Abstract
Background: Matrix metalloproteinases (MMPs) have been implicated in aggressiveness, invasiveness and metastasis of many malignancies including oral squamous cell carcinoma. In the meta-analysis of microarray based Oral Tongue SCC gene expression profiles, MMP-1 and MMP-9 was highly up-regulated .Till date, non-invasive diagnostic aid to detect the malignant potential of OPML or the aggressiveness of OSCC is lacking. With this background we decided to see the level of MMP-1 and MMP- 9 in saliva and serum of OSCC patients with controls.
 Aim: To determine the level of MMP1 and MMP9 in serum and saliva of patients diagnosed with OSCC, OPML, normal and to correlate with the aggressiveness of the disease.
 Methodology: The epidemiologic data of the patients reporting to our dental college & Hospital were obtained through an interview. After obtaining written consent from the patient, complete intra oral examination was done, blood, saliva was collected and stored using the standard protocol. ELISA was done on all the samples for MMP-1 and MMP9.
 Results: MMP-1 in serum and MMP-9 in saliva/ serum was up-regulated in OSCC, moderately up-regulated in OPML when compared to the control group. However MMP-1 in saliva was found to be very low or non detectable.
 Conclusion: The MMP-9 in saliva/serum and MMP-1 in serum was up-regulated in the OSCC. In future, may be these body fluids can be used to diagnose and to determine aggressiveness of OPML and OSCC by non-invasive techniques.
 Keywords:Enzyme-Linked Immunosorbent Assay (ELISA ), Matrix Metalloproteinase (MMP),Oral Potentially Malignant Lesions (OPML), Oral Squamous Cell Carcinoma( OSCC), Oral Tongue Squamous Cell Carcinoma
 ( OTSCC).
Highlights
Oral cancer is the sixth most common cancer, with an annual incidence of 36.2 million and approximately 8.2 million deaths per year all over the world
Materials and Methods: The aim and objectives of the study was to determine the expression of Matrix metalloproteinases (MMPs)-1 and MMP-9 in serum and saliva of patients diagnosed with Oral squamous cell carcinoma (OSCC), Oral potentially malignant lesions, normal patients and to correlate with the aggressiveness of the disease
There was a need of homogenous studies with saliva and serum samples of same patients. This is the first study in its nature to determine the expression level of Matrix metalloproteinase-1 (MMP-1) and MMP-9 in serum and saliva of patients diagnosed with Oral Squamous cell carcinoma (OSCC), Oral Potentially Malignant Lesions, normal and to correlate with the aggressiveness of the disease
Summary
Oral cancer is the sixth most common cancer, with an annual incidence of 36.2 million and approximately 8.2 million deaths per year all over the world. In the meta-analysis of microarray based Oral Tongue SCC gene expression profiles, MMP-1 and MMP-9 was highly up-regulated .Till date, noninvasive diagnostic aid to detect the malignant potential of OPML or the aggressiveness of OSCC is lacking. With this background we decided to see the level of MMP-1 and MMP- 9 in saliva and serum of OSCC patients with controls. Aim: To determine the level of MMP1 and MMP9 in serum and saliva of patients diagnosed with OSCC, OPML, normal and to correlate with the aggressiveness of the disease.
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