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Insight into the Molecular and Functional Diversity of Cnidarian Neuropeptides

Suntory Foundation for Life Sciences, Bioorganic Research Institute, Osaka 618-8503, Japan
Research Center for Marine Biology, Asamushi, Graduate School of Life Sciences, Tohoku University, Aomori 039-3501, Japan
Author to whom correspondence should be addressed.
Academic Editor: Brijesh Tiwari
Int. J. Mol. Sci. 2015, 16(2), 2610-2625;
Received: 22 December 2014 / Revised: 6 January 2015 / Accepted: 15 January 2015 / Published: 23 January 2015
(This article belongs to the Special Issue Bioactive Carbohydrates and Peptides)
Cnidarians are the most primitive animals to possess a nervous system. This phylum is composed of the classes Scyphozoa (jellyfish), Cubozoa (box jellyfish), and Hydrozoa (e.g., Hydra, Hydractinia), which make up the subphylum Medusozoa, as well as the class Anthozoa (sea anemones and corals). Neuropeptides have an early evolutionary origin and are already abundant in cnidarians. For example, from the cnidarian Hydra, a key model system for studying the peptides involved in developmental and physiological processes, we identified a wide variety of novel neuropeptides from Hydra magnipapillata (the Hydra Peptide Project). Most of these peptides act directly on muscle cells and induce contraction and relaxation. Some peptides are involved in cell differentiation and morphogenesis. In this review, we describe FMRFamide-like peptides (FLPs), GLWamide-family peptides, and the neuropeptide Hym-355; FPQSFLPRGamide. Several hundred FLPs have been isolated from invertebrate animals such as cnidarians. GLWamide-family peptides function as signaling molecules in muscle contraction, metamorphosis, and settlement in cnidarians. Hym-355; FPQSFLPRGamide enhances neuronal differentiation in Hydra. Recently, GLWamide-family peptides and Hym-355; FPQSFLPRGamide were shown to trigger oocyte maturation and subsequent spawning in the hydrozoan jellyfish Cytaeis uchidae. These findings suggest the importance of these neuropeptides in both developmental and physiological processes. View Full-Text
Keywords: cnidaria; hydra; jellyfish; coral; neuropeptide cnidaria; hydra; jellyfish; coral; neuropeptide
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MDPI and ACS Style

Takahashi, T.; Takeda, N. Insight into the Molecular and Functional Diversity of Cnidarian Neuropeptides. Int. J. Mol. Sci. 2015, 16, 2610-2625.

AMA Style

Takahashi T, Takeda N. Insight into the Molecular and Functional Diversity of Cnidarian Neuropeptides. International Journal of Molecular Sciences. 2015; 16(2):2610-2625.

Chicago/Turabian Style

Takahashi, Toshio; Takeda, Noriyo. 2015. "Insight into the Molecular and Functional Diversity of Cnidarian Neuropeptides" Int. J. Mol. Sci. 16, no. 2: 2610-2625.

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