Objective: To investigate the protein expression of matrix metalloproteinase 2 (MMP2) and its clinical significance in laryngeal cancer.
Methods: A comprehensive search for the related literature published in China and other countries was conducted in a variety of databases, including MEDLINE, Embase, China Academic Journals Full-text Database, Wanfang Data and VIP Database. A total of seven case-control studies were included in the final systematic assessment. A meta-analysis software program was used to statistically analyze the raw data from each study for the calculation of the pooled odds ratio (OR) and 95% confidence interval (95% CI).
Results: The meta-analysis indicated that, compared with normal laryngeal tissue, the MMP2 protein was highly expressed in the laryngeal cancer tissue [OR=21.67; 95% CI: 11.61-40.43; P<0.001]. Compared with highly differentiated laryngeal cancer, the MMP2 protein expression level was higher in the moderately and poorly differentiated laryngeal cancers [OR=0.25; 95% CI: 0.13-0.46; P<0.001]. Compared with laryngeal cancers without lymph node metastasis, the laryngeal cancers with lymph node metastasis exhibited a greatly elevated MMP2 protein expression [OR=0.25; 95% CI: 0.14-0.46; P<0.001].
Conclusion: High protein expression levels of MMP2 may play an important role in the tumorigenesis, progression and prognosis of laryngeal cancer.
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