CDK1/cyclin B regulation during oocyte maturation in two closely related lugworm species, <i>Arenicola marina</i> and <i>Arenicola defodiens</i>

Chausson, Fabienne; Paterson, Lesley; Betteley, Katherine; Hannah, Lucie; Meijer, Laurent; Bentley, M. G.

doi:10.1111/j.1440-169x.2004.00723.x

Cited by 10 publications

(3 citation statements)

References 44 publications

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“…MPF is a complex of two proteins, a regulatory component called cyclin B and the catalytic component protein kinase known as cyclin dependent kinase, Cdk1 (Yamashita et al 1992;Chausson et al 2004). Using mouse anti-cyclin monoclonal and anti-PSTAIRE antibodies we initially confirmed the presence of a 50 kDa cyclin B and a conserved p34Cdk1 protein in the oocyte extract of Catla catla as in our previously studied carps.…”

Section: Discussionmentioning

confidence: 99%

Implication of melatonin in oocyte maturation in Indian major carp Catla catla

Maitra

Chattoraj

Bhattacharyya

2005

Fish Physiol Biochem

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Importance of melatonin (N-acetyl-5-methoxytryptamine) in the regulation of oocyte maturation has been studied in a carp Catla catla. Melatonin secretory cells were immunocytochemically localized only in the end vesicle. Diurnal and seasonal studies indicated that the serum levels of melatonin exhibit a minimum diurnal value in the mid-day of all seasons, but the peak value is attained either at mid-night or just before the onset of light. Moreover, highest seasonal value of melatonin was noted in the post-spawning phase. Administration of melatonin at different doses (25, 50, or 100 mug/100 g body weight) for 1, 15, or 30 days resulted in either pro- or anti-gonadal effects depending on the reproductive seasons. In vitro study revealed that incubation of oocytes with melatonin 4h prior to addition of MIH in the medium led to an accelerated rate of oocyte maturation through the formation of a complex of two proteins (MPF), cyclin B and cyclin dependant kinase, Cdc2. Moreover, melatonin pre-incubation considerably increased MIH stimulation of histone H1 phosphorylation as compared to MIH alone. Taken together, gathered information promotes the idea of a physiological role of melatonin in the maturation of oocytes in Catla catla.

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Section: Discussionmentioning

confidence: 99%

Implication of melatonin in oocyte maturation in Indian major carp Catla catla

Maitra

Chattoraj

Bhattacharyya

2005

Fish Physiol Biochem

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“…It has now been demonstrated that sea urchin embryos exposed to decadienal during early ontogeny are unable to activate the G 2 -M phase promoting-complex cyclin B-Cdk1 despite an accumulation of cyclin B [ 107 ]. The G 2 -M phase promoting-complex is also essential for oocyte maturation in several marine invertebrates [ 108 ]. It is therefore likely that decadienal is acting against the maturation-promoting-complex in oocytes of A. rubens and probably copepods, thereby initiating a terminal cellular response.…”

Section: Gametogenic Effectsmentioning

confidence: 99%

The Influence of Bioactive Oxylipins from Marine Diatoms on Invertebrate Reproduction and Development

Caldwell

2009

Marine Drugs

104

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Diatoms are one of the main primary producers in aquatic ecosystems and occupy a vital link in the transfer of photosynthetically-fixed carbon through aquatic food webs. Diatoms produce an array of biologically-active metabolites, many of which have been attributed as a form of chemical defence and may offer potential as candidate marine drugs. Of considerable interest are molecules belonging to the oxylipin family which are broadly disruptive to reproductive and developmental processes. The range of reproductive impacts includes; oocyte maturation; sperm motility; fertilization; embryogenesis and larval competence. Much of the observed bioactivity may be ascribed to disruption of intracellular calcium signalling, induction of cytoskeletal instability and promotion of apoptotic pathways. From an ecological perspective, the primary interest in diatom-oxylipins is in relation to the potential impact on energy flow in planktonic systems whereby the reproductive success of copepods (the main grazers of diatoms) is compromised. Much data exists providing evidence for and against diatom reproductive effects; however detailed knowledge of the physiological and molecular processes involved remains poor. This paper provides a review of the current state of knowledge of the mechanistic impacts of diatom-oxylipins on marine invertebrate reproduction and development.

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“…MPF is responsible for controlling meiotic reinitiation, and in healthy oocytes, is present in a pre-MPF form awaiting activation through phosphorylation (Paterson et al, 1999;Chausson, et al, 2004). The observations suggest that eventually the checkpoint at the start of meiosis may be "overrun", and despite the absence of the correct cue for development, namely fertilisation, re-initiation of meiosis can still occur.…”

Section: Discussionmentioning

confidence: 87%

Impact of pH on oocyte fertilisation and the overrun of meiotic checkpoints leading to parthenogenetic development inNereis virens

Bouch¹,

Olive²

2005

Invertebrate Reproduction & Development

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Whilst developing a fertilisation assay to quantify the onset of fertilisability in oocytes from cultured Nereis virens, development through to the blastula stage was observed within the negative control. In the absence of sperm, some oocytes re-initiated the cell cycle without fertilisation which is the usual cue in this species. Investigations showed that a lower pH of 6.6 significantly increased the incidence of this parthenogenetic development which was also observed to be more rapid than was observed in normal sperm fertilised development. Cleavage was reached within 3 h if no sperm were present, but took longer when the oocytes were fertilised with sperm. The parthenogenetic development is symptomatic of a breakdown between the environmental cues that would cause final maturation and spawning in wild animals and the re-initiation of meiosis. In culture systems, where sufficient environmental cues may be lacking, oocytes can attain an overripe "trigger happy" state where minor shocks can initiate development in the absence of sperm. The avoidance of this state in cultured animals is therefore an important management objective.

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CDK1/cyclin B regulation during oocyte maturation in two closely related lugworm species, Arenicola marina and Arenicola defodiens

Cited by 10 publications

References 44 publications

Implication of melatonin in oocyte maturation in Indian major carp Catla catla

Implication of melatonin in oocyte maturation in Indian major carp Catla catla

The Influence of Bioactive Oxylipins from Marine Diatoms on Invertebrate Reproduction and Development

Impact of pH on oocyte fertilisation and the overrun of meiotic checkpoints leading to parthenogenetic development inNereis virens

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