MicroRNA sequence and function analysis in peri-implantitis and periodontitis: An animal study

Area of Science:

• Oral Biology and Pathology
• Molecular and Cellular Biology
• Genomics and Transcriptomics

Background:

• Periodontitis and peri-implantitis share similarities but possess distinct molecular mechanisms.
• Understanding transcriptional differences is crucial for effective management strategies.
• MicroRNA (miRNA) dysregulation is implicated in inflammatory oral diseases.

Purpose of the Study:

• To compare miRNA expression profiles between periodontitis (PD) and peri-implantitis (PI).
• To predict target genes and associated signaling pathways in PD and PI.
• To elucidate molecular mechanisms underlying these distinct inflammatory conditions.

Main Methods:

• Establishment of rat models for periodontitis (PD) and peri-implantitis (PI) using ligation.
• Micro-computed tomography (Micro-CT) for model validation.
• miRNA transcriptome sequencing of gingival tissue, validated by qRT-PCR; target gene prediction using miRTarBase; Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analyses.

Main Results:

• Significant differential expression of 69 miRNAs between PI and PD, 105 between PI and controls (PIC), and 70 between PD and controls (PDC).
• Upregulated genes in PI vs. PD and PI vs. PIC were enriched in Toll-like receptor and RIG-I-like signaling pathways.
• Downregulation of focal adhesion and adherens junction pathways observed in comparisons involving PD and PI.

Conclusions:

• Distinct miRNA expression profiles differentiate peri-implantitis from periodontitis.
• Identification of specific target genes and molecular pathways provides insights into disease mechanisms.
• Findings support the development of novel therapeutic and management strategies for oral inflammatory diseases.