Publications by authors named "Arkadiy Semke"

Metabolic syndrome (MetS) is a common comorbidity of schizophrenia and significantly shortens life expectancy of the patients. Intercellular (ICAM), vascular (VCAM), and neural (NCAM) cell adhesion molecules (CAMs) mediate neuroinflammatory processes, and their soluble forms (e.g.

View Article and Find Full Text PDF
Article Synopsis
  • - The study explores how genetic variations influencing the glutamatergic neurotransmitter system impact the development and clinical symptoms of schizophrenia in 805 Russian patients from Siberia.
  • - Three specific gene variants (rs11644461, rs8057394, rs7313149) are linked to a particular type of schizophrenia, with the rs8057394*G allele identified as a risk factor for this type.
  • - Additionally, another variant (rs62126236) shows a protective effect against negative symptoms, while overall symptom severity is significantly associated with yet another variant (rs9788936), indicating the role of genetic factors in schizophrenia's clinical diversity.
View Article and Find Full Text PDF
Article Synopsis
  • Immune activation and neuroinflammation are significant factors in the development of schizophrenia, supported by various studies and reviews.
  • A study measured levels of 22 cytokines in 236 schizophrenia patients and 103 healthy individuals, finding several cytokines elevated in patients with schizophrenia.
  • The research highlighted differences in cytokine levels based on sex and the duration of illness, suggesting that cytokine imbalances relate to both clinical features and the severity of schizophrenia symptoms.
View Article and Find Full Text PDF
Article Synopsis
  • Metabolic syndrome (MetS) is prevalent among individuals with schizophrenia, particularly worsened by long-term use of atypical antipsychotic medications.
  • A study of 195 schizophrenia patients found that those with MetS had significantly higher leptin levels and lower ghrelin levels compared to those without MetS.
  • Insulin levels showed no significant difference between the two groups, and while some correlations between hormone levels and body characteristics were observed, they were more common in individuals without MetS, highlighting the distinct hormonal influences in this condition.
View Article and Find Full Text PDF
Article Synopsis
  • * In a study of 112 paranoid schizophrenia patients, 39 were identified with MetS; those with MetS had elevated levels of specific acylcarnitines and branched-chain amino acids compared to those without MetS.
  • * The research indicated lower levels of certain carnitines in schizophrenia patients versus healthy individuals, suggesting that antipsychotic medications might impact energy metabolism by affecting a key enzyme responsible for fat metabolism.
View Article and Find Full Text PDF

This study aimed to evaluate the superoxide dismutase (SOD) activity of IgG in patients with schizophrenia. After signing informed consent, we included 67 patients with schizophrenia (34 people with acute schizophrenia and 33 individuals were on outpatient treatment in therapeutic remission) and 14 healthy volunteers. IgGs from blood serum were isolated by affinity chromatography.

View Article and Find Full Text PDF
Article Synopsis
  • Metabolic syndrome is common among schizophrenia patients on long-term antipsychotic treatment, which can result from the effects of dopamine D2 receptors.
  • The study analyzed 517 schizophrenia patients in Siberia, focusing on two specific genetic variations in the DRD2 gene and their link to metabolic syndrome.
  • Findings suggest that a particular variation (rs1799732) is associated with drug-induced metabolic syndrome in women, pointing to the potential for targeted genetic treatments to improve patient outcomes.
View Article and Find Full Text PDF

Background: Metabolic syndrome (MetS) is a common complication of long-term treatment of persons with schizophrenia taking (atypical) antipsychotics. In this study, we investigated the existence of an association with polymorphisms of genes for four hormones that regulate energy metabolism.

Methods: We recruited 517 clinically admitted white patients (269M/248F) with a verified diagnosis of schizophrenia (ICD-10) and with a stable physical condition.

View Article and Find Full Text PDF

Purpose: Metabolic syndrome (MetS) is characterized by abdominal obesity, hyperglycaemia, dyslipidaemia and hypertension. FTO gene has been implicated in the pathogenesis of obesity, but the available scientific data concerning their relationship to antipsychotic drug-induced obesity and metabolic syndrome is still incomplete and inconsistent, which indicates that continuing the investigation of this gene's role is necessary.

Patients And Methods: In the present study, 517 patients with schizophrenia underwent antipsychotic drug treatment, and two groups were identified: patients with MetS and without MetS.

View Article and Find Full Text PDF

The purpose of this study was to compare the prevalence of MetS and the associated sociodemographic, clinical, and pharmacotherapeutic characteristics of patients with schizophrenia in three psychiatric hospitals in the West Siberian region. Patients with a clinical diagnosis of schizophrenia (ICD-10: F20) and an age between 18 and 60 years were included in the study after giving informed consent. Metabolic syndrome was diagnosed according to the International Diabetes Federation criteria.

View Article and Find Full Text PDF

Myelin deficiency is commonly recognized as an important pathological feature of brain tissues in schizophrenia (SZ). In this pilot study, global myelin content abnormalities in white matter (WM) and gray matter (GM) of SZ patients were non-invasively investigated using a novel clinically-targeted quantitative myelin imaging technique, fast macromolecular proton fraction (MPF) mapping. MPF maps were obtained from 23 healthy subjects and 31 SZ patients using a clinical 1.

View Article and Find Full Text PDF

Background: Antipsychotic-induced metabolic syndrome (MetS) is a multifactorial disease with a genetic predisposition. Serotonin and its receptors are involved in antipsychotic-drug-induced metabolic disorders. The present study investigated the association of nine polymorphisms in the four 5-hydroxytryptamine receptor () genes , , , and and the gene encoding for the serotonin transporter with MetS in patients with schizophrenia.

View Article and Find Full Text PDF

Amino acids and acylcarnitines play an important role as substrates and intermediate products in most of pathways involved in schizophrenia development such as mitochondrial dysfunction, inflammation, lipid oxidation, DNA damage, oxidative stress, and apoptosis. It seems relevant to use an integrated approach with 'omics' technology to study their contribution. The aim of our study was to investigate serum amino acid and acylcarnitine levels in antipsychotics-treated patients with chronic schizophrenia compared with healthy donors.

View Article and Find Full Text PDF

The adipokines leptin, adiponectin, tumor necrosis factor-alpha (TNF-α), and interleukin 6 (IL-6) might be associated with metabolic syndrome (MetS) in patients with schizophrenia. In the present study, we attempted to confirm the results of previous reports and assessed their MetS-related correlation with body fat composition and biochemical parameters. We measured in 46 patients with schizophrenia and MetS serum levels of adiponectin insulin, leptin, TNF-α and IL-6 and compared these levels to those of patients with schizophrenia without MetS.

View Article and Find Full Text PDF

In the present study we conducted a genome-wide association study (GWAS) in a cohort of 505 patients with paranoid schizophrenia (SCZ), of which 95 had tardive dyskinesia (TD), and 503 healthy controls. Using data generated by the PsychENCODE Consortium (PEC) and other bioinformatic databases, we revealed a gene network, implicated in neurodevelopment and brain function, associated with both these disorders. Almost all these genes are in gene or isoform co-expression PEC network modules important for the functioning of the brain; the activity of these networks is also altered in SCZ, bipolar disorder and autism spectrum disorders.

View Article and Find Full Text PDF
Article Synopsis
  • The study investigates the relationship between body fat, glucose and lipid levels, and thyroid hormone levels in schizophrenia patients from the Tomsk region, looking specifically at whether they have metabolic syndrome (MetS) or not.
  • It includes 156 patients with schizophrenia—56 with MetS and 100 without—compared against reference groups of both individuals with MetS who do not have schizophrenia and healthy individuals.
  • Findings show that schizophrenia patients with MetS had higher levels of thyroid hormones (FT3 and FT4) compared to those without MetS, indicating significant associations with MetS, sex, age, and lipid/glucose levels.
View Article and Find Full Text PDF
Article Synopsis
  • * Specifically, patients with acute schizophrenia showed a notably higher proteolytic activity of IgG compared to those in remission and healthy controls.
  • * The highest activity was observed in patients with continuous paranoid schizophrenia, suggesting that increased MBP-hydrolyzing antibody activity might be linked to heightened humoral immune responses during acute episodes of the disease.
View Article and Find Full Text PDF

Background: Tardive dyskinesia (TD) is a common side effect of antipsychotic treatment. This movement disorder consists of orofacial and limb-truncal components. The present study is aimed at investigating the role of serotonin receptors (HTR) in modulating tardive dyskinesia by genotyping patients with schizophrenia.

View Article and Find Full Text PDF

Background: Previous studies have linked muscarinic M4 receptors (CHRM4) to schizophrenia. Specifically, the rs2067482 polymorphism was found to be highly associated with this disease.

Purpose: To test whether rs2067482 and rs72910092 are potential risk factors for schizophrenia and/or pharmacogenetic markers for antipsychotic-induced tardive dyskinesia.

View Article and Find Full Text PDF

Background: Both dehydroepiandrosterone (DHEAS) and cortisol are secreted by the adrenal glands and may modulate metabolic syndrome (MetS), which often affects the health of patients with schizophrenia. The relationship between the serum levels of these hormones and MetS has not been established.

Purpose: In this pilot study, we investigated the serum levels in schizophrenia patients with and without MetS and compared them with those in healthy volunteers.

View Article and Find Full Text PDF

Introduction: Hyperprolactinaemia, a common adverse effect of antipsychotic drugs, is primarily linked to blockade of dopamine D2 receptors in the pituitary gland. Certain antipsychotic drugs, such as, for example risperidone and paliperidone, are more likely to induce hyperprolactinaemia compared to others. This effect is probably caused by a relatively high blood/brain concentration ratio, a consequence of being a substrate of P-glycoprotein.

View Article and Find Full Text PDF

Background: Schizophrenia is associated with a lowered life expectancy due to cardiovascular disease. This is, at least in part, related to an increased vulnerability to the development of metabolic syndrome (MetS) in patients with schizophrenia. The dysregulation of apolipoproteins (Apos) may also play a role in the pathogenesis of schizophrenia via their effect on cerebral cholesterol processing.

View Article and Find Full Text PDF

Background: Hyperprolactinemia (HPRL) is a classical side effect of antipsychotic drugs primarily attributed to blockade of dopamine D2 receptors (DRD2s) on the membranes of lactotroph cells within the pituitary gland. Certain antipsychotic drugs, e.g.

View Article and Find Full Text PDF
Article Synopsis
  • The study examined the role of AKT1 and GSK3B genes in the development of tardive dyskinesia (TD) among patients treated with antipsychotics for schizophrenia.
  • Researchers analyzed DNA samples from 449 Siberian patients and found no association between TD and specific polymorphisms in the AKT1 and GSK3B genes.
  • The findings suggest that these kinases might not be significant contributors to TD, indicating a need to explore other potential mechanisms for the condition, such as neurotoxicity related to dopamine.
View Article and Find Full Text PDF

Several different theories of schizophrenia (SCZ) were discussed; the causes of this disease are not yet clear. Using ELISA, it was shown that titers of autoantibodies against myelin basic protein (MBP) in SCZ patients are ~1.8-fold higher than in healthy individuals but 5.

View Article and Find Full Text PDF