Abstract
A constraint on understanding the pathogenesis of malignant catarrhal fever (MCF) is the limited number of tools to localize infected cells. The amount of detectable virus, visualized in the past either by immunohistochemistry or in situ hybridization (ISH), has been modest in fixed or frozen tissues. This complicates our understanding of the widespread lymphoid proliferation, epithelial necrosis/apoptosis, and arteritis-phlebitis that characterize MCF. In this work, we developed a probe-based in situ hybridization assay targeting 2 ovine herpesvirus 2 (OvHV-2) genes, as well as their respective transcripts, in formalin-fixed tissues. Using this approach, OvHV-2 nucleic acids were detected in lymphocytes in MCF-affected animals following both natural infection (American bison and domestic cattle) and experimental infection (American bison, rabbits, and pigs). The probe did not cross-react with 4 closely related gammaherpesviruses that also cause MCF: alcelaphine herpesvirus 1, alcelaphine herpesvirus 2, caprine herpesvirus 2, and ibex–MCF virus (MCFV). No signal was detected in control tissues negative for OvHV-2. ISH will be of value in analyzing the natural progression of OvHV-2 infection in time-course studies following experimental infection and in addressing the pathogenesis of MCF.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 78-86 |
| Number of pages | 9 |
| Journal | Veterinary Pathology |
| Volume | 56 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 1 2019 |
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Keywords
- gammaherpesvirus
- in situ hybridization
- malignant catarrhal fever
- OvHV-2
- ovine
- quantitative polymerase chain reaction
- vasculitis
- veterinary pathology
ASJC Scopus subject areas
- veterinary(all)
Cite this
In Situ Hybridization for Localization of Ovine Herpesvirus 2, the Agent of Sheep-Associated Malignant Catarrhal Fever, in Formalin-Fixed Tissues. / Pesavento, Patricia; Cunha, Cristina W.; Li, Hong; Jackson, Kenneth; O’Toole, Donal.
In: Veterinary Pathology, Vol. 56, No. 1, 01.01.2019, p. 78-86.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - In Situ Hybridization for Localization of Ovine Herpesvirus 2, the Agent of Sheep-Associated Malignant Catarrhal Fever, in Formalin-Fixed Tissues
AU - Pesavento, Patricia
AU - Cunha, Cristina W.
AU - Li, Hong
AU - Jackson, Kenneth
AU - O’Toole, Donal
PY - 2019/1/1
Y1 - 2019/1/1
N2 - A constraint on understanding the pathogenesis of malignant catarrhal fever (MCF) is the limited number of tools to localize infected cells. The amount of detectable virus, visualized in the past either by immunohistochemistry or in situ hybridization (ISH), has been modest in fixed or frozen tissues. This complicates our understanding of the widespread lymphoid proliferation, epithelial necrosis/apoptosis, and arteritis-phlebitis that characterize MCF. In this work, we developed a probe-based in situ hybridization assay targeting 2 ovine herpesvirus 2 (OvHV-2) genes, as well as their respective transcripts, in formalin-fixed tissues. Using this approach, OvHV-2 nucleic acids were detected in lymphocytes in MCF-affected animals following both natural infection (American bison and domestic cattle) and experimental infection (American bison, rabbits, and pigs). The probe did not cross-react with 4 closely related gammaherpesviruses that also cause MCF: alcelaphine herpesvirus 1, alcelaphine herpesvirus 2, caprine herpesvirus 2, and ibex–MCF virus (MCFV). No signal was detected in control tissues negative for OvHV-2. ISH will be of value in analyzing the natural progression of OvHV-2 infection in time-course studies following experimental infection and in addressing the pathogenesis of MCF.
AB - A constraint on understanding the pathogenesis of malignant catarrhal fever (MCF) is the limited number of tools to localize infected cells. The amount of detectable virus, visualized in the past either by immunohistochemistry or in situ hybridization (ISH), has been modest in fixed or frozen tissues. This complicates our understanding of the widespread lymphoid proliferation, epithelial necrosis/apoptosis, and arteritis-phlebitis that characterize MCF. In this work, we developed a probe-based in situ hybridization assay targeting 2 ovine herpesvirus 2 (OvHV-2) genes, as well as their respective transcripts, in formalin-fixed tissues. Using this approach, OvHV-2 nucleic acids were detected in lymphocytes in MCF-affected animals following both natural infection (American bison and domestic cattle) and experimental infection (American bison, rabbits, and pigs). The probe did not cross-react with 4 closely related gammaherpesviruses that also cause MCF: alcelaphine herpesvirus 1, alcelaphine herpesvirus 2, caprine herpesvirus 2, and ibex–MCF virus (MCFV). No signal was detected in control tissues negative for OvHV-2. ISH will be of value in analyzing the natural progression of OvHV-2 infection in time-course studies following experimental infection and in addressing the pathogenesis of MCF.
KW - gammaherpesvirus
KW - in situ hybridization
KW - malignant catarrhal fever
KW - OvHV-2
KW - ovine
KW - quantitative polymerase chain reaction
KW - vasculitis
KW - veterinary pathology
UR - http://www.scopus.com/inward/record.url?scp=85056703434&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85056703434&partnerID=8YFLogxK
U2 - 10.1177/0300985818798085
DO - 10.1177/0300985818798085
M3 - Article
VL - 56
SP - 78
EP - 86
JO - Veterinary Pathology
JF - Veterinary Pathology
SN - 0300-9858
IS - 1
ER -