Molecular biology of neurohormone precursors in the eyestalk of Crustacea

Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology
D P de Kleijn, F van Herp

Abstract

Our knowledge concerning the primary structures of crustacean neuropeptides has been broadened considerably during the last few years and has greatly contributed to the successful application of molecular biological techniques to crustacean neuroendocrine research. In this review, we compare and discuss the preprohormones of the Red Pigment Concentrating Hormone (RPCH), the Pigment-Dispersing Hormone (PDH) and the different members of the Crustacean Hyperglycemic Hormone, Molt-Inhibiting and Gonad-Inhibiting Hormone family (CHH/MIH/GIH peptide family), recently elucidated by cloning and sequencing of the respective cDNAs. Expression studies, using in situ hybridization, Northern blots and RNase protection assays, have demonstrated that the mRNAs encoding some of the aforementioned preprohormones (for example, preproPDH and preproCHH) are not only expressed in the eyestalk but also in other parts of the central nervous system. The combination of molecular biological techniques with (bio)chemical and immunochemical methods provides elegant tools to study neuropeptides at the level of mRNA and peptide in individual animals during different physiological conditions. The fundamental knowledge obtained by such a combined approach wil...Continue Reading

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Citations

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