Crustacean hyperglycemic hormone is synthesized in the eyestalk and brain of the crayfish Procambarus clarkii

Loredo-Ranjel, Rosaura; Fanjul‐Moles, María Luisa; Escamilla‐Chimal, Elsa G.

doi:10.1371/journal.pone.0175046

Cited by 21 publications

(11 citation statements)

References 35 publications

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“…In Crustacea , CHH is responsible for an increase in glucose levels in the haemolymph during phases of high locomotor activity, in particular during the upward and downward vertical migrations 52 . Circadian oscillations in CHH expression and release have been observed in Procambarus clarkii 55 . In krill, CHH showed an oscillatory expression profile in both LD and DD, with a periodicity of 24 hours.…”

Section: Resultsmentioning

confidence: 99%

Analysis of the circadian transcriptome of the Antarctic krill Euphausia superba

Biscontin

Martini

Costa

et al. 2019

Sci Rep

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Antarctic krill (Euphausia superba) is a high latitude pelagic organism which plays a central role in the Southern Ocean ecosystem. E. superba shows daily and seasonal rhythms in physiology and behaviour, which are synchronized with the environmental cycles of its habitat. Recently, the main components of the krill circadian machinery have been identified and characterized. However, the exact mechanisms through which the endogenous timing system operates the control and regulation of the overt rhythms remains only partially understood. Here we investigate the involvement of the circadian clock in the temporal orchestration of gene expression by using a newly developed version of a krill microarray platform. The analysis of transcriptome data from krill exposed to both light-dark cycles (LD 18:6) and constant darkness (DD), has led to the identification of 1,564 putative clock-controlled genes. A remarkably large proportion of such genes, including several clock components (clock, period, cry2, vrille, and slimb), show oscillatory expression patterns in DD, with a periodicity shorter than 24 hours. Energy-storage pathways appear to be regulated by the endogenous clock in accordance with their ecological relevance in daily energy managing and overwintering. Our results provide the first representation of the krill circadian transcriptome under laboratory, free-running conditions.

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Section: Resultsmentioning

confidence: 99%

Analysis of the circadian transcriptome of the Antarctic krill Euphausia superba

Biscontin

Martini

Costa

et al. 2019

Sci Rep

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“…This was influenced by the major genes HK and PK. Thus, the whole process elevates HK, PK and CHH for carbohydrate intake (Loredo‐Ranjel et al, 2017; Panigrahi, Esakkiraj, et al., 2019; Panigrahi, Sundaram, Saranya, Swain, et al., 2019) and also increases amylase and protease activity in shrimps. This proves the synchronization of amylase and HK.…”

Section: Discussionmentioning

confidence: 99%

Three different C: N ratios for Pacific white shrimp, Penaeus vannamei under practical conditions: Evaluation of growth performance, immune and metabolic pathways

et al. 2020

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A 28‐day experiment was carried out to evaluate different C/N ratios (10:1, 15:1 and 20:1) on growth performance, water quality, survival rate and gene expression related to metabolic pathways of Penaeus vannamei in a biofloc system. To maintain the C/N ratio of the feed input, different carbon sources (molasses, rice bran and wheat flour) in combination were applied after fermentation for a day with biofloc consortium. Results showed that shrimps reared in C/N 10 (630 mg) and C/N 15 (646 mg) biofloc systems showed significantly (p = .0229 and .0263) higher growth when compared to C/N 20 (528 mg) and control (374 mg). With regard to the production of extracellular enzymes, protease, lipase and xylanase were found predominantly in colonized bacteria isolated from biofloc treatments, whereas amylase was commonly found in all the treatments. The proPO activity was considerably increased in C/N 10 and 15 treatments than C/N 20 and control. The ranges of relative expression levels of potential genes entailed in metabolite pathway like hexokinase (HK‐ 6.57–8.17), pyruvate kinase (PK‐5.79–7.96), crustacean hyperglycaemic hormone (CHH‐ 6.99–7.66) and fatty acid synthase (FAS‐ 6.57–8.86), triacylglycerol lipase (TGL‐6.99–8.66) and immune gene (Toll receptor‐ 4.57–4.86) fold up‐regulated expression were observed in the biofloc treatments than that of the control. The overall findings indicate that the rearing of P. vannamei shrimp in C/N 10 and 15 biofloc systems could improve the growth performance, water quality and development of immune and metabolic responses.

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“…It is assumed that, during the molting cycle of crustacean, MIH secreted from the X-organ/sinus gland complex inhibits the ecdysteroid synthesis in Y-organs and suppresses molting [ 4 – 7 ]. In crustaceans, MIH and members of the family of crustacean hyperglycemic hormone (CHH) neuropeptide, including crustacean hyperglycemic hormone (CHH) and gonad inhibiting hormone (GIH), have been widely investigated [ 8 – 9 ]. These hormones are involved in many biological processes, such as molting, reproduction, glucose metabolism, morphogenesis and osmoregulation [ 10 – 13 ].…”

Section: Introductionmentioning

confidence: 99%

Characterization, expression patterns of molt-inhibiting hormone gene of Macrobrachium nipponense and its roles in molting and growth

et al. 2018

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The oriental river prawn, Macrobrachium nipponense, is an important commercial aquaculture resource in China. In order to overwinter, M. nipponense displays decreased physiological activity and less consumption of energy. Sudden warming would trigger molting and cause an extensive death, resulting in huge economic losses. Therefore, it is of great practical significance to study the molting mechanism of oriental river prawns. Molt-inhibiting hormone gene (MIH) plays a major role in regulating molting in crustaceans. In this study, a full length MIH cDNA of M. nipponense (Mn-MIH) was cloned from the eyestalk. The total length of the Mn-MIH was 925 bp, encoding a protein of 119 amino acids. Tissue distribution analysis showed that Mn-MIH was highly expressed in the eyestalk, and that it had relatively low expression in gill, ovary, and abdominal ganglion. Mn-MIH was detected in all developmental stages, and changed regularly in line with the molting cycle of the embryo and larva. Mn-MIH varied in response to the molting cycle, suggesting that Mn-MIH negatively regulates ecdysteroidogenesis. Mn-MIH inhibition by RNAi resulted in a significant acceleration of molting cycles in both males and females, confirming the inhibitory role of MIH in molting. After long-term RNAi males, but not females had significant weight gain, confirming that Mn-MIH plays an important role in growth of M. nipponense. Our work contributes to a better understanding of the role of Mn-MIH in crustacean molting and growth.

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Crustacean hyperglycemic hormone is synthesized in the eyestalk and brain of the crayfish Procambarus clarkii

Cited by 21 publications

References 35 publications

Analysis of the circadian transcriptome of the Antarctic krill Euphausia superba

Analysis of the circadian transcriptome of the Antarctic krill Euphausia superba

Three different C: N ratios for Pacific white shrimp, Penaeus vannamei under practical conditions: Evaluation of growth performance, immune and metabolic pathways

Characterization, expression patterns of molt-inhibiting hormone gene of Macrobrachium nipponense and its roles in molting and growth

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