Beyond Genetics: Exploring Lifestyle, Microbiome, and Social Determinants in Oral Cancer Development

Oral cancer refers to cancers originating in the oral cavity and oropharyngeal regions. It is the 16th most prevalent cancer and the sixth leading cause of cancer-related deaths. However, the mechanisms of its progression are still being understood, and interventions to provide early diagnosis need to be improved. More studies have recently been conducted on oral cancer, and many reviews have summarized the findings in this field, focusing on individual factors. However, few review articles have evaluated the combinational impacts of different factors on oral cancer. This review aimed to provide an overview of the combinational effects of three extracellular factors, including lifestyle habits, oral microbiome, and socioeconomic factors, on oral cancer progression. Oral cancer is differentially affected by lifestyle habits; high-sugar diets, processed foods, alcohol, smoking, and possibly sleep disorders benefit its progression, whereas eating natural diets, such as fruits, vegetables, fish, and garlic, drinking tea or coffee, and physical exercise can combat it. The oral microbiome could suppress or promote oral cancer progression. Low socioeconomic status can impact oral cancer development. Furthermore, crosstalk among these three factors affects oral cancer progression. This review has limitations in not including all oral cancer-affecting factors and all important publications. More focus should be placed on the combinational effects of multiple factors on oral cancer progression and treatment. The findings in this study could update researchers on the landscape of oral cancer progression and help formulate approaches to promote oral cancer prevention and treatment.