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M9620211.TXT
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1996-02-26
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Document 0211
DOCN M9620211
TI Feeding the mosquito Aedes aegypti with TMOF and its analogs; effect on
trypsin biosynthesis and egg development.
DT 9602
AU Borovsky D; Mahmood F; University of Florida, IFAS, Florida Medical
Entomology; Laboratory, Vero Beach 32962, USA.
SO Regul Pept. 1995 Jun 27;57(3):273-81. Unique Identifier : AIDSLINE
MED/96070307
AB Female Aedes aegypti that were given a blood meal by enema deposited
yolk in their oocytes and synthesized trypsinlike enzymes in their
midgut. When females were given an enema of Aea-TMOF (Trypsin Modulating
Oostatic Factor) (NH2-YDPAPPPPPP-COOH) and blood both egg development
and trypsin biosynthesis were inhibited. Similar results were observed
if TMOF was mixed with the blood meal and fed to female mosquitoes
through a membrane. Renin inhibitor (NH2-PHPFHFFVYK-COOH) or poly
proline given by enema with the blood meal did not affect egg
development or trypsin biosynthesis. Feeding of TMOF analogs P1
(NH2-YDPAP-COOH) or P4 (NH2-YDPAPPPP-COOH) inhibited trypsin
biosynthesis in the midgut. Injecting or giving an enema of an amidated
peptide (NH2-WRPGPPPPPP-CONH2) of HIV-2 X-ORF protein also inhibited egg
development and trypsin biosynthesis in the mosquito gut. When [3H]TMOF
was purified by high performance liquid chromatography (HPLC) and fed
with the blood meal through a membrane to female mosquitoes, [3H]TMOF
outside the gut increased linearly for the first 24 h and 28% of the
hormone was found outside the gut at 72 h. These results suggest that
TMOF and its active analogs traverse the gut epithelial cells into the
hemolymph, bind TMOF gut receptor(s) and modulate trypsin biosynthesis.
DE Aedes/*DRUG EFFECTS/EMBRYOLOGY Amino Acid Sequence Animal Biological
Transport Blood/PHYSIOLOGY Enema Female Hemolymph/METABOLISM Insect
Hormones/*PHARMACOLOGY/PHARMACOKINETICS Intestinal Mucosa/CYTOLOGY/DRUG
EFFECTS/METABOLISM Molecular Sequence Data
Oligopeptides/*PHARMACOLOGY/PHARMACOKINETICS Ovum/*DRUG EFFECTS
Support, Non-U.S. Gov't Support, U.S. Gov't, Non-P.H.S.
Trypsin/*BIOSYNTHESIS JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).