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Haugen EJ, Locke AK, Correa H, Baba JS, Mahadevan-Jansen A, Hiremath G. Characterization of lamina propria remodeling in pediatric eosinophilic esophagitis using second harmonic generation microscopy. Transl Med Commun 2024; 9:10. [PMID: 38698908 PMCID: PMC11065090 DOI: 10.1186/s41231-024-00170-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Accepted: 03/17/2024] [Indexed: 05/05/2024]
Abstract
Eosinophilic esophagitis (EoE) is a chronic inflammatory condition characterized by an intense infiltration of eosinophils into the esophageal epithelium. When not adequately controlled, eosinophilic inflammation can lead to changes in components of the extracellular matrix (ECM) of the lamina propria. Particularly, alterations to the collagen fiber matrix can lead to lamina propria fibrosis (LPF), which plays an important role in the fibrostenotic complications of EoE. Current approaches to assess LPF in EoE are prone to inter-observer inconsistencies and provide limited insight into the structural remodeling of the ECM. An objective approach to quantify LPF can eliminate inter-observer inconsistencies and provide novel insights into the fibrotic transformation of the lamina propria in EoE. Second harmonic generation (SHG) microscopy is a powerful modality for objectively quantifying disease associated alterations in ECM collagen structure that is finding increasing use for clinical research. We used SHG with morphometric analysis (SHG-MA) to characterize lamina propria collagen fibers and ECM porosity in esophageal biopsies collected from children with active EoE (n = 11), inactive EoE (n = 11), and non-EoE (n = 11). The collagen fiber width quantified by SHG-MA correlated positively with peak eosinophil count (r = 0.65, p < 0.005) and histopathologist scoring of LPF (r = 0.52, p < 0.005) in the esophageal biopsies. Patients with active EoE had a significant enlargement of ECM pores compared to inactive EoE and non-EoE (p < 0.005), with the mean pore area correlating positively with EoE activity (r = 0.76, p < 0.005) and LPF severity (r = 0.65, p < 0.005). These results indicate that SHG-MA can be utilized to objectively characterize and provide novel insights into lamina propria ECM structural remodeling in children with EoE, which could aid in monitoring disease progression.
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Affiliation(s)
- Ezekiel J. Haugen
- Vanderbilt Biophotonics Center, Vanderbilt University, Nashville, TN 37232, USA
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN 37232, USA
| | - Andrea K. Locke
- Vanderbilt Biophotonics Center, Vanderbilt University, Nashville, TN 37232, USA
- Department of Chemistry, Vanderbilt University, Nashville, TN 37232, USA
| | - Hernán Correa
- Division of Pediatric Pathology, Monroe Carell Jr. Children’s Hospital at Vanderbilt, Vanderbilt University Medical Center, Nashville, TN 27232, USA
| | - Justin S. Baba
- Vanderbilt Biophotonics Center, Vanderbilt University, Nashville, TN 37232, USA
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN 37232, USA
| | - Anita Mahadevan-Jansen
- Vanderbilt Biophotonics Center, Vanderbilt University, Nashville, TN 37232, USA
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN 37232, USA
| | - Girish Hiremath
- Vanderbilt Biophotonics Center, Vanderbilt University, Nashville, TN 37232, USA
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN 37232, USA
- Division of Pediatric Gastroenterology, Hepatology and Nutrition, Monroe Carell Jr. Children’s Hospital at Vanderbilt, Vanderbilt University Medical Center, Nashville, TN 37232, USA
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Mede AI, Campbell BR, Ransom M, Correa H, Engelstad HJ, Whigham AS. CMV-associated Laryngeal Lesion in an Infant. Otolaryngology Case Reports 2022. [DOI: 10.1016/j.xocr.2022.100477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022] Open
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Lara DP, Correa H, Díaz DS. Antiferromagnetic Blume-Capel model of the disordered Fe-Mn-Al ternary system. Phys Rev E 2022; 106:044114. [PMID: 36397541 DOI: 10.1103/physreve.106.044114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Accepted: 09/15/2022] [Indexed: 06/16/2023]
Abstract
The magnetic properties and thermodynamical description of the Fe-Mn-Al ternary alloy are studied using the spin 1 antiferromagnetic Blume-Capel (BC) model by the pair approximation based on the Gibbs-Feymann-Bogoliubov inequality for the free energy. The values of the spin operator are +1 for ferromagnetic interaction (Fe-Fe), -1 for the antiferromagnetic one (Mn-Mn, Mn-Fe), and 0 for the magnetic diluter (corresponding to Al). The BC model with antiferromagnetic (AF) next-nearest-neighbor coupling better accurately fit the mean hyperfine field experimental data obtained by Mössbauer spectroscopy. Considering the crystalline field, the predicted temperature as a function of the Al concentration phase diagram, for the fcc lattice, from the numerical solution is remarkably good and significantly improves the traditional Ising and random-site Ising models.
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Affiliation(s)
- D Peña Lara
- Grupo de Transiciones de Fases y Materiales Funcionales, Departamento de Física, Universidad del Valle, 760032, Cali, Colombia Centro de Excelencia en Nuevos Materiales (CENM), Universidad del Valle, Cali, Colombia
| | - H Correa
- Laboratorio de Optoelectrónica, Universidad del Quindío, 630004, Armenia, Colombia
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Valenzuela F, De La Cruz C, Lecaros C, Fernández J, Hevia G, Maul LV, Thyssen JP, Vera‐Kellet C, Egeberg A, Armijo D, Pizarro C, Riveros T, Correa H, Guglielmetti A, Didaskalu J, Wu JJ, Griffiths CE, Romiti R, Maul J. Comorbidities in Chilean Psoriasis Patients ‐ a Global Healthcare Study on Psoriasis. Clin Exp Dermatol 2022; 47:2234-2241. [PMID: 35988043 PMCID: PMC10092698 DOI: 10.1111/ced.15384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/19/2022] [Indexed: 11/30/2022]
Abstract
BACKGROUND Psoriasis is a chronic inflammatory skin disease associated with several important medical comorbidities. There are scant data available on the comorbidities of patients with psoriasis in South America. AIM To examine the comorbidity profile of adult patients with psoriasis in Chile and its association with severity of psoriasis. METHODS This was a multicentre, cross-sectional study involving 16 hospitals and clinics in Chile, which used a 48-item questionnaire to study clinician- and patient-reported outcomes and comorbidities. Inferential analyses were performed by psoriasis severity, using Fisher exact test, Student t-test and multivariable logistic regression. RESULTS In total, 598 adult patients with psoriasis were included (51.1% male; mean age 49.2 ± 15.1 years); 48.5% mild and 51.4% moderate to severe; Psoriasis Area and Severity Index 11.6 ± 11.5; body surface area 14.7 ± 18.2%. Plaque psoriasis was the most common phenotype (90.2%), followed by guttate (13.4%). Psoriatic arthritis occurred in 27.3% of patients. Comorbidities were reported in 60.2% of all patients with psoriasis. Frequent concomitant diseases were obesity (25.3%), hypertension (24.3%), Type 2 diabetes mellitus (T2DM) (18.7%), dyslipidaemia (17.4%), metabolic syndrome (16.7%) and depression (14.4%). After adjustment, significant associations were found between moderate to severe psoriasis and obesity, T2DM and nonalcoholic fatty liver disease (NAFLD) compared with mild psoriasis. CONCLUSIONS We report a large study of comorbidities, including depression, dyslipidaemia, T2DM and NAFLD, in people with psoriasis in Chile. The prevalence of comorbidities with psoriasis in Chile appears similar to that found in Western countries, and emphasizes the importance of assessing patients with psoriasis for risk factors for and presence of, comorbid disease in a multidisciplinary setting.
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Affiliation(s)
- Fernando Valenzuela
- Department of Dermatology University of Chile Santiago Chile
- Centro Internacional de Estudios Clínicos, Probity Medical Research Santiago Chile
| | | | - Cristóbal Lecaros
- Department of Dermatology, Clínica Alemana, Universidad del Desarrollo Santiago Chile
| | - Javier Fernández
- Centro Internacional de Estudios Clínicos, Probity Medical Research Santiago Chile
| | - Gonzalo Hevia
- Department of Dermatology, Clínica Alemana, Universidad del Desarrollo Santiago Chile
| | - Lara Valeska Maul
- Department of Dermatology University Hospital Basel Basel Switzerland
| | - Jacob P. Thyssen
- Department of Dermatology, Bispebjerg Hospital Copenhagen Denmark
- University of Copenhagen Denmark
| | - Cristián Vera‐Kellet
- Department of Dermatology; Facultad de Medicina, Pontificia Universidad Católica de Chile Santiago Chile
| | - Alexander Egeberg
- Department of Dermatology, Bispebjerg Hospital Copenhagen Denmark
- University of Copenhagen Denmark
| | | | | | - Tatiana Riveros
- Department of Dermatology, Clínica Alemana, Universidad del Desarrollo Santiago Chile
| | - Hernán Correa
- Centro Dermatológico DERMAMED Santiago Chile
- Department of Dermatology, Hospital Dr. Sótero del Río Santiago Chile
| | | | | | - Jashin J. Wu
- Department of Dermatology University of Miami Miller School of Medicine
| | - Christopher E.M. Griffiths
- Dermatology Centre, Salford Royal Hospital, NIHR Manchester Biomedical Research Centre University of Manchester Manchester UK
- School of Health Sciences, Faculty of Biology, Medicine and Health University of Manchester UK
| | - Ricardo Romiti
- Department of Dermatology University of São Paulo School of Medicine São Paulo Brazil
| | - Julia‐Tatjana Maul
- Faculty of Medicine University of Zurich Zurich Switzerland
- Department of Dermatology University Hospital Zurich Zurich Switzerland
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Saab-Chalhoub MW, Correa H, Anderson JL, Kovach AE, Salaria SN. Civatte Bodies in Pediatric Esophageal Biopsies: Does Lichen Esophagitis Pattern Occur in Children? Pediatr Dev Pathol 2022; 25:458-465. [PMID: 35452319 DOI: 10.1177/10935266221090081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
PURPOSE AND CONTEXT Civatte bodies (CB) are associated with cutaneous and mucosal lichen planus in adults. They are a distinct feature of Lichen Esophagitis Pattern, which is not well described in children. We characterized clinicopathologic associations of archival esophageal CB at our Children's Hospital to determine whether lichen planus or Lichen Esophagitis Pattern occurs in children. METHOD Pathology records were queried for pediatric esophageal biopsy diagnoses containing "CB," "apoptosis, "necrosis," or "dyskeratosis." Cases with concurrent eosinophilic/acute esophagitis were excluded. H&E slides and clinical reports were reviewed. KEY RESULTS Biopsies with CB or similar were identified from 19 patients and had been termed "dyskeratotic cells" in 8 reports. Patients had variable age and presenting symptoms, male predominance (74%), and frequent clinical history of polypharmacy (47%), Crohn disease (42%), and/or celiac disease (21%). Civatte bodies were prominent in the distal esophagus (95%), as few isolated cells (63%), and with variable chronic inflammation (absent, pauci-inflammatory, and lichen planus-like in approximately one-third of cases each). CONCLUSIONS We show that esophageal CB from pediatric patients are under-recognized and may have different features and implications compared to Lichen Esophagitis Pattern in adults. Recognition and documentation of pediatric esophageal CB is needed to understand their clinical significance.
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Affiliation(s)
- Mario W Saab-Chalhoub
- Division of Gastrointestinal Pathology, Department of Pathology, Microbiology & Immunology, 12328Vanderbilt University Medical Center, Nashville, TN, USA
| | - Hernán Correa
- Division of Pediatric Pathology, Department of Pathology, Microbiology & Immunology, Monroe Carell Jr. Children's Hospital at Vanderbilt, 21629Vanderbilt University Medical Center, Nashville, TN, USA
| | - Julia L Anderson
- Division of Gastroenterology, Hepatology and Nutrition, Department of Pediatrics, 12328Vanderbilt University Medical Center, Nashville, TN, USA
| | - Alexandra E Kovach
- Division of Pediatric Pathology, Department of Pathology, Microbiology & Immunology, Monroe Carell Jr. Children's Hospital at Vanderbilt, 21629Vanderbilt University Medical Center, Nashville, TN, USA
| | - Safia N Salaria
- Division of Gastrointestinal Pathology, Department of Pathology, Microbiology & Immunology, 12328Vanderbilt University Medical Center, Nashville, TN, USA
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López J, Diosa J, García G, Mosquera E, Correa H. Temperature-Dependent Potential for the Molecular Dynamics of the superionic conductor β-PbF2. Heliyon 2022; 8:e09026. [PMID: 35252619 PMCID: PMC8892217 DOI: 10.1016/j.heliyon.2022.e09026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Revised: 10/15/2021] [Accepted: 02/24/2022] [Indexed: 11/20/2022] Open
Abstract
Molecular dynamic (MD) calculations were performed to investigate the thermodynamic and structural properties of lead fluoride (PbF2) by using a proposed inter-ionic temperature-dependent potential. This potential allows calculating with high precision the linear thermal expansivity and the lattice parameter as a temperature function. In addition, the potential can be represented as a sum of two contributions, a temperature-independent potential added to another temperature-dependent potential, considered last as a correction justified by the one-dimensional Newtonian quantum equation. Two fitting regions were considered, the first region from 300 to 700 K and the other one from 700 to 900 K. These regions arise naturally due to the smooth and continuous transition that PbF2 undergoes until it reaches the superionic state and, allows us to model with high precision the anomaly in the dependence of the lattice parameter with the temperature of this material, a feature that until now under the molecular dynamic method has not been studied. These results are all in good agreement with the experimental measurements.
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Hughes CE, Correa H, Benedetti DJ, Smith B, Sumegi J, Bridge J. Second Report of PDE10A-BRAF Fusion in Pediatric Spindle Cell Sarcoma With Infantile Fibrosarcoma-Like Morphology Suggesting PDE10A-BRAF Fusion Is a Recurrent Event. Pediatr Dev Pathol 2021; 24:554-558. [PMID: 34120511 PMCID: PMC9843740 DOI: 10.1177/10935266211012186] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Infantile/congenital fibrosarcoma (IFS) is the most common soft tissue tumor in children less than one year of age. The most common anatomic site of IFS is in the extremities or trunk, and rarely in the abdomen or retroperitoneum. Approximately 70-90% of cases are characterized by a distinct t(12;15)(p13;q25) translocation resulting in an ETV6-NTRK3 gene fusion. As such, TRK inhibitors are considered frontline therapy in TRK-fusion positive IFS. The ETV6-NTRK3 fusion is also detected in congenital mesoblastic nephroma (CMN) and less frequently in myeloid leukemias, secretory breast carcinoma, and mammary-type secretory carcinoma of the skin and salivary glands. Infrequently, cases of tumors with IFS-like morphology without the characteristic ETV6-NTRK3 gene fusion have been identified. Herein, an ETV6-NTRK3 fusion negative spindle cell sarcoma with IFS-like morphology subjected to genomic profiling revealed a PDE10A-BRAF fusion, a fusion event that has been detected previously in an isolated case of undifferentiated infantile sarcoma.
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Affiliation(s)
- Caitlin E Hughes
- Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Hernán Correa
- Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Daniel J Benedetti
- Department of Pediatrics, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Brianna Smith
- Department of Pediatrics, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Janos Sumegi
- Division of Molecular Pathology, Translational Genomics Research Institute, Phoenix, Arizona
| | - Julia Bridge
- Division of Molecular Pathology, Translational Genomics Research Institute, Phoenix, Arizona,Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, Nebraska
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Kachinovsky A, Correa H, Magnone M. Producción imaginativo-reflexiva infantil en talleres clínico-narrativos. Psicol USP 2021. [DOI: 10.1590/0103-6564e200060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Resumen El trabajo se centra en la variable subjetiva del aprendizaje: busca identificar las transformaciones psíquicas de seis niños en su tránsito por un dispositivo clínico mediado por cuentos (taller narrativo). El trabajo de campo se desarrolló en una escuela pública, con niños de 6 y 7 años, con pronóstico pedagógico desfavorable. Una herramienta informática organiza el análisis cualitativo y cuantitativo de la producción discursiva infantil. Los resultados ponen de manifiesto un incremento de dicha producción a medida que se fueron desarrollando los talleres y un menor requerimiento de participación del equipo coordinador. Sin embargo, se observa una tendencia decreciente de la producción imaginativo-reflexiva que motiva a focalizar el presente texto en esa dimensión y a dar cuenta de sus posibles causas.
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Burbano JC, Correa H, Peña Lara D. A new position in α-RbAg 4I 5 at room temperature by molecular dynamics simulations. Molecular Simulation 2020. [DOI: 10.1080/08927022.2019.1710143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- J. C. Burbano
- Instituto de Física de São Carlos, Universidade de São Paulo, São o Carlos, Brasil
| | - H. Correa
- Laboratorio de Optoelectrónica, Universidad del Quindío, Armenia, Colombia
| | - D. Peña Lara
- Departamento de Física, Universidad del Valle, Cali, Colombia
- Centro de Excelencia en Nuevos Materiales, Universidad del Valle, Cali, Colombia
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Correa H, Garcia Muriel A, Peña Lara D. Dataset for correlation in γ-RbAg4I5 between ionic conductivity relaxation and specific heat. Data Brief 2019; 26:104404. [PMID: 31867413 PMCID: PMC6904842 DOI: 10.1016/j.dib.2019.104404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Revised: 08/08/2019] [Accepted: 08/09/2019] [Indexed: 11/06/2022] Open
Abstract
Using the ac-calorimetry technique and the electric modulus formalism for analysis of ionic conductivity relaxation in crystalline γ-RbAg4I5, close to the γ to β phase transition at 120 K, the temperature derivative of microscopic interaction energy for a single-mobile ion is proportional to the specific heat. The two different experimental techniques show that cooperative behavior drives the phase transition at 120 K (obey the same mechanism).
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Gorrasi J, Peluffo G, Botti H, Batthyany C, Naviliat M, Barrios E, Correa H, Radi R. Lung nitroxidative stress in mechanically-ventilated septic patients: A pilot study. J Crit Care 2019; 51:204-212. [DOI: 10.1016/j.jcrc.2019.02.017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Revised: 02/07/2019] [Accepted: 02/11/2019] [Indexed: 01/24/2023]
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Aguilera-Insunza R, Correa H, Díaz C, Marinovic MA, Valenzuela F. [Chilean guidelines for chronic urticaria]. Rev Med Chil 2019; 146:1334-1342. [PMID: 30725048 DOI: 10.4067/s0034-98872018001101334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Accepted: 08/30/2018] [Indexed: 11/17/2022]
Affiliation(s)
- Raquel Aguilera-Insunza
- Departamento de Inmunología Clínica y Reumatologia, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Hernán Correa
- Servicio de Dermatología, Hospital Sótero del Río, Santiago, Chile
| | - Carolina Díaz
- Unidad de Inmunología, Clínica Las Condes, Santiago, Chile
| | | | - Fernando Valenzuela
- Departamento de Dermatología, Facultad de Medicina, Universidad de Chile, Santiago, Chile
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Fleming JT, Brignola E, Chen L, Guo Y, Zhao S, Wang Q, Li B, Correa H, Ermilov AN, Dlugosz AA, Chiang C. Insight into the Etiology of Undifferentiated Soft Tissue Sarcomas from a Novel Mouse Model. Mol Cancer Res 2019; 17:1024-1035. [PMID: 30683671 DOI: 10.1158/1541-7786.mcr-18-0117] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Revised: 06/06/2018] [Accepted: 01/22/2019] [Indexed: 11/16/2022]
Abstract
Aberrant activation of the Hedgehog signaling pathway has been linked to the formation of numerous cancer types, including the myogenic soft tissue sarcoma, embryonal rhabdomyosarcoma (eRMS). Here, we report PCG2, a novel mouse model in which human GLI2A, a constitutive activator of Hedgehog signaling, induced undifferentiated sarcomas that were phenotypically divergent from eRMS. Rather, sarcomas arising in PCG2 mice featured some characteristics that were reminiscent of Ewing sarcoma. Even though it is widely understood that Ewing sarcoma formation is driven by EWS-ETS gene fusions, a genetically defined mouse model is not well-established. While EWS-ETS gene fusions were not present in PCG2 sarcomas, precluding their designation as Ewing sarcoma, we did find that GLI2A induced expression of known EWS-ETS gene targets essential to Ewing pathogenesis, most notably, Nkx2.2. Moreover, we found that naïve mesenchymal progenitors originate tumors in PCG2 mice. Altogether, our work provides a novel genetic mouse model, which directly connects oncogenic Hedgehog activity to the etiology of undifferentiated soft tissue sarcomas for the first time. IMPLICATIONS: The finding that activation of Gli2 transcription factor is sufficient to induce Ewing-like sarcomas provides a direct transformative role of the Hedgehog signaling pathway in undifferentiated soft tissue sarcoma.
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Affiliation(s)
- Jonathan T Fleming
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee
| | - Emily Brignola
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee
| | - Lei Chen
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee
| | - Yan Guo
- Department of Cancer Biology, Vanderbilt University, Nashville, Tennessee
| | - Shilin Zhao
- Department of Cancer Biology, Vanderbilt University, Nashville, Tennessee
| | - Quan Wang
- Department of Molecular Physiology and Biophysics, Vanderbilt Genetics Institute, Vanderbilt University, Nashville, Tennessee
| | - Bingshan Li
- Department of Molecular Physiology and Biophysics, Vanderbilt Genetics Institute, Vanderbilt University, Nashville, Tennessee
| | - Hernán Correa
- Department of Pathology, Microbiology and Immunology, Vanderbilt University, Nashville, Tennessee
| | - Alexandre N Ermilov
- Department of Dermatology, University of Michigan Medical School, Ann Arbor, Michigan
| | - Andrzej A Dlugosz
- Departments of Dermatology and Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, Michigan
| | - Chin Chiang
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee.
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Linder JE, Batey K, Johnston R, Cohen EM, Wang Y, Wang X, Zaleski NM, Rogers LM, McDonald WH, Reyzer ML, Judd A, Goldstein J, Correa H, Pulley J, Aronoff DM. The PathLink Acquired Gestational Tissue Bank: Feasibility of Project PLACENTA. J Reprod Biotechnol Fertil 2018; 7:14-27. [PMID: 30637122 PMCID: PMC6326187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
BACKGROUND The Vanderbilt Institute for Clinical and Translational Research piloted the development of Project PLACENTA (PathLink Acquired gEstatioNal Tissue bAnk). This project investigated the feasibility of a fresh gestational tissue biobank, which provides tissue linked to electronic medical records for investigators interested in maternal-fetal health. METHODS We developed a pipeline for collection of placental tissue from Labor and Delivery within approximately 30 minutes of delivery. An email alert was developed, to signal delivery, with the ability to specifically flag patients with certain phenotypic traits. Once collected, 4 to 8 mm punch biopsy cores were snap frozen and subsequently used for DNA, RNA and protein extraction. Tissue was also collected for Formalin Fixed Paraffin Embedded (FFPE) histology, flow cytometry, and quality control measures. RESULTS Of 60 deliveries using the email notification system, 25 (42%) were sent to Pathology or assigned to other research protocols and were not available for collection, 10 (16%) were discarded prior to arrival at Labor and Delivery, and 25 (42%) were available for collection. Twenty placentas were collected and averaged 38 minutes per collection. DNA extraction yielded an average of 53 µg/µl per sample and RNA extraction yielded 679 ng/µl on average per sample. Proteomic studies showed no degradation of protein, abundant and similar quantities of protein across samples and differentiation between the amnion, decidua, and villi. Histological studies showed good quality for interpretation and occasional pathology including multifocal chronic villitis, meconium laden macrophages, and Stage 2 acute chorioamnionitis. Flow cytometry demonstrated good cell viability after isolation.
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Affiliation(s)
- Jodell E Linder
- Vanderbilt Institute for Clinical and Translational Research, Vanderbilt University School of Medicine, 2525 West End, Nashville, Tennessee 37232
| | - Kisha Batey
- Vanderbilt Institute for Clinical and Translational Research, Vanderbilt University School of Medicine, 2525 West End, Nashville, Tennessee 37232
| | - Rebecca Johnston
- Vanderbilt Institute for Clinical and Translational Research, Vanderbilt University School of Medicine, 2525 West End, Nashville, Tennessee 37232
| | - Ethan M Cohen
- Vanderbilt Institute for Clinical and Translational Research, Vanderbilt University School of Medicine, 2525 West End, Nashville, Tennessee 37232
| | - Yu Wang
- Vanderbilt Institute for Clinical and Translational Research, Vanderbilt University School of Medicine, 2525 West End, Nashville, Tennessee 37232
| | - Xiaoming Wang
- Vanderbilt Institute for Clinical and Translational Research, Vanderbilt University School of Medicine, 2525 West End, Nashville, Tennessee 37232
| | - Nicole M Zaleski
- Vanderbilt Institute for Clinical and Translational Research, Vanderbilt University School of Medicine, 2525 West End, Nashville, Tennessee 37232
| | - Lisa M Rogers
- Department of Medicine, Vanderbilt University Medical Center, Medical Center North, Nashville, Tennessee 37232
| | - William Hayes McDonald
- Department of Biochemistry, Vanderbilt University, Medical Research Building III, Nashville, Tennessee 37232
| | - Michelle L Reyzer
- Department of Biochemistry, Vanderbilt University, Medical Research Building III, Nashville, Tennessee 37232
| | - Audra Judd
- Department of Biochemistry, Vanderbilt University, Medical Research Building III, Nashville, Tennessee 37232
| | - Jeffery Goldstein
- Department of Pathology and Laboratory Medicine, Ann and Robert H. Lurie Children's Hospital, Chicago, Illinois 60605
| | - Hernán Correa
- Department of Pathology, Microbiology and Immunology, Vanderbilt University School of Medicine, Vanderbilt Children's Hospital, Nashville, Tennessee 37232
| | - Jill Pulley
- Vanderbilt Institute for Clinical and Translational Research, Vanderbilt University School of Medicine, 2525 West End, Nashville, Tennessee 37232
| | - David M Aronoff
- Department of Medicine, Vanderbilt University Medical Center, Medical Center North, Nashville, Tennessee 37232
- Department of Pathology, Microbiology and Immunology, Vanderbilt University School of Medicine, Vanderbilt Children's Hospital, Nashville, Tennessee 37232
- Department of Obstetrics and Gynecology, Vanderbilt University Medical Center, Medical Center North, Nashville, Tennessee 37232
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15
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Rellinger EJ, Padmanabhan C, Qiao J, Craig BT, An H, Zhu J, Correa H, Waterson AG, Lindsley CW, Beauchamp RD, Chung DH. Isoxazole compound ML327 blocks MYC expression and tumor formation in neuroblastoma. Oncotarget 2017; 8:91040-91051. [PMID: 29207623 PMCID: PMC5710904 DOI: 10.18632/oncotarget.19406] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Accepted: 07/03/2017] [Indexed: 12/22/2022] Open
Abstract
Neuroblastomas are the most common extracranial solid tumors in children and arise from the embryonic neural crest. MYCN-amplification is a feature of ∼30% of neuroblastoma tumors and portends a poor prognosis. Neural crest precursors undergo epithelial-to-mesenchymal transition (EMT) to gain migratory potential and populate the sympathoadrenal axis. Neuroblastomas are posited to arise due to a blockade of neural crest differentiation. We have recently reported effects of a novel MET inducing compound ML327 (N-(3-(2-hydroxynicotinamido) propyl)-5-phenylisoxazole-3-carboxamide) in colon cancer cells. Herein, we hypothesized that forced epithelial differentiation using ML327 would promote neuroblastoma differentiation. In this study, we demonstrate that ML327 in neuroblastoma cells induces a gene signature consistent with both epithelial and neuronal differentiation features with adaptation of an elongated phenotype. These features accompany induction of cell death and G1 cell cycle arrest with blockage of anchorage-independent growth and neurosphere formation. Furthermore, pretreatment with ML327 results in persistent defects in proliferative potential and tumor-initiating capacity, validating the pro-differentiating effects of our compound. Intriguingly, we have identified destabilization of MYC signaling as an early and consistent feature of ML327 treatment that is observed in both MYCN-amplified and MYCN-single copy neuroblastoma cell lines. Moreover, ML327 blocked MYCN mRNA levels and tumor progression in established MYCN-amplified xenografts. As such, ML327 may have potential efficacy, alone or in conjunction with existing therapeutic strategies against neuroblastoma. Future identification of the specific intracellular target of ML327 may inform future drug discovery efforts and enhance our understanding of MYC regulation.
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Affiliation(s)
- Eric J. Rellinger
- Section of Surgical Sciences, Department of Surgery, at Vanderbilt University Medical Center, TN 37232, Nashville, USA
- Department of Pediatric Surgery, at Vanderbilt University Medical Center, TN 37232, Nashville, USA
| | - Chandrasekhar Padmanabhan
- Section of Surgical Sciences, Department of Surgery, at Vanderbilt University Medical Center, TN 37232, Nashville, USA
| | - Jingbo Qiao
- Section of Surgical Sciences, Department of Surgery, at Vanderbilt University Medical Center, TN 37232, Nashville, USA
- Department of Pediatric Surgery, at Vanderbilt University Medical Center, TN 37232, Nashville, USA
| | - Brian T. Craig
- Section of Surgical Sciences, Department of Surgery, at Vanderbilt University Medical Center, TN 37232, Nashville, USA
- Department of Pediatric Surgery, at Vanderbilt University Medical Center, TN 37232, Nashville, USA
| | - Hanbing An
- Section of Surgical Sciences, Department of Surgery, at Vanderbilt University Medical Center, TN 37232, Nashville, USA
| | - Jing Zhu
- Section of Surgical Sciences, Department of Surgery, at Vanderbilt University Medical Center, TN 37232, Nashville, USA
| | - Hernán Correa
- Department of Pathology, at Vanderbilt University Medical Center, TN 37232, Nashville, USA
| | - Alex G. Waterson
- Department of Pharmacology and Vanderbilt Institute of Chemical Biology, at Vanderbilt University Medical Center, TN 37232, Nashville, USA
| | - Craig W. Lindsley
- Department of Pharmacology and Vanderbilt Institute of Chemical Biology, at Vanderbilt University Medical Center, TN 37232, Nashville, USA
| | - R. Daniel Beauchamp
- Section of Surgical Sciences, Department of Surgery, at Vanderbilt University Medical Center, TN 37232, Nashville, USA
- Department of Cancer Biology, at Vanderbilt University Medical Center, TN 37232, Nashville, USA
- Department of Cell and Developmental Biology, at Vanderbilt University Medical Center, TN 37232, Nashville, USA
| | - Dai H. Chung
- Section of Surgical Sciences, Department of Surgery, at Vanderbilt University Medical Center, TN 37232, Nashville, USA
- Department of Cancer Biology, at Vanderbilt University Medical Center, TN 37232, Nashville, USA
- Department of Pediatric Surgery, at Vanderbilt University Medical Center, TN 37232, Nashville, USA
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16
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Correa H, Giesen L, Vial V, González S. [Cutaneous involvement of amyloidosis associated with multiple myeloma]. Med Clin (Barc) 2016; 146:e53. [PMID: 26589734 DOI: 10.1016/j.medcli.2015.09.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2015] [Accepted: 09/07/2015] [Indexed: 11/17/2022]
Affiliation(s)
- Hernán Correa
- Departamento de Dermatología, Hospital Dr. Sótero del Río, Santiago, Chile
| | - Laura Giesen
- Departamento de Dermatología, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile.
| | - Verónica Vial
- Médico General, Universidad de los Andes, Santiago, Chile
| | - Sergio González
- Departamento de Anatomía Patológica, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
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17
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Abstract
Li-Fraumeni syndrome (LFS) is a cancer predisposition syndrome caused by a germline mutation of the TP53 gene on chromosome 17p13.1. It has an autosomal dominant pattern of inheritance with high penetrance. These patients have a very high lifetime cumulative risk of developing multiple malignancies and have a strong family history of early-onset malignancies. The protein p53, encoded by TP53, has a complex set of genome-preserving functions initiated during episodes of cellular stress and DNA damage. In LFS, TP53 gene mutations cause the loss of function of p53, leading to downstream events permissive for development of various malignancies throughout life. The LFS component tumors include soft tissue sarcomas, osteosarcoma, premenopausal breast cancer, brain tumors, and adrenal cortical carcinomas. Multiple types of sarcomas have been reported in association with LFS; this review article will focus on the most frequently encountered pediatric sarcomas associated with TP53 mutations.
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Affiliation(s)
- Hernán Correa
- Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, United States
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Correa H. Measured influence of nutrition on socio-economic development. World Rev Nutr Diet 2015; 20:1-48. [PMID: 1093335 DOI: 10.1159/000396060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Duncan KR, Haltli B, Gill KA, Correa H, Berrué F, Kerr RG. Exploring the diversity and metabolic potential of actinomycetes from temperate marine sediments from Newfoundland, Canada. J Ind Microbiol Biotechnol 2014; 42:57-72. [PMID: 25371290 DOI: 10.1007/s10295-014-1529-x] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2014] [Accepted: 10/17/2014] [Indexed: 10/24/2022]
Abstract
Marine sediments from Newfoundland, Canada were explored for biotechnologically promising Actinobacteria using culture-independent and culture-dependent approaches. Culture-independent pyrosequencing analyses uncovered significant actinobacterial diversity (H'-2.45 to 3.76), although the taxonomic diversity of biotechnologically important actinomycetes could not be fully elucidated due to limited sampling depth. Assessment of culturable actinomycete diversity resulted in the isolation of 360 actinomycetes representing 59 operational taxonomic units, the majority of which (94 %) were Streptomyces. The biotechnological potential of actinomycetes from NL sediments was assessed by bioactivity and metabolomics-based screening of 32 representative isolates. Bioactivity was exhibited by 41 % of isolates, while 11 % exhibited unique chemical signatures in metabolomics screening. Chemical analysis of two isolates resulted in the isolation of the cytotoxic metabolite 1-isopentadecanoyl-3β-D-glucopyranosyl-X-glycerol from Actinoalloteichus sp. 2L868 and sungsanpin from Streptomyces sp. 8LB7. These results demonstrate the potential for the discovery of novel bioactive metabolites from actinomycetes isolated from Atlantic Canadian marine sediments.
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Affiliation(s)
- K R Duncan
- Department of Biomedical Sciences, University of Prince Edward Island, 550 University Avenue, Charlottetown, PE, C1A 4P3, Canada
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Alvim-Soares A, Miranda D, Campos SB, Figueira P, Romano-Silva MA, Correa H. Postpartum depression symptoms associated with Val158Met COMT polymorphism. Arch Womens Ment Health 2013; 16:339-40. [PMID: 23636476 DOI: 10.1007/s00737-013-0349-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2012] [Accepted: 03/27/2013] [Indexed: 01/18/2023]
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21
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Rippel SW, Acra S, Correa H, Vaezi M, Di Lorenzo C, Walker LS. Pediatric patients with dyspepsia have chronic symptoms, anxiety, and lower quality of life as adolescents and adults. Gastroenterology 2012; 142:754-61. [PMID: 22226783 PMCID: PMC3321087 DOI: 10.1053/j.gastro.2011.12.043] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2011] [Revised: 11/23/2011] [Accepted: 12/20/2011] [Indexed: 12/19/2022]
Abstract
BACKGROUND & AIMS Little is known about long-term health outcomes of children with dyspeptic symptoms. We studied the natural history of pediatric patients with dyspeptic symptoms, with and without histologic reflux, compared with healthy controls. METHODS We performed a prospective study of consecutive new patients, ages 8-16 years, who underwent evaluation for dyspepsia, including upper endoscopy. Patients were assigned to groups with histologic evidence of reflux esophagitis (n = 50), or normal histology results (n = 53). Healthy children were followed up as controls (n = 143). Patients and controls were evaluated 5-15 years later. They provided self-reports on severity of dyspeptic symptoms, use of acid suppression, quality of life, anxiety, and depression. RESULTS When the study began, the groups with histologic evidence of esophagitis and normal histologies did not differ in severity of dyspeptic symptoms, functional disability, or depression. After a mean 7.6-year follow-up period, each group had significantly lower quality-of-life scores and more severe dyspeptic symptoms and functional disability than controls, but did not differ significantly from each other; both groups were significantly more likely than controls to meet criteria for an anxiety disorder. At time of follow-up evaluation, use of acid-suppression medication was significantly greater in the group with histologic evidence for esophagitis, compared with patients who had normal histology findings when the study began. CONCLUSIONS Among pediatric patients with dyspepsia evaluated by endoscopy and biopsy, those with histologic evidence for esophagitis or normal histology findings are at increased risk for chronic dyspeptic symptoms, anxiety disorder, and reduced quality of life in adolescence and young adulthood.
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Affiliation(s)
- Sara W Rippel
- Department of Pediatrics, Division of Gastroenterology, Hepatology & Nutrition, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - Sari Acra
- Department of Pediatrics, Division of Gastroenterology, Hepatology & Nutrition, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - Hernán Correa
- Department of Pathology, Microbiology, and Immunology, Division of Pediatric Pathology, Vanderbilt University, Nashville, TN, USA
| | - Michael Vaezi
- Department of Medicine, Division of Gastroenterology, Hepatology & Nutrition, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - Carlo Di Lorenzo
- Department of Pediatrics, Division of Gastroenterology, Hepatology & Nutrition, Nationwide Children’s Hospital, Columbus, Ohio, USA
| | - Lynn S. Walker
- Department of Pediatrics, Division of Adolescent and Young Adult Heath, Vanderbilt University School of Medicine, Nashville, TN, USA
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22
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Castro ECC, Blazquez C, Boyd J, Correa H, de Chadarevian JP, Felgar RE, Graf N, Levy N, Lowe EJ, Manning JT, Proytcheva MA, Senger C, Shayan K, Sterba J, Werner A, Surti U, Jaffe R. Clinicopathologic features of histiocytic lesions following ALL, with a review of the literature. Pediatr Dev Pathol 2010; 13:225-37. [PMID: 19642834 DOI: 10.2350/09-03-0622-oa.1] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
We describe the clinicopathologic features of 15 patients who had histiocytic lesions that followed acute lymphoblastic leukemia (ALL). Twenty-one separate histiocytic lesions were evaluated that covered a wide spectrum, some conforming to the usual categories of juvenile xanthogranulomas (5), Langerhans' cell histiocytosis (1), Langerhans' cell sarcoma (4), Rosai-Dorfman disease (1), and histiocytic sarcoma (4). Most were atypical for the category by histology, phenotype, or abnormally high turnover rate. Seven low-grade lesions defied easy categorization and were characterized only as "atypical histiocytic lesion" following ALL. For those evaluated, the molecular signature of the prior leukemia was present in the histiocytic lesion. In 3 of 15 patients, the leukemia and histiocytic lesion shared immunoglobulin H or monoclonal TCR gene rearrangements and, in 4 of 15 patients, clonal identity was documented by fluorescence in situ hybridization. Four patients died of progressive disease, 3 of whom had histiocytic sarcoma and 1 who had an atypical lesion. One patient died of recurrent ALL. The other 10 patients are alive, 7 after recurrences and treatment with surgery and/or chemotherapy. The post-ALL lesions are more aggressive than their native counterparts, but despite the demonstration of the presence of the leukemia signature in 7 of 15 patients, the prognosis is generally favorable, except for patients with histiocytic sarcoma. It remains unclear whether the histiocytic lesions arise as a line from the original ALL or whether transdifferentiation is involved.
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Affiliation(s)
- Eumenia C C Castro
- Department of Pathology, Children's Hospital of Pittsburgh, Pittsburgh, PA, USA
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23
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Magno LAV, Miranda DM, Neves FS, Pimenta GJ, Mello MP, De Marco LA, Correa H, Romano-Silva MA. Association between AKT1 but not AKTIP genetic variants and increased risk for suicidal behavior in bipolar patients. Genes, Brain and Behavior 2010; 9:411-8. [DOI: 10.1111/j.1601-183x.2010.00571.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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24
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Carvalho LSC, Correa H, Silva GC, Campos FS, Baião FR, Ribeiro LS, Faria AM, d'Avila Reis D. May genetic factors in fibromyalgia help to identify patients with differentially altered frequencies of immune cells? Clin Exp Immunol 2009; 154:346-52. [PMID: 19037919 DOI: 10.1111/j.1365-2249.2008.03787.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
There is common agreement that fibromyalgia (FM) is an extremely heterogeneous entity. Patients differ in their clinical symptoms, endocrine and immune parameters. In this study we evaluated endocrine and immunological features of distinct subsets of FM patients. In contrast to previous attempts to identify subsets of FM patients, based solely on their psychological and cognitive features, herein we propose to separate FM patients by genetic features. Allelic expression of the polymorphic promoter region of the serotonin transporter (5-HTTLPR) was analysed as a relevant genetic factor for FM. Seventy-five patients meeting the American College of Rheumatology criteria and 27 healthy age-matched controls participated in this study. All controls and FM patients were submitted to genotyping of 5-HTTLPR. Twenty-seven FM patients, who were able to discontinue hypnotic, sedative or psychotropic prescription medications for at least 2 weeks, were then subdivided into L (homozygote LL) or S groups (genotypes LS and SS). They were evaluated for salivary cortisol levels, absolute number of leucocyte subpopulations, including natural killer (NK) cells and activated T and B lymphocytes. Both groups presented decreased cortisol levels, more intense in the L group, increased all B lymphocytes subsets and reduced CD4+CD25high T lymphocytes. The L group had increased CD4+CD25low activated T lymphocytes, while the S group displayed elevated CD4+ human leucocyte antigen D-related (HLA-DR)+ activated T lymphocytes and decreased NK cells. We demonstrate that genetic factors may help to identify FM individuals with differentially altered frequencies of immune cells.
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Affiliation(s)
- L S C Carvalho
- Department of Morphology, Universidade Federal de Minas Gerais, Brazil
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25
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Torres KCL, Souza BR, Miranda DM, Nicolato R, Neves FS, Barros AGA, Dutra WO, Gollob KJ, Correa H, Romano-Silva MA. The leukocytes expressing DARPP-32 are reduced in patients with schizophrenia and bipolar disorder. Prog Neuropsychopharmacol Biol Psychiatry 2009; 33:214-9. [PMID: 19059449 DOI: 10.1016/j.pnpbp.2008.10.020] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2008] [Revised: 10/06/2008] [Accepted: 10/22/2008] [Indexed: 01/13/2023]
Abstract
Bipolar disorder (BPD) and schizophrenia (SCZ) are severe disorders representing an enormous social, familiar and individual burden, being SCZ the most disabling psychiatric disorder characterized by psychosis and cognitive impairment. It is well known that SCZ and BPD are associated with abnormalities in dopamine signaling pathway. Recent data in the literature have demonstrated altered expression levels of some proteins involved in the modulation of this pathway in both brain and peripheral tissues. It was shown that protein and mRNA levels of dopamine and cAMP regulated phosphoprotein (DARPP-32) were downregulated in dorsolateral prefrontal cortex (DLPFC) of patients with SCZ or BPD when compared to controls. Due to the difficulty to access brain tissue and the absence of objective laboratory tests for bio-markers, we measured DARPP-32 expression in blood cell sub-populations (CD4+ T lymphocytes, CD56+ NK cells, CD19+ B lymphocytes and CD14+ monocytes) taking advantage of the close relation of nervous and immune systems. Using flow cytometry as the analytical method, our results have shown that the DARPP-32 expression was diminished in CD4+ T lymphocytes, CD19+ B lymphocytes and CD14+ monocytes of BPD patients and was also decreased in CD4+ T lymphocytes and CD56+ NK cells of SCZ patients. These results showed that DARPP-32 expression in immune cells agrees with reports of reduced DARPP-32 protein in the DLPFC of BPD or SCZ patients. Our data suggest that DARPP-32 expression in PBMC could be used as a source of bio-markers to help in the treatment response of neuropsychiatry disorders as a window to the changes in the brain of those patients.
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Affiliation(s)
- K C L Torres
- Laboratório de Neurociência, Departamento de Saúde Mental, Faculdade de Medicina, Universidade Federal de Minas Gerais, Av Alfredo Balena, 190; Belo Horizonte-MG, Brazil
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Neves FS, Silveira G, Romano-Silva MA, Malloy-Diniz L, Ferreira AA, De Marco L, Correa H. Is the 5-HTTLPR polymorphism associated with bipolar disorder or with suicidal behavior of bipolar disorder patients? Am J Med Genet B Neuropsychiatr Genet 2008; 147B:114-6. [PMID: 17579356 DOI: 10.1002/ajmg.b.30563] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The serotonin transporter gene has a 44 bp insertion/deletion polymorphism within the promoter region (5-HTTLPR) with two allelic forms, the long (L) and the short (S) variants. Association between the low-activity S variant and bipolar disorder (BPD) has been shown but its replication has not been consistent. It has also been described as an association between the S allele and suicidal behavior. Since suicidal behavior is a rather frequent event in BPD, an important question is whether suicidality, instead of bipolarity itself, could be related to S allele. We assessed 351 subjects (167 bipolar inpatients and 184 healthy controls). Diagnosis was conducted by a psychiatrist using a structured interview (MINI-PLUS), according to DSM-IV criteria. Suicidal behavior was assessed using a semi-structured instrument and a review of medical records. Genotyping of the 5-HTTLPR was performed using PCR. There were 77 patients with a history of previous suicide attempts. Bipolar patients and healthy controls showed comparable genotypic and allelic frequencies. Patients carrying the S allele made violent suicide attempts more frequently (chi(2) = 20.2; P = 0.0001) and made more suicide attempts (t = 2.6; P = 0.01). We were able to show an association between the S allele and suicidal behavior but not with BPD. Our data suggest that a phenotypic stratification, taking into account the suicidal behavior history, is of pivotal importance when performing association studies between BPD and 5-HTTLPR genotypes, which could explain previous contradictory results.
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Malloy-Diniz L, Fuentes D, Leite WB, Correa H, Bechara A. Impulsive behavior in adults with attention deficit/ hyperactivity disorder: characterization of attentional, motor and cognitive impulsiveness. J Int Neuropsychol Soc 2007; 13:693-8. [PMID: 17521490 DOI: 10.1017/s1355617707070889] [Citation(s) in RCA: 196] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/27/2006] [Revised: 01/05/2007] [Accepted: 01/08/2007] [Indexed: 11/05/2022]
Abstract
Attention-deficit/hyperactivity disorder (ADHD) is characterized by inattention and/or hyperactivity/impulsivity. Impulsivity persists in adults with ADHD and might be the basis of much of the impairment observed in the daily lives of such individuals. The objective of this study was to address the presence, and more importantly, the three dimensions of impulsivity: attentional, non-planning and motor, in how they may relate to neuropsychological mechanisms of impulse control. We studied a sample of 50 adults with ADHD and 51 healthy comparison controls using the Barratt Impulsivity Scale Version 11 (BIS), and neuropsychological tasks, namely the Continuous Performance Task (CPT-II) and the Iowa Gambling Task (IGT). The ADHD group showed more signs of impulsivity on the three dimensions of BIS, committed more errors of omission and commission on the CPT-II, and made more disadvantageous choices on the IGT. These results support the existence of deficits related to three components of impulsivity: motor, cognitive, and attentional among adults with ADHD. Most importantly, this study also highlights the complementary nature of self-report questionnaires and neuropsychological tasks in the assessment of impulsivity in ADHD adults.
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Affiliation(s)
- L Malloy-Diniz
- Neuropsychology and Neurosciences Research Group, Health Sciences School, FUMEC University, Bairro São Lucas, Brazil.
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Boson WL, Della Manna T, Damiani D, Miranda DM, Gadelha MR, Liberman B, Correa H, Romano-Silva MA, Friedman E, Silva FF, Ribeiro PA, De Marco L. Novel vasopressin type 2 (AVPR2) gene mutations in Brazilian nephrogenic diabetes insipidus patients. ACTA ACUST UNITED AC 2007; 10:157-62. [PMID: 17020465 DOI: 10.1089/gte.2006.10.157] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Nephrogenic diabetes insipidus (NDI) is an inherited disorder characterized by renal resistance to the antidiuretic effect of arginine vasopressin (AVP), resulting in polyuria, polydipsia, and hypoosmolar urine. In the vast majority of cases, NDI is associated with germ-line mutations in the vasopressin receptor type 2 gene (AVPR2) and in about 8% of the cases with the water channel aquaporin-2 gene (AQP-2) mutations. To date, approximately 277 families with 185 germ-line mutations in the AVPR2 gene have been described worldwide. In the present study, the AVPR2 gene was genotyped in eight unrelated Brazilian kindred with NDI. In five of these NDI families, novel mutations were noted (S54R, I130L, S187R, 219delT, and R230P), whereas three seemingly unrelated probands were found to harbor previously described AVPR2 gene mutations (R106C, R137H, R337X). Additionally a novel polymorphism (V281V) was detected. In conclusion, although NDI is a rare disease, the findings of mutations scattered over the entire coding region of the AVPR2 gene are a valuable model to determine structure function relationship in G-protein-coupled receptor related diseases. Furthermore, our data indicate that in Brazil the spectrum of AVPR2 gene mutations is "family specific".
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Affiliation(s)
- W L Boson
- Department of Pharmacology, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
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Garcia R, Arcement C, Hormaza L, Haymon ML, Ward K, Velasco C, Correa H, Congeni JD, Brown R, Tyson P, Udall J, Schmidt-Sommerfeld E. Use of the recto-sigmoid index to diagnose Hirschsprung's disease. Clin Pediatr (Phila) 2007; 46:59-63. [PMID: 17164511 DOI: 10.1177/0009922806289328] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The recto-sigmoid index on barium enema may aid in the diagnosis of Hirschsprung's disease. However, data on its reliability in different age groups are sparse. The recto-sigmoid index and transitional zone were evaluated blindly in 107 patients with diagnostic rectal suction biopsies. Patients were divided into 3 groups: neonates, infants older than 1 month, and children. The recto-sigmoid index and transitional zone agreed with the histopathologic diagnosis in 79% and 87% of the cases, respectively. Their negative predictive values reached clinical significance in infants and children but not in neonates. Their positive predictive values were not significant in any age group. The recto-sigmoid index identified 4 patients with recto-sigmoid Hirschsprung's disease whose diagnosis was missed by evaluating the transitional zone alone.
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Affiliation(s)
- R Garcia
- Department of Pediatrics, Division of Gastroenterology, State University Health Sciences Center, Baton Rouge, Louisiana, USA
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32
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Gutierrez A, Turkewitz LJ, Correa H, England JD. Primary systemic amyloidosis presenting with demyelinating features. Neurol Neurophysiol Neurosci 2006:6. [PMID: 17260083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 01/18/2007] [Accepted: 01/18/2007] [Indexed: 05/13/2023]
Abstract
PURPOSE Primary systemic amyloidosis is a rare disorder that has multisystemic manifestations. The most common neuropathy in systemic amyloidosis is a small-fiber axonal polyneuropathy. When the neuropathy is the presenting feature, diagnosis is usually delayed. The diagnosis of systemic amyloidosis may be more difficult when patients present with an atypical polyneuropathy. METHODS Two cases of primary systemic amyloidosis with a multifocal polyneuropathy with demyelinating features are presented. RESULTS The patients reported in this series with autopsy proven amyloidosis had evidence of a polyneuropathy with demyelinating features. CONCLUSIONS Amyloidosis should be considered in the differential when a patients presents with a polyneuropathy that has demyelinating features.
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Affiliation(s)
- A Gutierrez
- Louisiana State University Health Sciences Center, Department of Neurology and Neuropathology, New Orleans, LA 70112 , USA.
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Zavala-Spinetti L, Breslin MB, Correa H, Bégué RE. Development and evaluation of a DNA vaccine based on Helicobacter pylori urease B: failure to prevent experimental infection in the mouse model. Helicobacter 2006; 11:517-22. [PMID: 17083372 DOI: 10.1111/j.1523-5378.2006.00453.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
BACKGROUND The development of a vaccine against Helicobacter pylori has become a priority to prevent major morbidity and mortality associated with this infection. Our goal was to prepare and evaluate a DNA vaccine based on the urease B gene (ureB). METHODS The ureB gene of H. pylori was amplified and cloned into the eukaryotic expression vector pcDNA3.1/TOPO. Plasmid DNA was purified from transformed Escherichia coli cells and used to immunize mice by the intragastric, intramuscular, intrarectal (40 micro g each) and intranasal (16 micro g) route, three doses every 2 weeks, with CpG oligodeoxynucleotide (ODN) as adjuvant. Four weeks after the third dose, animals were orally challenged with Helicobacter felis and were sacrificed 6 weeks later. The stomach was stained to detect the presence of infection. RESULTS Despite in vitro confirmation of successful cloning and functionality of the ureB gene with expression of a protein morphologically and antigenically identical to urease B, the DNA vaccine did not perform well in vivo. Immunization of mice produced a weak immune response. Overall, intrarectal and intranasal administration seemed more immunogenic than other routes. Protection against challenge was modest and nonsignificant, and slightly better on animals immunized by the intramuscular and intranasal route. CONCLUSION A DNA vaccine based on H. pylori urease B was poorly immunogenic and nonprotective at the conditions evaluated. Higher doses, better adjuvants or a prime-boost approach may circumvent these limitations.
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Affiliation(s)
- Livania Zavala-Spinetti
- Division of Infectious Diseases, Louisiana State University Health Sciences Center, New Orleans, LA, USA
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Bicalho MA, Pimenta GJ, Neves FS, Correa H, de Moraes EN, De Marco L, Romano-Silva MA. Genotyping of the G1463A (Arg441His) TPH2 polymorphism in a geriatric population of patients with major depression. Mol Psychiatry 2006; 11:799-800. [PMID: 16936760 DOI: 10.1038/sj.mp.4001861] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Spinetti N, Zavala-Spinetti L, Hempe J, Correa H, Bégué RE. Effect of long-term Helicobacter felis infection in a mouse model of streptozotocin-induced diabetes. Helicobacter 2005; 10:586-91. [PMID: 16302984 DOI: 10.1111/j.1523-5378.2005.00362.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
Abstract
BACKGROUND We previously REPORTED that mice with diabetes and short-term Helicobacter felis infection had an increase in glycated hemoglobin (HbA1c). Here we report the effect of long-term infection. MATERIALS AND METHODS Six-week-old C57BL/6 mice were injected with streptozotocin to induce diabetes and started on daily insulin. Following streptozotocin injection, animals were paired according to their HbA1c values and randomized to orally receive either H. felis or culture medium alone. Weight and HbA1c were monitored monthly for 6 months. RESULTS Thirty animals corresponding to 15 pairs were included in the study. H. felis-infected diabetic mice developed significantly more gastritis than uninfected animals. Sixteen mice died during the observation period. As compared to uninfected animals, infected mice died more frequently (40% versus 67%, p = .14) and earlier (160 versus 61 days, p = .20); both variables combined showed that H. felis infection significantly decreased the chances of survival during the study period (p = .045). In addition, infected mice showed a trend for higher increase in their HbA1c (0.97 +/- 2.5% versus - 0.22 +/- 3.0%; p = .21) and lower weight gain (2.0 +/- 3.4 g versus 2.9 +/- 2.0 g; p = .15) than uninfected mice. CONCLUSION Long-term H. felis infection had a deleterious effect in mice with streptozotocin-induced diabetes resulting in increased mortality. If the same phenomenon occurs in humans this could lead to interventions to improve the long-term outcome of patients with diabetes.
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Affiliation(s)
- Nelson Spinetti
- Department of Pediatrics, Lousiana State University Health Sciences Center, New Orleans, Louisiana, USA
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Correa H, Campi-Azevedo AC, De Marco L, Boson W, Viana MM, Guimarães MM, Costa E, Miranda DM, Romano-Silva MA. Familial suicide behaviour: association with probands suicide attempt characteristics and 5-HTTLPR polymorphism. Acta Psychiatr Scand 2004; 110:459-64. [PMID: 15521831 DOI: 10.1111/j.1600-0447.2004.00340.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
OBJECTIVE There is compelling evidence that a serotonergic dysfunction may play a major role in suicide behaviour and it has also been demonstrated that suicide is, at least partially, genetically determined. Thus, the serotonin-related genes are the major candidates. Previously a functional polymorphism in the promoter region of the serotonin transporter gene (5-HTTLPR) was identified and the presence of the short allele (S) was found to be associated with a lower level of expression of the gene and lower levels of 5-HT uptake when compared with the long allele (L). The purpose of this study was to evaluate the association between family suicide behaviour history and probands' suicide attempt (SA) history, SA characteristics and 5-HTTLPR genotype. METHOD We genotyped 237 probands (major depressed or schizophrenic patients) and used a semistructured interview to determine probands' SA characteristics and first- and second-degree family suicidal behaviour. RESULTS An association between suicidal family history and proband's SA but not with SA characteristics and probands genotype was found. CONCLUSION Our results suggest that multiple biological and environmental factors underlie familial transmission of suicidal behaviour.
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Affiliation(s)
- H Correa
- Laboratório de Farmacogenética, ICB, UFMG, Belo Horizonte, Brazil.
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Mannick EE, Schurr JR, Zapata A, Lentz JJ, Gastanaduy M, Cote RL, Delgado A, Correa P, Correa H. Gene expression in gastric biopsies from patients infected with Helicobacter pylori. Scand J Gastroenterol 2004; 39:1192-200. [PMID: 15742995 DOI: 10.1080/00365520410003588] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
BACKGROUND Helicobacter pylori infection has protean effects on gene expression in the host gastric mucosa, which have been investigated by gene chip analysis in vitro. In this study the effects of H. pylori infection on host gene expression in the gastric antral mucosa in patients were examined. METHODS One gastric antral biopsy was obtained from a total of 18 untreated patients undergoing routine endoscopic evaluation of chronic abdominal complaints. Nine patients had histologic evidence of H. pylori infection and 9 age- and sex-matched patients had no histologic evidence of H. pylori infection. A microarray analysis was performed using a gene chip containing 35,000 human expressed sequence tags on RNA extracted from endoscopic, gastric antral biopsies, and average gene expression among infected and uninfected patients was compared. RESULTS Underexpressed genes in infected patients' mucosa included gastric intrinsic factor and several metallothionein isoforms. Overexpressed genes in infected patients' mucosa comprised MHC Class II molecules, immunoglobulin and B-cell activation genes, as well as genes known to induce apoptosis. Changes in expression were confirmed for a subset of genes by SYBR green real-time PCR. CONCLUSIONS Microarray analysis of antral biopsies from patients with and without H. pylori infection revealed differential expression of metal regulatory, immunity and inflammation-related genes.
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Affiliation(s)
- E E Mannick
- Louisiana State University, Stanley S Scott Cancer and Depts of Pathology and Genetics, New Orlands, Louisiana 70112, USA.
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Boson WL, Romano-Silva MA, Correa H, Falcão RP, Teixeira-Vidigal PV, De Marco L. Thiopurine methyltransferase polymorphisms in a Brazilian population. Pharmacogenomics J 2004; 3:178-82. [PMID: 12815366 DOI: 10.1038/sj.tpj.6500175] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Thiopurine methyltransferase (TPMT) catalyses the S-methylation of thiopurine drugs. Low-activity phenotypes are correlated with several mutations in the TPMT gene. Polymorphisms of TPMT have been reported for Caucasians, African-Americans and Asians. Since ethnic differences have been demonstrated worldwide, it remains to be elucidated in Brazil. The Brazilian population is the result of five centuries of interethnic crosses between peoples from almost all continents as well as autochthonous Amerindians, all forming the fifth largest and one of the most heterogeneous populations in the world. The frequency of six allelic variants of the TPMT gene, *2 (G238C) (2.2%), *3A (G460A and A719G) (1.5%), *3B (G460A) (0.2%), *3C (A719G) (1.0%), *5 (0%) and *6 (0%) were determined in Brazilian subjects using polymerase chain reaction (PCR)-RFLP and allele-specific PCR-based assays. This study provides the first analysis of TPMT mutant allele frequency in a sample of the Brazilian population.
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Affiliation(s)
- W L Boson
- Departamento de Farmacologia, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
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Le L, Gardner R, Dave M, Correa H, Warrier RP. 94 INCIDENCE OF CONGENITAL ANOMALIES IN CHILDREN WITH WILMS' TUMOR. J Investig Med 2004. [DOI: 10.1136/jim-52-suppl1-647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Spinetti N, Zavala-Spinetti LY, Hempe J, Correa H, Bégué RE. 197 HELICOBACTER INFECTION MODIFIES THE COURSE OF TYPE 1 DIABETES IN MICE. J Investig Med 2004. [DOI: 10.1136/jim-52-suppl1-750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Campi-Azevedo AC, Boson W, De Marco L, Romano-Silva MA, Correa H. Association of the serotonin transporter promoter polymorphism with suicidal behavior. Mol Psychiatry 2003; 8:899-900. [PMID: 14593426 DOI: 10.1038/sj.mp.4001381] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Correa H, De Marco L, Boson W, Viana MM, Lima VFS, Campi-Azevedo AC, Noronha JCM, Guatimosim C, Romano-Silva MA. Analysis of T102C 5HT2A polymorphism in Brazilian psychiatric inpatients: relationship with suicidal behavior. Cell Mol Neurobiol 2002; 22:813-7. [PMID: 12585698 DOI: 10.1023/a:1021873411611] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
1. Central serotonergic dysfunction and genetic factors are associated with suicidal behavior in psychiatric patients. The goal of this study was to examine the association between the 5-HT2A gene polymorphism (102T/C) and suicide in a sample of Brazilian psychiatric inpatients. 2. We studied 225 subjects. Genotypic frequencies were obtained after DNA extraction and the region of 5-HT2A/T102C containing the polymorphic site amplified by the polymerase chain reaction and digested with the restriction enzyme HpaII. 3. No differences were found between patients with and without suicide attempt history. Patients with a history of severe suicide attempts also did not exhibit different genotypic frequencies when compared with patients without a suicide attempt history. 4. These results suggest that the 5HT2A gene polymorphism (102T/C) may not be involved in the genetic susceptibility to suicidal behavior.
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Affiliation(s)
- H Correa
- Department of Morfologia, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil.
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Calore EE, Fratini P, Correa H. Morphometric evaluation of muscle fiber types in different skeletal muscles of rats. J Submicrosc Cytol Pathol 2002; 34:403-7. [PMID: 12575839] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
The purpose of the present work was to study some morphological differences of similar muscle fiber types--classified by ATPase reactions in different muscles of rats. Morphological parameters were used as stereological techniques at light and electron microscopic level. There was a great variation in the diameter of each muscle fiber type of different muscles. The smallest diameter of type 1 myofibers of the soleus was greater than the diameter of type 1 myofibers of other muscles. The diameter of type 1 myofibers of the soleus and of the lateral part of the gastrocnemius was almost twice the diameter of type 1 myofibers of sternocleidomastoid. The lateral and medial parts of gastrocnemius had the largest 2A and 2B muscle fibers. As a whole, among the studied muscles, myofibers of postural muscles of the posterior parts of the posterior limbs had the greatest diameter. Stereological analysis at electron microscopic level revealed that there were differences in the volume density of mitochondria in the different muscles. The quantity of mitochondria was greater in the diaphragm than in the gastrocnemius, soleus and sternocleidomastoid muscles. Our results suggested that the diameter of muscle fibers is more related to the resistance the muscle is submitted than to the continuous necessity of contraction. However, the quantity of mitochondria of oxidative fibers of the diaphragm would be related to continuous necessity of contraction and high oxidative necessity of this muscle.
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Affiliation(s)
- E E Calore
- Mogi das Cruzes University, Medicine School, Mogi das Cruzes, Brazil.
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Ukarapol N, Bégué RE, Hempe J, Correa H, Gómez R, Vargas A. Association between Helicobacter felis-induced gastritis and elevated glycated hemoglobin levels in a mouse model of type 1 diabetes. J Infect Dis 2002; 185:1463-7. [PMID: 11992282 DOI: 10.1086/340211] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2001] [Revised: 01/17/2002] [Indexed: 11/03/2022] Open
Abstract
Helicobacter pylori infection has been described in association with increases in glycated hemoglobin (HbA(1c)) levels in patients with type 1 diabetes. The purpose of the present study was to use an animal model of Helicobacter infection to test, under controlled conditions, the hypothesis that infection is associated with high HbA(1c) levels. Diabetes was induced in C57BL/6 mice by administration of streptozotocin, and the mice were orally inoculated with H. felis. Six weeks after inoculation, infected mice (n=10) showed gastritis scores significantly greater (P=.01) than those of uninfected mice (n=10). HbA(1c) levels were significantly higher in infected mice with gastritis (11.6%; n=6) than in infected mice without gastritis (8.4%; n=4) or uninfected mice (7.6%; n=10). It was concluded that gastritis induced by H. felis is associated with increased HbA(1c) levels in the mouse model of streptozotocin-induced diabetes.
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Affiliation(s)
- Nuthapong Ukarapol
- Department of Pediatrics, Louisiana State University Health Sciences Center, New Orleans, LA 70118, USA
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Zhang Z, Correa H, Bégué RE. Tuberculosis and treatment with infliximab. N Engl J Med 2002; 346:623-6. [PMID: 11859880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
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Craver RD, Scheer WD, Correa H, Vehaskari VM, Yu LC. Hodgkin lymphoma in a renal transplant recipient associated with low peripheral blood Epstein-Barr virus genome copies. Arch Pathol Lab Med 2001; 125:1480-2. [PMID: 11698007 DOI: 10.5858/2001-125-1480-hliart] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Posttransplant lymphoproliferative disorders are often accompanied by >500 Epstein-Barr virus (EBV) genome copies/10(5) lymphocytes, and they occur shortly after transplantation. Hodgkin lymphoma occurs rarely after transplantation, appearing a mean of 4.2 years posttransplant, and although Hodgkin lymphoma has strong associations with EBV, no quantitative analysis of peripheral blood EBV genome copies has been reported. A mixed cellularity Hodgkin lymphoma developed in a 17-year-old boy 4 years after a renal transplant. Serial EBV genome copy numbers from blood by competitive polymerase chain reaction had been obtained to assess for lymphoproliferative disease. Epstein-Barr virus genome copy numbers peaked at 500 copies/10(5) lymphocytes 8 months prior to Hodgkin lymphoma diagnosis but fell to 8 copies/10(5) lymphocytes at diagnosis. Reliance on EBV levels greater than 500 copies may result in delay of biopsy and diagnosis of Hodgkin disease in the posttransplant setting.
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Affiliation(s)
- R D Craver
- Department of Pathology, Louisiana State University Medical Center, New Orleans, LA, USA.
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Rello J, Paiva JA, Baraibar J, Barcenilla F, Bodi M, Castander D, Correa H, Diaz E, Garnacho J, Llorio M, Rios M, Rodriguez A, Solé-Violán J. International Conference for the Development of Consensus on the Diagnosis and Treatment of Ventilator-associated Pneumonia. Chest 2001; 120:955-70. [PMID: 11555535 DOI: 10.1378/chest.120.3.955] [Citation(s) in RCA: 167] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Ventilator-associated pneumonia (VAP) is an important health problem that still generates great controversy. A consensus conference attended by 12 researchers from Europe and Latin America was held to discuss strategies for the diagnosis and treatment of VAP. Commonly asked questions concerning VAP management were selected for discussion by the participating researchers. Possible answers to the questions were presented to the researchers, who then recorded their preferences anonymously. This was followed by open discussion when the results were known. In general, peers thought that early microbiological examinations are warranted and contribute to improving the use of antibiotherapy. Nevertheless, no consensus was reached regarding choices of antimicrobial agents or the optimal duration of therapy. Piperacillin/tazobactam was the preferred choice for empiric therapy, followed by a cephalosporin with antipseudomonal activity and a carbapenem. All the peers agreed that the pathogens causing VAP and multiresistance patterns in their ICUs were substantially different from those reported in studies in the United States. Pathogens and multiresistance patterns also varied from researcher to researcher inside the group. Consensus was reached on the importance of local epidemiology surveillance programs and on the need for customized empiric antimicrobial choices to respond to local patterns of pathogens and susceptibilities.
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Affiliation(s)
- J Rello
- Hospital Universitari Joan XXIII, Tarragona, Spain.
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Duval F, Mokrani MC, Correa H, Bailey P, Valdebenito M, Monreal J, Crocq MA, Macher JP. Lack of effect of HPA axis hyperactivity on hormonal responses to d-fenfluramine in major depressed patients: implications for pathogenesis of suicidal behaviour. Psychoneuroendocrinology 2001; 26:521-37. [PMID: 11337135 DOI: 10.1016/s0306-4530(01)00011-7] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
There is evidence for inhibitory effects of adrenocorticosteroids on serotonergic (5-HT) activity. However, in depression the relationship between altered cortisol levels and brain 5-HT function remains to be clarified. The aim of this study was to investigate whether hypothalamic-pituitary-adrenal (HPA) axis hyperactivity is associated with 5-HT dysfunction in depressed patients, especially in those with suicidal behaviour. Cortisol levels following the dexamethasone suppression test (DST, 1 mg PO) and prolactin, corticotropin and cortisol responses to the d-fenfluramine test (d-FEN, 45 mg PO) - a specific 5-HT releaser/uptake inhibitor - were measured in 71 drug-free DSM-IV major depressed inpatients (40 with a history of suicide attempt, 31 without) and 34 hospitalized healthy control subjects. Depressed patients showed higher post-DST cortisol levels but similar responses to d-FEN compared with control subjects. Hormonal responses to d-FEN were not correlated with cortisol levels (basal or post-DST). Among the depressed patients, DST suppressors and DST nonsuppressors exhibited no significant difference in endocrine responses to d-FEN. However, patients with a history of suicide attempt, when compared with patients without such a history, showed lower hormonal responses to d-FEN but comparable basal and post-DST cortisol levels. Taken together these results suggest that, in depression, HPA axis hyperactivity is not responsible for the reduced 5-HT activity found in patients with a history of suicidal behavior.
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Affiliation(s)
- F Duval
- Centre Hospitalier, 27 rue du 4ème Spahis Marocain, 68250, Rouffach, France
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Abstract
We present a 10-day-old boy who developed fulminant urosepsis. At autopsy, he was found to have a prostatic abscess as his sole source of infection. We reviewed the 12 previous reported cases of prostatic abscess in newborns and present factors that may suggest the diagnosis. The treatment and outcome in each of the cases are also presented.
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Affiliation(s)
- S M Collins
- Louisiana State University, Children's Hospital, New Orleans, Louisiana, USA
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