Tick iron and heme metabolism – New target for an anti-tick intervention

Publication date: Available online 18 January 2016 Source:Ticks and Tick-borne Diseases Author(s): Ondrej Hajdusek, Radek Sima, Jan Perner, Gabriela Loosova, Adela Harcubova, Petr Kopacek Ticks are blood-feeding parasites and vectors of serious human and animal diseases. Ixodes ricinus is a common tick in Europe, transmitting tick-borne encephalitis, Lyme borreliosis, anaplasmosis, or babesiosis. Immunization of hosts with recombinant tick proteins has, in theory, the potential to interfere with tick feeding and block transmission of pathogens from the tick to the host. However, the efficacy of tick antigens has, to date, not been fully sufficient to achieve this. We have focused on 11 in silico identified genes encoding proteins potentially involved in tick iron and heme metabolism. Quantitative real-time PCR (qRT-PCR) expression profiling was carried out to preferentially target proteins that are up-regulated during the blood meal. RNA interference (RNAi) was then used to score the relative importance of these genes in tick physiology. Finally, we performed vaccination screens to test the suitability of these proteins as vaccine candidates. These newly identified tick antigens have the potential to improve the available anti-tick vaccines.
Source: Ticks and Tick borne Diseases - Category: Zoology Source Type: research

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We present the current portfolio of next-generation anti-Wolbachia candidates discovered through phenotypic screening of chemical libraries and validated in a range of in vitro and in vivo filarial infection models. Several novel chemotypes have been identified with selected narrow-spectrum anti-Wolbachia specificity and superior time-to-kill kinetics compared with doxycycline. We discuss the opportunities of developing these novel anti-Wolbachia agents as either cures, adjunct therapies or new preventatives for the treatment of veterinary filariasis.
Source: Veterinary Parasitology - Category: Veterinary Research Source Type: research
Publication date: Available online 16 February 2020Source: Life SciencesAuthor(s): Shima Bastaki, Mahzad Irandoust, Armin Ahmadi, Mohammad Hojjat-Farsangi, Patrick Ambrose, Shahin Hallaj, Mahdi Edalati Fathabad, Ghasem Ghalamfarsa, Gholamreza Azizi, Mehdi Yousefi, Hengameh Chalajour, Farhad Jadidi-NiaraghAbstractAlthough both the incidence and the mortality rate of breast cancer is rising, there is no potent and practical option for the treatment of these patients, particularly in advanced stages. One of the most critical challenges for treatment is the presence of complicated and extensive tumor escape mechanisms in the t...
Source: Life Sciences - Category: Biology Source Type: research
Authors: Graul AI, Pina P, Tracy M, Sorbera L Abstract Highlights of our annual review of new approvals and launches on global drug markets include the approval and launch of Trikafta, the most widely applicable treatment to date for cystic fibrosis; approval of the first Ebola vaccine for general (rather than emergency) use; the pilot rollout in three African countries of the world's first malaria vaccine; approval of a new treatment option for multidrug-resistant bacterial infections; and the approval and launch in China of the first new drug to treat Alzheimer's disease in more than a decade. Several new immune ...
Source: Drugs of Today - Category: Drugs & Pharmacology Tags: Drugs Today (Barc) Source Type: research
Vincent and Rich return to the University of Texas Medical Branch at Galveston to speak with Dennis Bente, Shannan Rossi, Nikos Vasilakis, and Scott Weaver about their work on viruses transmitted by mosquitoes and ticks. Hosts: Vincent Racaniello and Rich Condit Guests: Dennis Bente, Shannan Rossi, Nikos Vasilakis, and Scott Weaver Subscribe (free): iTunes, Google Podcasts, RSS, email Become a patron of TWiV! Links for this episode Measles virus vectored chikungunya vaccine (J Inf Dis) World Reference Center for Emerging Viruses and Arboviruses Insect-specific alphavirus vaccine vect...
Source: This Week in Virology - MP3 Edition - Category: Virology Authors: Source Type: podcasts
Publication date: Available online 15 February 2020Source: Antiviral ResearchAuthor(s): Jan Clement, Clas Ahlm, Tatjana Avšič-Županc, Jason Botten, Kartik Chandran, Colleen B. Jonsson, Hiroaki Kariwa, Jonas Klingström, Boris Klempa, Detlev H. Krüger, Herwig Leirs, Dexin Li, Mifang Liang, Alemka Markotić, Anna Papa, Connie S. Schmaljohn, Nicole D. Tischler, Rainer G. Ulrich, Antti Vaheri, Cecilia VialAbstractThe 2019 11th International Conference on Hantaviruses (ICH 2019) was organized by the International Society for Hantaviruses (ISH), and held on September 1–4, 2019, at the Irish College, in Le...
Source: Antiviral Therapy - Category: Virology Source Type: research
This study also demonstrated a decrease in the frequency and amount of BVDV in PBMCs, harvested from vaccinated calves and exposed to BVDV in vitro. Collectively data from this study highlights the association between an increase in IFN-γ and a decreased infection rate of isolated PBMC’s, based on the frequency and amount of BVDV positive cells following in vitro exposure. This new method combines not only the ability to evaluate cellular responses, but also the ability to understand potential antiviral properties associated with cellular responses. This is the first assay to describe and simultaneously measure...
Source: Veterinary Immunology and Immunopathology - Category: Veterinary Research Source Type: research
Publication date: Available online 15 February 2020Source: Biosensors and BioelectronicsAuthor(s): Hui Chen, Xiaoli Zhang, Zhiyuan Jin, Liping Huang, Hanbing Dan, Wei Xiao, Jiajie Liang, Siyi Zou, Yong TangAbstractA novel time-resolved fluorescence blocking lateral flow immunoassay (TRF-BLFIA) was developed for on-site differential diagnosis of pseudorabies virus (PRV)-infected and vaccinated pigs using europium nanoparticles (EuNPs)-labeled virion antigens and high titer PRV gE monoclonal antibodies (PRV gE-mAb). Upon application of a positive serum sample, the specific epitopes of gE protein on the EuNPs-PRV probe were b...
Source: Biosensors and Bioelectronics - Category: Biotechnology Source Type: research
a Luis Giménez-Lirola Porcine circovirus 3 (PCV3) has been identified as a putative swine pathogen with a subset of infections resulting in stillborn and mummified fetuses, encephalitis and myocarditis in perinatal, and periarteritis in growing pigs. Three PCV3 isolates were isolated from weak-born piglets or elevated stillborn and mummified fetuses. Full-length genome sequences from different passages and isolates (PCV3a1 ISU27734, PCV3a2 ISU58312, PCV3c ISU44806) were determined using metagenomics sequencing. Virus production in cell culture was confirmed by qPCR, IFA, and in situ hybridization. In vivo repl...
Source: Viruses - Category: Virology Authors: Tags: Article Source Type: research
Ticks and the diseases they carry have long been recognized as health concerns, especially in the warmer months when ticks (and humans) are more active. Ticks wait on grass tips or shrubs to latch onto new hosts when they brush by. Most of the hosts are animals, but a few tick species do bite and feed on humans. While doing so, they can transmit bacteria and viruses through their saliva. But here’s what’s changing: Tick species are being found in a wider geographic range. The number of case reports of tick-borne illnesses is increasing. Scientists continue to identify new pathogens (bacteria and viruses that c...
Source: Harvard Health Blog - Category: Consumer Health News Authors: Tags: Health Infectious diseases Prevention Safety Travel health Source Type: blogs
Ticks and the diseases they carry have long been recognized as health concerns, especially in the warmer months when ticks (and humans) are more active. Ticks wait on grass tips or shrubs to latch onto new hosts when they brush by. Most of the hosts are animals, but a few tick species do bite and feed on humans. While doing so, they can transmit bacteria and viruses through their saliva. But here’s what’s changing: Tick species are being found in a wider geographic range. The number of case reports of tick-borne illnesses is increasing. Scientists continue to identify new pathogens (bacteria and viruses that c...
Source: Harvard Health Blog - Category: Consumer Health News Authors: Tags: Health Infectious diseases Prevention Safety Travel health Source Type: blogs
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