Intestinal stem cell marker LGR5 expression during gastric carcinogenesis.

Area of Science:

• Oncology
• Gastroenterology
• Molecular Biology

Background:

• Gastric cancer remains a significant global health challenge.
• Identifying reliable biomarkers for early diagnosis and prognosis is crucial.

Purpose of the Study:

• To investigate the differential expression of leucine-rich repeat-containing G protein-coupled receptor 5 (LGR5) in gastric cancer.
• To assess the relationship between LGR5 expression and tumor growth, dedifferentiation, and metastasis.

Main Methods:

• Immunohistochemistry was used to detect LGR5 expression in gastric cancer tissues, precancerous lesions, and normal gastric mucosa.
• Clinicopathological data, including TNM stage and Lauren type, were analyzed in relation to LGR5 expression.
• Statistical analyses, including Spearman's rank correlation and chi-squared tests, were employed.

Main Results:

• LGR5 expression was significantly elevated in gastric cancer tissues compared to normal controls.
• Increased LGR5 expression correlated with higher tumor dedifferentiation, advanced TNM stage, and poorer patient outcomes.
• LGR5 positivity was associated with increased rates of recurrence and metastasis.

Conclusions:

• Upregulated LGR5 expression is linked to gastric cancer progression, dedifferentiation, and metastasis.
• LGR5 shows potential as an early diagnostic and prognostic biomarker for gastric cancer.
• Further research into LGR5's role could lead to improved therapeutic strategies.