scholarly journals Heat Shock-Related Protein Responses and Inflammatory Protein Changes Are Associated with Mild Prolonged Hypoglycemia

Cells ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 3109
Author(s):  
Abu Saleh Md Moin ◽  
Manjula Nandakumar ◽  
Hassan Kahal ◽  
Thozhukat Sathyapalan ◽  
Stephen L. Atkin ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Heat Shock ◽  
Stress Responses ◽  
Severe Hypoglycemia ◽  
Similar Response ◽  
Inflammatory Stress ◽  
Stress Markers ◽  
Inflammatory Protein ◽  
Related Proteins ◽  
And Oxidative Stress

Mild hypoglycemia is common in clinical practice. Severe hypoglycemia results in heat shock protein and associate co-chaperone changes. Whether mild prolonged hypoglycemia elicits a similar response with inflammatory and oxidative-stress responses compared with a severe hypoglycemic event is unclear; therefore, this pilot exploratory study was undertaken. We performed a case–control induced hypoglycemia clamp study, maintaining blood glucose at 2.8 mmol/L (50 mg/dL) for 1 h in 17 subjects (T2D (n = 10); controls (n = 7)). Blood sampling was performed at baseline, hypoglycemia, and 24 h; slow off-rate modified aptamer (SOMA)-scan plasma protein analysis of HSP-related proteins, inflammatory stress markers, and oxidative stress markers was performed. In total, 16 HSPs were analyzed. At baseline, TLR4:MD-2 complex was elevated (p = 0.01), whilst HSPA8 was lower (p < 0.05) in T2D. At hypoglycemia, UBE2N, STIP1, and UBE2L3 increased (all p < 0.05), whilst TLR4:MD-2 and HSPA8 decreased (p < 0.05) in T2D versus baseline. In follow-up after hypoglycemia, HSPs normalized to baseline by 24 h, except UBE2L3 (p < 0.05), which was decreased in controls versus baseline. Correlation of altered inflammatory markers with HSPs revealed the following: at baseline, TLR4:MD-2 correlated with CXCL10 (p < 0.01) and SIGLEC1 (p < 0.05) in controls; HSPA8 negatively correlated with IL5 (p < 0.05) in T2D. A negative correlation between urinary isoprostane 8-iso PGF2α, a marker of oxidative stress, and HSPA1A was seen at 24 h in T2D only (p < 0.05). In conclusion, the HSP changes seen for mild prolonged hypoglycemia were similar to those previously reported for a severe event. However, mild prolonged hypoglycemia appeared to elicit an increased inflammatory response that was associated with heat shock and related proteins.

Circulating leukocyte heat shock protein 70 (HSP70) and oxidative stress markers in rats after a bout of exhaustive exercise

Stress ◽  
2006 ◽  
Vol 9 (2) ◽  
pp. 107-115 ◽  
Author(s):  
J. M. F. Antunes-Neto ◽  
M. H. Toyama ◽  
E. M. Carneiro ◽  
A. C. Boschero ◽  
L. Pereira-da-Silva ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Heat Shock ◽  
Heat Shock Protein ◽  
Heat Shock Protein 70 ◽  
Exhaustive Exercise ◽  
Oxidative Stress Markers ◽  
Stress Markers ◽  
And Oxidative Stress

scholarly journals The Alternative Sigma Factor SigH Regulates Major Components of Oxidative and Heat Stress Responses in Mycobacterium tuberculosis

2001 ◽  
Vol 183 (20) ◽  
pp. 6119-6125 ◽  
Author(s):  
Sahadevan Raman ◽  
Taeksun Song ◽  
Xiaoling Puyang ◽  
Stoyan Bardarov ◽  
William R. Jacobs ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Mycobacterium Tuberculosis ◽  
Heat Stress ◽  
Heat Shock ◽  
Stress Responses ◽  
Sigma Factor ◽  
Inducible Expression ◽  
Alternative Sigma Factor ◽  
And Oxidative Stress

ABSTRACT Mycobacterium tuberculosis is a specialized intracellular pathogen that must regulate gene expression to overcome stresses produced by host defenses during infection. SigH is an alternative sigma factor that we have previously shown plays a role in the response to stress of the saprophyte Mycobacterium smegmatis. In this work we investigated the role ofsigH in the M.tuberculosis response to heat and oxidative stress. We determined that a M. tuberculosis sigHmutant is more susceptible to oxidative stresses and that the inducible expression of the thioredoxin reductase/thioredoxin genestrxB2/trxC and a gene of unknown function, Rv2466c, is regulated by sigH via expression from promoters directly recognized by SigH. We also determined that thesigH mutant is more susceptible to heat stress and that inducible expression of the heat shock genes dnaK andclpB is positively regulated by sigH. The induction of these heat shock gene promoters but not of other SigH-dependent promoters was markedly greater in response to heat versus oxidative stress, consistent with their additional regulation by a heat-labile repressor. To further understand the role ofsigH in the M.tuberculosis stress response, we investigated the regulation of the stress-responsive sigma factor genessigE and sigB. We determined that inducible expression of sigE is regulated bysigH and that basal and inducible expression ofsigB is dependent on sigE andsigH. These data indicate that sigH plays a central role in a network that regulates heat and oxidative-stress responses that are likely to be important in M.tuberculosis pathogenesis.

Comparison of Salivary Antioxidants and Oxidative Stress Status in Gestational Diabetes Mellitus and Healthy Pregnant Women

2020 ◽  
Vol 20 ◽  
Author(s):  
Fatemeh Ahmadi-Motamayel ◽  
Shima Fathi ◽  
Mohammad Taghi Goodarzi ◽  
Shiva Borzouei ◽  
Jalal Poorolajal ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Diabetes Mellitus ◽  
Gestational Diabetes ◽  
Pregnant Women ◽  
Oxidative Stress Markers ◽  
Blood Samples ◽  
Stress Markers ◽  
Total Antioxidant ◽  
Total Oxidative Stress ◽  
And Oxidative Stress

Background: One of the most common complications of pregnant women is gestational diabetes mellitus (GDM). Oxidative stress can play an important role in GDM. Objective: The aim of this study was to evaluate salivary antioxidants and oxidative stress markers in GDM. Method: Twenty pregnant women with GDM and 20 healthy pregnant women with normal blood glucose test participated in this study. Five mL of unstimulated saliva samples were collected. Spectrophotometric assay was carried out for sialochemical analysis. Stata software was used for data analysis. Results: The GDM group exhibited no significant difference in salivary total antioxidant capacity and malondialdehyde compared to the healthy control group. All of antioxidants markers, the uric acid, total antioxidant, peroxidase and catalase, decreased in GDM group that the difference of peroxidase and catalase was statistically significant. All of oxidative stress markers, the salivary malondyaldehid, total oxidative stress and total thiol, increased in GDM group. GDM group exhibited significantly higher salivary total oxidative stress levels. Conclusion: Catalase level was significantly lower and total oxidative stress was significantly higher. These two markers might have significant importance and might exhibit early changes compared to other factors in GDM. . Some of salivary antioxidants might have diagnostic, prognostic or therapeutic implications in GDM. Other studies with large sample size on salivary and blood samples need to be done to confirm this properties and salivary samples using instead of blood samples in GDM biomarkers changes.

Evaluation of Salivary Antioxidants and Oxidative Stress Markers in Type 2 Diabetes Mellitus: A Retrospective Cohort Study

2020 ◽  
Vol 20 (4) ◽  
pp. 584-590 ◽  
Author(s):  
Shima Fathi ◽  
Shiva Borzouei ◽  
Mohammad Taghi Goodarzi ◽  
Jalal Poorolajal ◽  
Fatemeh Ahmadi-Motamayel
Keyword(s):  
Oxidative Stress ◽  
Diabetes Mellitus ◽  
Control Group ◽  
Oxidative Stress Markers ◽  
Stress Markers ◽  
Type 2 Dm ◽  
Patients With Diabetes ◽  
The Difference ◽  
And Oxidative Stress

Background: Diabetes Mellitus (DM) is a progressive metabolic disorder. Objective: The aim of this study was to investigate the relationship between antioxidant and oxidative stress markers in the saliva of patients with type 2 DM and a healthy control group. Methods: In this study, 20 patients with diabetes and 20 healthy individuals were evaluated. Salivary antioxidants markers consisted of total antioxidant capacity (TAC), uric acid (UA), peroxidase and catalase. Oxidative stress markers included total oxidant status (TOS), malondealdehyde (MDA) and total thiol (SH). Sialochemical analysis was performed with spectrophotometric assay. All the statistical analyses were conducted using STATA software. Results: TAC decreased significantly in patients with diabetes. Although salivary UA and peroxidase were lower in patients with diabetes compared to the control group, the difference was not significant. Salivary catalase in patients with diabetes was significantly lower than that in the control group. MDA and TOS exhibited significantly higher levels in type 2 DM. SH levels were slightly higher in DM. Conclusions: According to the results of the present study, there were some changes in the salivary levels of some antioxidants and oxidative stress markers in patients with type 2 DM and could be measured as an indicator of serum changes..

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