Characterisation of a novel Kunitz-type molecule from the trematode Fasciola hepatica

1995 ◽  
Vol 74 (1) ◽  
pp. 19-29 ◽  
Author(s):  
S.Esther Bozas ◽  
Michael Panaccio ◽  
Jenette Creaney ◽  
Marina Dosen ◽  
James C. Parsons ◽  
...  
PLoS ONE ◽  
2014 ◽  
Vol 9 (12) ◽  
pp. e114505 ◽  
Author(s):  
Cristian R. Falcón ◽  
Diana Masih ◽  
Gerardo Gatti ◽  
María Cecilia Sanchez ◽  
Claudia C. Motrán ◽  
...  

2020 ◽  
Vol 11 ◽  
Author(s):  
Leonardo Silvane ◽  
Daiana Pamela Celias ◽  
Pablo Alberto Romagnoli ◽  
Belkys Angélica Maletto ◽  
María Fernanda Sanchez Vallecillo ◽  
...  

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Lorena Favaro Pavon ◽  
David Capper ◽  
Tatiana Tais Sibov ◽  
Silvia Regina Caminada de Toledo ◽  
Ulrich-W. Thomale ◽  
...  

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
David Smith ◽  
Krystyna Cwiklinski ◽  
Heather Jewhurst ◽  
Irina G. Tikhonova ◽  
John P. Dalton

AbstractFasciola hepatica is a global parasite of humans and their livestock. Regulation of parasite-secreted cathepsin L-like cysteine proteases associated with virulence is important to fine-tune parasite-host interaction. We uncovered a family of seven Kunitz-type (FhKT) inhibitors dispersed into five phylogenetic groups. The most highly expressed FhKT genes (group FhKT1) are secreted by the newly excysted juveniles (NEJs), the stage responsible for host infection. The FhKT1 inhibitors do not inhibit serine proteases but are potent inhibitors of parasite cathepsins L and host lysosomal cathepsin L, S and K cysteine proteases (inhibition constants < 10 nM). Their unusual inhibitory properties are due to (a) Leu15 in the reactive site loop P1 position that sits at the water-exposed interface of the S1 and S1′ subsites of the cathepsin protease, and (b) Arg19 which forms cation-π interactions with Trp291 of the S1′ subsite and electrostatic interactions with Asp125 of the S2′ subsite. FhKT1.3 is exceptional, however, as it also inhibits the serine protease trypsin due to replacement of the P1 Leu15 in the reactive loop with Arg15. The atypical Kunitz-type inhibitor family likely regulate parasite cathepsin L proteases and/or impairs host immune cell activation by blocking lysosomal cathepsin proteases involved in antigen processing and presentation.


2015 ◽  
Vol 29 (S1) ◽  
Author(s):  
Mario Pacheco ◽  
Juliana Sciani ◽  
Katia Morais ◽  
Sonia Andrade ◽  
Ana Marisa Chudzinski‐Tavassi
Keyword(s):  

PLoS ONE ◽  
2014 ◽  
Vol 9 (12) ◽  
pp. e111907 ◽  
Author(s):  
Mario T. F. Pacheco ◽  
Carolina M. Berra ◽  
Kátia L. P. Morais ◽  
Juliana M. Sciani ◽  
Vania G. Branco ◽  
...  

1964 ◽  
Vol 2 (3) ◽  
pp. 170 ◽  
Author(s):  
Byong Seol Seo ◽  
Han Jong Rim ◽  
Kwang Soo Kim ◽  
Sang Don Rhee ◽  
Sun Jo Lim ◽  
...  
Keyword(s):  

2018 ◽  
Vol 12 (2) ◽  
pp. 108-116
Author(s):  
A.M. Ustinov ◽  
R.T. Safiullin ◽  
R.R. Safiullin

Information is provided on the causative agents of fasciolosis and the developmental biology of Fasciola hepatica. Fasciolosis of cattle is widespread in the conditions of the Kaluga Region and the Central Federal District on farms of different forms of ownership. The greatest number of F. hepatica eggs in 1 g of feces in cattle is established in JSC "Iskra" - 175,4 specimens, the lowest - in the samples from cows from private farms - 87,6 sp. At the opening slaughter of cattle at meat processing plants region and slaughterhouses invasion of their fasciolae was 34.8%. The average number fascial one infected animal was 32.1 specimens, including adult - and larval specimens of 25.2 and 6.9 copies At veterinary-sanitary expertise and helminthological autopsy of the liver, gallbladder and bile ducts installed year-round invasion fasciolae mainly in the adult stage. Young animals of the current year are infected with fasciola in the pasture massly in August-September, and the extent of invasion in November was 4.3%, for winter-stabling months an average of 12.6%, in March - 17.9% and in April after de-worming - 5.9%.The data obtained in the study of the distribution of the small pond has shown that in the Kaluga region these mollusks are widespread. In this case, the invasion of the small pond snail by larval forms of fasciolae in different years has its own peculiarities, which are influenced by climatic factors.The different dosage forms of clozantel - Rolenol and Santel and Genamectin with mixed fascioliasis and hypodermatosis of bovine in the recommended dose against subcutaneous gadfly larvae - provided 100% efficacy. The tested dosage forms of clozantel are similar in effectiveness against subcutaneous gadfly larvae (EE-100%) and fasciol (EE-95 and 90%, IE-97.4 and 96.3%).The therapeutic and economic effectiveness of complex domestic preparations of Helmicide and Fascocida in spontaneous fascioliasis of cattle is studied.


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