
TY  - JOUR
A1  - Jawerbaum, Alicia 
A1  - Gonzalez, Elida T. 
A1  - Novaro, Virginia 
A1  - Faletti, Alicia 
A1  - Gimeno, Martha A. F. 
T1  - Nitric oxide mediates increased prostaglandin E production by oocyte&#8211;cumulus complexes in the non-insulin-dependent diabetic rat
JF  - Reproduction, Fertility and Development
JO  - Reprod. Fertil. Dev.
Y1  - 1998
VL  - 10
IS  - 2
SP  - 185
EP  - 190
KW  - 
UR  - https://doi.org/10.1071/R97069 
N2  - Previous work described an increase in prostaglandin E (PGE) production by oocyte&#8211;cumulus complexes (OVA) obtained from non-insulin-dependent diabetic rats. More recently, it has been found that in control OVA nitric oxide (NO) mediates hCG-induced PGE secretion. To determine whether increases in PGE secretion by diabetic OVA are mediated by NO, the present study has evaluated the secretion of PGE by diabetic OVA, cultured in the absence or presence of hCG, NO donors (sodium nitroprusside (NP) and 3-morpholino-sydnonimine-hydrochloride (SIN&#8211;1)), and a NO synthase inhibitor (NG monomethyl-L-arginine; L-NMMA). hCG, NP and SIN&#8211;1 increased PGE secretion by diabetic OVA. L-NMMA did not modify basal secretion of PGE by control OVA but lowered PGE production in diabetic OVA to control values. L-NMMA prevented the hCG-induced PGE accumulation in control and diabetic OVA, and the quantities of PGE produced were similar to those of control OVA but lower than in diabetic OVA incubated in the absence of hCG. The effect of L-NMMA seems to be specific since NG monomethyl-D-arginine had no effect. NO synthase activity was higher in diabetic ovaries than in controls. The present results suggest that NO mediates the increased PGE production by diabetic OVA, probably a result of overproduction of NO. 
ER  -

