Abstract
INTRODUCTION: Intravenous (IV) fluid bags made of polyvinyl chloride (PVC) often contain the plasticizer di(2-ethylhexyl) phthalate (DEHP) to make the PVC flexible. Phthalate esters have been reported to inhibit neuronal nicotinic acetylcholine receptors, which are sensitive to many inhaled anesthetics. This raises the possibility that DEHP might modulate the function of other cys-loop receptors, such as γ-amino butyric acid type A (GABAA) and glycine receptors, and that DEHP-plasticized PVC might interfere with electrophysiologic studies of anesthetic mechanisms on those receptors. METHODS: α1β2 GABAA and α1 glycine receptors were expressed in Xenopus laevis oocytes and studied using two-electrode voltage clamping. We then measured the effect of buffers from IV bags containing DEHP-plasticized PVC, and of buffers saturated with DEHP, on agonist-induced currents. RESULTS: Agonist-induced currents from glycine receptors were enhanced by buffers from IV bags containing DEHP-plasticized PVC by 291.9% ± 84.5% (mean ± se) and from saturated solutions of DEHP by 70.8% ± 16.7%. Agonist-induced currents from α1β2 GABAA receptors were inhibited by buffers from IV bags containing DEHP-plasticized PVC by 19.3% ± 3.2% and by 31.7% ± 7.0% from buffers saturated with DEHP. CONCLUSIONS: The plasticizer DEHP modulates the function of both GABAA and glycine receptors. DEHP contamination can confound the results of electrophysiologic studies of anesthetic mechanisms on these receptors if DEHP-plasticized PVC is present in the experimental apparatus.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 393-396 |
| Number of pages | 4 |
| Journal | Anesthesia and Analgesia |
| Volume | 105 |
| Issue number | 2 |
| DOIs | |
| State | Published - Aug 2007 |
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ASJC Scopus subject areas
- Anesthesiology and Pain Medicine
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The plasticizer di(2-ethylhexyl) phthalate modulates γ-aminobutyric acid type A and glycine receptor function. / Yang, Liya; Milutinovic, Pavle S.; Brosnan, Robert J; Eger, Edmond I.; Sonner, James M.
In: Anesthesia and Analgesia, Vol. 105, No. 2, 08.2007, p. 393-396.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - The plasticizer di(2-ethylhexyl) phthalate modulates γ-aminobutyric acid type A and glycine receptor function
AU - Yang, Liya
AU - Milutinovic, Pavle S.
AU - Brosnan, Robert J
AU - Eger, Edmond I.
AU - Sonner, James M.
PY - 2007/8
Y1 - 2007/8
N2 - INTRODUCTION: Intravenous (IV) fluid bags made of polyvinyl chloride (PVC) often contain the plasticizer di(2-ethylhexyl) phthalate (DEHP) to make the PVC flexible. Phthalate esters have been reported to inhibit neuronal nicotinic acetylcholine receptors, which are sensitive to many inhaled anesthetics. This raises the possibility that DEHP might modulate the function of other cys-loop receptors, such as γ-amino butyric acid type A (GABAA) and glycine receptors, and that DEHP-plasticized PVC might interfere with electrophysiologic studies of anesthetic mechanisms on those receptors. METHODS: α1β2 GABAA and α1 glycine receptors were expressed in Xenopus laevis oocytes and studied using two-electrode voltage clamping. We then measured the effect of buffers from IV bags containing DEHP-plasticized PVC, and of buffers saturated with DEHP, on agonist-induced currents. RESULTS: Agonist-induced currents from glycine receptors were enhanced by buffers from IV bags containing DEHP-plasticized PVC by 291.9% ± 84.5% (mean ± se) and from saturated solutions of DEHP by 70.8% ± 16.7%. Agonist-induced currents from α1β2 GABAA receptors were inhibited by buffers from IV bags containing DEHP-plasticized PVC by 19.3% ± 3.2% and by 31.7% ± 7.0% from buffers saturated with DEHP. CONCLUSIONS: The plasticizer DEHP modulates the function of both GABAA and glycine receptors. DEHP contamination can confound the results of electrophysiologic studies of anesthetic mechanisms on these receptors if DEHP-plasticized PVC is present in the experimental apparatus.
AB - INTRODUCTION: Intravenous (IV) fluid bags made of polyvinyl chloride (PVC) often contain the plasticizer di(2-ethylhexyl) phthalate (DEHP) to make the PVC flexible. Phthalate esters have been reported to inhibit neuronal nicotinic acetylcholine receptors, which are sensitive to many inhaled anesthetics. This raises the possibility that DEHP might modulate the function of other cys-loop receptors, such as γ-amino butyric acid type A (GABAA) and glycine receptors, and that DEHP-plasticized PVC might interfere with electrophysiologic studies of anesthetic mechanisms on those receptors. METHODS: α1β2 GABAA and α1 glycine receptors were expressed in Xenopus laevis oocytes and studied using two-electrode voltage clamping. We then measured the effect of buffers from IV bags containing DEHP-plasticized PVC, and of buffers saturated with DEHP, on agonist-induced currents. RESULTS: Agonist-induced currents from glycine receptors were enhanced by buffers from IV bags containing DEHP-plasticized PVC by 291.9% ± 84.5% (mean ± se) and from saturated solutions of DEHP by 70.8% ± 16.7%. Agonist-induced currents from α1β2 GABAA receptors were inhibited by buffers from IV bags containing DEHP-plasticized PVC by 19.3% ± 3.2% and by 31.7% ± 7.0% from buffers saturated with DEHP. CONCLUSIONS: The plasticizer DEHP modulates the function of both GABAA and glycine receptors. DEHP contamination can confound the results of electrophysiologic studies of anesthetic mechanisms on these receptors if DEHP-plasticized PVC is present in the experimental apparatus.
UR - http://www.scopus.com/inward/record.url?scp=34547574253&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=34547574253&partnerID=8YFLogxK
U2 - 10.1213/01.ane.0000267336.37735.d7
DO - 10.1213/01.ane.0000267336.37735.d7
M3 - Article
C2 - 17646496
AN - SCOPUS:34547574253
VL - 105
SP - 393
EP - 396
JO - Anesthesia and Analgesia
JF - Anesthesia and Analgesia
SN - 0003-2999
IS - 2
ER -