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	Malpighian tubule system - Wikipedia, the free encyclopedia
		It is unclear as to whether the Malpighian tubules of arachnids and those of the Uniramia are homologous or the result of convergent evolution.
		Malpighian tubules are slender tubes normally found in the posterior regions of arthropod alimentary canals.
		Hemipteran insects use tubules that permit movement of solutes into the distal portion of the tubules while reabsobtion of water and essential ions directly to the hemolymph occurs in the proximal portion and the rectum.
	en.wikipedia.org /wiki/Malpighian_tubule (589 words)

	Drosophila tissue and organ development: Malpighian tubules
		Therefore Krüppel is responsible for cell fate in the Malpighian tubules, a function quite distinct from Krüppel's role as a gap gene.
		The two anterior Malpighian tubules are classically described as comprising a distal initial segment and a proximal main segment, joined by a narrow transitional segment; the two posterior tubules, in contrast, were thought to consist solely of a main segment.
		None of the enhancer trap markers mark cells in the lower tubule or ureter, suggesting that the mechanism by which type II cells are specified respects the newly defined lower tubule boundary.
	www.sdbonline.org /fly/aimorph/maltubls.htm (2994 words)

	Biology - Bee Behavior
		Since this protozoan is found in the Malpighian tubules of adult bees, diagnosis can be made only by the removal and microscopic examination of the tubules for the presence of amoeba cysts.
		The Malpighian tubules are long, threadlike projections originating at the junction of the midgut and the hindgut.
		The tubules can be teased away from the digestive tract with a pair of fine tweezers and then placed in a drop of water on a microscope slide.
	maarec.cas.psu.edu /bkCD/Bee_Diseases/protozoan.html (544 words)

	Memórias on line
		The Malphigian tubule cells were dissected in lactoacetic acid (85% lactic acid-100% acetic acid, 0.55: 0.45) or lactic acid 80%; all cytoplasmatic components were removed and the chromosomes were left for a minimum of 20 to 48 h at 3
		The polytene chromosomes obtained in the pupal Malpighian tubules showed fragile structures (Figure), however the availability of suitable slides was 4% (58 out of the approximately 1,383 slides).
		The pupal Malpighian tubule polytene chromosomes showed conspicuous structural characteristics suitable for their use in the location of resistance and vector competence genes.
	memorias.ioc.fiocruz.br /983/4704.html (1442 words)

	CHAPTER SEVEN
		With respect to insects, the most general physiological expression is that ions and water are secreted by Malpighian tubules and they are selectively resorbed in hindguts.
		We treated Malpighian tubules with eicosanoid biosynthesis inhibitors, then observing the effects of the inhibition on fluid secretion rates in adult females of the mosquito Aedes aegypti.
		Increased Malpighian tubule and rectal fluid secretion rates is thought to serve a function that goes beyond homeostasis of salt and water balance in insects.
	entomology.unl.edu /ent801/mtubules.html (1961 words)

	DHEA, antibiotics, Weight Loss drugs, weight loss herbs, weight loss herbal formula, hair loss, hair growth, buy Rx ... (Site not responding. Last check: 2007-10-30)
		Contributions of K+:Cl- cotransport and Na+/K+-ATPase to basolateral ion transport in malpighian tubules of Drosophila melanogaster.
		Mechanisms of Na+ and K+ transport across the basolateral membrane of isolated Malpighian tubules of Drosophila melanogaster were studied by examining the effects of ion substitution and putative inhibitors of specific ion transporters on fluid secretion rates, basolateral membrane potential and secreted fluid cation composition.
		In cyclic-AMP-stimulated tubules, K+ entry is stimulated by the increase in the apical membrane potential, which drives K+:Cl- cotransport at a faster rate, and by the stimulation of the Na+/K+-ATPase.
	www.twinpharm.com /ref-cyclic-AMP/cyclic-AMP-research-abs4.47.html (1122 words)

	Identification of Genes Controlling Malpighian Tubule and Other Epithelial Morphogenesis in Drosophila melanogaster -- ...
		In wild type, the Malpighian tubule precursor cells, as detected by Cut staining, are initially a ring of cells located at the junction between midgut and hindgut at stage 10.
		Tubule elongation is defective in barr, revealed by shorter and wider tubules with more cells in their circumference (H) than seen in wild type (D).
		Genes required for different steps in tubule development are indicated on the basis of the Malpighian tubule phenotype observed in different mutants, as described here and in references in the text.
	www.genetics.org /cgi/content/full/151/2/685 (5617 words)

	Anais da Academia Brasileira de Ciências - Sodium pumps in the Malpighian tubule of Rhodnius sp. (Site not responding. Last check: 2007-10-30)
		The first step in the insect's urine formation is the secretion of an isosmotic fluid in the distal segment of the Malpighian tubule followed by a selective reabsorption in the proximal segment of the Malpighian tubule, hindgut and rectum.
		-subunit cDNA in the basolateral membrane of Malpighian tubule of Drosophila melanogaster.
		)ATPase of the Malpighian tubule of Rhodnius sp.
	www.scielo.br /scielo.php?script=sci_arttext&pid=S0001-37652000000300014&lng=en&nrm=iso&tlng=en (1601 words)

	Na+/H+ exchange in mosquito Malpighian tubules -- Petzel 279 (6): 1996 -- AJP - Regulatory, Integrative and Comparative ...
		Malpighian tubules were loaded for 30 min with 5 µM BCECF-AM dissolved in saline.
		The Na exchanger in mosquito Malpighian tubules was activated by using the NH Cl pulse technique (3).
		Malpighian tubules with low-Na saline and 100 µM EIPA alone and in concert with similar basolateral
	ajpregu.physiology.org /cgi/content/full/279/6/R1996 (4477 words)

	Dose-dependent effects of CRF-like diuretic peptide on transcellular and paracellular transport pathways -- Clark et ...
		and the paracellular transport pathway in Malpighian tubules (3).
		Leucokinin increases paracellular permeability in insect Malpighian tubules.
		Differential effects of secretagogues on the electrophysiology of the Malpighian tubules of the yellow fever mosquito.
	ajprenal.physiology.org /cgi/content/full/274/5/F834 (3452 words)

	JIS: Tschinkel 2.12.2002
		The average FLU intensity calculated for three tissue types (the larval body, gills, and Malpighian tubules) in the 50 mg/l treatment, as compared to tap water controls, was doubled in larvae in tubes, whereas it was elevated 36-fold in naked larvae (Fig.
		The relative fluorescence in gills, Malpighian tubules, and body lumen rose about 25 times in larvae without tubes as compared to controls, whereas the fluorescence intensity in gills and body lumen of larvae within silt tubes was only about 1.5 times higher than in the control.
		The toxicant is transported from the Malpighian tubules into the hindgut, which was second to the midgut in FLU intensity.
	www.insectscience.org /2.8 (2732 words)

	Leucokinin activates Ca2+-dependent signal pathway in principal cells of Aedes aegypti Malpighian tubules -- Yu and ...
		Tubules were perfused in vitro with normal Ca -containing Ringer solution in the tubule lumen and the peritubular bath (control; 5-10 min).
		Malpighian tubules of the house cricket (15) and the fruit fly
		Oscillations of voltage and resistance in Malpighian tubules of Aedes aegypti.
	ajprenal.physiology.org /cgi/content/full/283/3/F499 (5612 words)

	Analysis of epithelial K+ transport in Malpighian tubules of Drosophila melanogaster: evidence for spatial and temporal ... (Site not responding. Last check: 2007-10-30)
		The individual segments of the Malpighian tubule and their relationship to the ureter are shown.
		tubule 2 and the smallest in Malpighian tubule 3.
		Ramsey, J. The excretion of sodium and potassium by the Malpighian tubules of Rhodnius.
	intl-jeb.biologists.org /cgi/content/full/204/13/2289 (5133 words)

	Energizing Epithelial Transport with the Vacuolar H+-ATPase -- Beyenbach 16 (4): 145 -- Physiology
		A: cross-section of Malpighian tubule of the saline-water mosquito Aedes taeniorhynchus, illustrating principal cells (P) with a prominent mitochondria-rich brush border and a stellate cell (S) with a short, thin brush border.
		B: brush border of a principal cell in the Malpighian tubule of the yellow fever mosquito Aedes aegypti.
		A: inhibition of oxidative metabolism with dinitrophenol (DNP) collapses membrane and transepithelial voltages in the isolated perfused Malpighian tubule.
	physiologyonline.physiology.org /cgi/content/full/16/4/145 (3611 words)

	A Single cDNA Encodes All Three Aedes Leucokinins, Which Stimulate Both Fluid Secretion by the Malpighian Tubules and ...
		tubules in mosquitoes, crickets, locusts, and moths (21-24).
		The transepithelial voltage in the malpighian tubules was measured using the method of Burg et al.
		the chloride conductance of the malpighian tubule (50, 52).
	www.jbc.org /cgi/content/full/272/16/10402 (4112 words)

	mystudy
		Malpighian tubules were implanted in three different circumstances.
		Using a microscope, digital camera and computer the average greyscale value of the malpighian tubule implants was taken before insertion and after 24 hours.
		This suggests that there is a certain level of regulation of the insect immune response and this was why change in malpighian tubules attached to nylon was greater.
	www.shef.ac.uk /aps/mbiolsci/ben/mystudy.html (735 words)

	The V-type H+-ATPase in Malpighian tubules of Aedes aegypti: localization and activity -- Weng et al. 206 (13): 2211 -- ...
		Lanes 1, 3 and 5 are the Manduca holoenzyme, and lanes 2, 4 and 6 are the crude extracts of Aedes Malpighian tubules.
		ATPase in electrogenesis and epithelial transport in Malpighian tubules.
		Williams, J. and Beyenbach, K. Differential effects of secretagogues on the electrophysiology of the Malpighian tubules of the yellow-fever mosquito Aedes aegypti.
	jeb.biologists.org /cgi/content/full/206/13/2211 (4588 words)

	Untitled Document
		The Malpighian tubule secreta are used to strengthen the walls of burrows and possibly also to clean the integument.
		The Malpighian tubule secreta are used as surfactants stabilizing the foam or as a structural component of the dwelling tubes.
		The Malpighian tubules are active as glands in both the immatures and adults.
	www.inhs.uiuc.edu /~rakitov/evolution.html (384 words)

	Homepage Klaus W. Beyenbach
		Justin Wimpole: Intracellular K activities in principal cells of Malpighian tubules of the yellow fever mosquito.
		Identification of Mg-transporting renal tubules and cells in the kidney by ion microscopy imaging of stable isotopes.
		Voltage polarization of the basolateral membrane of principal cells in Malpighian tubules of the yellow fever mosquito Aedes aegypti: Role of the vacuolar H-ATPase at the apical membrane.
	www.people.cornell.edu /pages/kwb1 (2160 words)

	Na+ competes with K+ in bumetanide-sensitive transport by Malpighian tubules of Rhodnius prolixus -- Ianowski et al. ...
		Tubules were exposed to the vehicle alone (filled symbols; 0.1% ethanol) or to the vehicle plus hydrochlorothiazide (open symbols).
		Ramsay, J. Active transport of water by the Malpighian tubules of the stick insect, Dixippus morosus (Orthoptera; Phasmidae).
		Xu, W. and Marshall, A. X-ray microanalysis of the Malpighian tubules of the fl field cricket Teleogryllus oceanicus: the roles of Na K ATPase and the Na K 2Cl cotransporter.
	jeb.biologists.org /cgi/content/full/207/21/3707 (3987 words)

	Olympus MIC-D: Darkfield Gallery - Grasshopper Malpighian Tubules (Site not responding. Last check: 2007-10-30)
		Furthermore, by eliminating the need for as much water as would be necessary to excrete ammonia in solution, flying and jumping insects such as grasshoppers are not as heavy, reducing the load on their muscles and limbs.
		The uric acid is absorbed by the Malpighian tubules and the low pH in the tubule lumen causes uric acid to precipitate out as dry matter.
		The grasshopper's tubules, as with other insect Malpighian tubules, discharge into the posterior region of the gut tube (the hindgut) and function in a similar fashion to the kidneys of higher terrestrial animals.
	olympusmicro.com /micd/galleries/darkfield/grasshoppermalpighian1.html (369 words)

	Douglas S. G. Neufeld (Site not responding. Last check: 2007-10-30)
		The New Zealand alpine weta lives on mountain summits of the South Island of New Zealand and is known to naturally survive bouts of freezing, an adaptation which probably evolved during past ice ages.
		We investigated the ability of Malpighian tubules of the weta to survive in vitro freezing under a variety of conditions (e.g.
		Malpighian tubules were found to survive freezing in vitro and provide an excellent model for elucidating mechanisms of freeze tolerance in an epithelial tissue.
	www.emu.edu /faculty/neufeldd/otago.html (199 words)

	Insects in Motion: Cockroach Dissection
		Contents from the midgut and Malpighian tubules empty into the hindgut, where final resorption of water, salts, and nutrients from the feces and urine takes place before excretion.
		The Malpighian tubules are actually the primary organs of the excretory system.
		Their function is to remove nitrogen-containing wastes and regulate water and salts in an insect's blood, called hemolymph.
	www.ento.vt.edu /~carroll/insect_video_dissection.html (382 words)

	Drosophila tissue and organ development: Gut ectoderm - Foregut and hindgut
		The whole of the hindgut is ectodermal in origin, including Malpighian tubules that form close to the junction between hindgut and posterior midgut.
		Malpighian tubules are an exception to this remodeling process.
		Foregut is determined by the same genes that act in the gnathal (mouth) segments of head.
	www.sdbonline.org /fly/aimorph/gut-ecto.htm (367 words)

	Identification of a potent antidiuretic factor acting on beetle Malpighian tubules -- Eigenheer et al. 99 (1): 84 -- ...
		i.e., inhibition of diuresis by the Malpighian tubules
		Basal secretion was determined on Malpighian tubules initially in control solution (Ringer's saline); subsequently this was replaced with more Ringer's solution or Ringer's solution containing antidiuretic factor.
		Results are shown as pmol per tubule of cAMP ± SEM; columns indicated as zero had an amount of cAMP lower than the limit of detection (0.6 pmol per incubation) of the EIA.
	www.pnas.org /cgi/content/full/99/1/84 (4428 words)

	Reference.com/Encyclopedia/Excretion (Site not responding. Last check: 2007-10-30)
		In urination, Hormone control over excretion occurs in the distal tubules of the kidneys as directed by the hypothalamus.
		In insects, a system involving Malpighian tubules is utilized to excrete metabolic waste.
		Metabolic waste diffuses or is actively transported into the tubule, which transports the wastes to the intestines.
	www.reference.com /browse/wiki/Excretion (322 words)

	Antibacterial properties of lansoprazole alone and in combination with antimicrobial agents against Helicobacter ...
		Characteristics of the luminal proton pump in malpighian tubules of the ant.
		These results indicate that lansoprazole at a dosage of 30 mg once daily in the morning produced the most potent inhibition of acid secretion in young Japanese volunteers, compared with famotidine 20 mg twice daily and omeprazole 20 mg once in the morning.
		The active pump mechanisms involved in K+ secretion of the malpighian tubules of the ant and present in the luminal membrane were investigated on isolated, luminally perfused tubules of Formica.
	www.hairmillion.com /rx-online-info/prilosec-online-rx/prilosec-online-rx.155.html (592 words)

	Vectorial Competence of Aedes aegypti (Linnaeus 1762) Rio de Janeiro Strain, to Dirofilaria immitis (Leidy 1856)
		Larvae then migrate into the Malpighian tubules where they reside in the cytoplasm of the primary cells.
		It is known that when the filariae burden in the Malpighian tubules increases, the result is excessive mortality that may approach 100% (Kershaw et al.
		In order to survive long enough to allow the complete development of the helminth and therefore transmit the parasite among definitive hosts, the number of developing filariae in the mosquito must be reduced (Kershaw et al.
	memorias.ioc.fiocruz.br /965/4148.html (732 words)

	Interactive Fly, Drosophila
		Kruppel is expressed and required in the anlage of the Malpighian tubules at the posterior terminus of the embryo.
		D-Ptx1 transcripts and protein accumulate in the posterior portion of the midgut, in the developing Malpighian tubules, in a subset of ventral somatic muscles, and in neural cells.
		The attachment point of the Malpighian tubules marks the anterior boundary of the rectum.
	www.sdbonline.org /fly/gene/forkhed7.htm (5122 words)

	BioMedical Science Department (Site not responding. Last check: 2007-10-30)
		In our secretory epithelium, the mosquito Malpighian tubule, we have isolated several peptide hormones from the head of the mosquito which have profound effects on sodium chloride and water transport in vivo and in vitro.
		In our reabsorptive epithelium, an amphibian distal tubule cell line, the agonist for an increase in sodium transport is the steroid hormone, aldosterone.
		Arachidonic acid and prostaglandins in malpighian tubules of the yellow fever mosquito.
	medicine.creighton.edu /pharmacology/faculty/petzel.htm (382 words)

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