OKADAIC ACID STIMULATES CARNITINE PALMITOYLTRANSFERASE-I ACTIVITY AND PALMITATE OXIDATION IN ISOLATED RAT HEPATOCYTES

被引:21
作者
GUZMAN, M [1 ]
CASTRO, J [1 ]
机构
[1] COMPLUTENSE UNIV MADRID,FAC CHEM,DEPT BIOCHEM & MOLEC BIOL 1,E-28040 MADRID,SPAIN
关键词
OKADAIC ACID; FATTY ACID OXIDATION; CARNITINE PALMITOYLTRANSFERASE-I; HEPATOCYTE;
D O I
10.1016/0014-5793(91)81114-N
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Okadaic acid increased in parallel with carnitine palmitoyltransferase I activity and the rate of palmitate oxidation in isolated rat hepatocytes. Nevertheless, okadaic acid had no significant effect on the rate of octanoate oxidation. Maximal effects of okadaic acid were similar and non-additive to those of dibutyryl-cAMP, forskolin and glucagon. Results indicate that carnitine palmitoyltransferase I activity may be controlled by a mechanism of phosphorylation/dephosphorylation.
引用
收藏
页码:105 / 108
页数:4
相关论文
共 24 条
[1]   OPPOSITE EFFECTS OF INSULIN AND GLUCAGON IN ACUTE HORMONAL-CONTROL OF HEPATIC LIPOGENESIS [J].
BEYNEN, AC ;
VAARTJES, WJ ;
GEELEN, MJH .
DIABETES, 1979, 28 (09) :828-835
[2]   CARNITINE [J].
BIEBER, LL .
ANNUAL REVIEW OF BIOCHEMISTRY, 1988, 57 :261-283
[3]   MEASUREMENT OF ACETYL-COA CARBOXYLASE ACTIVITY IN ISOLATED HEPATOCYTES [J].
BIJLEVELD, C ;
GEELEN, MJH .
BIOCHIMICA ET BIOPHYSICA ACTA, 1987, 918 (03) :274-283
[4]   ZONATION OF GLYCOGEN AND GLUCOSE SYNTHESES, BUT NOT GLYCOLYSIS, IN RAT-LIVER [J].
CHEN, KS ;
KATZ, J .
BIOCHEMICAL JOURNAL, 1988, 255 (01) :99-104
[5]   THE STRUCTURE AND REGULATION OF PROTEIN PHOSPHATASES [J].
COHEN, P .
ANNUAL REVIEW OF BIOCHEMISTRY, 1989, 58 :453-508
[6]   OKADAIC ACID - A NEW PROBE FOR THE STUDY OF CELLULAR-REGULATION [J].
COHEN, P ;
HOLMES, CFB ;
TSUKITANI, Y .
TRENDS IN BIOCHEMICAL SCIENCES, 1990, 15 (03) :98-102
[7]  
COOK GA, 1987, J BIOL CHEM, V262, P2050
[8]   L-CARNITINE ACYLTRANSFERASE IN INTACT PEROXISOMES IS INHIBITED BY MALONYL-COA [J].
DERRICK, JP ;
RAMSAY, RR .
BIOCHEMICAL JOURNAL, 1989, 262 (03) :801-806
[9]   SIMULTANEOUS STIMULATION OF FATTY-ACID SYNTHESIS AND OXIDATION IN RAT HEPATOCYTES BY VANADATE [J].
GUZMAN, M ;
CASTRO, J .
ARCHIVES OF BIOCHEMISTRY AND BIOPHYSICS, 1990, 283 (01) :90-95
[10]   SHORT-TERM REGULATION OF CARNITINE PALMITOYLTRANSFERASE ACTIVITY IN ISOLATED RAT HEPATOCYTES [J].
GUZMAN, M ;
GEELEN, MJH .
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS, 1988, 151 (02) :781-787