用古老的熱疗法治疗癌症一托福阅读机经背景.docxVIP

智课网TOEFL备考资料用古老的热疗法治疗癌症一托福阅读机经背景 Scientists are putting a modern spin on a cancer treatment that goes back to antiquity. Its heat therapy, which is getting a new look with the help of microscopic particles of gold. 科学家们正在利用一种古代技术来治疗癌症。在纳米技术的协助下，热疗发挥出新的作用。 Cancer treatments usually involve powerful drugs or radiation. But heating up the tumor — hyperthermia — can also be part of the therapy. 癌症治疗通常需要采用强力药物或者是放疗技术。但是，给肿瘤加热，或者称肿瘤热疗，也可以作为治疗的一部分。 Hyperthermia is an old technology ... first recorded in papyrus by the Egyptians, I believe. Its the first known treatment of breast cancer, says Jeffrey Rosen of the Baylor College of Medicine in Texas. The idea is that as you raise temperature, you induce a heat shock in cells, and that this makes them more susceptible to the damage caused by chemotherapy and radiation. “这种治疗是通过加热，让癌细胞对化疗和放疗带来的破坏更敏感。” Rosen has just published new research on how some new materials can help harness the potential of hyperthermia for cancer treatment. 罗森医生最近发表了一份新的研究报告，介绍一些新物质如何能让热疗医治癌症变得更安全。 One problem in using heat against cancers is that it can damage surrounding, healthy tissue. Rosen says that microscopic particles of gold — nanoparticles — can be injected into the body to make sure the heat gets to the right place. 用热疗治疗癌症有一个问题，那就是，它会伤害到周围健康的细胞组织。罗森医生表示，可以把被称为“纳米颗粒”的微粒黄金，注射进身体中，以确保热源直接进入正确的部位。 The gold nanoparticles have this ability to be activated by near-infrared lasers so that they can be heated quite rapidly, he says. 他说：“黄金纳米颗粒可以被近红外线激光激活，从而非常迅速地被加热。” And Rosen adds that the nanoparticles travel to where theyre needed, to the cancer, so the healthy tissue doesnt get heated up. 罗森医生说，纳米颗粒可以到达癌细胞所在位置，这样健康的细胞组织就不会受到影响。 Youll have those gold nanoparticles actually accumulating in the leaky blood vessels of the tumor, and then the laser can be used locally just to heat that area. “我们可以让黄金纳米颗粒聚集到肿瘤上有破洞的血管上，然后使用激光局部加热那个地方。” In this study, the tumor was heated to 42 degrees for 20 minutes