A novel approach to thymic rejuvenation in the aged.

A novel approach to thymic rejuvenation in the aged.
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老年人胸腺恢复活力的新方法。

DOI:
10.1089/rej.2006.9.134
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发表时间:
2006
影响因子:
2.6
通讯作者:
Thoman,MarilynL
Thoman,MarilynL
中科院分区:
医学3区
文献类型:
--
作者:
Virts,ElizabethL;Phillips,JoyA;Thoman,MarilynL

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随着年龄的增长,哺乳动物胸腺经历退化,结构完整性和淋巴细胞结构的逐渐丧失,导致T淋巴细胞生成减少。胸腺退化还与极端营养不良和免疫缺陷状态有关,如化疗后或怀孕期间的活动性HIV感染。免疫恢复似乎需要恢复正常的胸腺生成。虽然已知有几种方法可以增加老年人胸腺细胞的数量,包括全身性激素给药、雄激素消融和胸腺组织移植,但每种方法都有特定的局限性,无法广泛应用。本文提出了一种新的方法,以振兴T细胞分化的老年人,采用胸腺内植入工程基质细胞。两种不同的蛋白质已经被检查了它们对通过体细胞植入递送后的胸腺生成的影响。胸腺内注射产生IL-7的基质细胞增强了T细胞发育的最早规范步骤,导致老年胸腺中pro-T细胞的表达增加。相比之下,增加胸腺内音刺猬蛋白水平会减少T细胞生成的这一方面。
With advancing age, the mammalian thymus undergoes involution, a progressive loss of architectural integrity and lymphoid cellularity that results in reduced T lymphopoiesis. Thymic involution also is associated with extreme malnutrition and states of immune deficiency, such as active HIV infection, after chemotherapy, or during pregnancy. Immune recovery appears to require restoration of normal thymopoiesis. Although several means are known to increase thymic cellularity in the aged, including systemic administration of hormones, androgen ablation, and thymic tissue transplantation, each suffers from specific limitations that prevent widespread application. This paper presents a novel approach to rejuvenate T cell differentiation in the aged that employs intrathymic implantation of engineered stromal cells. Two different proteins have been examined for their impact on thymopoiesis after delivery by somatic cell implantation. Intrathymic injection of IL-7–producing stromal cells enhances the earliest specification steps of T cell development, resulting in the increased representation of pro-T cells in the aged thymus. In contrast, increasing the intrathymic levels of sonic hedgehog diminishes this aspect of T cell poiesis.
Sonic Hedgehog 通过抵消 IL-7 诱导的 CD34 前体细胞发育来调节早期人类胸腺细胞分化1
DOI: --
发表时间: 2004
影响因子: 4.4
作者:
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DOI: --
发表时间: 1960
期刊: The Anatomical Record
影响因子: --
作者:
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DOI: --
发表时间: 1992
期刊: Journal of immunology (Baltimore, Md. : 1950)
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发表时间: 1999-10-01
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作者:
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