scholarly journals A comparative analysis of corpora allata-corpora cardiaca microRNA repertoires revealed significant changes during mosquito metamorphosis

2018 ◽  
Vol 96 ◽  
pp. 10-18 ◽  
Author(s):  
Marcela Nouzova ◽  
Kayvan Etebari ◽  
Fernando G. Noriega ◽  
Sassan Asgari
Keyword(s):  
Comparative Analysis ◽  
Corpora Allata ◽  
Corpora Cardiaca

Levels of tryptophan, 5-hydroxytryptamine, and dopamine in some tissues of the cockroach Periplaneta americana

1986 ◽  
Vol 64 (12) ◽  
pp. 2669-2673 ◽  
Author(s):  
B. Duff Sloley ◽  
Roger G. H. Downer ◽  
Cedric Gillott
Keyword(s):  
Nervous Tissue ◽  
High Performance ◽  
Periplaneta Americana ◽  
Corpora Allata ◽  
Suboesophageal Ganglion ◽  
Corpora Cardiaca ◽  
Thoracic Ganglia ◽  
Frontal Ganglion ◽  
Low Levels ◽  
Immunohistochemical Studies

Tryptophan, 5-hydroxytryptamine, and dopamine were measured in the frontal ganglion, corpora cardiaca, corpora allata, nerves of the suboesophageal ganglion, nerves of the thoracic ganglia, gut, testes, and ovaries of the cockroach Periplaneta americana using high performance liquid chromatography with electrochemical detection. 5-Hydroxytryptamine was demonstrated in the frontal ganglion, corpora cardiaca, corpora allata, and nerves of the suboesophageal ganglion but not in the gut, testes, ovaries, or nerves of the thoracic ganglia. These results quantitatively confirm immunohistochemical studies of 5-hydroxytryptamine in neurohaemal and nonneuronal tissues of the cockroach. Dopamine was found in all neurohaemal and nervous tissue examined. Dopamine was also found at low levels in the rectum. Tryptophan was found in all tissues examined.

Maturation and Responsiveness to Extracts of Corpora Allata from Male Locusta migratoria containing Allatotropic Factors

1992 ◽  
Vol 47 (5-6) ◽  
pp. 449-452 ◽  
Author(s):  
Elisabeth Lehmberg ◽  
Hans-J. Ferenz ◽  
Shalom W. Applebaum
Keyword(s):  
Juvenile Hormone ◽  
Locusta Migratoria ◽  
Corpora Allata ◽  
Basal Rate ◽  
Corpora Cardiaca

Corpora allata (CA) from male Locusta migratoria were tested for their ability to synthesize juvenile hormone (JH) and to respond to stimulating brain/corpora cardiaca (CC) extracts under in vitro conditions. We found that a preincubation of the CA of both sexes at 4 °C for 24 h lowers their basal rate of synthesis and retains their responsiveness to allatotropic factors. Male CA can be stimulated by brain/CC extracts as well as female CA. JH biosynthesis stimulating factors are also present in male brain/CC extracts. Thus such extracts from male locusts can be used for the isolation of locust allatotropin. Furthermore male locust CA are appropriate for bioassaying such allatotropic factors.

Activity of the Corpora Allata during Pupal Diapause in Mimas tiliae (Lepidoptera)

1958 ◽  
Vol s3-99 (46) ◽  
pp. 171-180
Author(s):  
K.C. HIGHNAM
Keyword(s):  
Low Temperature ◽  
Oxygen Uptake ◽  
Fat Body ◽  
Neurosecretory Cells ◽  
Corpora Allata ◽  
Histological Observation ◽  
Corpora Cardiaca ◽  
Pupal Diapause ◽  
The Brain

Histological observation indicates that the corpora allata of Mimas tiliae are secretory during pupal diapause, but become inactive by the end of the low-temperature period which terminates diapause. Removal of the corpora allata, together with the corpora cardiaca, from the diapausing pupa increases the thickness of the hypodermis and decreases the number of fat-body inclusions (compared with operated controls), but does not result in any visible signs of diapause break. The oxygen uptake of the pupa increases by about 60% by the end of the low-temperature period, compared with the diapausing pupa. It is probable that the corpora allata play some part in the maintenance of diapause, possibly by exercising some control over the fat-body metabolism. This role is subservient to that of the neurosecretory cells in the brain, together with their associated corpora cardiaca.

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