Voltage-dependent calcium channels in the corpora allata of the adult male loreyi leafworm, Mythimna loreyi

Hsieh, Yi‐Chun; Yang, En‐Cheng; Hsu, Err-Lieh; Chow, Yien Shing; Kou, Rong

doi:10.1016/s0965-1748(01)00133-3

Cited by 6 publications

(4 citation statements)

References 38 publications

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“…The L-DIL used in this study is 98% in purity and contains a very small amount of D-DIL, which is an isomer of L-DIL and is known to inhibit L-type voltage-sensitive calcium channel in insects (Hsieh et al 2002). Therefore, we tested the effects of verapamil (Hsieh et al 2002), an inhibitor of L-type calcium channel.…”

Section: Cyclic Nucleotide-gated Anion Channel and Calmodulin Intervementioning

confidence: 99%

“…Therefore, we tested the effects of verapamil (Hsieh et al 2002), an inhibitor of L-type calcium channel. Injection of verapamil (1 mM) before multiple-trial conditioning had no effects on 24-h retention (data not shown), thereby suggesting that the observed impairment of LTM by L-DIL is not due to inhibition of L-type calcium channels.…”

Section: Cyclic Nucleotide-gated Anion Channel and Calmodulin Intervementioning

confidence: 99%

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Critical role of nitric oxide-cGMP cascade in the formation of cAMP-dependent long-term memory

Matsumoto

Unoki²,

Aonuma³

et al. 2006

Learn. Mem.

105

140

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Cyclic AMP pathway plays an essential role in formation of long-term memory (LTM). In some species, the nitric oxide (NO)-cyclic GMP pathway has been found to act in parallel and complementary to the cAMP pathway for LTM formation. Here we describe a new role of the NO-cGMP pathway, namely, stimulation of the cAMP pathway to induce LTM. We have studied the signaling cascade underlying LTM formation by systematically coinjecting various "LTM-inducing" and "LTM-blocking" drugs in crickets. Multiple-trial olfactory conditioning led to LTM that lasted for several days, while memory induced by single-trial conditioning decayed away within several hours. Injection of inhibitors of the enzyme forming NO, cGMP, or cAMP into the hemolymph prior to multiple-trial conditioning blocked LTM, whereas injection of an NO donor, cGMP analog, or cAMP analog prior to single-trial conditioning induced LTM. Induction of LTM by injection of an NO donor or cGMP analog paired with single-trial conditioning was blocked by inhibitors of the cAMP pathway, but induction of LTM by a cAMP analog was unaffected by inhibitors of the NO-cGMP pathway. Inhibitors of cyclic nucleotide-gated channel (CNG channel) or calmodulin-blocked induction of LTM by cGMP analog paired with single-trial conditioning, but they did not affect induction of LTM by cAMP analog. Our findings suggest that the cAMP pathway is a downstream target of the NO-cGMP pathway for the formation of LTM, and that the CNG channel and calcium-calmodulin intervene between the NO-cGMP pathway and the cAMP pathway.In both vertebrates and invertebrates, nervous systems store information for short-term memory (STM) and long-term memory (LTM) by changing the strength of their synaptic connections (Kandel 2001). Studies in many species, including mollusca Aplysia, fruitflies Drosophila, and mice, suggest that STM storage is accompanied by transient changes in the strength of synaptic connections by covalent modifications of pre-existing proteins and that LTM storage, in contrast, is accompanied by enduring changes in synaptic strength that require transcription and translation of genes (Montarolo et al. 1986;DeZazzo and Tully 1995). In all of these species, formation of LTM requires an increase in intracellular cAMP and recruitment of the cAMP-dependent protein kinase (PKA) that phosphorylates the transcription factor, cAMP-responsive element-binding protein (CREB) (Bartsch et al. 1995;Yin et al. 1995;Abel et al. 1997).The roles of the cAMP pathway in the formation of LTM are often supplemented by other signaling pathways, most notably by the nitric oxide (NO)-cGMP signaling pathway (Lewin and Walters 1999;Lu et al. 1999). NO is a membrane-permeable molecule that functions in intercellular signaling in the brain (Garthwaite et al. 1988). In mice, NO contributes to late-phase longterm potentiation of synaptic transmission by stimulating soluble guanylate cyclase in target cells, and the resulting increase in cGMP concentration stimulates cGMP-dependent protein kinase (PKG), which acts in p...

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Section: Cyclic Nucleotide-gated Anion Channel and Calmodulin Intervementioning

confidence: 99%

Section: Cyclic Nucleotide-gated Anion Channel and Calmodulin Intervementioning

confidence: 99%

Critical role of nitric oxide-cGMP cascade in the formation of cAMP-dependent long-term memory

Matsumoto

Unoki²,

Aonuma³

et al. 2006

Learn. Mem.

105

140

View full text Add to dashboard Cite

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“…the corpora allata of Mythimna loreyi (Hsieh et al, 2002), and the Malphigian tubules and neurons of Drosophila melanogaster (Schmidt et al, 2000;MacPherson et al, 2001). The VCEC inhibitors, originally developed in vertebrate species, appear to act in insects in the same way for L, N and T-type channels (Hsieh et al, 2002). In Drosophila, nifedipine, a dihydropyridine antagonist of VCEC L-type channels, provided maximum inhibition of L-channel activity at concentrations of 10 À10 -10 À7 mol/L, whereas verapamil was effective at concentrations of 10 À5 -10 À3 mol/L.…”

Section: Voltage-gated Ca 2+ Entry Channelsmentioning

confidence: 99%

Ca2+ signaling in prothoracicotropic hormone-stimulated prothoracic gland cells of Manduca sexta: Evidence for mobilization and entry mechanisms

Fellner

Rybczynski

Gilbert

2005

Insect Biochemistry and Molecular Biology

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“…Since M. loreyi is facilitated to breed, some researchers focus on the identification of products secreted by the adult corpora allata (Ho et al 1995). Not only physiological understanding of this species (Hsieh et al, 2001;Hsieh et al, 2002;Kou, 2002;Kou and Chen, 2000) but also ecology-based developmental characteristic (Qin et al, 2017) and flight performance (Qin et al, 2018) was also studied. For the biological control, M. loreyi densovirus (MIDNVs) isolated in Egypt and characterized (El-Far et al, 2004;Fediere et al, 2004).…”

Section: Intoductionmentioning

confidence: 99%

Development of a species diagnostic molecular tool for an invasive pest,Mythimna loreyiusing LAMP

Nam

Kwon

Kim

et al. 2020

Preprint

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The Mythimna loreyi (Duponchel) is one of the well-known a noctuid pest in Africa, Australia, and many Asian countries. This species has recently emerged as an invasive pest of some cereal crops in Korea. However, it is extremely difficult to identify the morphologically similar species, Mythimna separate, which occur at the cornfield in the larvae stage. Therefore, it is hard to accurately investigate invasive pests. In this study, the LAMP assay was developed for rapid, simple, effective species identification. By analyzing the mt genome, the species-specific sequence was found at the coding region of the NADH dehydrogenase subunit 5 gene. Based on this unique sequence, four LAMP primers and two loop primers were designed. The F3 and B3 primers were able to diagnose species-specific in general and multiplex PCR, and specifically reacted within the inner primers in LAMP assay. The optimal incubation condition of the LAMP assay was 61 □ for 60 minutes with four LAMP primers, though additional loop primer, BF and LF, did not significantly shorten the amplification time. The broad range of DNA concentration was workable in LAMP assay, in which the minimum detectable DNA concentration was 100 pg. Here, DNA releasing method was applied which took five minutes of incubation at 95 □ without the DNA extraction process, and only some pieces of tissue from larvae and adult samples were needed. The incidence of invasive pests is gradually diversifying, therefore, this simple and accurate LAMP assay possibly applied in the intensive field monitoring for the invasive pests and integrated management of Mythimna loreyi.

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Voltage-dependent calcium channels in the corpora allata of the adult male loreyi leafworm, Mythimna loreyi

Cited by 6 publications

References 38 publications

Critical role of nitric oxide-cGMP cascade in the formation of cAMP-dependent long-term memory

Critical role of nitric oxide-cGMP cascade in the formation of cAMP-dependent long-term memory

Ca2+ signaling in prothoracicotropic hormone-stimulated prothoracic gland cells of Manduca sexta: Evidence for mobilization and entry mechanisms

Development of a species diagnostic molecular tool for an invasive pest,Mythimna loreyiusing LAMP

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