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Dynamics of cells function on laser cell-chip system

机译:激光细胞芯片系统上细胞功能的动力学

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A new type of cell-cultivation system based on laser processing has been developed for the on-chip cultivation of living cells. We introduce a "laser cell-chip", on which migration of cells, such as stem cells, tumor cells or immunocompetent cells, can be observed. A sheet prepared from epoxy resin was processed by KrF excimer laser (248 nm, 1.6 J/cm~2) for preparation of microgrooved surfaces with various groove width, spacing, and depth. A laser cell-chip can make kinetic studies of cell migration depending on the concentration gradient of a chemoattractant. In this study, megakaryocytes were used for the migration on a groove of laser cell-chip by the concentration gradient of the stromal cell derived factor 1 (SDF-1/CXCL12). SDF-1/CXCL12 plays an important and unique role in the regulation of stem/progenitor cell trafficking. A megakaryocyte was migrated on a groove of laser cell-chip depending on the optical concentration gradient of SDF-1/CXCL12. Since SDF-1/CXCL12-induced migration of mature megakaryocyte was known to increase the platelet production in the bone marrow extravascular space, the diagnosis of cell migration on laser cell-chip could provide a new strategy to potentially reconstitute hematopoiesis and avoid life-threatening hemorrhage after myelosuppression or bone marrow failure.
机译:已经开发出一种基于激光加工的新型细胞培养系统,用于活细胞的芯片上培养。我们引入了“激光细胞芯片”,在其上可以观察到细胞(例如干细胞,肿瘤细胞或免疫活性细胞)的迁移。用KrF准分子激光(248 nm,1.6 J / cm〜2)处理由环氧树脂制成的片材,以制备具有各种凹槽宽度,间距和深度的微沟槽表面。激光细胞芯片可以根据趋化剂的浓度梯度对细胞迁移进行动力学研究。在这项研究中,巨核细胞通过基质细胞衍生因子1(SDF-1 / CXCL12)的浓度梯度在激光细胞芯片的凹槽中迁移。 SDF-1 / CXCL12在干/祖细胞运输的调节中起着重要而独特的作用。根据SDF-1 / CXCL12的光学浓度梯度,巨核细胞迁移到激光细胞芯片的凹槽上。由于已知SDF-1 / CXCL12诱导的成熟巨核细胞迁移会增加骨髓血管外空间中的血小板生成,因此在激光细胞芯片上诊断细胞迁移可为潜在的造血重建和避免危及生命提供新的策略。骨髓抑制或骨髓衰竭后出血。

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