Prevention of cell death by antibodies selected from intracellular combinatorial libraries

Area of Science:

• Cell Biology
• Virology
• Immunology

Background:

• Cell death is a critical biological process.
• Understanding cell death mechanisms aids in developing therapeutic strategies.
• Rhinovirus infections can lead to significant cellular damage.

Purpose of the Study:

• To identify molecules that protect cells from rhinovirus-induced cell death.
• To elucidate the mechanisms by which these protective molecules function.
• To analyze the dynamics of an in vitro selection process involving competing biological systems.

Main Methods:

• Intracellular combinatorial antibody libraries were employed for selection.
• Deep sequencing was used to monitor antibody enrichment over selection rounds.
• The function of selected antibodies was assessed by their ability to inhibit viral protease.

Main Results:

• Rare antibodies were successfully selected that conferred protection against rhinovirus infection.
• These protective antibodies were found to inhibit the virus-encoded protease essential for viral maturation.
• Deep sequencing provided a detailed view of the selection process, highlighting competition between protected and unprotected cells.

Conclusions:

• Inhibiting viral protease is a viable strategy to protect cells from rhinovirus infection.
• Intracellular antibody selection is an effective method for discovering antiviral molecules.
• The study provides a unique "test tube" model for observing evolutionary competition between viral and host systems.