Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: EC:3.1.4.1 (phosphodiesterase)
 18,767 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The numerous controlled clinical trials performed recently in pulmonary arterial hypertension (PAH) can allow us to abandon a clinical-based treatment strategy and adopt an evidence-based therapy. The treatment algorithm is restricted to patients in NYHA class III or IV. The different treatments have been evaluated mainly in sporadic, idiopathic PAH and in PAH associated with scleroderma or to anorexigen use. Extrapolation of these recommendations to other PAH subgroups should be done with caution. High doses of calcium channel blockers are indicated only in the minority of patients who are responders to acute vasoreactivity testing. Patients in NYHA class III should be considered candidates for treatment with either an endothelin receptor antagonist, a prostanoid or a type 5 phosphodiesterase inhibitor. Continuous intravenous administration of epoprostenol is proposed as rescue treatment in NYHA class IV patients. Combination therapy can be attempted in selected cases. Balloon atrial septostomy and/or lung transplantation are indicated for refractory patients or when medical treatments are unavailable.
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PMID:Pulmonary arterial hypertension: therapeutic algorithm. 1627 Apr 80

Systemic sclerosis (scleroderma) is considered as the most severe connective tissue disease. It is characterized by an abnormal immune activation, a vasculopathy and a fibrosis of the skin and of multiple internal organs. Numerous progress in the understanding of the pathogenesis with identification of key molecules have permit to introduce novel treatments that improve the management of some aspects of the disease. ACE inhibitors are effective in resolving renal crisis. Cyclophosphamide is useful for treatment of fibrosing alveolitis. Prostaglandins, endothelin receptor antagonists and phosphodiesterase type 5 inhibitors permit to improve the treatment of the vascular complications (digital ulcerations, pulmonary arterial hypertension) of scleroderma.
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PMID:[Pathogenic mechanisms in systemic sclerosis and their therapeutical consequences. Part 2: treatment]. 1671 Nov 51

Pulmonary arterial hypertension (PAH) is a serious complication of systemic sclerosis (SSc) and a leading cause of death in patients with it. Recent publications suggest that a prevalence of 10-15% is likely. The prognosis remains poor compared to that of idiopathic PAH. WHO recommends annual echocardiography for PAH screening of patients with SSc. Right heart catheterization is necessary to confirm the diagnosis. Nevertheless, more than half of all SSc patients have symptoms classified as WHO functional class III or IV at diagnosis. Prostacyclin therapy, delivered via continuous intravenous infusion (epoprostenol), has been demonstrated to be effective in patients with severe PAH (both idiopathic and scleroderma-related). Prostacyclin analogs (such as treprostinil and iloprost) are other options. Bosentan is the first endothelin receptor antagonist approved in the EU for the treatment of PAH, both idiopathic and related to connective tissue diseases such as scleroderma, in patients in WHO functional class III. Sildenafil by its selective inhibition of phosphodiesterase type 5 is also effective against both types of PAH. It too is now approved in the EU for this purpose in patients in WHO functional class III, but we do not yet have any information about its long-term effects in scleroderma.
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PMID:[Pulmonary arterial hypertension and systemic sclerosis]. 1715 19

Vascular acrosyndromes constitute a common reason for physician visits. They are associated with connective tissue disease; for example, 90% of patients with scleroderma experience Raynaud's phenomenon. The rheumatologist must strive to establish the diagnosis, to identify a potential underlying cause, and to prescribe effective treatment when the symptoms are incapacitating. Raynaud's phenomenon is the acrosyndrome most commonly encountered by rheumatologists. The diagnosis of Raynaud's phenomenon rests on clinical grounds. Nailfold capillaroscopy and immunological tests are useful chiefly for determining the cause. Calcium-channel antagonists are the treatment of reference for Raynaud's phenomenon. Drugs introduced over the last few years for severe refractory forms include prostacyclin and its derivatives, endothelin receptor antagonists, and phosphodiesterase inhibitors. These drugs were developed as a result of new knowledge on the pathogenesis of Raynaud's phenomenon. Acrocyanosis, which is extremely common, and erythromelalgia are the other main vascular acrosyndromes.
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PMID:Raynaud's phenomenon. 1721 39

Acral manifestations of systemic sclerosis include Raynaud's phenomenon, calcinosis cutis, and sclerodactyly. In the later stages of the disease, contractures of the skin and joints as well as obliterative vasculopathy leading to digital ulcers and necrotic lesions may occur. Patients with acral manifestations of systemic sclerosis are ideally treated by a team that includes a rheumatologist, dermatologist, hand surgeon, physiotherapist, and, eventually, a psychologist. Calcium channel antagonists, alpha(1)-adrenergic blockade with prazosin, and prostacyclin analogs were proven to be effective in the treatment of scleroderma-related Raynaud's phenomenon. Losartan, an angiotensin II receptor inhibitor, and fluoxetine, a selective serotonin reuptake inhibitor, have been beneficial for systemic sclerosis-associated Raynaud's phenomenon in pilot studies. Parenteral prostacyclin analogs, e. g., iloprost, can be recommended as first-line treatment of ischemic digital ulcers. When prostacyclin analogs fail, the phosphodiesterase type 5 inhibitor sildenafil can be tried to improve ulcer healing. Bosentan, an endothelin receptor antagonist, may prevent new digital ulcers. At present, there are no medical agents agreed to be generally effective in the reduction of calcinotic deposits or cutaneous fibrosis, although some drugs have been identified as potentially beneficial. Surgical treatment of acral manifestations consists of excision or curettage of symptomatic calcific deposits, digital sympathectomy, arterial reconstruction, and amputation in rare cases. Flexion contractures of the proximal interphalangeal joints, with secondary hyperextension of the metacarpophalangeal joints, can be treated by arthrodesis of the proximal interphalangeal joints and resection arthroplasty or prostheses at the metacarpophalangeal joints to improve hand function.
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PMID:[Therapeutic management of acral manifestations of systemic sclerosis]. 1734 17

Raynaud's phenomenon is a common disorder with vasospasm of the digital arteries causing pallor with cyanosis and/or rubor. It can be primary (idiopathic), where it is not associated with other diseases, or secondary to several diseases or conditions, including connective tissue diseases, such as scleroderma and systemic lupus erythematosus. Raynaud's is often mild enough to not require treatment; however, with secondary Raynaud's there is not only vasospasm but also fixed blood vessel defects so the ischaemia can be more severe. Complications can include digital ulcers and could, rarely, lead to amputation. Treatment is often non-pharmacological including avoiding cold and smoking cessation. Calcium channel antagonists, such as nifedipine, are often considered when treatment is needed; however, adverse effects of these drugs can include hypotension, vasodilatation, peripheral oedema and headaches. Other treatments have been studied in randomised, controlled trials including classes of drugs, such as angiotensin II inhibitors, selective serotonin reuptake inhibitors, phosphodiesterase-5 inhibitors (e.g. sildenafil), nitrates (topical or oral; the latter can be limited by adverse effects, such as flushing, headache and hypotension), and for more serious Raynaud's or its complications prostacyclin agonists may be used. There are two large studies that demonstrate that endothelin receptor blockade with bosentan can reduce the number of new digital ulcers in scleroderma patients. However, it does not affect the healing period. Thus, Raynaud's is common and often requires non-pharmacological treatment. When secondary Raynaud's is suspected, such as Raynaud's with an older age at onset or other features of connective tissue disease, then an appropriate history, physical examination and laboratory tests may be indicated to reach an appropriate diagnosis. There have been advances in pharmacological treatment, but some of the treatments are limited by adverse effects.
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PMID:The diagnosis and treatment of Raynaud's phenomenon: a practical approach. 1735 12

Clinical manifestations of scleroderma at the hand include Raynaud's phenomenon, calcinosis cutis, sclerodactylia and teleangiectasia. With the progression of the disease, cutaneous and joint contractions, acro-osteolysis, necrosis of the finger tips, and even extensive digital ulceration are likely to occur. These painful and often rapidly advancing lesions cause loss of function and disfigurement and, untreated, often lead to mutilation of the affected hand. Only an interdisciplinary management including the hand surgeon, the rheumatologist, and the physiotherapist can guarantee optimal treatment. Drug therapy should be included as well as physical therapy. Both should be made use of before and accompanying surgical treatment. Surgical therapy consists of treatment of the infections, excision of calcinosis, arthrodesis, in particular of the proximal interphalangeal joints, and sympathectomy. Amputation remains a final option, whereas with timely and sufficient treatment, amputations can be avoided and an improvement of function and an alleviation of the symptoms can be achieved. Among the non-operative treatment options, behavioural training, calcium antagonists, prostacyclin derivatives, topical nitrates as well as plexus anesthesia and stellatum blocks have proved to be effective. Recent drug therapies include endothelin-receptor antagonists for the prevention of digital ulceration and phosphodiesterase-V antagonists in treatment of Raynaud's phenomenon and induction of ulcer healing. With reference to several cases seen at our institution, we propose an interdisciplinary treatment concept for acral manifestations of scleroderma.
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PMID:[Manifestations of scleroderma at the hand--options for hand surgery in an interdisciplinary concept]. 1749 10

Acral ulcers in patients with progressive systemic sclerosis (PSS) are often recalcitrant to therapy. Sildenafil, an inhibitor of phosphodiesterase-5, dilates small arteries by increasing endothelial cGMP. Oral administration of sildenafil to a 35-year-old white male patient suffering from incapacitating PSS with severe pulmonary arterial hypertension and acral ulcers induced a clinically significant reduction in dyspnea and increase in walking distance within one week as well as complete and long-lasting healing of all ulcers within five weeks. This case demonstrates the efficacy of sildenafil in the treatment of scleroderma-associated refractory acral ulcers.
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PMID:[Fast and efficient healing of scleroderma-associated acral ulcers with sildenafil]. 1761 9

(1) Scleroderma and secondary Raynaud's phenomenon are frequently associated with increased morbidity for which no specific standardised treatment guidelines exist. (2) Current therapies for scleroderma target the immune system, with the goal of reducing inflammation and secondary tissue injury and fibrosis. Therapy targeting underlying vascular disease is designed to improve the symptoms of Raynaud's phenomenon and to reduce ischemic injury to involved organs. (3) Few controlled trials of therapy used for scleroderma are completed, and current treatments are largely based on organ-specific therapy and uncontrolled case series suggesting disease modification. (4) Recent randomised, controlled trials in scleroderma demonstrate promising results in the treatment of interstitial lung disease with cyclophosphamide, and vascular disease of the lungs and digits with endothelin receptor antagonists, the phosphodiesterase inhibitor sildenafil and prostacyclins, while trials with methotrexate show only modest benefit in controlling scleroderma-associated skin disease. (5) Prostacyclins are a therapeutic option in patients with secondary Raynaud's phenomenon. Modest benefits have also been shown with alpha1-antagonists and calcium channel blockers, while the effect of ACE inhibitors has been variable. Some data suggest some benefits to the use of the phosphodiesterase inhibitor sildenafil, the serotonin uptake inhibitor fluoxetine and the angiotensin receptor inhibitor losartan.
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PMID:Current drug therapy for scleroderma and secondary Raynaud's phenomenon: evidence-based review. 1791 43

Despite the introduction of new drugs that have changed the course of pulmonary arterial hypertension (PAH), some patients are still refractory to treatment and deteriorate rapidly. Long-acting phosphodiesterase-5 inhibitors are a new class of drugs that are effective in PAH. This prospective study assessed the potential of combination therapy with prostacyclin and tadalafil for treatment of severe PAH. We report four cases of severe PAH that deteriorated despite prostacyclin therapy. Two patients had Eisenmenger syndrome, one had pulmonary hypertension associated with scleroderma and one had histiocytosis X. All were treated with tadalafil, 10-20 mg once daily, in addition to prostacyclin. After 3 months of treatment, all patients improved clinically, with an increase in mean 6MWD from 214 to 272 m. In three patients, the New York Heart Association functional class decreased from IV to III. Echocardiograms showed no significant changes in pulmonary arterial pressure. Although this study was limited by the small sample size, it suggests that tadalafil in combination with prostacyclin is an effective treatment for severe PAH. Tadalafil may be beneficial for the treatment of patients with advanced disease.
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PMID:Combination therapy with prostacyclin and tadalafil for severe pulmonary arterial hypertension: a pilot study. 1881 91


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