Regulation of hemolymph trehalose level by an insulin-like peptide through diel feeding rhythm of the beet armyworm, Spodoptera exigua

Kim, Yonggyun; Hong, Youkyeong

doi:10.1016/j.peptides.2015.02.003

Cited by 36 publications

(32 citation statements)

References 56 publications

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“…Although ILP2 expression did not show a clear change in expression with the increase of temperature, this neuropeptide exhibited the highest expression level in the different samples. The ILP2 was reported to control haemolymph trehalose levels in L5 larvae of S. exigua (Kim and Hong, 2015). This suggests that, among the different ILPs, ILP2 could be playing a major role in larval growth and development.…”

Section: Effect Of Light and Temperature On Neuropeptide Expressionmentioning

confidence: 99%

Identification and expression analysis of the Spodoptera exigua neuropeptidome under different physiological conditions

Llopis-Giménez

Han

Kim

et al. 2018

Insect Molecular Biology

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Neuropeptides are small signalling molecules acting as neurohormones, neurotransmitters and neuromodulators. Being part of the chemical communication system between cells within an organism, they are involved in the regulation of different aspects of animal physiology and behaviour such as feeding, reproduction, development and locomotion. Transcriptomic data from larval and adult tissues have been obtained and mined to generate a comprehensive neuropeptidome for the polyphagous insect pest Spodoptera exigua. Sixty-three neuropeptides have been identified and described based on their tissue specificity and their regulation in response to different abiotic perturbations. Expression analyses have identified those neuropeptides involved in ingestive and digestive behaviour of S. exigua larvae and revealed a general pattern of upregulation in the midgut during larval starvation. Our results represent a comprehensive neuropeptidome of a lepidopteran species that will be highly relevant to future studies and provide novel information of the insect's perception of its environment.

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Section: Effect Of Light and Temperature On Neuropeptide Expressionmentioning

confidence: 99%

Identification and expression analysis of the Spodoptera exigua neuropeptidome under different physiological conditions

Llopis-Giménez

Han

Kim

et al. 2018

Insect Molecular Biology

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“…They can also lower blood glucose levels in rats (Sajid et al, ). Reciprocally, mammalian insulins can bind to Drosophila InR with moderate affinity (Kim & Hong, ; Petruzzelli, Herrera, Garcia‐Arenas, & Rosen, ). In most known insects, only one type of InR has been identified except that Apis mellifera , Tribolium castaneum , and Solenopsis invicta contain two isoforms (Lu & Pietrantonio, ).…”

Section: Introductionmentioning

confidence: 99%

Insulin‐like peptides of the legume pod borer, Maruca vitrata, and their mediation effects on hemolymph trehalose level, larval development, and adult reproduction

Baki

Lee

Jung

et al. 2018

Arch Insect Biochem Physiol

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Insulin-like peptides (ILPs) of insects mediate various physiological processes including hemolymph sugar level, immature growth, female reproduction, and lifespan. In target cells of ILPs, insulin/insulin-like growth factor signaling (IIS) is highly conserved in animals. IIS in the legume pod borer, Maruca vitrata (Lepidoptera: Crambidae), is known to be involved in maintaining hemolymph trehalose levels and promoting larval growth. However, ILPs in M. vitrata have not been reported yet. This study predicted two ILP genes of Mv-ILP1 and Mv-ILP2 from transcriptome of M. vitrata. Mv-ILP1 and Mv-ILP2 shared high sequence homologies and domain architecture with Drosophila ILPs. Both ILPs exhibited similar expression patterns in most developmental stages, showing high expression levels in adult stage. In the larval stage, Mv-ILP1 and Mv-IlP2 were expressed mostly in the brain and fat body. However, in the adult stage, both ILP genes were expressed more in the abdomen than those in the head containing the brain. RNA interference (RNAi) of either Mv-ILP1 or Mv-ILP2 during larval stage resulted in significant malfunctioning in regulating hemolymph trehalose titers. RNAi-treated larvae also exhibited significant retardation of larval growth. RNAi treatment in adult stage interfered with the ovarian development of females. These results suggest that Mv-ILP1 and Mv-ILP2 play crucial roles in mediating larval growth and adult reproduction.

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“…Immature development of insects depends on trehalose availability (Matsuda, Yamada, Yoshida, & Nishimura, ). Its hemolymph titers in S. exigua are tightly regulated by insulin‐like peptide and hypertrehalosemic hormone (HTH; Kim & Hong, ; Park & Kim, ). Sun and Steele () have reported iPLA 2 ‐like activity in fat body cell extracts of American cockroach ( Periplaneta americana ).…”

Section: Discussionmentioning

confidence: 99%

Toll/IMD signal pathways mediate cellular immune responses via induction of intracellular PLA₂ expression

Sajjadian

Vatanparast

Kim

2019

Arch Insect Biochem Physiol

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Regulation of hemolymph trehalose level by an insulin-like peptide through diel feeding rhythm of the beet armyworm, Spodoptera exigua

Cited by 36 publications

References 56 publications

Identification and expression analysis of the Spodoptera exigua neuropeptidome under different physiological conditions

Identification and expression analysis of the Spodoptera exigua neuropeptidome under different physiological conditions

Insulin‐like peptides of the legume pod borer, Maruca vitrata, and their mediation effects on hemolymph trehalose level, larval development, and adult reproduction

Toll/IMD signal pathways mediate cellular immune responses via induction of intracellular PLA₂ expression

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Regulation of hemolymph trehalose level by an insulin-like peptide through diel feeding rhythm of the beet armyworm, Spodoptera exigua

Cited by 36 publications

References 56 publications

Identification and expression analysis of the Spodoptera exigua neuropeptidome under different physiological conditions

Identification and expression analysis of the Spodoptera exigua neuropeptidome under different physiological conditions

Insulin‐like peptides of the legume pod borer, Maruca vitrata, and their mediation effects on hemolymph trehalose level, larval development, and adult reproduction

Toll/IMD signal pathways mediate cellular immune responses via induction of intracellular PLA2 expression

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Toll/IMD signal pathways mediate cellular immune responses via induction of intracellular PLA₂ expression