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Published on: August 1, 2012
Macrophage polarisation in caesarean scar diverticulum
Jinfa Huang1, Xiaochun Liu2, Yi Hou3
1Department of Gynecology, Shunde Hospital of Southern Medical University, Foshan, Guangdong, China.
Aims:
To determine immunohistochemical features and correlations between M1/M2 polarisation status with disease severity of post-caesarean scar diverticulum (CSD).
Methods:
Histological and immunohistological stainings were performed and inflammatory (CD16, CD163 and tumour necrosis factor-α (TNF-α)), fibrosis (α-smooth muscle actin (α-SMA)) and angiogenic (CD31) markers were examined in uterine tissues collected from patients with uterine scar diverticula (CSD) (n=37) and caesarean section (CS) (n=3).
Results:
CSD tissues have higher expression of α-SMA, TNF-α, CD16 and CD31 and lower expression of CD163 than CS tissue (p<0.05). Compared with adjacent tissues, thick-walled blood vessels, glands and fibrotic sites have higher expression of α-SMA, TNF-α and CD16. Statistical correlation was observed between the expression of CD16 and TNF-α (R=0.693, p<0.001), α-SMA (R=0.404, p<0.05) and CD31 (R=0.253, p<0.05) in CSD tissues, especially with the ratio of CD16/CD163 (R=0.590, p<0.01). A more significant difference was observed between the expression of CD16/CD163 and α-SMA (R=0.556, p<0.001), TNF-α (R=0.633, p<0.0001) and CD31 (R=0.336, p<0.05).
Conclusions:
In this study, TNF-α, α-SMA, CD16 and CD31 proteins were overexpressed in all CSD cases, and CD16/CD163 was positively correlated with tissue inflammation, fibrosis and neovascularisation. Abnormal mononuclear macrophage infiltration may be involved in the origin and progression of CSD.
Insights
Post-caesarean scar diverticulum (CSD) tissues show increased inflammation, fibrosis, and neovascularisation markers compared to normal caesarean section tissues. Macrophage polarisation may drive CSD development and severity.
Area of Science:
- Reproductive medicine
- Immunohistochemistry
- Pathology
Background:
- Post-caesarean scar diverticulum (CSD) is a complication of caesarean section.
- Understanding the underlying pathophysiology of CSD is crucial for effective management.
Purpose of the Study:
- To investigate the immunohistochemical features of CSD.
- To correlate M1/M2 macrophage polarisation status with CSD disease severity.
Main Methods:
- Histological and immunohistochemical analyses were performed on uterine tissues from patients with CSD (n=37) and controls (n=3).
- Markers for inflammation (CD16, CD163, TNF-α), fibrosis (α-SMA), and angiogenesis (CD31) were examined.
Main Results:
- CSD tissues exhibited higher expression of α-SMA, TNF-α, CD16, and CD31, and lower CD163 expression compared to control tissues.
- Significant correlations were found between CD16 expression, the CD16/CD163 ratio, and markers of inflammation, fibrosis, and neovascularisation in CSD tissues.
Conclusions:
- Overexpression of TNF-α, α-SMA, CD16, and CD31 was observed in CSD cases.
- The CD16/CD163 ratio correlated positively with tissue inflammation, fibrosis, and neovascularisation, suggesting a role for abnormal macrophage infiltration in CSD pathogenesis.
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