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Diabetic nephropathy patients show hyper-responsiveness to N6-carboxymethyllysine
C G Dias1, L Venkataswamy2, S Balakrishna1
1Department of Cell Biology and Molecular Genetics, Sri Devaraj Urs Academy of Higher Education and Research, Kolar, India.
Abstract:
The aim of this study was to evaluate the impact of N6-carboxymethyllysine (CML) on NF-κB gene expression and tumor necrosis factor (TNF) production in diabetic nephropathy. This was an observational study comprised of three groups: diabetic nephropathy (n=30), type II diabetes mellitus (n=28), and healthy volunteers (n=30). Blood samples collected from the study participants were cultured for 24 h in the presence of CML or an appropriate control. After incubation, the cultures were centrifuged to separate the cells from the conditioned media. cDNA was prepared from the cell pellet and used to quantify NF-κB gene expression by quantitative real-time polymerase chain reaction (PCR). The conditioned media were used to measure TNF production by enzyme-linked immunosorbent assay (ELISA). The CML-induced fold change in NF-κB gene expression was significantly different among the study groups (P=5.4×10-5). Also, the CML-induced fold change in TNF levels was significantly different among the three groups (P=4.3×10-8). These results imply that patients with diabetic nephropathy and type II diabetes mellitus showed an elevated response to CML.
Insights
N6-carboxymethyllysine (CML) significantly impacts NF-κB gene expression and TNF production in diabetic nephropathy and type II diabetes. Patients with these conditions showed an elevated response to CML.
Area of Science:
- Nephrology
- Endocrinology
- Immunology
Background:
- Diabetic nephropathy is a serious complication of diabetes mellitus.
- N6-carboxymethyllysine (CML) is an advanced glycation end product implicated in diabetic complications.
- NF-κB and TNF are key inflammatory mediators in diabetes.
Purpose of the Study:
- To investigate the effect of CML on NF-κB gene expression and TNF production.
- To compare these effects in patients with diabetic nephropathy, type II diabetes, and healthy controls.
Main Methods:
- Observational study with three groups: diabetic nephropathy (n=30), type II diabetes (n=28), and healthy volunteers (n=30).
- Blood samples were cultured with CML or control.
- NF-κB gene expression quantified using quantitative real-time PCR.
- TNF production measured by ELISA.
Main Results:
- CML significantly altered NF-κB gene expression and TNF levels among the groups (P=5.4×10-5 and P=4.3×10-8, respectively).
- Patients with diabetic nephropathy and type II diabetes exhibited an elevated response to CML compared to healthy controls.
Conclusions:
- CML plays a significant role in the inflammatory pathways of diabetic nephropathy and type II diabetes.
- The findings suggest CML as a potential biomarker or therapeutic target in diabetes-related kidney disease.
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