title: Rat prostate explants in serum-free organ culture: a comparison of two media and gas mixtures.
abstract: BACKGROUND
  Urologists are looking for a way to easily discriminate between aggressive and very slow-growing prostate tumors. A sound way to appreciate such developing activities would be to identify an appropriate cell marker in prostate explants maintained in a defined culture system.
  
  
  METHODS
  Different biological parameters were compared in rat prostate explants cultured for 5 days in rich CMRL or basic Leibovitz's L-15 medium, unsupplemented with serum, under a mixture of either 95% air/5% CO2 or 50% N2/45% O2/5% CO2.
  
  
  RESULTS
  DNA synthesis was somewhat similar with the two-gas combination, but was higher in explants maintained in L-15 medium than in CMRL. Hence, L-15 medium and the 95% air/5% CO2 mixture were selected. Under these defined conditions for 5 days, cells were still able to synthesize DNA and proteins while preserving their morphological integrity and maintaining alkaline and acid phosphatase activities.
  
  
  CONCLUSIONS
  Since the present culture system works well in a controlled environment and under such minimal conditions, it appears to be a reliable and promising model that will provide basic data and allow the study of hormones and growth factors involved in prostatic tissue growth. It might eventually permit the identification of a cell marker.
authors.affiliation: Département d'Anatomie et de Biologie Cellulaire, Faculté de Médecine, Université de Sherbrooke, Québec, Canada.
authors.forename: X K
authors.initials: XK
authors.lastname: Nguyen-Le
authors.forename: J
authors.initials: J
authors.lastname: Corcos
authors.forename: N
authors.initials: N
authors.lastname: Brière
mesh_terms: D000135:Acid Phosphatase / Q000378:metabolism; D000469:Alkaline Phosphatase / Q000378:metabolism; D000818:Animals; D016895:Culture Media, Serum-Free; D004247:DNA / Q000032:analysis; D008297:Male; D009584:Nitrogen; D010100:Oxygen; D011467:Prostate / Q000033:anatomy & histology* / Q000201:enzymology / Q000378:metabolism*; D051381:Rats; D017208:Rats, Wistar; D013997:Time Factors
chemical_list: D016895:Culture Media, Serum-Free; D004247:DNA; D000469:Alkaline Phosphatase; D000135:Acid Phosphatase; D009584:Nitrogen; D010100:Oxygen