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Schistosoma japonicum: the chemical nature of the secretion produced by the Mehlis' gland

100%
Moczon T., Swiderski Z.
Wiadomości Parazytologiczne
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1998
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tom 44
|
nr 3
2

Comparative analysis of codon usage pattern and its influencing factors in Schistosoma japonicum and Ascaris suum

84%
Mazumder G. A., Uddin A., Chakraborty S.
Acta Parasitologica
|
2017
|
tom 62
|
nr 4
3

Schistosoma japonicum: the design and experimental evaluation of a multivalent DNA vaccine

84%
Li C., Yu L., Liu Z., Zhu L., Hu Y., Zhu M., Zhu X., Shi Y., Meng S.
Cellular and Molecular Biology Letters
|
2006
|
tom 11
|
nr 4
The aim of this study was to construct and evaluate the immunity efficacy of the DNA multivalent vaccine pVIVO2SjFABP-23. The vaccine was constructed and produced as follows. Forty BALB/c mice were divided into four groups designated pVIVO2, pVIVO2Sj23, pVIVO2SjFABP and pVIVO2SjFABP-23. Each mouse was immunized with 100 µg of the corresponding plasmid DNA by intramuscular injection. 28 days postvaccination, the mice were challenged with S. japonicum cercariae, and the worm and egg burdens were determined 42 days post-challenge. Serum samples were collected from all the mice before and after vaccination and at the end of the experiment, and used for antibody detection. The IFN-γ and IL-4 levels were quantified in the supernatants of specifically stimulated spleen cells. The number of worms was reduced by 52%, 40% and 42% in mice respectively immunized with pVIVO2SjFABP-23, pVIVO2Sj23 or pVIVO2SjFABP. A respective 61%, 38% and 39% egg reduction was determined relative to those mice that only received the empty pVIVO2 plasmid. pVIVO2SjFABP-23 immunization increased IgG levels against SWAP and SEA. Increased IFN-γ levels were detected in the supernatant of specific stimulated spleen cells from mice immunized with the 3 different constructs. The multivalent DNA vaccine developed induced higher levels of protection than the two monovalent tested vaccines.
4

Uklad naczyniowy zwierzat miejscem bytowania pasozytow

67%
Soltysiak Z., Pawlas-Opiela M., Piekarska J.
Życie Weterynaryjne
|
2007
|
tom 82
|
nr 09
750-752
5

Effects of niclosamide on Oncomelania hupensis, the intermediate snail host of Schistosoma japonicum: an enzyme-histochemical study

67%
Wang W., Li H., Liang Y., Dai J.
Acta Parasitologica
|
2009
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tom 54
|
nr 2
172-179
An enzyme-histochemical study of five enzymes, namely succinate dehydrogenase (SDH), lactate dehydrogenase (LDH), cytochrome oxidase (CCO), cholinesterase (CHE) and nitric oxide synthase (NOS), was elucidated in the soft tissues of Oncomelania hupensis, the intermediate host snail of Schistosoma japonicum, before and after the treatment with a suspension concentrate of niclosamide (SCN). Following the treatment of SCN, a marked loss occurred in the activity of the five enzymes mentioned above. LDH and SDH showed their strongest activity in the buccal mass and muscular fibers, CCO in buccal mass and liver, CHE in pellicle and ganglia, and NOS in muscular fibers and pharyngeal canal. The results indicate that SCN impairs the activities of the enzymes influencing the transfer of neurotransmitter and energy supply in O. hupensis, ultimately leading to the loss of various physiological functions, which is considered to be a cause of death in O. hupensis.
6

Schistosoma japonicum: Cytochemistry of the Mehlis' gland and of the ootype wall

67%
Moczon T., Swiderski Z.
Acta Parasitologica
|
2000
|
tom 45
|
nr 1
Secretory granules produced by the Mehlis’ gland and by the wall of the distal ootype in Schistosoma japonicum females were periodate reactive, stained intensely with a phosphotungstic acid-HCl mixture at pH  0.9, and showed no presence of sulphydryl, carboxyl and sulphate groups. These results as well as the sensitivity ol the granules to the proteolytic action of papain indicated that the secretions produced by the Mehlis’ gland and by the ootype wall were neutral glycoproteins.
7

Isolation of the cDNAs encoding secreted and membrane binding proteins from egg of Schistosoma japonicum [Chinese strain]

67%
Yu C., Zhang F., Yin X., Kikuchi M., Hirayama K.
Acta Parasitologica
|
2008
|
tom 53
|
nr 1
The granulomatous reaction which occurs around egg trapped in the intrahepatic venules ultimately may lead to fibrosis, which is the main pathogenesis of schistosomiasis. The excreted proteins from eggs play an important role during this process, and they may be a target for developing new strategies to control the hepatic pathogenesis caused by schistosome infection. In this study, fifteen genes encoding secreted or membrane binding protein were identified with the signal sequence trapping method by retrovirus mediated expression screening (SST-REX) of cDNAs from the egg of Schistosoma japonicum (Chinese strain).
8

Histochemical and enzyme-histochemical studies of Oncomelania hupensis (Gredler, 1881), the intermediate host of Schistosoma japonicum

59%
Wang W., Dai J., Li H., Liang Y.
Acta Parasitologica
|
2011
|
tom 56
|
nr 1
The distribution of glycogen, DNA and histone, and localization of activity of ten enzymes such as glucose-6-phosphatase (G-6-Pase), cytochrome oxidase (CCO), lactate dehydrogenase (LDH), 5′-nucleotidase (5′-NT), succinate dehydrogenase (SDH), glucose-6-phosphate dehydrogenase (G-6-PDH), alkaline phosphatase (ALP), acid phosphatase (ACP), Mg2+-adenosine triphosphatase (Mg2+-ATPase), and cholinesterase (CHE) in Oncomelania hupensis (Gredler, 1881) snails, the intermediate host of Schistosoma japonicum, was surveyed using the histochemical and enzyme-histochemical techniques. The results showed that the glycogen with high activity was widely distributed in snails. DNA showed its strongest reaction in testis. The histone was distributed in sites of the radula, parenchyma of penis and ovary. LDH and SDH were widely distributed in snails and all were abundant. Sites of the strongest enzyme activities of G-6-PDH were evident in the reproductive system together with central ganglia. Only the ovary showed a strong enzyme activity of G-6-Pase. Most tissues and organs contained CCO, and the activity of this enzyme was very strong. 5′-NT showed a strong enzyme activity in the ovary and testis. Mg2+-ATPase was localized in sites of the liver, stomach and reproductive gland. A strong enzyme activity of ALP appeared in the digestive system. ACP showed a low activity in snails. The central ganglia, nervous stem, liver, branchial duct, epithelia of the head and foot regions showed a very strong enzyme activity of CHE. The findings could provide a theoretical basis for development of highly effective molluscicides with low toxicity to other biota, as well as means for novel snail control strategies.
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