细胞巨乳病毒破坏了拉敏A/C,以控制微小管介导的核运动和细胞迁移
Jamil Mahmud1, Ipsita Nandi1, Dean J Procter1
1Department of Microbiology-Immunology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611.
概括
人类细胞巨乳病毒 (HCMV) 操纵了拉胺A/C和SUN2,以控制核运动和细胞迁移. HCMV选择性地降低这些蛋白质的调节,使得乙化微管形成,这对于感染期间的细胞迁移至关重要.
科学领域:
- 病毒学 病毒学
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
背景情况:
- 人类细胞巨乳病毒 (HCMV) 感染改变了核结构.
- 层A/C和SUN2是核骨和细胞骨 (LINC) 复合体的关键组成部分.
- LINC复合体将核外与细胞骨连接起来,影响核定位和细胞迁移.
研究的目的:
- 研究Lamin A/C和SUN2在HCMV诱导的核运动和细胞迁移中的作用.
- 阐明HCMV在感染期间操纵Lamin A/C和SUN2的机制.
- 了解HCMV如何控制细胞骨与细胞核的相互作用.
主要方法:
- 研究了HCMV感染的细胞.
- 研究了Lamin A/C和SUN2.2的表达水平.
- 评估病毒激酶pUL97抑制和Lamin A/C突变对蛋白质表达和细胞骨组织的影响.
- 检查了SUN2或Lamin A/C再表达的影响.
- 分析了乙化微管在核运动和细胞迁移中的作用.
- 削弱了氨酸乙转移酶ATAT1.1. 的作用.
主要成果:
- HCMV降低了Lamin A/C和SUN2的调节,以促进病毒的退出和后期的核细胞骨重新连接.
- 病毒激酶pUL97的抑制或非酸化拉胺A/C突变体的表达没有恢复SUN2的表达或动因组合.
- 在SUN2或Lamin A/C的外源性再表达中,受损的乙化微管形成.
- 抑制pUL97,Lamin A/C突变体或ATAT1枯竭会损害HCMV诱导的核运动和细胞迁移.
结论:
- HCMV采用多种策略来降低Lamin A/C和SUN2.
- 这些降低调节可以防止干扰乙化微管形成,这对于核运动和细胞迁移至关重要.
- 揭示了HCMV感染中Lamin A/C重塑的新型作用,并提供了对核细胞骨控制的见解.
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