Molecular pathways in vulvar squamous cell carcinoma: implications for target therapeutic strategies

Giulia Mantovani, Simona Maria Fragomeni, Frediano Inzani, Anna Fagotti, Luigi Della Corte, Stefano Gentileschi, Luca Tagliaferri, Gian Franco Zannoni, Giovanni Scambia, Giorgia Garganese

Research output: Contribution to journalReview articlepeer-review

Abstract

Background: Additional prognostic factors and personalized therapeutic alternatives for vulvar squamous cell carcinoma (VSCC), especially for advanced stages with poor prognosis, are urgently needed. Objectives: To review and assess literature regarding underlying molecular mechanisms of VSCC target therapeutic and prognostic approaches. Methods: We performed a narrative literature review from the inception of the database up to January 2020 limited to English language, organizing knowledge in five main fields: extracellular and intracellular cell cycle deregulation, tumor immune microenvironment, tumor angiogenesis and hormones. Results: EGFR immunohistochemical overexpression/gene amplification, representing early events in VSCC carcinogenesis, have been correlated with a worse prognosis and led to inclusion of erlotinib in cancer guidelines. p16 expression and HPV positivity are linked to a better prognosis, while p53 overexpression is linked to a worse prognosis; thus, biomarkers could help tailoring conventional treatment and follow-up. The implications of PD-L1 positivity in reference to HPV status and prognosis are still not clear, even though pembrolizumab is part of available systemic therapies. The role of tumor angiogenesis emerges through data on microvessel density, immunohistochemical VEGF staining and evaluation of serum VEGF concentrations. Few data exist on hormonal receptor expression, even though hormonal therapy showed great manageability. Conclusions: We suggest adding p16, p53 and HPV status to routine hystopathological examination of vulvar biopsies or surgical specimens. Predictive biomarkers for anti-EGFR and anti-PD-1/PD-L1 drugs are needed. Enough preclinical data supporting anti-angiogenic target therapies in clinical trials are existing. Hormonal receptor expression deserves further investigation.

Original languageEnglish
Pages (from-to)1647-1658
Number of pages12
JournalJournal of Cancer Research and Clinical Oncology
Volume146
Issue number7
DOIs
Publication statusPublished - Jul 1 2020

Keywords

  • Disease-free survival
  • Genes
  • Molecular pathways
  • Mutation
  • Prognosis
  • Treatment
  • Vulvar neoplasms

ASJC Scopus subject areas

  • Oncology
  • Cancer Research

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