Project description:Varicella-zoster virus (VZV), an alphaherpesvirus, causes chickenpox (varicella) in young children with an annual minimum of 140 million new cases and herpes zoster in senior, a painful and debilitating disease with 3-5‰ incidence. A complex structural transcriptome of VZV, which numerous novel transcripts, transcript isoforms, and unknown splice events are found during cell infection. Circular RNA (circRNA), a newly important component of the transcriptome, is increasing discoveries of circRNA function in mammalian cells. However, VZV encoded circRNA remains unexplored. The code used in this study and extended data are available from the GitHub repository (https://github.com/ShaominYang/VZV_circRNA)
Project description:Age-related hearing loss is a multifactorial and progressive process, which negatively impacts quality of life in many senior adults as the number one chronic neurodegenerative condition. This study was done to examine gene expression changes occurring in mouse auditory nerve and cochlear lateral wall tissues that may contribute to age-related hearing loss. In addition to conducting general differential expression analysis, a focused analysis of genes linked to neural cells was done.
2020-10-31 | GSE121856 | GEO
Project description:Senior canine's fecal microbiota compositional changes due to probiotics administration
Project description:Varicella-zoster virus (VZV), an alphaherpesvirus, causes chickenpox (varicella) in young children with an annual minimum of 140 million new cases and herpes zoster in senior, a painful and debilitating disease with 3-5‰ incidence. A complex structural transcriptome of VZV, which numerous novel transcripts, transcript isoforms, and unknown splice events are found during cell infection. Circular RNA (circRNA), a newly important component of the transcriptome, is increasing discoveries of circRNA function in mammalian cells. However, VZV encoded circRNA remains unexplored. In this study we demonstration that VZV derived circRNAs are biologically functional and contributed to viral pathogenesis. Using deep RNA-seq following RNase R treatment, we identified and charactered 35, 076 and 54 human and VZV pOka strain circRNAs respectively from VZV infected neuroblastoma cell (SH-SY5Y).
Project description:Aging alters gastrointestinal morphology, microbiota, and functionality, and is associated with increased incidence of intestinal disease. The mechanisms that contribute to these changes are poorly described. Gene expression in dogs has been evaluated for a few select genes under pathogenic or varying dietary conditions, but global gene expression profiles of aged versus young adult dogs have not been compared previously. Thus, we used canine microarrays to compare gene expression profiles of colonic epithelial tissue from geriatric and young adult dogs fed 2 different diets. Colon tissue samples were collected from 6 geriatric (12 yr-old) and 6 young adult (1 yr-old) female beagles after being fed one of two diets (animal protein-based versus plant-protein based) for 12 months. RNA samples were hybridized to Affymetrix GeneChip Canine Genome Arrays. Statistical analyses indicated that age had the greatest impact on gene expression, with 212 genes differentially expressed in geriatric dogs. Although not as robust as age, diet affected mRNA abundance of 66 genes. The effect of age was most notable, with increased expression in genes related to inflammation, stress response, cellular metabolism and cell proliferation and decreased expression in genes associated with apoptosis and defense mechanism in senior dogs. The effect of diet on gene expression was not consistent, but appeared to have a greater response in senior dogs.
Project description:Women that underwent operation for what was expected to be epithelial ovarian cancer at Odense University Hospital, Denmark, from April 2004 to February 2005, were consecutively asked to participate in the study, and all gave written consent. In the operating theatre the tumors were removed as an entirety, and immediately transported to the pathology department without fixation. One senior pathologist was responsible for collection of samples. From each tumor three samples of about 200 300 mg each were taken with maximal mutual distance, taking into consideration that all samples should contain tumor tissue. This way of sampling was done without any kind of magnification and is mentioned as macro-dissection. The three samples were given the letters a, b and c. The three samples from each of the nine tumors are compared.
Project description:Canine cognitive dysfunction syndrome (CCDS) is a progressive neurodegenerative disorder found in senior dogs. Due to the lack of biological markers, CCDS is commonly underdiagnosed. The aim of this study was to identify potential plasma biomarkers using proteomics techniques and to increase our understanding of the pathogenic mechanism of the disease. Plasma amyloid beta 42 (Aβ42) has been seen to be a controversial biomarker for CCDS. Proteomics analysis was performed for protein identification and quantification. The nano-LC-MS/MS data revealed that the predictive underlying mechanism of CCDS was the co-occurrence of inflammation-mediated acute phase response proteins and complement and coagulation cascades that partly functioned by apolipoproteins and lipid metabolism. Some of the differentially expressed proteins may serve as potential predictor biomarkers along with Aβ42 in plasma for improved CCDS diagnosis.