Mucosal transmission of cell-associated and cell-free feline immunodeficiency virus.

Mucosal transmission of cell-associated and cell-free feline immunodeficiency virus.
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细胞相关和无细胞猫免疫缺陷病毒的粘膜传播。

DOI:
10.1089/aid.1997.13.347
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发表时间:
1997
期刊:
AIDS research and human retroviruses.
影响因子:
--
通讯作者:
Hoover,EA
Hoover,EA
中科院分区:
--
文献类型:
--
作者:
Burkhard,MJ;Obert,LA;O'Neil,LL;Diehl,LJ;Hoover,EA

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通过将阴道或直肠粘膜单次暴露于感染性外周血单核细胞(PBMC)、感染性血浆或无细胞培养病毒,评估猫免疫缺陷病毒(FIV)引起的粘液瘤感染。所有接种无细胞培养病毒(100或400 TCID)的猫和9/10只接种感染PBMC(2 x 107或2 x 105)的猫在3周内出现持续性病毒血症。接种2 x 103 PBMC的猫均未出现病毒血症。直肠和阴道暴露同样是诱导病毒血症的有效途径。CD 4 +T细胞和丝裂原刺激的PBMC增殖下降,在所有感染的猫。然而,在大多数病毒暴露的猫,特别是那些没有发展出可检测到的感染,发生了短暂的PBMC增殖反应FIV p24 gag。FIV不通过粘膜暴露于血浆中的感染性病毒(100 TCID)而传播,该剂量是通过亲代注射感染所需剂量的10倍。体外研究表明,血浆热稳定病毒中和因子可能与血浆病毒通过粘膜途径建立感染的失败有关。粘液FIV感染提供了一种新的模型,用于研究感染的早期阶段和经粘膜慢病毒感染的干预。
Mucosal infection by feline immunodeficiency virus (FIV) was assessed via a single exposure of the vaginal or rectal mucosa to either infectious peripheral blood mononuclear cells (PBMCs), infectious plasma, or cellfree cultured virus. All cats inoculated with cell-free cultured virus (100 or 400 TCID) and 9 of 10 cats inoculated with infected PBMCs (2 x 107or 2 x 105) became persistently viremic within 3 weeks. Neither cat inoculated with 2 x 103PBMCs became viremic. Rectal and vaginal exposure were equally effective routes to induce viremia. CD4+T cells and mitogen-stimulated PBMC proliferation declined in all infected cats. However, a transient PBMC proliferative response to FIV p24gagoccurred in most virus-exposed cats, especially those that did not develop detectable infection. FIV was not transmitted by mucosal exposure to infectious virus in plasma (100 TCID), a dose > 10-fold that needed for infection by parental injection.In vitrostudies suggested that a plasma heat-stable virus-neutralizing factor may be associated with failure of plasma virus to establish infection via the mucosal route. Mucosal FIV infection provides a new model with which to study early stages of infection and intervention in transmucosal lentivirus infections.
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