Cardiac fibroblast proliferation rates and collagen expression mature early in life and do not change with advancing age [RNA-Seq]
Ontology highlight
ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE161078 | GEO | 2020/11/10
REPOSITORIES: GEO
Similar Datasets
Project description:This SuperSeries is composed of the SubSeries listed below.
2020-11-09 | GSE161079 | GEO
Project description:Cardiac fibrosis is a pathophysiologic hallmark of the aging heart. In the uninjured heart, cardiac fibroblasts exist in the quiescent state, but little is known about how proliferation rates and fibroblast transcriptional programs change throughout the lifespan of the organism from the immediate postnatal period to adult life and old age. Using EdU pulse labeling, we demonstrate that more than 50% of cardiac fibroblasts are actively proliferating in the first day of post-natal life. However, within 4 weeks of birth in the juvenile animal, only 10% of cardiac fibroblasts are proliferating. By early adulthood, the fraction of proliferating cardiac fibroblasts further decreases to approximately 2%, where it so remains throughout the rest of the organism’s life span. Examination of absolute cardiac fibroblast numbers demonstrated concordance with age related changes in fibroblast proliferation with no significant differences in absolute cardiac fibroblast numbers between animals 14 weeks and 1.5 years of age. We demonstrate that the maximal changes in cardiac fibroblast transcriptional programs and in particular collagen expression occur within the first weeks of life from the immediate postnatal to the juvenile period. We show that even though the aging heart exhibits an increase in the total amount of accumulated collagen, transcription of various collagens and ECM genes both in the heart and cardiac fibroblast is maximal in the newly born and juvenile animal and decreases with organismal aging. Examination of DNA methylation changes both in the heart and in cardiac fibroblasts did not demonstrate significant changes in differentially methylated regions between young and old mice. Our observations demonstrate that cardiac fibroblasts attain a stable proliferation rate and transcriptional program early in the life span of the organism and suggest a model of cardiac aging where phenotypic changes in the aging heart are not directly attributable to changes in proliferation rate or altered collagen expression in cardiac fibroblasts.
2020-10-26 | GSE160074 | GEO
Project description:Cardiac fibrosis is a pathophysiologic hallmark of the aging heart, but little is known about how fibroblast proliferation and transcriptional programs change throughout the life span of the organism. Using EdU pulse labeling, we demonstrated that more than 50% of cardiac fibroblasts were actively proliferating in the first day of postnatal life. However, by 4 weeks, only 10% of cardiac fibroblasts were proliferating. By early adulthood, the fraction of proliferating cardiac fibroblasts further decreased to approximately 2%, where it remained throughout the rest of the organism's life. We observed that maximal changes in cardiac fibroblast transcriptional programs and, in particular, collagen and ECM gene expression both in the heart and cardiac fibroblast were maximal in the newly born and juvenile animal and decreased with organismal aging. Examination of DNA methylation changes both in the heart and in cardiac fibroblasts did not demonstrate significant changes in differentially methylated regions between young and old mice. Our observations demonstrate that cardiac fibroblasts attain a stable proliferation rate and transcriptional program early in the life span of the organism and suggest that phenotypic changes in the aging heart are not directly attributable to changes in proliferation rate or altered collagen expression in cardiac fibroblasts.
| S-EPMC7819745 | biostudies-literature
Project description:Cardiac fibroblast proliferation rates and collagen expression mature early in life and do not change with advancing age
| PRJNA675487 | ENA
Project description:Cardiac fibroblast proliferation rates and collagen expression mature early in life and do not change with advancing age [RNA-Seq]
| PRJNA675497 | ENA
Project description:Cardiac fibroblast proliferation rates and collagen expression mature early in life and do not change with advancing age [Bisulfite-Seq]
| PRJNA671732 | ENA
Project description:BackgroundThe effect of ageing on total collagen content of human colon has been poorly investigated. The aim of this study was to determine if ageing altered total collagen content and distribution in the human colon.MethodsMacroscopically normal ascending colon was obtained at surgery from cancer patients (n = 31) without diagnosis of diverticular disease or inflammatory bowel disease. Masson's trichrome and Picrosirius red stains were employed to identify the total collagen content and distribution within the sublayers of the colonic wall for adult (22-60 years; 6 males, 6 females) and elderly (70 - 91years; 6 males, 4 female) patients. A hydroxyproline assay evaluated the total collagen concentration for adult (30-64 years; 9 male, 6 female) and elderly (66-91 years; 8 male, 8 female) patients.Key resultsHistological studies showed that the percentage mean intensity of total collagen staining in the mucosa, submucosa and muscularis externa was, respectively, 14(1.9) %, 74(3.2) % and 12(1.5) % in the adult ascending colon. Compared with the adults, the total collagen fibres content was increased in the submucosa (mean intensity; 163.1 ± 11.1 vs. 124.5 ± 7.8; P < 0.05) and muscularis externa (42.5 ± 8.0 vs. 20.6 ± 2.8; P < 0.01) of the elderly patients. There was no change in collagen content of the mucosa. The total collagen concentration was increased in the elderly by 16%. Sex-related differences were not found, and data were combined for analysis.ConclusionsGreater total collagen content was found in the submucosa and muscularis externa of the elderly human male and female colon. These changes may contribute to a possible loss of function with ageing.
| S-EPMC9205511 | biostudies-literature
Project description:We report the mRNA profile of aged mice (24 months old) fed either a control diet or a diet containing Rapamycin (14 ppm) for 3 months. After drug treatement, the hearts of the mice were removed and total mRNA was removed from the tissue. Analysis revealed that there were 700 significantly differentially expressed genes between the control fed group and the Rapamycin diet group by our analysis.
2013-07-01 | GSE48043 | GEO
Project description:Age-related deficits in the immune system have been associated with an increased incidence of infections, autoimmune diseases, and cancer. Human B cell populations change quantitatively and qualitatively in the elderly. However, the function of human B-1 cells, which play critical anti-microbial and housekeeping roles, have not been studied in the older age population. In the present work, we analyzed how the frequency, function and repertoire of human peripheral blood B-1 cells (CD19+CD20+CD27+CD38low/intCD43+) change with age. Our results show that not only the percentage of B-1 cells but also their ability to spontaneously secrete IgM decreased with age. Further, expression levels of the transcription factors XBP-1 and Blimp-1 were significantly lower, while PAX-5, characteristic of non-secreting B cells, was significantly higher, in healthy donors over 65 years (old) as compared to healthy donors between 20 and 45 years (young). To further characterize the B-1 cell population in older individuals, we performed single cell sequencing analysis of IgM heavy chains from healthy young and old donors. We found reduced repertoire diversity of IgM antibodies in B-1 cells from older donors as well as differences in usage of certain VH and DH specific genes, as compared to younger. Overall, our results show impairment of the human B-1 cell population with advancing age, which might impact the quality of life and onset of disease within the elderly population.
| S-EPMC6433875 | biostudies-literature
Project description:We report the mRNA profile of aged mice (24 months old) fed either a control diet or a diet containing Rapamycin (14 ppm) for 3 months. After drug treatement, the hearts of the mice were removed and total mRNA was removed from the tissue. Analysis revealed that there were 700 significantly differentially expressed genes between the control fed group and the Rapamycin diet group by our analysis. Heart tissue samples from age-matched control mice (n=10) and rapamycin fed mice (n=10) were extracted for total RNA. The samples were sequenced using Illumina HiSeq 2000 (50 basepair paired-end sequencing). The sequencing yielded quality scores greater than 30 with an average of 10 million reads per sample. 34,293 genes were mapped back to the MGSCv37 C57BL/6J mouse genome (maximum paired distance=300 and minimum=130, minimum number of reads per mapping = 5, maximum number of mismatches= 2, with the reads being mapped to unique sites in the genome).
2013-07-01 | E-GEOD-48043 | biostudies-arrayexpress