Lege Artis Medicinae

[In the focus: sleep disturbances]

HALÁSZ Péter, SZŰCS Anna

JANUARY 21, 2006

Lege Artis Medicinae - 2006;16(01)

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Lege Artis Medicinae

[People get fat - fats die out]

NAGY Viktor

Lege Artis Medicinae

[Forum for sleep disturbances]

KRAMER Imre

Lege Artis Medicinae

[MODERN PRINCIPLES OF EARLY DETECTION, DIAGNOSIS AND TREATMENT IN LUNG CANCER]

OSTOROS Gyula, KOVÁCS GÁBOR, BÖSZÖRMÉNYI Nagy György, STRAUSZ János

[New clinical guidelines for the diagnosis and treatment of lung cancer contain important advancements. It is necessary therefore that these novelties are widely known by health care professionals. With an existing X-ray screening network in Hungary, we have a unique chance to discover lung malignancies in an early stage in the population. Annual screening is recommended in risk groups over 40 years of age using a nation wide established digital screening network technology. In the therapy of small cell lung cancer there has been no major advance in the past ten years. However, by today, the number of small cell lung cancer patients represent only about 15% of all lung cancer cases. There have been advancements in other fields of the therapy of non small cell lung cancer. Third generation cytotoxic agents used in a platinum based chemotherapy protocol improved quality of life, response rate and survival time. Radiochemotherapy used in locally advanced stages also represented a step forward. In early stage of non small cell lung cancer it has been revealed that significantly improved survival time can be reached with adjuvant combined cytotoxic chemotherapy. Based on these results adjuvant chemotherapy became part of the therapeutic protocol. The use of molecular targeted chemotherapy in the clinical practice of non small cell lung cancer treatment is also a novelty. New therapeutic approaches are epidermal growth factor inhibitors, angiogenesis inhibitors, antivascular, signal transduction modifiers, apoptosis inducing, eicosanoid signal transduction modifiers and immunotherapeutic drugs. Placebo controlled trials have proved the effectiveness of the epidermal growth factor tyrosine kinase inhibitor erlotinib in the second and third line therapy of non small cell lung cancer and can be administered in the European Union in this indication. The improvement in the complex care of lung cancer patients in Hungary is characterized by the gradual increase in the prevalence data, meaning the gradual increase of the number of lung cancer patients still alive.]

Lege Artis Medicinae

[The Mouldy Lizard The Depiction of Diphtheria in 20th Century Hungarian Prose]

PINTÉR László

Lege Artis Medicinae

[A RARE CAUSE OF CYANOSIS - A CASE REPORT ON SULFHEMOGLOBINEMIA]

HARANGI Mariann, MÁTYUS János, NAGY Erzsébet, NAGY Emőke, PARAGH György, BALLA József, OLÁH V. Anna

[INTRODUCTION - Sulfhemoglobinemia (SHb) is an uncommon cause of cyanosis that is predominantly caused by drugs in adults. CLINICAL CASE - We report on an unusual case of sodium sulfate induced sulfhemoglobinemia in a 61-year-old woman after surgical polypectomy. Fractional hemoglobin derivates were assayed by spectrophotometry and high-performance liquid chromatography (HPLC). The sulfhemoglobinemia ratio was 8.6% in the first sample, and 3.77% a month later measured by spectrophotometry. In the hemolysate a new peak was identified as sulfhemoglobinemia by HPLC. It showed the presence of 9.37% sulfhemoglobinemia in the first sample and 4.88% a month later. After omitting the suspected toxic agent the cyanosis decreased significantly. CONCLUSIONS - The findings underline the importance of routine sulfhemoglobinemia analysis in cases of cyanosis of unknown origin.]

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[The role of sleep in the relational memory processes ]

CSÁBI Eszter, ZÁMBÓ Ágnes, PROKECZ Lídia

[A growing body of evidence suggests that sleep plays an essential role in the consolidation of different memory systems, but less is known about the beneficial effect of sleep on relational memory processes and the recognition of emotional facial expressions, however, it is a fundamental cognitive skill in human everyday life. Thus, the study aims to investigate the effect of timing of learning and the role of sleep in relational memory processes. 84 young adults (average age: 22.36 (SD: 3.22), 21 male/63 female) participated in our study, divided into two groups: evening group and morning group indicating the time of learning. We used the face-name task to measure relational memory and facial expression recognition. There were two sessions for both groups: the immediate testing phase and the delayed retesting phase, separated by 24 hours. 84 young adults (average age: 22.36 (SD: 3.22), 21 male/63 female) participated in our study, divided into two groups: evening group and morning group indicating the time of learning. We used the face-name task to measure relational memory and facial expression recognition. There were two sessions for both groups: the immediate testing phase and the delayed retesting phase, separated by 24 hours. Our results suggest that the timing of learning and sleep plays an important role in the stabilizing process of memory representation to resist against forgetting.]

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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

[Effect of two month positive airway pressure therapy on the structure of sleep, cognitive function and anxiety]

CSÁBI Eszter, VÁRSZEGI Mária, SEFCSIK Tamás, NÉMETH Dezsõ

[Obstructive sleep apnea is a common disorder, characterized by repeated episodes of upper airway obstruction during sleep, resulting intermittent hypoxia and disruption of the normal sleep pattern, which caused cognitive dysfunction in these patients. Nasal continuous positive airway pressure is the treatment of choice for this disorder. The aim of the study is to evaluate the effect of short-term positive airway pressure on sleep pattern (polisomnographic measures), cognitive function and anxiety. Twenty four newly diagnosed and previously untreated patients with obstructive sleep apnea were evaluated a battery of neuropsychological tests before and after 2 and a half months of the treatment. We focused on working memory, short and long-term episodic memory, executive functions, anxiety and subjective sleepiness. Our results showed that the two and half month of treatment improved the respiration during sleep, sleep pattern and the subjective sleepiness. We found improvement in short- and long-term verbal memory, and complex working memory. Despite of treatment we did not find improvement in visuospatial learning. These results reveal that 2 and a half months of positive airway pressure treatment restored not only the normal respiration during sleep and normal sleep pattern, but also the cognitive functions. Our study suggests that cognitive dysfunction is at least partial reversible in obstructive sleep apnea patients after positive airway pressure treatment.]

Clinical Neuroscience

Restless leg syndrome frequency in health workers

ÖCAL Ruhsen, ATGÜDEN Gizem, AYCAN Cagri, BALABAN Zeynep, SENAR Seran, YAVUZ Sena

Introduction - Restless Leg Syndrome (RLS) is a disease, primarily composed of sensational symptoms, caused by the urge to move lower extremities especially at night, and characterized by undesired feelings of the legs. Decreasing of the dopaminergic effect at night is thought to be responsible from these symptoms. RLS patients suffer from low quality of sleep affecting their daily life activities even causing socio-economic loss. Although RLS is a common and treatable disease, it can not be diagnosed easily due to the variability of symptoms. Aim - The purpose of this study is to determine the frequency of RLS among health workers and to define the disease causing factors. Method - A questionnaire was applied to 174 randomly selected health workers at Baskent University Medical Faculty (KA17/285). The demographic information, history of illnesses or usage of drugs, socioeconomic status, working hours and daytime sleepiness were questioned. Included in the questionnaire were diagnostic criteria for RLS, frequency assessment scale, and survey of sleep quality. We used “the diagnostic criteria of international RLS working group” for the diagnosis, and “Pittsburgh sleep quality index survey” to determine the quality of sleep. Reliability and validity studies were performed on both tests. Results - A significant relationship between socio-economic status and RLS was found (p<0.05) as an increase of RLS frequency in parallel with decreased socio-economic status. RLS was found to be common among health workers. We suggest that health workers should be checked regularly, and they should be informed about the disease in order to raise an awareness and hence increase their quality of life.

Clinical Neuroscience

The methylation status of NKCC1 and KCC2 in the patients with refractory temporal lobe epilepsy

UNAL Yasemin, KARA Murat, GENC Fatma, OZTURK Aslan Dilek, GÖMCELI Bicer Yasemin, KAYNAR Taner, TOSUN Kursad, KUTLU Gülnihal

Purpose - Methylation is a key epigenetic modification of DNA and regarding its impact on epilepsy, it is argued that “DNA methylation may play an important role in seizure susceptibility and maintenance of the disorder”. DNA methylation status of KCC2 (SCL12A5) and NKCC1 (SCL12A2) associated with refractory temporal lobe epilepsy was investigated in our study. Materials and methods - Thirty-eight patients with temporal lobe epilepsy (TLE) who were diagnosed by video EEG monitoring and 32 healthy control subjects were included in the study. Twenty-three patients in TLE group were men and the remaining 15 were women. Among them, 27 had unilateral temporal focus (9 with right; 18 with left) and 11 patients had bilateral TLE. We analyzed promoter region methylation status of the KCC2 (SCL12A5) and NKCC1 (SCL12A2) genes in the case and control groups. Gene regions of interest were amplified through PCR and sequencing was accomplished with pyro-sequencing. Results - We found a significant relationship between TLE and methylation on the NKCC1. However, there was no association between TLE and methylation on the KCC2 gene. Also, we found no association between right or left and unilateral or bilateral foci of TLE. There was no relationship between TLE and methylation on the NKCC1and KCC2 genes in terms of mesial temporal sclerosis in cranial MRI, head trauma or febrile convulsions. Conclusion - The methylation of NKCC1 can be a mecha­nism of refractory temporal lobe epilepsy. There are limited findings about DNA methylation in TLE. Therefore, further studies with large sample sizes are necessary.