The glycogenolytic effect of the corpus cardiacum on the cockroach nerve cord

Hart, D.; Steele, J.E.

doi:10.1016/0022-1910(73)90162-5

Cited by 28 publications

(2 citation statements)

References 23 publications

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“…A similar result for cAMP is given by Deguchi & Axelrod (1972) and Klein & Weller (1972). Moreover, Hart & Steele (1973) reported an inhibition of 5-HT on cAMP activity in the cockroach.…”

Section: The Ratio O[ Asparagine and Glutaminesupporting

confidence: 81%

FUNCTIONAL SIGNIFICANCE OF INDOLE ALKYLAMINES LINKED TO NUTRITIONAL FACTORS IN WING DEVELOPMENT OF THE APHID MYZUS PERSICAE

Harrewijn¹

1973

Entomologia Exp Applicata

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Presumptive alatiform larvae deposited by groups of plant‐reared apterous Myzus persicae can be diverted to an apterous course of development on artificial diets, which, although providing all essential nutrients, have an amino nitrogen ratio suboptimal for growth. These results are in contradiction to a widely accepted assumption that poor nutrition induces alata‐production. Experiments with a newly developed continuous‐flow artificial feeding apparatus for aphids showed that a nutritionally imbalanced diet may indeed favour wing production in case such a diet stimulates restlessness of the aphids. The tendency to follow an apterous course of development can be neutralized by inhibitors of the synthesis of indole alkylamines in new‐born larvae, reared under conditions of controlled crowding stimuli. The possible significance of monoamine metabolism in wing formation of M. persicae is discussed. Résumé SIGNIFICATION FONCTIONNELLE DES INDOL‐ALKYLAMINES JOINTS AUX ÉLÉMENTS NUTRITIFS POUR LA FORMATION DES AILES DE MYZUS PERSICAE Des larves présumées alatiformes, nées d'apTÈres de Myzus persicae élevées sur des plantes, peuvent donner des apTÈres quand elles sont transférées sur des milieux artificiels d'une composition appropriée. Ces milieux contiennent tous les éléments nutritifs essentiels pour la croissance, seule la proportion des acides aminés est suboptimale. Ces résultats sont en contradiction avec l'opinion générale qu'une nutrition déficiente a pour conséquence la production d'alatiformes. À l'aide d'un appareil nouvellement mis au point et avec lequel il est possible d'assurer une alimentation continue des pucerons, on a pu mettre en évidence que la production d'alatiformes est possible sur un milieu nutritif suboptimal, mais il s'est révélé que cela est dû à l'augmentation de l'agitation des larves. Dans les larves nouvellement nées et élevées dans des conditions d'une surpopulation contrôlée, la tendance des pucerons à devenir apTÈres peut être neutralisés par des inhibiteurs de la synthèse des indol‐alkylamines. L'importance du metabolisme des mono‐amines dans la formation des ailes est discuTÉe.

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“…A similar result for cAMP is given by Deguchi & Axelrod (1972) and Klein & Weller (1972). Moreover, Hart & Steele (1973) reported an inhibition of 5-HT on cAMP activity in the cockroach.…”

Section: The Ratio O[ Asparagine and Glutaminesupporting

confidence: 81%

FUNCTIONAL SIGNIFICANCE OF INDOLE ALKYLAMINES LINKED TO NUTRITIONAL FACTORS IN WING DEVELOPMENT OF THE APHID MYZUS PERSICAE

Harrewijn¹

1973

Entomologia Exp Applicata

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“…Injection of corpus cardiacum extract in Locusta migratoria evokes in the fat body an increase in c-AMP level (G~ide & Holwerda, 1976), an activation of a protein kinase as well as a stimulation of phosphorylase activity (Beenakkers et al, 1978). In nerve cord of Periplaneta americana phosphorylase activity can be raised not only by corpora cardiaca extract but also by c-AMP or by the PDE inhibitor caffeine (Hart & Steele, 1973). Robinson & Goldsworthy (1977) found that corpora cardiaca extract stimulated lipid utilization in the flight muscle of Schistocerca gregaria, together with a reduction of the glycolytic flux; the process involved is still unclear.…”

Section: Discussionmentioning

confidence: 99%

Involvement of cyclic nucleotides in locust flight muscle metabolism

Worm

1980

Comparative Biochemistry and Physiology Part C: Comparative Pha

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Abstract--1. Flight had no significant effect on the levels of c-AMP or c-GMP in the flight muscles of Locusta mioratoria.2. Injections of 0.01 or 0.1 corpus cardiacum equivalents into the abdominal cavity did not elicit any effect on cyclic nucleotide levels either.3. Injection of A23187 resulted in a decrease of the c-AMP level, but not the c-GMP level. 4. Marked increase of the c-AMP level was found to occur in the flight muscles after injection of octopamine, whereas c-GMP level was not influenced.5. It is concluded that octopamine acts on locust flight muscles through c-AMP mediated activation of glycogen phosphorylase.

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Neuroparsin: A new energetic neurohormone in the African locust

Moreau

Gourdoux

Girardie³

1988

Arch Insect Biochem Physiol

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The effects of neuroparsins on hemolymph trehalose and lipid levels and o n total glycogen content were analyzed in Locusta migratoria. Saline and methanol extracts of the two lobes of the corpora cardiaca were assayed. Neuroparsins (A and B) were demonstrated to be hypertrehalosemic and hyperlipemic proteins of the neural lobe. Both of these metabolic activities of neuroparsins were somewhat less potent than those of adipokinetic hormone (AKH). Neuroparsin activity could be distinguished from AKH by blockage with an antiserum specific to neuroparsin. The hypertrehalosemic response induced by neuroparsins, in contrast to that of AKH, appeared to occur without a decrease of total glycogen content. The differential modes of action of AKH and neuroparsins could contribute to the fine modulation of carbohydrate metabolism in Locusta migratoria.

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The glycogenolytic effect of the corpus cardiacum on the cockroach nerve cord

Cited by 28 publications

References 23 publications

FUNCTIONAL SIGNIFICANCE OF INDOLE ALKYLAMINES LINKED TO NUTRITIONAL FACTORS IN WING DEVELOPMENT OF THE APHID MYZUS PERSICAE

FUNCTIONAL SIGNIFICANCE OF INDOLE ALKYLAMINES LINKED TO NUTRITIONAL FACTORS IN WING DEVELOPMENT OF THE APHID MYZUS PERSICAE

Involvement of cyclic nucleotides in locust flight muscle metabolism

Neuroparsin: A new energetic neurohormone in the African locust

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