Hyperglycemia induces inflammatory mediators in the human chorionic villous

Area of Science:

• Reproductive Biology
• Immunology
• Endocrinology

Background:

• Gestational hyperglycemia is linked to adverse pregnancy outcomes.
• The role of inflammasomes and IL-1β in placental inflammation during hyperglycemia is not fully understood.

Purpose of the Study:

• To investigate the association between maternal hyperglycemia and placental inflammation.
• To examine the role of inflammasome activation in placental tissues across different glycemic states.

Main Methods:

• Classified pregnant women into non-diabetic, mild hyperglycemia, gestational diabetes mellitus, and type 2 diabetes mellitus groups.
• Measured pro-inflammatory factors (IL-1β, IL-6, MCP-1) in plasma and placental tissues using ELISA and immunohistochemistry.
• Assessed NFKB activity and inflammasome protein expression (NLRP1, NLRP3, ASC, Caspase 1) via electrophoretic mobility shift assay and Western blot.

Main Results:

• All hyperglycemic groups showed increased maternal plasma and placental inflammatory factors.
• Up-regulation of inflammasome components (NLRP1, NLRP3, ASC, Caspase 1) and increased NFKB activity were observed in hyperglycemic conditions.
• Placental tissues exhibited increased expression of inflammatory markers like iNOS, MCP-1, TLR2, and TLR4.

Conclusions:

• Maternal hyperglycemia, irrespective of severity, induces systemic and placental inflammation.
• Inflammasome activation and IL-1β secretion are implicated in the inflammatory response to hyperglycemia during pregnancy.
• Targeting inflammasome activation may be crucial for managing hyperglycemia and improving pregnancy outcomes.