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Matrix Metalloproteinase-9 (MMP-9) polymorphisms in patients with cutaneous malignant melanoma
Javier Cotignola1, Boris Reva, Nandita Mitra
1Memorial Sloan-Kettering Cancer Center, New York, NY, USA. cotignoj@mskcc.org
Background:
Cutaneous Malignant Melanoma causes over 75% of skin cancer-related deaths, and it is clear that many factors may contribute to the outcome. Matrix Metalloproteinases (MMPs) play an important role in the degradation and remodeling of the extracellular matrix and basement membrane that, in turn, modulate cell division, migration and angiogenesis. Some polymorphisms are known to influence gene expression, protein activity, stability, and interactions, and they were shown to be associated with certain tumor phenotypes and cancer risk.
Methods:
We tested seven polymorphisms within the MMP-9 gene in 1002 patients with melanoma in order to evaluate germline genetic variants and their association with progression and known risk factors of melanoma. The polymorphisms were selected based on previously published reports and their known or potential functional relevance using in-silico methods. Germline DNA was then genotyped using pyrosequencing, melting temperature profiles, heteroduplex analysis, and fragment size analysis.
Results:
We found that reference alleles were present in higher frequency in patients who tend to sunburn, have family history of melanoma, higher melanoma stage, intransit metastasis and desmoplastic melanomas among others. However, after adjustment for age, sex, phenotypic index, moles, and freckles only Q279R, P574R and R668Q had significant associations with intransit metastasis, propensity to tan/sunburn and primary melanoma site.
Conclusion:
This study does not provide strong evidence for further investigation into the role of the MMP-9 SNPs in melanoma progression.
Insights
Genetic variants in the Matrix Metalloproteinase-9 (MMP-9) gene were analyzed in melanoma patients. While some associations were observed, the study found no strong evidence to support further investigation into MMP-9 single nucleotide polymorphisms (SNPs) in melanoma progression.
Area of Science:
- Oncology
- Genetics
- Dermatology
Background:
- Cutaneous malignant melanoma is a deadly skin cancer linked to various factors.
- Matrix Metalloproteinases (MMPs), particularly MMP-9, are crucial in extracellular matrix remodeling, influencing cancer cell behavior.
- Gene polymorphisms can alter MMP-9 function and are associated with cancer risk and tumor phenotypes.
Purpose of the Study:
- To investigate the association between seven MMP-9 gene polymorphisms and melanoma progression in 1002 patients.
- To evaluate the role of germline genetic variants in melanoma risk factors and clinical outcomes.
Main Methods:
- Genotyping of seven selected MMP-9 polymorphisms using pyrosequencing and other molecular techniques.
- Analysis of germline DNA from 1002 melanoma patients to identify genetic variants.
- In-silico methods were used to select polymorphisms with potential functional relevance.
Main Results:
- Reference alleles of MMP-9 were more frequent in patients with sun sensitivity, family history, advanced melanoma stage, and intransit metastasis.
- After adjusting for clinical factors, only Q279R, P574R, and R668Q polymorphisms showed significant associations with specific melanoma characteristics.
- These characteristics included intransit metastasis, tanning/sunburning propensity, and primary tumor site.
Conclusions:
- The study did not find compelling evidence to warrant further research into the role of MMP-9 single nucleotide polymorphisms (SNPs) in melanoma progression.
- The investigated MMP-9 variants may not be significant drivers of melanoma development or advancement.
