Lege Artis Medicinae

[Recent technical opportunities of computed tomography of the heart]

PRÉDA István

OCTOBER 20, 2010

Lege Artis Medicinae - 2010;20(10)

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Lege Artis Medicinae

[Postmenopausal changes of immune system-related genes expression in human bone tissue]

BALLA Bernadett, KÓSA P. János, KISS János, PODANI János, TAKÁCS István, LAZÁRY Áron, BÁCSI Krisztián, NAGY Zoltán Zsolt, SPEER Gábor, LAKATOS Péter

[INTRODUCTION - The molecular and cellular interactions between the immune system and bone tissue have been established. Sex hormone deficiency at the time of menopause has multifunctional role by influencing growth, differentiation and metabolism of the skeletal and the immune system. We have used non-parametric and multidimensional expression pattern analyses to determine significantly changed mRNA profile of immune system-associated genes in postmenopausal (POST) and premenopausal (PRE) non-osteoporotic bone. MATERIALS AND METHODS - Ten bone tissue samples from POST patients and six bone tissue samples from PRE women were examined in our study. The transcription differences of selected 50 genes were analyzed in Taqman probe-based quantitative real-time RT-PCR system. RESULTS - Mann-Whitney test indicated significantly down-regulated transcription activity of 3 genes (CD14, HLA-A, ITGAM/CD11b) and upregulated gene expression of 6 genes (C3, CD86, IL-10, IL-6, TGFB3, TNFSF11/RANKL) in POST bone. According to the canonical variates analysis results, the groups of postmenopausal and premenopausal women are separable by genes coding for cytokines, co-stimulators and cell surface receptors affected in antigen presentation and T cell stimulation which have high discriminatory power. CONCLUSIONS - Based on a complex gene expression patterns in human bone cells, we could distinguish POST and PRE states from an immunological aspect. Our data might provide further insight into the changes of the intersystem crosstalk between immune and skeletal system, as well as local immune response in the altered microenvironment of POST bone.]

Lege Artis Medicinae

[Disorders of despair]

BÁNFALVI Attila

Lege Artis Medicinae

[Fulvestrant therapy for preventing the progression of advanced bone metastasis]

GYERGYAY Fruzsina

Lege Artis Medicinae

[Successful localization of an insulinoma with angiography]

BAKÓ Barnabás, LÁZÁR István, TARKÓ Erzsébet, OROSZ Péter

Lege Artis Medicinae

[SHIFT (Systolic Heart failure treatment with the If inhibitor ivabradine Trial)]

MATOS Lajos

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Clinical Neuroscience

Late simultaneous carcinomatous meningitis, temporal bone infiltrating macro-metastasis and disseminated multi-organ micro-metastases presenting with mono-symptomatic vertigo – a clinico-pathological case reporT

JARABIN András János, KLIVÉNYI Péter, TISZLAVICZ László, MOLNÁR Anna Fiona, GION Katalin, FÖLDESI Imre, KISS Geza Jozsef, ROVÓ László, BELLA Zsolt

Although vertigo is one of the most common complaints, intracranial malignant tumors rarely cause sudden asymmetry between the tone of the vestibular peripheries masquerading as a peripheral-like disorder. Here we report a case of simultaneous temporal bone infiltrating macro-metastasis and disseminated multi-organ micro-metastases presenting as acute unilateral vestibular syndrome, due to the reawakening of a primary gastric signet ring cell carcinoma. Purpose – Our objective was to identify those pathophysiological steps that may explain the complex process of tumor reawakening, dissemination. The possible causes of vestibular asymmetry were also traced. A 56-year-old male patient’s interdisciplinary medical data had been retrospectively analyzed. Original clinical and pathological results have been collected and thoroughly reevaluated, then new histological staining and immunohistochemistry methods have been added to the diagnostic pool. During the autopsy the cerebrum and cerebellum was edematous. The apex of the left petrous bone was infiltrated and destructed by a tumor mass of 2x2 cm in size. Histological reexamination of the original gastric resection specimen slides revealed focal submucosal tumorous infiltration with a vascular invasion. By immunohistochemistry mainly single infiltrating tumor cells were observed with Cytokeratin 7 and Vimentin positivity and partial loss of E-cadherin staining. The subsequent histological examination of necropsy tissue specimens confirmed the disseminated, multi-organ microscopic tumorous invasion. Discussion – It has been recently reported that the expression of Vimentin and the loss of E-cadherin is significantly associated with advanced stage, lymph node metastasis, vascular and neural invasion and undifferentiated type with p<0.05 significance. As our patient was middle aged and had no immune-deficiency, the promoting factor of the reawakening of the primary GC malignant disease after a 9-year-long period of dormancy remained undiscovered. The organ-specific tropism explained by the “seed and soil” theory was unexpected, due to rare occurrence of gastric cancer to metastasize in the meninges given that only a minority of these cells would be capable of crossing the blood brain barrier. Patients with past malignancies and new onset of neurological symptoms should alert the physician to central nervous system involvement, and the appropriate, targeted diagnostic and therapeutic work-up should be established immediately. Targeted staining with specific antibodies is recommended. Recent studies on cell lines indicate that metformin strongly inhibits epithelial-mesenchymal transition of gastric cancer cells. Therefore, further studies need to be performed on cases positive for epithelial-mesenchymal transition.

Clinical Neuroscience

Neuroscience highlights: Main cell types underlying memory and spatial navigation

KRABOTH Zoltán, KÁLMÁN Bernadette

Interest in the hippocampal formation and its role in navigation and memory arose in the second part of the 20th century, at least in part due to the curious case of Henry G. Molaison, who underwent brain surgery for intractable epilepsy. The temporal association observed between the removal of his entorhinal cortex along with a significant part of hippocampus and the developing severe memory deficit inspired scientists to focus on these regions. The subsequent discovery of the so-called place cells in the hippocampus launched the description of many other functional cell types and neuronal networks throughout the Papez-circuit that has a key role in memory processes and spatial information coding (speed, head direction, border, grid, object-vector etc). Each of these cell types has its own unique characteristics, and together they form the so-called “Brain GPS”. The aim of this short survey is to highlight for practicing neurologists the types of cells and neuronal networks that represent the anatomical substrates and physiological correlates of pathological entities affecting the limbic system, especially in the temporal lobe. For that purpose, we survey early discoveries along with the most relevant neuroscience observations from the recent literature. By this brief survey, we highlight main cell types in the hippocampal formation, and describe their roles in spatial navigation and memory processes. In recent decades, an array of new and functionally unique neuron types has been recognized in the hippocampal formation, but likely more remain to be discovered. For a better understanding of the heterogeneous presentations of neurological disorders affecting this anatomical region, insights into the constantly evolving neuroscience behind may be helpful. The public health consequences of diseases that affect memory and spatial navigation are high, and grow as the population ages, prompting scientist to focus on further exploring this brain region.

Clinical Neuroscience

EEG-based connectivity in patients with partial seizures with and without generalization

DÖMÖTÖR Johanna, CLEMENS Béla, EMRI Miklós, PUSKÁS Szilvia, FEKETE István

Objective - to investigate the neurophysiological basis of secondary generalization of partial epileptic seizures. Patients and methods - inter-ictal, resting-state EEG functional connectivity (EEGfC) was evaluated and compared: patients with exclusively simple partial seizures (sp group) were compared to patients with simple partial and secondary generalized seizures (spsg group); patients with exclusively complex partial seizures (cp group) were compared to patients with cp and secondary generalized seizures (cpsg group); the collapsed sp+cp group (spcp) was compared to those who had exclusively secondary generalized seizures (sg group). EEGfC was computed from 21-channel waking EEG. 3 minutes of waking EEG background activity was analyzed by the LORETA Source Correlation (LSC) software. Current source density time series were computed for 23 pre-defined cortical regions (ROI) in each hemisphere, for the 1-25 Hz very narrow bands (1 Hz bandwidth). Thereafter Pearson correlation coefficients were calculated between all pairs of ROI time series in the same hemisphere. Z-scored correlation coefficients were compared at the group level (t-tests and correction for multiple comparisons by local false discovery rate, FDR). Results - Statistically significant (corrected p<0.05) EEGfC differences emerged at specific frequencies (spsg > sg; cpsg > cp), and at many frequencies (sg > spcp). The findings indicated increased coupling between motor cortices and several non-motor areas in patients with partial and sg seizures as compared to patients with partial seizures and no sg seizures. Further findings suggested increased coupling between medial parietal-occipital areas (structural core of the cortex) and lateral hemispheric areas. Conclusion - increased inter-ictal EEGfC is associated with habitual occurrence of secondary generalized seizures.

LAM KID

[New findings in the cortical bone biology and its role in bone fractures]

BALOGH Ádám, BHATTOA Harjit Pál

[The authors surveyed the already known factors responsible for the osteoporotic bone fragility. Then the results of using modern imaging techniques (micro-CT, high-resolution peripheral computed quantitative tomograph - HR-pQCT) and advanced computer analytic methods (finite element analysis, FEA) are presented. These data - beyond the already known fracture risk factors (age, risk of falling, bone mineral density - BMD, and fine structure damage of trabecular bone) are stressing the importance of the (micro)damage of cortical bone as a fracture risk factor, which has been still underrated. The cortical thickening and increased porosity - verified on various population samples - are increasing the risk of fractures in certain subgroups of subjects having identical BMD values, even among those, who are considered only osteopenic by the earlier classification based on BMD values. Backed with modern software batteries, the new imaging techniques are expected to enter clinical application in the near future. Pharmacologic agents with stronger cortical effect are already available and research is continuing to find new drugs to use in the management of osteoporotic patients of high fracture risk.]

Lege Artis Medicinae

[Avoiding unlimited energy drink consumption is a matter of our heart]

DOJCSÁKNÉ Kiss-Tóth Éva

[Energy drinks have been gaining unbroken popularity, especially among youngsters and children since they were introduced to the market. Manufacturers promise to improve performance and stamina with consuming the products, classified as non-alcoholic soft drinks. In addition to the vitamins and plant extracts, they contain a significant amount of caffeine and other stimulants (taurine, guarana). Among the active ingredients, caffeine has an outstanding effect and thereby a danger, since its overconsumption – in addition to milder he­mo­dynamic changes – can cause severe cardio­vascular consequences, cardiac arrhythmias, ion channel diseases, increased blood coagulation, myocardial infarction or reduced cerebral blood flow in susceptible consumers. Many case studies have also reported serious cardiovascular attacks among young chronic energy drink consumers. Health impairments of excessive and long-term consumption of energy drinks have been studied increasingly, however there is limited and contradictory evidence on the safety of consumption and the effectiveness of performance enhancement. ]