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Systemic Lupus Erythematosus - Wiley Online Library

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Last Updated: 27 May 2022

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Developing a Mouse Model to Test the Impact of Metabolic Syndrome on Systemic Lupus Erythematosus‐Induced Organ Damage

Methods and Findings Female C57BL/6 mice were untreated or treated epicutaneously with the TLR7 agonist imiquimod, and were fed a high-fat "Western" diet or control diet for six weeks, with the TLR7 agonist imiquimod. Both IMQ and untreated mice's increased body fat, gonadal fat pad mass, and plasma leptin levels were found between HF and control mice. In comparison to control animals, HF animals had an increase in 24 hour calorie intake in the 6th week. At the same time, HF diet increased total cholesterol when compared to control diet-fed animals. Both the HF diet and IMQ therapy significantly raised fasting blood glucose levels. Fasting insulin levels in a diet-dependent manner were affected by IMQHF treatment in mice compared to IMQ-treated control rats, with plasma insulin levels similar to untreated mice on HF and control diets.

Source link: https://onlinelibrary.wiley.com/doi/10.1096/fasebj.2022.36.S1.R2250


Renal TLR7 expression is associated with renal injury in female mouse model of systemic lupus erythematosus

In female SLE mice, we speculated that renal TLR7 causes the renal injury and hypertension. Mean arterial pressure was also measured in conscious mice at 35 weeks of age using indwelling arterial catheters. SLE mice were found to have elevated plasma dsDNA autoantibodies in comparison to female controls, male SLE mice, and male controls, as shown by the 30 weeks. At 30 weeks, 32% of female SLE mice had albuminuria compared to 5 percent of male controls, 5% of male SLE, and no male controls. 63% of female SLE mice had albuminuria compared to 5% of female controls, 53% of male SLE mice, and no male controls at 35 weeks. Female SLE mice had lower GFR in female SLE mice than males at this same time period. TLR7-expressing TLR7 in female control and male SLE mice was found in a significantly higher renal cortical expression in TLR7 mice. When compared to both female control mice and male SLE mice, Renal cortical expression of TNF, a downstream effector of TLR7, was elevated in female SLE mice. Both female and male SLE mice were hypertensive at 35 weeks: blood pressure in female SLE and male SLE were higher in female SLE and male SLE mice than in male SLE and male SLE, compared to male controls. Conclusion In female SLE mice, increased expression of renal TLR7 and TNF indicates renal injury and hypertension. Both female and male lupus nephritis should be further investigated with TLR7 molecular pathways.

Source link: https://onlinelibrary.wiley.com/doi/10.1096/fasebj.2022.36.S1.R2320


Sensitivity to Iron‐Mediated Pro‐Inflammatory Signaling in NZBWF1 Mice, a Model of Systemic Lupus Erythematosus

About half of patients, an autoimmune disease systemic lupus erythematosus most commonly affects women and can lead to lupus nephritis as a common and serious condition. The F1 hybrid of New Zealand Black X New Zealand White mice is a well-established mouse model for LN research. The onset of albuminuria in female 34-week NZBWF1 mice was attributed to renal iron accumulation, and iron may contribute to renal injury, according to our previous reports. This research investigates the possibility that 34-week NZBWF1 lupus mice are sensitized to iron's harmful and pro-inflammatory effects compared to eight-week normal NZBWF1 mice. Methods and Results Female 8-week and 34-week NZBWF1 mice, as well as age-matched healthy control NZW mice, underwent 24 h urine collection to establish non-albuminuric status. Lupus and control mice were compared within strains by age and treatment, as both strains were compared within strains. In the NZBWF1 and the control NZW mice, ironsucrose treatment significantly raised plasma MCP1 concentrations. Age had no effect on this effect on NZW mice, although the iron-sucrose-induced increase in MCP1 in NZBWF1 mice was noticeably higher in 34 weeks compared to 8-week mice. However, iron sucrose therapy showed no improvement in the 34-week NZBWF1 mice relative to 8-week mice, consistent with early stages of renal injury, but iron sucrose therapy did not have a significant effect.

Source link: https://onlinelibrary.wiley.com/doi/10.1096/fasebj.2022.36.S1.R2631


Differential distribution of vitamin D receptor (VDR) gene variants and its expression in systemic lupus erythematosus

In 29 patients and 17 HC concerning SLE susceptibility as well as clinical features, we investigated VDR SNP frequencies in 128 SLE patients and 138 healthy controls, as well as mRNA difference expression. In Cdx/G/G and G/G, and patients with nephritis, we found a significant decline in VDR expression levels relative to patients and controls overall, as well as in patients with nephritis and related conditions. Our findings found that VDR SNPs had a direct effect on SLE susceptibility and, in particular clinical features, focusing on mRNA expression in SLE patients and patients with nephritis.

Source link: https://onlinelibrary.wiley.com/doi/10.1111/iji.12576


Progressive multifocal leukoencephalopathy in a patient with systemic lupus erythematosus and autoimmune hepatitis

Progressive multifocal leukoencephalopathy is a rare demyelinating central nervous system disease that occurs in the context of immunosuppressive diseases such as human immunodeficiency virus / acquired immunodeficiency syndrome, immune disorders, and hematologic malignancies. We had a 54-year-old woman with systemic lupus erythematosus and coexisting autoimmune hepatitis who died with progressive cognitive decline, right hemiparesis, and ataxia who had PML.

Source link: https://onlinelibrary.wiley.com/doi/10.1111/1756-185X.14331


Serum cytokines to predict systemic lupus erythematosus clinical and serological activity

We wanted to investigate interleukin 6, interferongamma, IL, 10, and tumor necrosis factor as predictors of systemic lupus erythematosus clinical and serological development, as well as their relationship with the treatment received. According to the 2012 Systemic Lupus International Collaborative Clinics criteria, we performed a retrospective review of 77 patients with SLE. In patients in SA, AD, receiving steroids alone, and in patients without CR or LDAS, IL-6 values were higher in patients in patients with sarcastic syndrome alone. Although IL10 values were higher in patients with CR, IFN was associated with anti-double stranded DNA positivity and immunosuppression, while immunosuppression was correlated with anti-double stranded DNA positivity and immunosuppression. The IL6IFN product was able to predict anti-double stranded DNA antibodies positivity, SA, AD, steroid therapy, and the absence of LDAS. In conclusion, IL6, IL10, and IFN will all help to determine SLE serological and clinical activity.

Source link: https://onlinelibrary.wiley.com/doi/10.1111/cts.13283


Nonlinear Population Pharmacokinetics of Anifrolumab in Healthy Volunteers and Patients With Systemic Lupus Erythematosus

The anifrolumab arms from 5 clinical trials in patients with systemic lupus erythematosus and healthy volunteers were analyzed, as well as healthy volunteers. The increase in Anifrolumab use went from 100 to 1000 mg IV every four weeks, according to the official. In IFNGShigh patients and 0. 153 L/day in IFNGSlow/healthy volunteers, based on population pharmacokinetics analysis, the baseline median linear CL was 0. 193 L/day. Anifrolumab at a dosage of 300 mg IV every four weeks was expected to be below the lower limit of quantitation in 95% of patients, a new trend. anifrolumab showed nonlinear pharmacokinetics and time-varying linear CL, with doses of 300 mg IV every four weeks providing sustained anifrolumab concentrations. Patients with moderate to severe SLE were shown further evidence to favor the use of anifrolumab 300 mg IV every four weeks in patients with moderate to severe SLE.

Source link: https://onlinelibrary.wiley.com/doi/10.1002/jcph.2055


Relationship Between Anifrolumab Pharmacokinetics, Pharmacodynamics, and Efficacy in Patients With Moderate to Severe Systemic Lupus Erythematosus

In patients with elevated IFNGS, pharmacodynamic neutralization was determined by a 21-gene type I interferon gene signature. Response rates were compared across 21IFNGS neutralization quartiles, according to the British Isles Lupus Assessment Group-based Composite Lupus Assessment Group. Overall, 819 patients received either an anifrolumab or placebo, of whom 676 were IFNGS high. Increased median 21IFNGS neutralization, which was rapid and sustained with anifrolumab 300 mg, lower and delayed with anifrolumab 150 mg, and minimal with placebo were found during 52 weeks. Due to the higher estimated median trough concentration, the percentage of patients with week 24 anifrolumab trough concentration exceeding the IC80 was higher with anifrolumab 300 mg versus anifrolumab 150 mg. With 21IFNGS neutralization, BICLA response rates increased in the highest vs. lowest neutralization quartiles at week 52; for the first vs. lowest neutralization quartiles at week 52; more patients had a BICLA response in the highest vs. lowest neutralization quartiles increased with 21;IFNGS neutralization quartiles.

Source link: https://onlinelibrary.wiley.com/doi/10.1002/jcph.2054

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions