title: Serum lysophospholipase D/autotaxin may be a new nutritional assessment marker: study on prostate cancer patients.
abstract: BACKGROUND
  It is now established that the bioactive lipid lysophosphatidic acid (LPA) contributes to cancer initiation, progression and metastasis, including those of prostate cancer. LPA is produced in the serum and plasma mainly by conversion from lysophospholipids through the action of lysophospholipase D (lysoPLD), which is identical to the soluble form of autotaxin (ATX) originally isolated as a tumour cell motility-stimulating factor. In this study, we evaluated the usefulness of lysoPLD/ATX activity as a diagnostic marker.
  
  
  METHODS
  The serum lysoPLD activity, assessed by measuring choline liberation from the substrate lysophosphatidylcholine, was measured in patients with prostate cancer and compared with the concentrations of prostate-specific antigen (PSA) and conventional nutritional assessment markers.
  
  
  RESULTS
  The serum lysoPLD activity in prostate cancer patients was not statistically different from that in the controls. Consistent with this, there was no correlation between the serum lysoPLD activity and the serum PSA concentrations. However, the lysoPLD/ATX activity did decrease after operation in the prostate cancer patients and seemed to reflect the postoperative damage or the nutritional status.
  
  
  CONCLUSIONS
  We postulate that while the serum lysoPLD/ATX may not be a marker of prostate cancer, it promises to instead be a new marker of nutritional status.
authors.affiliation: Department of Clinical Laboratory, The University of Tokyo Hospital, Tokyo, Japan.
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Nakamura
authors.forename: Takumi
authors.initials: T
authors.lastname: Takeuchi
authors.forename: Ryunosuke
authors.initials: R
authors.lastname: Ohkawa
authors.forename: Shigeo
authors.initials: S
authors.lastname: Okubo
authors.forename: Hiromitsu
authors.initials: H
authors.lastname: Yokota
authors.forename: Minoru
authors.initials: M
authors.lastname: Tozuka
authors.forename: Junken
authors.initials: J
authors.lastname: Aoki
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Arai
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Ikeda
authors.forename: Noriko
authors.initials: N
authors.lastname: Ohshima
authors.forename: Tadaichi
authors.initials: T
authors.lastname: Kitamura
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Yatomi
mesh_terms: D014408:Biomarkers, Tumor / Q000032:analysis / Q000097:blood*; D006454:Hemoglobins / Q000032:analysis; D006801:Humans; D008297:Male; D009097:Multienzyme Complexes / Q000032:analysis / Q000097:blood*; D015596:Nutrition Assessment; D009748:Nutrition Disorders / Q000097:blood / Q000175:diagnosis* / Q000209:etiology; D043264:Phosphodiesterase I / Q000032:analysis / Q000097:blood*; D010727:Phosphoric Diester Hydrolases / Q000032:analysis / Q000097:blood*; D011228:Prealbumin / Q000032:analysis; D017430:Prostate-Specific Antigen / Q000097:blood; D011471:Prostatic Neoplasms / Q000097:blood* / Q000150:complications; D011755:Pyrophosphatases / Q000032:analysis / Q000097:blood*; D012709:Serum Albumin / Q000032:analysis; D013997:Time Factors; D000099189:Lysophospholipase D
chemical_list: D014408:Biomarkers, Tumor; D006454:Hemoglobins; D009097:Multienzyme Complexes; D043264:Phosphodiesterase I; D010727:Phosphoric Diester Hydrolases; D011228:Prealbumin; D017430:Prostate-Specific Antigen; D011755:Pyrophosphatases; D012709:Serum Albumin; D000099189:Lysophospholipase D