Structure-function insights reveal the human ribosome as a cancer target for antibiotics

Area of Science:

• Molecular Biology
• Structural Biology
• Cancer Research

Background:

• Antibiotics commonly target bacterial ribosomes, inhibiting protein synthesis.
• Targeting the human ribosome for cancer therapy, particularly in deregulated protein synthesis of cancer cells, remains underexplored at the molecular level.

Purpose of the Study:

• To investigate the human 80S ribosome as a potential cancer therapeutic target.
• To elucidate the molecular interactions between eukaryote-specific antibiotics and the human ribosome.
• To assess the anti-proliferative effects of these antibiotics on cancer cell lines.

Main Methods:

• Determined the structure of the human 80S ribosome bound to a eukaryote-specific antibiotic.
• Evaluated the anti-proliferative dose response of these antibiotics in leukaemic cells.
• Analyzed the interference with the synthesis of short-lived protein markers like c-myc and mcl-1.

Main Results:

• The structure reveals detailed interactions within the human ribosome's ligand-binding pocket, crucial for structure-assisted drug design.
• Eukaryote-specific antibiotics demonstrated significant anti-proliferative effects on various cancer cell lines.
• These antibiotics showed specificity towards cytosolic ribosomes over mitochondrial ribosomes.

Conclusions:

• The human 80S ribosome is a viable and promising target for cancer therapy.
• Eukaryote-specific antibiotics targeting the human ribosome offer a new avenue for anti-cancer drug development.
• Understanding these molecular interactions facilitates the design of novel anti-cancer agents.