[Seapv] Fwd: [RIEC] RV: Call for a PhD candidate - INVITATION TO JOIN A RESEARCH PROJECT
Lluís Luján
Lluis.Lujan en unizar.es
Jue Abr 9 21:06:07 CEST 2020
FYI
-------- Missatge Original --------
Assumpte: [RIEC] RV: Call for a PhD candidate - INVITATION TO JOIN A
RESEARCH PROJECT
Data: 2020-04-09 13:11
Remitent: Christian Gortázar Schmidt <Christian.Gortazar en UCLM.ES>
Destinatari: RIEC en LISTSERV.REDIRIS.ES
Respon a: Investigación sobre sanidad de fauna silvestre y enfermedades
compartidas <RIEC en LISTSERV.REDIRIS.ES>
De: CIBIO-InBIO Divulgação <divulgacao en cibio.up.pt>
Enviado el: jueves, 9 de abril de 2020 13:03
Para: CIBIO-InBIO Divulgação <divulgacao en cibio.up.pt>
Asunto: Call for a PhD candidate - INVITATION TO JOIN A RESEARCH PROJECT
Dear Colleagues,
Please find below the advert for a PhD student position in the field of
virology and co-evolution at CIBIO-InBIO and University of Arizona.
All the best,
CIBIO-InBIO – Gabinete de Comunicação e Divulgação Científica
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INVITATION TO JOIN A RESEARCH PROJECT
Call for a PhD candidate
We are looking for a highly motivated graduate student, who is
interested in pursuing a PhD degree in the field of virology and
co-evolution, studying myxoma virus infection in leporids. This work is
in a scope of an ongoing collaboration between CIBIO-InBIO and
University of Arizona (LMU), United States of America, to study myxoma
virus infection. The project involves molecular biology techniques and
computational analyses.
The student will interact with an international team of scientists at
CIBIO-InBIO in the Vairão Campus, Portugal, and the University of
Arizona, USA, under the supervision of
Pedro<https://cibio.up.pt/people/details/clpinho> Esteves (CIBIO-InBIO)
and Grant McFadden
<https://www.cefe.cnrs.fr/en/research/evolutionary-ecology/genetique-et-ecologie-evolutive-3/800-french/recherche/ee/gee/c/195-pierre-andre-crochet>
(University of Arizona).
The application should include the following information:
· Motivation letter with a short biography and research
interests;
· Curriculum vitae summarizing education, experience, other
qualifying activity and a list of publications;
· Copy of master degree and course grades;
· Names and contact information of two referees.
The application must be written in English and sent by e-mail to
pjesteves en cibio.up.pt<mailto: pjesteves en cibio.up.pt> until April 18,
2019.
Brief Project Description
Myxoma virus (MYXV) is naturally found in American leporid species
(Sylvilagus brasiliensis and S. bachmani), where it causes only a benign
cutaneous fibroma. However, in the European rabbit (Oryctolagus
cuniculus) it causes myxomatosis, a lethal disseminated disease. The
co-evolution between European rabbit populations and MYXV is a textbook
example. In 2019, we described for the first time a MYXV (MYXV-Tol) that
was able to cross the barrier species and cause myxomatosis in a Lepus
species. In this proposal, we aim to investigate the biological
underpinnings behind this recent cross-species leap of MYXV-Tol from
rabbits to hares. This poxvirus model system will use in vitro
approaches to determine the mechanisms that MYXV-Tol play in evading the
host immune system and induce a systemic infection, as well as evaluate
the co-evolution between MYXV-Tol and the Iberian hare populations in
real time. Further, this study will provide valuable information for
more broadly understanding zoonotic viral spillover of other poxviruses,
such as the host species jump of monkeypox virus or tanapox virus into
humans.
Summary
Uncovering the mechanisms enabling the cross-species jumps of viruses is
a critical need. Myxoma virus (MYXV) is found naturally in Sylvilagus
species, and, until recently, it was only known to cause the lethal
disease myxomatosis in the European rabbit (Oryctolagus cuniculus). In
2018, Iberian hares (Lepus granatensis) from the Toledo province of
Spain were found dead with lesions consistent with those observed in
myxomatosis, suggesting a cross-species jump of MYXV. To investigate the
possibility of a new MYXV cross-species transmission, samples collected
from deceased symptomatic Iberian hares were analyzed. From these, we
isolated and sequenced a new MYXV variant which we refer to as MYXV
Toledo (MYXV-Tol). The MYXV-Tol genome includes three newly disrupted
genes (M009L, M152R and M036L) and a novel four gene “cassette”
insertion of ~ 2,800 bp within the M009L gene. This insertion was
clearly derived from another poxvirus but from an undescribed source
that in terms of gene order resembles members from the ungulate poxvirus
family. Interestingly, the novel recombinant insert includes an
orthologue of a poxvirus host range gene, which is homologous to the
MYXV M064R C7L-host range factor. Therefore, we hypothesized that this
newly acquired viral protein has enabled MYXV to alter its host range
from rabbits to hares and enabled the myxomatosis-like pathogenesis in
hares. To study the importance of this protein in infection, we
generated recombinant viruses including a ΔM064Tol (knockout) virus
(vMyxTol-ΔM064Tol-GFP-tdT). When the hare cell line HN-R was infected
with this vMyxTol-ΔM064Tol-GFP-tdT or wild-type MYXV-Lau, they were both
unable to detectably infect or replicate within HN-R hare cells, while
MYXV-Tol virus showed productive infection and replication in both
rabbit and hare cells. This result shows that M064Tol is the key
obligatory protein allowing MYXV-Tol replication in hare cells by
acquiring new host range functions. In this application, we propose to
investigate the biological actions of M064Tol host range protein that
allowed cross-species jump of MYXV-Tol from rabbits to hares, as well as
study the evolution of this virus in the Iberian hare populations in
real time.
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