efficient genetic studies of cardiac aging because it has the shortest lifespan among vertebrates. Despite its experimental advantages, single-cell transcriptomic studies on cardiac aging in ATK have not yet been conducted. Here, we generated the first scRNA-seq profiles of hearts from young and old GRZ strain ATK and demonstrated changes in cellular composition, gene expression, functional pathways, and intercellular communication during cardiac aging.