The correlation between white matter integrity and pragmatic language processing in first episode schizophrenia.

OBJECTIVE: Higher-order language disturbances could be the result of white matter tract abnormalities. The study explores the relationship between white matter and pragmatic skills in first-episode schizophrenia. METHODS: Thirty-four first-episode patients with schizophrenia and 32 healthy subjects participated in a pragmatic language and Diffusion Tensor Imaging study, where fractional anisotropy of the arcuate fasciculus, corpus callosum and cingulum was correlated with the Polish version of the Right Hemisphere Language Battery. RESULTS: The patients showed reduced fractional anisotropy in the right arcuate fasciculus, left anterior cingulum bundle and left forceps minor. Among the first episode patients, reduced understanding of written metaphors correlated with reduced fractional anisotropy of left forceps minor, and greater explanation of written and picture metaphors correlated with reduced fractional anisotropy of the left anterior cingulum. CONCLUSIONS: The white matter dysfunctions may underlie the pragmatic language impairment in schizophrenia. Our results shed further light on the functional neuroanatomical basis of pragmatic language use by patients with schizophrenia.

Omega-3 fatty acid supplementation may prevent loss of gray matter thickness in the left parieto-occipital cortex in first episode schizophrenia: A secondary outcome analysis of the OFFER randomized controlled study.

The aim of the study was to assess changes in cortical thickness related to the use of n-3 polyunsaturated fatty acids (PUFA) as add-on therapy in patients with first episode schizophrenia. A double-blind randomized controlled study was conducted using a 26-week intervention composed of concentrated fish oil containing 2.2g/d of eicosapentaenoic (EPA) and docosahexaenoic acid (DHA) or placebo (olive oil). Participants underwent MRI scanning twice to assess changes in cortical thickness: at the beginning and at the end of intervention. Data of suitable quality was obtained from 29 participants. The T1-weighted images for each participant were analyzed using FreeSurfer methodology for longitudinal pipeline. Significant differences in cortical thickness loss were observed between the groups in the parieto-occipital regions of Brodmann areas 7 and 19 of the left hemisphere, dysfunctions in which may be involved in schizophrenia symptomatology. The results of the study support the previous observations carried out in older individuals and patients with mild cognitive impairment, indicating that n-3 PUFA may have neuroprotective properties, especially at early stages of neurodegenerative diseases, such as schizophrenia. If replicated, the results of the present study may encourage clinicians to consider n-3 PUFA as a promising addition to antipsychotics for long-term treatment of schizophrenia.

Evaluation of white matter structure changes, as assessed in tractography, and cognitive dysfunctions in patients with early onset schizophrenia and their first-degree relatives. / Ocena zaburzen struktury istoty bialej ocenianych w badaniach traktograficznych i zaburzen pamieci operacyjnej u chorych na schizofrenie o wczesnym poczatku i ich krewnych pierwszego stopnia.

OBJECTIVES: The aim of the project was to assess the differences in the white matter (WM) fiber structure between patients with early onset schizophrenia (EOS), their first degree relatives and controls using Fractional Anisotropy (FA), and an independent evaluation of the severity of working memory disturbances in the study groups. METHODS: The study included 20 patients diagnosed with paranoid EOS (diagnosed before the age of 18), a group of 20 parents of patients, matched for gender, and 18 healthy controls. All study participants were examined with Diffusion Tensor Imaging (DTI,1.5 T) and selected neuropsychological tests to assess working memory, immediate memory and attention (Trail Making Test parts A and B: TMT-A and TMT-B, Digit Span Forward and Backward). RESULTS: No significant differences in FA parameters were found between the analyzed groups. The group of patients took significantly longer to perform the TMT-A and TMT-B than the control group, and achieved worse outcomes in Digit Span tests. The relatives of the patients achieved lower scores in Digit Span tests and needed more time to perform TMT-B compared to controls. There were no significant differences between all groups in terms of the number of errors when performing TMT-A and TMT-B. CONCLUSIONS: The results of our study indicate a reduction in the capacity of immediate memory, working memory, cognitive plasticity and divided attention, both in EOS patients and their first degree relatives compared to healthy subjects. The reported neuropsychological deficits were not reflected in WM integrity, as assessed with FA.

[Internal capsule integrity and its sex-related structural differences in early-onset schizophrenia - diffusion tensor imaging study]. / Zaburzenia integralnosci torebki wewnetrznej oraz róznice strukturalne zalezne od plci w schizofrenii o wczesnym poczatku - badanie DTI.

OBJECTIVES: In schizophrenia, the most repeatable DTI findings concern reduced FA in temporal and frontal lobes with associated abnormalities in connecting neural fibers. The goal of study was to evaluate the differences in FA of the internal capsule in EOS-patients and healthy controls and to place emphasis on the sex as a potential factor determining a predominant pathological pattern of described changes. METHODS: 30 EOS patients and 30 healthy controls were studied using DTI. FA measures within internal capsules were performed in selected ROIs. For statistical analyses the one-way ANOVA test was used (p<0.05). RESULTS: Significant differences of FA between EOS-patients and controls in the right ALIC with lower values of FA in EOS were observed. Within the women sub-groups, statistical differences of FA were observed only for the right ALIC. There were no statistically significant differences within men sub-groups. CONCLUSIONS: 1. Statistically significant differences were found between EOS - subjects (subgroups of woman only) and the control group within the WM diffusivity of the brain in the right ALIC. 2. These results indicate possible involvement of the structures of internal capsule in the EOS development.

Omega-3 fatty acids in first-episode schizophrenia - a randomized controlled study of efficacy and relapse prevention (OFFER): rationale, design, and methods.

BACKGROUND: Polyunsaturated fatty acid (PUFA) metabolism abnormalities have been long implicated in the etiology of schizophrenia. Although several randomized clinical trials have been carried out to assess the efficacy of omega-3 PUFA as add-on therapy in reducing psychopathology in populations of chronic patients with schizophrenia, only a few concern first-episode schizophrenia. The majority of these studies used a 12-week intervention based on ethyl-eicosapentaenoic acid (ethyl-EPA), however, with conflicting results. An intervention based on docosahexaenoic acid plus EPA has not been used in first-episode schizophrenia studies so far. No add-on supplementation studies have been carried out in medicated first-episode schizophrenia patients to assess the efficacy of omega-3 PUFA in preventing relapses. METHODS: A randomized placebo-controlled one-center trial will be used to compare the efficacy of 26-week intervention, composed of either 1320 mg/day of EPA and 880 mg/day of DHA, or olive oil placebo with regard to symptom severity and relapse rate in first-episode schizophrenia patients. Eighty-two patients (aged 16-35) will be recruited for the study. Eligible patients will be randomly allocated to one of two intervention arms: an active arm or a placebo arm (olive oil). The primary outcome measure of the clinical evaluation is schizophrenia symptom severity measured by the Positive and Negative Syndrome Scale (PANSS). Other outcomes include depressive symptoms, patient functioning and the level of insight. Correlates of change measured during the study will include structural brain changes, oxidative stress and defense, as well as neuroplasticity indicators. Metabolic syndrome components will also be assessed throughout the study. DISCUSSION: By comparing 26-week administration of EPA + DHA or (placebo) olive oil as add-on therapy in reducing symptom severity and one-year relapse rate in patients with first episode schizophrenia, it is intended to provide new insights into the efficacy of omega-3 PUFA and correlates of change, and contribute to the improvement of mental health care for individuals suffering from schizophrenia. TRIAL REGISTRATION: This study has been registered at Clinical Trials.gov with the following number: NCT02210962 .

[Spinal cord diffusion tensor tractography as a diagnostic tool in difficult cases of spinal cord intramedullary tumours]. / Traktografia rdzenia jako metoda diagnostyczna w trudnych przypadkach guzów sródrdzeniowych.

Diffusion tensor-based spinal cord tractography is a technically complicated but rapidly evolving diagnostic method. The difficulties result from the volume of the spinal cord, the constant pulsing of the cerebrospinal fluid and respiratory movements. The method is being used more and more frequently to examine long spinal tracts in patients with intramedullary tumours. The method can be especially useful for ambiguous cases investigation. The presented case with coincidental intramedullary tumour and severe cervical spondylosis has been described by the authors to show their own experience with spinal cord tractography as a useful tool in determining an effective treatment method.