title: Prolactin (PRL) reduces the release of transaminases from the isolated pig liver.
abstract: BACKGROUND
  This study investigated methods of increasing the effectiveness of preservation solutions. Recently, it has been reported that solution effectiveness can be improved by the addition of prolactin (PRL). This study determines the effect of prolactin (PRL) on the amount and release rate of alanine aminotransferase (ALAT) and aspartate aminotransferase (AST) from liver during its 24-hour preservation period.
  
  
  METHODS
  Isolated porcine liver was kept in the HTK (histidine-tryptophan-ketoglutaric acid) solution with and without PRL. Once infusion and the 24-hour preservation period had been finished, samples of the preservation solution were taken and the amounts of released indicator enzymes were determined.
  
  
  RESULTS
  Aminotransferases were released from hepatocytes to the preservation solution at various rates. ALT was released much faster into the solution without PRL (k=-0.1230 [U/l/h-1]) and slower with PRL (k=-0.0895 [U/l/h-1]). The enzyme was released into the solution with PRL at a 27% slower rate. Similar results were obtained when the release rate of AST was analyzed. AST was more quickly released into the solution without PRL (k=-0.0642 [U/l/h-1]), and more slowly with PRL (k=-0.0205 [U/l/h-1]). The enzyme was released into the PRL-containing solution at a 68% slower rate.
  
  
  CONCLUSIONS
  The obtained results indicate that the addition of PRL significantly lowers the amount of aminotransferases released from hepatocytes and also lessens their release rate, as it significantly affects the time of efficient in vitro storage of the liver.
authors.affiliation: "Biochefa" Pharmaceutical Research and Production Plant, Sosnowiec, Poland. b.dolinska@biochefa.pl
authors.forename: Barbara
authors.initials: B
authors.lastname: Dolinska
authors.forename: Grzegorz
authors.initials: G
authors.lastname: Budzinski
authors.forename: Artur
authors.initials: A
authors.lastname: Caban
authors.forename: Aneta
authors.initials: A
authors.lastname: Ostrozka-Cieslik
authors.forename: Grzegorz
authors.initials: G
authors.lastname: Oczkowicz
authors.forename: Lech
authors.initials: L
authors.lastname: Cierpka
authors.forename: Florian
authors.initials: F
authors.lastname: Ryszka
mesh_terms: D000410:Alanine Transaminase / Q000378:metabolism*; D000818:Animals; D001219:Aspartate Aminotransferases / Q000378:metabolism*; D008099:Liver / Q000187:drug effects* / Q000201:enzymology / Q000378:metabolism; D009926:Organ Preservation / Q000379:methods; D019188:Organ Preservation Solutions / Q000494:pharmacology*; D011388:Prolactin / Q000494:pharmacology*; D013552:Swine
chemical_list: D019188:Organ Preservation Solutions; D011388:Prolactin; D001219:Aspartate Aminotransferases; D000410:Alanine Transaminase