Beclin-1 may help tumor cells withstand stress from which therapies according to the study?

• A. Chemotherapy, radiation, and RTK inhibitors
• B. Surgical excision only
• C. Immunotherapy alone
• D. Antibiotic therapy

Answer: (A)

Beclin-1 is a central regulator of autophagy, a cellular recycling process that helps cells survive stress by cleaning damaged components and providing energy. In tumor cells, autophagy can act as a shield against the damage caused by cytotoxic therapies. The study suggests that Beclin-1–mediated autophagy enables tumor cells to endure the stress from chemotherapy, radiation, and receptor tyrosine kinase (RTK) inhibitors, making these systemic therapies the ones that Beclin-1 helps tumor cells withstand. Local surgical removal and therapies that rely mainly on immune mechanisms or antibiotics don’t create the same autophagy-driven stress context described, so they’re not the best fit for this concept.