Abstract
Background: Esophageal squamous cell carcinoma(ESCC) is severe cancer in the world. The role of esophageal microbiota for ESCC is still uncertain. In the current study, 120 paired tissues from ESCC patients were collected, and 16s rRNA sequencing was performed to explore the esophageal microbiota. Results: The present investigation shows that the diversity and composition of the microbiota in ESCC cancerous tissues and para-cancerous tissues is significantly different, this variation between subjects beta diversity mainly explained by regions and sampling seasons. Species R.Mucilaginosa, P.Endodontalis, unclassified species in genus Leptotrichia, genus Phyllobacterium, and genus Sphingomonas were enriched in cancerous tissue. On the other hand, class Bacilli, N.Subflava, H.Pylori, A.Parahaemolyticus, A.Rhizosphaerae, unclassified species in genus Campylobacter and genus Haemophilus were increased in para-cancerous tissue. Compared with the co-occurrence network in cancerous tissue, a denser and more complex association network was formed in para-cancerous tissue. Moreover, the above differential taxa also participated in both co-occurrence network but played quite different roles. Finally, the functional association analyses revealed the altered signaling pathways in ESCCs were correlated to esophageal microbiota. Conclusion: Compared with para-cancerous tissues, microbiota in cancerous tissues showed significant differences in diversity and composition. The alterations in microbial co-occurrence network and functional pathways in ESCC tissues may be involved in carcinogenesis and the maintenance of local microenvironment for ESCC. These discoveries of the esophageal microbiota for ESCC patients may contribute to the etiology for ESCC prevention, diagnosis, early intervention, and treatment.
Prognostic role of HPV infection in esophageal squamous cell carcinoma
