Antigen-specific immunotherapeutic vaccine for experimental autoimmune myasthenia gravis.

Antigen-specific immunotherapeutic vaccine for experimental autoimmune myasthenia gravis.
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DOI:
10.4049/jimmunol.1401392
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发表时间:
2014-11-15
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
通讯作者:
Lindstrom J
Lindstrom J
中科院分区:
其他
文献类型:
--
作者:
Luo J;Lindstrom J

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重症肌无力 (MG) 和实验性自身免疫性重症肌无力 (EAMG) 是由抗体介导的对肌肉烟碱乙酰胆碱受体 (AChR) 的自身免疫反应引起的,该反应会损害神经肌肉传递,从而导致肌肉无力。之前,我们发现 i. p。注射由细菌表达的人 AChR 亚基细胞质结构域组成的治疗性疫苗可减少大鼠慢性 EAMG 的发展。在这里我们表明,用佐剂中的治疗性疫苗进行免疫不会诱导EAMG,因此是安全的。通过在不完全弗氏佐剂中重复皮下注射低剂量,大大提高了治疗性疫苗的效力和功效。慢性 EAMG 的发作是可以预防的。已建立的慢性 EAMG 可以迅速逆转,模拟慢性 MG 的治疗。通过主要免疫原性区域嵌合体的免疫沉淀测定,治疗减少了病理抗体。成功治疗的大鼠表现出对 EAMG 重新诱导的长期抵抗力,模拟了 MG 的持久治愈。治疗的长期效果是将致病性抗体反应的同种型从固定补体的 IgG2b 改变为不固定补体的 IgG1。慢性EAMG的预防和逆转不是由同种型转换引起的,但同种型转换可能有助于抵抗EAMG的再诱导。佐剂中的 AChR 胞质结构域免疫有望成为一种安全、抗原特异性、强效、有效、快速起效且持久的 MG 治疗方法。
Myasthenia gravis (MG) and experimental autoimmune myasthenia gravis (EAMG) are caused by antibody-mediated autoimmune responses to muscle nicotinic acetylcholine receptors (AChRs) that impair neuromuscular transmission thereby causing muscle weakness. Previously, we discovered that i. p. injection of a therapeutic vaccine consisting of bacterially-expressed cytoplasmic domains of human AChR subunits reduced development of chronic EAMG in rats. Here we show that immunization with the therapeutic vaccine in adjuvant does not induce EAMG, thus is safe. Potency and efficacy of the therapeutic vaccine were greatly increased by administering repeated low doses subcutaneously in incomplete Freund’s adjuvant. Onset of chronic EAMG could be prevented. Established chronic EAMG could be rapidly reversed, modeling therapy of chronic MG. Therapy reduced pathological antibodies assayed by immune precipitation of a main immunogenic region chimera. Successfully treated rats exhibited long-term resistance to re-induction of EAMG, modeling a lasting cure of MG. A long-term effect of therapy was to change isotype of the pathogenic antibody response from IgG2b that fixes complement to IgG1 that does not. Prevention and reversal of chronic EAMG was not caused by the isotype switch, but the isotype switch may contribute to resistance to reinduction of EAMG. Immunization with AChR cytoplasmic domains in adjuvant is promising as a safe, antigen-specific, potent, effective, rapidly acting, and long lasting approach to therapy of MG.
DOI: 10.1155/2013/621693
发表时间: 2013
影响因子: 4.3
作者:
Cousens LP;Su Y;McClaine E;Li X;Terry F;Smith R;Lee J;Martin W;Scott DW;De Groot AS
通讯作者: De Groot AS
主要的免疫原性结构促进了依赖构象肌无力自身抗体,烟碱乙酰胆碱受体构象成熟和激动剂敏感性的结合。
DOI: 10.1523/jneurosci.2833-09.2009
发表时间: 2009-11-04
期刊: The Journal of neuroscience : the official journal of the Society for Neuroscience
影响因子: --
作者:
Luo J;Taylor P;Losen M;de Baets MH;Shelton GD;Lindstrom J
通讯作者: Lindstrom J
DOI: 10.1084/jem.144.3.726
发表时间: 1976-09-01
期刊: The Journal of experimental medicine
影响因子: --
作者:
Lindstrom JM;Einarson BL;Lennon VA;Seybold ME
通讯作者: Seybold ME
DOI: 10.1084/jem.141.6.1365
发表时间: 1975-06-01
期刊: The Journal of experimental medicine
影响因子: --
作者:
Lennon VA;Lindstrom JM;Seybold ME
通讯作者: Seybold ME
DOI: 10.1093/intimm/dxg049
发表时间: 2003-04-01
影响因子: 4.4
作者:
Cribbs, DH;Ghochikyan, A;Agadjanyan, MG
通讯作者: Agadjanyan, MG