Human Exoproteome in Acute Apical Abscesses

Area of Science:

• Oral biology
• Proteomics
• Immunology

Background:

• Acute apical abscesses result from bacterial invasion of periapical tissues.
• Host factors during abscess formation are poorly understood.
• This study focuses on the human exoproteome in abscess samples.

Purpose of the Study:

• To characterize the human exoproteome in acute apical abscesses.
• To identify host proteins involved in the abscess formation process.

Main Methods:

• Pus samples were collected from 14 patients with acute apical abscesses.
• Proteins were digested and analyzed using mass spectrometry.
• Identified human proteins were categorized by function.

Main Results:

• 303 human proteins were identified.
• Proteins involved in cellular processes, metabolism, and immune response were abundant.
• Key immune proteins included immunoglobulins, S100, complement, and heat shock proteins.
• Neutrophil proteins (myeloperoxidases, defensins, elastases) and iron-sequestering proteins (transferrin, lactoferrin) were detected.

Conclusions:

• The human exoproteome in acute apical abscesses is diverse, encompassing cellular, metabolic, and immune functions.
• Identified proteins highlight host antimicrobial strategies and tissue protection mechanisms.
• Proteomics offers insights into host-pathogen interactions and disease pathogenesis.