Lege Artis Medicinae

[Val-PREST (Valsartan for Prevention of Restenosis)]

MATOS Lajos

MAY 21, 2006

Lege Artis Medicinae - 2006;16(05)

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Lege Artis Medicinae

[A Pioneering Endeavour Stem Cell Transplantation in 1971]

dr. KÖVES Péter

Lege Artis Medicinae

[THE COMPLEX EFFECT OF TREATMENT TARGETING THE OESTROGEN RECEPTORS IN POSTMENOPAUSAL WOMEN]

TAKÁCS István, LAKATOS Péter

[Hormone depletion after menopause results in the dramatic increase of the incidence of a number of diseases. It should seem reasonable to substitute female hormones to prevent or treat these disorders. However, hormone replacement therapy has not fulfilled the expectations in its current form. While the first large, prospective, randomized, controlled primary prevention trial showed a beneficial effect of hormone replacement on bone fracture and colorectal cancer, the incidence of cardiovascular diseases and breast cancer increased. The overall effect of treatment was assessed by the so called global index. Based on the global index, the overall health risk exceeded benefits from 5 years use of combined oestrogen plus progestin among healthy postmenopausal women. In another study, oestrogen alone did not affect the incidence of coronary heart disease or colorectal cancer, neither was the increase in breast cancer rate significant. Similarly to combination therapy, the beneficial effect on bone fracture rate and the adverse effect on the incidence of cerebrovascular events have remained. Overall, oestrogen monotherapy had no effect on the global index. There is not enough data available yet to draw a conclusion on the overall effect of fitooestrogens that also target oestrogen receptors and tibolon, a steroid hormone with tissue-specific effects. Raloxifene, a selective oestrogen receptor modulator considerably decreases the rate of vertebral fractures. In a study it also decreased the number of peripheral fractures in a subgroup of patients with severe vertebral fractures. It reduced the rate of cardiovascular and cerebrovascular events in patients at increased cardiovascular risk. The incidence of breast cancer dropped both in the original 4-year study period and in its 4-year extension. Based on the beneficial change of the global index, it is only raloxifen that can currently be recommended for the complex treatment of postmenopausal women.]

Lege Artis Medicinae

[In the focus: depression]

RIHMER Zoltán

Lege Artis Medicinae

[Requiem - For the fiftieth anniversary of the foundation of the Institute for Postgraduate Medical Education]

FORGÁCS Iván

Lege Artis Medicinae

[1900–1906]

GÁTI István

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[Effective therapy for lung cancer is yet unknown and the role of prevention has continuously increased. In practice, primary prevention of lung cancer means the reduction of smoking either by cessation or by patient education. Screening for lung cancer, considered as a secondary prevention measure, has long been debated. The previously negative attitude for screening has slowly changed in the past years. New studies have been organised recently to make screening more effective. In high risk groups, helical CT-scans with low dose X-ray exposure are preferred and the effectivity of sputum citology completed with immunocytochemical tests is under investigation. Determining the risk group, we focus on age, smoking history, airway obstruction and certain tumour markers. With the help of traditional chest X-rays approximately one third of new cases of lung cancer are discovered in Hungary. Our reasonable target is to identify 60-70% of the new NSCLC cases by risk group screening (age>40 years, smoking>20 P.Y., decrease of FEV1>15%, family lung cancer history and previous asbestos exposure) and by organising population screening more effectively.]

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[THE IMPORTANCE OF VITAMIN D DEFICIENCY IN PRACTICE]

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[The effects of vitamin D in bone health have been known since the 1920s. Recently, it has been proven that its role in the body is much more complex. Activated vitamin D is a steroid hormone that regulates transcription of more than 200 human genes through its receptor that is detectable in almost all types of cells. In contrast to the former conceptions, it can be activated not only in the kidneys; moreover, local 1-α-hydroxylation plays a greater role in its extraskeletal effects. Vitamin D deficiency, currently defined as serum levels of <30 ng/ml, is caused by the lack of ‘effective’ sunlight exposition. Thus, vitamin D deficiency is one of the most frequent deficiencies in the developed world that plays a role not only in the development of skeletal conditions but many other diseases, as well. A low vitamin D level causes a reduced calcium absorption, a higher bone remodelling rate and increased bone loss. It also reduces muscle strength and increases the risk of falling. Normal vitamin D status is required for the effectiveness of drugs for osteoporosis treatment; however vitamin D treatment in itself is not effective in osteoporosis. An increasing number of studies show the benefits of vitamin D supplementation and treatment in extraskeletal conditions. Vitamin D plays an important role in the prevention of several auto-immune diseases, infections, cardiovascular diseases, and cancers. Therefore, all UV-B radiation-deprived adults require an intake of vitamin D to maintain a level of >30 ng/ml. Vitamin D3 treatment is safe. The necessary dose can be reliably approximated by the calculation that an incremental consumption of 100 IU/day raises serum vitamin levels by 1,0 ng/ml. Clinical trials suggest that for the vast majority of individuals, a prolonged intake of 10,000 IU/day does not pose any risk.]

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BAJNOK László

[Despite that hypercholesterinemia is not a risk factor of stroke, treatment with statins is able to reduce these events in a clinically relevant degree. Intervention trials suggest that while for primary prevention, statins are effective in conventional dose, after stroke or TIA this is true only if LDL-cholesterol is reduced below 1,8 mmol/L. To reach this goal, usually intensive antilipid treatment is necessary. There are studies showing beneficial impacts of other lipid drugs, beyond statins, i.e. fibrates and fish oil (among the settings of primary, and secondary preventions, respectively). Against cerebro-vascular events, pleitropic effects of some antihypertensive and antidiabetic medications can also be established.]

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[THE USE OF EARLY BIOMARKERS IN PREVENTION. - THE MARKERS OF THE EXPOSITION, EARLY EFFECT AND INDIVIDUAL SENSITIVITY]

EMBER István, KISS István, SÁNDOR János, FEHÉR Katalin, NÉMETH Katalin, LUKÁCS Péter

[The molecular and predictive epidemiology plays more and more important role in the prevention of cancer. With the help of early biomarkers, high risk population could be identified for primary preventive intervention modalities. It uses both molecular biological methods and elements of risk assessment plus a testing system based on animal experiments. Its specificity is not high enough to establish the diagnosis but it can be used to monitor the disease and to follow the effectivity of the therapy (e.g. "minimal residual disease") and the preventive interventions. It is also suitable for risk assessment with the markers of individual susceptibility. As to everyday practice there are many problems because of limited therapeutic possibilities, but we hope that the molecular and predictive epidemiology becomes an important part of medicine in the near future.]

Lege Artis Medicinae

[Acetylsalicylic acid (ASA) 75 or 100 mg? ]

KIS János Tibor, ZSIGMOND Kálmán

[The acetylsalicylic acid (ASA) is one of the oldest and most widely used drugs in the world. Currently, it is the most commonly used for the treatment and prophylaxis of cardiovascular diseases. Today, there has been consensus that the risk of ASA’s side effects in primary prevention is greater than the expected benefits. However, it maintains its leading role in the secondary prevention of cardiovascular diseases. There is also a consensus that small doses are recommended for preventive purposes, but there is no agreement whether it should be 75 or 81 or 100 mg. The authors summa­rize the publications published in this topic. ]