Endocrine-dependent expression of circadian clock genes in insects

Current models state that insect peripheral oscillators are directly responsive to light, while mammalian peripheral clock genes are coordinated by a master clock in the brain via intermediate factors, possibly hormonal. We show that the expression levels of two circadian clock genes, period (per) a...

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Bibliographic Details
Published in:Cellular and molecular life sciences : CMLS 2008-03, Vol.65 (6), p.964-969
Main Authors: Dolezel, D, Zdechovanova, L, Sauman, I, Hodkova, M
Format: Article
Language:English
Subjects:
Animals
Basic-Leucine Zipper Transcription Factors - genetics
Biochemistry
Biological clocks
Biomedical and Life Sciences
Biomedicine
Cell Biology
Circadian Rhythm
Circadian rhythms
Clock gene
CLOCK Proteins
Corpora allata
endocrine gland
Endocrine glands
Endocrine System
Entomology
Female
Gene expression
Gene Expression Regulation - genetics
Genes
Genetics
Heteroptera - genetics
Insects
Juvenile hormones
Life Sciences
Nuclear Proteins - genetics
Pdp1 gene
Period Circadian Proteins
Period gene
Photoperiodicity
photoperiodism
Pyrrhocoris apterus
Research Article
Trans-Activators - genetics
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Summary:Current models state that insect peripheral oscillators are directly responsive to light, while mammalian peripheral clock genes are coordinated by a master clock in the brain via intermediate factors, possibly hormonal. We show that the expression levels of two circadian clock genes, period (per) and Par Domain Protein 1 (Pdp1) in the peripheral tissue of an insect model species, the linden bug Pyrrhocoris apterus, are inversely affected by contrasting photoperiods. The effect of photoperiod on per and Pdp1 mRNA levels was found to be mediated by the corpus allatum, an endocrine gland producing juvenile hormone. Our results provide the first experimental evidence for the effect of an endocrine gland on circadian clock gene expression in insects.
ISSN:1420-682X
1420-9071
DOI:10.1007/s00018-008-7506-7