RGD Reference Report - Gene regulation of melatonin and dopamine receptors during eye development. - Rat Genome Database

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Gene regulation of melatonin and dopamine receptors during eye development.

Authors: Fujieda, H  Scher, J  Lukita-Atmadja, W  Brown, GM 
Citation: Fujieda H, etal., Neuroscience. 2003;120(2):301-7.
RGD ID: 9588674
Pubmed: PMID:12890503   (View Abstract at PubMed)

To gain insight into the role of melatonin and dopamine in retinal development, gene expression of two melatonin receptors, MT1 and MT2, as well as five dopamine receptors, D1, D2, D3, D4 and D5, in the rat eye was analyzed by reverse transcription-polymerase chain reaction across various developmental stages. MT1 transcript levels reached maximum levels at embryonic day (E) 16 and then decreased gradually until reaching adult levels by postnatal day (P) 14. MT2 transcript levels similarly peaked at E16, but then decreased dramatically until birth to its lowest levels, which were maintained throughout the postnatal period. Thus, gene expression of both the MT1 and MT2 receptors showed a striking inverse correlation with maturation of the eye. In contrast to melatonin receptors, gene expression of all dopamine receptor subtypes, except for D3, showed only an increase as development proceeds with highest levels in adulthood. The D3 message was not detected throughout the developmental period examined. Gene expression of D1-like receptors, D1 and D5, showed a substantial increase to adult levels during the fetal period at E16 and E20, respectively. Transcript levels of D2-like receptors, D2 and D4, on the other hand, were not detected before birth but increased significantly to adult levels by P7 and P14, respectively. The present findings suggest the presence of unique developmental mechanisms by which transcription of various G protein-coupled receptors are regulated in the eye.

Gene Ontology Annotations    Click to see Annotation Detail View

Biological Process
TermQualifierEvidenceWithReferenceNotesSourceOriginal Reference(s)
camera-type eye development  IEP 9588674; 9588674 RGD 

Objects Annotated

Genes (Rattus norvegicus)
Mtnr1a  (melatonin receptor 1A)
Mtnr1b  (melatonin receptor 1B)


Additional Information