• 한국미생물학회:학술대회논문집
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• 한국미생물학회 2002년도 추계학술대회
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• pp.118-120
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• 2002

Genetic materials including DNA plasmid are effective delivery vehicle to express interesting gene efficiently and safely not to generate replication competent virus. Moreover, it has advantages to design a better vector and to simplify manufacturing and storage condition. To understand a possible pathogenic mechanism by a flavivirus, West Nile virus (WNV), WNV genome sequence was aligned to other pathogenic viral genome. Interestingly, WNV capsid (Cp) amino acid sequence has some homology to HIV-l Vpr protein. These proteins induce apoptosis in human cell lines as well as in vivo and cell cycle arrest. Therefore, DNA plasmid carrying apoptosis-inducing and cell cycle arresting viral proteins including a HIV-1 Vpr and a WNV Cp protein can be useful for anti-cancer therapeutic applications. This WNV Cp protein is an early expressed protein which can be a reasonable target antigen (Ag) for vaccine design. Immunization of a DNA construct encoding WNV Cp protein induces a strong Ag-specific humoral and Th1-type immune responses in animal. Therefore, DNA plasmid encoding apoptotic viral proteins can be useful tool for therapeutic and prophylactic applications.

• 시큐리티연구
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• 제52호
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• pp.145-162
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• 2017

2015년 대한민국은 중동호흡기증후군(Middle East respiratory syndrome coronavirus; MERS; 메르스) 유행으로 큰 사회적 문제를 겪었다. 한국 정부는 그 대처 과정에서 한국정부의 재난대응체제의 문제점을 드러내며 많은 비판을 받은 바 있다. 국가위기관리와 감염병 대응체계와 관련하여 이와 비근한 외국의 사례로 1999년부터 시작된 미국의 웨스트 나일 바이러스(West Nile Virus; WNV) 사태가 있다. 이때 미 오리건(Oregon) 주(州)는 주정부와 지방 정부 및 관련 기관들 간의 긴밀한 협업을 통해 효과적으로 WNV 사태에 대처하여 위기관리의 모범적인 사례로 간주되고 있다. 이 논문에서는 한국의 메르스 사태와 미국 오리건 주의 웨스트 나일 바이러스 사태의 사례들을 정리 비교하여 정부간 조직간 협업과 정보공유를 중심으로 국가위기 관리 및 감염병 대응체계에 대한 함의점을 찾고자 하였다. 사례비교의 결과 컨트롤 타워의 역할, 정보공유 및 공개의 중요성, 기존 시스템과 사회 네트워크의 활용, 지속가능한 정부간 협업이라는 네 가지 함의점을 도출할 수 있었다.

• Journal of Veterinary Science
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• 제22권3호
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• pp.29.1-29.6
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• 2021

West Nile virus (WNV), a neurotropic arbovirus, has been detected in mosquitos, birds, wildlife, horses, and humans in Malaysia, but limited information is available on WNV infection in Malaysian pigs. We tested 80 archived swine serum samples for the presence of WNV antibody and West Nile (WN) viral RNA using ID Screen West Nile Competition Multi-species enzyme-linked immunosorbent assay kits and WNV-specific primers in reverse transcription polymerase chain reaction assays, respectively. A WNV seroprevalence of 62.5% (50/80) at 95% confidence interval (51.6%-72.3%) was recorded, with a significantly higher seroprevalence among young pigs (weaner and grower) and pigs from south Malaysia. One sample was positive for Japanese encephalitis virus antibodies; WN viral RNA was not detected in any of the serum samples.

• IMMUNE NETWORK
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• 제7권2호
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• pp.66-74
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• 2007

Background: The genus Flavivirus consists of many emerging arboviruses, including Dengue virus (DV), Japanese encephalitis virus (JEV) and West Nile virus (WNV). Effective preventive vaccines remain elusive for these diseases. Mice are being increasingly used as the animal model for vaccine studies. However, the pathogenic mechanisms of these viruses are not clearly understood. Here, we investigated the interaction of DV and JEV with murine bone marrow-derived dendritic cells (bmDC). Methods: ELISA and FACS analysis were employed to investigate cytokine production and phenotypic changes of DCs obtained from bone marrow following flavivirus infection. Results: We observed that these viruses altered the cytokine profile and phenotypic markers. Although both viruses belong to the same family, JEV-infected bmDC produced anti-inflammatory cytokine (IL-10) along with pro-inflammatory cytokines, whereas DV infection induced production of large amounts of pro-inflammatory cytokines (IL-6 and TNF-${\alpha}$) and no IL-10 from murine bmDCs. Both flaviviruses also up-regulated the expression of co-stimulatory molecules such as CD40, CD80 and CD86. JEV infection led to down-regulation of MHC II expression on infected bmDCs. We also found that cytokine production induced by JEV and DV is MyD88-dependent. This dependence was complete for DV, as cytokine production was completely abolished in the absence of MyD88. With regard to JEV, the absence of MyD88 led to a partial reduction in cytokine levels. Conclusion: Here, we demonstrate that MyD88 plays an important role in the pathogenesis of flaviviruses. Our study provides insight into the pathogenesis of JEV and DV in the murine model.