Independently and blinded to these results, two board-certified rheumatologists performed medical record reviews to validate lupus and lupus nephritis according to American College of Rheumatology Criteria for Systemic Lupus Erythematosus14 (link), 15 (link). To validate the presence of lupus nephritis, we employed the ACR criteria14 (link), 15 (link) referring to the presence of nephritis (persistent proteinuria > 0.5 gms/day, or > 3+ on urinalysis, or cellular casts), AND/OR biopsy-proven renal disease attributed to lupus and classified as Class-III-IV or V (focal or diffuse glomerulonephritis or membranous nephropathy) according to the World Health Organization classification16 (link) for subjects identified by each algorithm. We calculated the positive predictive value (PPV) for each strategy. PPV is calculated as the number with confirmed lupus nephritis divided by the total number subjects within that strategy.
Lupus Nephritis
It can lead to serious complications if not properly managed.
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Example 11
The autoantibody profiles of SLE patients with lupus nephritis were compared with those of SLE patients without lupus nephritis. Following univariate statistical evaluation, a threshold value of p<0.05 and a 1.5 times modified reactivity compared with the control group were applied. 85 antigens met these criteria and are detailed in Table 2.
Group 2 in Table 2 contains 30 additional and important antigens which can be used for the generation of lupus nephritis biomarker panels.
An L1-penalised logistic regression model with five-fold cross validation and twenty times repetition was computed for the selection of the best candidates. The antigens selected most frequently in this model computation with a frequency of more than 50% constituted the best candidates for the diagnosis of lupus nephritis.
Group 5 comprises further statistically significant antigens suitable for the diagnosis of lupus nephritis.
To investigate whether CNTN1 antibodies might be more widely associated with nephrotic syndrome caused by idiopathic MGN itself, we examined 295 serum samples from patients with idiopathic membranous nephropathy, collected as part of the MRC Glomerulonephritis bank [14 (link)].
Serum samples from 70 patients with other antibody-mediated CNS neurological disorders, 20 with multiple sclerosis, 120 individuals without neurological disease, and 46 patients with lupus nephritis, including pure class V membranous lupus nephritis, were also obtained as controls (
Information that could identify individual participants was stored confidentially and only accessible at the time of data collection to treating physicians, or those with necessary ethical approval and Good Clinical Practice (GCP) training. Data was subsequently de-identified.
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More about "Lupus Nephritis"
It can lead to serious complications if not properly managed.
Lupus nephritis is a subtype of glomerulonephritis, a group of kidney diseases that affect the glomeruli, the filtration units of the kidneys.
Symptoms of lupus nephritis may include proteinuria, hematuria, hypertension, and edema.
Diagnosis typically involves kidney biopsy, which can determine the severity and class of the disease.
Treatment often includes immunosuppressant medications, such as corticosteroids, mycophenolate mofetil, or cyclophosphamide, to control inflammation and prevent further kidney damage.
Researchers studying lupus nephritis may utilize various techniques and tools, such as the ECL assay for measuring autoantibody levels, the AU5421 biochemistry analyzer for lab tests, the XC-408 ESR Monitor for erythrocyte sedimentation rate, and Rabbit anti-OXR1 and Anti-GPX1 antibodies for oxidative stress markers.
Anti-CD74 polyclonal antibodies can be used to assess immune cell activation, while RIPA buffer and FITC-labeled goat anti-mouse IgG facilitate protein extraction and visualization, respectively.
The LSM 510 confocal laser scanning microscope can be employed for high-resolution imaging of kidney tissue, and the WithDeadEnd™ Colorimetric Apoptosis Detection System can be used to detect and quantify apoptosis, or programmed cell death, in the kidneys.
By leveraging these tools and techniques, researchers can gain a deeper understanding of the underlying mechanisms of lupus nephritis, identify potential biomarkers, and develop more effective treatments to improve the quality of life for patients suffering from this complex and debilitating condition.
PubCompare.ai's AI-driven platform can assist in optimizing this research by identifying the most effective protocols from the literature, preprints, and patents, thereby enhancing reproducibility and accuracy.