Secretory Phospholipase A2 Digital Expression Analysis in Colon Adenocarcinoma

Phospholipases A2 represent a family of enzymes that regulate the metabolism of phospholipids by hydrolyzing them into fatty acids. Secretory phospholipase A2 (SPLA2) catalyzes the calcium-dependent 2-acyl groups hydrolysis to produce 3-sn-phosphoglycerides. This study aimed to investigate SPLA2 exp...

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Bibliographic Details
Published in:In vivo (Athens) 2022-03, Vol.36 (2), p.738-742
Main Authors: Falidas, Evangelos, Kitsiouli, Eirini, Spyropoulou, Despoina, Tsiambas, Evangelos, Kalogirou, Asimina, Tsouvelas, George, Papadopoulos, Stylianos, Mitsis, Michail, Lekka, Marilena, Mastronikoli, Sofianiki, Peschos, Dimitrios, Dimas, Odysseas, Vlachos, Konstantinos
Format: Article
Language:English
Subjects:
Colonic Neoplasms - genetics
Fatty Acids
Humans
Immunohistochemistry
Phospholipases A2, Secretory - genetics
Phospholipids
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Summary:Phospholipases A2 represent a family of enzymes that regulate the metabolism of phospholipids by hydrolyzing them into fatty acids. Secretory phospholipase A2 (SPLA2) catalyzes the calcium-dependent 2-acyl groups hydrolysis to produce 3-sn-phosphoglycerides. This study aimed to investigate SPLA2 expression in colon adenocarcinoma (CA). Thirty (n=30) formalin-fixed, paraffin-embedded primary CA tissue sections were used and analyzed. Immunohistochemistry was performed using an anti-SPLA2 antibody. Digital image analysis was also implemented for evaluating objectively the corresponding protein expression levels. Increased SPLA2 protein expression (high & moderate immunostaining levels) was observed in 23/30 (76.6%) cases, whereas 7/30 (23.4%) CA tissues demonstrated low protein levels. High expression levels were detected in 9/30 (30%) cases. SPLA2 overall expression was strongly associated with tumor diameter (p=0.004), whereas other statistically significant associations were not observed (stage: p=0.971, inflammatory infiltration: p=0.795; carcinoma location: p=0.340; differentiation grade: p=0.748; sex: p=0.369; ulceration: p=0.433). SPLA2 over-expression is observed in significant subsets of CAs correlating with advanced tumor growth progression (increased diameter). SPLA2 seems to influence endogenous cell responses by its crucial enzymatic activity and can potentially be a biomarker for monitoring CA patients.
ISSN:0258-851X
1791-7549
DOI:10.21873/invivo.12760