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Tetsuya Sato

Publications and source records attributed to Tetsuya Sato.

31 records · Page 2Linked to original sources
PubMed2003

Lack of association between serotonin 5-HT1B receptor gene polymorphism and suicidal behavior.

A genetic susceptibility to suicide attempts has been repeatedly suggested by family-, twin-, and adoption-studies. Because elevated impulsive aggression is one of the most prominent characteristics of suicide attempters and aggressive behavior has been reported in 5-HT1B receptor gene knockout mice, the serotonin receptor 1B gene (5-HT1B) is an attractive candidate. The distribution of a polymorphism (G861C) in the 5-HT1B gene was examined in 148 consecutively hospitalized German suicide attempters, and 327 German healthy volunteers randomly recruited from the general population. The controls and their first degree relatives had no history of mental disorders or suicidal behavior. We found no significant difference in allele or genotype frequency between patients and controls. The results did not differ when the patients were divided into several subgroups (gender, suicide attempters with a violent method or suicide attempters with unipolar-, bipolar-, borderline personality-, and schizophrenia spectrum disorders). These findings suggest that the 5-HT1B polymorphism is unlikely to play a major role in the genetic susceptibility to suicide attempts.

Adolescent↗
PubMed2003

Role of ultrasonography in treatment selection.

In spite of difficulties impacting objectivity and reproducibility due to its dependence on the technical and diagnostic ability of each examiner, ultrasonography (US) in general can evaluate very well soft tissue lesions, especially small lesions of 1 cm or less in size. US can reliably delineate the nature of several lesions, and can detect dilated mammary ducts and lymph nodes. On the other hand, US may miss ductal spread or lymph node metastasis of breast cancer, especially if the lesions are too minute to be detected by the instrument. US should be used together with X-ray or MR mammography to prevent false negative cases. US is useful for evaluating the local nature and characteristics of cancerous lesions such as size, invasiveness, histological type, intraductal spread etc, and can evaluate regional lymph node and liver metastasis for pre-treatment staging. In addition, US-guided techniques are essential for preoperative pathological diagnosis by FNAC or CNB and for marking the marginal line for partial mastectomy. US should be more actively used to monitor intra-mammary recurrence after breast conserving surgery.

Breast Neoplasms↗
PubMed2003

Negative symptoms in depressed and schizophrenic patients: how do they differ?

BACKGROUND: The present study evaluated differences in negative symptoms between schizophrenic and depressive patients and investigated whether a consideration of the nature of negative symptoms (enduring vs. nonenduring) can help to improve their specificity for schizophrenia. METHOD: Patients enrolled in the study were consecutively hospitalized with an acute exacerbation of schizophrenia (N = 33) or major depressive disorder (N = 43) (DSM-IV). Negative and depressive symptoms were assessed with the Scale for the Assessment of Negative Symptoms (SANS) and the Montgomery-Asberg Depression Rating Scale, respectively. Duration of negative symptoms was assessed through a semistructured interview with the patients and their closest relatives. On the basis of the assessed duration of symptoms, negative symptoms were categorized as enduring or nonenduring. RESULTS: Analyses revealed high SANS ratings for both diagnostic groups. Negative symptoms in depressive patients (p =.01), but not in schizophrenic patients, were significantly associated with the presence or the emergence of depressive symptoms. The prevalence of enduring negative symptoms was significantly higher in schizophrenic patients than in depressive patients (p <.01). A consideration of enduring negative symptoms significantly increased the discriminative power of negative symptoms for schizophrenia (p =.02). CONCLUSION: The present findings suggest that negative symptoms in most depressive patients are just an epiphenomenon of depressive symptoms and can be distinguished from schizophrenic negative symptoms.

Acute Disease↗
PubMed2003

[Uterine artery embolization for leiomyoma: complications and effects on fertility].

Uterine artery embolization (UAE) for leiomyoma is becoming accepted as an alternative to surgical treatment. However, gynecologists who have treated follow-up patients are greatly concerned about the postoperative course after UAE. One significant complication after UAE is infection owing to obstruction resulting from the sloughing of necrotic fibroids that interfere with the passage of intrauterine discharge. In our UAE procedures, the incidence of infection requiring hospitalization was 3.6%, and one patient (0.22%) had to undergo hysterectomy. Transcervical resection (TCR) using hysteroscopy is an extremely effective surgical intervention for removing necrotic fibroids for reserve of the uterus. However, additional treatment for intrauterine abnormalities after UAE may rest on whether or not the hysteroscopic procedure was performed. Although ovarian function after UAE seems to be maintained in patients < or = 44 years of age, serious complications include intrauterine adhesions that appear as amenorrhea or hypomenorrhea and lead to infertility. The results of our hysteroscopic evaluation after UAE in 7 patients who wished to conceive was intrauterine adhesion in four patients, subendometrial liner scar in one patient, and yellowing of the endometrium in three patients. However, in spite of impairment of the endometrium, the pregnancy rate after UAE in our study was 5/10(50.0%). It is essential that the indications of UAE for patients who wish to conceive be decided according to careful individual evaluation, and cautious follow-up is necessary.

Adult↗
PubMed2002

Repeated and sudden reversals of the dipole field generated by a spherical dynamo action.

Using long-duration, three-dimensional magnetohydrodynamic simulation, we found that the magnetic dipole field generated by a dynamo action in a rotating spherical shell repeatedly reverses its polarity at irregular intervals (that is, punctuated reversal). Although the total convection energy and magnetic energy alternate between a high-energy state and a low-energy state, the dipole polarity can reverse only at high-energy states where the north-south symmetry of the convection pattern is broken and the columnar vortex structure becomes vulnerable. Another attractive finding is that the quadrupole mode grows, exceeding the dipole mode before the reversal; this may help to explain how Earth's magnetic field reverses.

Journal Article↗
PubMed2002

The impact of duration of untreated psychosis and premorbid functioning on outcome of first inpatient treatment in schizophrenic and schizoaffective patients.

OBJECTIVE: The aim of the study was to investigate the association between the duration of untreated psychosis, premorbid functioning and outcome from first inpatient treatment in schizophrenic or schizoaffective patients. METHOD: The data of 196 first-hospitalized patients with a schizophrenic or schizoaffective disorder according to the ICD-10 criteria were analyzed using univariate and multivariate methods. Patients' characteristics were prospectively assessed using standardized instruments at the time of first admission and discharge. RESULTS: The analyses revealed that a duration of untreated psychosis longer than 12 months was independently and significantly associated with a poorer outcome from first inpatient treatment. Premorbid functioning might have an additional influence on outcome, but this influence seems to be dependent on the diagnostic category. CONCLUSIONS: The findings suggest that the duration of untreated psychosis is an independent prognostic factor for the outcome in schizophrenic and schizoaffective disorders.

Acute Disease↗
PubMed2002

Evaluating the state dependency of the Temperament and Character Inventory dimensions in patients with major depression: a methodological contribution.

BACKGROUND: Little is known as to whether or not the seven personality dimensions of Cloninger's theory, particularly the three character dimensions newly included in the theory, are independent of the states of depression. METHODS: One hundred and eight patients with major depression filled out the Temperament and Character Inventory (TCI) before and after a 16-week antidepressant treatment. RESULTS: The level of depression, as assessed by the Hamilton Rating Scale for Depression, was correlated positively to the harm avoidance score and negatively to the self-directedness and cooperativeness scores. During the treatment, the scores on these three dimensions significantly changed toward normal values in treatment-responders, but were stable in treatment-nonresponders. The changes in these dimensions were significantly explained by the change in the depression severity during treatment. Scores on novelty seeking, reward dependence, persistence, and self-transcendence were not correlated significantly to the level of depression and did not change significantly during the treatment in either treatment-responders or nonresponders. LIMITATIONS: The changes in the TCI scores during treatment in this study may reflect a non-specific tendency for the scores to change on retest. CONCLUSIONS: The results suggest that a depressive state can significantly affect assessments of harm avoidance, self-directedness, and cooperativeness in major depression. The administration of the TCI during a depressive episode may elevate the HA score, and may lower the SD and C scores. These findings highlight the importance of considering the state of depression before drawing conclusions about the TCI personality traits, when a patient with major depression is still experiencing a depressive episode.

Adult↗
PubMed2002

Syndromes and phenomenological subtypes underlying acute mania: a factor analytic study of 576 manic patients.

OBJECTIVE: There are no factor analytic studies specifically including symptoms representative of depressive inhibition among manic patients, although Kraepelin described several mixed affective states with depressive inhibition. There is controversy as to whether atypical manic features such as aggression, psychosis, and depression are likely to coexist among manic patients. The authors' goal was to examine this controversy. METHOD: They used a standardized instrument to assess the presence or absence of 37 psychiatric symptoms in 576 consecutive inpatients who were diagnosed as having DSM-IV manic episode, nonmixed or mixed. RESULTS: A principal-component analysis followed by varimax rotation extracted seven independent interpretable factors (depressive mood, irritable aggression, insomnia, depressive inhibition, pure manic symptoms, emotional lability/agitation, and psychosis) that were relatively stable across several patient groups. A subsequent cluster analysis identified four phenomenological subtypes underlying acute mania: pure, aggressive, psychotic, and depressive (mixed) mania. Several variables, including gender, suicidality, and outcome of treatments, significantly differentiated the subtypes. CONCLUSIONS: In patients with mania, depressive inhibition may be a salient syndrome independent of depressive mood, lending some support to Kraepelin's classification of mixed manic states on the basis of the permutations of three elements-thought disorder, mood, and psychomotor activity. Depressive inhibition, together with depressive mood and emotional lability/agitation, appears to be an important phenomenological element of mixed states. Atypical manic features such as aggression, psychosis, and depression are not likely to coexist, but they are likely separately to characterize several different subtypes potentially underlying acute mania.

Acute Disease↗
PubMed2002

Effects of power frequency alternating magnetic fields on reproduction and pre-natal development of mice.

Three groups of ICR male and female mice were exposed to 50-Hz, sinusoidal, alternating, horizontal magnetic fields of 0.0 mT (sham), 0.5 mT and 5.0 mT (rms) for 9 and 2 weeks prior to mating for males and females, respectively, through fertilization and until cesarean sectioning. Fetuses were collected by cesarean section on the 18th day of gestation. Approximately half were randomly selected for skeletal examination and the remainder used for visceral examination. No significant differences were found between the field- and the sham-exposed groups in pre-, post- and total implantation losses; number of live fetuses; sex ratio; live fetal weight; number of externally abnormal fetuses; and numbers of fetuses with skeletal and visceral anomalies. These results suggest that exposure to power-frequency magnetic fields has no major effects on reproduction and development in mice, and do not support the association of EMF exposure with adverse reproductive effects suggested by epidemiology.

Abnormalities, Radiation-Induced↗
PubMedDate not supplied

The Japanese version of the Depressive Experiences Questionnaire: its reliability and validity for lifetime depression in a working population.

We have developed a Japanese version of the Depressive Experiences Questionnaire (DEQ), devised by Blatt et al., for assessing depression-prone personality and examined the questionnaire's reliability (test-retest reliability and internal consistency) and validity. To examine the questionnaire's validity, we evaluated its factorial validity and discriminant power for depression (i.e., construct validity). To test the construct validity of the DEQ with and without depression proneness, the scores on the DEQ subscales were compared between subjects with and without a lifetime history of major depressive disorder (MDD). The Inventory to Diagnose Depression, Lifetime version (IDDL), was used to identify lifetime depression. The reliability tests showed that the Japanese version has reliability almost similar to that of the original version. While the self-criticism has good reliability, the dependency appears to have only modest reliability. In the comparisons between subjects with and without lifetime histories of major depression, the former had significantly higher scores on the self-criticism dimension of the DEQ than did the latter, suggesting that the Japanese version of the DEQ, especially the self-criticism, may have the ability to distinguish individuals with lifetime depression from normal controls. We conclude that the DEQ is an acceptable instrument for assessing the depression-prone personality.

Adult↗
PubMedDate not supplied

Cincinnati criteria for mixed mania and suicidality in patients with acute mania.

The association between suicidality and diagnoses of mixed mania, as defined using both DSM-IV and Cincinnati criteria, was studied in 576 consecutive manic inpatients. Of the whole sample, 51 (8.9%) had suicidal ideation and 13 (2.3%) attempted suicide during the index episode. Suicidality was significantly more frequent in patients with a diagnosis of mixed mania, whether the diagnosis was made by DSM-IV or Cincinnati criteria. A multiple logistic regression analysis revealed that an additive combination of a diagnosis of mixed mania, the depression severity, and the Global Assessment of Functioning (GAF) score was significant in predicting suicidal ideation, when using the DSM-IV criteria. A diagnosis of mixed mania alone was significant in a similar analysis, when using the Cincinnati criteria. The adjusted odds ratio for a diagnosis of mixed mania to having suicidality was much higher when using the latter criteria (4.0 v 14.0). A subsequent logistic regression analysis indicated that the Cincinnati mixed mania alone, rather than an additive combination of the DSM-IV mixed mania and the depression severity, achieved the most appropriate prediction of suicidal ideation in the sample. These findings did not differ, even when suicidality was defined as having a suicide attempt during the index episode. Our finding that suicidality was more strongly associated with Cincinnati mixed mania than with DSM-IV mixed mania is probably due to that suicidal patients who do not meet DSM-IV criteria for mixed mania are classified into mixed mania, or/and that the depressive syndrome, related to suicidality, is more appropriately assessed among manic patients, when using the Cincinnati criteria. There was no evidence that marital status, employment, a lifetime history of alcohol or substance abuse, or a history of suicide attempts before the index episode was significantly associated with suicidality in the sample. Manic patients with suicidality may have a greater severity of residual depressive symptoms at discharge.

Acute Disease↗
PubMedDate not supplied

Coping measurement and the state effect of depression and anxiety in psychiatric outpatients.

The relationship between coping styles and mental health has received considerable attention, but the state effects on coping measures in a clinical sample are not well known. This study investigated changes in scores on the Coping Inventory for Stressful Situations between two treatment phases (acute and remitted phase) in 49 outpatients with major depression or anxiety disorders. Task-oriented coping changed significantly between the treatment phases in both depressive and anxious patients, as analyzed by two-way multivariate analysis of variance. Results from repeated measures of multivariate analysis of covariance indicated that task-oriented coping was influenced by depression and emotion-oriented coping was influenced by anxiety. Avoidance-oriented coping did not change significantly over time in either depressive or anxiety disorders controlled for depressive and anxiety symptoms. The results of this study suggest that depressive or anxiety symptoms and treatment phase affect coping measurement.

Adaptation, Psychological↗