title: [Expression of three kinds of transcription factors in greater epithelial ridge cells of rat cochlear].
abstract: OBJECTIVE
  To detect the expression of Math1, Hes1 and Hes5 in greater epithelial ridge (GER) cells of rat cochlear and explore their influence on hair cell differentiation.
  
  
  METHODS
  Postnatal day 0 (P0), day 1 (P1) , day 3 (P3) day 4 (P4) and day 5 (P5) rat cochlear were dissected respectively and then pure GER cells were separated by a combinatorial approach of attachment and mechanical separation. The total RNA of GER cells was extracted by Trizol one step method and the expression of Math1, Hes1 and Hes5 in GER cells was detected with reverse transcription polymerase chain reaction.
  
  
  RESULTS
  Math1 was expressed in P0 - P5 rat GER cells and Hes1 was expressed only in PO - P3 rat GER cells, while there was no expression of Hes5 in P0 - P5 rat GER cells.
  
  
  CONCLUSIONS
  Probably only when the expression of Math1 reaches a certain level can it induce GER cells to differentiate into hair cells. Meanwhile this process might controlled by Hes1 to some extent.
authors.affiliation: Institute of Otorhinolaryngology, General Hospital of Chinese People's Liberation Army, Beijing 100853, China. zhaisq@plagh.com.cn
authors.forename: Yuan
authors.initials: Y
authors.lastname: Zhang
authors.forename: Yin-Yan
authors.initials: YY
authors.lastname: Hu
authors.forename: Wei
authors.initials: W
authors.lastname: Song
authors.forename: Wei-Wei
authors.initials: WW
authors.lastname: Guo
authors.forename: Suo-Qiang
authors.initials: SQ
authors.lastname: Zhai
mesh_terms: D000818:Animals; D051792:Basic Helix-Loop-Helix Proteins / Q000235:genetics / Q000378:metabolism*; D002454:Cell Differentiation; D003051:Cochlea / Q000166:cytology / Q000378:metabolism*; D004847:Epithelial Cells / Q000378:metabolism*; D018507:Gene Expression Regulation, Developmental; D006198:Hair Cells, Auditory / Q000166:cytology / Q000378:metabolism*; D018398:Homeodomain Proteins / Q000235:genetics / Q000378:metabolism*; D051381:Rats; D017207:Rats, Sprague-Dawley; D000072056:Transcription Factor HES-1
chemical_list: D051792:Basic Helix-Loop-Helix Proteins; D018398:Homeodomain Proteins; D000072056:Transcription Factor HES-1; C489735:Hes1 protein, rat; C078493:HES1 protein, human