Multifactorial control of the release of hormones from the locust retrocerebral complex

Vullings, H. G. B.; Diederen, J. H. B.; Veelaert, Dirk; Horst, Dick J. Van der

doi:10.1002/(sici)1097-0029(19990501)45:3<142::aid-jemt2>3.0.co;2-d

Cited by 35 publications

(6 citation statements)

References 109 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The CA produces juvenile hormone (JH), a fatty acid derivative which has profound effects on larval growth, metamorphosis, egg development, and sexual behavior (Veelaert et al 1998, Vullings et al 1999, Gilbert et al 2000. The pars lateralis in the brain via its projections to the CA is the source of positive and negative control over JH production (Stay et al 1996, Stay 2000, Siga 2003.…”

Section: Neuroendocrine System Of Arthropodsmentioning

confidence: 99%

The neuroendocrine system of invertebrates: a developmental and evolutionary perspective

Hartenstein¹

2006

Journal of Endocrinology

261

216

View full text Add to dashboard Cite

Neuroendocrine control mechanisms are observed in all animals that possess a nervous system. Recent analyses of neuroendocrine functions in invertebrate model systems reveal a great degree of similarity between phyla as far apart as nematodes, arthropods, and chordates. Developmental studies that emphasize the comparison between different animal groups will help to shed light on questions regarding the evolutionary origin and possible homologies between neuroendocrine systems. This review intends to provide a brief overview of invertebrate neuroendocrine systems and to discuss aspects of their development that appear to be conserved between insects and vertebrates.

show abstract

Section: Neuroendocrine System Of Arthropodsmentioning

confidence: 99%

The neuroendocrine system of invertebrates: a developmental and evolutionary perspective

Hartenstein¹

2006

Journal of Endocrinology

261

216

View full text Add to dashboard Cite

show abstract

“…Flight is the only natural stimulus known to date for release of the AKHs. 30 As a consequence of their colocalization, the three AKHs will be released simultaneously, and also the corresponding APRPs will appear in the hemolymph by this exocytotic process. The resulting multifactorial signal consists of a complex mixture of peptides, likely with a multitude of effects on their targets.…”

Section: Release Of the Akhsmentioning

confidence: 99%

“…The release of the AKHs by the adipokinetic cells appears to be subjected to many regulatory (both stimulatory and inhibitory) substances. 30 The various substances can be of both neural and humoral origin. The neural regulation of the AKH release appears to be limited to about 15 secretomotor neurons in the protocerebrum, which send their axons via the nervi corporis cardiaci II into the glandular part of the corpus cardiacum.…”

Section: Release Of the Akhsmentioning

confidence: 99%

See 1 more Smart Citation

Adipokinetic Hormones: Coupling between Biosynthesis and Release

Oudejans

Harthoorn

Diederen

et al. 1999

Annals of the New York Academy of Sciences

View full text Add to dashboard Cite

During long-distance flight of migratory locusts, the dramatic energy demand of the flight muscles is controlled by three adipokinetic hormones (AKHs). These peptide hormones regulate the mobilization of lipid and carbohydrate stored in the fat body to serve as energy substrates for the flight muscles. Despite the relatively huge quantities of the three AKHs that are stored in the corpora cardiaca, flight induces a differential 2-4-fold increase in the mRNAs for the three hormones. Moreover, newly synthesized AKHs can be released only during a restricted period of time, suggesting that by far most of the stored hormones are physiologically inactive. This raises the question of how the biosynthetic activity in the AKH-producing cells is coupled to their secretory activity. The present review discusses the potential mechanisms by which generation and release of mixtures of bioactive neurohormones are controlled and how peptidergic neuroendocrine cells cope with variations in physiological stimulation, with the AKH-producing cells serving as a model system.

show abstract

“…In insects, DA has been shown to participate in the induction of flight in the moth Manduca (Claasen and Kammer, 1986), the modulation of aggressiveness in crickets (Stevenson et al, 2000), in tarantulas (Punzo and Punzo, 2001), learning, particularly in connection to olfaction (Mercer and Erber, 1983;Menzel and Müller, 1996;Bicker and Menzel, 1989), salivary regulation (Lang and Walz, 1999), the control of release of Adipokinetic Hormone from the corpus cardiacum (Passier et al, 1995;Vullings et al, 1999), and ethanol-induced hyperactivity in Drosophila (Wolf and Heberlein, 2003).…”

Section: Introductionmentioning

confidence: 99%

Dopaminergic Modulation of Neurosecretory Cells in the Crayfish

Álvarez¹,

Villalobos²,

Rosete³

et al. 2005

Cell Mol Neurobiol

View full text Add to dashboard Cite

The main aims of this paper are (a) to locate possible dopaminergic neurons in the eyestalk with anti-tyrosine hydroxylase antibodies, (b) to search for the presence of dopamine (DA) in the nervous structures of the eyestalk, (c) to explore its release, and (d) to test the effect of DA on neurosecretory cells in the eyestalk. Experiments were performed in adult crayfishes Procambarus clarkii, in isolated optic peduncle. Immunocytochemistry was made with the antibody against its precursor synthesizing enzyme tyrosine-hydroxylase. The content and release studies of DA were made using high performance liquid chromatography (HPLC). Extracellular and intracellular recordings were conducted with conventional recording techniques. A large number (approximately 2000) of immunopositive somata of different sizes and shapes were identified in various regions of the eyestalk. The majority of somata are of the smallest size (5-25 microm diameter). DA content in the eyestalk was 5.6 +/- 0.1 pmol per structure; the greatest content is in the MT (over 60%). A basal level release of DA was observed. Incubation of eyestalks in solution containing a high K+ concentration increased the DA release (79%). Two effects of DA on the excitability of X-organ neurons were observed; an excitatory effect on neurons of approximately 25 microm somata diameter and another inhibitory effect in the group of approximately 35-microm somata diameter neurons. The excitation occurs with a depolarization and decrement of membrane conductance in the cell soma while the inhibition occurs with a hyperpolarization and increment of membrane conductance in soma. We concluded the following: (1) Dopamine is present in each optic ganglia of the crayfish eyestalk. (2) There is a basal release of DA from the isolated eyestalk. (3) DA release is enhanced threefold by eyestalk incubation in 40 mM [K+] solution. (4) DA selectively excites a population of neurons with low-speed conduction axons, and small somata in the X-organ-sinus gland system, while inhibiting another population characterized by higher axonal conduction speed and large somata. (5) These observations support a role for DA as a neurotransmitter or neuromodulator in the X-organ neurons of the crayfish eyestalk.

show abstract

Multifactorial control of the release of hormones from the locust retrocerebral complex

Cited by 35 publications

References 109 publications

The neuroendocrine system of invertebrates: a developmental and evolutionary perspective

The neuroendocrine system of invertebrates: a developmental and evolutionary perspective

Adipokinetic Hormones: Coupling between Biosynthesis and Release

Dopaminergic Modulation of Neurosecretory Cells in the Crayfish

Contact Info

Product

Resources

About