Lege Artis Medicinae



FEBRUARY 22, 2007

Lege Artis Medicinae - 2007;17(02)

[Sulfonylureas, used as base therapy in type 2 diabetes, specifically block ATP-dependent potassium channels (K+ ATP). While in pancreatic beta cells these channels have an essential role in insulin release, they are also involved in cardiovascular adaptive mechanisms. Ion channels with similar morphology may have different pathophysiological effects in the human body. This raises the question, is it necessary to count with some damage to the cardiovascular protective mechanism when using sulfonylurea to induce insulin secretion. Is this indeed a relevant clinical problem today? The answer may lay in the different organ-specific effects of sulfonylureas.]



Further articles in this publication

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[Those Sentenced to Death]

dr. PINTÉR László

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[INTRODUCTION - Diffuse large B-cell lymphoma frequently has bone involvement, but primary bone lymphoma is rare (around 4% of primary extranodal lymphomas). Long bones are most often affected, followed in frequency by the ribs, vertebrae, and pelvic bones. The main symptom is bone pain. CASE REPORT - The case of a young man is presented whose disease started with lumboischialgia. Since rheumatological treatment did not relieve the symptoms, MRI was performed, which showed a tumour with massive iliac bone destruction. Three months after the initial symptoms a surgical biopsy from the right ilium showed diffuse large B-cell lymphoma. Soon after acute renal insufficiency developed and the patient was put on haemodialysis. Based on the findings the disease was staged as Ann Arbor IV/B (bone and kidney), ECOG PS 3, International Prognostic Index 4. On the basis of the preliminary histological findings, reduced-dose CHOP chemotherapy was given, which resulted in a significant improvement of the renal function and haemodialysis could be abandoned. This was followed by 6 additional cycles of Rituximab-CHOP treatment and further 2 cycles of Rituximab-DHAP salvage chemotherapy with intrathecal prophylaxis, and, finally, since no response could be detected, R-IVAC treatment was given. After an initial response, the disease became progressive, and the patient died 9 months after the diagnosis was made from a disseminated chemoresistant disease. Autopsy confirmed extensive infiltration of the right iliac bone, kidneys, bone marrow, spleen, supraclavicular and abdominal lymph nodes, pancreas, scalp and brain. CONCLUSIONS - This case was chosen to be presented because of the unusual localisation of the diffuse large B-cell lymphoma, the initial diagnostic difficulty, and the very rapid progression despite the application of several aggressive chemotherapy schemes. A primary bone large B-cell lymphoma represents a diagnostic challenge with its rheumatological symptoms thus delaying diagnosis.]

Lege Artis Medicinae

[57th Annual Meeting of the American Association for the Study of Liver Diseases]

PÉTER Zoltán

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[Is there a need for infectologists?]


Lege Artis Medicinae

[Zoonoses in focus]

LAKOS András

All articles in the issue

Related contents

Lege Artis Medicinae

[Lixisenatide: a new GLP-1-receptor agonist with mainly prandial effect for the treatment of patients with type 2 diabetes]


[Recently, lixisenatide, a new incretin mimetic GLP-1-receptor agonist with a mainly prandial effect has been registered for the treatment of patients with type 2 diabetes mellitus. The amino acid sequence of lixisenatide and that of human native GLP-1 is 50% identical. Due to its altered amino acid sequence and conformation, lixisenatide is resistant to inactivation by DPP-4. Lixisenatide is a specific agonist of GLP-1- receptors and its binding has a pharmacologic GLP-1-agonist effect. Lixisenatide is used subcutaneously, its normal daily dose is 1×20 μg. It is mostly used in combination with metformin, but it can be also used to supplement sulfanylurea or basal insulin therapy. Clinical efficiency of lixisenatide has been investigated in the phase-III GetGoal trials. In these trials, adequate glycaemic control and a marked decrease in postprandial blood glucose values were observed. During lixisenatide therapy, a decrease in body weight and no substantial increase in the risk of hypoglycaemia were observed, whereas transient gastrointestinal side effects might occur after initiation of treatment. Lixisenatide as an add-on treatment to basal insulin should be considered as a new treatment approach in the management of type 2 diabetes.]

Clinical Neuroscience

[Clinical significance of the cardiovascular effects of fingolimod treatment in multiple sclerosis]


[Fingolimod is a sphingosine-1 phosphate receptor modulator, which is effective in the treatment of severe relapsingremitting form of multiple sclerosis. Once daily oral use of fingolimod decreased the annualized relapse rate, inflammatory brain lesion activity and the rate of brain atrophy compared both to placebo and intramuscular administered interferon beta-1a. The drug targets the cardiovascular system as well via sphingosine- 1 phosphate receptors. After initiation of fingolimod therapy transient sinus bradycardia and slowing of the atrioventricular conduction develops. The onset of the effect is as early as 1 hour post administration, while heart rate and conduction normalized in 24 hours in most of the cases. According to the clinical trials symptomatic bradycardia developed in 0.5% of the cases, responding to the appropriate therapy. The incidence of Mobitz I type II atrioventricular blocks and blocks with 2:1 atrioventricular conduction was 0.2% and 0.1%, respectively. All of these cardiovascular events showed regression during observation and no higher degree atrioventricular blocks were detected at the approved therapeutic dose. Following the first dose effect, fingolimod had a moderate hypertensive effect on long-term. For the safety of fingolimod treatment detailed cardiovascular risk stratification of all patients, adequate patient monitoring after the first dose and competency in treating the possible side effects is necessary. In patients with increased cardiovascular risks, treatment should be considered only if anticipated benefits outweigh potential risks and extended monitoring is required.]

Hypertension and nephrology

[The prevalence of type 2 diabetes mellitus in the Hungarian population with hypertension]

KÉKES Ede, PÁL László, SCHANBERG Zsolt, KISS István

[Authors had found diabetes mellitus type 2 in 30% of 38 886 hypertensive patients (stadium I-III). Diabetes was more frequent in case of women under 30 years. Subsequently all age groups (from 40 to 80 years) incidence was more frequently (p<0.01-0.001) in men, above 80 years again a higher ratio was in women. Presence of diabetes was correlated to rate of BMI value and systolic, diastolic pressure as well. In women - above 140 mmHg systolic pressure - the elevation was exponential. We have found a significant correlation between fasting glucose and waist. Reaching the target blood pressure is not a simply task in hypertensive patients with diabetes. The 140/90 mmHg was reached in 34.2%, 90 mmHg diastolic blood pressure in 62.3%, but the required 80 mmHg only in 16.4% of cases. Achieve the target value was quite different in the different region of our country. The major cardiovascular complications (stroke, renal disease, myocardial infarction, peripheral artery disease) have suffered a higher rate in the hypertensives with diabetes compered to hypertensives without diabetes.]

Lege Artis Medicinae

[A new approach to the treatment of diabetic retinopathy - PPAR-α agonist activity of fenofibrate]


[Diabetic retinopathy (DR) is a leading cause of visual impairment worldwide. It affects nearly half of patients with diabetes and its severity increases with the progress of diabetes. Glycotoxicity, lipotoxicity and hypertension are the main risk factors for the development of DR. The control of glucose homeostasis and blood pressure are the main noninvasive approaches that might have a role in the treatment of this condition. On the basis of new studies, RAS inhibitors and fenofibrate are promising candidates that can be used to retard DR progression and/or induce its regression. Two large-scale studies (FIELD, ACCORD Eye) have demonstrated that fenofibrate therapy significantly reduces the need for laser treatment of DR. The efficiency of this therapy, which is independent of lipid changes, is primarily attributable to the PPAR-α agonist activity of fenofibrates. According to guidelines that discuss the new therapeutic approaches of DR, fibrate therapy is a promising new option for preventing the progression of DR.]

Lege Artis Medicinae

[Investigation of skin microcirculation in diabetes mellitus by laser Doppler flowmetry]


[The prognosis of patients with diabetes mellitus is mainly influenced by vascular complications which is partly due to the deterioration of the microcirculation. Laser Doppler flowmetry is a suitable method to investigate the complex disturbance that characteristic for diabetic microcirculation. This review gives a summary of the anatomical, physiological and theoretical backgrounds and the possibilities in diagnosis given by Laser Doppler flowmetry.]