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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
6
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] 【C4】
选项
答案
G
解析
副词辨析题。根据此句的句子结构可以得知,此处应选副词作状语。根据该句后半部分的意思可知,为了使斑马鱼在紫外线照射下其表皮细胞和白细胞呈现不同的______,需要______改变斑马鱼,可以推断出空格处所填单词应和基因有关,因此只有genetically一词符合题意。
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