Panagrellus redivivus

Panagrellus redivivus CNS, PNS and ENS Geary etal., unpublished observations... 

Atkinson, H.J., Isaac, R.E., Harris, P.D. and Sharpe, C.M. (1988) FMRFamide-immunoreactivity within the nervous system of the nematodes Panagrellus redivivus, Caenorhabditis elegans and Heterodera glycines. Journal of Zoology London 216, 663-671. 

Geary, T.G., Price, D.A., Bowman, J.W., Winterrowd, C.A., Mackenzie, C.D., Garrison, R.D., Williams, J.F. and Friedman, A.R. (1992) Two FMRFamide-like peptides from the free-living nematode Panagrellus redivivus. Peptides 13, 209-214. 

Maule, A.G., Shaw, C., Bowman, J.W., Halton, D.W., Thompson, D.P., Geary, T.G. and Thim, L. (1994a) KS A YMRF am ide a novel FMRFamide-related heptapeptide from the free-living nematode, Panagrellus redivivus, which is myoactive in the parasitic nematode, Ascaris suum. Biochemical and Biophysical Research Communications 200, 973-980. 

Depuration rates of diazinon differed significantly for two species of nematodes, Panagrellus redivivus and Bursaphelenchus xylophilus (Al-Attar and Knowles 1982). Both species showed maximum uptake of radiolabeled diazinon between 6 and 12 h, and both metabolized diazinon to diazoxon and pyrimidinol. By 96 h, 95% of the diazinon in P. redivivus had been metabolized, but only 26% was transformed in B. xylophilus, again demonstrating variability in diazinon metabolism between related species. 

Samoiloff, R. Schulz, S. Jordan, Y. Amott, E. A rapid simple long-term toxicity assay for aquatic contaminants using the nematode Panagrellus redivivus. Can. J. Fish. Aquat. Sci. 1980, 37, 1167-1174. 

Sjollema K, Dijksterhuis J, Veenhuis M, Harder W. An electron microscopical study of the infection of the nematode Panagrellus redivivus by the endoparasitic fungus Verticillium balanoides. Mycol Res 97 479-484, 1993. 

It is not yet known whether the latter can be metabolized to obtain energy. In the nematodes H. polygyrus and Panagrellus redivivus branched-chain amino acid metabolism follows the same pathways as in mammalian liver (22). 

Grantham, B. D. and Barrett J. (1986) Amino acid catabolism in the nematodes Helig-mosomoides polygyrus and Panagrellus redivivus. 2. Metabolism of the carbon skeleton. Parasitology 93 495-504. 

H. diminuta, Heligmosomoides polygyrus and in the free-living nematode Panagrellus redivivus (8). Ketone reductase activity, on the other hand, appears absent from these organisms. 

Two reports raise concern over the authenticity of the identification of 5-HT in some nematodes. Willett (163) summarized a series of experiments on Panagrellus redivivus, showing that 5-HT itself could not be detected in this nematode instead there is a compound resembling 5-HT, but heavier by 58 mass units. In A. galli, 5-HTP, 5-HIAA and 5-HT were identified chromatographically in extracts of whole worms, but attempts to produce 5-HT from radiolabeled tryptophan resulted in a compound clearly distinct from 5-HT (172). Complete chemical characterization will reveal whether these compounds are important signaling molecules or are intermediates of the degradative pathways. 

Davenport, T. R. B., Isaac, R. E. and Lee, D. L. (1991) The presence of peptides related to the adipokinetic hormone/red pigment concentrating hormone family in the nematode, Panagrellus redivivus. Gen. Comp. Endocrinol. 81 419-425. 

Smart, D., Preston, C. M. and Lloyd, D. (1990) The use of a novel motility assay for the isolation of bioactive peptides from the free-living nematode Panagrellus redivivus. Comp. Biochem. Physiol. 95B 335-339. 

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