What Do We (Need to) Know About the Melatonin in Crustaceans?

Sainath, S.B.; Swetha, Ch.; Reddy, P. Sreenivasula

doi:10.1002/jez.1800

Cited by 44 publications

(30 citation statements)

References 151 publications

(194 reference statements)

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“…In crustaceans, melatonin has been shown to have diverse physiological purposes (reviewed in [7]): Tilden et al 2003 [8] have demonstrated that melatonin modulates locomotory activity, glucose/lactate levels and neurotransmitter release in crayfish. Melatonin also has an influence on limb regeneration in the fiddler crab Uca pugilator [9] and influences the regulation of the molting of the edible crab Oziotelphusa senex senex [10].…”

Section: Introductionmentioning

confidence: 99%

Longevity of Daphnia and the attenuation of stress responses by melatonin

2014

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BackgroundThe widespread occurrence of melatonin in prokaryotes as well as eukaryotes indicates that this indoleamine is considerably old. This high evolutionary age has led to the development of diverse functions of melatonin in different organisms, such as the detoxification of reactive oxygen species and anti-stress effects. In insects, i.e. Drosophila, the addition of melatonin has also been shown to increase the life span of this arthropod, probably by reducing age-related increasing oxidative stress.Although the presence of melatonin was recently found to exist in the ecological and toxicological model organism Daphnia, its function in this cladoceran has thus far not been addressed. Therefore, we challenged Daphnia with three different stressors in order to investigate potential stress-response attenuating effects of melatonin. i) Female and male daphnids were exposed to melatonin in a longevity experiment, ii) Daphnia were confronted with stress signals from the invertebrate predator Chaoborus sp., and iii) Daphnia were grown in high densities, i.e. under crowding-stress conditions.ResultsIn our experiments we were able to show that longevity of daphnids was not affected by melatonin. Therefore, age-related increasing oxidative stress was probably not compensated by added melatonin. However, melatonin significantly attenuated Daphnia’s response to acute predator stress, i.e. the formation of neckteeth which decrease the ability of the gape-limited predator Chaoborus sp. to handle their prey. In addition, melatonin decreased the extent of crowding-related production of resting eggs of Daphnia.ConclusionsOur results confirm the effect of melatonin on inhibition of stress-signal responses of Daphnia. Until now, only a single study demonstrated melatonin effects on behavioral responses due to vertebrate kairomones, whereas we clearly show a more general effect of melatonin: i) on morphological predator defense induced by an invertebrate kairomone and ii) on life history characteristics transmitted by chemical cues from conspecifics. Therefore, we could generally confirm that melatonin plays a role in the attenuation of responses to different stressors in Daphnia.

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Section: Introductionmentioning

confidence: 99%

Longevity of Daphnia and the attenuation of stress responses by melatonin

2014

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“…This indoleamine is present in a variety of organisms, from unicellular algae to mammals, and its production follows a circadian rhythm [ 6 , 7 ]. Melatonin has also been identified in crustaceans, although its production and functions are not as well understood as they are in vertebrates [ 8 , 9 ]. Maciel and colleagues [ 10 ] reported that when the gills of the crab Neohelice granulata were incubated with melatonin (20 × 10 −9 M), oxygen consumption decreased.…”

Section: Introductionmentioning

confidence: 99%

Melatonin as a Signaling Molecule for Metabolism Regulation in Response to Hypoxia in the Crab Neohelice granulata

Maciel

Geihs

Cruz

et al. 2014

IJMS

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Melatonin has been identified in a variety of crustacean species, but its function is not as well understood as in vertebrates. The present study investigates whether melatonin has an effect on crustacean hyperglycemic hormone (CHH) gene expression, oxygen consumption (VO2) and circulating glucose and lactate levels, in response to different dissolved-oxygen concentrations, in the crab Neohelice granulata, as well as whether these possible effects are eyestalk- or receptor-dependent. Melatonin decreased CHH expression in crabs exposed for 45 min to 6 (2, 200 or 20,000 pmol·crab−1) or 2 mgO2·L−1 (200 pmol·crab−1). Since luzindole (200 nmol·crab−1) did not significantly (p > 0.05) alter the melatonin effect, its action does not seem to be mediated by vertebrate-typical MT1 and MT2 receptors. Melatonin (200 pmol·crab−1) increased the levels of glucose and lactate in crabs exposed to 6 mgO2·L−1, and luzindole (200 nmol·crab−1) decreased this effect, indicating that melatonin receptors are involved in hyperglycemia and lactemia. Melatonin showed no effect on VO2. Interestingly, in vitro incubation of eyestalk ganglia for 45 min at 0.7 mgO2·L−1 significantly (p < 0.05) increased melatonin production in this organ. In addition, injections of melatonin significantly increased the levels of circulating melatonin in crabs exposed for 45 min to 6 (200 or 20,000 pmol·crab−1), 2 (200 and 20,000 pmol·crab−1) and 0.7 (200 or 20,000 pmol·crab−1) mgO2·L−1. Therefore, melatonin seems to have an effect on the metabolism of N. granulata. This molecule inhibited the gene expression of CHH and caused an eyestalk- and receptor-dependent hyperglycemia, which suggests that melatonin may have a signaling role in metabolic regulation in this crab.

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“…Some researchers suppose that these processes could be responsible for the biological effects of geomagnetic activity [Close, 2012; Krylov, 2017; Vanderstraeten et al, 2015]. In addition, the synthesis of known mammalian circadian hormone melatonin in crustaceans also occurs in a diurnal manner and is involved in regulation of reproduction [Sainath et al, 2013]. Melatonin content in organisms directly depends on the light–dark cycle [Reiter, 1991].…”

Section: Discussionmentioning

confidence: 99%

The Influence of Changes in Magnetic Variations and Light–Dark Cycle on Life‐History Traits of Daphnia magna

Крылов

Papchenkova

Osipova

2020

Bioelectromagnetics

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Day–night cycle is the main zeitgeber (time giver) for biological circadian rhythms. Recently, it was suggested that natural diurnal geomagnetic variation may also be utilized by organisms for the synchronization of these rhythms. In this study, life‐history traits in Daphnia magna were evaluated after short‐term and multigenerational exposure to 16 h day/8 h night cycle, 32 h day/16 h night cycle, diurnal geomagnetic variation of 24 h, simulated magnetic variation of 48 h, and combinations of these conditions. With short‐term exposure, the lighting mode substantially influenced the brood to brood period and the lifespan in daphnids. The brood to brood period, brood size, and body length of crustaceans similarly depended on the lighting mode during the multigenerational exposure. At the same time, an interaction of lighting mode and magnetic variations affected to a lesser extent brood to brood period, brood size, and newborn's body length. The influence of simulated diurnal variation on life‐history traits in daphnids appeared distinctly as effects of synchronization between periods of lighting mode and magnetic variations during the multigenerational exposure. Newborn's body length significantly depended on the lighting regime when the periods of both studied zeitgebers were unsynchronized, or on the interaction of light regime with magnetic variations when the periods were synchronized. These results confirm the hypothesis that diurnal geomagnetic variation is an additional zeitgeber for biological circadian rhythms. Possible mechanisms for these observed effects are discussed. Bioelectromagnetics. © 2020 Bioelectromagnetics Society

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What Do We (Need to) Know About the Melatonin in Crustaceans?

Cited by 44 publications

References 151 publications

Longevity of Daphnia and the attenuation of stress responses by melatonin

Longevity of Daphnia and the attenuation of stress responses by melatonin

Melatonin as a Signaling Molecule for Metabolism Regulation in Response to Hypoxia in the Crab Neohelice granulata

The Influence of Changes in Magnetic Variations and Light–Dark Cycle on Life‐History Traits of Daphnia magna

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