Antigens可以指抗原，是一种可以刺激机体免疫系统产生免疫应答并产生抗体和/或致敏淋巴细胞，从而识别和中和外来的入侵抗原大分子物质的外来物质。
以下是一篇关于Antigens的英文范文，供您参考：
Title: Antigens: An Introduction and Examples
Antigens are proteins or other substances that can stimulate the immune system of an organism to produce antibodies and/or activated T cells, thus recognizing and responding to foreign invaders. These antigens can be either self-antigens or foreign antigens, depending on their origin and the organism's immune response.
Self-antigens are proteins that are naturally present in an organism's body and are recognized as self-components by the immune system. However, if these self-antigens are present in excessive amounts or are altered in some way, they can trigger an immune response that can lead to autoimmune diseases. Conversely, foreign antigens are substances that are not naturally present in an organism's body but are introduced through external sources, such as bacteria, viruses, toxins, or allergens.
Examples of antigens include proteins from bacteria, viruses, toxins, and allergens. When these antigens enter the body, they can trigger an immune response that helps to clear the invading agent and prevent further infection or allergic reactions. However, if the immune response is too strong or directed at the wrong antigens, it can also lead to autoimmune diseases or allergic reactions.
In addition to their role in immune response, antigens can also be used in immunological research and diagnosis to identify and characterize different types of diseases and conditions. For example, antibodies can be used to detect antigens in bodily fluids or tissues, which can help diagnose various diseases such as cancer or infections.
In summary, antigens are proteins or other substances that can stimulate the immune system to recognize and respond to foreign invaders. They play a crucial role in maintaining immune health and can also be used for immunological research and diagnosis.
Antigens可以指抗原，具体来说，是能够诱导（机体）免疫系统发生免疫应答的外来物质。
在英文范文当中，Antigens可能出现在生物医学领域，如免疫学、微生物学等课程中。在某些情况下，抗原可以被定义为能刺激机体免疫反应，并可与免疫应答产物（抗体或淋巴细胞等）结合的物质。
以上内容仅供参考，如有问题可以请教生物老师获取更准确的信息。
Antigens是指抗原，是能够诱导机体的免疫系统产生免疫应答，并能与免疫应答产物抗体或淋巴细胞发生特异性结合的物质。抗原可以是蛋白质、糖类、糖蛋白或者类脂等，常见的抗原包括病原体、异种动物血清等。
以下是一篇关于Antigens的英文范文最新变化：
近年来，抗原检测在临床应用中越来越受到关注。抗原检测是一种通过检测机体免疫系统对特定抗原的应答来诊断疾病的方法。抗原是指能够诱导机体的免疫系统产生免疫应答，并能与免疫应答产物抗体或淋巴细胞发生特异性结合的物质。抗原的种类繁多，包括病原体、异种动物血清等。随着医学技术的不断发展，抗原检测的方法和手段也在不断改进和完善。
在临床实践中，抗原检测的应用范围越来越广泛。例如，在传染病诊断方面，抗原检测可以快速准确地检测出病原体的存在，为临床治疗提供重要依据。此外，抗原检测还可以用于肿瘤、自身免疫性疾病等疾病的诊断和监测。然而，抗原检测也存在一定的局限性，如假阳性或假阴性结果等。因此，在使用抗原检测时，需要结合其他检查方法进行综合评估。
总之，抗原检测是一种重要的临床检测方法，具有广阔的应用前景。随着医学技术的不断进步，抗原检测的方法和手段将会更加完善和准确，为临床治疗提供更加可靠的依据。