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Titolo:
Phlebotomus papatasi and Leishmania major parasites express alpha-amylase and alpha-glucosidase
Autore:
Jacobson, RL; Schlein, Y;
Indirizzi:
Hebrew Univ Jerusalem, Sch Med, Kuvin Ctr Study Infect & Trop Dis, Dept Parasitol, IL-91120 Jerusalem, Israel Hebrew Univ Jerusalem Jerusalem Israel IL-91120 -91120 Jerusalem, Israel
Titolo Testata:
ACTA TROPICA
fascicolo: 1, volume: 78, anno: 2001,
pagine: 41 - 49
SICI:
0001-706X(20010115)78:1<41:PPALMP>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
PERFORMANCE LIQUID-CHROMATOGRAPHY; LUTZOMYIA-LONGIPALPIS; HONEYDEW SUGARS; SALIVARY-GLANDS; SANDFLY VECTOR; AEDES-AEGYPTI; MOSQUITO; DIPTERA; MIDGUT; GLYCOSIDASES;
Keywords:
Phlebotomus papatasi; Leishmania; trypanosomatids; alpha-amylase; alpha-glucosidase;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
38
Recensione:
Indirizzi per estratti:
Indirizzo: Jacobson, RL Hebrew Univ Jerusalem, Sch Med, Kuvin Ctr Study Infect & TropDis, Dept Parasitol, IL-91120 Jerusalem, Israel Hebrew Univ Jerusalem Jerusalem Israel IL-91120 lem, Israel
Citazione:
R.L. Jacobson e Y. Schlein, "Phlebotomus papatasi and Leishmania major parasites express alpha-amylase and alpha-glucosidase", ACT TROP, 78(1), 2001, pp. 41-49

Abstract

Alpha-amylase and alpha -glucosidase activities were found in homogenates of young, unfed male and female Phlebotomus papatasi and in gut and salivary gland preparations. A significant increase in both enzyme activities in females and of alpha -amylase in male's was recorded for flies that had fed overnight on a plant (Capparis spinosa). After plant feeding, alpha -amylase activity was relatively lower in female salivary glands and higher in guts, while in the males the activity in the salivary glands had increased. Alpha-glucosidase activity increased in guts of both sexes and in the salivary glands of the females. In addition, alpha -amylase activity was found in preparations of Leishmania major and L. infantum promastigotes, but not in those of L. donovani or L. tropica. Alpha-glucosidase activity was present in promastigote preparations of L. major, L. infantum, L. donovani, L. braziliensis, Crithidia fasciculata and Herpetomonas muscarum. It was lacking in similar preparations of L. tropica, Sauroleishmania agamae or Leptomonas seymouri. The growth rate of L. major promastigotes in medium supplemented with starch or with glucose was similar and it was significantly higher than in glucose poor medium. In this study, we demonstrate that P. papatasi and L. major possess the enzymes for hydrolyzing starch grains that are included in the plant tissue-diet of the sand flies. (C) 2001 Elsevier Science B. V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 03/06/20 alle ore 09:45:33