首页
登录
职称英语
A meager diet may give you health and long life, but it’s not much fun—and it
A meager diet may give you health and long life, but it’s not much fun—and it
游客
2023-12-23
15
管理
问题
A meager diet may give you health and long life, but it’s not much fun—and it might not even be necessary. We may be able to hang on to most of that youthful vigor even if we don’t start to diet until old age.
Stephen Spindler and his colleagues from the University of California at Riverside have found that some of an elderly mouse’s liver genes can be made to behave as they did when the mouse was young simply by limiting its food for four weeks. The genetic rejuvenation won’t reverse other damage caused by time for the mouse, but could help its liver metabolize drugs or get rid of toxins.
Spindler’s team fed three mice a normal diet for their whole lives, and fed another three on half-rations. Three more mice were switched from the normal diet to half-feed for a month when they were 34 months old—equivalent to about 70 human years.
The researchers checked the activity of 11,000 genes from the mouse livers, and found that 46 changed with age in the normally fed mice. The changes were associated with things like inflammation and free radical production—probably bad news for mouse health. In the mice that had dieted all their lives, 27 of those 46 genes continued to behave like young genes. But the most surprising finding was that the mice that only started dieting in old age also benefited from 70 percent of these gene changes.
"This is the first indication that these effects kick in pretty quickly," says Huber Warner from the National Institute on Aging near Washington, D.C..
No one yet knows if calorie restriction works in people as it does in mice, but Spindler is hopeful. "There’s attracting and tempting evidence out there that it will work," he says.
If it does work in people, there might be good reasons for rejuvenating the liver. As we get older, our bodies are less efficient at metabolizing drugs, for example. A brief period of time of dieting, says Spindler, could be enough to make sure a drug is effective.
But Spindler isn’t sure the trade-off is worth it. "The mice get less disease, they live longer, but they’re hungry," he says. "Even seeing what a diet does, it’s still hard to go to a restaurant and say: ’I can only eat half of that’."
Spindler hopes we soon won’t need to diet at all. His company, Life Span Genetics in California, is looking for drugs that have the effects of calorie restriction. [br] According to the last two paragraphs, Spindler believes that ______.
选项
A、calorie restriction is very important to people
B、seeing the effect of a diet, people will eat less than normal
C、dieting might not be the best method to give us health and a long life
D、drugs do not have the effects of calorie restriction
答案
C
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3299379.html
相关试题推荐
Whenonehasgoodhealth,________shouldfeelfortunate.A、youB、sheC、heD、weC当
Underthecircumstanceofanewmediaage,emergenciesofpublichealthcanbem
[originaltext]Italianscientistshaveraisednewhealthconcernsaboutthesafe
[originaltext]Italianscientistshaveraisednewhealthconcernsaboutthesafe
[originaltext]Italianscientistshaveraisednewhealthconcernsaboutthesafe
Fromthehealthpointofviewwearelivinginamarvelousage.Weareimmuni
Fromthehealthpointofviewwearelivinginamarvelousage.Weareimmuni
Fromthehealthpointofviewwearelivinginamarvelousage.Weareimmuni
Ameagerdietmaygiveyouhealthandlonglife,butit’snotmuchfun—andit
Ameagerdietmaygiveyouhealthandlonglife,butit’snotmuchfun—andit
随机试题
She’s(fortune)______enoughtoenjoygoodhealth.fortunate根据句子结构可以看出is后需要一个形容词
Ladiesandgentlemen:YourtourinChinais(11)toaclose.WhenIfirstm
AremarkablethinghappenedinNewYorkrecently:thestatelegislature,in
()是指患者到医疗机构测量血压高于140/90mmHg,但动态血压24小时平均值
关于黏膜支持式义齿,错误的是A.基牙采用三臂卡固位 B.用于缺牙多,基牙健康差
心肌梗死发病5天下列血清酶对诊断有帮助的是A.肌酸激酶MB同工酶B.肌酸激酶C.
急性胰腺炎的主要表现和首发症状是A.发热 B.恶心、呕吐及腹胀 C.腹痛
属于银行市场定位的内容是()。 A.产品定位和银行形象B.收益定位和价格定
支原体肺炎首选()A.青霉素 B.多西环素 C.甲氧西林 D.阿奇霉素
水玻璃硬化时能堵塞材料的毛细孔隙,有()的作用。 A.黏合性 B.耐水
最新回复
(
0
)