Transcriptomic analysis of the exit from dormancy of Aspergillus fumigatus conidia.
BMC Genomics
; 9: 417, 2008 Sep 16.
Article
in En
| MEDLINE
| ID: mdl-18796135
ABSTRACT
BACKGROUND:
Establishment of aspergillosis is depending upon the exit from dormancy and germination of the conidia of Aspergillus fumigatus in the lung. To gain an understanding of the molecular mechanisms underlying the early steps of conidial germination, we undertook a transcriptomic analysis using macroarrays constructed with PCR fragments from > 3,000 genes (around one third of the annotated A. fumigatus genome).RESULTS:
Major results of this analysis are the following (i) conidia stored pre-packaged mRNAs transcripts (27% of genes have transcripts in the resting conidia; (ii) incubation at 37 degrees C in a nutritive medium induced up- and down-regulation of genes 19% of the total number of genes deposited on the array were up-regulated whereas 22% of the genes with pre-packaged mRNA in the resting conidia were down-regulated; (iii) most modifications were seen during the first 30 min of germination whereas very little modification of gene expression occurred during the following hour; (iv) one-year old conidia and one-week old conidia behaved similarly at transcriptional level.CONCLUSION:
Transcriptomic data indicate that the exit from dormancy is associated with a shift from a fermentative metabolism to a respiratory metabolism as well as a trend toward immediate protein synthesis.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Aspergillus fumigatus
/
Gene Expression Profiling
Language:
En
Journal:
BMC Genomics
Journal subject:
GENETICA
Year:
2008
Document type:
Article
Affiliation country:
France