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Toxoplasma gondii

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https://www.readbyqxmd.com/read/29777337/molecular-epidemiology-of-parasitic-protozoa-and-ehrlichia-canis-in-wildlife-in-madrid-central-spain
#1
Angel Criado-Fornelio, T Martín-Pérez, C Verdú-Expósito, S A Reinoso-Ortiz, J Pérez-Serrano
Wildlife species are involved in the transmission of diverse pathogens. This study aimed to monitor raccoons (Procyon lotor), American minks (Neovison vison), and red foxes (Vulpes vulpes) as potential reservoirs in central Spain. Specifically, 200 spleen and fecal samples (from 194 raccoons, 3 minks, and 3 foxes) were analyzed molecularly by PCR/qPCR and sequencing for the presence of piroplasmids, Hepatozoon spp., Toxoplasma gondii, and Ehrlichia canis infections in the Community of Madrid (Spain). Biological samples were obtained in the years 2014, 2015, and 2016...
May 18, 2018: Parasitology Research
https://www.readbyqxmd.com/read/29776388/contributions-of-hla-haplotypes-il8-level-and-toxoplasma-gondii-infection-in-defining-celiac-disease-s-phenotypes
#2
Mohammad Rostami-Nejad, Seyed Hossein Hejazi, Amado Salvador Peña, Hamid Asadzadeh-Aghdaei, Kamran Rostami, Umberto Volta, Mohammad Reza Zali
BACKGROUND: It is not clear why some patients with coeliac disease (CD) present with severe symptoms and small intestinal mucosal damages while others present with milder symptoms and no frank enteropathy. There is no study to assess the associated factors with mild/severe symptoms and enteropathy. The terminologies like latent, silent and potential are difficult to use and are unrepresentative. In the present study we describe coeliac disease's phenotypes based on HLA haplotypes, IL8 production and past infection with Toxoplasma gondii (T...
May 18, 2018: BMC Gastroenterology
https://www.readbyqxmd.com/read/29776374/the-toxoplasma-gondii-me-49-strain-upregulates-levels-of-a20-that-inhibit-nf-%C3%AE%C2%BAb-activation-and-promotes-apoptosis-in-human-leukaemia-t-cell-lines
#3
Qian Chen, Min-Hui Pang, Xiao-Hong Ye, Guang Yang, Chen Lin
BACKGROUND: Acute T-lymphocyte leukaemia is a form of haematological malignancy with abnormal activation of NF-κB pathway, which results in high expression of A20 and ABIN1, which constitute a negative feedback mechanism for the regulation of NF-κB activation. Clinical studies have found that acute T-lymphocyte leukaemia patients are susceptible to Toxoplasma gondii infection; however, the effect of T. gondii on the proliferation and apoptosis of human leukaemia T-cells remains unclear...
May 18, 2018: Parasites & Vectors
https://www.readbyqxmd.com/read/29775826/atypical-virulence-in-a-type-iii-toxoplasma-gondii-strain-isolated-in-japan
#4
Yuji Taniguchi, Cornelia Appiah-Kwarteng, Mami Murakami, Junpei Fukumoto, Kisaburo Nagamune, Tomohide Matsuo, Tatsunori Masatani, Hirotaka Kanuka, Tokio Hoshina, Katsuya Kitoh, Yasuhiro Takashima
The virulence of a type III Toxoplasma gondii strain isolated in Japan and designated here as TgCatJpGi1/TaJ was examined in mice and micro minipigs in this study. Despite its type III genotype, oral or intraperitoneal inoculation of cysts from it resulted in severe virulence in C57BL/6J and BALB/c mice. In contrast, mice inoculated with a high dose of TgCatJpGi1/TaJ tachyzoites showed no obvious clinical signs of infection, and all of them survived for >21 days post-inoculation. Furthermore, no clinical signs of infection were seen when micro minipigs were inoculated with 900 cysts...
May 15, 2018: Parasitology International
https://www.readbyqxmd.com/read/29773643/the-transcription-factor-bhlhe40-is-a-switch-of-inflammatory-versus-antiinflammatory-th1-cell-fate-determination
#5
Fang Yu, Suveena Sharma, Dragana Jankovic, Rama Krishna Gurram, Pan Su, Gangqing Hu, Rao Li, Sadiye Rieder, Keji Zhao, Bing Sun, Jinfang Zhu
Type 1 T helper (Th1) cells play a critical role in host defense against intracellular pathogens and in autoimmune diseases by producing a key inflammatory cytokine interferon (IFN)-γ; some Th1 cells can also be antiinflammatory through producing IL-10. However, the molecular switch for regulating the differentiation of inflammatory and antiinflammatory Th1 cells is still elusive. Here, we show that Bhlhe40 -deficient CD4 Th1 cells produced less IFN-γ but substantially more IL-10 than wild-type Th1 cells both in vitro and in vivo...
May 17, 2018: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/29773137/microsatellite-pattern-analysis-of-neospora-caninum-from-a-naturally-infected-goat-fetus
#6
Lucía María Campero, María Laura Gos, Dadin Prando Moore, Javier Regidor-Cerrillo, Juan Manuel Unzaga, Gastón Moré, Luis Miguel Ortega-Mora, María Cecilia Venturini
Neospora caninum is an apicomplexan protozoan responsible for abortion in ruminants. The present study aimed to diagnose an abortion from an Anglo Nubian goat from a dairy herd located in Buenos Aires province, Argentina. The goat delivered a fetus of approximately 3 months gestation that was studied by indirect fluorescent antibody test (IFAT), Immunoblot (IB), histopathology (HP), immunohistochemistry (IHC), and molecular assays (PCR, sequencing and microsatellite genotyping). Interferon gamma knock-out mice were inoculated with a pool of tissues for isolation attempts...
May 15, 2018: Veterinary Parasitology
https://www.readbyqxmd.com/read/29773099/-toxoplasma-gondii-rop38-promotes-the-maturation-of-dendritic-cells-mediated-by-tlr4
#7
Heng Zhang, Shanghua Wu, Zhiqiang Shi, Shan Wang, Wei Lu, Yizhen Wu, Pei Sun, Qianming Xu
Objective To investigate the effect of rhoptry protein 38 (ROP38) from Toxoplasma gondii (T. gondii) on the maturation of dendritic cells (DCs) by Toll-like receptor 4 (TLR4) induction in vitro. Methods The total RNA from T. gondii RH strain was extracted by guanidine thiocyanate method, and then cDNA was synthesized with reverse transcription reaction. After ROP38 gene was amplified by PCR, the recombinant pGEX-4T-ROP38 was constructed and expressed under IPTG induction. The recombinant ROP38 protein was detected by SDS-PAGE and Western blot analysis...
March 2018: Xi Bao Yu Fen Zi Mian Yi Xue za Zhi, Chinese Journal of Cellular and Molecular Immunology
https://www.readbyqxmd.com/read/29770662/-construction-and-expression-of-multi-gene-recombinant-plasmid-peg-fp-n1-hbsag-rop2
#8
Ma Rong, Xiao Ting, Li Jin, Sun Hui, Xu Chao, Huang Bing-Cheng, Yin Kun, Zhao Gui-Hua, Cui Yong, Zhu Song, Liu Gong-Zhen, Yan Ge, Wei Qing-Kuan
OBJECTIVE: To construct pEGFP-N1-HBsAg-ROP2 recombinant expression plasmid and transfect HEK293T cells for expression, and pay a way for Toxoplasma gondii nucleic acid vaccine development. METHODS: According to the HBsAg gene sequence and pcDNA3-p30-ROP2 recombinant plasmid restriction sites, the HBsAg gene was amplified by PCR. The HBsAg gene was cloned into the pcDNA3-p30-ROP2 and instead of p30 gene. The HBsAg-ROP2 fragment was amplified by PCR and digested with Hind Ⅲ and Kpn Ⅰ to clone into the pEGFP-N1 eukaryotic expression vector and construct the recombinant pEGFP-N1-HBsAg-ROP2...
March 14, 2018: Zhongguo Xue Xi Chong Bing Fang Zhi za Zhi, Chinese Journal of Schistosomiasis Control
https://www.readbyqxmd.com/read/29769499/toxoplasma-gondii-seropositivity-and-its-possible-associated-risk-factors-among-pregnant-women-attending-antenatal-clinic-in-a-tertiary-care-hospital-of-dhaka-bangladesh
#9
C R Naheen, S Tarafder, S Khan
Toxoplasmosis is a well-documented cause of bad obstetric history (BOH) and a major reason of congenitally acquired infection. This observational study was conducted to detect the rate of seropositivity of toxoplasmosis in pregnant women and observe their risk factors associated with disease transmission attending the antenatal clinic of the Bangabandhu Sheikh Mujib Medical University, Dhaka, Bangladesh from July 2015 to August 2016. The study subjects included 150 pregnant women of different gestational ages...
April 2018: Mymensingh Medical Journal: MMJ
https://www.readbyqxmd.com/read/29765310/economic-holobiont-influence-of-parasites-microbiota-and-chemosignals-on-economic-behavior
#10
Petr Houdek
The article is a perspective on utilization of microorganisms and chemosignals in studying human economic behavior. Research in biological roots of economic development has already confirmed that parasitic pressure influenced the creation and development of cultural norms and institutions. However, other effects of microorganisms on human groups and individual decision-making and behavior are heavily understudied. The perspective discusses how parasitic infections, sexually transmitted organisms and microbiota (i...
2018: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/29762364/seroprevalence-of-toxoplasma-gondii-infection-among-%C3%AE-thalassemia-major-pediatric-population-implications-for-transfusion-transmissible-toxoplasmosis
#11
Nora El-Tantawy, Ahmad Darwish, Eman Eissa
BACKGROUND: Children with β-thalassemia major who regularly receive blood transfusion are at risk of developing transfusion-transmitted infection. Toxoplasmosis is a common and a serious parasitic disease with high prevalence and could be transmitted through blood transfusion from healthy asymptomatic donors. However, screening Toxoplasma gondii before blood donation has not been considered. OBJECTIVE: To determine the prevalence of T. gondii antibodies among thalassemia children undergoing blood transfusion...
May 14, 2018: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/29757702/genetic-diversity-of-toxoplasma-gondii-isolates-from-free-range-chickens-in-bahia-brazil
#12
Daniele Santana Rocha, Mariana Guimarães Nilsson, Bianca Mendes Maciel, Hilda Fátima de Jesus Pena, Bruna Farias Alves, Aristeu Vieira Silva, Luís Fernando Pita Gondim, George Rego Albuquerque
In the present work, genotyping of 25 isolates of Toxoplasma gondii from free-range chickens in the State of Bahia was performed by means of polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) technique using eleven genetic markers (SAG1, 5'+3'SAG2, alt.SAG2, SAG3, BTUB, GRA6, c22-8, c29-2, L358, PK1, Apico and CS3). The analysis revealed eight genotypes, three of which had never been previously reported. Four genotypes were represented by single isolates, while the others by two or more isolates...
May 15, 2018: Journal of Parasitology
https://www.readbyqxmd.com/read/29750191/structures-of-monomeric-and-oligomeric-forms-of-the-toxoplasma-gondii-perforin-like-protein-1
#13
Tao Ni, Sophie I Williams, Saša Rezelj, Gregor Anderluh, Karl Harlos, Phillip J Stansfeld, Robert J C Gilbert
Toxoplasma and Plasmodium are the parasitic agents of toxoplasmosis and malaria, respectively, and use perforin-like proteins (PLPs) to invade host organisms and complete their life cycles. The Toxoplasma gondii PLP1 ( Tg PLP1) is required for efficient exit from parasitophorous vacuoles in which proliferation occurs. We report structures of the membrane attack complex/perforin (MACPF) and Apicomplexan PLP C-terminal β-pleated sheet (APCβ) domains of Tg PLP1. The MACPF domain forms hexameric assemblies, with ring and helix geometries, and the APCβ domain has a novel β-prism fold joined to the MACPF domain by a short linker...
March 2018: Science Advances
https://www.readbyqxmd.com/read/29748713/occurrence-of-selected-zoonotic-food-borne-parasites-and-first-molecular-identification-of-alaria-alata-in-wild-boars-sus-scrofa-in-italy
#14
Alessia Libera Gazzonis, Luca Villa, Katharina Riehn, Ahmad Hamedy, Stefano Minazzi, Emanuela Olivieri, Sergio Aurelio Zanzani, Maria Teresa Manfredi
Wild boar is a source of human infections with zoonotic pathogens, including food-borne parasites. With the aim of a characterization of the human exposure risk, a survey on wild boars intended for human consumption was planned, selecting three pathogens, Toxoplasma gondii, Alaria alata, and Trichinella spp., as markers of meat infection. Diaphragm muscle samples from 100 wild boars hunted in Piedmont region (Northern Italy) in two hunting seasons (2015-2016) were collected. Concerning T. gondii, a combined approach of antibody detection and molecular techniques with genotyping was performed...
May 11, 2018: Parasitology Research
https://www.readbyqxmd.com/read/29748456/a-systematic-review-and-meta-analysis-of-the-prevalence-of-toxoplasmosis-in-hemodialysis-patients-in-iran
#15
Masoud Foroutan, Ali Rostami, Hamidreza Majidiani, Seyed Mohammad Riahi, Sasan Khazaei, Milad Badri, Elham Yousefi
Objectives: Toxoplasmosis is a worldwide distributed parasitic disease with wide range of complications in immunocompromised patients. This systematic review and meta-analysis study was performed to evaluate the seroprevalence of Toxoplasma gondii (T. gondii) among patients undergoing hemodialysis patients in Iran. Methods: We searched the English and Persian databases for studies reporting T. gondii seroprevalence in Iranian hemodialysis patients up to 31 December 2017...
April 23, 2018: Epidemiology and Health
https://www.readbyqxmd.com/read/29747388/evaluation-of-anti-toxoplasma-gondii-effect-of-ursolic-acid-as-a-novel-toxoplasmosis-inhibitor
#16
Won Hyung Choi, In Ah Lee
This study was carried out to evaluate the anti-parasitic effect of ursolic acid against Toxoplasma gondii ( T. gondii ) that induces toxoplasmosis, particularly in humans. The anti-parasitic effects of ursolic acid against T. gondii -infected cells and T. gondii were evaluated through different specific assays, including immunofluorescence staining and animal testing. Ursolic acid effectively inhibited the proliferation of T. gondii when compared with sulfadiazine, and consistently induced anti- T. gondii activity/effect...
May 9, 2018: Pharmaceuticals
https://www.readbyqxmd.com/read/29742869/serologic-tests-of-igg-and-igm-antibodies-and-igg-avidity-for-diagnosis-of-ocular-toxoplasmosis
#17
Bahman Rahimi-Esboei, Mohammad Zarei, Mehdi Mohebali, Hossein Keshavarz Valian, Saeedeh Shojaee, Raziyeh Mahmoudzadeh, Mirataollah Salabati
This prospective study was aimed to detect acute and chronic ocular toxoplasmosis by comparison of anti- Toxoplasma gondii IgM and IgG antibody levels and IgG avidity test. One hundred and seventeen patients with ocular toxoplasmosis (OT) who referred to the Farabi Eye Hospital, Tehran, Iran were included in this study. Of the patients, 77 cases were positive for anti- T. gondii IgG, and 8 cases were positive for anti- T. gondii IgM. IgG avidity test revealed 11, 4, and 102 cases were low, intermediate, and high, respectively, and 6...
April 2018: Korean Journal of Parasitology
https://www.readbyqxmd.com/read/29742868/modulated-gene-expression-of-toxoplasma-gondii-infected-retinal-pigment-epithelial-cell-line-arpe-19-via-pi3k-akt-or-mtor-signal-pathway
#18
Wei Zhou, Juan-Hua Quan, Fei-Fei Gao, Hassan Ahmed Hassan Ahmed Ismail, Young-Ha Lee, Guang-Ho Cha
Due to the critical location and physiological activities of the retinal pigment epithelial (RPE) cell, it is constantly subjected to contact with various infectious agents and inflammatory mediators. However, little is known about the signaling events in RPE involved in Toxoplasma gondii infection and development. The aim of the study is to screen the host mRNA transcriptional change of 3 inflammation-related gene categories, PI3K/Akt pathway regulatory components, blood vessel development factors and ROS regulators, to prove that PI3K/Akt or mTOR signaling pathway play an essential role in regulating the selected inflammation-related genes...
April 2018: Korean Journal of Parasitology
https://www.readbyqxmd.com/read/29741393/molecular-docking-of-immunogenic-peptide-of-toxoplasma-gondii-and-encapsulation-with-polymer-as-vaccine-candidate
#19
Rabia Cakir-Koc, Yasemin Budama-Kilinc, Yagmur Kokcu, Serda Kecel-Gunduz
Toxoplasma gondii is one of the most widely spread parasitic organisms in the world. T. gondii causes primary, chronic infection and mortality. Major surface antigen 1 is the most abundant tachyzoite surface protein and highly conserved between species and causes strong humoural response. Some studies showed that the peptide sequence of surface antigen has immunity. Therefore, tachyzoite surface antigenic peptide sequence is one of the good candidates for vaccine development. However, conformational information and delivery systems are very important parameters for vaccine development...
May 9, 2018: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/29738095/toxoplasma-gondii-tfp1-is-an-essential-transporter-family-protein-critical-for-microneme-maturation-and-exocytosis
#20
Pierre-Mehdi Hammoudi, Bohumil Maco, Sunil Kumar Dogga, Karine Frénal, Dominique Soldati-Favre
Invasion and egress are two key steps in the lytic cycle of Apicomplexa that are governed by the sequential discharge of proteins from two apical secretory organelles called micronemes and rhoptries. In Toxoplasma gondii, the biogenesis of these specialized organelles depends on the post Golgi trafficking machinery, forming an endosomal-like compartment (ELC) resembling endomembrane systems found in eukaryotes. In this study, we have characterized four phylogenetically related Transporter Facilitator Proteins (TFPs) conserved among the apicomplexans...
May 8, 2018: Molecular Microbiology
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