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Genetic Variations in Elements of the Oxytocinergic Pathway are Associated with Attention/Hyperactivity Problems and Anxiety Problems in Childhood. Child Psychiatry Hum Dev 2024; 55:552-563. [PMID: 36087156 DOI: 10.1007/s10578-022-01419-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Revised: 08/03/2022] [Accepted: 08/17/2022] [Indexed: 11/28/2022]
Abstract
Genetic alterations related to oxytocin system seem to influence the neurobiology of attention-deficit hyperactivity disorder and anxiety problems leading to greater functional, social and emotional impairment. Here, we analyzed the association of OXTR rs2254298 and CD38 rs6449182 variants with attention/hyperactivity problems and anxiety problems in children. The study enrolled 292 children and adjusted regression model revealed OXTR rs2254298 AA genotype as a risk factor for attention deficit/hyperactivity problems (PR: 2.37; PadjFDR = 0.006), attention problems (PR: 2.71; PadjFDR = 0.003) and anxiety problems (PR: 1.92; PadjFDR = 0.018). CD38 rs6449182 G allele showed as a risk factor for attention deficit/hyperactivity problems (PR: 1.56; PadjFDR = 0.028). Moreover, in silico approach for regulatory roles found markers that influence chromatin accessibility and transcription capacity. Together, these data provide genetic information of oxytocin in developmental and behavioral disorders opening a range of opportunities for future studies that clarify their neurobiology in childhood.
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Interaction between COMT Val 158 Met polymorphism and childhood trauma predicts risk for depression in men. Int J Dev Neurosci 2022; 82:385-396. [PMID: 35441426 DOI: 10.1002/jdn.10186] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Revised: 02/28/2022] [Accepted: 04/03/2022] [Indexed: 11/08/2022] Open
Abstract
Depression is a disabling illness with complex etiology. While the Catechol-O-Methyltransferase (COMT) gene, in particular the functional Val158 Met polymorphism, has been related to depression, the mechanisms underlying this gene-disease association are not completely understood. Therefore, we explore the association of COMT Val158 Met polymorphism with depression as well as its interaction with childhood trauma in 1,136 young adults from a population-based study carried out in the city of Pelotas-Brazil. The diagnosis was performed through the Mini International Neuropsychiatric Interview 5.0 (MINI 5.0), and trauma was assessed with the childhood trauma questionnaire (CTQ). Total DNA was extracted and genotyped by real-time PCR and the QTLbase dataset was queried to perform large-scale quantitative trait locus (QTL) analysis. Our research showed no direct association between the Val158 Met polymorphism and the diagnosis of depression (women: χ2=0.10, d=1, p=0.751 and men: χ2=0.003, df=1 p=0.956). However, the Met-allele of the Val158 Met polymorphism modified the effect of childhood trauma in men [OR=2.58 (95% CI:1.05-6.29); p=0.038] conferring risk for depression only on those who suffer from trauma. The conditional effect from moderation analysis showed that trauma impacts the risk of depression only in men carrying the Met-allele (Effect: 0.9490, Standard Error (SE): 0.2570; p=0.0002). QTLbase and dataset for Val158 Met polymorphism were consistent for markers that influence chromatin accessibility transcription capacity including histone methylation and acetylation. The changes caused in gene regulation by childhood trauma exposure and polymorphism may serve as evidence of the mechanism whereby the interaction increases susceptibility to this disorder in men.
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Behavioral characterization of ayahuasca treatment on Wistar rats in the open field test. BRAZ J PHARM SCI 2022. [DOI: 10.1590/s2175-97902022e21110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
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Magnetic nanoparticles hyperthermia in a non-adiabatic and radiating process. Sci Rep 2021; 11:11867. [PMID: 34088933 PMCID: PMC8178398 DOI: 10.1038/s41598-021-91334-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Accepted: 05/25/2021] [Indexed: 11/17/2022] Open
Abstract
We investigate the magnetic nanoparticles hyperthermia in a non-adiabatic and radiating process through the calorimetric method. Specifically, we propose a theoretical approach to magnetic hyperthermia from a thermodynamic point of view. To test the robustness of the approach, we perform hyperthermia experiments and analyse the thermal behavior of magnetite and magnesium ferrite magnetic nanoparticles dispersed in water submitted to an alternating magnetic field. From our findings, besides estimating the specific loss power value from a non-adiabatic and radiating process, thus enhancing the accuracy in the determination of this quantity, we provide physical meaning to a parameter found in literature that still remained not fully understood, the effective thermal conductance, and bring to light how it can be obtained from experiment. In addition, we show our approach brings a correction to the estimated experimental results for specific loss power and effective thermal conductance, thus demonstrating the importance of the heat loss rate due to the thermal radiation in magnetic hyperthermia.
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BDNF Val66Met polymorphism and resilience in major depressive disorder: the impact of cognitive psychotherapy. BRAZILIAN JOURNAL OF PSYCHIATRY 2020; 43:22-28. [PMID: 32844885 PMCID: PMC7861181 DOI: 10.1590/1516-4446-2019-0726] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Accepted: 02/21/2020] [Indexed: 11/22/2022]
Abstract
Objective: Clinical and biological correlates of resilience in major depressive disorder are scarce. We aimed to investigate the effect of the Val66Met polymorphism in the BDNF gene on resilience scores in major depressive disorder patients and evaluate the polymorphism’s moderation effect on resilience scores in response to cognitive therapy. Method: A total of 106 major depressive disorder patients were enrolled in this clinical randomized study. The Resilience Scale and the Hamilton Rating Scale for Depression were applied at baseline, post-treatment, and at six months of follow-up. Blood samples were obtained at baseline for molecular analysis. Results: The baseline resilience scores were higher in patients with the Met allele (114.6±17.6) than in those with the Val/Val genotype (104.04±21.05; p = 0.037). Cognitive therapy treatment increased resilience scores (p ≤ 0.001) and decreased depressive symptoms (p ≤ 0.001). In the mixed-effect model, the Val/Val genotype represented a decrease in resilience scores (t218 = -1.98; p = 0.048), and the Val66Met polymorphism interacted with sex to predict an increase in total resilience scores during cognitive treatment (t218 = 2.69; p = 0.008). Conclusion: Our results indicate that cognitive therapy intervention could improve resilience in follow-up, considering that gender and genetic susceptibility are predicted by the Val66Met polymorphism.
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Inosine prevents hyperlocomotion in a ketamine-induced model of mania in rats. Brain Res 2020; 1733:146721. [PMID: 32045593 DOI: 10.1016/j.brainres.2020.146721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Revised: 01/08/2020] [Accepted: 02/07/2020] [Indexed: 10/25/2022]
Abstract
Bipolar Disorder is a disorder characterized by alternating episodes of depression, mania or hypomania, or even mixed episodes. The treatment consists on the use of mood stabilizers, which imply serious adverse effects. Therefore, it is necessary to identify new therapeutic targets to prevent or avoid new episodes. Evidence shows that individuals in manic episodes present a purinergic system dysfunction. In this scenario, inosine is a purine nucleoside known to act as an agonist of A1 and A2A adenosine receptors. Thus, we aimed to elucidate the preventive effect of inosine on locomotor activity, changes in purine levels, and adenosine receptors density in a ketamine-induced model of mania in rats. Inosine pretreatment (25 mg/kg, oral route) prevented the hyperlocomotion induced by ketamine (25 mg/kg, intraperitoneal route) in the open-field test; however, there was no difference in hippocampal density of A1 and A2A receptors, where ketamine, as well as inosine, were not able to promote changes in immunocontent of the adenosine receptors. Likewise, no effects of inosine pretreatments or ketamine treatment were observed for purine and metabolic residue levels evaluated. In this sense, we suggest further investigation of signaling pathways involving purinergic receptors, using pharmacological strategies to better elucidate the action mechanisms of inosine on bipolar disorder. Despite the limitations, inosine administration could be a promising candidate for bipolar disorder treatment, especially by attenuating maniac phase symptoms, once it was able to prevent the hyperlocomotion induced by ketamine in rats.
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NR4A2 haploinsufficiency is associated with intellectual disability and autism spectrum disorder. Clin Genet 2019; 94:264-268. [PMID: 29770430 DOI: 10.1111/cge.13383] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Revised: 05/10/2018] [Accepted: 05/11/2018] [Indexed: 01/15/2023]
Abstract
NR4A2, a member of the nuclear receptor superfamily, is involved in modulation of target gene transcription, regulating several developmental processes such as regulation of cellular homeostasis, neuronal development, inflammation and carcinogenesis. 2q24.1 deletions are extremely rare, and only 1 patient with a de novo deletion encompassing only NR4A2 gene was reported so far. We report 3 additional patients with a de novo deletion encompassing NR4A2: 2 patients have deletions encompassing only NR4A2 gene and 1 patient has a deletion including NR4A2 and the first exon of GPD2. Our patients presented a neurodevelopmental disorder including language impairment, developmental delay, intellectual disability and/or autism spectrum disorder. We suggest that NR4A2 haploinsufficiency is implicated in neurodevelopmental disorder with high penetrance.
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Toward a motor signature in autism: Studies from human-machine interaction. Encephale 2019; 45:182-187. [PMID: 30503684 DOI: 10.1016/j.encep.2018.08.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Revised: 08/05/2018] [Accepted: 08/09/2018] [Indexed: 10/27/2022]
Abstract
BACKGROUND Autism spectrum disorder (ASD) is a heterogeneous group of neurodevelopmental disorders which core symptoms are impairments in socio-communication and repetitive symptoms and stereotypies. Although not cardinal symptoms per se, motor impairments are fundamental aspects of ASD. These impairments are associated with postural and motor control disabilities that we investigated using computational modeling and developmental robotics through human-machine interaction paradigms. METHOD First, in a set of studies involving a human-robot posture imitation, we explored the impact of 3 different groups of partners (including a group of children with ASD) on robot learning by imitation. Second, using an ecological task, i.e. a real-time motor imitation with a tightrope walker (TW) avatar, we investigated interpersonal synchronization, motor coordination and motor control during the task in children with ASD (n=29), TD children (n=39) and children with developmental coordination disorder (n=17, DCD). RESULTS From the human-robot experiments, we evidenced that motor signature at both groups' and individuals' levels had a key influence on imitation learning, posture recognition and identity recognition. From the more dynamic motor imitation paradigm with a TW avatar, we found that interpersonal synchronization, motor coordination and motor control were more impaired in children with ASD compared to both TD children and children with DCD. Taken together these results confirm the motor peculiarities of children with ASD despite imitation tasks were adequately performed. DISCUSSION Studies from human-machine interaction support the idea of a behavioral signature in children with ASD. However, several issues need to be addressed. Is this behavioral signature motoric in essence? Is it possible to ascertain that these peculiarities occur during all motor tasks (e.g. posture, voluntary movement)? Could this motor signature be considered as specific to autism, notably in comparison to DCD that also display poor motor coordination skills? We suggest that more work comparing the two conditions should be implemented, including analysis of kinematics and movement smoothness with sufficient measurement quality to allow spectral analysis.
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Differential molecular signature in patients from African origin with triple-negative breast cancer. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy272.290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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10
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Genomic and epidemiological monitoring of yellow fever virus transmission potential. Science 2018; 361:894-899. [PMID: 30139911 PMCID: PMC6874500 DOI: 10.1126/science.aat7115] [Citation(s) in RCA: 204] [Impact Index Per Article: 34.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2018] [Accepted: 07/20/2018] [Indexed: 12/21/2022]
Abstract
The yellow fever virus (YFV) epidemic in Brazil is the largest in decades. The recent discovery of YFV in Brazilian Aedes species mosquitos highlights a need to monitor the risk of reestablishment of urban YFV transmission in the Americas. We use a suite of epidemiological, spatial, and genomic approaches to characterize YFV transmission. We show that the age and sex distribution of human cases is characteristic of sylvatic transmission. Analysis of YFV cases combined with genomes generated locally reveals an early phase of sylvatic YFV transmission and spatial expansion toward previously YFV-free areas, followed by a rise in viral spillover to humans in late 2016. Our results establish a framework for monitoring YFV transmission in real time that will contribute to a global strategy to eliminate future YFV epidemics.
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Childhood-onset form of myotonic dystrophy type 1 and autism spectrum disorder: Is there comorbidity? Neuromuscul Disord 2018; 28:216-221. [DOI: 10.1016/j.nmd.2017.12.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Accepted: 12/08/2017] [Indexed: 11/24/2022]
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Using medical exome sequencing to identify the causes of neurodevelopmental disorders: Experience of 2 clinical units and 216 patients. Clin Genet 2017; 93:567-576. [DOI: 10.1111/cge.13102] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Revised: 07/07/2017] [Accepted: 07/10/2017] [Indexed: 12/19/2022]
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Vaginal lichen sclerosus: report of two cases. Facts Views Vis Obgyn 2017; 9:171-173. [PMID: 29479404 PMCID: PMC5819327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022] Open
Abstract
BACKGROUND Lichen sclerosus most commonly affects the genital area. Contrarily to lichen planus, the involvement of the oral or vaginal mucosa is rare. Only four cases of vaginal lichen sclerosus have been described in the literature. CASE REPORT The authors report two cases of postmenopausal women with a history of vulvar pruritus and burning. Both presented with lesions of the vaginal mucosa compatible with lichen sclerosus, and genital prolapse. Vaginal biopsies confirmed the diagnosis. Initial treatment with topical clobetasol was effective in one of the patients, but in the other patient line therapy with pimecrolimus, triamcinolone, and retinoids was needed. CONCLUSION Vaginal lichen sclerosus may be underdiagnosed and genital prolapse may favour the development of vaginal lesions.
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Population Profile Submitted to Cardiac Transplantation in a Brazilian Hospital: Comparison Involving the Registry of ISHLT. J Heart Lung Transplant 2016. [DOI: 10.1016/j.healun.2016.01.832] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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New record of the glassfrogs Hyalinobatrachium cappellei (Van Lidth de Jeude, 1904) and Cochranella adenocheira Harvey and Noonan, 2005, (Anura: Centrolenidae) in Volta Grande do Xingu, north Pará state, Brazil. BRAZ J BIOL 2015; 75:219-21. [PMID: 26691095 DOI: 10.1590/1519-6984.02014bm] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2014] [Accepted: 12/11/2014] [Indexed: 11/22/2022] Open
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Mixed-mode I+II fracture characterization of human cortical bone using the Single Leg Bending test. J Mech Behav Biomed Mater 2015; 54:72-81. [PMID: 26433088 DOI: 10.1016/j.jmbbm.2015.09.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Revised: 09/02/2015] [Accepted: 09/04/2015] [Indexed: 10/23/2022]
Abstract
Mixed-mode I+II fracture characterization of human cortical bone was analyzed in this work. A miniaturized version of the Single Leg Bending test (SLB) was used owing to its simplicity. A power law criterion was verified to accurately describe the material fracture envelop under mixed-mode I+II loading. The crack tip opening displacements measured by digital image correlation were used in a direct method to determine the cohesive law mimicking fracture behavior of cortical bone. Cohesive zone modeling was used for the sake of validation. Several fracture quantities were compared with the experimental results and the good agreement observed proves the appropriateness of the proposed procedure for fracture characterization of human bone under mixed-mode I+II loading.
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Developmental dyspraxia: A psychiatrist's point of view. Ann Phys Rehabil Med 2015. [DOI: 10.1016/j.rehab.2015.07.068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Comparative Failure Analysis of PLA, PLA/GNP and PLA/CNT-COOH Biodegradable Nanocomposites thin Films. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.proeng.2015.08.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Seroprevalence of Salmonella and Mycoplasma infection in backyard chickens in the state of Entre Ríos in Argentina. Poult Sci 2011; 90:746-51. [DOI: 10.3382/ps.2010-01036] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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The double cantilever beam test applied to mode I fracture characterization of cortical bone tissue. J Mech Behav Biomed Mater 2010; 3:446-53. [DOI: 10.1016/j.jmbbm.2010.04.001] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2010] [Revised: 03/26/2010] [Accepted: 04/01/2010] [Indexed: 10/19/2022]
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279 Name of program: evaluation of the strategy of treatment for myocardial infarction by the RESCUe network. BMJ Qual Saf 2010. [DOI: 10.1136/qshc.2010.041624.60] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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22
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Neural correlates of illusory motion perception: The influence of apparent motion on plaid motion aftereffects. J Vis 2010. [DOI: 10.1167/5.8.666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Phénotype psychiatrique des maladies neuromusculaires de l’enfant: revue de la littérature. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.neurenf.2007.03.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Abstract
A 13 year old female patient presented to ENT OPD with chronic recurrent tonsillitis and underwent tonsillectomy. The histopathological examination revealed heterotopic cartilage in both the tonsils. The postoperative period was uneventful. The histopathologic finding of choristom of the tonsil is rare.
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[Ischemic optic neuropathy following a dural arteriovenous fistula. Vascular steal phenomenon]. Rev Neurol 2003; 37:1032-4. [PMID: 14669143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/27/2023]
Abstract
CASE REPORT We report the case of a 46-year-old patient, with a dural arteriovenous fistula in the left cavernous sinus fed by dural branches of both carotid siphons, by recurrent branches of the left ophthalmic artery (LOA) and by dural branches of the left external carotid artery. Twenty-four hours after arterial embolisation with polyvinyl alcohol particles, the patient suffered visual loss in the left eye. All feeders were embolized except the recurrent branches of the LOA, which became hypertrophied. Fluorescein angiography of the retina was normal. Transocular Doppler ultrasound showed a turbulent, inverted, low resistance flow in the LOA distal part, and a high resistance anterograde flow in the left central artery of the retina, which accounted for an ischemic optic neuropathy. CONCLUSIONS The ischemic optic neuropathy resulted from a vascular steal phenomenon. Hypertrophy of recurrent branches of the LOA, after embolization of the remaining feeders, contributed to a low resistance shunt between the LOA proximal part and the left cavernous sinus. This shunt caused the inversion of flow in the distal part of the artery and the subsequent decrease of retrobulbar blood supply.
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A case of cardiac fibroma obstructing the right ventricular outflow tract. Indian J Thorac Cardiovasc Surg 2002. [DOI: 10.1007/s12055-002-0031-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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[Dural fistulas of the anterior cranial fossa]. ACTA MEDICA PORT 2001; 14:71-5. [PMID: 11321982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
Dural arterio-venous shunts (DAVS) of the anterior cranial fossa are quite rare. There are only a few cases reported in the literature. The authors present 5 cases of dural arterio-venous shunts (DAVS) of the anterior cranial fossa, allowing more data for later reviews of this rare and aggressive localisation of DAVS. The clinical set, imaging findings (with emphasis in diagnostic angiography), treatment and outcome in these 5 patients are described. Haemorrhage was the presenting form in 4 patients; the other case presented was investigated for headache. There were bilateral symmetric feeders in two patients, unilateral feeders in another two and unilateral predominant feeders in one; contribution of the external carotid artery, when present, was always minimal. Venous drainage included one or combinations of these: superior sagittal sinus, sylvian veins and cavernous sinus. Three patients had venous aneurysms in anterior cranial fossa; of these, two presented with haemorrhage, but the third one of them has been asymptomatic for 7 years. Three patients were treated by surgical exclusion of the shunt and became clinical and angiographicaly normal. According to the literature, our cases confirm the highly aggressive behaviour of these DAVS. Surgical treatment is an efficacious method of therapy and should be done as soon as possible. Embolization can be attempted but is technically difficult and eventually too expensive.
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[Endovascular treatment of dissecting aneurysms of the posterior cerebral artery]. ACTA MEDICA PORT 2001; 14:65-70. [PMID: 11321980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
In the literature, there are few reports of posterior cerebral artery aneurysms resulting from isolated dissections. In these cases the treatment is still a matter of discussion and includes anticoagulation, surgical intervention, endovascular techniques and conservative management. We present five cases of Posterior Cerebral Artery (PCA) aneurysms, with angiographic criteria of dissection (double lumen, proximal narrowing), all being situated at the P2 segment, three being close to the P1/P2 junction. In one case, a large aneurysm ruptured during the attempted catheterization with subsequent death of the patient. In three patients occlusion of the parent vessel was performed with Guglielmi detachable coils located proximal to the aneurysm, with no new neurological deficits. In the other case there was spontaneous thrombosis of the aneurysm. Occlusion of the parent vessel by endovascular techniques in dissecting PCA aneurysms has a low probability of neurological deficits and seems to be an appropriate approach for these aneurysms.
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[Vascularization of the skull base--review of the literature and illustrative cases]. ACTA MEDICA PORT 2001; 14:33-42. [PMID: 11321975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
The dural vascularization of the skull base and proximal nervous structures, depends on the external carotid artery, internal carotid artery and vertebral artery branches. The authors describe these branches, emphasizing possible anastomoses between them, and present images from their own experience. Such arterio-arterial anastomosis represent incomplete regressions of embryologic arterial connections and are always present, but functionally inactive. It is usually in the presence of pathologic situations (stroke, tumours, dural fistulas) that they become active and, therefore, special care is necessary if endovascular procedures with embolic material are to be performed.
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[Dysembryoplastic neuroepithelial tumors]. Rev Neurol 2000; 30:436-41. [PMID: 10775970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
INTRODUCTION The dysembryoplastic neuroepithelial tumors tend to occur in young patients, with partial complex partial seizures which is refractory to medical treatment. These are stable lesions, with defined histological features, specially with clinical data corroboration. CLINICAL CASES The clinical, imagiological, operative, and histopathological data of six patients with proved dysembryoplastic neuroepithelial tumors were reviewed. All patients had seizures with age at onset ranged from 7 to 27 years. Five lesions were located in the temporal lobe and one in the parietal lobe. Common features included cortical to subcortical location, low density in CT-scan, very low signal intensity on T1-weighted images and high signal on T2-weighted images. Calcification occurred in two lesions, and three showed contrast enhancement. Complete resection of the tumor was performed in three cases, and subtotal resection in other three cases. Pathological features included oligodendroglial-like cells, glioneural component, and few cases showed dysplastic cortical disorganization. The postoperative period of follow-up ranged from 2 to 18 months. Four patients were seizure free, two of which had subtotal resection of the lesion. The remaining two patients maintained seizures. CONCLUSIONS The clinical, imagiological and histopathological data of the six cases presented are generally compatible with those of the reports reviewed by the authors. The imagiological features are nonspecific. Surgical treatment permits histological diagnosis and epilepsy control.
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[Isolation of Mycoplasma bovis during an outbreak of bovine mastitis at a dairy farm in the province of Buenos Aires. 1st report in the Republic of Argentina]. REVISTA LATINOAMERICANA DE MICROBIOLOGIA 2000; 42:7-11. [PMID: 10948823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
Several mycoplasma species produce various diseases in different animal species. M. bovis has been described as the cause of mastitis, arthritis, pneumonia and infertility in cattle. Furthermore, this species has been the most frequently isolated agent producing bovine mastitis. The objective of this study was to isolate and typify mycoplasma strains from a clinical mastitis outbreak in a dairy farm of Buenos Aires Province. A total of 279 samples were studied (276 from pooled quarter milk of cows with clinical mastitis that did not respond to antibiotic therapy, 1 from bulk tank milk and 2 preputial swabs from bulls). The isolated mycoplasma strains (n = 12) were further characterized by biochemical analysis, serological studies and electrophoretic analysis of the protein profiles (SDS-PAGE). Based upon these studies, the isolated strains were identified as Mycoplasma bovis. This is the first report of isolation of this microorganism in Argentina. Therefore the results described here could be very useful to improve mastitis control in dairy farms.
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Endovascular treatment of an intracranial dural arteriovenous fistula with spinal venous drainage. A case report. Interv Neuroradiol 1998; 4:241-6. [PMID: 20673416 DOI: 10.1177/159101999800400308] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/1998] [Accepted: 06/20/1998] [Indexed: 11/15/2022] Open
Abstract
SUMMARY A case of type V intracranial dural arteriovenous fistula (DAVF) is reported because of its unusual rapidly progressive paraparesis, Despite this clinical presentation, the diagnosis of DAVF was made and precocious endovascular treatment was instituted, Angiographic normalization was obtained after embolisation and the patient significantly improved within the first weeks, although at the six month control MRI there still was a hyperintense signal of the cord in T2 weighted images, but less extensive than originally.
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Influence of DDD Pacing on LV Parameters in Hypertrophic Obstructive Cardiomyopathy: Results of the PIC Study. J Am Coll Cardiol 1998. [DOI: 10.1016/s0735-1097(97)84501-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Influence of DDD pacing on LV parameters in hypertrophic obstructive cardiomyopathy: results of the PIC study. J Am Coll Cardiol 1998. [DOI: 10.1016/s0735-1097(98)81435-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Pentalogy of Cantrell--a case report. Indian Heart J 1997; 49:547-8. [PMID: 9505030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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[How our pediatric services work]. ACTA MEDICA PORT 1997; 10:141-9. [PMID: 9235845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The results of a questionnaire sent by the College of Pediatrics of the Portuguese Doctors Association (Ordem dos Médicos) to the pediatric departments all over the country are presented. From the answers of fifty-one services, physical conditions, equipment, human resources, assistancial and scientific activities developed are characterized.
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Mesencephalo-diencephalic angioanatomy in arteriovenous malformations. Endovascular management of transmesencephalic vs subependymal supply in 954 cases between 1982 and 1994. Surg Radiol Anat 1994; 16:311-7. [PMID: 7863419 DOI: 10.1007/bf01627689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
This report presents the arteries of the mesencephalo-diencephalic region and their different role in the supply to the cerebral structures. Among them, the authors distinguish the subependymal and transmesencephalic arteries to which they pay a special attention since these vessels present a specific angiographic aspect. The importance of their differentiation is emphasized. The authors discuss the management of subependymal and (trans)mesencephalic arteries during endovascular neuro-intervention illustrative cases.
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[The status of hemoglobin concentration and hematocrit in Angola children]. KINDERARZTLICHE PRAXIS 1992; 60:49-53. [PMID: 1608186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Hemoglobin-concentration (Hb) and hematocrit (Ht) were determined in 622 Angolean children between ages of 3 months and 13 years. The children were divided into two groups: group I (n = 530) of low social and economic state, group II (n = 92) children enjoyed good living conditions. 38.9% of all children had a Hb below 6.8mmol/l. 218 of which were part of group I, only 18 were out of group II. An extensive anemia (less than Hb 4.3mmol/l) existed in only 3% of all children. 51.7% of children were below 3 years. Between age groups of 3 months to over 10 years there was a continual rise in Hb of 17.6 +/- 6.6% (boys) and 9.5 +/- 3% (girls). Using the Ht values the percentage of anemic children was only 16.4%. It existed a relationship, especially, clearly observed in group I, between physical development and aemia frequency. Children of group I were more anemic than children of group II.
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Determination of thorium by Organic bases. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1955. [DOI: 10.1246/bcsj.28.233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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