DYNAMICS OF CALCIUM, CATECHOLAMINES AND CYCLIC AMP IN CONTROL OF SALIVARY FLUID SECRETION BY FEMALE IXODID TICKS

1979 ◽  
pp. 413-419
Author(s):  
Glen R. Needham ◽  
John R. Sauer
Keyword(s):  
Cyclic Amp ◽  
Fluid Secretion ◽  
Ixodid Ticks

The effect of avermectins on feeding, salivary fluid secretion, and fecundity in some ixodid ticks

1986 ◽  
Vol 2 (1) ◽  
pp. 1-18 ◽  
Author(s):  
W. Reuben Kaufman ◽  
Sandra G. Ungarian ◽  
Alexandra E. Noga
Keyword(s):  
Fluid Secretion ◽  
Ixodid Ticks

THE EFFECTS OF MANDUCA SEXTA DIURETIC HORMONE ON FLUID TRANSPORT BY THE MALPIGHIAN TUBULES AND CRYPTONEPHRIC COMPLEX OF MANDUCA SEXTA

1993 ◽  
Vol 178 (1) ◽  
pp. 231-243 ◽  
Author(s):  
N. Audsley ◽  
G. M. Coast ◽  
D. A. Schooley
Keyword(s):  
Cyclic Amp ◽  
Manduca Sexta ◽  
Fluid Transport ◽  
Basal Membrane ◽  
Fluid Secretion ◽  
Hormonal Control ◽  
Malpighian Tubules ◽  
Proximal Tubules ◽  
Fluid Absorption ◽  
Diuretic Hormone

1. Manduca sexta diuretic hormone (Mas-DH) stimulates fluid secretion by adult Malpighian tubules of M. sexta, demonstrating its site of diuretic action in M. sexta for the first time. It was not possible to develop a suitable bioassay to measure fluid secretion in larval proximal tubules. 2. Mas-DH has an antidiuretic action on the cryptonephric complex of larval M. sexta because it increases fluid absorption from the rectum. It appears that in this complex Mas-DH is acting on a Na+/K+/2Cl- co-transporter, presumably on the basal membrane of the cryptonephric Malpighian tubules, because Mas-DH-stimulated fluid absorption by the cryptonephric complex is inhibited by bumetanide or the removal of Cl-, Na+ or K+ from the haemolymph side of the tissue. This is the first demonstration of hormonal control of fluid absorption by the cryptonephric complex. 3. Concomitant with the stimulation of fluid transport, Mas-DH increases the amount of cyclic AMP secreted by adult Malpighian tubules and the cryptonephric complex. In addition, Mas-DH promotes cyclic AMP production by the larval proximal tubules.

The Effects Of Derivatives Of Adenosine 3',5'-Monophosphate On Fluid Secretion By The Salivary Glands Of Calliphora

1973 ◽  
Vol 59 (3) ◽  
pp. 595-606
Author(s):  
M. J. BERRIDGE
Keyword(s):  
Cyclic Amp ◽  
Salivary Glands ◽  
Cyclic Nucleotides ◽  
Fluid Secretion ◽  
Receptor Interaction ◽  
Base Region ◽  
Adenine Ring ◽  
Derivatives Of ◽  
Ribose Sugar

1. The nature of the cyclic AMP-receptor interaction was analysed by testing a range of cyclic nucleotides on the isolated salivary glands of adult blowflies. 2. All compounds containing modifications in the region of ribose or the phosphate ring were inactive. One compound, adenosine 3',5'-phosphorothioate, appeared to compete with cyclic AMP. 3. A number of nucleotides with alterations restricted to the base region of the molecule could stimulate secretion equally as well as cyclic AMP. 4. These observations indicate that during the action of cyclic AMP the phosphate ring and ribose sugar are critical whereas the adenine ring plays a relatively unspecific role.

CYCLIC NUCLEOTIDES, CALCIUM AND SALIVARY FLUID SECRETION IN IXODID TICKS

1979 ◽  
pp. 365-373 ◽  
Author(s):  
J.R. Sauer ◽  
G.R. Needham ◽  
H.L. McMullen ◽  
R.D. Morrison
Keyword(s):  
Cyclic Nucleotides ◽  
Fluid Secretion ◽  
Ixodid Ticks

scholarly journals Cholera toxin effects on fluid secretion, adenylate cyclase, and cyclic AMP in porcine small intestine.

1978 ◽  
Vol 21 (2) ◽  
pp. 373-380 ◽  
Author(s):  
G W Forsyth ◽  
D L Hamilton ◽  
K E Goertz ◽  
M R Johnson
Keyword(s):  
Small Intestine ◽  
Cyclic Amp ◽  
Adenylate Cyclase ◽  
Cholera Toxin ◽  
Fluid Secretion

Insect-Like Characteristics of the Malpighian Tubules of a Non-Insect: Fluid Secretion in the Centipede Uthobius Forficatus (Myriapoda: Chilopoda)

1991 ◽  
Vol 158 (1) ◽  
pp. 165-180
Author(s):  
ANGELA WENNING ◽  
U. T. E. GREISINGER ◽  
JACQUES P. PROUX
Keyword(s):  
Cyclic Amp ◽  
Flow Rate ◽  
Fluid Secretion ◽  
Urine Flow ◽  
Malpighian Tubules ◽  
Urine Flow Rate ◽  
Dibutyryl Cyclic Amp ◽  
Diuretic Hormone ◽  
Urine Formation ◽  
Lithobius Forficatus

Fluid secretion by isolated upper and lower portions of Malpighian tubules in the centipede Lithobius forficatus L. was studied. Ion requirements, cellular and transepithelial potentials, dependence on external osmolality and the effects of an insect diuretic factor and transport-active drugs were investigated. Unlike many insects, L. forficatus exhibited strongly Na+-dependent, K+-independent urine formation. However, as in many insects, upper and lower tubule portions from L. forficatus produced a K+-enriched, hypertonic fluid, and the transepithelial potential was positive with respect to the haemolymph. Furthermore, furosemide (5×10−4moll−1) reversibly inhibited urine formation. Ouabain, even at 10−3moll−1, had little effect on urine flow rate in upper tubules but inhibited secretion in lower tubules, albeit not completely. Locust diuretic hormone (at 10−7moll−1) enhanced fluid secretion in L. forficatus, but its action was not mimicked by dibutyryl cyclic AMP. The results suggest that some characteristics attributed exclusively to insects are common to non-insect arthropods.

The influence of various factors on fluid secretion by in vitro salivary glands of ixodid Ticks

1976 ◽  
Vol 64 (3) ◽  
pp. 727-742
Author(s):  
W. Kaufman
Keyword(s):  
Salivary Gland ◽  
Salivary Glands ◽  
Culture Medium ◽  
Dry Weight ◽  
Fluid Secretion ◽  
Ixodid Tick ◽  
Ixodid Ticks ◽  
Mammalian Tissue ◽  
Stimulating Factor

1. Salivary glands of the female ixodid tick, Dermacentor andersoni, secrete fluid in vitro when bathed in a slightly modified version of the mammalian tissue culture medium ‘TC 199′. 2. Rate of salivation in vitro increases with progression of feeding, but there is no comparable increase in dry weight of the salivary glands during the early phase of engorgement. Engorged ticks secreted at only 25% the rate of 90–250 mg ticks, indicating that salivary gland degeneration has already begun in the very early post-engorgement stage. 3. A salivary gland stimulating factor can be detected in the nervous system but not in other tissues. 4. Male salivary glands secrete at only 1/20th the rate of female glands. Thus males probably do not use their salivary glands as osmoregulatory organs. 5. From the uniform lack of response to ACh and uniform response to DA in 7 ixodid tick species, it is suggested that the control of salivation is similar throughout the ixodid family.

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