RNA profiles of rat olfactory epithelia : individual and age related variations
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ABSTRACT:
PROVIDER: PRJNA115357 | ENA |
REPOSITORIES: ENA
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Project description:Background: Mammalian genomes contain a large number (~1000) of olfactory receptor (OR) genes, many of which (20 to 50 %) are pseudogenes. OR gene transcription is not restricted to the olfactory epithelium, but is found in numerous tissues. Using microarray hybridization and RTqPCR, we analyzed the mRNA profiles of the olfactory epithelium of male and female Brown Norway rats of different origins and ages (newborn, adult and old). Results: (1) We observed very little difference between males and females and between rats from two different suppliers. (2) Different OR genes were expressed at varying levels, rather than uniformly across the four endoturbinates. (3) A large proportion of the gene transcripts (2/3 of all probes) were detected in all three age groups. Adult and older rats expressed similar numbers of OR genes, both expressing more OR genes than newborns. (4) Comparisons of whole transcriptomes or transcription profiles of expressed OR genes only showed a clear clustering of the samples as a function of age. (5) Most OR genes were expressed at lower levels at birth than in older animals, but a small number of OR genes were expressed specifically or were overexpressed in newborns. Conclusions: Not all OR genes are expressed at a detectable level. Pups expressed fewer OR genes than adult rats, and generally at a lower level; however, a small subset of OR genes were more strongly expressed in these newborn rats. The reasons for these differences are not understood. However, the specific expression of some OR genes in newborn olfactory epithelia may be related to the blindness and deafness of pups at birth, when these pups are heavily reliant on olfaction and their mother.
2009-11-01 | GSE15953 | GEO
Project description:Background: Mammalian genomes contain a large number (~1000) of olfactory receptor (OR) genes, many of which (20 to 50 %) are pseudogenes. OR gene transcription is not restricted to the olfactory epithelium, but is found in numerous tissues. Using microarray hybridization and RTqPCR, we analyzed the mRNA profiles of the olfactory epithelium of male and female Brown Norway rats of different origins and ages (newborn, adult and old). Results: (1) We observed very little difference between males and females and between rats from two different suppliers. (2) Different OR genes were expressed at varying levels, rather than uniformly across the four endoturbinates. (3) A large proportion of the gene transcripts (2/3 of all probes) were detected in all three age groups. Adult and older rats expressed similar numbers of OR genes, both expressing more OR genes than newborns. (4) Comparisons of whole transcriptomes or transcription profiles of expressed OR genes only showed a clear clustering of the samples as a function of age. (5) Most OR genes were expressed at lower levels at birth than in older animals, but a small number of OR genes were expressed specifically or were overexpressed in newborns. Conclusions: Not all OR genes are expressed at a detectable level. Pups expressed fewer OR genes than adult rats, and generally at a lower level; however, a small subset of OR genes were more strongly expressed in these newborn rats. The reasons for these differences are not understood. However, the specific expression of some OR genes in newborn olfactory epithelia may be related to the blindness and deafness of pups at birth, when these pups are heavily reliant on olfaction and their mother.
2009-11-01 | GSE15952 | GEO
Project description:BACKGROUND: Mammalian genomes contain a large number (approximately 1000) of olfactory receptor (OR) genes, many of which (20 to 50%) are pseudogenes. OR gene transcription is not restricted to the olfactory epithelium, but is found in numerous tissues. Using microarray hybridization and RTqPCR, we analyzed the mRNA profiles of the olfactory epithelium of male and female Brown Norway rats of different origins and ages (newborn, adult and old). RESULTS: (1) We observed very little difference between males and females and between rats from two different suppliers. (2) Different OR genes were expressed at varying levels, rather than uniformly across the four endoturbinates. (3) A large proportion of the gene transcripts (2/3 of all probes) were detected in all three age groups. Adult and older rats expressed similar numbers of OR genes, both expressing more OR genes than newborns. (4) Comparisons of whole transcriptomes or transcription profiles of expressed OR genes only showed a clear clustering of the samples as a function of age. (5) Most OR genes were expressed at lower levels at birth than in older animals, but a small number of OR genes were expressed specifically or were overexpressed in newborns. CONCLUSION: Not all OR genes are expressed at a detectable level. Pups expressed fewer OR genes than adult rats, and generally at a lower level; however, a small subset of OR genes were more strongly expressed in these newborn rats. The reasons for these differences are not understood. However, the specific expression of some OR genes in newborn olfactory epithelia may be related to the blindness and deafness of pups at birth, when these pups are heavily reliant on olfaction and their mother.
| S-EPMC2797534 | biostudies-literature
Project description:This SuperSeries is composed of the SubSeries listed below.
2009-11-01 | GSE15954 | GEO
Project description:Single cell RNA-Seq experiment was conducted using mouse olfactory epithelia at E18.5, P14, and adult stage to study the gene expression in different cell types, including olfactory sensory neurons and their progenitor cells.
2022-08-29 | GSE147461 | GEO
Project description:A series of RNA-Seq experiment were conducted to study the transcriptome changes of olfactory sensory neurons during the critical period. We conducted RNA-seq of the olfactory epithelia at P0, P3, P7, P14, and P21 to identify the gene expression changes in the olfactory epithelia. We also performed RNA-Seq experiment of the olfactory epithelia from Kir2.1 transgenic mice at the same time points to understand the effect of neural activity deprivation on the transcriptome.
2022-08-29 | GSE147459 | GEO
Project description:KLF7 null mice show profound axonal growth defects in the olfactory epithelium. The goal of this study was the identification of potential KLF7 target genes in olfactory sensory neurons. Experiment Overall Design: Olfactory epithelia were isolated from 3 wildtype and 3 mutant 1 day old pups and the RNA isolated, labeled and hybridized to one chip each.
2007-12-01 | E-GEOD-3595 | biostudies-arrayexpress
Project description:This experiment studies the gene expression in the mature olfactory sensory neurons and the intermidiate neuronal progenitors in the olfactory epithelia during the critical period. Mature olfactory sensory neurons from OMP-GFP mice and intermediate neuronal progenitors in the olfactory epithelia from Neurog1-GFP mice were FACS purified. PolyA RNA profiles at P2, P3, P7, P9, and P16 were generated by RNA-Seq.
2022-08-29 | GSE147460 | GEO
Project description:RNA profiles of rat olfactory epithelia : individual and age related variations (age experiment)
| PRJNA123079 | ENA
Project description:RNA profiles of rat olfactory epithelia : individual and age related variations (gender/supplier experiment)
| PRJNA123077 | ENA