Project description:The immune responses to SARS-CoV-2 infections are very complex and remain to be further characterized. In this study, we performed the single-cell B-cell receptor (BCR) sequencing (scBCR-seq) of the PBMC samples from the healthy controls and SARS-CoV-2 infected individuals with various clinical presentations, and subsequently analyzed the abundance, diversity and difference of BCR repertoire in different groups of COVID-19 patients and the healthy controls, respectively. We identified a number of unique heavy or light chain VDJ genes pairs and combinational preference in each group, such as IGKV3-7 enriched in the asymptomatic subjects, whereas IGHV3-23-IGHJ4, IGHV1-18–IGLV3-19, IGHV1-18–IGLV3-21, and IGHV1-1–IGLV3-25 enriched in the recovery patients from the severe diseases. These findings may advance our understanding of the B-cell mediated immune responses to SARS-CoV-2 infections and help develop novel vaccine candidates and therapeutic antibodies against COVID-19.
Project description:<p>We developed an improved high throughput sequencing approach to measure the quantities and sequences of the repertoire of antibody heavy chain RNA in a blood sample. Using this approach we analyzed the antibody repertoire in response to yearly vaccinations with influenza vaccines TIV and LAIV in healthy adults in two subsequent years. We determined vaccine response patterns specific to LAIV and TIV and found antibody sequences that were shared between two samples of the same individuals following influenza vaccination in subsequent years, thereby providing a genetic measurement of B-cell memory recall.</p>
Project description:microRNAs were profiled in healthy controls, classic celiac patients (CD), CD patients with anemia and GFD treated CD with normalization of duodenal mucosa
Project description:Aim: To compare the overall transcriptional profile in healthy controls and celiac disease patients. This dataset, was used to evaluate if our in vitro model (intestinal intraepithelial lymphocytes, desccribed in doi:10.1016/j.jaut.2020.10242 ) is representative of the transcriptional profile in the intestine under healthy or inflammatory conditions. Samples: Upper colonoscopy biopsies from 5 control and 11 celiac disease patients were taken, total RNA was extracted and RNA-sequencing was performed (without replicates)
Project description:microRNAs were profiled in healthy controls, classic celiac patients (CD), CD patients with anemia and GFD treated CD with normalization of duodenal mucosa all CD conditions were related to controls. For each group, five patients were pooled. One replicate per experiment
Project description:Paired immunoglobulin heavy and light chain sequences were obtained from 803 single IgA plasma cells isolated from duodenal biopsies of five celiac disease patients. The cells were specific to discrete antigenic regions of the enzyme TG2, which is the main autoantigen in celiac disease.
Project description:Based on the findings of increased IEL in duodenal biopsies in CVID, an overlap with celiac disease has been suggested. In the present study, increased IEL, in particular in the pars descendens of the duodenum, was one of the most frequent histopathological finding. We therefore examined the gene expression profile in pars descendens of duodenum in CVID patients with increased IEL (n=13, IEL mean 34 [range 22-56] IEL/100 EC), CVID with normal levels of IEL (n=7), celiac disease (n=10, Marsh grade 3a or above) and healthy controls (n=17) by gene expression microarray GI histopathological findings in 53 CVID patients that underwent upper and lower endoscopic examination were addressed. For the microarray analysis 20 CVID (7 CVID_normal and 13 CVID with incresed IEL), 10 patients with celiac diseases and 17 healthy controls were included.