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Virotherapy : ウィキペディア英語版
Virotherapy
Virotherapy is a treatment using biotechnology to convert viruses into therapeutic agents by reprogramming viruses to treat diseases. There are three main branches of virotherapy: anti-cancer oncolytic viruses, viral vectors for gene therapy and viral immunotherapy. In a slightly different context, virotherapy can also refer more broadly to the use of viruses to treat certain medical conditions by killing pathogens.
==Oncolytic virotherapy==

Oncolytic virotherapy is not a new idea – as early as the mid 1950s doctors were noticing that cancer patients who suffered a non-related viral infection, or who had been vaccinated recently, showed signs of improvement; this has been largely attributed to the production of interferon and tumour necrosis factors in response to viral infection, but oncolytic viruses are being designed that selectively target and lyse only cancerous cells.
In the 1940s and 1950s, studies were conducted in animal models to evaluate the use of viruses in the treatment of tumours. In the 1940s-50s some of the earliest human clinical trials with oncolytic viruses were started. However, for several years research in this field was delayed due to the inadequate technology available. Research has now started to proceed more quickly in finding ways to use viruses therapeutically.
As well as the direct anti-cancer effect, oncolytic viruses are also capable of inducing an anti-tumour immune response.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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