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【诺奖精读】照一束蓝光, 小鼠就会开始吃东西?

【诺奖精读】照一束蓝光, 小鼠就会开始吃东西? BigAcademy.ai
2026-10-06
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照一束蓝光,
小鼠就会开始吃东西?

Can Blue Light Make a Mouse Eat?

2026 年诺贝尔生理学或医学奖,表彰了一种“用光研究神经细胞”的方法。一个经典小鼠实验,让抽象的技术变成了非常生活化的问题:食欲,能被某组神经细胞推着走吗?

英文约390词 · 2026年诺奖成果
案例研究发表于2011年 · CEFR参考难度:B2

本栏目英文依据卡罗林斯卡医学院诺奖公告、HHMI 研究报道及原研究摘要重新编写,为原创精读稿,并非来源原文的逐字转载。

诺奖公告 · 原句节选

“a light-controlled switch for nerve cells”

这句话说的是研究工具:让选定神经细胞对光作出反应。

READ · THINK

逐段精读

01 / 06

Why did a Nobel Prize about light lead scientists to a question about lunch? In 2026, Peter Hegemann, Georg Nagel and Karl Deisseroth won the Nobel Prize in Physiology or Medicine for optogenetics. This method lets researchers use light to study selected nerve cells. One earlier experiment asked a simple question: can turning on certain cells change how much a mouse eats?

译文

一项关于光的诺贝尔奖,怎么会把科学家带到“午饭吃多少”这个问题上?2026 年,Hegemann、Nagel 和 Deisseroth 因光遗传学获得诺贝尔生理学或医学奖。这种方法让研究者用光研究选定的神经细胞。一项更早的实验问:激活某些细胞,会改变小鼠的进食量吗?

释义与用法

optogenetics 光遗传学

opto- 与光有关;genetics 与遗传有关。这里指借助感光蛋白,用光调控特定细胞活动。

selected nerve cells 选定的神经细胞

selected 强调研究对象经过选择,并非整颗大脑一起被光控制。

一句话拆解

One earlier experiment asked a simple question: can turning on certain cells change how much a mouse eats?

冒号后给出实验问题;can ... change ...? 问的是可否造成变化,而非只看两者是否相关。


02 / 06

The story began with a tiny alga that swims towards light. Two laureates found a protein in the alga that responds to blue light. When light hits it, a channel opens and charged particles move into the cell. A third laureate later showed that the protein could make nerve cells light-sensitive. Scientists now had a way to activate particular cells at a chosen moment.

译文

故事始于一种会游向光源的微小藻类。两位获奖者发现,藻类里有一种能响应蓝光的蛋白质。光照到它时,一条通道会打开,带电粒子进入细胞。第三位获奖者后来证明,这种蛋白质可以让神经细胞对光敏感。科学家由此获得一种方法,能在选定的时刻激活特定细胞。

释义与用法

light-sensitive 对光敏感的

be sensitive to light 对光敏感;sensitive to 也可用于声音、温度或批评。

activate 激活;使开始活动

activate a cell / activate an alarm。这里是让特定神经细胞发出信号。

一句话拆解

When light hits it, a channel opens and charged particles move into the cell.

When 引出条件和时间;后面用 opens and ... move 串起两个连续变化。it 指感光蛋白。


03 / 06

In a study published in 2011, another team used this tool to investigate eating in mice. They made a group of hunger-related cells, called AgRP neurons, responsive to blue light. Light was delivered into the brain through an implanted device. The team also tested another group, called POMC neurons, and compared the animals with control mice. This was a laboratory procedure, not a lamp shining through fur.

译文

2011 年发表的一项研究中,另一支团队用这项工具研究小鼠进食。他们让一组与饥饿有关、名为 AgRP 神经元的细胞能够响应蓝光。光通过植入装置送入大脑。团队还测试了另一组名为 POMC 的神经元,并与对照组小鼠比较。这是实验室操作,不是拿灯隔着毛发照小鼠。

释义与用法

responsive to 对……有反应的

be responsive to light / treatment;to 后面接名词或动名词。

control mice 对照组小鼠

control group 对照组;比较组帮助判断观察到的变化是否来自实验操作。

一句话拆解

They made a group of hunger-related cells, called AgRP neurons, responsive to blue light.

make + 宾语 + 形容词 表示“使……变得……”。called AgRP neurons 插在中间,补充细胞名称。


04 / 06

When the researchers stimulated AgRP neurons, the mice moved to their food and began eating quickly. In one hour, the stimulated mice ate about 20 times as much as the controls. The more of these neurons were activated, the more food the animals ate. When the light stopped, the extra eating stopped too. The result showed that activating this cell group could drive feeding in this experiment.

译文

研究者刺激 AgRP 神经元后,小鼠走向食物并迅速开始进食。在一小时内,受刺激的小鼠吃下的食物约为对照组的 20 倍。被激活的这类神经元越多,小鼠吃得越多;光停止时,额外的进食也停止了。结果表明,在这项实验中,激活这组细胞能够推动进食行为。

释义与用法

drive feeding 促使进食

drive 在这里不是“驾驶”,而是“推动、促成”;drive a change 促成变化。

controls 对照组

研究报道常用 controls 指接受不同处理、用于比较的对照动物。

一句话拆解

The more of these neurons were activated, the more food the animals ate.

the more ..., the more ... 表示“越……就越……”。这是实验中的变化趋势,不表示人人都能这样控制食欲。


05 / 06

The second cell group produced a different result. Stimulating POMC neurons reduced the mice's food intake over a day, rather than causing the same immediate response. The researchers therefore saw two different patterns: one group could rapidly encourage eating, while the other could suppress it over a longer period. Appetite involves several signals and brain areas, so a single on-off switch is only a useful metaphor.

译文

第二组细胞带来了不同结果。刺激 POMC 神经元后,小鼠一天内的进食量减少;它没有引发与前一组一样迅速的反应。研究者因此观察到两种不同模式:一组细胞能很快促使进食,另一组则能在更长时间里抑制进食。食欲还涉及多种信号和脑区,因此“开关”只是帮助理解的比喻。

释义与用法

patterns 模式;规律

a pattern of behaviour 行为模式;这里也包括两组细胞作用速度的不同。

suppress 抑制;使减少

suppress appetite 抑制食欲;研究中实际测量的是小鼠进食量。

一句话拆解

One group could rapidly encourage eating, while the other could suppress it over a longer period.

while 在这里表示对比;it 指 eating。rapidly 与 over a longer period 也形成时间对照。


06 / 06

So can a blue bedside lamp control your hunger? No. The mice needed specially prepared cells and light delivered inside the brain. The experiment offers evidence about mouse feeding circuits, but did not test a treatment for human appetite. The Nobel-winning method lets scientists move beyond correlation: they can change a defined cell group and observe what happens next.

译文

那么,床头放一盏蓝灯,就能控制人的饥饿感吗?不能。实验中的小鼠需要经过特别处理的细胞,还需要把光送入脑内。这项实验为小鼠进食回路提供了证据,却没有测试治疗人类食欲问题的方法。诺奖方法让科学家得以超越相关性:他们可以改变一组明确的细胞,再观察结果。

释义与用法

evidence 证据

evidence for / evidence that ...;不可数名词,可说 a piece of evidence。

move beyond correlation 超越相关性

correlation 是两件事一起变化;干预细胞后观察结果,能帮助检验因果关系。

一句话拆解

They can change a defined cell group and observe what happens next.

change A and observe B 概括干预实验的逻辑:先改变特定对象,再观察结果。defined 表示对象界定清楚。

KEEP THESE WORDS

本期重点表达


optogenetics 专业术语

光遗传学

常用搭配:use optogenetics / an optogenetics experiment

例句:Optogenetics lets researchers control selected cells with light.

用法:获奖的是一种研究方法,不能直接等同于治疗手段。

light-sensitive 复合词

对光敏感的

常用搭配:light-sensitive cells / be sensitive to light

例句:The protein made the cells light-sensitive.

用法:敏感对象由 to 引出;也可说 sensitive to noise。

responsive to 短语

对……有反应的

常用搭配:responsive to light / responsive to treatment

例句:The prepared neurons were responsive to blue light.

用法:侧重“受到刺激后有反应”,与 responsible for 不同。

control group 研究术语

对照组

常用搭配:compare with a control group / control mice

例句:The team compared stimulated mice with a control group.

用法:读实验报道时,先看实验组和对照组有什么差别。

pattern CEFR B2|模式义

模式;规律

常用搭配:a pattern of behaviour / a feeding pattern

例句:The two cell groups showed different patterns.

用法:与“图案”的 B1 义项不同;这里指事情发生的方式。

suppress CEFR C2|抑制义

抑制;压低

常用搭配:suppress appetite / suppress a response

例句:The second cell group suppressed food intake.

用法:与 encourage 形成对照;不要把“减少进食”写成“治愈肥胖”。

evidence CEFR B2|证据义

证据

常用搭配:evidence that ... / scientific evidence

例句:The mouse experiment provides evidence about feeding circuits.

用法:不可数名词;证据支持的范围要与实验对象一致。

correlation 统计术语

相关性

常用搭配:correlation between A and B / beyond correlation

例句:The experiment went beyond correlation by changing cells directly.

用法:相关性本身不能证明因果。

读懂研究

蓝光是实验工具,不是日常“控食欲”方法

2011 年的小鼠实验改变了特定神经元的活动,再观察进食量。研究对象是经过特殊处理的小鼠,且光被送入脑内;结果不能直接推到人类,更不能得出“照蓝灯就能减肥”的结论。

TRY IT YOURSELF

读后想一想

1. 诺贝尔奖的公布与小鼠进食实验分别发生在哪一年?

2. AgRP 和 POMC 两组神经元被刺激后,小鼠进食有何不同?时间尺度一样吗?

3. 为什么不能根据这项实验说“床头蓝灯能控制人的食欲”?

SAY IT IN ENGLISH

用一句话说清研究结论

Stimulating selected neurons changed how much mice ate, but the study did not test a treatment for human appetite.

资料依据:2026 年诺贝尔生理学或医学奖公告(卡罗林斯卡医学院);HHMI 小鼠进食实验报道;Aponte 等,《Nature Neuroscience》,2011,DOI: 10.1038/nn.2739。

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