Up to 170 tick-borne viruses (TBVs) have been identified to date. However, there is a paucity of information regarding TBVs and their interaction with respective vectors, limiting the development of new effective and urgently needed control methods. To overcome this gap of knowledge, it is essential to reproduce transmission cycles under controlled laboratory conditions. In this study we assessed an artificial feeding system (AFS) and an immersion technique (IT) to infect Ixodes ricinus ticks with tick-borne encephalitis (TBE) and Kemerovo (KEM) virus, both known to be transmitted predominantly by ixodid ticks. Both methods permitted TBEV acquisition by ticks and we further confirmed virus trans-stadial transmission and onward transmission to a vertebrate host. However, only artificial feeding system allowed to demonstrate both acquisition by ticks and trans-stadial transmission for KEMV. Yet we did not observe transmission of KEMV to mice (IFNAR-/- or BALB/c). Artificial infection methods of ticks are important tools to study tick-virus interactions. When optimally used under laboratory settings, they provide important insights into tick-borne virus transmission cycles.

• MeSH
• arachnida jako vektory fyziologie   virologie   MeSH
• interakce hostitele a patogenu MeSH
• klíště fyziologie   virologie   MeSH
• klíšťová encefalitida přenos   virologie   MeSH
• lidé MeSH
• myši inbrední BALB C MeSH
• myši MeSH
• Orbivirus fyziologie   MeSH
• reovirové infekce přenos   virologie   MeSH
• virologie metody   MeSH
• viry klíšťové encefalitidy fyziologie   MeSH
• zvířata MeSH
• Check Tag
• lidé MeSH
• myši MeSH
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH
• hodnotící studie MeSH
• práce podpořená grantem MeSH

Oncolytic viruses infect, replicate in, and lyse tumour cells but spare the normal ones. One of oncolytic viruses is a naturally occurring replication-competent reovirus (RV), which preferentially kills tumour cells with activated Ras signaling pathways. The aim of this study was to survey effects of RV on brain tumour-derived cells in vitro under hypoxic conditions since hypoxia causes resistance to radio- and chemotherapy. This study demonstrates that RV replicates preferentially in tumour cells and that the virus is able to overcome cellular adaptation to hypoxia and infect and kill hypoxic tumour cells. RV can both replicate in hypoxic tumour microenvironment and cause the cytopathic effect, subsequently inducing cell death. We found that a large proportion of cells are killed in hypoxia (1% O₂) by caspase-independent mechanisms. Furthermore, we learned that the cell death induced by RV in hypoxic conditions is not caused by autophagy.

• MeSH
• apoptóza účinky léků   MeSH
• autofagie účinky léků   MeSH
• faktor 1 indukovatelný hypoxií - podjednotka alfa metabolismus   MeSH
• fibroblasty účinky léků   patologie   virologie   MeSH
• hypoxie buňky účinky léků   MeSH
• kaspasa 3 metabolismus   MeSH
• kyslík farmakologie   MeSH
• lidé MeSH
• myši MeSH
• nádorové buněčné linie MeSH
• onkolytická viroterapie * MeSH
• onkolytické viry účinky léků   fyziologie   MeSH
• Reoviridae účinky léků   fyziologie   MeSH
• reovirové infekce patologie   virologie   MeSH
• zvířata MeSH
• Check Tag
• lidé MeSH
• mužské pohlaví MeSH
• myši MeSH
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH