Giordano Invernizzi

Cross validation of the factor structure of the 20-item Toronto Alexithymia Scale: An Italian multicenter study

The 20-item Toronto Alexithymia Scale (TAS-20) has been shown in previous research to measure a general dimension of alexithymia with three intercorrelated factors. This study evaluated the reliability and factorial validity of an Italian translation of the TAS-20 in a group of normal adults (N = 206) and in a mixed group of medical and psychiatric outpatients (N = 642). Using confirmatory factor analyses, the previously established three-factor model of the TAS-20 was found to be replicable in both groups. In addition, the Italian TAS-20 demonstrated adequate estimates of internal reliability and test-retest reliability. Although evaluation of the convergent, discriminant, and concurrent validity of the TAS-20 is required in Italian populations, the present results support the use of the Italian translation of the scale for clinical and research purposes.

Plasma and Platelet Amino Acid Concentrations in Patients Affected by Major Depression and under Fluvoxamine Treatment

Plasma and platelet levels of 18 amino acids were measured in 29 outpatients (mean age ± SD 47.41 ± 10.85 years; 14 F, 15 M) affected by major depression (DSM IV) and in 28 healthy volunteers (mean age 42.46 ± 14.19 years; 12 F, 16 M). Plasma and platelet levels of amino acids tended to be higher in depressed patients than in healthy controls. In particular, glutamate, taurine and lysine plasma levels and aspartate, serine and lysine platelet levels were significantly higher. Tryptophan/large neutral amino acids ratio (trp/LNAAs) was significantly lower in depressed patients. Fluvoxamine treatment did not influence plasma and platelet levels of amino acids or trp/LNAAs ratio.

In Vivo Serotonin 5HT2A Receptor Binding and Personality Traits in Healthy Subjects: A Positron Emission Tomography Study

Using positron emission tomography (PET) and [11C]raclopride, an association between striatal D2 dopamine receptors and emotional detachment has been recently reported. Several laboratory findings indicate a link between the serotoninergic system and harm avoidance. In this study we investigated, in a group of healthy volunteers, the relationship between the in vivo binding of 3-(2′-[18F]fluoroethyl)spiperone ([18F]FESP) to cortical 5HT2 and striatal D2 receptors and three personality dimensions, i.e., “novelty seeking,” “reward dependence,” and “harm avoidance.” Eleven healthy volunteers were evaluated by means of the Tridimensional personality Questionnaire (C. R. 11, Arch. Gen. Psychiatry 44: 573–588.) and underwent a PET scan with [18F]FESP. Harm avoidance showed a significant inverse correlation with [18F]FESP binding in the cerebral cortex, particularly in the frontal cortex (R2 = −0.709, P = 0.0145) and left parietal cortex (R = −0.629, P = 0.038) but not in the basal ganglia (r = −0.176, P = 0.651). Similar results were obtained using SPM at a P threshold of 0.05. No significant correlation was observed with novelty seeking or reward dependence. In the cerebral cortex, high values of [18F]FESP binding values are associated with a high tendency to avoid danger, indicating involvement of the serotoninergic system and, in particular, 5HT2A receptors, in this trait of personality. The results of this as well as of previous studies on personality dimensions indicate the existence of a relationship between behavioral and neurobiological factors. In addition these results support the concept that the variability of PET data may be explained by neurochemical differences related to the prevalence of specific personality traits.

Traditional Chinese acupuncture in tension-type headache: a controlled study

&NA; Thirty patients with tension‐type headache were randomly chosen to undergo a trial of traditional Chinese acupuncture and sham acupuncture. Five measures were used to assess symptom severity and treatment response: intensity, duration and frequency of headache pain episodes, headache index and analgesic intake. The five measures were assessed during a 4 week baseline period, after 4 and 8 weeks of treatment, and 1, 6 and 12 months thereafter. Before the start of the study, each patient was administered the MMPI. Split‐plot ANOVAs showed that, compared to baseline, at 1 month after the end of treatment and for the 12 month follow‐up, the frequency of headache episodes, analgesic consumption and the headache index (but not the duration or intensity of headache episodes) significantly decreased over time; however, no difference between acupuncture and placebo treatment was found. No single MMPI scale predicted the response to treatment, but the mean MMPI profile of acupuncture non‐responders showed the presence of ‘Conversion V’.

Language and thought disorder in schizophrenia: brain morphological correlates

In this magnetic resonance imaging study, the authors analyzed the relationships between frontal and temporal lobe volumes, volumes of ventricular system subdivisions and clinical and neuropsychological aspects of language and thought disorder in a group of 19 young schizophrenic patients. Schizophrenics showed enlargement of lateral ventricles, especially of the central and occipital segments compared with 15 age and sex matched healthy controls but no differences were present in prefrontal, temporal lobe and superior temporal gyrus volumes. Prefrontal volume was inversely correlated with Thought, Language and Communication (TLC) scale total scores; left superior temporal gyral (STG) volume was positively correlated with verbal fluency test performance; higher total ventricular volume was significantly correlated with poor performance to a sentence generation test; STG laterality index was correlated with global TLC scores, the more severe the thought and language disorders, the relatively smaller the left and larger the right STG. These results suggest a complex neuroanatomical substrate for thought and language disorders in schizophrenia.

A linkage study of schizophrenia to markers within Xp11 near the MAOB gene

A sex chromosome locus for psychosis has been considered on the basis of some sex differences in genetic risk and expression of illness, and an association with X-chromosome anomalies. Previous molecular genetic studies produced weak evidence for linkage of schizophrenia to the proximal short arm of the X-chromosome, while some other regions were not ruled out. Here we report an attempt to expand the Xp findings in: (i) a multicenter collaboration focusing on 92 families with a maternal pattern of inheritance (Study I), and (ii) an independent sample of 34 families unselected for parental mode of transmission (Study II). In the multicenter study, a parametric analysis resulted in positive lod scores (highest of 1.97 for dominant and 1.19 for recessive inheritance at a theta of 0.20) for locus DXS7, with scores below 0.50 for other markers in this region (MAOB, DXS228, and ARAF1). Significant allele sharing among affected sibling pairs was present at DXS7. In the second study, positive lod scores were observed at MAOB (highest of 2.16 at a theta of 0.05 for dominant and 1.64 at a theta of 0.00 for recessive models) and ALAS2 (the highest of 1.36 at a theta of 0.05 for a recessive model), with significant allele sharing (P = 0.003 and 0.01, respectively) at these two loci. These five markers are mapped within a small region of Xp11. Thus, although substantial regions of the X-chromosome have been investigated without evidence for linkage being found, a locus predisposing to schizophrenia in the proximal short arm of the X-chromosome is not excluded.

Stability of cerebral ventricular size from the appearance of the first psychotic symptoms to the later diagnosis of schizophrenia

We report preliminary evidence that ventricular size is static in the period between the emergence of the first psychotic symptoms and the subsequent diagnosis of schizophrenia

Catechol-O-Methyltransferase Val158Met Polymorphism in Schizophrenia: Associations with Cognitive and Motor Impairment

Cognitive and motor deficits have been proposed as markers of abnormal neurodevelopment in schizophrenia and have been associated with genetic liability. In a multicenter study involving 106 subjects, 56 with deficit schizophrenia and 50 with nondeficit schizophrenia, we tested the hypothesis that the catechol-O-methyltransferase (COMT) Val158Met polymorphism is associated with cognitive and motor deficits either in schizophrenia as a whole or in its deficit subtype. The COMT Val158Met polymorphism shared 6.6% of the executive/attention dysfunction variance in patients with schizophrenia and 15.6% of the motor impairment variance in patients with deficit schizophrenia. These results support the hypothesis that the COMT Val158Met polymorphism influences executive functions in schizophrenia and the neuromotor performance in the deficit subtype only.

COMT Val158Met and BDNF C270T polymorphisms in schizophrenia: a case-control study

Abstract In a multicenter study involving 217 subjects of European ancestry [106 patients with schizophrenia and 111 healthy subjects], we tested the hypothesis that the catechol- O -methyl transferase (COMT) Val 158 Met and/or the brain-derived neurotrophic factor (BDNF) C 270 T gene polymorphisms are associated with schizophrenia. The COMT and BDNF genotype and their allele distribution did not differ between patients with schizophrenia and healthy comparison subjects. These results do not support the hypothesis that the COMT Val 158 Met or BDNF C 270 T gene polymorphisms are associated with liability to schizophrenia.

Alexithymia and obesity. Study of the impaired symbolic function by the Rorschach test.

Many authors consider alexithymia a predisposing factor to psychosomatic and somatopsychic pathologies. In this study we investigated the presence of alexithymic characteristics in a group of 106 massive obese patients who requested a surgical intervention. 6 Rorschach alexithymia variables in the protocols of patients and a non-patient reference group (n = 600) were studied. Findings supported the presence of a striking alexithymic element among severely obese patients in comparison with their lean counterparts.