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Published on: December 1, 2016
Daylight photodynamic therapy for field cancerization: lessons from molecular biology
Max Rybarski1, Lutz Schmitz2, Ben Novak1
1Department of Animal Physiology, Ruhr-University, Bochum, Germany.
Abstract:
Actinic keratoses (AKs) represent in-situ squamous cell carcinomas that potentially invade subepidermal structures and may metastasize. Until now, it is unpredictable to determine which AK lesions show this aggressive behavior. As AKs usually occur in large sun exposed areas, field-directed treatments have become the standard treatment regimen. Among these, conventional photodynamic therapy (cPDT) with 5-aminolaevulinic acid (ALA) or methyl-aminolevulinate (MAL) using red light is particularly effective in the treatment of AKs, but acceptance of the therapy is impaired by severe pain during treatment. Daylight PDT (dPDT) has demonstrated to be an equally effective alternative treatment option which is less painful. Recent attempts to determine the risk of AKs that demonstrate particular aggressive biological behavior by implementation of clinical and histological characteristics of AKs have not lead to conclusive results. Therefore, a look at the molecular biology of AKs could serve as a useful tool to develop a risk profiling for separation of those patients that are of particular risk to develop invasive tumor and, by this, to facilitate a more effective and adapted treatment option.
Insights
Predicting aggressive actinic keratoses (AKs) is challenging. Molecular biology insights may help identify high-risk AK lesions for tailored treatments, improving patient outcomes.
Area of Science:
- Dermatology
- Oncology
- Molecular Biology
Background:
- Actinic keratoses (AKs) are precursors to squamous cell carcinoma with unpredictable metastatic potential.
- Field-directed treatments like photodynamic therapy (PDT) are standard for widespread AKs.
- Conventional PDT (cPDT) is effective but painful; Daylight PDT (dPDT) offers a less painful alternative.
Purpose of the Study:
- To explore molecular biology of AKs for improved risk stratification.
- To develop methods for identifying AKs with aggressive behavior.
- To facilitate personalized treatment strategies for high-risk patients.
Main Methods:
- Review of current clinical and histological limitations in AK risk assessment.
- Exploration of molecular markers for AK aggressiveness.
- Proposed development of a molecular risk profiling tool.
Main Results:
- Current clinical and histological factors are insufficient for predicting AK invasiveness.
- Molecular biology offers a promising avenue for risk assessment.
- A molecular approach could differentiate high-risk AKs.
Conclusions:
- Molecular profiling is essential for accurate AK risk assessment.
- Identifying aggressive AKs will enable targeted therapies.
- This approach can optimize treatment and reduce metastasis risk.
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