Upper gastrointestinal (UGI) cancers, particularly esophageal squamous cell carcinoma (ESCC) and gastric cancer (GC), are a significant health issue in China. Alarmingly, over half of the world’s cases of these cancers occur there. Early signs of these cancers can be vague, leading many patients to only discover they have it at later stages when treatment is less effective. While endoscopic screening helps detect these cancers earlier, it’s not widely accessible due to costs and its invasive nature. Hence, pinpointing high-risk individuals for screening is critical.
The development of UGI cancer stems from a mix of genetic factors and environmental influences. Although many studies have found various genetic and lifestyle risk factors, how these combine to inform individual risk stratification remains a mystery.
A recent study provides important insights into this issue. Researchers explored data from 5,556 participants involved in an endoscopic screening initiative designed for high-risk areas in China. They performed genome-wide association studies for ESCC and GC and assessed genetic risk using polygenic risk scores (PRSs). They also examined various lifestyle factors, including smoking, alcohol use, body weight, physical activity, and diet, to create a “healthy lifestyle score.”
Essentially, the research revealed a new genetic vulnerability for GC located on chromosome 6p12.1. By incorporating PRS into traditional risk models, the researchers boosted the predictive accuracy for ESCC and GC by 6.5% and 7.2%, respectively. Those with high genetic risk coupled with poor lifestyle choices faced significantly higher risks—nearly 2.75 times for ESCC and over 4 times for GC—compared to those with low genetic risk and healthier habits. Notably, maintaining a healthy lifestyle diminished the risk of developing cancer, especially among those with high genetic susceptibility.
This study emphasizes that merging genetic and lifestyle factors can enhance risk assessments and help identify people who would benefit the most from preventive measures and screening. These findings support a more informed approach to UGI cancer prevention, maximizing resources in areas with higher risks.
Experts, including Professor Wenqiang Wei and Professor Shaoming Wang from the National Cancer Center, spearheaded this study. Their work underscores an ongoing commitment to understanding and combating UGI cancers, potentially impacting healthcare strategies in the future.
Overall, as awareness of lifestyle influences grows, individuals may change habits to reduce their cancer risk. The combination of genetic insights and lifestyle modifications is a promising step forward in cancer prevention strategies.
