title: [Effects of polychlorinated biphenyl on bcl-2 and TGFbeta1 expression in rat testes].
abstract: OBJECTIVE
  To study the effects of polychlorinated biphenyl (PCB) on bcl-2 and TGFbeta1 expression in rat testes.
  
  
  METHODS
  Forty male Wistar rats were divided into 4 groups at random: Group A (normal control), Group B (fed on 10(-8) mol/L PBC), Group C (feb on 10(-7) mol/L) and Group D (feb on 10(-6) mol/L). After three months, all the rats were killed, the animal model established, and observations made on the expression of bcl2 and TGFbeta1 in the rat testis using the optical microscope and immunohistochemical techniques.
  
  
  RESULTS
  The damage to the structure of the testis was related to the dosage of PCB: the higher the dodage, the more serious the damage. PCB induced the expression of bcl-2 and TGFbeta1. The TGFbeta1 expression was significantly higher in the highest dosage group than in others (P < 0.01 ), and the bcl-2 expression was dramatically higher in Group C than in other groups (P < 0.01).
  
  
  CONCLUSIONS
  PCB can cause injury in rat testes.
authors.affiliation: Department of Urology, Lanzhou General Hospital of Lanzhou Command, Lanzhou, Gansu 730050, China.
authors.forename: De-Hui
authors.initials: DH
authors.lastname: Chang
authors.forename: Hui
authors.initials: H
authors.lastname: Ma
authors.forename: Yin-Shu
authors.initials: YS
authors.lastname: Yang
authors.forename: Tian-Zhen
authors.initials: TZ
authors.lastname: Li
authors.forename: Hong-Bin
authors.initials: HB
authors.lastname: Zhao
mesh_terms: D000818:Animals; D004305:Dose-Response Relationship, Drug; D008297:Male; D011078:Polychlorinated Biphenyls / Q000633:toxicity*; D019253:Proto-Oncogene Proteins c-bcl-2 / Q000096:biosynthesis*; D011897:Random Allocation; D051381:Rats; D017208:Rats, Wistar; D013737:Testis / Q000187:drug effects* / Q000378:metabolism* / Q000473:pathology; D053773:Transforming Growth Factor beta1 / Q000096:biosynthesis*
chemical_list: D019253:Proto-Oncogene Proteins c-bcl-2; D053773:Transforming Growth Factor beta1; D011078:Polychlorinated Biphenyls