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Loss of Multimerin-2 and EMILIN-2 Expression in Gastric Cancer Associate with Altered Angiogenesis
Eva Andreuzzi1, Alessandra Capuano2, Rosanna Pellicani3
1Dipartimento della Ricerca e della Diagnostica Avanzata dei Tumori, Divisione di Oncologia Molecolare, Centro di Riferimento Oncologico di Aviano (CRO) IRCCS, 33081 Aviano, Italy. eandreuzzi@cro.it.
Abstract:
Gastric cancer is a deadly tumor and a relatively common disease worldwide. Surgical resection and chemotherapy are the main clinical options to treat this type of disease, however the median overall survival rate is limited to one year. Thus, the development of new therapies is a highly necessary clinical need. Angiogenesis is a promising target for this tumor type, however clinical trials with the use of anti-angiogenic drugs have so far not met expectations. Therefore, it is important to better characterize the expression of molecules whose expression levels may impact on the efficacy of the treatments. In this study the characteristics of the gastric tumor associated blood vessels were first assessed by endomicroscopy. Next, we analyzed the expression of Multimerin-2, EMILIN-2 and EMILIN-1, three molecules of the EMI Domain ENdowed (EDEN) protein family. These molecules play important functions in the tumor microenvironment, affecting cancer progression both directly and indirectly impinging on angiogenesis and lymphangiogenesis. All the molecules were highly expressed in the normal mucosa whereas in a number of patients their expression was altered. We consider that better characterizing the gastric tumor microenvironment and the quality of the vasculature may achieve effective patient tailored therapies.
Insights
New research explores gastric cancer's tumor microenvironment, focusing on blood vessel characteristics and EMI Domain ENdowed (EDEN) protein family members. Understanding these factors is crucial for developing effective, patient-tailored gastric cancer therapies.
Area of Science:
- Oncology
- Cancer Biology
- Tumor Microenvironment Research
Background:
- Gastric cancer presents a significant global health challenge with limited survival rates despite current treatments like surgery and chemotherapy.
- Anti-angiogenic therapies show promise but have yielded suboptimal clinical trial results, highlighting the need for better therapeutic targets.
- Understanding the tumor microenvironment, including vasculature and molecular expression, is essential for improving gastric cancer treatment efficacy.
Purpose of the Study:
- To characterize gastric tumor-associated blood vessels using endomicroscopy.
- To analyze the expression patterns of Multimerin-2, EMILIN-2, and EMILIN-1 within the gastric tumor microenvironment.
- To investigate the role of these EMI Domain ENdowed (EDEN) proteins in gastric cancer progression, angiogenesis, and lymphangiogenesis.
Main Methods:
- In vivo endomicroscopy was employed to assess the characteristics of blood vessels within gastric tumors.
- Quantitative analysis was performed to determine the expression levels of Multimerin-2, EMILIN-2, and EMILIN-1.
- Expression levels were compared between tumor tissues and normal gastric mucosa.
Main Results:
- Gastric tumor-associated blood vessels were characterized using endomicroscopy.
- The expression of Multimerin-2, EMILIN-2, and EMILIN-1 was evaluated in gastric cancer patients.
- These EDEN proteins, highly expressed in normal mucosa, showed altered expression in a subset of gastric cancer patients.
Conclusions:
- Alterations in EDEN protein expression within the gastric tumor microenvironment may impact treatment efficacy.
- Characterizing the gastric tumor vasculature and molecular composition is key to developing personalized therapies.
- Further research into the role of Multimerin-2, EMILIN-2, and EMILIN-1 could lead to novel therapeutic strategies for gastric cancer.
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