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Drugs online research references

Gen Pharmacol. 1990;21(4):555-8.
Effect of SQ29,852, a new angiotensin converting enzyme (ACE) inhibitor with a phosphonic acid group, on the activity of angiotensin converting enzyme from human kidney.

Hiwada K, Inoue Y, Kokubu T.

Second Department of Internal Medicine, Ehime University School of Medicine, Japan.

1. An in vitro experiment was carried out to compare the inhibitory effect of SQ29,852 on human renal angiotensin converting enzyme (ACE) with those of captopril, enalapril and enalaprilat. 2. SQ29,852 strongly inhibited human renal ACE; its IC50 value was 1.5 x 10(-8) M. In terms of the IC50, SQ29,852's efficacy was about 1/10 of that of captopril and 1/28 of that of enalaprilat, but it was about 14 times more potent than enalapril. 3. SQ29,852 showed no inhibitory effects on cathepsin D, urinary kallikrein, renal renin, pepsin, trypsin and chymotrypsin. Its ACE-specificity was higher than that of captopril. 4. ACE inhibition by SQ29,852 was shown to be competitive, as revealed by Lineweaver-Burk plots. The affinity of SQ29,852 to ACE was shown to be high by a Ki value of 1.2 x 10(-8) M.

online pharmacy ref source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=2165961&dopt=Abstract

Clin Cardiol. 2000 Dec;23(12):909-14.
Effect of heart failure program on cardiovascular drug utilization and dosage in patients with chronic heart failure.

Ramahi TM, Longo MD, Rohlfs K, Sheynberg N.

Department of Internal Medicine, Yale School of Medicine, New Haven, Connecticut 06510-2483, USA.

BACKGROUND: Utilization and dosage of angiotensin-converting enzyme (ACE) inhibitors in patients with chronic heart failure (CHF) remain low. Recent data suggest that care of patients with CHF in specialized heart failure programs is associated with improved clinical outcomes. HYPOTHESIS: Specialized heart failure care is associated with better utilization and higher dose of cardiovascular drugs. METHODS: Data from 133 patients with CHF referred to a heart failure program were analyzed. Mean functional class 3.1 +/- 0.5, left ventricular ejection fraction 19 +/- 8. Utilization and doses of cardiovascular drugs were examined at initial evaluation and at last visit, after an average period of 17 +/- 14 months. Hospitalization and survival data were determined. RESULTS: Utilization of ACE inhibitors and angiotensin-receptor blockers increased from 87 to 100% (p < 0.001). Average daily dose increased by 60%, from the equivalent of captopril 105 +/- 78 mg to 167 +/- 86 mg (p < 0.001). Utilization of the following drugs increased significantly: beta blockers (16-37%, p < 0.001), metolazone (10-23%, p = 0.007), spironolactone (1-36%, p < 0.001), amiodarone (7-15%, p = 0.05), hydralazine (1-9%, p = 0.004), and nitrates (20-33%, p = 0.03). One-year survival was 90%. The 3- and 6-month hospitalization rates for heart failure were 4 and 7%, and for all cardiovascular causes they were 6 and 11%, respectively. CONCLUSIONS: Care of patients with CHF in a specialized heart failure program was associated with significant increase in the utilization and doses of all beneficial cardiovascular drugs, especially ACE inhibitors. It was also associated with excellent clinical outcomes.

online pharmacy ref source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11129677&dopt=Abstract

Hypertens Res. 2000 Nov;23(6):693-9.
Decreased depressor response mediated by calcitonin gene-related peptide (CGRP)-containing vasodilator nerves to spinal cord stimulation and levels of CGRP mRNA of the dorsal root ganglia in spontaneously hypertensive rats.

Kawasaki H, Nuki Y, Yamaga N, Kurosaki Y, Taguchi T.

Department of Clinical Pharmaceutical Science, Graduate School of Natural Science and Technology, Okayama University, Japan.

The depressor response to electrical stimulation of the spinal cord and the level of calcitonin gene-related peptide (CGRP) mRNA in the dorsal root ganglion (DRG) in the spontaneously hypertensive rat (SHR) was compared with the normotensive Wistar Kyoto rat (WKY) and Wistar rat (WR). The animals were pithed by inserting a stainless-steel rod into the spinal cord. Pithed rats were treated with hexamethonium (2 mg/kg/min i.v.) to block autonomic outflow, and mean arterial blood pressure (MBP) was maintained at approximately 100 mmHg with continuous infusion of methoxamine (10 to 15 microg/kg/min i.v.). Electrical stimulation (2 and 4 Hz for 30 s) of the lower thoracic spinal cord (T9-12) via the pithing rod caused a frequency-dependent depressor response without a change in heart rate. The depressor response to spinal cord stimulation was significantly smaller in SHR than in WKY and WR. Long-term treatment of 8 week-old SHR with captopril (0.1% in drinking water) for 7 weeks restored the reduced depressor response to spinal cord stimulation. The level of CGRP mRNA in DRG of SHR was significantly lower than that in WKY. These results suggest that the function of CGRP-containing nerves from the spinal cord decreases in SHR and captopril treatment prevents its reduction.

online pharmacy ref source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11131283&dopt=Abstract

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