Development of a peptide inhibitor of hyaluronan-mediated leukocyte trafficking.

Development of a peptide inhibitor of hyaluronan-mediated leukocyte trafficking.
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DOI:
10.1084/jem.192.6.769
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发表时间:
2000-09-18
期刊:
The Journal of experimental medicine
影响因子:
--
通讯作者:
Takashima A
Takashima A
中科院分区:
其他
文献类型:
--
作者:
Mummert ME;Mohamadzadeh M;Mummert DI;Mizumoto N;Takashima A

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透明质酸(HA)是一种高分子量的糖胺聚糖,在细胞外基质和细胞表面大量表达。虽然已知透明质酸可以结合许多粘附分子,但关于其直接生理作用的信息很少。在这项研究中,我们利用噬菌体展示技术开发了一种新的12聚体(GAHWQFNALTVR) HA肽抑制剂,称为“Pep-1”。Pep-1与可溶性、固定化和细胞相关形式的HA具有特异性结合,并且几乎完全抑制白细胞对HA底物的粘附。全身、局部或局部给药Pep-1通过阻断炎性白细胞的皮肤定向归巢,抑制小鼠接触性超敏反应的表达。Pep-1还通过阻断半抗原触发的朗格汉斯细胞从表皮的迁移来抑制致敏期。这些观察结果证明,透明质酸在白细胞进出炎症组织的“双向”运输中起着至关重要的作用,因此为测试透明质酸抑制剂(例如Pep-1)对炎症性疾病的潜在功效提供了技术和概念基础。
Hyaluronan (HA), a high molecular weight glycosaminoglycan, is expressed abundantly in the extracellular matrix and on cell surfaces. Although HA is known to bind many adhesion molecules, little information has been available with respect to its direct physiological role. In this study, we developed a novel 12-mer (GAHWQFNALTVR) peptide inhibitor of HA, termed “Pep-1,” by using phage display technology. Pep-1 showed specific binding to soluble, immobilized, and cell-associated forms of HA, and it inhibited leukocyte adhesion to HA substrates almost completely. Systemic, local, or topical administration of Pep-1 inhibited the expression of contact hypersensitivity responses in mice by blocking skin-directed homing of inflammatory leukocytes. Pep-1 also inhibited the sensitization phase by blocking hapten-triggered migration of Langerhans cells from the epidermis. These observations document that HA plays an essential role in “two-way” trafficking of leukocytes to and from an inflamed tissue, and thus provide technical and conceptual bases for testing the potential efficacy of HA inhibitors (e.g., Pep-1) for inflammatory disorders.
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影响因子: 4.7
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