Interleukin 6 inhibits delayed‐type hypersensitivity and the development of adjuvant arthritis

Interleukin 6 inhibits delayed‐type hypersensitivity and the development of adjuvant arthritis
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白细胞介素 6 抑制迟发型超敏反应和佐剂关节炎的发展

DOI:
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发表时间:
1991
影响因子:
5.4
通讯作者:
Y. Ohsugi
Y. Ohsugi
中科院分区:
医学3区
文献类型:
--
作者:
M. Mihara;M. Ikuta;Y. Koishihara;Y. Ohsugi

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探讨白细胞介素6(IL 6)对迟发型超敏反应(DTH)的影响。用绵羊红细胞(SRBC)免疫的小鼠,免疫后第5天,抗原攻击后爪可引起迟发型超敏反应。通过检测抗原攻击后24小时的足垫肿胀来评估反应的大小。皮下注射IL-6可显著抑制诱导期的DTH,且呈剂量依赖关系。背部注射2.5μg,每日2次(5μg/d),从免疫当天(第0天)至抗原攻击前第1天(第4天),连续5天。热灭活IL-6不抑制迟发型超敏反应。此外,抗IL 6抗体的亲和层析可完全消除IL 6的抑制活性。仅在第0天和第1天给予IL-6,而在第3天和第4天不给予IL-6,也能获得这种抑制。这表明IL-6在DTH形成的诱导期早期起作用。此外,在抗原攻击后给予IL-6也能抑制足垫肿胀。这些结果表明,IL-6对迟发型超敏反应的诱导期和效应期均有抑制作用。为了进一步证实IL-6的这种抑制作用,我们检测了它对大鼠佐剂性关节炎形成的影响。给予IL-6也可显著抑制佐剂性关节炎的发展。
We studied the effect of interleukin 6 (IL 6) on the delayed‐type hypersensitivity (DTH). In mice immunized with sheep red blood cells (SRBC), a DTH response was evoked by antigen challenge into the hind paw 5 days after immunization. The magnitude of the response was assessed by footpad swelling measured 24 h after antigen challenge. IL 6 significantly suppressed the DTH in its induction phase in a dose‐dependent manner when administered s.c. into the back at a dose of > 2.5 μg twice a day (5 μg/day) for 5 consecutive days from the day of immunization (day 0) to 1 day before antigen challenge (day 4). Heat‐inactivated IL 6 did not suppress the DTH response. Furthermore, the suppressive activity of IL 6 was completely abolished by affinity chromatography on an anti‐IL 6 antibody. This suppression was also obtained when IL 6 was administered only on day 0 and day 1, but not on days 3 and 4. This indicates that IL 6 acts on the early part of the induction phase of DTH development. Furthermore, footpad swelling was suppressed even by the administration of IL 6 after antigen challenge. These results show that IL 6 suppresses both the induction and effector phases of DTH. To confirm further this inhibitory effect of IL 6, we examined its effect on the development of adjuvant arthritis in rats. Administration of IL 6 also significantly suppressed the development of adjuvant arthritis.
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