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Assessment of Angiogenic Properties of Malignant Pleural Effusion (MPE) Fluid
Constantina Santorinaiou1, Margarita Lamprou2, Eleni Mourkogianni2
1Basic Sciences Laboratory, Department of Physiotherapy, School of Health Sciences, University of the Peloponnese, Tripoli, Greece.
Abstract:
Patients with various malignancies can develop malignant pleural effusion (MPE). MPE is the abnormal accumulation of fluid in the pleural cavity. This fluid usually contains immune cells, tumor cells, and high levels of plasma proteins. This condition is associated with impaired pleural fluid drainage and is considered an immune and angiogenic manifestation of tumors metastasized in the pleura from other thoracic and non-thoracic areas. Tumor-induced pleural vascular hyperpermeability and neoangiogenesis are crucial to pleural fluid accumulation and could be therapeutically targeted to minimize MPE development. Here, we present two methodologies required for assessing the angiogenic properties of MPE fluid-Evans' blue pulse-and-chase for evaluating increased vascular permeability and the chorioallantoic membrane (CAM) assay to assess tumor-triggered angiogenesis. We describe the steps for experimental MPE formation in mice, including MPE fluid collection, evaluation of MPE-induced vascular permeability, and assessment of MPE-induced angiogenesis.
Insights
Malignant pleural effusion (MPE) involves fluid buildup due to cancer. New methods assess MPE fluid
Area of Science:
- Oncology
- Pulmonary Medicine
- Vascular Biology
Background:
- Malignant pleural effusion (MPE) is a common complication of various cancers, characterized by abnormal fluid accumulation in the pleural cavity.
- MPE fluid contains immune cells, tumor cells, and plasma proteins, indicating impaired pleural fluid drainage and a pro-angiogenic tumor microenvironment.
- Tumor-induced vascular hyperpermeability and neoangiogenesis in the pleura are key drivers of MPE development and represent potential therapeutic targets.
Purpose of the Study:
- To present and describe two methodologies for assessing the angiogenic properties of MPE fluid.
- To evaluate increased vascular permeability and tumor-triggered angiogenesis associated with MPE.
- To provide a framework for experimental MPE induction in mice for further study.
Main Methods:
- Evans' blue pulse-and-chase assay to evaluate increased vascular permeability in MPE.
- Chorioallantoic membrane (CAM) assay to assess tumor-induced angiogenesis in MPE.
- Experimental induction of MPE in mice, including fluid collection and assessment of angiogenic properties.
Main Results:
- The study outlines procedures for assessing MPE-induced vascular permeability using the Evans' blue method.
- The study details the application of the CAM assay for evaluating MPE-associated angiogenesis.
- Methodologies for experimental MPE formation and fluid analysis in mice are described.
Conclusions:
- The presented methodologies enable the assessment of angiogenic factors within MPE fluid.
- These methods can help elucidate the role of angiogenesis in MPE pathogenesis.
- Understanding and targeting MPE-associated angiogenesis may lead to novel therapeutic strategies for cancer patients.
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