Growth-inhibitory effects of the ketone body, monoacetoacetin, on human gastric cancer cells with succinyl-CoA: 3-oxoacid CoA-transferase (SCOT) deficiency.
BACKGROUND
Monoacetoacetin (MAA) has been used experimentally as a physiological energy source in parenteral nutrition. Succinyl-CoA: 3-oxoacid CoA transferase (SCOT) is a key enzyme in the metabolism of MAA. In this study, the effect of MAA on the growth of human gastric cancer cells was examined in relation to SCOT expression.


METHODS
Four gastric cancer cell lines, OCUM-2M, MKN-28, MKN-45 and MKN-74, and two fibroblast cell lines were used in this study. The proliferation of gastric cancer cells was determined by MTT assay, by calculating the number of cancer cells, and by [3H]-thymidine uptake. Cells were cultured in DMEM containing 10% FBS with glucose (4.5 g/L) as the control or with MAA (4.5 g/L). SCOT mRNA expression was examined by RT-PCR.


RESULTS
The growth of OCUM-2M and MKN-28 cells was significantly suppressed in MAA medium compared with glucose medium. In contrast the growth of MKN-74, MKN-45 and normal fibroblasts was not suppressed in MAA medium. SCOT mRNA was expressed in MKN-45, MKN-74 and normal fibroblasts, but not in MKN-28 or OCUM-2M.


CONCLUSIONS
Parenteral nutrition with MAA may provide preferential energy for patients with some types of gastric cancer with SCOT deficiency.
Department of Surgical Oncology, Osaka City University Graduate School of Medicine, 1-4-3 Asahi-machi Abeno-ku, Osaka 545-8585, Japan.
Masamitsu
M
Sawai
Masakazu
M
Yashiro
Yukio
Y
Nishiguchi
Masaichi
M
Ohira
Kosei
K
Hirakawa
D000090:Acetoacetates / Q000494:pharmacology*; D002455:Cell Division / Q000187:drug effects; D045744:Cell Line, Tumor; D015256:Coenzyme A-Transferases / Q000096:biosynthesis / Q000172:deficiency* / Q000235:genetics; D005989:Glycerides / Q000494:pharmacology*; D006131:Growth Inhibitors / Q000494:pharmacology; D006801:Humans; D012333:RNA, Messenger / Q000096:biosynthesis / Q000235:genetics; D020133:Reverse Transcriptase Polymerase Chain Reaction; D013274:Stomach Neoplasms / Q000188:drug therapy* / Q000201:enzymology* / Q000235:genetics / Q000473:pathology
D000090:Acetoacetates; D005989:Glycerides; D006131:Growth Inhibitors; D012333:RNA, Messenger; C020417:monoacetoacetin; D015256:Coenzyme A-Transferases; C021460:3-ketoacid CoA-transferase