Linked Life Data

8687997

Source:http://linkedlifedata.com/resource/pubmed/id/8687997

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1996-11-1
pubmed:abstractText
Farm workers generally are exposed to a combination of synthetic agricultural chemicals and natural products while working in the fields. These biologically active compounds control infestation of tobacco by insects, and plant growth. We have investigated, in vitro, the effects of acephate (AP), cadmium (Cd), methamidophos (MAP), maleic hydrazide (MH), and nicotine (NI) on the activities of the erythrocyte enzymes delta-aminolevulinic acid dehydratase (ALAD), superoxide dismutase (SOD), and plasma cholinesterase (CHE). ALAD, SOD, and plasma CHE were assayed, using aminolevulinic acid, pyrogallol, or butyryl thiocholine as substrates, respectively. Different concentrations of the above chemicals were used to obtain minimum and maximum inhibition of the enzymes, and for the development of inhibition dose response curves. These curves were used to determine the concentration of each chemical required to inhibit 50% of enzyme activity (I50). The I50 concentrations of various chemicals for each enzyme were determined in mM for ALAD: AP=95.5, Cd=1.4x10(-3), MH=2.8, MAP=7.1, NI=60.8; for SOD: AP=1.2, Cd=0.8x10(-7), MH=0.04, MAP=0.42, NI=0.81; for CHE: AP=5.6, Cd=18. 8x10(-5), MAP=18.4x10(-4); CHE was not inhibited by MH and NI. Our data indicate that AP inhibited both SOD and CHE to a maximum of 91 and 87%, while MH inhibited both SOD and ALAD to a maximum 78 and 90%. However, SOD was the enzyme that was most sensitive to all the agricultural-chemicals tested in this study. The inhibition of these enzymes will enable the development of a sensitive biomarker and the assessment of long term health risks in farm workers.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jul
pubmed:issn
0090-4341
pubmed:author
pubmed:issnType
Print
pubmed:volume
31
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
107-14
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1996
pubmed:articleTitle
Comparative inhibition of enzymes of human erythrocytes and plasma in vitro by agricultural chemicals.
pubmed:affiliation
Environmental Health Program, Atwood Research Building, Kentucky State University, Frankfort, Kentucky 40601, USA.
pubmed:publicationType
Journal Article, Comparative Study, Research Support, U.S. Gov't, Non-P.H.S.