P-selectin-mediated LOX expression promotes insulinoma growth in Rip1-Tag2 mice by increasing tissue stiffness.

P-selectin-mediated LOX expression promotes insulinoma growth in Rip1-Tag2 mice by increasing tissue stiffness.
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P-选择素介导的 LOX 表达通过增加组织硬度促进 Rip1-Tag2 小鼠胰岛素瘤生长

DOI:
10.7150/ijbs.16405
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发表时间:
2016
影响因子:
9.2
通讯作者:
Wei B
Wei B
中科院分区:
生物学2区
文献类型:
--
作者:
Qi C;Li J;Guo S;Li M;Li Y;Li J;Zhang Q;Zheng L;He X;Zheng X;He Y;Wang L;Wei B

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P-选择素是一种细胞粘附分子,是选择素家族的重要成员。最近的研究表明,P-选择素缺失通过抑制血小板在肿瘤组织中的积聚来抑制Rip 1-Tag 2小鼠中的肿瘤生长。本研究旨在评估P-选择素是否以及如何影响Rip 1-Tag 2小鼠的肿瘤硬度。为了探讨P-选择素在组织硬度中的作用,我们使用免疫荧光和组织学染色证明Rip 1-Tag 2小鼠中的肿瘤进展与组织硬度相关。此外,我们发现P-选择素缺乏通过抑制赖氨酰氧化酶(LOX)表达显著降低组织硬度。我们的实验涉及用LOX抑制剂BAPN治疗的Rip 1-Tag 2小鼠,表明BAPN显著消除胶原沉积以降低肿瘤硬度,从而抑制肿瘤生长。这些结果表明,P-选择素缺失通过抑制LOX表达显著降低Rip 1-Tag 2小鼠中的肿瘤硬度。进一步的研究表明,P-选择素介导的血小板聚集主要通过增加LOX表达增加组织硬度,从而促进肿瘤生长。因此,P-选择素可能是治疗人胰岛素瘤的有效靶点。
P-selectin, a cell adhesion molecule, is an important member of the selectin family. Recent studies have shown that P-selectin deletion inhibits tumor growth in Rip1-Tag2 mice by suppressing platelet accumulation in tumor tissues. This study aimed to evaluate whether and how P-selectin affects tumor stiffness in Rip1-Tag2 mice. To explore the role of P-selectin in tissue stiffness, we demonstrated that tumor progression in Rip1-Tag2 mice was correlated with tissue stiffness using immunofluorescence and histological staining. Furthermore, we showed that P-selectin deficiency significantly decreased tissue stiffness by inhibiting lysyl oxidase (LOX) expression. Our experiments involving Rip1-Tag2 mice treated with the LOX inhibitor BAPN showed that BAPN significantly abolished collagen deposition to decrease tumor stiffness and thus inhibit tumor growth. These results indicate that P-selectin deletion significantly decreases tumor stiffness in Rip1-Tag2 mice by inhibiting LOX expression. Further study demonstrated that P-selectin-mediated platelet accumulation increases tissue stiffness mainly by increasing LOX expression and thus promotes tumor growth. Therefore, P-selectin may be an effective therapeutic targeting for treating human insulinomas.
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