Dynamic Thiol-disulfide Homeostasis Research Articles

Comparative analysis of thiol-disulfide homeostasis dynamics between elective cesarean section and uncomplicated vaginal delivery: insights into perinatal oxidative balance.

Thiols are organic compounds containing sulfhydryl groups that exert antioxidant effects via dynamic thiol-disulfide homeostasis. The shift towards disulfide indicates the presence of an oxidative environment. Different modes of delivery can affect thiol-disulfide homeostasis. Accordingly, we planned this research to evaluate the effects of the mode of delivery on thiol-disulfide homeostasis in both maternal serum and fetal cord blood samples. We conducted a prospective case-control study involving two groups: vaginal delivery (n=50) and elective cesarean section (CS) (n=45). The vaginal delivery group exclusively comprised uncomplicated term deliveries, while the CS group included pregnant individuals with scheduled cesarean deliveries due to the absence of spontaneous labor onset. Maternal serum and fetal cord blood samples were collected, and thiol-disulfide exchanges were analyzed using an automated method capable of measuring both aspects of the thiol-disulfide balance. The levels of native thiol (-SH) and total thiol in both maternal serum and fetal cord blood samples were significantly higher in the vaginal delivery group than those in the CS group. An important discovery of our study was that fetal cord disulfide (-SS) level, which may reflect oxidative stress, was higher in newborns born via vaginal delivery when examined alone. However, in both maternal and fetal cord blood, the combined ratios, SS/SH ratio (%), SS/Total thiol ratio (%), and SH/Total thiol ratio (%) were observed to be similar between the groups in both maternal and fetal cord blood. It was observed that as the mother's weight gained during pregnancy increased, SS/SH and SS/total thiol increased (positive correlation), while SH/total thiol decreased (negative correlation). Our results showed that the dynamic thiol-disulfide homeostasis was greatly influenced by the way of delivery and supported the idea that vaginally-delivered infants may have more oxidative stress.

Comparison of the effects of Anesthesia Methods on Dynamic Thiol/Disulfide Homeostasis in Patients with Chronic Obstructive Pulmonary Disease Under Surgical Stress

Purpose: Chronic Obstructive Pulmonary Disease (COPD) is linked to increased oxidative stress. Changing oxidative stress status due to anesthesia applications may affect surgical stress and the incidence of postoperative complications.
 This study aims to contrast the impacts of general anesthesia (GA) and spinal anesthesia (SA) on the dynamic thiol-disulfide homeostasis among patients with COPD who are undergoing inguinal hernia surgery.
 Materials and Methods: As per the 2017 Global Strategy Report for the Diagnosis, Management, and Prevention of COPD, patients with airflow obstruction (50% ≤ FEV 1 < 79%) and FEV1/FVC < 0.7 were evaluated. A total of 52 COPD patients, group GA (n= 26) and group SA (n= 26), who were scheduled for inguinal hernia surgery, were included in this observational study. Blood specimens were collected during the preoperative period and at the postoperative 24th hour. Parameters of thiol/disulfide homeostasis were analyzed.
 Results: Both in the GA group and the SA group, a decrease in total thiol, native thiol, and disulfide values was observed after anesthesia compared to before anesthesia. However, only in Group SA, the decrease in post-anesthesia total thiol (p

Dynamic thiol-disulfide homeostasis as an oxidative stress marker in ankylosing spondylitis and undifferentiated spondyloarthropathy

Dynamic thiol-disulfide homeostasis as an oxidative stress marker in ankylosing spondylitis and undifferentiated spondyloarthropathy

Effect of mode of delivery on neonatal oxidative stress and dynamic thiol-disulfide homeostasis.

To evaluate the effect of the mode of delivery on neonatal oxidative stress and dynamic thiol-disulfide homeostasis. Sixty women who were followed up in the Obstetrics and Gynecology clinic were included in this prospective study. Cord blood samples were obtained from women who underwent cesarean section (CS) and vaginal delivery (VD). Total oxidant status and total antioxidant status levels were measured by spectrophotometry. The dynamic thiol-disulfide balance was determined by colorimetry. The total antioxidant status and oxidative stress index levels were higher and total oxidant status levels were lower in the VD group compared with the CS group. Native and total thiol levels were higher while disulfide levels were lower in the VD compared with the CS delivery group, while disulfide levels were higher in the CS group. These results indicate that disulfide formation leads to decreased antioxidant capacity in women undergoing CS. Monitoring of dynamic thiol-disulfide levels may thus provide clinicians with important information on the oxidative stress status in newborns.

İdiyopatik polihidramniyoz olgularında dinamik tiyol/disülfit homeostazı ve iskemik modifiye albümin seviyeleri

Objective: The aim of study was to determine whether idiopathic polyhydramnios is in relation with dynamic thiol-disulfide homeostasis and ischemia modified albumin levels or not. 
 Materials and methods: In this prospective case- control study, a total of 126 participants were included. The patient group consisted of 56 patients who were diagnosed idiopathic polyhydramnios, and the control group consisted of 56 healthy normal pregnant. Native thiol (-SH), total thiol (-SH. -SS), dynamic disulfide (-SS), values from maternal serum were measured and compared between groups.
 Results: 112 patients aged between 18-35 years, consisting of 56 idiopathic polyhydramnios and 56 control groups were included in the study. Maternal serum native and total thiol values were significantly higher in study group compared to control group (382.2 ±78.5 mmol/L vs. 331.8 ±43.9 mmol/L, p

Changes in Dynamic Thiol/Disulfide Homeostasis, and Substance P, B-Endorphin and α-Tocopherol Concentrations in the Spinal Cord of Chronically Lame Dairy Cows.

Initial lameness inflammation leads to chronic lameness and development of chronic pain due to the release of pro-inflammatory mediators such as reactive oxygen species (ROS), which are implicated in the transition from acute to chronic pain, and free radical scavengers countering thiol, substance P (SP), and β-endorphin (BE). The present study aimed to evaluate the dynamic thiol-disulfide homeostasis, α-tocopherol concentrations and SP and BE concentrations in the spinal cord of chronically lame dairy cows. Ten lame and 10 non-lame cows with a parity range of 2-6 were selected for the study. Lame cows had a history of up to 3 months of lameness. Spinal cord samples were obtained from the L2 to L4 lumbar vertebrae aspect of each animal. A thiol-disulfide homeostasis assay was performed using absorbance, and the α-tocopherol concentration was determined by HPLC. SP and BE concentrations were measured using ELISA kits. The results indicated that SP and BE were significantly higher in the spinal cord of lame cows. In contrast, disulfide levels and α-tocopherol concentrations were significantly lower in the spinal cord of lame cows. In conclusion, disulfide levels and α-tocopherol concentrations indicated a defective antioxidant response in cows with chronic lameness. The results of SP and BE concentrations suggested chronic pain and a defective endogenous analgesic response.

Evaluation of Oxidative Stress Levels and Dynamic Thiol-disulfide Balance in Patients with Retinopathy of Prematurity

Purpose The aim of this study is to evaluate both dynamic thiol-disulfide homeostasis and oxidative stress (OS) levels in patients with retinopathy of prematurity (ROP). Methods A total of 129 infants of <34 weeks gestational age were enrolled in the present study. The thiol-disulfide homeostasis was determined by using the new, cost-effective and fully automated colorimetric method. Total antioxidant status (TAS), Total oxidant status (TOS) and Oxidative stress index (OSI) levels were evaluated. Results We found serum TAS levels were lower while serum TOS and OSI levels were significantly higher in patients with ROP compare to the without ROP group (p < .05). However, native, total and disulfide values were not statistically significant between the groups (p > .05). In addition, we also evaluated the native, total and disulfide levels in patients with ROP according to grades and no statistically significant results were found (p > .05). Low birth weight (p = .001), gestational age (p = .001) and 5-min Apgar score were significantly lower in the ROP group. Conclusion This study revealed that dynamic thiol-disulfide homeostasis was changed in patients with ROP. Increased TOS and decreased TAS levels may be associated with functional reduction of the antioxidant system due to increased OS. This indicate that ROP patients are highly sensitive to OS. The dynamic thiol-disulfide homeostasis may conduce to the pathophysiological mechanism and disease follow-up in patients with ROP. The results of this study show that ROP patients are highly sensitive to oxidative stress.

Dynamic Thiol-Disulfide Homeostasis in Children with Newly Diagnosed Iron Deficiency Anemia

Objective: Iron is an element, which is found in the structure of antioxidant enzymes and has an important role in the inactivation of reactive oxygen species. Disruption of oxidant-antioxidant balance may be playing a role in the pathogenesis of iron deficiency anemia (IDA). Dynamic thiol-disulfide homeostasis (DTDH) and serum ischemia-modified albumin (IMA) levels are important indicators of pro-oxidant/antioxidant status. In this study, we aimed to evaluate DTDH parameters and serum IMA levels in children with newly diagnosed IDA, who did not receive iron therapy. Material and Methods: Fifty patients diagnosed with IDA and 33 healthy age- and sex-matched control patients were included in the study. DTDH parameters and IMA levels of the patients and control groups were measured. The same parameters were also compared in patients with Hb&amp;lt;7 g/dl (profound IDA) (n:14/50, 28%) and Hb≥7 g/dl (mild-moderate IDA) (n: 36/50, 72%) in the IDA group. The relationship between DTDH parameters in these groups were investigated. Results: Native thiol, total thiol, native thiol/total thiol levels, constituting antioxidant capacity indicators, were found to be significantly lower in IDA patients; while oxidant disulfide, disulfide/native thiol, disulfide/total thiol, and IMA levels were found to be statistically higher compared to those in the control group (p&amp;lt;0.050). When DTDH parameters and IMA levels were examined; there was a positive correlation between antioxidant parameters and a negative correlation between oxidative parameters with hemoglobin and ferritin levels (p&amp;lt;0.050). Also, oxidative parameters were found to be much higher in profound IDA group than in the group with Hb&amp;gt;7 g/dl (p&amp;lt;0.050). Conclusion: In this study, increase in serum disulfide and IMA levels with the decrease in serum native thiol and total thiol levels indicated oxidative stress in IDA patients before treatment, compared to the control group. Evaluation of these indicators in children is important in predicting the toxicity due to IDA.

Evaluation of adult immunoglobulin A vasculitis with oxidative stress and inflammation biomarkers

IgA vasculitis (IgAV) is a leukocytoclastic vasculitis affecting small vessels and is more common in children than in adults. In this study, we aimed to investigate the effects of oxidative stress in adult IgAV patients by Dynamic Thiol Disulfide Homeostasis (DTDH) and Ischemia Modified Albumin (IMA) levels. We also aimed to correlate the presence of inflammation detected by C-Reactive Protein (CRP) and Highly Sensitive C-Reactive Protein (hsCRP) with these oxidative stress parameters. Forty-one IgAV patients and forty-five controls were included in the study. Patients were classified as "active" or "in remission" according to the British Vasculitis Activity Score (BVAS). Measured parameters were compared between the groups. DTDH, IMA, CRP and hsCRP parameters were analyzed in both patient and control groups. According to our results, disulfide (p=0.047), index 1 (p&lt;0.001), index 2 (p&lt;0.001), IMA (p&lt;0.001), CRP (p=0.005) and hsCRP (p=0.004) levels were significantly increased while native thiol (p&lt;0.001), total thiol (p&lt;0.001) and index 3 (p&lt;0.001) levels were significantly decreased in IgAV patients. The results of this study show that oxidative stress is associated with IgAV disease and also with disease severity. The oxidative stress parameters evaluated were also correlated with markers of inflammation.

Evaluation of dynamic thiol-disulfide homeostasis on HPV positive-women in progression to cervical intraepithelial lesion

Evaluation of dynamic thiol-disulfide homeostasis on HPV positive-women in progression to cervical intraepithelial lesion

Assessment of dynamic thiol-disulfide homeostasis in patients with lipoid proteinosis (Urbach-Wiethe syndrome).

SUMMARYOBJECTIVE:Lipoid proteinosis is a rare autosomal recessive genetic dermatological disease that occurs due to the accumulation of hyaline material in the skin and mucous membranes. This study aimed to investigate whether dynamic thiol-disulfide homeostasis is a new marker of oxidative stress in patients suffering from lipoid proteinosis.METHODS:The study group involved 17 patients with lipoid proteinosis and 17 healthy controls with same gender and age. Native thiol, total thiol, disulfide levels, and thiol-disulfide indexes were measured with the fully automated spectrophotometric method described by Erel and Neselioglu, and the results of the two groups were statistically analyzed.RESULTS:Serum total thiol and native thiol levels were significantly lower in lipoid proteinosis group compared to the control group (p=0.020 and p=0.014, respectively). The disulfide levels were found to be higher in lipoid proteinosis group, but there was no significant difference between two groups.CONCLUSIONS:Impaired dynamic thiol-disulfide homeostasis was observed in lipoid proteinosis patients, suggesting that thiol-disulfide homeostasis may have a role in the pathogenesis of this disease.

Evaluation of dynamic thiol-disulfide homeostasis and ischemia-modified albumin levels in patients with chronic lymphocytic leukemia

This is the first study to evaluate both the dynamic thiol-disulfide homeostasis and ischemia-modified albumin (IMA) levels in patients with chronic lymphocytic leukemia (CLL). Twenty-nine patients with CLL and 20...

PROGNOSTIC VALUE OF DYNAMIC THIOL-DISULFIDE HOMEOSTASIS IN PREDICTING HOSPITAL MORTALITY IN HYPOXEMIC RESPIRATORY FAILURE

Hypoxemic respiratory failure (HRF) has a PaO2 &lt; 60 mmHg with normal or subnormal PaCO2. The gas exchange is impaired at the level of the alveolo-capillary membrane. HRF is associated with high mortality in hospital, and there is no diagnostic laboratory test to predict this mortality. This study evaluates the possibility of predicting mortality in HRF patients with dynamic thiol-disulfide homeostasis parameters, which are indicators of oxidation state. Sixty-two patients with HRF and 40 healthy controls were included in the study. Dynamic thiol-disulfide parameters were studied from the serum of all participants. Total and native thiol levels were significantly lower in the patients than in the controls (p &lt; 0.05). Disulfide levels were higher in patients who died than survivors (p

Dynamic Thiol-Disulfide Homeostasis as a Marker for Oxidative Stress in Lung Transplant Candidates.

Oxidative stress developing due to oxidant/antioxidant imbalance plays a crucial role in the etiopathogenesis of chronic progressive lung diseases.The condition is typically more severe in lung transplant candidates with end-stage lung disease. Here, we investigated dynamic thiol-disulfide homeostasis as a marker for oxidative stress in lung transplant candidates. The study included 40 patients with end-stage lung disease with indications for lung transplant (candidate group) and 40 healthy controls. Patient demographic data, laboratory results, and thiol-disulfide homeostasis values were recorded. We categorized patients according to their primary diseases and noted clinical measurements of forced expiratory volume in 1 second, forced vital capacity, 6-minute walk test, systolic pulmonary artery pressure, and lung allocation scores.Thiol-disulfide homeostasis parameters were compared before and after transplant. Demographic characteristics were similar in the candidate and control groups. In the candidate group, native thiol and total thiol levels (antioxidant parameters of thiol-disulfide homeostasis) were significantly lower, whereas disulfide-to-native thiol and disulfide-to-total thiol ratios (oxidant parameters of thiol-disulfide homeostasis) were significantly higher. We observed no significant differences between the disease subgroups in terms of thioldisulfide homeostasis parameters. Moderately significant correlations were shown between the antioxidant markers ofthiol-disulfide homeostasis and the clinical measurements, including the lung allocation scores. Our multiple regression analyses showed that native thiol and total thiol were significant predictive factors to estimate the lung allocation score. During the study period, 6 patients (15%)received lung transplant. There were significant differences in antioxidant parameters ofthiol-disulfide homeostasis in the pre- versus posttransplant periods. In patients with end-stage lung disease, the dynamic thiol-disulfide homeostasis status is altered in favor of oxidants. Thus, thiol-disulfide homeostasis parameters can be used to detect oxidative stress and estimate lung allocation scores in these patients. Lung transplant may have positive effects on oxidative stress.

Dynamic Thiol-Disulfide Homeostasis in Children With β-Thalassemia Trait

In children with β-thalassemia (β-thal) trait, tissue damage occurs with oxidative stress due to oxygen free radicals and reactive oxygen species (ROS) production. Dynamic thiol-disulfide homeostasis (DTDH) is one of the most important indicators showing the pro-oxidant/antioxidant status in the body. In this study, we aimed to examine the status of DTDH by measuring native thiol, disulfide, and total thiol levels in children with β-thal trait. The study included 40 children with β-thal trait and 30 healthy controls (matched by age and gender). The DTDH parameters were measured by an automated method and results were compared between the groups. The levels of native thiol, total thiol, and disulfide in children with β-thal trait group were statistically significantly higher than the control group (p < 0.001). There was no significant difference in disulfide/native thiol, disulfide/total thiol, and native thiol/total thiol levels between the groups. In addition, there was no correlation between hemoglobin (Hb) and serum ferritin levels with the markers of DTDH in children with β-thal trait. In our study, a significant increase was found in native thiol, total thiol, and disulfide levels in response to oxidative stress in children with β-thal trait compared to the healthy control group. Disulfide levels of the children with β-thal trait were higher than the control group, showing oxidative stress is high in β-thal trait. Accordingly, it increases the native thiol and total thiol capacity as compensation.

Thiol-Disulfide Homeostasis in Skin Diseases.

Oxidative stress represents the imbalance between oxidants and antioxidants and has been associated with a wide range of diseases. Thiols are the most important compounds in antioxidant defense. There is an equilibrium between thiols and their oxidized forms, disulfides, known as dynamic thiol-disulfide homeostasis (TDH). In 2014, Erel and Neselioglu developed a novel automated assay to measure thiol and disulfide levels. Subsequently, many researchers have used this simple, inexpensive and fast method for evaluating TDH in various disorders. We have reviewed the literature on the role of TDH in skin diseases. We identified 26 studies that evaluated TDH in inflammatory diseases (psoriasis, seborrheic dermatitis, atopic dermatitis, vitiligo, acne vulgaris and rosacea), allergic diseases (acute and chronic urticaria) and infectious diseases (warts, pityriasis rosea and tinea versicolor). The results are heterogeneous, but in most cases indicate changes in TDH that shifted toward disulfides or toward thiols, depending on the extent of oxidative damage.

Dynamic Thiol-Disulfide Homeostasis in Lung Transplant Recipients.

In this study, we investigated dynamic thiol-disulfide homeostasis as a new indicator of oxidative stress in lung transplant recipients. In addition, we compared dynamic thiol-disulfide homeostasis parameters according to transplant indication and time after transplant. This study had a single-center, observational, randomized design. In terms of transplant indications, lung transplant recipients were grouped as chronic obstructive pulmonary disease, interstitial lung disease, bronchiectasis, and other indications. To make comparisons based on time after transplant, lung transplant recipients were categorized into the following groups: >6 and ≤24 months, >24 and ≤48 months, >48 and ≤72 months, and >72 months. A fully automated spectrophotometric technique was used to measure dynamic thiol-disulfide homeostasis in fasting blood samples. Our study included 34 lung transplant recipients and 36 healthy volunteers. Native thiol (P = .005) and total thiol levels (P = .06) were lower in lung transplant recipients. Disulfide levels were similar. Disulfide-to-native thiol (P = .027) and disulfide-to-total thiol ratios (P = .027) were significantly higher in lung transplant recipients. Native thiol-to-total thiol ratios were lower in lung transplant recipients (P = .027). When we examined patients according to transplant indication, no statistically significant differences were found in dynamic thiol-disulfide homeostasis parameters, except for total thiol and disulfide levels. We also found no significant differences when we examined dynamic thiol-disulfide homeostasis parameters according to time after transplant. Thiol-related antioxidant activity is significantly reduced after lung transplant, regardless of indication and transplant time. Ensuring oxidative balance in lung transplant recipients with an antioxidant supplement regimen can prevent damage from oxidative stress.

Increased oxidative stress and imbalance dynamic thiol–disulfide homeostasis in Rosacea

Background: Rosacea is a chronic progressive inflammatory disease and characterized by facial erythema, telangiectasias, papules, and pustules. The disease is more common in women than in men while affecting 2%–10% of the population. Though the pathogenesis of rosacea is not fully understood, oxidative stress is one of the asserted pathogenic factors. In this study, we purposed to assess the oxidative stress and thiol–disulfide homeostasis (TDH) in rosacea disease. Materials and Methods: Forty patients with rosacea and 40 healthy people as a control group, both in ages of 18–70 years, with the same demographic characteristics were included, who were applied to the Istanbul Training and Research Hospital Dermatology Clinic. Serum total antioxidant status (TAS), total oxidant status (TOS), total thiol (TT), and native thiol (NT) levels were evaluated by using the automated and spectrophotometric method according to Erel and Neselioglu. Oxidative stress index (OSI), disulfide (DIS) levels, and NT/TT, DIS/TT and DIS/NT percentages were calculated mathematically. Results: TAS, TT, and NT levels were decreased in rosacea patients compared with the healthy group, whereas TOS, OSI, and DIS levels were increased. Additionally, although DIS/TT and DIS/NT percentages were higher in patients, NT/TT ratio was lower than the healthy group, and these findings were statistically significant (p < 0.001). Conclusion: The results showed that oxidative stress levels were increased in rosacea patients and TDH shifted toward DIS formation. It has been thought that oxidative stress is a parameter that may be utilized in the clinical evaluation of the disease.

THE BIDIRECTIONAL EFFECT OF CREATINE SUPPORTS THE MAINTENANCE OF OXIDANT-ANTIOXIDANT HOMEOSTASIS DURING EXERCISE

The importance of supplements used with exercise is increasing day by day. In this study, it was aimed to evaluate the effects of creatine monohydrate (CrM) supplementation with different intensities of exercise on oxidative stress through dynamic thiol disulfide homeostasis. Fourty two BALB/c mice were used and randomly divided into 6 groups; control (C), low-intensity exercise (LIE), high-intensity exercise (HIE), C+CrM (4% of daily diet), LIE+CrM, and HIE+CrM groups. Exercise groups were performed low-intensity (8m/min/30min/day) and high-intensity (24m/min/30min/day) exercise on a mouse treadmill for 8 weeks. At the end of the experimental period, the thiol disulfide homeostasis levels analyzed by using a new automated measurement technique. When the native thiol and total thiol values were examined the difference between the groups was statistically significant (respectively, p=0.029, p=0,035). Creatine intake with exercise decreased native thiol and total thiol levels. However, serum disulfide levels were lower in LIE+CrM compared to other study groups, but there was no statistically significant difference. It is thought that creatine supplementation with exercise reduces the thiol-disulfide homeostasis burden of the organism, and that after the depletion of creatine stores, the sustainability of oxidant-antioxidant homeostasis can be extended, thus prolonging the duration of antioxidant resistance.

Investigation of Dynamic Thiol Disulfide Homeostasis in Acute Respiratory Failure Patients in Intensive Care Unit

Investigation of Dynamic Thiol Disulfide Homeostasis in Acute Respiratory Failure Patients in Intensive Care Unit