RT Journal Article T1 HLA class I and class II frequencies in patients with cutaneous malignant melanoma from southeastern Spain: the role of HLA-C in disease prognosis A1 Campillo, José A1 Martínez-Escribano, José A1 Muro, Manuel A1 Moya Quiles, Rosa A1 Marín, Luis A1 Montes Ares, Olga A1 Guerra Pérez, Natalia A1 Sánchez Pedreño, Pedro A1 Frías, José A1 Lozano, José A1 García Alonso, Ana A1 Alvarez López, Rocío AB Available data have led to a controversy on the relationship between human leukocyte antigen (HLA) and cutaneous malignant melanoma susceptibility or prognosis. Moreover, the influence of HLA-C on melanoma has not yet been well established. Therefore, the aim of the current study was to analyze the possible influence of the HLA system on melanoma susceptibility and prognosis in the Spanish population. For this purpose, HLA-A and HLA-B serotyping and HLA-C, HLA-DRB1, and HLA-DQB1 genotyping by polymerase chain reactions using sequence-specific oligonucleotide (PCR-SSO) and sequence-specific primer (PCR-SSP) were performed in 174 melanoma patients and 227 ethnically matched controls. The number of controls was increased up to 356 for HLA-C typing. Patients were stratified according to the histological subtypes of melanoma, sentinel lymph node status, tumor thickness, and ulceration of primary lesion. No HLA-A, HLA-B, HLA-DRB1, or HLA-DQB1 relationship with melanoma was observed for susceptibility or disease prognosis. However, the analysis of HLA-C locus showed that individuals homozygous for HLA-CLys80 were significantly more frequent within the patient than the control group. Remarkably, individuals homozygous for group 2 HLA-C alleles (HLA-CLys80) seem to be associated with metastatic progression of melanoma. In contrast, we found a negative association between group 1 HLA-C alleles (HLA-CAsn80) and disease susceptibility or metastasis development. In conclusion, although an association with HLA-A, HLA-B, HLA-DRB1, or HLA-DQB1 was not demonstrated, the study of the HLA-C locus revealed that the analysis of the dimorphism at position 80 in the α1 helix may help to evaluate the risk and prognosis of melanoma in our population. PB Springer SN 0093-7711 YR 2006 FD 2006 LK https://hdl.handle.net/20.500.14352/97965 UL https://hdl.handle.net/20.500.14352/97965 LA eng NO Campillo, J.A., Martínez-Escribano, J.A., Muro, M. et al. HLA class I and class II frequencies in patients with cutaneous malignant melanoma from southeastern Spain: the role of HLA-C in disease prognosis. Immunogenetics 57, 926–933 (2006). https://doi.org/10.1007/s00251-005-0065-2 DS Docta Complutense RD 7 abr 2025