Project description:RNA was extracted from whole blood of subjects collected in Tempus tubes. We performed gene expression analysis of dengue seropositive versus dengue seronegative subjects from Singapore.
Project description:Single cell RNA-seq was conducted on peripheral blood mononuclear cells (PBMCs) collected from study participants that were dengue seronegative (n=3) or dengue seropositive (n=3). Baseline single cell gene expression profiling was conducted using 10x Genomics Chromium Next GEM Single Cell 3’ Reagent Kits v3.1 (Dual Index).
Project description:RNA was extracted from whole blood of subjects collected in Tempus tubes. We performed gene expression analysis of dengue seropositive versus dengue seronegative subjects.
Project description:Samples were collected from the DEN210 study, a phase IIb clinical trial evaluating two doses of TAK003, a tetravalent dengue vaccine, administered 90 days apart in healthy adult participants with and without prior DENV infection (NCT03746015). RNA was extracted from whole blood collected in Paxgene tubes from volunteers at Day 1, 4, 6, 90, 94 and 96. Day 1 and Day 90 samples were collected prior to administration of first and second TAK-003 vaccine dose. We performed gene expression analysis in dengue seronegative and seropositive individuals over time.
Project description:SARS-CoV-2 infection ranges from asymptomatic to severe with lingering symptomatology in some. This prompted investigation of whether or not asymptomatic disease results in measurable immune activation post-infection. Immune activation following asymptomatic SARS-CoV-2 infection was characterized through a comparative investigation of the immune cell transcriptomes from 43 asymptomatic seropositive and 52 highly exposed seronegative individuals from the same community four to six weeks following a superspreading event. Few of the 95 individuals had underlying health issues. One seropositive individual reported Cystic Fibrosis and one individual reported Incontinentia pigmenti. No evidence of immune activation was found in asymptomatic seropositive individuals with the exception of the Cystic Fibrosis patient. There were no statistically significant differences in immune transcriptomes between asymptomatic seropositive and highly exposed seronegative individuals. Four positive controls, mildly symptomatic seropositive individuals whose blood was examined three weeks following infection, showed immune activation. Negative controls were four seronegative individuals from neighboring communities without COVID19. All individuals remained in their usual state of health through a five-month follow-up after sample collection. In summary, whole blood transcriptomes identified individual immune profiles within a community population and showed that asymptomatic infection within a super-spreading event was not associated with enduring immunological activation.
Project description:Immune transcriptomes of highly exposed SARS-CoV-2 asymptomatic seropositive versus seronegative individuals from the Ischgl community
Project description:MicroRNAs have emerged as relevant players in resistance to infection. We aimed to identify miRNAs involved in natural resistance to dengue infection. Two groups of people living in dengue endemic area were classified as susceptible (SD) or resistant (RD) to dengue virus (DENV) infection according to their anti-DENV antibody status. We hypothesized that anti-DENV seronegative individuals may represent a population resistant to DENV infection. The miRNome from monocytes of 7 individuals of each group was assessed upon mock- or DENV-2 infection.Dysregulated miRNAs were chosen as candidates for functional studies.
Project description:We used Affymetix HG Focus GeneChip to measure the expression levels of HIV seronegative and seropositive individuals in human PBMCs in vivo. GSM39104 -GSM39115 are HIV seronegative samples; GSM39116-GSM39137 are HIV seropositive but drug naive samples; GSM39138-GSM39147 are HIV seropositive samples used to test serostatus biomarker; GSM39148-GSM39170 are HIV seropositive individuals whose CD4 cells decrease over time; GSM39171-GSM39187 are HIV seropositive individuals whose CD4 cells increase over time; GSM39188-GSM39190 are HIV seropositive samples used to test CD4 cell increase/decrease over time.