Defective natural killer cell anti-viral capacity in paediatric HBV infection.

Defective natural killer cell anti-viral capacity in paediatric HBV infection.
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DOI:
10.1111/cei.12470
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发表时间:
2015-03
影响因子:
4.6
通讯作者:
Peppa D
Peppa D
中科院分区:
医学3区
文献类型:
--
作者:
Heiberg IL;Pallett LJ;Winther TN;Høgh B;Maini MK;Peppa D

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自然杀伤(NK)细胞在成人慢性B型肝炎病毒(HBV)感染(CH B)中表现出失调的效应功能,这可能有助于病毒的持续存在。NK细胞在围产期HBV感染儿童中的作用研究较少。进入一个独特的队列,使横截面评估NK细胞的频率,表型和功能在HBV感染的儿童相对于未感染的儿童。我们观察到NK细胞干扰素(IFN)-γ产生的选择性缺陷,具有保守的细胞溶解功能,反映了在成人感染中观察到的功能二分法。NK细胞上NKp 30表达的减少表明受损的NK-树突细胞(DC)细胞相互作用作为导致IFN-γ产生减少的潜在机制的作用。儿童CHB中NK细胞已经存在缺陷,尽管不如成人CHB广泛,但这一发现对旨在恢复免疫控制的抗病毒治疗的时机具有潜在影响。
Natural killer (NK) cells exhibit dysregulated effector function in adult chronic hepatitis B virus (HBV) infection (CHB), which may contribute to virus persistence. The role of NK cells in children infected perinatally with HBV is less studied. Access to a unique cohort enabled the cross-sectional evaluation of NK cell frequency, phenotype and function in HBV-infected children relative to uninfected children. We observed a selective defect in NK cell interferon (IFN)-γ production, with conserved cytolytic function, mirroring the functional dichotomy observed in adult infection. Reduced expression of NKp30 on NK cells suggests a role of impaired NK-dendritic cell (DC) cellular interactions as a potential mechanism leading to reduced IFN-γ production. The finding that NK cells are already defective in paediatric CHB, albeit less extensively than in adult CHB, has potential implications for the timing of anti-viral therapy aiming to restore immune control.
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