Phage therapy, as an alternative to antibiotics, has garnered increased interest due to the rise of antibiotic-resistant bacteria. This study delves into the amplification and purification of T4-like coliphages for potential phage therapy applications. By utilizing various production systems such as wave bags, stirred-tank reactors, and Erlenmeyer flasks, peak titers of 10^9 to 10^10 PFU/ml for T4-like coliphages were achieved. The study focused on factors like titer, contamination level, stability, and cost-effectiveness. Techniques like membrane filtration, differential centrifugation, and sucrose cushion sedimentation were explored to concentrate phages efficiently while minimizing contamination.
The need for alternatives to antibiotics is particularly urgent in regions like the Indian subcontinent where antibiotic resistance is alarmingly high, even outside hospital settings. Previous studies have looked into passive immunity and probiotics for treating bacterial infections like E. coli diarrhea in children, with varying degrees of success. Phage therapy presents a promising avenue, especially in developing countries, where low-titer phage preparations could potentially suffice for treatment, given the ability of oral phages to amplify in the patient’s gut.
The study not only delves into the amplification and purification of T4-like coliphages but also addresses challenges such as maintaining infectivity during storage and transportation. Techniques like ultracentrifugation, ultrafiltration, and chromatography were employed to concentrate and purify phages efficiently. Mass spectrometry was used for phage identification, crucial for distinguishing between various phage strains and ensuring purity. Moreover, the study investigated the thermal stability of T4-like phages, highlighting the importance of cold chain maintenance for preserving phage infectivity.
By optimizing production methods, this research aims to pave the way for large-scale phage amplification in a cost-effective manner, making phage therapy a viable option for combating bacterial infections, especially in regions facing antibiotic resistance challenges. The findings underscore the importance of efficient purification techniques, stability assessments, and quality control measures to ensure the efficacy and safety of phage therapy applications. This research serves as a crucial step towards bridging the gap between laboratory-scale phage production and potential real-world phage therapy implementations.
Tags: chromatography, centrifugation, personalized medicine, shear stress, mass spectrometry, calibration, ultrafiltration, biotech, filtration, pilot plant
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