Project description:Systematic characterizations of adipose Treg subsets and their in vivo roles remain uncommon. The goal of this study is to reveal the heterogeneity and chromatin landscape of adipose Treg cells. Using single-cell ATAC-seq to map adipose Treg cells, we identified different adipose subsets. Strikingly, our scATAC-seq analysis revealed a strong enrichment of key transcription factor motifs, which may play function in fate specification. By gain and loss of function studies, we further demonstrated adipose Treg subsets display disparate physiologic influences. Our findings have important implications for understanding phenotypic diversity of tissue Tregs in vivo.
Project description:Systematic characterizations of adipose Treg subsets and their in vivo roles remain uncommon. Using paired single-cell RNA-seq and TCR-seq to map adipose Treg cells, we identified conserved adipose subsets with distinct clonal expansion patterns. By gain and loss of function studies, we demonstrated adipose Treg subsets display disparate influences. To understand the clonal structure of adipose Treg cells, we analyzed their TCR sharing data and observed a number of overlapped TCR clonotypes, suggesting a cellular state transition between adipose Treg clusters. Our findings have important implications for understanding phenotypic diversity of tissue Tregs in vivo.
Project description:The goal of this study is to reveal unique features of adipose Tregs and to study mechanisms underlying how mediator Med23 regulate adipose Treg function in aged mice. Therefore, mRNA profiles of LN Tregs (from 4-month old Foxp3Cre mice) and adipose Tregs (from 4-month old Foxp3Cre, 4-month old obese Foxp3Cre, 10-month old Foxp3Cre and 10-month old Med23fl/fl;Foxp3Cre mice) were generated by deep sequencing, single experiment, using Illumina HiSeq2000. We compared transcriptome features between lymph node-derived Tregs and adipose Tregs from 4-month old lean or obese mice. Using unbiased comparative gene expression analyses, we found adipose Tregs display an up-signature of Insr (Insulin receptor) and Hif1a, while Pparg acts as a positive control. We next compared gene expression profiles of adipose Tregs from 10-month old Med23fl/fl;Foxp3Cre (MKO) and Foxp3Cre (WT) mice. adipose Med23-ΔTreg cells display impaired transcription of Pparg and Il1rl1 (ST2), and they simultaneously acquire the expression of Nt5e (CD73), while Entpd1 (CD39) expression was not dramatically altered. Our studies implicate protective roles of CD73hi adipose Tregs and offer new therapeutic strategies against age-associated metabolic syndrome.
Project description:We have performed single-cell RNA sequencing to investigate human regulatory T cell development in the thymus. Treg cells were isolated from a postnatal thymus derived from a 7-week old infant. We examined the composition of the Treg cell compartment in the human thymus and aimed to dissect developmental pathways in Treg cell development.
Project description:Single cell ATAC-seq (scATAC-seq) was performed on macaque embryonic stem cell-derived cerebral organoids. scATAC-seq was performed on day 60 (2 months old cerebral organoid).
Project description:Purpose: identify differentially expressed genes between ex-Treg obtained 5, 10 or 15 days post-adoptive transfer into a lymphopenic environment compared to ex vivo Treg in order to identify Treg subset with heightened instability. Method: Treg from Foxp3YFP-Cre Rosa26RFP (PMID: 18387831, PMID: 17171761) were co-injected with congenically-disparated naive T cells in a 1:1 ratio into Rag1KO mice and ex-Treg were sorted at 15 days, 10 days or 5 days post-transfer. As a control, ex vivo Treg were sorted from Foxp3YFP-Cre Rosa26RFP (d0 sample). Next, samples were stained with multiplexing antibodies using the BD Single-Cell Multiplexing Kit (BD biosciences), then pooled and stained with the following oligonucleotide-conjugated antibodies: anti‑CD25 (PC61), anti-CD44 (IM7), anti-CD62L (MEL-14), anti-GITR (DTA-1), anti-CD4 (RM4-5), anti‑TCRb (H57-597), anti‑CD69 (H1.2F3), anti‑TIGIT (1G9), anti‑CD95 (Jo2), anti‑CD122 (TM‑1β), anti‑Tim-3 (5D12), anti‑CCR7 (4B12), anti‑CD103 (M290), anti‑CD279 (J43), anti‑CD274 (MIH5), anti‑CD233 (C9B7W), anti‑CD71 (C2), anti‑CD278 (7E7G9), anti‑ITGB7 (M293), anti‑CD137 (1AH2), anti‑CD40 (3/23), anti‑CD3e (145-2C) from BD Biosciences. Single-cell capture and cDNA library preparation was performed using the BD Rhapsody Single-cell analysis system (BD Biosciences), according to the manufacturer’s instructions, using a custom gene panel (591 genes). Sequencing was performed on an Illumina NextSeq500 instrument using a Mid‑Output kit v2.5 (150 cycles, paired-end). Sample demultiplexing, barcode processing, alignment, filtering, UMI counting were done using the standard BD Biosciences Rhapsody analysis pipeline on Seven Bridges (www.sevenbridges.com). Result: In this study, we showed that ex-Treg downregulate Treg core-specific genes immediatly upon adoptive transfer into a lymphopenic environment. Further, we identified a Treg population enriched for unstable Trg clones. Conclusion: Our study was able to identify a Treg subset enriched for unstable Treg with plastic potential. This Treg subset appears highly enriched for naïve peripheral-induced Treg.
Project description:Single cell ATAC-seq (scATAC-seq) was performed on bonobo induced pluripotent stem cells (iPSC) derived cerebral organoids. scATAC-seq was performed on day 60 (2 months old cerebral organoid) and day 120 (4 months old cerebral organoid).