Lege Artis Medicinae

[INSULIN RESISTANCE: FOCUS ON THE ADIPOSE TISSUE]

URICH Elemér

MARCH 20, 2004

Lege Artis Medicinae - 2004;14(03)

[Insulin resistance is defined as a state of subnormal biological response to normal quantity of insulin. This phenomenon was first described by Hinsworth and Kerr in 1939, however it has come to the centre of interest only in the last two decades. It is the central pathogenetic factor of type 2 diabetes and the more complex clinical entity of metabolic syndrome, consequently also referred to as insulin resistance syndrome. In the background of insulin resistance alterations of the adipose tissue can be observed which clinically means obesity in most of the cases, however, this issue cannot be simplified to obesity only as increase in adipose tissue growth may be beneficial in certain cases. Current article discusses the explanation of this paradox and the pathophysiologic link between adipose tissue and insulin resistance. It also reviews the therapeutic aspects of insulin resistance emphasizing the role of thiazolidinedione type drugs having recently joined the therapeutic palette.]

COMMENTS

0 comments

Further articles in this publication

Lege Artis Medicinae

[THE PROBLEM OF SMOKING]

RODÉ Magdolna

[Smoking causes a health catastrophy all over the world. Its importance is increasing in the less developed countries. More and more young people (especially women) have started smoking recently. Its devastating effect on women carries on to the next generations. Prevention should already begin in childhood. In Hungary, there is a wide network to assist for those who want to give up smoking - especially in the national network of lung health care clinics. Peer supporters have a prominent role in helping these patients. The market-strategy and publicity campaign of major tobacco producers also deserves intensive attention.]

Lege Artis Medicinae

[SCIENTIFIC DIGEST]

Lege Artis Medicinae

[TRIPTAN THERAPY OF MIGRAINE]

UNGUREAN Aurélia, TAJTI János, VÉCSEI László

[Migraine sufferers in Hungary present a major epidemiological challenge with about 12% of the population affected. Authors have reviewed an extensive body of internationally published literature relative to the 5-hydroxi-triptamin receptor agonists such as the triptans. While summarising most relevant data with a view to enable physicians to choose the most effective therapy for an individual, the article also discusses the prevailing questions of efficacy, tolerability and safety. For those patients with differential-diagnostic difficulties referrals should be made to the specialized 'headache centers' of neurological departments.]

Lege Artis Medicinae

[Global alliance against global threat - The anti-tobacco framework of the World Health Organisation]

VADÁSZ Imre

Lege Artis Medicinae

[DASH]

MATOS Lajos

All articles in the issue

Related contents

Hypertension and nephrology

[Serotoninergic drugs for weight loss. A review of efficacy and cardiovascular safety of lorcaserin]

SIMONYI Gábor

[Complex therapy of obesity consist the medical treatment. Several weight lowering drugs are available in the United States, one of which is 5-HT2c agonist lorcaserin. After failures with former non-selective serotoninergic agents (fenfluramine, dexfenfluramine), there was great anticipation and more questions about the release of lorcaserin, which proved its effectiveness and safety in several phase 3 studies. Lorcaserin is a selective agonist of 5-HT2c receptors, therefore free form adverse effects of former non-selective serotoninergic drugs on valvulopathy or pulmonary hypertension. The results of the recently published CAMELLIATIMI 61 study confirmed the cardiovascular safety of lorcaserin.]

Hypertension and nephrology

[Deeper analysis of nebivolol effects]

KÉKES Ede

[Author presents the formation of nitric oxide as a largest vasodilator of human endothelium as well as the endothelial dysfunction a result of formation at adrenergic stimulus. He demonstrates in detail the benefits of selective β-1 blocker and β-3 adrenergic agonist nebivolol in the vascular system. This drug has also receptor independent effects. Complex effects of nebivolol causes vasodilation, inhibits oxidative stress and it is capable to neutralize the effects of free oxygen radicals and as a result the endothelial function will be better. Its clinical effects and the less wellknown beneficial properties are listed. The use of drug is discussed especially in hypertensives with smoking, COPD or PAD. The β-3 agonist effect provides positive reactions not only in the adipocytes and the myocardial tissue. but in the skeletal muscle as well: Increase in energy expenditure - as a compensatory mechanism - is increased in obesity and the glucose uptake + storage on skeletal muscle cells are increased in hyperglycemia. The insulin sensitivity will be better, leptin level is decreased, adiponectin level is increased by nebivolol. It is assumed this drug has antidiabetic and anti-obesity effects.]

Hypertension and nephrology

[Changing dietary guidelines in obesity. MOMOT recommendation]

PADOS Gyula, SIMONYI Gábor, AUDIKOVSZKY Mária, BEDROS J. Róbert

[In the 70s and 80s due to the heart attack „epidemic” the low fat diet was encouraged based on the cholesterol theory, with moderate success. At the same time, the consumption of carbohydrates increased with the frequency of obesity rising from 1971 to 30% in the USA. Foods with high glicemic index and rich in carbohydrates result in a fast increase in glucose level, insuline actions also leading to glucose – fatty acid transformation and weight gain. Over the last decades several comparative trials have proven that with the low carb diet one can lose about 3- more than with the low fat diet in half a year. The excessive low carbohydrate Atkins diet over 1 year (), was superior even to ZONE (), LEARN (), ORNISH () diet, in another trial, over two years also the „low fat” diet. International Association for the Study of Obesity (IASO) recommends an increased protein intake (15 → 25%) along with carbohydrate with low glicemic index (GI). According to the summarized guidelines of the Hungarian Society of Obesitology and Excercise Therapy (MOMOT) low calorie (1200-1500 kcal / day), low-carb (<45%) – low-GI, high-protein (≥ 25%), low-fat (38→30%) diet is recommended, by witch a weight loss of 10 kg/half year can be expected. After half a year patient compliance deteriorates and they can hardly keep even the low-carb diet, whose significant advantage diminishes by this. We hope that patient compliance can be helped with two new appetite decreasing drugs, namely lorcaserin and a combination of phentermin and topiramat. Future dietary recommendations may be influenced by the new guideline issued in November 2013 by AHA/ACC, and the Obesity Society the final approval of which by NHLBI can be expected by June 2014.]

LAM Extra for General Practicioners

[Special problems of hypertension in women]

KAPOCSI Judit, DEÁK György

[Menopause and pregnancy are especially vulnerable periods of women’s life regarding hypertension. The “Guidelines for the Management of Arterial Hypertension”, issued by the European Society of Hypertension and the European Society of Cardiology, dedicates a separate chapter to hypertension in women. The renewed guidelines of the Hungarian Society of Hypertension also pays a special attention to hypertension detected during pregnancy. In this article, the euthors review the topics of hypertension detected during menopause and pregnancy, discussing pathomechanism and therapy.]

Image challenge

What do you see on the feet of the diabetic patient?