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Clinical Neuroscience

SEPTEMBER 30, 2020

TLR4 (Toll-like receptor-4) expression and frontal-cingulate volumes in schizophrenia

LI Hua, KÉRI Szabolcs

Evidence suggests that pathogen-associated pattern recognition receptors (Toll-like receptors, TLRs) are implicated in the pathophysiology of schizophrenia. TLRs are important in both peripheral immune responses and neuronal plasticity. However, the relationship between peripheral TLR expression and regional brain volumes is unknown in schizophrenia. We therefore assessed 30 drug-naïve, first-episode patients with schizophrenia. TLR4+/TLR1+ monocytes were measured using flow-cytometry. High resolution magnetic resonance images (T1 MRI) were obtained and analyzed with FreeSurfer. Results revealed significant negative correlations between the percentage of TLR4+ monocytes, mean fluorescent intensities, and brain volumes in frontal and anterior cingulate regions. The measures of TLR1+ monocytes did not show significant relationships with regional brain volumes. These results raise the possibility that abnormal TLR-activation is associated with decreased brain volumes in schizophrenia.

Clinical Neuroscience

JANUARY 30, 2016

[Event-related potentials and clinical symptoms in schizophrenia]

DOMJÁN Nóra, CSIFCSÁK Gábor, JANKA Zoltán

[The investigation of schizophrenia’s aetiology and pathomechanism is of high importance in neurosciences. In the recent decades, analyzing event-related potentials have proven to be useful to reveal the neuropsychological dysfunctions in schizophrenia. Even the very early stages of auditory stimulus processing are impaired in this disorder; this might contribute to the experience of auditory hallucinations. The present review summarizes the recent literature on the relationship between auditory hallucinations and event-related potentials. Due to the dysfunction of early auditory sensory processing, patients with schizophrenia are not able to locate the source of stimuli and to allocate their attention appropriately. These deficits might lead to auditory hallucinations and problems with daily functioning. Studies involving high risk groups may provide tools for screening and early interventions; thus improving the prognosis of schizophrenia. ]

Lege Artis Medicinae

OCTOBER 20, 2019

[Population-level QALY gain estimates with the use of cariprazine for patients with negative symptoms of schizophrenia in Hungary]

BENDES Rita, NÉMETH Bertalan, PITTER János György, KÓCZIÁN Kristóf, GÖTZE Árpád, KALÓ Zoltán

[INTRODUCTION - The loss in quality of life caused by mental illnesses has been growing in developed countries. This study aims to quantify the possible gains in quality of life by advantages of cariprazine therapy while treating patients with negative symptoms of schizophrenia in Hungary. Comparator therapy was defined as the currently available second-generation oral antipsychotic drugs. METHODS - In order to estimate the reachable gain in quality of life with cariprazine, an 8-state deterministic Markov cohort model was developed. Data was gathered from relevant scientific literature and public databases. The main assumptions regarding patient pathways have been validated by clinical experts, based on their real-life experience. The number of patients with negative symptoms of schizophrenia was estimated by the same methods as well. Sensitivity analyses were conducted on the input parameters. RESULTS - When compared with currently available second-generation oral antipsychotics, cariprazine generated an estimated increase of 0.05 quality-adjusted life years per patient in 2 years run. The deterministic sensitivity analysis confirmed the robustness of the results. Based on data of the National Health Insurance Fund and the scientific literature, a total gain of 450 quality-adjusted life years is expected at national level over a time horizon of 2 years. Even higher gains of QALY can be expected for longer time horizons. CONCLUSION - Based on conservative estimates significant health gain can be ge­ne­rated, if all patients with negative symp­toms of schizophrenia would receive the adequate cariprazine therapy in Hungary in­stead of the currently used se­cond-ge­ne­ration oral antipsychotic drugs. ]

Lege Artis Medicinae

JANUARY 20, 2020

[Clozapine - the last resort antipsychotic for treatment resistant schizophrenia ]

SZEKERES György

[More than 60 years old is the first antipschychotic drug that is operating atypically as well. With its multifarious history it gained the golden standard title of all therapy resistent schisophrenic cases for the last three decades. In this article we place clozapine on the map of psychopharmacology and review its history’s most important chapters. In the third part we discuss some of the most relevant effects and side effects of clozapine in the light of latest research and practical considerations touching the problem of the optimal start timing. ]

Clinical Neuroscience

NOVEMBER 30, 2019

[Tracing trace elements in mental functions]

JANKA Zoltán

[Trace elements are found in the living organism in small (trace) amounts and are mainly essential for living functions. Essential trace elements are in humans the chromium (Cr), cobalt (Co), copper (Cu), fluorine (F), iodine (I), iron (Fe), manganese (Mn), molybdenum (Mo), selenium (Se), zinc (Zn), and questionably the boron (B) and vanadium (V). According to the biopsychosocial concept, mental functions have biological underpinnings, therefore the impairment of certain neurochemical processes due to shortage of trace elements may have mental consequences. Scientific investigations indicate the putative role of trace element deficiency in psychiatric disorders such in depression (Zn, Cr, Se, Fe, Co, I), premenstrual dysphoria (Cr), schizophrenia (Zn, Se), cognitive deterioration/de­mentia (B, Zn, Fe, Mn, Co, V), mental retardation (I, Mo, Cu), binge-eating (Cr), autism (Zn, Mn, Cu, Co) and attention deficit hyperactivity disorder (Fe). At the same time, the excess quantity (chronic exposure, genetic error) of certain trace elements (Cu, Mn, Co, Cr, Fe, V) can also lead to mental disturbances (depression, anxiety, psychosis, cognitive dysfunction, insomnia). Lithium (Li), being efficacious in the treatment of bipolar mood disorder, is not declared officially as a trace element. Due to nutrition (drinking water, food) the serum Li level is about a thousand times less than that used in therapy. However, Li level in the red cells is lower as the membrane sodium-Li countertransport results in a Li efflux. Nevertheless, the possibility that Li is a trace element has emerged as studies indicate its potential efficacy in such a low concentration, since certain geographic regions show an inverse correlation between the Li level of drinking water and the suicide rate in that area. ]

Lege Artis Medicinae

SEPTEMBER 10, 2019

[Path of life in the society with a diagnosis of a psychiatric disease ]

BÁNYAI Borbála, LÉGMÁN Anna

[INTRODUCTION - The aim of our study is to show how people can live with a diagnosis of a psychiatric disease, a schizophrenia diagnosis in Hungary. METHODOLOGY - We made 25 narrative life story interviews with Hungarian people diagnosed with mental illnesses. We examined what the main obstacles and supporting factors may be in the life stories regarding the independent lifestyle and participation in community. RESULTS - According to the interviewees the main obstacles are their states or diseases, the stigmas after their diagnoses, the function of the psychiatric care system and the lack of self-reliance following the patient role. They mentioned the family and their own motivations as supporting factors. CONCLUSION - The examination of the institutional functions can reveal what the supporting factors may be which can facilitate the social participation of people diagnosed with mental illnesses on the level of the system. ]