1. Lysyl Oxidase Like-4 (LOXL4) as a tumor marker and prognosticator in advanced stage laryngeal cancer
- Author
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Yeşim Gaye Güler Tezel, Taner Yılmaz, Hayriye Tatlı Doğan, Ozan Muzaffer Altuntaş, and Nilda Süslü
- Subjects
Organ preservation ,Laryngectomy ,Lysyl oxidase ,Protein-Lysine 6-Oxidase ,03 medical and health sciences ,0302 clinical medicine ,Downregulation and upregulation ,LOXL4 protein ,Biomarkers, Tumor ,Humans ,Medicine ,Stage (cooking) ,Hypoxia ,030223 otorhinolaryngology ,Laryngeal Neoplasms ,Neoplasm Staging ,Tumor marker ,Squamous Cell Carcinoma of Head and Neck ,business.industry ,Head and neck cancer ,Induction chemotherapy ,Cancer ,Larynx cancer ,Prognosis ,medicine.disease ,eye diseases ,Otorhinolaryngology ,030220 oncology & carcinogenesis ,Cancer research ,Immunohistochemistry ,business - Abstract
Introduction Lysyl oxidase-like 4 is an amine oxidase from the lysyl oxidase family that was previously shown to be overexpressed in head and neck cancer and upregulated in response to hypoxia. The possible role of lysyl oxidase-like 4 as a tumor marker in advanced stage larynx cancer was investigated. Objective To investigate the expression of lysyl Oxidase-Like 4 protein in advanced stage laryngeal cancer and elucidate its possible role as a tumor marker, predictor of treatment response and prognosticator. Methods Diagnostic specimens of 72 patients treated for stage III–IV laryngeal squamous cell carcinoma were evaluated for lysyl oxidase-like 4 expression by immunohistochemistry. Results Lysyl oxidase-like 4 expression was correlated with advanced tumor stage (p = 0.041) and better differentiation (p = 0.025) but was independent of tumor diameter (p = 0.456). Response to induction chemotherapy or the need for salvage laryngectomy were not affected by lysyl oxidase-like 4 expression (p = 0.999, p = 0.070 respectively). Increased lysyl oxidase-like 4 expression was associated with better 2 year overall survival in both univariate (p = 0.036) and multivariate analyses (p = 0.014). Conclusion Lysyl oxidase-like 4 expression emerges with advancing stages, is lost with worsening differentiation, and may have tumor suppressive properties in larynx cancer.
- Published
- 2022
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