Replacement therapy with nitric oxide or nitric oxide dornor in vivo, maintains the bone mass in rats after ovariectomy

1996 ◽  
Vol 6 (S1) ◽  
pp. 272-272
Author(s):  
S. J. Wimalawansa ◽  
P. R. Gangula ◽  
G. De Marco ◽  
C. Yallampalli
1996 ◽  
Vol 270 (5) ◽  
pp. E840-E845 ◽  
Author(s):  
H. Tsukahara ◽  
M. Miura ◽  
S. Tsuchida ◽  
I. Hata ◽  
K. Hata ◽  
...  

We examined the effects of chronic nitric oxide (NO) blockade on bone mineral status in growing rats. Oral administration of NG-nitro-L-arginine methyl ester (L-NAME) for 4 wk caused hypertension and a significant reduction in urinary NO2- and NO3- excretion. Four-week oral aminoguanidine (AG, 400 mg/dl of drinking water) did not alter blood pressure but caused a significant decrease in urinary NO2- and NO3-. Rats treated with L-NAME at doses of 20 and 50 mg/dl had normal bone mineral mass in the lumbar spine, but the highest dose (80 mg/dl) caused a slight decrease in bone mass. Chronic AG induced a significant spine osteopenia. This effect of AG was abolished by the simultaneous administration of L-arginine (2.0 g/dl). AG-induced osteopenia was associated with a significant increase in urine excretion of collagen cross-links with normal serum osteocalcin. These findings indicate that chronic AG administration can cause an imbalance between bone resorption and formation, resulting in a decrease in bone mass in growing rats, and suggest that NO produced by inducible NO synthase plays an important role in basal osteoclast bone degradation activity in vivo.


1979 ◽  
Vol 42 (02) ◽  
pp. 813-814 ◽  
Author(s):  
Guido Grignani ◽  
Gabriella Gamba ◽  
Edoardo Ascari

Circulation ◽  
1995 ◽  
Vol 91 (5) ◽  
pp. 1314-1319 ◽  
Author(s):  
Robinson Joannides ◽  
Walter E. Haefeli ◽  
Lilly Linder ◽  
Vincent Richard ◽  
El Hassan Bakkali ◽  
...  
Keyword(s):  

Circulation ◽  
1995 ◽  
Vol 92 (7) ◽  
pp. 1876-1882 ◽  
Author(s):  
Alexander Mülsch ◽  
Peter Mordvintcev ◽  
Eberhard Bassenge ◽  
Frank Jung ◽  
Bernd Clement ◽  
...  

Circulation ◽  
1997 ◽  
Vol 96 (9) ◽  
pp. 3104-3111 ◽  
Author(s):  
Yoshihiro Fukumoto ◽  
Hiroaki Shimokawa ◽  
Toshiyuki Kozai ◽  
Toshiaki Kadokami ◽  
Kouichi Kuwata ◽  
...  

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