title: Transition of serum alkaline phosphatase isoenzymes during liver regeneration in humans.
abstract: OBJECTIVE
  Serum alkaline phosphatase (ALP) levels tend to increase after hepatectomy. However, no previous examinations have yet focused on the relationship between liver regeneration and the individual ALP isoenzymes levels.
  
  
  METHODS
  Forty living liver transplantation donors who underwent hemi-hepatectomy were herein investigated. We evaluated the serum ALP levels and ALP isoenzyme levels preoperatively and postoperatively. The liver regeneration rate (LRR) was calculated using volumetry. According to the LRR, we divided the donors into two groups, consisting of a high regeneration group (HG) and a low regeneration group (LG).
  
  
  RESULTS
  The total serum ALP levels increased gradually after hepatectomy and peaked on postoperative day (POD) 14. ALP-1 was not detected in any donor preoperatively. However, it was detected after hepatectomy, peaking on POD 7. The serum ALP-2 level increased after hepatectomy, reaching a peak level on POD 14. The ALP-2 levels gradually increased after hepatectomy and reached peak levels on POD 14 in both groups. However, the ALP-2 level on POD 14 was significantly higher in HG than LG.
  
  
  CONCLUSIONS
  The serum ALP-2 levels after POD 14 might therefore be a useful indicator of favorable liver regeneration following hepatectomy, especially in patients who have a normal liver function.
authors.affiliation: Department of Surgery, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan.
authors.forename: Izumi
authors.initials: I
authors.lastname: Muraoka
authors.forename: Akihiko
authors.initials: A
authors.lastname: Soyama
authors.forename: Mitsuhisa
authors.initials: M
authors.lastname: Takatsuki
authors.forename: Tetsuo
authors.initials: T
authors.lastname: Tomonaga
authors.forename: Masaaki
authors.initials: M
authors.lastname: Hidaka
authors.forename: Takashi
authors.initials: T
authors.lastname: Kanematsu
authors.forename: Susumu
authors.initials: S
authors.lastname: Eguchi
mesh_terms: D000328:Adult; D000469:Alkaline Phosphatase / Q000097:blood*; D005260:Female; D006498:Hepatectomy; D006801:Humans; D007527:Isoenzymes / Q000097:blood*; D008115:Liver Regeneration; D016031:Liver Transplantation; D019520:Living Donors; D008297:Male; D008875:Middle Aged; D018709:Statistics, Nonparametric
chemical_list: D007527:Isoenzymes; D000469:Alkaline Phosphatase