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Corpora Allata (0):
Recent article
Corpora Allata
Parasitology (95 ( Pt 1))01 2009
Abstract
Several of the pathophysiological responses made by the beetle Tenebrio molitor, when infected with metacestodes of Hymenolepis diminuta, may be attributed to a parasite-induced reduction in host juvenile hormone titre. It has been suggested that production of this hormone by the corpora allata may...
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PMID: 3670902
PDF is available here.
PDF is available here.
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Bioscience Reports (29)2 2009
Abstract
We utilized a proteomic approach to investigate the fifth instar prothoracic gland during the growth and development of the silkworm, Bombyx mori L. The two-dimensional electrophoresis results showed that the majority of proteins were acidic proteins, especially concentrated in the area of 25-65 kDa...
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PMID: 18715222
PDF is available here.
PDF is available here.
Abstract
The morphology and functions of the brain neurons projecting to the retrocerebral complex were examined in terms of photoperiodic control of adult diapause in the bean bug, Riptortus pedestris. Backfills through the nervi corporis cardiaci stained 15-20 pairs of somata in the pars intercerebralis (P...
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PMID: 18546002
PDF is available here.
PDF is available here.
Abstract
We report on the functional characterization of the CG17330/DmJHAMT gene in the fruit fly Drosophila melanogaster. Recombinant DmJHAMT protein expressed in Escherichia coli catalyzes the conversion of farnesoic acid and JH III acid to their cognate methyl esters in the presence of SAM. DmJHAMT is pr...
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PMID: 18549957
PDF is available here.
PDF is available here.
Abstract
This mass spectrometric study confines itself to peptide masses in the range of 500-1500Da. Adipokinetic hormones (AKHs) that are predicted from the genome of the red flour beetle, Tribolium castaneum, and the silk moth, Bombyx mori, are shown to exist as expressed peptides in the corpora cardiaca (...
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PMID: 18448200
PDF is available here.
PDF is available here.
Abstract
The cockroach allatostatin receptor (Dippu-AstR) is a 425 amino acid G-protein coupled receptor that is related to the mammalian galanin receptor. Using relative standard curve real-time PCR analysis, changes in Dippu-AstR mRNA expression levels were examined in tissues of adult mated and virgin fem...
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PMID: 18541258
PDF is available here.
PDF is available here.
Abstract
I (AKH I) from the corpus cardiacum (CC) and also alter juvenile hormone (JH) biosynthesis and release from the corpus allatum (CA). Dippu-AST-like immunoreactivity is found within lateral neurosecretory cells (LNCs) of the brain and axons within the paired nervi corporis cardiaci II (NCC II) to the...
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PMID: 18479700
PDF is available here.
PDF is available here.
Abstract
Immunoreactivity to cockroach Diploptera punctata allatostatin-7 (Dippu AST-7) has been demonstrated previously in axons innervating the corpora allata of the termite Reticulitermes flavipes. This peptide and Dippu AST-11 inhibited juvenile hormone (JH) synthesis by corpora allata (CA) of brachypter...
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PMID: 18387628
PDF is available here.
PDF is available here.
Abstract
Allatoregulatory peptides either inhibit (allatostatins) or stimulate (allatotropins) juvenile hormone (JH) synthesis by the corpora allata (CA) of insects. However, these peptides are pleitropic, the regulation of JH biosynthesis is not their only function. There are currently three allatostatin fa...
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PMID: 18377924
PDF is available here.
PDF is available here.
Journal of Experimental Biology (211)Pt 10 2008
Abstract
We demonstrate a strong reduction in reproductive output in the tropical butterfly Bicyclus anynana and the Mediterranean field cricket Gryllus bimaculatus caused by the NMDA receptor antagonist MK-801. Such inhibiting effects on reproduction could be overruled by the application of JH mimics. In G....
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PMID: 18456886
PDF is available here.
PDF is available here.
Cell and Tissue Research (331)3 2008
Abstract
We have investigated the developmental regulation of Crz expression and the morphology of corazonergic neurons. From late embryo to larva, Crz expression is consistently detected in three neuronal groups: dorso-lateral Crz neurons (DL), dorso-medial Crz neurons (DM), and Crz neurons in the ventral n...
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PMID: 18087727
PDF is available here.
PDF is available here.
Abstract
Abstract
The strong magnetic field influence characteristics of protocerebral neurosecretory neurons and corpora allata in the late Tenebrio molitor pupae....
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PMID: 18246478
PDF is available here.
PDF is available here.
Abstract
Workers of Reticulitermes flavipes were isolated in groups of increasing numbers to determine the in vitro rates of juvenile hormone (JH) synthesis by individual pairs of corpora allata (CA) as other castes differentiated. Only neotenic reproductives developed in groups of 12. Mean JH synthesis rate...
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PMID: 18187146
PDF is available here.
PDF is available here.
Abstract
We hypothesized that similar allatostatin receptors exist in the cockroach Diploptera punctata that may regulate the numerous effects that this family of peptides exerts on a range of target tissues. The polymerase chain reaction (PCR) was used, with primer design based on the Drosophila allatostati...
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PMID: 18237821
PDF is available here.
PDF is available here.
Abstract
Juvenile hormones (JHs) are key regulators of both metamorphosis and adult reproductive processes. Farnesoic acid O-methyltransferase (FAMeT) is thought to be an important enzyme in the JH biosynthetic pathway, catalyzing methylation of farnesoic acid (FA) to methyl farnesoate (MF). Previous evidenc...
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PMID: 18242777
PDF is available here.
PDF is available here.
Abstract
I compared JH and MF biosynthesis and release in several cockroach species of known phylogenetic relationships. Using a radiochemical assay, the present research showed that cockroach embryos representing all three reproductive modes produced and released both JH and MF, as previously shown for B. g...
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PMID: 18000875
PDF is available here.
PDF is available here.
Abstract
We have isolated the cDNAs of all enzymes involved in the mevalonate pathway portion of the juvenile hormone (JH) biosynthetic pathway in Bombyx mori, i.e., those responsible for the formation of farnesyl diphosphate from acetyl-CoA. There is a single gene encoding each enzyme of this pathway, with...
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PMID: 17628279
PDF is available here.
PDF is available here.
Abstract
Harnessing of the Drosophila genetic system toward ascertaining the molecular endocrinology of higher dipteran (cyclorrhaphan) larval development has been a goal for over 70 years, beginning with the data left to us by pioneer researchers from the classical endocrine era. The results of their experi...
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PMID: 17628277
PDF is available here.
PDF is available here.
Abstract
The evidence relating feeding and mating to hormonal control of egg production in Rhodnius prolixus is reviewed from two perspectives. It identifies crucial areas in which information is lacking, and it attempts to relate the findings, most of which have been obtained on laboratory colonies isolated...
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PMID: 17126364
PDF is available here.
PDF is available here.
Abstract
We investigated what role JH, allatotropin (AT) and other head-factors play in the regulation of previtellogenic ovarian development and adult survivorship. Factors from the head are essential for corpora allata (CA) activation and reproductive maturation. We have shown that decapitation of females...
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PMID: 17070832
PDF is available here.
PDF is available here.
Entomology (52) 2007
Abstract
Allatostatins are pleiotropic neuropeptides for which one function in insects is the inhibition of juvenile hormone synthesis. Juvenile hormone, an important regulator of development and reproduction in insects, is produced by the corpora allata. Mandibular organs, the crustacean homologs of insect...
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PMID: 16968202
PDF is available here.
PDF is available here.
Abstract
We found subtle differences between larval and adult preparations, including metal and detergent preference, and while larval prenyltransferase activity was strictly cytosolic, prenyltransferase derived from adult CA was found in both the cytosolic and pellet fractions. Differences in kinetics as a...
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PMID: 17175444
PDF is available here.
PDF is available here.
Journal of Biological Chemistry (281)45 2006
Abstract
Aedes aegypti PISCF-allatostatin or allatostatin-C (Ae-AS-C) was isolated using a combination of high performance liquid chromatography and enzyme-linked immunosorbent assay (ELISA). The matrix-assisted laser desorption/ionization time-of-flight (TOF) mass spectrum of positive ELISA fractions reveale...
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PMID: 16968697
PDF is available here.
PDF is available here.
Abstract
These results indicate that CA can be directly and stably stimulated by a stage-specific peptidergic ovarian factor....
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PMID: 16890239
PDF is available here.
PDF is available here.
Abstract
We analyzed ESTs from the glands producing JH, the corpora allata (CA) in the cockroach Diploptera punctata, an insect long used as a physiological model species and compared them with ESTs from the CA of the mosquitoes Aedes aegypti and Anopheles albimanus. The predicted genes were analyzed accordi...
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PMID: 16551550
PDF is available here.
PDF is available here.
Abstract
We measured the individual in vitro rate of juvenile hormone (JH) production of excised corpora allata, and the ecdysteroid titer of pooled hemolymph samples. Production of JH was highest in low-ranking workers, intermediate in high rankers, and almost undetectable in alphas. Ecdysteroid titers were...
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PMID: 16283330
PDF is available here.
PDF is available here.
Abstract
I release (determined by RP-HPLC) from the locust CC over a range of doses with threshold above 10(-8)M and maximal release at about 10(-7)M proctolin. Isolated glandular lobes of the CC released greater amounts of AKH I following treatment with proctolin and in these studies AKH II was also release...
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PMID: 16309785
PDF is available here.
PDF is available here.
Abstract
The neuropeptide profiles and diversity of the brain and retrocerebral organs (corpora cardiaca-corpora allata; CC-CA) of adult workers of the honey bee Apis mellifera carnica (dark European strain) were investigated using a combination of HPLC and matrix-assisted laser desorption ionization-time of...
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PMID: 16309791
PDF is available here.
PDF is available here.
Abstract
The levels of three alternatively spliced mRNAs from the Manduca sexta allatotropin (Manse-AT) gene were determined following physiological manipulations during the larval, pupal and adult stages; starvation of larvae, induction of pupal diapause and adult mating experience. The juvenile hormone bio...
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PMID: 16488512
PDF is available here.
PDF is available here.
Journal of Experimental Biology (209)Pt 4 2006
Abstract
We manipulated the quantity of larval food and measured in vitro production of juvenile hormone (JH) by corpora allata (CA) and ecdysteroids by ovaries. Newly emerged A. aegypti contain lower larval-derived protein reserves, and their CA produce high amounts of JH, in comparison with similarly stage...
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PMID: 16449559
PDF is available here.
PDF is available here.
Abstract
Autocrine activation of DNA synthesis in prothoracic gland cells in last instar larvae of the silkworm, Bombyx mori, was studied using both a long-term in vitro organ culture system and immunocytochemical labeling with 5-bromo-2'-deoxyuridine (BrdU). When prothoracic glands were incubated in a small...
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PMID: 16266718
PDF is available here.
PDF is available here.
Journal of Insect Physiology (51)11 2005
Abstract
We studied changes in the endocrinology and ovarian maturation in primary reproductive females of the dampwood termite Zootermopsis angusticollis following their release from inhibitory stimuli produced by mature queens. Winged alates were removed from their natal nest, manually dewinged, then paire...
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PMID: 16081092
PDF is available here.
PDF is available here.
Abstract
We previously reported that mutants of InR had reduced JH synthesis as young adults, and that normal longevity and vitellogenesis were restored by topical application of a JH analog [Science 292 (2001) 107]. Here, we describe the 10-day adult age course of JH synthesis from isolated corpus allatum (...
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PMID: 15935161
PDF is available here.
PDF is available here.
Abstract
In the subterranean termite Reticulitermes flavipes, allatostatins (ASTs) with the C-terminus Phe-Gly Leu-amide were localized by immunocytochemistry with antibody against a cockroach AST, Dippu AST-7. AST-immunoreactivity occurred in the corpus cardiacum and corpus allatum and in the lateral and me...
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PMID: 15890178
PDF is available here.
PDF is available here.
Abstract
We found that the P. bioculatus CA-CC complex is present in two distinct morphological forms, the more frequently observed complex containing one "fused" CA between two CCs and the more rarely observed complex having one CA laterally attached to each CC. These complexes were tested for their ability...
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PMID: 16029075
PDF is available here.
PDF is available here.
Abstract
We report that protein content decreases, whereas Golgi population, lysosomal content and autophagic activities increase with decrease in CA cell size. Also, the concentration of cyclic GMP (cGMP) is low in large cells and high in small cells. Results of treating CA with ovarian tissue suggest that...
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PMID: 15607654
PDF is available here.
PDF is available here.
Abstract
We compared the effects of Manduca sexta allatotropin (Manse-AT) on the rate of in vitro juvenile hormone (JH) biosynthesis by the corpora allata (CA) of different-aged virgin females from migrant (Quebec) and non-migrant (Azores) populations of the armyworm, Pseudaletia unipuncta, as well as from e...
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PMID: 15686646
PDF is available here.
PDF is available here.
Abstract
Our data suggest that the lubber CA is largely regulated by AT activity, and that JH synthesis reflects both CA response to AT activity and the level of AT activity in the brain....
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PMID: 15626505
PDF is available here.
PDF is available here.
Abstract
The degradation of synthetic Manduca sexta allatostatin (Manse-AS) and allatotropin (Manse-AT) by enzymes associated with the corpus allatum (CA) of larvae of the tomato moth, Lacanobia oleracea, was investigated using reversed-phase high performance liquid chromatography and matrix-assisted laser d...
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PMID: 15540276
PDF is available here.
PDF is available here.
Journal of Insect Physiology (50)12 2004
Abstract
We investigated the role of the parasitoid larvae in JH synthesis and release by in vitro and in vivo experiments. GC-MS analyses confirmed that the rising hemolymph JH titer coincided with the time at which the parasitoids molt to the second larval instar. Peak values in host hemolymph titers were...
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PMID: 15670865
PDF is available here.
PDF is available here.
Abstract
Abdominal motoneurones of the locust Locusta migratoria were investigated in immature, mature and allatectomised females to compare their response characteristics during reproductive development. These motoneurones were chosen because they control muscles which are involved in extreme lengthening du...
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PMID: 15322846
PDF is available here.
PDF is available here.
Cell and Tissue Research (318)2 2004
Abstract
Morphological and electrical properties of neurons with somata in the pars intercerebralis (PI) and pars lateralis (PL) were examined by intracellular recording and staining in the adult blow fly, Protophormia terraenovae. According to the location of somata and fiber distribution, two types of PI n...
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PMID: 15322913
PDF is available here.
PDF is available here.
Abstract
Brain-derived neurotrophic factor-like neuropeptide is produced in the brain of the silk moth, Bombyx mori. Immunocytochemical studies of brain and retrocerebral complex of larvae, prepupae, pupae and adults showed that four pairs of median neurosecretory cells and six pairs of lateral neurosecretor...
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PMID: 15501520
PDF is available here.
PDF is available here.
Journal of Insect Physiology (50)10 2004
Abstract
The study showed that the amounts of the total proteins and 53 kDa protein in male accessory glands (AGs) of the firebug Pyrrhocoris apterus (L.) increased with age of the adult life. The 53 kDa protein, the most abundant polypeptide detected in the secretion of the AGs, and some other smaller pepti...
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PMID: 15518657
PDF is available here.
PDF is available here.
Journal of Experimental Biology (207)Pt 15 2004
Abstract
We investigated the relationship among nutritional reserves, previtellogenic ovary development and juvenile hormone (JH) synthesis in Aedes aegypti female mosquitoes. By raising larvae under different nutritional regimes, two adult phenotypes (large and small females) were generated, which differed...
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PMID: 15201301
PDF is available here.
PDF is available here.
Regulatory Peptides (118)3 2004
Abstract
We investigated the role of head factors and allatostatins (ASs) on the regulation of juvenile hormone (JH) synthesis in female adult mosquito. The biosynthetic activity of the Aedes aegypti corpora allata (CA) in vitro was inhibited by factors present in the head. Disconnecting the CA from the brai...
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PMID: 15003834
PDF is available here.
PDF is available here.
Abstract
We thus report the cloning and functional expression of a gene involved in an insect-specific step of juvenile hormone biosynthesis. Heterologously expressed CYP15A1 from D. punctata or its ortholog from economically important species may be useful in the design and screening of selective insect con...
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PMID: 15024118
PDF is available here.
PDF is available here.
Abstract
We investigated the relationship between reproductive dominance, size of the corpora allata (CA, producer of Juvenile Hormone, JH) and the proportions of cuticular hydrocarbons present on the cuticle in overwintering foundresses and both associative (polygynous) and solitary (monogynous) pre-emergen...
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PMID: 15037095
PDF is available here.
PDF is available here.
Journal of Insect Physiology (50)2-3 2004
Abstract
Endocrine regulation of corpus allatum (CA) cell proliferation in response to chilling was studied in mated females of the Hawaiian cockroach, Diploptera punctata. Chilling alone, when applied 24 h post-mating, suppressed CA cell division, and elevated ecdysteroid levels in Diploptera's haemolymph....
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PMID: 15019522
PDF is available here.
PDF is available here.
Journal of Insect Physiology (50)2-3 2004
Abstract
Pupal commitment of the wing imaginal disc of the silkworm, Bombyx mori, is completed shortly after the final (fifth) larval ecdysis. Pupal commitment was induced by in vitro culture with 20-hydroxyecdysone (20E). Shortly after the head capsule slippage (HCS) that occurs approximately 24 h before th...
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PMID: 15019513
PDF is available here.
PDF is available here.
Abstract
The corpus allatum (CA) of adult female Ceratitis capitata produces methyl palmitate (MP) in vitro, in addition to JHB(3) and JH III. Biosynthesized MP migrates on TLC and co-elutes from RP-18 HPLC with synthetic MP. Its identity is verified herein by GCMS. MP production is up-regulated twofold by m...
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PMID: 14599501
PDF is available here.
PDF is available here.
Abstract
We aimed to elucidate why cockroaches do not produce vitellogenin in immature stages, by studying the appearance of vitellogenin mRNA in larvae of Blattella germanica. Treatment of female larvae in any of the last three instars with 1 microg of juvenile hormone (JH) III induces vitellogenin gene tra...
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PMID: 14599494
PDF is available here.
PDF is available here.
Abstract
We compared the effects of PTTH, dibutyryl cyclic AMP (dbcAMP), a cAMP phosphodiesterase inhibitor (IBMX), juvenile hormone analogue (JHA) and 20-hydroxyecdysone (20E) on secretory activity of the third, fourth and fifth instar glands. Among the factors examined, feedback inhibition by 20E was indic...
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PMID: 14599491
PDF is available here.
PDF is available here.
Abstract
We dissected the corpora allata-corpora cardiaca (CA-CC) complex attached to a piece of aorta. The complex was left connected to the intact head capsule to facilitate the visualization and transfer of the glands. A linear increase in the cumulative amount of biosynthesized JH III was found for at le...
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PMID: 14599502
PDF is available here.
PDF is available here.
Journal of Neurobiology (57)2 2003
Abstract
We explored the stability of this neuropil expansion and its possible dependence on JH. We studied the volume of the mushroom bodies in adult bees deprived of JH by surgical removal of the source glands, the corpora allata. We also asked if the neuropil expansion detected in foragers persists when b...
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PMID: 14556280
PDF is available here.
PDF is available here.
Journal of Insect Physiology (49)11 2003
Abstract
We investigated the effect of fifteen 1,5-disubstituted imidazoles (1,5-dis) on juvenile hormone III (JH III) and methyl farnesoate (MF) biosynthesis by the corpora allata (CA) of the mosquito Aedes aegypti in vitro. Four compounds (TH-35, TH-83, TH-62 and TH-28) significantly decreased JH biosynthe...
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PMID: 14568578
PDF is available here.
PDF is available here.
Journal of Insect Physiology (49)11 2003
Abstract
We extend these observations to juvenile hormone (JH) to determine if parasitism by this wasp affects other endocrine systems. To this end, we compared the production of JH by corpora cardiaca-corpora allata complexes (CC-CA), the metabolism of JH by haemolymph enzymes, and the haemolymph titre of J...
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PMID: 14568580
PDF is available here.
PDF is available here.
Cell and Tissue Research (314)2 2003
Abstract
Peptidergic innervation of the corpus cardiacum/corpus allatum (CC/CA) retrocerebral complex, and neurosecretory areas of the brain of the lepidopterans Lacanobia oleracea, Heliothis virescens and Manduca sexta was studied by immunocytochemistry linked to confocal laser scanning microscopy. The patt...
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PMID: 12938035
PDF is available here.
PDF is available here.
Journal of Insect Physiology (49)10 2003
Abstract
Studies were conducted on the physiological and hormonal changes following the release of alates from developmentally suppressive pheromones produced by mature queens of the fire ant Solenopsis invicta Buren. Winged virgin queens were removed from the pheromonal signal and placed in colony fragments...
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PMID: 14511829
PDF is available here.
PDF is available here.