Chapter 7 Gametogenesis, Spawning, and Fertilization in Bivalves and Other Protostomes

Deguchi, Ryusaku; Osada, Makoto

doi:10.1007/978-981-15-2290-1_8

Cited by 3 publications

(7 citation statements)

References 295 publications

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“…Thus, for instance, the sensitivity of oocytes to MIHs can be affected by other hormones produced by different tissues. This is the case in scallops, where the expression of the serotonin receptor in the gonad is upregulated upon maturity by estradiol produced in ovaries [1,115]. In vertebrates, estradiol produced by ovarian follicle cells controls the production of vitellogenin for the oocyte by the liver.…”

Section: Discussionmentioning

confidence: 99%

“…MIH-related peptides and cAMP analogues can trigger oocyte maturation across a range of hydrozoan species [37,181], so this mechanism is likely shared at least in a large group of cnidarian species. GPCRs have also been implicated in triggering the maturation of mollusc and annelid in response to serotonin (5-HT) [1,32]. A diversity of serotonin receptors and downstream pathways appears to be deployed across species [1,217].…”

Section: Discussionmentioning

confidence: 99%

“…Subsequent studies have led to a good understanding of the biochemical regulation of maturation in several fish species [29] and in mammals, especially mouse [5]. Additional knowledge has come from other diverse species, including Caenorhabditis elegans [30], Drosophila [31], Cerebratulus [32], molluscs and annelids [1]. From these, we can present a global scheme in which signalling pathways initiated by MIH lead to the activation of the MPF.…”

Section: From Mih Stimulation To Mpf Activationmentioning

confidence: 99%

“…MIH is released from somatic cells near the oocyte in response to hormonal and environmental inputs. Examples of molecules that can act as MIHs include steroids in amphibian and fish [29,33], 1-methyl-adenine in starfish [34], serotonin in bivalve molluscs and nemertean worms [1,32,35,36], and short amidated peptides in hydrozoans [37]. Reflecting this molecular diversity of MIHs, their receptors on the oocyte surface appear to be of several distinct types, and to act via different second messenger systems.…”

Section: From Mih Stimulation To Mpf Activationmentioning

confidence: 99%

“…Regulation of the timing of translation of these mRNAs and/or of insertion of the protein into the plasma membrane could potentially be important safeguards of the prophase block during oocyte growth. In the scallop gonad, increasing expression of serotonin receptors on the oocyte membrane during oocyte growth is under the control of estradiol [1,115].…”

Section: (I) Mih Delivery and Receptor Bindingmentioning

confidence: 99%

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Managing the Oocyte Meiotic Arrest—Lessons from Frogs and Jellyfish

Jessus

Munro

Houliston

2020

Cells

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During oocyte development, meiosis arrests in prophase of the first division for a remarkably prolonged period firstly during oocyte growth, and then when awaiting the appropriate hormonal signals for egg release. This prophase arrest is finally unlocked when locally produced maturation initiation hormones (MIHs) trigger entry into M-phase. Here, we assess the current knowledge of the successive cellular and molecular mechanisms responsible for keeping meiotic progression on hold. We focus on two model organisms, the amphibian Xenopus laevis, and the hydrozoan jellyfish Clytia hemisphaerica. Conserved mechanisms govern the initial meiotic programme of the oocyte prior to oocyte growth and also, much later, the onset of mitotic divisions, via activation of two key kinase systems: Cdk1-Cyclin B/Gwl (MPF) for M-phase activation and Mos-MAPkinase to orchestrate polar body formation and cytostatic (CSF) arrest. In contrast, maintenance of the prophase state of the fully-grown oocyte is assured by highly specific mechanisms, reflecting enormous variation between species in MIHs, MIH receptors and their immediate downstream signalling response. Convergence of multiple signalling pathway components to promote MPF activation in some oocytes, including Xenopus, is likely a heritage of the complex evolutionary history of spawning regulation, but also helps ensure a robust and reliable mechanism for gamete production.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: From Mih Stimulation To Mpf Activationmentioning

confidence: 99%

Section: From Mih Stimulation To Mpf Activationmentioning

confidence: 99%

Section: (I) Mih Delivery and Receptor Bindingmentioning

confidence: 99%

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Managing the Oocyte Meiotic Arrest—Lessons from Frogs and Jellyfish

Jessus

Munro

Houliston

2020

Cells

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Coculture with Eastern oysters is unlikely to reduce OsHV-1 impacts to farmed Pacific oysters: A modelling approach

Adekunle,

Bidegain,

Ben-Horin

2025

Aquaculture Reports

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Oviducal gland transcriptomics of Octopus maya through physiological stages and the negative effects of temperature on fertilization

Juárez¹,

Arreola-Meraz²,

Sánchez‐Castrejón³

et al. 2022

PeerJ

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Background Elevated temperatures reduce fertilization and egg-laying rates in the octopus species. However, the molecular mechanisms that control the onset of fertilization and egg-laying in the octopus’ oviducal gland are still unclear; and the effect of temperature on the expression of key reproductive genes is unknown. This study aims to better understand the molecular bases of octopus fertilization and egg-laying, and how they are affected by elevated temperatures. Method RNA-seq of oviducal glands was performed for samples before, during, and after fertilization and their transcriptomic profiles were compared. Also, at the fertilization stage, the optimal and thermal-stress conditions were contrasted. Expression levels of key reproductive genes were validated via RT-qPCR. Results In mated females before egg-laying, genes required for the synthesis of spermine, spermidine, which may prevent premature fertilization, and the myomodulin neuropeptide were upregulated. Among the genes with higher expression at the fertilization stage, we found those encoding the receptors of serotonin, dopamine, and progesterone; genes involved in the assembly and motility of the sperm flagellum; genes that participate in the interaction between male and female gametes; and genes associated with the synthesis of eggshell mucoproteins. At temperatures above the optimal range for reproduction, mated females reduced the fertilization rate. This response coincided with the upregulation of myomodulin and APGW-amide neuropeptides. Also, genes associated with fertilization like LGALS3, VWC2, and Pcsk1 were downregulated at elevated temperatures. Similarly, in senescent females, genes involved in fertilization were downregulated but those involved in the metabolism of steroid hormones like SRD5A1 were highly expressed.

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Chapter 7 Gametogenesis, Spawning, and Fertilization in Bivalves and Other Protostomes

Cited by 3 publications

References 295 publications

Managing the Oocyte Meiotic Arrest—Lessons from Frogs and Jellyfish

Managing the Oocyte Meiotic Arrest—Lessons from Frogs and Jellyfish

Coculture with Eastern oysters is unlikely to reduce OsHV-1 impacts to farmed Pacific oysters: A modelling approach

Oviducal gland transcriptomics of Octopus maya through physiological stages and the negative effects of temperature on fertilization

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