4 0 0 0 OA 養殖現場を視野に入れた魚類ウイルスRNAワクチンの実用化
本研究で実用化を目指した「ds-RNA型」ワクチンは,申請者らが開発してきた「mRNA型」ワクチンを発展させたものであり,ds-RNA接種により産生されるインターフェロンを利用した簡便かつ実用的な魚類ウイルスに対する免疫方法である。Poly(I:C)をニジマス,マハタ,ヒラメに投与し,魚を一過性の抗ウイルス状態とし,それぞれ伝染性造血器壊死症,ウイルス性神経壊死症,ウイルス性出血性敗血症原因ウイルスで攻撃して生存率を対照と比較した。3例共にワクチン効果が確認でき,この間に養殖環境中に存在する病原ウイルスに暴露させることでウイルスに対する特異免疫を誘導することもできた。さらに実用化に向け,魚毒性の心配がない用法・容量を定めることができた。
1 0 0 0 IR 口白症感染耐過トラフグ血清を用いた口白症関連タンパク質の検出
- 著者
- 高見 生雄 粉川 愉記 西澤 豊彦 吉水 守
- 出版者
- 日本魚病学会 = Japanese Society of Fish Pathology
- 雑誌
- 魚病研究 (ISSN:0388788X)
- 巻号頁・発行日
- vol.42, no.1, pp.29-34, 2007-03-15
- 被引用文献数
- 2 2
Kuchijirosho (snout ulcer disease) is an infectious disease of tiger puffer Takifugu rubripes in Japan and Korea. Little is known about detailed characteristics on the causative agent of kuchijirosho, except it is a filterable agent. In the present study, kuchijirosho associated proteins (KAPs) with molecular weight of 100-120 kDa were detected in brain tissues of tiger puffer by western blot analysis with sera of tiger puffer which survived kuchijirosho, but not in the kidney or spleen tissues. Interestingly, KAPs existed in brain tissues of tiger puffer with no history of kuchijirosho, however, the KAPs were not recognized by those healthy fish sera. KAPs were fractionated in supernatant of brain tissue homogenate containing the kuchijirosho agent by ultra-centrifugation, while pathogenicity of the kuchijirosho agent was observed in the precipitated fraction rather than the supernatant. These results suggest that KAPs are not structural proteins of the kuchijirosho agent, and could be brain tissue proteins antigenically altered by infection of the kuchijirosho agent. It is also considered that the causative agent could be low in antigenicity to host fish because structural proteins of the causative agent was never recognized by host fish sera.