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时间:2020-04-06
《工作狂要小心:压力太大会导致一夜白头!.doc》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、工作狂要小心:压力太大会导致一夜白头!Ifyou’reworriedaboutgoinggrey–trytorelax. Scientistshavefoundtoomuchstressreallydoesturnourhairwhite.如果你担心头发灰白——试着让自己放松。科学家们发现压力太大真的会让头发变白。Researchersdiscoveredthecellsthatgivehairitscolourdisappearwhenthebodyisexposedtostresshormones.Andunfortunatelyforthoseaffected,these‘co
2、lourful’cellsareunlikelytoreturn,leavingthehairgreyforgood.研究人员发现当身体处于压力荷尔蒙环境下,那些使头发着色的细胞就会消失。不幸的是,如果‘着色’细胞受到影响后就不可能再新陈代谢、恢复到从前的状态,所以头发就会永远变成灰白色的了。USscientistscarriedoutexperimentsonmicewhichshowedthestartlingeffectthatstresshasonourhair.Theybeganwiththepremisethat whenthehumanbodyisinjured,ste
3、mcellsresponsibleforproducingmelanin–thedarkpigmentthatprotectsusfromsunlight–movefromhairfolliclestotheskin,tohelplimitthedamage.Intheirtestsonmice,thesamepermanentdrainingofcolouroccurredwhentheanimalswereexposedtostresshormones.美国科学家在老鼠身上做了实验,结果显示压力对我们的头发的影响效果是惊人的。研究人员首先假设人体处于阳光暴晒的环境下,身体干细胞负
4、责生产黑色素,在阳光紫外线的照射下,黑色素会对我们有保护作用,毛囊中的黑色素沉淀到皮肤上,会起到减少皮肤伤害的作用。在他们对小白鼠做的实验中,当小白鼠处于压力荷尔蒙条件下,同样出现永久褪色的状态。Theresearcherssaidthiscouldexplainwhystresscanalsocausepigmentationwhichmakestheskinappeardarker.Mostofusspotourfirstgreyhairsaroundtheageof25,andeverythingfromgenestoalcoholandsmokinghavebeenblame
5、dforkickingofftheprocess.Therearetalesofpeoplegoinggreyovernightafterbereavementorshock.研究人员说,这可能会解释为什么压力也会导致色素沉着使皮肤显得更黑。我们大部分人大约在25岁会初次看到有了灰色头发,有多种因素导致我们出现白发,基因、吸烟、喝酒、压力等因素都会使头发变白。经历大的变故的人或经历丧亲之痛休克后,一夜之间头发就会变得灰白。DrMayumiItofromNewYorkUniversity,wholedthelateststudy,saidtherewasevidencethatstre
6、sscouldmakemelanin‘migrate’awayfromthehairfollicletotheskin.‘Wethoughtitwouldbeinterestingtospeculatethatexcessivestressmightpromotethismigrationtoomuch,’hesaid.Thestudy,whichwaspublishedinthejournalNatureMedicine,concludes:‘Stresshormonesareknowntopromoteskinpigmentation,yetparadoxicallyandane
7、cdotally,theyarebelievedtopromotehairgreying.‘Ourresultsmayprovideinsightintotherelationshipbetweenstresshormonesandhairgreying.’纽约大学麻由美-伊藤博士领导了这项最新研究,指出有证据表明压力会使毛囊中的黑色素‘沉淀’到皮肤上。我们原本认为压力过大黑色素沉淀过多这个说法是个很有意思的推测而已,’他说。该项研究发表在《自然医学》杂志
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