短链脂肪酸（如丁酸）为什么被看作菌群的信使分子？
Why are short-chain fatty acids like butyrate seen as messenger molecules of the microbiota?
膳食纤维被菌群发酵产生丁酸等分子，它们既为肠细胞供能又调节免疫与炎症，是菌群影响全身健康的桥梁。
Fiber fermented by microbes yields butyrate that fuels colon cells and tunes immunity, bridging microbiota to whole-body health.
难度 专业 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Ed Yong,《I Contain Multitudes》Ecco/HarperCollins,2016;中译《我包罗万象》(郑李译),后浪丨北京联合出版公司,2019
Ed Yong, I Contain Multitudes, Ecco/HarperCollins, 2016; Chinese ed. (Zheng Li tr.), Beijing United Publishing (Houlang), 2019
#短链脂肪酸 #丁酸
微生物组研究为什么离不开宏基因组测序？
Why does microbiome research rely on metagenomic sequencing?
多数微生物无法在实验室单独培养，宏基因组直接对环境样本里的所有 DNA 测序，从而无偏地鉴定群落组成。
Most microbes can't be cultured; metagenomics sequences all DNA in a sample to profile communities without culturing each one.
难度 专业 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Ed Yong,《I Contain Multitudes》Ecco/HarperCollins,2016;中译《我包罗万象》(郑李译),后浪丨北京联合出版公司,2019
Ed Yong, I Contain Multitudes, Ecco/HarperCollins, 2016; Chinese ed. (Zheng Li tr.), Beijing United Publishing (Houlang), 2019
#宏基因组 #群落
肠道菌群是怎么影响大脑的（肠-脑轴）？
How can gut microbes influence the brain (the gut-brain axis)?
菌群通过神经递质、短链脂肪酸和迷走神经信号与中枢沟通，与情绪、压力甚至神经疾病都有关系。
Microbes communicate via neurotransmitters, short-chain fatty acids, and vagal signals, linking to mood, stress, and neurological disease.
难度 专业 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Ed Yong,《I Contain Multitudes》Ecco/HarperCollins,2016;中译《我包罗万象》(郑李译),后浪丨北京联合出版公司,2019
Ed Yong, I Contain Multitudes, Ecco/HarperCollins, 2016; Chinese ed. (Zheng Li tr.), Beijing United Publishing (Houlang), 2019
#肠脑轴 #菌群
剖腹产和顺产出生的宝宝，肠道菌群为什么从一开始就不一样？
Why do C-section and vaginal babies start life with different gut flora?
顺产宝宝经过产道，先“接种”到妈妈阴道和肠道的细菌；剖腹产先接触的是皮肤和医院环境菌。这种早期差异会影响免疫成熟，但后续喂养（尤其母乳）能逐步补回。
Vaginal-born babies first “catch” mom's vaginal and gut bacteria; C-section babies meet skin and hospital microbes first. The early difference shapes immune maturation, though later feeding (especially breastfeeding) helps catch up.
难度 进阶 · 适合 小学高段(9-12)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Ed Yong,《I Contain Multitudes》Ecco/HarperCollins,2016;中译《我包罗万象》(郑李译),后浪丨北京联合出版公司,2019
Ed Yong, I Contain Multitudes, Ecco/HarperCollins, 2016; Chinese ed. (Zheng Li tr.), Beijing United Publishing (Houlang), 2019
#剖腹产 #肠道菌群 #分娩
肠道菌群为什么能影响宿主对某些药物的代谢效果?
Why can gut microbes change how effectively a host metabolizes certain drugs?
肠道细菌携带的酶能直接化学修饰药物分子,例如有些菌株表达的β-葡萄糖醛酸苷酶会把肝脏结合后准备排出的药物重新切开,延长其在体内的停留。菌群还通过调节宿主肝酶表达间接改变代谢速度。因此同样剂量的药物在不同菌群构成的人体内可能呈现不同的血药浓度和副作用风险。
Bacterial enzymes can chemically modify drug molecules directly; for example some strains' beta-glucuronidases cleave drugs that the liver has already conjugated for excretion, prolonging their presence in the body. Microbes also act indirectly by tuning the expression of host liver enzymes. As a result, the same dose can yield different blood concentrations and side-effect risks in people with different microbiome compositions.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-11-03
来源 · Source
Science杂志综述Spanogiannopoulos等《The microbial pharmacists within us》(2016年353卷)
Spanogiannopoulos et al., "The microbial pharmacists within us," Science 353 (2016)
独立核验依据 · Independent verification: 核验依据 1 CROSSREF 标识 10.1038/nrmicro.2016.17：The microbial pharma
#微生物组 #药物代谢
人体消化酶处理不了的膳食纤维，肠道细菌是怎样从中获取能量的？
How do gut bacteria extract energy from dietary fiber that human digestive enzymes leave untouched?
人类基因组编码的碳水化合物活性酶数量有限，抗性淀粉和果胶等多糖得以完整抵达结肠。以拟杆菌属为代表的厌氧菌动用大量糖苷水解酶，把这些纤维发酵成乙酸、丙酸和丁酸等短链脂肪酸。其中丁酸为结肠上皮细胞供能，并参与调节宿主的免疫与代谢反应。
Human genomes encode only a handful of carbohydrate-active enzymes, so polysaccharides such as resistant starch and pectin reach the colon intact. Anaerobes like Bacteroides species deploy large repertoires of glycoside hydrolases that ferment these fibers into short-chain fatty acids, chiefly acetate, propionate and butyrate. Butyrate fuels colonic epithelial cells and helps regulate host immune and metabolic responses.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-11-02
来源 · Source
Sonnenburg, J.L. & Bäckhed, F.，《Diet-microbiota interactions as moderators of human metabolism》，载于《Nature》2016年第535卷第7610期，第56–64页。
Sonnenburg, J.L. & Backhed, F. (2016). Diet-microbiota interactions as moderators of human metabolism. Nature, 535(7610), 56-64.
独立核验依据 · Independent verification: 核验依据 1 CROSSREF 标识 10.1038/nature18846：Diet–microbiota interact
#肠道菌群 #短链脂肪酸
广谱抗生素清剿常驻菌群之后，艰难梭菌为何总能趁虚而入？
After broad-spectrum antibiotics wipe out resident bacteria, why does Clostridioides difficile so often move in?
多样的共生菌通过占据附着位点、消耗营养物质并产生次级胆汁酸等抑制性代谢物，共同构成定殖抗性。抗生素疗程瓦解了这道防线，幸存的艰难梭菌芽孢便可不受制约地萌发扩增。无论采用供体粪便移植还是配方菌剂，重建菌群都能恢复这道屏障并显著降低复发率。
Diverse commensals confer colonization resistance by occupying attachment sites, consuming nutrients and generating inhibitory metabolites such as secondary bile acids. Antibiotic courses dismantle these defenses, letting surviving C. difficile spores germinate and expand unchecked. Replenishing the community, whether through donor stool infusion or defined bacterial cocktails, restores the barrier and lowers recurrence rates.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-11-04
来源 · Source
Buffie, Pamer,《Microbiota-mediated colonization resistance against intestinal pathogens》,Nature Reviews Immunology,2013 (DOI: 10.1038/nri3535)
Buffie, Pamer, 'Microbiota-mediated colonization resistance against intestinal pathogens', Nature Reviews Immunology, 2013, DOI: 10.1038/nri3535
独立核验依据 · Independent verification: 核验依据 1 Crossref DOI 10.1038/nri3535
#定殖抗性 #艰难梭菌感染
把抑郁症患者的肠道菌群移植给无菌大鼠,为什么会诱发受体大鼠的抑郁样行为?
Why does transplanting gut microbiota from depressed patients into microbe-depleted rats trigger depressive-like behavior in the recipients?
因为菌群经由代谢物、免疫与迷走神经通路足以重塑宿主情绪回路。Kelly等将抑郁症患者粪便菌移植给无菌大鼠,受体出现快感缺失与焦虑样行为,色氨酸代谢向犬尿氨酸通路偏移,肠道通透性与炎症标志物同步升高,行为改变程度还与供体菌群组成相关;这说明微生物组是情绪表型的因果参与者而非旁观者,为益生菌与粪菌干预精神疾病提供了实验依据。
Microbes remodel host emotional circuitry through metabolites, immune signaling and the vagus nerve. Kelly and colleagues transferred fecal microbiota from depressed patients to germ-free rats; recipients developed anhedonia and anxiety-like behavior, tryptophan metabolism shifted toward the kynurenine pathway, gut permeability and inflammatory markers rose, and behavioral change tracked donor microbiota composition. The microbiome is therefore a causal participant in mood phenotypes rather than a bystander, grounding probiotic and fecal-transplant approaches to psychiatric care.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-11-02
来源 · Source
Kelly JR等论文《Transferring the blues: Depression-associated gut microbiota induces neurobehavioural changes in the rat》,Journal of Psychiatric Research 2016(科克大学APC微生物组研究所)
Kelly JR et al., 'Transferring the blues: Depression-associated gut microbiota induces neurobehavioural changes in the rat', Journal of Psychiatric Research, 2016 (APC Microbiome Institute, University College Cork)
独立核验依据 · Independent verification: 核验依据 1 EUROPEPMC 标识 27491067：Transferring the blues: Depression
#肠脑轴 #粪菌移植 #色氨酸代谢
肠道内分泌细胞为什么会像神经元一样,通过突触把营养信号直接传给迷走神经?
Why do intestinal endocrine cells pass nutrient signals straight to the vagus nerve through synapses, just as neurons do?
因为一类名为神经足细胞的肠内分泌细胞自带突触装置。Kaelberer等借助狂犬病病毒跨突触示踪,在小鼠回肠与结肠找到与迷走神经节神经元形成化学突触的neuropod细胞,它们感知糖和氨基酸后释放谷氨酸,毫秒级地把信号送抵脑干;这修正了肠内分泌细胞只靠激素缓慢起作用的认识,也解释了肠道为何能瞬时分辨营养物并左右食欲与食物偏好。
Because a subset of enteroendocrine cells called neuropod cells carries its own synaptic machinery. Using rabies-virus transsynaptic tracing, Kaelberer and colleagues found neuropod cells in mouse ileum and colon wired through chemical synapses to vagal ganglion neurons; after sensing sugars and amino acids they release glutamate and relay signals to the brainstem within milliseconds. This overturns the view that enteroendocrine cells work only slowly through hormones and explains how the gut instantly discriminates nutrients to steer appetite and food preference.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-11-02
来源 · Source
Kaelberer MM等论文《A gut-brain neural circuit for nutrient sensory transduction》,Science 2018(杜克大学医学院Bohórquez实验室)
Kaelberer MM et al., 'A gut-brain neural circuit for nutrient sensory transduction', Science, 2018 (Bohórquez lab, Duke University School of Medicine)
独立核验依据 · Independent verification: 核验依据 1 EUROPEPMC 标识 30237325：A gut-brain neural circuit for nut
#肠内分泌细胞 #迷走神经 #突触传递
妈妈亲吻宝宝，除了表达爱，为什么也算在给宝宝“接种”细菌？
Beyond love, why is a mother's kiss also “vaccinating” her baby with bacteria?
妈妈口腔和皮肤的细菌会通过亲吻、喂养传到宝宝身上，帮宝宝早早建立多样化的菌群，相当于用最温柔的方式“播种”好菌，训练免疫系统学会分辨敌友。
Bacteria from a mother's mouth and skin pass to the baby through kisses and feeding, helping build diverse flora early—gently “seeding” good microbes that train the immune system to tell friend from foe.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Ed Yong,《I Contain Multitudes》Ecco/HarperCollins,2016;中译《我包罗万象》(郑李译),后浪丨北京联合出版公司,2019
Ed Yong, I Contain Multitudes, Ecco/HarperCollins, 2016; Chinese ed. (Zheng Li tr.), Beijing United Publishing (Houlang), 2019
#母婴 #菌群 #接种
感冒就吃抗生素，为什么可能让肚子里的“好细菌”也跟着遭殃？
Taking antibiotics for a cold—why might this also wipe out your “good” gut bacteria?
抗生素不分好坏，广谱药会连同有益菌一起杀灭，使菌群多样性下降、出现腹泻或念珠菌增多。更糟的是滥用会催生耐药菌。所以不该对病毒感冒滥用抗生素。
Antibiotics don't pick sides; broad-spectrum drugs kill beneficial strains too, cutting diversity and causing diarrhea or yeast overgrowth. Worse, misuse breeds resistance. That's why antibiotics shouldn't be abused for viral colds.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Ed Yong,《I Contain Multitudes》Ecco/HarperCollins,2016;中译《我包罗万象》(郑李译),后浪丨北京联合出版公司,2019
Ed Yong, I Contain Multitudes, Ecco/HarperCollins, 2016; Chinese ed. (Zheng Li tr.), Beijing United Publishing (Houlang), 2019
#抗生素 #菌群 #耐药
每个人肚子里都住着上万亿细菌，它们到底是在帮我们，还是在害我们？
Trillions of bacteria live in every human gut—are they helping or harming us?
多数是“好房客”：帮分解膳食纤维、合成维生素K和B族、训练免疫系统、抑制坏菌。只有少数致病，且常在菌群失衡时才作乱。所以它们是搭档，不是敌人。
Mostly good tenants: they break down fiber, make vitamins K and B, train the immune system and crowd out pathogens. Only a few cause disease, usually when the community is unbalanced. They're partners, not enemies.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Ed Yong,《I Contain Multitudes》Ecco/HarperCollins,2016;中译《我包罗万象》(郑李译),后浪丨北京联合出版公司,2019
Ed Yong, I Contain Multitudes, Ecco/HarperCollins, 2016; Chinese ed. (Zheng Li tr.), Beijing United Publishing (Houlang), 2019
#肠道菌群 #益生菌 #免疫
粪便微生物移植（FMT）是用来治什么病的？
What is fecal microbiota transplantation (FMT) used for?
FMT 把健康捐赠者的肠道菌群转入患者肠道，对反复发作的艰难梭菌感染有很高的治愈率。
FMT transfers healthy donor gut microbes to a patient and cures most recurrent Clostridioides difficile infections.
难度 入门 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Ed Yong,《I Contain Multitudes》Ecco/HarperCollins,2016;中译《我包罗万象》(郑李译),后浪丨北京联合出版公司,2019
Ed Yong, I Contain Multitudes, Ecco/HarperCollins, 2016; Chinese ed. (Zheng Li tr.), Beijing United Publishing (Houlang), 2019
#粪菌移植 #艰难梭菌
人体里的微生物主要住在哪些地方？
Where in the body do human microbes mainly live?
肠道菌群最丰富，此外皮肤、口腔、呼吸道和生殖道也各有独特的微生物群落，总数以万亿计。
The gut is richest, but skin, mouth, airways, and urogenital tracts each host distinct communities of trillions of microbes.
难度 入门 · 适合 小学低段(6-8)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Ed Yong,《I Contain Multitudes》Ecco/HarperCollins,2016;中译《我包罗万象》(郑李译),后浪丨北京联合出版公司,2019
Ed Yong, I Contain Multitudes, Ecco/HarperCollins, 2016; Chinese ed. (Zheng Li tr.), Beijing United Publishing (Houlang), 2019
#微生物组 #肠道菌群
多吃蔬菜水果为什么对肠道菌群好？
Why are vegetables and fruit good for gut bacteria?
膳食纤维是许多有益菌的食物，它们发酵纤维产生短链脂肪酸，既能养肠细胞又帮着抗炎。
Dietary fiber feeds many beneficial bacteria that ferment it into short-chain fatty acids, nourishing colon cells and reducing inflammation.
难度 入门 · 适合 幼儿(3-6)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Ed Yong,《I Contain Multitudes》Ecco/HarperCollins,2016;中译《我包罗万象》(郑李译),后浪丨北京联合出版公司,2019
Ed Yong, I Contain Multitudes, Ecco/HarperCollins, 2016; Chinese ed. (Zheng Li tr.), Beijing United Publishing (Houlang), 2019
#膳食纤维 #肠道菌群
酸奶、泡菜里的活细菌，喝进肚子里以后还活着吗，会不会被胃酸杀死？
Do the live bacteria in yogurt and kimchi survive the trip into your stomach, or die in acid?
一部分能活。许多乳酸菌有耐酸本领，裹在食物里更难被胃酸全灭，到达肠道后能帮助维持菌群平衡。不过数量有限，不能指望它们“包治百病”。
Some survive. Many lactobacteria resist acid and ride through inside food, reaching the gut to help balance flora. But numbers are limited—don't expect them to cure everything.
难度 入门 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Ed Yong,《I Contain Multitudes》Ecco/HarperCollins,2016;中译《我包罗万象》(郑李译),后浪丨北京联合出版公司,2019
Ed Yong, I Contain Multitudes, Ecco/HarperCollins, 2016; Chinese ed. (Zheng Li tr.), Beijing United Publishing (Houlang), 2019
#乳酸菌 #耐酸 #肠道
妈妈总说“手别洗得太干净”，皮肤上也住着对我们好的细菌吗？
Moms say “don't over-wash your hands”—do helpful bacteria live on our skin too?
有！皮肤表面住着许多正常菌群，像一层“活护盾”占着位置、挡住致病菌，还能帮调节免疫。适度清洁就好，洗得太狠反而把好菌也冲走，更容易生病。
Yes! Normal skin flora form a “living shield”, occupying space to block pathogens and tuning immunity. Clean reasonably; over-scrubbing washes away the good guys and invites illness.
难度 入门 · 适合 幼儿(3-6)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Ed Yong,《I Contain Multitudes》Ecco/HarperCollins,2016;中译《我包罗万象》(郑李译),后浪丨北京联合出版公司,2019
Ed Yong, I Contain Multitudes, Ecco/HarperCollins, 2016; Chinese ed. (Zheng Li tr.), Beijing United Publishing (Houlang), 2019
#皮肤菌群 #免疫 #清洁