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It seems individual cancer cells send out the same distress signals as wo
It seems individual cancer cells send out the same distress signals as wo
游客
2024-01-23
5
管理
问题
It seems individual cancer cells send out the same distress signals as wounds, tricking immune cells into helping them grow into tumours. The finding suggests that anti-inflammatory drugs could help to combat or prevent cancer. "Lifelong, if you take a small quantity of something that【C1】______ inflammation (炎症), such as aspirin, it could reduce the risk of cancer," says Adam Hurlstone of the University of Manchester, UK.
When tissue is wounded or infected it produces hydrogen peroxide. White blood cells called leukocytes (白细胞) are among the first cells to react to this【C2】______ , homing in to kill the infectious agent, clean up the mess and rebuild【C3】______ tissue. At first, the tissue becomes inflamed, but this subsides as the wound is cleared and rebuilding continues. Now, a study in zebra fish shows that this process is also instigated (唆使) and sustained by tumour cells.
Hurlstone and his colleagues【C4】______ engineered zebra fish so that skin cells and leukocytes would show different【C5】______ under ultraviolet light. Some zebra fish were also engineered to have cancerous skin cells.
The team found that the cancerous skin cells secreted (分泌) hydrogen peroxide,【C6】______ leukocytes which helped them on their way to become a tumour. When the team【C7】______ hydrogen peroxide production in the zebra fish, the leukocytes were no longer attracted to cancerous cells and the cancer colonies reduced in【C8】______.
More alarmingly, the researchers found that healthy skin cells【C9】______ to the cancerous ones also produced hydrogen peroxide, suggesting that cancer cells【C10】______ co-opt them into triggering inflammation.
A) adjacent
B) blocked
C) changed
D) colors
E) damaged
F) figure
G) genetically
H) hue
I) hurtful
J) number
K) somehow
L) somewhat
M) summoning
N) suppresses
O) trigger [br] 【C6】
选项
答案
M
解析
动词辨析题。空格处所在的句子由两部分组成,根据前一部分的语法结构和两部分之间所使用的标点符号可以得知,逗号前面为主要成分,后面为修饰性或补充说明性成分,依附于前一部分,因此此处应为动词的分词形式。结合选项和句子所提供的信息可知,summoning“召集”为正确答案。
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