Evaluation of Macrophage Inflammatory Protein-1α as a Periodontal Disease Biomarker in Oral Rinse: A Cross Sectional Study

Periodontal disease is a chronic progressive state of inflammation pertaining to supporting tissues of the dentition that culminates in loss of the affected teeth. The term broadly covers both gingivitis (inflammation of the gingival connective tissue) and periodontitis (loss of supporting alveolar bone as a consequence of sustained inflammatory load on the supportive periodontal tissues). Currently, diagnosis and monitoring of periodontal disease progression is accomplished by performing a full-mouth clinical and radiological examination which is time-consuming and also requires elaborate infrastructure and equipment, which are not always available. These limitations of the conventional diagnostic techniques necessitate the development of point-of-care testing (POCT) which could serve as a rapid, feasible and affordable screening tool for periodontal disease.

Of late, chemokines have become the subject of interest for potential application as biomarkers for periodontal screening. MIP-1α is a cysteine-cysteine (C-C) chemokine that is secreted by a variety of cells like macrophages, fibroblasts, epithelial cells and endothelial cells. They principally serve to recruit leukocytes like monocytes, T lymphocytes, natural killer cells, dendritic cells and granulocytes to the site of inflammation. The primary challenge faced by researchers in analysis of host derived oral biomarkers in any sample fluid is the establishment of normal level of various biomarkers. This problem arises as the biomarkers that are found at exaggerated levels in periodontal inflammation are also detected in oral fluids in healthy periodontium but at a much lower value.

Hence, the current study has a two fold aim; first, to determine the feasibility of MIP-1α as a periodontal disease biomarker; and second, to correlate the value of MIP-1α obtained from oral rinse sample with the periodontal disease severity.