Growth of the prothoracic H-organ in larvae of Galleria

Bhargava, Sudhir; Sláma, Karel

doi:10.1016/0022-1910(87)90104-1

Cited by 2 publications

(1 citation statement)

References 2 publications

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“…This large organ is located on dorsal surface of the nerve cord between SG and TG1. Originally, it has been described in larval and pupal stages of several moth species [51,52] and in nymphs of locusts [53] , but its function is enigmatic. Although it may resemble neurohemal transverse nerves attached to the posterior side of each ventral ganglion, it apparently does not contain any known neuropeptides (this study) or axonal fibers [54].…”

Section: Possible Ethr Roles In Peripheral Organsmentioning

confidence: 99%

Identification and Function of ETH Receptor Networks in The Silkworm Bombyx Mori

Daubnerová¹,

Roller²,

Satake

et al. 2021

Preprint

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Insect ecdysis triggering hormones (ETHs) released from endocrine Inka cells act on specific neurons in the central nervous system (CNS) to activate the ecdysis sequence. These primary target neurons express distinct splicing variants of ETH receptor (ETHR-A or ETHR-B). Here, we characterized both ETHR subtypes in the moth Bombyx mori in vitro and mapped spatial and temporal distribution of their expression within the CNS and peripheral organs. In the CNS, we detected non-overlapping expression patterns of each receptor isoform which showed dramatic changes during metamorphosis. Most ETHR-A and a few ETHR-B neurons produce multiple neuropeptides which are downstream signals for the initiation or termination of various phases during the ecdysis sequence. We also described novel roles of different neuropeptides during these processes. Careful examination of peripheral organs revealed ETHRs expression in specific cells of the frontal ganglion (FG), corpora allata (CA), H-organ and Malpighian tubules prior to each ecdysis. These data indicate that PETH and ETH are multifunctional hormones that act via ETHR-A and ETHR-B to control various functions during the entire development - the ecdysis sequence and associated behaviors by the CNS and FG, JH synthesis by the CA, and possible activity of the H-organ and Malpighian tubules.

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Section: Possible Ethr Roles In Peripheral Organsmentioning

confidence: 99%

Identification and Function of ETH Receptor Networks in The Silkworm Bombyx Mori

Daubnerová¹,

Roller²,

Satake

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

Identification and function of ETH receptor networks in the silkworm Bombyx mori

Daubnerová

Roller

Satake

et al. 2021

Sci Rep

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Insect ecdysis triggering hormones (ETHs) released from endocrine Inka cells act on specific neurons in the central nervous system (CNS) to activate the ecdysis sequence. These primary target neurons express distinct splicing variants of ETH receptor (ETHR-A or ETHR-B). Here, we characterized both ETHR subtypes in the moth Bombyx mori in vitro and mapped spatial and temporal distribution of their expression within the CNS and peripheral organs. In the CNS, we detected non-overlapping expression patterns of each receptor isoform which showed dramatic changes during metamorphosis. Most ETHR-A and a few ETHR-B neurons produce multiple neuropeptides which are downstream signals for the initiation or termination of various phases during the ecdysis sequence. We also described novel roles of different neuropeptides during these processes. Careful examination of peripheral organs revealed ETHRs expression in specific cells of the frontal ganglion (FG), corpora allata (CA), H-organ and Malpighian tubules prior to each ecdysis. These data indicate that PETH and ETH are multifunctional hormones that act via ETHR-A and ETHR-B to control various functions during the entire development—the ecdysis sequence and associated behaviors by the CNS and FG, JH synthesis by the CA, and possible activity of the H-organ and Malpighian tubules.

show abstract

Growth of the prothoracic H-organ in larvae of Galleria

Cited by 2 publications

References 2 publications

Identification and Function of ETH Receptor Networks in The Silkworm Bombyx Mori

Identification and Function of ETH Receptor Networks in The Silkworm Bombyx Mori

Identification and function of ETH receptor networks in the silkworm Bombyx mori

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