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Series GSE22308 Query DataSets for GSE22308
Status Public on Jul 15, 2010
Title Circadian expression profiling of purified clock neurons in adult Drosophila
Organism Drosophila melanogaster
Experiment type Expression profiling by array
Summary To compare circadian gene expression within highly discrete neuronal populations, we separately purified and characterized two adjacent but distinct groups of Drosophila adult circadian neurons: the 8 small and 10 large PDF (pigment-dispersing factor)-expressing ventral lateral neurons (s-LNvs and l-LNvs, respectively). The s-LNvs are the principal circadian pacemaker cells, whereas recent evidence indicates that the l-LNvs are involved in sleep and light-mediated arousal. Although half of the l-LNv-enriched mRNA population including core clock mRNAs is shared between the l-LNvs and s-LNvs, the other half is l-LNv- and s-LNv specific. The distribution of four specific mRNAs is consistent with prior characterization of the four encoded proteins and therefore indicates successful purification of the two neuronal types. Moreover, an octopamine receptor mRNA is selectively enriched in l-LNvs, and only these neurons respond to in vitro application of octopamine. Dissection and purification of l-LNvs from flies collected at different times indicate that these neurons contain cycling clock mRNAs with higher circadian amplitudes as well as at least a 10-fold higher fraction of oscillating mRNAs than all previous analyses of head RNA. Many of these cycling l-LNv mRNAs are well-expressed but do not cycle or cycle much less well elsewhere in heads. The results suggest that RNA cycling is much more prominent in circadian neurons than elsewhere in heads and may be particularly important for the functioning of these neurons.
 
Overall design Gene expression was profiled in purified large PDF neurons across 4 time-points and small PDF neurons at two time-points under an LD cycle.
Circadian neurons (PDF large and small cells), general neurons (ELAV) and per01:large PDF cells were labeled by GFP using specfic drivers. Expression of these cells types were profiled after manual cell sorting of GFP-positive cells at different time-points under a light/dark (LD) cycle. The time-points included ZT0, ZT6, ZT12, and ZT18 in the case of large PDF cells, and ZT0 and ZT12 in the case of small PDF cells, ELAV cells and per01:large PDF cells. 3 biological replicates were collected for the large PDF cells and ELAV cells at ZT0 and ZT12. 2 replicates were collected for large PDF cells at ZT6 and ZT18, small PDF cells, and per01:large PDF cells.
 
Contributor(s) Kula-Eversole E, Nagoshi E
Citation(s) 20624977
Submission date Jun 11, 2010
Last update date Aug 28, 2018
Contact name Elzbieta Kula-Eversole
E-mail(s) e-kula-eversole@northwestern.edu
Organization name Northwestern University
Department NBP
Street address 2205 Tech Drive
City Evanston
State/province IL
ZIP/Postal code 60208
Country USA
 
Platforms (1)
GPL1322 [Drosophila_2] Affymetrix Drosophila Genome 2.0 Array
Samples (24)
GSM555213 ELAV cells from adult ZT12, biological replicate 1
GSM555214 ELAV cells from adult ZT12, biological replicate 2
GSM555215 ELAV cells from adult ZT12, biological replicate 3
Relations
BioProject PRJNA127387

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Supplementary file Size Download File type/resource
GSE22308_RAW.tar 41.9 Mb (http)(custom) TAR (of CEL)
Processed data included within Sample table
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