Are postoperative complications genetically determined by TNF-beta NcoI gene polymorphism?

Area of Science:

• Genetics and Immunology
• Surgical Complications
• Molecular Biology

Background:

• Postoperative infectious complications are a primary cause of sepsis.
• Tumor necrosis factor-beta (TNF-beta) NcoI polymorphism is linked to increased mortality in severe sepsis.
• Investigating the association between TNF-beta NcoI polymorphism and postoperative complications is crucial.

Purpose of the Study:

• To determine if the biallelic NcoI polymorphism in the TNF locus is associated with the development of postoperative complications.
• To correlate TNF-beta gene NcoI polymorphism with the incidence and severity of complications after major gastrointestinal surgery.

Main Methods:

• Prospective observational study of 160 patients undergoing major gastrointestinal surgery.
• Documentation of minor and severe postoperative complications during clinical course.
• Analysis of TNF-beta gene NcoI polymorphism using polymerase chain reaction (PCR) and correlation with complications.

Main Results:

• Patients with the heterozygous TNF-beta1/beta2 genotype showed a 1.6-fold increased risk of complications.
• Patients with the homozygous TNF-beta2/beta2 genotype had a 1.5-fold increased risk of severe complications.
• Mortality in patients with postoperative sepsis was significantly elevated in those homozygous for the TNF-beta2 genotype.

Conclusions:

• The TNF-beta NcoI polymorphism significantly influences the development and severity of postoperative complications.
• The TNF-beta1/beta2 genotype is associated with a higher general risk of complications.
• The TNF-beta2/beta2 genotype is linked to more severe complications and increased mortality from sepsis.