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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Int+J+Environ+Res+Public+Health
2015 ; 12
(7
): 8434-47
Nephropedia Template TP
gab.com Text
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English Wikipedia
Metabolic Polymorphisms and Clinical Findings Related to Benzene Poisoning
Detected in Exposed Brazilian Gas-Station Workers
#MMPMID26197327
Mitri S
; Fonseca AS
; Otero UB
; Tabalipa MM
; Moreira JC
; Sarcinelli Pde N
Int J Environ Res Public Health
2015[Jul]; 12
(7
): 8434-47
PMID26197327
show ga
Benzene is a ubiquitous environmental pollutant and an important industrial
chemical present in both gasoline and motor vehicle emissions. Occupational human
exposure to benzene occurs in the petrochemical and petroleum refining industries
as well as in gas-station workers, where it can lead to benzene poisoning (BP),
but the mechanisms of BP are not completely understood. In Brazil, a significant
number of gas-station service workers are employed. The aim of the present study
was to evaluate alterations related to BP and metabolic polymorphisms in
gas-station service workers exposed to benzene in the city of Rio de Janeiro,
Brazil. Occupational exposure was based on clinical findings related to BP, and
metabolic polymorphisms in 114 Brazilian gas-station attendants. These workers
were divided into No Clinical Findings (NCF) and Clinical Findings (CF) groups.
Neutrophil and Mean Corpuscular Volume (MCV) showed a significant difference
between the two study groups, and neutrophil has the greatest impact on the
alterations suggestive of BP. The clinical findings revealed higher frequencies
of symptoms in the CF group, although not all members presented statistical
significance. The frequencies of alleles related to risk were higher in the CF
group for GSTM1, GSTT1, CYP2E1 7632T > A, but lower for NQO1 and CYP2E1 1053C > T
genotypes. Moreover, an association was found between GSTM1 null and alterations
related to BP, but we did not observe any effects of other polymorphisms.
Variations in benzene metabolizing genes may modify benzene toxicity and should
be taken into consideration during risk assessment evaluations.