Abstract:
:The diuretic activity of the helicokinins I (YFSPWG-amide), II (VRFSPWG-amide) and III (KVKFSAWG-amide) was tested on Heliothis virescens larvae. All three kinins increased fluid secretion in isolated Malpighian tubules in a dose-dependent manner. Injections into the haemolymph caused a significant reduction in weight gain after 24 h and, in the case of helicokinin I, led to an increased mortality of 43% within 6 days. When truncated analogues of helicokinin I were tested in vitro, only the pentapeptide (FSPWG-amide) stimulated fluid secretion. Tested in vivo the pentapeptide did not influence normal development of the larvae. An alanine scan of helicokinin I showed that the substitution of phenylalanine, tryptophan and glycine led to a massive decrease or even loss of diuretic activity. The substitution of the other amino acids had no effect in vitro. The ACE inhibitors captopril, enalapril-maleate and lisinopril were tested for their influence on the development of the larvae. In combination with one of the helicokinins the in vivo injection of the ACE inhibitors led to increased rates of mortality and/or reductions in pupal weight.
journal_name
J Insect Physioljournal_title
Journal of insect physiologyauthors
Seinsche A,Dyker H,Lösel P,Backhaus D,Scherkenbeck Jdoi
10.1016/s0022-1910(00)00065-2keywords:
subject
Has Abstractpub_date
2000-11-01 00:00:00pages
1423-1431issue
11eissn
0022-1910issn
1879-1611pii
S0022191000000652journal_volume
46pub_type
杂志文章abstract::Most epithelia contain multiple cell types that interact to perform the roles required of the tissue. In insect epithelia, the apical plasma membrane V-ATPase dominates ion-transport models, and (as in vertebrates) is usually found in specialized intercalated cell types or regions. The Malpighian tubules of several in...
journal_title:Journal of insect physiology
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abstract::Flight behaviors in various insect species are closely correlated with their mechanical and neuronal properties. Compared to locusts and flies which have been intensively studied, moths have "intermediate" properties in terms of the neurogenic muscle activations, power generation by indirect muscles, and two-winged-in...
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journal_title:Journal of insect physiology
pub_type: 杂志文章
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pub_type: 杂志文章
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journal_title:Journal of insect physiology
pub_type: 杂志文章
doi:10.1016/j.jinsphys.2004.10.003
更新日期:2005-01-01 00:00:00
abstract::Male Katydids (Orthoptera: Tettigoniidae) rub together their specialised forewings to produce sound, a process known as stridulation. During wing closure, a lobe on the anal margin of the right forewing (a scraper), engages with a tooth-covered file on the left forewing. The movement of the scraper across the file pro...
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pub_type: 杂志文章
doi:10.1016/j.jinsphys.2018.08.004
更新日期:2018-10-01 00:00:00
abstract::Prey utilisation at low prey densities was determined for third instar Cueta sp., Furgella intermedia (Markl) and Palpares annulatus (Stitz) larvae in terms of wet weight, dry weight, energy and nutrients. Prey utilisation was similar to other insects on a wet weight (42-47%), dry weight (46-49%), energetic (40-58%) a...
journal_title:Journal of insect physiology
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journal_title:Journal of insect physiology
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journal_title:Journal of insect physiology
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doi:10.1016/j.jinsphys.2018.06.003
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journal_title:Journal of insect physiology
pub_type: 杂志文章
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journal_title:Journal of insect physiology
pub_type: 杂志文章
doi:10.1016/j.jinsphys.2012.04.009
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journal_title:Journal of insect physiology
pub_type: 杂志文章
doi:10.1016/j.jinsphys.2009.03.007
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journal_title:Journal of insect physiology
pub_type: 杂志文章
doi:10.1016/s0022-1910(99)00188-2
更新日期:2000-03-01 00:00:00
abstract::Plodia interpunctella (Hübner) is an important stored grain insect pest worldwide, and the first lepidopteran with reported resistance to Bacillus thuringiensis (Bt) toxins. Since gut bacteria may affect Bt insecticidal activity, we evaluated whether P. interpunctella lacking gut bacteria had differences in immune res...
journal_title:Journal of insect physiology
pub_type: 杂志文章
doi:10.1016/j.jinsphys.2017.01.020
更新日期:2017-04-01 00:00:00
abstract::The effect of male accessory gland substances on female reproductive physiology has been previously described as "activating" egg development. However, no mechanism has been described that can explain how male mosquitoes are able to influence egg development in female mosquitoes. To investigate how male mosquitoes are...
journal_title:Journal of insect physiology
pub_type: 杂志文章
doi:10.1016/j.jinsphys.2014.03.006
更新日期:2014-05-01 00:00:00
abstract::Animals often alter their food choices following a pathogen infection in order to increase immune function and combat the infection. Whether social animals that collect food for their brood or nestmates adjust their nutrient intake to the infection states of their social partners is virtually unexplored. Here we devel...
journal_title:Journal of insect physiology
pub_type: 杂志文章
doi:10.1016/j.jinsphys.2017.08.005
更新日期:2018-04-01 00:00:00
abstract::A diapause-specific peptide (DSP) composed of 41 amino acid residues including 6 cysteines, has been isolated from diapausing adults of the leaf beetle Gastrophysa atrocyanea. In this study, DSP was found to be expressed primarily in diapausing adults and to a minor extent in pupae, but not in eggs, larvae, or post-di...
journal_title:Journal of insect physiology
pub_type: 杂志文章
doi:10.1016/j.jinsphys.2005.03.018
更新日期:2005-06-01 00:00:00
abstract::The ability of organisms to adapt to fluctuating food conditions is essential for their survival and reproduction. Accumulating energy reserves, such as lipids, in anticipation of harsh conditions, will reduce negative effects of a low food supply. For Hymenoptera and Diptera, several parasitoid species lack adult lip...
journal_title:Journal of insect physiology
pub_type: 杂志文章,评审
doi:10.1016/j.jinsphys.2008.07.014
更新日期:2008-09-01 00:00:00
abstract::Certain male fruit flies from the genera Bactrocera and Zeugodacus (Diptera: Tephritidae) actively forage for floral semiochemicals produced by some endemic Bulbophyllum orchids found in tropical and subtropical forests. These floral semiochemicals are largely classified as either phenylbutanoids (e.g., raspberry keto...
journal_title:Journal of insect physiology
pub_type: 杂志文章
doi:10.1016/j.jinsphys.2019.103949
更新日期:2019-01-01 00:00:00