title: Application of D-Crustacean Hyperglycemic Hormone Induces Peptidases Transcription and Suppresses Glycolysis-Related Transcripts in the Hepatopancreas of the Crayfish Pontastacus leptodactylus - Results of a Transcriptomic Study.
abstract: The crustacean Hyperglycemic Hormone (cHH) is a neuropeptide present in many decapods. Two different chiral isomers are simultaneously present in Astacid crayfish and their specific biological functions are still poorly understood. The present study is aimed at better understanding the potentially different effect of each of the isomers on the hepatopancreatic gene expression profile in the crayfish Pontastacus leptodactylus, in the context of short term hyperglycemia. Hence, two different chemically synthesized cHH enantiomers, containing either L- or D-Phe(3), were injected to the circulation of intermolt females following removal of their X organ-Sinus gland complex. The effects triggered by the injection of the two alternate isomers were detected after one hour through measurement of circulating glucose levels. Triggered changes of the transcriptome expression profile in the hepatopancreas were analyzed by RNA-seq. A whole transcriptome shotgun sequence assembly provided the assumedly complete transcriptome of P. leptodactylus hepatopancreas, followed by RNA-seq analysis of changes in the expression level of many genes caused by the application of each of the hormone isomers. Circulating glucose levels were much higher in response to the D-isoform than to the L-isoform injection, one hour from injection. Similarly, the RNA-seq analysis confirmed a stronger effect on gene expression following the administration of D-cHH, while just limited alterations were caused by the L-isomer. These findings demonstrated a more prominent short term effect of the D-cHH on the transcription profile and shed light on the effect of the D-isomer on specific functional gene groups. Another contribution of the study is the construction of a de novo assembly of the hepatopancreas transcriptome, consisting of 39,935 contigs, that dramatically increases the molecular information available for this species and for crustaceans in general, providing an efficient tool for studying gene expression patterns in this organ.
authors.affiliation: Dipartimento di Scienze della Vita, Università di Trieste, Trieste, Italy.
authors.forename: Chiara
authors.initials: C
authors.lastname: Manfrin
authors.forename: Moshe
authors.initials: M
authors.lastname: Tom
authors.forename: Gianluca
authors.initials: G
authors.lastname: De Moro
authors.forename: Marco
authors.initials: M
authors.lastname: Gerdol
authors.forename: Corrado
authors.initials: C
authors.lastname: Guarnaccia
authors.forename: Alessandro
authors.initials: A
authors.lastname: Mosco
authors.forename: Alberto
authors.initials: A
authors.lastname: Pallavicini
authors.forename: Piero Giulio
authors.initials: PG
authors.lastname: Giulianini
mesh_terms: D000818:Animals; D060829:Arthropod Proteins / Q000494:pharmacology*; D003400:Astacoidea / Q000235:genetics*; D005260:Female; D020869:Gene Expression Profiling; D015971:Gene Expression Regulation, Enzymologic / Q000187:drug effects; D006019:Glycolysis / Q000187:drug effects* / Q000235:genetics*; D043143:Hepatopancreas / Q000187:drug effects* / Q000201:enzymology / Q000378:metabolism; D007447:Invertebrate Hormones / Q000494:pharmacology*; D053858:Metabolic Networks and Pathways / Q000187:drug effects / Q000235:genetics; D009419:Nerve Tissue Proteins / Q000494:pharmacology*; D010447:Peptide Hydrolases / Q000235:genetics*; D014158:Transcription, Genetic / Q000187:drug effects; D059467:Transcriptome / Q000187:drug effects
chemical_list: D060829:Arthropod Proteins; D007447:Invertebrate Hormones; D009419:Nerve Tissue Proteins; C015947:hyperglycemic hormone, crustacean; D010447:Peptide Hydrolases