Reprogramming chemotaxis responses: sensory neurons define olfactory preferences in C. elegans

Article Abstract:

A small number of olfactory neurons expresses several different odorant receptors in the nematode C. elegans. Distinct behaviors such as avoidance, attraction, mating or feeding are caused by odorants which are specified by the olfactory neuron or the olfactory receptor. Results indicate that the receptor protein ODR-10 detects the attractive odorant diacetyl while the AWB olfactory neurons detect the repulsive odorant 2-nonanone. Findings suggest that an odor preference is determined by the sensory neurons that express a given odorant receptor molecule.

Chemotaxis, Chemoreceptors, Nematoda, Nematodes

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The conserved immunoglobulin superfamily member SAX-3/robo directs multiple aspects of axon guidance in C. elegans

Article Abstract:

Research was conducted to examine the effects of the Caenorhabditis elegans sax-3 gene in the ventral nerve cord. Multiple lines of transgenic strains were determined for rescue of the nerve ring phenotype while sax-3 cDNA were isolated by screening plagues of a mixed stage C. elegans cDNA library. Results showed that the sax-3 mutants were defective in the axon guidance of neurons in the C. elegans nervous system. The expression of sax-3::GFP in developing neurons indicated that SAX-3 acted as a receptor.

Nervous system, Immunoglobulins, Axons

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Natural variation in a neuropeptide Y receptor homolog modifies social behavior and food response in C. elegans

Article Abstract:

A study was conducted on the Caenorhabditis elegans to investigate the effects genetic variability in its social feeding behavior. Different wild strains of C. elegans that exhibit either solitary or social feeding behavior were used in the study. Results showed that variation in the feeding behavior in C. elegans is due to the natural variation in the npr-1 gene, a predicted G protein-coupled receptor that is like the neuropeptide Y receptors.

Social behavior in animals, Animal social behavior, Neuropeptide Y

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