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Deprecated: Implicit conversion from float 253.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 J+Am+Coll+Nutr 2021 ; 40 (4): 327-332 Nephropedia Template TP
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l-Cysteine Stimulates the Effect of Vitamin D on Inhibition of Oxidative Stress, IL-8, and MCP-1 Secretion in High Glucose Treated Monocytes #MMPMID33596158
Jain SK; Micinski D; Parsanathan R
J Am Coll Nutr 2021[May]; 40 (4): 327-332 PMID33596158show ga
Objective: Vitamin D deficiency is common in the general population and diabetic patients, and supplementation with vitamin D is widely used to help lower oxidative stress and inflammation. The cytokine storm in SARS-CoV2 infection has been linked with both diabetes and Vitamin D deficiency. This study examined the hypothesis that supplementation with vitamin D, in combination with l-cysteine (LC), is better at reducing oxidative stress and thereby, more effective, at inhibiting the secretion of the pro-inflammatory cytokines, Interleukin-8 (IL-8) and monocyte chemoattractant protein-1 (MCP-1) in U937 monocytes exposed to high glucose concentrations. Methods: U937 monocytes were pretreated with 1,25 (OH)(2) vitamin D (VD, 10 nM) or LC (250 microM) or VD + LC for 24 h and then exposed to control or high glucose (HG, 25 mM) for another 24 h. Results: There were significantly greater reactive oxygen species (ROS) levels in monocytes treated with HG than those in controls. Combined supplementation with VD and LC showed a more significant reduction in ROS (46%) in comparison with treatment with LC (19%) or VD (26%) alone in monocytes exposed to HG. Similarly, VD supplementation, together with LC, caused a more significant inhibition in the secretion of IL-8 (36% versus 16%) and MCP-1 (46% versus 26%) in comparison with that of VD (10 nM) alone in high-glucose treated monocytes. Conclusions: These results suggest that combined supplementation with vitamin D and LC has the potential to be more effective than either VD or LC alone in lowering the risk of oxidative stress and inflammation associated with type 2 diabetes or COVID-19 infection. Further, this combined vitamin D with LC/N-acetylcysteine may be a potent alternative therapy for SARS-CoV2 infected subjects. This approach can prevent cellular damage due to cytokine storm in comorbid systemic inflammatory conditions, such as diabetes, obesity, and hypertension.
|*COVID-19 Drug Treatment[MESH]
|COVID-19/immunology[MESH]
|Chemokine CCL2/metabolism[MESH]
|Cysteine/*administration & dosage[MESH]
|Diabetes Mellitus, Type 2/drug therapy[MESH]
|Dietary Supplements[MESH]
|Drug Therapy, Combination[MESH]
|Glucose/administration & dosage[MESH]
|Humans[MESH]
|Interleukin-8/metabolism[MESH]
|Monocytes/immunology/virology[MESH]
|Oxidative Stress/*drug effects[MESH]
|SARS-CoV-2/*immunology[MESH]
|U937 Cells[MESH]
|Vitamin D Deficiency/drug therapy/immunology/virology[MESH]