Acute leukemia in early childhood
Rev. bras. pesqui. méd. biol
; Braz. j. med. biol. res;40(6): 749-760, June 2007. tab
Article
em En
| LILACS
| ID: lil-452685
Biblioteca responsável:
BR1.1
ABSTRACT
Acute leukemia in early childhood is biologically and clinically distinct. The particular characteristics of this malignancy diagnosed during the first months of life have provided remarkable insights into the etiology of the disease. The pro-B, CD10 negative immunophenotype is typically found in infant acute leukemia, and the most common genetic alterations are the rearrangements of the MLL gene. In addition, the TEL/AML1 fusion gene is most frequently found in children older than 24 months. A molecular study on a Brazilian cohort (age range 0-23 months) has detected TEL/AML1+ve (N = 9), E2A/PBX1+ve (N = 4), PML/RARA+ve (N = 4), and AML1/ETO+ve (N = 2) cases. Undoubtedly, the great majority of genetic events occurring in these patients arise prenatally. The environmental exposure to damaging agents that give rise to genetic changes prenatally may be accurately determined in infants since the window of exposure is limited and known. Several studies have shown maternal exposures that may give rise to leukemogenic changes. The Brazilian Collaborative Study Group of Infant Acute Leukemia has found that mothers exposed to dipyrone, pesticides and hormones had an increased chance to give birth to babies with infant acute leukemia [OR = 1.48 (95 percentCI = 1.05-2.07), OR = 2.27 (95 percentCI = 1.56-3.31) and OR = 9.08 (95 percentCI = 2.95-27.96)], respectively. This review aims to summarize recent clues that have facilitated the elucidation of the biology of early childhood leukemias, with emphasis on infant acute leukemia in the Brazilian population.
Texto completo:
1
Coleções:
01-internacional
Temas:
Geral
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Tipos_de_cancer
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Leucemia
Base de dados:
LILACS
Assunto principal:
Efeitos Tardios da Exposição Pré-Natal
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Leucemia Mieloide
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Regulação Neoplásica da Expressão Gênica
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Proteína de Leucina Linfoide-Mieloide
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Leucemia-Linfoma Linfoblástico de Células Precursoras
Tipo de estudo:
Etiology_studies
Limite:
Female
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Humans
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Infant
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Newborn
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Pregnancy
Idioma:
En
Revista:
Braz J Med Biol Res
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Braz. j. med. biol. res
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Braz. j. med. biol. res. (Online)
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Brazilian journal of medical and biological research
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Brazilian journal of medical and biological research (Impresso)
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Rev. bras. pesqui. méd. biol
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Revista brasileira de pesquisas médicas e biológicas
Assunto da revista:
BIOLOGIA
/
MEDICINA
Ano de publicação:
2007
Tipo de documento:
Article
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Project document
País de afiliação:
Brasil