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https://www.readbyqxmd.com/read/28431921/optimization-of-the-helmintex-method-for-schistosomiasis-diagnosis
#1
Vivian Favero, Renata Russo Frasca Candido, Carolina De Marco Verissimo, Malcolm K Jones, Timothy G St Pierre, Catieli Gobetti Lindholz, Vinicius Duval Da Silva, Alessandra Loureiro Morassutti, Carlos Graeff-Teixeira
A diagnostic test that is reliable, sensitive, and applicable in the field is extremely important in epidemiological surveys, during medical treatment for schistosomiasis, and for the control and elimination of schistosomiasis. The Helmintex (HTX) method is based on the use of magnetic beads to trap eggs in a magnetic field. This technique is highly sensitive, but the screening of fecal samples consumes lots of time, thus delaying the results, especially in field studies. The objective of this work was to determine the effects of incorporation of the detergent Tween-20 into the method in an attempt to decrease the final pellet volume produced by the HTX method as well as the use of ninhydrin to stain the Schistosoma mansoni eggs...
April 19, 2017: Experimental Parasitology
https://www.readbyqxmd.com/read/28430889/accuracy-of-diagnostic-tests-for-schistosoma-mansoni-infection-in-asymptomatic-eritrean-refugees-serology-and-poc-cca-against-stool-microscopy
#2
Afona Chernet, Kerstin Kling, Véronique Sydow, Esther Kuenzli, Christoph Hatz, Jürg Utzinger, Lisette van Lieshout, Hanspeter Marti, Niklaus D Labhardt, Andreas Neumayr
Background: The unprecedented increase in number of African refugees arriving in Europe is confronting clinicians and general practitioners with the question of whether or not and how to screen migrants from endemic regions for Schistosoma mansoni infection. Methods: We assessed the accuracy of three different diagnostic tests for S.mansoni infection (stool microscopy [samples prepared by sedimentation technique], serology, and point-of-care circulating cathodic antigen [POC-CCA] urine cassette test) in 107 newly arrived asymptomatic Eritrean refugees in Switzerland...
April 19, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28419526/soluble-egg-antigen-activates-m2-macrophages-via-the-stat6-and-pi3k-pathways-and-schistosoma-japonicum-alternatively-activates-macrophage-polarization-to-improve-the-survival-rate-of-septic-mice
#3
Hao Tang, Yan-Bing Liang, Zhi-Bin Chen, Lin-Lin Du, Li-Jin Zeng, Jing-Guo Wu, Wen Yang, Hua-Ping Liang, Zhong-Fu Ma
Sepsis is one of the most challenging health problems worldwide. Our previous study showed that chronic schistosoma japonica (SJ) infection might increase serum anti-inflammatory factors to play a protective role, thus improving the survival rate of septic mice. Further research revealed that SJ infection promoted J774A.1 macrophage differentiation into M2 macrophages; suppressed LPS-induced activation of M1 macrophages; up-regulated CD163, IL-10 and TGF-β1 expression; inhibited TNF-α and iNOS expression; and blocked the effect of LPS-promoted TNF-α and iNOS expression...
April 17, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28416001/assessing-environmental-factors-associated-with-regional-schistosomiasis-prevalence-in-anhui-province-peoples-republic-of-china-using-a-geographical-detector-method
#4
Yi Hu, Congcong Xia, Shizhu Li, Michael P Ward, Can Luo, Fenghua Gao, Qizhi Wang, Shiqing Zhang, Zhijie Zhang
BACKGROUND: Schistosomiasis is a water-borne disease caused by trematode worms belonging to genus Schistosoma, which is prevalent most of the developing world. Transmission of the disease is usually associated with multiple biological characteristics and social factors but also factors can play a role. Few studies have assessed the exact and interactive influence of each factor promoting schistosomiasis transmission. METHODS: We used a series of different detectors (i...
April 17, 2017: Infectious Diseases of Poverty
https://www.readbyqxmd.com/read/28412409/development-of-monoclonal-antibodies-against-sj29-and-its-possible-application-for-schistosomiasis-diagnosis
#5
Cui-Ping Ren, Quan Liu, Feng-Chun Liu, Feng-Yu Zhu, Shi-Xiang Cui, Zhen Liu, Wen-Da Gao, Miao Liu, Yong-Sheng Ji, Ji-Jia Shen
OBJECTIVE: Timely Schistosoma japonicum detection improves outcomes in schistosomiasis. Here, we established a double antibody sandwich ELISA to detect Schistosoma japonicum. METHODS: Sj29 polyclonal and monoclonal antibodies were developed and identified. A Sj29 double antibody sandwich ELISA was evaluated. RESULTS: Assay sensitivity for detecting Schistosoma japonicum circulating antigen Sj29 was 76.7% (23/30), 54.5% (18/33) and 50.0% (18/36) in patients with acute, chronic and advanced schistosomiasis...
April 12, 2017: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/28410369/quantitative-assessment-of-the-impact-of-partially-protective-anti-schistosomiasis-vaccines
#6
Ramzi A Alsallaq, David Gurarie, Martial Ndeffo Mbah, Alison Galvani, Charles King
BACKGROUND: Mass drug administration (MDA) of praziquantel has been the intervention of choice against schistosomiasis but with limited success in interrupting the transmission. The development of anti-Schistosoma vaccines is underway. Our objective is to quantify the population-level impact of anti-Schistosoma vaccines when administered alone and in combination with mass drug administration (MDA) and determine factors in vaccine design and public health implementation that optimize vaccination role in schistosomiasis control and elimination...
April 14, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28408356/possible-antifibrotic-effect-of-gdc-0449-vismodegib-a-hedgehog-pathway-inhibitor-in-mice-model-of-schistosoma-induced-liver-fibrosis
#7
Abeer A Elhenawy, Rehab H Ashour, Nairmen Nabih, Naglaa M Shalaby, Nirmeen Megahed
Liver fibrosis is a pathological process complicating schistosomiasis. It is an active process of continuous extracellular matrix accumulation. In Egypt, schistosomiasis re-infection is a continuing problem especially in rural areas. In this study we examined the antifibrotic effect of GDC-0449 (Vismodegib), a hedgehog-pathway inhibitor as a new molecular target for Schistosoma-induced liver fibrosis, in addition to exploring its effect as antischistosomal drug. The effect of GDC-0449 alone or combined with Praziquantel was tried experimentally in infected mice with Schistosoma mansoni...
April 10, 2017: Parasitology International
https://www.readbyqxmd.com/read/28408098/population-genetics-of-the-schistosoma-snail-host-bulinus-truncatus-in-egypt
#8
Rima Zein-Eddine, Félicité F Djuikwo-Teukeng, Yasser Dar, Gilles Dreyfuss, Frederik Van den Broeck
The tropical freshwater snail Bulinus truncatus serves as an important intermediate host of several human and cattle Schistosoma species in many African regions. Despite some ecological and malacological studies, there is no information on the genetic diversity of B. truncatus in Egypt. Here, we sampled 70-100 snails in ten localities in Upper Egypt and the Nile Delta. Per locality, we sequenced 10 snails at a partial fragment of the cytochrome c oxidase subunit 1 gene (cox1) and we genotyped 25-30 snails at six microsatellite markers...
April 10, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28407808/nested-pcr-assay-for-detection-of-schistosoma-japonicum-infection-in-domestic-animals
#9
Xin Zhang, Chuan-Chuan He, Jin-Ming Liu, Hao Li, Ke Lu, Zhi-Qiang Fu, Chuan-Gang Zhu, Yi-Ping Liu, Lai-Bao Tong, De-Bao Zhou, Li Zha, Yang Hong, Ya-Mei Jin, Jiao-Jiao Lin
BACKGROUND: Schistosomiasis japonica is a common zoonosis. Domestic animals are the primary source of infection and play an important role in disease transmission. The prevalence and infectivity of this disease in domestic animals in China have significantly decreased and, for this reason, diagnostics with a higher sensitivity have become increasingly necessary. It was reported that polymerase chain reaction (PCR)-based methods could be used to detect schistosome infection in humans and animals and presented a high sensitivity and specificity...
April 13, 2017: Infectious Diseases of Poverty
https://www.readbyqxmd.com/read/28407789/identification-and-functional-characterisation-of-a-schistosoma-japonicum-insulin-like-peptide
#10
Xiaofeng Du, Donald P McManus, Pengfei Cai, Wei Hu, Hong You
BACKGROUND: Previous studies have shown that insulin receptors in schistosomes, triggered by host insulin, play an important role in parasite growth, development and fecundity by regulating glucose metabolism. However, limited information is available on the recently identified endogenous insulin-like peptide (ILP) in blood flukes. RESULTS: We isolated ILPs from Schistosoma japonicum (SjILP) and S. recognised (SmILP) and present results of their molecular and structural analysis...
April 14, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28406899/histone-deacetylase-inhibition-modulates-histone-acetylation-at-gene-promoter-regions-and-affects-genome-wide-gene-transcription-in-schistosoma-mansoni
#11
Letícia Anderson, Monete Rajão Gomes, Lucas Ferreira daSilva, Adriana da Silva Andrade Pereira, Marina M Mourão, Christophe Romier, Raymond Pierce, Sergio Verjovski-Almeida
BACKGROUND: Schistosomiasis is a parasitic disease infecting hundreds of millions of people worldwide. Treatment depends on a single drug, praziquantel, which kills the Schistosoma spp parasite only at the adult stage. HDAC inhibitors (HDACi) such as Trichostatin A (TSA) induce parasite mortality in vitro (schistosomula and adult worms), however the downstream effects of histone hyperacetylation on the parasite are not known. METHODOLOGY/PRINCIPAL FINDINGS: TSA treatment of adult worms in vitro increased histone acetylation at H3K9ac and H3K14ac, which are transcription activation marks, not affecting the unrelated transcription repression mark H3K27me3...
April 13, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28395189/novel-carbazole-aminoalcohols-as-inhibitors-of-%C3%AE-hematin-formation-antiplasmodial-and-antischistosomal-activities
#12
Weisi Wang, Qiang Li, Yufen Wei, Jian Xue, Xiao Sun, Yang Yu, Zhuo Chen, Shizhu Li, Liping Duan
Malaria and schistosomiasis are two of the most socioeconomically devastating parasitic diseases in tropical and subtropical countries. Since current chemotherapeutic options are limited and defective, there is an urgent need to develop novel antiplasmodials and antischistosomals. Hemozoin is a disposal product formed from the hemoglobin digestion by some blood-feeding parasites. Hemozoin formation is an essential process for the parasites to detoxify free heme, which is a reliable therapeutic target for identifying novel antiparasitic agents...
April 2, 2017: International Journal for Parasitology, Drugs and Drug Resistance
https://www.readbyqxmd.com/read/28393916/production-and-glyco-engineering-of-immunomodulatory-helminth-glycoproteins-in-plants
#13
Ruud H P Wilbers, Lotte B Westerhof, Kim van Noort, Katja Obieglo, Nicole N Driessen, Bart Everts, Sonja I Gringhuis, Gabriele Schramm, Aska Goverse, Geert Smant, Jaap Bakker, Hermelijn H Smits, Maria Yazdanbakhsh, Arjen Schots, Cornelis H Hokke
Helminth parasites control host-immune responses by secreting immunomodulatory glycoproteins. Clinical trials and mouse model studies have demonstrated the potential of helminth-derived glycoproteins for the treatment of immune-related diseases, like allergies and autoimmune diseases. Studies are however hampered by the limited availability of native parasite-derived proteins. Moreover, recombinant protein production systems have thus far been unable to reconstitute helminth-like glycosylation essential for the functionality of some helminth glycoproteins...
April 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28393260/identification-of-biomarkers-for-schistosoma-associated-pulmonary-arterial-hypertension-based-on-rna-seq-data-of-mouse-whole-lung-tissues
#14
Yanbin Sun, Xin Lin, Lei Li
BACKGROUND: Pulmonary arterial hypertension (PAH) is a deadly disease, and the molecular mechanism of PAH has not been clarified clearly. The objective of this study was to identify possible biomarkers and explore the potential mechanisms of Schistosoma-induced PAH. METHODS: GSE49114 RNA-Seq data developed from mouse whole lung tissues were downloaded from the Gene Expression Omnibus database. Differentially expressed genes (DEGs) between control samples and schistosomiasis-induced PAH samples were identified by the edgeR software...
April 9, 2017: Lung
https://www.readbyqxmd.com/read/28392476/schistosoma-mansoni-displays-an-adenine-phosphoribosyltransferase-preferentially-expressed-in-mature-female-gonads-and-vitelaria
#15
Ana Eliza Zeraik, Vitor Hugo Balasco Serrão, Larissa Romanello, Juliana Roberta Torini, Alexandre Cassago, Ricardo DeMarco, Humberto D'Muniz Pereira
Schistosoma mansoni depends upon the purine salvage pathway to obtain purine nucleotides; therefore, enzymes from this pathway are essential for parasite survival. Here, we focused on the adenine phosphoribosyltransferase (APRT) enzyme, which catalyzes the condensation reaction between adenine and PRPP (5-phosphoribosylpyrophosphate) to produce AMP and PPi. Kinetic experiments using the heterologously expressed protein of one APRT isoform from S. mansoni indicate that it is catalytically active, and whole-mount in situ hybridization studies indicate that the transcripts of this protein are concentrated in the posterior region of the ovary and vitellaria of female adult worms...
April 6, 2017: Molecular and Biochemical Parasitology
https://www.readbyqxmd.com/read/28389350/process-development-for-production-and-purification-of-the-schistosoma-mansoni-sm14-antigen
#16
Leonardo Damasceno, Gerd Ritter, Carl A Batt
The trematode Schistosoma mansoni Sm14 antigen was expressed in the yeast Pichia pastoris and secreted into the culture medium at yields of approximately 250 mg L(-1). Sm14 belongs to a family of fatty-acid binding proteins and appears to play an important role in uptake, transport, and compartmentalization of lipids in S. mansoni and it is a potential vaccine candidate in both humans and domesticated animals. The Sm14 gene was codon-optimized for expression in P. pastoris, and placed under transcription of the strong methanol inducible AOX1 promoter...
April 5, 2017: Protein Expression and Purification
https://www.readbyqxmd.com/read/28388965/a-novel-colloidal-gold-immunochromatography-assay-strip-for-the-diagnosis-of-schistosomiasis-japonica-in-domestic-animals
#17
Rui Xu, Jintao Feng, Yang Hong, Chao Lv, Dengyun Zhao, Jiaojiao Lin, Ke Lu, Hao Li, Jinming Liu, Xiaodan Cao, Tao Wang, Jinli Zai, Zhaozhe Wang, Bingguang Jia, Qian Han, Chuangang Zhu
BACKGROUND: Schistosomiasis remains a major public health concern in China and an epidemiological survey has revealed that schistosome-infected bovines and goats are the main transmission sources for the disease. Therefore, development of a sensitive technique for the diagnosis of schistosomiasis in domestic animals is necessary. METHOD: A novel colloidal gold immunochromatography assay (GICA) strip was developed for detecting Schistosoma japonicum in domestic animals...
April 7, 2017: Infectious Diseases of Poverty
https://www.readbyqxmd.com/read/28385590/characterization-and-expression-pattern-of-a-novel-frizzled-8-receptor-gene-in-schistosoma-japonicum
#18
Jingxiu Xu, Xingang Feng, Yingying Jia, Yang Hong, Hao Li, Ke Lu, Jiaojiao Lin, Chunxiu Yuan, Mingxin Song
Wnt signaling as mediated by the Frizzled family receptors plays a vital role in the early development of animal embryos, organ formation, tissue regeneration and other physiological processes. In the present study, a novel Frizzled member, SjFz8, was isolated and characterized in Schistosoma japonicum. SjFz8 encodes an 1162-amino-acid protein with typical characteristics of Frizzled proteins. Quantitative real-time polymerase chain reaction analysis indicated that SjFz8 transcript level was highest in 7-day-old schistosomula...
April 3, 2017: Parasitology International
https://www.readbyqxmd.com/read/28385163/interruption-of-schistosomiasis-transmission-in-mountainous-and-hilly-regions-with-an-integrated-strategy-a-longitudinal-case-study-in-sichuan-china
#19
Yang Liu, Bo Zhong, Zi-Song Wu, Song Liang, Dong-Chuan Qiu, Xiao Ma
BACKGROUND: Schistosomiasis remains a major public health concern in China. Since 2004, an integrated strategy was developed to control the transmission of Schistosoma japonicum in China. However, the long-term effectiveness of this integrated strategy for the interruption of schistosomiasis transmission remains unknown in the mountainous and hilly regions of China until now. This longitudinal study aims to evaluate the effectiveness of the integrated strategy on transmission interruption of schistosomiasis in Sichuan Province from 2005 through 2014...
April 7, 2017: Infectious Diseases of Poverty
https://www.readbyqxmd.com/read/28385154/efficacy-of-praziquantel-on-schistosoma-haematobium-and-re-infection-rates-among-school-going-children-in-the-ndumo-area-of-umkhanyakude-district-kwazulu-natal-south-africa
#20
Muhubiri Kabuyaya, Moses John Chimbari, Tawanda Manyangadze, Samson Mukaratirwa
BACKGROUND: Despite its low cure rates and possible resistance, praziquantel (PZQ) is the only drug available for schistosomiasis treatment. Hence, monitoring its efficacy is crucial. This study assessed the efficacy of PZQ, determined re-infection and incidence rates of Schistosoma haematobium infection among school-going children in the Ndumo area, KwaZulu-Natal. METHODS: A cohort of 320 school-going children (10 - 15 years) in 10 primary schools was screened for S...
April 7, 2017: Infectious Diseases of Poverty
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