Exploration of biological effects and AUTAC drug approach potential of antibiotics

Lung cancer, a pervasive and lethal disease, requires more effective treatments due to the limitations of existing options. Innovative approaches, such as AUTACs (Autophagy Targeting Chimeras) targeting autophagy modulation, hold promise in disrupting cancer cell survival mechanisms. AUTAC, inspired by selective autophagy, allows selective destruction of disease-related targets. In this system, a chimeric molecule is formed by combining a drug that specifically binds to the target and another that binds to autophagosomes. This chimeric molecule facilitates the accumulation of targeted structures in autophagosomes, leading to their destruction in autolysosomes. Consequently, target molecules are separated from the cell and degraded, presenting a novel approach for targeted therapeutic interventions. The main subject of this thesis is the development of chimeric chemical drugs that will provide targeted destruction of disease-related structures and organelles by the autophagy-lysosome system. Initially, cellular targets and two antibiotics binding to these targets were identified. Subsequently, the impact of these antibiotics was investigated in various cell lines. Non-small cell lung cancer (NSCLC) cell lines and the BEAS-2B bronchial epithelial cell line were employed to assess and compare the effects of these drugs on cancer and normal cells. The comparative analysis included an examination of the drugs' binding capabilities to targets, their influence on autophagy, and their impact on other cellular process in both cancer and normal cells. Furthermore, the anti-cancer properties of these drugs were explored, particularly in combination with chemotherapy drug. This investigation yielded insights into the targeting capabilities and applicability of the two drugs, particularly within the AUTAC system. The combination of these drugs with a linker has the potential to expand therapeutic applications. This innovative approach holds promise for its utilization in the treatment of various diseases.