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Biomedical subjects

J Wozniak

Publications and source records attributed to J Wozniak.

At least 19 recordsLinked to original sources
PubMed2006

Efficacy of 12 weeks supplementation of a botanical extract-based weight loss formula on body weight, body composition and blood chemistry in healthy, overweight subjects--a randomised double-blind placebo-controlled clinical trial.

OBJECTIVE: The aim of this study was to evaluate the efficacy and safety of composite extracts in reducing weight, as the main outcome measure. Secondary measures of the study were body composition change. DESIGN: Randomised, double blind, placebo-controlled clinical trial. SETTING: Tertiary university clinic. SUBJECTS: hundred and five subjects, 5 of them withdrawn consent, 2 drop-outs not related to study preparation. INTERVENTION: two tablet per meal concept supposed to generate a "psychological" therapy-like approach during 12 weeks supported by measured physical activity. The tablets 1 (one hour before meals, comprises extracts of Asparagus, Green tea, Black tea, Guarana, Mate and Kidney beans) and 2 (taken half an hour after meals, comprises extracts of Kidney bean pods, Garcinia cambogia, and Chromium yeast) are taken twice daily with two main meals. RESULTS: A significant change of the Body Composition Improvement Index (BCI) was observed in the active extract group compared to placebo (p = 0.012). Weight, BMI, waist-to-hip ratio was not statistically different between groups. Body fat loss was greater in active group (p = 0.011) compared to placebo. A weight loss parameter corrected for exercise was introduced and found to be higher in active group (p = 0.046) than in placebo, meaning that the formula was more efficacious, due to a concurrently performed exercise program--a recommended strategy for life style modification. CONCLUSIONS: A significant change of the Body Composition Improvement Index and the decrease in body fat was statistically significant in active extract subjects compared to placebo. A change in some outcome measures like: weight, BMI failed to produce significant difference between groups.

Adult↗
PubMed2005

Inhibition of nasal polyp mast cell and eosinophil activation by desloratadine.

Nasal polyp tissue which contains mast cells and eosinophils is similar to the inflamed airway mucosa in cellular composition and mediator content. This investigation assessed the effect of desloratadine (DL), on activation of cells in nasal polyp tissue. Polyps were obtained from 22 patients with chronic rhinosinusitis [nine aspirin acetylosalitic acid (ASA)-sensitive and 13 ASA-tolerant]. Polyp tissue was dispersed by digestion, and preincubated with DL and incubated with anti-immunoglobulin E (IgE) or calcium ionophore. LTC4, eosinophil cationic protein (ECP) and tryptase concentrations in supernatants were measured by immunoassays. Desloratadine (1, 10 and 50 microM) inhibited calcium ionophore-induced LTC4 release by a mean of 29%, 50% and 63% respectively, and anti-IgE-induced LTC4 release by a mean of 27%, 35% and 39% respectively. Calcium ionophore-induced tryptase release was inhibited 60% and 69% by 10 and 50 microM of DL, respectively, and anti-IgE-induced tryptase release was inhibited 33%, 47% and 66% for 1, 10 and 50 microM of DL. Desloratadine 10 microM and 50 microM inhibited ECP release by and 45% and 48% respectively. Polyp tissue from ASA-sensitive patients when compared with ASA-tolerant patients released at baseline significantly more ECP (medians 120.0 microg/ml, range: 69.0-182.0 vs 63.4 microg/ml, range: 3.7-172.0; P <0.05), but similar amounts of tryptase and LTC4. This study demonstrated that DL inhibits activation of both eosinophils and mast cells derived from a site of airway mucosal inflammation.

Adult↗
PubMed2004

Working women are better responders to beta-blocker monotherapy of mild hypertension than men.

The aim of this single-blind study was to compare the efficacy of betaxolol treatment (20 mg/day) on 24-h blood pressure profiles in working men and women with mild hypertension (grade 1 acc. ESH/ESC/JNC 2003), A group of 11 men and 11 women with a mean age 47+/-5 years underwent 24-h blood pressure monitoring after 8 days of placebo and after 20 days of treatment. A significant reduction (p < 0.05) in blood pressure was found for 11 h in men and 15 h in women (systolic) and 9 h in men and 13 h in women (diastolic). There was a tendency for a greater mean reduction in women (9.6/8.0 mmHg in men versus 12.9/7.4 mmHg in women). Diastolic blood pressure variability was significantly reduced in women (9.9 versus 13.1, respectively, p < 0.002) with a tendency for systolic blood pressure variability reduction (13.0 versus 15.1). The smoothness index for systolic blood pressure was higher in women (1.0/0.74 versus 0.64/0.61). A better response for betaxolol treatment 20 mg/day was observed in women in terms of target organ damage: a longer period of significant blood pressure reduction, lower variability and a tendency toward a greater reduction.

Adrenergic beta-Antagonists↗
PubMed2001

Parsing pediatric bipolar disorder from its associated comorbidity with the disruptive behavior disorders.

The unique pattern of comorbidity found in pediatric mania greatly complicates accurate diagnosis, the course of the disorder, and its treatment. The pattern of comorbidity is unique by adult standards, especially its overlap with attention-deficit/hyperactivity disorder (ADHD), aggression, and conduct disorder. Clinically, symptoms of mania have been discounted as severe ADHD or ignored in the context of aggressive conduct disorder. This atypicality may lead to neglect of the mood component. The addition of high rates of additional disorders contributes to the severe morbidity, dysfunction, and incapacitation frequently observed in these children. A comprehensive approach to diagnostic evaluation is the keystone to establishing an effective treatment program because response to treatment differs with individual disorders. Recognition of the multiplicity of disorders guides therapeutic options in these often refractory conditions. What was previously considered refractory ADHD, oppositionality, aggression, and conduct disorder may respond after mood stabilization. We review these issues in this article.

Attention Deficit Disorder with Hyperactivity↗
PubMed2001

Heterogeneity of childhood conduct disorder: further evidence of a subtype of conduct disorder linked to bipolar disorder.

BACKGROUND: Although a small literature suggests that conduct disorder (CD) co-occurs with bipolar disorder (BPD), little is known about this overlap. Thus, we investigated the familial association of antisocial disorders (CD and/or antisocial personality disorder (ASPD)) and BPD among the first degree relatives of children with CD with and without comorbid BPD. METHODS: We compared relatives of four proband groups defined by the presence or absence of CD and BPD in the proband: (1) CD+BPD (N=26 probands, 92 relatives; (2) BPD without CD (BPD) (N=19 probands, 53 relatives); (3) CD without BPD (CD) (N=16 probands, 58 relatives); and (4) controls without BPD or CD (N=102 probands, 338 relatives). All subjects were evaluated with structured diagnostic interviews. Diagnoses of relatives were made blind to the diagnoses of probands. RESULTS: The results show high rates of antisocial disorders and BPD in relatives of children with CD+BPD. Moreover, antisocial disorders and BPD cosegregated among the relatives of children with CD+BPD. While relatives of both CD proband groups with and without BPD had high rates of CD/ASPD, the combined condition CD/ASPD+BPD was found exclusively among relatives of probands with CD+BPD. LIMITATIONS: Since we pooled two datasets, subjects were not all evaluated at the same time. Also, the lack of direct psychiatric interviews with children younger than 12 may have decreased the sensitivity of some diagnoses. CONCLUSIONS: These family-genetic findings suggest that CD and BPD represent separate disorders. Furthermore, they suggest that the comorbid condition of CD+BPD may be a distinct nosological entity. This suggests that clinicians treating CD or BPD children should consider the treatment implications of this comorbid condition.

Adolescent↗
PubMed2001

Diagnostic and therapeutic dilemmas in the management of pediatric-onset bipolar disorder.

Although the diagnosis of pediatric-onset bipolar disorder is controversial, an increasing literature of systematic research has challenged the traditional view that this disorder is a rare condition. This article summarizes research regarding the atypical presentation of pediatric bipolar disorder and its overlap with attention-deficit/hyperactivity disorder and other comorbid conditions, as well as family-genetic and treatment data. When structured interview data were examined, cases of pediatric mania constituted 16% of referrals to our outpatient clinic. Presentation is atypical by adult standards and includes irritability, chronicity, and mixed state. Family-genetic and treatment data help to establish diagnostic validity. Pediatric bipolar disorder is not a rare condition. Treatment requires a combined pharmacotherapy approach to address issues of comorbidity. Atypical antipsychotic medications have provided promising treatment results, but additional controlled clinical trials are needed.

Adolescent↗
PubMed2000

Parsing the association between bipolar, conduct, and substance use disorders: a familial risk analysis.

BACKGROUND: Bipolar disorder has emerged as a risk factor for substance use disorders (alcohol or drug abuse or dependence) in youth; however, the association between bipolar disorder and substance use disorders is complicated by comorbidity with conduct disorder. We used familial risk analysis to disentangle the association between the three disorders. METHODS: We compared relatives of four proband groups: 1) conduct disorder + bipolar disorder, 2) bipolar disorder without conduct disorder, 3) conduct disorder without bipolar disorder, and 4) control subjects without bipolar disorder or conduct disorder. All subjects were evaluated with structured diagnostic interviews. For the analysis of substance use disorders, Cox proportional hazard survival models were utilized to compare age-at-onset distributions. RESULTS: Bipolar disorder in probands was a risk factor for both drug and alcohol addiction in relatives, independent of conduct disorder in probands, which was a risk factor for alcohol dependence in relatives independent of bipolar disorder in probands, but not for drug dependence. The effects of bipolar disorder and conduct disorder in probands combined additively to predict the risk for substance use disorders in relatives. CONCLUSIONS: The combination of conduct disorder + bipolar disorder in youth predicts especially high rates of substance use disorders in relatives. These findings support previous results documenting that when bipolar disorder and conduct disorder occur comorbidly, both are validly diagnosed disorders.

Adolescent↗
PubMed2000

Pediatric mania: a developmental subtype of bipolar disorder?

Despite ongoing controversy, the view that pediatric mania is rare or nonexistent has been increasingly challenged not only by case reports, but also by systematic research. This research strongly suggests that pediatric mania may not be rare but that it may be difficult to diagnose. Since children with mania are likely to become adults with bipolar disorder, the recognition and characterization of childhood-onset mania may help identify a meaningful developmental subtype of bipolar disorder worthy of further investigation. The major difficulties that complicate the diagnosis of pediatric mania include: 1) its pattern of comorbidity may be unique by adult standards, especially its overlap with attention-deficit/hyperactivity disorder, aggression, and conduct disorder; 2) its overlap with substance use disorders; 3) its association with trauma and adversity; and 4) its response to treatment is atypical by adult standards.

Adolescent↗
PubMed2000

Resonant formation of d&mgr;t molecules in deuterium: An atomic beam measurement of muon catalyzed dt fusion

Resonant formation of d&mgr;t molecules in collisions of muonic tritium ( &mgr;t) on D2 was investigated using a beam of &mgr;t atoms, demonstrating a new direct approach in muon catalyzed fusion studies. Strong epithermal resonances in d&mgr;t formation were directly revealed for the first time. From the time-of-flight analysis of 2036+/-116 dt fusion events, a formation rate consistent with 0.73+/-(0.16)(meas)+/-(0.09)(model) times the theoretical prediction was obtained. For the largest peak at a resonance energy of 0.423+/-0.037 eV, this corresponds to a rate of (7.1+/-1.8)x10(9) s(-1), more than an order of magnitude larger than those at low energies.

Journal Article↗
PubMed2000

Is bipolar disorder a risk for cigarette smoking in ADHD youth?

Despite emerging literature linking juvenile bipolar disorder (BPD) and substance abuse, little is known about a link between BPD and cigarette smoking. To this end, we evaluated the association between BPD and cigarette smoking in youth. Subjects were 31 bipolar adolescents derived from a cohort of boys with DSM-III-R ADHD (N = 128) and non-ADHD comparisons (N = 109) followed prospectively for 4 years into mid-adolescence. Information on cigarette smoking was obtained in a standardized manner blind to the proband's clinical status. Logistic regression models were used to determine risk for smoking at follow-up. BPD was associated with a higher risk for cigarette smoking in mid-adolescence, which was largely accounted for by conduct disorder. The developmental onset of BPD in adolescence (age 13-18 years) conferred a greater risk for cigarette smoking compared to those youths with the onset of their BPD prepubertally (< or = 12 years; odds ratio = 10.8, p < 0.01), even after controlling for conduct disorder and other confounds. The naturalistic treatment of BPD with combined counseling and pharmacotherapy appeared to reduce the risk for cigarette smoking. BPD, particularly when it onsets in adolescence, is a significant risk factor for the early initiation of cigarette smoking in these ADHD youths. These data coupled with the literature strongly suggest that juveniles with BPD need to be carefully monitored for the early initiation of cigarette smoking and substance abuse.

Adolescent↗
PubMed2000

Differential metabolism of arachidonic acid in nasal polyp epithelial cells cultured from aspirin-sensitive and aspirin-tolerant patients.

The mechanism of aspirin (acetylsalicylic acid [ASA]) sensitivity associated with severe asthma and chronic rhinosinusitis with nasal polyps ("aspirin triad") has been attributed to arachidonic metabolism alternations, although the putative biochemical defects have not been elucidated. The aim of this study was assessment of the hypothesis that local production of eicosanoids in the respiratory epithelium in patients with ASA-sensitive asthma/rhinosinusitis (ASARS) differs from that of ASA-tolerant patients with rhinosinusitis (ATRS). Nasal polyps were obtained from 10 patients with ASARS and 15 with ATRS during routine polypectomies, and epithelial cells (ECs) were cultured on bovine collagen type I matrix (Vitrogen 100), in medium supplemented with growth factors. The generation of eicosanoids in supernatants of confluent ECs (6 to 8 d of culture; purity > 98%) was quantified by immunoassays. Unstimulated ECs from ASARS patients generated significantly less prostaglandin E(2)(PGE(2)) compared with ATRS (0.8 +/- 0.3 versus 2. 4 +/- 0.5 ng/microg double-stranded deoxyribonucleic acid [dsDNA], respectively), although a similar relative increase in response to calcium ionophore and inhibition with ASA was observed in both groups. Basal levels of 15-hydroxyeicosatetraenoic acid (15-HETE) were not different between groups, and calcium ionophore enhanced its production to a similar extent. However, cells incubation with 200 microM ASA for 60 min resulted in a significant increase (mean +359%) in 15-HETE generation only in ASARS patients, whereas no effect of ASA on 15-HETE generation in ATRS patients was observed. PGF(2alpha) generation was similar in both groups, and no significant generation of PGD(2) or leukotriene C(4) (LTC(4)) was observed in epithelial cell cultures from either group. Our results indicate that nasal polyps ECs from ASA-sensitive patients have significant abnormality in basal and ASA-induced generation of eicosanoids which may be causally related to the mechanism of ASA sensitivity.

Adult↗
PubMed1999

Systematic chart review of the pharmacologic treatment of comorbid attention deficit hyperactivity disorder in youth with bipolar disorder.

The objective of this study was to evaluate pharmacological approaches for attention deficit hyperactivity disorder (ADHD) in children with bioplar disorder and comorbid ADHD. The medical charts of 38 patients with diagnoses of both Diagnostic and Statistical Manual of Mental Disorders, 3rd ed., revised ADHD and bipolar disorder were reviewed over multiple visits to assess improvement and prescription patterns. Logistic regression was used to model the probability of improvement at each visit, and robust standard errors were estimated in order to account for correlation among individuals using Huber's correction for clustered data. The proportion of visits at which ADHD symptoms were rated as improved following initial improvement in manic symptoms was 7.5 times greater than before initial improvement of manic symptoms. The recurrence of manic symptoms following their initial stabilization significantly inhibited ADHD response to medication. Although tricyclic antidepressants (TCAs) significantly increased the probability of ADHD improvement following mood stabilization, there was also a significant association between treatment with TCAs and relapse of manic symptoms. Our results support the hypothesis that mood stabilization is a prerequisite for the successful pharmacologic treatment of ADHD in children with both ADHD and manic symptoms. Although TCAs can be helpful in the management of ADHD children with manic symptoms, these drugs should be used with caution since they can also have a destabilizing effect on manic symptoms.

Adolescent↗
PubMed1999

Antecedents and complications of trauma in boys with ADHD: findings from a longitudinal study.

OBJECTIVE: To examine the relationship between trauma and attention-deficit hyperactivity disorder (ADHD), evaluating whether ADHD increases the risk for trauma, the risk for posttraumatic stress disorder (PTSD), or the risk for trauma-associated psychopathology. METHOD: Data from a longitudinal sample of 260 children and adolescents with and without ADHD were examined. All were evaluated comprehensively with assessments in multiple domains of functioning including systematic assessments of trauma and PTSD. Comparisons were made between traumatized and nontraumatized youths with and without ADHD. RESULTS: No meaningful differences were detected in comparisons between ADHD and control children, either in the rate of trauma exposure or in the development of PTSD. Although trauma was associated with the development of major depression, this effect was independent of ADHD status. In contrast, bipolar disorder at baseline assessment was a significant risk factor for subsequent trauma exposure. CONCLUSIONS: ADHD was not found to be a risk factor for either trauma exposure or PTSD, but childhood mania was. If confirmed, this finding stresses the potential severe clinical sequelae of childhood mania in children.

Adolescent↗
PubMed1999

Further evidence of a bidirectional overlap between juvenile mania and conduct disorder in children.

OBJECTIVE: To investigate systematically the overlap between mania and conduct disorder (CD) in a sample of consecutively referred youths. It was hypothesized that neither CD nor manic symptoms were secondary to the other disorder and that children with the 2 disorders would have correlates of both. METHOD: Subjects were consecutively referred children and adolescents meeting DSM-III-R diagnostic criteria on structured diagnostic interview for CD (n = 116), mania (n = 110), and CD + mania (n = 76). RESULTS: Of 186 children and adolescents with mania and of 192 with CD, 76 satisfied criteria for both CD and mania, representing 40% of youths with CD and 41% of youths with mania, respectively. Examination of the clinical features, patterns of psychiatric comorbidity, and functioning in multiple domains showed that children with CD and mania had similar features of each disorder irrespective of the comorbidity with the other disorder. CONCLUSIONS: The data suggest that when mania and CD co-occur in children, both are correctly diagnosed. In these comorbid cases, CD symptoms should not be viewed as secondary to mania and manic symptoms should not be viewed as secondary to CD.

Adolescent↗
PubMed1999

Risk for substance use disorders in youths with child- and adolescent-onset bipolar disorder.

OBJECTIVE: Previous work in adults has suggested that early-onset bipolar disorder (BPD) is associated with an elevated risk for substance use disorders (SUD). To this end, the authors assessed the risk for SUD in child- versus adolescent-onset BPD with attention to comorbid psychopathology. METHOD: All youths (aged 13-18 years) with available structured psychiatric interviews were studied systematically. From clinic subjects (N = 333), 86 subjects with DSM-III-R BPD were identified. To evaluate the risk for SUD and BPD while attending to developmental issues, the authors stratified the BPD sample into those with child-onset BPD (< or = 12 years of age, n = 50) and those with adolescent-onset BPD (13-18 years of age, n = 36). RESULTS: In mid-adolescence, youths with adolescent-onset BPD were at significantly increased risk for SUD relative to those with child-onset BPD (39% versus 8%; p = .001). Compared with those with child-onset BPD, those with adolescent-onset BPD had 8.8 times the risk for SUD (95% confidence interval = 2.2-34.7; chi 7(2) = 9.7, p = .002). The presence of conduct disorder or other comorbid psychopathology within BPD did not account for the risk for SUD. CONCLUSIONS: Adolescent-onset BPD is associated with a much higher risk for SUD than child-onset BPD, which was not accounted for by conduct disorder or other comorbid psychopathology. Youths with adolescent-onset BPD should be monitored and educated about SUD risk. The identification and treatment of manic symptomatology may offer therapeutic opportunities to decrease the risk for SUD in these high-risk youths.

Adolescent↗
PubMed1999

Risperidone treatment for juvenile bipolar disorder: a retrospective chart review.

OBJECTIVE: To investigate the effectiveness and tolerability of the atypical neuroleptic risperidone in the treatment of juvenile mania. METHOD: This is a retrospective chart review of outpatients with the diagnosis of bipolar disorder (DSM-IV) treated with risperidone at a university center. Response to treatment was evaluated using the Clinical Global Impression Scale (CGI) with separate assessments of mania, psychosis, aggression, and attention-deficit/hyperactivity disorder (ADHD). RESULTS: Twenty-eight youths (mean +/- SD age, 10.4 +/- 3.8 years) with bipolar disorder (25 mixed and 3 hypomanic) who had been treated with risperidone were identified. These children received a mean dose of 1.7 +/- 1.3 mg over an average period of 6.1 +/- 8.5 months. Using a CGI Improvement score of < or = 2 (very much/much improved) to define robust improvement, 82% showed improvement in both their manic and aggressive symptoms, 69% in psychotic symptoms, but only 8% in ADHD symptoms. CONCLUSIONS: Although limited by its retrospective nature, this study suggests that risperidone may be effective in the treatment of manic young people and indicates the need for controlled clinical trials of risperidone and other atypical neuroleptics in juvenile mania.

Adolescent↗
PubMed1998

Clinical features of children with both ADHD and mania: does ascertainment source make a difference?

OBJECTIVE: We evaluated the structural diagnostic results of children ascertained through an ADHD diagnosis with comorbid mania to determine if they have the same phenotype as children ascertained through a mania diagnosis with comorbid ADHD. METHOD: We compared a sample of children participating in a family genetic study of ADHD to a sample of children ascertained through a study of childhood mania. RESULTS: Similar correlates of ADHD and mania were observed in children satisfying criteria for both disorders irrespective of ascertainment source. CONCLUSIONS: Findings suggest that children with mania and ADHD have two disorders, their features not varying with the primary diagnostic focus. LIMITATIONS: The results may have been limited by small sample size. CLINICAL RELEVANCE: Because the coexistence of ADHD and mania seriously complicates the course and treatment of children, understanding the compatibility of these disorders has important clinical implications in the management of this population.

Adolescent↗