Preliminary study on the potential utility of GFP as a biosensor for drug stability in parenteral solutions.
In the health care setting, drugs added to large volume parenteral solutions (LVPS) are routinely administered to improve therapeutic effects and provide a faster clinical response. The development of analytical techniques that permit the detection of incompatibilities between drugs and parenteral solutions is necessary to guarantee their correct association with minimum adverse effects. Green fluorescent protein (GFP) has been used as a biological indicator of sterilization and disinfection processes because it exhibits a high thermal stability and is easily detected using UV light and spectrofluorometry. The response of GFP structure and/or protonation state to physicochemical changes in the solution favors its potential use as a biosensor for drug stability in parenteral solutions. The stability of the diuretic drugs furosemide and aminophylline, individually or combined, added to parenteral solutions of 20% mannitol and 0.9% NaCl was monitored by absorbance and RP-HPLC immediately and after 20 h of storage at room temperature, with and without 1 h exposure to a strong oxidant, H2O2. Changes in GFP fluorescence intensity were evaluated under the same conditions for purified GFP added to aliquots of the drug/LVPS solutions. Results show that GFP fluorescence intensity was proportional to the loss in drug stability over time and thus may potentially be added to a lot sample of a drug/parenteral solution as an immediate on-site test for defective product.
dos Santos
Carolina Alves
CA
Department of Biochemical and Pharmaceutical Technology, School of Pharmaceutical Science, University of São Paulo, SP, Brazil. carolinasantos@usp.br
Mazzola
Priscila Gava
PG
Silva
Pedro Henrique Soares
PH
Cholewa
Olivia
O
Penna
Thereza Christina Vessoni
TC
D015374:Biosensing Techniques; D001709:Biotechnology / Q000379:methods*; D004333:Drug Administration Routes; D004344:Drug Incompatibility; D004355:Drug Stability; D004926:Escherichia coli / Q000378:metabolism; D049452:Green Fluorescent Proteins / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D007263:Infusions, Parenteral; D008353:Mannitol / Q000737:chemistry; D013050:Spectrometry, Fluorescence; D013056:Spectrophotometry, Ultraviolet; D013696:Temperature; D014466:Ultraviolet Rays
D049452:Green Fluorescent Proteins; D008353:Mannitol; D006861:Hydrogen Peroxide