The association between elevated serum lactate dehydrogenase (sLDH) and poor prognosis in metastatic melanoma patients is well‐established but poorly understood. Our multi‐omics analysis of multiple cohorts of patients with melanoma metastases identified no significant intratumoral molecular, immunological, or metabolic associations with sLDH, supporting that sLDH serves at least partially as a surrogate of tumor burden but not of adverse tumor features.
ABSTRACT
Elevated serum lactate dehydrogenase (sLDH) is associated with poor clinical outcomes in patients with stage IV metastatic melanoma (MM). It is currently unknown if sLDH elevation correlates with distinct molecular, metabolic, or immune features of melanoma metastases. The identification of such features may identify rational therapeutic strategies for patients with elevated sLDH. Thus, we obtained sLDH levels for melanoma patients with metastases who had undergone molecular and/or immune profiling. Our analysis of multi‐omics data from independent cohorts of melanoma metastases showed that elevated sLDH was not significantly associated with differences in immune cell infiltrate, point mutations, DNA copy number variations, promoter methylation, RNA expression, or protein expression in melanoma metastases. The only significant association observed for elevated sLDH was with the number of metastatic sites of disease. Our data support that sLDH correlates with disease burden, but not specific molecular or immunological phenotypes, in metastatic melanoma.
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