Vascular smooth muscle cell heme oxygenases generate guanylyl cyclase-stimulatory carbon monoxide
Christodoulides, N; Durante, W; Kroll, MH; Schafer, AI
HERO ID
76292
Reference Type
Journal Article
Year
1995
Language
English
PMID
| HERO ID | 76292 |
|---|---|
| In Press | No |
| Year | 1995 |
| Title | Vascular smooth muscle cell heme oxygenases generate guanylyl cyclase-stimulatory carbon monoxide |
| Authors | Christodoulides, N; Durante, W; Kroll, MH; Schafer, AI |
| Journal | Circulation |
| Volume | 91 |
| Issue | 9 |
| Page Numbers | 2306-2309 |
| Abstract | VA Merit Review grants; National Institutes of Health frants HL-36045 and HL-02311; American Heart Association, Texas Affiliate. #Background Carbon monoxide (CO), like nitric oxide (NO), stimulates soluble guanylyl cyclase and thereby raises intracellular levels of cGMP. We examined the endogenous capacity of vascular smooth muscle cells (SMCs) to produce CO from heme through the activity of heme oxygenases. Methods and Results Cultured SMCs from rat aorta (RASMCs) expressed immunoreactive inducible heme oxygenase-1 (HO-1) and constitutive HO-2. Treatment of RASMCs with hemin and sodium arsenite, which are inducers of HO-1, stimulated RASMC cGMP without stimulating nitrite release or inducible NO synthase expression, and the induced elevations of cGMP were not inhibited by the NO synthase inhibitor NG-methyl-L-arginine. Induced CO from RASMCs likewise caused elevation of cGMP levels in platelets coincubated with the vascular cells. Zinc protoporphyrin IX, an inhibitor of HO, reversed the inducible increases in platelet cGMP. Conclusions These results indicate that vascular SMCs have both constitutive and inducible HO activity, and they respond to specific stimuli to generate guanylyl cyclaseûstimulatory CO in the same SMCs and in coincubated platelets. |
| Doi | 10.1161/01.cir.91.9.2306 |
| Pmid | 7729015 |
| Wosid | WOS:A1995QV25100004 |
| Is Certified Translation | No |
| Dupe Override | No |
| Comments | Circulation 91: 2306-2309. |
| Is Public | Yes |
| Language Text | English |
| Keyword | MUSCLE, SMOOTH; CARBON MONOXIDE; GUANOSINE |
| Is Qa | No |