Project description:To characterize the molecular diversity of olfactory bulb projection neurons we used viral targeting and Fluorescence Activated Nuclei Sorting (FANS) to enrich for olfactory bulb projection neurons, and single-nuclei RNA sequencing (sn-RNA seq) to comprehensively characterize their transcriptomes. To isolate GFP-labelled nuclei, 3 individual replicates of AON and PCx-injected mice were used. Ipsilateral and controlateral sides were minced separately and placed into two different tubes. The minced tissue was gently homogenized in Nuclei PURE Lysis Buffer and 10% Triton X-100 using an ice-cold dounce and pestle, and filtered two times through a 40 μm cell strainer on ice. After centrifuging at 500 rpm for 5 min at 4 °C, the supernatant was aspirated and gently resuspended in 500 μl of cold buffer (1x of cold Hanks' Balanced Salt Solution HBSS, 1% nuclease-free BSA, RNasin Plus and 1/2000 DRAQ5). Our study identifies molecularly distinct subtypes of mitral and tufted cells.
Project description:To characterize the molecular diversity of olfactory bulb projection neurons we used viral targeting and Fluorescence Activated Nuclei Sorting (FANS) to enrich for piriform cortex-projecting or AON-projecting neurons, and bulk RNA deep sequencing (bulk RNA deep seq) to comprehensively characterize their transcriptomes.
Project description:To validate different projection targets of already molecularly-defined olfactory bulb projection neurons we used viral targeting specifically into anterior or posterior cortical areas, Fluorescence Activated Nuclei Sorting (FANS) to enrich for olfactory bulb projection neurons, and single-nuclei RNA sequencing (sn-RNA seq) To isolate GFP-labelled nuclei, 1 individual replicate of AON or PCx-injected mice was used. Ipsilateral and controlateral sides were minced separately and placed into two different tubes. The minced tissue was gently homogenized in Nuclei PURE Lysis Buffer and 10% Triton X-100 using an ice-cold dounce and pestle, and filtered two times through a 40 μm cell strainer on ice. After centrifuging at 500 rpm for 5 min at 4 °C, the supernatant was aspirated and gently resuspended in 500 μl of cold buffer (1x of cold Hanks' Balanced Salt Solution HBSS, 1% nuclease-free BSA, RNasin Plus and 1/2000 DRAQ5). Our study identifies molecularly distinct subtypes of mitral cells projecting to anterior or posterior olfactory cortices.
Project description:The effects of chronic olfactory inflammation on the olfactory bulb (OB) were examined. Inflammation was induced in the olfactory epithelium by repeated unilateral intranasal administration of lipopolysaccharide (LPS). After 4 weeks, gene expression profiles were compared between ipislateral and contralateral OBs using RNA sequencing analysis.
Project description:Here we performed single cell RNA sequencing of manually sorted olfactory bulb dopaminergic neurons with the goal of studying the transcriptomic basis of neuronal plasticity. Acute olfactory bulb 300 µm slices were obtained from Dat-Cre/Flox-tdTomato (B6.SJL-Slc6a3tm1.1(cre) Bkmn/J, Jax stock 006660 / B6.Cg– Gt(ROSA)26Sortm9(CAG-tdTomato)Hze, Jax stock 007909) juvenile mice. Single cell suspensions were generated using the Neural Tissue Dissociation Kit – Postnatal Neurons (Miltenyi Biotec. Cat no. 130-094-802). Dopaminergic neurons were identified by red fluorescence and manually sorted into individual wells. Analysis of the effects of the transcriptomic changes relating to neuronal plasticity triggered by sensory deprivation is ongoing.