Dopamine signaling in Caenorhabditis elegans-potential for parkinsonism research

Parkinsonism & Related Disorders
R F. Wintle, H H.M. Van Tol

Abstract

The nematode Caenorhabditis elegans is an attractive model system for the study of many biological processes. It possesses a simple nervous system with known anatomy and connectivity, is conveniently and cheaply cultured in the laboratory, and is amenable to many genetic manipulations that are impossible in mammalian systems. The recent completion of the C. elegans genome sequence provides a rich resource of genomic and bioinformatic data to researchers in diverse fields. This organism, however, has been underexploited in the studies of many basic processes related to nervous system function, neuropsychiatric disorders and neuromuscular function. Anatomical, biochemical, behavioral, pharmacological and genetic evidence accumulated to date strongly suggests that dopamine is used as a neurotransmitter by C. elegans, and that its effects are mediated through pathway(s) that share many features with those of mammals. DNA sequence analysis reveals genes highly homologous to those encoding mammalian dopamine receptors. Probably, C. elegans has dopamine receptors that transduce environmental cues into behaviors, and these receptors pharmacologically most closely resemble the D2 family. Here we present a review of the current state of ...Continue Reading

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