Nitroxyl (HNO) displays pharmacological and therapeutic actions distinct from those of its redox sibling nitric oxide (NO(•)). It remains unclear, however, whether the vasoprotective actions of HNO are preserved in disease. The ability of the HNO donor isopropylamine NONOate (IPA/NO) to induce vasorelaxation, its susceptibility to tolerance development, and antiaggregatory actions were compared...

Recent animal data suggest that reduced lipoic acid (LA) prevents oxidative inhibition of the nitrate bioactivating enzyme, the mitochondrial aldehyde dehydrogenase (ALDH-2), and that pentaerythritol tetranitrate (PETN) does not induce nitrate tolerance because of its intrinsic antioxidative properties, thereby preserving ALDH-2 activity. We sought to determine whether ALDH-2 activity in circul...

OBJECTIVES The present study was designed to assess whether exercise training can enhance endothelium-dependent dilatation in healthy young men. BACKGROUND Exercise has been shown to reduce cardiovascular morbidity and mortality, but the mechanisms for this benefit are unclear. Endothelial dysfunction is an early event in atherogenesis, and animal studies have shown that exercise training can...

Background The East Asian variant of mitochondrial aldehyde dehydrogenase (ALDH2) exhibits significantly reduced dehydrogenase, esterase and nitroglycerin (GTN) reductase activities [1]. The small molecule Alda-1 was reported to partly restore low acetaldehyde dehydrogenase activity of this variant [2]. In the present study we compared the wild-type enzyme (ALDH2*1) with the East Asian variant ...

With the use of some simple calculations it can be demonstrated that the choice of cannula and initial glyceryl trinitrate (GTN) infusion rate for patients with acute left ventricular failure (LVF) requires some careful thought. If a GTN infusion is commenced at a rate of 1 ml/h, a critically unwell patient with a large cannula--for example, a grey cannula--will have to wait over 6 min for the ...

The effects of sublingual nitroglycerin (GTN) on left ventricular wall motion (LVWM) were examined by angiographic assessment in eight patients with anginal chest pain. Five of seven patients having occlusive coronary artery disease showed segmental abnormalities in LVWM characterized by regional hypokinesis or akinesis at rest. These abnormalities were accentuated by tachycardia induced by atr...

Skin absorption of glyceryl trinitrate (GTN) has been recognized for a long time. The effect of GTN and a placebo ointment in prevention of chest pain has been assessed and compared by studying the exercise capacity in 17 patients with angina pectoris. The placebo cream was ineffective but the GTN ointment was found to have beneficial effect in relief of pain in 16 cases. This was established b...

Nitric oxide (NO) has been implicated in the pathogenesis of migraine and treatment with its exogenous donor glyceryl trinitrate (GTN) represents widely accepted experimental "migraine model". In this study, glyceryl trinitrate was administered intraperitoneally to carps, serum nitrite and nitrate levels were determined, permeability of blood-brain barrier was investigated, and histological cha...

gestational trophoblastic neoplasia ( gtn) is one of the most common gynecologic tumors in our country. despite development of effective chemotherapy: some cases remain resistant and if there is only focus of tumor, resection would be indicated.we present a young woman with stage 1 persistant gtn showing no response to chemotherapy. transvaginal sonograpy revealed trophoblastic tissue in the ut...

background : gestational trophoblastic neoplasia (gtn) refers to malignant lesions that arise from abnormal proliferation of placental trophoblast. even in its metastatic forms gtn is curable with a cure rate of 90-100 %. currently, methotrexate with or without folic acid, andactinomycin d is recommended for low risk gtn. the aim of this study is to compare the efficacy of methotrexate and acti...