科學家發現免疫系統的新部分

A groundbreaking discovery has been made by scientists regarding a new part of the immune system that holds great promise for the development of new antibiotics. This finding is particularly significant as it could provide new solutions to combat the increasing problem of superbugs, which are bacteria that have developed resistance to existing antibiotics. The researchers from Israel have revealed that a component of the immune system, known as the proteasome, has a hidden ability to produce powerful chemicals that can effectively kill bacteria. The proteasome is a small structure found in every cell of the body, and its primary function is to break down old proteins into smaller pieces for recycling. However, the researchers have shown that when a cell is infected by bacteria, the proteasome undergoes a transformation. It changes its structure and begins to convert old proteins into antimicrobial weapons that can penetrate and destroy the outer membrane of bacteria. Prof Yifat Merbl, a leading scientist from the Weizmann Institute of Science, expressed her excitement about this discovery, stating, 'This is really exciting because we never knew that this was happening. We discovered a novel mechanism of immunity that allows us to defend against bacterial infections. ' The research team conducted a series of experiments, which they humorously referred to as 'dumpster diving,' to uncover these natural antibiotics. They tested these antibiotics on bacteria in laboratory settings and on mice suffering from pneumonia and sepsis. The results were promising, showing that the new antibiotics were as effective as some of the established ones. Furthermore, when the researchers disabled the proteasome in laboratory cells, they found that these cells were much more susceptible to infections from bacteria like Salmonella. Prof Daniel Davis, an immunologist at Imperial College London, commented on the findings, describing them as 'extremely provocative and very interesting. ' He noted that this discovery changes our understanding of how the body fights infections, emphasizing the importance of this newly identified process in producing anti-germ molecules within our cells. However, he also cautioned that while this discovery is exciting, it will take time to explore its potential as a new source of antibiotics. The issue of antibiotic resistance is a pressing global health concern, with over a million people estimated to die each year from infections that are resistant to current treatments. Despite the urgent need for new antibiotics, there has been a lack of research and development in this area. Against this backdrop, the discovery of a new source of antibiotics within our own bodies offers a glimmer of hope for scientists. Dr Lindsey Edwards, a senior lecturer in microbiology at King's College London, shared her enthusiasm, stating, 'It's a potential goldmine for new antibiotics, that's quite exciting. In previous years, we relied on digging up soil to find new antibiotics, but now we have discovered something that is already present within us. This is a remarkable advancement, and it comes down to having the technology to detect these substances. ' She also pointed out that developing these new antibiotics into drugs may face fewer challenges since they are already natural products of the human body, which could simplify the safety evaluation process.