SCI
29July
Persistenceofaregeneration-associated,transitionalalveolarepithelialcellstateinpulmonaryfibrosis
KobayashiY,TataA,KonkimallaA,etal.Persistenceofaregeneration-associated,transitionalalveolarepithelialcellstateinpulmonaryfibrosis[publishedonlineaheadofprint,Jul13].NatCellBiol.;10./s---8.doi:10./s---8
CorrespondenceandrequestsformaterialsshouldbeaddressedtoP.R.T.e-mail:purushothamarao.tata
duke.eduStemcellsundergodynamicchangesinresponsetoinjurytoregeneratelostcells.However,theidentityoftransitionalstatesandthemechanismsthatdrivetheirtrajectoriesremainunderstudied.Usinglungorganoids,multipleinvivorepairmodels,single-celltranscriptomicsandlineagetracing,wefindthatalveolartype-2epithelialcellsundergoingdifferentiationintotype-1cellsacquirepre-alveolartype-1transitionalcellstate(PATS)enroutetoterminalmaturation.Transitionalcellsundergoextensivestretchingduringdifferentiation,makingthemvulnerabletoDNAdamage.CellsinthePATSshowanenrichmentofTP53,TGF¦Â,DNA-damage-responsesignallingandcellularsenescence.GainandlossoffunctionaswellasgenomicbindingassaysrevealedadirecttranscriptionalcontrolofPATSbyTP53signalling.Notably,accumulationofPATS-likecellsinhumanfibroticlungswasobserved,suggestingpersistenceofthetransitionalstateinfibrosis.Ourstudythusimplicatesatransientstateassociatedwithsenescenceinnormalepithelialtissuerepairanditsabnormalpersistenceindiseaseconditions.
¸Éϸ°û¾ÀúÁ˶¯Ì¬µÄ±ä»¯¹ý³Ì£¬ÒÔ»ØÓ¦ËðÉË£¬ÔÙÉúʧȥµÄϸ°û¡£È»¶ø£¬×ª±ä½×¶ÎµÄʶ±ð£¬ÒÔ¼°Çý¶¯×ª±äµÄ»úÖÆÄ¿Ç°ÉÐδ֪Ïþ¡£²ÉÓ÷ÎÀàÆ÷¹Ù£¬¶àÖÖÌåÄÚÐÞ¸´Ä£ÐÍ£¬µ¥Ï¸°ûת¼×éѧºÍÆ×ϵ׷×Ù£¬ÎÒÃÇ·¢ÏÖIIÐÍ·ÎÅÝÉÏÆ¤Ï¸°ûÔÚ×ßÏò×îÖÕ³ÉÊìµÄ¹ý³ÌÖУ¬¾ÀúÁËÏòIÐÍϸ°ûµÄ·Ö»¯£¬»ñµÃÁËǰ·ÎÅÝIÐÍÒÆÐÐϸ°û״̬(PATS)¡£ÒÆÐÐϸ°ûÔÚ·Ö»¯¹ý³ÌÖоÀúÁ˹㷺µÄÑÓÉ죬ʹËûÃǶÔDNAËðÉËÃô¸Ð¡£PATSµÄϸ°û¸»º¬TP53,TGF¦Â£¬DNAËðÉË·´Ó¦ÐźÅÒÔ¼°Ï¸°ûË¥ÀÏ¡£»ñµÃºÍʧȥ¹¦ÄÜÒÔ¼°»ùÒò×é½áºÏÊÔÑé½ÒʾÁËͨ¹ýTP53ÐźſØÖƵÄPATSµÄÖ±½Óת¼¿ØÖÆ¡£ÓÈÆäÊÇ£¬ÔÚÈËÀàÏËά»¯·ÎÖУ¬´óÁ¿PATSÑùϸ°û±»·¢ÏÖ£¬ÕâÒâζ×ÅÔÚ·ÎÏËά»¯ÖÐÓгÖÐøµÄÒÆÐÐ״̬¡£ÎÒÃǵÄÑо¿Ö¤ÊµÁËÔÚÕý³£ÉÏÆ¤×éÖ¯ÐÞ¸´ÖÐÓÐÓëË¥ÀÏÏà¹ØµÄÒ»ÖÖ¶ÌÔÝ״̬ÒÔ¼°ÔÚ¼²²¡×´Ì¬ÏµÄÒì³£³ÖÐø×´Ì¬¡£
ϲ»¶SCIÌìÌì¶ÁµÄÀíÓÉ
ÅãÄúÒ»ÆðѧϰSCIҽѧÂÛÎÄ
ÿÌì5·ÖÖÓ£¬ÈÃ×Ô¼ºµÄÓ¢ÓïÅ£±ÆÆðÀ´
ÌØÊ⸣ÀûÈÃÄú¾ªÏ²Á¬Á¬
µã»÷ÔĶÁÔÎÄ»òÏ·½Á´½Ó£¬¼´¿ÉÏÂÔØSCIÔÎÄÁ´½Ó£º
×ªÔØÇë×¢Ã÷µØÖ·:http://www.qwhcm.com/zcmbyy/2205280.html