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Tumour necrosis factor gene complex polymorphisms in chronic obstructive pulmonary disease
Charlotte E Ruse1, Maureen C Hill, Martin Tobin
1Institute for Lung Health, University of Leicester, Glenfield Hospital, Groby Road, Leicester, UK. charlotte.ruse@sth.nhs.uk
Respiratory Medicine
|July 27, 2006
Summary
Genetic variations in the tumour necrosis factor (TNF) gene complex were studied in relation to chronic obstructive pulmonary disease (COPD). The lymphotoxin alpha NcoI polymorphism was linked to reduced lung function (forced vital capacity) in individuals with and without COPD.
Area of Science:
- Genetics
- Pulmonology
- Immunology
Background:
- Chronic obstructive pulmonary disease (COPD) is a major global health concern.
- The role of genetic factors, specifically tumour necrosis factor (TNF) gene complex polymorphisms, in COPD susceptibility and severity is not fully elucidated.
- Polymorphisms associated with higher TNF secretion are hypothesized to increase COPD risk or severity.
Purpose of the Study:
- To investigate the association between tumour necrosis factor gene complex polymorphisms and COPD.
- To determine if specific TNF gene variants influence disease susceptibility or severity.
Main Methods:
- Genotyping was performed for TNF-308 and lymphotoxin alpha NcoI (LTalpha) polymorphisms in 220 COPD patients and 141 controls.
- Detailed clinical phenotyping was conducted for all participants.
- Statistical analysis examined the association between genotypes and lung function parameters (FVC, FEV1).
Main Results:
- An association was found between the LTalpha NcoI polymorphism and forced vital capacity (FVC).
- The LTalpha NcoI*2 allele was linked to poorer lung function, with each copy associated with a 3.7% decrease in predicted FVC (P=0.026).
- No significant difference in genotype distribution was observed between COPD cases and controls.
Conclusions:
- The TNF gene complex, particularly the LTalpha NcoI polymorphism, may influence physiological alterations like FVC, potentially affecting COPD development and severity.
- Larger studies are required to detect modest effects of TNF gene-complex polymorphisms on COPD risk.