Variability of bio-clinical parameters in Chinese-origin Rhesus macaques infected with simian immunodeficiency virus: a nonhuman primate AIDS model.

Variability of bio-clinical parameters in Chinese-origin Rhesus macaques infected with simian immunodeficiency virus: a nonhuman primate AIDS model.
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DOI:
10.1371/journal.pone.0023177
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发表时间:
2011
期刊:
影响因子:
3.7
通讯作者:
Lu W
Lu W
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Chen S;Lai C;Wu X;Lu Y;Han D;Guo W;Fu L;Andrieu JM;Lu W

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尽管感染猿猴免疫缺陷病毒(SIV)的中国恒河猴(Ch RhMs)多年来一直被用来评估艾滋病疫苗和治疗的功效,但迄今为止尚未建立这种非人灵长类艾滋病模型的生物临床变异性。通过将 150 只(78 只雄性和 72 只雌性)具有不同 MHC I 类等位基因的 Ch RhM 随机分为 3 组(每组 50 只动物),接受直肠内 (ir) SIVmac239、静脉内 (iv) SIVmac239 或 iv SIVmac251 攻击,我们评估了 118 周生物临床终点的变异性。所有受到 SIV 攻击的 Ch RhM 在 1-2 周内均呈 SIV 血清阳性。血浆病毒载量 (VL) 在第 1-2 周达到峰值,然后从第 5 周开始下降至设定点水平。感染 SIVmac239 (ir 或 iv) 的动物的设定点 VL 比感染 SIVmac251 (iv) 的动物高 30 倍。血浆 VL 的这种差异随着时间的推移而增加(从第 68 周开始> 100 倍)。感染 SIVmac239 (ir 或 iv) 的动物进展为 AIDS 或死亡的速度比感染 SIVmac251 (iv) 的动物更快。在接受 ir 或 iv SIVmac239 攻击的动物中,未观察到生物临床终点存在显着差异。感染 SIVmac239(ir 或 iv)的动物中峰值/设定点 VL 的变异性(标准差)比感染 SIVmac251(iv)的动物低近二分之一,这使得使用 SIVmac239 的动物比使用 SIVmac251 的动物少二分之一,可以检测到相同的治疗相关差异。这些结果提供了使用 Ch RhM SIV 模型设计研究时所需的生物临床终点变异性的可靠估计,并有助于提高临床前研究的质量和标准化。
Although Chinese-origin Rhesus macaques (Ch RhMs) infected with simian immunodeficiency virus (SIV) have been used for many years to evaluate the efficacy of AIDS vaccines and therapeutics, the bio-clinical variability of such a nonhuman primate AIDS model was so far not established. By randomizing 150 (78 male and 72 female) Ch RhMs with diverse MHC class I alleles into 3 groups (50 animals per group) challenged with intrarectal (ir) SIVmac239, intravenous (iv) SIVmac239, or iv SIVmac251, we evaluated variability in bio-clinical endpoints for 118 weeks. All SIV-challenged Ch RhMs became seropositive for SIV during 1–2 weeks. Plasma viral load (VL) peaked at weeks 1–2 and then declined to set-point levels as from week 5. The set-point VL was 30 fold higher in SIVmac239 (ir or iv)-infected than in SIVmac251 (iv)-infected animals. This difference in plasma VL increased overtime (>100 fold as from week 68). The rates of progression to AIDS or death were more rapid in SIVmac239 (ir or iv)-infected than in SIVmac251 (iv)-infected animals. No significant difference in bio-clinical endpoints was observed in animals challenged with ir or iv SIVmac239. The variability (standard deviation) in peak/set-point VL was nearly one-half lower in animals infected with SIVmac239 (ir or iv) than in those infected with SIVmac251 (iv), allowing that the same treatment-related difference can be detected with one-half fewer animals using SIVmac239 than using SIVmac251. These results provide solid estimates of variability in bio-clinical endpoints needed when designing studies using the Ch RhM SIV model and contribute to the improving quality and standardization of preclinical studies.
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