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Duarte-Rodríguez DA, Flores-Lujano J, McNally RJQ, Pérez-Saldivar ML, Jiménez-Hernández E, Martín-Trejo JA, Espinoza-Hernández LE, Medina-Sanson A, Paredes-Aguilera R, Merino-Pasaye LE, Velázquez-Aviña MM, Torres-Nava JR, Espinosa-Elizondo RM, Amador-Sánchez R, Dosta-Herrera JJ, Mondragón-García JA, González-Ulibarri JE, Martínez-Silva SI, Espinoza-Anrubio G, Paz-Bribiesca MM, Salcedo-Lozada P, Landa-García RÁ, Ramírez-Colorado R, Hernández-Mora L, Santamaría-Ascencio M, López-Loyola A, Godoy-Esquivel AH, García-López LR, Anguiano-Ávalos AI, Mora-Rico K, Castañeda-Echevarría A, Rodríguez-Jiménez R, Cibrian-Cruz JA, Solís-Labastida KA, Cárdenas-Cardos R, López-Santiago N, Flores-Villegas LV, Peñaloza-González JG, González-Ávila AI, Sánchez-Ruiz M, Rivera-Luna R, Rodríguez-Villalobos LR, Hernández-Pérez F, Olvera-Durán JÁ, García-Cortés LR, Mata-Rocha M, Sepúlveda-Robles OA, Bekker-Méndez VC, Jiménez-Morales S, Meléndez-Zajgla J, Rosas-Vargas H, Vega E, Núñez-Enríquez JC, Mejía-Aranguré JM. Evidence of spatial clustering of childhood acute lymphoblastic leukemia cases in Greater Mexico City: report from the Mexican Inter-Institutional Group for the identification of the causes of childhood leukemia. Front Oncol 2024; 14:1304633. [PMID: 38420017 PMCID: PMC10899509 DOI: 10.3389/fonc.2024.1304633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Accepted: 01/11/2024] [Indexed: 03/02/2024] Open
Abstract
Background A heterogeneous geographic distribution of childhood acute lymphoblastic leukemia (ALL) cases has been described, possibly, related to the presence of different environmental factors. The aim of the present study was to explore the geographical distribution of childhood ALL cases in Greater Mexico City (GMC). Methods A population-based case-control study was conducted. Children <18 years old, newly diagnosed with ALL and residents of GMC were included. Controls were patients without leukemia recruited from second-level public hospitals, frequency-matched by sex, age, and health institution with the cases. The residence address where the patients lived during the last year before diagnosis (cases) or the interview (controls) was used for geolocation. Kulldorff's spatial scan statistic was used to detect spatial clusters (SCs). Relative risks (RR), associated p-value and number of cases included for each cluster were obtained. Results A total of 1054 cases with ALL were analyzed. Of these, 408 (38.7%) were distributed across eight SCs detected. A relative risk of 1.61 (p<0.0001) was observed for the main cluster. Similar results were noted for the remaining seven ones. Additionally, a proximity between SCs, electrical installations and petrochemical facilities was observed. Conclusions The identification of SCs in certain regions of GMC suggest the possible role of environmental factors in the etiology of childhood ALL.
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Affiliation(s)
- David Aldebarán Duarte-Rodríguez
- División de Desarrollo de la Investigación en Salud, Coordinación de Investigación en Salud, Centro Médico Nacional (CMN) “Siglo XXI”, Instituto Mexicano del Seguro Social (IMSS), Ciudad de Mexico, Mexico
| | - Janet Flores-Lujano
- Unidad de Investigación Médica en Epidemiología Clínica, Unidad Médica de Alta Especialidad (UMAE), Hospital de Pediatría, Centro Médico Nacional (CMN) “Siglo XXI”, Instituto Mexicano del Seguro Social (IMSS), Ciudad de Mexico, Mexico
| | - Richard J. Q. McNally
- Population Health Sciences Institute, Newcastle University, Royal Victoria Infirmary, Newcastle upon Tyne, United Kingdom
| | - María Luisa Pérez-Saldivar
- Unidad de Investigación Médica en Epidemiología Clínica, Unidad Médica de Alta Especialidad (UMAE), Hospital de Pediatría, Centro Médico Nacional (CMN) “Siglo XXI”, Instituto Mexicano del Seguro Social (IMSS), Ciudad de Mexico, Mexico
| | - Elva Jiménez-Hernández
- Servicio de Oncología, Hospital Pediátrico “Moctezuma”, Secretaría de Salud de la Ciudad de Mexico (SEDESA), Ciudad de Mexico, Mexico
| | - Jorge Alfonso Martín-Trejo
- Servicio de Hematología, Unidad Médica de Alta Especialidad Hospital de Pediatría, Centro Médico Nacional (CMN) “Siglo XXI”, Instituto Mexicano del Seguro Social (IMSS), Ciudad de Mexico, Mexico
| | - Laura Eugenia Espinoza-Hernández
- Servicio de Hematología, Unidad Médica de Alta Especialidad Hospital de Pediatría, Centro Médico Nacional (CMN) “Siglo XXI”, Instituto Mexicano del Seguro Social (IMSS), Ciudad de Mexico, Mexico
| | - Aurora Medina-Sanson
- Departamento de Hemato-Oncología, Hospital Infantil de Mexico “Federico Gómez”, Secretaría de Salud (SS), Ciudad de Mexico, Mexico
| | | | - Laura Elizabeth Merino-Pasaye
- Servicio de Hematología Pediátrica, Centro Médico Nacional (CMN) “20 de Noviembre”, Instituto de Seguridad Social al Servicio de los Trabajadores del Estado (ISSSTE), Ciudad de Mexico, Mexico
| | | | - José Refugio Torres-Nava
- Servicio de Oncología, Hospital Pediátrico “Moctezuma”, Secretaría de Salud de la Ciudad de Mexico (SEDESA), Ciudad de Mexico, Mexico
| | | | - Raquel Amador-Sánchez
- Servicio de Hematología Pediátrica, Hospital General Regional (HGR) No 1 “Dr Carlos MacGregor Sánchez Navarro” Instituto Mexicano del Seguro Social (IMSS), Ciudad de Mexico, Mexico
| | - Juan José Dosta-Herrera
- Servicio de Cirugía Pediátrica, Hospital General “Gaudencio González Garza”, Centro Médico Nacional (CMN) “La Raza”, Instituto Mexicano del Seguro Social (IMSS), Ciudad de Mexico, Mexico
| | - Javier Anastacio Mondragón-García
- Servicio de Cirugía Pediátrica, Hospital General Regional (HGR) No 1 “Dr Carlos MacGregor Sánchez Navarro” Instituto Mexicano del Seguro Social (IMSS), Ciudad de Mexico, Mexico
| | | | - Sofía Irene Martínez-Silva
- Hospital Pediátrico de Iztapalapa, Secretaría de Salud de la Ciudad de Mexico (SEDESA), Ciudad de Mexico, Mexico
| | - Gilberto Espinoza-Anrubio
- Servicio de Pediatría, Hospital General Zona (HGZ) No 8 “Dr Gilberto Flores Izquierdo”, Instituto Mexicano del Seguro Social (IMSS), Ciudad de Mexico, Mexico
| | | | - Perla Salcedo-Lozada
- Hospital General de Ecatepec “Las Américas”, Instituto de Salud del Estado de Mexico (ISEM), Ecatepec de Morelos, Mexico
| | | | - Rosario Ramírez-Colorado
- Hospital Pediátrico “La Villa”, Secretaría de Salud de la Ciudad de Mexico (SEDESA), Ciudad de Mexico, Mexico
| | - Luis Hernández-Mora
- Hospital Pediátrico “San Juan de Aragón”, Secretar´ıa de Salud de la Ciudad de Mexico (SEDESA), Ciudad de Mexico, Mexico
| | - Marlene Santamaría-Ascencio
- Servicio de Pediatría, Hospital General Regional (HGR) No 72 “Lic. Vicente Santos Guajardo”, Instituto Mexicano del Seguro Social (IMSS), Tlalnepantla de Baz, Mexico
| | - Anselmo López-Loyola
- Servicio de Cirugía Pediátrica, Hospital General Zona (HGZ) No. 32, Instituto Mexicano del Seguro Social (IMSS), Ciudad de Mexico, Mexico
| | - Arturo Hermilo Godoy-Esquivel
- Servicio de Cirugía Pediátrica, Hospital Pediátrico de Moctezuma, Secretaría de Salud de la Ciudad de Mexico (SEDESA), Ciudad de Mexico, Mexico
| | - Luis Ramiro García-López
- Servicio de Pediatría, Hospital Pediátrico de Tacubaya, Secretaría de Salud de la Ciudad de Mexico (SEDESA), Ciudad de Mexico, Mexico
| | - Alison Ireri Anguiano-Ávalos
- Urgencias Pediátricas, Hospital General Zona (HGZ) No 47, Instituto Mexicano del Seguro Social (IMSS), Ciudad de Mexico, Mexico
| | - Karina Mora-Rico
- Servicio de Cirugía Pediátrica, Hospital Regional “1° Octubre”, Instituto de Seguridad Social al Servicio de los Trabajadores del Estado (ISSSTE), Instituto Politécnico Nacional 1669, Revolución Instituto Mexicano del Seguro Social (IMSS), Ciudad de Mexico, Mexico
| | - Alejandro Castañeda-Echevarría
- Servicio de Pediatría, Hospital General Regional (HGR) No. 25 Instituto Mexicano del Seguro Social (IMSS), Ciudad de Mexico, Mexico
| | - Roberto Rodríguez-Jiménez
- Servicio de Pediatría, Hospital General de Zona con Medicina Familiar (HGZMF) No. 29, Instituto Mexicano del Seguro Social (IMSS), Ciudad de Mexico, Mexico
| | - José Alberto Cibrian-Cruz
- Servicio de Cirugía Pediátrica, Hospital General Zona (HGZ) No. 27, Instituto Mexicano del Seguro Social (IMSS), Ciudad de Mexico, Mexico
| | - Karina Anastacia Solís-Labastida
- Servicio de Hematología, Unidad Médica de Alta Especialidad Hospital de Pediatría, Centro Médico Nacional (CMN) “Siglo XXI”, Instituto Mexicano del Seguro Social (IMSS), Ciudad de Mexico, Mexico
| | - Rocío Cárdenas-Cardos
- Servicio de Oncología, Instituto Nacional de Pediatr´ıa (INP), SS, Ciudad de Mexico, Mexico
| | - Norma López-Santiago
- Servicio de Hematología, Instituto Nacional de Pediatría (INP), SS, Ciudad de Mexico, Mexico
| | - Luz Victoria Flores-Villegas
- Servicio de Hematología Pediátrica, Centro Médico Nacional (CMN) “20 de Noviembre”, Instituto de Seguridad Social al Servicio de los Trabajadores del Estado (ISSSTE), Ciudad de Mexico, Mexico
| | - José Gabriel Peñaloza-González
- Servicio de Onco-Pediatría, Hospital Juárez de Mexico, SS, Instituto Politécnico Nacional 5160, Ciudad de Mexico, Mexico
| | - Ana Itamar González-Ávila
- Servicio de Hematología Pediátrica, Hospital General Regional (HGR) No 1 “Dr Carlos MacGregor Sánchez Navarro” Instituto Mexicano del Seguro Social (IMSS), Ciudad de Mexico, Mexico
| | - Martin Sánchez-Ruiz
- Hospital General de Ecatepec “Las Américas”, Instituto de Salud del Estado de Mexico (ISEM), Ecatepec de Morelos, Mexico
| | - Roberto Rivera-Luna
- Servicio de Oncología, Instituto Nacional de Pediatr´ıa (INP), SS, Ciudad de Mexico, Mexico
| | - Luis Rodolfo Rodríguez-Villalobos
- Servicio de Pediatría, Hospital Pediátrico de Tacubaya, Secretaría de Salud de la Ciudad de Mexico (SEDESA), Ciudad de Mexico, Mexico
| | - Francisco Hernández-Pérez
- Urgencias Pediátricas, Hospital General Zona (HGZ) No 47, Instituto Mexicano del Seguro Social (IMSS), Ciudad de Mexico, Mexico
| | - Jaime Ángel Olvera-Durán
- Servicio de Cirugía Pediátrica, Hospital Regional “1° Octubre”, Instituto de Seguridad Social al Servicio de los Trabajadores del Estado (ISSSTE), Instituto Politécnico Nacional 1669, Revolución Instituto Mexicano del Seguro Social (IMSS), Ciudad de Mexico, Mexico
| | - Luis Rey García-Cortés
- Delegación Regional Estado de Mexico Oriente, Instituto Mexicano del Seguro Social (IMSS), Naucalpan de Juárez, Mexico
| | - Minerva Mata-Rocha
- Laboratorio de Biología Molecular, Unidad Me´dica de Alta Especialidad (UMAE), Hospital de Pediatría, Centro Me´dico Nacional (CMN) “Siglo XXI”, Instituto Mexicano del Seguro Social (IMSS), Ciudad de Mexico, Mexico
| | - Omar Alejandro Sepúlveda-Robles
- Laboratorio de Biología Molecular, Unidad Me´dica de Alta Especialidad (UMAE), Hospital de Pediatría, Centro Me´dico Nacional (CMN) “Siglo XXI”, Instituto Mexicano del Seguro Social (IMSS), Ciudad de Mexico, Mexico
| | - Vilma Carolina Bekker-Méndez
- Unidad de Investigación Médica en Inmunología e Infectología, Hospital de Infectología “Dr Daniel Méndez Hernández”, Centro Me´dico Nacional (CMN) “La Raza”, Instituto Mexicano del Seguro Social (IMSS), Ciudad de Mexico, Mexico
| | - Silvia Jiménez-Morales
- Laboratory of Innovation and Precision Medicine, Nucleus A. Instituto Nacional de Medicina Genómica (INMEGEN), Ciudad de Mexico, Mexico
| | - Jorge Meléndez-Zajgla
- Laboratorio de Genómica Funcional del Cáncer, Instituto Nacional de Medicina Genómica (INMEGEN), Ciudad de Mexico, Mexico
| | - Haydée Rosas-Vargas
- Unidad de Investigación Médica en Genética Humana, Unidad Me´dica de Alta Especialidad (UMAE), Hospital de Pediatría, Centro Me´dico Nacional (CMN) “Siglo XXI”, Instituto Mexicano del Seguro Social (IMSS), Ciudad de Mexico, Mexico
| | - Elizabeth Vega
- Instituto de Ciencias de la Atmósfera y Cambio Climático, Universidad Nacional Autónoma de Mexico (UNAM), Ciudad de Mexico, Mexico
| | - Juan Carlos Núñez-Enríquez
- Unidad de Investigación Médica en Epidemiología Clínica, Unidad Médica de Alta Especialidad (UMAE), Hospital de Pediatría, Centro Médico Nacional (CMN) “Siglo XXI”, Instituto Mexicano del Seguro Social (IMSS), Ciudad de Mexico, Mexico
- División de Investigación en Salud, Unidad Me´dica de Alta Especialidad (UMAE) Hospital de Pediatría “Dr. Silvestre Frenk Freund”, Centro Me´dico Nacional (CMN) “Siglo XXI”, Instituto Mexicano del Seguro Social (IMSS), Ciudad de Mexico, Mexico
| | - Juan Manuel Mejía-Aranguré
- Laboratorio de Genómica Funcional del Cáncer, Instituto Nacional de Medicina Genómica (INMEGEN), Ciudad de Mexico, Mexico
- Facultad de Medicina, Universidad Nacional Autónoma de Mexico (UNAM), Ciudad de Mexico, Mexico
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Magenis ML, de Faveri W, Castro K, Forte GC, Grande AJ, Perry IS. Down syndrome and breastfeeding: A systematic review. JOURNAL OF INTELLECTUAL DISABILITIES : JOID 2022; 26:244-263. [PMID: 33234015 DOI: 10.1177/1744629520970078] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Several conditions related to serious difficulty in initiating and maintaining breastfeeding in neonates with Down syndrome are described in the literature. This study aimed to investigate the frequency of breastfeeding in neonates with Down syndrome, as well as the reasons for not breastfeeding, through a systematic literature review by searching MEDLINE via PubMed, Cochrane Library, Scopus, Embase via Elsevier, and Cumulative Index to Nursing and Allied Health Literature (CINAHL) databases. Sixteen studies were included with a total sample size of 2022 children with Down syndrome. The frequency of exclusive breastfeeding was 31.6-55.4%, with five studies reporting breastfeeding for longer than 6 months. Breastfeeding from birth was present for 48-92.5% of the children with Down syndrome in six studies. Two studies reported that around 50% and 23.3% of the children with Down syndrome were never breastfed, and rates of breastfeeding in infants with Down syndrome were lower than those in controls in three studies. The reasons for not breastfeeding or cessation of breastfeeding were associated with Down syndrome-specific challenges, maternal reasons, and healthcare aspects.
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Hetman M, Moreira H, Barg E. The best tool for the assessment of developmental disorders in children with down syndrome: comparison of standard and specialized growth charts - cross sectional study. Front Endocrinol (Lausanne) 2022; 13:928151. [PMID: 35992151 PMCID: PMC9389308 DOI: 10.3389/fendo.2022.928151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Accepted: 07/06/2022] [Indexed: 11/13/2022] Open
Abstract
Down Syndrome (DS) is a chromosomal abnormality associated with a spectrum of cognitive and physical disabilities. Children with DS are exposed to both lower and excess body weight and follow distinct growth-curve patterns that deviate significantly from those of children without chromosomal defects. Anthropometric parameters are assessed in the pediatric population with the use of growth charts. The study is based on data from 411 children and adults with DS from Poland. Detailed information concerning children and online survey results were also analyzed. Centiles and standard deviation scores (SDS) of obtained anthropometric parameters were aligned with the data using the LMS method. The study aims to identify which type of growth chart (standard vs specialized) is a leading tool for earlier detection of developmental disorders in DS. The results obtained in the two types of growth charts differed. The advantage of the specialized growth charts over the standard ones cannot be unequivocally determined. Only the combination of both tools allows to detect the development disorders early in the broadest possible way.
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Su Q, Sun X, Zhu L, Yan Q, Zheng P, Mao Y, Ye D. Breastfeeding and the risk of childhood cancer: a systematic review and dose-response meta-analysis. BMC Med 2021; 19:90. [PMID: 33845843 PMCID: PMC8042913 DOI: 10.1186/s12916-021-01950-5] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Accepted: 02/24/2021] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND The aim of this study was to quantitatively summarize the available evidence on the association of breastfeeding with the risk of childhood cancer. METHODS A literature search of PubMed and Embase databases was performed to identify eligible observational studies published from inception to July 17, 2020. The categorical and dose-response meta-analysis was conducted by pooling relative risk (RR) or odds ratio (OR) estimates with 95% confidence intervals (CIs). Potential sources of heterogeneity were detected by meta-regression and stratification analysis. Sensitivity analysis and publication bias test were also carried out. RESULTS Forty-five articles involving 475,579 individuals were included in the meta-analysis. Among the thirty-three studies on the association between breastfeeding and risk of childhood leukemia, the pooled risk estimates were 0.77 (95% CI, 0.65-0.91) and 0.77 (95% CI 0.63-0.94) for ever versus non/occasional breastfeeding and longest versus shortest breastfeeding duration group, respectively. There was clear indication for non-linear dose-response relationship between breastfeeding duration and the risk of childhood leukemia (P non-linear < 0.001). The most protective effect (OR, 0.66, 95% CI 0.62-0.70) was observed at a breastfeeding duration of 9.6 months. Four studies examined, the association between breastfeeding and risk of childhood neuroblastoma, and significant inverse associations were consistently observed in both the comparisons of ever breastfeeding versus non/occasional breastfeeding (OR = 0.59, 95% CI 0.44-0.81) and longest versus shortest breastfeeding (OR = 0.61, 95% CI 0.44-0.83). However, no associations of breastfeeding with risk of other cancers were found. CONCLUSIONS Our study supports a protective role of breastfeeding on the risk of childhood leukemia, also suggesting a non-linear dose-response relationship. Further studies are warranted to confirm the association between breastfeeding and risk of childhood neuroblastoma.
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Affiliation(s)
- Qing Su
- Department of Epidemiology and Biostatistics, School of Public Health, Zhejiang Chinese Medical University, 548 Binwen Road, Hangzhou, 310053, China
| | - Xiaohui Sun
- Department of Epidemiology and Biostatistics, School of Public Health, Zhejiang Chinese Medical University, 548 Binwen Road, Hangzhou, 310053, China
| | - Liwen Zhu
- Department of Hematology and Oncology, Children's hospital of Nanjing Medical University, Nanjing, 210008, China
| | - Qin Yan
- Department of Epidemiology and Biostatistics, School of Public Health, Zhejiang Chinese Medical University, 548 Binwen Road, Hangzhou, 310053, China
| | - Peiwen Zheng
- Department of Medical Adiministration, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, 310006, China
| | - Yingying Mao
- Department of Epidemiology and Biostatistics, School of Public Health, Zhejiang Chinese Medical University, 548 Binwen Road, Hangzhou, 310053, China.
| | - Ding Ye
- Department of Epidemiology and Biostatistics, School of Public Health, Zhejiang Chinese Medical University, 548 Binwen Road, Hangzhou, 310053, China.
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Núñez-Enríquez JC, Correa-Correa V, Flores-Lujano J, Pérez-Saldivar ML, Jiménez-Hernández E, Martín-Trejo JA, Espinoza-Hernández LE, Medina-Sanson A, Cárdenas-Cardos R, Flores-Villegas LV, Peñaloza-González JG, Torres-Nava JR, Espinosa-Elizondo RM, Amador-Sánchez R, Rivera-Luna R, Dosta-Herrera JJ, Mondragón-García JA, González-Ulibarri JE, Martínez-Silva SI, Espinoza-Anrubio G, Duarte-Rodríguez DA, García-Cortés LR, Gil-Hernández AE, Mejía-Aranguré JM. Extremely Low-Frequency Magnetic Fields and the Risk of Childhood B-Lineage Acute Lymphoblastic Leukemia in a City With High Incidence of Leukemia and Elevated Exposure to ELF Magnetic Fields. Bioelectromagnetics 2020; 41:581-597. [PMID: 32965755 DOI: 10.1002/bem.22295] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Revised: 08/21/2020] [Accepted: 08/31/2020] [Indexed: 01/04/2023]
Abstract
It is important to study the relationship between extremely low-frequency magnetic fields (ELF-MFs) and childhood leukemia, particularly in locations with a high incidence of this neoplasm in children and an elevated exposure to ELF-MF, such as Mexico City. The aim was to investigate the association between ELF-MF exposure and the risk of B-lineage acute lymphoblastic leukemia (B-ALL). A case-control study was conducted in Mexico City during the period from 2010 to 2011. Residential 24-h ELF-MF measurements were obtained for 290 incident B-ALL patients and 407 controls, aged less than 16 years. Controls were frequency-matched by sex, age (±18 months), and health institution. The adjusted odds ratios (aOR) and 95% confidence intervals (CIs) were calculated. ELF-MF exposure at <0.2 μT was used to define the reference group. ELF-MF exposure at ≥0.3 μT was observed in 11.3% of the controls. Different ELF-MF intensity cutoff values were used to define the highest exposure category; the highest exposure category for each cutoff value was associated with an increased risk of B-ALL compared with the corresponding lower exposure categories. The aORs were as follows: ≥0.2 μT = 1.26 (95% CI: 0.84-1.89); ≥0.3 μT = 1.53 (95% CI: 0.95-2.48); ≥0.4 μT = 1.87 (95% CI: 1.04-3.35); ≥0.5 μT = 1.80 (95% CI 0.95-3.44); ≥0.6 μT = 2.32 (95% CI: 1.10-4.93). ELF-MF exposure as a continuous variable (per 0.2 μT intervals) was associated with B-ALL risk (aOR = 1.06; 95% CI: 1.01-1.12). In the present study, the proportion of children exposed to ≥0.3 μT is among the highest reported worldwide. Additionally, an ELF-MF exposure ≥0.4 μT may be associated with the risk of B-ALL. Bioelectromagnetics. © 2020 Bioelectromagnetics Society.
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Affiliation(s)
- Juan C Núñez-Enríquez
- Unidad de Investigación Médica en Epidemiología Clínica, Unidad Médica de Alta Especialidad (UMAE), Hospital de Pediatría, Centro Médico Nacional (CMN) "Siglo XXI," Instituto Mexicano del Seguro Social (IMSS), Mexico City, Mexico
| | - Víctor Correa-Correa
- Servicio de Neurocirugía, Hospital de Especialidades "Dr. Bernardo Sepúlveda Gutiérrez," "CMN Siglo XXI," IMSS, Mexico City, Mexico
| | - Janet Flores-Lujano
- Unidad de Investigación Médica en Epidemiología Clínica, Unidad Médica de Alta Especialidad (UMAE), Hospital de Pediatría, Centro Médico Nacional (CMN) "Siglo XXI," Instituto Mexicano del Seguro Social (IMSS), Mexico City, Mexico
| | - María L Pérez-Saldivar
- Unidad de Investigación Médica en Epidemiología Clínica, Unidad Médica de Alta Especialidad (UMAE), Hospital de Pediatría, Centro Médico Nacional (CMN) "Siglo XXI," Instituto Mexicano del Seguro Social (IMSS), Mexico City, Mexico
| | | | - Jorge A Martín-Trejo
- Servicio de Hematología, UMAE Hospital de Pediatría, CMN "Siglo XXI," IMSS, Mexico City, Mexico
| | - Laura E Espinoza-Hernández
- Servicio de Hematología Pediátrica, Hospital General "Dr. Gaudencio González Garza," CMN "La Raza," IMSS, Mexico City, Mexico
| | - Aurora Medina-Sanson
- Departamento de Hemato-Oncología, Hospital Infantil de México Federico Gómez, Secretaria de Salud (SS), Mexico City, Mexico
| | | | - Luz V Flores-Villegas
- Servicio de Hematología Pediátrica, CMN "20 de Noviembre," Instituto de Seguridad Social al Servicio de los Trabajadores del Estado (ISSSTE), Mexico City, Mexico
| | | | - José R Torres-Nava
- Servicio de Oncología, Hospital Pediátrico "Moctezuma,", Secretaría de Salud de la Ciudad de México (SSCDMX), Mexico City, Mexico
| | | | - Raquel Amador-Sánchez
- Servicio de Hematología Pediátrica, Hospital General Regional (HGR) No. 1 "Dr. Carlos MacGregor Sánchez Navarro," IMSS, Mexico City, Mexico
| | | | - Juan J Dosta-Herrera
- Servicio de Cirugía Pediátrica, Hospital General "Gaudencio González Garza," CMN "La Raza," IMSS, Mexico City, Mexico
| | - Javier A Mondragón-García
- Servicio de Cirugía Pediátrica, HGR No. 1 "Dr. Carlos MacGregor Sánchez Navarro," IMSS, Mexico City, Mexico
| | | | | | - Gilberto Espinoza-Anrubio
- Servicio de Pediatría, Hospital General Zona (HGZ) No. 8 "Dr. Gilberto Flores Izquierdo," IMSS, Mexico City, Mexico
| | - David A Duarte-Rodríguez
- Unidad de Investigación Médica en Epidemiología Clínica, Unidad Médica de Alta Especialidad (UMAE), Hospital de Pediatría, Centro Médico Nacional (CMN) "Siglo XXI," Instituto Mexicano del Seguro Social (IMSS), Mexico City, Mexico
| | | | - Ana E Gil-Hernández
- Unidad de Investigación Médica en Epidemiología Clínica, Unidad Médica de Alta Especialidad (UMAE), Hospital de Pediatría, Centro Médico Nacional (CMN) "Siglo XXI," Instituto Mexicano del Seguro Social (IMSS), Mexico City, Mexico
| | - Juan M Mejía-Aranguré
- Unidad de Investigación Médica en Epidemiología Clínica, Unidad Médica de Alta Especialidad (UMAE), Hospital de Pediatría, Centro Médico Nacional (CMN) "Siglo XXI," Instituto Mexicano del Seguro Social (IMSS), Mexico City, Mexico.,Coordinación de Investigación en Salud, CMN "Siglo XXI," IMSS, Mexico City, Mexico
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Nutritional challenges in children and adolescents with Down syndrome. THE LANCET CHILD & ADOLESCENT HEALTH 2020; 4:455-464. [DOI: 10.1016/s2352-4642(19)30400-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Revised: 11/15/2019] [Accepted: 11/27/2019] [Indexed: 12/14/2022]
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Cartwright A, Boath E. Feeding infants with Down's Syndrome: A qualitative study of mothers' experiences. ACTA ACUST UNITED AC 2018. [DOI: 10.1016/j.jnn.2018.03.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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8
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Hwee J, Tait C, Sung L, Kwong JC, Sutradhar R, Pole JD. A systematic review and meta-analysis of the association between childhood infections and the risk of childhood acute lymphoblastic leukaemia. Br J Cancer 2017; 118:127-137. [PMID: 29065105 PMCID: PMC5765221 DOI: 10.1038/bjc.2017.360] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Revised: 09/19/2017] [Accepted: 09/21/2017] [Indexed: 01/02/2023] Open
Abstract
Background: To determine whether childhood infections were associated with the development of childhood acute lymphoblastic leukaemia (ALL). Methods: We included studies that assessed any infection in childhood prior to the diagnosis of ALL in children aged 0–19 years compared to children without cancer. The primary analysis synthesised any infection against the odds of ALL, and secondary analyses assessed the frequency, severity, timing of infections, and specific infectious agents against the odds of ALL. Subgroup analyses by data source were investigated. Results: In our primary analysis of 12 496 children with ALL and 2 356 288 children without ALL from 38 studies, we found that any infection was not associated with ALL (odds ratio (OR)=1.10, 95% CI: 0.95–1.28). Among studies with laboratory-confirmed infections, the presence of infections increased the odds of ALL by 2.4-fold (OR=2.42, 95% CI: 1.54–3.82). Frequency, severity, and timing of infection were not associated with ALL. Conclusions: The hypothesis put forward by Greaves and others about an infectious aetiology are neither confirmed nor refuted and the overall evidence remains inadequate for good judgement. The qualitative difference in the subgroup effects require further study, and future research will need to address the challenges in measuring infectious exposures.
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Affiliation(s)
- Jeremiah Hwee
- Dalla Lana School of Public Health, University of Toronto, Health Sciences Building, 155 College Street, Toronto, ON, Canada
| | - Christopher Tait
- Dalla Lana School of Public Health, University of Toronto, Health Sciences Building, 155 College Street, Toronto, ON, Canada
| | - Lillian Sung
- Division of Haematology/Oncology, Department of Pediatrics, The Hospital for Sick Children, 555 University Avenue, Toronto, ON, Canada.,Program in Child Health Evaluative Sciences, The Hospital for Sick Children, Peter Gilgan Centre for Research and Learning, 686 Bay Street, Toronto, ON, Canada.,Institute of Health Policy, Management and Evaluation, University of Toronto, Health Sciences Building, 155 College Street, Toronto, ON, Canada
| | - Jeffrey C Kwong
- Dalla Lana School of Public Health, University of Toronto, Health Sciences Building, 155 College Street, Toronto, ON, Canada.,Institute for Clinical Evaluative Sciences, 2075 Bayview Avenue, Toronto, ON, Canada.,Department of Family and Community Medicine, University of Toronto, Toronto, ON Canada.,Public Health Ontario, Toronto, ON, Canada.,Toronto Western Family Health Team, University Health Network, Toronto, ON, Canada
| | - Rinku Sutradhar
- Dalla Lana School of Public Health, University of Toronto, Health Sciences Building, 155 College Street, Toronto, ON, Canada.,Institute for Clinical Evaluative Sciences, 2075 Bayview Avenue, Toronto, ON, Canada
| | - Jason D Pole
- Dalla Lana School of Public Health, University of Toronto, Health Sciences Building, 155 College Street, Toronto, ON, Canada.,Pediatric Oncology Group of Ontario, 480 University Avenue, Suite 1014, Toronto, ON, Canada
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9
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Pérez-Saldivar ML, Fajardo-Gutiérrez A, Sierra-Ramírez JA, Núñez-Villegas N, Pérez-Lorenzana H, Dorantes-Acosta EM, Román-Zepeda PF, Rodríguez-Zepeda MDC, González-Ulivarri JE, López-Santiago N, Martínez-Silva SI, Paredes-Aguilera R, Velázquez-Aviña MM, Flores-Lujano J, Jiménez-Hernández E, Núñez-Enríquez JC, Bekker-Méndez VC, Mejía-Aranguré JM. Parental Exposure to Workplace Carcinogens and the Risk of Development of Acute Leukemia in Infants. Case-Control Study. Arch Med Res 2017; 47:684-693. [PMID: 28476196 DOI: 10.1016/j.arcmed.2016.12.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Accepted: 11/23/2016] [Indexed: 11/16/2022]
Abstract
BACKGROUND AND AIMS Occupational exposure of parents to carcinogens is of great interest in the etiology of leukemias. Evidence of the impact of such exposure on infants or small children is scarce. Here we estimated whether occupational exposure of parents to carcinogens could be a risk factor for leukemias in their children. METHODS Cases of acute leukemia (AL) in infants ≤24 months old diagnosed in Mexico City (1998-2013) were included in a population-based, case-control study. Each of the 195 cases was matched with at least one healthy child (n = 369). For each of four exposure windows studied, the degree of exposure to carcinogens was determined for both parents by using a validated occupational exposure index. An unconditional logistic regression was carried out. RESULTS Odds ratios (OR) and the 95% confidence intervals (CI) of the overall occupational exposure for parents during the four exposure windows indicated no association with risk of AL in their children. Pre-conception, the OR by the father 0.77 (0.49-1.21), by the mother 1.03 (0.50-2.11); during pregnancy, father 0.66 (0.38-1.15), mother 1.79 (0.46-6.90); during breastfeeding, father 0.75 (0.43-1.30), mother 0.96 (0.21-4.30); and after birth, father 0.74 (0.45-1.22), mother 0.90 (0.24-3.32). The statistical power of the sample size to identify an OR ≥2 and an exposure of ≥10% among controls was 78%. CONCLUSIONS These data support the idea that parents' occupational exposure during any of the periods studied was not a risk factor contributing to the etiology of AL in infants ≤24 months of age.
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Affiliation(s)
- María Luisa Pérez-Saldivar
- Unidad de Investigación Médica en Epidemiología Clínica, Unidad Médica de Alta Especialidad (UMAE) Hospital de Pediatría, Centro Médico Nacional (CMN) "Siglo XXI", Instituto Mexicano del Seguro Social (IMSS); Sección de Estudios de Posgrado, Escuela Superior de Medicina, Instituto Politécnico Nacional.
| | - Arturo Fajardo-Gutiérrez
- Unidad de Investigación Médica en Epidemiología Clínica, Unidad Médica de Alta Especialidad (UMAE) Hospital de Pediatría, Centro Médico Nacional (CMN) "Siglo XXI", Instituto Mexicano del Seguro Social (IMSS)
| | | | - Nancy Núñez-Villegas
- Servicio de Hematología Pediátrica, Hospital General "Gaudencio González Garza", CMN "La Raza", IMSS
| | - Héctor Pérez-Lorenzana
- Servicio de Cirugía Pediátrica, Hospital General "Gaudencio González Garza", CMN "La Raza", IMSS
| | | | - Pedro Francisco Román-Zepeda
- Servicio de Hematología Pediátrica, Hospital General Regional (HGR) No. 1 "Dr. Carlos Mac Gregor Sánchez Navarro" IMSS
| | | | | | | | | | | | | | - Janet Flores-Lujano
- Unidad de Investigación Médica en Epidemiología Clínica, Unidad Médica de Alta Especialidad (UMAE) Hospital de Pediatría, Centro Médico Nacional (CMN) "Siglo XXI", Instituto Mexicano del Seguro Social (IMSS)
| | - Elva Jiménez-Hernández
- Servicio de Hematología Pediátrica, Hospital General "Gaudencio González Garza", CMN "La Raza", IMSS
| | - Juan Carlos Núñez-Enríquez
- Unidad de Investigación Médica en Epidemiología Clínica, Unidad Médica de Alta Especialidad (UMAE) Hospital de Pediatría, Centro Médico Nacional (CMN) "Siglo XXI", Instituto Mexicano del Seguro Social (IMSS)
| | - Vilma Carolina Bekker-Méndez
- Unidad de Investigación Médica en Inmunología e Infectología, Hospital de Infectología "Dr. Daniel Méndez Hernández", CMN "La Raza", IMSS
| | - Juan Manuel Mejía-Aranguré
- Unidad de Investigación Médica en Epidemiología Clínica, Unidad Médica de Alta Especialidad (UMAE) Hospital de Pediatría, Centro Médico Nacional (CMN) "Siglo XXI", Instituto Mexicano del Seguro Social (IMSS); Laboratorio de Biología Molecular, UMAE, Hospital de Pediatría, CMN "Siglo XXI", IMSS; Coordinación de Investigación en Salud, CMN "Siglo XXI", IMSS.
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10
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Evaluation of maternal health and labor and delivery conditions as risk factors for childhood leukemias in children with Down syndrome. Cancer Epidemiol 2016; 46:36-41. [PMID: 28012443 DOI: 10.1016/j.canep.2016.12.003] [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: 07/26/2016] [Revised: 11/28/2016] [Accepted: 12/02/2016] [Indexed: 11/21/2022]
Abstract
Children with Down syndrome (DS) have a remarkably high risk of developing leukemia during childhood; the mechanisms driving that risk are not well understood, and no clear prevention strategies exist. We conducted a nested case-control study in a Texas DS birth cohort to investigate possible links between maternal health, labor/delivery conditions, and leukemia risk. For most of the factors studied there was no evidence of an increased risk of total leukemias, or the subtypes acute lymphoid or acute myeloid leukemia. Ultrasound use showed an almost 2-fold increased odds of leukemia, but this result is likely an example of confounding by indication. There was a pattern of increased risk seen for presence of co-occurring heart anomalies, including tetralogy of Fallot, ventricular septal defects, atrial septal defects, and patent ductus arteriosus. Further investigation of the links between co-occurring heart defects in children with DS and development of leukemia may provide new understanding of cancer mechanisms, and ultimately lead to prevention opportunities for this high-risk population.
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11
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Francescon J, Haile ZT, Kling D, Chertok I. Association Between WIC Enrollment and Exclusive Breastfeeding at 3 Months Postpartum Among Low-Income Mothers. J Osteopath Med 2016; 116:770-779. [DOI: 10.7556/jaoa.2016.152] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Abstract
Context: Existing literature suggests participation in the Special Supplemental Nutrition Program for Women, Infants, and Children (WIC) in the prenatal and postnatal periods is associated with lower rates of breastfeeding among WIC-eligible mothers. However, minimal research has been published on the association between WIC enrollment and exclusive breastfeeding.
Objective: To examine the association between WIC exposure and exclusive breastfeeding at 3 months postpartum.
Methods: We conducted a secondary data analysis using information on 784 low-income women who participated in the longitudinal population-based Infant Feeding Practices Study II between May 2005 and June 2007. The main outcome of interest was exclusive breastfeeding at 3 months postpartum. Logistic regression analysis was used to estimate OR and 95% CI for exclusive breastfeeding relative to WIC enrollment status, controlling for the confounding effects of other maternal characteristics. We further conducted a subgroup analysis among those participating in WIC prenatally to examine the association between receipt of information about infant feeding from WIC and exclusive breastfeeding at 3 months postpartum.
Results: The crude prevalence of exclusive breastfeeding at 3 months postpartum was 18.1% of women enrolled in WIC and 41.1% of WIC-eligible nonparticipants (P<.0001). After adjusting for sociodemographic, behavioral, and anthropometric factors, the odds of exclusive breastfeeding at 3 months were lower for women enrolled in WIC (OR, 0.57; 95% CI, 0.37-0.88) when compared with women not enrolled in WIC. In the subgroup analysis, receipt of information from WIC about feeding infants during the prenatal period was not significantly associated with exclusive breastfeeding at 3 months (OR, 0.86; 95% CI, 0.39-1.89).
Conclusion: Women who were enrolled in WIC and who received information about feeding infants were less likely to exclusively breastfeed than women not in WIC. Continued improvement and adjustment to the existing WIC breastfeeding program could potentially improve these rates. Additional studies that examine the quality of WIC services provided, especially those pertaining to breastfeeding programs, are warranted.
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12
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Martín-Trejo JA, Núñez-Enríquez JC, Fajardo-Gutiérrez A, Medina-Sansón A, Flores-Lujano J, Jiménez-Hernández E, Amador-Sanchez R, Peñaloza-Gonzalez JG, Alvarez-Rodriguez FJ, Bolea-Murga V, Espinosa-Elizondo RM, de Diego Flores-Chapa J, Pérez-Saldivar ML, Rodriguez-Zepeda MDC, Dorantes-Acosta EM, Núñez-Villegas NN, Velazquez-Aviña MM, Torres-Nava JR, Reyes-Zepeda NC, González-Bonilla CR, Flores-Villegas LV, Rangel-López A, Rivera-Luna R, Paredes-Aguilera R, Cárdenas-Cardós R, Martínez-Avalos A, Gil-Hernández AE, Duarte-Rodríguez DA, Mejía-Aranguré JM. Early mortality in children with acute lymphoblastic leukemia in a developing country: the role of malnutrition at diagnosis. A multicenter cohort MIGICCL study. Leuk Lymphoma 2016; 58:898-908. [DOI: 10.1080/10428194.2016.1219904] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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13
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Mejía-Aranguré JM. Molecular epidemiology of acute leukemia in children: causal model, interaction of three factors-susceptibility, environmental exposure and vulnerability period. BOLETIN MEDICO DEL HOSPITAL INFANTIL DE MEXICO 2016; 73:55-63. [PMID: 29421234 DOI: 10.1016/j.bmhimx.2015.12.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Accepted: 12/03/2015] [Indexed: 01/07/2023] Open
Abstract
Acute leukemias have a huge morphological, cytogenetic and molecular heterogeneity and genetic polymorphisms associated with susceptibility. Every leukemia presents causal factors associated with the development of the disease. Particularly, when three factors are present, they result in the development of acute leukemia. These phenomena are susceptibility, environmental exposure and a period that, for this model, has been called the period of vulnerability. This framework shows how the concepts of molecular epidemiology have established a reference from which it is more feasible to identify the environmental factors associated with the development of leukemia in children. Subsequently, the arguments show that only susceptible children are likely to develop leukemia once exposed to an environmental factor. For additional exposure, if the child is not susceptible to leukemia, the disease does not develop. In addition, this exposure should occur during a time window when hematopoietic cells and their environment are more vulnerable to such interaction, causing the development of leukemia. This model seeks to predict the time when the leukemia develops and attempts to give a context in which the causality of childhood leukemia should be studied. This information can influence and reduce the risk of a child developing leukemia.
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Affiliation(s)
- Juan Manuel Mejía-Aranguré
- Unidad de Investigación en Epidemiología Clínica, Unidad Médica de Alta Especialidad, Hospital de Pediatría, Centro Médico Nacional Siglo XXI and Coordinación de Investigación en Salud, Instituto Mexicano del Seguro Social, Ciudad de México, México.
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14
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Mezei G, Sudan M, Izraeli S, Kheifets L. Epidemiology of childhood leukemia in the presence and absence of Down syndrome. Cancer Epidemiol 2014; 38:479-89. [DOI: 10.1016/j.canep.2014.07.006] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2014] [Revised: 07/10/2014] [Accepted: 07/11/2014] [Indexed: 02/05/2023]
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15
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EBV, HCMV, HHV6, and HHV7 screening in bone marrow samples from children with acute lymphoblastic leukemia. BIOMED RESEARCH INTERNATIONAL 2014; 2014:548097. [PMID: 25309913 PMCID: PMC4189769 DOI: 10.1155/2014/548097] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Revised: 08/26/2014] [Accepted: 08/26/2014] [Indexed: 12/25/2022]
Abstract
Acute lymphoblastic leukemia (ALL) is the most common cancer in childhood worldwide and Mexico has reported one of the highest incidence rates. An infectious etiology has been suggested and supported by epidemiological evidences; however, the identity of the involved agent(s) is not known. We considered that early transmitted lymphotropic herpes viruses were good candidates, since transforming mechanisms have been described for them and some are already associated with human cancers. In this study we interrogated the direct role of EBV, HCMV, HHV6, and HHV7 human herpes viruses in childhood ALL. Viral genomes were screened in 70 bone marrow samples from ALL patients through standard and a more sensitive nested PCR. Positive samples were detected only by nested PCR indicating a low level of infection. Our result argues that viral genomes were not present in all leukemic cells, and, hence, infection most likely was not part of the initial genetic lesions leading to ALL. The high statistical power of the study suggested that these agents are not involved in the genesis of ALL in Mexican children. Additional analysis showed that detected infections or coinfections were not associated with prognosis.
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16
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Xavier AC, Ge Y, Taub J. Unique clinical and biological features of leukemia in Down syndrome children. Expert Rev Hematol 2014; 3:175-86. [DOI: 10.1586/ehm.10.14] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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17
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Do longer formula feeding and later introduction of solids increase risk for pediatric acute lymphoblastic leukemia? Cancer Causes Control 2013; 25:73-80. [DOI: 10.1007/s10552-013-0309-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2013] [Accepted: 10/11/2013] [Indexed: 10/26/2022]
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18
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Morales-Sánchez A, Bernáldez-Ríos R, Alvarez-Rodríguez FJ, Bekker-Méndez VC, Fajardo-Gutiérrez A, de Diego Flores-Chapa J, Flores-Lujano J, Jiménez-Hernández E, Peñaloza-González JG, Del Carmen Rodríguez-Zepeda M, Torres-Nava JR, Velázquez-Aviña MM, Amador-Sánchez R, Alvarado-Ibarra M, Reyes-Zepeda N, Espinosa-Elizondo RM, Fuentes-Pananá EM, Mejía-Aranguré JM. Lack of evidence for human T-lymphotropic virus type 1 and mouse mammary tumor-like virus involvement in the genesis of childhood acute lymphoblastic leukemia. Cancer Epidemiol Biomarkers Prev 2013; 22:2130-3. [PMID: 24019395 DOI: 10.1158/1055-9965.epi-13-0539] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND In Mexico City, the incidence of childhood acute lymphoblastic leukemia (ALL) is one of the highest in the world; epidemiologic evidence suggests that infectious agents could be involved in the genesis of this disease. Early transmitted oncogenic retroviruses infecting lymphocytes are important candidates. METHODS PCR-based assays were used to screen viral genomic sequences of human T-cell lymphotrophic virus, type 1 (HTLV1) and mouse mammary tumor virus (MMTV)-like virus (MMTV-LV) in leukemic cells from 67 pediatric patients with ALL. RESULTS Viral genomic sequences were not detected in any sample by neither standard nor nested PCR. CONCLUSIONS Because of the methodologic strictness and high statistical power of the study, these results suggest that HTLV1 and MMTV-LV are not involved in the genesis of childhood ALL in Mexican children. IMPACT To our knowledge, this is the first work exploring the direct participation of HTLV1 and MMTV-LV retroviruses in childhood ALL development.
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Affiliation(s)
- Abigail Morales-Sánchez
- Authors' Affiliations: Units of Medical Research in Clinical Epidemiology and Infectious and Parasitic Diseases, Pediatric Hospital, National Medical Center XXI Century, Mexican Institute of Social Security; Medicine Faculty, National Autonomous University of Mexico; and Mexican Inter-institutional Group for the Identification of the Causes of Childhood Leukaemia (MIGICCL), Mexico City, Mexico
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19
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Núñez-Enríquez JC, Fajardo-Gutiérrez A, Buchán-Durán EP, Bernáldez-Ríos R, Medina-Sansón A, Jiménez-Hernández E, Amador-Sanchez R, Peñaloza-Gonzalez JG, Paredes-Aguilera R, Alvarez-Rodriguez FJ, Bolea-Murga V, de Diego Flores-Chapa J, Flores-Lujano J, Bekker-Mendez VC, Rivera-Luna R, Del Carmen Rodriguez-Zepeda M, Rangel-López A, Dorantes-Acosta EM, Núñez-Villegas N, Velazquez-Aviña MM, Torres-Nava JR, Reyes-Zepeda NC, Cárdenas-Cardos R, Flores-Villegas LV, Martinez-Avalos A, Salamanca-Gómez F, Gorodezky C, Arellano-Galindo J, Mejía-Aranguré JM. Allergy and acute leukaemia in children with Down syndrome: a population study. Report from the Mexican inter-institutional group for the identification of the causes of childhood leukaemia. Br J Cancer 2013; 108:2334-8. [PMID: 23695017 PMCID: PMC3681010 DOI: 10.1038/bjc.2013.237] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2013] [Revised: 04/17/2013] [Accepted: 04/22/2013] [Indexed: 01/31/2023] Open
Abstract
BACKGROUND Allergies have been described as protective factors against the development of childhood acute leukaemia (AL). Our objective was to investigate the associations between allergy history and the development of AL and acute lymphoblastic leukaemia (ALL) in children with Down syndrome (DS). METHODS A case-control study was performed in Mexico City. The cases (n=97) were diagnosed at nine public hospitals, and the controls (n=222) were recruited at institutions for children with DS. Odds ratios (OR) were calculated. RESULTS Asthma was positively associated with AL development (OR=4.18; 95% confidence interval (CI): 1.47-11.87), whereas skin allergies were negatively associated (OR=0.42; 95% CI: 0.20-0.91). CONCLUSION Our findings suggest that allergies and AL in children with DS share biological and immune mechanisms. To our knowledge, this is the first study reporting associations between allergies and AL in children with DS.
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Affiliation(s)
- J C Núñez-Enríquez
- Unidad de Investigación Médica en Epidemiologia Clínica, Hospital de Pediatría, Centro Médico Nacional (CMN) Siglo XXI, Instituto Mexicano del Seguro Social, Avenida Cuauhtémoc 330, Delegación Cuauhtémoc, México D.F. 06720, México.
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20
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Jensen E. Participation in the Supplemental Nutrition Program for Women, Infants and Children (WIC) and breastfeeding: national, regional, and state level analyses. Matern Child Health J 2012; 16:624-31. [PMID: 21505775 DOI: 10.1007/s10995-011-0796-7] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
This research builds on literature that suggests a negative association between participation in the Supplemental Nutrition Program for Women, Infants, and Children (WIC) and breastfeeding. Variation in results at the national, regional, and state level has important policy implications for breastfeeding promotion through WIC. Using the 2007 National Immunization Survey dataset, Chi-square, ANOVA, and adjusted regression modeling techniques assess the relationship between WIC participation and breastfeeding initiation and duration. Adjusted regression models suggest a negative association between WIC participation and breastfeeding initiation rates (OR = 0.67, 95% CI: 0.61, 0.72). Of those who initiated breastfeeding, WIC participation was associated with a mean breastfeeding duration decrease of 0.63 months (95% CI: -0.86, -0.39). At the regional level, 3 of 7 regions showed a negative association between WIC participation and breastfeeding initiation. All of the regions indicated a negative association between WIC participation and breastfeeding duration. Out of 50 states, 13 had a statistically significant reduction in odds of initiation of breastfeeding and 10 had reduced duration of breastfeeding among participants of WIC when compared to non-participants. No state showed a positive association between WIC participation and breastfeeding. Regional and state differences in breastfeeding rates suggest that further research is needed to understand the role of national, regional, and state level policies which may undermine WIC's breastfeeding promotion efforts. Although WIC revised the food packages to create a stronger incentive for breastfeeding, a disincentive for breastfeeding may exist given the higher market value of the formula packages.
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Affiliation(s)
- Elizabeth Jensen
- Department of Maternal and Child Health, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
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Sooben RD. Breastfeeding patterns in infants with Down's syndrome: A literature review. ACTA ACUST UNITED AC 2012. [DOI: 10.12968/bjom.2012.20.3.187] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Roja D. Sooben
- Roja D. Sooben Senior Lecturer in Learning Disability Nursing, School of Nursing, Midwifery and Social Work, University of Hertfordshire
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Pérez-Saldivar ML, Fajardo-Gutiérrez A, Bernáldez-Ríos R, Martínez-Avalos A, Medina-Sanson A, Espinosa-Hernández L, Flores-Chapa JDD, Amador-Sánchez R, Peñaloza-González JG, Alvarez-Rodríguez FJ, Bolea-Murga V, Flores-Lujano J, Rodríguez-Zepeda MDC, Rivera-Luna R, Dorantes-Acosta EM, Jiménez-Hernández E, Alvarado-Ibarra M, Velázquez-Aviña MM, Torres-Nava JR, Duarte-Rodríguez DA, Paredes-Aguilera R, Del Campo-Martínez MDLÁ, Cárdenas-Cardos R, Alamilla-Galicia PH, Bekker-Méndez VC, Ortega-Alvarez MC, Mejia-Arangure JM. Childhood acute leukemias are frequent in Mexico City: descriptive epidemiology. BMC Cancer 2011; 11:355. [PMID: 21846410 PMCID: PMC3171387 DOI: 10.1186/1471-2407-11-355] [Citation(s) in RCA: 106] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2011] [Accepted: 08/17/2011] [Indexed: 11/15/2022] Open
Abstract
Background Worldwide, acute leukemia is the most common type of childhood cancer. It is particularly common in the Hispanic populations residing in the United States, Costa Rica, and Mexico City. The objective of this study was to determine the incidence of acute leukemia in children who were diagnosed and treated in public hospitals in Mexico City. Methods Included in this study were those children, under 15 years of age and residents of Mexico City, who were diagnosed in 2006 and 2007 with leukemia, as determined by using the International Classification of Childhood Cancer. The average annual incidence rates (AAIR), and the standardized average annual incidence rates (SAAIR) per million children were calculated. We calculated crude, age- and sex-specific incidence rates and adjusted for age by the direct method with the world population as standard. We determined if there were a correlation between the incidence of acute leukemias in the various boroughs of Mexico City and either the number of agricultural hectares, the average number of persons per household, or the municipal human development index for Mexico (used as a reference of socio-economic level). Results Although a total of 610 new cases of leukemia were registered during 2006-2007, only 228 fit the criteria for inclusion in this study. The overall SAAIR was 57.6 per million children (95% CI, 46.9-68.3); acute lymphoblastic leukemia (ALL) was the most frequent type of leukemia, constituting 85.1% of the cases (SAAIR: 49.5 per million), followed by acute myeloblastic leukemia at 12.3% (SAAIR: 6.9 per million), and chronic myeloid leukemia at 1.7% (SAAIR: 0.9 per million). The 1-4 years age group had the highest SAAIR for ALL (77.7 per million). For cases of ALL, 73.2% had precursor B-cell immunophenotype (SAAIR: 35.8 per million) and 12.4% had T-cell immunophenotype (SAAIR 6.3 per million). The peak ages for ALL were 2-6 years and 8-10 years. More than half the children (58.8%) were classified as high risk. There was a positive correlation between the average number of persons per household and the incidence of the pre-B immunophenotype (Pearson's r, 0.789; P = 0.02). Conclusions The frequency of ALL in Mexico City is among the highest in the world, similar to those found for Hispanics in the United States and in Costa Rica.
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Affiliation(s)
- María Luisa Pérez-Saldivar
- Unidad de Investigación en Epidemiología Clínica, Unidad Médica de Alta Especialidad UMAE Hospital de Pediatría, Centro Médico Nacional Siglo XXI, Instituto Mexicano de Seguridad Social, México DF, México
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Kulka TR, Jensen E, McLaurin S, Woods E, Kotch J, Labbok M, Bowling M, Dardess P, Baker S. Community based participatory research of breastfeeding disparities in African American women. ACTA ACUST UNITED AC 2011; 3:233-239. [PMID: 23326622 DOI: 10.1177/1941406411413918] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
OBJECTIVE: Lack of support for breastfeeding mothers has been consistently identified in the literature as a barrier for breastfeeding across racial and ethnic groups. Using a community-based participatory approach, academic and community-based partners conducted an iterative process to assess barriers, facilitators and potential mediating interventions for breastfeeding in the African-American community in Durham, North Carolina. METHODS: Eight focus groups were conducted with African-American mothers, fathers and grandmothers. Researchers transcribed and coded each focus group and analyzed using Atlas ti. 5.2. Patterns and themes that emerged informed the development of community stakeholder interviews; 41 interviews were conducted with community representatives. These findings informed the development of a support group pilot intervention. The pilot support groups were evaluated for increase in knowledge of attendees. RESULTS: Focus group and community interviews indicate that African Americans may disproportionately experience inadequate support for breastfeeding. This lack of support was reported in the home, the workplace, among peers, and from healthcare providers. The pilot support groups resulted in increased knowledge of breastfeeding among group participants OR=3.6 (95% CI: 2.5, 5.2). CONCLUSIONS: The findings from this research underscore the importance of a multi-level approach to breastfeeding support for African American women to address breastfeeding disparities.
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Affiliation(s)
- Tamar Ringel Kulka
- Department of Maternal and Child Health, Gillings School of Global Public Health, University of North Carolina at Chapel Hill
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