Evaluation of functional recovery of regenerating rat liver after partial hepatectomy using 31P-NMR spectroscopy.
Using 31P-NMR spectroscopy, we studied the process of the functional recovery of the regenerating rat liver at 1-5 weeks after a 65% partial hepatectomy from the viewpoint of phosphate metabolism. Portal vein clamping (20 min) or fructose administration (250 mg/kg body weight) was performed to temporarily reduce adenosine triphosphate (ATP) content in the remnant liver. Changes in ATP level were observed for 60 min after declamping the portal vein or after fructose administration. Significant differences in the increased ATP levels after declamping the portal vein or after fructose administration were observed in each hepatectomized group. Until 3 weeks after hepatectomy, ATP levels during 60 min after declamping the portal vein or after fructose administration were significantly lower than those in the nonresected control rats. However, the increase in ATP in the 4-week group was almost identical to the increase in the control group throughout the 60 min. Remnant liver weight already returned to the nonresected control level 1 week after hepatectomy, and remained constant thereafter. On the other hand, the final ATP levels 60 min after declamping the portal vein or after fructose administration returned to the nonresected control level only after 4 weeks following hepatectomy. These results demonstrate that from the viewpoint of ATP synthesis, functional recovery of the regenerating liver to normal can be observed within 4 weeks after partial hepatectomy.
Nishida
Y
Y
Second Department of Surgery, Asahikawa Medical College, Japan.
Tanaka
K
K
Munakata
T
T
Kasai
S
S
D000255:Adenosine Triphosphate / Q000032:analysis / Q000378:metabolism*; D000818:Animals; D006498:Hepatectomy; D008099:Liver / Q000378:metabolism*; D008115:Liver Regeneration; D009682:Magnetic Resonance Spectroscopy; D008297:Male; D010710:Phosphates / Q000378:metabolism; D051381:Rats; D017208:Rats, Wistar
D010710:Phosphates; D000255:Adenosine Triphosphate