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Malpighian Tubules (0):
Recent article
Malpighian Tubules
Abstract
Although circadian rhythms are found in many peripheral tissues in insects, the control mechanism is still to be elucidated. To investigate the central and peripheral relationships in the circadian organization, circadian rhythms outside the optic lobes were examined in the cricket Gryllus bimaculat...
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PMID: 20416318
PDF is available here.
PDF is available here.
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Abstract
We have evaluated the effects of destruxin A, a cyclic peptide produced by Metarhizium anispliae, on Rhodnius prolixus Malpighian tubules measuring fluid secretion rate, transepithelial electrical potential (TEP), pH and ion composition of secreted fluid, and ATP content. Destruxin A dramatically in...
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PMID: 20060849
PDF is available here.
PDF is available here.
Abstract
Our results revealed the importance of conducting toxicological bioassays combined with morphological analyses of the organs of ants chronically exposed to insecticides used in commercial ant baits. In vitro bioassays showed that boric acid significantly decreases the survivorship of workers regardl...
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PMID: 20568613
PDF is available here.
PDF is available here.
Abstract
I organic anions (fluorescein or salicylate) was associated with increased fluid secretion rates and increased fluxes of both salicylate and the type II organic anion methotrexate. By contrast, chronic exposure to dietary methotrexate was associated with increased fluid secretion rate and increased...
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PMID: 20077573
PDF is available here.
PDF is available here.
Neotropical Entomology (39)4 2010
Abstract
Our data show an elevated genetic activity of the MT in the pre-metamorphosis period. The distal region of the MT has the highest observed activity, which may be associated with the re-absorption of useful components and the excretion of waste materials....
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PMID: 20877993
PDF is available here.
PDF is available here.
Abstract
We show that ecdysone signaling plays an important role in the early development and functioning of Malpighian tubules. Disruption of ecdysone receptor function, using targeted expression of dominant negative ecdysone receptor in stellate cells, results in disruption of organization of Malpighian tu...
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PMID: 20209436
PDF is available here.
PDF is available here.
Abstract
We describe the ultrastructure of two endosymbiotic species ("Candidatus Macropleicola appendiculatae" and "Candidatus Macropleicola muticae") that reside in cells of the Malpighian tubules of the reed beetle species Macroplea appendiculata and Macroplea mutica, respectively. Fluorescent in situ hyb...
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PMID: 19940933
PDF is available here.
PDF is available here.
Abstract
Journal of Experimental Biology (212)Pt 3 2009
Abstract
We examined the post-translational changes in cytosolic proteins when isolated Malpighian tubules of Aedes aegypti were stimulated for 1 min with the diuretic peptide aedeskinin-III (AK-III, 10(-7) mol l(-1)). The cytosols of control (C) and aedeskinin-treated (T) tubules were extracted from several...
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PMID: 19151207
PDF is available here.
PDF is available here.
Journal of Experimental Biology (212)Pt 3 2009
Abstract
We identified multipotent stem cells in the MTs of adult Drosophila and found that these stem cells are able to proliferate and differentiate in several types of cells in MTs. Furthermore, we demonstrated that an autocrine JAK-STAT (Janus kinase-signal transducers and activators of transcription) si...
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PMID: 19151216
PDF is available here.
PDF is available here.
Abstract
We show that the luciferase-like enzyme is located in the Malpighi tubules. cDNA cloning of this luciferase like enzyme, showed that it is a short AMP-ligase with weak luciferase activity which diverged long ago from beetle luciferases. The results indicate that the potential for bioluminescence in...
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PMID: 19247530
PDF is available here.
PDF is available here.
Abstract
The distribution of Nosema phyllotretae infection of Phyllotreta atra populations in Turkey is reported for the first time. In total, 48 of the 1668 beetles from 24 samples collected in five localities were infected by the parasite. Nosema infection was found in P. atra adults from only one of the f...
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PMID: 19598096
PDF is available here.
PDF is available here.
médecine/sciences (25)1 2009
Abstract
Abstract
Given the physiological importance of the Malpighian tubules to homeostasis in ants, this study aimed to characterize the enzymology, histology, histochemistry, and ultramorphology of the Malpighian tubules of Cephalotes atratus, C. clypeatus, and C. pusillus, as a contribution for the understanding...
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PMID: 18579390
PDF is available here.
PDF is available here.
Abstract
Melipona quadrifasciata and Melipona rufiventris are stingless bee species which present low and high heterochromatin content, respectively, on their mitotic chromosomes as assessed visually after a C-banding assay. However, these species do not show differences in the C-banding responses of their M...
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PMID: 18474437
PDF is available here.
PDF is available here.
Insect Molecular Biology (17)4 2008
Abstract
We show that VectorBase gene ID AAEL008292 encodes the DH44 receptor (GPRDIH1) most highly expressed in Malpighian tubules. Sequence analysis and transcript localization indicate that AaegGPRDIH1 is the co-orthologue of the Drosophila melanogaster DH44 receptor (CG12370-PA). Time-course quantitative...
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PMID: 18651923
PDF is available here.
PDF is available here.
Abstract
We have demonstrated that it has in vivo diuretic activity, but that it has no direct effect on Malpighian tubules. However, when the central nervous system plus corpora cardiaca and corpora allata are incubated along with the peptide and Malpighian tubules, the latter are stimulated by the AVPL pep...
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PMID: 18549960
PDF is available here.
PDF is available here.
Abstract
We identified PGE2 in midgut, fat body, Malpighian tubules, and ovarioles of Anopheles albimanus (Aa) mosquitoes. Our data indicate that PGE2 synthesis in cultured midguts responds to the presence of two bacterial species, Micrococcus luteus and Klebsiella pneumoniae. The production of mRNA coding f...
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PMID: 18412259
PDF is available here.
PDF is available here.
Abstract
We constructed two AgMNPV recombinants with the egfp gene under control of the hsp70 promoter, one being egt(-), and used another two recombinants (one egt(-)) containing the lacZ gene. Morphological alterations in the tubules were analyzed by light and electron microscopies. Bioassays were conducte...
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PMID: 18304572
PDF is available here.
PDF is available here.
Abstract
All multicellular organisms have a specialized organ to concentrate and excrete wastes from the body. The kidneys in vertebrates and the malpighian tubules in Drosophila accomplish these functions. Mammals and Drosophila share some similar features during renal tubular development. Vertebrate kidney...
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PMID: 18287558
PDF is available here.
PDF is available here.
Journal of Experimental Biology (211)Pt 6 2008
Abstract
We show here via substrate competition and drug inhibition studies that cAMP transport - but not cGMP transport - requires the presence of di- or tri-carboxylates; and that transport of both cyclic nucleotides occurs via ATP binding cassette sub-family G2 (ABCG2), but not via ABC sub-family C (ABCC)...
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PMID: 18310115
PDF is available here.
PDF is available here.
Abstract
We demonstrate the presence of DH31-like immunoreactivity in the central nervous system (CNS) and gut of O. fasciatus 5th instars. As well, DH31-like material was quantified and partially purified from the CNS of 5th instar O. fasciatus using reversed-phase liquid chromatography (RPLC) and monitored...
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PMID: 18206263
PDF is available here.
PDF is available here.
Journal of Experimental Biology (211)Pt 3 2008
Abstract
We have demonstrated the presence of DH(31)-like peptides in the central nervous system (CNS) and gut of R. prolixus 5th instars. In the present work, a DH(31) from the CNS of 5th instar R. prolixus was isolated using reversed-phase liquid chromatography (RPLC), monitored with an enzyme-linked immun...
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PMID: 18203994
PDF is available here.
PDF is available here.
Journal of Experimental Biology (211)Pt 3 2008
Abstract
We present electrical, physiological and molecular evidence for substantial electrical coupling of epithelial cells in Malpighian tubules via gap junctions. Current was injected into one principal cell of the isolated Malpighian tubule and membrane voltage deflections were measured in that cell and...
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PMID: 18203997
PDF is available here.
PDF is available here.
Acta Biochimica Polonica (55)2 2008
Abstract
We report the cloning and characteristics of an adiponectin-like receptor gene from Bombyx mori (BmAdipoR) with highly conserved deduced amino-acid sequences and similar structure to the human adiponectin receptor (AdipoR). Structural analysis of the translated cDNA suggested it encoded a membrane p...
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PMID: 18560604
PDF is available here.
PDF is available here.
Abstract
We report on the transcriptional patterns of a putative white (w) gene encoding an ABC-active-transporter protein during development in Hessian fly, Mayetiola destructor. The deduced amino acid sequence for the Hessian fly white showed 74-77% similarities to white/ATP-binding-cassette proteins and 5...
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PMID: 17980386
PDF is available here.
PDF is available here.
Journal of Experimental Biology (211)Pt 1 2008
Abstract
We propose that: (1) 5HT and a native CRF-related peptide similar to ZooneDH activate the same second messenger systems and ion transporters in the upper tubule cells; (2) CRF-related peptide is utilized to maintain high rates of fluid secretion during the post-feeding diuresis and is additionally u...
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PMID: 18083731
PDF is available here.
PDF is available here.
Journal of Experimental Biology (210)Pt 24 2007
Abstract
The responses of larval Aedes aegypti to media of pH 4, 7 and 11 provide evidence for pH regulatory strategies. Drinking rates in pH 4 media were elevated 3- to 5-fold above those observed in pH 7 or 11. Total body water was elevated during acute exposure to acidic media. During chronic exposure, to...
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PMID: 18055625
PDF is available here.
PDF is available here.
Journal of Experimental Biology (210)Pt 22 2007
Abstract
We hypothesize the presence of a CA within the lumen itself to generate bicarbonate from CO(2) produced by the metabolically active alimentary canal cells. Here, we report the cloning and characterization of a novel cytoplasmic-type alpha-CA from the larval An. gambiae alimentary canal. Antibody imm...
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PMID: 17981859
PDF is available here.
PDF is available here.
Journal of Experimental Biology (210)Pt 22 2007
Abstract
Acheta domesticus is reported to have an antidiuretic hormone that reduces Malpighian tubule secretion. Identified peptides known to work in this way (Tenmo-ADFa and ADFb, and Manse-CAP(2b)) were tested as candidates for the unidentified hormone, along with their second messenger, cyclic GMP. Only T...
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PMID: 17981866
PDF is available here.
PDF is available here.
Abstract
We show here a sensitivity of circadian clock function to oxidative stress that is revealed in flies lacking the foxo gene product. When exposed to oxidative stress, wild-type flies showed attenuated clock gene cycling in peripheral tissues, whereas foxo mutants also lost behavioral rhythms driven b...
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PMID: 17895391
PDF is available here.
PDF is available here.
Journal of Insect Physiology (53)10 2007
Abstract
Our results show that salicylate is transported into the lumen of the Malpighian tubules in all the species evaluated, except Rhodnius prolixus. The transepithelial transport of salicylate by the Malpighian tubules of Drosophila simulans, Drosophila erecta, Drosophila sechellia, and Acheta domesticu...
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PMID: 17640663
PDF is available here.
PDF is available here.
Abstract
We demonstrated that DRIP-like immunoreactivity was found in both the distal and mid-Mt. The distribution of the aquaporin altered in response to stimulation and was consistent with the secretory data. The regulation of secretion in Acheta Mt is quite different from that of Drosophila, with both cat...
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PMID: 17267256
PDF is available here.
PDF is available here.
Genome Research (17)8 2007
Abstract
We measured genome-wide expression profiles of aging in Drosophila melanogaster for seven tissues representing nervous, muscular, digestive, renal, reproductive, and storage systems at six adult ages. In each tissue, we identified hundreds of age-related genes exhibiting significant changes of trans...
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PMID: 17623811
PDF is available here.
PDF is available here.
Journal of Experimental Biology (210)Pt 14 2007
Abstract
The effects of chronic exposure to dietary salicylate on elimination and renal excretion of salicylate by D. melanogaster larvae were evaluated using salicylate-selective microelectrodes. Larvae chronically exposed to dietary salicylate showed 25% less salicylate in the haemolymph compared to the co...
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PMID: 17601950
PDF is available here.
PDF is available here.
Abstract
We cloned a cDNA encoding a 571-residue protein (AnaNRAMP) with the structural features defining the NRAMP family. AnaNRAMP mRNA induced (59)Fe(2+) incorporation when injected into Xenopus oocytes. Western blot analysis revealed that AnaNRAMP is expressed in the head, midgut and at high levels in Ma...
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PMID: 17517330
PDF is available here.
PDF is available here.
Journal of Experimental Biology (210)Pt 11 2007
Abstract
We demonstrated that MTs of Triatoma infestans produce an autonomous endocrine secretion of an allatotropin-like (AT-like) peptide. In the present study, we report a myostimulatory activity of AT at the level of the hindgut (HG), associated with endocrine mechanisms regulating post-prandial diuresis...
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PMID: 17515423
PDF is available here.
PDF is available here.
Abstract
We have identified the putative exchanger and designated it AeNHE8. Immunolocalization studies demonstrated that AeNHE8 is expressed in the apical membranes of Malpighian tubules, gastric caecae, and rectum. When heterologously expressed in salt-sensitive yeast cells lacking Na(+) extrusion and Na(+...
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PMID: 17287198
PDF is available here.
PDF is available here.
Journal of General Virology (88)Pt 4 2007
Abstract
ScathL is a cathepsin L-like cysteine protease from the flesh fly, Sarcophaga peregrina, that digests components of the basement membrane (BM) during insect metamorphosis. A recombinant baculovirus that expresses ScathL (AcMLF9.ScathL) kills larvae of the tobacco budworm, Heliothis virescens, signif...
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PMID: 17374754
PDF is available here.
PDF is available here.
Abstract
This paper reports the effects of different diuretic factors on the Malpighian tubules of beetles. Calcitonin (CT)-like peptides from silkmoth and mosquito increase fluid secretion in a dose-dependent manner in the tubules of Tenebrio molitor, but the cockroach CT-like peptide, Dippu-DH(31), has no...
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PMID: 17292388
PDF is available here.
PDF is available here.
Abstract
Rhodnius prolixus Malpighian tubules (MTs) are a good model for fluid and ion secretion studies in view of the dramatic postprandial diuresis, which follows its massive blood meals. Ingestion of a blood meal equals to 10-12 times their initial body mass, leads to rapid activation of high output by e...
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PMID: 17401478
PDF is available here.
PDF is available here.
Abstract
We characterize the spatial expression of Cyp6g1 in insecticide-resistant and -susceptible strains. We show that the Accord LTR insertion is indeed the resistance-associated mutation and demonstrate that the Accord LTR carries regulatory sequences that increase the expression of Cyp6g1 in tissues im...
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PMID: 17179088
PDF is available here.
PDF is available here.
Biopolymers (88)1 2007
Abstract
Insect neuropeptides of the insect kinin class share a common C-terminal pentapeptide sequence F(1)X(1)(2)X(2)(3)W(4)G(5)-NH(2) (X(2)(3) = P, S, A) and regulate such critical physiological processes as water balance and digestive enzyme release. Analogs of the insect kinin class, in which the critic...
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PMID: 17117460
PDF is available here.
PDF is available here.
Abstract
Molecular endocrinology has revolutionised our understanding of neuroendocrine signalling. However, reductionist technologies emphasise the molecule at the expense of the organism. Can modern, post-genomic technologies also help us understand neuroendocrine signalling in the whole organism? The judi...
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PMID: 17324417
PDF is available here.
PDF is available here.
Abstract
A series of truncated and Ala-replacement analogs of the peptide Manse-CAP2b (pELYAFPRV-NH(2)) were assayed for diuretic activity on Malpighian tubules of the housefly Musca domestica (M. domestica). The C-terminal hexapeptide proved to be the active core, the minimum sequence required to retain sig...
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PMID: 17161506
PDF is available here.
PDF is available here.
Abstract
We investigated the possibility that the immunoglobulin-domain protein Hibris and the GATA factor Serpent were co-expressed in motile mesodermal cells by using the hibris expression reporter P[w(+)]36.1 and antibody staining. We show that P[w(+)]36.1 reproduces the endogenous expression of hibris in...
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PMID: 17362344
PDF is available here.
PDF is available here.
Journal of Experimental Biology (209)Pt 23 2006
Abstract
We discuss our findings in light of previous physiological and morphological studies and re-examine our current models of ion transport in these two developmental stages of mosquitoes that cope with disparate osmoregulatory challenges....
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PMID: 17114398
PDF is available here.
PDF is available here.
Abstract
The effects of stimulants of fluid secretion on net transepithelial transport of the MRP2 substrate Texas Red and the p-glycoprotein substrate daunorubicin were examined in Malpighian tubules of Drosophila melanogaster. Fluid secretion rates were determined using the Ramsay assay and secreted fluid...
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PMID: 17048246
PDF is available here.
PDF is available here.
Abstract
We show empirically that this assumption is correct. Invertebrate innate immunity relies heavily on effector systems which, on activation, produce cytotoxins that kill pathogens. Reliance on these robust, fast-acting, generic killing mechanisms ensures a potent and rapid response to pathogen invasio...
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PMID: 16959651
PDF is available here.
PDF is available here.
Abstract
In this study the mid- and hindgut of Manduca sexta larvae were tested for their ammonia transport properties using a custom-made Ussing chamber. In the presence of 0.1 mmoll(-1) ammonia on both sides of the isolated epithelium, active transepithelial ammonia absorption (aTEPA) was observed in all m...
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PMID: 17027847
PDF is available here.
PDF is available here.
Journal of Experimental Biology (209)Pt 18 2006
Abstract
We present the identification of sodium/proton exchanger isoform 3 (NHE3) from yellow fever mosquito, Aedes aegypti (AeNHE3). AeNHE3 localizes to the basal plasma membrane of Malpighian tubule, midgut and the ion-transporting sector of gastric caeca. Midgut expression of NHE3 shows a different patte...
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PMID: 16943493
PDF is available here.
PDF is available here.
Journal of Experimental Biology (209)Pt 17 2006
Abstract
We carried out an initial analysis of 21 known or putative SLC6 family members from the Drosophila genome. Protein sequences from these genes segregated into either well-defined subfamilies, including the novel insect amino acid transporter subfamily, or into a group of weakly related sequences not...
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PMID: 16916974
PDF is available here.
PDF is available here.
Abstract
Our results suggest that salicylate uptake across the basolateral membrane of D. melanogaster Malpighian tubules is mediated by a non-electrogenic, alpha-cyano-4-hydroxycinnamic acid-sensitive, Na(+):salicylate cotransport system....
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PMID: 16934829
PDF is available here.
PDF is available here.
Biochemical Society Transactions (34)Pt 4 2006
Abstract
We describe some of this work and outline recent progress in understanding the organotypic function of novel phosphodiesterases encoded by the D. melanogaster genome....
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PMID: 16856847
PDF is available here.
PDF is available here.
Abstract
Rhodnius prolixus is an obligatory blood-feeder that can ingest blood meals of up to 10 times its mass. Rapid production of urine commences within 2-3 min of the start of feeding in order to eliminate the load of water and salts, and so there is an increase of Malpighian tubule secretion greater tha...
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PMID: 16377224
PDF is available here.
PDF is available here.
Physiological Genomics (26)1 2006
Abstract
Secretory pathway Ca2+/Mn2+-ATPases (SPCAs) are important for maintenance of cellular Ca2+ and Mn2+ homeostasis, and, to date, all SPCAs have been found to localize to the Golgi apparatus. The single Drosophila SPCA gene (SPoCk) was identified by an in silico screen for novel Ca2+-ATPases. It encode...
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PMID: 16609144
PDF is available here.
PDF is available here.
Development (133)12 2006
Abstract
I discuss selected examples of elongation in embryogenesis to identify common and unique mechanisms, useful questions for further work, and new systems that offer opportunities for answering these questions. Fiber-wound, hydraulic mechanisms of elongation highlight the importance of biomechanical li...
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PMID: 16720874
PDF is available here.
PDF is available here.
Journal of Experimental Biology (209)Pt 10 2006
Abstract
Measurements of intracellular and luminal ion activities as well as membrane potential were used to calculate electrochemical gradients for Cl-, Na+, K+ and H+ across the apical membrane during fluid secretion by Malpighian tubules of Rhodnius prolixus. The results show that the contribution of Na+/...
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PMID: 16651561
PDF is available here.
PDF is available here.
Journal of Experimental Biology (209)Pt 10 2006
Abstract
We describe the generation of a Malvolio-reactive polyclonal antibody and apply it to evaluate Malvolio localisation during stages of D. melanogaster development, and compare the results with the localisation of the enhancer trap line identified with beta-galactosidase. All immunolocalisation studie...
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PMID: 16651563
PDF is available here.
PDF is available here.
Abstract
We examined transepithelial transport of the prototypical type I organic cation (OC) tetraethylammonium (TEA) and the plant alkaloid nicotine by the isolated Malpighian tubules (MTs) of nine insect species from six orders. Isolated tubules were exposed to radiolabelled forms of either TEA or nicotin...
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PMID: 16527303
PDF is available here.
PDF is available here.