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Master Thesis

Essai de stérilité des préparations produites en lot : neutralisation du pouvoir inhibiteur de la croissance bactérienne de certains cytotoxiques par des agents de complexation

Abstract : In the context of batch production of cytotoxic drugs in hospital pharmacies with the need of sterility testing, the objective was to validate the use of Rapid Microbiological Method (RMM), and to develop adequate neutralization method in case of inhibition of bacterial growth. The potential microbiological growth inhibitory effect of 3 anticancer drugs (5 fluorouracil, irinotecan and oxaliplatin) selected for batch production was assessed on BacT/ALERT® system. Among cytotoxic drugs, only 5FU exhibited inhibitory effect on microbiological growth using rapid microbiological method. To counteract this effect our purpose was to use neutralizing agents complexing the drug i.e. activated carbon or ion exchange resins. The microbiological bactericidal concentration of 5FU was very low (1.10-4 mg/mL) indicating the absolute need to neutralize the whole drug before sterility test. The complexation was validated by High Performance Liquid Chromatography control of the residual 5FU concentration in solution after the use of neutralizing agents. Only activated carbon was able to fully capture 5FU when previously diluted at 5 mg/ml. Conversely, the resins, in the condition of the study, were not able to fully capture 5FU whatever the dilution. The microbiological growth on BacT/ALERT® system after active carbon treatment was successfully confirmed with Staphylococcus aureus. Based on this validation results a method was then developed to routinely be able to perform sterility test of the batches produced and was confirmed on 5 microbiological species (i.e Staphylococcus aureus, Pseudomonas aeruginosa, Bacillus subtilis, Candida albicans, Aspergillus brasiliensis). Our work gives a new insight for considering sterility testing by rapid microbiological method even for drugs exhibiting inhibitory effect on microbiological growth.
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Master Thesis
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https://dumas.ccsd.cnrs.fr/dumas-03019731
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Submitted on : Monday, November 23, 2020 - 2:59:18 PM
Last modification on : Monday, February 22, 2021 - 10:23:16 AM
Long-term archiving on: : Wednesday, February 24, 2021 - 7:28:44 PM

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Maïté Sangnier. Essai de stérilité des préparations produites en lot : neutralisation du pouvoir inhibiteur de la croissance bactérienne de certains cytotoxiques par des agents de complexation. Sciences du Vivant [q-bio]. 2020. ⟨dumas-03019731⟩

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