Document Detail

Lactate dehydrogenase isoform activity mapping in patients with intra-amniotic infection.
MedLine Citation:
PMID:  16875649     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: Five distinct lactate dehydrogenase isoenzymes have been described. We sought to illustrate the specific amniotic fluid lactate dehydrogenase isoenzyme activity profiles in women with intra-amniotic infection.
STUDY DESIGN: Amniotic fluid was retrieved from 82 women who were stratified in the following groups: (1) positive amniotic fluid cultures (n = 23 women; gestational age, 26 weeks [range, 21-32 weeks]); (2) negative amniotic fluid cultures (n = 22 women; gestational age, 30 weeks [range, 16-36 weeks]); (3) second trimester control (normal genetic karyotype; n = 17 women; gestational age, 18 weeks [range, 16-22 weeks]); and (4) third trimester control (fetal lung maturity testing; n = 20 women; gestational age, 36 weeks [range, 31-38 weeks]). The optical density of each isoform was determined relative to a standard with 5 known lactate dehydrogenase isoenzyme activities. Total lactate dehydrogenase activity was measured by the clinical laboratory immediately after retrieval and by a kinetic UV spectrophotometric assay at the time of the isoelectric focusing.
RESULTS: Infection increased total lactate dehydrogenase activity: positive amniotic fluid cultures (median, 762.4 [range, 169.3-3374.8]) vs negative amniotic fluid cultures (median, 203.7 [range, 57.8-1939.3]; U/L; P < .001]). Lactate dehydrogenase isoform profiling identified significant and specific increases in lactate dehydrogenase isoforms 3, 4 (P < .01), and 5 (P < .05) in positive amniotic fluid cultures compared to the negative amniotic fluid cultures group. A selective up-regulation in lactate dehydrogenase isoform 5 was identified at term in healthy subjects.
CONCLUSION: Intra-amniotic infection is characterized by an increase in the activities of lactate dehydrogenase isoforms 3, 4, and 5; advancing gestational age demonstrates an up-regulation of isoform 5 only.
Lissa K Magloire; Catalin S Buhimschi; Christian M Pettker; Anna K Sfakianaki; Benjamin D Hamar; Vineet Bhandari; Irina A Buhimschi
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural     Date:  2006-07-26
Journal Detail:
Title:  American journal of obstetrics and gynecology     Volume:  195     ISSN:  1097-6868     ISO Abbreviation:  Am. J. Obstet. Gynecol.     Publication Date:  2006 Oct 
Date Detail:
Created Date:  2006-09-26     Completed Date:  2006-10-26     Revised Date:  2014-09-17    
Medline Journal Info:
Nlm Unique ID:  0370476     Medline TA:  Am J Obstet Gynecol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1045-52     Citation Subset:  AIM; IM    
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MeSH Terms
Chorioamnionitis / enzymology*
Gestational Age
Isoenzymes / genetics,  metabolism*
L-Lactate Dehydrogenase / metabolism*
Regression Analysis
Grant Support
R01 HD 047321/HD/NICHD NIH HHS; R01 HD047321/HD/NICHD NIH HHS; R01 HD047321-01/HD/NICHD NIH HHS; R01 HD047321-02/HD/NICHD NIH HHS
Reg. No./Substance:
0/Isoenzymes; EC Dehydrogenase

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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